CN104255066B - Access the selection method and equipment of network - Google Patents

Abstract

The invention provides a method and equipment for selecting an access network. The method includes: the access network device obtains the service access policy of the user equipment UE, and the service access policy is obtained according to the access network selection policy provided by the access network discovery and selection function ANDSF module for the UE; according to the obtained The service access policy selects an access network for the service of the UE. According to the solution provided by the embodiment of the present invention, the service access policy is generated for the UE according to the access network selection policy provided by the ANDSF module, and the UE can access the network according to the service access policy. This dynamic process can make the access network device control When the access system conflicts with the policy provided by the ANDSF, the most suitable access network can be selected for the UE.

Description

Selection method and equipment for accessing the network

technical field

The present invention relates to communication technology, in particular to a method and equipment for selecting an access network.

Background technique

The Access Network Discovery and Selection Function (ANDSF for short) module is a network element function module newly introduced into the ^3rd Generation Partnership Project (3GPP for short). The ANDSF has data management and control functions, and can respond to a user equipment (User Equipment, referred to as: UE) request for access network selection, and provide auxiliary data required for discovering user access networks and performing access network selection. ANDSF can provide three types of auxiliary data to the UE. The first type is the mobility strategy between systems, such as whether to allow inter-system mobility, etc.; the second type is access network discovery information, such as all access systems in the UE's vicinity access network information, etc.; the third category is the routing strategy between systems, including some filtering rules, such as whether a specific service flow or a specific access point (Access Point Name, referred to as: APN) is allowed to access to A certain access system and so on.

According to the auxiliary data provided by the ANDSF module and the characteristics of the current service, the UE selects the most suitable access network to realize the effective offloading of the data service.

However, there are still some problems to be solved in the ANDSF module. For example, the policy cannot be dynamically modified according to the RRM situation on the access network side. Once the access system controlled by the access network device conflicts with the policy provided by the ANDSF module, the UE cannot Connect to the most suitable network.

Contents of the invention

Embodiments of the present invention provide a method and device for selecting an access network. When an access system controlled by an access network device conflicts with a policy provided by an ANDSF, the most suitable access network can be selected for a UE.

The first aspect of the present invention is to provide a method for selecting an access network, including:

The access network device obtains the service access policy of the user equipment UE, and the service access policy is obtained according to the access network selection policy provided for the UE by the access network discovery and selection function ANDSF module;

Selecting an access network for the service of the UE according to the service access policy.

In the first implementation manner of the first aspect of the present invention, the service access policy includes:

Service radio access technology RAT priority;

And/or, information about the access points that the service allows and/or prohibits access to;

And/or, the time information of service permission access and/or access prohibition;

And/or, the address information of service permission access and/or access prohibition.

In combination with the first aspect of the present invention and the first implementation manner of the first aspect, in the second implementation manner of the first aspect of the present invention, the method further includes: obtaining the radio access bearer corresponding to the service access policy The identity of the RAB or the identity of the UE;

Then, the selecting an access network for the service of the UE according to the service access policy includes: selecting an access network for the service of the UE according to the identity of the RAB or the identity of the UE.

With reference to the first aspect of the present invention, in the third implementation manner of the first aspect of the present invention, after selecting an access network for the service of the UE according to the service access policy, the method further includes: The UE sends an access indication, where the access indication carries a service identifier and/or the access network identifier.

With reference to the third implementation manner of the first aspect of the present invention, in the fourth implementation manner of the first aspect of the present invention, the access network identifier is the type of the access network and/or the identifier of the access point in the access network .

With reference to the third implementation manner of the first aspect of the present invention, in the fifth implementation manner of the first aspect of the present invention, before sending the access indication to the UE, the method further includes: the access network device sending The UE sends a command message, and the command message is used to instruct the UE to obey the command of the network side and not to make its own decision to access the network.

With reference to the fifth implementation manner of the first aspect of the present invention, in the sixth implementation manner of the first aspect of the present invention, the command message is specifically an indication that the network supports a WLAN offload capability.

With reference to the second implementation manner of the first aspect of the present invention, in the seventh implementation manner of the first aspect of the present invention, the selecting an access network for the service of the UE according to the service access policy includes: In order of the RAT priority of the service from high to low, it is judged whether the load of the corresponding network exceeds the preset percentage; if it exceeds, the network with the second highest priority is selected as the access network of the UE.

In combination with the first aspect of the present invention, in the eighth implementation manner of the first aspect of the present invention, the access network device obtaining the service access policy of the UE specifically includes: receiving the service access policy sent by the core network device, the The service access policy is generated by the core network according to the access network selection policy provided by the UE or the ANDSF module; or, receiving the service access policy sent by the UE, the service access policy is the UE Generated according to the access network selection policy provided by the ANDSF module.

The second aspect of the present invention is to provide a method for selecting an access network, including:

The core network equipment obtains the access network selection policy provided by the access network discovery and selection function ANDSF module to the user equipment UE;

Generate a service access policy for the UE according to the access network selection policy, and send the service access policy of the UE to the access network device, so that the access network device accesses according to the service of the UE The policy selects an access network for the service of the UE.

In conjunction with the second aspect of the present invention, in the first implementation manner of the second aspect of the present invention, the service access policy includes:

Service radio access technology RAT priority;

And/or, information about the access points that the service allows and/or prohibits access to;

And/or, the time information of service permission access and/or access prohibition;

And/or, the address information of service permission access and/or access prohibition.

With reference to the second aspect of the present invention and the first implementation manner of the second aspect, in the second implementation manner of the second aspect of the present invention, the method further includes: sending the wireless access information corresponding to the service access policy Bearing the identity of the RAB or the identity of the UE to the access network device, so that the access network device selects an access network for the service of the UE according to the identity of the RAB or the identity of the UE.

With reference to the second aspect of the present invention, in the third implementation manner of the second aspect of the present invention, the generating a service access policy for the UE according to the access network selection policy includes: determining each radio access policy of the UE Bear the services carried in the RAB, and determine the ANDSF policy corresponding to each service, and generate a service access policy for the UE according to the ANDSF policy; or determine the services carried in all RABs of the UE, and determine the corresponding ANDSF policy, generating a service access policy for the UE according to the ANDSF policy.

In combination with the second aspect of the present invention, in the fourth implementation manner of the second aspect of the present invention, the core network device obtains the access network selection policy provided by the ANDSF module to the UE, including: the core network device obtains the access network selection policy from the ANDSF module Receiving the access network selection policy of the UE; or, the core network device receives the access network selection policy uploaded by the UE, and the access network selection policy uploaded by the UE is obtained by the UE from the ANDSF module.

A third aspect of the present invention is to provide a method for selecting an access network, including:

The user equipment UE receives the access network selection instruction sent by the access network device;

Selecting an access network according to the access network selection indication.

With reference to the third aspect of the present invention, in the first implementation manner of the third aspect of the present invention, before receiving the access network selection indication sent by the access network device, the method further includes: the UE obtains an access network The access network selection strategy provided by the network discovery and selection function ANDSF module; generate a service access strategy according to the access network selection strategy; send the generated service access strategy to the access network device, so that the access network device Selecting an access network for the service of the UE according to the service access policy.

With reference to the first implementation manner of the third aspect of the present invention, in the second implementation manner of the third aspect of the present invention, the service access policy includes:

Service radio access technology RAT priority;

And/or, information about the access points that the service allows and/or prohibits access to;

And/or, the time information of service permission access and/or access prohibition;

And/or, the address information of service permission access and/or access prohibition.

With reference to the first implementation manner or the second implementation manner of the third aspect of the present invention, in the third implementation manner of the third aspect of the present invention, the method further includes: setting the wireless The access bearer RAB identifier or the UE identifier is sent to the access network device, so that the access network device selects an access network for the service of the UE according to the RAB identifier or the UE identifier.

With reference to the second implementation manner of the third aspect of the present invention, in the fourth implementation manner of the third aspect of the present invention, the generating a service access policy according to the access network selection policy includes: determining each UE's Radio access carries the services carried in the RAB, and determines the ANDSF policy corresponding to each service, and generates a service access policy according to the ANDSF policy; or determines the services carried in all RABs of the UE, and determines the ANDSF policy corresponding to the service , generating a service access policy according to the ANDSF policy.

With reference to the third aspect of the present invention, in the fifth implementation manner of the third aspect of the present invention, the access network selection indication carries a service identifier and/or an access network identifier.

With reference to the fifth implementation manner of the third aspect of the present invention, in the sixth implementation manner of the third aspect of the present invention, the access network identifier is the type of the access network and/or the ID of the access point in the access network logo.

With reference to the third aspect of the present invention, in the seventh implementation manner of the third aspect of the present invention, the method further includes: the UE receives a command message sent by the access network device, the command message is used to instruct the UE to comply with The network side is not allowed to decide its access network by itself; according to the command message, stop network selection according to the ANDSF policy, and determine the access network according to the access network selection instruction.

The fourth aspect of the present invention is to provide a method for selecting an access network, including:

The user equipment UE obtains the access network selection policy and the information of the access network equipment, and the access network selection policy is provided for the UE by the access network discovery and selection function ANDSF module;

The access network is determined according to the access network selection policy and the information of the access network equipment.

With reference to the fourth aspect of the present invention, in the first implementation manner of the fourth aspect of the present invention, the information of the access network device includes: load information of the access network device or access tendency of the access network device.

With reference to the first implementation manner of the fourth aspect of the present invention, in the second implementation manner of the fourth aspect of the present invention, the access tendency of the access network device includes: the access network device prefers the UE to access the second A network either favors the UE to access the second network, or does not interfere with the UE's access network selection.

In combination with the fourth aspect of the present invention, in the third implementation manner of the fourth aspect of the present invention, the access network selection policy includes: the RAT priority of the radio access bearer RAB, and the RAT priority takes effect is the load threshold of the corresponding access network device.

In conjunction with the third implementation manner of the fourth aspect of the present invention, in the fourth implementation manner of the fourth aspect of the present invention, the determining the access network according to the access network selection policy and the information of the access network equipment includes: according to The load information of the access network equipment is used to determine the access network selection strategy used; and the priority access network is determined according to the access network selection strategy.

In combination with the first implementation manner or the second implementation manner of the fourth aspect of the present invention, in the fifth implementation manner of the fourth aspect of the present invention, the determination of the access network according to the access network selection policy and the information of the access network equipment Accessing a network includes: selecting an access network according to the access tendency indication among the networks allowed by the access network selection policy.

With reference to the fifth implementation manner of the fourth aspect of the present invention, in the sixth implementation manner of the fourth aspect of the present invention, the information of the access network device further includes an access factor, and the method further includes:

generate random factors;

Comparing the random factor with the access factor to obtain a comparison result;

Then the selecting an access network according to the access tendency indication specifically includes:

If the comparison result conforms to a preset rule, select an access network according to the access tendency indication;

If the comparison result does not conform to the preset rule, a new random factor is generated again after waiting for a preset time.

The fifth aspect of the present invention is to provide a method for selecting an access network, including:

The access network discovery and selection function ANDSF module sends the access network selection policy to the user equipment UE, and the access network selection policy includes: the radio access technology RAT priority of the service and the corresponding access network when the RAT priority takes effect. The load threshold of the network equipment; the access network selection policy is used for the UE to determine the access network of the UE service according to the access network selection policy and the load information of the access network equipment.

The sixth aspect of the present invention provides a method for selecting an access network, including:

The access network device sends the information of the access network device to the user equipment UE, the information of the access network device includes the load information of the access network device or the access tendency of the access network device; the information of the access network device It is used for the UE to determine the access network of the UE service according to the information of the access network device and the access network selection policy provided by the access network discovery and selection function ANDSF module.

With reference to the sixth aspect of the present invention, in the first implementation manner of the sixth aspect of the present invention, the information of the access network device further includes an access factor, and the access factor is used for the random The factor is compared with the access factor, and a comparison result is obtained. If the comparison result conforms to a preset rule, the UE selects an access network according to the access tendency indication; if the comparison result does not conform to a preset rule, Then the UE waits for a preset time to generate a new random factor again.

The seventh aspect of the present invention is to provide an access network device, including:

An obtaining module, configured to obtain a service access policy of the user equipment UE, where the service access policy is obtained according to the access network selection policy provided by the access network discovery and selection function ANDSF module for the UE;

A selecting module, configured to select an access network for the service of the UE according to the service access policy.

In combination with the seventh aspect of the present invention, in the first implementation manner of the seventh aspect of the present invention, the service access policy includes:

Service radio access technology RAT priority;

And/or, information about the access points that the service allows and/or prohibits access to;

And/or, the time information of service permission access and/or access prohibition;

And/or, the address information of service permission access and/or access prohibition.

With reference to the seventh aspect of the present invention or the first implementation manner of the seventh aspect, in the second implementation manner of the seventh aspect of the present invention, the obtaining module is further configured to: obtain the wireless access policy corresponding to the service access policy The identification of the bearer RAB or the identification of the UE; the selection module is further configured to: select an access network for the service of the UE according to the identification of the RAB or the identification of the UE.

With reference to the seventh aspect of the present invention, in a third implementation manner of the seventh aspect of the present invention, the access network device further includes: a sending module, configured to send an access indication to the UE, and the access indication includes Carry the service identifier and/or the access network identifier.

With reference to the third implementation manner of the seventh aspect of the present invention, in the fourth implementation manner of the seventh aspect of the present invention, the access network identifier is the type of the access network and/or the identifier of the access point in the access network .

With reference to the third implementation manner of the seventh aspect of the present invention, in the fifth implementation manner of the seventh aspect of the present invention, the sending module is further configured to: send a command message to the UE, and the command message is used to instruct the UE to comply with The network side commands and cannot decide its own access to the network.

With reference to the fifth implementation manner of the seventh aspect of the present invention, in the sixth implementation manner of the seventh aspect of the present invention, the command message is specifically an indication that the network supports a WLAN offload capability.

In combination with the second implementation manner of the seventh aspect of the present invention, in the seventh implementation manner of the seventh aspect of the present invention, the selection module is specifically configured to: determine the corresponding Whether the load of the network exceeds a preset percentage; if so, select the network with the second highest priority as the access network of the UE.

In combination with the seventh aspect of the present invention, in an eighth implementation manner of the seventh aspect of the present invention, the obtaining module includes: a first receiving unit, configured to receive a service access policy sent by a core network device, and the service access policy is The core network is generated according to the access network selection policy provided by the UE or the ANDSF module; or, the second receiving unit is configured to receive the service access policy sent by the UE, and the service access policy is the The UE is generated according to the access network selection policy provided by the ANDSF module.

The eighth aspect of the present invention provides a core network device, including:

An obtaining module, configured to obtain the access network selection strategy provided by the access network discovery and selection function ANDSF module to the user equipment UE;

A generating module, configured to generate a service access policy for the UE according to the access network selection policy, and send the service access policy of the UE to an access network device, so that the access network device can The service access policy of the UE selects an access network for the service of the UE.

With reference to the eighth aspect of the present invention, in the first implementation manner of the eighth aspect of the present invention, the service access policy includes:

Service radio access technology RAT priority;

And/or, information about the access points that the service allows and/or prohibits access to;

And/or, the time information of service permission access and/or access prohibition;

And/or, the address information of service permission access and/or access prohibition.

In combination with the eighth aspect of the present invention or the first implementation manner of the eighth aspect, under the second implementation manner of the eighth aspect of the present invention, it also includes:

A sending module, configured to send the identity of the radio access bearer RAB or the identity of the UE corresponding to the service access policy to the access network device, so that the access network device is used to select an access network for the service of the UE.

In combination with the eighth aspect of the present invention, in the third implementation manner of the eighth aspect of the present invention, the generating module specifically includes:

The first generating unit is configured to determine the services carried in each radio access bearer RAB of the UE, and determine the ANDSF policy corresponding to each service, and generate a service access policy for the UE according to the ANDSF policy;

Alternatively, the second generating unit is configured to determine services carried in all RABs of the UE, determine an ANDSF policy corresponding to the services, and generate a service access policy for the UE according to the ANDSF policies.

In conjunction with the first implementation manner of the eighth aspect of the present invention, in the fourth implementation manner of the eighth aspect of the present invention, the obtaining module includes:

A first receiving unit, configured to receive the UE's access network selection policy from the ANDSF module;

Or the second receiving unit is configured to receive the access network selection policy uploaded by the UE, the access network selection policy uploaded by the UE is obtained by the UE from the ANDSF module.

A ninth aspect of the present invention provides a user equipment, including:

A receiving module, configured to receive an access network selection instruction sent by the access network device;

A selecting module, configured to select an access network according to the access network selection instruction.

In combination with the ninth aspect of the present invention, under the first implementation mode of the ninth aspect of the present invention, it also includes:

An obtaining module, configured to obtain the access network selection strategy provided by the access network discovery and selection function ANDSF module;

A generation module, configured to generate a service access strategy according to the access network selection strategy;

A sending module, configured to send the generated service access policy to the access network device, so that the access network device selects an access network for the service of the UE according to the service access policy.

With reference to the first implementation manner of the ninth aspect of the present invention, in the second implementation manner of the ninth aspect of the present invention, the service access policy includes:

Service radio access technology RAT priority;

And/or, information about the access points that the service allows and/or prohibits access to;

And/or, the time information of service permission access and/or access prohibition;

And/or, the address information of service permission access and/or access prohibition.

With reference to the first implementation manner or the second implementation manner of the ninth aspect of the present invention, in the third implementation manner of the ninth aspect of the present invention, the sending module is further configured to: set the service access policy corresponding to The radio access bearer RAB identity or the UE identity is sent to the access network device, so that the access network device selects an access network for the service of the UE according to the RAB identity or the UE identity.

With reference to the first implementation manner of the ninth aspect of the present invention, in the fourth implementation manner of the ninth aspect of the present invention, the generation module specifically includes:

The first determining unit is configured to determine the services carried in each radio access bearer RAB of the UE, and determine the ANDSF strategy corresponding to each service, and generate a service access strategy according to the ANDSF strategy;

Alternatively, the second determining unit is configured to determine services carried in all RABs of the UE, determine an ANDSF policy corresponding to the services, and generate a service access policy according to the ANDSF policies.

With reference to the ninth aspect of the present invention, in a fifth implementation manner of the ninth aspect of the present invention, the access network selection indication carries a service identifier and/or an access network identifier.

With reference to the fifth implementation manner of the ninth aspect of the present invention, in the sixth implementation manner of the ninth aspect of the present invention, the access network identifier is an access network type and/or an identifier of an access point in the access network.

With reference to the ninth aspect of the present invention, in the sixth implementation manner of the ninth aspect of the present invention, the receiving module is further configured to: receive a command message sent by the access network device, the command message is used to instruct the UE to comply with the network side order but not to decide on its own access to the network;

The selection module is specifically configured to: stop network selection according to the ANDSF policy according to the command message, and determine an access network according to the access network selection instruction.

A tenth aspect of the present invention provides a user equipment, including:

An obtaining module, configured to obtain access network selection policies and access network device information, where the access network selection policies are provided by the access network discovery and selection function ANDSF module for the UE;

The determining module is configured to determine the access network according to the access network selection policy and the information of the access network equipment.

With reference to the tenth aspect of the present invention, in the first implementation manner of the tenth aspect of the present invention, the information of the access network device includes: load information of the access network device or access tendency of the access network device.

With reference to the first implementation manner of the tenth aspect of the present invention, in the second implementation manner of the tenth aspect of the present invention, the access tendency of the access network device includes:

The access network device favors the UE to access the first network, or favors the UE to access the second network, or does not interfere with the UE's access network selection.

In combination with the tenth aspect of the present invention, in the third implementation manner of the tenth aspect of the present invention, the access network selection policy includes: the RAT priority of the radio access bearer RAB, and the RAT priority takes effect is the load threshold of the corresponding access network device.

With reference to the third implementation manner of the tenth aspect of the present invention, in the fourth implementation manner of the tenth aspect of the present invention, the determination module specifically includes:

The first determining unit is configured to determine the access network selection strategy to be used according to the load information of the access network device;

The second determining unit is configured to determine a preferentially used access network according to an access network selection policy.

With reference to the first implementation manner or the second implementation manner of the tenth aspect of the present invention, in the fifth implementation manner of the tenth aspect of the present invention, the determination module is specifically configured to: allow access in the access network selection policy Among the incoming networks, the access network is selected according to the access tendency indication.

With reference to the fifth implementation manner of the tenth aspect of the present invention, in the sixth implementation manner of the tenth aspect of the present invention, the information of the access network device further includes an access factor, and the user equipment further includes:

Generation module for generating random factors;

A comparison module, configured to compare the random factor with the access factor to obtain a comparison result;

The determining module is specifically configured to: if the comparison result conforms to a preset rule, select an access network according to the access tendency indication; the generating module is also configured to: if the comparison result does not conform to a preset rule, Generate a new random factor again after waiting for a preset time.

The eleventh aspect of the present invention provides an access network discovery and selection function ANDSF module, including:

A sending module, configured to send an access network selection policy to the user equipment UE, where the access network selection policy includes: the radio access technology RAT priority of the service and the load of the corresponding access network device when the RAT priority takes effect Threshold: the access network selection policy is used by the UE to determine the access network of the UE service according to the access network selection policy and the load information of the access network equipment.

The twelfth aspect of the present invention provides an access network device, including:

A sending module, configured to send information about an access network device to a user equipment UE, where the information about the access network device includes load information of the access network device or an access tendency of the access network device; the information about the access network device The information is used for the UE to determine the access network of the UE service according to the information of the access network device and the access network selection policy provided by the access network discovery and selection function ANDSF module.

With reference to the twelfth aspect of the present invention, in the first implementation manner of the twelfth aspect of the present invention, the information of the access network device further includes an access factor, and the access factor is used for the UE to generate The random factor of the random factor is compared with the access factor, and the comparison result is obtained. If the comparison result meets the preset rule, the UE selects the access network according to the access tendency indication; if the comparison result does not meet the preset rule rule, the UE waits for a preset time to generate a new random factor again.

The thirteenth aspect of the present invention provides an access network device, including:

The first processor is configured to obtain a service access policy of the user equipment UE, where the service access policy is obtained according to the access network selection policy provided for the UE by the access network discovery and selection function ANDSF module;

The second processor is configured to select an access network for the service of the UE according to the service access policy.

With reference to the thirteenth aspect, in the first implementation manner of the thirteenth aspect of the present invention, the service access policy includes:

Service radio access technology RAT priority;

And/or, information about the access points that the service allows and/or prohibits access to;

And/or, the time information of service permission access and/or access prohibition;

And/or, the address information of service permission access and/or access prohibition.

In combination with the thirteenth aspect or the first implementation manner of the thirteenth aspect, under the second implementation manner of the thirteenth aspect of the present invention, it also includes:

The third processor is configured to obtain the identity of the radio access bearer RAB or the identity of the UE corresponding to the service access policy;

The second processor is specifically configured to: select an access network for services of the UE according to the identity of the RAB or the identity of the UE.

With reference to the thirteenth aspect, under the third implementation mode of the thirteenth aspect of the present invention, it also includes:

A transmitter, configured to send an access indication to the UE, where the access indication carries a service identifier and/or the access network identifier.

With reference to the third implementation manner of the thirteenth aspect of the present invention, in the fourth implementation manner of the thirteenth aspect of the present invention, the access network identifier is an access network type and/or an access point in the access network logo.

With reference to the third implementation manner of the thirteenth aspect of the present invention, in the fifth implementation manner of the thirteenth aspect of the present invention, the transmitter is further configured to: send a command message to the UE, and the command message is used to indicate The UE obeys the command of the network side and cannot decide to access the network by itself.

With reference to the fifth implementation manner of the thirteenth aspect of the present invention, in the sixth implementation manner of the thirteenth aspect of the present invention, the command message is specifically an indication that the network supports a WLAN offload capability.

With reference to the second implementation manner of the thirteenth aspect of the present invention, in the seventh implementation manner of the thirteenth aspect of the present invention, the second processor is specifically configured to:

According to the order of service RAT priorities from high to low, it is judged whether the load of the corresponding network exceeds the preset percentage; if so, the network with the second highest priority is selected as the access network of the UE.

In combination with the second implementation manner of the thirteenth aspect of the present invention, under the eighth implementation manner of the thirteenth aspect of the present invention, it also includes:

a receiver, configured to receive a service access policy sent by a core network device, where the service access policy is generated by the core network according to an access network selection policy provided by the UE or the ANDSF module; or, used to receive The service access policy sent by the UE, the service access policy is generated by the UE according to the access network selection policy provided by the ANDSF module.

A fourteenth aspect of the present invention provides a core network device, including:

The first processor is configured to obtain the access network selection policy provided by the access network discovery and selection function ANDSF module to the user equipment UE;

a second processor, configured to generate a service access policy for the UE according to the access network selection policy;

A transmitter, configured to send the service access policy of the UE to an access network device, so that the access network device selects an access network for the service of the UE according to the service access policy of the UE.

With reference to the fourteenth aspect of the present invention, in the first implementation manner of the fourteenth aspect of the present invention, the service access policy includes:

Service radio access technology RAT priority;

And/or, information about the access points that the service allows and/or prohibits access to;

And/or, the time information of service permission access and/or access prohibition;

And/or, the address information of service permission access and/or access prohibition.

With reference to the fourteenth aspect or the first implementation manner of the fourteenth aspect of the present invention, in the second implementation manner of the fourteenth aspect of the present invention, the transmitter is further configured to send the The radio access bears the identity of the RAB or the identity of the UE to the access network device, so that the access network device selects an access network for the service of the UE according to the identity of the RAB or the identity of the UE.

With reference to the fourteenth aspect of the present invention, in the third implementation manner of the fourteenth aspect of the present invention, the second processor is specifically configured to:

Determine the services carried in each radio access bearer RAB of the UE, and determine the ANDSF strategy corresponding to each service, and generate a service access strategy for the UE according to the ANDSF strategy;

Or, determine the services carried in all RABs of the UE, determine the ANDSF policy corresponding to the service, and generate a service access policy for the UE according to the ANDSF policy.

In combination with the fourteenth aspect of the present invention, under the fourth implementation mode of the fourteenth aspect of the present invention, it also includes:

A receiver, configured to receive the UE's access network selection policy from the ANDSF module; or, used to receive the UE's uploaded access network selection policy, where the UE's uploaded access network selection policy is the UE's access network selection policy from the UE obtained from the ANDSF module.

A fifteenth aspect of the present invention provides a user equipment, including:

a receiver, configured to receive an access network selection indication sent by the access network device;

A first processor, configured to select an access network according to the access network selection indication.

In combination with the fifteenth aspect of the present invention, under the first implementation mode of the fifteenth aspect of the present invention, it also includes:

The second processor is configured to obtain the access network selection policy provided by the access network discovery and selection function ANDSF module;

A third processor, configured to generate a service access policy according to the access network selection policy;

The transmitter is configured to send the generated service access policy to the access network device, so that the access network device selects an access network for the service of the UE according to the service access policy.

With reference to the first implementation manner of the fifteenth aspect of the present invention, in the second implementation manner of the fifteenth aspect of the present invention, the service access policy includes:

Service radio access technology RAT priority;

And/or, information about the access points that the service allows and/or prohibits access to;

And/or, the time information of service permission access and/or access prohibition;

And/or, the address information of service permission access and/or access prohibition.

With reference to the first implementation manner or the second implementation manner of the fifteenth aspect of the present invention, in the third implementation manner of the fifteenth aspect of the present invention, the first transmitter is further configured to connect the service to The radio access bearer RAB identity or UE identity corresponding to the policy is sent to the access network device, so that the access network device selects access for the service of the UE according to the RAB identity or the UE identity network.

With reference to the second implementation manner of the fifteenth aspect of the present invention, in the fourth implementation manner of the fifteenth aspect of the present invention, the third processor is specifically configured to:

Determine the services carried in each radio access bearer RAB of the UE, and determine the ANDSF strategy corresponding to each service, and generate a service access strategy according to the ANDSF strategy;

Or determine the services carried in all RABs of the UE, determine the ANDSF policy corresponding to the service, and generate a service access policy according to the ANDSF policy.

With reference to the first implementation manner of the fifteenth aspect of the present invention, in the sixth implementation manner of the fifteenth aspect of the present invention, the access network selection indication carries a service identifier and/or an access network identifier.

With reference to the sixth implementation manner of the fifteenth aspect of the present invention, in the seventh implementation manner of the fifteenth aspect of the present invention, the access network identifier is an access network type and/or an access point in the access network logo.

With reference to the first implementation manner of the fifteenth aspect of the present invention, in the eighth implementation manner of the fifteenth aspect of the present invention, the receiver is further configured to: receive a command message sent by the access network device, the command The message is used to instruct the UE to obey the command of the network side and not to make its own decision to access the network;

The user equipment further includes: a fourth processor configured to stop network selection according to the ANDSF policy according to the command message, so that the first processor determines an access network according to the access network selection indication.

A sixteenth aspect of the present invention provides a user equipment, including:

A first processor, configured to obtain access network selection policies and access network device information, where the access network selection policies are provided by the access network discovery and selection function ANDSF module for the UE;

The second processor is configured to determine the access network according to the access network selection policy and the information of the access network device.

With reference to the sixteenth aspect of the present invention, in the first implementation manner of the sixteenth aspect of the present invention, the information of the access network device includes: load information of the access network device or access tendency of the access network device.

With reference to the first implementation manner of the sixteenth aspect of the present invention, in the second implementation manner of the sixteenth aspect of the present invention, the access tendency of the access network device includes:

The access network device favors the UE to access the first network, or favors the UE to access the second network, or does not interfere with the UE's access network selection.

With reference to the sixteenth aspect of the present invention, in the third implementation manner of the sixteenth aspect of the present invention, the access network selection policy includes: radio access bearer RAB radio access technology RAT priority, the RAT priority The load threshold of the corresponding access network device when the level takes effect.

With reference to the third implementation manner of the sixteenth aspect of the present invention, in the fourth implementation manner of the sixteenth aspect of the present invention, the second processor is specifically configured to:

Determine the access network selection strategy to be used according to the load information of the access network equipment;

The preferred access network is determined according to the access network selection policy.

With reference to the first implementation manner or the second implementation manner of the sixteenth aspect of the present invention, in the fifth implementation manner of the sixteenth aspect of the present invention, the second processor is specifically configured to:

Among the networks that are allowed to be accessed by the access network selection policy, an access network is selected according to the access tendency indication.

In combination with the fifth implementation manner of the sixteenth aspect of the present invention, under the sixth implementation manner of the sixteenth aspect of the present invention, it also includes:

A third processor, configured to generate a random factor; compare the random factor with the access factor to obtain a comparison result;

If the comparison result meets a preset rule, the second processor selects an access network according to the access tendency indication;

If the comparison result does not comply with the preset rule, the third processor generates a new random factor again after waiting for a preset time.

The seventeenth aspect of the present invention is to provide an access network discovery and selection function ANDSF module, including:

A transmitter, configured to send an access network selection policy to the user equipment UE, where the access network selection policy includes: the radio access technology RAT priority of the service and the load of the corresponding access network device when the RAT priority takes effect Threshold: the access network selection policy is used by the UE to determine the access network of the UE service according to the access network selection policy and the load information of the access network equipment.

The eighteenth aspect of this aspect is to provide an access network device, including:

A transmitter, configured to send information about access network equipment to the user equipment UE, where the information about the access network equipment includes load information of the access network equipment or access tendencies of the access network equipment; the information about the access network equipment The information is used for the UE to determine the access network of the UE service according to the information of the access network device and the access network selection policy provided by the access network discovery and selection function ANDSF module.

With reference to the eighteenth aspect of the present invention, in the first implementation manner of the eighteenth aspect of the present invention, the information of the access network device further includes an access factor, and the access factor is used for the UE to generate The random factor of the random factor is compared with the access factor, and the comparison result is obtained. If the comparison result meets the preset rule, the UE selects the access network according to the access tendency indication; if the comparison result does not meet the preset rule rule, the UE waits for a preset time to generate a new random factor again.

The solution provided by the embodiment of the present invention has the beneficial effect that when the access system controlled by the access network device conflicts with the policy provided by the ANDSF, the most suitable access network can be selected for the UE.

Description of drawings

FIG. 1 is a flowchart of a method for selecting an access network provided in Embodiment 1 of the present invention;

FIG. 2 is a flowchart of a method for selecting an access network provided in Embodiment 2 of the present invention;

FIG. 3 is a flowchart of a method for selecting an access network provided in Embodiment 3 of the present invention;

FIG. 4 is another flow chart of the method for selecting an access network provided in Embodiment 3 of the present invention;

FIG. 5 is a flowchart of a method for selecting an access network according to Embodiment 4 of the present invention;

FIG. 6 is a flowchart of a method for selecting an access network provided in Embodiment 5 of the present invention;

FIG. 7 is a flowchart of a method for selecting an access network according to Embodiment 6 of the present invention;

FIG. 8 is a schematic structural diagram of an access network device provided by Embodiment 7 of the present invention;

FIG. 9 is another schematic structural diagram of an access network device provided in Embodiment 7 of the present invention;

FIG. 10 is a schematic structural diagram of a core network device provided in Embodiment 8 of the present invention;

FIG. 11 is another schematic structural diagram of a core network device provided in Embodiment 8 of the present invention;

FIG. 12 is a schematic structural diagram of a user equipment provided by Embodiment 9 of the present invention;

FIG. 13 is another schematic structural diagram of the user equipment provided by Embodiment 9 of the present invention;

FIG. 14 is a schematic structural diagram of a user equipment provided by Embodiment 10 of the present invention;

FIG. 15 is another schematic structural diagram of the user equipment provided by Embodiment 10 of the present invention;

FIG. 16 is a schematic structural diagram of the ANDSF module provided by Embodiment 11 of the present invention;

FIG. 17 is a schematic structural diagram of an access network device provided by Embodiment 12 of the present invention;

FIG. 18 is a schematic structural diagram of an access network device provided by Embodiment 13 of the present invention;

FIG. 19 is another schematic structural diagram of an access network device provided by Embodiment 13 of the present invention;

FIG. 20 is another schematic structural diagram of the access network device provided by Embodiment 13 of the present invention;

FIG. 21 is another schematic structural diagram of an access network device provided by Embodiment 13 of the present invention;

FIG. 22 is a schematic structural diagram of a core network device provided by Embodiment 14 of the present invention;

FIG. 23 is another schematic structural diagram of a core network device provided by Embodiment 14 of the present invention;

FIG. 24 is a schematic structural diagram of user equipment provided by Embodiment 15 of the present invention;

FIG. 25 is another schematic structural diagram of user equipment provided by Embodiment 15 of the present invention;

FIG. 26 is another schematic structural diagram of the user equipment provided by Embodiment 15 of the present invention;

FIG. 27 is a schematic structural diagram of user equipment provided by Embodiment 16 of the present invention;

FIG. 28 is another schematic structural diagram of user equipment provided by Embodiment 16 of the present invention;

FIG. 29 is a schematic structural diagram of an ANDSF module provided by Embodiment 17 of the present invention;

FIG. 30 is a schematic structural diagram of an access network device provided by Embodiment 18 of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

FIG. 1 is a flowchart of a method for selecting an access network provided in Embodiment 1 of the present invention. As shown in FIG. 1 , the method includes:

101. The access network device obtains a UE's service access policy, and the UE's service access policy is obtained according to the access network selection policy provided by the ANDSF module for the UE.

102. Select an access network for a service of the UE according to a service access policy.

It should be noted here that the service access policy may be an access policy at the radio access bearer (Radio Access Bear, RAB for short) level, or an access policy at the UE level. The UE's service bears access to the network on one or more RABs. For the RAB-level access policy, the RAB identifier corresponds to the service access policy. For the UE-level access policy, the UE's identifier corresponds to the service access policy. Corresponding. For the access policy at the RAB level, the radio access technology (Radio Access Technology, RAT for short) priorities of multiple RABs may be the same or different. For UE-level access policies, the RAT priorities of all RABs carrying UE services are the same. The access policy at the UE level can be mainly used when the UE does not support two or more networks (such as the 3rd Generation Partnership Project ( ^3rd Generation Partner Project, referred to as: 3GPP) and Wireless Local Area Networks (WLANs, Abbreviated as: WLAN)) When transmitting at the same time, the network side cannot carry different RABs with different RAT priorities.

In one embodiment, after step 101, the method may further include: obtaining the RAB identifier or UE identifier corresponding to the service access policy; then step 102 may include: selecting an access service for the UE according to the RAB identifier or UE identifier into the network.

Specifically, the service access policy may include: the RAT priority of the service, the access point information for which the service is allowed to access and/or forbids access; and/or, the time information for which the service is allowed to access and/or forbids access; And/or, the address information of service permission access and/or access prohibition. Wherein, the access strategy for the RAB level may include: the RAT priority of the RAB, the information of the access point that the RAB allows and/or prohibits access; and/or, the time when the RAB allows access and/or prohibits access information; and/or, RAB access-allowed and/or access-denied address information. The access policy at the UE level may include: the RAT priority of the UE, information about the access points for which the UE is permitted to access and/or forbids access; and/or, time information for which the UE is permitted to access and/or forbids access; And/or, the address information of the UE allowing access and/or barring access.

For the above-mentioned RAB-level access policy, the ANDSF policy corresponding to the service can be determined according to the service carried on the RAB, and the RAB-level access policy is generated according to the policy and sent to the access network device. For example, suppose the ANDSF module provides The access network selection strategy is for services with port number 80, which can access the network through 3GPP technology or WLAN technology, and use 3GPP technology to access the network first. However, the CN judges that the service with port number 80 is carried on the RAB with RAB ID=1, then the above-mentioned RAB-level access strategy obtained according to the access network selection strategy is: the RAB with RAB ID=1 preferentially uses 3GPP technology to access the network , and secondly use WLAN technology to access the network.

For the above UE-level access policy, the ANDSF policy corresponding to the service can be determined according to all services carried by the UE, and the UE-level access policy is generated according to the policy and sent to the access network device. For example, suppose the ANDSF module provides The access network selection strategy is for services with port number 80, which can access the network through 3GPP technology or WLAN technology, and use 3GPP technology to access the network first. However, the CN judges that the service with port number 80 is carried on one or more RABs of the UE, then the service access policy of the UE obtained according to the access network selection policy above is: the UE preferentially uses 3GPP technology to access the network, Secondly, use WLAN technology to access the network.

The access network device can obtain the service access policy of the UE in the following different ways:

The first method is: the UE obtains the access network selection policy from the ANDSF module and uploads it to the core network device, and the core network device generates the service access policy of the UE according to the access network selection policy uploaded by the UE and sends it to the access device.

The second method is: the core network device directly obtains the UE's access network selection policy from the ANDSF module, and generates the UE's service access policy according to the UE's access network selection policy and sends it to the access network device.

The third method is: the UE obtains the access network selection policy from the ANDSF module, accesses the network according to the access network selection policy, configures the corresponding RAB for data transmission, and generates the service access policy of the UE according to the access network selection policy to send to access network equipment.

Specifically, in 102, selecting an access network for the UE's service according to the service access policy can specifically be understood as: judging whether the load of the corresponding network exceeds a preset percentage according to the order of the RAT priority of the RAB from high to low, if If it exceeds, select the network with the second highest priority as the access network of the UE. For example, if the load of the network with the highest priority in the service access policy exceeds a preset percentage, select the network with the second highest priority as the access network of the UE; if the load of the network with the second highest priority exceeds the preset percentage, then Select the network with the third highest priority as the UE's access network, and so on. It should be noted that different networks may set the same or different preset percentages, which will not be described here.

On the basis of the above embodiments, after step 102, the method may further include: sending an access indication to the UE, where the access indication may carry a service identifier and/or an access network identifier. The service identifier mentioned here may be a RAB ID, and the RAB ID indicates the RAB targeted for this network access operation, that is, the targeted service. In existing networks, such as 3GPP networks and WLAN networks, if the RAB ID is not carried, there are two understandings: one is that the UE can judge which services to access to the WLAN according to the ANDSF policy; the other is that the UE needs to transfer all services Access to WLAN, this may be due to UE not supporting WLAN and 3GPP parallel transmission. The access network identifier is an identifier indicating the type and/or access point of the access network that the network instructs the UE to access. The type of the access network may be implicitly carried, that is, the type of the access network is implicitly indicated according to a specific message.

On the basis of the above embodiments, before sending the access instruction to the UE, the method may further include: the access network device sends a command message to the UE, the command message is used to instruct the UE to follow the into the network. Specifically, all UEs may be notified in the form of broadcast, or may be notified to a certain UE in a manner of dedicated signaling. In the existing network, the command may specifically be an indication to indicate that the UE follows the command from the network side, or it may be an indication that the network supports the WLAN offload function. According to the capability indication, the UE judges that it cannot decide to access the WLAN network by itself.

Fig. 2 is a flow chart of the method for selecting an access network provided by Embodiment 2 of the present invention. The difference between the method shown in Fig. 2 and the method shown in Fig. 1 is that Fig. 1 describes the entire access network from the perspective of access network equipment The process of network selection, and Figure 2 describes the entire access network selection process from the perspective of core network equipment. Although the angles of description are different, the selection process of the entire access network shown in FIG. 2 is consistent with the process shown in FIG. 1 . As shown in Figure 2, the method includes:

201. The core network device obtains the access network selection policy provided by the ANDSF module to the UE;

202. The core network device generates a service access policy for the UE according to the access network selection policy, and sends the service access policy of the UE to the access network device, so that the access network device provides services for the UE according to the service access policy of the UE Select Access Network.

Specifically, the service access policy may include: the RAT priority of the service, the access point information for which the service is allowed to access and/or forbids access; and/or, the time information for which the service is allowed to access and/or forbids access; And/or, the address information of service permission access and/or access prohibition. It should be noted here that the service access policy may be an access policy at the RAB level, or an access policy at the UE level. For the access policy at the RAB level, the identifier of the RAB corresponds to the service access policy, and for the access policy at the UE level, the identifier of the UE corresponds to the service access policy.

In an implementation manner, the above method may further include: sending the RAB identifier or the UE identifier corresponding to the service access policy to the access network device, so that the access network device is the UE's ID according to the RAB identifier or the UE identifier. The business chooses to access the network.

On the basis of the above embodiments, generating a service access policy for the UE according to the access network selection policy mentioned in 202 may specifically include: determining the services carried in each radio access bearer RAB of the UE, and determining the corresponding The ANDSF strategy generates a service access strategy for the UE according to the ANDSF strategy; or, determines the services carried in all RABs of the UE, and determines the ANDSF strategy corresponding to the service, and generates a service access strategy for the UE according to the ANDSF strategy.

And 201 may specifically include: the core network device receives the UE's access network selection policy from the ANDSF module; or, the core network device receives the access network selection policy uploaded by the UE, and the access network selection policy uploaded by the UE is the UE's Obtained from the ANDSF module.

Fig. 3 is a flow chart of the method for selecting an access network provided by Embodiment 3 of the present invention. The difference between the method shown in Fig. 3 and the method shown in Fig. 1 is that Fig. 1 describes the entire access network from the perspective of access network equipment The process of network selection, and Figure 3 describes the entire access network selection process from the perspective of UE. Although the angles of description are different, the selection process of the entire access network shown in FIG. 3 is consistent with the process shown in FIG. 1 . As shown in Figure 3, the method includes:

301. The UE receives an access network selection instruction sent by an access network device.

302. The UE selects an access network according to the access network selection indication.

In one implementation, the method shown in Figure 4 may also include before 301:

300. The UE obtains the access network selection policy provided by the ANDSF module, generates a service access policy according to the access network selection policy, and sends the generated service access policy to the access network device, so that the access network device accesses the network according to the service The policy selects the access network for the service of the UE.

Specifically, the service access policy may include: the RAT priority of the service, the access point information for which the service is allowed to access and/or forbids access; and/or, the time information for which the service is allowed to access and/or forbids access; And/or, the address information of service permission access and/or access prohibition. It should be noted here that the service access policy may be an access policy at the RAB level, or an access policy at the UE level. For the access policy at the RAB level, the identifier of the RAB corresponds to the service access policy, and for the access policy at the UE level, the identifier of the UE corresponds to the service access policy.

In one embodiment, the method may further include: sending the identity of the radio access bearer RAB or the identity of the UE corresponding to the service access policy to the access network device; making the access network device , to select an access network for the service of the UE.

On the basis of the above embodiments, in 300, generating a service access policy according to the access network selection policy may include: determining the services carried in each radio access bearer RAB of the UE, and determining the ANDSF policy corresponding to each service , generate a service access policy according to the ANDSF policy; or, determine the services carried in all RABs of the UE, determine the ANDSF policy corresponding to the service, and generate the service access policy according to the ANDSF policy.

It should be noted that the access network selection indication mentioned in 301 may carry a service identifier and/or an access network identifier. Wherein, the access network identifier may be an access network type and/or an identifier of an access point in the access network.

Further, the method may also include:

303. The UE receives a command message sent by the access network device. The command message is used to instruct the UE to obey the network side command and not make its own decision to access the network; stop network selection according to the ANDSF policy according to the command message, and select according to the access network Indicates to determine access to the network.

It should be noted here that the order of occurrence of 303 and 300-302 is not limited in this embodiment of the present invention. The access network device can send a command message to the UE at any time.

FIG. 5 is a flowchart of a method for selecting an access network provided in Embodiment 4 of the present invention. As shown in FIG. 5, the method includes:

501. The UE obtains the access network selection policy and access network device information provided by the ANDSF module.

502. Determine an access network according to an access network selection policy and information about access network devices.

Specifically, in 501, the access network selection policy obtained by the UE may include, but is not limited to: the RAT priority of the service, and the corresponding access network device load threshold when the RAT priority takes effect. For example, for a service with a port number of 80, when the RAN load is less than 60%, it can access the network through the 3GPP access technology or the WLAN access technology, and the 3GPP access is preferentially used. For the service with port number 80, when the RAN load is greater than 60%, it can access the network through 3GPP access technology or WLAN access technology, and WLAN access is preferred.

The information of the access network device may include, but is not limited to, two types: one is the load of the access network device, and the other is the access tendency indication of the access network device. The access tendency indication refers to which access network the access network device expects the UE to use preferentially to transmit services, and the RAN can judge according to its own load condition and give a corresponding access tendency indication. For example, the load on the RAN is high, and it is hoped that the UE will preferentially use the WLAN, or the load on the RAN is low, and it is hoped that the UE will preferentially use the 3GPP.

The UE can obtain the information of the access network equipment in the following manner: the RAN notifies all UEs of the information on the RAN side through a broadcast message on a Broadcast Control Channel (Broadcast Control Channel, BCCH for short); Control Channel, referred to as: DCCH), notifies the specific UE of the information on the RAN side through dedicated signaling, and the UE refers to the UE that has reported the ability to support WLAN offloading.

Specifically, in 502, determining the access network according to the access network selection policy and the information of the access network device can be understood as:

If the information of the access network equipment is the load of the access network equipment, determine the available access network selection strategy according to the load of the access network equipment, and then determine the preferred access network according to the available access network selection strategy . For example, if the 3GPP RAN load exceeds 60%, it is judged to use the corresponding access network selection policy according to the load information, and the policy indicates that the UE preferentially uses the WLAN at this time, and the UE will access the WLAN. If the 3GPP RAN load is lower than 60%, it is judged to use the corresponding access network selection policy according to the load information, and the policy indicates that the UE preferentially uses 3GPP at this time, and the UE will not perform WLAN access. It should be noted that different networks may set the same or different preset percentages, which will not be described here.

If the information of the access network device is the access tendency indication of the access network device, the UE will select the access network according to the access tendency indication among the networks allowed by the access network selection policy. The indication of the access tendency includes favoring the UE to use WLAN, favoring the UE to use 3GPP, or not interfering with the UE policy, and so on.

For example, for example, when the ANDSF policy is that the UE uses 3GPP preferentially for the service of port number 80, and selects WLAN secondly. However, at this time, the access tendency on the network side indicates that the UE preferentially uses the WLAN, and the UE will preferentially try to access the WLAN according to the offloading instruction on the network side. If the access preference indicates no preference, according to ANDSF policy selection, if the preference indicates that 3GPP is preferred, even if the ANDSF indicates that the corresponding service 3GPP is of low priority, the UE still prefers to use 3GPP for transmission of this service.

Further, in order to prevent the UE from intensively accessing networks such as WLAN or 3GPP when receiving an access tendency indication, the information of the access network device may also include an access factor. The function of the access factor is: the UE generates a random factor, and compares the random factor with the access factor to determine whether to indicate access according to the access tendency. For example, the access factor is 0.7, and the random factor generated by the UE is 0.6. Since 0.6<0.7, the UE accesses according to the access instruction, otherwise, a new random factor is generated again after a delay.

Fig. 6 is a flowchart of a method for selecting an access network provided in Embodiment 5 of the present invention. The difference between the method shown in Fig. 6 and the method shown in Fig. 5 is that Fig. 5 describes the selection of the entire access network from the perspective of the UE. process, and Figure 6 describes the entire access network selection process from the perspective of the ANDSF module. Although the angles of description are different, the selection process of the entire access network shown in FIG. 6 is consistent with the process shown in FIG. 5 . As shown in Figure 6, the method includes:

601. The ANDSF module sends an access network selection policy to the UE, the access network selection policy includes the RAT priority of the service and the load threshold of the corresponding access network device when the RAT priority takes effect; the access network selection policy is used by the UE The access network of the UE service is determined according to the access network selection policy and the load information of the access network equipment.

Fig. 7 is a flow chart of the method for selecting an access network provided by Embodiment 6 of the present invention. The difference between the method shown in Fig. 7 and the method shown in Fig. 5 is that Fig. 5 describes the selection of the entire access network from the perspective of the UE process, and Figure 7 describes the entire access network selection process from the perspective of access network equipment. Although the angles of description are different, the selection process of the entire access network shown in FIG. 7 is consistent with the process shown in FIG. 5 . As shown in Figure 7, the method includes:

701. The access network device receives the information of the access network device sent by the UE, the information of the access network device includes the load information of the access network device or the access tendency of the access network device; the information of the access network device is used for The UE determines the access network of the UE service according to the information of the access network equipment and the access network selection policy provided by the ANDSF module.

Further, the above access network device information also includes an access factor, and the access factor is used by the UE to compare the generated random factor with the access factor and obtain a comparison result. If the comparison result conforms to the preset rule, then The UE selects an access network according to the access tendency indication; if the comparison result does not meet the preset rules, the UE waits for a preset time and generates a new random factor again.

The access network selection method provided by the embodiment of the present invention generates a service access policy for the UE according to the access network selection policy provided by the ANDSF module, and the UE can access the network according to the service access policy. This dynamic process can make the When the access system controlled by the access network device conflicts with the policy provided by the ANDSF, the most suitable access network can be selected for the UE.

FIG. 8 is a schematic structural diagram of an access network device provided in Embodiment 7 of the present invention. It should be noted that the access network device is one of the execution subjects in the above method embodiment, and its specific work flow can refer to the method embodiment. I won't go into details here. As shown in FIG. 8 , the access network device includes: an obtaining module 801 and a selecting module 802 . Among them, the obtaining module 801 is used to obtain the service access strategy of the user equipment UE, and the service access strategy is obtained according to the access network selection strategy provided by the access network discovery and selection function ANDSF module for the UE; The service access policy selects the access network for the service of the UE.

Among them, the service access strategy includes:

Service radio access technology RAT priority;

And/or, information about the access points that the service allows and/or prohibits access to;

And/or, the time information of service permission access and/or access prohibition;

And/or, the address information of service permission access and/or access prohibition.

In yet another implementation manner, the obtaining module 801 is further configured to: obtain the identity of the radio access bearer RAB corresponding to the service access policy or the identity of the UE; the selection module 802 is also configured to: according to the identity of the RAB or the identity of the UE, for The service of the UE chooses to access the network.

In another implementation manner, as shown in FIG. 9 , another schematic structural diagram of the access network device provided by Embodiment 7 of the present invention, the access network device further includes: a sending module 803, configured to send an access indication to the UE , the access indication carries a service identifier and/or an access network identifier.

Wherein, the access network identifier is an access network type and/or an identifier of an access point in the access network.

On the basis of the embodiment shown in FIG. 9 , the sending module 803 is further configured to: send a command message to the UE, where the command message is used to instruct the UE to obey the network side command and not to make its own decision to access the network.

Wherein, the command message is specifically an indication that the network supports the WLAN offload capability.

In another embodiment, the selection module 802 is specifically configured to: judge whether the load of the corresponding network exceeds a preset percentage according to the order of the RAT priority of the service from high to low; if it exceeds, select the network with the second highest priority as the UE's Connect to the network.

In another embodiment, the obtaining module 801 includes: a first receiving unit, configured to receive the service access policy sent by the core network device, the service access policy is generated by the core network according to the access network selection policy provided by the UE or the ANDSF module or, the second receiving unit is configured to receive the service access policy sent by the UE, the service access policy is generated by the UE according to the access network selection policy provided by the ANDSF module.

Fig. 10 is a schematic structural diagram of a core network device provided in Embodiment 8 of the present invention. It should be noted that the core network device is one of the execution subjects in the above method embodiment, and its specific work flow can refer to the method embodiment. Here I won't go into details. As shown in FIG. 10 , the core network device includes: an obtaining module 1001 and a generating module 1002 . Wherein, the obtaining module 1001 is used to obtain the access network selection strategy provided by the access network discovery and selection function ANDSF module to the user equipment UE; the generating module 1002 is used to generate a service access strategy for the UE according to the access network selection strategy, and The service access policy of the UE is sent to the access network device, so that the access network device selects an access network for the service of the UE according to the service access policy of the UE.

Among them, the service access strategy includes:

Service radio access technology RAT priority;

And/or, information about the access points that the service allows and/or prohibits access to;

And/or, the time information of service permission access and/or access prohibition;

And/or, the address information of service permission access and/or access prohibition.

As shown in FIG. 11 , another schematic structural diagram of the core network equipment provided by Embodiment 8 of the present invention further includes: a sending module 1003, configured to send the identity of the radio access bearer RAB corresponding to the service access policy or the identity of the UE to the The access network device enables the access network device to select an access network for the service of the UE according to the identity of the RAB or the identity of the UE.

In one embodiment, the generating module 1002 specifically includes: a first generating unit, configured to determine the services carried in each radio access bearer RAB of the UE, and determine the ANDSF policy corresponding to each service, and generate a service access bearer for the UE according to the ANDSF policy or, the second generating unit is configured to determine the services carried in all RABs of the UE, and determine the ANDSF policy corresponding to the service, and generate a service access policy for the UE according to the ANDSF policy.

In another embodiment, the obtaining module 1001 includes: a first receiving unit, configured to receive the UE's access network selection policy from the ANDSF module; or a second receiving unit, configured to receive the access network selection policy uploaded by the UE, and the UE The uploaded access network selection policy is obtained by the UE from the ANDSF module.

Fig. 12 is a schematic structural diagram of the user equipment provided by Embodiment 9 of the present invention. It should be noted that the user equipment is one of the execution subjects in the above method embodiments, and its specific work flow can refer to the method embodiments, which will not be described here. repeat. As shown in FIG. 12 , the user equipment includes: a receiving module 1201 and a selecting module 1202 . Wherein, the receiving module 1201 is used for receiving the access network selection instruction sent by the access network device; the selection module 1202 is used for selecting the access network according to the access network selection instruction.

In one implementation manner, as shown in FIG. 13 , another schematic structural diagram of the user equipment provided in Embodiment 9 of the present invention, the user equipment further includes: an obtaining module 1203, configured to obtain an access network discovery and selection function ANDSF module to provide The access network selection strategy; the generation module 1204, used to generate a service access strategy according to the access network selection strategy; the sending module 1205, used to send the generated service access strategy to the access network device, so that the access network device Select an access network for the service of the UE according to the service access policy.

Among them, the service access strategy includes:

Service radio access technology RAT priority;

And/or, information about the access points that the service allows and/or prohibits access to;

And/or, the time information of service permission access and/or access prohibition;

And/or, the address information of service permission access and/or access prohibition.

In one embodiment, the sending module 1205 is further configured to: send the identity of the radio access bearer RAB or the identity of the UE corresponding to the service access policy to the access network device, so that the access network device Identifier, selects the access network for the service of the UE.

In yet another embodiment, the generation module 1204 specifically includes: a first determining unit, configured to determine the services carried in each radio access bearer RAB of the UE, and determine the ANDSF policy corresponding to each service, and generate the service access policy according to the ANDSF policy or, the second determining unit is configured to determine the services carried in all RABs of the UE, and determine the ANDSF policy corresponding to the service, and generate a service access policy according to the ANDSF policy.

Wherein, the access network selection indication carries a service identifier and/or an access network identifier.

Wherein, the access network identifier is an access network type and/or an identifier of an access point in the access network.

In yet another implementation manner, the receiving module 1201 is also configured to: receive a command message sent by the access network device, the command message is used to instruct the UE to obey the command of the network side and not to make its own decision to access the network; the selection module 1202 is specifically configured to: The command message stops network selection according to the ANDSF policy, and determines the access network according to the access network selection instruction.

Fig. 14 is a schematic structural diagram of the user equipment provided by Embodiment 10 of the present invention. It should be noted that the user equipment is one of the execution subjects in the above method embodiments, and its specific work flow can refer to the method embodiments, which will not be described here. repeat. As shown in FIG. 14 , the user equipment includes: an obtaining module 1401 and a determining module 1402 . Among them, the obtaining module 1401 is used to obtain the access network selection strategy and the information of the access network equipment, the access network selection strategy is provided for the UE by the access network discovery and selection function ANDSF module; the determination module 1402 is used to The selection policy and the information of the access network equipment determine the access network.

Wherein, the information of the access network device includes: load information of the access network device or access tendency of the access network device.

Wherein, the access tendency of the access network device includes: the access network device prefers the UE to access the first network, or prefers the UE to access the second network, or does not interfere with the UE's access network selection.

Wherein, the access network selection strategy includes: the RAT priority of the radio access technology that bears the RAB for wireless access, and the load threshold of the corresponding access network device when the RAT priority takes effect.

In one embodiment, the determining module 1402 specifically includes: a first determining unit, configured to determine the access network selection strategy used according to the load information of the access network device; a second determining unit, configured to determine the access network selection strategy according to the access network device load information; Determine the preferred access network to use.

In yet another implementation manner, the determining module 1402 is specifically configured to: select an access network according to the access tendency indication among the networks that are allowed to be accessed by the access network selection policy.

In yet another implementation manner, the information of the access network device also includes the access factor, as shown in FIG. 15 , which is another schematic structural diagram of the user equipment provided in Embodiment 10 of the present invention, and the user equipment further includes: a generating module 1403 , used to generate a random factor; the comparison module 1404 is used to compare the random factor with the access factor to obtain a comparison result; into the network; the generating module 1403 is also used to generate a new random factor again after waiting for a preset time if the comparison result does not meet the preset rules.

FIG. 16 is a schematic structural diagram of the ANDSF module provided by Embodiment 11 of the present invention. It should be noted that the ANDSF module is one of the execution subjects in the above method embodiment, and its specific work flow can refer to the method embodiment, which is not described here. Do repeat. As shown in Figure 16, the ANDSF module includes: a sending module 1601, configured to send an access network selection policy to the user equipment UE, where the access network selection policy includes: the radio access technology RAT priority of the service and when the RAT priority takes effect The load threshold of the corresponding access network device; the access network selection strategy is used for the UE to determine the access network of the UE service according to the access network selection strategy and the load information of the access network device.

Fig. 17 is a schematic structural diagram of the access network device provided by Embodiment 12 of the present invention. It should be noted that the access network device is one of the execution subjects in the above method embodiment, and its specific work flow can refer to the method embodiment , which will not be described here. As shown in FIG. 17, the access network device includes: a sending module 1701, configured to send information of the access network device to the user equipment UE, where the information of the access network device includes load information of the access network device or information of the access network device The access tendency; the information of the access network equipment is used by the UE to determine the access network of the UE service according to the information of the access network equipment and the access network selection policy provided by the access network discovery and selection function ANDSF module.

In one embodiment, the information of the access network device also includes an access factor, and the access factor is used by the UE to compare the generated random factor with the access factor and obtain a comparison result. If the comparison result meets the preset rule, Then the UE selects an access network according to the access tendency indication; if the comparison result does not meet the preset rules, the UE waits for a preset time and generates a new random factor again.

Figure 18 is a schematic structural diagram of the access network device provided by Embodiment 13 of the present invention. It should be noted that the access network device is one of the execution subjects in the above method embodiment, and its specific work flow can refer to the method embodiment , which will not be described here. As shown in FIG. 18 , the access network device includes: a first processor 1801 and a second processor 1802 . Wherein, the first processor 1801 is used to obtain the service access policy of the user equipment UE, and the service access policy is obtained according to the access network selection policy provided by the access network discovery and selection function ANDSF module for the UE; the second processor 1802. Select an access network for the service of the UE according to the service access policy.

Among them, the service access strategy includes:

Service radio access technology RAT priority;

And/or, information about the access points that the service allows and/or prohibits access to;

And/or, the time information of service permission access and/or access prohibition;

And/or, the address information of service permission access and/or access prohibition.

In yet another implementation manner, as shown in FIG. 19 , another schematic structural diagram of the access network device provided by Embodiment 13 of the present invention further includes: a third processor 1803, configured to obtain the wireless network address corresponding to the service access policy. The access bears the identity of the RAB or the identity of the UE; the second processor 1802 is specifically configured to: select an access network for the service of the UE according to the identity of the RAB or the identity of the UE.

In another implementation manner, as shown in FIG. 20 , another schematic structural diagram of the access network device provided by Embodiment 13 of the present invention further includes: a transmitter 1804, configured to send an access indication to the UE, and the access indication carry the service identifier and/or access network identifier.

Wherein, the access network identifier is an access network type and/or an identifier of an access point in the access network.

In yet another implementation manner, the sender 1804 is further configured to: send a command message to the UE, where the command message is used to instruct the UE to obey the network side command and not decide to access the network by itself.

Wherein, the command message is specifically an indication that the network supports the WLAN offload capability.

In one implementation, the second processor 1802 is specifically configured to: judge whether the load of the corresponding network exceeds a preset percentage according to the order of the RAT priority of the service from high to low; if so, select the network with the second highest priority as the UE's access network.

In yet another implementation manner, as shown in FIG. 21 , another schematic structural diagram of the access network device provided by Embodiment 13 of the present invention further includes: a receiver 1805, configured to receive the service access policy sent by the core network device, The service access policy is generated by the core network according to the access network selection policy provided by the UE or the ANDSF module; or, it is used to receive the service access policy sent by the UE, and the service access policy is the access network selection policy provided by the UE according to the ANDSF module generate.

Fig. 22 is a schematic structural diagram of a core network device provided in Embodiment 14 of the present invention. It should be noted that the core network device is one of the execution subjects in the above method embodiment, and its specific work flow can refer to the method embodiment, here I won't go into details here. As shown in FIG. 22 , the core network device includes: a first processor 2201 and a second processor 2202 . Among them, the first processor 2201 is used to obtain the access network selection policy provided by the access network discovery and selection function ANDSF module to the user equipment UE; the second processor 2202 is used to generate a service access policy for the UE according to the access network selection policy. Policy; the first sender 2203 is configured to send the service access policy of the UE to the access network device, so that the access network device selects an access network for the service of the UE according to the service access policy of the UE.

Among them, the service access strategy includes:

Service radio access technology RAT priority;

And/or, information about the access points that the service allows and/or prohibits access to;

And/or, the time information of service permission access and/or access prohibition;

And/or, the address information of service permission access and/or access prohibition.

In one embodiment, the first transmitter 2203 is further configured to send the radio access bearer RAB identifier or UE identifier corresponding to the service access policy to the access network device, so that the access network device The identifier of the UE, which is used to select the access network for the service of the UE.

In yet another embodiment, the second processor 2202 is specifically configured to: determine the services carried in each radio access bearer RAB of the UE, determine the ANDSF policy corresponding to each service, and generate a service access policy for the UE according to the ANDSF policy; or , determine the services carried in all RABs of the UE, and determine the ANDSF policy corresponding to the service, and generate a service access policy for the UE according to the ANDSF policy.

In yet another embodiment, FIG. 23 is a schematic structural diagram of another core network device provided in Embodiment 14 of the present invention, which further includes: a receiver 2204, configured to receive the UE's access network selection policy from the ANDSF module; or , for receiving the access network selection policy uploaded by the UE, the access network selection policy uploaded by the UE is obtained by the UE from the ANDSF module.

Fig. 24 is a schematic structural diagram of the user equipment provided by Embodiment 15 of the present invention. It should be noted that the user equipment is one of the execution subjects in the above method embodiments, and its specific work flow can refer to the method embodiments, which are not described here. Do repeat. As shown in FIG. 24 , the user equipment includes: a receiver 2401 and a first processor 2402 . Wherein, the receiver 2401 is configured to receive the access network selection indication sent by the access network device; the first processor 2402 is configured to select an access network according to the access network selection indication.

In one implementation manner, as shown in FIG. 25 , another schematic structural diagram of the user equipment provided by Embodiment 15 of the present invention further includes: a second processor 2403, configured to obtain the access network discovery and selection function provided by the ANDSF module The access network selection policy; the third processor 2404, configured to generate a service access policy according to the access network selection policy; the sender 2405, configured to send the generated service access policy to the access network device, so that the access The network device selects the access network for the service of the UE according to the service access policy.

Among them, the service access strategy includes:

Service radio access technology RAT priority;

And/or, information about the access points that the service allows and/or prohibits access to;

And/or, the time information of service permission access and/or access prohibition;

And/or, the address information of service permission access and/or access prohibition.

In another embodiment, the sender 2405 is further configured to send the radio access bearer RAB identifier or UE identifier corresponding to the service access policy to the access network device, so that the access network device Identifier, selects the access network for the service of the UE.

In one embodiment, the third processor 2404 is specifically configured to: determine the services carried in each radio access bearer RAB of the UE, determine the ANDSF policy corresponding to each service, and generate a service access policy according to the ANDSF policy; or determine the UE The services carried in all the RABs of the network, determine the ANDSF policy corresponding to the service, and generate a service access policy according to the ANDSF policy.

Wherein, the access network selection indication carries a service identifier and/or an access network identifier.

Wherein, the access network identifier is an access network type and/or an identifier of an access point in the access network.

In yet another implementation manner, as shown in FIG. 26 , which is another schematic structural diagram of the user equipment provided by Embodiment 15 of the present invention, the receiver 2401 is also used to receive a command message sent by the access network device, and the command message is used to indicate The UE obeys the network side order and must not make its own decision to access the network; the fourth processor 2406 is used to stop network selection according to the ANDSF policy according to the command message, so that the first processor 2402 determines the access network according to the access network selection instruction .

Fig. 27 is a schematic structural diagram of the user equipment provided by Embodiment 16 of the present invention. It should be noted that the user equipment is one of the execution entities in the above method embodiments, and its specific work flow can refer to the method embodiments, which are not described here. Do repeat. As shown in FIG. 27 , the user equipment includes: a first processor 2701 and a second processor 2702 . Wherein, the first processor 2701 is used to obtain the access network selection policy and the information of the access network equipment, and the access network selection policy is provided for the UE by the access network discovery and selection function ANDSF module; the second processor 2702 uses The access network is determined according to the access network selection policy and the information of the access network equipment.

Wherein, the information of the access network device includes: load information of the access network device or access tendency of the access network device.

Wherein, the access tendency of the access network device includes: the access network device prefers the UE to access the first network, or prefers the UE to access the second network, or does not interfere with the UE's access network selection.

Wherein, the access network selection strategy includes: the RAT priority of the radio access technology that bears the RAB for wireless access, and the load threshold of the corresponding access network device when the RAT priority takes effect.

In one implementation manner, the second processor 2702 is specifically configured to: determine the access network selection policy to be used according to the load information of the access network device; and determine the preferentially used access network according to the access network selection policy.

In yet another implementation manner, the second processor 2702 is specifically configured to: select an access network according to the access tendency indication among the networks that are allowed to be accessed by the access network selection policy.

In yet another implementation manner, FIG. 28 is another schematic structural diagram of the user equipment provided in Embodiment 16 of the present invention, which further includes: a third processor 2703, configured to generate a random factor; compare the random factor with the access factor Compare to obtain a comparison result; if the comparison result meets the preset rule, the second processor 2702 selects the access network according to the access tendency indication; if the comparison result does not meet the preset rule, the third processor 2703 waits for a preset time and then generates another new random factor.

Fig. 29 is a schematic structural diagram of the ANDSF module provided by the seventeenth embodiment of the present invention. It should be noted that the ANDSF module is one of the executive bodies in the above-mentioned method embodiment, and its specific work flow can refer to the method embodiment, which is not described here. Do repeat. As shown in Figure 29, the ANDSF module includes: a transmitter 2901 for sending an access network selection policy to the user equipment UE, and the access network selection policy includes: the radio access technology RAT priority of the service and the corresponding The load threshold of the access network equipment; the access network selection policy is used by the UE to determine the access network of the UE service according to the access network selection policy and the load information of the access network equipment.

Fig. 30 is a schematic structural diagram of the access network device provided by Embodiment 18 of the present invention. It should be noted that the access network device is one of the execution subjects in the above method embodiment, and its specific work flow can refer to the method embodiment , which will not be described here. As shown in FIG. 30 , the access network device includes: a transmitter 3001 for sending information of the access network device to the user equipment UE, where the information of the access network device includes load information of the access network device or information about the access network device Access tendency: The information of the access network equipment is used by the UE to determine the access network of the UE service according to the information of the access network equipment and the access network selection policy provided by the access network discovery and selection function ANDSF module.

Wherein, the information of the access network device also includes an access factor, and the access factor is used by the UE to compare the generated random factor with the access factor and obtain the comparison result. If the comparison result conforms to the preset rule, the UE will If the comparison result does not meet the preset rules, the UE waits for a preset time and then generates a new random factor again.

Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above-mentioned method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (69)

1. A method for selecting an access network, comprising: The access network device obtains the service access policy of the user equipment UE, and the service access policy is obtained according to the access network selection policy provided for the UE by the access network discovery and selection function ANDSF module; Selecting an access network for the service of the UE according to the service access policy; The service access strategy includes: Service radio access technology RAT priority; And/or, information about the access points that the service allows and/or prohibits access to; And/or, the time information of service permission access and/or access prohibition; And/or, the address information of service permission access and/or access prohibition. 2. The method according to claim 1, characterized in that the method further comprises: Obtain the identity of the radio access bearer RAB or the identity of the UE corresponding to the service access policy; Then the selecting an access network for the service of the UE according to the service access policy includes: Selecting an access network for the service of the UE according to the identity of the RAB or the identity of the UE. 3. The method according to claim 1, characterized in that, after selecting an access network for the service of the UE according to the service access policy, the method further comprises: Sending an access indication to the UE, where the access indication carries a service identifier and/or the access network identifier. 4. The method according to claim 3, wherein the access network identifier is an access network type and/or an identifier of an access point in the access network. 5. The method according to claim 3, wherein before sending the access indication to the UE, the method further comprises: The access network device sends a command message to the UE, where the command message is used to instruct the UE to obey the command of the network side and not to make its own decision to access the network. 6. The method according to claim 5, wherein the command message is specifically an indication that the network supports a WLAN offload capability. 7. The method according to claim 2, wherein the selecting an access network for the service of the UE according to the service access policy comprises: According to the order of service RAT priorities from high to low, it is judged whether the load of the corresponding network exceeds the preset percentage; if so, the network with the second highest priority is selected as the access network of the UE. 8. The method according to claim 1, wherein the access network device obtaining the service access policy of the UE specifically comprises: receiving a service access policy sent by a core network device, where the service access policy is generated by the core network according to an access network selection policy provided by the UE or the ANDSF module; or, Receive the service access policy sent by the UE, the service access policy is generated for the UE according to the access network selection policy provided by the ANDSF module. 9. A method for selecting an access network, comprising: The core network equipment obtains the access network selection policy provided by the access network discovery and selection function ANDSF module to the user equipment UE; Generate a service access policy for the UE according to the access network selection policy, and send the service access policy of the UE to the access network device, so that the access network device accesses according to the service of the UE A policy selects an access network for the service of the UE; The service access strategy includes: Service radio access technology RAT priority; And/or, information about the access points that the service allows and/or prohibits access to; And/or, the time information of service permission access and/or access prohibition; And/or, the address information of service permission access and/or access prohibition. 10. The method according to claim 9, further comprising: sending the radio access bearer RAB identifier or the UE identifier corresponding to the service access policy to the access network device, so that the access network device provides the The service of the UE is selected to access the network. 11. The method according to claim 9, wherein the generating a service access policy for the UE according to the access network selection policy comprises: Determine the services carried in each radio access bearer RAB of the UE, and determine the ANDSF strategy corresponding to each service, and generate a service access strategy for the UE according to the ANDSF strategy; Or, determine the services carried in all RABs of the UE, determine the ANDSF policy corresponding to the service, and generate a service access policy for the UE according to the ANDSF policy. 12. The method according to claim 9, wherein the core network device obtains the access network selection policy provided by the ANDSF module to the UE, comprising: The core network device receives the access network selection policy of the UE from the ANDSF module; Alternatively, the core network device receives the access network selection policy uploaded by the UE, and the access network selection policy uploaded by the UE is obtained by the UE from the ANDSF module. 13. A method for selecting an access network, comprising: The user equipment UE receives the access network selection instruction sent by the access network device; selecting an access network according to the access network selection indication; Before receiving the access network selection instruction sent by the access network device, the method further includes: The UE obtains the access network selection policy provided by the access network discovery and selection function ANDSF module; generating a service access policy according to the access network selection policy; Sending the generated service access policy to the access network device, so that the access network device selects an access network for the service of the UE according to the service access policy; The service access strategy includes: Service radio access technology RAT priority; And/or, information about the access points that the service allows and/or prohibits access to; And/or, the time information of service permission access and/or access prohibition; And/or, the address information of service permission access and/or access prohibition. 14. The method of claim 13, further comprising: sending the radio access bearer RAB identifier or the UE identifier corresponding to the service access policy to the access network device, so that the access network device provides the RAB identifier or the UE identifier for the The service of the UE chooses to access the network. 15. The method according to claim 13, wherein the generating a service access policy according to the access network selection policy comprises: Determine the services carried in each radio access bearer RAB of the UE, and determine the ANDSF strategy corresponding to each service, and generate a service access strategy according to the ANDSF strategy; Or determine the services carried in all RABs of the UE, determine the ANDSF policy corresponding to the service, and generate a service access policy according to the ANDSF policy. 16. The method according to claim 13, wherein the access network selection instruction carries a service identifier and/or an access network identifier. 17. The method according to claim 16, wherein the access network identifier is an access network type and/or an identifier of an access point in the access network. 18. The method of claim 13, further comprising: The UE receives a command message sent by the access network device, and the command message is used to instruct the UE to follow the command of the network side and not to make its own decision to access the network; Stop network selection according to the ANDSF policy according to the command message, and determine an access network according to the access network selection instruction. 19. A method for selecting an access network, comprising: The user equipment UE obtains the access network selection policy and the information of the access network equipment, and the access network selection policy is provided for the UE by the access network discovery and selection function ANDSF module; Determine the access network according to the access network selection strategy and the information of the access network equipment; The information of the access network equipment includes: the access tendency of the access network equipment; The determining the access network according to the access network selection policy and the information of the access network equipment includes: Selecting an access network according to the access tendency among the networks allowed by the access network selection policy; The information of the access network device also includes an access factor, and the method further includes: generate random factors; Comparing the random factor with the access factor to obtain a comparison result; Then the selection of the access network according to the access tendency specifically includes: If the comparison result conforms to a preset rule, select an access network according to the access tendency; If the comparison result does not conform to the preset rule, a new random factor is generated again after waiting for a preset time. 20. The method according to claim 19, wherein the access tendency of the access network device comprises: The access network device favors the UE to access the first network, or favors the UE to access the second network, or does not interfere with the UE's access network selection. 21. The method according to claim 19, wherein the access network selection policy comprises: radio access technology (RAT) priority of radio access bearer RAB, and the corresponding access network when the RAT priority takes effect The load threshold of the device. 22. A method for selecting an access network, comprising: The access network discovery and selection function ANDSF module sends the access network selection policy to the user equipment UE, and the access network selection policy includes: the radio access technology RAT priority of the service and the corresponding access network when the RAT priority takes effect. The load threshold of the network equipment; the access network selection policy is used by the UE to determine the access network of the UE service according to the access network selection policy and the access tendency of the access network equipment. 23. A method for selecting an access network, comprising: The access network device sends the information of the access network device to the user equipment UE, the information of the access network device includes the access tendency of the access network device; the information of the access network device is used by the UE according to the The access tendency of the access network equipment and the access network selection strategy provided by the access network discovery and selection function ANDSF module determine the access network of the UE service; The information of the access network device also includes an access factor, and the access factor is used by the UE to compare the generated random factor with the access factor and obtain a comparison result, if the comparison result meets If the preset rule is used, the UE selects an access network according to the access tendency; if the comparison result does not meet the preset rule, the UE waits for a preset time and generates a new random factor again. 24. An access network device, comprising: An obtaining module, configured to obtain a service access policy of the user equipment UE, where the service access policy is obtained according to the access network selection policy provided by the access network discovery and selection function ANDSF module for the UE; A selection module, configured to select an access network for the service of the UE according to the service access policy; The service access strategy includes: Service radio access technology RAT priority; And/or, information about the access points that the service allows and/or prohibits access to; And/or, the time information of service permission access and/or access prohibition; And/or, the address information of service permission access and/or access prohibition. 25. The access network device according to claim 24, wherein the obtaining module is further configured to: obtain the identity of the radio access bearer RAB or the identity of the UE corresponding to the service access policy; the selection The module is further configured to: select an access network for services of the UE according to the identity of the RAB or the identity of the UE. 26. The access network device according to claim 24, further comprising: a sending module, configured to send an access indication to the UE, the access indication carrying a service identifier and/or the access network identifier. 27. The access network device according to claim 26, wherein the access network identifier is an access network type and/or an identifier of an access point in the access network. 28. The access network device according to claim 26, wherein the sending module is further configured to: send a command message to the UE, the command message is used to instruct the UE to follow the network side command and not to decide its own access into the network. 29. The access network device according to claim 28, wherein the command message is specifically an indication that the network supports a WLAN offload capability. 30. The access network device according to claim 25, wherein the selection module is specifically configured to: judge whether the load of the corresponding network exceeds a preset percentage according to the order of the RAT priority of the service from high to low; If it exceeds, select the network with the second highest priority as the UE's access network. 31. The access network device according to claim 24, wherein the obtaining module comprises: A first receiving unit, configured to receive a service access policy sent by a core network device, where the service access policy is generated by the core network according to an access network selection policy provided by the UE or the ANDSF module; or, The second receiving unit is configured to receive the service access policy sent by the UE, the service access policy is generated by the UE according to the access network selection policy provided by the ANDSF module. 32. A core network device, comprising: An obtaining module, configured to obtain the access network selection strategy provided by the access network discovery and selection function ANDSF module to the user equipment UE; A generating module, configured to generate a service access policy for the UE according to the access network selection policy, and send the service access policy of the UE to an access network device, so that the access network device can The service access policy of the UE selects an access network for the service of the UE; The service access strategy includes: Service radio access technology RAT priority; And/or, information about the access points that the service allows and/or prohibits access to; And/or, the time information of service permission access and/or access prohibition; And/or, the address information of service permission access and/or access prohibition. 33. The core network device according to claim 32, further comprising: A sending module, configured to send the identity of the radio access bearer RAB or the identity of the UE corresponding to the service access policy to the access network device, so that the access network device is used to select an access network for the service of the UE. 34. The core network device according to claim 32, wherein the generating module specifically comprises: The first generation unit is configured to determine the services carried in each radio access bearer RAB of the UE, and determine the ANDSF policy corresponding to each service, and generate a service access policy for the UE according to the ANDSF policy; Alternatively, the second generating unit is configured to determine services carried in all RABs of the UE, determine an ANDSF policy corresponding to the services, and generate a service access policy for the UE according to the ANDSF policies. 35. The core network device according to claim 32, wherein the obtaining module comprises: A first receiving unit, configured to receive the UE's access network selection policy from the ANDSF module; Or the second receiving unit is configured to receive the access network selection policy uploaded by the UE, the access network selection policy uploaded by the UE is obtained by the UE from the ANDSF module. 36. A user equipment UE, characterized by comprising: A receiving module, configured to receive an access network selection instruction sent by the access network device; a selection module, configured to select an access network according to the access network selection indication; The user equipment also includes: An obtaining module, configured to obtain the access network selection strategy provided by the access network discovery and selection function ANDSF module; A generation module, configured to generate a service access strategy according to the access network selection strategy; A sending module, configured to send the generated service access policy to an access network device, so that the access network device selects an access network for the service of the UE according to the service access policy; The service access strategy includes: Service radio access technology RAT priority; And/or, information about the access points that the service allows and/or prohibits access to; And/or, the time information of service permission access and/or access prohibition; And/or, the address information of service permission access and/or access prohibition. 37. The user equipment according to claim 36, wherein the sending module is further configured to: send the identity of the radio access bearer RAB or the identity of the UE corresponding to the service access policy to the access network device so that the access network device selects an access network for the service of the UE according to the identity of the RAB or the identity of the UE. 38. The user equipment according to claim 36, wherein the generating module specifically comprises: The first determining unit is configured to determine the services carried in each radio access bearer RAB of the UE, and determine the ANDSF strategy corresponding to each service, and generate a service access strategy according to the ANDSF strategy; Alternatively, the second determining unit is configured to determine services carried in all RABs of the UE, determine an ANDSF policy corresponding to the services, and generate a service access policy according to the ANDSF policies. 39. The user equipment according to claim 36, wherein the access network selection indication carries a service identifier and/or an access network identifier. 40. The user equipment according to claim 39, wherein the access network identifier is an access network type and/or an identifier of an access point in the access network. 41. The user equipment according to claim 36, wherein the receiving module is further configured to: receive a command message sent by the access network device, the command message is used to instruct the UE to follow the network side command and not make decisions by itself its access network; The selection module is specifically configured to: stop network selection according to the ANDSF policy according to the command message, and determine an access network according to the access network selection instruction. 42. A user equipment UE, characterized by comprising: An obtaining module, configured to obtain access network selection policies and access network device information, where the access network selection policies are provided by the access network discovery and selection function ANDSF module for the UE; A determining module, configured to determine the access network according to the access network selection policy and the information of the access network equipment; The information of the access network equipment includes: the access tendency of the access network equipment; The determining module is specifically further configured to: select an access network according to the access tendency among the networks that are allowed to be accessed by the access network selection policy; The information of the access network device also includes an access factor, and the user equipment further includes: Generation module for generating random factors; A comparison module, configured to compare the random factor with the access factor to obtain a comparison result; Then the determining module is specifically used for: if the comparison result meets the preset rules, select an access network according to the access tendency; the generating module is also used for: if the comparison result does not meet the preset rules, wait for A new random factor is generated again after a preset time. 43. The user equipment according to claim 42, wherein the access tendency of the access network device comprises: The access network device favors the UE to access the first network, or favors the UE to access the second network, or does not interfere with the UE's access network selection. 44. The user equipment according to claim 42, wherein the access network selection policy includes: a radio access technology RAT priority of a radio access bearer RAB, and the corresponding access network when the RAT priority takes effect The load threshold of the network device. 45. An access network discovery and selection function ANDSF module, characterized in that, comprising: A sending module, configured to send an access network selection policy to the user equipment UE, where the access network selection policy includes: the radio access technology RAT priority of the service and the load of the corresponding access network device when the RAT priority takes effect Threshold: the access network selection policy is used by the UE to determine the access network of the UE service according to the access network selection policy and the access tendency of the access network device. 46. An access network device, comprising: A sending module, configured to send information about access network equipment to a user equipment UE, where the information about the access network equipment includes an access tendency of the access network equipment; the information about the access network equipment is used by the UE according to the The access tendency of the access network device and the access network selection policy provided by the access network discovery and selection function ANDSF module determine the access network of the UE service; The information of the access network device also includes an access factor, and the access factor is used by the UE to compare the generated random factor with the access factor and obtain a comparison result, if the comparison result meets If the preset rule is used, the UE selects an access network according to the access tendency; if the comparison result does not meet the preset rule, the UE waits for a preset time and generates a new random factor again. 47. An access network device, comprising: The first processor is configured to obtain a service access policy of the user equipment UE, where the service access policy is obtained according to the access network selection policy provided for the UE by the access network discovery and selection function ANDSF module; a second processor, configured to select an access network for the service of the UE according to the service access policy; The service access strategy includes: Service radio access technology RAT priority; And/or, information about the access points that the service allows and/or prohibits access to; And/or, the time information of service permission access and/or access prohibition; And/or, the address information of service permission access and/or access prohibition. 48. The access network device according to claim 47, further comprising: The third processor is configured to obtain the identity of the radio access bearer RAB or the identity of the UE corresponding to the service access policy; The second processor is specifically configured to: select an access network for services of the UE according to the identity of the RAB or the identity of the UE. 49. The access network device according to claim 47, further comprising: A transmitter, configured to send an access indication to the UE, where the access indication carries a service identifier and/or the access network identifier. 50. The access network device according to claim 49, wherein the access network identifier is an access network type and/or an identifier of an access point in the access network. 51. The access network device according to claim 49, wherein the transmitter is further used for: Sending a command message to the UE, where the command message is used to instruct the UE to obey the command of the network side and not to make its own decision to access the network. 52. The access network device according to claim 51, wherein the command message is specifically an indication that the network supports a WLAN offload capability. 53. The access network device according to claim 48, wherein the second processor is specifically configured to: According to the order of service RAT priorities from high to low, it is judged whether the load of the corresponding network exceeds the preset percentage; if so, the network with the second highest priority is selected as the access network of the UE. 54. The access network device according to claim 47, further comprising: a receiver, configured to receive a service access policy sent by a core network device, where the service access policy is generated by the core network according to an access network selection policy provided by the UE or the ANDSF module; or, used to receive The service access policy sent by the UE, the service access policy is generated by the UE according to the access network selection policy provided by the ANDSF module. 55. A core network device, comprising: The first processor is configured to obtain the access network selection policy provided by the access network discovery and selection function ANDSF module to the user equipment UE; a second processor, configured to generate a service access policy for the UE according to the access network selection policy; A first transmitter, configured to send the service access policy of the UE to an access network device, so that the access network device selects an access network for the service of the UE according to the service access policy of the UE; The service access strategy includes: Service radio access technology RAT priority; And/or, information about the access points that the service allows and/or prohibits access to; And/or, the time information of service permission access and/or access prohibition; And/or, the address information of service permission access and/or access prohibition. 56. The core network device according to claim 55, further comprising: The second sender is configured to send the radio access bearer RAB identifier or the UE identifier corresponding to the service access policy to the access network device, so that the access network device according to the RAB identifier or the The identifier of the UE, and select an access network for the service of the UE. 57. The core network device according to claim 55, wherein the second processor is specifically configured to: Determine the services carried in each radio access bearer RAB of the UE, and determine the ANDSF strategy corresponding to each service, and generate a service access strategy for the UE according to the ANDSF strategy; Or, determine the services carried in all RABs of the UE, determine the ANDSF policy corresponding to the service, and generate a service access policy for the UE according to the ANDSF policy. 58. The core network device according to claim 55, further comprising: A receiver, configured to receive the UE's access network selection policy from the ANDSF module; or, used to receive the UE's uploaded access network selection policy, where the UE's uploaded access network selection policy is the UE's access network selection policy from the UE obtained from the ANDSF module. 59. A user equipment UE, characterized by comprising: a receiver, configured to receive an access network selection indication sent by the access network device; a first processor, configured to select an access network according to the access network selection indication; The user equipment also includes: The second processor is configured to obtain the access network selection policy provided by the access network discovery and selection function ANDSF module; A third processor, configured to generate a service access policy according to the access network selection policy; a transmitter, configured to send the generated service access policy to an access network device, so that the access network device selects an access network for the service of the UE according to the service access policy; The service access strategy includes: Service radio access technology RAT priority; And/or, information about the access points that the service allows and/or prohibits access to; And/or, the time information of service permission access and/or access prohibition; And/or, the address information of service permission access and/or access prohibition. 60. The user equipment according to claim 59, wherein the transmitter is further configured to: send the identity of the radio access bearer RAB or the identity of the UE corresponding to the service access policy to the access network device so that the access network device selects an access network for the service of the UE according to the identity of the RAB or the identity of the UE. 61. The user equipment according to claim 59, wherein the third processor is specifically configured to: Determine the services carried in each radio access bearer RAB of the UE, and determine the ANDSF strategy corresponding to each service, and generate a service access strategy according to the ANDSF strategy; Or determine the services carried in all RABs of the UE, determine the ANDSF policy corresponding to the service, and generate a service access policy according to the ANDSF policy. 62. The user equipment according to claim 59, wherein the access network selection indication carries a service identifier and/or an access network identifier. 63. The user equipment according to claim 62, wherein the access network identifier is an access network type and/or an identifier of an access point in the access network. 64. The user equipment according to claim 59, wherein the receiver is further configured to: receive a command message sent by the access network device, the command message is used to instruct the UE to follow the network side command and not to make decisions by itself its access network; It also includes: a fourth processor, configured to stop network selection according to the ANDSF policy according to the command message, so that the first processor determines an access network according to the access network selection instruction. 65. A user equipment, comprising: A first processor, configured to obtain access network selection policies and access network device information, where the access network selection policies are provided by the access network discovery and selection function ANDSF module for the UE; The second processor is configured to determine the access network according to the access network selection policy and the information of the access network device; The information of the access network equipment includes: the access tendency of the access network equipment; The second processor is specifically also used for: Selecting an access network according to the access tendency among the networks allowed by the access network selection policy; A third processor, configured to generate a random factor; compare the random factor with the access factor to obtain a comparison result; If the comparison result meets a preset rule, the second processor selects an access network according to the access tendency; If the comparison result does not comply with the preset rule, the third processor generates a new random factor again after waiting for a preset time. 66. The user equipment according to claim 65, wherein the access tendency of the access network device comprises: The access network device favors the UE to access the first network, or favors the UE to access the second network, or does not interfere with the UE's access network selection. 67. The user equipment according to claim 65, wherein the access network selection policy includes: radio access technology RAT priority of radio access bearer RAB, and the corresponding access network when the RAT priority takes effect The load threshold of the network device. 68. An access network discovery and selection function ANDSF module, characterized in that it comprises: A transmitter, configured to send an access network selection policy to the user equipment UE, where the access network selection policy includes: the radio access technology RAT priority of the service and the load of the corresponding access network device when the RAT priority takes effect Threshold: the access network selection policy is used by the UE to determine the access network of the UE service according to the access network selection policy and the access tendency of the access network device. 69. An access network device, comprising: a transmitter, configured to send information about access network equipment to a user equipment UE, where the information about the access network equipment includes an access tendency of the access network equipment; the information about the access network equipment is used by the UE according to the The access tendency of the access network device and the access network selection policy provided by the access network discovery and selection function ANDSF module determine the access network of the UE service; The information of the access network device also includes an access factor, and the access factor is used by the UE to compare the generated random factor with the access factor and obtain a comparison result, if the comparison result meets If the preset rule is used, the UE selects an access network according to the access tendency; if the comparison result does not meet the preset rule, the UE waits for a preset time and generates a new random factor again.