CN103369592B - Message transmitting method in packet domain and relevant device - Google Patents

Abstract

The invention discloses a tunnel binding method, a message transmission method in the packet domain and related equipment, comprising: a GGSN receives a calling PDP context activation request from a calling user terminal, and the calling PDP context activation request carries the called PDP context activation request. The terminal identification of the user terminal; and according to the terminal identification of the called user terminal, trigger the called user terminal to initiate the called PDP context activation request; and perform PDP context activation processing for the calling user terminal and the called user terminal, and obtain the calling user terminal The calling GTP tunnel identifier assigned to the user terminal, and the called GTP tunnel identifier assigned to the called user terminal; and establishing a corresponding relationship between the calling GTP tunnel identifier and the called GTP tunnel identifier. Therefore, based on the established corresponding relationship, the packets between user terminals can be transmitted in the packet domain, which improves the efficiency of data transmission between user terminals through the packet domain.

Description

Message transmission method and related equipment in packet domain

technical field

The invention relates to the technical field of wireless communication, in particular to a tunnel binding method, a message transmission method in a packet domain and related equipment.

Background technique

At present, in the GPRS (General Packet Radio Service, General Packet Radio Service) network, through devices such as SGSN (ServingGPRSSupportNode, serving GPRS support node), GGSN (GatewayGPRSSupportNode, gateway GPRS support node) and DNS (DomainNameSystem, domain name system), the Provide IP-based (Internet Protocol, Internet Protocol) packet domain services, the process is as follows:

When a user terminal actively accesses an external packet data network, it first sends a PDP (PacketData Protocol, packet data protocol) context activation request to its own SGSN through the wireless access network, and the SGSN sends information from the DNS according to the information carried in the PDP context activation request. Analyze and obtain the corresponding GGSN, and send the PDP context activation request to the GGSN, and the GGSN performs PDP context activation processing, and establishes a bearer link from the user terminal to the GGSN, so that the user terminal can subsequently use the bearer link Access to external data networks.

According to the existing standard protocol, when the user terminal accesses the packet data network through the GPRS network, a GTP (GPRS Tunnel Protocol, GPRS Tunneling Protocol) tunnel is established for the user terminal from the SGSN to the GGSN. The GTP tunnel is terminated on the GGSN, and the GGSN separates the original message transmitted by the user terminal from the tunnel message received through the GTP tunnel, and forwards it to the packet data network.

In the above scheme where user terminals access the external packet data network through the packet domain core network, one user terminal cannot directly access another user terminal through the packet domain. In order to enable direct communication between user terminals through the packet domain, existing technical solutions It is a way to transfer through a dedicated server, for example:

When sending a multimedia message between user terminals, the multimedia message is delivered to the multimedia message server from the user terminal of the sender through the GPRS core network and the WAP (Wireless Application Protocol, Wireless Application Protocol) gateway, and stored on the multimedia message server, and then notifies the receiver in the form of a short message The user terminal actively downloads and obtains.

In the application of the instant messaging service, the service client on the user terminal must log in to the service server before using it, and register information such as its address and status. The data transmitted between user terminals needs to go through the GPRS core network to reach the service server in the external packet data network, and the service server temporarily stores the data content. After querying the address of the receiving user terminal, it passes through the GPRS core network The data is forwarded to the recipient's user terminal.

In the above-mentioned scheme in which user terminals communicate with each other through a dedicated server in the packet domain, since the data transmitted between user terminals needs to be transferred through a dedicated server, the efficiency of data transmission is reduced.

Contents of the invention

Embodiments of the present invention provide a tunnel binding method, a message transmission method in a packet domain, and related equipment, so as to solve the problem of low data transmission efficiency between user terminals in the packet domain existing in the prior art.

An embodiment of the present invention provides a tunnel binding method, including:

The gateway GPRS support node GGSN receives the calling packet data protocol PDP context activation request of the calling user terminal, and the calling PDP context activation request carries the terminal identifier of the called user terminal;

triggering the called user terminal to initiate a called PDP context activation request according to the terminal identifier of the called user terminal;

Perform PDP context activation processing for the calling user terminal and the called user terminal to obtain the calling GPRS tunnel protocol GTP tunnel identifier allocated for the calling user terminal, and the called user terminal allocated for the called user terminal. Called the GTP tunnel identifier;

Establish a corresponding relationship between the calling GTP tunnel identifier and the called GTP tunnel identifier.

The embodiment of the present invention also provides a packet transmission method in the packet domain based on the corresponding relationship in the tunnel binding method, including:

The GGSN receives the first GTP tunnel message sent by the SGSN through the first GTP tunnel established between the SGSN to which the first user terminal belongs, and the first GTP tunnel message encapsulates the first GTP tunnel message sent by the first user terminal to A packet of a second user terminal; wherein, the first user terminal is the calling user terminal, and the second user terminal is the called user terminal; or, the first user terminal is the called user terminal calling a user terminal, the second user terminal being the calling user terminal;

Obtain a first GTP tunnel identifier of the first GTP tunnel from the first GTP tunnel packet;

Querying the corresponding relationship between the calling GTP tunnel identifier and the called GTP tunnel identifier, and determining the second GTP tunnel identifier corresponding to the obtained first GTP tunnel identifier;

Encapsulate the message encapsulated in the first GTP tunnel message by using the second GTP tunnel identifier to obtain a second GTP tunnel message;

Sending the second GTP tunnel message to the SGSN to which the second user terminal belongs through the second GTP tunnel established with the SGSN to which the second user terminal belongs.

The embodiment of the present invention also provides a message transmission method in the packet domain, including:

The first user terminal receives the first limited broadcast message sent by the second user terminal through the SGSN and GGSN to which the second user terminal belongs, and the SGSN to which the first user terminal belongs, and the first limited broadcast message The source address is the IP address allocated when the PDP context of the second user terminal is activated, and the destination address is a wired broadcast address;

Using the IP address allocated when the PDP context of the second user terminal is activated carried in the first limited broadcast message as a destination address to construct a data message;

Send the constructed data message to the second user terminal through the SGSN to which the first user terminal belongs, the GGSN, and the SGSN to which the second user terminal belongs.

The embodiment of the present invention also provides a gateway GPRS support node GGSN, including:

The first receiving unit is configured to receive a calling packet data protocol PDP context activation request of the calling user terminal, wherein the calling PDP context activation request carries a terminal identifier of the called user terminal;

A first processing unit, configured to trigger the called user terminal to initiate a called PDP context activation request according to the terminal identifier of the called user terminal;

The second processing unit is configured to perform PDP context activation processing for the calling user terminal and the called user terminal, to obtain the calling GPRS tunnel protocol GTP tunnel identifier assigned for the calling user terminal, and for the calling user terminal The called GTP tunnel identifier assigned by the called user terminal;

A binding unit, configured to establish a corresponding relationship between the calling GTP tunnel identifier and the called GTP tunnel identifier.

The embodiment of the present invention also provides a GGSN based on the above correspondence, including:

The second receiving unit is configured to receive the first GTP tunnel message sent by the SGSN through the first GTP tunnel established with the SGSN to which the first user terminal belongs, and the first GTP tunnel message is encapsulated with the A message sent by a first user terminal to a second user terminal; wherein, the first user terminal is the calling user terminal, and the second user terminal is the called user terminal; or, the first The user terminal is the called user terminal, and the second user terminal is the calling user terminal;

An obtaining unit, configured to obtain a first GTP tunnel identifier of the first GTP tunnel from the first GTP tunnel packet;

A query unit, configured to query the correspondence between the calling GTP tunnel ID and the called GTP tunnel ID, and determine the second GTP tunnel ID corresponding to the obtained first GTP tunnel ID;

An encapsulation unit, configured to use the second GTP tunnel identifier to encapsulate the message encapsulated in the first GTP tunnel message to obtain a second GTP tunnel message;

The first sending unit is configured to send the second GTP tunnel message to the SGSN to which the second user terminal belongs via the second GTP tunnel established with the SGSN to which the second user terminal belongs.

The embodiment of the present invention also provides a user terminal, including:

The third receiving unit is configured to receive the first limited broadcast message sent by the second user terminal through the SGSN, GGSN to which the second user terminal belongs, and the SGSN to which the user terminal belongs, the first limited broadcast message The source address is the IP address allocated when the PDP context of the second user terminal is activated, and the destination address is a wired broadcast address;

A first message construction unit, configured to use the IP address allocated when the PDP context of the second user terminal carried in the first limited broadcast message is activated as a destination address to construct a data message;

The second sending unit is configured to send the constructed data message to the second user terminal through the SGSN to which the user terminal belongs, the GGSN, and the SGSN to which the second user terminal belongs.

The beneficial effects of the present invention include:

In the method provided by the embodiment of the present invention, when the calling user terminal is about to perform data transmission with the called user terminal through the packet field, the calling PDP context activation request initiated carries the terminal identifier of the called user terminal, and the core The GGSN in the network triggers the called user terminal to initiate a called PDP context activation request according to the terminal identifier of the called user terminal, and performs PDP context activation processing for the calling user terminal and the called user terminal to obtain the calling user terminal The assigned calling GTP tunnel identifier and the called GTP tunnel identifier assigned to the called user terminal, and establishing a corresponding relationship between the calling GTP tunnel identifier and the called GTP tunnel identifier. Correspondingly, when subsequent data transmission is performed between the calling user terminal and the called user terminal through the packet domain, the GGSN receives the first GTP tunnel established between the SGSN and the SGSN to which the first user terminal as the sender belongs. The first GTP tunnel message sent by the SGSN, the first GTP tunnel message encapsulates the message sent by the first user terminal to the second user terminal as the receiver, and the first GTP tunnel message is obtained from the first GTP tunnel message. The first GTP tunnel identifier of the tunnel, query the above correspondence, determine the second GTP tunnel identifier corresponding to the obtained first GTP tunnel identifier, and use the second GTP tunnel identifier to encapsulate the transmitted message, and obtain the second GTP tunnel identifier. second GTP tunnel message, and then send the second GTP tunnel message to the SGSN to which the second user terminal belongs through the second GTP tunnel established between the SGSN to which the second user terminal belongs, thereby realizing that the second user terminal belongs to The SGSN obtains the message encapsulated in the second GTP tunnel message and forwards it to the second user terminal, which realizes direct data transmission between user terminals through the packet domain. Compared with the existing technology, a dedicated server is no longer needed for transfer , improving the efficiency of data transmission.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, and are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the attached picture:

FIG. 1 is a flowchart of a tunnel binding method provided by an embodiment of the present invention;

FIG. 2 is a flow chart of a method for transmitting packets in a packet domain based on the corresponding relationship established in the above-mentioned tunnel binding method provided by an embodiment of the present invention;

FIG. 3 is a flow chart of the tunnel binding method provided in Embodiment 1 of the present invention;

FIG. 4 is a flowchart of a message transmission method in the packet domain provided in Embodiment 2 of the present invention;

FIG. 5 is a flow chart of a message transmission method in the packet domain provided in Embodiment 3 of the present invention;

FIG. 6 is a schematic structural diagram of the GGSN provided in Embodiment 4 of the present invention;

FIG. 7 is a schematic structural diagram of the GGSN provided in Embodiment 5 of the present invention;

FIG. 8 is a schematic structural diagram of a user terminal provided in Embodiment 6 of the present invention.

detailed description

In order to provide an implementation plan for improving the efficiency of data transmission between user terminals through the packet domain, embodiments of the present invention provide a tunnel binding method, a message transmission method in the packet domain, and related equipment, which are described below in conjunction with the accompanying drawings The preferred embodiments of the present invention are described, and it should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

The embodiment of the present invention provides a tunnel binding method, as shown in Figure 1, including:

Step 101. The GGSN receives a calling PDP context activation request from a calling user terminal, and the calling PDP context activation request carries the terminal identifier of the called user terminal.

Step 102, according to the terminal identifier of the called user terminal, trigger the called user terminal to initiate a called PDP context activation request.

Step 103: Perform PDP context activation processing for the calling user terminal and the called user terminal to obtain the calling GTP tunnel identifier assigned to the calling user terminal and the called GTP tunnel identifier assigned to the called user terminal.

Step 104: Establish a corresponding relationship between the calling GTP tunnel ID and the called GTP tunnel ID.

Correspondingly, based on the corresponding relationship established in the above tunnel binding method, the embodiment of the present invention also provides a packet transmission method in the packet domain, as shown in FIG. 2 , including:

Step 201, the GGSN receives the first GTP tunnel message sent by the SGSN through the first GTP tunnel established between the SGSN to which the first user terminal belongs, and the first GTP tunnel message encapsulates the first GTP tunnel message sent by the first user terminal to the second Messages from two user terminals; wherein, the first user terminal is the calling user terminal, and the second user terminal is the called user terminal; or, the first user terminal is the called user terminal, and the second user terminal is the calling user terminal .

Step 202: Obtain the first GTP tunnel identifier of the first GTP tunnel from the first GTP tunnel packet.

Step 203: Query the corresponding relationship between the calling GTP tunnel ID and the called GTP tunnel ID, and determine the second GTP tunnel ID corresponding to the obtained first GTP tunnel ID.

Step 204: Encapsulate the packet encapsulated in the first GTP tunnel packet by using the second GTP tunnel identifier to obtain the second GTP tunnel packet.

Step 205: Send the second GTP tunnel packet to the SGSN to which the second user terminal belongs through the second GTP tunnel established with the SGSN to which the second user terminal belongs.

The method provided by the present invention will be described in detail below with specific embodiments in conjunction with the accompanying drawings.

Example 1:

FIG. 3 is a flow chart of the tunnel binding party provided in Embodiment 1 of the present invention, specifically including the following processing steps:

Step 301, the calling user terminal sends a PDP context activation request to its own SGSN. For the convenience of distinction, the PDP context activation request is called the calling PDP context activation request, and the calling PDP context activation request carries the called user terminal terminal ID.

Specifically, the terminal identifier of the called user terminal may be carried in the APN (AccessPointName, access point) domain name in the calling PDP context activation request. PSTNnumber) and dedicated access point name.

Step 302, after receiving the calling PDP context activation request, the SGSN to which the calling user terminal belongs obtains the carried APN domain name, and based on the dedicated access point name in the APN domain name, resolves to obtain the corresponding GGSN address, and sends the request to the The GGSN corresponding to the GGSN address forwards the calling PDP context activation request, and carries the terminal identification of the calling user terminal in the forwarded calling PDP context activation request, for example, the MSISDN of the calling user terminal, or IMSI (InternationalMobileSubscriberIdentificationNumber, International Mobile User ID).

In this step, the SGSN may also assign a calling GTP tunnel identifier to the calling user terminal, and send the assigned calling GTP tunnel identifier to the GGSN.

Specifically, when using GTPv1, GTP tunnels are divided into uplink GTP tunnels and downlink GTP tunnels, and correspondingly, GTP tunnel identifiers are divided into uplink GTP tunnel identifiers and downlink GTP tunnel identifiers. Therefore, the SGSN allocates the caller's downlink GTP tunnel identifier , that is, the calling downlink TEID-U; when using GTPv0, there is no distinction between the uplink GTP tunnel and the downlink GTP tunnel, so the calling GTP tunnel identifier assigned by the SGSN is the only GTP tunnel established between the SGSN and the GGSN for the calling user terminal The GTP tunnel ID of the calling party, the calling GTP tunnel ID is also called the calling TID.

Step 303: After receiving the calling user terminal's calling PDP context activation request sent by the SGSN to which the calling user terminal belongs, the GGSN obtains the terminal identification of the called user terminal carried therefrom, and according to the acquired terminal identification , inquire the home location register (HLR) of the SGSN to which the called user terminal belongs.

In this step, the GGSN may also receive the calling GTP tunnel identifier assigned to the calling user terminal sent by the SGSN to which the calling user terminal belongs, and record the calling GTP tunnel identifier.

In this step, the GGSN can also perform other processing procedures based on the received calling PDP context activation request, for example, check the dedicated access point name in the carried APN domain name, etc., which is the processing procedure in the current standard protocol, A detailed description will not be given here.

Step 304, the GGSN sends a PDP context activation notification message to the called user terminal by querying the SGSN to which the called user terminal belongs. The PDP context activation notification message may carry the terminal identifier of the calling user terminal, such as the calling user terminal MSISDN.

Step 305: After receiving the PDP context activation notification message, the called user terminal determines that the calling user terminal intends to perform data transmission with itself through the packet domain, and after determining that the calling user terminal performs data transmission through the packet domain, constructs The own PDP context activation request is called called PDP context activation request for easy distinction, and sends the constructed called PDP context activation request to the SGSN to which it belongs.

Specifically, the terminal identifier of the calling user terminal may be carried in the APN domain name in the called PDP context activation request, for example, the APN domain name is composed of the MSISDN of the calling user terminal and the dedicated access point name.

Step 306: After receiving the called PDP context activation request, the SGSN to which the called user terminal belongs forwards the called PDP context activation request to the GGSN, and carries the called user terminal's ID in the forwarded called PDP context activation request. Terminal identity, for example, the MSISDN or IMSI of the called user terminal.

In this step, the SGSN may also allocate a called GTP tunnel identifier for the called user terminal, and send the allocated called GTP tunnel identifier to the GGSN.

Specifically, when using GTPv1, the SGSN allocates the called downlink GTP tunnel identifier, that is, the called downlink TEID-U; when using GTPv0, the called GTP tunnel identifier allocated by the SGSN is between the GGSN and the called The unique tunnel of the user terminal, the called GTP tunnel identifier is also called called TID.

Step 307, after receiving the calling user terminal's calling PDP context activation request sent by the SGSN to which the calling user terminal belongs, the GGSN obtains the terminal identification of the calling user terminal carried therefrom, thereby determining the calling user terminal's connection with the calling user terminal. The called user terminals all request to activate their respective PDP contexts, and both are ready to perform data transmission with the other party through the packet domain.

Perform PDP context activation processing for the calling user terminal and the called user terminal, such as assigning IP addresses (also called PDP addresses), such as IPv4 addresses, to the calling user terminal and the called user terminal respectively; and for example when using GTPv1 , the calling user terminal will be assigned the calling uplink GTP tunnel identifier, and the called user terminal will be assigned the called uplink GTP tunnel identifier.

For other specific processing flows, reference may be made to the prior art, which will not be described in detail here.

Step 308, after performing the PDP context activation process, the calling user terminal will be assigned the calling GTP tunnel identifier and the called GTP tunnel identifier assigned for the called user terminal. In this step, the calling GTP tunnel identifier will be established. The corresponding relationship between the tunnel ID and the called GTP tunnel ID.

Specifically, when GTPv0 is used, what is obtained is the calling GTP tunnel identifier assigned to the calling user terminal by the SGSN to which the calling user terminal belongs, and the called GTP tunnel identifier assigned to the called user terminal by the SGSN to which the called user terminal belongs. ID, then the corresponding relationship established is the corresponding relationship between the calling GTP tunnel ID and the called GTP tunnel ID.

When GTPv1 is used, what is obtained is the calling user terminal’s belonging SGSN assigns the calling user terminal’s downlink GTP tunnel ID, the GGSN assigns the calling user terminal’s calling uplink GTP tunnel ID, and the called user terminal’s The called downlink GTP tunnel identifier assigned by the SGSN to the called user terminal, and the called uplink GTP tunnel identifier assigned by the GGSN to the called user terminal; correspondingly, when establishing a corresponding relationship, specifically include:

The corresponding relationship between the calling uplink GTP tunnel ID and the called downlink GTP tunnel ID is established, and the corresponding relationship between the called uplink GTP tunnel ID and the calling downlink GTP tunnel ID is established.

Step 309: After the PDP context activation process is performed, return the calling user terminal and the called user terminal respectively to the calling user terminal and the called user terminal, correspondingly return the calling PDP context activation success response and the called PDP context activation success response, and carry the main The IP address assigned to the calling user terminal and the IP address assigned to the called user terminal are used for subsequent message transmission between the calling user terminal and the called user terminal.

Example 2:

After establishing the corresponding relationship of the GTP tunnel identifier between the calling user terminal and the called user terminal through the above tunnel binding method, the message can be transmitted between the calling user terminal and the called user terminal based on the corresponding relationship, Fig. 4 is a message transmission method in the packet domain provided in Embodiment 2 of the present invention, wherein, the calling user terminal may send the message to the called user terminal, or the called user terminal may send the message to the calling user terminal Message, for the convenience of description, the user terminal as the sender is called the first user terminal, and the user terminal as the receiver is called the second user terminal. The message transmission method specifically includes the following processing steps:

Step 401, the first user terminal sends the message to be sent to the second user terminal to the SGSN to which the first user terminal belongs through the currently activated PDP context.

Step 402, after receiving the message sent by the first user terminal, the SGSN to which the first user terminal belongs uses the first GTP tunnel identifier allocated for the first user terminal to encapsulate the received message, Obtain the first GTP tunnel packet.

Specifically, when GTPv1 is adopted, the received message is encapsulated using the first uplink GTP tunnel identifier allocated to the first user terminal to obtain the first uplink GTP tunnel message.

Step 403: The SGSN to which the first user terminal belongs sends a first GTP tunnel message to the GGSN through the first GTP tunnel established with the GGSN and corresponding to the first user terminal.

Specifically, when GTPv1 is adopted, the SGSN to which the first user terminal belongs sends the first uplink GTP tunnel message to the GGSN through the first uplink GTP tunnel established between the GGSN and corresponding to the first user terminal.

Step 404: After receiving the first GTP tunnel packet, the GGSN acquires the first GTP tunnel identifier of the first GTP tunnel therefrom.

Specifically, when GTPv1 is adopted, the first uplink GTP tunnel identifier of the first uplink GTP tunnel is obtained from the received first uplink GTP tunnel message.

In this step, the message to be sent to the second user terminal encapsulated in the first GTP tunnel message may also be obtained.

Step 405, the GGSN queries the established correspondence between the calling GTP tunnel ID and the called GTP tunnel ID, and determines the second GTP tunnel ID corresponding to the obtained first GTP tunnel ID.

Specifically, when GTPv1 is adopted, the corresponding relationship between the established uplink GTP tunnel identifier and the downlink GTP tunnel identifier is queried, and the second downlink GTP tunnel identifier corresponding to the acquired first uplink GTP tunnel identifier is determined.

Step 406: Using the determined second GTP tunnel identifier, perform encapsulation processing on the packet obtained from the first GTP tunnel packet and to be sent to the second user terminal to obtain the second GTP tunnel packet.

Specifically, when GTPv1 is adopted, the determined second downlink GTP tunnel identifier is used to encapsulate the message obtained from the first uplink GTP tunnel message and to be sent to the second user terminal to obtain the second downlink GTP Tunnel packets.

Step 407: Send the obtained second GTP tunnel packet to the SGSN to which the second user terminal belongs through the second GTP tunnel established with the SGSN to which the second user terminal belongs.

Specifically, when GTPv1 is adopted, the obtained second downlink GTP tunnel message is sent to the SGSN to which the second user terminal belongs through the second downlink GTP tunnel established with the SGSN to which the second user terminal belongs.

Step 408: After receiving the second GTP tunnel message, the SGSN to which the second user terminal belongs obtains the carried message to be sent to the second user terminal, and forwards the obtained message to the second user terminal.

Specifically, when GTPv1 is adopted, the received second downlink GTP tunnel message obtains the carried message to be sent to the second user terminal, and forwards the obtained message to the second user terminal.

Through the solutions provided in the above-mentioned embodiment 1 and embodiment 2, when data transmission is performed between user terminals through the packet domain, it no longer needs to be transferred through a dedicated server, but directly performs data transmission through the packet domain, that is, the user terminal The direct communication between them through the packet field improves the efficiency of data transmission.

Moreover, in the existing technology that user terminals communicate through the packet domain, due to the lack of IPv4 address resources, user terminals are usually dynamically assigned private IP addresses in the GPRS core network, and must be translated by NAT (Network Address Translation, Network Address Translation) Only then can it be interconnected with the external packet data network. The dedicated servers are generally located in the external packet data network, and the communication between user terminals in the prior art must involve at least two NAT address translations, resulting in delays in data transmission, increasing the consumption of processing resources, and making many application layers Business functions are limited.

However, by adopting the above solution provided by the embodiment of the present invention, the GGSN can realize the forwarding of the message only according to the established GTP tunnel identifier correspondence, and does not need to resolve the IP address, thereby reducing the delay of data transmission and reducing the processing time. resource consumption.

Example 3:

Based on the requirements of the existing standard protocol for the transmission of data packets in the packet domain, the transmitted data packets need to carry the IP address of the communication peer. In order to meet this requirement, Embodiment 3 of the present invention also proposes a packet A text transmission method, this method is applied to the user terminal side, and based on the GTP tunnel identifier correspondence established in the above-mentioned embodiment 1, and the message transmission method provided in the embodiment 2, as shown in Figure 5, specifically includes the following processing steps :

Step 501. After receiving the PDP context activation success response returned by the GGSN, the first user terminal obtains the IP address assigned to itself from the PDP context activation success response, and uses the assigned IP address as the source address, using limited broadcast The address is used as the destination address to construct the second limited broadcast message.

Step 502: Send the constructed second limited broadcast message to the second user terminal through the SGSN and GGSN to which the first user terminal belongs, and the SGSN to which the second user terminal belongs.

For the specific transmission process of the second limited broadcast message, refer to the process of message transmission between user terminals through the packet domain described in Embodiment 2 above, and no detailed description is given here.

Step 503: After receiving the PDP context activation success response returned by the GGSN, the second user terminal obtains the IP address assigned to itself from the PDP context activation success response, and uses the assigned IP address as the source address, using limited broadcast The address is used as the destination address to construct the first limited broadcast message.

Step 504: Send the constructed first limited broadcast message to the first user terminal through the SGSN and GGSN to which the second user terminal belongs, and the SGSN to which the first user terminal belongs.

For the specific transmission process of the first limited broadcast message, refer to the process of message transmission between user terminals through the packet domain described in Embodiment 2 above, which will not be described in detail here.

There is no strict sequence between the above step 501 and step 502, and the above step 503 and step 504.

Step 505, after receiving the first limited broadcast message sent by the second user terminal, the first user terminal obtains the IP address allocated when the PDP context of the second user terminal is activated, and uses this IP address as the destination address, constructs the required A data packet sent to the second user terminal.

Step 506: Construct the data message to be sent to the second user terminal, and send it to the second user terminal through the SGSN and GGSN to which the first user terminal belongs, and the SGSN to which the second user terminal belongs.

Step 507: After receiving the second limited broadcast message sent by the first user terminal, the second user terminal obtains the IP address allocated when the PDP context of the first user terminal is activated, and uses this IP address as the destination address to construct the required A data packet sent to the first user terminal.

Step 508: Construct the data message to be sent to the first user terminal, and send it to the first user terminal through the SGSN and GGSN to which the second user terminal belongs, and the SGSN to which the first user terminal belongs.

There is no strict sequence between the above step 505 and step 506 and the above step 507 and step 508 .

Example 4:

Based on the same inventive concept, according to the tunnel binding method provided by the above-mentioned embodiments of the present invention, correspondingly, Embodiment 4 of the present invention also provides a gateway GPRS support node GGSN, whose structural diagram is shown in Figure 6, specifically including:

The first receiving unit 601 is configured to receive a calling packet data protocol PDP context activation request of a calling user terminal, wherein the calling PDP context activation request carries a terminal identifier of the called user terminal;

The first processing unit 602 is configured to trigger the called user terminal to initiate a called PDP context activation request according to the terminal identifier of the called user terminal;

The second processing unit 603 is configured to perform PDP context activation processing for the calling user terminal and the called user terminal, obtain the calling GPRS tunnel protocol GTP tunnel identifier allocated for the calling user terminal, and set The called GTP tunnel identifier assigned by the called user terminal;

The binding unit 604 is configured to establish a corresponding relationship between the calling GTP tunnel identifier and the called GTP tunnel identifier.

Further, the first processing unit 602 is specifically configured to query the home location register HLR for the serving GPRS support node SGSN to which the called user terminal belongs according to the terminal identifier of the called user terminal;

Sending a PDP context activation notification message to the called user terminal through the SGSN to which the called user terminal belongs.

Further, the second processing unit 603 is specifically configured to perform PDP context activation processing for the calling user terminal and the called user terminal, and obtain the SGSN to which the calling user terminal belongs to assign the calling user terminal The calling downlink GTP tunnel identifier of the GGSN is the calling uplink GTP tunnel identifier assigned by the calling user terminal, and the SGSN to which the called user terminal belongs is the called downlink GTP tunnel assigned by the called user terminal An identifier, and the called uplink GTP tunnel identifier assigned by the GGSN to the called user terminal;

The binding unit 604 is specifically configured to establish the corresponding relationship between the calling uplink GTP tunnel identifier and the called downlink GTP tunnel identifier, and establish the connection between the called uplink GTP tunnel identifier and the calling downlink GTP tunnel identifier Correspondence.

Example 5:

Based on the same inventive concept, according to the message transmission method in the packet domain provided by the above-mentioned embodiments of the present invention, correspondingly, Embodiment 5 of the present invention also provides a GGSN based on the above-mentioned corresponding relationship, and its structural diagram is shown in FIG. 7 , including:

The second receiving unit 701 is configured to receive the first GTP tunnel message sent by the SGSN through the first GTP tunnel established with the SGSN to which the first user terminal belongs, and the first GTP tunnel message encapsulates the The message sent by the first user terminal to the second user terminal; wherein, the first user terminal is the calling user terminal, and the second user terminal is the called user terminal; or, the first user terminal is the called user terminal; A user terminal is the called user terminal, and the second user terminal is the calling user terminal;

An obtaining unit 702, configured to obtain a first GTP tunnel identifier of the first GTP tunnel from the first GTP tunnel packet;

A query unit 703, configured to query the correspondence between the calling GTP tunnel ID and the called GTP tunnel ID, and determine a second GTP tunnel ID corresponding to the obtained first GTP tunnel ID;

An encapsulating unit 704, configured to use the second GTP tunnel identifier to perform encapsulation processing on the message encapsulated in the first GTP tunnel message to obtain a second GTP tunnel message;

The first sending unit 705 is configured to send the second GTP tunnel packet to the SGSN to which the second user terminal belongs through the second GTP tunnel established with the SGSN to which the second user terminal belongs.

Further, the second receiving unit 701 is specifically configured to receive the first uplink GTP tunnel message sent by the SGSN through the first uplink GTP tunnel established with the SGSN to which the first user terminal belongs;

The obtaining unit 702 is specifically configured to obtain the first uplink GTP tunnel identifier of the first uplink GTP tunnel from the first uplink GTP tunnel message;

The query unit 703 is specifically configured to query the corresponding relationship between the uplink GTP tunnel ID and the downlink GTP tunnel ID, and determine the second downlink GTP tunnel ID corresponding to the obtained first uplink GTP tunnel ID;

The encapsulating unit 704 is specifically configured to use the second downlink GTP tunnel identifier to perform encapsulation processing on the message encapsulated in the first uplink GTP tunnel message to obtain a second downlink GTP tunnel message;

The first sending unit 705 is specifically configured to send the second downlink GTP tunnel message to the SGSN to which the second user terminal belongs through the second downlink GTP tunnel established with the SGSN to which the second user terminal belongs. SGSN.

Embodiment 6:

Based on the same inventive concept, according to the message transmission method in the packet domain provided by the above-mentioned embodiments of the present invention, correspondingly, Embodiment 6 of the present invention also provides a user terminal based on the above-mentioned message transmission method in the packet domain, wherein The structural diagram is shown in Figure 8, specifically including:

The third receiving unit 801 is configured to receive the first limited broadcast message sent by the second user terminal through the SGSN, GGSN to which the second user terminal belongs, and the SGSN to which the user terminal belongs, the first limited broadcast message The source address of the text is the IP address assigned when the PDP context of the second user terminal is activated, and the destination address is a wired broadcast address;

The first message construction unit 802 is configured to use the IP address allocated when the PDP context of the second user terminal carried in the first limited broadcast message is activated as a destination address to construct a data message;

The second sending unit 803 is configured to send the constructed data message to the second user terminal through the SGSN to which the current user terminal belongs, the GGSN, and the SGSN to which the second user terminal belongs.

Further, the above user terminal also includes:

The second message construction unit 804 is configured to use the IP address assigned when the user terminal PDP context is activated as the source address, and use the limited broadcast address as the destination address to construct a second limited broadcast message;

The second sending unit 803 is further configured to send the second limited broadcast message to the second user terminal through the SGSN to which the user terminal belongs, the GGSN, and the SGSN to which the second user terminal belongs .

To sum up, the solution provided by the embodiment of the present invention includes: the GGSN receives the calling PDP context activation request of the calling user terminal, and the calling PDP context activation request carries the terminal identifier of the called user terminal; The terminal identifier of the user terminal triggers the called user terminal to initiate a called PDP context activation request; and performs PDP context activation processing for the calling user terminal and the called user terminal to obtain the calling GTP tunnel identifier assigned to the calling user terminal, and the called GTP tunnel identifier assigned to the called user terminal; and establishing a corresponding relationship between the calling GTP tunnel identifier and the called GTP tunnel identifier.

Correspondingly, when the message is transmitted in the packet domain, it includes: the GGSN receives the first GTP tunnel message sent by the SGSN through the first GTP tunnel established between the SGSN to which the first user terminal belongs, and the first GTP tunnel A message sent by the first user terminal to the second user terminal is encapsulated in the message; wherein, the first user terminal is the calling user terminal, and the second user terminal is the called user terminal; or, the first user terminal is the called user terminal. User terminal, the second user terminal is a calling user terminal; and obtain the first GTP tunnel identifier of the first GTP tunnel from the first GTP tunnel message; and query the corresponding relationship between the calling GTP tunnel identifier and the called GTP tunnel identifier , determining a second GTP tunnel identifier corresponding to the acquired first GTP tunnel identifier; and using the second GTP tunnel identifier, encapsulating the packet encapsulated in the first GTP tunnel message to obtain a second GTP tunnel message; and sending the second GTP tunnel message to the SGSN to which the second user terminal belongs through the second GTP tunnel established with the SGSN to which the second user terminal belongs. By adopting the solutions provided by the embodiments of the present invention, the efficiency of data transmission between user terminals through the packet field is improved.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations.

Claims (12)

1. the message transmitting method in a packet domain, it is characterised in that including:

Gateway GPRS Support Node GGSN receives the caller packet data protocol PDP context activation request of call subscriber terminal, carries the terminal iidentification of called user terminal in the request of described caller PDP context activation；

Terminal iidentification according to described called user terminal, triggers described called user terminal and initiates the request of called PDP context activation；

Carry out PDP context activation process for described call subscriber terminal and described called user terminal, obtain the caller GPRS Tunnel Protocol GTP tunnel mark distributed for described call subscriber terminal, and the called GTP tunnel distributed for described called user terminal identifies；

Set up the corresponding relation of described caller GTP tunnel mark and described called GTP tunnel mark；

The described GGSN the first GTP tunnel by setting up between the SGSN of first user terminal attaching, receives this SGSN the first GTP tunnel message sent, is packaged with described first user terminal and is sent to the message of the second user terminal in described first GTP tunnel message；Wherein, described first user terminal is described call subscriber terminal, and described second user terminal is described called user terminal；Or, described first user terminal is described called user terminal, and described second user terminal is described call subscriber terminal；

The first GTP tunnel mark of described first GTP tunnel is obtained from described first GTP tunnel message；

The described corresponding relation that inquiry caller GTP tunnel mark identifies with called GTP tunnel, it is determined that the second GTP tunnel mark corresponding with the described first GTP tunnel mark obtained；

Use described second GTP tunnel mark, be packaged processing to the described message of encapsulation in described first GTP tunnel message, obtain the second GTP tunnel message；

By the second GTP tunnel set up between the SGSN of described second user terminal ownership, described second GTP tunnel message is sent to the SGSN of described second user terminal ownership。

2. the method for claim 1, it is characterised in that the terminal iidentification according to described called user terminal, triggers described called user terminal and initiates the request of called PDP context activation, specifically include:

Terminal iidentification according to described called user terminal, inquires about the Serving GPRS Support Node SGSN of described called user terminal ownership to attaching position register HLR；

By the SGSN that described called user terminal belongs to, send PDP context activation notification message to described called user terminal。

3. the method for claim 1, it is characterized in that, PDP context activation process is carried out for described call subscriber terminal and described called user terminal, obtain the caller GTP tunnel mark distributed for described call subscriber terminal, identify with the called GTP tunnel distributed for described called user terminal, particularly as follows:

PDP context activation process is carried out for described call subscriber terminal and described called user terminal, obtain the descending GTP tunnel mark of the caller that SGSN is the distribution of described call subscriber terminal of described call subscriber terminal ownership, described GGSN is the up GTP tunnel mark of caller of described call subscriber terminal distribution, the SGSN of described called user terminal ownership is the called descending GTP tunnel mark of described called user terminal distribution, and the called up GTP tunnel mark that described GGSN is the distribution of described called user terminal；

Set up described caller GTP tunnel mark and the corresponding relation of described called GTP tunnel mark, specifically include:

Set up the corresponding relation of described caller up GTP tunnel mark and described called descending GTP tunnel mark, and set up described called up GTP tunnel mark and the corresponding relation of the descending GTP tunnel mark of described caller。

4. the method for claim 1, it is characterised in that the GGSN the first GTP tunnel by setting up between the SGSN of first user terminal attaching, receives this SGSN the first GTP tunnel message sent, particularly as follows:

The GGSN the first up GTP tunnel by setting up between the SGSN of first user terminal attaching, receives this SGSN the first up GTP tunnel message sent；

The first GTP tunnel mark of described first GTP tunnel is obtained from described first GTP tunnel message, particularly as follows:

The first up GTP tunnel mark of described first up GTP tunnel is obtained from described first up GTP tunnel message；

The corresponding relation that inquiry caller GTP tunnel mark identifies with called GTP tunnel, it is determined that the second GTP tunnel mark corresponding with the described first GTP tunnel mark obtained, particularly as follows:

Inquire about the corresponding relation of up GTP tunnel mark and descending GTP tunnel mark, it is determined that the second descending GTP tunnel mark corresponding with the described first up GTP tunnel mark obtained；

Use described second GTP tunnel mark, be packaged processing to the described message of encapsulation in described first GTP tunnel message, obtain the second GTP tunnel message, particularly as follows:

Use described second descending GTP tunnel mark, be packaged processing to the described message of encapsulation in described first up GTP tunnel message, obtain the second descending GTP tunnel message；

By the second GTP tunnel set up between the SGSN of described second user terminal ownership, described second GTP tunnel message is sent to the SGSN of described second user terminal ownership, particularly as follows:

By the second descending GTP tunnel set up between the SGSN of described second user terminal ownership, described second descending GTP tunnel message is sent to the SGSN of described second user terminal ownership。

5. one kind based on the message transmitting method in the packet domain of method described in claim 1, it is characterised in that including:

First user terminal receives second user terminal SGSN by described second user terminal ownership, GGSN, and the SGSN of described first user terminal attaching, the the first limited broadcast message sent, the IP address of distribution when the source address of described first limited broadcast message is described second user terminal PDP context activation, destination address is limited broadcast address；

Use the IP address of distribution during the described second user terminal PDP context activation carried in described first limited broadcast message, as destination address, build data message；

The described data message that will build, by the SGSN of described first user terminal attaching, described GGSN, and the SGSN of described second user terminal ownership, it is sent to described second user terminal。

6. method as claimed in claim 5, it is characterised in that also include:

First user terminal uses the IP address distributed during PDP context activation as source address, uses limited broadcast address as destination address, builds the second limited broadcast message；

By described second limited broadcast message, by the SGSN of described first user terminal attaching, described GGSN, and the SGSN of described second user terminal ownership, it is sent to described second user terminal。

7. a Gateway GPRS Support Node GGSN, it is characterised in that including:

First receives unit, for receiving the caller packet data protocol PDP context activation request of call subscriber terminal, carries the terminal iidentification of called user terminal in the request of described caller PDP context activation；

First processing unit, for the terminal iidentification according to described called user terminal, triggers described called user terminal and initiates the request of called PDP context activation；

Second processing unit, for carrying out PDP context activation process for described call subscriber terminal and described called user terminal, obtain the caller GPRS Tunnel Protocol GTP tunnel mark distributed for described call subscriber terminal, and the called GTP tunnel distributed for described called user terminal identifies；

Binding unit, for setting up the corresponding relation of described caller GTP tunnel mark and described called GTP tunnel mark；

Second receives unit, for the first GTP tunnel set up between the SGSN by first user terminal attaching, receive this SGSN the first GTP tunnel message sent, described first GTP tunnel message is packaged with described first user terminal and is sent to the message of the second user terminal；Wherein, described first user terminal is described call subscriber terminal, and described second user terminal is described called user terminal；Or, described first user terminal is described called user terminal, and described second user terminal is described call subscriber terminal；

Acquiring unit, for obtaining the first GTP tunnel mark of described first GTP tunnel from described first GTP tunnel message；

Query unit, for inquiring about the described corresponding relation of caller GTP tunnel mark and called GTP tunnel mark, it is determined that the second GTP tunnel mark corresponding with the described first GTP tunnel mark obtained；

Encapsulation unit, is used for using described second GTP tunnel mark, is packaged processing to the described message of encapsulation in described first GTP tunnel message, obtains the second GTP tunnel message；

First transmitting element, for the second GTP tunnel by setting up between the SGSN of described second user terminal ownership, is sent to the SGSN of described second user terminal ownership by described second GTP tunnel message。

8. GGSN as claimed in claim 7, it is characterised in that described first processing unit, specifically for the terminal iidentification according to described called user terminal, inquires about the Serving GPRS Support Node SGSN of described called user terminal ownership to attaching position register HLR；

By the SGSN that described called user terminal belongs to, send PDP context activation notification message to described called user terminal。

9. GGSN as claimed in claim 7, it is characterized in that, described second processing unit, specifically for carrying out PDP context activation process for described call subscriber terminal and described called user terminal, obtain the descending GTP tunnel mark of the caller that SGSN is the distribution of described call subscriber terminal of described call subscriber terminal ownership, described GGSN is the up GTP tunnel mark of caller of described call subscriber terminal distribution, the SGSN of described called user terminal ownership is the called descending GTP tunnel mark of described called user terminal distribution, with the called up GTP tunnel mark that described GGSN is the distribution of described called user terminal；

Described binding unit, specifically for setting up the corresponding relation of described caller up GTP tunnel mark and described called descending GTP tunnel mark, and sets up described called up GTP tunnel mark and the corresponding relation of the descending GTP tunnel mark of described caller。

10. GGSN as claimed in claim 7, it is characterised in that described second receives unit, specifically for the first up GTP tunnel set up between the SGSN by first user terminal attaching, receives this SGSN the first up GTP tunnel message sent；

Described acquiring unit, specifically for obtaining the first up GTP tunnel mark of described first up GTP tunnel from described first up GTP tunnel message；

Described query unit, specifically for inquiring about the corresponding relation of up GTP tunnel mark and descending GTP tunnel mark, it is determined that the second descending GTP tunnel mark corresponding with the described first up GTP tunnel mark obtained；

Described encapsulation unit, specifically for using described second descending GTP tunnel mark, is packaged processing to the described message of encapsulation in described first up GTP tunnel message, obtains the second descending GTP tunnel message；

Described first transmitting element, specifically for the second descending GTP tunnel by setting up between the SGSN of described second user terminal ownership, is sent to the SGSN of described second user terminal ownership by described second descending GTP tunnel message。

11. the user terminal based on method described in claim 1, it is characterised in that including:

3rd receives unit, for receiving second user terminal SGSN by described second user terminal ownership, GGSN, and the SGSN of this user terminal ownership, the the first limited broadcast message sent, the IP address of distribution when the source address of described first limited broadcast message is described second user terminal PDP context activation, destination address is limited broadcast address；

First message construction unit, is used for using the IP address of distribution during the described second user terminal PDP context activation carried in described first limited broadcast message, as destination address, builds data message；

Second transmitting element, for the described data message that will build, by the SGSN that this user terminal belongs to, described GGSN, and the SGSN of described second user terminal ownership, it is sent to described second user terminal。

12. user terminal as claimed in claim 11, it is characterised in that also include:

Second message construction unit, is used for using the IP address of distribution during this user terminal PDP context activation as source address, to use limited broadcast address as destination address, build the second limited broadcast message；

Described second transmitting element, is additionally operable to described second limited broadcast message, by the SGSN that this user terminal belongs to, described GGSN, and the SGSN of described second user terminal ownership, it is sent to described second user terminal。