CN101686509B - Base station gateway, method of base station gateway for realizing base station switching, and data processing method - Google Patents

Abstract

The present invention provides a base station gateway, a method for realizing base station handover by the base station gateway, and a data processing method, wherein the base station gateway includes: a storage module for saving the first identifications of the at least two home base stations; an analysis module for using wireless access The network application part protocol analyzes the handover request message sent by the source home base station, and obtains the second identification of the target home base station; the judgment module searches the storage module, determines whether the second identification is one of the first identifications, and obtains a judgment result; The handover control module, when the second identifier is one of the first identifiers, interacts with the source Femtocell and the target Femtocell, and implements handover from the source Femtocell to the target Femtocell by using the wireless access network application part protocol; the forwarding module, When the second identifier is not one of the first identifiers, the handover request message is forwarded to the core network. The base station gateway in the embodiment of the present invention reduces the processing pressure of the core network and reduces the time for handover processing.

Description

Base station gateway, method for realizing base station switching by base station gateway, and data processing method

technical field

The present invention relates to handover technology in UMTS (Universal Mobile Telecommunications System, i.e. Universal Mobile Communication System) and LTE (Long Term Evolution, long-term evolution) network, especially a kind of base station gateway, base station gateway realizes the method and data processing method of base station handover .

Background technique

According to statistics, nearly 70% of the traffic is generated by indoor places. From the current 2G/2.5G network operation experience, mobile users spend 60% of their time indoors. Due to the joint influence of factors such as high data rate, long-distance transmission, and the penetration and fading of wireless signals by buildings, a good network Coverage, especially indoor coverage, is increasingly concerned by operators and manufacturers.

Femtocell (femtocell base station) technology is a solution to expand the indoor coverage of mobile communications. It is suitable for home and office environments. It can transmit voice and data calls from mobile phones to 3G core networks based on standard interfaces. It can be connected to Any existing IP-based transport network.

At present, 3GPP is actively promoting Femtocell in parallel, that is, the progress of standardization of femtocells under the UMTS architecture and the LTE architecture.

Figure 1 shows the existing UMTS architecture, while Figure 2 shows the established 3G Home Node B (3G HNB) architecture. From Figure 1 and Figure 2, in the architecture of 3G HNB, 3G HNB integrates the function of RNC, and there is an Iuh interface between 3G HNB and 3G HNB Gateway (3G HNB Gateway). In addition to supporting the functions of the Iu interface, the Iuh interface also supports 3G HNB registration, UE (User Equipment, user equipment) registration with the HNB, HNB GW discovery and other functions. The 3G HNB GW to the core network side is the Iu interface. Please note that in the traditional UMTS architecture, there is an Iur interface between RNCs, and there is no interface between 3G HNB and GW.

Figure 3 shows the architecture of the Long Term Evolution (LTE), which is flat and IP-based. The access network is composed of eNodeB (evolvede NodeB, evolved NodeB). The eNodeBs are interconnected through the X2 interface in a mesh (mesh) manner, and at the same time, the eNodeBs are connected to the EPC (Evolved Packet Core) through the S1 interface. The S1 interface supports many-to-many MME, S-GW and eNodeB connection relationships.

Femtocells, called Home eNode B (HeNB) in LTE, are also actively discussed. Since a large number of HeNBs are connected to the core network, it brings some security and control considerations, and it is also necessary to introduce network elements similar to 3G HNB GW. At the same time, generally speaking, considering the cost factor, the X2 interface is not set between the HeNBs.

In the 3GPP standard, the concept of CSG (Closed Subscriber Group, Closed Subscriber Group) is introduced for the home base station. That is to say, the mobile user needs permission to access the HNB, and which HNB the mobile user can access is determined by the CSG where the mobile user is located. There are generally two CSG deployment methods, one is single-cell CSG (single-cell CSG), that is, mobile users can only access one home base station. This is a popular CSG deployment method: each family has a femtocell for registered family members or friends to use. According to the registration information, a mobile user can only access one or several HNBs belonging to different CSGs; the other is the multi-cell CSG (multi-cell CSG) mode, that is, several HNBs belong to the same CSG. This multi-cell CSG method is generally deployed in enterprises, campuses and large communities, and mobile users can access several HNBs belonging to the same CSG.

In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art:

In the user plane, since there is no direct interface between HNBs, data may be lost during handover;

In the control plane, due to the prior art, the HNB GW mainly plays the role of centralized processing and distribution of data bearer and signaling bearer in the TNL (Transport Network Layer, transmission network layer) in the HNB architecture. , wireless network layer) is transparently forwarded, which leads to the disadvantages of long processing time and complex signaling interaction with the core network for HNB handover.

In the above description process, UMTS is taken as an example to illustrate the problems existing in the prior art, but the same problems also exist in LTE.

Contents of the invention

The purpose of the embodiments of the present invention is to provide a base station gateway, a method for implementing base station handover by the base station gateway, and a data processing method, which reduce the processing time of the base station handover, and simplify the signaling with the core network during the handover of the base station.

In order to achieve the above purpose, an embodiment of the present invention provides a base station gateway, which manages at least two home base stations belonging to the same multi-cell closed subscriber group, including:

a storage module, configured to store the first identities of the at least two home base stations;

An analysis module, configured to analyze the handover request message sent by the source home base station by using the wireless access network application part protocol, and acquire the second identifier of the target home base station in the handover request;

A judging module, configured to search for the storage module, judge whether the second identifier is one of the first identifiers, and obtain a judgment result;

A handover control module, configured to interact with the source home base station and the target home base station when the judgment result indicates that the second identifier is one of the first identifiers, and realize slave handover from the source home base station to the target home base station;

A forwarding module, configured to forward the handover request message to a core network when the judgment result indicates that the second identifier is not one of the first identifiers.

In the base station gateway above, the home base station is a home base station under Universal Mobile Communications System or an evolved home base station in a long term evolution network.

The above-mentioned base station gateway, wherein the handover control module specifically includes:

A first transceiving unit, configured to receive the handover request message, and send a handover request command to the target home base station after receiving the handover request message;

a channel establishment unit, configured to establish a transmission channel at the transmission network layer with the target home base station;

The second transceiver unit is configured to receive a handover request confirmation message returned by the target home base station after establishing the transmission channel of the transmission network layer, and send a handover command to the source home base station after receiving the handover request confirmation message information;

Based on the handover command message, the source HNB, the UE, and the target HNB interact to implement handover from the source HNB to the target HNB.

The above-mentioned base station gateway, wherein the handover control module further includes:

The third transceiver unit is configured to receive a handover completion message sent by the target home base station after the handover is completed, and send a resource release command to the source home base station after receiving the handover completion message;

Based on the resource release command, the source HNB releases the ALCAP data transmission bearer.

The above-mentioned base station gateway, which also includes:

A data cache module for caching data from the core network;

The first data sending module is configured to send the data buffered in the data caching module to the target Home NodeB after the handover control module receives the handover request confirmation message sent by the target Home NodeB.

The above-mentioned base station gateway, which also includes:

The second data sending module is configured to send the data buffered in the data buffering module to the source home base station until the handover control module receives a handover completion message sent from the target home base station.

The above-mentioned base station gateway, which also includes:

The third data sending module is configured to send the data cached in the data buffering module to the source home base station until the handover control module receives a handover request confirmation message sent from the target home base station.

The above-mentioned base station gateway, which also includes:

The second data sending module is configured to send the data buffered in the data buffering module to the source home base station until the handover control module receives a handover completion message sent from the target home base station;

A third data sending module, configured to send the data cached in the data buffering module to the source home base station until the handover control module receives a handover request confirmation message sent from the target home base station;

The transmission mode selection module is used to trigger the work of the second data sending module and stop the work of the third data sending module when the service type of the data sent to the mobile terminal is a real-time service, otherwise trigger the work of the first data sending module. The third data sending module works, and the second data sending module stops working.

The above-mentioned base station gateway, which also includes:

The notification module is configured to notify the target home base station to establish a buffer to buffer the received downlink data when the service type of the data delivered to the mobile terminal is a real-time service.

In order to achieve the above purpose, an embodiment of the present invention also provides a method for a base station gateway to implement base station handover, where the base station gateway manages at least two home base stations belonging to the same multi-cell closed subscriber group, wherein the method includes:

Step A, the base station gateway uses the wireless access network application part protocol to analyze the handover request message sent by the source home base station, and obtains the second identifier of the target home base station in the handover request;

Step B, the base station gateway searches for the pre-saved first identifiers of the at least two home base stations belonging to the same multi-cell CSG, and judges whether the second identifier is one of the first identifiers, and obtains a judgment result;

Step C, when the judgment result indicates that the second identifier is one of the first identifiers, the base station gateway interacts with the source home base station and the target home base station, and realizes it by using the wireless access network application part protocol Handover from the source HNB to the target HNB, otherwise, forward the handover request message to the core network.

The above method, wherein, the step C specifically includes:

The base station gateway receives the handover request message, and sends a handover request command to the target home base station after receiving the handover request message;

The base station gateway establishes a transmission network layer transmission channel with the target home base station;

The base station gateway receives a handover request confirmation message returned by the target home base station after the transmission channel of the transmission network layer is established;

The base station gateway sends a handover command message to the source home base station, and based on the handover command message, the source home base station, user equipment, and target home base station interact to implement handover from the source home base station to the target home base station .

The above-mentioned method, wherein said step C also includes:

The base station gateway receives the handover completion message sent by the target home base station after the handover is completed, and sends a resource release command to the source home base station, and based on the resource release command, the source home base station releases the access link control Application part data transfer bearer.

The above-mentioned method, wherein, during the processing of the step C, the method further includes:

Step D, the base station gateway caches data from the core network;

Step E, the base station gateway sends the buffered data to the target home base station after receiving the handover request confirmation message sent by the target home base station.

The above-mentioned method, wherein, after the step D, also includes:

Step E1, the base station gateway sends the data cached in the data buffer module to the source home base station until the base station gateway receives a handover completion message sent from the target home base station; or

Step E2, the base station gateway sends the data cached in the data buffer module to the source home base station until the base station gateway receives a handover request confirmation message sent from the target home base station.

In the above method, when the service type of the data from the core network is a real-time service, the step E1 is executed, otherwise, the step E2 is executed.

The above-mentioned method, wherein, after the step E1, also includes:

In step F, the base station gateway notifies the target Femtocell to establish a buffer to buffer the received downlink data.

In order to achieve the above purpose, an embodiment of the present invention also provides a base station gateway, which manages at least two home base stations belonging to the same multi-cell closed subscriber group, including:

A data cache module for caching data from the core network;

A signaling interaction module, configured to perform signaling interaction with the source home base station and the target home base station, so as to realize handover from the source home base station to the target home base station;

The first data sending module is configured to send the data cached in the data caching module to the target Home NodeB after the signaling interaction module receives the handover request confirmation message sent by the target Home NodeB.

The above-mentioned base station gateway, which also includes:

The second data sending module is configured to send the data cached in the data buffering module to the source home base station until the signaling interaction module receives a handover completion message sent from the target home base station; or

The third data sending module is configured to send the data buffered in the data buffering module to the source home base station until the signaling interaction module receives a handover request confirmation message sent from the target home base station.

The above-mentioned base station gateway, which also includes:

The second data sending module is configured to send the data cached in the data buffering module to the source home base station until the signaling interaction module receives a handover completion message sent from the target home base station;

A third data sending module, configured to send the data buffered in the data buffering module to the source home base station until the signaling interaction module receives a handover request confirmation message sent from the target home base station; and

The transmission mode selection module is used to trigger the work of the second data sending module and stop the work of the third data sending module when the service type of the data sent to the mobile terminal is a real-time service, otherwise trigger the work of the first data sending module. The third data sending module works, and the second data sending module stops working.

The above-mentioned base station gateway, which also includes:

The notification module is configured to notify the target home base station to establish a buffer to buffer the received downlink data when the service type of the data delivered to the mobile terminal is a real-time service.

In order to achieve the above purpose, an embodiment of the present invention also provides a data processing method of a base station gateway during base station switching, where the base station gateway manages at least two home base stations belonging to the same multi-cell closed subscriber group, and the method includes:

The base station gateway caches data from the core network;

The base station gateway performs signaling interaction with the source home base station and the target home base station to implement handover from the source home base station to the target home base station;

The base station gateway sends the data cached in the data caching module to the target home base station after receiving the handover request confirmation message sent by the target home base station.

The above method, which also includes:

Step E1, the base station gateway sends the data cached in the data buffer module to the source home base station until the base station gateway receives a handover completion message sent from the target home base station; or

Step E2, the base station gateway sends the data cached in the data buffer module to the source home base station until the base station gateway receives a handover request confirmation message sent from the target home base station.

In the above method, when the service type of the data from the core network is a real-time service, the step E1 is executed, otherwise, the step E2 is executed.

The above-mentioned method, wherein, after the step E1, also includes:

In step F, the base station gateway notifies the target Femtocell to establish a buffer to buffer the received downlink data.

Embodiments of the present invention have the following beneficial effects:

When the base station gateway in the embodiment of the present invention performs handover between the home base stations to which the base station gateway belongs, once it is determined that the home base stations belong to the same CSG, it uses the wireless access network application part protocol to communicate with the source home base station and the target home base station Interaction, to realize the handover from the source home base station to the target home base station. Compared with the existing technology, it no longer needs to interact with the core network. One is to reduce the processing pressure of the core network and reduce the signaling between the core network and the core network. Interaction, at the same time, since there is no need to interact with the core network, the speed of handover processing between the home base stations belonging to the same CSG is greatly accelerated, and the time for handover processing is reduced;

When the method and device of the present invention are switched between 3G home base stations belonging to the same CSG, the 3G home base station gateway sends data to the target 3G home base station as early as possible, reducing the possibility of data packet loss as much as possible, At the same time, stop sending data to the source 3G home base station as late as possible, which reduces the possibility of data packet loss. At the same time, the method of sending data to the source 3G home base station can also be flexible for different business types Selection, while reducing the possibility of data packet loss, occupy as few channel resources as possible.

Description of drawings

Figure 1 is an existing UMTS architecture diagram;

Figure 2 is the architecture diagram of the determined 3G Home Node B (3G HNB);

Fig. 3 is the framework of long-term evolution network (LTE);

FIG. 4 is a schematic diagram of an application scenario of an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a 3G home base station gateway according to an embodiment of the present invention;

6 is a schematic flowchart of a method for implementing base station handover by a base station gateway according to an embodiment of the present invention;

FIG. 7 is a schematic flowchart of step 63 of a method for implementing base station handover by a base station gateway according to an embodiment of the present invention;

Fig. 8 is a schematic flowchart of a data processing method when the 3G home base station gateway executes the 3G home base station according to the embodiment of the present invention.

Detailed ways

In the base station gateway of the embodiment of the present invention, the method for realizing base station switching by the base station gateway and the data processing method, the RNL control signaling analysis and processing module is set at the home base station gateway, which uses RANAP (RadioAccess Network Application Part, wireless access network application part) The function of the mobility anchor is realized, so that the user equipment can realize simple and fast handover of the signaling process between the femtocells under the jurisdiction of the femtocell gateway.

Different from the traditional method of improving indoor coverage, a femtocell is a small wireless base station placed indoors, and its access technology can be GSM, UMTS or even LTE. Currently 3GPP is discussing the standardization of home base stations.

Before describing the embodiments of the present invention in detail, firstly, a multi-cell CSG scenario is described in detail, so as to facilitate a better understanding of the present invention.

Generally speaking, multi-cell CSGs are generally deployed in enterprises, campuses and large communities, and mobile users have the right to use multiple femtocells belonging to the same CSG. These home base stations are adjacent base stations, and are connected to the core network through the home base station gateway.

It is conceivable that users are often mobile in enterprises, campuses, and large communities. In the call state, switching between different HNBs will be involved.

Fig. 4 is a schematic diagram of an application scenario of an embodiment of the present invention, as shown in Fig. 4, wherein, the 3G home base station gateway is connected to three 3G home base stations, namely 3G home base station 1, 3G home base station 2 and 3G home base station Three, and the user equipment is currently in the coverage of the 3G Femtocell 2, and the user equipment is moving towards the 3G Femtocell 1.

The 3G home base station gateway in the embodiment of the present invention manages at least two 3G home base stations, and is applied to a multi-cell CSG. As shown in FIG. 5, the 3G home base station gateway includes:

a storage module, configured to store the first identifiers of the at least two 3G femtocells;

The analysis module is used to analyze the handover request message (Relocation Required) sent by the source 3G home base station by using the wireless access network application part protocol, and obtain the second identification of the target 3G home base station included in the handover request, that is, the user equipment needs The identity of the 3G femtocell to be handed over to;

A judging module, configured to search for the storage module, judge whether the second identifier is one of the first identifiers, and obtain a judgment result;

A handover control module, configured to interact with the source 3G home base station and the target 3G home base station when the judgment result indicates that the second identifier is one of the first identifiers, and use a wireless access network application part protocol Realize the switching of 3G home base stations;

A forwarding module, configured to forward the handover request message to a core network when the judgment result indicates that the second identifier is not one of the first identifiers.

The following takes the situation shown in FIG. 4 as an example to describe in detail.

As shown in Figure 4, the user equipment is currently within the coverage of 3G Home Base Station 2 and is moving towards the direction of 3G Home Base Station 1. location, the 3G Home Base Station 2 will determine that handover is required, and at this time, the 3G Home Base Station 2 sends a handover request message (RelocationRequired) to the 3G Home Base Station gateway, wherein the handover request includes the target 3G Home Base Station (ie 3G Home Base Station 1) the second identifier of .

After the 3G Femtocell gateway receives the handover request message, it analyzes and obtains the second identifier of 3G Femtocell 1. Since its storage module stores the 3G Femtocell 1, 2 and 3 identifiers, it finds that 3G Femtocell 1 belongs to Its jurisdiction, at this time, interacts with the first 3G home base station and the second 3G home base station, and implements switching from the second home base station to the first 3G home base station by using the wireless access network application part protocol.

At this time, the mobile terminal continues to move. When the user equipment moves to a specific location within the common coverage of 3G Home Base Station 1 and 3G Home Base Station X (not under the jurisdiction of the 3G Home Base Station Gateway), 3G Home Base Station 1 will determine that it is necessary to perform Handover, at this time, the 3G home base station sends a handover request message (Relocation Required) to the 3G home base station gateway, wherein the handover request includes the second identification of the target 3G home base station (ie 3G home base station X).

After the 3G Femtocell gateway receives the handover request message, it analyzes and obtains the second identity of 3G Femtocell X. Since its storage module only stores the identity of 3G Femtocell 1, 2, and 3, it finds that 3G Femtocell X is found after searching and comparing. If it does not belong to its jurisdiction, at this time, the switching request message is forwarded to the core network, and the switching of the 3G home base station is completed according to the existing processing flow.

The handover control module in the 3G home base station gateway of the embodiment of the present invention is described in detail below, and the handover control module specifically includes:

The first transceiver unit is used to receive the handover request message, and send a handover request command (Relocation Request) to the target 3G home base station after receiving the handover request message;

A channel establishment unit, configured to establish a transmission channel at the transmission network layer with the target 3G home base station;

The second transceiver unit is used to receive the switch request acknowledgment message (Relocation Request Ack) returned by the target 3G home base station after establishing the transmission channel of the transmission network layer, and after receiving the switch request acknowledgment message, to the source 3G The home base station sends a handover command message (RelocationCommand), and based on the handover command message, the source 3G home base station, user equipment and target 3G home base station interact to realize handover from the source 3G home base station to the target 3G home base station.

At the same time, after the handover is completed, the resources between the source 3G home base station and the mobile device need to be released. Therefore, the handover control module in the embodiment of the present invention also includes:

The third transceiver unit is used to receive the handover completion message (Relocation Complete) sent by the target 3G home base station after the handover is completed, and send an Iu resource release command (Iu Release Command) to the source 3G home base station after receiving the handover completion message , based on the Iu resource release command, the source 3G HNB releases the Iu data transmission bearer.

From the description of the 3G home base station gateway in the embodiment of the present invention, it can be found that in the prior art, the 3G home base station gateway is transparently forwarded at the RNL (Radio Network layer, wireless network layer), so when performing the CSG internal base station handover , needs to be forwarded to the core network for processing, not only the process is cumbersome, but also leads to a long handover time, and the 3G home base station gateway of the embodiment of the present invention can provide the function of a mobile anchor by using RANAP, so it has the following advantages: When performing the handover of the base station inside the CSG, since there is no need to forward it to the core network for processing, the process is simplified, and the time for handover processing is also saved.

The method for the base station gateway in the embodiment of the present invention to implement base station handover is shown in Figure 5, including:

Step 61, the 3G Femtocell gateway analyzes the handover request message (Relocation Required) sent by the source 3G Femtocell by using the wireless access network application part protocol, and obtains the second identity of the target 3G Femtocell included in the handover request, that is, the user equipment The identification of the 3G femtocell to be handed over to;

Step 62: The 3G Femtocell gateway searches for the pre-saved first identifiers of the at least two 3G Femtocells under the jurisdiction of the 3G Femtocell gateway, and judges whether the second identifier is one of the first identifiers, and obtains a judgment result;

Step 63: When the judgment result indicates that the second identifier is one of the first identifiers, the 3G Femtocell gateway interacts with the source 3G Femtocell and the target 3G Femtocell, using the wireless access network application part The protocol realizes the handover of 3G home base stations;

Step 64: When the judgment result indicates that the second identifier is not one of the first identifiers, the 3G Femtocell gateway forwards the handover request message to the core network.

Step 63 is described in detail below, as shown in Figure 7, specifically includes:

Step 631, when the 3G home base station gateway receives the handover request message and analyzes that the target 3G home base station belongs to the jurisdiction, it sends a handover request command (Relocation Request) to the target 3G home base station;

Step 632, the 3G femtocell gateway and the target 3G femtocell establish a transmission channel at the transmission network layer;

Step 633, the 3G Femtocell gateway receives the handover request acknowledgment message (Relocation Request Ack) returned by the target 3G Femtocell after establishing the transmission channel of the transmission network layer;

Step 634, the 3G Femtocell gateway sends a handover command message (Relocation Command) to the source 3G Femtocell, based on the handover command message, the source 3G Femtocell, the user equipment and the target 3G Femtocell interact to realize the relocation from the source 3G Femtocell. Handover from the 3G home base station to the target 3G home base station (for details, refer to the part between step 634 and step 635 in FIG. 7);

Step 635, the 3G Femtocell gateway receives the handover completion message (Relocation Complete) sent by the target 3G Femtocell after the handover is completed;

Step 636, the 3G home base station gateway sends an Iu resource release command (IuRelease Command) to the source 3G home base station;

Step 637: Based on the Iu resource release command, the source 3G HNB interacts with the 3G HNB gateway to release the Iu data transmission bearer.

In step 638, the 3G Femtocell gateway receives the Iu release completion command sent by the source 3G Femtocell, and ends the process.

Of course, in the above-mentioned flow processing process, 3G home base stations (such as HNB and HeNB, etc.) and 3G home base station gateways are used as examples for illustration, but it should be understood that the embodiments of the present invention are also applicable to future All communication systems.

As mentioned in the background technology, since there is no interface similar to Iur or X2 between 3G home base stations on the user plane, data cannot be transmitted on the interface between 3G home base stations, and downlink data may be lost during the handover process. Therefore, the embodiment of the present invention also provides a 3G home base station gateway and a data processing method in the handover process of its 3G home base station.

The 3G home base station gateway of the embodiment of the present invention includes:

A data cache module for caching data from the core network;

A signaling interaction module, configured to perform signaling interaction with a source 3G home base station and a target 3G home base station;

The first data sending module is configured to send the data cached in the data buffering module to the target 3G home base station after the signaling interaction module receives the handover request confirmation message sent by the target 3G home base station.

Because in a specific embodiment of the present invention, once the signaling interaction module receives the handover request confirmation message sent by the target 3G home base station, it indicates that the target 3G home base station has established a data channel with the 3G home base station gateway, and will receive The received data from the core network is sent to the target 3G femtocell, which ensures that the data will not be lost as much as possible.

At the same time, the 3G home base station gateway in the embodiment of the present invention also includes:

The second data sending module is configured to send the data cached in the data buffering module to the source 3G home base station until the signaling interaction module receives a handover completion message sent from the target 3G home base station.

From the above description, it can be found that only after the handover is completed, the sending of data to the source 3G home base station is stopped, which further ensures the integrity of the data in the case of handover failure.

According to the above description, it can be found that for data preservation, in the method adopted in the embodiment of the present invention, once the home base station gateway establishes a transmission network layer transmission channel with the target 3G home base station, it transmits data to the target 3G home base station , at this time, there are two methods for the data transmission of the source 3G femtocell:

Method 1: Once the home base station gateway establishes a transmission channel at the transmission network layer with the target 3G home base station and receives a handover request confirmation message, it stops transmitting data to the source 3G home base station;

Mode 2: The home base station gateway sends the data buffered in the data buffer module to the source 3G home base station until the signaling interaction module receives a handover completion message from the target 3G home base station.

In the second implementation above, since the signaling interaction module does not stop sending downlink data to the source HNB until the signaling interaction module receives the handover completion message sent by the target 3G home base station, therefore, in order to reduce unnecessary data interaction, the present invention implements For example, the following measures are also taken:

After the source 3G home base station receives the handover command message, it sends an L1/L2 handover message to the mobile station. The source 3G home base station will stop receiving and sending the uplink data sent from the mobile station, and stop sending the data from the 3G home base station gateway to the mobile station. incoming downlink data.

Since the above-mentioned data transmission for the source 3G home base station includes two methods, which method is used for transmission, the 3G home base station gateway in the embodiment of the present invention also includes:

A parameter acquisition module, configured to acquire the QoS parameters in the data bearer issued by the core network;

A business type judging module, configured to judge a business type according to the QoS parameter, and obtain a judgment result;

The transmission mode selection module is used to adopt method 2 when the judgment result indicates that the service type is a real-time service, otherwise adopt method 1, that is, select to trigger the work of one of them, and stop the work of the other at the same time.

At the same time, according to the type of transmission service, it can also be determined whether the target 3G home base station needs to set up a cache. Therefore, once the target 3G home base station receives the data sent by the 3G home base station gateway, it will judge the service type according to the QoS parameters in the data bearer. Obtain a judgment result, and when the judgment result indicates that the service type is a real-time service, set the cache to cache the received data; otherwise, do not set the cache.

Of course, the base station gateway may also set up a notification module, which is used to notify the target home base station to establish a buffer to buffer the received downlink data when the service type of the data sent to the mobile terminal is a real-time service.

Here, the size of the cache can be set as required, or it can be a preset empirical value.

The data processing method of the 3G home base station gateway in the embodiment of the present invention when executing the 3G home base station, as shown in FIG. 8 , includes:

Step 81, the 3G femtocell gateway caches data from the core network;

Step 82, acquiring QoS parameters in the data bearer issued by the core network;

Step 83, after the 3G Femtocell gateway receives the handover request confirmation message sent by the target 3G Femtocell, send the cached data to the target 3G Femtocell;

Step 84, judging the service type according to the QoS parameters, and obtaining a judging result;

Step 85, when the judgment result indicates that the service type is a real-time service, the home base station gateway sends the data cached in the data buffer module to the source 3G home base station until the signaling interaction module receives a message from the target 3G home base station. The handover completion message sent by the base station;

Step 86, when the judgment result indicates that the service type is not a real-time service, the Femtocell gateway sends the data buffered in the data buffer module to the source 3G Femtocell until a handover request confirmation message is received.

For the user equipment, when performing soft handover, the user equipment is connected to the source RNC and the destination RNC at the same time.

However, when the mobile station switches between different 3G home base stations, it performs hard handover, that is, it first disconnects from the source 3G home base station, and then connects to the destination 3G home base station. This method increases the data loss of the mobile station. possibility. Similarly, since there is no direct interface between HNBs (Iur interface in UMTS or X2 interface in LTE), data needs to be delivered from the 3G Femtocell gateway to the destination 3G Femtocell instead of being forwarded from the source 3G Femtocell to the destination 3G home base stations, which also increases the possibility of data loss, the method and device of the present invention, when switching between 3G home base stations belonging to the same CSG, the 3G home base station gateway sends data to the target 3G home base station as early as possible The base station reduces the possibility of data packet loss as much as possible, and at the same time, stops sending data to the source 3G home base station as late as possible, which reduces the possibility of data packet loss on the other hand.

For different service types, the way of sending data to the source 3G home base station can also be flexibly selected, while reducing the possibility of data packet loss, occupying as few channel resources as possible.

The above examples are all described using UMTS as an example, but it should be understood that the method and device in the embodiment of the present invention can also be applied to LTE or other mobile communication systems with similar structures. Since the processing methods are the same, The description will not be repeated here.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of the present invention.

Claims (16)

1. A base station gateway, governing at least two home base stations belonging to the same multi-cell closed subscriber group, characterized in that it includes: a storage module, configured to store the first identities of the at least two home base stations; An analysis module, configured to analyze the handover request message sent by the source home base station by using the wireless access network application part protocol, and acquire the second identifier of the target home base station in the handover request; A judging module, configured to search for the storage module, judge whether the second identifier is one of the first identifiers, and obtain a judgment result; A handover control module, configured to interact with the source home base station and the target home base station when the judgment result indicates that the second identifier is one of the first identifiers, and realize slave handover from the source home base station to the target home base station; A forwarding module, configured to forward the handover request message to a core network when the judgment result indicates that the second identifier is not one of the first identifiers. 2. The base station gateway according to claim 1, wherein the home base station is a home base station under Universal Mobile Communications System or an evolved home base station in a long term evolution network. 3. The base station gateway according to claim 1 or 2, wherein the handover control module specifically comprises: A first transceiving unit, configured to receive the handover request message, and send a handover request command to the target home base station after receiving the handover request message; a channel establishment unit, configured to establish a transmission channel at the transmission network layer with the target home base station; The second transceiver unit is configured to receive a handover request confirmation message returned by the target home base station after establishing the transmission channel of the transmission network layer, and send a handover command to the source home base station after receiving the handover request confirmation message information; Based on the handover command message, the source HNB, the UE, and the target HNB interact to implement handover from the source HNB to the target HNB. 4. The base station gateway according to claim 3, wherein the handover control module further comprises: The third transceiver unit is configured to receive a handover completion message sent by the target home base station after the handover is completed, and send a resource release command to the source home base station after receiving the handover completion message; Based on the resource release command, the source HNB releases the ALCAP data transmission bearer. 5. The base station gateway according to claim 1 or 2, further comprising: A data cache module for caching data from the core network; The first data sending module is configured to send the data buffered in the data caching module to the target Home NodeB after the handover control module receives the handover request confirmation message sent by the target Home NodeB. 6. The base station gateway according to claim 5, further comprising: The second data sending module is configured to send the data buffered in the data buffering module to the source home base station until the handover control module receives a handover completion message sent from the target home base station. 7. The base station gateway according to claim 5, further comprising: The third data sending module is configured to send the data cached in the data buffering module to the source home base station until the handover control module receives a handover request confirmation message sent from the target home base station. 8. The base station gateway according to claim 5, further comprising: The second data sending module is configured to send the data buffered in the data buffering module to the source home base station until the handover control module receives a handover completion message sent from the target home base station; A third data sending module, configured to send the data cached in the data buffering module to the source home base station until the handover control module receives a handover request confirmation message sent from the target home base station; The transmission mode selection module is used to trigger the work of the second data sending module and stop the work of the third data sending module when the service type of the data sent to the mobile terminal is a real-time service, otherwise trigger the work of the first data sending module. The third data sending module works, and the second data sending module stops working. 9. The base station gateway according to claim 8, further comprising: The notification module is configured to notify the target home base station to establish a buffer to buffer the received downlink data when the service type of the data delivered to the mobile terminal is a real-time service. 10. A method for a base station gateway to implement base station handover, the base station gateway administering at least two home base stations belonging to the same multi-cell closed subscriber group, characterized in that the method comprises: Step A, the base station gateway uses the wireless access network application part protocol to analyze the handover request message sent by the source home base station, and obtains the second identifier of the target home base station in the handover request; Step B, the base station gateway searches for the pre-saved first identifiers of the at least two home base stations belonging to the same multi-cell CSG, and judges whether the second identifier is one of the first identifiers, and obtains a judgment result; Step C, when the judgment result indicates that the second identifier is one of the first identifiers, the base station gateway interacts with the source home base station and the target home base station, and realizes it by using the wireless access network application part protocol Handover from the source HNB to the target HNB, otherwise, forward the handover request message to the core network. 11. The method according to claim 10, characterized in that, specifically comprising in the step C: The base station gateway receives the handover request message, and sends a handover request command to the target home base station after receiving the handover request message; The base station gateway establishes a transmission network layer transmission channel with the target home base station; The base station gateway receives a handover request confirmation message returned by the target home base station after the transmission channel of the transmission network layer is established; The base station gateway sends a handover command message to the source home base station, and based on the handover command message, the source home base station, user equipment, and target home base station interact to implement handover from the source home base station to the target home base station . 12. method according to claim 11, is characterized in that, also comprises in the described step C: The base station gateway receives the handover completion message sent by the target home base station after the handover is completed, and sends a resource release command to the source home base station, and based on the resource release command, the source home base station releases the access link control Application part data transfer bearer. 13. according to the method described in claim 10 or 11 or 12, it is characterized in that, in the process of described step C, described method also comprises: Step D, the base station gateway caches data from the core network; Step E, the base station gateway sends the buffered data to the target home base station after receiving the handover request confirmation message sent by the target home base station. 14. method according to claim 13, is characterized in that, also comprises after described step D: Step E1, the base station gateway sends the data cached in the data cache module to the source home base station until the base station gateway receives a handover completion message sent from the target home base station; or Step E2, the base station gateway sends the data cached in the data buffer module to the source home base station until the base station gateway receives a handover request confirmation message sent from the target home base station. 15. The method according to claim 14, wherein, when the service type of the data from the core network is a real-time service, the step E1 is executed, otherwise, the step E2 is executed. 16. The method according to claim 15, characterized in that, after the step E1, further comprising: In step F, the base station gateway notifies the target Femtocell to establish a buffer to buffer the received downlink data.

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