CN102752818A - Method and system for processing wireless relay node switching - Google Patents

Abstract

The present invention discloses a processing method and system for switching a wireless relay node. The method includes: a source host base station determines to switch the wireless relay node to a target host base station; The context information is sent to the target donor base station, where the context information of the user equipment managed by the wireless relay node is obtained by the source donor base station from the wireless relay node in advance. The invention can guarantee the accuracy of admission control results.

Description

Processing method and system for wireless relay node handover

technical field

The present invention relates to the communication field, in particular, to a processing method and system for wireless relay node switching.

Background technique

The 3rd Generation Partnership Project (3rd Generation Partnership Project, referred to as 3GPP) long-term evolution (Long-Term Evolution, referred to as LTE) project is the largest new technology research and development project launched by 3GPP in the past two years. Multiplexing (Orthogonal Frequency Division Multiplexing, referred to as OFDM) / frequency division multiple access (Frequency Division Multiple Access, referred to as FDMA) as the core technology can be regarded as "quasi-4G" technology. The main performance goals of the 3GPP LTE project include: providing a peak rate of downlink 100Mbps and uplink 50Mbps in a 20MHz spectrum bandwidth; improving the performance of cell edge users; increasing cell capacity; reducing system delay, and the one-way transmission delay within the user plane is less than 5ms , the transition time of the control plane from sleep state to active state is less than 50ms, and the transition time from resident state to active state is less than 100ms; it supports cell coverage with a radius of 100Km; it can provide access services greater than 100kbps for 350Km/h high-speed mobile users ;Support paired or unpaired spectrum, and can flexibly configure various bandwidths from 1.25MHz to 20MHz.

LTE-A is the abbreviation of LTE-Advanced, which is the subsequent evolution of LTE technology. LTE is commonly known as 3.9G, which shows that the technical indicators of LTE are very close to 4G. Compared with 4G, LTE has reached the requirements of 4G standards except that the maximum bandwidth and uplink peak rate are slightly lower than the requirements of 4G. The overall technical design of LTE-A, which officially brings LTE into 4G, far exceeds the minimum requirements of 4G. In June 2008, 3GPP completed the LTE-A technical requirements report and proposed the minimum requirements for LTE-A: the peak downlink rate is 1Gbps, the peak uplink rate is 500Mbps, and the peak spectrum utilization rate for uplink and downlink reaches 15Mbps/Hz and 30Mbps/Hz respectively. Hz. These parameters are already much higher than the minimum technical requirement indicators of the International Telecommunications Union-Telecommunications standardization sector (ITU-T for short), and have obvious advantages. The key technologies of LTE-A include carrier aggregation, multi-point cooperation, relay transmission, multi-antenna enhancement, wireless relay, self-organizing network, etc.

Among them, wireless relay technology is applied to temporary wireless coverage requirements. For example, due to reasons such as terrain or environment, it is impossible to assume the area connected by the wired backbone network of the common base station, or the area covering dead spots or hot spots. It is costly to set up wired-connected base station equipment to solve this coverage requirement, so wireless relay technology is introduced to solve it.

Fig. 1 is a schematic diagram of a wireless relay node architecture according to related technologies. As shown in Fig. 1, a wireless relay node (RelayNode, RN for short) is connected to a base station of an existing network through a wireless signal, and serves as an User Equipment (UE) provides services to achieve coverage expansion, reduce coverage dead spots, and transfer loads in hotspot areas. The base station wirelessly connected with RN is called Donor eNodeB (DeNB for short), the wireless link between DeNB and RN is called backhaul link, and the air interface between DeNB and RN (air interface for short) ) is called the Un interface. The wireless link between RN and UE is called Access Link, and the air interface between RN and UE is called Uu interface. For the UE served by the RN, the RN acts as an eNB; and for the DeNB connected to the RN, the RN acts as a UE. The downlink data arrives at the DeNB first, and the DeNB transmits the downlink data to the RN, and then the RN transmits the downlink data to the UE, and the transmission of the uplink data is reversed.

Relay nodes can also be used in high-speed mobile scenarios, such as in-vehicle equipment, to provide stable wireless coverage for wireless communication equipment in the vehicle. In this scenario, with the mobility of the vehicle, the relay node will switch between different donor base stations. The handover process can be divided into core network handover (for example, S1 handover) or direct handover (for example, X2 handover) according to the ground-side signaling routing method.

Figure 2 is a flow chart of handover via the core network according to related technologies. As shown in Figure 2, the handover process via the core network can be simply summarized as follows: An interface (such as S1) sends a handover request command to the core network, and the command carries context information of the UE. After receiving the command, the core network judges the location of the target base station based on the information carried in the command, and sends a handover request to the target base station. The target base station reads the context information of the UE therein, and performs admission control on the UE. After the target base station judges that the UE can be accessed, it returns a handover request confirmation message to the core network, and the core network forwards it to the source base station to start the handover process of the UE on the air interface.

Fig. 3 is a flow chart of a handover via a direct interface according to related technologies. As shown in Fig. 3, the direct handover process can be simply summarized as follows: when the source base station judges that a UE needs to initiate a handover according to the measurement report of the UE, the direct interface between the base stations ( For example, X2) Send a handover request command to the target base station, and the command carries context information of the UE. The target base station reads the information therein and performs admission control on the UE. After judging that the UE can be accessed, it replies a response message to the source base station, and the source base station starts the handover process of the UE on the air interface.

In the above handover process, regardless of whether it is handover via the core network or direct handover, the context information of the UE in the source base station will be carried in the handover request command, and the context information includes: the UE's Cell Radio Network Temporary Identifier (Cell Radio Network Temporary Identifier, referred to as C-RNTI), UE measurement configuration, signaling radio bearer (Signaling Radio Bearer, referred to as SRB) configuration, data radio bearer (Data Radio Bearer, referred to as DRB) configuration, UE capabilities and other information. The target base station needs to judge whether to allow UE access based on the above information and its own configuration and radio resource status. This process is also called admission control (Admission Control).

However, in scenarios such as vehicles, the relay node moves at the same time as the terminal under its jurisdiction. At this time, if the target host base station only performs admission control based on the context of the relay node, the admission control result will be inaccurate.

Contents of the invention

The present invention is proposed to solve the problem in the related art that the target host base station only performs admission control according to the context of the wireless relay node. Therefore, the main purpose of the present invention is to provide a processing method and system for wireless relay node handover to solve above question.

In order to achieve the above purpose, according to an embodiment of the present invention, a processing method for wireless relay node handover is provided.

The processing method for wireless relay node handover according to the present invention includes: the source donor base station determines to switch the wireless relay node to the target donor base station; the source donor base station sends the context information of the user equipment under the jurisdiction of the wireless relay node to the target donor base station , wherein the context information of the user equipment managed by the wireless relay node is obtained by the source donor base station from the wireless relay node in advance.

Preferably, after the source donor base station sends the context information of the user equipment managed by the wireless relay node to the target donor base station, the above method further includes: the target donor base station receives the context information of the user equipment managed by the wireless relay node; The target donor base station performs admission control on the user equipment under the jurisdiction of the wireless relay node according to the context information.

Preferably, the target donor base station performs admission control on the user equipment managed by the wireless relay node according to the context information, including one of the following: for the user equipment whose admission control succeeds, the target donor base station maps the radio bearer of the user equipment to the radio On the radio bearer of the relay node, and/or the target donor base station carries the list of the user equipment through the X2 handover request confirmation message or the S1 handover request confirmation message; for the user equipment whose admission control fails, the target donor base station notifies the information of the user equipment The wireless relay node, or initiate the release of the user equipment through a process with the core network.

Preferably, the source donor base station sends the context information of the user equipment managed by the wireless relay node to the target donor base station through an X2 handover request message or an S1 handover request message.

Preferably, the source donor base station acquires the context information of the user equipment managed by the wireless relay node in advance from the wireless relay node in one of the following ways: Obtaining the context information of the user equipment managed by the wireless relay node through a wireless resource establishment process Information; Obtain the context information of the user equipment under the jurisdiction of the wireless relay node through the X2 handover process; Obtain the context information of the user equipment under the jurisdiction of the wireless relay node through the S1 handover process; command to acquire the context information of the user equipment managed by the wireless relay node.

Preferably, the context information of the user equipment includes at least one of the following: cell radio network temporary identifier of the user equipment, measurement configuration of the user equipment, signaling radio bearer configuration of the user equipment, data radio bearer configuration of the user equipment, capability of the user equipment Information, the current serving mobility management entity of the user equipment.

In order to achieve the above purpose, according to another aspect of the present invention, a wireless relay node handover processing system is provided.

The processing system for wireless relay node handover according to the present invention includes a source donor base station, a wireless relay node, and a target donor base station, wherein the source donor base station includes: a determining module for determining to switch the wireless relay node to the target donor base station; sending A module, configured to send the context information of the user equipment managed by the wireless relay node to the target donor base station, where the context information of the user equipment managed by the wireless relay node is obtained from the wireless relay node in advance by the source donor base station.

Preferably, the target host base station includes: a receiving module, configured to receive context information of user equipment under the jurisdiction of the wireless relay node; an admission control module, configured to perform admission control on the user equipment under the jurisdiction of the wireless relay node according to the context information .

Preferably, the admission control module includes: a mapping submodule, used for mapping the radio bearer of the user equipment to the radio bearer of the wireless relay node for the user equipment whose admission control is successful; The user equipment of the X2 handover request acknowledgment message or the S1 handover request acknowledgment message carries the list of the user equipment; the notification submodule is used to notify the wireless relay node of the information of the user equipment for which the admission control fails; initiate The sub-module is used for initiating release of the user equipment for which the admission control fails through a process with the core network.

Preferably, the sending module sends the context information of the user equipment under the jurisdiction of the wireless relay node to the target donor base station through an X2 handover request message or an S1 handover request message; Obtain the context information of the user equipment under the jurisdiction of the wireless relay node: obtain the context information of the user equipment under the jurisdiction of the wireless relay node through the wireless resource establishment process; obtain the context information of the user equipment under the jurisdiction of the wireless relay node through the X2 handover process ; Acquiring the context information of the user equipment under the jurisdiction of the wireless relay node through the S1 handover process; acquiring the context information of the user equipment under the jurisdiction of the wireless relay node by analyzing the signaling interacted between the wireless relay node and the core network.

The present invention sends the context information of the user equipment under the jurisdiction of the wireless relay node to the target host base station through the source host base station, so that the target host base station can also perform admission control according to the context of the user equipment, thereby ensuring the accuracy of admission control results.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a schematic diagram of a wireless relay node architecture according to related technologies;

FIG. 2 is a flow chart of handover via the core network according to the related art;

FIG. 3 is a flow chart of switching via a direct interface according to the related art;

FIG. 4 is a processing method for wireless relay node handover according to an embodiment of the present invention;

Fig. 5 is a flowchart according to a preferred embodiment of the present invention;

Fig. 6 is a structural block diagram of a processing system for wireless relay node handover according to an embodiment of the present invention.

Detailed ways

It should be noted that, 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 present invention will be described in detail below with reference to the accompanying drawings and examples.

The present invention provides a processing method for wireless relay node switching. FIG. 4 is a flowchart of a processing method for wireless relay node switching according to an embodiment of the present invention. As shown in FIG. 4 , it includes the following steps S402 to S404 .

Step S402, the source donor base station determines to handover the wireless relay node to the target donor base station.

Step S404, the source donor base station sends the context information of the user equipment under the jurisdiction of the wireless relay node to the target donor base station, wherein the context information of the user equipment under the jurisdiction of the wireless relay node is obtained by the source donor base station from the wireless relay node in advance .

In related technologies, the target donor base station only performs admission control according to the context of the wireless relay node. In the embodiment of the present invention, the context information of the user equipment under the jurisdiction of the wireless relay node is sent to the target donor base station through the source donor base station, so that the target donor base station can also perform admission control according to the context of the user equipment, thereby ensuring the admission control result accuracy.

Preferably, after the source donor base station sends the context information of the user equipment managed by the wireless relay node to the target donor base station, the above method further includes: the target donor base station receives the context information of the user equipment managed by the wireless relay node; The target donor base station performs admission control on the user equipment under the jurisdiction of the wireless relay node according to the context information.

Preferably, the target donor base station performs admission control on the user equipment managed by the wireless relay node according to the context information, including one of the following: for the user equipment whose admission control succeeds, the target donor base station maps the radio bearer of the user equipment to the radio on the radio bearer of the relay node; and/or the target donor base station carries the list of the user equipment through the X2 handover request confirmation message or the S1 handover request confirmation message; for the user equipment whose admission control fails, the target donor base station notifies the information of the user equipment The wireless relay node, or initiate the release of the user equipment through a process with the core network.

Preferably, the source donor base station sends the context information of the user equipment managed by the wireless relay node to the target donor base station through an X2 handover request message or an S1 handover request message.

Preferably, the source donor base station acquires the context information of the user equipment managed by the wireless relay node in advance from the wireless relay node in one of the following ways: Obtaining the context information of the user equipment managed by the wireless relay node through a wireless resource establishment process Information; Obtain the context information of the user equipment under the jurisdiction of the wireless relay node through the X2 handover process; Obtain the context information of the user equipment under the jurisdiction of the wireless relay node through the S1 handover process; command to acquire the context information of the user equipment managed by the wireless relay node.

Preferably, the context information of the user equipment includes at least one of the following: a Cell Radio Network Temporary Identifier (C-RNTI for short) of the user equipment, a measurement configuration of the user equipment, a signaling radio bearer ( Signaling Radio Bearer (referred to as SRB) configuration, data radio bearer (Data Radio Bearer, referred to as DRB) configuration of user equipment, capability information of user equipment, mobility management entity (Mobile Management Entity, referred to as MME).

The implementation process of the embodiment of the present invention will be described in detail below with reference to examples.

This embodiment describes a group of terminals (UEs) accessing a wireless relay node RN through a wireless connection. The RN switches to the target host base station Target DeNB through the source host base station Source DeNB, and the Source DeNB carries the context of the UE under the jurisdiction of the RN through the handover signaling of S1 or X2.

Fig. 5 is a flow chart according to a preferred embodiment of the present invention, as shown in Fig. 5, including the following steps S502 to S512.

In step S502, the RN detects the Source DeNB according to the OAM configuration and surrounding wireless signals. The RN initiates an RRC connection establishment request to the Source DeNB, and indicates to the Source DeNB that it is a wireless relay node. SourceDeNB selects MME for RN and establishes a radio access bearer (E-UTRAN Radio Access Bearer, E-RAB). During this process, MME performs device identity verification for RN. After the verification is passed, the Source DeNB allocates dedicated radio resources and data radio bearers for the RN on the air interface. On this bearer, RN establishes a connection with OAM to obtain and update parameters, and at the same time establishes S1 and X2 interfaces with RN on this bearer. At this time, the RN starts to establish its own cell, and broadcasts the system on the air interface.

Step S504, a group of UEs are detected from the air interface and camped in the cell established by the RN. When the UE enters the connected state, an RRC connection is established between the UE and the RN, and the RN allocates dedicated resources such as C-RNTI, configuration measurement, SRB, and DRB for the UE. In the identity of eNB, RN requests the establishment of E-RAB for this UE through S1 Initial UE Message signaling. The signaling is forwarded to the corresponding MME through the DeNB. The MME establishes the E-RAB for the UE through the S1 Initial Context Setup signaling, and carries the capability information of the UE at the same time. The RN saves the context information of the connected UE obtained in the above process (including the UE's Cell Radio Network Temporary Identifier (C-RNTI), the UE's measurement configuration, and the Signaling Radio Bearer (SRB) One or more of configuration, data radio bearer (Data Radio Bearer, DRB) configuration, UE capability, UE current Serving MME and other information).

In step S506, the RN notifies the Source DeNB of the context information of the UE through the control plane signaling (e.g. RRC process, S1 process or X2 process) with the Source DeNB.

Step S508, as the RN moves, the Source DeNB judges that the RN is approaching the target donor base station Target DeNB through the measurement report. According to the network topology connection, Source DeNB chooses to initiate direct interface handover X2 Handover or ground side handover S1 Handover to Target DeNB, and sends X2 Handover Request or S1 Handover required message accordingly. The message indicates that the RN is a wireless relay node, carries the context of the RN, and also carries the context information of the UE under the jurisdiction of the RN obtained in step 103 .

In step S510, the Target DeNB judges that the RN can be admitted according to the context of the RN, and at the same time performs further admission control for each UE according to the context of the UE under the jurisdiction of the RN and its own radio resources provided by the Source DeNB in step S508. The Target DeNB carries the result of the admission control through the S1/X2 Handover Request Acknowledge message, that is, the list of UEs that can be admitted. The optional Target DeNB can also initiate the context of the UE to the MME according to the information of the ServingMME of the UE saved in the context Release; or the Target DeNB notifies the RN of the terminal list that fails to be accepted through a control plane message (e.g. RRC process, S1 process or X2 process) with the RN, and the RN performs further release processing.

For the UE that can be admitted, the Target DeNB needs to judge the corresponding relationship between the E-RAB of this UE and the E-RAB it established for the RN according to the configuration.

In step S512, the Source DeNB instructs the RN to switch to the Target DeNB through the RRC RRCConnectionReconfiguration message. The signaling carries the necessary air interface configuration for the RN to access the Target DeNB. RN synchronizes with Target DeNB according to the new wireless configuration, and sends RRCRRCConnectionReconfigurationComplete message to Target DeNB.

It should be noted that, in addition to the wireless relay technology, the present invention can also be applied to other technologies. For example, equipment such as L1 Repeater may also carry a group of UEs for handover. In this group handover (Group Mobility) scenario, the present invention can be used The method can also realize that the target donor base station can also perform admission control according to the context of the user equipment, thereby ensuring the accuracy of the admission control result.

It should be noted that the steps shown in the flowcharts of the accompanying drawings may be performed in a computer system, such as a set of computer-executable instructions, and that although a logical order is shown in the flowcharts, in some cases, The steps shown or described may be performed in an order different than here.

An embodiment of the present invention provides a wireless relay node switching processing system, and the wireless relay node switching processing system can be used to implement the above wireless relay node switching processing method. 6 is a structural block diagram of a wireless relay node handover processing system according to an embodiment of the present invention. As shown in FIG. It includes a determining module 622 and a sending module 624 . Its structure is described in detail below.

A determining module 622, configured to determine that the wireless relay node 64 is handed over to the target donor base station 66; a sending module 624, connected to the determining module 622, configured to send the context information of the user equipment under the jurisdiction of the wireless relay node 64 to the determining module 622 Determine the target donor base station 66, where the context information of the user equipment managed by the wireless relay node 64 is obtained by the source donor base station from the wireless relay node in advance.

Preferably, the target donor base station 66 includes a receiving module 662 and an admission control module 664, the structures of which will be described in detail below.

The receiving module 662 is configured to receive the context information of the user equipment under the jurisdiction of the wireless relay node 62; the admission control module 664 is connected to the receiving module 662, and is configured to perform the context information received by the wireless relay node 62 according to the context information received by the receiving module 662. Administered user equipment for admission control.

Preferably, the admission control module 664 includes a mapping submodule 6642, a notification submodule 6644 and an initiation submodule 6646, the structures of which will be described in detail below.

The mapping submodule 6642 is configured to map the radio bearer of the user equipment to the radio bearer of the radio relay node 62 for the user equipment whose admission control is successful; the carrying submodule 6644 is used to use the user equipment whose admission control is successful through The X2 handover request confirmation message or the S1 handover request confirmation message carries the list of the user equipment; the notification submodule 6646 is used for notifying the wireless relay node 64 of the information of the user equipment for which the admission control fails; the initiation submodule 6648 , for initiating release of the user equipment for which the admission control fails through a process with the core network.

Preferably, the sending module 624 sends the context information of the user equipment managed by the wireless relay node 64 to the target donor base station 66 through an X2 handover request message or an S1 handover request message; the source donor base station 62 obtains from The wireless relay node 64 obtains the context information of the user equipment under the jurisdiction of the wireless relay node 64: obtains the context information of the user equipment under the jurisdiction of the wireless relay node 64 through the wireless resource establishment process; obtains the context information of the wireless relay node 64 through the X2 handover process The context information of the user equipment under the jurisdiction; the context information of the user equipment under the jurisdiction of the wireless relay node 64 is obtained through the S1 handover process; Context information of user equipment.

It should be noted that the wireless relay node switching processing system described in the device embodiment corresponds to the above method embodiment, and its specific implementation process has been described in detail in the method embodiment, and will not be repeated here.

In summary, according to the above embodiments of the present invention, a method and system for processing wireless relay node handover are provided. The present invention sends the context information of the user equipment under the jurisdiction of the wireless relay node to the target host base station through the source host base station, so that the target host base station can also perform admission control according to the context of the user equipment, thereby ensuring the accuracy of admission control results.

Obviously, those skilled in the art should understand that each module or each step of the above-mentioned present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed in a network formed by multiple computing devices Optionally, they can be implemented with program codes executable by a computing device, so that they can be stored in a storage device and executed by a computing device, or they can be made into individual integrated circuit modules, or they can be integrated into Multiple modules or steps are fabricated into a single integrated circuit module to realize. As such, the present invention is not limited to any specific combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. a wireless relay nodes switching processing method is characterized in that, comprising:

The sourcesink dominant base is confirmed wireless relay nodes is switched to target host base station;

Said sourcesink dominant base sends to said target host base station with the contextual information of the subscriber equipment that said wireless relay nodes is had jurisdiction over, and the contextual information of the subscriber equipment that wherein said wireless relay nodes is had jurisdiction over is that said sourcesink dominant base obtains from said wireless relay nodes in advance.

2. method according to claim 1 is characterized in that, after the contextual information of the subscriber equipment that said sourcesink dominant base is had jurisdiction over said wireless relay nodes sent to said target host base station, said method also comprised:

Said target host base station receives the contextual information of the subscriber equipment that said wireless relay nodes has jurisdiction over;

Said target host base station is admitted control according to said contextual information to the subscriber equipment that said wireless relay nodes is had jurisdiction over.

3. method according to claim 2 is characterized in that, said target host base station is according to said contextual information, and it is one of following that the subscriber equipment that said wireless relay nodes is had jurisdiction over admits control to comprise:

For admitting the successful subscriber equipment of control; Said target host base station is mapped to the radio bearer of this subscriber equipment on the radio bearer of said wireless relay nodes, and/or the tabulation of this subscriber equipment is carried in said target host base station through X2 switching request acknowledgement message or S1 switching request acknowledgement message;

For the subscriber equipment of admitting the control failure, said target host notifies said wireless relay nodes with the information of this subscriber equipment in the base station, perhaps through initiating the release of this subscriber equipment with the flow process of core net.

4. according to each described method in the claim 1 to 3; It is characterized in that said sourcesink dominant base sends to said target host base station through the contextual information of the subscriber equipment that X2 handoff request message or S1 handoff request message are had jurisdiction over said wireless relay nodes.

5. according to each described method in the claim 1 to 3, it is characterized in that said sourcesink dominant base obtains the contextual information of the subscriber equipment that said wireless relay nodes has jurisdiction in advance through comprising one of following mode from said wireless relay nodes:

Set up the contextual information that flow process is obtained the subscriber equipment that said wireless relay nodes has jurisdiction over through Radio Resource;

Obtain the contextual information of the subscriber equipment that said wireless relay nodes has jurisdiction over through the X2 switching flow;

Obtain the contextual information of the subscriber equipment that said wireless relay nodes has jurisdiction over through the S1 switching flow;

Obtain the contextual information of the subscriber equipment that said wireless relay nodes has jurisdiction over through resolving said wireless relay nodes and core net interactive signaling.

6. according to each described method in the claim 1 to 3; It is characterized in that, the contextual information of said subscriber equipment comprise following one of at least: the Mobility Management Entity of the current service of the Signaling Radio Bearer configuration of the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI of said subscriber equipment, the measurement configuration of said subscriber equipment, said subscriber equipment, the Data Radio Bearer configuration of said subscriber equipment, the ability information of said subscriber equipment, said subscriber equipment.

7. a wireless relay nodes switching processing system is characterized in that, comprises sourcesink dominant base, wireless relay nodes and target host base station, and wherein said sourcesink dominant base comprises:

Determination module is used for confirming said wireless relay nodes is switched to said target host base station;

Sending module; The contextual information of the subscriber equipment that is used for said wireless relay nodes is had jurisdiction over sends to said target host base station, and the contextual information of the subscriber equipment that wherein said wireless relay nodes is had jurisdiction over is that said sourcesink dominant base obtains from said wireless relay nodes in advance.

8. system according to claim 7 is characterized in that, said target host base station comprises:

Receiver module is used to receive the contextual information of the subscriber equipment that said wireless relay nodes has jurisdiction over;

Admit control module, be used for the subscriber equipment that said wireless relay nodes is had jurisdiction over being admitted control according to said contextual information.

9. system according to claim 8 is characterized in that, said admittance control module comprises:

Mapping submodule is used for for admitting the successful subscriber equipment of control, and the radio bearer of this subscriber equipment is mapped on the radio bearer of said wireless relay nodes;

Carry submodule, be used for for admitting the successful subscriber equipment of control, the tabulation of carrying this subscriber equipment through X2 switching request acknowledgement message or S1 switching request acknowledgement message;

The notice submodule is used for notifying said wireless relay nodes for the subscriber equipment of admitting the control failure with the information of this subscriber equipment;

Initiate submodule, be used for, through initiating the release of this subscriber equipment with the flow process of core net for the subscriber equipment of admitting the control failure.

10. according to each described system in the claim 7 to 9, it is characterized in that,

Said sending module sends to said target host base station through the contextual information of the subscriber equipment that X2 handoff request message or S1 handoff request message are had jurisdiction over said wireless relay nodes;

Said sourcesink dominant base obtains the contextual information of the subscriber equipment that said wireless relay nodes has jurisdiction in advance through comprising one of following mode from said wireless relay nodes: set up the contextual information that flow process is obtained the subscriber equipment that said wireless relay nodes has jurisdiction over through Radio Resource; Obtain the contextual information of the subscriber equipment that said wireless relay nodes has jurisdiction over through the X2 switching flow; Obtain the contextual information of the subscriber equipment that said wireless relay nodes has jurisdiction over through the S1 switching flow; Obtain the contextual information of the subscriber equipment that said wireless relay nodes has jurisdiction over through resolving said wireless relay nodes and core net interactive signaling.

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