WO2012167665A1 - Procédé et système de traitement de signalisation pour une commutation de nœud de relais - Google Patents

Procédé et système de traitement de signalisation pour une commutation de nœud de relais Download PDF

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Publication number
WO2012167665A1
WO2012167665A1 PCT/CN2012/073918 CN2012073918W WO2012167665A1 WO 2012167665 A1 WO2012167665 A1 WO 2012167665A1 CN 2012073918 W CN2012073918 W CN 2012073918W WO 2012167665 A1 WO2012167665 A1 WO 2012167665A1
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Prior art keywords
base station
user
control signaling
relay node
target base
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PCT/CN2012/073918
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English (en)
Chinese (zh)
Inventor
陈琳
奚进
陈思
翟恒星
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/20—Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a signaling processing method and system for relay node switching.
  • LTE-Advanced Long-Term Evolution advance
  • UTE-Advanced retains the core of LTE for the evolution of Long-Term Evolution (LTE), and on this basis, it uses a series of technologies to expand the frequency domain and airspace to improve spectrum utilization and increase System capacity and other purposes.
  • Wireless Relay technology one of the technologies in LTE-Advanced, aims to extend the coverage of cells, reduce dead zones in communications, balance load, transfer hotspots, and save user equipment (User Equipment, referred to as UE) transmit power.
  • UE User Equipment
  • a relay node provides similar functions and services to a UE accessing its cell, and accesses a service through a wireless interface in a manner similar to a normal UE.
  • the eNB serving as the eNB is called a Donor eNB, or DeNB for short.
  • the DeNB is connected to a Mobility Management Entity (MME).
  • MME Mobility Management Entity
  • the industry proposes to deploy a relay node on the high-speed rail, so that users in the high-speed train, such as UE1 and UE2, directly communicate with the relatively stationary RN, and the RN can switch between different DeNBs during the high-speed rail movement, thereby The simultaneous switching of a large number of users in the high-speed rail car is avoided, and the communication quality between the UE and the RN is ensured.
  • the above problems of the high-speed rail can be better solved.
  • the introduction of mobile RN will have a greater impact on the RN related standards in the existing LTE-Advanced, such as The DeNB processes the SI signaling flow.
  • the RN and the DeNB establish a unique S1 connection on the control plane (the DeNB is regarded as a unique MME), and all UE-related S1AP signaling is sent to the DeNB through the S1 connection.
  • the DeNB processes the SI Application Protocol (S1AP) signaling and connects it to the real MME destination of the UE through its own control plane S1.
  • SIAP SI Application Protocol
  • the processing of the S1AP signaling by the DeNB includes tampering with the S1AP identifier (Identifier, ID), the transport layer address, and the Tunnel Endpoint Identifier (TEID).
  • the S1AP ID is allocated by the eNB (including the RN and the DeNB) or the MME for uniquely identifying the UE-related S1 logical connection when the UE-related S1 logical connection is created. For example, for a UE-related S1 logical connection, the eNB needs to allocate a unique eNB UE S1AP ID within the eNB, and the MME needs to allocate a unique MME UE S1AP ID within the MME range, and all subsequent UE-related The information of these two IDs is included in the S1AP signaling.
  • the MME UE S1AP IDs allocated by the MMEs for the UE-related S1 logical connections may be duplicated here, thereby causing When the DeNB receives the S1AP signaling sent by the RN, it cannot distinguish which MME to forward to. Similarly, it is also possible for the DeNB to serve multiple different RNs and UEs at the same time. The eNBs allocated by the RNs for the UE-related S1 logical connections are also likely to be duplicated here. The eNBs also need to repeat the eNB UE S1AP IDs.
  • the DeNB modifies the UE S 1 AP ID (S1AP ID2 ) information allocated by the MME/RN, and transmits the UE S1AP ID (SI AP ID1 ) uniquely allocated in the DeNB to the RN/MME, and The DeNB stores a mapping relationship table between the S1AP ID1 and the S1AP ID2 and the corresponding UE information. For the received SI AP signaling from the RN or the MME, the DeNB performs corresponding replacement modification on the SI AP ID information therein.
  • the MME and the S-GW serving the UE1 and the UE2 do not perceive the change of the path with the UE. Therefore, the downlink control signaling and data packets sent from the MME/S-GW to UE1 and UE2 are still first routed to the source DeNB1, then forwarded by the source DeNB1 to the target DeNB2, and finally forwarded by the DeNB2 through the RN. To UE1 and UE2, in the corresponding uplink signaling process, the uplink control signaling and data packets sent by UE1 and UE2 to the MME are also forwarded through the opposite path.
  • the target DeNB does not have a corresponding S1AP ID mapping table, so that the target DeNB cannot forward the UE-related S1AP signaling to the correct RN/MME after the RN handover is completed, causing the UE related signaling process to fail.
  • the target DeNB does not have the S1AP ID mapping table corresponding to the UE, so that the target DeNB cannot forward the UE-related S1AP signaling to the correct RN/MME after the RN handover is completed.
  • the technical problem to be solved by the present invention is to provide a signaling processing method and system for relay node handover, which ensures normal forwarding of user-related control signaling during relay node handover, and reduces relay node handover and signaling. Let the effect of the transmission.
  • the present invention provides a signaling processing method for relay node handover, where a source base station to which a relay node belongs transmits control information of a control signaling identifier of a user managed by a relay node. a target base station to which the relay node needs to be handed over; after the relay node switches from the source base station to the target base station, the source base station and/or the target base station according to the mapping information to the received user Control signaling is processed.
  • the above method may also have the following features:
  • the control signaling identifier mapping information includes a mapping relationship between a control signaling protocol identifier assigned by the base station or the relay node for the user and a control signaling protocol identifier assigned by the mobility management entity to the user.
  • the above method may also have the following features:
  • the source base station or the target base station After receiving the user control signaling, the source base station or the target base station performs processing according to the signaling processing mode of the local base station, and when the signaling processing mode is the modified mode, the information is modified according to the control signaling identifier of the user.
  • the user control signaling is sent to the destination of the user control signaling, when the signaling processing mode is the forwarding mode, the user control signaling is forwarded to the destination of the user control signaling; the signaling processing of the source base station The mode is a forwarding mode and the signaling processing mode of the target base station is a modified mode; or the signaling processing mode of the source base station is a modified mode and the target base station The signaling processing mode is the forwarding mode.
  • the above method may also have the following features:
  • the target base station After receiving the mapping information, the target base station updates the control signaling identifier of the user according to the mapping relationship; after the relay node switches from the source base station to the target base station, the source
  • the base station modifies the user control signaling according to the control signaling identifier mapping information of the user, and sends the user control signaling to the target mobile station or the mobile management entity corresponding to the user; the target base station receives the user control.
  • the user control signaling is modified according to the control signaling identifier mapping information of the user, and then sent to the source base station or the relay node.
  • the above method may also have the following features:
  • the target base station After receiving the mapping information, the target base station determines whether it conflicts with the control signaling identifier of the user saved in the target base station. If the target base station conflicts, the target base station allocates a new control signaling identifier to the user. Notify to the source base station.
  • the foregoing method may further have the following feature: after receiving the mapping information, the target base station updates the control signaling identifier of the user according to the mapping relationship; the relay node is from the source base station. After the target base station receives the user control signaling, the target base station modifies the user control signaling according to the control signaling identifier mapping information of the user, and sends the user control signaling to the relay node or the corresponding user.
  • Mobile management entity after receiving the mapping information, the target base station updates the control signaling identifier of the user according to the mapping relationship; the relay node is from the source base station.
  • the target base station modifies the user control signaling according to the control signaling identifier mapping information of the user, and sends the user control signaling to the relay node or the corresponding user.
  • the foregoing method may further have the following feature: after receiving the mapping information, the target base station determines whether it conflicts with the control signaling identifier of the user saved in the target base station, and if the conflict occurs, the target base station is The user assigns a new control signaling identifier and notifies the relay node and the mobility management entity corresponding to the user.
  • the above method may further have the following feature: the target base station completes the user control signaling identifier update in the mobility management entity by performing path switch update for the user served by the relay node.
  • the present invention provides a signaling processing system for relay node handover, including a relay node, a source base station to which the relay node belongs, and a target base station to which the relay node needs to be handed over,
  • the source base station is set to: map the control signaling identifier of the user managed by the relay node Sending the information to the target base station; after the relay node switches from the source base station to the target base station, processing the received user control signaling according to the mapping information; the target base station is set to After the relay node switches from the source base station to the target base station, the received user control signaling is processed according to the mapping information.
  • the above system may also have the following characteristics:
  • the signaling processing mode of the source base station is a forwarding mode, and the signaling processing mode of the target base station is a modified mode; or the signaling processing mode of the source base station is a modified mode and the signaling processing mode of the target base station
  • the source base station or the target base station is further configured to: after receiving the user control signaling, processing according to the signaling processing mode of the local base station, and when the signaling processing mode is the modified mode, according to the user
  • the control signaling identifier mapping information is sent to the destination of the user control signaling after modifying the user control signaling, and the user control signaling is forwarded to the destination of the user control signaling when the signaling processing mode is the forwarding mode.
  • the above system may also have the following characteristics:
  • the target base station is further configured to: after receiving the mapping information, update a control signaling identifier of the user according to the mapping relationship; and switch, at the relay node, the source base station to the target After the base station receives the user control signaling, the user control signaling is modified according to the control signaling identifier mapping information of the user, and then sent to the source base station or the relay node; the source base station is further configured to After the relay node receives the user control signaling after switching from the source base station to the target base station, the user control signaling is modified according to the control signaling identifier mapping information of the user, and then sent to the The target mobile station or the mobile management entity corresponding to the user.
  • the present invention provides a signaling processing system for relay node handover, including a relay node, a source base station to which the relay node belongs, and a target base station to which the relay node needs to be handed over,
  • the source base station is configured to: send control signaling identifier mapping information of the user managed by the relay node to the target base station; and the target base station is configured to: after receiving the mapping information, according to the mapping relationship Updating the control signaling identifier of the user; when receiving the user control signaling after the relay node switches from the source base station to the target base station, modifying the user according to the control signaling identifier mapping information of the user
  • the control signaling is sent to the relay node or the mobile management entity corresponding to the user.
  • Embodiments of the present invention notify a source base station of control signaling identifier mapping information to a target base
  • the station through a simple identifier mapping or update, ensures smooth forwarding execution of the relevant S1 signaling process of the user, and reduces the impact of the relay node handover on the control signaling.
  • 1 is a schematic diagram of handover of a relay node between different DeNBs
  • FIG. 2 is a schematic diagram of an S1 control plane protocol stack
  • FIG. 3 is a schematic diagram of a switching manner according to Embodiments 1 and 2;
  • FIG. 4 is a schematic diagram of a switching manner according to Embodiment 3.
  • FIG. 5 is a flowchart of a signaling processing method for relay node handover in the embodiment. Preferred embodiment of the invention
  • the signaling processing method for relay node handover includes: sending, by a source base station to which a relay node belongs, control signaling identifier mapping information of a user managed by a relay node to the relay node
  • the target base station is switched in; after the relay node switches from the source base station to the target base station, the source base station and/or the target base station processes the received user control signaling according to the mapping information.
  • the control signaling identifier mapping information includes a mapping relationship between a control signaling protocol identifier allocated by the base station or the relay node for the user and a control signaling protocol identifier allocated by the mobility management entity to the user.
  • the user control signaling refers to the control signaling of the S1 application protocol.
  • the present invention is typically applicable to handover scenarios in which a relay node and a managed terminal move at the same speed.
  • the above method in the present invention includes three embodiments.
  • the first embodiment and the second embodiment are applicable to the handover mode shown in FIG. 3, that is, after the handover is completed, the information of the user transmitted between the target base station and the mobility management entity is still transmitted via the source base station.
  • the third embodiment is applicable to the handover mode shown in FIG. 4, that is, after the handover is completed, the target base station directly communicates with the mobility management entity.
  • the source base station sends control signaling identifier mapping information to the target base station, which is all completed during the handover process.
  • Embodiment 1 After receiving the user control signaling, the source base station or the target base station performs processing according to the signaling processing mode of the local base station.
  • the signaling processing mode is the modified mode
  • the user control signal is modified according to the control signaling identifier mapping information of the user.
  • the user control signaling is sent to the destination of the user control signaling.
  • the signaling processing mode is the forwarding mode
  • the user control signaling is forwarded to the destination of the user control signaling.
  • the signaling processing mode of the source base station is the forwarding mode and the signaling processing mode of the target base station is the modified mode; or the signaling processing mode of the source base station is the modified mode and the signaling processing mode of the target base station is the forwarding mode.
  • the modifying the user control signaling by the source base station or the target base station includes: modifying the control signaling identifier, modifying the transport network layer address, and the tunnel endpoint identifier.
  • the source base station sends the control signaling identifier mapping information to the target base station by sending the control signaling identifier mapping information to the target base station by using the handover request message.
  • the control signaling identifier mapping information may be control signaling identifier mapping information for one or more users served by the relay node.
  • the signaling processing mode of the source base station and the target base station may be configured by default by the system, or may be notified to the target base station after being determined by the source base station.
  • the manner in which the source base station notifies the target base station of the signaling processing mode of the target base station may be sent to the target base station together with the control signaling identifier mapping information, for example, the control signaling identifier mapping information and the signaling processing mode are simultaneously performed by using the handover request message.
  • the target base station After being sent to the target base station, the target base station saves the user-related control signaling identifier mapping information, the mode information, and the relay node information to be cut in.
  • the method for processing the user-related control signaling by the source base station according to the signaling processing mode specifically includes: the source base station searching for the mode information according to the received signaling identifier of the user-related control signaling and the corresponding S1 connection information; If the source base station receives the user-related control signaling sent from the mobility management entity, and the mode is the forwarding mode, the source base station forwards the user-related control signaling to the corresponding target base station; if the source base station receives the slave mobile The user-related control signaling sent by the management entity, and the processing mode is the modified mode, the source base station modifies the user-related control signaling and then forwards the user-related control signaling to the corresponding target base station; if the source base station receives the destination The user-related control signaling sent by the base station, and the mode is the forwarding mode, the source base station forwards the user-related control signaling to the corresponding mobility management entity; if the source base station receives the user-related control signaling sent by the destination base station; if
  • the method for processing the user-related control signaling by the source base station according to the signaling processing mode specifically includes: the target base station searching for the mode information according to the received signaling identifier of the user-related control signaling and the corresponding S1 connection information; If the target base station receives the user-related control signaling sent from the relay node, and the mode is the forwarding mode, the target base station forwards the user-related control signaling to the corresponding source base station; if the target base station receives the slave relay node After the user-related control signaling is sent, and the processing mode is the modified mode, the target base station modifies the user-related control signaling and then forwards the user-related control signaling to the corresponding source base station; if the target base station receives the source base station, The user-related control signaling, and the mode is the forwarding mode, the target base station forwards the user-related control signaling to the corresponding relay node; if the target base station receives the user-related control signaling sent by the source base station, and
  • the target base station After receiving the mapping information, the target base station updates the control signaling identifier of the user according to the mapping relationship; after the relay node switches from the source base station to the target base station, when the source base station or the target base station receives the user control signaling, according to the The user's control signaling identifier mapping information is sent to the destination of the user control signaling after modifying the user control signaling.
  • the method further includes: after receiving the mapping information, the target base station determines whether it conflicts with the control signaling identifier of the user saved in the target base station, and if the conflict occurs, the target base station allocates a new control signaling identifier to the user and notifies To the source base station.
  • the target base station may send the newly allocated user-related control signaling identifier mapping information to the source base station through the handover request acknowledgement message.
  • the method further includes: the source base station forwarding the received newly allocated user-related control signaling identifier mapping information to the relay node; Receiving the newly allocated user-related control signaling identifier mapping information, and correspondingly updating the user-related control signaling identifier information; after the relay node completes the handover, sending the relevant control signal according to the updated user-related control signaling identifier make.
  • the source base station or the target base station modifying the user control signaling includes: modifying the control signaling identifier, Modify the transport network layer address and tunnel endpoint identifier.
  • the source base station sends the control signaling identifier mapping information to the target base station by sending the control signaling identifier mapping information to the target base station by using the handover request message.
  • the target information of the user-related control signaling identifier is saved and the relay node information to be cut in is prepared.
  • the source base station and the target base station process the user-related control signaling according to the user-related control signaling identifier mapping information, and further includes: for the received relay node or the S1 control signaling sent by the source base station, the target base station controls according to the user
  • the signaling identifier mapping information is modified to the signaling identifier information, the transport network layer address, and the tunnel endpoint identifier information, and then forwarded to the source base station or the relay node; for the received mobility management entity or the S1 control signaling sent by the target base station,
  • the source base station modifies the signaling identifier information, the transport network layer address, and the tunnel endpoint identifier information according to the user-related control signaling identifier mapping information, and then forwards to the target base station or the mobility management entity.
  • the signaling processing system for relay node handover corresponding to the foregoing method includes a relay node, a source base station to which the relay node belongs, and a target base station to which the relay node needs to be handed over, and processing manners of each entity and description in the foregoing method The same, no longer repeat here.
  • Embodiment 3 After receiving the mapping information, the target base station updates the control signaling identifier of the user according to the mapping relationship; after the relay node switches from the source base station to the target base station, when the target base station receives the user control signaling, according to the user The control signaling identifier mapping information is modified and sent to the relay node or the mobile management entity corresponding to the user.
  • the manner in which the source base station sends the control signaling identifier mapping information to the target base station is to send the control signaling identifier mapping information to the target base station through the handover request message.
  • the target base station After receiving the mapping information, the target base station determines whether it conflicts with the control signaling identifier of the user saved in the target base station, and if the conflict occurs, the target base station allocates a new control signaling identifier to the user and notifies the relay node and The mobile management entity corresponding to the user.
  • the target base station completes the user control signaling identifier update at the mobility management entity by performing a path switch update for the user served by the relay node.
  • the relay node RN switches from the source DeNB1 to the target DeNB2, and when the RN switches from the source DeNB1 to the target DeNB2, since the UE1 and the UE2 served by the RN do not participate in the handover, the MMEs serving the UE1 and the UE2 are The S-GW does not perceive a change in the path with the UE. Therefore, the downlink control signaling and data packets sent from the MME/S-GW to the UE1 and the UE2 are still first routed to the source DeNB1, then forwarded by the source DeNB1 to the target DeNB2, and finally forwarded by the DeNB2 to the UE1 and the UE2 through the RN, and vice versa.
  • the uplink control signaling and data packets sent by the UE1 and the UE2 to the MME are also forwarded through the opposite path.
  • the target DeNB does not have a corresponding S1AP ID mapping table, so that the target DeNB cannot forward the UE-related S1AP signaling to the correct RN/MME after the RN handover is completed.
  • the user-related control signaling identifier mapping and mode information are sent to the target base station by the source DeNB1, and the source DeNB1 and the target DeNB subsequently process the user-related control signaling according to the mode information.
  • the present embodiment can be further divided into the first embodiment and the second embodiment, which are described separately.
  • the relay node RN initially accesses the DeNB 1 and performs Un-port communication through the DeNB 1.
  • the relay node RN performs scanning measurement on neighboring neighboring base stations in the process of moving, and sends a measurement report to the DeNB 1.
  • the DeNB 1 determines that the RN needs to perform handover.
  • the DeNB 1 selects the DeNB 2 as the target base station, and transmits a handover request message to the DeNB 2, where the handover request message includes control signaling identifier mapping information and processing mode information related to the user served by the RN.
  • the processing mode is a forwarding mode that requires the DeNB2 to perform only the forwarding operation. Accordingly, the DeNB1 sets its corresponding control signaling processing mode related to the user served by the RN to the modification mode.
  • the DeNB 2 After receiving the handover request message sent by the DeNB 1, the DeNB 2 stores the user-related control signal identifier mapping information, the mode information, and the relay node information to be handed over, and then transmits a handover confirmation message to the DeNB1.
  • the DeNB1 After the RN completes the handover, if the DeNB1 receives the user-related control signaling sent by the mobility management entity, the DeNB1 searches for the corresponding user according to the received signaling identifier of the user-related control signaling and the corresponding S1 connection information, if the user belongs to the user. The user served by the RN that has switched, DeNB1 searches for corresponding mode information. After the DeNB1 finds that the corresponding processing mode is the modified mode, the DeNB1 modifies the user-related control signaling, and the specific modification includes modifying the control signaling identifier, modifying the transport network layer address and the tunnel endpoint identifier, and then the user-related control signaling. Forwarded to DeNB2.
  • the DeNB2 After receiving the user-related control signaling, the DeNB2 searches for the corresponding user according to the received signaling identifier of the user-related control signaling and the corresponding S1 connection information. If the user belongs to the user served by the mobile-cut RN, the DeNB2 Find the corresponding mode information. When DeNB2 finds that the corresponding processing mode is the forwarding mode, DeNB2 forwards the user-related control signaling to the RN.
  • the DeNB2 searches for the corresponding user according to the received signaling identifier of the user-related control signaling and the corresponding S1 connection information, if the user belongs to the handover access.
  • the user served by the RN the DeNB2 searches for the corresponding mode information.
  • DeNB2 finds that the corresponding processing mode is the forwarding mode, DeNB2 forwards the user-related control signaling to the RN initial access base station DeNB1.
  • the DeNB1 After receiving the user-related control signaling, the DeNB1 searches for the corresponding user according to the received signaling identifier of the user-related control signaling and the corresponding S1 connection information.
  • DeNB1 searches for corresponding mode information. When the DeNB1 finds that the corresponding processing mode is the modified mode, the DeNB1 modifies the user-related control signaling, and the specific modification includes modifying the control signaling identifier, modifying the transport network layer address and the tunnel endpoint identifier, and then the user-related control signaling. Forward to the mobile management entity corresponding to the user.
  • the relay node RN initially accesses the DeNB 1 and performs Un-port communication through the DeNB 1.
  • the relay node RN performs scanning measurement on neighboring neighboring base stations in the process of moving, and sends a measurement report to the DeNB 1.
  • the DeNB 1 determines that the RN needs to perform handover.
  • the DeNB 1 selects the DeNB 2 as the target base station, and transmits a handover request message to the DeNB 2, where the handover request message includes control signaling identifier mapping information and processing mode information related to the user served by the RN.
  • the processing mode is a modification mode that requires the DeNB2 to perform a modification operation. Accordingly, the DeNB1 sets its corresponding control signaling processing mode related to the user served by the RN to the forwarding mode.
  • the DeNB 2 After receiving the handover request message sent by the DeNB 1, the DeNB 2 stores the user-related control signaling identifier mapping information, the mode information, and the relay node information to be handed over, and then transmits a handover confirmation message to the DeNB1.
  • the RN After the RN completes the handover, if the DeNB1 receives the user-related control signaling sent by the mobility management entity, the DeNB1 searches for the corresponding user according to the received signaling identifier of the user-related control signaling and the corresponding S1 connection information, if the user belongs to the user. The user served by the RN that has switched, the DeNB1 searches for the corresponding mode information.
  • DeNB1 When DeNB1 finds that the corresponding processing mode is the forwarding mode, DeNB1 forwards the user-related control signaling to DeNB2. After receiving the user-related control signaling, the DeNB2 searches for the corresponding user according to the received signaling identifier of the user-related control signaling and the corresponding S1 connection information. If the user belongs to the user served by the mobile-cut RN, the DeNB2 Find the corresponding mode information. When the DeNB2 finds that the corresponding processing mode is the modified mode, the DeNB2 modifies the user-related control signaling, and the specific modification includes modifying the control signaling identifier, modifying the transport network layer address and the tunnel endpoint identifier, and then the user-related control signaling. Forward to RN.
  • the DeNB2 if the DeNB2 receives the user-related control signaling sent by the RN, the DeNB2 searches for the corresponding user according to the received signaling identifier of the user-related control signaling and the corresponding S1 connection information, if the user belongs to the handover access. The user served by the RN, the DeNB2 searches for the corresponding mode information. When the DeNB2 finds that the corresponding processing mode is the modified mode, the DeNB2 modifies the user-related control signaling, and the specific modification includes modifying the control signaling identifier, modifying the transport network layer address and the tunnel endpoint identifier, and then the user-related control signaling. Forwarded to the RN initial access base station DeNB1.
  • the DeNB1 After receiving the user-related control signaling, the DeNB1 searches for a corresponding user according to the received signaling identifier of the user-related control signaling and the corresponding S1 connection information, and if the user belongs to the user served by the mobile switching RN, DeNB1 searches for corresponding mode information. The DeNB1 finds that the corresponding processing mode is the modified mode, and the DeNB1 forwards the user-related control signaling to the mobility management entity.
  • the source base station sends the user-related control signaling identifier mapping information to the target base station, and the target base station updates the user-related control signaling identifier mapping information and feeds back to the source base station.
  • the source base station and the target base station process the control signaling according to the respective user-related control signaling identifier mapping information.
  • the relay node RN initially accesses the DeNB 1 and performs Un-port communication through the DeNB 1. During the process of moving, the relay node RN performs scanning measurement on neighboring neighboring base stations and sends a measurement report. Reported to DeNB 1. Based on the received measurement report, the DeNB 1 determines that the RN needs to perform handover. The DeNB 1 selects the DeNB 2 as the target base station, and sends a handover request message to the DeNB 2, where the handover request message includes control signaling identifier mapping information related to the user served by the RN.
  • the DeNB2 After receiving the handover request message sent by the DeNB1, the DeNB2 determines whether to collide with the existing user-related control signaling identifier of the DeNB2 according to the received user-related control signaling identifier mapping information, and if a collision occurs, the DeNB2 allocates a new control.
  • the signaling identifier is sent to the DeNB1 through a handover request acknowledgement message. If the DeNB1 receives the newly allocated user-related control signaling identifier mapping information, the DeNB1 forwards the information to the relay node RN, and the relay node RN maps the information according to the received newly allocated user-related control signaling identifier. Correspondingly updating user-related control signaling identifier information.
  • the RN transmits the relevant S1 control signaling according to the updated user-related control signaling identifier. If the DeNB2 receives the user-related control signaling sent by the RN, the DeNB2 searches for the corresponding user according to the received signaling identifier of the user-related control signaling. If the user belongs to the user served by the RN that switches the access, the DeNB2 The user-related control signaling is modified. The specific modification includes modifying the control signaling identifier, modifying the transport network layer address and the tunnel endpoint identifier, and then forwarding the user-related control signaling to the RN initial access base station DeNB1.
  • the DeNB1 After receiving the user-related control signaling, the DeNB1 searches for the corresponding user according to the received signaling identifier of the user-related control signaling. If the user belongs to the user served by the mobile-switched RN, the DeNB1 controls the user. The signaling is modified. The specific modification includes modifying the control signaling identifier, modifying the transport network layer address and the tunnel endpoint identifier, and then forwarding the user-related control signaling to the mobility management entity corresponding to the user.
  • the DeNB1 if the DeNB1 receives the user-related control signaling sent by the mobility management entity, the DeNB1 searches for the corresponding user according to the received signaling identifier of the user-related control signaling, if the user belongs to the RN that has been switched.
  • the user, D, DeNB1 modifies the user-related control signaling, and the specific modification includes modifying the control signaling identifier, modifying the transport network layer address and the tunnel endpoint identifier, and then forwarding the user-related control signaling to the DeNB2.
  • the DeNB2 After receiving the user-related control signaling, the DeNB2 searches for the corresponding user according to the received signaling identifier of the user-related control signaling.
  • the DeNB2 controls the user.
  • the modification is made, and the specific modification includes modifying the control signaling identifier, modifying the transport network layer address and the tunnel endpoint identifier, and then forwarding the user-related control signaling to the relay node.
  • the source base station sends the user-related control signaling identifier mapping information to the target base station, and the target base station updates the user-related control signaling identifier mapping information and feeds back to the source base station. And relay nodes. After the relay node completes the handover, the target base station processes the control signaling according to the user-related control signaling identifier mapping information.
  • the relay node RN initially accesses the DeNB 1 and performs Un-port communication through the DeNB 1. During the process of the mobile node, the RN performs scanning measurement on neighboring neighboring base stations and sends a measurement report to the DeNB 1. Based on the received measurement report, the DeNB 1 determines that the RN needs to perform handover. The DeNB 1 selects the DeNB 2 as the target base station, and sends a handover request message to the DeNB 2, where the handover request message includes control signaling identifier mapping information related to the user served by the RN.
  • the DeNB2 After receiving the handover request message sent by the DeNB1, the DeNB2 determines whether to collide with the existing user-related control signaling identifier of the DeNB2 according to the received user-related control signaling identifier mapping information, and if a collision occurs, the DeNB2 allocates a new control.
  • the signaling identifier is sent to the DeNB1 through the handover request acknowledgement message, and the DeNB1 further forwards the information to the relay node RN, and the relay node RN performs corresponding update according to the newly allocated user-related control signaling identifier mapping information.
  • User related control signaling identifier information User related control signaling identifier information.
  • the DeNB 2 may update the user-related control signaling identifier information held in the mobility management entity by performing a path switch update for the user served by the relay node. After completing the handover, the relay node RN transmits the relevant S1 control signaling according to the updated user-related control signaling identifier. If the DeNB2 receives the user-related control signaling sent by the RN, the DeNB2 searches for the corresponding user according to the received signaling identifier of the user-related control signaling. If the user belongs to the user served by the RN that switches the access, the DeNB2 The user-related control signaling is modified.
  • the specific modification includes modifying the control signaling identifier, modifying the transport network layer address and the tunnel endpoint identifier, and then forwarding the user-related control signaling to the mobility management entity corresponding to the user.
  • the DeNB2 receives the user-related control signaling sent by the mobility management entity,
  • the DeNB2 searches for the corresponding user according to the received signaling identifier of the user-related control signaling. If the user belongs to the user served by the RN, the DeNB2 modifies the user-related control signaling, and the specific modification includes modifying the control signaling identifier. , modify the transport network layer address and tunnel endpoint identifier, User-related control signaling is then forwarded to the relay node.
  • the source base station is notified of the control signaling identifier mapping information to the target base station, and the simple identifier mapping or update is performed to ensure smooth forwarding execution of the S1 signaling process related to the user, and the relay node is reduced. The impact of handover on control signaling.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de traitement de signalisation pour la commutation de nœud de relais. La station de base source à laquelle le nœud de relais appartient envoie les informations de mappage d'identificateurs de signalisation de commande d'utilisateurs gérés par le nœud de relais à une station de base cible vers laquelle le nœud de relais commutera. Après que le nœud de relais commute vers la station de base cible à partir de la station de base source, la station de base source et/ou la station de base cible traitent la signalisation de commande d'utilisateur reçue selon les informations de mappage. L'invention concerne également un système correspondant. En amenant la station de base source à informer la station de base cible des informations de mappage d'identificateurs de signalisation de commande, et à l'aide du simple mappage ou de la simple mise à jour des identificateurs, l'invention assure une performance de transfert réussie du flux de signalisation S1 relatif à des utilisateurs, et réduit l'influence pour la signalisation de commande provoquée par la commutation de nœud de relais.
PCT/CN2012/073918 2011-06-10 2012-04-12 Procédé et système de traitement de signalisation pour une commutation de nœud de relais Ceased WO2012167665A1 (fr)

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