WO2012119469A1 - 小区切换的处理方法及装置 - Google Patents
小区切换的处理方法及装置 Download PDFInfo
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- WO2012119469A1 WO2012119469A1 PCT/CN2011/083584 CN2011083584W WO2012119469A1 WO 2012119469 A1 WO2012119469 A1 WO 2012119469A1 CN 2011083584 W CN2011083584 W CN 2011083584W WO 2012119469 A1 WO2012119469 A1 WO 2012119469A1
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- Prior art keywords
- cell
- base station
- information
- handover
- request message
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000012545 processing Methods 0.000 claims description 27
- 230000008569 process Effects 0.000 claims description 5
- 230000000717 retained effect Effects 0.000 claims 1
- JZEPSDIWGBJOEH-UHFFFAOYSA-N 4-decylbicyclo[2.2.1]hept-2-ene Chemical compound C1CC2C=CC1(CCCCCCCCCC)C2 JZEPSDIWGBJOEH-UHFFFAOYSA-N 0.000 description 84
- 238000005259 measurement Methods 0.000 description 10
- 230000003993 interaction Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/19—Connection re-establishment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
-
- 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 communications, and in particular to a method and apparatus for processing cell handover.
- BACKGROUND OF THE INVENTION In order to meet the growing demand for large bandwidth and high speed mobile access, the third generation partner organization plan (Third)
- LTE-Advanced Long-Term Evolution advance
- LTE-Advanced retains the core of LTE for the evolution of Long-Term Evolution (LTE).
- LTE-Advanced retains the core of LTE for the evolution of Long-Term Evolution (LTE).
- LTE-Advanced retains the core of LTE for the evolution of Long-Term Evolution (LTE).
- LTE-Advanced a series of technologies are used to expand the frequency domain and airspace to improve spectrum utilization and increase the 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 services in hotspots, and save user equipment (User Equipment, referred to as UE) transmit power.
- 1 is a schematic diagram of a network structure using a wireless relay technology according to the related art. As shown in FIG.
- a relay node provides a function and service similar to that of a normal eNB for a UE accessing a cell.
- the eNB serving the RN is also referred to as a donor base station (Donor eNB, referred to as De B).
- the source base station selects a target cell according to the measurement report of the UE.
- One or more cells under the target base station to which the target cell belongs are potential reestablished cells, and the cell reconstruction necessary information is included in the radio resource control context (Radio Resource Control Context/Container) in the handover request (HANDOVER REQUEST/REQUIRED) message. Referred to as RRC Context/Container) in the Additional Restablnfo List.
- the cell selection is performed again, and the selected cell is initiated to be reconstructed. If the reselected cell happens to exist in the additional reconstruction information list as described above, the reconstruction may be successful because the target base station already has the information necessary for the UE to reestablish the cell (if the target base station does not have If the UE reconstructs the necessary information for the cell, the reconstruction must be a failure). Therefore, the system achieves good mobile performance.
- the RN is deployed in the network, the source cell selected by the source base station according to the measurement report of the UE may belong to different base stations (DeNB and RN).
- the re-selected potential re-established cell exists after the handover failure exists in the additional re-establishment information list as described above, since it does not belong to the same base station as the target cell, the re-selected potential re-established cell corresponds to The base station does not have the information necessary for cell reconstruction, so the reconstruction must be a failure.
- the present invention provides a method and a device for processing a cell handover, so as to at least solve the problem that the source base station selects a target cell and all or part of the potential rebuilt cells according to the measurement report of the UE in the case where the RN is deployed in the related art. It belongs to different base stations, which leads to the problem of failure of reconstruction of potential reconstructed cells.
- a processing method of cell handover includes: receiving, by the base station, a handover request message; acquiring an additional reconstruction information list in the handover request message; determining that the additional reconstruction information list includes a cell that does not belong to itself; The necessary information for reconstruction is sent to the base station to which the cell belongs.
- the information about the re-establishment of the cell that does not belong to the cell to which the cell belongs is: when the base station is the RN and the target cell is the cell of the RN, the RN sends the re-establishment required information of the cell that does not belong to the RN to the RN.
- the DeNB sends the necessary information for reconstruction of the cell that does not belong to itself to the base station to which the cell belongs.
- the method further includes: determining that the additional re-establishment information list includes a cell belonging to itself; and retaining re-establishment required information of the cell.
- the method further includes: determining that the cell handover fails; and the base station to which the cell belongs performs RRC connection reestablishment using the received reestablishment required information.
- the handover request message includes one of the following: an S1 handover request message, and an X2 handover request message.
- the reconstruction necessary information includes: a cell identifier, a key derived by the source base station and the UE, and a parameter for identifying the UE in the RRC connection re-establishment process.
- the reestablishment required information further includes at least one of the following: a mobility management entity UE S1 application identifier, security aspect information, a radio access bearer setup list, UE radio access capability information, an access stratum configuration, and a handover restriction list.
- the base station includes one of the following: De B, RNo
- a processing apparatus for cell handover is provided.
- the processing device for cell handover includes: a receiving module, configured to receive a handover request message; an obtaining module, configured to acquire an additional reconstruction information list in the handover request message; and a first determining module configured to determine the additional reconstruction information list A cell that does not belong to itself is included; a sending module is configured to send, to the base station to which the cell belongs, the information necessary for reconstruction of the cell that does not belong to the cell.
- the sending module includes: a sending submodule, where the target cell is a cell of the RN, and is configured to send the reestablishment necessary information of the cell that does not belong to itself to the De B to which the RN belongs.
- the processing device for the cell handover further includes: a second determining module, configured to determine that the additional re-establishment information list includes a cell belonging to itself; and a reservation module, configured to reserve re-establishment required information of the cell belonging to the cell.
- the present invention can improve the reestablishment success rate in the network in which the RN is deployed by distinguishing whether the potential reestablished cell belongs to the target base station or the other base station, and then sends the cell reestablishment necessary information of the cell belonging to the other base station to the base station to which the cell belongs. Guaranteed good mobile performance.
- FIG. 1 is a schematic diagram of a network structure using a wireless relay technology according to the related art
- FIG. 2 is a flowchart of a method for processing cell handover according to an embodiment of the present invention
- FIG. 3 is a preferred embodiment according to the present invention.
- FIG. 4 is an interaction flowchart of a method for processing cell handover according to a preferred embodiment 2 of the present invention
- FIG. 5 is a flowchart of a method for processing cell handover according to a preferred embodiment 3 of the present invention
- FIG. 6 is an interaction flowchart of a method for processing a cell handover according to a preferred embodiment 4 of the present invention
- FIG. 7 is a structural block diagram of a processing device for cell handover according to an embodiment of the present invention.
- Step S202 The base station receives the handover request message.
- Step S204 Acquire an additional reconstruction information list in the handover request message.
- Step S206 determining that the additional reconstruction information list includes a cell that does not belong to itself.
- Step S208 the information necessary for reconstruction of the cell that does not belong to itself is sent to the base station to which the cell belongs.
- the source cell selected by the source base station according to the measurement report of the UE may belong to different base stations and all or part of the potential reestablished cells, thereby causing the reconstruction of the potential reconstructed cell to fail.
- the embodiment of the present invention by distinguishing whether the potential reestablished cell belongs to the target base station or the other base station, and then transmitting the cell reestablishment necessary information of the cell belonging to the other base station to the base station to which the cell belongs, thereby improving the network in which the RN is deployed. Rebuild success rate and ensure good mobile performance. The reason why the source base station cannot distinguish whether the target cell and the potential reestablished cell belong to the same base station is described in detail below.
- the source base station decides to switch to the De B or the RN cell according to the measurement report of the next UE, and selects the target cell and the potential reestablished cell according to the measurement report, then Regardless of whether the target cell and the potential re-established cell belong to the DeNB or the RN, respectively, the cells belong to the DeNB from the perspective of the source base station, because the RN and the DeNB have the same e B B Identifier (eNB ID), so the source The base station "cannot see" the legs under the DeNB.
- eNB ID e B B Identifier
- the information about the reestablishment necessary for the cell that does not belong to the cell to be sent to the cell to which the cell belongs includes: when the base station is the RN and the target cell is the cell of the RN, the RN sends the re-establishment required information of the cell that does not belong to the cell to the cell
- the DeNB to which the RN belongs the DeNB transmits the reestablishment necessary information of the cell that does not belong to itself to the base station to which the cell belongs.
- the base station to which the cell belongs may be other legs than the RN under the DeNB.
- the method further includes: determining that the additional reconstruction information list includes a cell belonging to the self; and retaining the reestablishment required information of the cell.
- the method further includes: determining that the cell handover fails; and the base station to which the cell belongs performs RRC connection reestablishment using the received reestablishment necessary information.
- the handover request message includes one of the following: an S1 handover request message, and an X2 handover request message.
- the cell reconstruction necessary information includes: a cell identity, a key derived by the source base station and the UE (Ke B* ), and a parameter for identifying the UE in the RRC connection re-establishment process (short MAC-I) ).
- the cell reestablishment required information further includes at least one of the following: a mobility management entity UE S1 application identifier (MME UE S1AP ID), security aspect information, and a radio access bearer establishment list (E-RABs To Be Setup List ), UE radio access capability information (ue-Radio Access Capability Info), access layer configuration (as-Config), and handover restriction list (Handover Restriction List).
- the cell reconstruction necessary information in the preferred embodiment belongs to UE context information (UE Context Information).
- the target base station comprises one of the following: De B, RN.
- the source base station comprises one of the following: normal e B, De B, RN. The implementation process of the embodiment of the present invention will be described in detail below with reference to examples.
- the source base station when a handover is performed in a network in which the RN is deployed, the source base station (referring to the normal e B or RN) selects one target cell and one or more potential reestablished cells from the measurement report of the UE.
- the selected cells belong to the target DeNB.
- the source base station includes the information of these cells in the handover request message and sends it to the target De B.
- the DeNB receives the handover request message and learns the additional reconstruction information list. If there is an RN cell (the RN under the target DeNB), the DeNB forwards the necessary reconfiguration information related to the RN cells to the respective cells. Corresponding RN (If there is a cell belonging to the DeNB itself in the additional reconstruction information list, the DeNB will retain this information).
- the DeNB receives the handover request message and learns the additional reconstruction information list. If the RN cell (the RN under the target DeNB) exists, the DeNB may also The RRC is directly forwarded to the RN corresponding to the cell, thereby avoiding screening of information necessary for reconstruction related to the RN cell, and improving forwarding efficiency. If the UE fails to handover to the target cell, the UE reselects the cell and initiates reconstruction for the selected cell. If the UE chooses to initiate a reconstruction for the potential reestablished cell as described above, then since the base station already has the information necessary for the UE to reconstruct the cell, the reconstruction may be successful (otherwise it must fail). FIG.
- Step 301 When the source base station initiates the X2 handover, the source base station sends a handover request message (HANDOVER REQUEST) to the target DeNB, where the message includes the target cell and the additional reconstruction information list.
- the target cell is a DeNB cell
- the additional re-establishment information list includes the cell of the RN under the DeNB, but the source base station cannot distinguish between the two cells, and is considered to be a DeNB cell.
- the source base station sends a handover request message (HANDOVER REQUIRED) to the MME, and the MME sends a handover request message (HANDOVER REQUEST) to the target DeNB.
- HANDOVER REQUIRED a handover request message
- MME sends a handover request message (HANDOVER REQUEST) to the target DeNB.
- HANDOVER REQUEST a handover request message from which the target cell and the list of additional reconstruction information can be known.
- Step 303 If there is a cell belonging to the RN under the DeNB in the list (when the source base station is an RN under the DeNB, and there may be a cell established by another RN under the DeNB in the list of additional reconstruction information in the X2 handover request message), the DeNB The reconstruction necessary information as described above is forwarded (with no strict timing constraints to the reply handover request acknowledgement message) to the RNs corresponding to these cells (possibly corresponding to multiple RNs under the DeNB). If there is a cell belonging to the DeNB itself in the additional reconstruction information list, the DeNB retains this information. Step 303: If the UE fails to handover to the target cell, the UE reselects the cell and initiates reconstruction on the selected cell.
- the re-establishment may be successful (otherwise it must fail) because the RN already has the information necessary for the re-establishment of the cell by the UE.
- the source base station referring to the normal e B or RN
- the source base station includes the information of these cells in the handover request message and sends it to the target De B.
- the target cell is a DeNB cell
- the DeNB receives the handover request message and learns from the additional reconstruction
- the information list if there is an RN cell (the RN under the target DeNB), the DeNB forwards the necessary information about the reconstruction related to the RN cells to the corresponding RN of the cell (if there is a cell belonging to the DeNB itself in the additional reconstruction information list, the DeNB Will retain this information). If the UE fails to handover to the target cell, the UE reselects the cell and initiates reconstruction for the selected cell.
- FIG. 4 is an interaction flowchart of a method for processing cell handover according to a second embodiment of the present invention. As shown in FIG. 4, the following steps 401 to 403 are included. Step 401: When the source base station initiates an X2 handover, the source base station sends a handover request message (HANDOVER REQUEST) to the target DeNB.
- a handover request message HANDOVER REQUEST
- the source base station sends a handover request message (HANDOVER REQUIRED) to the MME, and the MME sends a handover request message (HANDOVER) to the target DeNB.
- HANDOVER REQUIRED a handover request message
- HANDOVER a handover request message
- Step 402 The target DeNB receives the handover request message, from which the target cell and the additional reconstruction information list are known. If there is a cell belonging to the RN under the DeNB in the list (when the source base station is an RN under the DeNB, and there may be a cell established by another RN under the DeNB in the list of additional reconstruction information in the X2 handover request message), the DeNB The reconstruction necessary information as described above is forwarded (with no strict timing constraints to the reply handover request acknowledgement message) to the RNs corresponding to these cells (possibly corresponding to multiple RNs under the DeNB). If there is a cell belonging to the DeNB itself in the additional reconstruction information list, the DeNB retains this information.
- Step 403 If the UE fails to handover to the target cell, the UE reselects the cell and initiates reestablishment on the selected cell. If the UE chooses to initiate the re-establishment of the RN cell as described above, the re-establishment may be successful (otherwise it must fail) because the RN already has the information necessary for the re-establishment of the cell by the UE.
- the source base station referring to the normal e B or RN selects one target cell and one or more potential reestablished cells from the measurement report of the UE.
- the selected cells belong to the DeNB in the view of the source base station. That is, even if the target cell is an RN cell, the source base station only considers that the cell is a DeNB, that is, the information of the cells is still included in the handover request message and sent to the target De B. In this case, after receiving the handover request message, the DeNB may obtain the target cell and the additional reconstruction information list, and forward the handover request message and the reconstruction necessary information to the RN corresponding to the cell according to the information of the cells respectively (if additional reconstruction is performed) The information list has cells belonging to the DeNB itself, and the DeNB retains this information).
- the DeNB may directly forward the message to its corresponding RN according to the target cell ID after receiving the handover request message. After receiving the handover request message, the RN obtains an additional re-establishment information list. If there is a cell that does not belong to itself, the RN returns the re-establishment necessary information of the cells to the DeNB, and the DeNB reconstructs the necessary information according to the cell information. Reserved or forwarded to the corresponding RN. If the UE fails to handover to the target cell, the UE reselects the cell and initiates reconstruction for the selected cell.
- FIG. 5 is an interaction flowchart of a method for processing a cell handover according to a preferred embodiment of the present invention. As shown in FIG. 5, the following steps 501 to 503 are included. Step 501: When the source base station initiates an X2 handover (or an S1 handover), the source base station (ordinary eNB or RN) sends a handover request message (HANDOVER REQUEST) to the DeNB, where the message includes the target cell and the additional reconstruction information list.
- X2 handover or an S1 handover
- the source base station ordinary eNB or RN
- HANDOVER REQUEST a handover request message
- the target cell is an RN cell
- the additional re-establishment information list may include a cell of the DeNB to which the target RN belongs and a cell of another RN under the DeNB, but the source base station cannot distinguish between the two cells, and is considered to be both DeNB cells.
- Step 502 When the target cell is an RN cell, after receiving the handover request message, the DeNB learns that the target cell is a cell of the RN, but obtains an additional reconstruction information list from the message.
- the DeNB forwards the necessary information for re-establishment (with no strict timing constraints to the reply handover request acknowledgement message) to the RN corresponding to these cells (possibly corresponding to the DeNB respectively) RN, if there is a cell belonging to the DeNB itself in the additional reconstruction information list, the DeNB will retain this information).
- the additional reconstruction information list in the handover request message sent by the DeNB to the target RN does not contain a cell that does not belong to the target RN. Step 503: If the handover of the UE to the target cell fails, the UE reselects the cell and initiates reconstruction for the selected cell.
- the source base station selects one target cell and one or more potential reestablished cells by the measurement report of the UE. Because the eNB ID of the RN and the DeNB are the same, whether the target cell is actually a DeNB cell or an RN cell, the selected cells belong to the DeNB in the view of the source base station.
- the source base station only considers that the cell is a DeNB, that is, the information of the cells is still included in the handover request message and sent to the target De B.
- the DeNB may obtain the target cell and the additional reconstruction information list, and forward the handover request message and the reconstruction necessary information to the RN corresponding to the cell according to the information of the cells respectively (if additional reconstruction is performed)
- the information list has cells belonging to the DeNB itself, and the DeNB retains this information). Because the current target cell is an RN cell, the DeNB may directly forward the message to its corresponding RN according to the target cell ID after receiving the handover request message.
- the RN After receiving the handover request message, the RN obtains an additional re-establishment information list. If there is a cell that does not belong to itself, the RN returns the re-establishment necessary information of the cells to the DeNB, and the DeNB reconstructs the necessary information according to the cell information. Reserved or forwarded to the corresponding RN. If the UE fails to handover to the target cell, the UE reselects the cell and initiates reconstruction for the selected cell. If the UE chooses to initiate a reconstruction for the potential reestablished cell as described above, then since the base station already has the information necessary for the UE to reconstruct the cell, the reconstruction may be successful (otherwise it must fail). FIG.
- Step 601 When the source base station initiates an X2 handover (may also be an S1 handover), the source base station sends a handover request message (HANDOVER REQUIRED) to the MME, and the MME sends a handover request message (HANDOVER REQUEST) to the target DeNB.
- HANDOVER REQUIRED handover request message
- MME handover request message
- HANDOVER REQUEST handover request message
- the source base station is an RN, according to the Relay architecture, it will belong to The DeNB is regarded as the MME, that is, the function of the DeNB as its proxy MME. That is, the MME is actually the DeNB to which the source RN belongs, and the real MME between the DeNB and the target DeNB must also pass the handover message.
- the target cell is an RN cell
- the DeNB forwards the message to the target RN according to the target cell ID in the handover request message.
- the target RN learns the additional reconstruction information list from the message, and if there is a cell that does not belong to itself, the RN will The reconfiguration necessary information corresponding to the cell is transmitted back to the DeNB (there is no strict timing restriction with the reply handover request acknowledgement message, and may even be carried in the handover Request acknowledgment message).
- DeNB After receiving the information, the cell information for their own reservation, the necessary information for rebuilding the cell belonging to other cells of the RN forwards the corresponding RN. Step 603: If the handover of the UE to the target cell fails, the UE reselects the cell and initiates a reestablishment of the selected cell.
- the UE chooses to initiate a reestablishment for the potential reestablished cell as described above, then since the base station already has the information necessary for the UE to reconstruct the cell, the reestablishment may be successful (otherwise it must fail).
- the steps shown in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and, although the logical order is shown in the flowchart, in some cases, The steps shown or described may be performed in an order different than that herein.
- the embodiment of the present invention provides a processing device for cell handover, where the processing device for cell handover can be applied to a base station, and the processing device for the cell handover can be used to implement the method for processing the cell handover.
- FIG. 7 is a structural block diagram of a processing apparatus for cell handover according to an embodiment of the present invention.
- the method includes a receiving module 72, an obtaining module 74, a first determining module 76, and a sending module 78.
- the receiving module 72 is configured to receive a handover request message.
- the obtaining module 74 is connected to the receiving module 72, and is configured to obtain an additional reconstruction information list in the handover request message received by the receiving module 72.
- the first determining module 76 is connected to the obtaining module 74.
- the additional reconstruction information list obtained by the determining acquisition module 74 includes a cell that does not belong to itself; the sending module 78 is connected to the first determining module 76, and is configured to determine, in the first determining module 76, the additional reconstruction acquired by the obtaining module 74. After the information list includes a cell that does not belong to itself, the cell reconstruction necessary information that does not belong to itself is sent to the base station to which the cell belongs.
- the sending module 78 includes: a sending submodule 782, configured to send the reestablishment required information of the cell not belonging to itself to the host base station De B to which the RN belongs, in the case that the target cell is the cell of the relay node RN.
- the processing device for cell handover further includes a second determining module 710 and a reservation module 712.
- the structure is described in detail below.
- the second determining module 710 is configured to determine that the additional re-establishment information list includes a cell belonging to itself; and the reservation module 712 is configured to reserve re-establishment required information of the cell belonging to the self.
- the processing device for the cell handover described in the device embodiment corresponds to the foregoing method embodiment, and the specific implementation process has been described in detail in the method embodiment, and details are not described herein again.
- a method and an apparatus for processing cell handover are provided.
- the present invention distinguishes the cell by the target base station, and then sends the cell reestablishment necessary information of the cell that does not belong to the target base station to the base station to which the cell belongs, thereby improving the reestablishment success rate in the network where the RN is deployed, and ensuring that the cell is good.
- Mobile performance Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices.
- the invention is not limited to any specific combination of hardware and software.
- the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.
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Abstract
本发明公开了一种小区切换的处理方法及装置,该方法包括:基站接收到切换请求消息;获取切换请求消息中的附加重建信息列表;确定附加重建信息列表中包含有不属于自身的小区;将不属于自身的小区的重建必需信息发送给该小区所属的基站。本发明可以提高部署有RN的网络中的重建成功率,保证其良好的移动性能。
Description
小区切换的处理方法及装置 技术领域 本发明涉及通信领域, 具体而言, 涉及一种小区切换的处理方法及装置。 背景技术 为了满足日益增长的大带宽高速移动接入的需求, 第三代伙伴组织计划 (Third
Generation Partnership Projects, 简称 3GPP) 推出高级长期演进 (Long-Term Evolution advance,简称 LTE- Advanced)标准。 LTE- Advanced对于长期演进(Long-Term Evolution, 简称 LTE) 的演进保留了 LTE的核心, 并在此基础上采用了一系列技术对频域、 空域 进行扩充, 以达到提高频谱利用率、 增加系统容量等目的。 无线中继 (Wireless Relay) 技术即 LTE-Advanced中的技术之一, 旨在扩展小区 的覆盖范围、 减少通信中的死角地区、 平衡负载、 转移热点地区的业务和节省用户设 备 (User Equipment, 简称 UE) 的发射功率。 图 1是根据相关技术的利用无线中继技术的网络结构的示意图, 如图 1所示, 中 继节点(Relay Node, 简称 RN)对接入其小区的 UE提供与普通 eNB类似的功能和服 务, 又通过无线接口以类似于普通 UE的方式接入一个服务于它的 e B, 服务于 RN 的 eNB称为宿主基站 (Donor eNB, 简称 De B)。 在 LTE系统中, 源基站根据 UE的测量上报, 选择一个目标小区。 目标小区所属 的目标基站下的一个或多个小区作为潜在重建小区, 其小区重建必需信息一并包含在 切换请求 (HANDOVER REQUEST/REQUIRED) 消息内的无线资源控制内容 (Radio Resource Control Context/ Container, 简称 RRC Context/Container) 中的附加重建信息 列表 (Additional Restablnfo List) 中。 如果 UE向目标小区的切换失败, 则重新进行小区选择, 并对选择到的小区发起 重建。 若重新选择的这个小区恰好存在于如上所述的附加重建信息列表中, 则因该目 标基站已具有 UE向该小区重建所必需的信息, 所以该重建可能是成功的 (如果该目 标基站不具有 UE向该小区重建所必需的信息, 则该重建必然是失败的)。 因此, 系统 获得了良好的移动性能。
考虑到网络中部署有 RN的情况下, 源基站根据 UE的测量上报选择的目标小区 与全部或部分潜在重建小区可能分属于不同的基站 (DeNB和 RN)。 在这种情况下, 虽然切换失败后重新选择的潜在重建小区存在于如上所述的附加重建信息列表中, 但 是, 由于其与目标小区不属于同一基站, 则该重新选择的潜在重建小区对应的基站不 具有小区重建必需信息, 所以该重建必然是失败的。 发明内容 本发明提供了一种小区切换的处理方法及装置, 以至少解决相关技术中在部署有 RN的情况下,源基站根据 UE的测量上报选择的目标小区与全部或部分潜在重建小区 可能分属于不同的基站, 从而导致对潜在重建小区的重建失败的问题。 为了实现上述目的, 根据本发明的一个方面, 提供了一种小区切换的处理方法。 根据本发明的小区切换的处理方法包括: 基站接收到切换请求消息; 获取切换请 求消息中的附加重建信息列表; 确定附加重建信息列表中包含有不属于自身的小区; 将不属于自身的小区的重建必需信息发送给该小区所属的基站。 将不属于自身的小区的重建必需信息发送给该小区所属的基站包括:在基站是 RN 并且目标小区是 RN的小区的情况下, RN将不属于自身的小区的重建必需信息发送给 RN所属的 DeNB; DeNB将不属于自身的小区的重建必需信息发送给该小区所属的基 站。 在获取切换请求消息中的附加重建信息列表之后, 上述方法还包括: 确定附加重 建信息列表中包含有属于自身的小区; 保留该小区的重建必需信息。 在保留属于自身的小区的重建必需信息之后, 上述方法还包括: 确定小区切换失 败; 小区所属的基站使用接收到的重建必需信息进行 RRC连接重建。 切换请求消息包括以下之一: S1切换请求消息、 X2切换请求消息。 重建必需信息包括: 小区标识、 由源基站和 UE派生的密钥、 用于在 RRC连接重 建立过程中识别鉴定 UE的参数。 重建必需信息还包括以下至少之一: 移动性管理实体 UE S1应用标识、 安全方面 信息、 无线接入承载建立列表、 UE无线接入能力信息、 接入层配置、 切换限制列表。 基站包括以下之一: De B、 RNo
为了实现上述目的,根据本发明的另一个方面,提供了一种小区切换的处理装置。 根据本发明的小区切换的处理装置包括: 接收模块, 设置为接收切换请求消息; 获取模块, 设置为获取切换请求消息中的附加重建信息列表; 第一确定模块, 设置为 确定附加重建信息列表中包含有不属于自身的小区; 发送模块, 设置为将不属于自身 的小区的重建必需信息发送给该小区所属的基站。 发送模块包括: 发送子模块, 在目标小区是 RN的小区的情况下, 设置为将不属 于自身的小区的重建必需信息发送给 RN所属的 De B。 上述小区切换的处理装置还包括: 第二确定模块, 设置为确定附加重建信息列表 中包含有属于自身的小区; 保留模块, 设置为保留属于自身的小区的重建必需信息。 本发明通过区分潜在重建小区是属于目标基站还是属于其它基站, 然后将属于其 它基站的小区的小区重建必需信息发送到该小区所属的基站,从而可以提高部署有 RN 的网络中的重建成功率, 保证其良好的移动性能。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部分, 本发 明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的不当限定。 在附图 中: 图 1是根据相关技术的利用无线中继技术的网络结构的示意图; 图 2是根据本发明实施例的小区切换的处理方法的流程图; 图 3是根据本发明优选实施例一的小区切换的处理方法的交互流程图; 图 4是根据本发明优选实施例二的小区切换的处理方法的交互流程图; 图 5是根据本发明优选实施例三的小区切换的处理方法的交互流程图; 图 6是根据本发明优选实施例四的小区切换的处理方法的交互流程图; 图 7是根据本发明实施例的小区切换的处理装置的结构框图。
具体实施方式 需要说明的是, 在不冲突的情况下, 本申请中的实施例及实施例中的特征可以相 互组合。 下面将参考附图并结合实施例来详细说明本发明。 本发明提供了一种小区切换的处理方法, 图 2是根据本发明实施例的小区切换的 处理方法的流程图, 如图 2所示, 包括如下的步骤 S202至步骤 S208。 步骤 S202, 基站接收到切换请求消息。 步骤 S204, 获取切换请求消息中的附加重建信息列表。 步骤 S206, 确定附加重建信息列表中包含有不属于自身的小区。 步骤 S208, 将不属于自身的小区的重建必需信息发送给该小区所属的基站。 相关技术中, 在部署有 RN的情况下, 源基站根据 UE的测量上报选择的目标小 区与全部或部分潜在重建小区可能分属于不同的基站, 从而导致对潜在重建小区的重 建失败。本发明实施例中,通过区分潜在重建小区是属于目标基站还是属于其它基站, 然后将属于其它基站的小区的小区重建必需信息发送到该小区所属的基站, 从而可以 提高部署有 RN的网络中的重建成功率, 并保证其良好的移动性能。 下面对源基站不能区分该目标小区与该潜在重建小区是否属于相同的基站的原因 进行详细说明。 在部署了可以建立自身小区的 RN的网络中, 如果源基站根据其下某 个 UE的测量上报决定将其切换到 De B或 RN小区, 并依据测量上报选择了目标小 区和潜在重建小区, 那么无论目标小区和潜在重建小区分别属于 DeNB还是 RN, 从 源基站的角度看, 这些小区都是属于 DeNB的, 因为 RN和 DeNB的 e B身份标识 (evolved NodeB Identifier, 简称 eNB ID) 相同, 所以源基站 "看不见" DeNB下的 腿。 优选地, 将不属于自身的小区的重建必需信息发送给该小区所属的基站包括: 在 基站是 RN并且目标小区是 RN的小区的情况下, RN将不属于自身的小区的重建必需 信息发送给 RN所属的 DeNB; DeNB将不属于自身的小区的重建必需信息发送给该小 区所属的基站。 需要说明的是, 该小区所属的基站可以是该 DeNB下的除上述 RN之外的其它的 腿。
优选地, 在获取切换请求消息中的附加重建信息列表之后, 上述方法还包括: 确 定附加重建信息列表中包含有属于自身的小区; 保留该小区的重建必需信息。 优选地, 在保留该小区的重建必需信息之后, 上述方法还包括: 确定小区切换失 败; 小区所属的基站使用接收到的重建必需信息进行 RRC连接重建。 优选地, 切换请求消息包括以下之一: S1切换请求消息、 X2切换请求消息。 优选地, 小区重建必需信息包括: 小区标识 (cell Identity )、 由源基站和 UE派生 的密钥(Ke B* )、用于在 RRC连接重建立过程中识别鉴定 UE的参数(short MAC-I)。 优选地, 小区重建必需信息还包括以下至少之一: 移动性管理实体 UE S1应用标 识(MME UE S1AP ID)、安全(Security)方面信息、无线接入承载建立列表(E-RABs To Be Setup List )、 UE无线接入能力信息(ue-Radio Access Capability Info)、 接入层配 置 (as-Config)、 切换限制列表 (Handover Restriction List )。 需要说明的是, 本优选实施例中的小区重建必需信息属于 UE 上下文信息 (UE Context Information )。 优选地, 目标基站包括以下之一: De B、 RN。 优选地, 源基站包括以下之一: 普通 e B、 De B、 RN。 下面将结合实例对本发明实施例的实现过程进行详细描述。 优选实施例一 在部署有 RN的网络中执行切换时, 源基站 (指普通 e B或 RN) 由 UE的测量 上报选择一个目标小区、一个或多个潜在重建小区。因为 RN与 DeNB的 eNB ID相同, 无论目标小区实际是 DeNB小区还是 RN小区, 在源基站看来, 选择的这些小区都是 属于目标 DeNB 的。 源基站将这些小区的信息包含在切换请求消息中发送给目标 De B。在目标小区就是 DeNB小区时, DeNB接收切换请求消息并从中获知附加重建 信息列表, 若其中存在 RN小区 (目标 DeNB下的 RN), DeNB就将与这些 RN小区 相关的重建必需信息转发给小区各自对应的 RN (如果附加重建信息列表中有属于 DeNB自身的小区, DeNB会保留这些信息)。 优选地, 在目标小区就是 DeNB小区时, DeNB接收切换请求消息并从中获知附 加重建信息列表, 若其中存在 RN小区 (目标 DeNB下的 RN) 的情况下, DeNB还可
以直接将附加重建信息列表转发给小区各自对应的 RN,从而避免对 RN小区相关的重 建必需信息的筛选, 提高转发效率。 若 UE向目标小区切换失败, 则 UE重新选择小区并对选择到的小区发起重建。 如果 UE选择对如上所述的潜在重建小区发起了重建, 则因基站已有 UE对这一小区 的重建必需信息, 则重建可能是成功的 (否则必然失败)。 图 3是根据本发明优选实施例一的小区切换的处理方法的交互流程图, 如图 3所 示, 包括如下的步骤 301至步骤 303。 步骤 301, 当源基站发起 X2 切换时, 源基站向目标 DeNB 发送切换请求消息 (HANDOVER REQUEST), 消息中包括目标小区和附加重建信息列表。 其中, 目标 小区是 DeNB小区, 附加重建信息列表中包含该 DeNB下的 RN的小区, 但源基站无 法在两种小区间作出区分, 认为都是 DeNB小区。 需要说明的是, 如果本步骤中是 S1 切换, 则源基站向 MME发送切换请求消息 (HANDOVER REQUIRED), MME再向目标 DeNB发送切换请求消息(HANDOVER REQUEST ) o 步骤 302, 目标 DeNB接收到切换请求消息, 可从中获知目标小区和附加重建信 息列表。 如果列表中有属于该 DeNB下的 RN的小区 (当源基站是该 DeNB下的一个 RN时, X2切换请求消息中的附加重建信息列表内可能有的是该 DeNB下其他 RN建 立的小区),则 DeNB将如上所述的重建必需信息转发(与回复切换请求确认消息没有 严格的时序限制) 至这些小区对应的 RN (可能分别对应该 DeNB下的多个 RN)。 如 果附加重建信息列表中有属于 DeNB自身的小区, DeNB会保留这些信息。 步骤 303, 若 UE向目标小区切换失败, 则 UE重新选择小区并对选择到的小区发 起重建。如果 UE选择对如上所述的 RN小区发起了重建, 则因该 RN已有 UE对这一 小区的重建必需信息, 则重建可能是成功的 (否则必然失败)。 优选实施例二 在部署有 RN的网络中执行切换时, 源基站 (指普通 e B或 RN) 由 UE的测量 上报选择一个目标小区、一个或多个潜在重建小区。因为 RN与 DeNB的 eNB ID相同, 无论目标小区实际是 DeNB小区还是 RN小区, 在源基站看来, 选择的这些小区都是 属于目标 DeNB 的。 源基站将这些小区的信息包含在切换请求消息中发送给目标 De B。在目标小区就是 DeNB小区时, DeNB接收切换请求消息并从中获知附加重建
信息列表, 若其中存在 RN小区 (目标 DeNB下的 RN), DeNB就将与这些 RN小区 相关的重建必需信息转发给小区各自对应的 RN (如果附加重建信息列表中有属于 DeNB自身的小区, DeNB会保留这些信息)。 若 UE向目标小区切换失败, 则 UE重新选择小区并对选择到的小区发起重建。 如果 UE选择对如上所述的潜在重建小区发起了重建, 则因基站已有 UE对这一小区 的重建必需信息, 则重建可能是成功的 (否则必然失败)。 图 4是根据本发明优选实施例二的小区切换的处理方法的交互流程图, 如图 4所 示, 包括如下的步骤 401至步骤 403。 步骤 401, 当源基站发起 X2 切换时, 源基站向目标 DeNB 发送切换请求消息 (HANDOVER REQUEST )。 需要说明的是, 如果本步骤中是 S1 切换, 则源基站向 MME发送切换请求消息 (HANDOVER REQUIRED), MME再向目标 DeNB发送切换请求消息(HANDOVER
REQUEST ) o 步骤 402, 目标 DeNB接收到切换请求消息, 可从中获知目标小区和附加重建信 息列表。 如果列表中有属于该 DeNB下的 RN的小区 (当源基站是该 DeNB下的一个 RN时, X2切换请求消息中的附加重建信息列表内可能有的是该 DeNB下其他 RN建 立的小区),则 DeNB将如上所述的重建必需信息转发(与回复切换请求确认消息没有 严格的时序限制) 至这些小区对应的 RN (可能分别对应该 DeNB下的多个 RN)。 如 果附加重建信息列表中有属于 DeNB自身的小区, DeNB会保留这些信息。 步骤 403, 若 UE向目标小区切换失败, 则 UE重新选择小区并对选择到的小区发 起重建。如果 UE选择对如上所述的 RN小区发起了重建, 则因该 RN已有 UE对这一 小区的重建必需信息, 则重建可能是成功的 (否则必然失败)。 优选实施例三 在部署有 RN的网络中执行切换时, 源基站 (指普通 e B或 RN) 由 UE的测量 上报选择一个目标小区、一个或多个潜在重建小区。因为 RN与 DeNB的 eNB ID相同, 无论目标小区实际是 DeNB小区还是 RN小区, 在源基站看来, 选择的这些小区都是 属于 DeNB的。 也就是说, 即使目标小区是 RN小区, 源基站只会认为小区是 DeNB 的, 即仍将这些小区的信息包含在切换请求消息中发送给目标 De B。
在这种情况下, DeNB 接收到切换请求消息后可从中获取目标小区和附加重建信 息列表, 并根据这些小区的信息, 将切换请求消息和重建必需信息分别转发给小区对 应的 RN (如果附加重建信息列表中有属于 DeNB自身的小区, DeNB会保留这些信息)。 因当前的目标小区是 RN小区, DeNB也可在接收到切换请求消息后, 根据目标 小区 ID直接将消息转发给其对应的 RN。 RN在接收到切换请求消息后, 从中获取附 加重建信息列表, 如果其中有不属于自身的小区, RN 就将这些小区的重建必需信息 回传给 DeNB,再由 DeNB根据这些小区信息将重建必需信息保留或转发给对应的 RN。 若 UE向目标小区切换失败, 则 UE重新选择小区并对选择到的小区发起重建。 如果 UE选择对如上所述的潜在重建小区发起了重建, 则因基站已有 UE对这一小区 的重建必需信息, 则重建可能是成功的 (否则必然失败)。 图 5是根据本发明优选实施例三的小区切换的处理方法的交互流程图, 如图 5所 示, 包括如下的步骤 501至步骤 503。 步骤 501, 当源基站发起 X2切换 (也可能是 S1切换) 时, 源基站 (普通 eNB或 RN) 向 DeNB发送切换请求消息(HANDOVER REQUEST), 消息中包括目标小区和 附加重建信息列表。 其中, 目标小区是 RN小区, 附加重建信息列表中可能包含目标 RN所属的 DeNB的小区和该 DeNB下其他 RN的小区, 但源基站无法区分两种小区, 认为都是 DeNB小区。 步骤 502, 当目标小区是 RN小区时, DeNB接收到切换请求消息后, 虽然获知目 标小区是一个 RN的小区, 但仍从消息中获取附加重建信息列表。 如果列表中有属于 除目标 RN外其他 RN建立的小区, DeNB就将重建必需信息转发(与回复切换请求确 认消息没有严格的时序 限制)至这些小区对应的 RN (可能分别对应该 DeNB下的多个 RN, 如果附加重 建信息列表中有属于 DeNB 自身的小区, DeNB会保留这些信息)。 DeNB向目标 RN 发送的切换请求消息中的附加重建信息列表内不会含有不属于目标 RN的小区。 步骤 503, 若 UE向目标小区的切换失败, 则 UE重新选择小区并对选择到的小区 发起重建。 如果 UE选择对如上所述的潜在重建小区发起了重建, 则因基站已有 UE 对这一小区的重建必需信息, 则重建可能是成功的 (否则必然失败)。 优选实施例四
在部署有 RN的网络中执行切换时, 源基站 (指普通 e B或 RN) 由 UE的测量 上报选择一个目标小区、一个或多个潜在重建小区。因为 RN与 DeNB的 eNB ID相同, 无论目标小区实际是 DeNB小区还是 RN小区, 在源基站看来, 选择的这些小区都是 属于 DeNB的。 也就是说, 即使目标小区是 RN小区, 源基站只会认为小区是 DeNB 的, 即仍将这些小区的信息包含在切换请求消息中发送给目标 De B。 在这种情况下, DeNB 接收到切换请求消息后可从中获取目标小区和附加重建信 息列表, 并根据这些小区的信息, 将切换请求消息和重建必需信息分别转发给小区对 应的 RN (如果附加重建信息列表中有属于 DeNB自身的小区, DeNB会保留这些信息)。 因当前的目标小区是 RN小区, DeNB也可在接收到切换请求消息后, 根据目标 小区 ID直接将消息转发给其对应的 RN。 RN在接收到切换请求消息后, 从中获取附 加重建信息列表, 如果其中有不属于自身的小区, RN 就将这些小区的重建必需信息 回传给 DeNB,再由 DeNB根据这些小区信息将重建必需信息保留或转发给对应的 RN。 若 UE向目标小区切换失败, 则 UE重新选择小区并对选择到的小区发起重建。 如果 UE选择对如上所述的潜在重建小区发起了重建, 则因基站已有 UE对这一小区 的重建必需信息, 则重建可能是成功的 (否则必然失败)。 图 6是根据本发明优选实施例四的小区切换的处理方法的交互流程图, 如图 5所 示, 包括如下的步骤 601至步骤 603。 步骤 601, 当源基站发起 X2切换 (也可能是 S1切换) 时, 源基站向 MME发送 切换请求消息 (HANDOVER REQUIRED), MME再向目标 DeNB发送切换请求消息 (HANDOVER REQUEST )„ 切换过程中源基站与目标 DeNB间的消息传送都会经由 MME (如所示的切换请求确认消息), 但这并不影响发明点内容。 需要注意的是, 如 果源基站是 RN, 根据 Relay架构, 它会将所属的 DeNB看做 MME, 即 DeNB为其代 理 MME的功能, 也就是说, MME实际是源 RN所属的 DeNB, 而这个 DeNB与目标 DeNB间应真正的 MME, 切换消息的传送也都要经过它。 步骤 602, 当目标小区是 RN小区时, DeNB根据切换请求消息中目标小区 ID将 消息转发至目标 RN。 目标 RN从消息中获知附加重建信息列表,如果其中有不属于自 己的小区, RN就将这些小区对应的重建必需信息回传给 DeNB (与回复切换请求确认 消息没有严格的时序限制, 甚至可能携带在切换请求确认消息中)。 DeNB接收到这些 信息后, 对属于自己的小区信息保留, 对属于其他 RN的小区重建必需信息转发给这 些小区对应的 RN。
步骤 603, 若 UE向目标小区的切换失败, 则 UE重新选择小区并对选择到的小区 发起重建。 如果 UE选择对如上所述的潜在重建小区发起了重建, 则因基站已有 UE 对这一小区的重建必需信息, 则重建可能是成功的 (否则必然失败)。 需要说明的是, 在附图的流程图示出的步骤可以在诸如一组计算机可执行指令的 计算机系统中执行, 并且, 虽然在流程图中示出了逻辑顺序, 但是在某些情况下, 可 以以不同于此处的顺序执行所示出或描述的步骤。 本发明实施例提供了一种小区切换的处理装置, 该小区切换的处理装置可以应用 于基站, 该小区切换的处理装置可以用于实现上述小区切换的处理方法。 图 7是根据 本发明实施例的小区切换的处理装置的结构框图, 如图 7所示, 包括接收模块 72, 获 取模块 74, 第一确定模块 76和发送模块 78。 下面对其结构进行详细描述。 接收模块 72, 设置为接收切换请求消息; 获取模块 74, 连接至接收模块 72, 设 置为获取接收模块 72接收的切换请求消息中的附加重建信息列表; 第一确定模块 76, 连接至获取模块 74, 设置为确定获取模块 74获取的附加重建信息列表中包含有不属 于自身的小区; 发送模块 78, 连接至第一确定模块 76, 设置为在第一确定模块 76确 定获取模块 74获取的附加重建信息列表中包含有不属于自身的小区之后,将不属于自 身的小区重建必需信息发送给该小区所属的基站。 优选地, 发送模块 78包括: 发送子模块 782, 在目标小区是中继节点 RN的小区 的情况下, 设置为将不属于自身的小区的重建必需信息发送给 RN所属的宿主基站 De B。 优选地, 上述小区切换的处理装置还包括第二确定模块 710和保留模块 712。 下 面对其结构进行详细描述。 第二确定模块 710, 设置为确定附加重建信息列表中包含有属于自身的小区; 保 留模块 712, 设置为保留属于自身的小区的重建必需信息。 需要说明的是, 装置实施例中描述的小区切换的处理装置对应于上述的方法实施 例, 其具体的实现过程在方法实施例中已经进行过详细说明, 在此不再赘述。 综上所述, 根据本发明的上述实施例, 提供了一种小区切换的处理方法及装置。 本发明通过目标基站对小区进行区分, 然后将不属于该目标基站的小区的小区重建必 需信息发送到该小区所属的基站, 从而可以提高部署有 RN的网络中的重建成功率, 并保证其良好的移动性能。
显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可以用通用 的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布在多个计算装置所 组成的网络上, 可选地, 它们可以用计算装置可执行的程序代码来实现, 从而, 可以 将它们存储在存储装置中由计算装置来执行, 或者将它们分别制作成各个集成电路模 块, 或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。 这样, 本发明 不限制于任何特定的硬件和软件结合。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本领域的技 术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内, 所作的 任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。
Claims
1. 一种小区切换的处理方法, 包括:
基站接收到切换请求消息;
获取所述切换请求消息中的附加重建信息列表;
确定所述附加重建信息列表中包含有不属于自身的小区;
将所述不属于自身的小区的重建必需信息发送给该小区所属的基站。
2. 根据权利要求 1所述的方法, 其中, 将所述不属于自身的小区的重建必需信息 发送给该小区所属的基站包括:
在所述基站是中继节点 RN并且目标小区是所述 RN的小区的情况下, 所 述 RN将所述不属于自身的小区的重建必需信息发送给所述 RN所属的宿主基 站 De B;
所述 De B将所述不属于自身的小区的重建必需信息发送给该小区所属的 基站。
3. 根据权利要求 1所述的方法, 其中, 在获取所述切换请求消息中的附加重建信 息列表之后, 所述方法还包括:
确定所述附加重建信息列表中包含有属于自身的小区;
保留该小区的重建必需信息。
4. 根据权利要求 3所述的方法, 其中, 在保留该小区的重建必需信息之后, 所述 方法还包括:
确定小区切换失败;
所述小区所属的基站使用接收到的重建必需信息进行 RRC连接重建。
5. 根据权利要求 1至 4中任一项所述的方法, 其中, 所述切换请求消息包括以下 之一: S1切换请求消息、 X2切换请求消息。
6. 根据权利要求 1至 4中任一项所述的方法, 其中, 所述重建必需信息包括: 小 区标识、 由源基站和 UE派生的密钥、用于在 RRC连接重建立过程中识别鉴定 UE的参数。
7. 根据权利要求 6所述的方法, 其中, 所述重建必需信息还包括以下至少之一: 移动性管理实体 UE S1应用标识、安全方面信息、无线接入承载建立列表、 UE 无线接入能力信息、 接入层配置、 切换限制列表。
8. 根据权利要求 1 至 4 中任一项所述的方法, 其中, 所述基站包括以下之一: De B、 腿。
9. 一种小区切换的处理装置, 包括:
接收模块, 设置为接收切换请求消息;
获取模块, 设置为获取所述切换请求消息中的附加重建信息列表; 第一确定模块, 设置为确定所述附加重建信息列表中包含有不属于自身的 小区;
发送模块, 设置为将所述不属于自身的小区的重建必需信息发送给该小区 所属的基站。
10. 根据权利要求 9所述的装置, 其中, 所述发送模块包括:
发送子模块, 在目标小区是中继节点 RN的小区的情况下, 设置为将所述 不属于自身的小区的重建必需信息发送给所述 RN所属的宿主基站 De B。
11. 根据权利要求 9所述的装置, 其中, 还包括: 第二确定模块, 设置为确定所述附加重建信息列表中包含有属于自身的小 区;
保留模块, 设置为保留所述属于自身的小区的重建必需信息。
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WO2011019973A2 (en) * | 2009-08-12 | 2011-02-17 | Qualcomm Incorporated | Method and apparatus for relay backhaul design in a wireless communication system |
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