WO2012142883A1 - 无线中继节点切换的处理方法及系统 - Google Patents

无线中继节点切换的处理方法及系统 Download PDF

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Publication number
WO2012142883A1
WO2012142883A1 PCT/CN2012/072151 CN2012072151W WO2012142883A1 WO 2012142883 A1 WO2012142883 A1 WO 2012142883A1 CN 2012072151 W CN2012072151 W CN 2012072151W WO 2012142883 A1 WO2012142883 A1 WO 2012142883A1
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WIPO (PCT)
Prior art keywords
user equipment
relay node
wireless relay
base station
host base
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PCT/CN2012/072151
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English (en)
French (fr)
Inventor
陈思
奚进
陈琳
翟恒星
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中兴通讯股份有限公司
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Publication of WO2012142883A1 publication Critical patent/WO2012142883A1/zh

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Classifications

    • 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
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/005—Moving wireless networks
    • 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 system for processing a wireless relay node handover.
  • 3GPP 3rd Generation Partnership Project
  • LTE Long-Term Evolution
  • OFDM Orthogonal Frequency Division Multiplexing
  • FDMA Frequency Division Multiple Access
  • the main performance objectives of the 3GPP LTE project include: It can provide downlink 100Mbps and uplink 50Mbps peak rate in 20MHz spectrum bandwidth; Improve cell edge user performance; Improve cell capacity; Reduce system delay, user plane internal one-way transmission delay is less than 5ms
  • the control plane migrates from sleep state to active state for less than 50ms, and the migration time from the resident state to the active state is less than 100ms; cell coverage supporting lOOKm radius; capable of providing access services greater than 100kbps for 350Km/h high-speed mobile users Supports paired or unpaired spectrum and flexible configuration of multiple bandwidths from 1.25 MHz to 20 MHz.
  • LTE-A is an abbreviation of LTE-Advanced and is a 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 and other peaks have slightly exceeded the 4G requirements, and other technical indicators have met the requirements of the 4G standard.
  • the overall design of LTE-A which brings LTE to 4G, far exceeds the minimum demand of 4G.
  • 3GPP completed the LTE-A technical requirements report and proposed the minimum requirements for LTE-A: downlink peak rate of 1 Gbps, uplink peak rate of 500 Mbps, and uplink and downlink peak spectrum utilization of 15 Mbps/Hz and 30 Mbps/ respectively. Hz.
  • LTE-A International Telecommunications Union-Telecommunications Standardization Sector
  • Key technologies of LTE-A include carrier aggregation, multi-point cooperation, relay transmission, multi-antenna enhancement, wireless relay, and self-organizing networks.
  • wireless relay technology is applied to temporary wireless coverage requirements. For example, due to terrain or environment, it is impossible to assume the area where the wired backbone network of the ordinary base station is connected, or the area or hot spot that covers the dead corner. Base station equipment with line connections solves this coverage requirement at a high cost, and therefore introduces a wireless relay technology to solve.
  • 1 is a schematic diagram of a wireless relay node architecture according to the related art. As shown in FIG.
  • a wireless relay node (Relay Node, hereinafter referred to as RN) is connected to a base station of an existing network by using a wireless signal, and is covered by itself.
  • the user equipment (User Equipment, referred to as UE) provides services to achieve coverage expansion, reduce coverage dead angles, and transfer hotspot load.
  • a base station that is wirelessly connected to the RN is called a donor base station (Donor eNodeB, abbreviated as De B), and a radio link between De B and the RN is called a backhaul link, and an air interface between the DeNB and the RN ( Referred to as the air interface) is called the Un interface.
  • the radio link between the RN and the UE is called an Access Link, and the air interface between the RN and the UE is called a Uu interface.
  • the RN acts as an e B; and for the DeNB connected to the RN, the RN acts as a UE.
  • the downlink data first arrives at the DeNB, and the DeNB transmits the downlink data to the RN, and then the RN transmits the downlink data to the UE, and the uplink data transmission is reversed.
  • the relay node can also be applied to high-speed mobile scenes, for example, applied to in-vehicle devices to provide stable wireless coverage for wireless communication devices in the vehicle. In this scenario, as the vehicle moves, the relay node switches between different host base stations.
  • the handover process may be classified into a core network handover (for example, S1 handover) or a direct handover (for example, X2 handover) according to the ground-side signaling routing manner.
  • 2 is a flow chart of a core network handover according to the related art. As shown in FIG. 2, the core network handover procedure may be simply summarized as follows: The source base station determines, according to the measurement report of the UE, that a UE needs to initiate a handover, and communicates with the core network. The interface (for example, S1) sends a handover request command to the core network, where the command carries the context information of the UE.
  • the interface for example, S1 sends a handover request command to the core network, where the command carries the context information of the UE.
  • the core network After receiving the core network, the core network determines the location of the target base station by using 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 determines that the UE can access the UE, it sends a handover request acknowledgement message to the core network, and the core network forwards the packet to the source base station to start the handover process of the UE in the air interface.
  • 3 is a flow chart of direct interface switching according to the related art. As shown in FIG.
  • the direct handover procedure may be simply summarized as follows:
  • the source base station determines, according to the measurement report of the UE, that a UE needs to initiate a handover, and uses a direct interface between the base stations ( For example, X2) sends a handover request command to the target base station, where the command carries the context information of the UE.
  • the target base station reads the information therein and performs admission control on the UE. After determining that the UE can be accessed, the response message is sent to the source base station, and the source base station starts the handover process of the UE in the air interface.
  • the context information includes: a Cell Radio Network Temporary Identifier (referred to as a Cell Radio Network Temporary Identifier)
  • a Cell Radio Network Temporary Identifier For the C-RNTI, the measurement configuration of the UE, the Signaling Radio Bearer (SRB) configuration, the Data Radio Bearer (DRB) configuration, and the UE capability.
  • SRB Signaling Radio Bearer
  • DRB Data Radio Bearer
  • the target base station needs to determine whether to allow the UE to access according to the above information, as well as its own configuration and radio resource status. This process is also called Admission Control. In a scenario such as a vehicle, the relay node moves simultaneously with the terminal it administers.
  • the present invention provides a method and system for processing a wireless relay node handover to at least solve the problem in the related art that the target host base station performs admission control based only on the context of the wireless relay node.
  • a processing method of wireless relay node switching is provided.
  • the method for processing a wireless relay node handover includes: the source host base station determines to switch the wireless relay node to the target host base station; and the source host base station transmits the context information of the user equipment under the jurisdiction of the wireless relay node to the target host base station.
  • the context information of the user equipment managed by the wireless relay node is obtained by the source host base station from the wireless relay node in advance.
  • the method further includes: the target host base station receiving the context information of the user equipment managed by the wireless relay node; the target host base station According to the context information, admission control is performed on the user equipment under the jurisdiction of the wireless relay node.
  • the target host base station performs admission control on the user equipment of the wireless relay node according to the context information, including one of the following: For the user equipment with successful admission control, the target host base station maps the radio bearer of the user equipment to the wireless relay node. On the radio bearer, and/or the target host base station carries the list of the user equipment through the X2 handover request acknowledgement message or the S1 handover request acknowledgement message; for the user equipment that fails the admission control, the target donor base station notifies the wireless relay of the information of the user equipment The node, or the release of the user equipment is initiated by a process with the core network.
  • the source host base station sends the context information of the user equipment managed by the wireless relay node to the target host base station through the X2 handover request message or the S1 handover request message.
  • the source host base station acquires context information of the user equipment managed by the wireless relay node from the wireless relay node in advance by using one of the following methods: acquiring the context information of the user equipment managed by the wireless relay node by using the wireless resource establishment procedure;
  • the X2 handover process acquires the context information of the user equipment managed by the wireless relay node; acquires the context information of the user equipment managed by the wireless relay node through the S1 handover procedure; and obtains the wireless information by analyzing the signaling of the wireless relay node interacting with the core network Context information of the user equipment governed by the relay node.
  • the context information of the user equipment includes at least one of the following: a cell radio network temporary identifier of the user equipment, a measurement configuration of the user equipment, a signaling radio bearer configuration of the user equipment, a data radio bearer configuration of the user equipment, a capability information of the user equipment, and a user.
  • the mobility management entity of the device's current service is provided.
  • the processing system for wireless relay node handover includes a source host base station, a wireless relay node, and a target host base station, wherein the source host base station includes: a determining module configured to determine to switch the wireless relay node to the target host base station; The module is configured to send the context information of the user equipment of the wireless relay node to the target host base station, where the context information of the user equipment managed by the wireless relay node is obtained by the source host base station from the wireless relay node in advance.
  • the target host base station includes: a receiving module, configured to receive context information of a user equipment managed by the wireless relay node; and 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.
  • the admission control module includes: a mapping submodule, configured to map the radio bearer of the user equipment to the radio bearer of the radio relay node for the user equipment with successful admission control; and the carrying submodule, configured as a user equipment for successful admission control
  • the X2 handover request acknowledgement message or the S1 handover request acknowledgement message carries the list of the user equipment; the notification submodule is configured to notify the wireless relay node of the information of the user equipment for the user equipment that fails the admission control; It is set to initiate the release of the user equipment by the process with the core network for the user equipment that fails the admission control.
  • the sending module sends the context information of the user equipment under the jurisdiction of the wireless relay node to the target host base station through the X2 handover request message or the S1 handover request message; the source host base station acquires the wireless in advance from the wireless relay node by using one of the following methods: Context information of the user equipment managed by the node: obtaining the context information of the user equipment managed by the wireless relay node by using the radio resource establishment process; acquiring the context information of the user equipment managed by the wireless relay node by using the X2 handover procedure; The handover process acquires the context information of the user equipment under the jurisdiction of the wireless relay node; and obtains the context information of the user equipment governed by the wireless relay node by analyzing the signaling of the wireless relay node interacting with the core network.
  • FIG. 1 is a schematic diagram of a wireless relay node architecture according to the related art
  • FIG. 2 is a flow chart of a core network handover according to the related art
  • FIG. 3 is a flowchart of direct interface switching according to the related art
  • 4 is a flowchart of a method for processing a 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 flowchart of wireless relay node handover according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a method for processing a wireless relay node handover according to an embodiment of the present invention.
  • the method includes the following steps S402 to S404.
  • Step S402 the source host base station determines to switch the wireless relay node to the target host base station.
  • Step S404 The source host base station sends the context information of the user equipment managed by the wireless relay node to the target host base station, where the context information of the user equipment managed by the wireless relay node is obtained by the source host base station from the wireless relay node in advance.
  • the target host base station performs admission control only according to the context of the wireless relay node.
  • the source host base station sends the context information of the user equipment managed by the wireless relay node to the target 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 admission control result.
  • the accuracy Preferably, after the source host base station sends the context information of the user equipment of the wireless relay node to the target host base station, the method further includes: the target host base station receiving the user equipment under the jurisdiction of the wireless relay node Context information; the target host base station performs admission control on the user equipment under the jurisdiction of the wireless relay node according to the context information.
  • the target host base station performs admission control on the user equipment of the wireless relay node according to the context information, including one of the following: For the user equipment with successful admission control, the target host base station maps the radio bearer of the user equipment to the wireless device. And the target host base station carries the list of the user equipment by using the X2 handover request acknowledgement message or the S1 handover request acknowledgement message; for the user equipment that fails the admission control, the target host base station notifies the information of the user equipment The wireless relay node initiates the release of the user equipment by a process with the core network.
  • the source host base station sends the context information of the user equipment managed by the wireless relay node to the target host base station by using an X2 handover request message or an S1 handover request message.
  • the source host base station acquires context information of the user equipment under the control of the wireless relay node from the wireless relay node in advance by using one of the following methods: acquiring the context of the user equipment managed by the wireless relay node by using the wireless resource establishment procedure Obtaining context information of the user equipment managed by the wireless relay node through the X2 switching process; obtaining context information of the user equipment managed by the wireless relay node through the S1 handover procedure; and analyzing the interaction between the wireless relay node and the core network by analyzing the information Let the context information of the user equipment under the jurisdiction of the wireless relay node be obtained.
  • the context information of the user equipment includes at least one of the following: a Cell Radio Network Temporary Identifier (C-RNTI) of the user equipment, a measurement configuration of the user equipment, and a signaling radio bearer of the user equipment ( Signaling Radio Bearer (SRB) configuration, data radio bearer (DRB) configuration of the user equipment, capability information of the user equipment, and mobility management entity of the current service of the user equipment (Mobile Management Entity, referred to as MME).
  • C-RNTI Cell Radio Network Temporary Identifier
  • SRB Signaling Radio Bearer
  • DRB data radio bearer
  • MME mobility management entity of the current service of the user equipment
  • FIG. 5 is a flow chart according to a preferred embodiment of the present invention. As shown in FIG. 5, the following steps S502 to S512 are included. Step S502, the RN detects the Source De B according to the configuration of the OAM and the surrounding wireless signals. The RN initiates an RRC connection setup request to the Source DeNB and indicates to the Source DeNB that it is a wireless relay node.
  • Source DeNB selects MME for RN and establishes radio access bearer (E-UTRAN Radio Access) Bearer, referred to as E-RAB), in this process, the MME performs device authentication on the RN.
  • E-RAB radio access bearer
  • the Source DeNB allocates dedicated radio resources and data radio bearers to the RNs on the air interface.
  • the RN establishes a connection with the OAM to obtain and update parameters, and establishes an S1 and X2 interface with the RN on the bearer.
  • the RN starts to establish its own cell and performs system broadcast on the air interface.
  • Step S504 the group UE detects from the air interface and camps in the cell established by the RN.
  • the UE After the UE enters the connected state, the UE establishes an RRC connection with the RN, and the RN allocates dedicated resources such as C-RNTI, configuration measurement, SRB, and DRB to the UE.
  • the RN in the identity of e B, requests the establishment of an E-RAB for this UE through SI Initial UE Message signaling.
  • the signaling is forwarded by the DeNB to the corresponding MME.
  • the MME establishes an E-RAB for the UE through the SI Initial Context Setup signaling, and carries the capability information of the UE.
  • the RN stores the context information of the connected UE obtained in the foregoing process (including the Cell Radio Network Temporary Identifier (C-RNTI) of the UE, the measurement configuration of the UE, and the Signaling Radio Bearer (Signing Radio Bearer).
  • C-RNTI Cell Radio Network Temporary Identifier
  • SRB Signaling Radio Bearer
  • DRB Data Radio Bearer
  • Step S506 the RN notifies the Source DeNB of the context information of the UE by using control plane signaling (eg RRC flow, SI flow or X2 flow) with the Source DeNB.
  • Step S508 as the RN moves, the Source DeNB determines, by using the measurement report, that the RN is approaching the target donor base station Target DeNB.
  • the Source DeNB selects to initiate a direct interface handover X2 Handover or a ground-side handover SI Handover to the Target DeNB, and correspondingly sends an X2 Handover Request or SI Handover Request message.
  • the message indicates that the RN is a wireless relay node, and carries the context of the RN, and also carries the context information of the UE under the RN obtained in step 103.
  • the target DeNB carries the result of the admission control, that is, the list of the UEs that can be admitted by using the S1/X2 Handover Request Acknowledge message.
  • the optional Target DeNB may also initiate the UE to the MME according to the information of the Serving MME of the UE saved in the context. Context release; or the Target DeNB notifies the RN through the control plane message (eg RRC flow, SI flow or X2 flow) between the RN and the RN, and performs further release processing by the RN.
  • the Target DeNB needs to determine the correspondence between the E-RAB of the UE and the E-RAB it establishes for the RN according to the configuration.
  • Step S512 the Source DeNB instructs the RN to switch to Target De B through an RRC RRCConnectionReconfiguration message.
  • the signaling carries the necessary air interface configuration that the RN accesses to the Target DeNB.
  • RN Synchronize with Target De B according to the new wireless configuration and send an RRC RRCConnectionReconfigurationComplete message to Target De B.
  • a device such as an L1 Repeater may also carry a group of UEs to perform handover. In the group Mobility scenario, the present invention is used.
  • the method can also implement that the target host base station can also perform admission control according to the context of the user equipment, thereby ensuring the accuracy of the admission control result.
  • 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 invention provides a processing system for wireless relay node switching, and the processing system for the wireless relay node switching can be used to implement the processing method of the wireless relay node switching.
  • 6 is a structural block diagram of a processing system for wireless relay node handover according to an embodiment of the present invention. As shown in FIG.
  • the source host base station 62, the wireless relay node 64, and the target host base station 66 are included, wherein the source host base station 62 A determination module 622 and a transmission module 624 are included.
  • the structure is described in detail below.
  • the determining module 622 is configured to determine to switch the wireless relay node 64 to the target host base station 66; the sending module
  • the connection to the determining module 622 is configured to send the context information of the user equipment managed by the wireless relay node 64 to the target host base station 66 determined by the determining module 622, where the context information of the user equipment under the jurisdiction of the wireless relay node 64
  • the source host base station is previously acquired from the wireless relay node.
  • the target host base station 66 includes a receiving module 662 and an admission control module 664, the structure of which is described in detail below.
  • the receiving module 662 is configured to receive context information of the user equipment under the jurisdiction of the wireless relay node 62.
  • the admission control module 664 is coupled to the receiving module 662, and configured to be used by the wireless relay node 62 according to the context information received by the receiving module 662.
  • the admission control module 664 includes a mapping sub-module 6642, a carrying sub-module 6644, a notification sub-module 6646, and an initiating sub-module 6648, the structure of which is described in detail below.
  • the mapping sub-module 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 with successful admission control.
  • the carrier sub-module 6644 is configured to pass the user equipment with successful admission control.
  • the X2 handover request acknowledgement message or the S1 handover request acknowledgement message carries a list of the user equipment; the notification sub-module 6646 is set to be a user equipment for the admission control failure.
  • the wireless relay node 64 is notified; the initiating sub-module 6648 is configured to initiate the release of the user equipment by the process with the core network for the user equipment that fails the admission control.
  • the sending module 624 sends the context information of the user equipment under the jurisdiction of the wireless relay node 64 to the target host base station 66 through the X2 handover request message or the S1 handover request message; the source host base station 62 advances from the method including one of the following:
  • the wireless relay node 64 acquires the context information of the user equipment managed by the wireless relay node 64: acquires the context information of the user equipment managed by the wireless relay node 64 through the wireless resource establishment procedure; acquires the wireless relay node 64 through the X2 handover procedure.
  • the context information of the user equipment under the jurisdiction; the context information of the user equipment managed by the wireless relay node 64 is obtained through the S1 handover procedure; and the wireless relay node 64 is obtained by analyzing the signaling of the wireless relay node 64 interacting with the core network. Context information for the user device.
  • the processing system of the wireless relay node switching 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 processing method and system for wireless relay node switching are provided.
  • the present invention transmits the context information of the user equipment managed by the wireless relay node to the target host base station by 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 the admission control result.
  • 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.
  • they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module.

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Abstract

本发明公开了一种无线中继节点切换的处理方法及系统，该方法包括：源宿主基站确定将无线中继节点切换到目标宿主基站；源宿主基站将无线中继节点所辖的用户设备的上下文信息发送给目标宿主基站，其中无线中继节点所辖的用户设备的上下文信息是源宿主基站预先从无线中继节点获取的。本发明通过源宿主基站将无线中继节点所辖的用户设备的上下文信息发送给目标宿主基站，从而使得目标宿主基站还可以根据用户设备的上下文进行接纳控制，进而保证接纳控制结果的准确性。

Description

无线中继节点切换的处理方法及系统 技术领域 本发明涉及通信领域， 具体而言，涉及一种无线中继节点切换的处理方法及系统。 背景技术 第三代合作伙伴计划（3rd Generation Partnership Project, 简称为 3GPP)长期演进
(Long-Term Evolution,简称为 LTE)项目是近两年来 3GPP启动的最大的新技术研发 项目， 这种以正交频分复用 （Orthogonal Frequency Division Multiplexing, 简称为 OFDM) /频分多址 （Frequency Division Multiple Access, 简称为 FDMA) 为核心的技 术可以被看作"准 4G"技术。 3GPP LTE项目的主要性能目标包括： 在 20MHz频谱带宽 能够提供下行 100Mbps、 上行 50Mbps的峰值速率； 改善小区边缘用户的性能； 提高 小区容量； 降低系统延迟， 用户平面内部单向传输时延低于 5ms， 控制平面从睡眠状 态到激活状态迁移时间低于 50ms， 从驻留状态到激活状态的迁移时间小于 100ms; 支 持 lOOKm半径的小区覆盖； 能够为 350Km/h高速移动用户提供大于 100kbps的接入 服务； 支持成对或非成对频谱， 并可灵活配置 1.25 MHz到 20MHz多种带宽。 LTE-A是 LTE-Advanced的简称， 是 LTE技术的后续演进。 LTE俗称 3.9G, 这说 明 LTE的技术指标已经与 4G非常接近了。 LTE与 4G相比较， 除最大带宽、 上行峰 值速率两个指标略低于 4G要求外， 其他技术指标都已经达到了 4G标准的要求。而将 LTE正式带入 4G的 LTE-A的技术整体设计则远超过了 4G的最小需求。 在 2008年 6 月， 3GPP完成了 LTE-A的技术需求报告， 提出了 LTE-A的最小需求： 下行峰值速率 lGbps, 上行峰值速率 500Mbps， 上下行峰值频谱利用率分别达到 15Mbps/Hz 和 30Mbps/Hz。 这些参数已经远高于国际电信联盟 -电信标准部 （ International Telecommunications Union- Telecommunications standardization sector,简称为 ITU-T )的 最小技术需求指标， 具有明显的优势。 LTE-A的关键技术包括载波聚合， 多点合作， 接力传输， 多天线增强， 无线中继， 自组织网络等。 其中无线中继技术应用于临时性的无线覆盖需求。 如由于地形或者环境等原因无 法假设普通基站的有线骨干网络连接的地区， 或者覆盖死角的地区或热点地区。 架设 有线连接的基站设备解决这种覆盖需求成本较高， 因此引入无线中继技术来解决。 图 1是根据相关技术的无线中继节点架构的示意图， 如图 1所示， 无线中继节点 (Relay Node, 简称为 RN)与现有网络的基站通过无线信号连接， 并为自身覆盖范围 内的用户设备 （User Equipment, 简称为 UE) 提供服务， 从而实现覆盖范围扩展， 减 少覆盖死角， 以及转移热点地区负载等。 与 RN进行无线连接的基站称为宿主基站 (Donor eNodeB,简称为 De B)，De B和 RN之间的无线链路称为回程链路（backhaul link), DeNB和 RN之间的空中接口 （简称空口） 称为 Un接口。 RN和 UE之间的无 线链路称为接入链路 （Access Link), RN和 UE之间的空中接口称为 Uu接口。 对于 RN所服务的 UE， 该 RN充当一个 e B的角色； 而对于与 RN连接的 DeNB， 该 RN 则充当一个 UE的角色。 下行数据先到达 DeNB, DeNB将该下行数据传递给 RN， 然 后由 RN将该下行数据传输至 UE， 上行数据的传输则反之。 中继节点也可以应用于高速移动场景例如应用于车载设备中， 为车内的无线通讯 设备提供稳定的无线覆盖。 在此场景下， 随着车辆的移动性， 中继节点会在不同的宿 主基站之间进行切换。 切换过程根据地面侧信令路由方式可分为经核心网切换 （例如 S1切换） 或直接切换 （例如 X2切换）。 图 2是根据相关技术的经核心网切换的流程图， 如图 2所示， 经核心网切换流程 可以简单概括为： 源基站根据 UE的测量报告判断一个 UE需要发起切换时， 通过与 核心网接口（例如 S1 )向核心网发送切换要求命令， 命令中携带该 UE的上下文信息。 核心网接收后， 通过命令中携带的信息， 判断目标基站所在的位置， 并发送切换请求 给目标基站。 目标基站读取其中 UE的上下文信息， 对 UE进行接纳控制。 目标基站 判断可以接入该 UE后， 向核心网回复切换请求确认消息， 核心网再转发至源基站开 始 UE在空口的切换过程。 图 3是根据相关技术的经直接接口切换的流程图， 如图 3所示， 直接切换流程可 以简单概括为： 源基站根据 UE的测量报告判断一个 UE需要发起切换时， 通过基站 间直接接口 （例如 X2) 向目标基站发送切换要求命令， 命令中携带该 UE的上下文信 息。 目标基站读取其中的信息， 对 UE进行接纳控制。 判断可以接入该 UE后， 向源 基站回复响应消息， 源基站开始 UE在空口的切换过程。 在上述切换过程中， 无论是经核心网切换还是直接切换都会在切换要求命令中携 带 UE在源基站的上下文信息，该上下文信息包括： UE的小区无线网络临时标识（Cell Radio Network Temporary Identifier, 简称为 C-RNTI), UE的测量配置， 信令无线承载 ( Signaling Radio Bearer, 简称为 SRB) 配置， 数据无线承载 （Data Radio Bearer, 简 称为 DRB) 配置， UE能力等信息。 目标基站需要根据上述信息以及自身的配置和无 线资源状况判断是否允许 UE接入， 这个过程也叫接纳控制 （Admission Control )。 而在车载等场景下， 中继节点是与其所辖的终端同时移动的， 此时如果目标宿主 基站仅仅根据中继节点的上下文进行接纳控制， 则接纳控制结果不准确。 发明内容 本发明提供了一种无线中继节点切换的处理方法及系统， 以至少解决相关技术中 目标宿主基站仅仅根据无线中继节点的上下文进行接纳控制的问题。 为了实现上述目的， 根据本发明的实施例， 提供了一种无线中继节点切换的处理 方法。 根据本发明的无线中继节点切换的处理方法包括： 源宿主基站确定将无线中继节 点切换到目标宿主基站； 源宿主基站将无线中继节点所辖的用户设备的上下文信息发 送给目标宿主基站， 其中无线中继节点所辖的用户设备的上下文信息是源宿主基站预 先从无线中继节点获取的。 在源宿主基站将无线中继节点所辖的用户设备的上下文信息发送给目标宿主基站 之后， 上述方法还包括： 目标宿主基站接收到无线中继节点所辖的用户设备的上下文 信息； 目标宿主基站根据上下文信息，对无线中继节点所辖的用户设备进行接纳控制。 目标宿主基站根据上下文信息， 对无线中继节点所辖的用户设备进行接纳控制包 括以下之一： 对于接纳控制成功的用户设备， 目标宿主基站将该用户设备的无线承载 映射到无线中继节点的无线承载上， 和 /或目标宿主基站通过 X2切换请求确认消息或 者 S1切换请求确认消息携带该用户设备的列表；对于接纳控制失败的用户设备， 目标 宿主基站将该用户设备的信息通知无线中继节点， 或者通过与核心网的流程发起该用 户设备的释放。 源宿主基站通过 X2切换请求消息或者 S1切换请求消息将无线中继节点所辖的用 户设备的上下文信息发送给目标宿主基站。 源宿主基站通过包括以下之一的方式预先从无线中继节点获取无线中继节点所辖 的用户设备的上下文信息： 通过无线资源建立流程获取无线中继节点所辖的用户设备 的上下文信息； 通过 X2切换流程获取无线中继节点所辖的用户设备的上下文信息； 通过 S1切换流程获取无线中继节点所辖的用户设备的上下文信息;通过解析无线中继 节点与核心网交互的信令获取无线中继节点所辖的用户设备的上下文信息。 用户设备的上下文信息包括以下至少之一： 用户设备的小区无线网络临时标识、 用户设备的测量配置、用户设备的信令无线承载配置、用户设备的数据无线承载配置、 用户设备的能力信息、 用户设备的当前服务的移动性管理实体。 为了实现上述目的， 根据本发明的另一个方面， 提供了一种无线中继节点切换的 处理系统。 根据本发明的无线中继节点切换的处理系统包括源宿主基站、 无线中继节点和目 标宿主基站， 其中源宿主基站包括： 确定模块， 设置为确定将无线中继节点切换到目 标宿主基站； 发送模块， 设置为将无线中继节点所辖的用户设备的上下文信息发送给 目标宿主基站， 其中无线中继节点所辖的用户设备的上下文信息是源宿主基站预先从 无线中继节点获取的。 目标宿主基站包括： 接收模块， 设置为接收无线中继节点所辖的用户设备的上下 文信息； 接纳控制模块， 设置为根据上下文信息， 对无线中继节点所辖的用户设备进 行接纳控制。 接纳控制模块包括： 映射子模块， 设置为对于接纳控制成功的用户设备， 将该用 户设备的无线承载映射到无线中继节点的无线承载上； 携带子模块， 设置为对于接纳 控制成功的用户设备，通过 X2切换请求确认消息或者 S1切换请求确认消息携带该用 户设备的列表； 通知子模块， 设置为对于接纳控制失败的用户设备， 将该用户设备的 信息通知无线中继节点； 发起子模块， 设置为对于接纳控制失败的用户设备， 通过与 核心网的流程发起该用户设备的释放。 发送模块通过 X2切换请求消息或者 S1切换请求消息将无线中继节点所辖的用户 设备的上下文信息发送给目标宿主基站； 源宿主基站通过包括以下之一的方式预先从 无线中继节点获取无线中继节点所辖的用户设备的上下文信息： 通过无线资源建立流 程获取无线中继节点所辖的用户设备的上下文信息； 通过 X2切换流程获取无线中继 节点所辖的用户设备的上下文信息;通过 S1切换流程获取无线中继节点所辖的用户设 备的上下文信息； 通过解析无线中继节点与核心网交互的信令获取无线中继节点所辖 的用户设备的上下文信息。 本发明通过源宿主基站将无线中继节点所辖的用户设备的上下文信息发送给目标 宿主基站， 从而使得目标宿主基站还可以根据用户设备的上下文进行接纳控制， 进而 保证接纳控制结果的准确性。 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是根据相关技术的无线中继节点架构的示意图； 图 2是根据相关技术的经核心网切换的流程图； 图 3是根据相关技术的经直接接口切换的流程图； 图 4是根据本发明实施例的无线中继节点切换的处理方法的流程图； 图 5是根据本发明优选实施例的流程图； 图 6是根据本发明实施例的无线中继节点切换的处理系统的结构框图。 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。 本发明提供了一种无线中继节点切换的处理方法， 图 4是根据本发明实施例的无 线中继节点切换的处理方法的流程图，如图 4所示，包括如下的步骤 S402至步骤 S404。 步骤 S402, 源宿主基站确定将无线中继节点切换到目标宿主基站。 步骤 S404,源宿主基站将无线中继节点所辖的用户设备的上下文信息发送给目标 宿主基站， 其中无线中继节点所辖的用户设备的上下文信息是源宿主基站预先从无线 中继节点获取的。 相关技术中， 目标宿主基站仅仅根据无线中继节点的上下文进行接纳控制。 本发 明实施例中， 通过源宿主基站将无线中继节点所辖的用户设备的上下文信息发送给目 标宿主基站， 从而使得目标宿主基站还可以根据用户设备的上下文进行接纳控制， 进 而保证接纳控制结果的准确性。 优选地， 在源宿主基站将无线中继节点所辖的用户设备的上下文信息发送给目标 宿主基站之后， 上述方法还包括： 目标宿主基站接收到无线中继节点所辖的用户设备 的上下文信息； 目标宿主基站根据上下文信息， 对无线中继节点所辖的用户设备进行 接纳控制。 优选地， 目标宿主基站根据上下文信息， 对无线中继节点所辖的用户设备进行接 纳控制包括以下之一： 对于接纳控制成功的用户设备， 目标宿主基站将该用户设备的 无线承载映射到无线中继节点的无线承载上； 和 /或目标宿主基站通过 X2切换请求确 认消息或者 S1切换请求确认消息携带该用户设备的列表;对于接纳控制失败的用户设 备， 目标宿主基站将该用户设备的信息通知无线中继节点， 或者通过与核心网的流程 发起该用户设备的释放。 优选地，源宿主基站通过 X2切换请求消息或者 S1切换请求消息将无线中继节点 所辖的用户设备的上下文信息发送给目标宿主基站。 优选地， 源宿主基站通过包括以下之一的方式预先从无线中继节点获取无线中继 节点所辖的用户设备的上下文信息： 通过无线资源建立流程获取无线中继节点所辖的 用户设备的上下文信息； 通过 X2切换流程获取无线中继节点所辖的用户设备的上下 文信息；通过 S1切换流程获取无线中继节点所辖的用户设备的上下文信息；通过解析 无线中继节点与核心网交互的信令获取无线中继节点所辖的用户设备的上下文信息。 优选地， 用户设备的上下文信息包括以下至少之一： 用户设备的小区无线网络临 时标识 （Cell Radio Network Temporary Identifier, 简称为 C-RNTI)、 用户设备的测量 配置、 用户设备的信令无线承载（Signaling Radio Bearer, 简称为 SRB)配置、 用户设 备的数据无线承载 （Data Radio Bearer, 简称为 DRB) 配置、 用户设备的能力信息、 用户设备的当前服务的移动性管理实体 （Mobile Management Entity, 简称为 MME)。 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。 本实施例描述一组终端 （UEs) 通过无线连接接入无线中继节点 RN。 RN通过源 宿主基站 Source DeNB切换至目标宿主基站 Target DeNB, Source DeNB通过 SI或 X2 的切换信令携带 RN所辖 UE的上下文。 图 5是根据本发明优选实施例的流程图，如图 5所示，包括如下的步骤 S502至步 骤 S512。 步骤 S502， RN根据 OAM的配置以及周围的无线信号， 探测到 Source De B。 RN向 Source DeNB发起 RRC连接建立请求， 并向 Source DeNB指示自己是无线中继 节点。 Source DeNB为 RN选择 MME并建立无线接入承载 （E-UTRAN Radio Access Bearer, 简称为 E-RAB), 在此过程中 MME对 RN进行设备身份验证。 验证通过后， Source DeNB在空口为 RN分配专用的无线资源及数据无线承载。 在此承载之上， RN 与 OAM建立连接获得并更新参数，同时在此承载之上与 RN之间建立 S1及 X2接口。 此时 RN开始建立自己的小区， 并在空口进行系统广播。 步骤 S504, —组 UE从空口探测到并驻留在 RN建立的小区中。 当 UE进入连接 态后， UE与 RN之间建立 RRC连接， RN为 UE分配 C-RNTI、配置测量、 SRB、 DRB 等专用资源。 RN以 e B的身份， 通过 SI Initial UE Message信令， 为此 UE请求建立 E-RAB。 该信令通过 DeNB转发到相应的 MME。 MME通过 SI Initial Context Setup 信令为 UE建立 E-RAB, 同时携带 UE的能力信息。 RN保存上述过程中获得的连接态 UE的上下文信息 （包括 UE的小区无线网络临时标识 （Cell Radio Network Temporary Identifier, 简称为 C-RNTI), UE的测量配置， 信令无线承载 （ Signaling Radio Bearer, SRB) 配置， 数据无线承载 （Data Radio Bearer, 简称为 DRB) 配置， UE能力， UE 当前的 Serving MME等信息的一种或多种）。 步骤 S506， RN通过与 Source DeNB之间的控制面信令（e.g. RRC流程， SI流程 或 X2流程） 向 Source DeNB通知 UE的上下文信息。 步骤 S508, 随着 RN的移动， Source DeNB通过测量报告判断 RN正在接近目标 宿主基站 Target DeNB。 根据网络拓扑连接， Source DeNB选择向 Target DeNB发起直 接接口切换 X2 Handover 或地面侧切换 SI Handover, 并相应的发送 X2 Handover Request或 SI Handover Request消息。消息中指示 RN为无线中继节点， 并携带 RN的 上下文， 同时还要携带在步骤 103中获得的 RN所辖 UE的上下文信息。 步骤 S510， Target DeNB根据 RN的上下文判断可以接纳 RN， 同时根据 Source DeNB在步骤 S508提供的 RN所辖 UE的上下文以及自身的无线资源做进一步的针对 每个 UE的接纳控制。 Target DeNB通过 S1/X2 Handover Request Acknowledge消息携 带接纳控制的结果， 即可以接纳的 UE的列表， 可选的 Target DeNB也可以根据上下 文中保存的 UE的 Serving MME的信息向该 MME发起对此 UE的上下文释放； 或者 Target DeNB将接纳失败的终端列表通过与 RN之间的控制面消息（e.g. RRC流程， SI 流程或 X2流程） 通知 RN， 由 RN进行进一步的释放处理。 对于判断可以接纳的 UE， Target DeNB需要根据配置判断此 UE的 E-RAB, 与它 为 RN建立的 E-RAB之间的对应关系。 步骤 S512， Source DeNB通过 RRC RRCConnectionReconfiguration消息指示 RN 切换到 Target De B。该信令中携带 RN接入到 Target DeNB下的必要的空口配置。 RN 按照新的无线配置与 Target De B 同步， 并向 Target De B 发送 RRC RRCConnectionReconfigurationComplete消息。 需要说明的是， 除了无线中继技术， 本发明还可以应用于其它技术， 例如 L1 Repeater等设备也可能携带一组 UE进行切换， 在这种群组切换 （Group Mobility) 场 景下， 使用本发明的方法也可以实现目标宿主基站还可以根据用户设备的上下文进行 接纳控制， 从而保证接纳控制结果的准确性。 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无线中继节点切换的处理系统， 该无线中继节点切换的 处理系统可以用于实现上述无线中继节点切换的处理方法。 图 6是根据本发明实施例 的无线中继节点切换的处理系统的结构框图， 如图 6所示， 包括源宿主基站 62、 无线 中继节点 64和目标宿主基站 66， 其中， 源宿主基站 62包括确定模块 622和发送模块 624。 下面对其结构进行详细描述。 确定模块 622， 设置为确定将无线中继节点 64切换到目标宿主基站 66; 发送模块
624， 连接至确定模块 622， 设置为将无线中继节点 64所辖的用户设备的上下文信息 发送给确定模块 622确定的目标宿主基站 66， 其中无线中继节点 64所辖的用户设备 的上下文信息是源宿主基站预先从无线中继节点获取的。 优选地， 目标宿主基站 66包括接收模块 662和接纳控制模块 664， 下面对其结构 进行详细描述。 接收模块 662， 设置为接收无线中继节点 62所辖的用户设备的上下文信息； 接纳 控制模块 664， 连接至接收模块 662， 设置为根据接收模块 662接收的上下文信息， 对 无线中继节点 62所辖的用户设备进行接纳控制。 优选地， 接纳控制模块 664包括映射子模块 6642、携带子模块 6644、通知子模块 6646和发起子模块 6648， 下面对其结构进行详细描述。 映射子模块 6642， 设置为对于接纳控制成功的用户设备， 将该用户设备的无线承 载映射到无线中继节点 62的无线承载上； 携带子模块 6644， 设置为对于接纳控制成 功的用户设备，通过 X2切换请求确认消息或者 S1切换请求确认消息携带该用户设备 的列表； 通知子模块 6646， 设置为对于接纳控制失败的用户设备， 将该用户设备的信 息通知无线中继节点 64; 发起子模块 6648， 设置为对于接纳控制失败的用户设备， 通 过与核心网的流程发起该用户设备的释放。 优选地， 发送模块 624通过 X2切换请求消息或者 S1切换请求消息将无线中继节 点 64所辖的用户设备的上下文信息发送给目标宿主基站 66; 源宿主基站 62通过包括 以下之一的方式预先从无线中继节点 64获取无线中继节点 64所辖的用户设备的上下 文信息： 通过无线资源建立流程获取无线中继节点 64所辖的用户设备的上下文信息； 通过 X2切换流程获取无线中继节点 64所辖的用户设备的上下文信息； 通过 S1切换 流程获取无线中继节点 64所辖的用户设备的上下文信息； 通过解析无线中继节点 64 与核心网交互的信令获取无线中继节点 64所辖的用户设备的上下文信息。 需要说明的是， 装置实施例中描述的无线中继节点切换的处理系统对应于上述的 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， 提供了一种无线中继节点切换的处理方法 及系统。 本发明通过源宿主基站将无线中继节点所辖的用户设备的上下文信息发送给 目标宿主基站， 从而使得目标宿主基站还可以根据用户设备的上下文进行接纳控制， 进而保证接纳控制结果的准确性。 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

权 利 要 求 书 一种无线中继节点切换的处理方法， 包括：
源宿主基站确定将无线中继节点切换到目标宿主基站；
所述源宿主基站将所述无线中继节点所辖的用户设备的上下文信息发送给 所述目标宿主基站， 其中所述无线中继节点所辖的用户设备的上下文信息是所 述源宿主基站预先从所述无线中继节点获取的。 根据权利要求 1所述的方法， 其中， 在所述源宿主基站将所述无线中继节点所 辖的用户设备的上下文信息发送给所述目标宿主基站之后， 所述方法还包括： 所述目标宿主基站接收到所述无线中继节点所辖的用户设备的上下文信 息；
所述目标宿主基站根据所述上下文信息， 对所述无线中继节点所辖的用户 设备进行接纳控制。 根据权利要求 2所述的方法， 其中， 所述目标宿主基站根据所述上下文信息， 对所述无线中继节点所辖的用户设备进行接纳控制包括以下之一：
对于接纳控制成功的用户设备， 所述目标宿主基站将该用户设备的无线承 载映射到所述无线中继节点的无线承载上， 和 /或所述目标宿主基站通过 X2切 换请求确认消息或者 S1切换请求确认消息携带该用户设备的列表；
对于接纳控制失败的用户设备， 所述目标宿主基站将该用户设备的信息通 知所述无线中继节点， 或者通过与核心网的流程发起该用户设备的释放。 根据权利要求 1至 3中任一项所述的方法， 其中， 所述源宿主基站通过 X2切 换请求消息或者 S1 切换请求消息将所述无线中继节点所辖的用户设备的上下 文信息发送给所述目标宿主基站。 根据权利要求 1至 3中任一项所述的方法， 其中， 所述源宿主基站通过包括以 下之一的方式预先从所述无线中继节点获取所述无线中继节点所辖的用户设备 的上下文信息：
通过无线资源建立流程获取所述无线中继节点所辖的用户设备的上下文信 通过 X2切换流程获取所述无线中继节点所辖的用户设备的上下文信息； 通过 S1切换流程获取所述无线中继节点所辖的用户设备的上下文信息； 通过解析所述无线中继节点与核心网交互的信令获取所述无线中继节点所 辖的用户设备的上下文信息。
6. 根据权利要求 1至 3中任一项所述的方法， 其中， 所述用户设备的上下文信息 包括以下至少之一： 所述用户设备的小区无线网络临时标识、 所述用户设备的 测量配置、 所述用户设备的信令无线承载配置、 所述用户设备的数据无线承载 配置、所述用户设备的能力信息、所述用户设备的当前服务的移动性管理实体。
7. 一种无线中继节点切换的处理系统， 包括源宿主基站、 无线中继节点和目标宿 主基站， 其中所述源宿主基站包括：
确定模块， 设置为确定将所述无线中继节点切换到所述目标宿主基站； 发送模块， 设置为将所述无线中继节点所辖的用户设备的上下文信息发送 给所述目标宿主基站， 其中所述无线中继节点所辖的用户设备的上下文信息是 所述源宿主基站预先从所述无线中继节点获取的。
8. 根据权利要求 7所述的系统， 其中， 所述目标宿主基站包括：
接收模块， 设置为接收所述无线中继节点所辖的用户设备的上下文信息； 接纳控制模块， 设置为根据所述上下文信息， 对所述无线中继节点所辖的 用户设备进行接纳控制。
9. 根据权利要求 8所述的系统， 其中， 所述接纳控制模块包括： 映射子模块， 设置为对于接纳控制成功的用户设备， 将该用户设备的无线 承载映射到所述无线中继节点的无线承载上；
携带子模块， 设置为对于接纳控制成功的用户设备， 通过 X2切换请求确 认消息或者 S1切换请求确认消息携带该用户设备的列表；
通知子模块， 设置为对于接纳控制失败的用户设备， 将该用户设备的信息 通知所述无线中继节点；
发起子模块， 设置为对于接纳控制失败的用户设备， 通过与核心网的流程 发起该用户设备的释放。
10. 根据权利要求 7至 9中任一项所述的系统， 其中，
所述发送模块通过 X2切换请求消息或者 S1切换请求消息将所述无线中继 节点所辖的用户设备的上下文信息发送给所述目标宿主基站；
所述源宿主基站通过包括以下之一的方式预先从所述无线中继节点获取所 述无线中继节点所辖的用户设备的上下文信息： 通过无线资源建立流程获取所 述无线中继节点所辖的用户设备的上下文信息； 通过 X2切换流程获取所述无 线中继节点所辖的用户设备的上下文信息； 通过 S1 切换流程获取所述无线中 继节点所辖的用户设备的上下文信息； 通过解析所述无线中继节点与核心网交 互的信令获取所述无线中继节点所辖的用户设备的上下文信息。
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CN101754293A (zh) * 2008-12-22 2010-06-23 上海华为技术有限公司 一种切换的方法及相关装置
CN101626565A (zh) * 2009-07-28 2010-01-13 重庆邮电大学 一种移动中继系统中组用户的切换方法
US20110080892A1 (en) * 2009-10-02 2011-04-07 Research In Motion Limited Architecture For Termination At Access Device

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