WO2011018052A1 - 一种发起切换的方法和中继节点 - Google Patents

一种发起切换的方法和中继节点 Download PDF

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Publication number
WO2011018052A1
WO2011018052A1 PCT/CN2010/075979 CN2010075979W WO2011018052A1 WO 2011018052 A1 WO2011018052 A1 WO 2011018052A1 CN 2010075979 W CN2010075979 W CN 2010075979W WO 2011018052 A1 WO2011018052 A1 WO 2011018052A1
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Prior art keywords
base station
serving base
interface
neighboring
information
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PCT/CN2010/075979
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English (en)
French (fr)
Inventor
汪颖
房家奕
鲍炜
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大唐移动通信设备有限公司
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Publication of WO2011018052A1 publication Critical patent/WO2011018052A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0072Transmission or use of information for re-establishing the radio link of resource information of target access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04Large scale networks; Deep hierarchical networks
    • H04W84/042Public Land Mobile systems, e.g. cellular systems
    • H04W84/047Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations

Definitions

  • the present invention relates to the field of mobile communication technologies, and in particular, to a method and a relay node for initiating handover. Background technique
  • Future mobile communication systems such as the B3G (Beyond three Generation) system or LTE-A (Long Term Evolution Advanced), will provide higher peak data rates and cell throughput, as well as more Large bandwidth.
  • B3G Beyond three Generation
  • LTE-A Long Term Evolution Advanced
  • B3G Beyond three Generation
  • LTE-A Long Term Evolution Advanced
  • RN Relay Node
  • the RN is connected to the core network through a donor cell under the DeNB ( Donor evolved Node B), The core network does not have a direct wireless interface, and the interface between the DeNB and the RN is a wireless Un interface.
  • Each RN may control one or more cells, which is equivalent to one eNB (evolved Node B, evolved node ⁇ ), and the RN and the DeNB establish an X2 interface, and the RN is equivalent to one of the DeNBs for other eNBs other than the DeNB.
  • eNB evolved Node B
  • evolved node ⁇
  • the cell, the DeNB terminates the X2 interface between the RN and other eNBs/RNs.
  • the protocol stack architecture of the RN, the DeNB, and other eNBs other than the DeNB is illustrated.
  • both the RN and the DeNB support X2-AP (X2-Application Protocol, X2 Interface Application Protocol).
  • the 3GPP (3rd Generation Partnership Project) specification does not define how the RN knows whether there is an X2 interface between the DeNB and other eNBs.
  • the RN cannot It is judged whether the X2 switch or the S1 switch is initiated. Summary of the invention
  • the embodiment of the invention provides a method for initiating handover and a relay node, which are used to improve the success rate of the handover.
  • An embodiment of the present invention provides a method for initiating a handover, including the following steps:
  • the relay node RN acquires X2 interface indication information between a serving base station and a neighboring base station of the serving base station, where the neighboring base station and the RN are in phase Neighboring cells correspond;
  • the RN determines, by the RN, that an X2 interface exists between the serving base station and the neighboring base station according to the X2 interface indication information, and if yes, the RN initiates an X2 handover; If not, the RN initiates
  • An embodiment of the present invention further provides an RN, including:
  • An acquiring module configured to acquire X2 interface indication information between a serving base station of the RN and a neighboring base station of the serving base station, where the neighboring base station corresponds to a neighboring cell of the RN;
  • a determining module configured to determine, according to the X2 interface indication information acquired by the acquiring module, whether an X2 interface exists between the serving base station and the neighboring base station, when the user equipment of the RN service is switched;
  • a switching module configured to: when the determining module determines that an X2 interface exists between the serving base station and the neighboring base station, initiate an X2 handover; and determine, by the determining module, the service When there is no X2 interface between the serving base station and the neighboring base station, the S1 handover is initiated.
  • the technical solution of the embodiment of the present invention has the following advantages, because when the UE is handed over, the RN determines how to initiate the handover process according to the X2 interface indication information between the serving base station and the base station to which the neighboring cell of the RN belongs, and improves the success rate of the handover. . DRAWINGS
  • FIG. 1 is a schematic diagram of a network architecture of an LTE-A system after introducing an RN in the prior art
  • FIG. 2 is a schematic diagram of a protocol stack architecture of an RN, a DeNB, and other eNBs other than the DeNB in the prior art;
  • FIG. 3 is a flowchart of a method for initiating handover according to Embodiment 1 of the present invention
  • FIG. 4 is a flowchart of a method for initiating handover according to Embodiment 2 of the present invention
  • FIG. 6 is a schematic structural diagram of an RN according to Embodiment 4 of the present invention.
  • FIG. 3 it is a flowchart of a method for initiating handover according to Embodiment 1 of the present invention, which includes the following steps:
  • Step 301 The RN acquires X2 interface indication information between the serving base station and a neighboring base station of the serving base station.
  • the foregoing neighboring base station corresponds to a neighboring cell of the RN, and the RN receives and saves the X2 interface indication information from the serving base station in an X2 establishment process or an X2 configuration update process with the serving base station.
  • the RN receives the X2 setup response message from the serving base station, and the Neighbour Information IE in the X2 setup response message carries the X2 interface indication information, where the X2 interface indication information is used to indicate that the serving base station is adjacent to the serving base station.
  • the RN determines whether there is a neighboring cell of the RN in the neighbor cell information of the serving base station, and if so, saves the X2 interface. Indicates the information; if not, it is confirmed that there is no X2 interface connection between the serving base station and the neighboring base station corresponding to the neighboring cell of the RN.
  • the RN receives the evolved Node B configuration update message from the serving base station, and the Neighbour Information IE in the Node B configuration update message carries the X2 interface indication information, where the X2 interface indication information is used to indicate the serving base station and the serving base station.
  • the RN determines whether there is a neighboring cell of the RN in the neighbor cell information of the serving base station, and if so, The X2 interface indication information is saved; if not, it is confirmed that there is no X2 interface connection between the serving base station and the neighboring base station corresponding to the neighboring cell of the RN.
  • the serving base station Before the RN receives and saves the X2 interface indication information from the serving base station, the serving base station acquires the neighbor cell information of the RN according to the X2 setup request message from the RN or the Neighbour Information IE carried in the evolved Node B configuration update message; When the neighbor cell information changes, the serving base station triggers the X2-AP process.
  • the serving base station After the serving base station acquires the neighbor cell information of the RN according to the Neighbour Information IE carried in the X2 setup request message or the evolved Node B configuration update message, if there is an RN in the cell of the neighboring base station that has the X2 interface connected to the serving base station, The neighboring cell, the serving base station carries the neighbor cell information of the RN and the X2 interface indication information in the Neighbour Information IE in the evolved Node B configuration update message sent to the RN next time.
  • the Neighbour Information IE carried in the X2 setup request message or the evolved Node B configuration update message
  • the serving base station After the serving base station acquires the neighbor cell information of the RN according to the Neighbour Information IE carried in the X2 setup request message from the RN or the Neighbour Information IE carried in the evolved Node B configuration update message, if there is no neighboring base station corresponding to the neighboring cell of the serving base station and the RN
  • the X2 interface is connected, and the serving base station acquires the transport layer address of the neighboring cell of the RN, according to the transmission
  • the transport layer address initiates an X2 interface connection establishment to the neighboring cell of the RN.
  • Step 302 When the user equipment of the RN service is handed over, the RN determines, according to the X2 interface indication information, whether an X2 interface exists between the serving base station and the neighboring base station. If yes, step 303 is performed; if not, step 304 is performed.
  • Step 303 The RN initiates an X2 handover.
  • step 303 is completed.
  • Step 304 The RN initiates an S1 handover.
  • the technical solution of the embodiment of the present invention has the following advantages, because when the UE is handed over, the RN determines how to initiate the handover process according to the X2 interface indication information between the serving base station and the base station to which the neighboring cell of the RN belongs, and improves the success rate of the handover. .
  • FIG. 4 it is a flowchart of a method for initiating handover according to Embodiment 2 of the present invention, which includes the following steps:
  • Step 401 The RN sends an X2 SETUP REQUEST message to the DeNB.
  • Step 402 The DeNB returns an X2 SETUP RESPONSE message to the RN. ⁇ where, X2 SETUP RESPONSE message format, as shown in Table 1, DeNB carries and in the Neighbour Information IE in the X2 SETUP RESPONSE message
  • the X2 interface indication information between neighboring cells of the RN is not limited.
  • Step 403 The RN receives the X2 SETUP RESPONSE message, and checks whether there is a neighboring cell of the RN in the neighbor cell information of the DeNB. If yes, step 404 is performed; if not, step 405 is performed.
  • Step 404 The RN saves the X2 interface indication information.
  • step 406 can be continued.
  • Step 405 The RN confirms that there is no X2 interface connection between the DeNB and the neighboring cell of the RN.
  • Step 406 When the user equipment under the RN is handed over, the RN determines, according to the X2 interface indication information, whether the X2 interface exists between the serving base station and the neighboring base station to which the neighboring cell of the RN belongs. If yes, step 407 is performed; If yes, step 408 is performed.
  • Step 407 the RN initiates an X2 handover.
  • Step 408 the RN initiates an S1 handover.
  • the technical solution of the embodiment of the present invention has the following advantages, because when the UE performs handover, the RN according to the X2 interface indication message between the DeNB and the base station to which the neighboring cell of the RN belongs The information determines how to initiate the handover process and improves the success rate of the handover.
  • FIG. 5 it is a flowchart of a method for initiating handover according to Embodiment 3 of the present invention, which includes the following steps:
  • Step 501 The DeNB sends an ENB CONFIGURATION UPDATE message to the RN, and initiates an X2 interface configuration update process.
  • the format of the ENB CONFIGURATION UPDATE message is as shown in Table 2.
  • the DeNB exchanges all added or modified serving cell information, and carries the X2 interface indication information between the adjacent cell and the Neighbour Information IE in the ENB CONFIGURATION UPDATE message.
  • Step 502 The RN receives the ENB CONFIGURATION UPDATE message, and determines whether there is a neighboring cell of the RN in the neighbor cell information of the DeNB according to the message, if yes, step 503 is performed; if not, step 504 is performed.
  • Step 503 The RN saves the X2 interface indication information.
  • step 505 can be continued.
  • Step 504 The RN confirms that there is no X2 interface connection between the DeNB and the neighboring cell of the RN.
  • the RN when the RN changes the serving cell information, the RN also sends an X2 configuration update message to the DeNB, and the DeNB can determine the next DEB-initiated ENB CONFIGURATION UPDATE message according to the Neighbour Information IE carried in the X2 configuration update message.
  • the Neighbour Information IE carried in the RN obtains the neighbor cell information of the RN. If there is a neighboring cell of the RN in the cell of the other eNB connected to the DeNB, the DeNB may send the Neighbour in the ENB CONFIGURATION UPDATE message sent to the RN next time.
  • the Information IE includes neighbor cell information of the RN and carries X2 interface indication information.
  • Step 505 The RN returns an ENB CONFIGURATION ACKNOWLEDGE message to the DeNB.
  • Step 506 When the user equipment under the RN is handed over, the RN determines, according to the X2 interface indication information, whether the X2 interface exists between the serving base station and the neighboring base station to which the neighboring cell of the RN belongs. If yes, step 507 is performed; If yes, go to step 508.
  • Step 507 the RN initiates an X2 handover.
  • Step 508 the RN initiates an S1 handover.
  • FIG. 6 is a schematic structural diagram of an RN according to Embodiment 4 of the present invention, including:
  • the obtaining module 610 is configured to obtain X2 interface indication information between the base station device where the RN is located and the neighboring cell of the RN.
  • the determining module 620 is configured to determine, according to the X2 interface indication information acquired by the acquiring module 610, whether the base station device where the RN is located and the neighboring cell of the RN exist when the user equipment of the RN is switched. X2 interface.
  • the switching module 630 is configured to: when the determining module 620 determines that the X2 interface exists between the base station device where the RN is located and the neighboring cell of the RN, initiates an X2 switch; and the determining module 620 determines that the RN is located. When there is no X2 interface between the base station device and the neighboring cell of the RN, the S1 handover is initiated.
  • the obtaining module 610 is specifically configured to receive and save the X2 interface indication information from the base station device during the X2 setup process or the X2 configuration update process.
  • the acquiring module 610 is specifically configured to receive an X2 setup response message from the base station device, and the X2 interface between the Neighbor Information IE in the X2 setup response message and the neighboring cell of the RN Instructing information; comparing whether neighboring cells of the RN exist in neighbor cell information of the base station device, if yes, storing the X2 interface indication information; if not, confirming the base station device and the RN There is no X2 interface connection between adjacent cells.
  • the acquiring module 610 is specifically configured to receive a Node B configuration update message from the base station device, where the Neighbor Information IE in the Node B configuration update message carries the neighboring cell of the RN.
  • the X2 interface indication information is compared; whether the neighboring cell of the RN exists in the neighbor cell information of the base station device, if yes, the X2 interface indication information is saved; if not, the base station is confirmed There is no X2 interface connection between the device and the neighboring cell of the RN.
  • the technical solution of the embodiment of the present invention has the following advantages, because when the UE performs handover, the RN determines, according to the X2 interface indication information between the base station device and the neighboring cell of the RN, for example, How to initiate the handover process and improve the success rate of the handover.
  • the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for making a A terminal device (which may be a cell phone, a personal computer, a server, or a network device, etc.) performs the methods described in various embodiments of the present invention.
  • modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the description of the embodiments, or may be correspondingly changed in one or more apparatuses different from the embodiment.
  • the modules of the above embodiments may be integrated into one body or may be deployed separately, may be combined into one module, or may be further split into multiple sub-modules.

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  • Computer Networks & Wireless Communication (AREA)
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Description

一种发起切换的方法和中继节点 本申请要求于 2009 年 8 月 13 日提交中国专利局, 申请号为 200910091196.9, 发明名称为 "一种发起切换的方法和中继节点" 的 中国专利申请的优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及移动通信技术领域,特别是涉及一种发起切换的方法 和中继节点。 背景技术
未来的移动通信系统, 如 B3G ( Beyond three Generation, 后三 代) 系统或 LTE-A ( Long Term Evolution Advanced, 高级长期演进系 统), 将提供更高的峰值数据速率和小区吞吐量, 同时也需要更大的 带宽。 目前, 2GHz以下的未分配带宽已经很少, B3G系统需要的部 分或全部带宽只能在更高的频段上,例如 3GHz以上寻找。频段越高, 电波传播衰减的越快, 传输距离越短, 因此同样覆盖区域下, 要保证 连续覆盖, 需要更多的基站, 由于基站通常具有较高的造价, 无疑会 增加布网成本。
为了解决布网成本问题, 各厂商和标准化组织开始研究将 RN ( Relay Node, 中继节点) 引入到蜂窝系统中, 增加网络覆盖率。 如 图 1所示, 为引入 RN后的 LTE-A系统的网络架构示意图, RN通过 DeNB ( Donor evolved Node B, 施主演进型节点 B ) 下的 donor cell (施主小区)接入到核心网, 和核心网没有直接的无线接口, DeNB 和 RN间的接口为无线 Un口。 每个 RN可以控制一个或多个小区, 相当于一个 eNB ( evolved Node B , 演进型节点 Β ) , RN和 DeNB建 立 X2接口, RN对于 DeNB之外的其他 eNB而言, 相当于 DeNB下 的一个小区 , DeNB终结 RN和其他 eNB/RN间的 X2接口。 如图 2 所示, 为 RN、 DeNB以及 DeNB之外的其他 eNB的协议栈架构示意 图, 其中, RN和 DeNB均支持 X2-AP ( X2-Application Protocol, X2 接口应用协议)。
发明人在实现本发明的过程中, 发现现有技术至少存在如下问 题:
目前, 3GPP ( 3rd Generation Partnership Project, 第三代合作伙 伴计划)规范中没有定义 RN如何获知 DeNB和其他 eNB间是否有 X2接口, 当 RN下的 UE切换到其他 eNB管理下的小区时, RN无法 判断发起 X2切换还是 S1切换。 发明内容
本发明实施例提供一种发起切换的方法和中继节点,用于提高切 换的成功率。
本发明实施例提出一种发起切换的方法, 包括以下步骤: 中继节点 RN获取服务基站与该服务基站的相邻基站之间的 X2 接口指示信息, 所述相邻基站与所述 RN的相邻小区相对应;
当所述 RN服务的用户设备发生切换时, 所述 RN根据所述 X2 接口指示信息判断所述服务基站与所述相邻基站之间是否存在 X2接 口, 如果存在, 所述 RN发起 X2切换; 如果不存在, 所述 RN发起
S1切换。
本发明实施例还提出一种 RN, 包括:
获取模块, 用于获取所述 RN的服务基站与该服务基站的相邻基 站之间的 X2接口指示信息, 所述相邻基站与所述 RN的相邻小区相 对应;
判断模块, 用于在所述 RN服务的用户设备发生切换时, 根据所 述获取模块获取的 X2接口指示信息判断所述服务基站与所述相邻基 站之间是否存在 X2接口;
切换模块,用于在所述判断模块判断所述服务基站与所述相邻基 站之间存在 X2接口时, 发起 X2切换; 在所述判断模块判断所述服 务基站与所述相邻基站之间不存在 X2接口时, 发起 S 1切换。
本发明实施例的技术方案具有以下优点,因为在 UE发生切换时, RN根据服务基站和 RN的相邻小区所属的基站之间的 X2接口指示 信息确定如何发起切换过程, 提高了切换的成功率。 附图说明
图 1为现有技术中的引入 RN后的 LTE-A系统的网络架构示意 图;
图 2为现有技术中的 RN、 DeNB以及 DeNB之外的其他 eNB的 协议栈架构示意图;
图 3为本发明实施例一中的一种发起切换的方法流程图; 图 4为本发明实施例二中的一种发起切换的方法流程图; 图 5为本发明实施例三中的一种发起切换的方法流程图; 图 6为本发明实施例四中的一种 RN的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方 案进行清楚、 完整地描述, 显然, 所描述的实施例是本发明一部分实 施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技 术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属 于本发明保护的范围。
如图 3 所示, 为本发明实施例一中的一种发起切换的方法流程 图, 包括以下步骤:
步骤 301 , RN获取服务基站与该服务基站的相邻基站之间的 X2 接口指示信息。
具体地, 上述相邻基站与 RN的相邻小区相对应, RN在与服务 基站之间的 X2建立过程或 X2配置更新过程中, 接收并保存来自服 务基站的 X2接口指示信息。 在 X2建立过程中, RN接收来自服务基站的 X2建立响应消息, X2建立响应消息中的 Neighbour Information IE携带 X2接口指示信 息, X2接口指示信息用于指示所述服务基站与该服务基站的相邻基 站之间是否存在 X2接口; 当服务基站与该服务基站的相邻基站之间 存在 X2接口, RN判断服务基站的相邻小区信息中是否存在 RN的 相邻小区, 如果有, 则保存 X2接口指示信息; 如果没有, 则确认服 务基站和 RN的相邻小区对应的相邻基站之间没有 X2接口连接。
在 X2配置更新过程中, RN接收来自服务基站的演进型节点 B 配置更新消息, 节点 B配置更新消息中的 Neighbour Information IE 携带 X2接口指示信息, X2接口指示信息用于指示服务基站与该服 务基站的相邻基站之间是否存在 X2接口; 当服务基站与该服务基站 的相邻基站之间存在 X2接口, RN判断服务基站的相邻小区信息中 是否存在 RN的相邻小区, 如果有, 则保存 X2接口指示信息; 如果 没有, 则确认服务基站和 RN 的相邻小区对应的相邻基站之间没有 X2接口连接。
RN接收并保存来自服务基站的 X2接口指示信息之前, 服务基 站根据来自 RN的 X2 建立请求消息或者演进型节点 B配置更新消息 中携带的 Neighbour Information IE获取 RN的相邻小区信息; 当 RN 的相邻小区信息发生改变时, 服务基站触发 X2-AP过程。
服务基站根据来自 RN的 X2 建立请求消息或者演进型节点 B配 置更新消息中携带的 Neighbour Information IE获取 RN的相邻小区信 息之后, 如果和服务基站存在 X2接口连接的相邻基站的小区中存在 RN的相邻小区, 服务基站在下一次发送给 RN的演进型节点 B配置 更新消息中的 Neighbour Information IE中携带 RN的相邻小区信息和 X2接口指示信息。
服务基站根据来自 RN的 X2 建立请求消息或者演进型节点 B配 置更新消息中携带的 Neighbour Information IE获取 RN的相邻小区信 息之后, 如果服务基站和 RN 的相邻小区对应的相邻基站之间没有 X2接口连接, 服务基站获取 RN的相邻小区的传输层地址, 根据传 输层地址向 RN的相邻小区发起 X2接口连接建立。
步骤 302 , 当 RN服务的用户设备发生切换时, RN根据 X2接 口指示信息判断服务基站与相邻基站之间是否存在 X2接口, 如果存 在, 则执行步骤 303 ; 如果不存在, 则执行步骤 304。
步骤 303 , RN发起 X2切换。
需要指出的是, 步骤 303完成以后可以结束此流程。
步骤 304 , RN发起 S 1切换。
本发明实施例的技术方案具有以下优点,因为在 UE发生切换时, RN根据服务基站和 RN的相邻小区所属的基站之间的 X2接口指示 信息确定如何发起切换过程, 提高了切换的成功率。 如图 4 所示, 为本发明实施例二中的一种发起切换的方法流程 图, 包括以下步骤:
步骤 401 , RN向 DeNB发送 X2 SETUP REQUEST ( X2建立请 求) 消息。
步骤 402 , DeNB向 RN返回 X2 SETUP RESPONSE ( X2建立响 应) 消息。 < 其中, X2 SETUP RESPONSE消息格式, 如表 1所示, DeNB在 X2 SETUP RESPONSE消息中的 Neighbour Information IE中携带和
RN的相邻小区之间的 X2接口指示信息。
X2 SETUP RESPONSE消息格式表
IE/组名 (Group 存在性 范围 信息元 语义 危险 赋予的
Name ) ( Presenc ( ange 素类型 描述 程度 危险程
e ) ) 和存在 ( Sema ( Critic 度
性( IE ntics ality )
type and descripti ned referenc on ) Criticali e ) ty ) 消息类型 M 9.2.13 YES reject
( Message Type ) (是) (拒 绝) 全球的 eNB ID M 9.2.22 YES reject ( GlobaleNB ID )
服务小区 eNB中 1 所有 YES reject ( Served Cells ) 到最大 eNB
的小区 小区
数( 1 to ( This
maxCelli is all the
n eNB ) eNB
cells )
>服务小区信息 M 9.2.8
( Served Cell
Information )
>邻居信息 邻居数
( Neighbour 的 0到最
Information ) 大值 ( 0
to max
no of
Neighbo
urs )
»ECGI M ECGI 邻居小
9.2.14 区的
E-UTR
AN小
区全球
标识
( E-UT
RAN
Cell
Global
Identifie
r of the
neighbo
ur cell )
»PCI M INTEG 邻居小 ER (整 区的物
数) 理小区
(0..503, 标识
…) ( Physi
cal Cell
Identifie
r of the
neighbo
ur cell )
»EARFCN M 9.2.26 FDD的
DL EARFC
N和
TDD的
EARFC
N (DL
EARFC
Nfor
FDD
and
EARFC
Nfor
TDD)
>>X2指示 (X2 0 指示 Yes 忽略
Indication ) eNB和 ( Ignor 邻小区 e) 是否存
在 X2接
口连接。
GU组 ID列表 0到最大 eNB归 公共的 reject
( GU Group Id 池数( 0 属的所 (GLO
List) to 有的池 BAD
maxPool (This
s) is all the
pools to
which
the eNB
belongs to )
>GU组 ID ( GU M 9.2.20 - - Group Id )
危险程度判断 0 9.2.7 YES 忽略 ( Criticality ( ignor Diagnostics ) e )
步骤 403 , RN接收 X2 SETUP RESPONSE消息 , 查看 DeNB的 相邻小区信息中是否存在 RN的相邻小区,如果有, 则执行步骤 404; 如果没有, 则执行步骤 405。
步骤 404 , RN保存 X2接口指示信息。
需要指出的是, 步骤 404完成以后可以继续执行步骤 406。
步骤 405 , RN确认 DeNB和 RN的相邻小区之间没有 X2接口连 接。
步骤 406 , 当 RN下的用户设备发生切换时, RN根据 X2接口指 示信息判断服务基站与 RN的相邻小区所属的相邻基站之间是否存在 X2接口,如果存在, 则执行步骤 407; 如果不存在, 则执行步骤 408。
步骤 407, RN发起 X2切换。
需要指出的是, 步骤 407完成以后可以结束此流程。
步骤 408, RN发起 S1切换。
需要说明的是,本发明实施例方法可以根据实际需要对各个步骤 顺序进行调整。
本发明实施例的技术方案具有以下优点,因为在 UE发生切换时, RN根据 DeNB和 RN的相邻小区所属的基站之间的 X2接口指示信 息确定如何发起切换过程, 提高了切换的成功率。 如图 5 所示, 为本发明实施例三中的一种发起切换的方法流程 图, 包括以下步骤:
步骤 501 , DeNB向 RN发送 ENB CONFIGURATION UPDATE ( eNB配置更新) 消息, 发起 X2接口配置更新过程。
具体地, ENB CONFIGURATION UPDATE消息的格式, 如表 2 所示。 DeNB 交换所有增加或者修改的服务小区信息, 在 ENB CONFIGURATION UPDATE消息中的 Neighbour Information IE中携 带和相邻小区之间的 X2接口指示信息。
ENB CONFIGURATION UPDATE消息格式表
IE/组名 存在 值域 IE类型 语义描 危险程度 赋予的
( IE/Group ( Presenc ( ange ) 以及参 述 ( Critical 危险程
Name ) e ) 考 (IE ( Sema ity ) 度 type ntics ( Assign and descripti ed referen on ) Criticalit ce ) y ) 消息类型 M 9.2.13 YES (是) reject
( Message (拒绝)
Type )
Add的服务小 eNB中小 公用的 reject 区 (Served 区 0到最 ( GLOB
Cells To Add ) 大值(O to AL )
maxCellin
eNB )
>服务小区信 M 9.2.8
息( Served Cell
Information )
>邻居信息 0到最大
( Neighbour 邻居值(0
Information ) to
maxnoof Neighbou
rs )
»ECGI M ECGI 邻居小
9. 区的 2.14 E-UT AN小区 全球标 识 ( E-UT RAN
Cell Global Identifie r of the neighbo ur cell )
»PCI M INTEG 邻居小
ER (整 区的物 数) 理小区 (0..503, 标识
…) ( Physi cal Cell Identifie r of the neighbo ur cell )
»EA FCN M 9.2.26 FDD的
DL EARFC
N以及 TDD的 EARFC
N ( DL EARFC
N for FDD
and EARFC N for
TDD )
» X2指示( X2 0 指示 Yes Ignore Indication ) eNB和
邻小区
是否存
在 X2接
口连接。
修改的服务小 O to GLOBAL reject 区 (Served maxCellin
Cells To eNB
Modify )
>01d ECGI M ECGI 这是原
9. E-UT
2.14 AN小区
全球标
识 ( This
is the
old
E-UTR
AN Cell
Global
Identifie
r )
>服务小区信 M 9.2.8
息( Served Cell
Information )
>邻居信息 0到最大
( Neighbour 邻居数(0
Information ) to
maxnoof
Neighbou
rs )
»ECGI M ECGI 邻居小
9. 区的
2.14 E-UTR AN小区
全球标
( E-UT
RAN
Cell
Global
Identifie
r of the
neighbo
ur cell )
»PCI M INTEG 邻居小
E 区的物
(0..503, 理小区
…) 标识
( Physi
cal Cell
Identifie
r of the
neighbo
ur cell )
»EA FCN M 9.2.26 DL
EARFC
N for
FDD
and
EARFC
N for
TDD
»X2 0 指示 Yes Ignore
Indication ( X2 eNB和 (忽略) 指示) 邻小区
是否存
在 X2接
口连接。 删除的服务小 eNB小区 GLOBAL reject 区 (Served 数 0到最 (整体)
Cells To 大值(O to
Delete ) max Cell
in eNB )
>01d ECGI M ECGI
9. 要删除
2.14 的小区
的原
E-UTR
AN小区
全球标
识 ( This
is the
old
E-UTR
AN Cell
Global
Identifie
r of the
cell to
be
deleted )
增加的 GU组 O to GLOBAL reject ID 列表 ( GU maxPools
Group Id To
Add List )
>GU组 ID( GU M 9.2.20 - - Group Id )
删除的 GU组 O to GLOBAL reject ID列表(GU maxPools
Group Id To
Delete List )
>GU Group Id M 9.2.20 - - 步骤 502, RN接收 ENB CONFIGURATION UPDATE消息, 根 据该消息判断 DeNB的相邻小区信息中是否存在 RN的相邻小区,如 果有, 则执行步骤 503; 如果没有, 则执行步骤 504。
步骤 503 , RN保存 X2接口指示信息。
需要指出的是, 步骤 503完成以后可以继续执行步骤 505。
步骤 504, RN确认 DeNB和 RN的相邻小区之间没有 X2接口连 接。
需要说明的是, RN在发生服务小区信息改变时, 也会向 DeNB 发送 X2配置更新消息, DeNB可以根据 RN在 X2配置更新消息中携 带的 Neighbour Information IE 来决定下一次 DeNB 发起的 ENB CONFIGURATION UPDATE消息中携带的 Neighbour Information IE, 获取 RN的相邻小区信息,如果和 DeNB存在 X2接口连接的其他 eNB 的小区中有 RN的相邻小区 , DeNB可以在下一次发送给 RN的 ENB CONFIGURATION UPDATE消息中的 Neighbour Information IE中包 含 RN的相邻小区信息, 并携带 X2接口指示信息。
步骤 505 , RN 向 DeNB 返回 ENB CONFIGURATION ACKNOWLEDGE ( eNB配置应答 ) 消息。
步骤 506 , 当 RN下的用户设备发生切换时, RN根据 X2接口指 示信息判断服务基站与 RN的相邻小区所属的相邻基站之间是否存在 X2接口,如果存在, 则执行步骤 507; 如果不存在, 则执行步骤 508。
步骤 507, RN发起 X2切换。
需要指出的是, 步骤 507完成以后可以结束此流程。
步骤 508, RN发起 S1切换。
需要说明的是,本发明实施例可以根据实际需要对各个步骤顺序 进行调整。
本发明实施例的技术方案具有以下优点,因为在 UE发生切换时, RN根据 DeNB和 RN的相邻小区所属的基站之间的 X2接口指示信 息确定如何发起切换过程,提高了切换的成功率,并减少了 Neighbour Information IE携带的小区数量。 如图 6所示, 为本发明实施例四中的一种 RN的结构示意图, 包 括:
获取模块 610 , 用于获取所述 RN所在的基站设备与所述 RN的 相邻小区之间的 X2接口指示信息。
判断模块 620 , 用于在所述 RN下的用户设备发生切换时, 根据 所述获取模块 610获取的 X2接口指示信息判断所述 RN所在的基站 设备与所述 RN的相邻小区之间是否存在 X2接口。
切换模块 630 , 用于在所述判断模块 620判断所述 RN所在的基 站设备与所述 RN的相邻小区之间存在 X2接口时, 发起 X2切换; 在所述判断模块 620判断所述 RN所在的基站设备与所述 RN的相邻 小区之间不存在 X2接口时, 发起 S 1切换。
上述获取模块 610 , 具体用于在 X2建立过程或 X2配置更新过 程中, 接收并保存来自所述基站设备的 X2接口指示信息。
在 X2建立过程中, 上述获取模块 610 , 具体用于接收来自所述 基站设备的 X2 建立响应消息, X2 建立响应消息中的 Neighbour Information IE中携带和所述 RN的相邻小区之间的 X2接口指示信 息; 比较所述基站设备的相邻小区信息中是否存在所述 RN的相邻小 区, 如果有, 则将保存所述 X2接口指示信息; 如果没有, 则确认所 述基站设备和所述 RN的相邻小区之间没有 X2接口连接。
在 X2配置更新过程中, 上述获取模块 610 , 具体用于接收来自 所述基站设备的节点 B配置更新消息, 所述节点 B配置更新消息中 的 Neighbour Information IE中携带和所述 RN的相邻小区之间的 X2 接口指示信息; 比较所述基站设备的相邻小区信息中是否存在所述 RN的相邻小区, 如果有, 则将保存所述 X2接口指示信息; 如果没 有, 则确认所述基站设备和所述 RN的相邻小区之间没有 X2接口连 接。
本发明实施例的技术方案具有以下优点,因为在 UE发生切换时, RN根据基站设备和 RN的相邻小区之间的 X2接口指示信息确定如 何发起切换过程, 提高了切换的成功率。
通过以上的实施方式的描述,本领域的技术人员可以清楚地了解 到本发明可借助软件加必需的通用硬件平台的方式来实现, 当然也可 以通过硬件,但很多情况下前者是更佳的实施方式。基于这样的理解, 本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以 软件产品的形式体现出来, 该计算机软件产品存储在一个存储介质 中, 包括若干指令用以使得一台终端设备(可以是手机,个人计算机, 服务器, 或者网络设备等)执行本发明各个实施例所述的方法。
以上所述仅是本发明的优选实施方式, 应当指出, 对于本技术领 域的普通技术人员来说, 在不脱离本发明原理的前提下, 还可以做出 若干改进和润饰, 这些改进和润饰也应视本发明的保护范围。
本领域技术人员可以理解实施例中的装置中的模块可以按照实 施例描述进行分布于实施例的装置中,也可以进行相应变化位于不同 于本实施例的一个或多个装置中。 上述实施例的模块可以集成于一 体, 也可以分离部署, 可以合并为一个模块, 也可以进一步拆分成多 个子模块。
上述本发明实施例序号仅仅为了描述, 不代表实施例的优劣。 以上公开的仅为本发明的几个具体实施例, 但是, 本发明并非局 限于此,任何本领域的技术人员能思之的变化都应落入本发明的保护 范围。

Claims

权利要求
1、 一种发起切换的方法, 其特征在于, 包括以下步骤: 中继节点 RN获取服务基站与该服务基站的相邻基站之间的 X2 接口指示信息, 所述相邻基站与所述 RN的相邻小区相对应;
当所述 RN服务的用户设备发生切换时, 所述 RN根据所述 X2 接口指示信息判断所述服务基站与所述相邻基站之间是否存在 X2接 口, 如果存在, 所述 RN发起 X2切换; 如果不存在, 所述 RN发起 S1切换。
2、 如权利要求 1所述的方法, 其特征在于, 所述 RN获取服务 设备与所述相邻基站之间的 X2接口指示信息, 具体包括:
所述 RN在与所述服务基站之间的 X2建立过程或 X2配置更新 过程中, 接收并保存来自所述服务基站的 X2接口指示信息。
3、 如权利要求 2所述的方法, 其特征在于, 在 X2建立过程中, 所述 RN接收并保存来自所述服务基站的 X2接口指示信息, 具体包 括:
所述 RN接收来自所述服务基站的 X2建立响应消息, X2建立响 应消息中的邻居信息 Neighbour Information IE携带 X2接口指示信 息, 所述 X2接口指示信息用于指示所述服务基站与该服务基站的相 邻基站之间是否存在 X2接口;
当所述服务基站与该服务基站的相邻基站之间存在 X2接口, 所 述 RN判断所述服务基站的相邻小区信息中是否存在所述 RN的相邻 小区, 如果有, 则保存所述 X2接口指示信息; 如果没有, 则确认所 述服务基站和所述 RN的相邻小区对应的相邻基站之间没有 X2接口 连接。
4、 如权利要求 2所述的方法, 其特征在于, 在 X2配置更新过 程中, 所述 RN接收并保存来自所述服务基站的 X2接口指示信息, 具体包括:
所述 RN接收来自所述服务基站的演进型节点 B配置更新消息, 所述节点 B配置更新消息中的 Neighbour Information IE携带 X2接口 指示信息, 所述 X2接口指示信息用于指示所述服务基站与该服务基 站的相邻基站之间是否存在 X2接口;
当所述服务基站与该服务基站的相邻基站之间存在 X2接口, 所 述 RN判断所述服务基站的相邻小区信息中是否存在所述 RN的相邻 小区, 如果有, 则保存所述 X2接口指示信息; 如果没有, 则确认所 述服务基站和所述 RN的相邻小区对应的相邻基站之间没有 X2接口 连接。
5、 如权利要求 2所述的方法, 其特征在于, 所述 RN接收并保 存来自所述服务基站的 X2接口指示信息之前, 还包括:
所述服务基站根据来自所述 RN的 X2 建立请求消息或者演进型 节点 B配置更新消息中携带的 Neighbour Information IE获取所述 RN 的相邻小区信息;
当所述 RN 的相邻小区信息发生改变时, 所述服务基站触发 X2-AP过程。
6、 如权利要求 5所述的方法, 其特征在于, 所述服务基站根据 来自所述 RN的 X2 建立请求消息或者演进型节点 B配置更新消息中 携带的 Neighbour Information IE获取所述 RN的相邻小区信息之后 , 还包括:
如果和所述服务基站存在 X2接口连接的相邻基站的小区中存在 所述 RN的相邻小区, 所述服务基站在下一次发送给所述 RN的演进 型节点 B配置更新消息中的 Neighbour Information IE中携带所述 RN 的相邻小区信息和 X2接口指示信息。
7、 如权利要求 5所述的方法, 其特征在于, 所述服务基站根据 来自所述 RN的 X2 建立请求消息或者演进型节点 B配置更新消息中 携带的 Neighbour Information IE获取所述 RN的相邻小区信息之后 , 还包括:
如果所述服务基站和所述 RN的相邻小区对应的相邻基站之间没 有 X2接口连接, 所述服务基站获取所述 RN的相邻小区的传输层地 址, 根据所述传输层地址向所述 RN的相邻小区发起 X2接口连接建 立。
8、 一种 RN, 其特征在于, 包括:
获取模块,用于获取所述 RN的服务基站与该服务基站的相邻基 站之间的 X2接口指示信息, 所述相邻基站与所述 RN的相邻小区相 对应;
判断模块, 用于在所述 RN服务的用户设备发生切换时, 根据所 述获取模块获取的 X2接口指示信息判断所述服务基站与所述相邻基 站之间是否存在 X2接口;
切换模块,用于在所述判断模块判断所述服务基站与所述相邻基 站之间存在 X2接口时, 发起 X2切换; 在所述判断模块判断所述服 务基站与所述相邻基站之间不存在 X2接口时, 发起 S 1切换。
9、 如权利要求 8所述 RN, 其特征在于,
所述获取模块, 具体用于在所述 RN与所述服务基站之间的 X2 建立过程或 X2 配置更新过程中, 接收并保存来自所述服务基站的 X2接口指示信息。
10、 如权利要求 9所述 RN, 其特征在于, 在 X2建立过程中, 所述获取模块, 具体用于接收来自所述服务基站的 X2建立响应 消息, X2建立响应消息中的 Neighbour Information IE中携带 X2接 口指示信息, 所述 X2接口指示信息用于指示所述服务基站与该服务 基站的相邻基站之间是否存在 X2接口;
当所述服务基站与该服务基站的相邻基站之间存在 X2接口, 判 断所述服务基站的相邻小区信息中是否存在所述 RN的相邻小区,如 果有, 则保存所述 X2接口指示信息; 如果没有, 则确认所述服务基 站和所述 RN的相邻小区对应的相邻基站之间没有 X2接口连接。
11、 如权利要求 9所述 RN, 其特征在于, 在 X2配置更新过程 中,
所述获取模块,具体用于接收来自所述服务基站的演进型节点 B 配置更新消息, 所述节点 B配置更新消息中的 Neighbour Information IE中携带 X2接口指示信息, 所述 X2接口指示信息用于指示所述服 务基站与该服务基站的相邻基站之间是否存在 X2接口;
当所述服务基站与该服务基站的相邻基站之间存在 X2接口, 判 断所述服务基站的相邻小区信息中是否存在所述 RN的相邻小区,如 果有, 则保存所述 X2接口指示信息; 如果没有, 则确认所述服务基 站和所述 RN的相邻小区对应的相邻基站之间没有 X2接口连接。
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