WO2010078728A1 - 一种基于长期演进系统的小区能力信息通知方法 - Google Patents

一种基于长期演进系统的小区能力信息通知方法 Download PDF

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Publication number
WO2010078728A1
WO2010078728A1 PCT/CN2009/070111 CN2009070111W WO2010078728A1 WO 2010078728 A1 WO2010078728 A1 WO 2010078728A1 CN 2009070111 W CN2009070111 W CN 2009070111W WO 2010078728 A1 WO2010078728 A1 WO 2010078728A1
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cell
base station
information
capability information
message
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PCT/CN2009/070111
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English (en)
French (fr)
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费腾
高音
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中兴通讯股份有限公司
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Priority to PCT/CN2009/070111 priority Critical patent/WO2010078728A1/zh
Publication of WO2010078728A1 publication Critical patent/WO2010078728A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/02Arrangements for optimising operational condition

Definitions

  • the present invention relates to a Long Term Evolution (LTE) mobile communication system, and in particular to a cell capability information notification method based on a Long Term Evolution (LTE) system.
  • LTE Long Term Evolution
  • the LTE network is composed of an E-UTRAN (Evolved UTRAN) base station (eNB, Evolved NodeB) and an EPC (Evolved Packet Core) EPC (Evolved Packet Core), and the network is flattened.
  • the E-UTRAN base station includes a set of eNBs connected to the EPC through the S1 interface, and the eNBs can be connected through X2. Sl and X2 are logical interfaces.
  • One EPC can manage one or more eNBs, and one eNB can also be controlled by multiple EPCs, and one eNB can manage one or more cells.
  • Self-organizing network is a technology that automatically performs network configuration and optimization.
  • the feature of the technology is self-configuration self-optimization.
  • the application of the technology in LTE enables the LTE base station (eNB) to automatically configure network parameters according to certain measurements and automatically optimize according to network changes, thereby maintaining optimal network performance and saving a large amount of money. Human and material resources.
  • the cell capabilities may be different. For example, whether the cell supports multimedia broadcast and multicast service MBMS (Multimedia Broadcast/Multicast Service), in order to better provide MBMS service services, it is necessary to know each other between adjacent cells. MBMS capabilities. When the neighboring cell does not belong to the same eNB, how to know the cell capacity of the neighboring cell is a problem that needs to be solved. Summary of the invention
  • the technical problem to be solved by the present invention is to provide a cell capability information notification method based on the Long Term Evolution (LTE) system, so that neighboring base stations can learn the cell capability information of the serving cell under the jurisdiction of the other party.
  • LTE Long Term Evolution
  • the information notification method is configured to establish a transport layer link between the first base station and the second base station, where the method includes:
  • the first base station sends an X2 interface message to the second base station, where the X2 interface message carries the serving cell information of the serving cell that is controlled by the first base station, where the serving cell information of each serving cell includes Cell capability information of the cell;
  • the second base station After receiving the X2 interface message, the second base station saves the service cell information in the X2 interface message.
  • the X2 interface message is an X2 interface setup request message, an X2 setup response message, or a configuration update message.
  • the first base station When the X2 interface message is an X2 interface setup request message or an X2 setup response message, the first base station carries the service cell information of all serving cells under its jurisdiction in the X2 interface message.
  • the cell capability information includes at least information about whether the cell supports the multimedia broadcast and the multicast service MBMS.
  • a new cell is added to the X2 interface message to carry the cell capability information.
  • the cell capability information of the neighboring cell of the serving cell is also sent to the base station.
  • the technical solution of the present invention enables the neighboring base stations to know the cell capability information of the serving cell under the jurisdiction of the other party.
  • 1 is a cell structure diagram showing cell capability information added in Served Cell Information
  • Figure 3 is a schematic flow chart of a specific embodiment 2. Preferred embodiment of the invention
  • the eNB may perform the cell capability of all the cells in the process of establishing the X2 interface between the neighboring eNBs or the eNB configuration update after the X2 interface is established. Information is sent to the department near e NB.
  • the base station A and the base station B are taken as an example to describe the process of transmitting cell capability information between the two base stations.
  • the base station A only administers the cell a
  • the base station B only administers the cell b.
  • the specific process is shown in FIG. 2 . Includes the following steps:
  • the base station A When the X2 interface is to be established between the base station A and the base station B, the base station A sends an X2 interface setup request message to the base station B, where the message carries the service cell information (Served Cell Information) of the cell a, where the service cell information is included. Containing cell capability information of cell a, for example, whether cell a supports MBMS;
  • the base station A may also carry the cell capability information of all the neighboring cells of the cell a in the X2 interface setup request message.
  • the base station A reads the neighbor cell information saved in the cell a, and Transmitting the cell capability information of all cells adjacent to the cell a recorded in the information together with the cell capability information of the cell a to the base station B;
  • the neighboring cell information of each cell includes at least an identifier of a cell adjacent to the current cell and cell capability information of a cell adjacent to the local cell;
  • the base station A when the base station A is in charge of a plurality of serving cells, the base station A will carry the cell capability information of all serving cells under its jurisdiction in the X2 interface setup request message.
  • the base station B After receiving the foregoing X2 setup request message, the base station B, if the processing succeeds, that is, the X2 interface is successfully established, saves the cell capability information of the cell a in the X2 setup request message, and returns an X2 setup response message to the base station A, the response The message carries the cell information of the cell b, and the cell information includes the cell capability information of the cell b, for example, the capability of the cell b to support the MBMS. If the process fails, that is, the base station B fails to establish the X2 interface with the base station A, the base station B Return to base station A X2 establishes a failure message;
  • the base station B when the X2 setup request message includes the serving cell power information of the multiple cells, the base station B saves the serving cell information of the multiple cells; and the X2 setup request message further includes the cell a When serving cell information of all neighboring cells, the base station B may save all the serving cell information of all cells adjacent to the cell a, or may only update the serving cell information of the locally saved cell.
  • the base station B may also carry the cell capability information of all neighboring cells of the cell b in the X2 setup response message.
  • the base station B reads the neighbor cell information saved in the cell b. And transmitting the cell capability information of all cells adjacent to the cell b recorded in the information together with the cell capability information of the cell b to the base station A;
  • base station B if base station B is in charge of a plurality of cells, base station B carries cell capability information of all cells under its jurisdiction in the X2 setup response message.
  • the base station carries the cell capability information by adding a cell in the X2 interface setup request message or the X2 setup response message, and the specific newly added cell may use the enumeration manner to indicate the cell capability information, as shown in FIG. Show.
  • the process of updating the neighbor cell capability information between the base station A and the base station B, as shown in FIG. 3, includes the following steps:
  • the base station A sends an eNB configuration update message to the base station B, and carries the serving cell information of the cell a in the eNB configuration update message, where the serving cell information includes the information that the cell a does not support the MBMS.
  • the base station B After receiving the eNB configuration update message sent by the base station A, the base station B, if the processing succeeds, updates the cell capability information of the neighboring cell a to the unsupported MBMS service in the neighboring cell information of the cell b, and returns the eNB to the base station A.
  • Configuration information update confirmation message if the processing fails, When the base station B processes the eNB configuration update failure, the base station B returns the eNB configuration update failure to the base station A.
  • the case of triggering the configuration update further includes: adding a cell, deleting a cell, or modifying a cell under the jurisdiction of the base station, where the cell modification refers to any one or more of the following situations:
  • the configuration update message carries only the serving cell information of the cell in which the configuration update occurs.
  • the configuration update message carries the ID information of the deleted serving cell.
  • the cell update information of the neighboring cell changes, and the process of updating the configuration is also triggered.
  • the base station carries the cell capability information by adding a cell in the configuration update message, and the specific newly added cell may use the enumeration manner to represent the cell capability information, as shown in FIG. 1 .
  • the technical solution of the present invention enables the neighboring base stations to know the cell capacity of the serving cell under the jurisdiction of the other party, so that when the terminal in the cell under the jurisdiction of any base station needs to switch to the preferred target cell, or When the cell needs to perform load balancing or overload control to select a target cell for the terminal, it can be correctly determined according to the cell capability information of each cell adjacent to the cell in the neighbor cell information under the cell.

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

Description

一种基于长期演进系统的小区能力信息通知方法
技术领域
本发明涉及长期演进( LTE, Long Term Evolution )移动通信系统, 特别 涉及一种基于长期演进 LTE系统的小区能力信息通知方法。
背景技术
标准 36300-800中描述 LTE网络由 E-UTRAN ( Evolved UTRAN )基站 ( eNB, Evolved NodeB )和演进分组交换中心 EPC ( Evolved Packet Core )组 成, 网络扁平化。 其中 E-UTRAN基站包含和 EPC通过 S1接口连接的 eNB 的集合, eNB之间能通过 X2连接。 Sl、 X2是逻辑接口。 一个 EPC可以管理 一个或多个 eNB, —个 eNB也可以受控于多个 EPC, —个 eNB可以管理一 个或多个小区。
自组网 (SON )是一种自动进行网络配置和优化的技术。 该技术的特点 是自配置自优化, 该技术在 LTE中应用使得 LTE基站(eNB )可以根据一定 的测量自动配置网络参数, 并根据网络变化进行自动优化, 从而保持网络性 能最优, 同时节约大量的人力物力。
在 LTE系统中, 小区能力会有所差别, 比如小区是否支持多媒体广播和 组播业务 MBMS ( Multimedia Broadcast/Multicast Service ) , 为了更好的提供 MBMS业务的服务, 邻接小区之间有必要知道对方的 MBMS能力。 而当邻 接小区不归属于同一个 eNB时, 如何获知邻接小区的小区能力是一个需要解 决的问题。 发明内容
本发明所要解决的技术问题是, 提供一种基于长期演进 LTE系统的小区 能力信息通知方法, 使得邻近基站之间可以获知对方所管辖的服务小区的小 区能力信息。
为了解决上述问题, 本发明公开了一种基于长期演进系统的小区能力信 息通知方法, 基于邻近的第一基站和第二基站之间建立有传输层链路, 该方 法包括:
所述第一基站向所述第二基站发送 X2接口消息,所述 X2接口消息中携 带有所述第一基站所管辖的服务小区的服务小区信息, 其中, 各服务小区的 服务小区信息中包含该小区的小区能力信息;
所述第二基站接收到所述 X2接口消息后,保存所述 X2接口消息中的服 务小区信息。
进一步地, 上述方法中, 所述 X2接口消息为 X2接口建立请求消息、 X2 建立响应消息或者配置更新消息。
其中, 所述 X2接口消息为 X2接口建立请求消息或者 X2建立响应消息 时, 所述第一基站在所述 X2接口消息中携带其管辖的所有服务小区的服务 小区信息。
所述小区能力信息至少包括小区是否支持多媒体广播和组播业务 MBMS 的信息。
在所述 X2接口消息中新增信元用于携带所述小区能力信息。
所述第一基站与第二基站中的任一个在向对方基站发送本基站管辖的服 务小区的服务小区信息时, 还将所述服务小区的邻接小区的小区能力信息发 送给对方基站。
本发明技术方案使得邻近基站之间可以获知对方所管辖的服务小区的小 区能力信息。 附图概述
图 1是服务小区信息( Served Cell Information )中增加的表示小区能力信 息的信元结构图;
图 2是具体实施例 1流程示意图;
图 3是具体实施例 2流程示意图。 本发明的较佳实施方式
本发明的主要构思是, 在 LTE系统中, 邻近 eNB之间可以在进行 X2接 口建立的过程中, 或者在 X2接口建立完成后 eNB配置更新的过程中, eNB 可以将其下所有小区的小区能力信息通知给部近 eNB。
下面结合附图及实施例对本发明技术方案作进一步详细说明。
实施例 1
本实施例以基站 A和基站 B为例, 说明这两个基站之间传输小区能力信 息的过程, 其中, 基站 A仅管辖小区 a, 基站 B仅管辖小区 b, 具体过程如 图 2所示, 包括以下步骤:
201 : 当基站 A和基站 B之间要建立 X2接口时, 基站 A向基站 B发送 X2接口建立请求消息, 该消息中携带小区 a 的服务小区信息 (Served Cell Information ) , 其中, 服务小区信息中包含小区 a的小区能力信息, 例如, 小 区 a是否支持 MBMS的能力;
在其它实施例中, 基站 A还可以在 X2接口建立请求消息中携带小区 a 的所有相邻小区的小区能力信息, 具体实现过程中, 基站 A读取小区 a下所 保存的邻接小区信息, 并将信息中所记录的与小区 a相邻的所有小区的小区 能力信息以及小区 a的小区能力信息一起发送给基站 B;
其中, 各小区的邻接小区信息至少包括与本小区相邻的小区的标识以及 与本小区相邻的小区的小区能力信息;
在其它实施例中, 当基站 A管辖若干服务小区时, 基站 A将在 X2接口 建立请求消息中携带其所管辖的所有服务小区的小区能力信息。
202: 基站 B收到上述 X2建立请求消息后, 若处理成功, 即成功建立 X2接口, 则保存 X2建立请求消息中的小区 a的小区能力信息, 并向基站 A 返回 X2建立响应消息,该响应消息中携带小区 b的服务小区信息,服务小区 信息中包含小区 b的小区能力信息, 例如, 小区 b是否支持 MBMS的能力; 若处理失败, 即基站 B与基站 A建立 X2接口失败, 则基站 B向基站 A返回 X2建立失败消息;
在其它实施例中, 当 X2 建立请求消息中包含多个小区的服务小区能信 息时, 基站 B将这多个小区的服务小区信息全部保存; 当 X2建立请求消息 中还包含有与小区 a相邻的所有小区的服务小区信息时, 基站 B可以将小区 a相邻的所有小区的服务小区信息全部保存,也可以只更新保存本地已保存过 的小区的服务小区信息。
同样地, 在其它实施例中, 基站 B还可以在 X2建立响应消息中携带小 区 b的所有邻接小区的小区能力信息, 具体实现过程中, 基站 B读取小区 b 下所保存的邻接小区信息, 并将该信息中所记录的与小区 b相邻的所有小区 的小区能力信息以及小区 b的小区能力信息一起发送给基站 A;
在其它实施例中, 若基站 B管辖若干个小区时, 则基站 B在 X2建立响 应消息中携带其所管辖的所有小区的小区能力信息。
上述流程中,基站通过在 X2接口建立请求消息或者 X2建立响应消息中 新增信元来携带所述小区能力信息, 具体新增信元可以釆用枚举方式表示小 区能力信息, 如图 1所示。
实施例 2
当实施例 1 中的基站 A与基站 B已经建立 X2接口,且基站 B下的小区 b的邻接小区信息中已经保存了小区 a支持 MBMS业务的信息, 此时, 若基 站 A本地配置发生变化, 即小区 a的小区能力信息发生变化时, 比如从支持 变为不支持 MBMS业务时, 基站 A与基站 B之间更新邻接小区能力信息的 过程, 如图 3所示, 包括以下步骤:
301 : 基站 A向基站 B发送 eNB配置更新消息, 并在该 eNB配置更新消 息中携带小区 a的服务小区信息,该服务小区信息中包含小区 a不支持 MBMS 的信息;
302: 基站 B收到基站 A发送的 eNB配置更新消息后, 若处理成功, 则 在小区 b 的邻接小区信息中将其邻接小区 a 的小区能力信息更新为不支持 MBMS业务, 向基站 A返回 eNB配置信息更新确认消息, 若处理失败, 即 基站 B处理 eNB配置更新失败,则基站 B向基站 A返回 eNB配置更新失败。 在其它实施例中, 触发配置更新的情况还包括新增小区、 删除小区、 或 者基站管辖下的小区发生修改等, 其中, 小区发生修改指发生以下情况中的 任一种或几种: 小区的标志符、 小区类型、 小区频点、 上下行传输带宽发生 变化, TDD小区包含子帧分配等等和小区特性相关的属性发生变化; 其中, 当更新的情况为新增小区或者小区属性发生变化时, 配置更新消息中仅携带 发生了配置更新的小区的服务小区信息即可; 当删除小区的时候, 配置更新 消息中携带被删除的服务小区的 ID信息。
在其它实施例中, 当基站 A下小区 a的任意一个相邻小区的配置发生变 化时, 优选的是相邻小区的小区能力信息发生变化时, 也会触发上述配置更 新的过程。
上述流程中, 基站通过在配置更新消息中新增信元来携带所述小区能力 信息, 具体新增信元可以釆用枚举方式表示小区能力信息, 如图 1所示。
工业实用性
从上述实施可以看出, 本发明技术方案使得邻近基站之间可以获知对方 所管辖的服务小区的小区能力, 这样, 当任一基站所管辖的小区内的终端需 要切换到优选目标小区, 或者本小区需要进行负荷均衡或者过载控制而为终 端选择目标小区时, 只要根据本小区下的邻接小区信息中与本小区邻接的各 小区的小区能力信息即可作出正确判断。

Claims

权 利 要 求 书
1、 一种基于长期演进系统的小区能力信息通知方法,基于邻近的第一基 站和第二基站之间建立有传输层链路, 其特征在于, 该方法包括: 所述第一基站向所述第二基站发送 X2接口消息,所述 X2接口消息中携 带有所述第一基站所管辖的服务小区的服务小区信息, 其中, 各服务小区的 服务小区信息中包含该小区的小区能力信息;
所述第二基站接收到所述 X2接口消息后,保存所述 X2接口消息中的服 务小区信息。
2、 如权利要求 1所述的方法, 其特征在于,
所述 X2接口消息为 X2接口建立请求消息、 X2建立响应消息或者配置 更新消息。
3、 如权利要求 2所述的方法, 其特征在于,
所述 X2接口消息为 X2接口建立请求消息或者 X2建立响应消息时, 所 述第一基站在所述 X2接口消息中携带其管辖的所有服务小区的服务小区信 息。
4、 如权利要求 1、 2或 3所述的方法, 其特征在于,
所述小区能力信息至少包括小区是否支持多媒体广播和组播业务 MBMS 的信息。
5、 如权利要求 1、 2或 3所述的方法, 其特征在于,
在所述 X2接口消息中新增信元用于携带所述小区能力信息。
6、 如权利要求 1、 2或 3所述的方法, 其特征在于,
所述第一基站与第二基站中的任一个在向对方基站发送本基站管辖的服 务小区的服务小区信息时, 还将所述服务小区的邻接小区的小区能力信息发 送给对方基站。
PCT/CN2009/070111 2009-01-12 2009-01-12 一种基于长期演进系统的小区能力信息通知方法 WO2010078728A1 (zh)

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