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WO2003037011A1 - Procede pour realiser une communication directement entre stations de base - Google Patents

Procede pour realiser une communication directement entre stations de base Download PDF

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Publication number
WO2003037011A1
WO2003037011A1 PCT/CN2002/000156 CN0200156W WO03037011A1 WO 2003037011 A1 WO2003037011 A1 WO 2003037011A1 CN 0200156 W CN0200156 W CN 0200156W WO 03037011 A1 WO03037011 A1 WO 03037011A1
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WO
WIPO (PCT)
Prior art keywords
protocol
base stations
link
base station
interface
Prior art date
Application number
PCT/CN2002/000156
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English (en)
French (fr)
Inventor
Ping Zhang
Zhiming Li
Honghua Yan
Original Assignee
Huawei Technologies Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2003037011A1 publication Critical patent/WO2003037011A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W92/00Interfaces specially adapted for wireless communication networks
    • H04W92/04Interfaces between hierarchically different network devices
    • H04W92/12Interfaces between hierarchically different network devices between access points and access point controllers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W80/00Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/04Network layer protocols, e.g. mobile IP [Internet Protocol]

Definitions

  • the present invention relates to a transmission technology of a wireless communication network, and specifically proposes a method for directly communicating data and signaling between base stations of a wireless communication system.
  • the interface between the radio network controller (RNC) and SGSN / MSC is an Iu interface
  • the interface control protocol is RNAP (radio network application part)
  • the interface between RNC and RNC Is the RNC interface (Iur) interface in UTRAN, and the interface control protocol is the Radio Network Subsystem Application Part (RNSAP)
  • the interface between the RNC and the base station (NodeB) is the base station interface (Iub interface) in UTRAN, the interface control protocol It is the base station application part (NBAP) of the WCDMA system
  • the air interface of the user equipment (UE) and the UTRAN network is the Uu interface
  • the transmission channels of the signaling and data flow according to the above interface are: : MSC / SGSN——Serving RNC
  • RNC and NodeB are directly connected to the edge router respectively.
  • the data stream on the Iub interface is identified by "User Datagram Protocol (UDP) port number + IP address".
  • UDP User Datagram Protocol
  • the transmission between the RNC and the NodeB changes from the original hierarchical relationship to an equivalent entity, and free communication can be achieved between the NodeB and between the NodeB and the RC.
  • Most of the current transmission control functions in the UTRAN system are performed by the RC.
  • An RNC needs to manage multiple NodeBs. Not only is the signaling and data processing delays caused by the heavy load, but the Iub interface also causes signaling and data processing.
  • An object of the present invention is to provide a method for implementing direct communication of data and signaling between base stations.
  • the method can significantly reduce the data processing load of RC, eliminate the impact of Iub / Iur interface delay, and thereby improve the efficiency of a wireless communication system. .
  • the method for implementing direct communication between base stations includes: (1) establishing a logical interface (IuNB) for inter-base station interconnection, which supports signaling negotiation on radio resources required for a communication link between base stations (NodeB), and supports data frame communication between base stations;
  • IuNB logical interface
  • NodeB base stations
  • the method further includes creating a protocol stack for the IuNB interface control plane and user plane.
  • the control plane protocol stack includes 6 layers. The first layer uses the physical layer (L1) protocol, the second layer uses the data link layer (L2) protocol, the third layer uses the Internet protocol (IP protocol), and the fourth layer uses Stream control transmission protocol (SCTP protocol), the fifth layer uses the signaling user adaptation protocol (SUA protocol), and the sixth layer uses the base station to base station application part (BBAP) protocol.
  • the fifth layer of the above control plane protocol stack includes two sublayers.
  • the first sublayer uses the MTP3 user adaptation layer (M3UA, MTP3: third layer of the message transmission part) protocol, and the second sublayer uses the signaling connection control part (SCCP). )protocol.
  • M3UA MTP3 user adaptation layer
  • MTP3 third layer of the message transmission part
  • SCCP signaling connection control part
  • the user plane protocol stack includes five layers, the first layer uses the L1 protocol, the second layer uses the L2 protocol, the third layer uses the IP protocol, the fourth layer uses the User Datagram Protocol (UDP) protocol, and the fifth layer uses IuNB frame protocol.
  • the first layer uses the L1 protocol
  • the second layer uses the L2 protocol
  • the third layer uses the IP protocol
  • the fourth layer uses the User Datagram Protocol (UDP) protocol
  • the fifth layer uses IuNB frame protocol.
  • the present invention defines an IuNB interface for direct communication between base stations, and also defines its control plane and user plane protocol stacks, it provides a more convenient channel for information transmission between base stations, and enables base stations to communicate between base stations. Establish a direct communication link This method can significantly reduce the data processing load of the RNC, eliminate the impact of the Iub / Iur interface delay, and improve the efficiency of the wireless communication system.
  • the control plane signaling carried by the luNB interface will play an important role in promoting the evolution of UTRA structure and functions in order to increase the amount of control information for NodeB.
  • Figure 1 is a structural diagram of a distributed UTRAN system
  • FIG. 2 is a location diagram of the interface according to the present invention in a UTRAN system
  • FIG. 3 is a flowchart of an embodiment of a method according to the present invention.
  • FIG. 6 is a process diagram of distributed link management implemented in the FCS process of HSDPA by applying the present invention.
  • Step 1 Establish a logical interface luNB for interconnection between base stations, which should follow the following principles: first, the interface should be an open interface; second, the interface should support signaling and data transmission between the two base stations; third, the interface should It is a point-to-point logical connection interface between two base stations, regardless of the specific physical connection.
  • the logical interface Iu B interconnected between base stations has the following characteristics: 1) Supports signaling negotiation of radio resources required for communication links between NodeBs. 2) Supports data frame communication between base stations.
  • the data frame formats (including HS-DSCH) currently supported by the NodeB are supported by the IuNB interface data frames.
  • the IuNB interface established in accordance with the above principles and features has the following functions: it can support signaling and data transmission between two base stations, can complete the management of the transmission network, the service management of the transmission channel, and the management of the IuNB interface resources;
  • the control plane protocol stack in this embodiment includes 6 layers.
  • the first layer uses the L1 protocol
  • the second layer uses the L2 protocol
  • the third layer uses the IP protocol
  • the fourth layer uses the SCTP protocol
  • the fifth layer uses the SUA protocol.
  • ⁇ Layer 6 uses the BBAP protocol.
  • the fifth layer of the control plane protocol stack may also adopt a structure including two sublayers.
  • the first sublayer uses the M3UA (MTP3 User Adaptation Layer, MTP3: Information Transfer Part 3) protocol.
  • MTP3 MTP3 User Adaptation Layer
  • SCCP Signaling Connection Control Part
  • the user plane protocol stack includes five layers, the first layer uses the L1 protocol, the second layer uses the L2 protocol, the third layer uses the IP protocol, the fourth layer uses the UDP protocol, and the fifth layer uses the IuNB protocol.
  • the above BBAP is a wireless network layer protocol of IuNB on the control plane. It can be extended based on the existing NBAP protocol, and some optional IEs (information elements) supporting IuNB transmission can be added.
  • the control plane wireless transport layer protocol uses SCTP streams to distinguish it, which is consistent with the existing BAP signaling transmission.
  • Step 2 Use the interface provided in the above step 1 to establish a logical link between the two base stations, and use the logical link control to complete the signaling and data transmission between the two base stations, and the management and transmission of the transmission network. Channel service management and management functions of the IuNB interface resources.
  • Step 3 After completing the functions described in step 2 above, release the logical link between the base stations. Refer to Figure 5 for the process of establishing and releasing IuNB links in steps 2 and 3 above.
  • establishing a logical link between two base stations can be implemented by the following steps: Refer to FIG. 5.
  • the base station 1 When the base station 1 needs to establish an IuNB link with the base station 2, first the base station 1 sends a request to establish a logical link (InterNodeB Connection Request) to the base station 2; then the base station 2 sends a response to establish a link to the base station 1 according to the above request. (InterNodeB Connection Setup); Finally, after receiving the response, the base station 1 allocates link resources, and sends a message (InterNodeB Connection Setup Complete) to the base station 2 to complete the establishment of the IuNB link between the two base stations.
  • InterNodeB Connection Request a request to establish a logical link
  • the base station 2 sends a response to establish a link to the base station 1 according to the above request.
  • the base station 1 allocates link resources, and sends a message (InterNodeB Connection Setup Complete) to the base station 2 to complete the establishment of the IuNB link between the two base stations.
  • the release of the logical link between the two base stations can be achieved by the following steps: When the link between the two base stations needs to be released, first the base station 1 sends a message requesting the release of the link to the base station 2 (InterNodeB Connection Release); then 2 The base station releases the resources related to the link according to the message, and sends a link release complete message (InterNodeB Connection Release Complete) to the base station 1. Finally, after receiving the message that the link is released, the base station 1 releases itself IuNB link resources, thereby completing the release of the logical link between the base stations.
  • the RNC radio network controller
  • the RNC radio network controller
  • the RNC radio network controller
  • the new cell through the control of the IuNB interface to all cells in the active set for the signaling broadcast including the IP address of the base station to which the new cell belongs and the cell ID number (InterNodeB Connection request)
  • the base station to which the primary cell belongs establishes a link connection signaling (InterNodeB Connection setup) via the control plane of the IuNB interface to instruct the base station to which the new cell belongs to allocate necessary link resources.
  • the base station to which the new cell belongs allocates the allocated link resources, that is, the data ports, to the base station to which the primary cell belongs by using the signaling of the IuNB control plane link completion (2) (InterNodeB Connection setup complete).
  • the IuNB data link is established.
  • the base station to which the new cell belongs After the base station to which the new cell belongs establishes the IuNB link, it reports to the R C that the radio link establishment is complete.
  • the RNC then informs the UE (user equipment) to update the current active set stored on the UE side.
  • the base station to which the primary cell belongs After establishing the IuNB link, the base station to which the primary cell belongs sends the updated "Active Set Routing Table Synchronization" message to the base stations to which all slave cells belong via the established IuNB data link, and then the base station to which the slave cell belongs controls the slave cell. Updates to the active set routing table. This process and subsequent cell synchronization information sent from the primary cell to the secondary cell belong to the content of "IuNB interface data transmission" in (3) in the figure.
  • the resources related to the current cell in the cell are released.
  • Source It further judges whether it is the last cell in the NodeB to which it belongs in the current active set according to the active set, and if so, it also notifies the NodeB to release the resources related to the IuNB data link.
  • the RNC first informs the UE to update the active set, and notifies the exiting cell to remove the link between the Iub (base station interface in UTRAN) and the IuNB interface.
  • the RNC notifies the UE to update the activation set.
  • the RNC sends a request to release the radio link to the exiting cell, and the exiting cell uses the IuNB control plane link release signaling 4 (InterNodeB Connection release) to notify the activation set. All cells in the network release link resources related to themselves. After all cells return to the exiting cell through IuNB control, a confirmation message of link release completion (InterNodeB Connection release complete) is returned, and the exiting cell releases resources related to the active set in the cell, and then notifies the RNC that the link is removed.

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

Description

一种实现基站间直接通信的方法 技术领域
本发明涉及无线通信网络的传输技术,具体地说提出了一种涉及 到无线通信系统基站间实现数据和信令直接通信的方法。
背景技术
在通用陆地无线接入网 (UTRAN ) 系统中, 不同节点的实体之 间由于要完成的功能和处理的数据的不同,所以采用不同的应用不同 协议的接口。 例如, 无线网络控制器(RNC )与 SGSN/MSC ( GPRS 业务支持节点 /移动交换中心 )之间的接口为 Iu接口,接口控制协议 为 RNAP (无线网络应用部分); RNC与 RNC之间的接口为 UTRAN 中的 RNC接口 (Iur )接口, 接口控制协议为无线网络子系统应用部 分(RNSAP ); RNC与基站(NodeB )之间的接口为 UTRAN 中的基 站间接口 (Iub接口), 接口控制协议为 WCDMA系统基站应用部分 ( NBAP ); 用户设备(UE )和 UTRAN网的空中接口为 Uu接口; 对 于上 /下行链路而言, 信令和数据流的传输通道依据上述接口流动的 实体流为: MSC/SGSN——服务 RNC—— RNC (可选)—— NodeB 在第三代伙伴工程(3GPP) 标准的第 5版本 (R5)阶段,引入 因特 网协议 (IP协议)传输, 各网元都直接挂在 IP 网络的边缘路由器上, 例如: RNC 、 NodeB 分别直接与边缘路由器相联。 Iub接口上数据 流以 "用户数据报协议 ( UDP )端口号 +IP地址" 来标识接口上的数 据流。 在这种结构中, RNC和 NodeB之间传输由原来的层次关系变 为同等实体, NodeB之间和 NodeB与 R C之间的都可以实现自由通 信。 但是目前 UTRAN系统中的传输控制功能绝大部分由 R C完成, 一个 RNC需要管辖多个 NodeB, 不仅由于负荷过重造成信令处理和 数据处理的延迟, 而且 Iub接口也会导致信令和数据处理的延迟, 同 时还存在緩存、公共信道等的资源紧张问题。 为了克月良 RNC集中处 理造成的瓶颈, 需要部分 RNC功能下移至 NodeB中, 以提高系统的 效率, 如 MAC-hs实体的下移。 但是随着 RNC部分功能实体下移到 NodeB,会使 NodeB之间直接通信的需求增加,例如高速下行包接入 ( HSDPA )的快速小区选择( FCS )用分布式的 PDU队列代替 RNC 中的集中式 PDU队列, 在 NodeB之间会频繁传递 PDU队列的同步 信息。可见,随着 RNC功能逐渐向 NodeB的转移,促使 RNC与 NodeB 之间控制关系也在消减, UTRAN实体之间的过程控制由集中式管理 逐渐转向分布式管理, 如果目前 NodeB之间的信息交换还是由 RNC 来完成, 不仅传输路径变长, 而且依然受到 Iub/Iur接口的延时制约, 必将导致系统效率的下降。
发明内容
本发明的目的在于提供一种实现基站间进行数据和信令的直接 通信的方法, 使用该方法能够明显减轻 R C的数据处理负担, 消除 Iub/Iur接口延迟的影响, 进而提高无线通信系统的效率。
为达到上述目的, 本发明提供的实现基站间直接通信的方法, 包 括 ·· ( 1 )建立用于基站间互连的逻辑接口 (IuNB ), 该接口支持对 基站 ( NodeB )间通信链路所需的无线资源进行信令协商, 以及支持 基站间的数据帧通信;
( 2 )建立两个基站之间的逻辑链路, 完成两个基站之间的信令 和数据传输, 以及完成基站之间的传输网络的管理与维护、传输信道 的业务管理以及接口资源的管理;
( 3 )当完成上述步骤(2 )所述功能后,释放基站间的 辑链路。 所述方法还包括,创建所述 IuNB接口控制面和用户面的协议栈。 所述控制面协议栈包括 6个层次, 第一层采用物理层 (L1 )协议, 第二层采用数据链路层(L2 )协议, 第三层采用因特网协议 ( IP协 议), 笫四层采用流控制传输协议(SCTP协议), 第五层采用信令用 户适配协议( SUA协议),第六层采用基站到基站间应用部分 ( BBAP ) 协议。
上述控制面协议栈第五层包括两个子层, 第一个子层采用 MTP3 用户适配层(M3UA, MTP3: 消息传送部分第三层)协议, 第二个 子层采用信令连接控制部分(SCCP )协议。
所述用户面协议栈包括 5个层次, 第一层采用 L1协议, 第二层 采用 L2协议,第三层采用 IP协议,第四层釆用用户数据报协议 ( UDP ) 协议, 第五层采用 IuNB帧协议。
由于, 本发明为基站之间的直接通信定义了一个 IuNB接口, 同 时定义了它的控制面和用户面的协议栈,为基站之间的信息传输提供 了更便捷的通道, 能够使基站之间建立直接通信的链路, 直接完成信 令和数据的交换, 因此该方法能够明显减轻 RNC的数据处理负担, 消除 Iub/Iur接口延迟的影响, 进而提高无线通信系统的效率。 同时, luNB 接口的控制面信令承载为提高 NodeB 的控制信息量, 推动 UTRA 结构和功能的演化将起到重要作用。
附图说明
图 1是分布化的 UTRAN系统结构图;
图 2是本发明所述接口在 UTRAN系统的位置图;
图 3是本发明所述方法的实施例流程图;
图 4是本发明所述 luNB接口的协议栈;
图 5 是基于本发明的 luNB接口的用户面链路的建立和释放过 程;
图 6是应用本发明在 HSDPA的 FCS过程中实现的分布式链路 管理过程图。
具体实施方式
下面结合附图对本发明作进一步详细的描述。
在 UTRAN系统中, 为减轻 RNC数据处理的负担,推动 RNC的 功能向基站的下移,本发明在 UTRAN内部实体基站与基站之间建立 能够实现基站互连的逻辑接口 luNB, 参考图 2。 本发明依据上述接 口实现基站间直接通信的方法实施例参考图 3。 第 1步, 建立用于基 站间互连的逻辑接口 luNB, 应遵循以下原则: 首先该接口应为开放 接口; 其次该接口应支持两个基站间的信令和数据传输; 第三该接口 应为两个基站间的点对点逻辑连接接口, 与具体的物理连接无关。 基站间互连的逻辑接口 Iu B具有下面的特征: 1 )支持对 NodeB 间通信链路所需的无线资源进行信令协商. 2 )支持基站间的数据帧 通信。 目前 NodeB支持的数据帧格式 (包括 HS-DSCH )都被 IuNB 接口数据帧所支持。
按照上述原则和特征建立的 IuNB接口具有下面的功能: 可以支 持两个基站之间的信令和数据传输,可以完成传输网络的管理、传输 信道的业务管理以及所述 IuNB接口资源的管理;
为完成上述功能, 需要创建所述 IuNB接口控制面和用户面的协 议栈。 参考图 4。 本实施例中的控制面协议栈包括 6个层次, 第一层 采用 L1协议, 第二层采用 L2协议, 第三层采用 IP协议, 第四层采 用 SCTP协议, 第五层采用 SUA协议, 笫六层采用 BBAP协议。
其中所述控制面协议栈第五层除了采用 SUA协议之外, 还可以 采用包括两个子层的结构, 第一个子层采用 M3UA ( MTP3用户适配 层, MTP3: 信息转移部分 3 )协议, 第二个子层采用 SCCP (信令连 接控制部分)协议。
所述用户面协议栈包括 5个层次, 第一层采用 L1协议, 第二层 采用 L2协议, 第三层采用 IP协议, 第四层采用 UDP协议, 第五层 采用 IuNB协议。
上述 BBAP是 IuNB在控制面上的无线网络层协议。 它可以基于 现有 NBAP协议进行扩展,增加一些支持 IuNB传输的可选 IE (信息 元素)即可。 控制面的无线传输层协议采用 SCTP流来区别, 与现有 的 BAP信令传输保持一致。 第 2步, 利用上述第 1步提供的接口, 建立两个基站之间的逻辑 链路, 利用所述逻辑链路控制完成两个基站之间的信令和数据传输, 传输网络的管理、 传输信道的业务管理以及所述 IuNB接口资源的管 理功能。
第 3步,当完成上述第 2步所述功能后,释放基站间的逻辑链路。 上述第 2、 3步建立和释放 IuNB链路的过程参考图 5。
其中,建立两个基站之间的逻辑链路可以通过以下步骤实现:参考 图 5。
当基站 1需要建立与基站 2的 IuNB链路时, 首先基站 1向基站 2发出建立逻辑链路的请求(InterNodeB Connection Request ); 然后 基站 2 才艮据上述请求向基站 1 发出建立链路的响应 (InterNodeB Connection Setup ); 最后基站 1收到所述响应后分配链路资源, 并向 基站 2 发送链路建立完毕的消息 (InterNodeB Connection Setup Complete ), 进而完成两个基站间 IuNB链路的建立。
释放两个基站之间的逻辑链路可以通过以下步骤实现: 当两个基站之间的链路需要释放时,首先基站 1向基站 2发送要 求释放链路的消息( InterNodeB Connection Release ); 然后 2基站根 据所述消息释放与该链路有关的资源,并向基站 1发送链路释放完毕 的消息 ( InterNodeB Connection Release Complete ); 最后基站 1在收 到所述链路释放完毕的消息后, 释放自身的 IuNB链路资源, 从而完 成基站间逻辑链路释放。
下面通过采用本发明提供的 IuNB接口, 进行 HSDPA FCS (高速 下行包接入中的快速小区选择 )的分布式链路管理过程的实施例对本 发明做进一步说明。 参考图 6。
在图 6所述的基于 Iu B的 HSDPA FCS过程中, 当新小区加入 激活集时, RNC (无线网络控制器)向新小区所属基站发出包括激活 集内所有小区所属基站的 IP地址和小区 ID (标识)号的无线链路建 立清求 ( Radio Link setup request ), 新小区通过 IuNB接口的控制面 向激活集内所有小区进行包括新小区所属基站的 IP地址和小区 ID号 的信令广播 ( InterNodeB Connection request ), 主小区所属基站通过 IuNB接口的控制面的建立链路连接的信令① ( InterNodeB Connection setup )指示新小区所属基站分配必要的链路资源。新小区所属基站将 分配好的链路资源, 即数据端口, 用 IuNB的控制面链路建立完成的 信令②( InterNodeB Connection setup complete )发送给主小区所属基 站, 此时, 主、 从基站之间的 IuNB数据链路建立完毕。
新小区所属基站在建立了 IuNB链路后, 向 R C报告无线链路 建立完成。 RNC继而通知 UE (用户设备)更新 UE侧保存的当前激 活集。
主小区所属基站在建立 IuNB链路后, 将已更新的 "激活集路由 表同步" 消息发送通过已建立的 IuNB数据链路传给所有从小区所属 基站, 然后由从小区所属基站控制从小区完成激活集路由表的更新。 这个过程与后续的主小区向从小区发送小区同步信息都属于图中③ 的 "IuNB接口数据传输" 的内容。
当一个小区退出激活集时, 释放本小区与当前激活集相关的资 源。 它进而根据激活集判断自己是否是所属 NodeB 中最后一个在当 前激活集中的小区,如果是, 则还要通知 NodeB释放 IuNB数据链路 相关的资源。
RNC首先通知 UE更新激活集,并通知退出小区拆除 Iub( UTRAN 中的基站接口)和 IuNB接口的链路。
首先 RNC通知 UE更新激活集, 当 UE更新激活集完毕时, RNC向 退出小区发出释放无线链路的请求, 退出小区用 IuNB的控制面链接 释放的信令④( InterNodeB Connection release )通知激活集内的所有 小区释放与自己相关的链路资源。 所有小区通过 IuNB控制面向退出 小区返回一个链路释放完毕的确认信息⑤ (InterNodeB Connection release complete )后,退出小区释放本小区内与该激活集相关的资源, 然后通知 RNC链路拆除完毕。

Claims

权 利 要 求
1、 一种实现基站间直接通信的方法, 包括:
( 1)建立用于基站间互连的逻辑接口 (Iu B), 该接口支持对 基站(NodeB)间通信链路所需的无线资源进行信令协商, 以及支持 基站间的数据帧通信;
(2)建立两个基站之间的逻辑链路, 完成两个基站之间的信令 和数据传输, 以及完成基站之间的传输网络的管理与维护、传输信道 的业务管理以及接口资源的管理;
(3)当完成上述步骤(2)所述功能后, 站间的逻辑链路。 2、 根据权利要求 1所述的实现基站间直接通信的方法, 其特征 在于: 所述方法还包括, 创建所述 IuNB接口控制面和用户面的协议 栈。
3、 ^^据权利要求 1所述的实现基站间直接通信的方法, 其特征 在于: 所述控制面协议栈包括 6个层次, 第一层采用物理层 (L1)协 议, 第二层采用数据链路层(L2)协议, 第三层采用因特网协议(IP 协议), 第四层采用流控制传输协议(SCTP协议), 第五层采用信令 用户适配协议 (SUA协议), 第六层采用基站到基站间应用部分 (BBAP)协议。
4、 居权利要求 3所述的实现基站间直接通信的方法, 其特征 在于:所述控制面协议栈第五层包括两个子层,第一个子层采用 MTP3 用户适配层 (M3UA, MTP3: 消息传送部分第三层)协议, 第二个 子层采用信令连接控制部分(SCCP)协议。 5、 居权利要求 1 所述的实现基站间直接通信的方法, 其特征 在于: 所述用户面协议栈包括 5个层次, 第一层采用 L1协议, 第二 层采用 L2协议, 第三层采用 IP协议, 第四层采用用户数据报协议 ( UDP )协议, 第五层采用 IuNB帧协议。
6、 根据权利要求 1 所述的实现基站间直接通信的方法, 其特征 在于所述建立两个基站之间的逻辑链路进一步包括以下步骤:
( 61 )基站 1向基站 2发出建立逻辑链路的请求;
( 62 )基站 2根据上述请求向基站 1发出建立链路的响应;
( 63 ) 1 基站收到所述响应后分配链路资源, 在成功分配链路资 源后, 向基站 2发送链路建立完毕的消息,进而完成两基站间逻辑链 路的建立; 若链路资源分配失败,向基站 2发送链路建立失败的消息, 消息中包括相应的失败原因。
7、 居权利要求 1 所述的实现基站间直接通信的方法, 其特征 在于所述释放两个基站之间的逻辑链路进一步包括以下步骤:
( 71 )基站 1向基站 2发送要求释放链路的消息;
( 72 )基站 2根据所述消息释放与该链路有关的资源, 并向基站 1发送链路释放完毕的消息;
( 73 )基站 1收到所述链路释放完毕的消息后, 释放自身的链路 资源资源, 从而完成基站间逻辑链路释放。
PCT/CN2002/000156 2001-10-24 2002-03-13 Procede pour realiser une communication directement entre stations de base WO2003037011A1 (fr)

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