WO2010017777A1 - 一种维护无线承载的方法、装置及系统 - Google Patents

一种维护无线承载的方法、装置及系统 Download PDF

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Publication number
WO2010017777A1
WO2010017777A1 PCT/CN2009/073241 CN2009073241W WO2010017777A1 WO 2010017777 A1 WO2010017777 A1 WO 2010017777A1 CN 2009073241 W CN2009073241 W CN 2009073241W WO 2010017777 A1 WO2010017777 A1 WO 2010017777A1
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Prior art keywords
bearer
core network
network side
information
radio
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PCT/CN2009/073241
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English (en)
French (fr)
Inventor
陈芳
支春霞
陈卓
周进怡
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华为技术有限公司
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Publication of WO2010017777A1 publication Critical patent/WO2010017777A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/30Connection release
    • H04W76/34Selective release of ongoing connections

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method, device, and system for maintaining a radio bearer.
  • LTE System Architecture Evolution Network
  • PS Packet Switched domain services
  • IP bearer An established LTE/SAE network architecture is shown in Figure 1:
  • MME Mobility Management Entity Mobility Management Entity
  • Mobility management context of the terminal user or user equipment, such as user identification, mobility management status, location information, etc., and NAS (Non Access Stratum)
  • Non-access layer Non-access layer signaling processing, responsible for NAS signaling security, etc.
  • System Architecture Evolution Network Gateway includes two parts S-GW (Serving Gateway)
  • P-GW Packet Gateway
  • the S-GW and the P-GW are two logical entities and may exist on the same or different physical entities.
  • the S-GW saves the user plane context of the UE, such as the IP address and routing information of the UE, and performs lawful interception, packet data routing, and the like.
  • the interface between the S-GW and the MME is S1, which is responsible for communication between the MME and the S-GW, and performs interaction between the mobility management information of the UE and the session control information.
  • the MME passes through the S 1 -MME, and the S-GW is responsible for the connection between the control plane and the user plane through the S 1 -U and the E-UTRAN network, respectively.
  • the peer MME passes the S3 interface, and the S-GW communicates with the 2G/3G through the S4 interface.
  • the SGSN (Serving GPRS Support Node) is responsible for the mobile control plane anchor and user plane anchor functions between the 2G/3G and SAE networks.
  • the P-GW is responsible for the user plane anchor function of the UE accessing the packet data network, communicates with the external packet data network through the SGi reference point, has the function of packet routing and forwarding, and is responsible for the policy charging enhancement function, based on each user. Group filtering function, etc.
  • the P-GW is connected to the S-GW through the S5 interface, and transmits control information such as load establishment/modification/deletion, and packet data routing.
  • Service GPRS support node As a basic component network element, its main role is to serve the MS (Mobile Station) of the SGSN service area.
  • the functions provided by the SGSN include: routing and forwarding functions of packet data packets in the SGSN area, providing services for all PS users in the SGSN area; encryption and authentication functions; session management functions; mobility management functions; Mobility control plane anchor and user plane anchor functions between 2G/3G and SAE networks.
  • the interface between the SGSN and the MME is S3, and the interface between the SGSN and the S-GW is S4.
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • the evolved global terrestrial radio access network is an evolved network radio access network, which is composed of an eNodeB (Evolved NodeB evolved base station), and eNodeBs can be interconnected through an X2 interface.
  • eNodeB evolved NodeB evolved base station
  • the policy charging rule function transmits QoS and charging policy control information to the P-GW through the S7 interface.
  • the connected UE enters another eNodeB from one eNodeB (Source eNodeB) control area (target eNodeB: Target)
  • the control area of the eNodeB requires control signaling of the X2 interface and switching of the transmission data.
  • the switching process of the X2 interface is divided into three parts: the handover preparation phase, the handover execution phase, and the handover completion phase.
  • Switch The preparation phase mainly completes the resource reservation process on the target eNodeB.
  • the handover execution phase completes the air interface handover process, including the synchronization of the UE to the target cell, and the target cell allocates an access channel to the UE.
  • the handover completion phase mainly performs the core network.
  • the handover process of the bearer includes the establishment of the uplink and downlink bearers on the target eNodeB to the S-GW and the update process of the bearer information initiated by the S-GW to the P-GW.
  • the reason for the failure of the corresponding bearer establishment on the core network side may include: the MME determines whether the bearer of the core network needs to be established according to the limitation of the subscription data of the user, that is, there may be a core network requested by the target eNo deB because of certain subscription restrictions. If the S-GW that is served by the UE is changed, the bearer establishment in the MME may not cause the core network bearer to be established because the resources on the target S-GW are insufficient.
  • the embodiment of the invention provides a method, a device and a system for maintaining a radio bearer, so that air interface resources are effectively saved during network handover.
  • the method for maintaining a radio bearer includes: receiving a core network side bearer setup state information sent by a core network node or deleting a bearer request; and deleting a radio bearer corresponding to the bearer of the core network side establishment failure.
  • the embodiment of the present invention further provides a method for maintaining a radio bearer, including:
  • the core network node notifies the bearer establishment status information of the core network side of the wireless network node
  • the wireless network node is configured to process the radio bearer corresponding to the bearer that fails to be established on the core network side according to the bearer setup state information of the core network side provided by the core network node.
  • An embodiment of the present invention further provides an apparatus, including:
  • [24] information acquisition unit used to acquire bearer establishment status information on the core network side;
  • the bearer deleting unit is configured to: delete, according to the bearer setup state information acquired by the information acquiring unit, the radio bearer corresponding to the bearer that fails to be established on the core network side.
  • the embodiment of the present invention further provides a communication system, which specifically includes: a wireless network side and can communicate with the same The core network side of the message, where: the wireless network side is configured to initiate a network handover process, and according to the received bearer deletion request or bearer setup state information sent by the core network side, delete the radio bearer corresponding to the bearer that fails to be established on the core network side;
  • the core network side is configured to acquire the bearer setup state information in the core network handover process after the handover process is initiated on the wireless network side, and send the bearer deletion request or the bearer setup state information to the wireless network side according to the bearer setup state information.
  • FIG. 1 is a simplified diagram of the LTE/SAE network architecture
  • FIG. 3 is a flowchart of a method for maintaining a radio bearer according to Embodiment 1 of the present invention
  • FIG. 5 is a flowchart of a method for maintaining a radio bearer according to Embodiment 3 of the present invention.
  • FIG. 6 is a flowchart of a method for maintaining a radio bearer according to Embodiment 4 of the present invention.
  • FIG. 7 is a schematic diagram of a device according to Embodiment 5 of the present invention.
  • Figure 8 is a schematic diagram of a communication system in accordance with an embodiment of the present invention.
  • the embodiment of the present invention provides a method for maintaining a radio bearer, and the overall technical solution flow is shown in FIG. 2 .
  • the target wireless network node such as the target eNodeB, initiates a core network handover request to the core network node, and the core network node Create a host, then perform the following steps:
  • the core network node acquires bearer establishment status information according to the bearer establishment status of the core network side.
  • the core network node performs batch processing on the bearer established by the wireless network request, that is, after receiving the handover request, the core network node starts a timer for controlling the core network node to monitor the core network side bearer establishment.
  • the meter can be set based on the number of messages that need to be received or based on the message type. The squad should ensure that under normal circumstances, the core network node is able to receive all successfully established bearer responses.
  • the core network node After the timer arrives, the core network node generates a core network side bearer setup state information list according to the bearer setup situation, and the list may be a list of successfully established bearers, or may be a list of bearers that fail to be established. . Before the timer arrives, the bearers that have not been established on the core network side are regarded as bearer establishment failures, and are included in the list of bearers that failed to be established.
  • step 202 the core network node notifies the bearer establishment status information of the core network side of the radio network node.
  • This information can be in the form of a batch, such as carrying a list of successful bearers or a list of failed bearers in a message.
  • the information may be carried in a handover response message returned by the core network node to the wireless network node, or may be carried by other messages sent by the core network node to the wireless network node.
  • This information can also be a non-batch case.
  • the core network node For each bearer, the core network node sends a notification message of the bearer setup status.
  • the message may be a message that a single bearer is successfully established or a single bearer fails to be established.
  • the core network node requests the wireless network node to delete the radio bearer corresponding to the bearer that fails to establish the core network according to a single bearer setup situation.
  • the radio network node processes the radio bearer corresponding to the bearer that fails to be established on the core network side according to the bearer setup status information or bearer deletion request provided by the core network node.
  • the processing includes: immediately deleting the part of the bearer that is successfully established on the wireless network node but fails to be established on the core network side; or, temporarily storing the part of the bearer that fails to be established on the core network side to bear the corresponding radio bearer. After that, the switch request is re-initiated to the core network node, so that the core network node establishes the corresponding bearer again. If the host cannot be successfully established, the corresponding bearer is deleted.
  • FIG. 3 is a flowchart of a method for maintaining a radio bearer according to Embodiment 1 of the present invention, which is applicable to a situation in which a bearer of a core network side fails to be established due to insufficient resources on a target S-GW, and specifically includes: [50] Step 301, the UE from the source eNode
  • the target eNodeB informs the MME through the path switch request message: The cell has been changed and carries a list of radio resources that failed to establish an air interface in the message.
  • the MME reselects the S-G W that it serves for the UE, that is, the target S-GW.
  • Step 302 The MME starts the meter I.
  • the meter I is used to set a predetermined length, which is the length of the core network node monitoring the core network side load establishment state.
  • the predetermined length can be based on settings, the number of messages waiting to be received based on the need, or based on the message type.
  • the principles of the predetermined length setting include: Ensure that under normal circumstances, the core network node can receive all successfully established bearer responses.
  • Step 303 The MME initiates a bearer setup request to the target S-GW by using the received path switch request information.
  • Step 304 The target S-GW sends a bearer response to the MME.
  • the MME After receiving the message, the MME starts a meter II for monitoring the release of resources on the core network side.
  • Step 305 After the timer I is over, the MME generates a list of successfully established bearers or a list of failed bearers according to the bearer establishment status of the core network side. In this case, if the bearer setup response initiated by step 303 and the bearer setup is not received, the bearer setup failure is considered.
  • Step 306 The MME sends the bearer setup state information to the target eNodeB by using the path switch response, or deletes the bearer request.
  • the MME may also send bearer setup status information to the target eNodeB through a single message, or delete the bearer request.
  • the foregoing bearer setup status information includes: establishing a list of successful bearers, or establishing a list of failed bearers.
  • the deleting the bearer request includes: deleting all the requests for the radio bearers corresponding to the core network side bearers that fail to be established.
  • Step 307 The target eNodeB establishes state information or deletes the bearer according to the bearer sent by the MME. Request to process the radio bearer.
  • the processing of the radio bearer by the target eNodeB includes: immediately deleting the radio bearer corresponding to the part of the bearer that fails to be established on the core network side; or temporarily saving the radio bearer corresponding to the part of the core network side that fails to be established, After a period of time, the handover request is re-initiated to the MME, so that the MME requests the target S-GW to establish the corresponding bearer again. If the target eNodeB fails to be established, the target eNodeB deletes the corresponding bearer again; or, after a period of time, try again to the MME. The handover request is initiated. In the case that the multiple-requested bearer setup process fails, the target eNodeB deletes the corresponding bearer.
  • Step 308 The target eNodeB informs the source eNodeB to release the radio resource.
  • Step 309a After the meter II is exceeded, the MME sends a bearer deletion request to the source S-GW, that is, the resource release to the source S-GW is initiated.
  • Step 309b The source S-GW returns a response of the resource release result to the MME.
  • steps 309a, 309b is determined by the timing of the timer II, and there is no necessary sequential relationship between the execution steps of steps 305 and 308.
  • the list of successful bearers is established according to the core network side sent by the MME, or a list of failed bearers is established.
  • the core network side establishes a radio bearer corresponding to the bearer that fails to be deleted, and effectively saves air interface resources.
  • FIG. 4 is a flowchart of a method for maintaining a radio bearer according to Embodiment 2 of the present invention, which is applicable to a situation in which a bearer of a core network side fails to be established due to insufficient resources on the target S-GW, and specifically includes:
  • Step 401 UE from source eNode
  • the target eNodeB informs the MME through the path switch request message: The cell has been changed and carries a list of radio resources that failed to establish an air interface in the message.
  • the MME reselects the S-G W that it serves for the UE, that is, the target S-GW.
  • Step 402 The MME initiates a bearer setup request to the target S-GW by using the received path switch request.
  • Step 403 The target S-GW sends a bearer response to the MME.
  • the MME After receiving the message, the MME starts a timer for monitoring the release of resources on the core network side.
  • Step 404 The MME returns a path switch response to the target eNodeB.
  • Step 405 The MME sends a single bearer status notification message to the target eNodeB according to the bearer setup response received in step 403, where the message may be a single bearer setup success message or a single bearer setup failure message; or A bearer that fails to be established by the side initiates a single bearer deletion request for deleting the bearer of the corresponding wireless network to the target eNodeB, that is, after receiving a response that the core network bearer fails to be established, a single bearer deletion request of the wireless network side is initiated. This step can occur before step 404.
  • Step 406 The target eNodeB processes the radio bearer according to the status notification message or the single bearer deletion request received by the MME.
  • the processing of the radio bearer by the target eNodeB includes: immediately deleting the radio bearer corresponding to the part of the bearer that fails to be established on the core network side; or temporarily storing the radio bearer corresponding to the part of the core network side that fails to be established, After a period of time, the handover request is re-initiated to the MME, so that the MME requests the target S-GW to establish the corresponding bearer again. If the target eNodeB fails to be established, the target eNodeB deletes the corresponding bearer again; or, after a period of time, try again to the MME. The handover request is initiated. In the case that the multiple-requested bearer setup process fails, the target eNodeB deletes the corresponding bearer.
  • Step 407 After receiving the path switch response, the target eNodeB informs the source eNodeB to release the radio resource.
  • Step 408a After the timer started in step 403 is exceeded, the MME sends a bearer deletion request to the source S-GW, that is, the resource release to the source S-GW is initiated.
  • Step 408b The source S-GW returns a response to the resource release result to the MME.
  • the core network side fails to be established according to the status notification message or the single bearer deletion request sent by the MME.
  • the bearer corresponding to the radio bearer is deleted and processed, thereby effectively saving air interface resources.
  • FIG. 5 is a flowchart of a method for maintaining a radio bearer according to Embodiment 3 of the present invention, which is applicable to a situation in which a core network side bearer established by a target eNodeB fails to be established due to a certain subscription restriction, and specifically includes: [82] Step 501, the UE from the source eNode
  • the target eNodeB informs the MME through the path switch request message: The cell has been changed and carries a list of radio resources that failed to establish an air interface in the message.
  • the MME reselects the S-G W that it serves for the UE, that is, the target S-GW.
  • Step 502 The MME checks, according to the subscription data of the user, that the MME is incapable of establishing a bearer setup request to the target S-GW.
  • the MME generates a list of successfully established bearers or a list of failed bearers based on the bearer establishment.
  • the MME initiates a timer for monitoring the release of resources on the core network side.
  • Step 503 The MME sends the bearer setup state information to the target eNodeB or deletes the bearer request by using the path switch response.
  • the MME may also send bearer setup status information to the target eNodeB through a single message, or delete the bearer request.
  • the foregoing bearer setup status information includes: establishing a list of successful bearers, or establishing a list of failed bearers.
  • the deleting the bearer request includes: deleting all the requests for the radio bearers corresponding to the core network side bearers that fail to be established.
  • Step 504 The target eNodeB processes the radio bearer according to the bearer setup status information sent by the MME or the delete bearer request.
  • the processing of the radio bearer by the target eNodeB includes: immediately deleting the radio bearer corresponding to the part of the bearer that fails to be established on the core network side; or temporarily saving the radio bearer corresponding to the part of the core network side that fails to be established, After a period of time, the handover request is re-initiated to the MME. If the handover is still not successful, the target eNodeB deletes the corresponding radio bearer. Alternatively, if the multiple-requested bearer setup process fails, the target eNodeB deletes the corresponding radio bearer. .
  • Step 505 After receiving the path switch response, the target eNodeB informs the source eNodeB to release the radio resource.
  • Step 506a After the timer started in step 502 is exceeded, the MME sends a bearer deletion request to the source S-GW, that is, the resource release to the source S-GW is initiated.
  • Step 506b The source S-GW returns a response to the resource release result to the MME.
  • the failed bearer is established on the core network side by establishing the state information according to the bearer provided by the MME on the core network side.
  • the corresponding radio bearers are deleted and processed, which effectively saves air interface resources.
  • FIG. 6 is a flowchart of a method for maintaining a radio bearer according to Embodiment 4 of the present invention, which is applicable to a situation in which a core network side bearer established by a target eNodeB fails to be established due to some signing restrictions, and specifically includes:
  • Step 601 UE from source eNode
  • the target eNodeB informs the MME through the path switch request message: The cell has been changed and carries a list of radio resources that failed to establish an air interface in the message.
  • the MME reselects the S-G W that it serves for the UE, that is, the target S-GW.
  • Step 602 According to the check of the subscription data, the MME finds that some bearers initiated by the UE cannot be successfully established due to certain subscription restrictions, such as QoS restrictions, and no longer initiates a bearer setup request to the target S-GW. The MME generates a list of successfully established bearers or a list of failed bearers based on the bearer establishment. The MME starts a timer for monitoring the release of resources on the core network side.
  • certain subscription restrictions such as QoS restrictions
  • Step 603 The MME returns a path switch response to the target eNodeB.
  • Step 604 The MME sends a single bearer status notification message to the target eNodeB, where the message may be a single bearer setup success message or a single bearer setup failure message; or may be initiated to the target eNodeB for the bearer that fails to be established on the core network side.
  • a single bearer deletion request carried by the corresponding wireless network is deleted, that is, a response to the failure of the bearer establishment on the core network side is received, and a single bearer deletion request on the wireless network side is initiated. This step can occur before step 604.
  • Step 605 The target eNodeB processes the radio bearer according to the status notification message or the single bearer deletion request received by the MME.
  • the processing performed by the target eNodeB on the radio bearer includes: immediately deleting the part of the radio bearer corresponding to the failure of the establishment of the core network side; or temporarily saving the part of the core network side that fails to be established. Carrying the corresponding radio bearer, after a period of time, re-initiating a handover request to the MME, if still not successfully established, the target eNodeB deletes the corresponding radio bearer; or, in the case that the multiple-requested bearer establishment process fails, the target The eNodeB then deletes the corresponding radio bearer.
  • Step 606 The target eNodeB informs the source eNodeB to release the radio resource.
  • Step 607a After the timer started in step 602 is exceeded, the MME sends a bearer deletion request to the source S-GW, that is, the resource release to the source S-GW is initiated.
  • Step 607b The source S-GW returns a response to the resource release result to the MME.
  • the core network side is established by using a single bearer status notification message or a single bearer deletion request sent by the MME.
  • the radio bearer corresponding to the failed bearer is deleted and processed, which effectively saves air interface resources.
  • FIG. 7 shows an apparatus according to Embodiment 5 of the present invention, which specifically includes: an information acquiring unit 701 and a bearer deleting unit 702 .
  • the information obtaining unit 701 is configured to acquire the bearer setup state information of the core network side.
  • the bearer deletion unit 702 is configured to delete the radio bearer corresponding to the bearer that fails to be established on the core network side according to the bearer setup state information acquired by the information acquiring unit 701.
  • the bearer setup retry unit 703 is further configured to: according to the bearer setup state information of the core network side provided by the information acquiring unit 701, temporarily save the radio bearer corresponding to the part of the bearer that fails to be established on the core network side.
  • the bearer deleting unit 702 is configured to delete the radio bearer corresponding to the bearer that fails to be established on the core network side.
  • the information obtaining unit 701 may be located on the core network side, and the method for obtaining the bearer setup state information includes: acquiring the bearer setup state information according to the setup bearer response; or determining whether the core network side bearer is capable according to the user subscription data check. Established to obtain bearer establishment status information.
  • the communication system 80 includes a wireless network side 801 and a core network side 802 with which it can communicate, where:
  • the wireless network side 801 is configured to initiate a network handover process, and delete the wireless bearer corresponding to the bearer that fails to be established on the core network side according to the received bearer deletion request or the bearer setup state information sent by the core network side.
  • the core network side 802 is configured to: after the foregoing wireless network side initiates the handover process, acquire bearer setup state information in the core network handover process, and send a bearer deletion request to the wireless network side according to the bearer setup state information or Bearer establishment status information.
  • the wireless network side 801 further includes: a request switching unit 8011, an information receiving unit 8012, and a bearer processing unit 8013;
  • the core network side 802 further includes: an information acquisition unit 8021, a notification unit 8022.
  • the request switching unit 8011 is configured to initiate a network handover process, requesting the core network to perform network switching.
  • the information obtaining unit 8021 is configured to acquire the establishment state information carried in the core network handover process after the requesting handover unit 8011 initiates the network handover process;
  • the notification unit 8022 is configured to establish, according to the core network side bearer establishment status information acquired by the information acquiring unit 8021.
  • the bearer deletion request specifically includes: deleting a request for a radio bearer corresponding to a bearer that fails to be established on the core network side;
  • the information receiving unit 8012 is configured to receive the bearer deletion request or the bearer setup status sent by the notification unit 8022.
  • the bearer processing unit 8013 is configured to delete the radio bearer corresponding to the bearer that fails to be established on the core network side according to the information received by the information receiving unit 8012.

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Description

说明书 一种维护无线承载的方法、 装置及系统
[1] 本申请要求于 2008年 08月 14日提交中国专利局、 申请号为 200810142463.6、 发 明名称为"一种维护无线承载的方法、 装置及系统"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。
[2] 技术领域
[3] 本发明涉及无线通信技术领域, 尤其涉及一种维护无线承载的方法、 装置及系 统。
[4] 发明背景
[5] 目前在 3GPP (Third Generation Partnership Project
第三代合作伙伴计划) 中, 各厂商积极研究 LTE (Long Term Evolved 长期演进网络) /SAE (System Architecture Evolved
系统架构演进网络) , LTE的目的是提供一种能够降低吋延、 提高用户数据速率 、 改进的系统容量和覆盖的低成本的网络, 使用 PS (Packet Switched 分组交换) 域业务, 承载网络都为 IP承载。 已确定的一种 LTE/SAE网络架构如图 1所示:
[6] 下述对 LTE/SAE演进网络架构及其功能说明, 在演进的分组核心网中:
[7] MME (Mobility Management Entity移动性管理实体) 的功能是保存 UE (User
Equipment
终端、 用户或用户设备) 的移动性管理上下文, 如用户的标识, 移动性管理状 态、 位置信息等, 并对 NAS(Non Access Stratum
非接入层)信令进行处理, 负责 NAS信令的安全等。
[8] SAE GW(System Architecture Evolved Gateway
系统架构演进网络网关)包括两部分 S-GW (Serving Gateway
服务网关)和 P-GW (PDN Gateway
分组数据网络网关) 。 S-GW与 P-GW是两个逻辑实体, 可以存在于同一个或不 同的物理实体上。 S-GW上保存 UE的用户面上下文, 如 UE的 IP地址和路由信息, 执行合法监听、 分组数据路由功能等。 S-GW与 MME之间的接口是 Sl l, 负责 MME、 S-GW之间 通信, 进行 UE的移动性管理信息与会话控制信息等交互。
MME通过 S 1 -MME, S-GW通过 S 1 -U分别与 E-UTRAN网络负责控制面和用户面 的连接。 同吋 MME通过 S3接口, S-GW通过 S4接口分别与 2G/3G
SGSN (服务 GPRS支持节点) 连接, 分别负责 UE在 2G/3G和 SAE网络之间的移 动性控制面锚点和用户面锚点功能。
P-GW负责 UE接入到分组数据网的用户面锚点功能, 通过 SGi参考点与外部分 组数据网进行通信, 具有分组路由和转发的功能, 并负责策略计费增强功能、 基于每个用户的分组过滤功能等。 P-GW通过 S5接口与 S-GW进行相连, 传递承 载建立 /修改 /删除等控制信息, 以及分组数据路由等。
Figure imgf000004_0001
服务 GPRS支持节点) 作为一个基本的组成网元, 其主要的作用就是为本 SGSN 服务区域的 MS (Mobile Station
移动终端) 转发输入 /输出的 IP分组。 SGSN提供的功能包括: 本 SGSN区域内的 分组数据包的路由与转发功能, 为本 SGSN区域内的所有 PS用户提供服务; 加密 与鉴权功能; 会话管理功能; 移动性管理功能; SGSN负责 UE在 2G/3G和 SAE网 络之间的移动性控制面锚点和用户面锚点功能。 SGSN与 MME之间的接口是 S3 , SGSN与 S-GW之间的接口是 S4。
E-UTRAN (Evolved Universal Terrestrial Radio Access Network
演进全球陆地无线接入网) 是演进网络无线接入网, 由 eNodeB (Evolved NodeB 演进基站) 组成, eNodeB之间可以通过 X2接口互联。
PCRF(Policy and Charging Rules Function
策略计费规则功能)通过 S7接口向 P-GW传递 QoS和计费策略控制信息等。
在 LTE/SAE网络内, 处于连接状态的 UE从一个 eNodeB (源 eNode B: Source eNodeB) 控制区域进入到另外一个 eNodeB (目标 eNodeB: Target
eNodeB) 的控制区域吋, 需要进行 X2接口的控制信令和传输数据的切换。 X2接 口的切换过程分为切换准备阶段、 切换执行阶段和切换完成阶段三部分。 切换 准备阶段主要是完成在目标 eNodeB上的资源预留过程; 切换执行阶段完成空口 切换过程, 包括 UE到目标小区的同步、 目标小区为 UE分配接入信道等; 切换完 成阶段主要执行的是核心网的承载的切换过程, 包括目标 eNodeB到 S-GW上的上 下行承载的建立以及 S-GW向 P-GW发起的承载信息的更新过程等。
[16] 在实现本发明过程中, 发明人发现现有技术中至少存在如下问题: 现有技术中 , 在切换准备 /切换执行阶段已经完成空中接口无线承载的成功切换, 而在切换 完成阶段, 由于某些原因使得切换成功的部分空中接口无线承载在核心网络侧 的相应承载建立失败, 从而造成空中接口无线资源的浪费。 例如, 上述引起核 心网络侧的相应承载建立失败的原因可以包括: MME根据用户签约数据的限制 决定是否需要建立核心网的承载, 即可能存在着因为某些签约限制使得目标 eNo deB请求的核心网承载建立失败; 或者, 如果为 UE服务的 S-GW发生了改变, 在 MME向目标 S-GW发起的承载建立过程中, 因为目标 S-GW上资源不足, 也可能 导致核心网承载建立失败。
[17] 发明内容
[18] 本发明实施例提供了一种维护无线承载的方法、 装置及系统, 使得在网络切换 过程中, 空口资源得到有效节省。
[19] 依据本发明实施例的维护无线承载的方法, 包括: 接收核心网络节点发送的核 心网络侧承载建立状态信息或者删除承载请求; 删除核心网络侧建立失败的承 载对应的无线承载。
[20] 本发明实施例还提供了一种维护无线承载的方法, 包括:
[21] 核心网络节点通知无线网络节点核心网络侧的承载建立状态信息;
[22] 以使得所述无线网络节点根据所述核心网络节点提供的核心网络侧的承载建立 状态信息对核心网络侧建立失败的承载对应的无线承载进行处理。
[23] 本发明实施例还提供了一种装置, 具体包括:
[24] 信息获取单元: 用于获取核心网络侧的承载建立状态信息;
[25] 承载删除单元: 用于根据所述信息获取单元获取的承载建立状态信息, 删除核 心网络侧建立失败的承载对应的无线承载。
[26] 本发明实施例还提供了一种通信系统, 具体包括: 无线网络侧和能与其进行通 信的核心网络侧, 其中: 无线网络侧, 用于发起网络切换过程, 并根据接收的 核心网络侧发送的承载删除请求或者承载建立状态信息, 删除核心网络侧建立 失败的承载对应的无线承载; 核心网络侧, 用于在上述无线网络侧发起切换过 程后, 获取在核心网络切换过程中的承载建立状态信息, 并根据上述承载建立 状态信息向上述无线网络侧发送承载删除请求或者承载建立状态信息。
[27] 通过比较可以发现, 上述技术方案与现有技术相比, 本发明实施例通过接收核 心网络节点发送的删除承载请求或者核心网络侧承载建立状态信息; 删除核心 网络侧建立失败的承载对应的无线承载; 可以使得空口资源得到有效节省。
[28] 附图简要说明
[29] 图 1为 LTE/SAE网络架构简图;
[30] 图 2为本发明实施例所提供的维护无线承载方法的总体技术方案流程图;
[31] 图 3为本发明实施例 1所提供的维护无线承载的方法流程图;
[32] 图 4为本发明实施例 2所提供的维护无线承载的方法流程图;
[33] 图 5为本发明实施例 3所提供的维护无线承载的方法流程图;
[34] 图 6为本发明实施例 4所提供的维护无线承载的方法流程图;
[35] 图 7为本发明实施例 5所提供的装置示意图;
[36] 图 8为依据本发明实施例的通信系统示意图。
[37] 实施本发明的方式
[38] 为使本发明的目的、 技术方案和优点更加清楚, 下面结合附图对本发明各实施 例作进一步的详细描述。
[39] 本发明实施例提供了一种维护无线承载的方法, 总体技术方案流程如图 2所示
[40] UE从源 eNode
B控制区域切换至目标 eNodeB的控制区域过程中, 当无线网络节点间的切换准备 和切换执行阶段完成后, 目标无线网络节点, 如目标 eNodeB , 向核心网络节点 发起核心网络切换请求, 核心网络节点建立承载, 然后执行如下步骤:
[41] 在步骤 201中, 核心网络节点根据核心网络侧的承载建立情况, 获取承载建立 状态信息。 [42] 可选的, 核心网络节点对无线网络请求建立的承载进行批处理, 即在接收到切 换请求以后, 核心网络节点启动一个计吋器, 用于控制核心网络节点监控核心 网络侧承载建立状态的吋长。 该计吋器吋长可以基于需要等待接收的消息个数 或者基于消息类型等进行设置。 该吋长应该保证在正常情况下, 核心网络节点 能够接收到所有成功建立的承载响应。
[43] 当计吋器到吋以后, 核心网络节点根据承载建立情况, 生成一个核心网络侧承 载建立状态信息列表, 该列表可以为建立成功的承载的列表, 也可以为建立失 败的承载的列表。 在计吋器到吋以前, 核心网络侧还未建立的承载都视为承载 建立失败, 包含到建立失败的承载的列表之中。
[44] 在步骤 202中, 核心网络节点通知无线网络节点核心网络侧的承载建立状态信 息。
[45] 该信息可以为批处理情况, 如在一条消息中携带建立成功的承载的列表或建立 失败的承载的列表。 此吋, 该信息可以携带在核心网络节点向无线网络节点返 回的切换响应消息中, 也可以由核心网络节点向无线网络节点发送的其他消息 携带。
[46] 该信息也可以为非批处理的情况, 如针对每条承载, 核心网络节点都发送一条 承载建立状态的通知消息。 该消息可以是单条承载建立成功的消息或者单条承 载建立失败的消息。 可选的, 核心网络节点根据单条承载建立情况, 请求无线 网络节点删除核心网络建立失败的承载对应的无线承载。
[47] 在步骤 203中, 无线网络节点根据核心网络节点提供的核心网络侧的承载建立 状态信息或承载删除请求, 对核 ^网络侧建立失败的承载对应的无线承载进行 处理。
[48] 该处理包括: 立即删除在无线网络节点上建立成功但在核心网络侧建立失败的 那部分承载; 或者, 暂吋保存核心网络侧建立失败的那部分承载对应的无线承 载, 在一段吋间以后, 重新向核心网络节点发起切换请求, 使得核心网络节点 再次建立相应的承载, 如果还是无法成功建立, 再删除相应的承载。
[49] 图 3所示为本发明实施例 1所提供的维护无线承载的方法流程, 适用于因目标 S- GW上资源不足导致核心网络侧承载建立失败的情况, 具体包括: [50] 步骤 301、 UE从源 eNode
B控制区域切换至目标 eNodeB的控制区域过程中, 在切换准备和切换执行阶段完 成后, 即空中接口的无线资源已经从源 eNodeB切换到了目标 eNodeB以后, 目标 eNodeB通过路径切换请求消息告知 MME: UE已经更改了小区, 并且在该消息 中携带空中接口建立失败的无线资源列表。 MME为 UE重新选择为其服务的 S-G W, 即目标 S-GW。
[51] 步骤 302、 MME启动计吋器 I。
[52] 该计吋器 I用于设置预定吋长, 该预定吋长为核心网络节点监控核心网络侧承 载建立状态的吋长。 该预定吋长可以基于设置、 基于需要等待接收的消息个数 或者基于消息类型。 该预定吋长设置的原则包括: 保证在正常情况下, 核心网 络节点能够接收到所有成功建立的承载响应。
[53] 步骤 303、 MME通过接收到的路径切换请求信息, 向目标 S-GW发起承载建立 请求。
[54] 步骤 304、 目标 S-GW向 MME发送建立承载响应。
[55] MME收到该消息以后, 启动一个计吋器 II, 用于监控核心网络侧的资源的释放 吋刻。
[56] 步骤 305、 计吋器 I超吋后, MME根据核心网络侧的承载建立状态, 生成建立成 功的承载的列表或建立失败的承载的列表。 该吋刻, 如果还没有收到步骤 303发 起的需要建立承载的承载建立响应, 都视为该承载建立失败。
[57] 步骤 306、 MME通过路径切换响应向目标 eNodeB发送承载建立状态信息, 或者 删除承载请求。
[58] MME也可以通过单独一条消息向目标 eNodeB发送承载建立状态信息, 或者删 除承载请求。
[59] 上述承载建立状态信息包括: 建立成功的承载的列表, 或者建立失败的承载的 列表。
[60] 上述删除承载请求包括: 删除所有建立失败的核心网络侧承载对应的无线承载 的请求。
[61] 步骤 307、 目标 eNodeB根据接收到 MME发送的承载建立状态信息或者删除承载 请求, 对无线承载进行处理。
[62] 目标 eNodeB对无线承载进行的处理包括: 立即删除在核心网络侧建立失败的 那部分承载对应的无线承载; 或者, 暂吋保存核心网络侧建立失败的那部分承 载对应的无线承载, 在一段吋间以后, 重新向 MME发起切换请求, 使得 MME再 次请求目标 S-GW建立相应的承载, 如果还是无法成功建立, 目标 eNodeB再删除 相应的承载; 或者, 在一段吋间以后再次尝试向 MME发起切换请求, 在多次请 求的承载建立过程失败的情况下, 目标 eNodeB删除相应的承载。
[63] 步骤 308、 目标 eNodeB告知源 eNodeB释放无线资源。
[64] 步骤 309a、 当计吋器 II超吋以后, MME向源 S-GW发送承载删除请求, 即发起 到源 S-GW的资源释放。
[65] 步骤 309b、 源 S-GW返回资源释放结果的响应到 MME。
[66] 需要特别说明的是, 步骤 309a、 309b的执行吋间决定于计吋器 II的吋间, 与步 骤 305~308在执行顺序上无必然先后关系。
[67] 本实施例中, 在因目标 S-GW上资源不足导致核心网承载建立失败的情况下, 通过根据 MME发送的核心网络侧建立成功的承载的列表或建立失败的承载的列 表, 对核心网络侧建立失败的承载对应的无线承载进行删除等处理, 有效节省 了空口资源。
[68] 图 4所示为本发明实施例 2所提供的维护无线承载的方法流程, 适用于因目标 S- GW上资源不足导致核心网络侧承载建立失败的情况, 具体包括:
[69] 步骤 401、 UE从源 eNode
B控制区域切换至目标 eNodeB的控制区域过程中, 在切换准备和切换执行阶段完 成后, 即空中接口的无线资源已经从源 eNodeB切换到了目标 eNodeB以后, 目标 eNodeB通过路径切换请求消息告知 MME: UE已经更改了小区, 并且在该消息 中携带空中接口建立失败的无线资源列表。 MME为 UE重新选择为其服务的 S-G W, 即目标 S-GW。
[70] 步骤 402、 MME通过接收到的路径切换请求, 向目标 S-GW发起承载建立请求 [71] 步骤 403、 目标 S-GW向 MME发送建立承载响应。 [72] MME收到该消息以后, 启动计吋器, 用于监控核心网络侧的资源的释放吋刻 [73] 步骤 404、 MME向目标 eNodeB返回路径切换响应。
[74] 步骤 405、 MME根据步骤 403接收到的承载建立响应, 向目标 eNodeB发送单条 承载的状态通知消息, 该消息可以是单条承载建立成功的消息或者单条承载建 立失败的消息; 或者对于核心网络侧建立失败的承载, 向目标 eNodeB发起删除 与之对应的无线网络的承载的单条承载删除请求, 即收到一条核心网络承载承 载建立失败的响应, 就发起一条无线网络侧的单条承载删除请求。 此步骤可以 发生在步骤 404之前。
[75] 步骤 406、 目标 eNodeB根据接收到 MME发送的单条承载的状态通知消息或者单 条承载删除请求, 对无线承载进行处理。
[76] 目标 eNodeB对无线承载进行的处理包括: 立即删除在核心网络侧建立失败的 那部分承载对应的无线承载; 或者, 暂吋保存核心网络侧建立失败的那部分承 载对应的无线承载, 在一段吋间以后, 重新向 MME发起切换请求, 使得 MME再 次请求目标 S-GW建立相应的承载, 如果还是无法成功建立, 目标 eNodeB再删除 相应的承载; 或者, 在一段吋间以后再次尝试向 MME发起切换请求, 在多次请 求的承载建立过程失败的情况下, 目标 eNodeB删除相应的承载。
[77] 步骤 407、 目标 eNodeB在收到路径切换响应以后, 告知源 eNodeB释放无线资源
[78] 步骤 408a、 当步骤 403启动的计吋器超吋以后, MME向源 S-GW发送承载删除 请求, 即发起到源 S-GW的资源释放。
[79] 步骤 408b、 源 S-GW向返回资源释放结果的响应到 MME。
[80] 本实施例中, 在因目标 S-GW上资源不足导致核心网承载建立失败的情况下, 通过根据 MME发送的单条承载的状态通知消息或者单条承载删除请求, 对核心 网络侧建立失败的承载对应的无线承载进行删除等处理, 有效节省了空口资源
[81] 图 5所示为本发明实施例 3所提供的维护无线承载的方法流程, 适用于因某些签 约限制使得目标 eNodeB请求的核心网络侧承载建立失败的情况, 具体包括: [82] 步骤 501、 UE从源 eNode
B控制区域切换至目标 eNodeB的控制区域过程中, 在切换准备和切换执行阶段完 成后, 即空中接口的无线资源已经从源 eNodeB切换到了目标 eNodeB以后, 目标 eNodeB通过路径切换请求消息告知 MME: UE已经更改了小区, 并且在该消息 中携带空中接口建立失败的无线资源列表。 MME为 UE重新选择为其服务的 S-G W, 即目标 S-GW。
[83] 步骤 502、 MME根据用户签约数据的检査, 发现由于某些签约限制, 如 QoS限 制, 使得 UE发起的某些承载无法被成功建立, 不再向目标 S-GW发起承载建立请 求。 MME根据承载建立的情况, 生成一个建立成功的承载的列表或建立失败的 承载的列表。
[84] MME启动一个计吋器, 用于监控核心网络侧的资源的释放吋刻。
[85] 步骤 503、 MME通过路径切换响应向目标 eNodeB发送承载建立状态信息或者删 除承载请求。
[86] MME也可以通过单独一条消息向目标 eNodeB发送承载建立状态信息, 或者删 除承载请求。
[87] 上述承载建立状态信息包括: 建立成功的承载的列表, 或者建立失败的承载的 列表。
[88] 上述删除承载请求包括: 删除所有建立失败的核心网络侧承载对应的无线承载 的请求。
[89] 步骤 504、 目标 eNodeB根据接收到 MME发送的承载建立状态信息或者删除承载 请求, 对无线承载进行处理。
[90] 目标 eNodeB对无线承载进行的处理包括: 立即删除在核心网络侧建立失败的 那部分承载对应的无线承载; 或者, 暂吋保存核心网络侧建立失败的那部分承 载对应的无线承载, 在一段吋间以后, 重新向 MME发起切换请求, 如果还是无 法成功建立, 目标 eNodeB再删除相应的无线承载; 或者, 在多次请求的承载建 立过程失败的情况下, 目标 eNodeB再删除相应的无线承载。
[91] 步骤 505、 目标 eNodeB在收到路径切换响应以后, 告知源 eNodeB释放无线资源 [92] 步骤 506a、 当步骤 502启动的计吋器超吋以后, MME向源 S-GW发送承载删除 请求, 即发起到源 S-GW的资源释放。
[93] 步骤 506b、 源 S-GW向返回资源释放结果的响应到 MME。
[94] 本实施例中, 在因某些签约限制使得目标 eNodeB请求的核心网承载建立失败 的情况下, 通过根据 MME提供的核心网络侧的承载建立状态信息, 对核心网络 侧建立失败的承载对应的无线承载进行删除等处理, 有效节省了空口资源。
[95] 图 6所示为本发明实施例 4所提供的维护无线承载的方法流程, 适用于因某些签 约限制使得目标 eNodeB请求的核心网络侧承载建立失败的情况, 具体包括:
[96] 步骤 601、 UE从源 eNode
B控制区域切换至目标 eNodeB的控制区域过程中, 在切换准备和切换执行阶段完 成后, 即空中接口的无线资源已经从源 eNodeB切换到了目标 eNodeB以后, 目标 eNodeB通过路径切换请求消息告知 MME: UE已经更改了小区, 并且在该消息 中携带空中接口建立失败的无线资源列表。 MME为 UE重新选择为其服务的 S-G W, 即目标 S-GW。
[97] 步骤 602、 MME根据签约数据的检査, 发现由于某些签约限制, 如 QoS限制, 使得 UE发起的某些承载无法被成功建立, 不再向目标 S-GW发起承载建立请求。 MME根据承载建立的情况, 生成一个建立成功的承载的列表或建立失败的承载 的列表。 MME启动一个计吋器, 用于监控核心网络侧的资源的释放吋刻。
[98] 步骤 603、 MME向目标 eNodeB返回路径切换响应。
[99] 步骤 604、 MME向目标 eNodeB发送单条承载的状态通知消息, 该消息可以是单 条承载建立成功的消息或者单条承载建立失败的消息; 或者对于核心网络侧建 立失败的承载, 向目标 eNodeB发起删除与之对应的无线网络的承载的单条承载 删除请求, 即收到一条核心网络侧的承载建立失败的响应, 就发起一条无线网 络侧的单条承载删除请求。 此步骤可以发生在步骤 604之前。
[100] 步骤 605、 目标 eNodeB根据接收到 MME发送的单条承载的状态通知消息或者单 条承载删除请求, 对无线承载进行处理。
[101] 目标 eNodeB对无线承载进行的处理包括: 立即删除在核心网络侧建立失败的 那部分承载对应的无线承载; 或者, 暂吋保存核心网络侧建立失败的那部分承 载对应的无线承载, 在一段吋间以后, 重新向 MME发起切换请求, 如果还是无 法成功建立, 目标 eNodeB再删除相应的无线承载; 或者, 在多次请求的承载建 立过程失败的情况下, 目标 eNodeB再删除相应的无线承载。
[102] 步骤 606、 目标 eNodeB告知源 eNodeB释放无线资源。
[103] 步骤 607a、 当步骤 602启动的计吋器超吋以后, MME向源 S-GW发送承载删除 请求, 即发起到源 S-GW的资源释放。
[104] 步骤 607b、 源 S-GW向返回资源释放结果的响应到 MME。
[105] 本实施例中, 在因某些签约限制使得目标 eNodeB请求的核心网承载建立失败 的情况下, 通过根据 MME发送的单条承载的状态通知消息或者单条承载删除请 求, 对核心网络侧建立失败的承载对应的无线承载进行删除等处理, 有效节省 了空口资源。
[106] 本领域普通技术人员可以理解, 上述各实施例中的全部或部分步骤可以通过程 序指令相关的硬件来实现, 所述的程序可以存储于计算机可读取存储介质中, 所述的存储介质, 可以是 ROM/RAM、 磁碟、 光盘等。
[107] 还可以理解的是, 虽然上述说明中, 为便于理解, 对方法的步骤釆用了顺序性 描述, 但是应当指出的是, 对于上述步骤的顺序并不做严格的限制。
[108] 图 7所示为本发明实施例 5提供的一种装置, 具体包括: 信息获取单元 701及承 载删除单元 702。 其中信息获取单元 701用于获取核心网络侧的承载建立状态信 息; 承载删除单元 702用于根据信息获取单元 701获取的承载建立状态信息, 删 除核心网络侧建立失败的承载对应的无线承载。
[109] 可选的, 进一步包括承载建立重试单元 703, 用于根据信息获取单元 701提供的 核心网络侧的承载建立状态信息, 暂吋保存核心网络侧建立失败的那部分承载 对应的无线承载, 当再次或多次尝试建立承载失败后, 再通知承载删除单元 702 删除上述核心网络侧建立失败的承载对应的无线承载。
[110] 信息获取单元 701可以位于核心网络侧, 获取承载建立状态信息的方式包括: 根据建立承载响应获取承载建立状态信息; 或者, 根据对用户签约数据检査, 判断上述核心网络侧承载是否能够建立, 从而获取承载建立状态信息。
[111] 下面介绍本发明实施例涉及的移动通讯系统实施例, 该系统可以实现如上述方 法实施例中所描述的步骤, 可以理解的是, 本发明实施例中的该系统还可以包 含实现通信功能的其它众多实体, 对于其它现有技术中可能揭示的技术属于通 信领域内已规范化的技术, 本实施例中不再赞述细节; 但是为了介绍本发明实 施例中的实现方案, 这里仅指出了该系统中主要部分。 请参阅图 8, 该通信系统 80包括无线网络侧 801和能与其进行通信的核心网络侧 802, 其中:
[112] 无线网络侧 801, 用于发起网络切换过程, 并根据接收的核心网络侧发送的承 载删除请求或者承载建立状态信息, 删除核心网络侧建立失败的承载对应的无 线承载;
[113] 核心网络侧 802, 用于在上述无线网络侧发起切换过程后, 获取在核心网络切 换过程中的承载建立状态信息, 并根据该承载建立状态信息向上述无线网络侧 发送承载删除请求或者承载建立状态信息。
[114] 无线网络侧 801进一步包括: 请求切换单元 8011、 信息接收单元 8012以及承载 处理单元 8013;
[115] 核心网络侧 802进一步包括: 信息获取单元 8021、 通知单元 8022。
[116] 其中, 请求切换单元 8011用于发起网络切换过程, 请求核心网络进行网络切换
[117] 信息获取单元 8021用于在请求切换单元 8011发起网络切换过程后, 获取在核心 网络切换过程中承载的建立状态信息;
[118] 通知单元 8022用于根据信息获取单元 8021获取的核心网络侧承载建立状态信息
, 向无线网络侧 801的信息接收单元 8012发送承载删除请求或者承载建立状态信 息;
[119] 该承载删除请求具体包括: 删除核心网络侧建立失败的承载对应的无线承载的 请求;
[120] 信息接收单元 8012用于接收通知单元 8022发送的承载删除请求或者承载建立状 态 ί曰息;
[121] 承载处理单元 8013用于根据信息接收单元 8012接收的信息, 删除核心网络侧建 立失败的承载对应的无线承载。
[122] 可以理解的是, 附图中所示的结构仅仅是示意性的, 表示逻辑结构, 其中所述 作为分离部件显示的单元可能是或者可能不是物理上分开的, 作为单元显示的 部件可能是或者可能不是物理单元, 即可以位于一个地方或者分布到几个网络 单元上。
[123] 附图和相关描述只是为了说明本发明的原理, 并非用于限定本发明的保护范围 。 例如, 本发明各实施例中的消息名称可以根据网络的不同而有所变化, 一些 消息也可以省略。 因此, 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, 均包含在本发明的保护范围内。
[124] 以上所述, 仅为本发明较佳的具体实施方式, 但本发明的保护范围并不局限于 此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易想到 的变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保护范围 应该以权利要求的保护范围为准。

Claims

权利要求书
[1] 一种维护无线承载的方法, 其特征在于, 包括:
接收核心网络节点发送的核心网络侧承载建立状态信息或者删除承载请求 删除核心网络侧建立失败的承载对应的无线承载。
[2] 根据权利要求 1所述方法, 其特征在于, 进一步包括:
所述核心网络节点根据接收到的建立承载响应, 生成所述承载建立状态信 息或者删除承载请求;
或者, 所述核心网络节点根据签约数据检査结果, 生成所述承载建立状态 信息或者删除承载请求。
[3] 根据权利要求 1所述方法, 其特征在于, 所述删除核心网络侧建立失败的承 载对应的无线承载具体包括:
将核心网络侧建立失败的承载对应的无线承载立即删除;
或者, 暂吋保存核心网络侧建立失败的承载对应的无线承载, 当再次或多 次尝试建立承载失败后, 再删除所述核心网络侧建立失败的承载对应的无 线承载。
[4] 根据权利要求 1、 2或 3所述方法, 其特征在于, 所述核心网络侧承载建立状 态信息包括:
承载列表, 或者单条承载信息。
[5] 根据权利要求 4所述方法, 其特征在于,
所述承载列表包括:
核心网络侧建立成功的承载的列表;
或者, 核心网络侧建立失败的承载的列表。
[6] 根据权利要求 4所述方法, 其特征在于,
所述单条承载信息包括:
核心网络侧建立成功的单条承载信息;
或者, 核心网络侧建立失败的单条承载信息。
[7] 根据权利要求 4所述方法, 其特征在于, 所述核心网络节点根据预定吋长内 接收的建立承载响应, 生成所述承载列表。
[8] —种维护无线承载的方法, 其特征在于, 包括:
核心网络节点通知无线网络节点核心网络侧的承载建立状态信息; 以使得所述无线网络节点根据所述核心网络节点提供的核心网络侧的承载 建立状态信息对核心网络侧建立失败的承载对应的无线承载进行处理。
[9] 根据权利要求 8所述的方法, 所述处理包括删除所述核心网络侧建立失败的 承载对应的无线承载。
[10] 根据权利要求 8或 9所述的方法, 其特征在于, 所述核心网络侧承载建立状 态信息包括:
承载列表, 或者单条承载信息。
[11] 根据权利要求 10所述方法, 其特征在于,
所述承载列表包括:
核心网络侧建立成功的承载的列表;
或者, 核心网络侧建立失败的承载的列表。
[12] 一种装置, 其特征在于, 具体包括:
信息获取单元: 用于获取核心网络侧的承载建立状态信息; 承载删除单元: 用于根据所述信息获取单元获取的承载建立状态信息, 删 除核心网络侧建立失败的承载对应的无线承载。
[13] 根据权利要求 12所述装置, 其特征在于, 进一步包括:
承载建立重试单元, 用于根据信息获取单元提供的核心网络侧的承载建立 状态信息, 暂吋保存核心网络侧建立失败的承载对应的无线承载; 当再次 或多次尝试建立承载失败后, 再通知承载删除单元删除所述核心网络侧建 立失败的承载对应的无线承载。
[14] 一种通信系统, 其特征在于, 具体包括: 无线网络侧和能与其进行通信的 核心网络侧, 其中:
无线网络侧, 用于发起网络切换过程, 并根据接收的核心网络侧发送的承 载删除请求或者承载建立状态信息, 删除核心网络侧建立失败的承载对应 的无线承载; 核心网络侧, 用于获取在核心网络切换过程中的承载建立状态信息, 并根 据所述承载建立状态信息向所述无线网络侧发送承载删除请求或者承载建 立状态信息。
[15] 根据权利要求 14所述通信系统, 其特征在于:
所述无线网络侧包括: 请求切换单元、 信息接收单元以及承载处理单元; 所述核心网络侧包括: 信息获取单元、 通知单元;
所述请求切换单元, 用于发起网络切换过程, 请求核心网络进行网络切换 所述信息获取单元, 用于在所述请求切换单元发起网络切换过程后, 获取 在核 ^网络切换过程中承载的建立状态信息;
所述通知单元, 用于根据所述信息获取单元获取的核心网络侧承载建立状 态信息, 向所述无线网络侧的信息接收单元发送承载删除请求或者承载建 立状态信息;
所述信息接收单元, 用于接收所述通知单元发送的承载删除请求或者承载 建立状态信息;
所述承载处理单元, 用于根据所述信息接收单元接收的信息, 删除核心网 络侧建立失败的承载对应的无线承载。
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