WO2011160454A1 - 一种消息的处理方法及系统 - Google Patents

一种消息的处理方法及系统 Download PDF

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Publication number
WO2011160454A1
WO2011160454A1 PCT/CN2011/070379 CN2011070379W WO2011160454A1 WO 2011160454 A1 WO2011160454 A1 WO 2011160454A1 CN 2011070379 W CN2011070379 W CN 2011070379W WO 2011160454 A1 WO2011160454 A1 WO 2011160454A1
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Prior art keywords
protocol layer
mobile terminal
connection
message
nas
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PCT/CN2011/070379
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English (en)
French (fr)
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白晓春
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中兴通讯股份有限公司
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Publication of WO2011160454A1 publication Critical patent/WO2011160454A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/20Manipulation of established connections
    • H04W76/27Transitions between radio resource control [RRC] states
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/30Connection release

Definitions

  • the present invention relates to a Long Term Evolution (LTE) system for mobile communication, and more particularly to a message processing method and system.
  • LTE Long Term Evolution
  • the packet system of LTE is composed of an evolved terrestrial radio access network (EUTRAN, Evolved UMTS Terrestrial Radio Access Network) and a core network.
  • EUTRAN the base station equipment is an evolved base station (eNB, evolved Node-B), and is mainly responsible for wireless communication, management of wireless communication, and management of mobility context.
  • eNB evolved base station
  • the communication between the mobile terminal and the eNB uses a Radio Resource Control (RRC) protocol
  • RRC protocol layer is a Non-Access Stratum (NAS) protocol
  • NAS protocol is a mobile terminal and a core.
  • the interactive protocol of the network is composed of an evolved terrestrial radio access network (EUTRAN, Evolved UMTS Terrestrial Radio Access Network) and a core network.
  • RRC Radio Resource Control
  • NAS Non-Access Stratum
  • the RRC protocol layer of the mobile terminal has a connected state and an idle state.
  • the RRC protocol layer is in a connected state, if the mobile terminal and the eNB The established communication link is released, that is, the eNB releases various resources related to the mobile terminal, and then the RRC protocol layer is in an idle state.
  • the RRC protocol layer needs to notify the NAS protocol layer; when the RRC protocol layer is in the connected state, the NAS protocol layer is also in the connected state, when the RRC protocol layer is in the In the idle state, the NAS protocol layer is in a non-connected state; the NAS protocol layer sends different NAS messages in different states.
  • the NAS protocol layer When the NAS protocol layer is in the connected state, if a new service needs to be established, the NAS protocol layer sends a service establishment request. The NAS message is sent to the core network.
  • the NAS protocol layer When the NAS protocol layer is in the non-connected state, the NAS protocol layer needs to initiate the connection establishment NAS message to the core network, and the core network initiates the connection establishment process, between the mobile terminal and the eNB. After the communication link is established, the NAS message of the service establishment request can be sent to the core network.
  • the RRC protocol layer needs to notify the physical layer after 60 ms, in order to wait for the physical layer of the mobile terminal to complete some necessary processing, such as replying of an air interface message. Release the connection and notify the NAS protocol layer that the connection has been released.
  • the RRC protocol layer does not immediately notify the NAS protocol layer after the connection is released, so the NAS protocol layer considers that it is still in the connected state, so in the waiting process after the RRC protocol layer receives the connection release message.
  • the RRC protocol layer forwards the service request message to the eNB. At this time, the eNB may have released the connection, thus causing the service request message to fail to be forwarded. Second, the RRC protocol layer receives the NAS protocol layer. After the service request message is sent, the message is buffered. After the connection is released and the connection between the mobile terminal and the eNB is re-established, the message is sent to the core network through the eNB.
  • the main object of the present invention is to provide a method and system for processing a message, which avoids the problem that the processing of the NAS message fails during the connection release process of the RRC protocol layer waiting for the communication link.
  • the present invention provides a method for processing a message, including:
  • the radio resource control (RRC) protocol layer of the mobile terminal receives the connection release message, the non-access stratum (NAS) protocol layer connection of the mobile terminal is notified to be released, and the NAS protocol layer is connected. State is changed to non-connected state;
  • RRC radio resource control
  • NAS non-access stratum
  • the RRC protocol layer starts a wait timer
  • the RRC protocol layer sends a connection release message to the physical layer.
  • the method before the RRC protocol layer of the mobile terminal notifies the NAS protocol layer that the connection has been released, when the connection release message is received, the method further includes:
  • the evolved base station transmits a connection release message to the mobile terminal.
  • the eNB sends a connection release message to the mobile terminal as:
  • the core network sends a connection release message to the eNB, and the eNB forwards the connection release message to the RRC protocol layer of the mobile terminal.
  • the NAS protocol layer connection for notifying the mobile terminal is released, and the NAS protocol layer is changed from the connected state to the non-connected state:
  • the RRC protocol layer of the mobile terminal sends a message that the connection has been released to the NAS protocol layer of the mobile terminal; the NAS protocol layer changes the value of its state control variable from the corresponding value of the connected state to the corresponding value of the non-connected state.
  • the RRC protocol layer startup wait timer is specifically:
  • the waiting timer of the mobile terminal is triggered to start timing; the waiting time of the waiting timer is 60 ms.
  • the RRC protocol layer sends a connection release message to the physical layer: the operating system sends a message to the RRC protocol layer, and the RRC protocol layer sends a connection release message to the physical layer of the mobile terminal;
  • the method also includes the physical layer releasing memory resources in the mobile terminal for storing link related parameters between the mobile terminal and the eNB.
  • the present invention also provides a message processing system, including: an RRC protocol layer, a NAS protocol layer;
  • the RRC protocol layer is configured to notify the NAS protocol layer that the connection has been released when the connection release message is received. Put and start the wait timer; when the wait timer expires, send a connection release message to the physical layer;
  • the NAS protocol layer is used to change its state from a connected state to a non-connected state.
  • system further includes:
  • the physical layer is configured to release the connection when receiving the connection release message sent by the RRC protocol layer.
  • the system further includes:
  • the eNB is configured to send a connection release message to the RRC protocol layer of the mobile terminal.
  • the method and system for processing a message provided by the present invention, when the RRC protocol layer of the mobile terminal receives the connection release message, first notifies the NAS protocol layer that the connection has been released, and then starts the waiting timer, so the NAS protocol layer waits at the RRC protocol layer. During the time, the NAS message is not sent to the RRC protocol layer, thereby avoiding the problem that the processing of the NAS message fails during the connection release process of the RRC protocol layer waiting for the communication link.
  • FIG. 1 is a schematic flow chart of a method for processing a message according to the present invention
  • FIG. 2 is a schematic structural diagram of a processing system for implementing a message according to the present invention. detailed description
  • the basic idea of the present invention is: when the radio resource control (RRC) protocol layer of the mobile terminal receives the connection release message, notifies the non-access stratum (NAS) protocol layer connection of the mobile terminal that the connection is released, and the NAS protocol layer is connected. Change to non-connected state; RRC protocol layer initiates wait timer; when the timer expires, the RRC protocol layer sends a connection release message to the physical layer.
  • RRC radio resource control
  • FIG. 1 is a schematic flowchart of a method for processing a message according to the present invention. As shown in FIG. 1, the method includes the following steps:
  • Step 101 The eNB sends a connection release message to the mobile terminal. Specifically, when the user does not use the Internet access, the telephone, or the like, or the mobile terminal is shut down for a long time, the core network actively sends a connection release message to the eNB, and after receiving the connection release message sent by the core network, the eNB forwards the connection release message to the eNB.
  • the RRC protocol layer of the mobile terminal is the RRC protocol layer of the mobile terminal.
  • Step 102 The RRC protocol layer of the mobile terminal notifies that the NAS protocol layer connection of the mobile terminal has been released, and the NAS protocol layer is changed from the connected state to the non-connected state;
  • the RRC protocol layer of the mobile terminal receives the connection release message sent by the eNB
  • the message that the connection has been released is sent to the NAS protocol layer of the mobile terminal, and the NAS protocol layer connection is released; the NAS protocol layer receives the RRC protocol.
  • the value of the state control variable is changed from the corresponding value of the connected state to the corresponding value of the non-connected state, and the state is changed from the connected state to the non-connected state.
  • Step 103 The RRC protocol layer starts a waiting timer.
  • the waiting timer of the mobile terminal is triggered to start timing, wherein the waiting time of the waiting timer is specified in the RRC protocol is 60 ms.
  • Step 104 When the timer expires, the RRC protocol layer sends a connection release message to the physical layer, and the physical layer releases the connection.
  • the waiting timer is a program running on an operating system of the mobile terminal.
  • the operating system sends a message to the RRC protocol layer to notify the RRC protocol layer that the waiting timer has expired;
  • the connection release message is sent to the physical layer of the mobile terminal, and the physical layer is notified to release the connection; after receiving the connection release message, the physical layer is used to store the link between the mobile terminal and the eNB in the mobile terminal.
  • the memory resources of related parameters are released.
  • the link-related parameters include the frequency and bandwidth of the link.
  • FIG. 2 is a schematic structural diagram of a message processing system according to the present invention.
  • the system includes: an RRC protocol layer 21 and a NAS protocol layer 22; among them,
  • the RRC protocol layer 21 is configured to notify the NAS protocol layer 22 that the connection has been released when receiving the connection release message; and start a wait timer; and send a connection release message to the physical layer 23 after waiting for the timer to expire;
  • the NAS protocol layer 22 is used to change its state from a connected state to a non-connected state.
  • the system also includes a physical layer 23 for releasing the connection upon receiving a connection release message sent by the RRC protocol layer 21.
  • the system further includes:
  • the eNB 24 is configured to send a connection release message to the RRC protocol layer 21 of the mobile terminal;
  • the eNB 24 sends a connection release message to the RRC protocol layer 21 of the mobile terminal as follows:
  • the core network sends a connection release message to the eNB 24, and the eNB 24 forwards the connection release message to the RRC protocol layer 21 of the mobile terminal.
  • the RRC protocol layer 21 notifies the NAS protocol layer 22 that the connection has been released as: the RRC protocol layer 21 of the mobile terminal sends a message that the connection has been released to the NAS protocol layer 22 of the mobile terminal;
  • the NAS protocol layer 22 changes its state from the connected state to the non-connected state: the NAS protocol layer 22 changes the value of its own state control variable from the corresponding value of the connected state to the corresponding value of the non-connected state; the RRC protocol layer 21
  • the startup wait timer is: After the RRC protocol layer 21 sends a message that the connection has been released to the NAS protocol layer 22, the waiting timer of the mobile terminal is triggered to start timing; the waiting time of the waiting timer is 60 ms.

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

Description

一种消息的处理方法及系统 技术领域
本发明涉及移动通信领 i或的长期演进 ( LTE, Long Term Evolution ) 系 统, 尤其涉及一种消息的处理方法及系统。 背景技术
LTE的分组系统由演进的陆地无线接入网 ( EUTRAN , Evolved UMTS Terrestrial Radio Access Network )和核心网构成。 在 EUTRAN中, 基站设 备为演进的基站 (eNB, evolved Node-B ), 主要负责无线通信、 无线通信 的管理及移动性上下文的管理。 LTE系统中, 移动终端与 eNB之间通信使 用无线资源控制 (RRC, Radio Resource Control )协议, 在 RRC协议层之 上是非接入层 ( NAS, Non Access Stratum )协议, NAS协议为移动终端与 核心网的交互协议。
根据移动终端与 eNB之间是否存在连接,移动终端的 RRC协议层具有 连接态和空闲态, 当移动终端与 eNB之间建立了通信链路,那么 RRC协议 层处于连接态, 如果移动终端与 eNB之间建立的通信链路被释放, 即 eNB 释放了与移动终端相关的各种资源, 那么 RRC协议层处于空闲态。 每当移 动终端与 eNB之间的通信链路的状态发生变化时, RRC协议层都需要通知 NAS协议层; 当 RRC协议层处于连接态时, NAS协议层也处于连接态, 当 RRC协议层处于空闲态时, NAS协议层处于非连接态; NAS协议层在 不同状态时发送的 NAS消息是不一样的, 当 NAS协议层处于连接态时, 如果需要新建业务, NAS协议层发送业务建立请求的 NAS消息给核心网, 当 NAS协议层处于非连接态时, NAS协议层需要先发起连接建立请求的 NAS消息给核心网, 由核心网发起连接建立流程, 当移动终端与 eNB之间 的通信链路建立好之后才能发送业务建立请求的 NAS消息给核心网。
现有技术中, 当 RRC协议层收到 eNB发送的连接释放消息后, 为了等 待移动终端的物理层完成一些必要的处理, 例如空口消息的回复等, RRC 协议层需要在 60ms之后再通知物理层释放连接以及通知 NAS协议层连接 已释放。 在上述过程中, 存在一个问题, 因为 RRC协议层在连接释放后没 有立即通知 NAS协议层, 因此 NAS协议层认为自身依然处于连接态, 所 以在 RRC协议层收到连接释放消息后的等待过程中, 如果 NAS协议层需 要发起新业务, 会发送业务请求消息给 RRC协议层, RRC协议层不解析 NAS协议层消息, 因此 RRC协议层对收到的 NAS协议层发送的业务请求 消息会做出以下两种处理: 第一种, RRC 协议层将业务请求消息转发给 eNB, 此时 eNB有可能已经释放了连接, 因此导致业务请求消息转发失败; 第二种, RRC协议层在收到 NAS协议层发送的业务请求消息后, 将该消息 緩存, 等待连接释放后并重新建立移动终端与 eNB之间的连接后, 将该消 息通过 eNB发送给核心网, 这个消息虽然可以传递到核心网, 但是由于此 时核心网与 NAS协议层之间的连接还没有建立, 所以核心网等待的消息应 该是连接建立请求消息, 因此核心网也不能正确处理业务请求消息, 会导 致业务请求消息处理的失败。 发明内容
有鉴于此, 本发明的主要目的在于提供一种消息的处理方法及系统, 避免了 RRC协议层在等待通信链路的连接释放过程中, NAS消息的处理失 败的问题。
为达到上述目的, 本发明的技术方案是这样实现的:
本发明提供一种消息的处理方法, 包括:
当移动终端的无线资源控制 (RRC )协议层在收到连接释放消息时, 通知移动终端的非接入层(NAS )协议层连接已释放, NAS协议层由连接 态改为非连接态;
RRC协议层启动等待定时器;
等待定时器到时, RRC协议层发送连接释放消息给物理层。
上述方法中, 所述当移动终端的 RRC协议层在收到连接释放消息时, 通知 NAS协议层连接已释放之前, 该方法还包括:
演进的基站(eNB )将连接释放消息发送给移动终端。
上述方法中, 所述 eNB将连接释放消息发送给移动终端为:
核心网发送连接释放消息给 eNB, eNB将连接释放消息转发给移动终 端的 RRC协议层。
上述方法中, 所述通知移动终端的 NAS协议层连接已释放, NAS协议 层由连接态改为非连接态为:
移动终端的 RRC协议层发送连接已释放的消息给移动终端的 NAS协 议层; NAS协议层将自身的状态控制变量的值由连接态的对应值改为非连 接态的对应值。
上述方法中, 所述 RRC协议层启动等待定时器具体为:
RRC协议层在发送连接已释放的消息给 NAS协议层后,触发移动终端 的等待定时器开始计时; 所述等待定时器的等待时间是 60ms。
上述方法中,
所述 RRC协议层发送连接释放消息给物理层为: 操作系统发送消息给 RRC协议层, RRC协议层发送连接释放消息给移动终端的物理层;
该方法还包括: 物理层将移动终端中用于存储移动终端和 eNB之间的 链路相关参数的内存资源释放。
本发明还提供一种消息的处理系统, 包括: RRC协议层、 NAS协议层; 其中,
RRC协议层, 用于当收到连接释放消息时, 通知 NAS协议层连接已释 放, 并启动等待定时器; 当等待定时器到时后, 发送连接释放消息给物理 层;
NAS协议层, 用于将自身状态由连接态改为非连接态。
上述系统中, 该系统还包括:
物理层, 用于当收到 RRC协议层发送的连接释放消息时释放连接。 上述系统中, 该系统还包括:
eNB, 用于将连接释放消息发送给移动终端的 RRC协议层。
本发明提供的消息的处理方法及系统, 当移动终端的 RRC协议层收到 连接释放消息时, 先通知 NAS协议层连接已释放, 再启动等待定时器, 所 以 NAS协议层在 RRC协议层的等待时间内, 不会发送 NAS消息给 RRC 协议层, 从而避免了 RRC协议层在等待通信链路的连接释放过程中, NAS 消息的处理失败的问题。 附图说明
图 1是本发明实现消息的处理方法的流程示意图;
图 2是本发明实现消息的处理系统的结构示意图。 具体实施方式
本发明的基本思想是: 当移动终端的无线资源控制(RRC )协议层在 收到连接释放消息时, 通知移动终端的非接入层 (NAS ) 协议层连接已 释放, NAS协议层由连接态改为非连接态; RRC协议层启动等待定时器; 等待定时器到时, RRC协议层发送连接释放消息给物理层。
下面通过附图及具体实施例对本发明再做进一步的详细说明。
本发明提供一种消息的处理方法, 图 1 是本发明实现消息的处理方法 的流程示意图, 如图 1所示, 该方法包括以下步骤:
步骤 101 , eNB将连接释放消息发送给移动终端; 具体的, 当用户长时间未使用上网、 电话等业务时或关闭移动终端时, 核心网主动发送连接释放消息给 eNB , eNB在收到核心网发送的连接释放 消息后, 将连接释放消息转发给移动终端的 RRC协议层。
步骤 102,移动终端的 RRC协议层通知移动终端的 NAS协议层连接已 释放, NAS协议层由连接态改为非连接态;
具体的,当移动终端的 RRC协议层在收到 eNB发送的连接释放消息时, 发送连接已释放的消息给移动终端的 NAS协议层, 通知 NAS协议层连接 已释放; NAS协议层收到 RRC协议层发送的连接已释放的消息后, 将自身 的状态控制变量的值由连接态的对应值改为非连接态的对应值, 实现将自 身状态由连接态改为非连接态。
步骤 103 , RRC协议层启动等待定时器;
具体的, RRC协议层在发送连接已释放的消息给 NAS协议层后, 触发 移动终端的等待定时器开始计时, 其中, RRC协议中规定该等待定时器的 等待时间是 60ms。
步骤 104, 等待定时器到时, RRC协议层发送连接释放消息给物理层, 物理层释放连接;
具体的, 等待定时器是在移动终端的操作系统上运行的程序, 当等待 定时器到时后, 操作系统发送消息给 RRC协议层, 告知 RRC协议层等待 定时器已经到时; RRC协议层收到操作系统发送的消息后, 发送连接释放 消息给移动终端的物理层, 通知物理层释放连接; 物理层收到连接释放消 息后, 将移动终端中用于存储移动终端和 eNB之间的链路相关参数的内存 资源释放, 链路相关参数包括链路的频点和带宽等。
为实现上述方法, 本发明还提供一种消息的处理系统, 图 2是本发明 实现消息的处理系统的结构示意图, 如图 2所示, 该系统包括: RRC协议 层 21、 NAS协议层 22; 其中, RRC协议层 21 , 用于当收到连接释放消息时, 通知 NAS协议层 22连 接已释放; 并启动等待定时器; 当等待定时器到时后, 发送连接释放消息 给物理层 23 ;
NAS协议层 22, 用于将自身状态由连接态改为非连接态。
该系统还包括: 物理层 23 , 用于当收到 RRC协议层 21发送的连接释 放消息时释放连接。
该系统进一步还包括:
eNB24, 用于将连接释放消息发送给移动终端的 RRC协议层 21 ;
eNB24将连接释放消息发送给移动终端的 RRC协议层 21为: 核心网 发送连接释放消息给 eNB24 , eNB24 将连接释放消息转发给移动终端的 RRC协议层 21。
RRC协议层 21通知 NAS协议层 22连接已释放为: 移动终端的 RRC 协议层 21发送连接已释放的消息给移动终端的 NAS协议层 22;
NAS协议层 22将自身状态由连接态改为非连接态为: NAS协议层 22 将自身的状态控制变量的值由连接态的对应值改为非连接态的对应值; 所述 RRC协议层 21启动等待定时器为: RRC协议层 21在发送连接已 释放的消息给 NAS协议层 22后, 触发移动终端的等待定时器开始计时; 所述等待定时器的等待时间是 60ms。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围, 凡在本发明的精神和原则之内所作的任何修改、 等同替换和改进 等, 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、 一种消息的处理方法, 其特征在于, 该方法包括:
当移动终端的无线资源控制 (RRC )协议层在收到连接释放消息时, 通知移动终端的非接入层(NAS )协议层连接已释放, NAS协议层由连接 态改为非连接态;
RRC协议层启动等待定时器;
等待定时器到时, RRC协议层发送连接释放消息给物理层。
2、 根据权利要求 1所述的方法, 其特征在于, 所述当移动终端的 RRC 协议层在收到连接释放消息时, 通知 NAS协议层连接已释放之前, 该方法 还包括:
演进的基站(eNB )将连接释放消息发送给移动终端。
3、根据权利要求 2所述的方法, 其特征在于, 所述 eNB将连接释放消 息发送给移动终端为:
核心网发送连接释放消息给 eNB, eNB将连接释放消息转发给移动终 端的 RRC协议层。
4、 根据权利要求 1 所述的方法, 其特征在于, 所述通知移动终端的 NAS协议层连接已释放, NAS协议层由连接态改为非连接态为:
移动终端的 RRC协议层发送连接已释放的消息给移动终端的 NAS协 议层; NAS协议层将自身的状态控制变量的值由连接态的对应值改为非连 接态的对应值。
5、 根据权利要求 1所述的方法, 其特征在于, 所述 RRC协议层启动 等待定时器为:
RRC协议层在发送连接已释放的消息给 NAS协议层后,触发移动终端 的等待定时器开始计时; 所述等待定时器的等待时间是 60ms。
6、 根据权利要求 1所述的方法, 其特征在于, 所述 RRC协议层发送连接释放消息给物理层为: 操作系统发送消息给 RRC协议层, RRC协议层发送连接释放消息给移动终端的物理层;
该方法还包括: 物理层将移动终端中用于存储移动终端和 eNB之间的 链路相关参数的内存资源释放。
7、 一种消息的处理系统, 其特征在于, 该系统包括: RRC 协议层、
NAS协议层; 其中,
RRC协议层, 用于当收到连接释放消息时, 通知 NAS协议层连接已释 放, 并启动等待定时器; 当等待定时器到时后, 发送连接释放消息给物理 层;
NAS协议层, 用于将自身状态由连接态改为非连接态。
8、 根据权利要求 7所述的系统, 其特征在于, 该系统还包括: 物理层, 用于当收到 RRC协议层发送的连接释放消息时释放连接。
9、 根据权利要求 7或 8所述的系统, 其特征在于, 该系统还包括: eNB, 用于将连接释放消息发送给移动终端的 RRC协议层。
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