WO2009076807A1 - 长期演进计划***中一种通知终端***消息更新的方法 - Google Patents

长期演进计划***中一种通知终端***消息更新的方法 Download PDF

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Publication number
WO2009076807A1
WO2009076807A1 PCT/CN2008/071852 CN2008071852W WO2009076807A1 WO 2009076807 A1 WO2009076807 A1 WO 2009076807A1 CN 2008071852 W CN2008071852 W CN 2008071852W WO 2009076807 A1 WO2009076807 A1 WO 2009076807A1
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Prior art keywords
system message
period
terminal
message
modification period
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PCT/CN2008/071852
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English (en)
French (fr)
Inventor
Zhongda Du
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Zte Corporation
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Priority to US12/746,511 priority Critical patent/US8200253B2/en
Priority to EP08783845.4A priority patent/EP2211506B1/en
Publication of WO2009076807A1 publication Critical patent/WO2009076807A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method for informing a terminal system to update a message after a system message is updated in a Long Term Evolution (LTE) system.
  • LTE Long Term Evolution
  • the LTE Long Term Evolution (LTE) is a system for responding to future communication needs.
  • the LTE system is mainly composed of a terminal, a base station, and a core network.
  • the network composed of base stations is called a "Radio Access Network (RAN), and is responsible for access layer transactions, such as management of radio resources.
  • RAN Radio Access Network
  • Each base station can be connected to one or more core network nodes (Core Network, abbreviated as CN).
  • the core network is responsible for non-access layer transactions, such as location updates, and is the anchor point for the user plane.
  • a terminal is a device that can communicate with a cellular wireless communication network, such as a mobile phone or a laptop.
  • One basic unit of system time in an LTE system is a radio frame.
  • the length of the radio frame is 10 milliseconds (ms), and one radio frame includes 10 subframes, each subframe being 1 millisecond.
  • System messages are messages used to broadcast system configuration parameters.
  • MIB Master Information Block
  • SU-1 scheduling information block 1
  • SU-X other scheduling information blocks
  • the MIB includes some physical layer parameters and a system frame number SFN;
  • SU-1 includes scheduling information of other SU-Xs, a list of carrier numbers, PLMN LIST, cell identification, access control parameters, system value tags, and the like;
  • Each SU-X may include one or more system information blocks (SIBs), that is, SIBs mapped to the same SU-X have the same scheduling rule in the time domain; when the network starts broadcasting new ones
  • SIBs system information blocks
  • the MIB is broadcast on the system broadcast channel PBCH, and the resource configuration of the PBCH in the time domain and the frequency domain is static.
  • the scheduling period of the MIB is fixed, that is, its content is repeated every 40 ms.
  • the MIB is always on the #0 subframe of the radio frame in which it is located.
  • SU-1 and SU-X are carried by the downlink shared channel.
  • the scheduling period of SU-1 is also fixed, that is, it is scheduled every 80ms, and it is allowed to retransmit up to 4 times in 80ms.
  • SU-1 occupies one subframe, and the position of the subframe on the radio frame where SU-1 is located is also stable.
  • System message blocks broadcast on one subframe are carried on the radio resources of the system, and the control parameters related to the radio resources, such as modulation and coding parameters MCS, transmission format, etc., are provided by the following dedicated control channel PDCCH, that is, A method of dynamic scheduling.
  • the order in which the user terminal UE reads the system message is that the MIB is read first, and then the content of the SU-1 is read.
  • the user terminal of the SU-1 can obtain scheduling information of other SU-Xs, and then read these SU-Xs.
  • RRC radio access layer
  • the network will notify the terminal by a paging message, and then the terminal will be triggered to re-read the contents of the system message.
  • the period in which the terminal receives the paging message in the RRC-IDLE state in the present invention is referred to as the DRX (Discontinuous Reception) period.
  • the system message update notification message in Figure 2 is a paging message.
  • the terminal Regardless of the state of the terminal, if the system frame number of the system message update notification message received by the terminal is SFN, the terminal will consider that the system message starts to update after the N-SFN%N frame, and this N corresponds to the system message.
  • the length of the modification period indicates the number of frames occupied by the modification period.
  • the technical problem to be solved by the present invention is to provide a method for system message notification in an LTE long-term evolution planning system. After a system message changes, the network side notifies the terminal that the system message has changed, so that the terminal receives the updated information in time. system information.
  • the present invention provides a notification end in a long term evolution planning system.
  • the method for updating the end system message is used to notify the terminal in time after the system message is changed, and the network side notifies the terminal system of the message change within the system message modification period after the system message is changed, where: the length of the system message modification period For a non-continuous reception of an integer multiple of the DRX cycle, the discontinuous reception DRX cycle is a period in which the terminal in the idle state receives the paging message.
  • the foregoing method may further have the following feature: the system message modification period is notified to the terminal by the system network side through a system message broadcast.
  • the foregoing method may further have the following feature: the discontinuous reception DRX cycle is notified to the terminal by the system network side through a system message broadcast.
  • the foregoing method may further have the following feature: when the content of the system message changes, the network side notifies the terminal by using a paging message in the system message modification period.
  • the foregoing method may further have the following feature: the system message modification period is a system frame cycle period.
  • the foregoing method may further have the following feature, where the system message modification period is
  • the system frame number of the boundary of the system message modification period is divisible by 1024.
  • each terminal in the RRC_IDLE state can be guaranteed to receive at least one paging message including the system message update information, and in the cycle. If the paging message is retransmitted multiple times, the reliability of receiving the paging message by the terminal can be improved.
  • FIG. 1 is a schematic diagram of a network structure of an LTE Long Term Evolution Plan system
  • FIG. 2 is a schematic diagram of an existing system message update notification in the background art
  • FIG. 3 is a schematic diagram of a system message modification period being twice the DRX cycle in the embodiment of the present invention
  • FIG. 4 is a schematic diagram of a system message modification period being 1 times a DRX cycle in the embodiment of the present invention
  • FIG. 5 is a system message according to an embodiment of the present invention
  • the modification period is a schematic diagram of a system frame period.
  • the network side After the system message is changed, the network side notifies the terminal system of the message change in the system message modification period, where the length of the system message modification period is an integer multiple of the discontinuous reception DRX period, and the discontinuous reception DRX period is the terminal in the idle state. The period in which the paging message is received.
  • the system message modification period is notified to the terminal by the system network side through system message broadcast.
  • the discontinuous reception DRX cycle is notified to the terminal by the system network side through system message broadcast.
  • Embodiment 1 An embodiment in which the system message modification period is twice the DRX cycle.
  • the system message modification period is defined as 640 milliseconds (64 radio frames), which is equal to twice the DRX period in the RRC-IDLE state.
  • Embodiment 2 An embodiment in which the system message modification period is one time of the DRX cycle.
  • the system message modification period is also specified as 640 milliseconds, that is, equal to the DRX period in the RRC-IDLE state.
  • the base station will send 8 system messages to inform the end system that the message has changed.
  • Embodiment 3 The system message modification period is 10.24 seconds, that is, one system frame cycle period.
  • the system message modification period is specified as 10240 milliseconds, that is, equal to RRC-IDLE. 16 times the DRX cycle in the state.
  • the present invention is applicable to the field of mobile communication technologies, especially in the Long Term Evolution Plan LTE system in the 3rd Generation Partnership Project 3GPP, for notifying the terminal system message change after the system message is changed.
  • the application of the present invention can ensure that each terminal in an idle state receives at least one paging message including system message update information.

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

Description

长期演进计划***中一种通知终端***消息更新的方法
技术领域
本发明涉及通信技术领域， 尤其涉及一种在长期演进计划 （Long Term Evolution, 简称 LTE ) ***中***消息更新以后， 网络侧通知终端***消息 更新的方法。
背景技术
3GPP ( Third Generation Partnership Project, 第三代合作伙伴计划） LTE 长期演进计划是应对未来通信需求的一种***， 如图 1所示， LTE***主要 由终端、基站和核心网组成。其中，由基站组成的网络称为 "无线接入网（Radio Access Network, 缩写为 RAN ) " , 负责接入层事务， 比如无线资源的管理。 基站之间根据实际情况可以存在物理或者逻辑上的连接， 比如图 1 中的基站 1和基站 2或者基站 3。每个基站可以和一个或者一个以上的核心网节点（ Core Network, 缩写为 CN )连接。 核心网负责非接入层事务， 比如位置更新等， 并且是用户面的锚点。 终端是指可以和蜂窝无线通讯网络通讯的各种设备， 比如移动电话或者笔记本电脑等。
LTE***中***时间的一个基本单元是无线帧。无线帧的长度是 10毫秒 ( ms ) , —个无线帧包括 10个子帧， 每个子帧 1毫秒。 ***消息是用来广播 ***配置参数的消息。 在 LTE中按照功能划分， 主要有主***消息块（简称 MIB, Master Information Block ) 、 调度信息块 1 (简称 SU-1 ) 、 其他的调度 信息块（在本文中简称 SU-X ) 。 其中：
MIB包括部分物理层参数、 ***帧号 SFN;
SU-1包括其他 SU-X的调度信息、运营商号码列表 PLMN LIST, 小区标 识、 接入控制参数和***消息标记（value tag )等等；
每个 SU-X上可能包括 1个或者多个***信息块 SIB ( System Information Block ) , 也就是说映射到相同 SU-X的 SIB在时域上有相同的调度规律； 当网络开始广播新的***消息的时候， SU-1上的 value tag会发生更新。 MIB在***广播信道 PBCH上广播， PBCH在时域和频域上的资源配置 是静态的。 MIB的调度周期是固定的， 即每 40ms其内容重复一次。 MIB总 是在所在的无线帧的 # 0子帧上。 SU-1和 SU-X是由下行的共享信道来承载 的。 SU-1 的调度周期也是固定的， 即每 80ms调度一次， 并且允许在 80ms 内最多重发 4次， SU-1 占用一个子帧， 该子帧在 SU-1所在的无线帧上的位 置也是固定的。 在一个子帧上广播的***消息块承载在***的无线资源上， 这些无线资源相关的控制参数， 比如调制和编码参数 MCS、 传输格式等等由 跟随的专用控制信道 PDCCH来提供， 即釆用了动态调度的方法。
用户终端 UE读取***消息的顺序是，先读取 MIB ,再读取 SU-1的内容， 从 SU-1中用户终端可以获得其他 SU-X的调度信息， 从而再读取这些 SU-X 中的***消息块 SIB的内容。
在 LTE中在无线接入层（RRC )上有两个状态： 空闲状态（RRC_IDLE ) 和连接状态 （ RRC_CON ECTED ) ：
如果***消息的内容发生了改变， 网络会通过寻呼消息来通知终端， 然 后终端会被触发来重新读取***消息的内容。 为了描述方便， 本发明中把终 端在 RRC— IDLE 状态下接收寻呼消息的周期称为 DRX (非连续接收， Discontinuous Reception )周期。
图 2中的***消息更新通知消息是寻呼消息。
不管终端处于哪种状态， 4叚设终端收到***的***消息更新通知消息的 ***帧号是 SFN, 那么终端会认为***消息在 N-SFN%N帧以后开始更新， 这个 N对应到***消息修改周期的长度，即表示该修改周期所占用的帧数目。
目前的 LTE***中， 还没有具体规定如何定义***消息修改周期。 发明内容
本发明所要解决的技术问题在于， 提供一种 LTE长期演进计划***中系 统消息通知的方法， 在***消息发生变化后， 网络侧通知终端所述***消息 已发生变化， 以便终端及时接收更新后的***消息。
为了解决上述技术问题， 本发明提供了一种长期演进计划***中通知终 端***消息更新的方法， 用于在***消息改变后网络侧及时通知终端， 网络 侧在***消息改变后， 在***消息修改周期内通知终端***消息改变， 其中： 所述***消息修改周期的长度为非连续接收 DRX周期的整数倍，所述非 连续接收 DRX周期是处于空闲状态下的终端接收寻呼消息的周期。
进一步的， 上述方法还可具有以下特点， 所述***消息修改周期由*** 网络侧通过***消息广播通知给终端。
进一步的，上述方法还可具有以下特点， 所述非连续接收 DRX周期由系 统网络侧通过***消息广播通知给终端。
进一步的， 上述方法还可具有以下特点， 在***消息的内容发生改变时， 网络侧在所述***消息修改周期内通过寻呼消息来通知终端。
进一步的， 上述方法还可具有以下特点， 所述***消息修改周期为一个 ***帧循环周期。
进一步的， 上述方法还可具有以下特点， 所述***消息修改周期为
10240ms, 所述***消息修改周期的边界的***帧号被 1024整除。
应用本发明所述的方法，由于规定***消息修改周期是 DRX周期的整数 倍， 可以保证每个处于 RRC— IDLE状态的终端至少接收到一次包括***消息 更新信息的寻呼消息， 而在该周期内多次重发寻呼消息， 则可以提高终端接 收寻呼消息的可靠性。 附图概述
图 1是 LTE长期演进计划***的网络结构示意图；
图 2是背景技术中现有***消息更新通知的示意图；
图 3是本发明实施例中***消息修改周期为 DRX周期 2倍的示意图； 图 4是本发明实施例中***消息修改周期为 DRX周期 1倍的示意图； 图 5是本发明实施例中***消息修改周期为一个***帧周期的示意图。 本发明的较佳实施方式
下面结合本发明较佳实施例及附图对本发明技术方案做详细说明。
网络侧在***消息改变后， 在***消息修改周期内通知终端***消息改 变， 其中， ***消息修改周期的长度为非连续接收 DRX周期的整数倍， 非连 续接收 DRX周期是处于空闲状态下的终端接收寻呼消息的周期。
***消息修改周期由***网络侧通过***消息广播通知给终端。 非连续 接收 DRX周期由***网络侧通过***消息广播通知给终端。
实施例 1： ***消息修改周期为 DRX周期 2倍的实施例。
参考图 3 ,假设终端在 RRC— IDLE状态下 DRX的周期是 320毫秒， 那么 ***消息修改周期规定为 640毫秒（ 64个无线帧）， 即等于 RRC— IDLE状态 下 DRX周期的 2倍。 另外， 规定***消息修改周期的边界满足 SFN%64=0 的条件， 即***消息修改周期的边界的***帧号被 64整除， ***消息修改周 期的边界的***帧号指***消息修改周期的起点和终点对应的***帧号。
4叚设终端在***帧号 SFN=335帧的地方收到了***消息更新通知消息， 那么终端会在 48帧以后， 开始读取更新以后的***消息内容。
实施例 2: ***消息修改周期为 DRX周期的 1倍的实施例。
参考图 4, 假设终端在 RRC— IDLE状态下 DRX的周期是 640毫秒（即 64个无线帧），那么***消息修改周期也规定为 640毫秒，即等于 RRC— IDLE 状态下 DRX的周期。 另外， 规定***消息修改周期的边界满足 SFN%64=0 的条件， 即要求帧号能够被 64整除， 余数为 0。 假设在 DRX周期内有 8次 寻呼机会，那么基站会发送 8次***消息用来通知终端***消息发生了改变。
实施例 3: ***消息修改周期为 10.24秒， 即一个***帧循环周期。
参考图 5, 假设终端在 RRC— IDLE状态下 DRX的周期是 640毫秒（即 64个无线帧），那么***消息修改周期规定为 10240毫秒，即等于 RRC— IDLE 状态下 DRX 周期的 16 倍。 另外， 规定***消息修改周期的边界满足 SFN%1024=0的条件， 即一个***帧循环周期。
工业实用性
本发明适用于移动通信技术领域， 尤其是在第三代伙伴计划 3GPP 中的 长期演进计划 LTE***中，用于在***消息改变后，通知终端***消息改变。 应用本发明可以保证每个处于空闲状态的终端至少接收到一次包括***消息 更新信息的寻呼消息。

Claims

权 利 要 求 书
1、 一种长期演进计划***中通知终端***消息更新的方法，用于在系 统消息改变后网络侧及时通知终端， 其特征在于：
网络侧在***消息改变后， 在***消息修改周期内通知终端***消息改 变， 其中：
所述***消息修改周期的长度为非连续接收 DRX周期的整数倍，所述非 连续接收 DRX周期是处于空闲状态下的终端接收寻呼消息的周期。
2、 如权利要求 1所述的方法， 其特征在于：
所述***消息修改周期由***网络侧通过***消息广播通知给终端。
3、 如权利要求 1所述的方法， 其特征在于：
所述非连续接收 DRX周期由***网络侧通过***消息广播通知给终端。
4、 如权利要求 1或 2所述的方法， 其特征在于：
在***消息的内容发生改变时， 网络侧在所述***消息修改周期内通过 寻呼消息来通知终端。
5、 如权利要求 1或 2所述的方法，其特征在于， 所述***消息修改周 期为一个***帧循环周期。
6、 如权利要求 5所述的方法，其特征在于， 所述***消息修改周期为 10240ms, 所述***消息修改周期的边界的***帧号被 1024整除。
PCT/CN2008/071852 2007-12-12 2008-08-01 长期演进计划***中一种通知终端***消息更新的方法 WO2009076807A1 (zh)

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EP08783845.4A EP2211506B1 (en) 2007-12-12 2008-08-01 Method for notifying ue about updating of system information in long term evolution planning system

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