WO2011076062A1 - Base station and synchronization processing method of base station in hierarchical network - Google Patents
Base station and synchronization processing method of base station in hierarchical network Download PDFInfo
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- WO2011076062A1 WO2011076062A1 PCT/CN2010/079502 CN2010079502W WO2011076062A1 WO 2011076062 A1 WO2011076062 A1 WO 2011076062A1 CN 2010079502 W CN2010079502 W CN 2010079502W WO 2011076062 A1 WO2011076062 A1 WO 2011076062A1
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- H—ELECTRICITY
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Abstract
The present invention discloses a base station and a synchronization processing method of the base station in a hierarchical network, wherein the method includes: a base station measures the quality of the cell-specific reference signals of a present synchronization source base station during the process of maintaining synchronization, and judges whether the base station is at the synchronization loss state according to the quality of the signals; if the base station is judged to be at the synchronization loss state, the base station re-selects a synchronization source to synchronize. By using the schemes of the present invention, the base station can detect the synchronization loss state promptly and ensure that it is at the synchronization state, and essential supplement is provided for the synchronization scheme in the hierarchical network.
Description
一种分层网络中基站的同歩处理方法及基站 相关申请的交叉引用 Method for processing peers of base stations in hierarchical network and base station Cross-reference to related applications
本申请要求于 2009 年 12 月 24 日递交中国专利局的申请 No. 200910243502.6的优先权， 该申请的全部内容通过引用并入本文。 技术领域 The present application claims priority to the Chinese Patent Office, No. 2009 1024,350, filed on Dec. 24, 2009, the entire disclosure of which is hereby incorporated by reference. Technical field
本发明涉及移动通信技术， 特别涉及一种分层网络中基站的同步处理方 法及基站。 背景技术 The present invention relates to mobile communication technologies, and in particular, to a method and a base station for synchronizing a base station in a layered network. Background technique
在移动通信网络中， 随着日益增长的对数据速率以及覆盖的要求， 传统 的用宏基站提供接入的方案已经不能满足要求了， 而采用小区分裂， 以及在 热点地区或者室内部署一些低功率的基站 （例如 HeNB PeNB/FeNB/Relay Node, 家庭式基站 /微微蜂窝式基站 /毫微微蜂窝式基站 /中继式基站） 以提供 接入的方案能够很好地满足这样的要求。 这种低功率的基站是一种应用于家 庭室内环境、 办公环境、 或其它小覆盖环境下的基站设备， 部署这种低功率 的基站使得运营商能够提供更高数据速率、 更低成本的有吸引力的业务。 In the mobile communication network, with the increasing requirements for data rate and coverage, the traditional scheme of providing access by the macro base station can no longer meet the requirements, and the cell splitting is adopted, and some low power is deployed in the hotspot area or indoors. The base station (e.g., HeNB PeNB/FeNB/Relay Node, Home Base Station/Pico Cell Base Station/Femto Cellular Base Station/Relay Base Station) can well meet such requirements by providing access. The low-power base station is a base station device used in a home indoor environment, an office environment, or other small coverage environments. The deployment of such a low-power base station enables operators to provide higher data rates and lower cost. Attractive business.
低功率基站的引入会对现有宏基站的通信造成干扰， 当低功率基站与宏 基站不同步时， 这种干扰将尤其严重， 因此， 需要解决低功率基站与宏基站 同步的问题， The introduction of a low-power base station may cause interference to the communication of the existing macro base station. When the low-power base station and the macro base station are not synchronized, such interference will be particularly serious. Therefore, it is necessary to solve the problem of synchronization between the low-power base station and the macro base station.
在 3GPP R8 (版本 8 ) 系统中， 对于小于 3Km的小区半径， 基站间同步 的精度要求为 3μ3， 对于大于 3Km 的小区半径， 基站间同步的精度要求为 10μδ。 在 3GPP R9/10 (版本 9/10 ) 系统中， 由于多种新技术的应用， 保持基 站间的同步显得更为重要， 在目前的研究中， 建议采用基站间相互监听的方 案实现同步： 即某个基站可以通过监听另外一个已同步基站的 CRS ( Cell-specific reference signals, 小区专属导频信号）来保持同步。 然而使用
这种方案要考虑到干扰的问题， 图 1 为分层系统基站内同步方案的示意图， 如图所示： 当 eNBl在监听 eNBO的同步信号时， 如果此时 eNB2在进行数据 的传输， 那么 eNBl的同步信号接收将会受到干扰。 In 3GPP R8 (Release 8) system, for the cell radius is less than 3Km, inter-base station synchronization accuracy is 3μ3, for a cell radius larger than 3Km, the inter-base station synchronization accuracy is 10μ δ. In the 3GPP R9/10 (version 9/10) system, it is more important to maintain synchronization between base stations due to the application of multiple new technologies. In the current research, it is recommended to use the scheme of mutual monitoring between base stations to achieve synchronization: A base station can maintain synchronization by listening to CRS (Cell-specific reference signals) of another synchronized base station. However use This scheme should take into account the problem of interference. Figure 1 is a schematic diagram of the intra-base station synchronization scheme of the hierarchical system. As shown in the figure: When eNB1 is listening to the synchronization signal of eNB0, if eNB2 is transmitting data at this time, then eNBl The synchronization signal reception will be disturbed.
考虑到这种情况的出现， 提出用一种静默的方式来解决千扰问题： 即当 eNBl进行同步信号监听的时候， eNB2不会进行数据的传输，以避免对于 eNBl 的干扰。 然而这种方案可能需要基站之间的相互协调。 In view of the occurrence of this situation, it is proposed to solve the interference problem in a silent manner: that is, when eNB1 performs synchronization signal monitoring, eNB2 does not perform data transmission to avoid interference with eNB1. However, such a scheme may require mutual coordination between base stations.
另外， 考虑到传播环境的影响， 有些低功率基站 （例如， 家庭式基站） 可能接收不到可用的来自宏基站的同步信号， 因此还提出可以利用多跳的同 步方案。 图 2为多跳的同步（Multi-hop synchronization )方案的示意图， 如图 所示： HeNBl 是与宏基站（本例中称为同步基站， Sync eNB ) 同步的， 而 HeNB2可以通过 HeNBl来进行同步。 定义图中 Sync eNB (同步 eNB ) 为层 0， 利用层 0的基站进行同步的基站 HeNBl为层 1， 利用层 1的基站 HeNBl 进行同步的基站 HeNB2为层 2， 依次类推。 In addition, some low-power base stations (e.g., home base stations) may not receive available synchronization signals from macro base stations in consideration of the influence of the propagation environment, and therefore a synchronization scheme that can utilize multi-hops has also been proposed. 2 is a schematic diagram of a multi-hop synchronization scheme, as shown in the figure: HeNB1 is synchronized with a macro base station (referred to as a synchronization base station, Sync eNB in this example), and HeNB2 can perform synchronization through HeNB1. . In the definition map, the Sync eNB (synchronous eNB) is layer 0, the base station HeNB1 that performs synchronization using the base station of layer 0 is layer 1, and the base station HeNB2 that performs synchronization using the base station HeNB1 of layer 1 is layer 2, and so on.
从避免干扰的角度出发， 在较低的层进行同步监听的时候， 下一层的基 站要停止数据的传输， 以避免对其产生千扰。 因此， 可以把每一层的基站需 要静默的子帧配成层数的函数， 这样， 位于同一层的基站在相同的子帧位置 上监听上一层基站的同步信息， 在监听上一层的基站的同步信息的子帧位置 处， 下一层的基站需要进行静默。 因此， 每一层的基站需要发送关于层的信 息， 目前， 基站要发送该基站的层数（ 2比特）和是否同步的信息（ 1比特）。 这些信息可以： From the perspective of avoiding interference, when the lower layer performs synchronous monitoring, the base station of the next layer should stop the transmission of data to avoid interference. Therefore, the base station of each layer needs to be configured as a function of the number of layers, so that the base stations located in the same layer monitor the synchronization information of the upper base station in the same subframe position, and listen to the upper layer. At the subframe position of the synchronization information of the base station, the base station of the next layer needs to perform silence. Therefore, the base station of each layer needs to transmit information about the layer. Currently, the base station transmits the number of layers (2 bits) of the base station and whether or not the information (1 bit) is synchronized. This information can be:
在 MIB ( Master Information Block, 主控制信息块） 中传输； 和 /或 在 SIB-1 ( System Information Block-1 , 系统信息块 1 ) 中传送。 Transfer in the MIB (Master Information Block); and / or in SIB-1 (System Information Block-1).
而且， 基站可以通过配置 MBSFN ( MBSFN Multicast Broadcast Single Frequency Network, 多播 /广播单频网络）子帧， 用以在配置的 MBSFN子帧 上进行同步监听。 Moreover, the base station can configure the MBSFN (MBSFN Multicast Broadcast Single Frequency Network) subframe to perform synchronous monitoring on the configured MBSFN subframe.
网管下发关于每一层的同步子帧的配置。 为了避免对于用户的影响， 这 些同步子帧可以通过配置 MBSFN的方式来实现。
现有技术的不足在于： 考虑到在分层网络中， 基站的活动性将会是很随 机的， 因此在使用基站间监听的方案进行同步时， 很可能出现监听的基站关 闭或是其它原因导致无法监听同步信息的情况。 The NMS sends the configuration of the synchronization subframes for each layer. In order to avoid the impact on users, these synchronization subframes can be implemented by configuring MBSFN. The disadvantages of the prior art are: Considering that in a layered network, the activity of the base station will be very random, so when synchronizing using the scheme of inter-base station interception, it is likely that the base station that is listening is turned off or other causes are caused. Unable to listen to synchronization information.
因此， 基站需要有一定的机制去保证自己处于同步的状态。 发明内容 Therefore, the base station needs to have a mechanism to ensure that it is in a synchronized state. Summary of the invention
本发明实施例所要解决的技术问题在于提供一种分层网络中基站的同步 处理方法及基站。 The technical problem to be solved by the embodiments of the present invention is to provide a synchronization processing method and a base station for a base station in a layered network.
本发明实施例中提供了一种分层网络中基站的同步处理方法， 包括： 基站在保持同步过程中， 测量当前同步源基站的小区专属导频信号 CRS 的信号盾量； The embodiment of the present invention provides a method for synchronizing a base station in a layered network, including: the base station measuring a signal shield of a cell-specific pilot signal CRS of a current synchronization source base station while maintaining synchronization;
基站根据所述信号质量判断该基站是否处于失步的状态； Determining, by the base station, whether the base station is in an out-of-synchronization state according to the signal quality;
如果判断出处于失步的状态， 则基站重新选取同步源后进行同步。 If it is determined that the state is out of synchronization, the base station reselects the synchronization source and performs synchronization.
本发明实施例中提供了一种基站， 包括： A base station is provided in the embodiment of the present invention, including:
测量模块， 用于在保持基站的同步的过程中， 测量当前同步源基站的 CRS的信号质量； a measuring module, configured to measure a signal quality of a CRS of a current synchronization source base station while maintaining synchronization of the base station;
判断模块， 用于根据所迷信号质量判断该基站是否处于失步的状态； 同步模块， 用于在判断出处于失步的状态时， 重新选取同步源后进行同 步。 a judging module, configured to determine, according to the signal quality, whether the base station is in an out-of-synchronization state; and a synchronization module, configured to re-select the synchronization source and perform synchronization when determining that the synchronization is in an out-of-synchronization state.
在本发明一个方案的实施过程中， 基站在保持同步过程中， 会去测量当 前同步源基站的 CRS的信号质量； 并且根据测量的信号质量来判断该基站是 否处于失步的状态； 如果判断出处于失步的状态时， 则重新选取同步源后进 行同步。 During the implementation of an aspect of the present invention, the base station measures the signal quality of the CRS of the current synchronization source base station while maintaining synchronization; and determines whether the base station is in an out-of-synchronization state according to the measured signal quality; When the state is out of synchronization, the synchronization source is reselected and then synchronized.
在本发明实施例提供的技术方案中， 由于基站通过测量所监听的同步基 站的 CRS的信号质量来检测自己是否处于失步的状态， 并在检测出处于失步 的状态时重新选取同步基站进行同步， 因此能够及时的发现失步状态， 并采 取措施保证自己处于同步的状态， 为分层网络中同步方案提供了必要的补
N2010/079502 充， 从而能够保证整个分层网络中基站的同步。 附图说明 In the technical solution provided by the embodiment of the present invention, the base station detects whether the user is in an out-of-synchronization state by measuring the signal quality of the CRS of the monitored synchronous base station, and reselects the synchronous base station when detecting the out-of-synchronization state. Synchronization, so it is possible to find the out-of-synchronization state in time, and take measures to ensure that they are in a synchronized state, providing the necessary supplement for the synchronization scheme in the layered network. The N2010/079502 is charged to ensure synchronization of the base stations in the entire hierarchical network. DRAWINGS
图 1为背景技术中分层系统基站间同步方案的示意图； 1 is a schematic diagram of a synchronization scheme between base stations of a layered system in the background art;
图 2为背景技术中多跳的同步方案的示意图； 2 is a schematic diagram of a multi-hop synchronization scheme in the background art;
图 3为本发明实施例中分层网络中基站的同步处理方法实施流程示意图； 图 4 为本发明实施例中应用于分层网络的失步检测处理实施流程示意 图； 3 is a schematic flowchart of a method for implementing synchronization processing of a base station in a layered network according to an embodiment of the present invention; FIG. 4 is a schematic flowchart of an implementation process of out-of-synchronization detection processing applied to a layered network according to an embodiment of the present invention;
图 5为本发明实施例中基站的结构示意图。 具体实施方式 FIG. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention. detailed description
本申诸的发明人在发明过程中注意到， 基站需要有一定的机制去保证自 己处于同步的状态， 因此基站需要及时地发现失步状态， 本发明实施例提供 的技术方案中， 基站将通过测量所监听的同步基站的 CRS的信号盾量来检测 自己是否处于失步的状态、 并在检测出处于失步的状态时重新选取同步基站 进行同步， 以保证整个分层网络中基站的同步。 下面结合附图对本发明的具 体实施方式进行说明， The inventor of the present invention noticed in the process of the invention that the base station needs to have a certain mechanism to ensure that it is in a synchronized state. Therefore, the base station needs to discover the out-of-synchronization state in time. In the technical solution provided by the embodiment of the present invention, the base station will pass The signal shield of the CRS of the synchronized base station is monitored to detect whether it is in an out-of-synchronization state, and when the out-of-synchronization state is detected, the synchronization base station is reselected for synchronization to ensure synchronization of the base stations in the entire hierarchical network. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a specific embodiment of the present invention will be described with reference to the accompanying drawings.
图 3为分层网络中基站的同步处理方法一的实施流程示意图， 如图所示， 同步处理过程可以包括： FIG. 3 is a schematic flowchart of an implementation process of a method for synchronizing a base station in a layered network. As shown in the figure, the synchronization process may include:
步骤 301、基站在保持同步过程中， 测量当前同步源基站的小区专属导频 信号 CRS的信号质量； Step 301: The base station measures the signal quality of the cell-specific pilot signal CRS of the current synchronization source base station while maintaining synchronization;
步骤 302、 基站根据所述信号质量判断该基站是否处于失步的状态； 步骤 303、 如果判断处于失步的状态， 则基站重新选取同步源后进行同 步。 Step 302: The base station determines, according to the signal quality, whether the base station is in an out-of-synchronization state. Step 303: If it is determined that the base station is in an out-of-synchronization state, the base station re-selects the synchronization source and performs synchronization.
实施中， 步骤 301 中， 基站在保持同步过程中， 可以根据相应的协议流 程或是通过检测当前同步源基站的 CRS信息进行同步保持。 具体的， 基站在 完成初始同步后， 可以根据相应的协议流程或是通过检测当前同步源基站的
10 079502In the implementation, in step 301, the base station may perform synchronization maintenance according to the corresponding protocol procedure or by detecting the CRS information of the current synchronization source base station during the synchronization process. Specifically, after completing the initial synchronization, the base station may detect the current synchronization source base station according to the corresponding protocol flow or 10 079502
CRS信息进行同步保持。 The CRS information is kept in synchronization.
实施中， 步骤 302中， 信号质量可以是测得的当前同步源基站的 CRS的 SINR ( Signal to Interference plus Noise Ratio, 信号与干扰和噪声比）值。 In implementation, in step 302, the signal quality may be a measured SINR (Signal to Interference plus Noise Ratio) value of the CRS of the current synchronization source base station.
若在上述实施过程中， 以低功率基站为例进行说明， 则低功率基站在步 骤 301 检测当前同步源基站的 CRS 时， 可以测量其接收到的信号的 SINR 值。 If the low power base station is used as an example in the foregoing implementation process, the low power base station may measure the SINR value of the received signal when detecting the CRS of the current synchronization source base station in step 301.
实施中， 步骤 302 中， 基站根据所述信号盾量判断该基站是否处于失步 的状态， 可以包括： In the implementation, in step 302, the base station determines, according to the signal shield quantity, whether the base station is in an out-of-synchronization state, and may include:
当该基站接收到的当前同步源基站的 CRS的信号质量的平均值低于预设 门限时向该基站的高层上报失步指示消息。 When the average value of the signal quality of the CRS of the current synchronization source base station received by the base station is lower than the preset threshold, the out-of-synchronization indication message is reported to the upper layer of the base station.
实施中， 基站在向该基站的高层上报失步指示消息时， 可以从物理层触 发失步指示消息， In the implementation, when the base station reports the out-of-synchronization indication message to the upper layer of the base station, the base station may trigger the out-of-synchronization indication message from the physical layer.
具体的， 当在一定的时间段内， 如果测量同步源基站的 CRS的信号质量 的平均值高于一定的门限， 那么基站就认为自身处在同步的状态， 继续进行 同步保持； 如果测量 CRS的 SINR的平均值低于一定的门限， 那么由物理层 向高层触发一个 out-of-sync (失步）的指示消息， 实施中门限值可以通过仿真 获得。 实施中的高层是指一个基站内部的相对的高层。 比如该基站由物理层 上报给高层 RRC层。 Specifically, if the average value of the signal quality of the CRS of the synchronization source base station is higher than a certain threshold within a certain period of time, the base station considers that it is in a synchronized state, and continues to maintain the synchronization; if the CRS is measured If the average value of the SINR is below a certain threshold, an out-of-sync indication message is triggered by the physical layer to the upper layer, and the implementation threshold can be obtained by simulation. The high level of implementation refers to the relative high level inside a base station. For example, the base station is reported by the physical layer to the upper layer RRC layer.
实施中， 还可以进一步包括： In the implementation, it may further include:
当该基站的高层收到来自物理层的多个失步指示消息时， 开启定时器。 当该基站的定时器开启， 且高层连续地收到多个来自物理层的已同步的 指示消息， 则停止定时器， 基站判断出该基站处于同步的状态。 When the upper layer of the base station receives multiple out-of-synchronization indication messages from the physical layer, the timer is started. When the timer of the base station is turned on, and the upper layer continuously receives multiple synchronized indication messages from the physical layer, the timer is stopped, and the base station determines that the base station is in a synchronized state.
当定时器已开启， 且定时器超时， 则基站判断该基站处于失步的状态。 通过上述方式可以看出， 在步骤 302 中， 在向基站高层上报失步指示消 息后， 当高层连续监测到多个（由高层定义的常量）来自物理层的 out-of-sync 的指示消息， 那么高层可以开启一个定时器， 当定时器已开启， 且收到来自 物理层的多个（可以由高层定义的常量）连续 in-sync (同步）指示消息时，
N2010/079502 基站将停止定时器。 此时认为同步问题已经恢复， 基站将继续正常工作。 如 果定时器超时， 那么就认为无线链路检测失败， 处于失步的状态， 高层将触 发物理层重新进行同步。 When the timer is turned on and the timer expires, the base station determines that the base station is in an out-of-synchronization state. It can be seen that, in step 302, after reporting the out-of-synchronization indication message to the upper layer of the base station, when the upper layer continuously monitors multiple (constant defined by the upper layer), the indication message from the physical layer is out-of-sync. Then the upper layer can start a timer, when the timer is turned on, and receives multiple consecutive in-sync (synchronization) indication messages from the physical layer (constitutable constants defined by the upper layer) N2010/079502 The base station will stop the timer. At this point, the synchronization problem has been recovered and the base station will continue to work normally. If the timer expires, then the radio link detection is considered to be in an out-of-synchronization state, and the upper layer will trigger the physical layer to re-synchronize.
实施中， 在步骤 301基站保持同步过程前， 还可以进一步包括： 基站根据已有的协议流程进行初始同步； In an implementation, before the base station keeps the synchronization process in step 301, the method may further include: performing, by the base station, initial synchronization according to an existing protocol procedure;
或， 通过按小区初搜的方式来搜索可供监听的同步源， 利用空中接口或 是支持的接口获得同步源相关信息， 并与监听到的最优的同步源建立同步。 Or, by searching for the synchronization source that can be monitored by the initial search of the cell, obtaining the synchronization source related information by using the air interface or the supported interface, and establishing synchronization with the monitored optimal synchronization source.
具体的， 新开机的基站可以根据已有的协议流程进行初始同步； 或者通 过执行类似终端小区初搜的过程来搜索可供监听的同步源， 并与之建立同 步。 新节点可以通过空中接口或是可支持的接口（如 X2接口）获得同步源的 相关信息， 包括同步源的层信息和是否同步的信息。 Specifically, the newly-powered base station may perform initial synchronization according to an existing protocol flow; or search for a synchronization source that can be monitored by performing a process similar to the initial search of the terminal cell, and establish synchronization with the same. The new node can obtain information about the synchronization source through the air interface or a supportable interface (such as the X2 interface), including the layer information of the synchronization source and whether the information is synchronized.
在获得多个同步源时， 还可以进一步包括： When obtaining multiple synchronization sources, it may further include:
在通过空口监听或者通过支持的接口获得多个同步源时， 保存多个同步 源的信息， 将满足同步要求的同步源基站信息维持到同步源集合中； 例如可 以根据一些预设的、 一定的规则将满足同步要求的同步源基站信息维持到同 步源集合中。 When multiple synchronization sources are obtained through the air interface monitoring or through the supported interface, the information of the multiple synchronization sources is saved, and the synchronization source base station information that meets the synchronization requirement is maintained in the synchronization source set; for example, according to some preset and certain The rule maintains the synchronization source base station information satisfying the synchronization requirement into the synchronization source set.
这是由于在这一阶段中， 新节点或者新开机的基站可能会获得一组可供 同步的同步源后， 从中选择一个最优的节点进行同步， 同时维持一个同步的 集合， 以便在当前的同步源变得不可用的时候， 可以很快的切换到别的同步 源上， 即， 在通过监听或者通过接口获得多个同步源时， 保存多个同步源的 信息， 这样， 基站在重新选取同步源进行同步时， 便可以迅速的从中选择一 个最优的节点进行同步。 This is because in this phase, the new node or the newly booted base station may obtain a set of synchronization sources that can be synchronized, and then select an optimal node to synchronize, while maintaining a synchronized set, so as to be in the current When the synchronization source becomes unavailable, it can be quickly switched to another synchronization source, that is, when multiple synchronization sources are obtained through monitoring or through the interface, the information of multiple synchronization sources is saved, so that the base station is reselected. When the synchronization source synchronizes, it is possible to quickly select an optimal node for synchronization.
具体的， 基站在重新选取同步源时， 可以包括： Specifically, when the base station reselects the synchronization source, the base station may include:
如果维持的同步源集合中有满足同步要求的基站， 按照预设的规则从同 步源集合中选取同步源， 并与之建立同步； 例如： 按照预设的规则： "将从 同步源集合中的基站接收到的信号质量中最好的信号质量对应的那一个基 站， 选取作为新的同步源" 来选取同步源集合中的某个基站作为新的同步
源， 然后与之建立同步； If there is a base station in the synchronization source set that satisfies the synchronization requirement, the synchronization source is selected from the synchronization source set according to a preset rule, and synchronization is established with the synchronization source; for example: according to a preset rule: "From the synchronization source set The one of the base stations corresponding to the best signal quality received by the base station is selected as a new synchronization source to select a base station in the synchronization source set as a new synchronization. Source, and then establish synchronization with it;
如果维持的同步源集合中没有满足同步要求的基站， 则重新搜索新的同 步源。 If there is no base station in the set of synchronization sources that meets the synchronization requirements, the new synchronization source is searched again.
实施中， 在步骤 303 中， 当基站判断处在失步的状态时， 还可以进一步 包括： In the implementation, in step 303, when the base station determines that it is in an out-of-synchronization state, it may further include:
基站停止上下行数据传输， 重新选取同步源。 The base station stops uplink and downlink data transmission and reselects the synchronization source.
实施中这样处理是为了避免对其他用户产生干扰， 因此低功率基站可以 停止下行数据的发送以及上行数据的接收， 然后才进行新的同步源的选择。 In the implementation, the processing is to avoid interference to other users, so the low-power base station can stop the transmission of the downlink data and the reception of the uplink data, and then select a new synchronization source.
在步骤 303确定要重新选择同步源发起同步过程后， 则在选取新的同步 源的时候， 可以优先选择前面步骤中所维持的同步集合中的基站作为新的同 步源。 在同步集合中， 如果存在有某些基站的信号满足同步要求， 选择该同 步源发起同步过程； 如果在维持的同步集合中没有基站的信号可以满足要 求， 那么该低功率基站可以去重新搜索别的基站的层信息和同步信息， 选择 合适的同步源进行初始同步。 即： After determining in step 303 that the synchronization source is to be reselected to initiate the synchronization process, when the new synchronization source is selected, the base station in the synchronization set maintained in the previous step may be preferentially selected as the new synchronization source. In the synchronization set, if there are some base station signals satisfying the synchronization requirement, the synchronization source is selected to initiate a synchronization process; if no signal of the base station can satisfy the requirement in the maintained synchronization set, the low power base station can re-search for another The layer information and synchronization information of the base station are selected, and an appropriate synchronization source is selected for initial synchronization. which is:
基站确定已失步且维持的同步集合中没有满足要求的同步源后， 还可以 进一步包括： After the base station determines that the synchronization source that has been out of synchronization and the synchronization set is not satisfied, the base station may further include:
基站根据已有的协议流程进行初始同步； The base station performs initial synchronization according to an existing protocol flow;
或， 通过按小区初搜的方式来搜索可供监听的同步源， 利用空中接口或 是支持的接口获得同步源相关信息， 并与监听到的最优的同步源建立同步。 Or, by searching for the synchronization source that can be monitored by the initial search of the cell, obtaining the synchronization source related information by using the air interface or the supported interface, and establishing synchronization with the monitored optimal synchronization source.
在按上述方式实施后， 低功率基站便可以在重新建立起同步后进行数据 的传输。 After being implemented as described above, the low power base station can transmit data after re-establishing the synchronization.
为了更好的说明本发明的实施， 下面以实例进行说明。 In order to better illustrate the practice of the invention, the following description is by way of example.
图 4 为应用于分层网络的失步检测处理实施流程示意图， 如图所示， 可 以包括如下步骤： Figure 4 is a schematic diagram of an implementation process of out-of-synchronization detection processing applied to a layered network. As shown in the figure, the following steps may be included:
步骤 401、 基站进行初始同步。 Step 401: The base station performs initial synchronization.
本步骤中， 新开机的基站根据已有的协议流程进行初始同步； 或者通过 执行类似终端小区初搜的步骤来搜索可供监听的同步源， 并与之建立同步。
2 新节点通过空中接口或是可支持的接口 （如 X2接口）获得同步源的相关信 息， 包括同步源的层信息和是否同步的信息。 在这一阶段中， 新节点可能会 获得一组可供同步的同步源， 需要从中选择一个最优的节点进行同步， 同时 维持一个同步的集合， 以便在当前的同步源变得不可用的时候， 可以很快的 切换到别的同步源上。 In this step, the newly-on base station performs initial synchronization according to an existing protocol flow; or searches for a synchronization source that can be monitored by performing a step similar to the initial search of the terminal cell, and establishes synchronization with it. 2 The new node obtains information about the synchronization source through the air interface or a supportable interface (such as the X2 interface), including the layer information of the synchronization source and whether the information is synchronized. In this phase, the new node may obtain a set of synchronization sources that can be synchronized, and an optimal node needs to be selected for synchronization while maintaining a synchronized collection so that when the current synchronization source becomes unavailable. , you can quickly switch to another sync source.
步骤 402、 基站进行同步保持。 Step 402: The base station performs synchronization holding.
本步骤中， 基站在完成初始同步后， 可以根据相应的协议流程或是通过 检测当前同步源基站的 CRS信息进行同步保持。 In this step, after completing the initial synchronization, the base station may perform synchronization maintenance according to the corresponding protocol procedure or by detecting the CRS information of the current synchronization source base station.
步驟 403、 基站测量当前同步源基站的 CRS的信号质量。 Step 403: The base station measures a signal quality of a CRS of the current synchronization source base station.
本步骤中， 低功率基站在检测当前同步源基站的 CRS时， 测量其接收信 号的 SINR值。 In this step, the low power base station measures the SINR value of the received signal when detecting the CRS of the current synchronization source base station.
步骤 404、 判断是否失步， 是则转入步骤 405, 否则转入步骤 402。 Step 404: Determine whether the step is lost. If yes, go to step 405. Otherwise, go to step 402.
本步骤中， 当在一定的时间段内， 如果测量得到 CRS的信号质量的平均 值高于一定的门限， 那么基站就认为自身处在同步的状态， 继续进行同步保 持； 如果测量得到 CRS的信号质量的平均值低于一定的门限， 那么由物理层 向高层触发一个 out-of-sync的指示消息， 当高层连续监测到多个（由高层定 义的常量）来自物理层的 out-of-sync的指示消息， 那么高层将开启一个定时 器， 当定时器已开启， 且收到来自物理层的多个（由高层定义的常量）连续 in-sync指示消息时， 基站将停止定时器。 此时认为物理层问题已经恢复， 基 站将继续正常工作。 如果定时器超时， 那么就认为无线链路检测失败， 处于 失步的状态， 高层将触发物理层重新进行同步， 进入步骤 405; In this step, if the average value of the signal quality of the CRS is higher than a certain threshold within a certain period of time, the base station considers that it is in a synchronized state and continues to maintain the synchronization; if the CRS signal is measured If the average value of the quality is below a certain threshold, then an out-of-sync indication message is triggered by the physical layer to the upper layer. When the upper layer continuously monitors multiple (constant defined by the upper layer), the out-of-sync comes from the physical layer. The indication message, then the upper layer will start a timer, when the timer is turned on, and the continuous in-sync indication message from the physical layer (constant defined by the higher layer) is received, the base station will stop the timer. At this point, it is considered that the physical layer problem has been restored and the base station will continue to work normally. If the timer expires, then the radio link detection is considered to be in an out-of-synchronization state, and the upper layer will trigger the physical layer to re-synchronize, and proceeds to step 405;
步骤 405、 基站停止数据的传输。 Step 405: The base station stops data transmission.
本步骤中， 为了避免对于其他用户的干扰， 低功率基站将停止下行数据 的发送以及上行数据的接收， 进行新的同步源的选择。 In this step, in order to avoid interference with other users, the low power base station stops the transmission of the downlink data and the reception of the uplink data, and performs a new synchronization source selection.
步骤 406、 判断同步源集合中是否有合适的同步源， 是则转入步骤 407， 否则转入步骤 401。 Step 406: Determine whether there is a suitable synchronization source in the synchronization source set, if yes, go to step 407; otherwise, go to step 401.
本步骤中， 在选取新的同步源的时候， 优先选择所维持的同步集合中的
N2010/079502 基站作为新的同步源。 在同步集合中， 如果存在有某些基站的信号满足同步 要求， 进入步骤 407; 如果在维持的同步集合中没有基站的信号可以满足要 求， 那么进入步骤 401， 该低功率基站将去重新搜索别的基站的层信息和同 步信息， 选择合适的同步源进行初始同步。 In this step, when selecting a new synchronization source, preference is given to the selected synchronization set. The N2010/079502 base station acts as a new synchronization source. In the synchronization set, if there are some base station signals satisfying the synchronization requirement, proceed to step 407; if no signal of the base station can satisfy the requirement in the maintained synchronization set, then proceeding to step 401, the low power base station will go to search again. The layer information and synchronization information of the base station are selected, and an appropriate synchronization source is selected for initial synchronization.
步骤 407、 选取新的同步源后， 执行步骤 402。 Step 407: After selecting a new synchronization source, perform step 402.
本步骤中， 低功率基站选取维持的同步集合中信号质量最好的基站作为 新的同步源， 重新建立起同步后进行数据的传输。 In this step, the low-power base station selects the base station with the best signal quality in the maintained synchronization set as a new synchronization source, and re-establishes the data transmission after synchronization.
由上述实施可见， 本发明实施例中提供的在分层网络中检测失步的机 制， 为分层网络中同步方案提供了必要的补充。 It can be seen from the foregoing implementation that the mechanism for detecting out-of-synchronization in a layered network provided in the embodiment of the present invention provides a necessary supplement for the synchronization scheme in the layered network.
基于同一发明构思， 本发明实施例中还提供了基站， 由于该基站解决问 题的原理与分层网络中基站的同步处理方法相似， 因此该基站的实施可以参 见方法的实施， 重复之处不再赘述， Based on the same inventive concept, the base station is further provided in the embodiment of the present invention. Since the principle of the base station solving the problem is similar to the synchronization processing method of the base station in the layered network, the implementation of the base station can refer to the implementation of the method, and the repetition is no longer Narrative,
图 5为基站结构示意图， 如图所示， 基站中可以包括： FIG. 5 is a schematic structural diagram of a base station. As shown in the figure, the base station may include:
测量模块 501 , 用于在保持基站的同步的过程中， 测量当前同步源基站 的 CRS的信号质量； The measuring module 501 is configured to measure a signal quality of a CRS of the current synchronization source base station while maintaining synchronization of the base station;
判断模块 502， 用于根据所述信号质量判断该基站是否处于失步的状 态； The determining module 502 is configured to determine, according to the signal quality, whether the base station is in an out-of-synchronization state;
同步模块 503， 用于在判断出处于失步的状态时， 重新选取同步源后进 行同步。 The synchronization module 503 is configured to perform synchronization after reselecting the synchronization source when it is determined that the synchronization is in an out-of-synchronization state.
实施中， 同步模块还可以进一步用于在保持同步过程中， 根据相应的协 议流程进行同步保持， 或， 通过检测当前同步源基站的 CRS信息进行同步保 持。 In an implementation, the synchronization module may be further configured to perform synchronization maintenance according to a corresponding protocol flow during the synchronization process, or to perform synchronization maintenance by detecting CRS information of the current synchronization source base station.
实施中， 测量模块还可以进一步用于测量接收到的当前同步源基站的 CRS的 SINR值。 In an implementation, the measurement module may be further configured to measure a SINR value of the received CRS of the current synchronization source base station.
实施中， 判断模块还可以进一步用于当该基站接收到的当前同步源基站 的 CRS的信号质量平均值低于预设门限时向高层上报失步指示消息。 In the implementation, the determining module may be further configured to report the out-of-synchronization indication message to the upper layer when the average signal quality of the CRS of the current synchronization source base station received by the base station is lower than a preset threshold.
实施中， 判断模块还可以进一步用于在向该基站的高层上报失步指示消
2010/079502 息时， 从物理层触发失步指示消息。 In the implementation, the determining module may be further configured to report the out-of-synchronization indication to the upper layer of the base station. In 2010/079502, the out-of-synchronization indication message is triggered from the physical layer.
实施中， 判断模块还可以进一步用于当该基站的高层收到来自物理层的 多个失步指示消息时， 开启定时器。 In an implementation, the determining module may be further configured to: when the upper layer of the base station receives the multiple out-of-synchronization indication messages from the physical layer, start the timer.
实施中， 判断模块还可以进一步用于当定时器开启， 且高层连续的收到 多个来自物理层的已同步的指示消息， 停止定时器， 判断该基站处于同步的 状态。 In the implementation, the judging module may be further configured to: when the timer is turned on, the high layer continuously receives the synchronized indication messages from the physical layer, stops the timer, and determines that the base station is in a synchronized state.
实施中， 判断模块还可以进一步用于当该定时器开启， 且定时器超时， 判断处于失步的状态。 In the implementation, the determining module may be further configured to: when the timer is turned on, and the timer expires, determining that the timer is out of synchronization.
实施中， 基站中还可以进一步包括： In the implementation, the base station may further include:
初始同步模块 504， 用于在保持同步过程前， 根据已有的协议流程进行 初始同步； 或， 通过按小区初搜的方式来搜索可供监听的同步源， 利用空中 接口或是支持的接口获得同步源的相关信息， 并与监听到的最优的同步源建 立同步。 The initial synchronization module 504 is configured to perform initial synchronization according to an existing protocol flow before the synchronization process is maintained; or, by searching for a synchronization source that can be monitored by searching for a cell, using an air interface or a supported interface. Synchronize the information about the source and synchronize with the monitored optimal synchronization source.
实施中， 初始同步模块还可以进一步用于在通过监听或者通过接口获得 多个同步源时， 保存多个同步源的信息， 将满足同步要求的同步源基站信息 维持到同步源集合中； 例如根据一定的规则将满足同步要求的同步源基站信 息维持到同步源集合中。 In an implementation, the initial synchronization module may be further configured to save information of multiple synchronization sources when acquiring multiple synchronization sources through monitoring or through an interface, and maintain synchronization source base station information that meets synchronization requirements into a synchronization source set; for example, according to A certain rule maintains the synchronization source base station information satisfying the synchronization requirement into the synchronization source set.
实施中， 同步模块还可以进一步用于在重新选取同步源时， 如果维持的 同步源集合中有满足同步要求的基站， 则按照预设的规则从同步源集合中选 取同步源， （例如选取同步源集合中信号质量最好的基站作为新的同步源）， 并与之建立同步； 如果维持的同步源集合中没有满足同步要求的基站， 则重 新搜索新的同步源。 In an implementation, the synchronization module may be further configured to: when the synchronization source is reselected, if there is a base station that meets the synchronization requirement in the maintained synchronization source set, select a synchronization source from the synchronization source set according to a preset rule, for example, select synchronization. The base station with the best signal quality in the source set acts as a new synchronization source) and establishes synchronization with it; if there is no base station in the maintained synchronization source set that satisfies the synchronization requirement, the new synchronization source is searched again.
实施中， 同步模块还可以进一步用于在确定重新选择同步源且同步集合 中没有满足同步要求的同步源时， 根据已有的协议流程进行初始同步； 或， 通过按小区初搜的方式来搜索可供监听的同步源， 利用空中接口或是支持的 接口获得同步源相关信息， 并与获得的最优的同步源建立同步。 In an implementation, the synchronization module may be further configured to: perform initial synchronization according to an existing protocol flow when determining that the synchronization source is reselected and the synchronization source that does not meet the synchronization requirement in the synchronization set; or, search by searching by the cell. A synchronization source that can be monitored, obtains synchronization source related information by using an air interface or a supported interface, and establishes synchronization with the obtained optimal synchronization source.
实施中， 基站中还可以进一步包括：
2 传输模块 505， 用于在确定重新选择同步源发起同步过程前， 停止下行 数据的发送和 /或上行数据的接收。 In the implementation, the base station may further include: The transmission module 505 is configured to stop sending the downlink data and/or receiving the uplink data before determining to reselect the synchronization source to initiate the synchronization process.
为了描述的方便， 以上所述装置的各部分以功能分为各种模块或单元分 别描述。 当然， 在实施本发明时可以把各模块或单元的功能在同一个或多个 软件或硬件中实现。 For convenience of description, the various parts of the above described devices are divided into various modules or units by function. Of course, the functions of the various modules or units may be implemented in one or more software or hardware in the practice of the invention.
本发明实施中 , 基站通过测量所监听的同步基站的 CRS的信号质量判定 自己是否处于失步的状态以及利用该信号质量控制整个失步检测的流程。 In the implementation of the present invention, the base station determines whether it is in an out-of-synchronization state by measuring the signal quality of the CRS of the monitored synchronous base station, and controls the flow of the entire out-of-synchronization detection by using the signal quality.
具体的， 在本发明一个方案的实施过程中， 基站在保持同步过程中， 会 去测量当前同步源基站的 CRS的信号质量并且根据测量的信号质量确定是否 向高层基站上报失步指示消息； 最后根据高层基站的指示确定是否重新选择 同步源发起同步过程。 Specifically, in the implementation of an aspect of the present invention, the base station measures the signal quality of the CRS of the current synchronization source base station during the synchronization process, and determines whether to report the out-of-synchronization indication message to the high-layer base station according to the measured signal quality; Determining whether to reselect the synchronization source to initiate the synchronization process according to the indication of the high-level base station.
进一步的， 基站高层在接收到上报的失步指示消息后， 当上报的失步指 示消息数量超过预设门限时， 开启定时器； 开启定时器后， 若在定时器超时 时还未收到上报的多个（由高层预定义的数量） 同步指示消息， 则指示重新 选择同步源发起同步过程。 Further, after receiving the reported out-of-synchronization indication message, the upper layer of the base station starts the timer when the number of reported out-of-synchronization indication messages exceeds a preset threshold; after the timer is started, if the timer has expired, the report has not been received. Multiple (predefined by the higher layer) synchronization indication message indicates that the synchronization source is reselected to initiate the synchronization process.
因此， 本发明实施例提供的技术方案中， 基站通过测量所监听的同步基 站的 CRS的信号质量来检测自己是否处于失步的状态， 以及根据该检测结果 保证整个分层网络中基站的同步， 因此， 基站能够及时的发现失步状态， 并 去保证自己处于同步的状态， 为分层网络中同步方案提供了必要的补充。 Therefore, in the technical solution provided by the embodiment of the present invention, the base station detects whether the UE is in an out-of-synchronization state by measuring the signal quality of the CRS of the monitored synchronous base station, and ensures synchronization of the base station in the entire hierarchical network according to the detection result. Therefore, the base station can discover the out-of-synchronization state in time and ensure that it is in a synchronized state, which provides a necessary supplement for the synchronization scheme in the layered network.
本领域内的技术人员应明白， 本发明的实施例可提供为方法、 系统、 或 计算机程序产品。 因此， 本发明可采用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实施例的形式。 而且， 本发明可采用在一个或多个 其中包含有计算机可用程序代码的计算机可用存储介质 (包括但不限于磁盘 存储器、 CD-ROM、 光学存储器等）上实施的计算机程序产品的形式。 Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
本发明是参照根据本发明实施例的方法、 设备（系统）、 和计算机程序产 品的流程图和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图 和 /或方框图中的每一流程和 /或方框、 以及流程图和 /或方框图中的流程
02 和 /或方框的结合。 可提供这些计算机程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器， 使得通 过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流 程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。 The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It should be understood that each of the processes and/or blocks in the flowcharts and/or block diagrams, and the flow in the flowcharts and/or block diagrams can be implemented by computer program instructions. 02 and / or a combination of boxes. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设 备以特定方式工作的计算机可读存储器中， 使得存储在该计算机可读存储器 中的指令产生包括指令装置的制造品， 该指令装置实现在流程图一个流程或 多个流程和 /或方框图一个方框或多个方框中指定的功能。 The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
这些计算机程序指令也可装栽到计算机或其他可编程数据处理设备上， 使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的 处理， 从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图 一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的步 骤。 These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device The instructions provide steps for implementing the functions specified in a block or blocks of a flow or a flow and/or a block diagram of a flowchart.
尽管已描迷了本发明的优选实施例， 但本领域内的技术人员一旦得知了 基本创造性概念， 则可对这些实施例作出另外的变更和修改。 所以， 所附权 利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。 Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the < Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and modifications
显然， 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本 发明的精神和范围。 这样， 倘若本发明的这些修改和变型属于本发明权利要 求及其等同技术的范围之内， 则本发明也意图包含这些改动和变型在内。
It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions
Claims
1、 一种分层网络中基站的同步处理方法， 其特征在于， 包括： A method for synchronizing a base station in a layered network, characterized in that it comprises:
基站在保持同步过程中， 测量当前同步源基站的小区专属导频信号 CRS 的信号质量； The base station measures the signal quality of the cell-specific pilot signal CRS of the current synchronization source base station while maintaining synchronization;
基站根据所述信号质量判断该基站是否处于失步的状态； Determining, by the base station, whether the base station is in an out-of-synchronization state according to the signal quality;
如果判断出处于失步的状态， 所述基站重新选取同步源后进行同步。 If it is determined that the state is out of synchronization, the base station reselects the synchronization source and performs synchronization.
2、 如权利要求 1所述的方法， 其特征在于， 基站在保持同步过程中是： 根据相应的协议流程进行同步保持， 或 2. The method according to claim 1, wherein the base station is in the process of maintaining synchronization: performing synchronous maintenance according to a corresponding protocol flow, or
通过检测当前同步源基站的 CRS信息进行同步保持。 The synchronization is maintained by detecting the CRS information of the current synchronization source base station.
3、 如权利要求 1所述的方法， 其特征在于， 所述信号质量是基站接收到 的当前同步源基站的 CRS的信号与干扰和噪声比 SINR值。 3. The method according to claim 1, wherein the signal quality is a signal to interference and noise ratio SINR value of a CRS of a current synchronization source base station received by the base station.
4、 如权利要求 1所述的方法， 其特征在于， 基站根据所述信号质量判断 该基站是否处于失步的状态， 包括： The method according to claim 1, wherein the base station determines, according to the signal quality, whether the base station is in an out-of-synchronization state, and the method includes:
当该基站接收到的当前同步源基站的 CRS的信号质量的平均值低于预设 门限时， 向该基站的高层上报失步指示消息。 When the average value of the signal quality of the CRS of the current synchronization source base station received by the base station is lower than the preset threshold, the out-of-synchronization indication message is reported to the upper layer of the base station.
5、 如权利要求 4所述的方法， 其特征在于， 基站在向该基站的高层上报 失步指示消息时， 从物理层触发该失步指示消息。 The method according to claim 4, wherein the base station triggers the out-of-synchronization indication message from the physical layer when reporting the out-of-synchronization indication message to the upper layer of the base station.
6、 如权利要求 5所述的方法， 其特征在于， 基站根据所述信号盾量判断 该基站是否处于失步的状态， 还包括： The method according to claim 5, wherein the base station determines, according to the signal shield quantity, whether the base station is in an out-of-synchronization state, and further includes:
当该基站的高层收到来自物理层的预定数量个失步指示消息时， 开启定 时器； When the upper layer of the base station receives a predetermined number of out-of-synchronization indication messages from the physical layer, the timer is turned on;
当该基站的定时器开启， 且高层连续的收到预定数量个来自物理层的已 同步的指示消息时， 停止该定时器， 且基站判断该基站处于同步的状态； 当该基站的定时器开启， 且该定时器超时， 基站判断该基站处于失步的 状态。 When the timer of the base station is turned on, and the upper layer continuously receives a predetermined number of synchronized indication messages from the physical layer, the timer is stopped, and the base station determines that the base station is in a synchronized state; when the timer of the base station is turned on And the timer expires, and the base station determines that the base station is in an out-of-synchronization state.
7、 如权利要求 1所述的方法， 其特征在于， 当基站判断处在失步的状态 时， 在停止上下行数据传输后重新选取同步源。 7. The method according to claim 1, wherein when the base station determines that it is in an out-of-synchronization state When the uplink and downlink data transmission is stopped, the synchronization source is reselected.
8、 如权利要求 1至 7任一所述的方法， 其特征在于， 基站在保持同步过 程前， 进一步包括： The method according to any one of claims 1 to 7, wherein the base station further comprises: before the synchronization process is maintained:
基站根据已有的协议流程进行初始同步； The base station performs initial synchronization according to an existing protocol flow;
或， 基站通过按小区初搜的方式来搜索可供监听的同步源， 利用空中接 口或是支持的接口获得同步源的相关信息， 并与监听到的最优的同步源建立 同步。 Or, the base station searches for a synchronization source that can be monitored by searching for a cell, and obtains information about the synchronization source by using an air interface or a supported interface, and establishes synchronization with the monitored optimal synchronization source.
9、 如权利要 8所述的方法， 其特征在于， 进一步包括： 9. The method of claim 8, further comprising:
在利用空口接口或者支持的接口获得多个同步源的相关信息时， 保存所 述多个同步源的相关信息， 将满足同步要求的同步源的相关信息维持到同步 源集合中。 When the information about the plurality of synchronization sources is obtained by using the air interface or the supported interface, the related information of the plurality of synchronization sources is saved, and the related information of the synchronization source that satisfies the synchronization requirement is maintained in the synchronization source set.
10、 如权利要求 9 所述的方法， 其特征在于， 基站在重新选取同步源 时， 包括： The method according to claim 9, wherein when the base station reselects the synchronization source, the method includes:
如果维持的同步源集合中有满足同步要求的基站， 则按照预设的规则从 同步源集合中选取同步源， 并与之建立同步； If the maintained synchronization source set has a base station that satisfies the synchronization requirement, the synchronization source is selected from the synchronization source set according to a preset rule, and synchronization is established with the synchronization source;
如果维持的同步源集合中没有满足同步要求的基站， 则重新搜索新的同 步源。 If there is no base station in the set of synchronization sources that meets the synchronization requirements, the new synchronization source is searched again.
11、 如权利要求 10所述的方法， 其特征在于， 基站重新搜索新的同步源 进行同步， 包括： The method according to claim 10, wherein the base station re-searches for a new synchronization source for synchronization, including:
基站根据已有的协议流程进行初始同步； The base station performs initial synchronization according to an existing protocol flow;
或， 基站通过按小区初搜的方式来搜索可供监听的同步源， 利用空中接 口或是支持的接口获得同步源相关信息， 并与监听到的最优的同步源建立同 步。 Or, the base station searches for the synchronization source that can be monitored by searching for the cell, and obtains the synchronization source related information by using the air interface or the supported interface, and establishes synchronization with the monitored optimal synchronization source.
12、 一种基站， 其特征在于， 包括： 12. A base station, comprising:
测量模块， 用于在保持基站的同步过程中， 测量当前同步源基站的 CRS 的信号质量； a measuring module, configured to measure a signal quality of a CRS of a current synchronization source base station during synchronization of the base station;
判断模块， 用于根据所述信号质量判断该基站是否处于失步的状态； 同步模块， 用于在判断处于失步的状态时， 重新选取同步源后进行同 步。 a determining module, configured to determine, according to the signal quality, whether the base station is in an out-of-synchronization state; The synchronization module is configured to perform synchronization after reselecting the synchronization source when judging the state of being out of synchronization.
13、 如权利要求 11所述的基站， 其特征在于， 同步模块进一步用于在保 持同步过程中， 根据相应的协议流程进行同步保持， 或， 通过检测当前同步 源基站的 CRS信息进行同步保持。 The base station according to claim 11, wherein the synchronization module is further configured to perform synchronization maintenance according to a corresponding protocol flow during the process of maintaining synchronization, or perform synchronization maintenance by detecting CRS information of the current synchronization source base station.
14、 如权利要求 11所述的基站， 其特征在于， 测量模块进一步用于测量 接收到的当前同步源基站的 CRS的 SINR值。 The base station according to claim 11, wherein the measuring module is further configured to measure the SINR value of the received CRS of the current synchronization source base station.
15、 如权利要求 11所述的基站， 其特征在于， 判断模块进一步用于当该 基站接收到的当前同步源基站的 CRS的信号质量的平均值低于预设门限时向 该基站的高层上报失步指示消息。 The base station according to claim 11, wherein the determining module is further configured to report to the upper layer of the base station when the average value of the signal quality of the CRS of the current synchronization source base station received by the base station is lower than a preset threshold. Out of step indication message.
16、 如权利要求 15所述的基站， 其特征在于， 判断模块进一步用于在向 该基站的高层上报失步指示消息时， 从物理层触发该失步指示消息。 The base station according to claim 15, wherein the determining module is further configured to trigger the out-of-synchronization indication message from the physical layer when reporting the out-of-synchronization indication message to the upper layer of the base station.
17、 如权利要求 16所述的基站， 其特征在于， 判断模块进一步用于： 当该基站的高层收到来自物理层的预定数量个失步指示消息时， 开启定 时器； The base station according to claim 16, wherein the determining module is further configured to: when the upper layer of the base station receives a predetermined number of out-of-synchronization indication messages from the physical layer, start the timer;
当该定时器开启， 且所述高层连续的收到预定数量个来自物理层的已同 步的指示消息时， 停止该定时器， 并判断该基站处于同步的状态； 以及 When the timer is turned on, and the high layer continuously receives a predetermined number of synchronized indication messages from the physical layer, stopping the timer and determining that the base station is in a synchronized state;
当该定时器开启， 且该定时器超时， 判断该基站处于失步的状态。 When the timer is turned on and the timer expires, it is determined that the base station is in an out-of-synchronization state.
18、 如权利要求 11所迷的基站， 其特征在于， 还包括： 18. The base station as claimed in claim 11, further comprising:
传输模块， 用于在重新选取同步源进行同步前， 停止下行数据的发送和 / 或上行数据的接收。 The transmission module is configured to stop transmission of downlink data and/or reception of uplink data before reselecting the synchronization source for synchronization.
19、 如权利要求 11至 18任一所述的基站， 其特征在于， 还包括： 初始同步模块， 用于在保持同步过程前， 根据已有的协议流程进行初始 同步； 或， 通过按小区初搜的方式来搜索可供监听的同步源， 利用空中接口 或是支持的接口获得同步源的相关信息， 并与监听到的最优的同步源建立同 步。 The base station according to any one of claims 11 to 18, further comprising: an initial synchronization module, configured to perform initial synchronization according to an existing protocol flow before the synchronization process is maintained; or The search method searches for the synchronization source that can be monitored, and obtains the relevant information of the synchronization source by using the air interface or the supported interface, and establishes synchronization with the monitored optimal synchronization source.
20、 如权利要求 19所述的基站， 其特征在于， 初始同步模块进一步用于 在利用空口接口或者支持的接口获得多个同步源的相关信息时， 保存所述多 个同步源的相关信息， 并将满足同步要求的同步源的相关信息维持到同步源 集合中。 20. The base station according to claim 19, wherein the initial synchronization module is further used for When the information about the plurality of synchronization sources is obtained by using the air interface or the supported interface, the related information of the multiple synchronization sources is saved, and the related information of the synchronization source that satisfies the synchronization requirement is maintained in the synchronization source set.
21、 如权利要求 20所述的基站， 其特征在于， 同步模块进一步用于在重 新选取同步源时， 如果维持的同步源集合中有满足同步要求的基站， 则按照 预设的规则从同步源集合中选取同步源， 并与之建立同步； 如果维持的同步 源集合中没有满足同步要求的基站， 则重新搜索新的同步源。 The base station according to claim 20, wherein the synchronization module is further configured to: when the synchronization source is reselected, if there is a base station that satisfies the synchronization requirement in the maintained synchronization source set, the synchronization source is according to a preset rule. The synchronization source is selected in the set and synchronized with it; if there is no base station in the maintained synchronization source set that satisfies the synchronization requirement, the new synchronization source is searched again.
22、 如权利要求 21所述的基站， 其特征在于， 同步模块进一步用于在重 新搜索新的同步源进行同步时， 根据已有的协议流程进行初始同步； 或， 通 过按小区初搜的方式来搜索可供监听的同步源， 利用空中接口或是支持的接 口获得同步源的相关信息， 并与监听到的最优的同步源建立同步。 The base station according to claim 21, wherein the synchronization module is further configured to perform initial synchronization according to an existing protocol flow when re-searching for a new synchronization source for synchronization; or, by searching for a cell by way of initial search To search for the synchronization source that can be monitored, use the air interface or the supported interface to obtain the relevant information of the synchronization source, and establish synchronization with the optimal synchronization source that is monitored.
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