WO2011098011A1

WO2011098011A1 - Synchronization method and device for air interface in time division system

Info

Publication number: WO2011098011A1
Application number: PCT/CN2011/070803
Authority: WO
Inventors: 储育红; 李建; 赵晓飞; 甄维学; 史文学
Original assignee: 华为技术有限公司
Priority date: 2010-02-10
Filing date: 2011-01-30
Publication date: 2011-08-18
Also published as: CN102149186B; CN102149186A

Abstract

The present invention relates to communication technical field, and provides a synchronization method and device for air interface in time division system, said method includes: determining whether there is an base station out of step according to the System Frame Number (SFN) observed time difference between two cells in the measurement report which is reported by the terminals in the neighboring cells; if there is a base station out of step, a synchronization is performed for the un-synchronous base station. Using the present invention, a desynchronization of base station caused by the slow drift of the clock reference source can be detected and an air interface synchronization for the system can be realized.

Description

时分***空口同步方法及设备本申请要求于 2010年 2月 10 日提交中国专利局、申请号为 201010111228.X, 发明名称为 "时分***空口同步方法及设备" 的中国专利申请的优先权，其全部内容通过引用结合在本申请中。技术领域 Time-division system air interface synchronization method and device The present application claims priority to Chinese patent application entitled "Time-division system air interface synchronization method and device" submitted to the Chinese Patent Office on February 10, 2010, application number 201010111228.X, The entire contents are incorporated herein by reference. Technical field

本发明涉及通信技术，具体涉及一种时分***空口同步方法及设备。背景技术 The present invention relates to communication technologies, and in particular, to a time-division system air interface synchronization method and device. Background technique

TD-SCDMA ( Time Division- Synchronous Code Division Multiple Access , 时分同步的码分多址）***是一个同步***，所有基站必须釆用相同的时钟源进行同步。如果某一基站的时钟源发生漂移，会导致该基站失步，从而会带来基站和终端设备的空口的频率失步和时间失步。基站之间时间不同步时，带来的干扰主要有两方面： The TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system is a synchronous system, and all base stations must use the same clock source for synchronization. If the clock source of a certain base station drifts, the base station will be out of synchronization, which will result in frequency out-of-synchronization and time-out of the air interface of the base station and the terminal equipment. When the time between base stations is not synchronized, there are two main aspects of interference:

1. 基站侧：相邻基站之间的上、下行时隙（下行导频时隙 DWpts、上行导频时隙 UPpts、上行工作时隙、下行工作时隙）之间的干扰； 1. Base station side: interference between uplink and downlink time slots (downlink pilot time slots DWpts, uplink pilot time slots UPpts, uplink working time slots, downlink working time slots) between adjacent base stations;

2. 终端侧：相邻基站下的终端之间的上、下行时隙（DWpts、 UPpts、上行工作时隙、下行工作时隙 )之间的干扰。 2. Terminal side: Interference between uplink and downlink time slots (DWpts, UPpts, uplink working time slots, and downlink working time slots) between terminals in adjacent base stations.

鉴于此，如何对基站失步进行检测，检测出失步后釆取何种措施进行时钟校准是 TD-SCDMA***面临的难题。 In view of this, how to detect the out-of-station of the base station and detect what measures to take after the out-of-synchronization to perform the clock calibration is a difficult problem for the TD-SCDMA system.

目前， TD-SCDMA***基站是通过跟踪时钟参考源来产生基站***所需要的高性能时钟需求，所釆用的***时钟参考源是 GPS ( Global Positioning System, 全球定位***）授时接收机，失步检测的手段主要有时钟源设备本身的告警和基站设备同步模块的检测告警，即如果卫星授时接收机不可用，将会出现告警，告警主要有两种：一种是 GPS授时接收机自身输出的告警，如天线开路、短路等；一种是基站时钟同步模块检测到输入到基站的 lpps时钟性能较差无法使用进行告警。时钟校准的方法主要釆用备份时钟源倒换等技术。 At present, the base station of the TD-SCDMA system generates the high-performance clock required by the base station system by tracking the clock reference source. The system clock reference source used is a GPS (Global Positioning System) timing receiver, which is out of step. The detection means mainly include the alarm of the clock source device itself and the detection alarm of the base station equipment synchronization module, that is, if the satellite timing receiver is unavailable, an alarm will occur, and there are two main types of alarms: one is the GPS timing receiver itself output. Alarms, such as open circuit, short circuit, etc.; one is that the base station clock synchronization module detects that the lpps clock input to the base station is poor and cannot be used for alarm. The method of clock calibration mainly uses technologies such as backup clock source switching.

对于参考源丟失，抖动过大或大频偏等问题，基站可以通过本地的时钟进行可用性判断，但是对于时钟参考源緩慢漂移导致的基站失步，时钟源和基站设备无法检测出来，从而也就不能对基站进行时钟校准。发明内容 For reference source loss, excessive jitter or large frequency offset, the base station can pass the local clock. The availability judgment is made, but the base station is out of synchronization caused by the slow drift of the clock reference source, and the clock source and the base station device cannot be detected, so that the base station cannot be clock-calibrated. Summary of the invention

本发明实施例提供一种时分***空口同步方法及设备。 Embodiments of the present invention provide a time division system air interface synchronization method and device.

一方面，本发明实施例一种时分***空口同步方法，包括： In one aspect, a method for air interface synchronization of a time division system according to an embodiment of the present invention includes:

根据相邻小区内的终端上报的测量报告中的两小区间 SFN观测时间差，确定是否有基站出现失步； Determining whether there is a base station out of synchronization according to the SFN observation time difference between the two cells in the measurement report reported by the terminal in the neighboring cell;

如果有基站出现失步，则对失步的基站进行同步。 If there is a base station out of synchronization, the out-of-synchronization base station is synchronized.

另一方面，本发明实施例提供一种无线网络控制器，包括： In another aspect, an embodiment of the present invention provides a radio network controller, including:

测量报告接收单元，用于接收相邻小区内的终端上报的测量报告；检测单元，用于根据相邻小区内的终端上报的测量报告中的两小区间 SFN 观测时间差，确定是否有基站出现失步； a measurement report receiving unit, configured to receive a measurement report reported by a terminal in a neighboring cell; and a detecting unit, configured to determine, according to a time difference of SFN observation between the two cells in the measurement report reported by the terminal in the neighboring cell, whether the base station is lost Step

同步单元，用于在所述检测单元检测到有基站出现失步后，对所述失步的基站进行同步。 And a synchronization unit, configured to synchronize the out-of-synchronization base station after the detecting unit detects that a base station is out of synchronization.

本发明实施例提供的时分***空口同步方法及设备，根据相邻小区内的多个终端上 4艮的测量报告中的不同小区间 SFN ( System Frame Number , ***帧号）观测时间差进行联合判决，确定失步的基站和未失步的基站，从而可以对基站失步例如时钟源緩慢漂移引起的基站失步进行有效地检测，进而对失步的基站进行同步，实现时分***空口同步，保障了基站的正常工作。附图说明 The method and device for synchronizing the air interface of the time division system according to the embodiment of the present invention perform joint judgment according to the time difference of SFN (System Frame Number) observation time of different cells in the measurement report of the plurality of terminals in the neighboring cell. Determining the out-of-synchronization base station and the non-synchronized base station, so that the base station out-of-step, for example, the base station out-of-synchronization caused by the slow drift of the clock source can be effectively detected, and then the out-of-step base station is synchronized, and the time-division system air interface synchronization is realized, which ensures The normal operation of the base station. DRAWINGS

为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。 In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

图 1是本发明实施例时分***空口同步方法的流程图； 1 is a flowchart of a method for synchronizing air interfaces of a time division system according to an embodiment of the present invention;

图 2是本发明实施例中相邻小区示意图； 2 is a schematic diagram of a neighboring cell in an embodiment of the present invention;

图 3是本发明实施例无线网络控制器的一种结构示意图；图 4是本发明实施例无线网络控制器的另一种结构示意图。具体实施方式 3 is a schematic structural diagram of a radio network controller according to an embodiment of the present invention; 4 is another schematic structural diagram of a radio network controller according to an embodiment of the present invention. detailed description

为了使本技术领域的人员更好地理解本发明实施例的方案，下面结合附图和实施方式对本发明实施例作进一步的详细说明。 The embodiments of the present invention are further described in detail below with reference to the accompanying drawings and embodiments.

在时分***中，终端在进行小区切换时或者根据网络侧的通知，进行测量并向网络侧上报测量报告，其中包含不同小区到达此终端的 SFN之间的偏差值。比如，终端处于小区 1中，小区 1的相邻小区包括：小区 2、小区 3 , 则该终端上报的测量报告中包含小区 1 和小区 2之间的 SFN的偏差值，记为 SFN1-SFN2 , 以及小区 1和小区 3之间的 SFN的偏差值，记为 SFN1-SFN3。为此，本发明实施例提供的时分***空口同步方法及设备，根据相邻小区内的多个终端上报的测量报告中的两小区间 SFN观测时间差（SFN-SFN OTD )进行联合判决，确定失步的基站和未失步的基站；对失步的基站进行同步。 In the time division system, when the terminal performs cell handover or according to the notification of the network side, the terminal performs measurement and reports a measurement report to the network side, which includes the deviation value between the SFNs of different cells arriving at the terminal. For example, the terminal is in the cell 1, and the neighboring cell of the cell 1 includes: the cell 2 and the cell 3. The measurement report reported by the terminal includes the offset value of the SFN between the cell 1 and the cell 2, and is recorded as SFN1-SFN2. And the deviation value of the SFN between the cell 1 and the cell 3, which is denoted as SFN1-SFN3. To this end, the method and device for synchronizing the air interface of the time-division system provided by the embodiment of the present invention perform joint judgment according to the SFN observation time difference (SFN-SFN OTD) between two cells in the measurement report reported by multiple terminals in the neighboring cell, and determine the loss. The base station of the step and the base station that is not out of step; synchronizing the out-of-synchronization base station.

如图 1所示，是本发明实施例时分***空口同步方法的流程图，包括以下步骤： As shown in FIG. 1 , it is a flowchart of a method for synchronizing air interfaces of a time division system according to an embodiment of the present invention, which includes the following steps:

步骤 101 , 根据相邻小区内的至少一个终端上报的测量报告中的两小区间 SFN观测时间差（ SFN-SFN OTD ), 确定是否有基站出现失步。 Step 101: Determine, according to the SFN observation time difference (SFN-SFN OTD) between the two cells in the measurement report reported by the at least one terminal in the neighboring cell, whether the base station is out of synchronization.

具体地，步骤 101可以包括以下步骤： Specifically, step 101 may include the following steps:

( 1 )通知所述多个终端中第一终端上报测量报告，具体地，可以定时通知所述第一终端上报测量报告。 (1) Notifying the first terminal of the plurality of terminals to report the measurement report. Specifically, the first terminal may report the measurement report periodically.

( 2 )如果所述第一终端上报的测量报告中第一小区和第二小区间 SFN观测时间差超过预定的第一门限值，则向所述第一终端所在小区内的处于连接状态的其他终端及与所述第一终端所在小区的相邻小区内的处于连接状态的终端所形成的组合中的多个终端发起测量控制消息。 (2) if the SFN observation time difference between the first cell and the second cell in the measurement report reported by the first terminal exceeds a predetermined first threshold value, the other connected state in the cell where the first terminal is located The terminal and the plurality of terminals in the combination formed by the terminal in the connected state in the neighboring cell of the cell in which the first terminal is located initiate a measurement control message.

( 3 )接收所述组合中的多个终端上报的测量报告。 (3) receiving a measurement report reported by a plurality of terminals in the combination.

( 4 )如果接收到的测量报告中第一小区和第二小区间 SFN观测时间差超过所述第一门限的比例超过预定的比例阔值，则确定第一小区中的基站或者第二小区中的基站出现失步。 (4) determining, in the received measurement report, that the ratio of the SFN observation time difference between the first cell and the second cell exceeds the first threshold exceeds a predetermined proportional threshold, determining whether the base station in the first cell or the second cell The base station is out of sync.

对于上述过程将在后面举例详细说明。步骤 102, 如果有基站出现失步，则对失步的基站进行同步。具体地，在对失步的基站进行同步时，可以根据所述失步的基站是否有备份参考源来决定同步方式。比如，所述失步的基站有备份参考源，则优先指示所述失步的基站将本地时钟切换到所述备份参考源；否则，可以将失步的基站和未失步的基站之间的 SFN-SFN OTD发送给所述失步的基站，以使所述失步的基站根据接收到的 SFN-SFN OTD进行时钟校准。比如，如果第一小区中的基站失步，并且没有备份参考源，则计算与第一小区相邻的其他小区内的终端上报的测量报告中第一小区和第二小区间 SFN观测时间差的均值，并将该均值发送给第一小区中的基站，以使第一小区中的基站根据接收到的均值进行时钟校准；或者如果第二小区中的基站失步，并且没有备份参考源，则计算与第二小区相邻的其他小区内的终端上报的测量报告中第一小区和第二小区间 SFN观测时间差的均值，并将该均值发送给第二小区中的基站，以使第二小区中的基站根据接收到的均值进行时钟校准。 The above process will be described in detail later as an example. Step 102: If there is a base station out of synchronization, the out-of-synchronization base station is synchronized. Specifically, when synchronizing the out-of-synchronization base station, the synchronization mode may be determined according to whether the out-of-synchronization base station has a backup reference source. For example, the out-of-synchronization base station has a backup reference source, and then preferentially instructs the out-of-synchronization base station to switch the local clock to the backup reference source; otherwise, between the out-of-synchronization base station and the non-synchronized base station. The SFN-SFN OTD is sent to the out-of-synchronization base station to cause the out-of-synchronization base station to perform clock calibration according to the received SFN-SFN OTD. For example, if the base station in the first cell is out of synchronization and does not back up the reference source, calculate the mean value of the SFN observation time difference between the first cell and the second cell in the measurement report reported by the terminal in the other cell adjacent to the first cell. And transmitting the average value to the base station in the first cell, so that the base station in the first cell performs clock calibration according to the received mean value; or if the base station in the second cell loses synchronization and does not back up the reference source, The average value of the SFN observation time difference between the first cell and the second cell in the measurement report reported by the terminal in the other cell adjacent to the second cell, and the average value is sent to the base station in the second cell, so that the second cell is in the second cell The base station performs clock calibration based on the received average.

基站进行时钟校准的具体的校准过程与现有技术中类似，在此不再详细描述。 The specific calibration process for the base station to perform clock calibration is similar to that in the prior art and will not be described in detail herein.

当然，本发明实施例的方法中对失步的基站进行同步的过程并不仅限于上述这种方式，比如，可以优选使所述失步的基站根据接收到的 SFN-SFN OTD 进行时钟校准。例如有备份参考源时，失步的基站根据接收到的 SFN-SFN OTD 进行时钟校准。 Of course, the process of synchronizing the out-of-synchronization base station in the method of the embodiment of the present invention is not limited to the above manner. For example, the out-of-synchronization base station may preferably perform clock calibration according to the received SFN-SFN OTD. For example, when there is a backup reference source, the out-of-synchronization base station performs clock calibration based on the received SFN-SFN OTD.

在本发明实施例中，对失步的基站进行同步时，首先要确定出具体有哪些基站处于失步状态，也就是说，确定失步的基站和未失步的基站，然后对失步的基站进行时钟校准。具体地，可以通过计算所述组合中的多个终端上报的测量报告中第一小区和第二小区间 SFN观测时间差的均值，以及第一小区与除第二小区外的其他相邻小区间 SFN观测时间差的均值、第二小区与除第一小区外的其他相邻小区间 SFN观测时间差的均值；如果第一小区和第二小区间 SFN观测时间差的均值超过第二门限值，并且第一小区与除第二小区外的其他小区间 SFN观测时间差的均值未超过所述第二门限值，则确定第二小区中的基站失步，第一小区中的基站未失步；或者如果第一小区和第二小区间 SFN 观测时间差的均值超过第二门限值，并且第二小区与除第一小区外的其他小区间 SFN观测时间差的均值未超过所述第二门限值，则确定第一小区的基站失步，第二小区中的基站未失步。详细过程将在后面举例说明。 In the embodiment of the present invention, when synchronizing the out-of-synchronization base stations, first determining which base stations are in an out-of-synchronization state, that is, determining an out-of-synchronization base station and a non-synchronized base station, and then The base station performs clock calibration. Specifically, the average value of the SFN observation time difference between the first cell and the second cell in the measurement report reported by the multiple terminals in the combination, and the SFN between the first cell and other neighboring cells except the second cell may be calculated. Observing the mean value of the time difference, the mean value of the SFN observation time difference between the second cell and other neighboring cells except the first cell; if the mean value of the SFN observation time difference between the first cell and the second cell exceeds the second threshold, and the first If the average value of the SFN observation time difference between the cell and other cells except the second cell does not exceed the second threshold, determining that the base station in the second cell is out of synchronization, the base station in the first cell is not out of synchronization; The mean value of the SFN observation time difference between a cell and the second cell exceeds a second threshold, and the second cell and other cells except the first cell If the mean value of the inter-SFN observation time difference does not exceed the second threshold, it is determined that the base station of the first cell is out of synchronization, and the base station in the second cell is not out of synchronization. The detailed process will be exemplified later.

下面举例进一步详细说明本发明实施例时分***空口同步方法。 The following is an example for further detailing the air interface synchronization method of the time division system according to the embodiment of the present invention.

如图 2所示，共有三个小区： Celll、 Cell2、 Cell3 , 其中 Celll 中处于连接状态的 UE有 UEll, UE12, UE13; Cell2中处于连接状态的 UE有 UE21, UE22, UE23。三个小区互为邻区关系。 As shown in Figure 2, there are three cells: Celll, Cell2, and Cell3. The UEs in the connected state of Celll have UEll, UE12, and UE13. The UEs in the connected state of Cell2 have UE21, UE22, and UE23. The three communities are adjacent to each other.

RNC ( Radio Network Controller, 无线网络控制器）通知 UE11上才艮测量报告。具体地， RNC可以定时通知 UE11上 ^艮测量 ^艮告。 The RNC (Radio Network Controller) notifies the UE11 of the measurement report. Specifically, the RNC can periodically notify the UE11 to measure the error.

RNC收到 UE11的测量报告后，对测量报告中 CELL1与各邻区之间的两小区间 SFN观测时间差进行判决。如果其中有两小区间 SFN观测时间差超过预定的第一门限值，比如对 TD-SCDMA可设为 3us, 则说明存在两基站间的时钟相位偏差超标的情况。 After receiving the measurement report of UE11, the RNC determines the time difference between the two small-area SFN observations between CELL1 and each neighboring cell in the measurement report. If the SFN observation time difference between two cells exceeds a predetermined first threshold, for example, TD-SCDMA can be set to 3us, it means that there is a case where the clock phase deviation between the two base stations exceeds the standard.

此时，为了进一步确定是哪个基站的时钟出现了失步，则 RNC对 UE12、 UE13、 UE21、 UE22、 UE23发起测量控制消息。 At this time, in order to further determine which base station's clock has lost synchronization, the RNC initiates a measurement control message to UE12, UE13, UE21, UE22, and UE23.

假设上面的判决结果是 CELL1和 CELL2之间的两小区间 SFN观测时间差超过了第一门限值，则此时 RNC可以根据 UE12、 UE13、 UE21、 UE22、 UE23上报的测量报告，分别得到各测量报告中的 CELL1和 CELL2之间的两小区间 SFN观测时间差，然后对这些两小区间 SFN观测时间差进行平均，得到 CELL1和 CELL2之间的两小区间 SFN观测时间差的均值 ν_μ2。如果该均值 ν_μ2大于预定的第二门限值（第二门限值可以和第一门限值相同，也可以不同），则 RNC还需要进一步获得各测量报告中的 CELL2和 CELL3之间的两小区间 SFN观测时间差，对这些两小区间 SFN观测时间差进行平均，得到 CELL2 和 CELL3之间的两小区间 SFN观测时间差的均值 V₂_₃。如果该均值 V₂_₃小于等于所述第二门限值，则说明 CELL1所在的基站已经失步， CELL2和 CELL3 所在的基站未失步。 Assume that the above judgment result is that the SFN observation time difference between the two cells exceeds the first threshold value between the CELL1 and the CELL2, and the RNC can obtain the respective measurements according to the measurement reports reported by the UE12, the UE13, the UE21, the UE22, and the UE23. The SFN observation time difference between the two cells between CELL1 and CELL2 is reported, and then the SFN observation time difference between the two cells is averaged to obtain the mean ν _{μ2 of the} SFN observation time difference between the two cells between CELL1 and CELL2. If the mean ν _{μ2 is} greater than a predetermined second threshold (the second threshold may be the same as the first threshold, or may be different), the RNC needs to further obtain between CELL2 and CELL3 in each measurement report. The SFN observation time difference between the two cells is averaged, and the SFN observation time difference between the two cells is averaged to obtain the mean value V ₂ _ _{3 of the} SFN observation time difference between the two cells between CELL2 and CELL3. If the average value V ₂ _ _{3 is} less than or equal to the second threshold value, it indicates that the base station where CELL1 is located has lost synchronization, and the base station where CELL2 and CELL3 are located has not lost synchronization.

当然， RNC也可以先获得各测量 4艮告中的 CELL1和 CELL3之间的两小区间 SFN观测时间差，对这些两小区间 SFN观测时间差进行平均，得到 CELL1 和 CELL3之间的两小区间 SFN观测时间差的均值 ν_μ3。如果该均值 Vi_-3小于等于所述第二门限值，则说明 CELL2所在的基站已经失步， CELL1和 CELL3 所在的基站未失步。 Of course, the RNC can also obtain the SFN observation time difference between the two cells between CELL1 and CELL3 in each measurement, and average the SFN observation time difference between the two cells to obtain the SFN observation between the two cells between CELL1 and CELL3. The mean of the time difference is ν _μ3 . If the mean Vi _{-3 is} less than or equal to the second threshold, it indicates that the base station where CELL2 is located has lost synchronization, CELL1 and CELL3. The base station where it is located has not lost synchronization.

需要说明的是，上述第一门限值和第二门限值可以根据应用需要及***的不同来设定。而且， RNC向 CELL1和 CELL2中除 UE11之外的其他处于连接状态的终端发起测量控制消息时，可以选取其中的全部或部分终端发起测量控制消息。 It should be noted that the first threshold value and the second threshold value may be set according to application requirements and systems. Moreover, when the RNC initiates a measurement control message to the terminals in the connection state other than UE11 in CELL1 and CELL2, all or a part of the terminals may initiate a measurement control message.

釆用上述检测方法检测到 Celll所在的基站失步后，对 UE21、 UE22、 UE23 测量的 Cell2和 Celll的两小区间 SFN观测时间差取平均作为对 Celll的时间校准值，即对存在时钟相位偏差的基站进行时钟相位补偿。检测 After detecting that the base station where Celll is located is out of synchronization, the SFN observation time difference between the two cells of Cell2 and Celll measured by UE21, UE22, and UE23 is averaged as a time calibration value for Celll, that is, for the presence of clock phase deviation. The base station performs clock phase compensation.

具体地，可以由 RNC通知 Celll所在的基站停止 GPS同步，并将上面计算得到的时间校准值发送给 Celll所在的基站。 Specifically, the RNC may notify the base station where Cell1 is located to stop GPS synchronization, and send the calculated time calibration value to the base station where Cell1 is located.

Celll 所在的基站的时钟模块根据所述时间校准值对该基站进行时钟校准。具体的校准过程与现有技术中类似，在此不再详细描述。 The clock module of the base station where Celll is located performs clock calibration on the base station according to the time calibration value. The specific calibration process is similar to that in the prior art and will not be described in detail herein.

由此可见，本发明实施例时分***空口同步方法，才艮据相邻小区内的多个终端上报的测量报告中的 SFN-SFN OTD进行联合判决，确定失步的基站和未失步的基站，从而可以对时钟源緩慢漂移引起的基站失步进行有效地检测，进而对失步的基站进行同步，从而实现了时分***空口同步，保障了基站的正常工作。 It can be seen that the air interface synchronization method of the time division system of the embodiment of the present invention performs joint decision according to the SFN-SFN OTD in the measurement report reported by multiple terminals in the neighboring cell to determine the out-of-synchronization base station and the unspoken base station. Therefore, the base station out-of-synchronization caused by the slow drift of the clock source can be effectively detected, and then the out-of-step base station is synchronized, thereby realizing the air interface synchronization of the time division system and ensuring the normal operation of the base station.

在实际应用中，由于两小区间 SFN观测时间差只是测量的两个不同小区到达同一终端的时间差，并没有对空口传输距离的不一致做校正，因此实际上在上述步骤 101 中，终端上报的两小区间 SFN观测时间差并不能准确反映出两个基站间的时钟相位偏差。两小区间 SFN观测时间差中包括了终端到两个小区距离不一样而引入的误差，这个误差值随终端与基站距离不一致的大小不同而不同。对于城区来说，由于基站间距较小，因此两小区间 SFN观测时间差中因距离不一致产生的误差较小，而对于郊区或农村来说由于基站间距大大增加，这种影响就会增加。 In practical applications, since the time difference of SFN observation between two cells is only the time difference between two different cells arriving at the same terminal, and the inconsistency of the air interface transmission distance is not corrected, in fact, in the above step 101, the two cells reported by the terminal The inter-SFN observation time difference does not accurately reflect the clock phase deviation between the two base stations. The SFN observation time difference between the two cells includes the error introduced by the terminal to the difference between the two cells. This error value is different depending on the distance between the terminal and the base station. For the urban area, due to the small base station spacing, the error caused by the inconsistent distance in the SFN observation time difference between the two cells is small, and this effect is increased for the suburban or rural areas due to the greatly increased base station spacing.

为此，为了减少上述误差，在上述本发明实施例时分***空口同步方法中，可以在 RNC侧来区分基站是处于城区还是郊区，针对基站所处的不同区域，设定不同的判断门限，即上述第一门限值和第二门限值，以便使***空口同步达到更好的效果。比如，从 TD-SCDMA时隙结构预留的保护间隔（GP )长度来说，如果两个基站间的两小区间 SFN观测时间差超过 16个 chip (码片）；两个基站的小区间就会产生干扰；因此，可以设定所述第一门限值 > 16 Chip。当超过一定比例（ 0% - 100% )的终端上报的两小区间 SFN观测时间差超过所述第一门限值，就可以判断基站间有可能失步。 Therefore, in order to reduce the above error, in the air interface synchronization method of the time division system according to the embodiment of the present invention, the RNC side can distinguish whether the base station is in an urban area or a suburb, and set different judgment thresholds for different areas in which the base station is located, that is, The first threshold value and the second threshold value are used to synchronize the air interface of the system to achieve better results. For example, from the guard interval (GP) length reserved by the TD-SCDMA slot structure, if the SFN observation time difference between the two base stations exceeds 16 chips (chips); Interference is generated; therefore, the first threshold value > 16 Chip can be set. When the SFN observation time difference between two cells reported by a terminal exceeding a certain ratio (0% - 100%) exceeds the first threshold, it may be determined that there is a possibility of step loss between the base stations.

TD-SCDMA ***是一个对同步精度要求较高的***，如果基站间小区时钟不同步，一方面会造成相互之间的干扰，网络 ISCP ( Interference Signal Code Power, 干扰信号码功率）会升高，另一方面由于小区间不同步，会导致小区间切换的成功率大大下降，这两个特性是时分***基站失步后的明显表现。 The TD-SCDMA system is a system that requires high synchronization accuracy. If the cell clocks between the base stations are not synchronized, interference between the two parties will occur, and the network ISCP (Interference Signal Code Power) will increase. On the other hand, due to the non-synchronization between cells, the success rate of inter-cell handover is greatly reduced. These two characteristics are obvious performances of the time-division system base station after the step-out.

因此，为了进一步减少终端到基站距离不同可能会引入的测量误差，还可以通过基站失步后的上述两种表现例如网络 ISCP和小区间切换的成功率作为辅助条件，以便更准确地判断基站是否真正失步。 Therefore, in order to further reduce the measurement error that may be introduced when the distance from the terminal to the base station is different, the above two performances such as the network ISCP and the inter-cell handover may be used as auxiliary conditions after the base station is out of synchronization, so as to more accurately determine whether the base station is Really lost.

假设确定出了失步的基站和未失步的基站，则在对失步的基站进行时钟校准之前，还可以进一步结合小区切换成功率和 /或干扰信号码功率从所述失步基站中筛选出真正处于失步状态的基站，以做更准确地判断，使得在对失步的基站进行时钟校准时，只对真正处于失步状态的基站进行时钟校准。具体地，可以有以下三种方案。 Assuming that the out-of-synchronization base station and the non-synchronized base station are determined, the cell handover success rate and/or the interference signal code power may be further filtered from the out-of-synchronization base station before the clock calibration of the out-of-synchronization base station is performed. The base station that is really out of sync is used to make a more accurate judgment, so that when the clock is calibrated for the out-of-synchronization base station, only the base station that is really in the out-of-synchronization state is clock-calibrated. Specifically, there are the following three options.

方案一：通过小区切换成功率辅助判断基站失步 Solution 1: Determine the base station out of synchronization by the cell handover success rate

在该方案中，可以设置门限参数： "切入成功率恶化相对门限"、和 /或"切出成功率恶化相对门限"，并且需要以下处理： In this scheme, the threshold parameters can be set: "cutting success rate deterioration relative threshold", and / or "cutting success rate deterioration relative threshold", and the following processing is required:

( 1 )针对所述失步基站中任意一个小区，通过计数器统计该失步基站与相邻小区的基站间切入和 /或切出成功率； (1) counting, for any one of the out-of-synchronization base stations, a handover success rate and/or a cut-out success rate between the out-of-synchronization base station and the base station of the neighboring cell by using a counter;

( 2 )统计所述失步基站所属的 RNC 内所有基站间切换切入和 /或切出平均成功率； (2) counting the average handover success rate and/or the cut-out success rate between all the base stations in the RNC to which the out-of-synchronization base station belongs;

( 3 )如果所述失步基站与相邻小区的基站间切入成功率与所述 RNC内基站间的切入平均成功率相对比值小于预设的"切入成功率恶化相对门限"，和 / 或所述失步基站与相邻小区的基站间切出成功率与所述 RNC内基站间的切出平均成功率相对比值小于预设的"切出成功率恶化相对门限"，则判定该基站真正处于失步状态。方案二：通过 ISCP辅助判断基站失步 (3) if the ratio of the success rate of the handover between the out-of-synchronization base station and the base station of the adjacent cell to the average penetration success rate between the base stations in the RNC is less than a preset "cut-through success rate relative threshold", and/or Determining that the ratio of the cut-off success rate between the base station of the out-of-synchronization base station and the neighboring cell to the average of the cut-out average rate between the base stations in the RNC is less than a preset "cut-out success rate deterioration relative threshold", determining that the base station is actually in the Out of sync state. Option 2: Determine the base station out of synchronization through ISCP assistance

在该方案中，可以设置门限参数： "ISCP恶化相对门限" ，并且需要做以下处理： In this scheme, the threshold parameter can be set: "ISCP Deterioration Relative Threshold" and the following processing is required:

( 1 )针对所述失步基站中任意一个小区，统计该小区各时隙 ISCP平均值； (1) counting, for any one of the out-of-synchronization base stations, an ISCP average value of each time slot of the cell;

( 2 )统计所述失步基站所属的 RNC内各时隙 ISCP平均值； (2) statistic the ISCP average value of each time slot in the RNC to which the out-of-synchronization base station belongs;

( 3 )如果所述 RNC内各时隙 ISCP平均值与所述小区的各时隙 ISCP平均值相对比值小于预设的 "ISCP 恶化相对门限"，则判定所述失步基站真正处于失步状态。 (3) determining that the out-of-synchronization base station is in an out-of-synchronization state if the ISCP average value of each time slot in the RNC and the ISCP average value of each time slot of the cell are smaller than a preset "ISCP deterioration relative threshold" .

方案三：通过小区切换成功率和 ISCP综合辅助判断基站失步 Solution 3: Determine the base station out of synchronization through the cell handover success rate and ISCP comprehensive assistance

在该方案中，需要设置一个门限参数"综合恶化相对门限，，和一个比例因子参数 "ISCP判断机制占比因子" ，并且需要做以下处理： In this scheme, a threshold parameter "comprehensive deterioration relative threshold," and a scale factor parameter "ISCP judgment mechanism ratio factor" need to be set, and the following processing is required:

( 1 )针对失步基站中任意一个小区统计时隙 ISCP; (1) counting time slot ISCP for any one of the out-of-synchronization base stations;

( 2 )针对失步基站中任意一个小区通过计数器统计基站间切入、切出成功率； (2) counting, by using a counter, the inter-base station cut-in and cut-out success rate for any one of the out-of-synchronization base stations;

( 3 )统计所述失步基站所属的 RNC内时隙 ISCP平均值； (3) counting the ISCP average value of the time slots in the RNC to which the out-of-synchronization base station belongs;

( 4 )统计所述失步基站所属的 RNC内基站间切换切入、切出平均成功率； (4) Statistically switch the cut-in and cut-out average success rate between the base stations in the RNC to which the out-of-synchronization base station belongs;

( 5 )如果 [所述 RNC内时隙 ISCP平均值与问题小区的各时隙 ISCP平均值相对比值 X "ISCP判断机制占比因子" + 问题小区的基站间切入成功率与所述 RNC的切入平均成功率相对比值 X ( 1 - "ISCP判断机制占比因子"） ]小于预设的"综合恶化相对门限"，则判定所述失步基站真正处于失步状态。 (5) If [the ratio of the ISCP average of the slot in the RNC to the average value of the ISCP of each slot of the problem cell X "ISCP judgment mechanism ratio factor" + the inter-base station handover success rate of the problem cell and the cut-in of the RNC The average success rate relative value X (1 - "ISCP judgment mechanism ratio factor")] is smaller than the preset "comprehensive deterioration relative threshold", and it is determined that the out-of-synchronization base station is truly in an out-of-synchronization state.

当然，本发明实施例中并不限定通过小区切换成功率和 /或 ISCP辅助判断基站失步的具体方式。 Certainly, in the embodiment of the present invention, the specific manner of determining the base station out of synchronization by the cell handover success rate and/or ISCP is not limited.

本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，所述的程序可以存储于一计算机可读取存储介质中，所述的存储介质，如： ROM/RAM、磁碟、光盘等。 A person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, the storage. Media, such as: ROM/RAM, disk, CD, etc.

相应地，本发明实施例还提供了一种 RNC, 如图 3所示，是该 RNC的一种结构示意图。 Correspondingly, an embodiment of the present invention further provides an RNC, as shown in FIG. 3, which is a schematic structural diagram of the RNC.

在该实施例中，所述 RNC包括： In this embodiment, the RNC includes:

测量报告接收单元 301 , 用于接收相邻小区内的终端上报的测量报告；检测单元 302 ,用于根据相邻小区内的终端上报的测量报告中的 SFN-SFN OTD, 确定是否有基站出现失步； a measurement report receiving unit 301, configured to receive a measurement report reported by a terminal in a neighboring cell; The detecting unit 302 is configured to determine, according to the SFN-SFN OTD in the measurement report reported by the terminal in the neighboring cell, whether the base station is out of synchronization;

同步单元 303 , 用于在所述检测单元 302确定有基站出现失步后，对失步的基站进行同步。 The synchronization unit 303 is configured to synchronize the out-of-synchronization base station after the detecting unit 302 determines that the base station is out of synchronization.

在本发明实施例中，所述检测单元 302的一种优选结构包括： In an embodiment of the present invention, a preferred structure of the detecting unit 302 includes:

第一通知子单元，用于通知所述相邻小区内的多个终端中第一终端上 >¾测量报告 , 具体可以定时通知所述多个终端中第一终端上报测量报告。 The first notification sub-unit is configured to notify the first terminal of the plurality of terminals in the neighboring cell of the measurement report, and specifically, the first terminal of the plurality of terminals may periodically report the measurement report.

第一检测子单元，用于检测所述第一终端上报的测量报告中是否第一小区和第二小区间 SFN观测时间差超过预定的第一门限值。 The first detecting sub-unit is configured to detect whether the SFN observation time difference between the first cell and the second cell exceeds a predetermined first threshold value in the measurement report reported by the first terminal.

第二通知子单元，用于在所述第一检测子单元检测到第一小区和第二小区间 SFN观测时间差超过预定的第一门限值后，向所述第一终端所在小区内的处于连接状态的其他终端及与所述第一终端所在小区相邻小区内的处于连接状态的终端所形成的组合中的多个终端发起测量控制消息。 a second notification subunit, configured to: after the first detection subunit detects that the SFN observation time difference between the first cell and the second cell exceeds a predetermined first threshold, to be in the cell where the first terminal is located A plurality of terminals in a connection state and a plurality of terminals formed in a connection state with a terminal in a cell adjacent to the cell in which the first terminal is located initiate a measurement control message.

第二检测子单元，用于检测所述组合中的多个终端上>¾的测量 ^艮告中第一小区和第二小区间 SFN观测时间差超过所述第一门限的比例超过预定的比例阔值，确定第一小区中的基站或者第二小区中的基站出现失步。 a second detecting subunit, configured to detect a measurement of >3⁄4 on the plurality of terminals in the combination, wherein a ratio of the SFN observation time difference between the first cell and the second cell exceeding the first threshold exceeds a predetermined ratio The value determines that the base station in the first cell or the base station in the second cell is out of synchronization.

如图 3所示，在本发明实施例中，所述同步单元 303的一种优选结构包括：失步基站确定子单元 331 , 用于在所述检测单元 302确定有基站出现失步后，确定失步的基站和未失步的基站； As shown in FIG. 3, in the embodiment of the present invention, a preferred structure of the synchronization unit 303 includes: an out-of-sequence base station determining sub-unit 331, configured to determine, after the detecting unit 302 determines that a base station is out of synchronization, Out-of-synchronization base station and non-synchronized base station;

时钟校准子单元 332 , 用于对失步的基站进行时钟校准。 The clock calibration subunit 332 is configured to perform clock calibration on the out-of-synchronization base station.

其中，所述失步基站确定子单元 331的一种优选结构包括： The preferred structure of the out-of-synchronization base station determining sub-unit 331 includes:

计算子单元 341 , 用于计算所述组合中一个或多个终端上的测量 ^艮告中第一小区和第二小区间 SFN观测时间差的均值，以及第一小区与除第二小区外的其他相邻小区间 SFN观测时间差的均值、第二小区与除第一小区外的其他相邻小区间 SFN观测时间差的均值； The calculating subunit 341 is configured to calculate an average value of the SFN observation time difference between the first cell and the second cell in the measurement report on the one or more terminals in the combination, and the first cell and other than the second cell The mean value of the SFN observation time difference between adjacent cells, and the mean value of the SFN observation time difference between the second cell and other neighboring cells except the first cell;

比较子单元 342, 用于分别比较各均值与预定的第二门限值，并根据比较结果确定失步的基站和未失步的基站；如果第一小区和第二小区间 SFN观测时间差的均值超过第二门限值，并且第一小区与除第二小区外的其他小区间 SFN观测时间差的均值未超过所述第二门限值，则确定第二小区中的基站失步，第一小区中的基站未失步；或者如果第一小区和第二小区间 SFN观测时间差的均值超过第二门限值，并且第二小区与除第一小区外的其他小区间 SFN 观测时间差的均值未超过所述第二门限值，则确定第一小区的基站失步，第二小区中的基站未失步。 The comparing sub-unit 342 is configured to compare each of the average values with a predetermined second threshold value, and determine an out-of-synchronization base station and a non-synchronized base station according to the comparison result; if the mean value of the SFN observation time difference between the first cell and the second cell If the second threshold is exceeded, and the mean value of the SFN observation time difference between the first cell and other cells except the second cell does not exceed the second threshold, determining that the base station in the second cell is lost Step: the base station in the first cell is not out of synchronization; or if the mean value of the SFN observation time difference between the first cell and the second cell exceeds the second threshold, and the SFN observation between the second cell and other cells except the first cell If the mean value of the time difference does not exceed the second threshold, it is determined that the base station of the first cell is out of synchronization, and the base station in the second cell is not out of step.

本发明实施例的 RNC, 根据相邻小区内的多个终端上报的测量报告中的 SFN-SFN OTD进行联合判决，确定失步的基站和未失步的基站，从而可以对时钟源緩慢漂移引起的基站失步进行有效地检测，进而对失步的基站进行同步，从而实现了时分***空口同步，保障了基站的正常工作。 The RNC in the embodiment of the present invention performs a joint decision according to the SFN-SFN OTD in the measurement report reported by multiple terminals in the neighboring cell, and determines an out-of-synchronization base station and a non-synchronized base station, so that the clock source can be slowly drifted. The base station is out of step to effectively detect, and then synchronizes the out-of-synchronization base stations, thereby realizing the air interface synchronization of the time division system, and ensuring the normal operation of the base station.

如图 4所示，是本发明实施例 RNC的另一种结构示意图。 As shown in FIG. 4, it is another schematic structural diagram of the RNC according to the embodiment of the present invention.

与图 3所示实施例不同的是，在该实施例中，所述同步单元 303进一步包括： Different from the embodiment shown in FIG. 3, in this embodiment, the synchronization unit 303 further includes:

筛选子单元 333 ,用于利用小区切换成功率和 /或干扰信号码功率从所述失步基站中筛选出真正处于失步状态的基站。 The screening subunit 333 is configured to filter, by using the cell handover success rate and/or the interference signal code power, the base station that is really out of synchronization from the out-of-synchronization base station.

相应地，所述时钟校准子单元 332, 具体用于对所述选子单元 333筛选出的真正处于失步状态的基站进行同步。 Correspondingly, the clock calibration sub-unit 332 is specifically configured to synchronize the base stations that are selected in the out-of-synchronization state that are selected by the selection sub-unit 333.

本发明实施例的 RNC, 可以进一步减少终端到基站距离不同可能会引入的测量误差，还可以通过基站失步后的上述两种表现作为辅助条件，以便更准确地判断基站是否真正失步。 The RNC of the embodiment of the present invention can further reduce the measurement error that may be introduced when the distance from the terminal to the base station is different, and can also be used as an auxiliary condition by the above two performances after the base station is out of synchronization, so as to more accurately determine whether the base station is truly out of synchronization.

在实际应用中，根据 RNC时钟源的设置情况，所述时钟校准子单元 332 可以在对失步的基站进行时钟校准时，若所述失步的基站有备份参考源时，指示所述失步的基站将本地时钟切换到所述备份参考源；或者若所述失步的基站没有备份参考源时，将失步的基站和未失步的基站之间的 SFN-SFN OTD发送给所述失步的基站，以使所述失步的基站根据接收到的 SFN-SFN OTD进行时钟校准。具体地，在第一小区中的基站失步，并且没有备份参考源时，计算与第一小区相邻的其他小区内的终端上报的测量报告中第一小区和第二小区间 SFN观测时间差的均值，并将该均值发送给第一小区中的基站，以使第一小区中的基站根据接收到的均值进行时钟校准；或者在第二小区中的基站失步，并且没有备份参考源时，计算与第二小区相邻的其他小区内的终端上报的测量报告中第一小区和第二小区间 SFN观测时间差的均值，并将该均值发送给第二小区中的基站，以使第二小区中的基站根据接收到的均值进行时钟校准。 In an actual application, according to the setting of the RNC clock source, the clock calibration sub-unit 332 may perform the clock calibration on the out-of-synchronization base station, and if the out-of-synchronization base station has a backup reference source, indicate the out-of-synchronization The base station switches the local clock to the backup reference source; or if the out-of-synchronization base station does not back up the reference source, the SFN-SFN OTD between the out-of-synchronization base station and the non-synchronized base station is sent to the lost The base station of the step, so that the out-of-synchronization base station performs clock calibration according to the received SFN-SFN OTD. Specifically, when the base station in the first cell is out of synchronization, and the reference source is not backed up, the SFN observation time difference between the first cell and the second cell in the measurement report reported by the terminal in the other cell adjacent to the first cell is calculated. Mean, and sending the average to the base station in the first cell, so that the base station in the first cell performs clock calibration according to the received mean value; or when the base station in the second cell is out of synchronization, and there is no backup reference source, Calculating an average value of the SFN observation time difference between the first cell and the second cell in the measurement report reported by the terminal in the other cell adjacent to the second cell, and sending the average value to the second A base station in a cell such that a base station in the second cell performs clock calibration based on the received mean.

需要说明的是，本发明实施例的时分***空口同步方法及设备，不仅可以适用于 TD-SCDMA, 还可适应于其他需要空口严格同步的***，如 LTE-TDD ( Long Term Evolution- Time Division Duplexing , 长期演进时分双工 ) ***, WIMAX-TDD ( Worldwide Interoperability for Microwave Access- Time Division Duplexing, 微波存取全球互通时分双工） ***等；而且不限于釆用 GPS作为基站***时钟参考基准的应用场合，也适合于釆用 IEEE ( Institute of Electrical and Electronics Engineers , 电气电子工程师协会） 1588V2标准或其他技术实现基站***时钟同步场景。 It should be noted that the air interface synchronization method and device of the time division system of the embodiment of the present invention can be applied not only to TD-SCDMA, but also to other systems that require strict synchronization of air interfaces, such as LTE-TDD (Long Term Evolution-Time Division Duplexing). , long-term evolution time division duplex system), WIMAX-TDD (Worldwide Interoperability for Microwave Access-Time Division Duplexing) system, etc.; and is not limited to the application of GPS as the base station system clock reference It is also suitable for implementing the base station system clock synchronization scenario using the IEEE ( Institute of Electrical and Electronics Engineers) 1588V2 standard or other technologies.

以上对本发明实施例进行了详细介绍，本文中应用了具体实施方式对本发明进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及设备；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本发明的限制。 The embodiments of the present invention have been described in detail above, and the present invention has been described with reference to the specific embodiments thereof. The description of the above embodiments is only for facilitating understanding of the method and device of the present invention. Meanwhile, for those skilled in the art, The present invention is not limited by the scope of the present invention.

Claims

权利要求书 Claim

1、一种时分***空口同步方法，其特征在于，包括： A time-division system air interface synchronization method, characterized in that:

根据相邻小区内的至少一个终端上报的测量报告中的两小区间 SFN观测时间差，确定是否有基站出现失步； Determining whether there is a base station out of synchronization according to the SFN observation time difference between the two cells in the measurement report reported by the at least one terminal in the neighboring cell;

2、根据权利要求 1所述的方法，其特征在于，所述如果有基站出现失步，则对失步的基站进行同步包括： 2. The method according to claim 1, wherein if the base station is out of synchronization, synchronizing the out-of-synchronization base station includes:

确定失步的基站和未失步的基站； Determining an out-of-synchronization base station

对失步的基站进行时钟校准。 Clock calibration of the out-of-synchronization base station.

3、根据权利要求 2所述的方法，其特征在于，所述根据相邻小区内的至少一个终端上报的测量报告中的两小区间 SFN观测时间差，确定是否有基站出现失步包括： The method according to claim 2, wherein the determining, according to the SFN observation time difference between the two cells in the measurement report reported by the at least one terminal in the neighboring cell, determining whether the base station is out of synchronization comprises:

通知所述相邻小区内的多个终端中第一终端上测量告； Notifying the first terminal of the plurality of terminals in the neighboring cell to measure the advertisement;

如果所述第一终端上报的测量报告中第一小区和第二小区间 SFN观测时间差超过预定的第一门限值，则向所述第一终端所在小区内的处于连接状态的其他终端及与所述第一终端所在小区相邻小区内的处于连接状态的终端所形成的组合中的多个终端发起测量控制消息； If the SFN observation time difference between the first cell and the second cell in the measurement report reported by the first terminal exceeds a predetermined first threshold, the other terminals in the connected state in the cell where the first terminal is located and The plurality of terminals in the combination formed by the terminals in the connected state in the neighboring cell of the cell where the first terminal is located initiate a measurement control message;

接收所述组合中的多个终端上报的测量报告； Receiving a measurement report reported by a plurality of terminals in the combination;

如果接收到的测量报告中第一小区和第二小区间 SFN观测时间差超过所述第一门限的比例超过预定的比例阔值，则确定第一小区中的基站或者第二小区中的基站出现失步。 Determining whether the base station in the first cell or the base station in the second cell is lost if the ratio of the SFN observation time difference between the first cell and the second cell exceeding the first threshold exceeds a predetermined proportional threshold in the received measurement report step.

4、根据权利要求 2所述的方法，其特征在于，所述确定失步的基站和未失步的基站包括： The method according to claim 2, wherein the determining the out-of-synchronization base station and the non-synchronized base station comprises:

计算所述组合中一个或多个终端上报的测量报告中第一小区和第二小区间 SFN观测时间差的均值，以及第一小区与除第二小区外的其他相邻小区间 SFN观测时间差的均值、第二小区与除第一小区外的其他相邻小区间 SFN观测时间差的均值； Calculating an average value of the SFN observation time difference between the first cell and the second cell in the measurement report reported by one or more terminals in the combination, and an average value of the SFN observation time difference between the first cell and other neighboring cells except the second cell And an average value of the SFN observation time difference between the second cell and other neighboring cells except the first cell;

如果第一小区和第二小区间 SFN观测时间差的均值超过第二门限值，并且第一小区与除第二小区外的其他小区间 SFN观测时间差的均值未超过所述第二门限值，则确定第二小区中的基站失步，第一小区中的基站未失步；或者如果第一小区和第二小区间 SFN观测时间差的均值超过第二门限值，并且第二小区与除第一小区外的其他小区间 SFN观测时间差的均值未超过所述第二门限值，则确定第一小区的基站失步，第二小区中的基站未失步。 If the mean value of the SFN observation time difference between the first cell and the second cell exceeds a second threshold, and And the average value of the SFN observation time difference between the first cell and the other cells except the second cell does not exceed the second threshold, determining that the base station in the second cell is out of synchronization, and the base station in the first cell is not out of synchronization; Or if the mean value of the SFN observation time difference between the first cell and the second cell exceeds the second threshold, and the mean value of the SFN observation time difference between the second cell and other cells except the first cell does not exceed the second threshold Then, it is determined that the base station of the first cell is out of synchronization, and the base station in the second cell is not out of step.

5、根据权利要求 4所述的方法，其特征在于，所述对失步的基站进行同步包括： The method according to claim 4, wherein the synchronizing the out-of-synchronization base station comprises:

如果所述失步的基站有备份参考源 ,则指示所述失步的基站将本地时钟切换到所述备份参考源。 If the out-of-synchronization base station has a backup reference source, instructing the out-of-synchronization base station to switch the local clock to the backup reference source.

6、根据权利要求 4所述的方法，其特征在于，所述对失步的基站进行同步包括： 6. The method according to claim 4, wherein the synchronizing the out-of-synchronization base station comprises:

如果第一小区中的基站失步，并且没有备份参考源，则计算与第一小区相邻的其他小区内的终端上报的测量报告中第一小区和第二小区间 SFN观测时间差的均值，并将该均值发送给第一小区中的基站，以使第一小区中的基站根据接收到的均值进行时钟校准；或者 If the base station in the first cell is out of synchronization, and the reference source is not backed up, the average value of the SFN observation time difference between the first cell and the second cell in the measurement report reported by the terminal in the other cell adjacent to the first cell is calculated, and Transmitting the average to the base station in the first cell, so that the base station in the first cell performs clock calibration according to the received mean value; or

如果第二小区中的基站失步，并且没有备份参考源，则计算与第二小区相邻的其他小区内的终端上报的测量报告中第一小区和第二小区间 SFN观测时间差的均值，并将该均值发送给第二小区中的基站，以使第二小区中的基站根据接收到的均值进行时钟校准。 If the base station in the second cell is out of synchronization and does not back up the reference source, calculate an average value of the SFN observation time difference between the first cell and the second cell in the measurement report reported by the terminal in the other cell adjacent to the second cell, and The average is sent to the base station in the second cell, so that the base station in the second cell performs clock calibration according to the received mean.

7、根据权利要求 2至 6任一项所述的方法，其特征在于，所述方法还包括： The method according to any one of claims 2 to 6, wherein the method further comprises:

在对失步基站进行时钟校准之前，利用小区切换成功率和 /或干扰信号码功率从所述失步基站中选出真正处于失步状态的基站； Before the clock calibration of the out-of-synchronization base station, the base station is successfully selected from the out-of-synchronization base station by using the cell handover success rate and/or the interference signal code power;

所述对失步基站进行时钟校准包括：对筛选出的真正处于失步状态的基站进行时钟校准。 The clock calibration of the out-of-synchronization base station includes: performing clock calibration on the selected base station that is really out of synchronization.

8、一种时分***空口同步设备，其特征在于，包括： 8. A time division system air interface synchronization device, comprising:

测量报告接收单元，用于接收相邻小区内的至少一个终端上报的测量报告. The measurement report receiving unit is configured to receive a measurement report reported by at least one terminal in the neighboring cell.

检测单元，用于根据相邻小区内的终端上报的测量报告中的两小区间 SFN 观测时间差，确定是否有基站出现失步； a detecting unit, configured to detect SFN between two cells according to a measurement report reported by a terminal in a neighboring cell Observe the time difference to determine if there is a base station out of synchronization;

9、根据权利要求 8所述的设备，其特征在于，所述同步单元包括：失步基站确定子单元，用于在所述检测单元检测到有基站出现失步后，确定失步的基站和未失步的基站； The device according to claim 8, wherein the synchronization unit comprises: an out-of-sequence base station determining subunit, configured to determine an out-of-synchronization base station and after the detecting unit detects that a base station is out of synchronization a base station that has not lost synchronization;

时钟校准子单元，用于对失步的基站进行时钟校准。 A clock calibration subunit for clock calibration of an out-of-synchronization base station.

10、根据权利要求 9所述的设备，其特征在于，所述检测单元包括：第一通知子单元，用于通知所述相邻小区内的多个终端中第一终端上 >¾测量报告； The device according to claim 9, wherein the detecting unit comprises: a first notification subunit, configured to notify the first terminal of the plurality of terminals in the neighboring cell of a measurement report;

第一检测子单元，用于检测所述第一终端上报的测量报告中是否第一小区和第二小区间 SFN观测时间差超过预定的第一门限值； a first detecting subunit, configured to detect whether a SFN observation time difference between the first cell and the second cell exceeds a predetermined first threshold value in the measurement report reported by the first terminal;

第二通知子单元，用于在所述第一检测子单元检测到第一小区和第二小区间 SFN观测时间差超过预定的第一门限值后，向所述第一终端所在小区内的处于连接状态的其他终端及与所述第一终端所在小区相邻小区内的处于连接状态的终端所形成的组合中的多个终端发起测量控制消息； a second notification subunit, configured to: after the first detection subunit detects that the SFN observation time difference between the first cell and the second cell exceeds a predetermined first threshold, to be in the cell where the first terminal is located a plurality of terminals in a connection state and a plurality of terminals formed in a connection state with a terminal in a cell adjacent to the cell in which the first terminal is located initiate a measurement control message;

11、根据权利要求 10所述的设备，其特征在于，所述失步基站确定子单元包括： The device according to claim 10, wherein the out-of-sequence base station determining sub-unit comprises:

计算子单元，用于计算所述组合中多个终端上的测量 ^艮告中第一小区和第二小区间 SFN观测时间差的均值，以及第一小区与除第二小区外的其他相邻小区间 SFN观测时间差的均值、第二小区与除第一小区外的其他相邻小区间 SFN观测时间差的均值； a calculating subunit, configured to calculate an average value of the SFN observation time difference between the first cell and the second cell in the measurement report on the multiple terminals in the combination, and the first cell and other neighboring cells except the second cell The mean value of the inter-SFN observation time difference, the mean value of the SFN observation time difference between the second cell and other neighboring cells except the first cell;

比较子单元，用于分别比较各均值与预定的第二门限值，并根据比较结果确定失步的基站和未失步的基站；如果第一小区和第二小区间 SFN观测时间差的均值超过第二门限值，并且第一小区与除第二小区外的其他小区间 SFN 观测时间差的均值未超过所述第二门限值，则确定第二小区中的基站失步，第一小区中的基站未失步；或者如果第一小区和第二小区间 SFN观测时间差的均值超过第二门限值，并且第二小区与除第一小区外的其他小区间 SFN观测时间差的均值未超过所述第二门限值，则确定第一小区的基站失步，第二小区中的基站未失步。 Comparing subunits for respectively comparing each mean value with a predetermined second threshold value, and determining an out-of-synchronization base station and a non-synchronized base station according to the comparison result; if the mean value of the SFN observation time difference between the first cell and the second cell exceeds a second threshold, and determining, by the second cell, that the average value of the SFN observation time difference between the first cell and the other cells except the second cell does not exceed the second threshold, determining that the base station in the second cell is out of synchronization, The base station in a cell is not out of synchronization; or if the mean value of the SFN observation time difference between the first cell and the second cell exceeds the second threshold, and the mean value of the SFN observation time difference between the second cell and other cells except the first cell If the second threshold is not exceeded, it is determined that the base station of the first cell is out of synchronization, and the base station in the second cell is not out of step.

12、根据权利要求 11所述的设备，其特征在于， 12. Apparatus according to claim 11 wherein:

所述时钟校准子单元，对失步的基站进行时钟校准时，若所述失步的基站有备份参考源，指示所述失步的基站将本地时钟切换到所述备份参考源。 The clock calibration sub-unit performs clock calibration on the out-of-step base station, and if the out-of-synchronization base station has a backup reference source, instructs the out-of-synchronization base station to switch the local clock to the backup reference source.

13、根据权利要求 11所述的设备，其特征在于， 13. Apparatus according to claim 11 wherein:

所述时钟校准子单元，对失步的基站进行时钟校准时，若第一小区中的基站失步，并且没有备份参考源，计算与第一小区相邻的其他小区内的终端上报的测量报告中第一小区和第二小区间 SFN观测时间差的均值，并将该均值发送给第一小区中的基站，以使第一小区中的基站根据接收到的均值进行时钟校准；或者若第二小区中的基站失步，并且没有备份参考源，计算与第二小区相邻的其他小区内的终端上报的测量报告中第一小区和第二小区间 SFN观测时间差的均值，并将该均值发送给第二小区中的基站，以使第二小区中的基站根据接收到的均值进行时钟校准。 The clock calibration sub-unit performs a clock calibration on the out-of-synchronization base station, and if the base station in the first cell is out of synchronization and does not back up the reference source, the measurement report reported by the terminal in the other cell adjacent to the first cell is calculated. The mean value of the SFN observation time difference between the first cell and the second cell, and the average value is sent to the base station in the first cell, so that the base station in the first cell performs clock calibration according to the received mean value; or if the second cell The base station in the network is out of synchronization, and the reference source is not backed up, and the average value of the SFN observation time difference between the first cell and the second cell in the measurement report reported by the terminal in the other cell adjacent to the second cell is calculated, and the average value is sent to A base station in the second cell, such that the base station in the second cell performs clock calibration based on the received mean.

14、根据权利要求 9至 12任一项所述的设备，其特征在于，所述同步单元还包括： The device according to any one of claims 9 to 12, wherein the synchronization unit further comprises:

筛选子单元，用于利用小区切换成功率和 /或干扰信号码功率从所述失步基站中筛选出真正处于失步状态的基站； a screening subunit, configured to use the cell handover success rate and/or the interference signal code power to select a base station that is really out of synchronization from the out-of-synchronization base station;

所述时钟校准子单元，具体用于对选出的真正处于失步状态的基站进行同步。 The clock calibration sub-unit is specifically configured to synchronize the selected base stations that are truly out of synchronization.

15、根据权利要求 8至 14任一项所述的设备，其特征在于，所述设备为无线网络控制器。 The device according to any one of claims 8 to 14, wherein the device is a radio network controller.

16、一种时分***，其特征在于，包括如权利要求 8-15 中任一项所述的时分***同步设备。 A time division system, comprising the time division system synchronization device according to any one of claims 8-15.