CN101668333B - Clock synchronization method and base station - Google Patents

Clock synchronization method and base station Download PDF

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CN101668333B
CN101668333B CN 200910174565 CN200910174565A CN101668333B CN 101668333 B CN101668333 B CN 101668333B CN 200910174565 CN200910174565 CN 200910174565 CN 200910174565 A CN200910174565 A CN 200910174565A CN 101668333 B CN101668333 B CN 101668333B
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base station
synchronization
clock
clock synchronization
information
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CN 200910174565
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CN101668333A (en
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文长春
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华为技术有限公司
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Abstract

The embodiment of the invention provides a clock synchronization method and a base station; the method comprises the following steps: the base station obtains clock synchronization information of the adjacent base station, the clock synchronization information comprises a synchronous state identification of the adjacent base station; the base station determines the synchronized adjacent base station according to the synchronous state identification of the adjacent base station; the base station chooses the adjacent base station used as a clock reference in the synchronized adjacent base stations; the base station carries out clock synchronization according to synchronization parameters of the adjacent base station used as the clock standard. By adopting the embodiment of the invention, the synchronization parameters of the synchronized adjacent base stations can be used as a synchronization reference to carry out clock synchronization without allocating with a GPS receiver, the cost is saved and the reliability and the performance of the synchronization can be improved.

Description

时钟同步方法和基站 Clock synchronization method and a base station

技术领域 FIELD

[0001] 本发明关于通信技术领域,尤其涉及一种时钟同步方法和基站。 [0001] The present invention relates to the field of communication technology, particularly to a method and a base station clock synchronization.

背景技术 Background technique

[0002]微波存取全球互通(WIMAX: Worldwide Interoperability for MicrowaveAccess)通信系统中,为了避免基站之间的干扰,方便手机终端顺利接入,多个基站之间的频率、时间需要进行同步,达到一定的精度要求。 [0002] Worldwide Interoperability for Microwave Access (WIMAX: Worldwide Interoperability for MicrowaveAccess) communication system, in order to avoid interference between base stations, mobile terminals to facilitate smooth access frequency among the plurality of base stations, the time required for synchronization to a certain accuracy requirements. [0003] 目前,基站同步大多采用全球定位系统(GPS :Global Positioning System)同步方式,移动通信系统中的各个基站都以GPS为时钟基准,从而能够实现基站之间的时钟同步。 [0003] Currently, most base stations are synchronized using a global positioning system (GPS: Global Positioning System) in a synchronized manner, a mobile communication system, each base station in both the GPS reference clock, thereby enabling the synchronization between the base station clock. 另外,还可采用互联网协议(IP :Internet Protocol)时钟同步方式,各个基站同步到同一个时钟服务器,来实现基站之间的时钟同步。 Further, use may be Internet Protocol (IP: Internet Protocol) clock synchronization, each base station clock synchronized to the same server, to achieve clock synchronization between the base stations.

[0004] 但是,发明人在实现本发明的过程中发现现有技术的缺陷在于:当采用GPS同步方式时,每个基站必须配备GPS接收器,成本相对较高,并且安装在室内的小型化基站,难以接收GPS信号,从而无法方便的提供GPS同步;当采用IP时钟同步方式时,由于IP传输网络的时延和抖动都比较大,同步精度较低,时钟抖动较大,尤其难以满足时分双工(TDD :Time Division Duplex)移动通信系统的要求。 [0004] However, the inventors found that in the process of implementing the present invention, the drawbacks of the prior art is that: When GPS synchronized manner, each base station must be equipped with GPS receivers, the cost is relatively high, and is mounted in the chamber downsizing the base station, it is difficult to receive GPS signals, and thus can not easily provide GPS synchronization; IP when clock synchronization, the IP transfer network due to the delay and jitter are large, low synchronization accuracy, clock jitter is large, it is difficult to meet the particular division duplex (TDD: Time Division duplex) mobile communication system requirements.

[0005] 可以理解的是,上述技术问题仅以WIMAX系统为例进行了说明,但在其他通信系统中,存在类似的技术问题需要解决。 [0005] It will be appreciated that the above technical problems only WIMAX system has been described as an example, but other communications systems, there are similar problems to be solved in the art.

发明内容 SUMMARY

[0006] 本发明实施例提供一种时钟同步方法和基站,通过将已同步的相邻基站作为时钟基准进行时钟同步,不需配备GPS接收器,可以低成本实现基站的时钟同步。 Embodiment [0006] The present invention provides a method and a base station clock synchronization, clock synchronization by the neighboring base station has been synchronized with the reference clock, without equipped with GPS receivers, clock synchronization can be realized at low cost base stations.

[0007] 本发明实施例提供一种时钟同步方法,其中,该方法包括: [0007] An embodiment provides a clock synchronization method of the present invention, wherein the method comprises:

[0008] 本基站获取相邻基站的时钟同步信息,该时钟同步信息包括相邻基站的同步状态标识; [0008] The present base station acquires neighbor base station information to the clock synchronization, the clock synchronization information comprises a synchronization status of the neighboring base station identifier;

[0009] 本基站根据相邻基站的同步状态标识确定已同步的相邻基站; [0009] According to the present base station synchronization state determined neighboring base station identifier of the neighboring base station has been synchronized;

[0010] 本基站在已同步的相邻基站中选取作为时钟基准的相邻基站; [0010] The present adjacent base station has been selected as the synchronized base stations neighboring the base station clock reference;

[0011] 本基站根据作为时钟基准的相邻基站的同步参数进行时钟同步; [0011] According to the present base station as an adjacent base station clock synchronization of the reference clock synchronization parameter;

[0012] 所述时钟同步信息还包括同步状态标识对应的时钟同步级别; [0012] The clock synchronization information further comprises a synchronization clock synchronization state level corresponding to the identifier;

[0013] 所述在已同步的相邻基站中选取作为时钟基准的相邻基站,包括:在已同步的相邻基站中选取时钟同步级别比本基站的时钟同步级别闻的相邻基站作为时钟基准的相邻基站; [0013] The neighbor has been selected as the synchronized clock reference base stations neighboring base station, comprising: selecting a base station has been synchronized neighboring clock synchronization level than the level of the clock synchronization smell neighboring base-station clock reference neighboring base station;

[0014] 在根据所述已同步的相邻基站的同步参数进行时钟同步之后,所述方法还包括: [0014] After the clock synchronization in accordance with said synchronization parameters have adjacent base stations synchronized, the method further comprising:

[0015] 更新所述本基站的时钟同步信息,所述更新的时钟同步信息中的时钟同步级别低于所述作为时钟基准的相邻基站的时钟同步级别。 [0015] The present clock synchronization information to update the base station, the updated clock synchronization information to synchronize clocks as the clock synchronization level is lower than the level of a neighboring base station reference clock.

[0016] 本发明实施例提供一种基站,该基站包括:[0017] 信息获取单元,用于获取相邻基站的时钟同步信息,该时钟同步信息包括相邻基站的同步状态标识; [0016] The present invention provides a base station comprising: [0017] The information acquiring unit for acquiring information of an adjacent base station clock synchronization, the clock synchronization information comprises a synchronization status of the neighboring base station identifier;

[0018] 同步确定单元,用于根据该信息获取单元获取的相邻基站的同步状态标识确定已同步的相邻基站; [0018] The synchronization determination means according to the state of the synchronization acquisition unit acquires information identifying the neighboring base station determines a neighboring base station synchronized;

[0019] 选取单元,用于在已同步的相邻基站中选取作为时钟基准的相邻基站; [0019] selecting means for selecting a neighboring base station of the reference clock has been synchronized neighbor base stations;

[0020] 时钟同步单元,用于根据该选取单元选取的作为时钟基准的相邻基站的同步参数进行时钟同步; [0020] the clock synchronization unit, for performing clock synchronization based on the synchronization parameter selecting unit selecting the neighboring base station as a reference clock;

[0021] 所述时钟同步信息还包括同步状态标识对应的时钟同步级别; [0021] The clock synchronization information further comprises a synchronization clock synchronization state level corresponding to the identifier;

[0022] 所述选取单元具体用于:在已同步的相邻基站中选取时钟同步级别比所述基站的时钟同步级别闻的相邻基站作为时钟基准; [0022] The selecting unit is configured to: select a neighboring base station clock synchronized audible level than the level of the base station clock synchronization, as the reference clock has been synchronized neighbor base stations;

[0023] 信息更新单元,与所述时钟同步单元连接,用于更新所述基站的时钟同步信息,所述更新的时钟同步信息的时钟同步级别低于所述作为时钟基准的相邻基站的时钟同步级别。 [0023] The information updating unit, connected to said clock synchronization unit, the synchronization information for updating the clock of the base station, the updated clock synchronization information is lower than the level of the clock synchronization clock as the reference clock of the neighboring base station synchronization level.

[0024] 本发明的有益效果在于,通过将已同步的相邻基站作为时钟基准进行时钟同步,不需配备GPS接收器,可以低成本实现基站的时钟同步。 [0024] Advantageous effects of the present invention is that, by synchronizing the adjacent base station has a clock as a reference clock synchronized with the GPS receiver does not need to be realized at low cost of the base station clock synchronization.

附图说明 BRIEF DESCRIPTION

[0025] 此处所说明的附图用来提供对本发明的进一步理解,构成本申请的一部分,并不构成对本发明的限定。 [0025] The drawings described herein are provided for further understanding of the present invention, constitute a part of this application, do not limit the present invention. 在附图中: In the drawings:

[0026] 图I是本发明实施例I的时钟同步方法的流程图; [0026] Figure I is a flow chart of the method for clock synchronization in Example I embodiment of the present invention;

[0027] 图2是本发明实施例2的时钟同步方法的流程图; [0027] FIG 2 is a flowchart illustrating a clock synchronization method of the embodiment 2 of the present invention;

[0028] 图3是本发明实施例2的时钟同步方法的流程图; [0028] FIG. 3 is a flowchart illustrating a clock synchronization method of the embodiment 2 of the present invention;

[0029] 图4A是本发明实施例2的同步前的实例示意图; [0029] FIG. 4A is a schematic depiction of Example 2 before synchronization of the embodiment of the present invention;

[0030] 图4B是本发明实施例2的BS2同步到BSl的实例示意图; [0030] FIG. 4B is a BS2 Example 2 of the present invention, a schematic example synchronized to BSl;

[0031] 图4C是本发明实施例2的BS3同步到BS2的实例示意图; [0031] FIG 4C is BS3 Example 2 of the present invention to synchronize a schematic example BS2;

[0032] 图5是本发明实施例2的手机辅助BS2同步到BSl的实例示意图; [0032] FIG. 5 is a diagram of the handset assist BS2 2 BSl example embodiment of the present invention to synchronize a schematic view;

[0033] 图6是本发明实施例3的基站构成示意图; [0033] FIG. 6 is a base station according to the third embodiment of the present invention, a schematic configuration;

[0034] 图7是本发明实施例4的基站构成示意图。 [0034] FIG. 7 is an embodiment of a base station 4 of the embodiment of the present invention is constituted FIG.

具体实施方式 Detailed ways

[0035] 为使本发明的目的、技术方案和优点更加清楚明白,下面结合实施方式和附图,对本发明做进一步详细说明。 [0035] To make the objectives, technical solutions, and advantages of the present invention will become apparent from the following description and drawings in conjunction with embodiments of the present invention is described in further detail. 在此,本发明的示意性实施方式及其说明用于解释本发明,但并不作为对本发明的限定。 Here, exemplary embodiments of the present invention are used to explain the present invention but are not intended to limit the present invention. 以下参考附图对本发明进行详细说明。 Referring to the drawings the present invention will be described in detail.

[0036] 实施例I [0036] Example I

[0037] 本发明实施例提供一种时钟同步方法,如图I所示,该方法包括: [0037] The embodiments of the present invention provides a method for clock synchronization, as shown in FIG. I, the method comprising:

[0038] 步骤101,本基站犹取相邻基站的时钟同步彳目息,该时钟同步彳目息包括相邻基站的同步状态标识; [0038] Step 101, the neighboring base station still take clock synchronization information mesh left foot, the left foot mesh clock synchronization information includes synchronization state of a neighboring base station identifier;

[0039] 步骤102,本基站根据相邻基站的同步状态标识确定已同步的相邻基站; [0039] Step 102, the base station according to the present state of the synchronization identification is determined neighboring base stations synchronized neighboring base station;

[0040] 步骤103,本基站在已同步的相邻基站中选取作为时钟基准的相邻基站;[0041] 步骤104,本基站根据作为时钟基准的相邻基站的同步参数进行时钟同步。 [0040] Step 103, the neighboring base station selected as the reference clock has been synchronized neighbor base stations; [0041] Step 104, the base station synchronization according to the present clock as a synchronous clock reference parameter of neighboring base stations.

[0042] 在本实施例中,本基站可为未同步基站,相邻基站可为移动通彳目系统中本基站周 [0042] In the present embodiment, the base station can not synchronize, neighboring base stations may be present on the left foot base mesh circumferential movement system

围的基站。 Around the base station.

[0043] 在本实施例中,步骤101中本基站获取相邻基站的时钟同步信息,可采用如下方式: [0043] In the present embodiment, in step 101, the present base station acquires neighbor base station clock synchronization information, can be used in the following manner:

[0044] 接收相邻基站发送的包括该相邻基站的时钟同步信息的广播消息,以获取该相邻基站的时钟同步信息; [0044] neighboring base station receives the transmitted information includes a clock synchronization message is broadcast to the neighboring base station, the clock synchronous information for neighboring base stations;

[0045] 此外,还可通过手机辅助来进行同步,即本基站可接收本基站覆盖范围内的终端上报的包括相邻基站的时钟同步信息的扫描上报消息,以获取相邻基站的时钟同步信息。 [0045] Further, also the secondary synchronization is performed by the mobile phone, i.e. the present terminals within the base station may receive a scan coverage by the base station includes a clock synchronization information reported by the neighboring base stations report message, the clock synchronization information for neighboring base stations . 在基站覆盖浅交叠、基站之间难以接收到对方信号的情况下,采用手机辅助的方法尤其适用。 In the case of overlapping base station coverage shallow, difficult to receive the other signals between the base station using a mobile phone assisted method is especially suitable.

[0046] 在本实施例中,相邻基站的同步状态标识可为已同步或未同步的状态标识,可采用任意状态标识来表示。 [0046] In the present embodiment, the neighboring base station synchronization state identification may be represented as a synchronized or non-synchronized identifier may take any state identification. 例如,“I”表示已同步的状态,“0”表示未同步的状态。 For example, "I" indicates the synchronized state, "0" indicates that the status is not synchronized. 这样,本基站可根据同步状态标识确定相邻基站中已同步的相邻基站,将已同步的相邻基站的同步参数作为时钟同步基准。 Thus, the base station can determine the identity of the neighbor base stations neighboring base stations have been synchronized, the synchronized base station synchronization parameters of adjacent reference as the clock synchronization according to the synchronization state. 其中,该同步参数包括时间和频率。 Wherein the parameter includes a time and frequency synchronization.

[0047] 在本实施例中,步骤102中确定的已同步的相邻基站为一个时,步骤103中该未同步基站可直接选取该相邻基站作为时钟基准,在步骤104中该未同步基站根据相邻基站的同步参数进行时钟同步。 When [0047] In the present embodiment, the neighboring base station has been determined in step 102 is a synchronous, the step 103 is not directly accessible to the synchronous base station neighboring base station as a reference clock, the base station is not synchronized in step 104 the clock synchronization synchronization parameters neighboring base stations. 其中,已同步的相邻基站可以是拥有直接时钟源(即能够直接接收GPS信号进行时钟同步)的基站,也可以是根据拥有直接时钟源的基站的同步参数进行时钟同步的基站。 Wherein the base station has been synchronized to the neighboring base station may have a direct clock source (i.e., capable of receiving GPS signals direct the clock synchronization), the synchronization parameter may be based on the direct clock source has a clock synchronization of a base station of the base station.

[0048] 在本实施例中,步骤102中确定的已同步的相邻基站为一个以上时,步骤103中,首先选取已同步的相邻基站其中之一作为时钟基准的相邻基站;然后,在步骤104中,根据作为时钟基准的相邻基站的同步参数进行时钟同步。 When [0048] In the present embodiment, the neighboring base station has been synchronized as determined in step 102 more than one, step 103, first select one of the base station synchronized with adjacent neighboring base station as a reference clock; then, in step 104, the clock synchronization according to the neighboring base station as a reference clock synchronization parameters. 其中,可任意选取已同步的相邻基站其中之一作为时钟同步基准。 Wherein, optionally select one of the base stations have been synchronized as the clock synchronization adjacent reference.

[0049] 在本实施例中,本基站根据作为时钟基准的相邻基站的同步参数进行时钟同步后,可将其时钟同步状态由未同步状态更新为已同步的状态,并且可在下行广播消息中广播本基站的时钟同步信息,该时钟同步信息包括同步状态标识,以供其它未同步的基站进行时钟同步。 [0049] In the present embodiment, the base station according to the present synchronization parameters for neighboring base stations as the reference clock after the clock synchronization, clock synchronization status can be updated by the synchronization status is not synchronized state, and the message may be broadcast downlink clock synchronization information broadcast by the base station, which includes a synchronization clock synchronization status identification information for use by the other base stations are not synchronized clock synchronization.

[0050] 该方法不仅可应用于WIMAX系统,还可以应用于通用移动通信系统(UMTS :Universal Mobile Telecommunications System),码分多址(CDMA:Code-DivisionMultiple Access)、时分码分多址(TD-CDMA :Time Division, CodeDivision Multiple Access)、长期演进(LTE:Long Term Evolution)等网络系统。 [0050] This method is applicable not only WIMAX system can also be applied to Universal Mobile Telecommunications System (UMTS: Universal Mobile Telecommunications System), Code Division Multiple Access (CDMA: Code-DivisionMultiple Access), time division code division multiple access (TD- CDMA: Time Division, CodeDivision Multiple Access), long Term Evolution (LTE: long Term Evolution) and other network systems.

[0051] 由上述实施例可知,通过接收相邻基站发送的广播消息或覆盖范围内的终端上报的消息获得相邻基站的时钟同步彳目息,并将已同步的相邻基站作为时钟基准进行时钟同步,不需配备GPS接收器,可以低成本实现基站的时钟同步。 [0051] apparent from the above embodiment, the message reported by the terminal within the coverage of the base station, or a broadcast message sent by the neighbor base stations to obtain a clock synchronization message by receiving the adjacent mesh left foot, and the neighboring base stations as a synchronized clock reference for clock synchronization, the GPS receiver need not equipped, clock synchronization can be realized at low cost base stations.

[0052] 尤其是,可以解决如室内覆盖基站或小型化基站不方便接收GPS信号的情况下的时钟同步的问题,具有广泛的应用前景。 [0052] In particular, the clock synchronization problem can be solved as in the case where the indoor coverage base stations or base station convenient miniaturization of GPS signals received with a wide range of applications.

[0053] 实施例2 [0053] Example 2

[0054] 本发明实施例提供一种时钟同步方法,如图2所示,该方法包括:[0055] 步骤201,本基站获取相邻基站的时钟同步信息,该时钟同步信息包括相邻基站的同步状态标识,此外,还包括同步状态标识对应的时钟同步级别。 [0054] The embodiments of the present invention provides a method for clock synchronization, as shown in FIG. 2, the method comprising: [0055] Step 201, the base station acquires neighbor base station information to the clock synchronization, the clock synchronization information including neighboring base stations synchronization state identification, in addition, further comprising synchronization status identifier corresponding to the level of the clock synchronization.

[0056] 步骤202,本基站根据相邻基站的同步状态标识确定已同步的相邻基站。 [0056] Step 202, the base station according to the present state of the synchronization identification is determined neighboring base stations synchronized neighbor base stations.

[0057] 步骤203,本基站在已同步的相邻基站中选取作为时钟基准的相邻基站; [0057] Step 203, the neighboring base station has been selected as the synchronized base stations neighboring the base station clock reference;

[0058] 其中,可根据时钟同步级别选取作为时钟基准的相邻基站; [0058] wherein the neighboring base station may be selected as the reference clock in the clock synchronization level;

[0059] 在本实施例中,该时钟同步级别可用于标识基站时钟同步的等级,等级越高表示同步精度越高。 [0059] In the present embodiment, the clock synchronization may be used to identify the level of the base station clock synchronization level, the higher the level the higher synchronization accuracy. 这样,当在步骤202中确定的已同步的相邻基站为一个时,步骤203中可直接选取已同步的相邻基站作为时钟基准的相邻基站;当在步骤202中确定的已同步的相邻基站为一个以上时,步骤203中选取已同步的相邻基站其中之一作为时钟基准的相邻基站时,可选取时钟同步级别高的相邻基站作为时钟基准的相邻基站。 Thus, when the adjacent base station synchronization has been determined in a step 202, step 203 may be selected directly synchronized neighbor base stations neighboring base station clock as a reference; and when synchronized phase determined in step 202 when more than one neighbor base station 203 in the step of selecting one of synchronized neighbor base stations neighboring base station which is used as the reference clock, the clock synchronization can select high level of a neighboring base station as an adjacent base station clock reference. 其中,可从时钟同步级别较闻的相邻基站中任选一个;优选地,选取时钟同步级别最闻的相邻基站作为时钟基准的相邻基站,这样,可进一步提闻基站时钟同步的效果,保证时钟同步的精度。 Wherein optionally a clock synchronization from the more audible level neighbor base stations; preferably, the level of the clock synchronization select the most audible as an adjacent neighboring base station clock reference, so that the base station may be further enhanced audible clock synchronization effect to ensure the clock synchronization accuracy.

[0060] 步骤204,本基站根据作为时钟基准的相邻基站的同步参数进行时钟同步。 [0060] Step 204, the clock synchronization according to the present base station as an adjacent base station clock reference synchronization parameters.

[0061] 在本实施例中,本基站进行时钟同步后,可将当前的同步状态标识和时钟同步级别进行更新,其中,本基站的时钟同步级别低于作为时钟基准的相邻基站的时钟同步级别。 After [0061] In the present embodiment, the base station clock synchronization, and identifies the current sync state of the clock synchronization level can be updated, wherein the clock synchronization is lower than the levels of the base clock synchronous neighboring base stations as a reference clock level.

[0062] 之后,本基站可在下行广播消息中广播本基站的时钟同步信息,即同·步状态标识和时钟同步级别,以供其它未同步的基站进行时钟同步。 After [0062] This base station may broadcast the clock synchronization information by the base station in a downlink broadcast message, i.e., the same-state identification and clock synchronization steps level for other base stations are not synchronized clock synchronization.

[0063] 通过上述同步过程,可使网络内所有基站获取到同步信号。 [0063] By the above-described synchronization process, all the base stations within the network can acquire the synchronization signal. 另外,若每个基站都是基于周围同步级别较闻或者最闻的基站进行时钟同步,可进一步提闻时钟同步的效果,保证时钟同步的精度。 Further, when each base station is based on the level of the surrounding synchronization or best smell smell than the clock synchronization can be further enhanced audible effect of clock synchronization, clock synchronization accuracy assurance.

[0064] 在本实施例中,该时钟同步信息可采用任意方式来标识,例如,采用“0”表示未同步的状态,对应的同步级别置为空、或表示为十进制的“O”、或表示为十六进制的“OxFFFF”;采用“I”表示已同步的状态,可依次用1、2、3、……、N-1、N自然数来表示时钟同步级别,其中,在本实施例中,“I”表不的时钟同步级别最闻,“N”表不的时钟同步级别最低。 [0064] In the present embodiment, the clock synchronization information can be identified in any manner, e.g., a "0" indicates that the status is not synchronized, the synchronization corresponding to an empty level, or expressed as a decimal "O", or represented as hexadecimal "OxFFFF"; using "I" indicates the synchronized state, may in turn be represented by the level of the clock synchronization 1,2,3, ......, N-1, N a natural number, wherein, in the present embodiment embodiment, "I" clock synchronization level table is not the most heard, "N" clock synchronization table is not the lowest level. 例如,时钟同步信息中的同步状态标识为1,且时钟同步级别为1,则表示该基站为时钟同步级别为I的已同步基站,并且该基站拥有直接同步源,其时钟同步级别最闻。 For example, clock synchronization information to the synchronization state is identified as 1, and the clock synchronization level is 1, it indicates that the base station clock synchronization level I have synchronized base stations, and the base station have direct synchronization source, which clock synchronization level most smell.

[0065] 此外,为了简化设置,还可直接采用0/0xFFFF、l、2、3、……、N_1、N来同时表示时钟同步状态和时钟同步级别。 [0065] Further, in order to simplify the setting, may be used directly 0 / 0xFFFF, l, 2,3, ......, N_1, N simultaneously represent clock synchronization and clock synchronization state level. 例如,“0/0xFFFF”可表示未同步的状态;从I到N的自然数即可表示已同步的状态,又可表示对应的时钟同步级别,并且从I到N,时钟同步级别逐渐降低。 For example, "0 / 0xFFFF" may represent a state of non-synchronization; a natural number from I to N to represent the synchronized state, but also indicates the level corresponding to the clock synchronization, and from I to N, the clock synchronization level gradually decreased. 例如,当时钟同步信息中包括信息“I”时,表示该基站为时钟同步级别为I的已同步基站,并且该基站拥有直接同步源,其时钟同步级别最高;当时钟同步信息中包括信息“2”时,表示该基站的时钟同步级别低于拥有直接时钟同步源的基站,依次类推。 For example, when the clock synchronization information includes information of "I", indicating that the base station clock synchronization level I is synchronized base stations, and the base station have direct synchronization source, the maximum clock synchronization level; when the clock synchronization information includes information of " 2 ", it represents the clock synchronization is lower than the level of the base station has a direct source of clock synchronization, and so on.

[0066] 在本实施例中,为了防止已同步的基站经过长时间后基站时钟漂移,该基站还可对该基站的同步参数进行修正。 [0066] In the present embodiment, in order to prevent the base station has a base station clock drift after prolonged synchronization, the base station may also be synchronization parameters of the correction of the base station.

[0067] 在本实施例中,可采用如下方式进行修正:该待修正基站可定期扫描相邻基站的下行信号,以获取相邻基站的时钟同步信息,该时钟同步信息可包括同步状态标识和时钟同步级别;确定时钟同步级别闻于该待修正的基站的时钟同步级别的邻区基站;根据确定的相邻基站的同步参数修正该待修正基站的同步参数,其中,同步参数可以为时间或频率。 [0067] In the present embodiment, the correction can be performed as follows: The base station may periodically scan to be corrected downlink signals of adjacent base stations to obtain information about neighboring base stations clock synchronization, the clock synchronization information may include identification and synchronization status clock synchronization level; determining the level of smell in the clock synchronization neighboring base station clock synchronization level of the base station to be corrected; correction station synchronization parameter to be corrected according to the synchronization parameters determined neighboring base stations, wherein the synchronization parameter may be a time or frequency.

[0068] 此外,还可采用终端辅助进行同步参数的修正,具体为:该基站接收覆盖范围内的终端上报的该基站与相邻基站的同步偏差和相邻基站的时钟同步信息;确定时钟同步级别闻于该基站的时钟同步级别的相邻基站;根据确定的该相邻基站同步参数、以及该基站与确定的相邻基站的同步偏差修正该基站的同步参数。 [0068] In addition, the terminal may also be used for secondary correction of synchronization parameters, in particular: the clock synchronization information reported by a terminal within the coverage area of ​​the base station receiving the synchronization deviation by the base station and the neighboring base station and neighboring base stations; determining clock synchronization level clock synchronization level heard in the neighboring base station; station synchronization parameters, and a synchronization deviation of the base station and neighboring base stations to determine the parameters of the base station synchronization correction based on the determination of the neighbor. 其中,该同步偏差包括时间偏差和频率偏差。 Wherein the time offset comprising a deviation synchronization and frequency offset. 在基站覆盖浅交叠、基站之间难以接收到对方信号的情况下,采用终端辅助修正的方案尤其适用。 In the case of overlapping base station coverage shallow, difficult to receive other signals between the base stations, the terminal uses the assist correction scheme is particularly suitable.

[0069] 以下结合附图3以基站为在WMX移动通信系统中未同步的基站为例进行说明。 [0069] 3 in conjunction with the drawings as a base station in a mobile communication system WMX unsynchronized example.

[0070] 如图3所示,该方法包括: [0070] As shown in FIG. 3, the method comprising:

[0071] 步骤301,未同步的基站A可在启动的时候,进入接收状态,获取相邻基站的时钟同步信息,该时钟同步信息可包括同步状态标识和时钟同步级别; [0071] Step 301, the base station A may be unsynchronized startup into the reception state, acquires information of an adjacent base station clock synchronization, the clock synchronization state identification information may include synchronization and clock synchronization level;

[0072] 在本实施例中,获取相邻基站的时钟同步信息的方式如实施例I所述,此处不再赘述。 [0072] In the present embodiment, the clock synchronization information acquiring neighboring base stations manner as in Example I, is not repeated here.

[0073] 在本实施例中,采用实施例2中简化设置的标识,即0/0xFFFF、l、2、3、……、N_1、N来同时表示时钟同步状态和时钟同步级别。 [0073] In the present embodiment, using a simplified identification provided in Example 2, i.e., 0 / 0xFFFF, l, 2,3, ......, N_1, N simultaneously represent clock synchronization and clock synchronization state level. 其中,“ 0/0xFFFF”表示未同步的状态,其同步级别最低;1至N依次表示该基站为已同步的状态,且其同步级别分别为I至N,并且级别依次降低。 Wherein, "0 / 0xFFFF" shows a state unsynchronized, which is the lowest level of synchronization; 1 to N are sequentially represented as the base station is synchronized, the synchronization level and which are I to N, and the level in descending order.

[0074] 步骤302,基站A根据相邻基站的时钟同步彳目息确定已同步的相邻基站。 [0074] Step 302, the base station A in accordance with a clock synchronized neighbor base station information to determine left foot mesh synchronized neighbor base stations.

[0075] 在本步骤中,当接收到的相邻基站的时钟同步信息为I至N时,可确定相邻基站已同步;并且确定的已同步的相邻基站可能为一个,也可能为一个以上。 [0075] In this step, when the clock synchronization information received from the neighboring base station is I to N, it may be determined neighboring base station synchronized; and the determined neighboring base station synced may be one, or may be a the above.

[0076] 步骤303,基站A在已同步的相邻基站中选取作为时钟基准的相邻基站。 [0076] Step 303, the neighboring base station A has been selected as the synchronized base stations neighboring the base station clock reference.

[0077] 在本步骤中,若已同步的相邻基站只有一个,则基站A直接将已同步的相邻基站作为时钟同步基准; [0077] In this step, the adjacent sync base stations Ruoyi only one, the base station A is directly synchronized to neighboring base stations as a reference clock synchronization;

[0078] 若已同步的相邻基站为一个以上,则基站A可选取其中同步级别最闻的相邻基站,例如,基站B作为时钟同步基准。 [0078] Ruoyi synchronous neighboring base stations is more than one, wherein the base station A may select the most audible sync level neighbor base station, e.g., base station B as the clock synchronization reference.

[0079] 步骤304,基站A根据作为时钟基准的相邻基站的同步参数进行时钟同步; [0079] Step 304, the base station A in accordance with the synchronous clock as a synchronous clock reference parameters of neighboring base stations;

[0080] 在本实施例中,基站A根据作为时钟基准的相邻基站B的同步参数,例如时间、频率进行时钟同步。 [0080] In the present embodiment, the base station A synchronization based on parameters of neighboring base stations B as the synchronous clock reference, such as time, frequency clock.

[0081] 步骤305,基站A更新其时钟同步信息; [0081] Step 305, the base station A updates its clock synchronization information;

[0082] 在本步骤中,基站A进行时钟同步后,可更新其时钟同步信息,并且更新后的时钟同步级别低于作为时钟基准的已同步的相邻基站B的时钟同步级别。 After [0082] In this step, the base station A clock synchronization, clock synchronization information which can be updated, and the updated synchronization clock as the clock reference level is lower than the level of the clock synchronization of the base station B adjacent synchronized.

[0083] 例如,在进彳丁时钟同步之如,基站A的时钟同步级别最低,已同步的相邻基站B的时钟同步级别为“2 ”,这样,基站A根据已同步的相邻基站B进行时钟同步后,将其时钟同步级别更新为“3”。 [0083] For example, as the stimulation was butoxy clock, clock synchronization minimum level of base station A, base station B is adjacent to the synchronous clock synchronized synchronization level is "2", so that, according to the base station A is adjacent synchronized base stations B after clock synchronization, clock synchronization level it is updated to "3." 其中,“3”也表示时钟同步状态为已同步的状态。 Wherein, "3" said clock synchronization state is synchronized state.

[0084] 步骤306,基站A发送广播消息,该广播消息包括基站A的时钟同步信息; [0084] Step 306, the base station A transmits a broadcast message, the broadcast message includes a base station A clock synchronization information;

[0085] 在本步骤中,通过广播基站A的时钟同步信息,使得通信系统中与基站A相邻的其它未同步的基站可以获知基站A的同步情况。 [0085] In this step, the clock synchronization information broadcast by the base station A, so that the other base stations are not synchronized with the base station of the communication system A can be adjacent to the base station A is known synchronization.

[0086] 为了防止长时间后基站时钟漂移,还可对当前基站进行同步修正,进一步提高同步精度。 [0086] In order to prevent the long time base clock drift, the base station may be synchronized to the current correction, to further improve the synchronization precision. 因此,该方法还包括: Thus, the method further comprising:

[0087] 步骤307,对基站A的同步参数进行修正; [0087] Step 307, the base station A to the synchronization parameter is corrected;

[0088] 在本步骤中,对基站A的同步参数进行修正可采用如下所述的方式:可定期扫描相邻基站的下行信号,以获取相邻基站的时钟同步信息来进行修正,该时钟同步信息包括同步状态标识和时钟同步级别;确定作为时钟基准的相邻基站,例如确定基站C作为时钟基准,该相邻基站C的时钟同步级别为“1”,闻于该待修正的基站A的时钟同步级别“3”;根据确定的相邻基站C的同步参数修正该基站的同步参数。 [0088] In this step, the base station A synchronization parameter can be corrected in the manner as follows: periodically scan the neighboring base station downlink signal to obtain a clock synchronization information to a neighboring base station corrects the clock synchronization state identification information includes a synchronization and clock synchronization level; determining a neighboring base station as the reference clock, for example, determining the base station C as the reference clock, the clock synchronization level adjacent base station C is "1", the base station a to be heard in the corrected clock synchronization level "3"; the correction of the synchronization parameter according to the determined base station synchronization parameters of neighboring base stations C.

[0089] 此外,还可采用终端辅助进行同步参数的修正,具体为:基站A接收覆盖范围内的终端M上报的基站A与相邻基站的同步偏差和相邻基站的时钟同步信息;确定时钟同步级别闻于该基站的时钟同步级别的相邻基站C,该基站C的时钟同步级别为“1”,闻于该待修正的基站A的时钟同步级别“3”;根据确定的该相邻基站C的同步参数、以及基站A与确定的相邻基站C的同步偏差修正基站A的同步参数。 [0089] In addition, the terminal may also be used for secondary correction of synchronization parameters, in particular: the clock synchronization information deviation of M in the terminal A receives coverage of the base station reported by the base station A and the neighboring base station and neighboring base stations; determining clock Wen synchronization level in the synchronization level of the clock of the base station neighboring base station C, the clock synchronization level of the base station C is "1", the level of smell in the clock synchronization to be corrected base station a "3"; according to the determined neighboring synchronization parameter base station C, station a and the synchronization mismatch, and neighboring base station C determined the base station a synchronization parameter correction. 其中,该同步偏差包括时间偏差和频率偏差。 Wherein the time offset comprising a deviation synchronization and frequency offset. 在基站覆盖浅交叠、基站之间难以接收到对方信号的情况下,采用终端辅助进行同步参数的修正尤其适用。 In the case of overlapping base station coverage shallow, difficult to receive other signals between the base stations, the terminal uses the auxiliary synchronization parameter correction is particularly suitable.

[0090] 由上述实施例可知,通过上述时钟同步过程,整个网络中所有的基站都可以获取到同步彳目号,而且每个未同步的基站都可以基于其周围的时钟同步级别最闻的基站进行时钟同步,因此,保证了同步的可靠性。 [0090] apparent from the above-described embodiment, by the clock synchronization process, the entire network of base stations are all synchronized acquired left foot mesh number, and each base station may be based on an unsynchronized clock synchronization of a base station around the most audible level clock synchronization, thus ensuring the reliability of the synchronization.

[0091] 而且,本发明实施例提供的技术方案,获得的同步精度比IP时钟同步方案要高,可以满足TDD移动通信系统的需要。 [0091] Moreover, the technical solutions provided in the embodiments of the present invention, the synchronization accuracy is higher than that obtained IP clock synchronization scheme, it is necessary to meet the TDD mobile communication system.

[0092] 此外,该基站还通过定期扫描相邻基站的时钟同步信息对其同步参数进行修正,以防止基站时钟漂移。 [0092] In addition, the base station further neighboring base station by periodically scanning clock synchronization information corrects its synchronization parameters to prevent the base station clock drift. 并且,还可通过接收其覆盖范围内的终端上报的同步偏差和时钟同步信息进行修正,这样,解决了基站覆盖浅交叠、基站互相之间难以接收对方信号的情况下的同步参数的修正问题。 Fix the problem in the case where the synchronization parameters and also by receiving the synchronization and clock synchronization deviation information reported by a terminal within the coverage area of ​​the correction, so that, to solve the shallow base station coverage overlap each other is difficult to receive signals between each other the base station .

[0093] 以下结合图4A、图4B和图4C,以WMX移动通信系统中基站为未同步基站,以及该基站接收相邻基站发送的广播消息为例,对该时钟同步过程进行说明。 [0093] with reference to FIGS. 4A, 4B and 4C, the mobile communication system to a base station WMX unsynchronized base stations, and the base station receives a broadcast message sent from a neighbor base station as an example, the clock synchronization process will be described.

[0094] 如图4A所示,基站BSl为拥有直接时钟源的基站,即该基站BSl可直接接收GPS信号,以GPS信号为时钟基准,其时钟同步级别最高,其时钟同步信息为1,表示时钟同步级别为I的已同步基站;BS2为未同步的基站,其不能直接接收GPS信号。 [0094] As shown, the base station BSl to have direct clock source, i.e. the base station BSl 4A may receive direct GPS signals, the GPS signal as a reference clock, which clock synchronization highest level, which is a clock synchronization information, represents clock synchronization level I is synchronized base station; unsynchronized base station BS2, it can not receive GPS signals directly. 当BS2开始启动后,可接收其相邻基站BSl发送的广播消息,该广播消息包括时钟同步信息“I”。 When BS2 started, which may receive a broadcast message sent from a neighbor base station BSl, the broadcast message includes a clock synchronization information "I". BS2接收到该广播消息后,可根据该BSl的时钟同步信息确定已同步的基站BS1。 After BS2 receiving the broadcast message, the base station BS1 may be determined according to the synchronized clock synchronization information to the BSl. 然后,根据BSl的同步参数,即频率和时间进行时钟同步,并更新其时钟同步信息,其时钟同步级别低于BSl的时钟同步级别,该基站BS2的时钟同步级别为“2”,如图4B所示。 Then, in accordance with synchronization parameters BSl, i.e. frequency and time for clock synchronization, clock synchronization and update information, which level is lower than the clock synchronization level BSl clock synchronization, the clock synchronization level of the base station BS2 is "2", as shown in FIG 4B Fig.

[0095] 当BS2已同步后,可发送广播消息,该广播消息包括表示时钟同步状态和时钟同步级别的时钟同步信息“2”。 [0095] Once synchronized BS2 may send a broadcast message, the broadcast message includes a clock synchronization and clock synchronization state level clock synchronization information "2." 此时,当未同步基站BS3接收到其相邻基站BS2发送的该广播消息后,可根据该BS2的时钟同步信息确定已同步的基站BS2。 At this time, when not synchronized to the base station BS3 receives the broadcast message transmitted from its neighboring base station BS2, may be determined according to the synchronized base station BS2 of the clock synchronization information BS2. 然后,根据BS2的同步参数进行时钟同步,并更新其时钟同步信息,其时钟同步级别低于BS2的时钟同步级别,该基站BS3的时钟同步级别为“3”,如图4C所示。 Then, according to the synchronization parameter BS2 clock synchronization, clock synchronization and update information, which level is lower than the clock synchronization of clock synchronization level BS2, BS3 base station clock synchronization level is "3", shown in Figure 4C. 这样,可使用广播的方式,使少量拥有同步源的基站能够将同步源逐级扩散,使得整个网络中所有基站都可以获取到同步信号。 Thus, using a broadcast manner, so that the base station has a small amount of the source can be synchronized synchronization source diffusion cascade, so that all base stations throughout the network may acquire the synchronization signal.

[0096] 为了防止长时间后基站时钟漂移,BS2和BS3在同步后,还可定期或不定期地扫描时钟同步级别高于自己的相邻基站的下行信号,根据扫描到的下行信号获取相邻基站的时钟同步信息,并且根据时钟同步级别高的相邻基站的同步参数来修正自己的同步参数。 [0096] In order to prevent clock drift after prolonged station, BS2 and BS3 after synchronization, may be regularly or irregularly scan clock synchronization downlink signal level is higher than their neighboring base stations, the downlink signals of adjacent scan obtained according to clock synchronization information of the base station, and to modify their parameters according to the synchronization clock synchronization parameter high level of synchronization neighboring base stations.

[0097] 此外,在基站覆盖浅交叠,基站之间难以相互接收对方信号的情况下,还可以采用终端来辅助同步。 [0097] Further, in the case where the shallow base station coverage overlap each other is difficult to receive a signal other base stations, the terminal may also be employed to assist in synchronization. 以下结合图5,以WMX移动通信系统中,当前基站为未同步的基站、终端为手机为例,对该时钟同步过程进行说明。 Below in conjunction with FIG. 5, a mobile communication system to WMX, the current base station is not synchronized, a mobile phone terminal as an example, the clock synchronization process will be described.

[0098] 如图5所示,基站BSl为拥有直接时钟源的基站,即该基站BSl可直接接收GPS信号,以GPS信号为时钟基准,其时钟同步级别最高,其时钟同步信息为1,表示时钟同步级别为I的已同步基站;BS2为未同步的基站,其不能直接接收GPS信号,时钟同步级别最低,如为“O”。 [0098] As shown, the base station BSl to have direct clock source, i.e. the base station BSl 5 may receive direct GPS signals, the GPS signal as a reference clock, which clock synchronization highest level, which is a clock synchronization information, represents clock synchronization level I is synchronized base station; unsynchronized base station BS2, it can not receive direct GPS signals, clock synchronization minimum level, such as "O". BSl和BS2之间由于覆盖浅交替,相互之间不能接收对方信号。 Since the cover between BSl and BS2 are alternately shallow, the other party can not receive signals between each other.

[0099] 如图5所示,当位于BSl和BS2覆盖范围内的手机扫描周围邻区后,可将BSl的时钟同步信息发送给BS2 ;BS2接收到BSl的时钟同步信息后,可根据该BSl的时钟同步信息确定已同步的基站BS1。 [0099] As shown, when positioned around BSL and mobile scanning the neighbor BS2 coverage, 5 BSl may send clock synchronization information to the BS2; BS2 after receiving the clock synchronization information BSL, according to the BSL the base station BS1 determines the clock synchronization information synchronized. 然后,根据BSl的同步参数进行时钟同步,并更新其自身时钟同步信息,其时钟同步级别低于BSl的时钟同步级别,该基站BS2的时钟同步级别为“2”。 Then, according to the synchronization parameter BSl clock synchronization, clock synchronization and updates its own information, which level is lower than the clock synchronization level BSl clock synchronization, the clock synchronization level of the base station BS2 is "2." [0100] 为了防止长时间后基站时钟漂移,BS2在同步后,还可定期或不定期地接收覆盖范围内的手机上报的BS2与BSl的同步偏差、以及BSl的时钟同步信息;然后,根据时钟同步级别高的基站BSl的同步参数、以及该基站BS2和BSl之间的同步偏差修正BS2的同步参数。 [0100] In order to prevent clock drift after prolonged station, BS2 after synchronization, may also be received regularly or irregularly in the range reported by phone synchronization mismatch BSl and BS2, and the clock synchronization information BSl cover; then, according to a clock high level of synchronization of synchronization parameters the base station BSl, and the synchronization mismatch between the base station BSl and BS2 synchronization correction parameter BS2.

[0101] 由上述实施例可知,通过将已同步的相邻基站的同步参数作为同步基准进行时钟同步,不需配备GPS接收器,可节约成本,提高同步的可靠性。 [0101] apparent from the above embodiment, the synchronization parameter by the adjacent base station has a clock synchronized with the reference synchronization synchronization without equipped with GPS receivers, the cost savings and improve the synchronization reliability.

[0102] 而且,本发明实施例提供的技术方案以同步级别高的相邻基站作为基准来进行时钟同步或纠正同步偏差,因此,同步精度比较高,可以弥补IP时钟同步精度低的问题,尤其符合TDD移动通信系统的需要; [0102] Further, embodiments of the present invention provide a technical solution to a high level of synchronization neighboring base stations as a reference for synchronization or clock synchronization offset correction, therefore, the synchronization accuracy is relatively high, can compensate for low precision of the IP clock synchronization issues, particularly meet the needs of the TDD mobile communication system;

[0103] 此外,本发明实施例提供的技术方案通过手机辅助的方式解决了基站覆盖浅交叠、基站互相之间难以接收对方信号的情况下的时钟同步和纠正同步偏差问题。 [0103] Further, embodiments of the present invention provide a technical solution to the clock in the case where the shallow base station coverage overlap each other is difficult to receive the other signal by mobile station assisted Deviation synchronization and synchronization correction.

[0104] 实施例3 [0104] Example 3

[0105] 本发明实施例提供一种基站,如图6所示,该基站包括信息获取单元601、同步确定单元602、选取单元603和时钟同步单元604 ;其中,信息获取单元601,用于获取相邻基站的时钟同步彳目息,该时钟同步彳目息包括相邻基站的时钟同步状态标识;同步确定单兀602,用于根据信息获取单元601获取的相邻基站的时钟同步状态标识确定已同步的相邻基站;选取单兀603,用于在已同步的相邻基站中选取作为时钟基准的相邻基站; [0105] The present invention provides a base station, as shown in FIG. 6, the base station includes an information acquisition unit 601, a synchronization determining unit 602, selecting unit 603 and the clock synchronization unit 604; wherein the information obtaining unit 601, configured to obtain neighboring base station clock synchronization information mesh left foot, the left foot mesh clock synchronization information includes a clock synchronization status of the neighboring base station identity; Wu synchronization determining unit 602 for determining the clock information acquisition unit 601 acquires synchronization state of the neighboring base station identification synced neighboring base station; selecting a single Wu 603, for synchronized neighbor base stations neighboring the base station selected as the clock reference;

[0106] 时钟同步单元604,用于根据该选取单元603选取的作为时钟基准的相邻基站的同步参数进行时钟同步。 [0106] Clock synchronization unit 604, a clock synchronization according to the synchronization parameter selecting unit 603 to the neighboring base station selected as the clock reference.

[0107] 在本实施例中,该基站可为未同步基站,该相邻基站可为移动通彳目系统中该基站周围的基站。 [0107] In the present embodiment, the base station may be unsynchronized base stations, the neighboring base stations surrounding the base station may be a mobile communication system, a base station mesh left foot.

[0108] 在本实施例中,信息获取单元601获取相邻基站的时钟同步信息,该信息获取单元601可包括第一接收子单元和第一信息提取子单元;其中,该第一接收子单元用于接收相邻基站发送的包括相邻基站的时钟同步信息的广播消息;该第一信息提取子单元用于从广播消息中提取相邻基站的时钟同步信息; [0108] In the present embodiment, the clock information acquisition unit 601 acquires synchronization information of the neighboring base stations, the information acquisition unit 601 may include a first receiving sub-unit and the first sub-information extracting unit; wherein the first receiving subunit means for receiving a neighboring base station transmits a broadcast message including neighbor base station clock synchronization information; the first information extracting means for extracting a sub-clock synchronization information from neighboring base stations broadcast message;

[0109] 或者,该信息获取单元601可包括第二接收子单元和第二信息提取子单元;其中,该第二接收子单元用于接收基站覆盖范围内的终端上报的包括相邻基站的时钟同步信息的扫描上报消息;该第二信息提取子单元,用于从该第二接收子单元接收的扫描上报消息中提取相邻基站的时钟同步彳目息。 [0109] Alternatively, the information acquisition unit 601 may include a second receiving sub-unit and a second sub-information extracting unit; wherein the second sub-unit receiving a clock terminal receives a base station within a coverage area of ​​neighboring base stations reported by comprising scanning synchronization information reporting message; the second sub-information extraction unit, means for receiving from the second receiving sub-scanning report message to extract a clock synchronized left foot mesh neighboring base station information. [0110] 在本实施例中,该相邻基站的同步状态标识可为已同步或未同步的状态标识,可采用任意状态标识来表示。 [0110] In the present embodiment, the neighboring base station synchronization state identification may be represented as a synchronized or non-synchronized identifier may take any state identification. 例如,“I”表示已同步的状态,“0”表示未同步的状态。 For example, "I" indicates the synchronized state, "0" indicates that the status is not synchronized. 这样,基站可根据该同步状态标识确定相邻基站中已同步的相邻基站,将该已同步的相邻基站的同步参数作为时钟同步基准。 Thus, the base station determines a neighboring base station may be identified in the neighboring base stations are synchronized, the synchronization parameter neighboring base stations are synchronized as the clock synchronization based on the synchronization reference state. 其中,该同步参数包括时间和频率。 Wherein the parameter includes a time and frequency synchronization.

[0111] 在本实施例中,同步确定单元602中确定的已同步的相邻基站为一个时,该选取单元603可直接选取该已同步的相邻基站中作为时钟基准,该时钟同步单元604可根据该作为时钟基准的相邻基站的同步参数进行时钟同步。 [0111] In the present embodiment, the synchronization determining unit 602 adjacent synchronized base station is determined in one of a selection unit 603 may select directly adjacent to the have synchronized base stations as a reference clock, the clock synchronization unit 604 clock synchronization may be performed based on the synchronization parameter as a reference clock of a neighboring base station. 其中,该已同步的相邻基站可以是拥有直接时钟源(即能够直接接收GPS信号进行时钟同步)的基站,也可以是根据拥有直接时钟源的基站的同步参数进彳丁时钟同步的基站。 Wherein the synchronized neighboring base station may have direct clock source (i.e., capable of receiving a direct GPS clock synchronization signal) of the base station, it may be a clock synchronized stimulation was butoxy base station according to the parameters has a direct clock source for synchronization of a base station.

[0112] 在本实施例中,同步确定单元602确定的已同步的相邻基站为一个以上时,该选取单元603用于在已同步的相邻基站中选取作为时钟基准的相邻基站;该时钟同步单元604用于根据该选取单元603选取的作为时钟基准的相邻基站的同步参数进行时钟同步。 When [0112] In the present embodiment, the synchronization determination means 602 has determined the synchronization of the adjacent base station is more than one, the selecting unit 603 for synchronizing the adjacent base stations has been selected as the clock reference of the neighboring base station; the clock synchronization unit 604 for clock synchronization according to the synchronization parameter selecting unit 603 to the neighboring base station selected as the clock reference. [0113] 由上述实施例可知,基站通过接收相邻基站发送的广播消息或覆盖范围内的终端上报的消息获得相邻基站的时钟同步信息,并将已同步的相邻基站作为时钟基准进行时钟同步,不需配备GPS接收器,可节约成本。 [0113] apparent from the above embodiment, the base station clock synchronization information obtained by receiving the neighboring base stations or terminals within the coverage of base station broadcast message transmitted message reported by adjacent base stations adjacent to and synchronized clock as a reference clock synchronization without equipped with GPS receivers, the cost savings.

[0114] 而且,本发明实施例提供的技术方案解决了如室内覆盖基站或小型化基站不方便接收GPS信号的情况下的时钟同步的问题,提高了时钟同步的可靠性。 [0114] Further, the present invention provides technical solutions to solve the problem of clock synchronization in the case of indoor coverage base station or base station convenient miniaturization received GPS signal, the reliability of the clock synchronization.

[0115] 实施例4 [0115] Example 4

[0116] 本发明实施例提供一种基站,如图7所示,该基站包括信息获取单元701、同步确定单元702、选取单元703和时钟同步单元704,其作用如实施例3所述,此处不再赘述。 [0116] The present invention provides a base station, shown in Figure 7, the base station includes an information acquisition unit 701, a synchronization determining unit 702, selecting unit 703 and the clock synchronization unit 704 which acts as described in Example 3, this at not repeat them.

[0117] 基于实施例3,信息获取单元701获取相邻基站的时钟同步信息中除了包括相邻基站的同步状态标识以外,还可包括同步状态标识对应的时钟同步级别。 [0117] Based on Example 3, the clock information acquisition unit 701 acquires synchronization level synchronization status information corresponding to the identification clock synchronized with neighboring base stations in addition to the synchronization state includes identifying neighboring base stations except, further comprising. 其中,该时钟同步信息可采用任意方式来标识,如实施例2所述,此处不再赘述。 Wherein the clock synchronization information can be identified in any manner, as described in Example 2, is not repeated here.

[0118] 在本实施例中,该时钟同步级别可用于标识基站时钟同步的等级,等级越高表示同步精度越高。 [0118] In the present embodiment, the clock synchronization may be used to identify the level of the base station clock synchronization level, the higher the level the higher synchronization accuracy. 这样,当同步确定单元702确定的已同步的相邻基站为一个以上时,选取单元703在选取已同步的相邻基站其中之一作为时钟基准的相邻基站时,可选取时钟同步级别闻的相邻基站作为时钟基准的相邻基站,这样,可进一步提闻基站时钟同步的效果,保证时钟同步的精度。 Thus, when the synchronization has been determined synchronization unit 702 determines the neighboring base station is more than one, the selecting unit 703 has selected one of the base stations adjacent to a neighboring base station as the synchronization reference clock, clock synchronization can select the level of smell neighboring base station as an adjacent base station clock reference, so that the base station may be further enhanced audible clock synchronization effect, ensure that the clock synchronization accuracy.

[0119] 在本实施例中,该基站进行时钟同步后,可将当前的同步状态标识和时钟同步级别进行更新,其中,该基站的时钟同步级别低于作为时钟基准的相邻基站的时钟同步级别。 After [0119] In the present embodiment, the base station clock synchronization, and identifies the current sync state of the clock synchronization level can be updated, wherein the clock synchronization is lower than the level of the base station clock synchronized clock reference neighboring base stations level. 这样,如图7所示,该基站还包括:信息更新单元705,与时钟同步单元704连接,用于更新该基站的时钟同步信息;并且在时钟同步信息包括时钟同步级别时,该基站的同步级别低于作为时钟基准的相邻基站的时钟同步级别。 Thus, as shown in FIG. 7, the base station further comprising: an information update unit 705, 704 is connected to the clock synchronization unit for updating the base station clock synchronization information; and when the clock synchronous information includes a clock synchronization level, synchronization of the base station as a neighboring base station is below the level of the clock synchronization clock reference level.

[0120] 在本实施例中,该基站在更新其时钟同步信息后,可在下行广播消息中广播该基站的时钟同步信息,即同步状态标识和时钟同步级别,以供其它未同步的基站进行时钟同步。 [0120] In the present embodiment, the base station after the update of the clock synchronization information may be broadcast clock synchronization information of the base station in a downlink broadcast message, i.e. the synchronization state identification and clock synchronization levels, for other base stations are not synchronized will be Clock synchronization. 这样,如图7所示,该基站还包括消息发送单元706,用于在该信息更新单元705更新时钟同步信息之后,发送包括基站的时钟同步信息的广播消息。 Thus, as shown in Figure 7, the base station further comprising a message sending unit 706, configured to, after the information update unit 705 updates the clock synchronization information, transmitting the broadcast message includes a clock synchronization information to the base station.

[0121] 由上述可知,通过上述同步过程和信息的广播,可使网络内所有基站获取到同步Ih号,若每个基站都是基于周围同步级别最闻的基站进行时钟同步,可进一步提闻时钟同步的效果,保证时钟同步的精度。 [0121] From the foregoing, by the above-described broadcast information and the synchronization process, all the base stations can obtain the synchronization Ih number within the network, each base station when the clock synchronization is performed based on the synchronization level of the most heard around the base station, and may further provide audible clock synchronization effect, to ensure the accuracy of clock synchronization.

[0122] 在本实施例中,由于该基站根据已同步的相邻基站的同步参数进行时钟同步,而没有直接同步源,并且该基站在进行时钟同步之后,可正常进行工作,为了防止经过长时间后基站时钟漂移,该基站还可对该基站的同步参数进行修正。 [0122] In the present embodiment, since the base station clock synchronization based on synchronization parameters are adjacent synchronized base stations, but there is no direct synchronization source, and the base station after performing clock synchronization, work can be performed, in order to prevent over a long after the time base clock drift, the base station may also be synchronization parameters of the correction of the base station.

[0123] 如图7所示,该基站还可包括信息修正单元707,与时钟同步单元704连接,用于对基站的同步参数进行修正。 [0123] As shown in FIG 7, the base station may also include information correcting unit 707, 704 is connected to the clock synchronization unit, the base station for synchronization parameter is corrected.

[0124] 在本实施例中,信息修正单元707用于扫描相邻基站的下行信号,获取相邻基站的时钟同步信息;确定时钟同步级别闻于该基站的时钟同步级别的相邻基站;根据确定的相邻基站的同步参数修正该基站的同步参数; [0124] In the present embodiment, the information correction unit 707 for scanning the neighboring base station downlink signal, clock synchronization information acquiring neighboring base stations; determining the level of smell in the clock synchronization clock synchronization level of the base station neighboring base station; The synchronization parameters determined neighbor base station synchronization correction parameter of the base station;

[0125] 或者该信息修正单元707用于接收基站覆盖范围内的终端上报的该基站与相邻基站的同步偏差和相邻基站的时钟同步息;确定时钟同步级别闻于该基站的时钟同步级别的相邻基站;根据确定的该基站的相邻基站同步参数、以及该基站与确定的相邻基站的同步偏差修正该基站的同步参数。 [0125] unit 707 or the information for correcting the clock synchronization error reported by the terminal within the reception coverage of base stations neighboring base station the base station and the neighboring base station and synchronization information; determining the level of smell in the clock synchronization clock synchronization level of the base station the neighboring base station; the neighbor base station synchronization parameters determined by the base station, and the base station and the synchronization mismatch determined neighboring base station the base station synchronization parameter correction.

[0126] 由上述实施例可知,通过将已同步的相邻基站的同步参数作为同步基准进行时钟同步,不需配备GPS接收器,可节约成本,提高同步的可靠性。 [0126] apparent from the above embodiment, the synchronization parameter by the adjacent base station has a clock synchronized with the reference synchronization synchronization without equipped with GPS receivers, the cost savings and improve the synchronization reliability.

[0127] 而且,本发明实施例提供的技术方案以同步级别高的相邻基站作为基准来进行时钟同步或纠正同步偏差,因此,同步精度比较高,可以弥补IP时钟同步精度低的问题,尤其符合TDD移动通信系统的需要。 [0127] Further, embodiments of the present invention provide a technical solution to a high level of synchronization neighboring base stations as a reference for synchronization or clock synchronization offset correction, therefore, the synchronization accuracy is relatively high, can compensate for low precision of the IP clock synchronization issues, particularly meet the needs of TDD mobile communication system.

[0128] 此外,本发明实施例提供的技术方案通过手机辅助的方式解决了基站覆盖浅交叠、基站互相之间难以接收对方信号的情况下的时钟同步和纠正同步偏差问题。 [0128] Further, embodiments of the present invention provide a technical solution to the clock in the case where the shallow base station coverage overlap each other is difficult to receive the other signal by mobile station assisted Deviation synchronization and synchronization correction.

[0129] 以上所述的具体实施方式,对本发明的目的、技术方案和有益效果进行了进一步详细说明,所应理解的是,以上所述仅为本发明的具体实施方式而已,并不用于限定本发明的保护范围,凡在本发明的精神和原则之内,所做的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。 [0129] The foregoing specific embodiments, objectives, technical solutions, and advantages of the invention will be further described in detail, it should be understood that the above descriptions are merely specific embodiments of the present invention, but not intended to limit the scope of the present invention, all within the spirit and principle of the present invention, any changes made, equivalent substitutions and improvements should be included within the scope of the present invention.

Claims (8)

1. 一种时钟同步方法,其特征在于,所述方法包括: 本基站获取相邻基站的时钟同步息,所述时钟同步彳目息包括相邻基站的同步状态标识; 所述本基站根据所述相邻基站的同步状态标识确定已同步的相邻基站; 所述本基站在已同步的相邻基站中选取作为时钟基准的相邻基站; 所述本基站根据作为时钟基准的相邻基站的同步参数进行时钟同步; 所述时钟同步信息还包括同步状态标识对应的时钟同步级别; 所述在已同步的相邻基站中选取作为时钟基准的相邻基站,包括:在已同步的相邻基站中选取时钟同步级别比本基站的时钟同步级别闻的相邻基站作为时钟基准的相邻基站; 在根据所述已同步的相邻基站的同步参数进行时钟同步之后,所述方法还包括: 更新所述本基站的时钟同步信息,所述更新的时钟同步信息中的时钟同步级别低于所述作为 A clock synchronization method, wherein the method comprises: The base station acquires neighbor base station clock synchronization information, said clock synchronization information includes synchronization state left foot entry identifying neighboring base stations; the base station according to the present said synchronization state determined neighboring base station identifier of a neighboring base station has been synchronized; as the selected neighboring base station of the present reference clock has been synchronized neighbor base stations; according to the present base station as a neighboring base station of the reference clock synchronization clock synchronization parameter; said clock synchronization information further includes a state flag corresponding to the synchronization clock synchronization level; neighbor base station selected as the reference clock has been synchronized neighbor base stations, comprising: a neighboring base station has been synchronized clock synchronization level than the selected level of the clock synchronization smell neighboring base-station as an adjacent base station clock reference; after clock synchronization based on the synchronization parameters of the synchronized neighboring base stations, the method further comprising: updating clock synchronization information of the present base station, the updated clock synchronization information below the level of the clock synchronization as 钟基准的相邻基站的时钟同步级别。 Clock synchronization clock reference level of neighboring base stations.
2.根据权利要求I所述的方法,其特征在于,所述本基站获取相邻基站的时钟同步信息,包括: 所述本基站接收所述相邻基站发送的包括所述相邻基站的时钟同步信息的广播消息,从所述广播消息中获取所述相邻基站的时钟同步信息;或者所述本基站接收所述本基站覆盖范围内的终端上报的包括所述相邻基站的时钟同步信息的扫描上报消息,从所述扫描上报消息中获取所述相邻基站的时钟同步信息。 2. The method as claimed in claim I, wherein said clock synchronization information by the base station acquires neighbor base stations, comprising: said neighboring base station receives the present clock comprising the neighboring base station transmitted broadcast synchronization information message, acquires the neighbor base station clock synchronization information from the broadcast message; or the present clock synchronous information includes a base station receives the neighboring base station of the terminal within the coverage of base stations reported by the present scan report message, the report message neighboring base station acquires synchronization information from the scan clock.
3.根据权利要求I所述的方法,其特征在于,所述方法还包括: 更新时钟同步信息之后,发送包括所述更新的时钟同步信息的广播消息。 3. The method as claimed in claim I, wherein said method further comprises: after updating the clock synchronization information, sending a broadcast message including the clock synchronization information updated.
4.根据权利要求I所述的方法,其特征在于,在根据所述已同步的相邻基站的同步信息进行时钟同步之后,所述方法还包括: 所述本基站扫描相邻基站的下行信号,获取所述相邻基站的时钟同步信息; 确定时钟同步级别闻于所述本基站的时钟同步级别的相邻基站; 根据确定的相邻基站的同步参数修正所述本基站的同步参数;或者, 所述本基站接收本基站覆盖范围内的终端上报的所述本基站与相邻基站的同步偏差和相邻基站的时钟同步信息; 确定时钟同步级别闻于所述本基站的时钟同步级别的相邻基站; 根据确定的所述本基站的相邻基站同步参数、以及所述本基站与确定的所述相邻基站的同步偏差修正所述本基站的同步参数。 4. The method of claim I, wherein, after the clock synchronization based on the synchronization information of the base station has been synchronized adjacent, said method further comprising: scanning the neighboring base station of the present downlink signals from base stations obtain clock synchronization information of the neighboring base stations; determining the level of smell in the clock synchronization clock synchronization level of the neighboring base station is present; the correction of the synchronization parameter by the base station according to the determined synchronization parameters of neighboring base stations; or , the present base station receives the synchronization deviation by the base station within the coverage area of ​​the terminal reported by the present base station and a neighboring base station and the neighboring base station clock synchronization information; determining a clock synchronized to the smell of this base level clock synchronization level neighboring base station; synchronization parameter correction according to the present neighboring base station synchronization parameters determined in the present base station, and the present base station and the synchronization mismatch determined neighboring base stations.
5. —种基站,其特征在于,所述基站包括: 信息获取单元,用于获取相邻基站的时钟同步信息,所述时钟同步信息包括相邻基站的同步状态标识; 同步确定单元,用于根据所述信息获取单元获取的相邻基站的同步状态标识确定已同步的相邻基站; 选取单元,用于在已同步的相邻基站中选取作为时钟基准的相邻基站; 时钟同步单元,用于根据所述选取单元选取的作为时钟基准的相邻基站的同步参数进行时钟同步;所述时钟同步信息还包括同步状态标识对应的时钟同步级别; 所述选取单元具体用于:在已同步的相邻基站中选取时钟同步级别比所述基站的时钟同步级别闻的相邻基站作为时钟基准; 信息更新单元,与所述时钟同步单元连接,用于更新所述基站的时钟同步信息,所述更新的时钟同步信息的时钟同步级别低于所述作为时钟基准的相邻基站 5. - kind of a base station, wherein the base station comprises: an information acquiring unit for acquiring information of an adjacent base station clock synchronization, the clock synchronization information comprises a synchronization status of the neighboring base station identity; synchronization determining means, for the state of the synchronization acquisition unit acquires information of the neighboring base station determines the identity of the neighboring base station has been synchronized; selecting means for selecting a neighboring base station of the reference clock has been synchronized neighbor base stations; the clock synchronization unit, with according to the synchronization parameter selection unit as the selected neighboring base station clock synchronization clock reference; said clock synchronization information further includes a state flag corresponding to the synchronization clock synchronization level; the selecting unit is configured to: synced clock synchronization level audible selected neighboring base station clock synchronization level of the adjacent base station than a base station as a reference clock; information updating means, and means connected to said clock synchronization, clock synchronization information for updating the base station, the update clock synchronization is lower than the level of the clock synchronization information of the neighboring base stations as a reference clock 时钟同步级别。 Clock synchronization level.
6.根据权利要求5所述的基站,其特征在于,所述信息获取单元包括: 第一接收子单元,用于接收所述相邻基站发送的包括所述相邻基站的时钟同步信息的广播消息; 第一信息提取子单元,用于从所述广播消息中提取所述相邻基站的时钟同步信息; 或者所述信息获取单元包括:第二接收子单元,用于接收所述基站覆盖范围内的终端上报的包括所述相邻基站的时钟同步信息的扫描上报消息; 第二信息提取子单元,用于从所述第二接收子单元接收的扫描上报消息中提取所述相邻基站的时钟同步信息。 6. The base station as claimed in claim 5, wherein the information acquiring unit comprises: a first receiving subunit, configured to receive the neighboring base station transmission include a broadcast clock synchronization information to the neighboring base station message; a first sub-information extracting unit for extracting a clock from the broadcast message synchronization information of the neighboring base station; or the information acquiring unit comprises: a second receiving subunit, configured to receive the coverage of base station reported by the terminal in the clock synchronization information comprises scanning the neighboring base stations report message; and a second sub-information extracting unit, receiving means for receiving from the second sub-scanning report message extracting the neighboring base station clock synchronization information.
7.根据权利要求5所述的基站,其特征在于,所述基站还包括: 消息发送单元,用于在所述信息更新单元更新时钟同步信息之后,发送包括所述更新的时钟同步信息的广播消息。 The base station as claimed in claim 5, wherein the base station further comprising: message transmitting means for, after the information update unit updates the clock synchronization information, comprising transmitting the broadcast information is updated clock synchronization messages.
8.根据权利要求5所述的基站,其特征在于,所述基站还包括: 信息修正单元,与所述时钟同步单元连接,用于扫描相邻基站的下行信号,获取所述相邻基站的时钟同步信息;确定时钟同步级别闻于所述基站的时钟同步级别的相邻基站;根据确定的相邻基站的同步参数修正所述基站的同步参数; 或者用于接收基站覆盖范围内的终端上报的所述基站与相邻基站的同步偏差和相邻基站的时钟同步信息;确定时钟同步级别闻于所述基站的时钟同步级别的相邻基站;根据确定的所述基站的相邻基站同步参数、以及所述基站与确定的所述相邻基站的同步偏差修正所述基站的同步参数。 The base station according to claim 5, wherein the base station further comprising: information correction unit, connected to said clock synchronization unit, a downlink signal for scanning neighboring base stations, to acquire the neighboring base station clock synchronization information; determining the level of the clock synchronization clock synchronization level heard in the neighboring base station the base station; synchronization parameter correction in accordance with the synchronization parameters determined in the base station of the neighboring base stations; receiving a base station or a terminal within the coverage report clock synchronization information deviation of the base station and the neighboring base station and neighboring base stations; determining the level of smell in the clock synchronization clock synchronization level neighbor base stations the base station; according to the neighboring base station synchronization parameter determined , and the base station and the synchronization parameters determined neighbor base station synchronization mismatch correction of the base station.
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