CN100370864C - Network element time synchronizing method in mobile communication system - Google Patents

Network element time synchronizing method in mobile communication system Download PDF

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CN100370864C
CN100370864C CN 200410048326 CN200410048326A CN100370864C CN 100370864 C CN100370864 C CN 100370864C CN 200410048326 CN200410048326 CN 200410048326 CN 200410048326 A CN200410048326 A CN 200410048326A CN 100370864 C CN100370864 C CN 100370864C
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time
network controller
radio network
rnc
nodeb
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CN1710828A (en )
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谢永斌
庆 郭
颜尧平
魏建强
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大唐移动通信设备有限公司
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Abstract

本发明涉及移动通信系统中的网元时间同步方法,应用于WCDMA或TD-SCDMA移动通信系统中,包括操作维护中心(OMC)与无线网络控制器(RNC)间的时间同步和RNC与基站(NodeB)间的时间同步。 The present invention relates to NE time synchronization method in a mobile communication system, WCDMA, or applied to TD-SCDMA mobile communication system, including time between operation and maintenance center (OMC) with a radio network controller (RNC) synchronized with the base station and the RNC ( synchronization time) between the NodeB. 以OMC的时间为基准时间时,利用SNTP协议实现让RNC的基准时间为OMC的基准时间,和利用UMTS中UTRAN的RNC与NodeB间的节点同步结果实现让NodeB的基准时间为RNC的基准时间这样的分级管理时间同步方案。 When to OMC time as the reference time, the use of SNTP protocol allows RNC reference time for the OMC reference time, and using the node synchronization results between the UMTS UTRAN RNC and NodeB realization let NodeB reference time such as the reference time of the RNC hierarchical management time synchronization scheme. 以NodeB的时间为基准时间时,利用UMTS中UTRAN的RNC与NodeB间的节点同步结果实现让RNC的基准时间为NodeB的基准时间,和利用SNTP协议实现让OMC的基准时间为RNC的基准时间这样的分级管理时间同步方案。 When to NodeB time as the reference time, using the node synchronization results between the UMTS UTRAN RNC and NodeB realization let RNC reference time for the NodeB reference time, and use SNTP protocol to let OMC reference time such as the reference time of the RNC hierarchical management time synchronization scheme. 由于充分利用了节点同步结果,实现更高精度的时间同步,且方法简单,网元开销少。 Since the full use of the node synchronization result, higher accuracy of time synchronization, and the method is simple, low cost of network element.

Description

移动通信系统中的网元时间同步方法 Mobile communication system time synchronization method NE

技术领域 FIELD

本发明涉及移动通信技术,更确切地说是涉及宽带码分多址(WCDMA)、 时分一同步码分多址(TD-SCDMA)移动通信系统中,无线网络控制器的操作维护中心(OMC-R,以下简述为操作维护中心0MC )、无线网络控制器(RNC ) 和无线网络控制器(RNC)所管理的基站(NodeB)这些移动通信系统中的网元间绝对时间(指:年月日时分秒)同步方法。 The present invention relates to a mobile communication technology, and more specifically relates to a broadband code division multiple access (WCDMA), a Time Division Synchronous Code Division Multiple (TD-SCDMA) mobile communication system, a radio network controller of the Operation and Maintenance Center (OMC- R, is briefly described below operation maintenance center 0MC), these mobile communication systems absolute time between network elements a radio network controller (RNC) and a radio network controller (RNC) managed by the base station (the NodeB) (means: date day when minutes and seconds) synchronization method.

背景技术 Background technique

移动通信系统中网元时间的同步对于整个通信网络,包括OMC, RNC, NodeB的管理都有着非常重要的意义,特别是对于系统在应用中需要使用绝对时间时,比如性能估计、告警等,则有着更重要的意义。 Synchronization for the entire communications network, including OMC, RNC, NodeB management have a mobile communication system in the NE time is very important, especially for when the system requires the use of absolute time in the application, such as performance estimates, alarm, etc., then It has a more important significance. 如果通信系统中网元的时间达不到同步,就会导致网元之间的告警数据,性能数据紊乱等。 If the communication system is time reach NE synchronization, it will lead to alerting data between network elements, performance data and other disorders.

中国无线技术协会(CWTS )通过的《WCDMA系统中时间同步的方式》 (CWTS TSG-RAN WG2meeting # 2002年),在Iub接口上采用SNTP协议, 需要在RNC侧实现SNTP的服务器端和在NodeB侧实现SNTP的客户端, 其方式是:RNC作为NodeB的上级时间管理者,需要定期地向它所管理的所有NodeB广播时延估算消息,供NodeB估算时延。 China Wireless Technology Association (CWTS) "mode WCDMA system time synchronization" via the (CWTS TSG-RAN WG2meeting # 2002), the use of SNTP protocol on the Iub interface, we need to implement server-side SNTP in the RNC side and the NodeB side SNTP client achieve its way: RNC NodeB as a superior time managers need to regularly manage it all NodeB broadcast delay estimate message, NodeB estimates for the delay.

时间同步过程由请求和响应两条消息完成:NodeB向RNC发送时延估算请求消息,RNC对NodeB发送响应应答消息,在该响应应答消息中包括时间戳信息(由SNTP协议提供),供NodeB利用时间戳信息估算传输时延。 Time synchronization request and response process is completed by the two messages: a request message sent by the NodeB to the estimated delay RNC, RNC to the NodeB transmits a response message response, a response in the response message includes time stamp information (provided by the SNTP protocol), for use NodeB timestamp information to estimate the transmission delay. 该时间戳信息包括:原始时间戳Tl (Originate Timestamp Tl)、接收时间戳T2 ( Receive Timestamp T2 )、发送时间戳T3 ( Transmit Timestamp T3 ) 和目标时间戳T4 (Destination Timestamp T4 ) , NodeB用这四个时间戳 The time stamp information comprising: Originate Timestamp Tl (Originate Timestamp Tl), receiving time stamp T2 (Receive Timestamp T2), transmitting timestamp T3 (Transmit Timestamp T3) and the target time stamp T4 (Destination Timestamp T4), NodeB with four timestamp

信息估算出传输延时值,保存在NodeB本地。 Estimated transmission delay value information stored locally in NodeB. 传输时延值T Dealy估算方式如下: Transmission delay estimation value T Dealy follows:

T Dealy = ((T4-T1) - (T3-T2))/2。 T Dealy = ((T4-T1) - (T3-T2)) / 2. RNC定时地广播时间消息,消息中包括RNC侧的基准时间T_Rnc; NodeB根据收到的该RNC广播的基准时间T-Rnc,按下述公式调整本地时间T—NodeB: RNC periodically broadcast time message, the message including a reference time RNC side T_Rnc; NodeB to the RNC based on the reference time received broadcast T-Rnc, adjust the local time according to the following equation T-NodeB:

T一NodeB = T一Rnc + T Dealy。 A NodeB = T T a Rnc + T Dealy.

然而在实际的网络结构中,RNC下挂的NodeB数目会比较多,RNC向众多的NodeB广播时延估算消息,会增加RNC的系统资源开支;另外受链路可靠性以及时延抖动大等因素的影响,还可能造成RNC与NodeB两者间比较低的时间同步精度。 However, in the actual network structure, the number of linked NodeB under the RNC is more, many of the RNC to estimate the delay broadcast message NodeB, RNC increases the expenditure of system resources; additional link reliability by the delay jitter and other factors, and effects, may also cause between both the RNC and NodeB relatively low time synchronization accuracy.

而对于TD—SCDMA移动通信系统,迄今为止,还没有一种解决系统中OMC、 RNC、 NodeB等网元间时间同步的方案。 For the TD-SCDMA mobile communication system, to date, no single system embodiment OMC, RNC, NodeB time synchronization between network elements such as settlement.

此外,在WCDMA和TD-SCDMA系统的小区建立过程中,为了获取RNC和NodeB 间的定时偏差,必须在RNC和NodeB间高优先级的承载上进行节点同步(3GPP 规范中详细定义了RNC和NodeB之间进行节点同步的内容)。 Further, the cell WCDMA and TD-SCDMA system in the process of establishing, in order to obtain the timing offset between the RNC and the NodeB, must node synchronization (3GPP specification defines in detail RNC and NodeB in the high priority bearer between the RNC and NodeB for synchronization between content nodes). 此节点同步过程可参看图1所示。 This synchronization process can be found in the node 1 illustrated in FIG. 由服务RNC(SRNC)向NodeB广播时延估算请求消息,消息中包括发送请求消息的时刻tl,接收到该时延估算请求消息的NodeB向服务RNC发送响应应答消息,响应应答消息中包括SRNC发送请求消息的时刻tl、 NodeB 接收到该请求消息的时刻t2、和NodeB发送响应应答消息的时刻t3,供SRNC 计算定时偏差。 Request message to the NodeB broadcasts delay is estimated by the serving RNC (SRNC), the message including timing tl sending the request message, receiving the delay estimation request message sent by the NodeB to the RNC in response to the service response message comprises a response acknowledgment message sent by the SRNC time tl request message, NodeB receives the request message to the time t2, and NodeB transmits a response acknowledgment message time t3, the timing deviation is calculated for the SRNC.

图1中,SRNS側的公共帧号计数器RFN和NodeB侧的公共帧号计数器BFN 每M微秒(如M-125微秒)加1,计数范围为0-327679微秒,然后循环。 In Figure 1, the common frame number BFN counter common frame number RFN counter NodeB side and the side of the SRNS microseconds every M (e.g., M-125 microseconds) was added 1, a counting range 0-327679 microseconds, then recycled. 制作在图1中以IO微秒为一刻度,其刻度范围为0-40950 ( 327680 x 125=40960000 微秒,40960毫秒)。 FIG fabricated IO 1 microsecond to a scale, which scale range of 0-40950 (327680 x 125 = 40960000 microseconds, 40960 milliseconds). SRNC与NodeB之间按3GPP规范中定义的过程进行节点同步,获取节点同步结果:RFN与BFN之间的差值AT。 A node between the SRNC and the NodeB according to the synchronization procedure defined in 3GPP specifications, node synchronization acquisition result: AT difference between RFN and BFN. SRNC在进巧节点同步时,获取SRNC的公共帧号计数器RFN值tl,发送下行链路节点同步帧(DL Node Synchronization),此帧中包含tl=40941. 25 0; NodeB在收到此帧时i己录当前NodeB的/^共帧号计凄t器BFN 值t2-1492.500, NodeB向SRNC回送响应应答的上行链路节点同步帧(UL Node Synchrozation ),此帧中除了包括tl-40941. 250外,还包括U-1492. 500和发送时的公共帧号计数器BFN值t3=1505. 000; SRNC在收到此帧时,记录当前的RFN值t4。 In the intake synchronous node SRNC Qiao, SRNC acquired common frame number RFN counter value tl, a downlink node synchronization frame transmission (DL Node Synchronization), contained in the frame tl = 40941 25 0;. NodeB Upon receipt of this frame i has recorded the current NodeB / co ^ t is the frame number BFN counter value desolate t2-1492.500, NodeB sends the response back to the SRNC uplink node synchronization response frame (UL node Synchrozation), comprising, in addition to the frame tl-40941. 250 an outer, further comprising a U-1492 500 and the common frame number BFN counter value t3 = 1505 000 at the time of transmission;.. SRNC upon receipt of this frame, the recording current value RFN t4. 从而得出RFN与BFN之间的差值:△ T=RFN-BFN = ( (t 4- t 3) _ ( t 2- t 1) ) /2 ,将这个值存储于RNC中。 To arrive at a difference between RFN and BFN: △ T = RFN-BFN = ((t 4- t 3) _ (t 2- t 1)) / 2, this value is stored in the RNC. 图中所示(t 2- t 1) + (t 4- t 3)给出了往返时延。 As shown in FIG. (T 2- t 1) + (t 4- t 3) gives the round trip delay. 发明内容本发明的目的是设计一种移动通信系统中的网元时间同步方法,利用WCDMA和TD-SCDMA系统已有的、在小区建立过程及其他过程中,RNC和NodeB 间的节点同步过程,即利用该节点同步过程的结果,用非常简单的方法实现网元间更高精度的时间同步,且减小网元在时间同步上的开销,特别是RNC在时间同步上的开销。 Object of the present invention is to design a network element in a communication system time synchronization method of a mobile, using WCDMA and TD-SCDMA system has to establish a cell process and other processes, the node synchronization procedure between the RNC and the NodeB, i.e., using the results of the node synchronization procedure, higher accuracy of time synchronization between network elements in a very simple way, and reduce the overhead at the time of the NE synchronization, particularly RNC time synchronization overhead. 本发明对于以操作维护中心的时间为基准时间时,利用SNTP协议实现让无线网络控制器的基准时间为操作维护中心的基准时间,和利用节点同步结果实现让基站的基准时间为无线网络控制器的基准时间这样的分级管理方案。 The present invention is for a time when operation and maintenance center as a reference time through the SNTP protocol allow a radio network controller so that base station The time base reference time of the reference time of the operation and maintenance center, and using the node synchronization result is a radio network controller the reference time such a hierarchical management scheme. 实现上述发明目的的技术方案是这样的: 一种移动通信系统中的网元时间同步方法,应用于宽带码分多址或时分一同步码分多址移动通信系统中,包括操作维护中心与无线网络控制器间的时间同步,使无线网络控制器的基准时间调整为操作维护中心的基准时间,和无线网络控制器与基站间的时间同步,使基站的基准时间调整为无线网络控制器的基准时间,其特征在于所述的无线网络控制器与基站间的时间同步包括以下处理步骤:Al.无线网络控制器向其所下挂的所有基站发送时间同步消息,时间同 To achieve the above object of the invention is a technical solution: a mobile communication system, a network element a time synchronization method applied to a WCDMA or Time Division Synchronous Code Division Multiple Access mobile communication system, comprising a radio operation and maintenance center and time synchronization between the time synchronization between the network controller, the radio network controller so that the reference time is adjusted to the reference time of operation and maintenance center, and a radio network controller and a base station, the base station so that the reference time is adjusted to a radio network controller reference time, wherein the time between the synchronous radio network controller and a base station comprising the following processing steps:. Al all base stations of the radio network controller linked to the time synchronization message which it sent, with time

步消息中包括无线网络控制器侧的基准时间T-Rnc、对应此基准时间T_Rnc 的公共帧号计数器RFN值RFNT_RNe、以及所存储的定时偏差AT,该定时偏差AT是无线网络控制器的公共帧号计数器RFN值与基站的公共帧号计数器BFN值间的差值,该差值是根据无线网络控制器和基站间的节点同步过程获得的节点同步结果计算得到的;Bl.接收到此时间同步消息的基站,从消息中获取所述的RFNT-RNC、所述的T_Rnc和所述的定时偏差△ T,所述基站获取此时其公共帧号计数器BFN的4iBFNT.N。 Step message includes a radio network controller side, the reference time T-Rnc, this corresponds to the reference time T_Rnc common frame number counter value RFN RFNT_RNe, and the stored timing deviation AT, AT is the deviation of the timing of the radio network controller common frame the difference between the common frame number BFN counter value RFN counter value number with the base station, based on the difference between the node synchronization procedure and the radio network controller base station to obtain synchronization of the calculated results; Bl receiving the time synchronization. the base message to obtain the message from the RFNT-RNC, said T_Rnc and said timing deviation △ T, the base station obtains at which time the common frame number BFN counter 4iBFNT.N. deB,利用T-NodeB = T—Rnc+ ( ( BFNT—N。deB+△ T ) — RFNT—RNC ) xM对其本地时钟T-NodeB进行调整,式中M表示所述无线网络控制器以及所述基站的公共帧号计数器每次加1计数所间隔的时间值。 DEB, using T-NodeB = T-Rnc + ((BFNT-N.deB + △ T) - RFNT-RNC) xM T-NodeB its local clock is adjusted, wherein M represents the radio network controller and the base station the common frame number counter 1 counting each time interval value is added. 所述的操作维护中心与无线网络控制器间的时间同步,使无线网络控制器的基准时间调整为操作维护中心的基准时间,包括以下处理步骤:al.由操作维护中心实现SNTP协议的服务器端,由无线网络控制器实现SNTP协议的客户端,无线网络控制器向操作维护中心发送传输时延估算请求消息;bl.操作维护中心对无线网络控制器发送响应应答消息,在该响应应答消息中包括供无线网络控制器估算传输时延的时间戳信息,该时间戳信息包括:原始时间戳T1、接收时间戳T2、发送时间戳T3和目标时间戳T4,无线网络控制器利用T Dealy = ((T4-Tl) - (T3-T2))/2估算出传输时延值,并保存在无线网络控制器中;cl.操作维护中心定时地向无线网络控制器广播时间消息,该时间消息中包括操作维护中心侧的基准时间T_0mc;dl.无线网络控制器从收到的时间消息中获取操作维护中心侧的 Time synchronization between said operation and maintenance center and a radio network controller, so the radio network controller to adjust the reference time as a reference time of the operation and maintenance center, comprising the following process steps:. Al SNTP protocol implemented by the operation and maintenance center server implemented by a radio network controller SNTP protocol client, the radio network controller to the operation and maintenance center transmits the transmission delay estimation request message;. bl operation and maintenance center sending a response message in response to a radio network controller, a response message in the response the radio network controller comprises a time stamp for the transmission delay estimation information, the time stamp information comprising: Originate timestamp Tl, receive timestamp T2, T3 and the target transmission time stamp timestamp T4, the radio network controller using T Dealy = ( (T4-Tl) - (T3-T2)) / 2 value estimated transmission time delays, and stored in the radio network controller; Cl operation and maintenance center to the radio network controller periodically broadcast time message, the message in time. It includes an operation maintenance center side of the reference time T_0mc;. dl radio network controller acquires the operation time of the message received from the maintenance center side 准时间T_0mc,并根据所估算的传输时延值T Dealy,按T—Rnc=T-0mc+ T Dealy调整无线网络控制器本地的基准时间T-Rnc。 Reference time T_0mc, according to the estimated value of the transmission time delays T Dealy, by T-Rnc = T-0mc + T Dealy radio network controller to adjust the local reference time T-Rnc. 本发明对于以基站的时间为基准时间时,利用节点同步结果实现让无线网络控制器的基准时间为基站的基准时间,和利用SNTP协议实现让操作维护中心的基准时间为无线网络控制器的基准时间这样的分级管理方案。 For the present invention, when the base station time as a reference time, a result achieved using the node synchronization of the radio network controller so that the reference time of the base station reference time, and use the time reference SNTP protocol allows operation and maintenance center for the radio network controller reference this time classification management program. 实现上述发明目的的技术方案是这样的: 一种移动通信系统中的网元时间同步方法,应用于宽带码分多址或时分一同步码分多址移动通信系统中,包括无线网络控制器与基站间的时间同步,使无线网络控制器的基准时间调整为基站的基准时间,和操作维护中心与无线网络控制器间的时间同步,使操作维护中心的基准时间调整为无线网络控制器的基准时间,其特征在于所述的无线网络控制器与基站间的时间同步包括以下处理步骤:A2.无线网络控制器向其所下挂的某一基站请求所述某一基站的基准时间消息;B2.该基站向无线网络控制器返回响应应答消息,该响应应答消息中包含基站的基准时间T-NodeB和对应此基准时间T— NodeB的公共帧号计数器BFN值BFNT -NodeB赁C2.无线网络控制器从该响应应答消息中获取所述的T-NodeB和所述的BFNT_N。 To achieve the above object of the invention is a technical solution: a mobile communication system, a network element a time synchronization method applied to a WCDMA or Time Division Synchronous Code Division Multiple Access mobile communication system, comprising radio network controller and time synchronization between the time synchronization between base stations of the wireless network controller to adjust the base station reference time of the reference time, and operation and maintenance center and a radio network controller, operation and maintenance center that the reference time is adjusted to a radio network controller reference time, wherein the time between the synchronous radio network controller and a base station comprising the following processing steps:. A2 radio network controller linked to the base station requests it a reference time of a message to the base station; B2 the base station returns a response to the radio network controller response message, the response message includes response time reference of the base station corresponding to this T-NodeB and T- common reference time frame number BFN counter value of the NodeB BFNT -NodeB rent C2. radio network control message from the transponder in response to said acquired BFNT_N and the T-NodeB. deB,并从所述无线网络控制器自身获取此时其公共帧号计数器RFN的值RFNT意以及所存储的定时偏差AT,该定时偏差AT是无线网络控制器的公共帧号计数器RFN值与该基站的公共帧号计数器BFN值间的差值,该差值是根据无线网络控制器和所述基站间的节点同步过程获得的节点同步结果计算得到的;D2.无线网络控制器利用T一Rnc = T—NodeB + ( (RFN潔T ) -BFNT-NodeB) xM,对其本地时钟T —Rnc进行调整,式中M表示所述无线网络控制器以及所述基站的公共帧号计数器每次加1计数所间隔的时间值。 DEB, and obtains from the radio network controller itself at which time the common frame number RFN counter value RFNT meaning and the stored timing difference AT, the AT is common timing offset frame number RFN counter value of the radio network controller the difference between the common frame number BFN counter value of the base station, based on the difference between the node synchronization procedure of the radio network controller and base station to obtain synchronization of the calculated results;. D2 T using a radio network controller Rnc = T-NodeB + ((RFN cleaning T) -BFNT-NodeB) xM, T -Rnc its local clock is adjusted, wherein M represents the radio network controller and the base station common frame number counter increments by 1 time interval counted value. 所述的操作维护中心与无线网络控制器间的时间同步,使操作维护中心的基准时间调整为无线网络控制器的基准时间,包括以下处理步骤:a2.由无线网络控制器实现SNTP协议的服务器端,由操作维护中心实现SNTP协议的客户端,操作维护中心向一无线网络控制器发送传输时延估算请求消息;b2.该无线网络控制器向操作维护中心发送响应应答消息,在该响应应答消息中包括供操作维护中心估算传输时延的时间戳信息,该时间戳信息包括:原始时间戳T1、接收时间戳T2、发送时间戳T3和目标时间戳T4,操作维护中心利用T Dealy = ((T4-Tl) - (T3-T2))/2估算出传输时延值,并保存在操作维护中心中;c2.无线网络控制器定时地向操作维护中心发送时间消息,该时间消息中包括无线网络控制器侧的基准时间T —Rnc;d2.操作维护中心从收到的时间消息中获取无线网络控制器侧 Time synchronization between said operation and maintenance center and a radio network controller, that the operation and maintenance center of the reference time to adjust to the reference time of the radio network controller, comprising the following process steps:. A2 SNTP protocol implemented by the radio network controller server end, operation and maintenance center is implemented by SNTP protocol client, an operation and maintenance center to the radio network controller transmits the transmission delay estimation request message;. b2 in response to the radio network controller sends a response message to the operation and maintenance center, a response in the response message includes the timestamp information for the operation and maintenance center estimated transmission delay, the time stamp information comprising: Originate timestamp Tl, receive timestamp T2, T3 and the target transmission time stamp timestamp T4, operation and maintenance center using T Dealy = ( (T4-Tl) - (T3-T2)) / 2 value estimated transmission time delays, and stored in the operation and maintenance center; C2 radio network controller periodically transmits the time message to the operation and maintenance center, which includes a time message. the radio network controller side a reference time of T -Rnc;. d2 operation and maintenance center for the radio network controller side from the received time message 基准时间T—Rnc,并根据所估算的传输时延值T Dealy,按T—0mc =T_Rnc + T Dealy调整操作维护中心本地的基准时间T_0mc。 Reference time T-Rnc, according to the estimated value of the transmission time delays T Dealy, by T-0mc = T_Rnc + T Dealy adjustment operation and maintenance center of the local reference time T_0mc. 本发明提出了WCDMA、 TD - SCDMA移动通信系统中0MC、 RNC和RNC所管理的NodeB这些网元间绝对时间同步方法。 The present invention proposes a WCDMA, TD - SCDMA mobile communication system, the network elements NodeB absolute time synchronization method 0MC, RNC and the RNC manages. 本发明提出RNC和NodeB两个网元间的时间同步方法,不论以操作维护中心的时间为基准时间还是以基站的时间为基准时间,都充分利用了WCDMA和TD-SCDMA系统在小区建立及其他过程中,RNC和NodeB间进行节点同步过程所获得的结果,即利用了UMTS、 UTRAN中RNC和NodeB间节点同步的结果,再采用非常简单的方法实现了更高精度的时间同步。 The present invention proposes a method of time synchronization between the RNC and the NodeB two network elements, regardless of time of operation and maintenance center to the base station time reference or time as a reference time, and have full use of WCDMA and TD-SCDMA system is built in the other cells during inter-RNC and NodeB node synchronization procedure results obtained, namely the use of UMTS, UTRAN NodeB and the RNC node synchronization of intermediate results, and then a very simple way to achieve a more accurate time synchronization. 本发明方法利用RNC和NodeB间的节点同步结果,时间同步精度高, 且不必严格限制ATM承载IP (IpoA: IP Over ATM )通道的传输时延。 The method of the present invention using the node synchronization result between the RNC and the NodeB, high accuracy time synchronization, and is not necessarily restricted ATM bearer IP (IpoA: IP Over ATM) channel transmission delay. 在WCDMA和TD-SCDMA系统中,RNC和NodeB间节点同步过程在Iub接口高优先级的传输承载上进行,在这样的传输承载上进行节点同步过程,节点同步帧传输时延小并且时延抖动也小,利用节点同步结果作为网元间时间同步基础,精度高。 , Between the RNC and NodeB Node Synchronization procedure in WCDMA and TD-SCDMA system in the high priority Iub interface transport bearer, a node synchronization procedure on such transport bearer, node synchronization frame transmission delay and delay jitter small It is also small, as a result of using the node synchronization time synchronization between network elements based high precision. 由于采用分级管理,OMC不需要与NodeB进行直接的时间同步过程。 Thanks classification management, OMC does not require direct synchronization with the time NodeB. RNC作为无线网络系统(RNS)的管理者,实现对RNS网元间的时间同步。 As the RNC the wireless network system (RNS) manager, time synchronization between NEs RNS. 从而简化了OMC与NodeB间的时间同步过程。 Thereby simplifying the process of time synchronization between the OMC and the NodeB. 在时间同步过程中,RNC与NodeB之间的消息交互采用系统内部消息, In the time synchronization messages between the RNC and the NodeB internal interactive system employing message,

可以简化系统处理过程,便于实现。 Processing system can be simplified, easy to implement. 与NodeB未进行节点同步的情况下,本发明的RNC和NodeB的时间同步方法是无法使用的。 Case where a node is not synchronized NodeB, RNC and NodeB time synchronization method of the present invention can not be used. 综上所述,本发明的方法实现简单、时间同步精度高(尤其是RNC与NodeB 间的时间同步精度在毫秒级,误差可远远小于l秒)、网元(尤其是RNC)在时间同步方面的开销小。 In summary, the method of the present invention is simple, high time synchronization accuracy (time synchronization accuracy, especially between the RNC and the NodeB in milliseconds, an error may be much less than l second), NE (especially RNC) synchronized time little overhead areas. 附图说明图1是RNC与NodeB间的节点同步过程示意图; 图2是RNC与NodeB时间同步过程第一实施例的流程框图; 图3是RNC和NodeB时间同步过程二实施例的流程框图; 图4是RNC和NodeB同步时间计算的释义示意图。 BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a node synchronization procedure between the RNC and the NodeB schematic diagram; FIG. 2 is a block flow diagram of the RNC and the NodeB time synchronization process of the first embodiment; FIG. 3 is a block flow diagram of the RNC and the NodeB time synchronization process of the second embodiment; FIG. 4 is a schematic interpretation RNC and NodeB synchronization time calculations. 具体实施方式本发明的网元间的时间同步,包括0MC与RNC之间的时间同步和RNC与NodeB之间的时间同步。 Time synchronization between NEs particular embodiment of the invention, including the time between the RNC and the 0MC synchronization and time synchronization between the RNC and the NodeB. 本发明对0MC与RNC的时间同步,采用SNTP协议进行同步。 The present inventors 0MC time synchronization with the RNC using SNTP protocol for synchronization. 在以0MC的时间为基准时间时,0MC实现SNTP的服务器端,RNC实现SNTP的客户端。 When 0MC of time to the reference time, 0MC achieve the SNTP server, RNC for SNTP clients. 时间同步中对传输时延的估算由请求和响应两条消息完成:RNC向0MC 发送延时估算请求消息,0MC对RNC发送响应应答消息,在该响应应答消息中包括时间戳信息,供RNC利用时间戳信息估算传输延时。 Time synchronization of the transmission delay estimation is performed by two request and response message: RNC transmits a request message to the estimated delay 0MC, 0MC transmits a response message to the RNC response, the response in the response message includes a time stamp information for the RNC using timestamp information to estimate the transmission delay. 该时间戳信息包括:原始时间戳Tl ( Originate Timestamp Tl )、接收时间戳T2 ( Receive Timestamp T2 )、发送时间戳T3 (Transmit Timestamp T3 )和目标时间戳T4 (Destination Timestamp T4 ) , RNC用这四个时间戳信息估算出传输时延值,保存在RNC本地。 The time stamp information comprising: Originate Timestamp Tl (Originate Timestamp Tl), receiving time stamp T2 (Receive Timestamp T2), transmitting timestamp T3 (Transmit Timestamp T3) and the target time stamp T4 (Destination Timestamp T4), RNC with four timestamp information estimated transmission delay value, stored locally in the RNC. 传输延时值T Dealy估算方式如下:<formula>formula see original document page 13</formula>OMC定时地广播时间消息,消息中包括OMC侧的基准时间T_0mc;RNC根据收到的该0MC的广播时间T-Omc和计算的传输延时值T Dea 1 y, 调整本地的时间T—Rnc。 Transmission delay value T Dealy estimated as follows: <formula> formula see original document page 13 </ formula> OMC periodically broadcast time message, the message including a reference time OMC side T_0mc; RNC according to the broadcasting time of the received 0MC T-Omc value and the calculated transmission delay T Dea 1 y, adjust the local time T-Rnc. RNC作为NodeB的上级时间管理者,该RNC的本地时间就是RNC侧的基准时间。 As superior RNC NodeB time manager, the local time of the RNC is the RNC side of the reference time. RNC按下述公式调整本地时间T-Rnc:T—Rnc-T_0mc+ T Dealy。 RNC adjusts the local time T-Rnc by the following equation: T-Rnc-T_0mc + T Dealy. 上述对OMC-R与RNC的时间同步,与背景技术中所介绍的RNC与NodeB 之间的时间同步方式一致。 OMC-R above for time synchronization with the RNC, a manner consistent with the time synchronization between the RNC and the NodeB in the background art described. 在以NodeB的时间为基准时间时(先实现RNC与NodeB的时间同步), 利用SNTP协议实现RNC与OMC的时间同步。 When the NodeB time at the reference time (to synchronize the time of the RNC and the NodeB), and the RNC using SNTP protocol OMC time synchronization. 时间同步中对传输时延的估算由请求和响应两条消息完成:由无线网络控制器实现SNTP协议的服务器端,由操作维护中心实现SNTP协议的客户端, 操作维护中心向一无线网络控制器发送传输时延估算请求消息。 Time synchronization of the transmission delay estimation is performed by two request and response message: SNTP protocol implemented by the radio network controller server, the SNTP protocol implemented by the operation and maintenance center client, operation and maintenance center to a radio network controller transmitting transmission delay estimation request message. 该无线网络控制器向操作维护中心发送响应应答消息,在该响应应答消息中包括供操作维护中心估算传输时延的时间戳信息,该时间戳信息包括: 原始时间戳T1、接收时间戳T2、发送时间戳T3和目标时间戳T4,操作维护中心利用T Dealy - ((T4-T1) - (T3-T2))/2估算出传输时延值,并保存在才乘作维护中心中。 The radio network controller sends a response message in response to the operation and maintenance center, in response to the response message includes time stamp information for the operation and maintenance center estimated transmission delay, the time stamp information comprising: Originate Timestamp Tl, receive timestamp T2, target transmission time stamp and time stamp T3 T4, operation and maintenance center using T Dealy - ((T4-T1) - (T3-T2)) / 2 value estimated transmission time delays, and stored in the maintenance work only by center. 无线网络控制器定时地向操作维护中心发送时间消息,该时间消息中包括无线网络控制器側的基准时间T_Rnc。 The radio network controller periodically transmits the time message to the operation and maintenance center, the time message includes a reference time T_Rnc the radio network controller side. 搡作维护中心从收到的时间消息中获取无线网络控制器側的基准时间T —Rnc,并根据所估算的传输时延值T Dealy,按T—Omc =T —Rnc + T Dealy 调整操作维护中心本地的基准时间T_0mc。 Shoving maintenance center for the radio network controller acquires the reference time T -Rnc side from the received time message, and in accordance with the estimated value of the transmission time delays T Dealy, by T-Omc = T -Rnc + T Dealy adjustment operation Maintenance Center local reference time T_0mc. RNC与NodeB的时间同步。 RNC and NodeB time synchronization. 如果以OMC的时间为基准时间,此NodeB则按照下面的方法与RNC进行时间同步。 If the OMC time with the reference time, the NodeB according to this method the following time synchronization with the RNC.

进行时间同步前,RNC与NodeB之间的操作维护通道已经建立。 Time synchronization before the operation between the RNC and NodeB maintenance channel has been established. NodeB 与RNC之间进行了节点同步,RNC获取了RNC与NodeB间的节点同步结果tl、 t2、 t3、 t4,计算并存储了RNC侧公共帧号计数器值RFN与NodeB側公共帧号计数器值BFN间的差值AT (定时偏差)。 Carried out between the nodes NodeB and RNC synchronization, the RNC node synchronization acquisition result tl between the RNC and the NodeB, t2, t3, t4, and stores the calculated common RNC side frame number RFN counter value and the NodeB side common frame number counter value BFN AT the difference between the (timing deviation). RNC周期性地或者接受操作维护中心的指令进行时间同步。 RNC periodically or operation and maintenance center to accept an instruction for time synchronization. 以RNC周期性地进行时间同步为例说明。 RNC periodically performed in an example of time synchronization. RNC定时向所下挂的所有NodeB发送时间同步消息,时间同步消息中包括RNC侧的基准时间T-Rnc (RNC以RNC侧的时间为基准时间),以及对应此基准时间T—Rnc的公共帧号计数器RFN值RFNT_RN(;以及所存储的RNC与NodeB间公共帧号计数器RFN和BFN的定时偏差AT;接收到此时间同步消息的NodeB,从消息中获取RNC的RFNt直,以及此RFNTi对应的RNC的基准时间T-Rnc和定时偏差AT, NodeB此时获取其公共帧号计数器BFN的值BFNu。deB,根据以上所获得的值,NodeB对其本地时钟T —NodeB进行调整,调整方式如下:T一NodeB = T —Rnc+ ( ( BFNT—N。deB+AT ) — RFNt.匿)xMjas。 RNC的公共帧号计数器RFN和NodeB的公共帧号计数器BFN每隔M微秒进行加1计数, 如M=125 jn s。反之,如果是以NodeB的时间为基准(如由具有GPS的NodeB,以GPS 信息作为时间基准),也是可以通过以上的方法,同步NodeB与RNC的时间(见图3及其说明)。参见图2 RNC periodically sends to all the NodeB under the hang time synchronization message, the time synchronization message includes a reference time RNC side of the T-Rnc (RNC time RNC side as a reference time), and a common frame corresponding to this reference time T-Rnc of number counter value RFN RFNT_RN (; and stored between the RNC and the NodeB common frame number RFN and BFN counter timing offset the AT; receiving the time synchronization message NodeB, RNC acquires RFNt straight from the message, and this corresponds to RFNTi the RNC and the reference time T-Rnc timing deviation AT, NodeB BFNu.deB its public value acquired this time frame number BFN counter in accordance with the value obtained above, the NodeB T -NodeB their local clock adjustments are made as follows: T a NodeB = T -Rnc + ((BFNT-N.deB + AT) -. RFNt hide). xMjas RNC common frame number RFN counter and the NodeB for public BFN frame number counter 1 counting every plus M microseconds, such as M = 125 jn s. Conversely, if the NodeB is a time reference (e.g., a NodeB having the GPS, the GPS time information as a reference), but also by the above method, NodeB and RNC synchronization time (see FIG. 3 and description thereof). Referring to Figure 2 图中描述了Iub接口上RNC与NodeB间的时间同步流程, 该流程是NodeB无GPS、或者有GPS但GPS信息不作为网元时间同步的基准时间时的流程。步骤21,开始进行时间同步时,RNC获取在节点同步时获得的节点同步信息:tl、 t2、 t3、 t4;步骤22,获取根据四个节点同步信息tl、 t2、 t3、 t4计算的RFN与BFN间的定时偏差AT;步骤23, RNC广播其基准时间T-Rnc,和对应此基准时间T—Rnc的公共帧号计数器RFN值RFNt.,、以及定时偏差AT;步骤24 , NodeB接收到此时间同步消息,从消息中获取RNC的訓t意, 以及此RFNT.,对应的RNC的基准时间T_Rnc和定时偏差△ T, NodeB此时获取其公共帧号计数器BFN的值BFNT.N。deB,根据以上所获得的值按公式:T—NodeB = T—Rnc+ ( ( BFNT—N。deB+AT ) — RFNT—RNC ) xMps,对其本地时钟T-NodeB进行调整。RNC的公共帧号计数器RFN和NodeB的公共帧号计数器BFN每隔M微秒进行加1计数,如M- FIG described time synchronization process between Iub interface on the RNC and the NodeB, the flow is NodeB no GPS, or a GPS, but the GPS information is not a process when a reference time NE time synchronization step 21, starts synchronization time , the RNC acquires the node synchronization node synchronization information obtained: tl, t2, t3, t4; the step 22, the synchronization information is acquired according to four nodes tl, t2, t3, t4 timing deviation aT between RFN and BFN calculated; step 23, RNC broadcasts its reference time T-Rnc, and this corresponds to the reference time T-Rnc common frame number RFN counter value and a timing offset RFNt ,, AT;. step 24, NodeB receiving the time synchronization message to obtain from the message t RNC precepts meaning, and this RFNT., the RNC corresponding to the reference time and T_Rnc timing deviation △ T, NodeB BFNT.N.deB its public value acquired this time frame number BFN counter, according to the value obtained by the above formula : T-NodeB = T-Rnc + ((BFNT-N.deB + AT) - RFNT-RNC) xMps, BFN their local clock T-NodeB to adjust .RNC common frame number RFN counter and the NodeB common frame number counter for every 1 count plus M microseconds, such as M- 125)as。 125) as. 参见图3,图中描述了Iub接口上RNC与NodeB间的时间同步流程, 是NodeB有GPS并使用GPS信息作为网元时间同步基准时间的流程。 Referring to Figure 3, depicted in the time synchronization process on the Iub interface between the RNC and the NodeB, NodeB is using a GPS and GPS time information of the NE synchronization process as a reference time. 步骤31,开始进行时间同步时,RNC获取在节点同步时获得的节点同步信息:tl、 t2、 t3、 t4;步骤32, RNC获取根据四个节点同步信息tl、 t2、 t3、 t4计算的RFN 与BFN间的定时偏差AT;步骤33, RNC向某个NodeB请求该NodeB的基准时间T —NodeB,和对应此基准时间T- NodeB的公共帧号计数器BFN值BFNT„N。deB;步骤34, RNC接收到NodeB返回的响应消息,从响应消息中获取NodeB 的基准时间T —NodeB和对应此基准时间T_ NodeB的公共帧号计数器BFN值BFNt勉b,此时获取RNC公共帧号计数器RFN的值RFNT-RNC,以及定时偏差AT, 根据以上所获得的值按公式:T—Rnc = T—NodeB + ( (RFNt—匿-AT ) -BFNT.N。deB ) xm ja s,对其本地时钟T—Rnc进行调整。RNC的公共帧号计数器RFN和NodeB的公共帧号计数器BFN每隔M微秒进行加1计数,如M-125jas。参见图4,对RNC与NodeB同步时间计算公式进行解释。首先假设RNC与NodeB之间的时间偏差为A Step 31, the start time synchronization, the RNC acquires synchronization information obtained when the node in the node: tl, t2, t3, t4; step 32, RNC synchronization information is acquired according to four nodes tl, t2, t3, t4 calculated RFN timing deviation between the AT and BFN; step 33, RNC a request to the NodeB, NodeB reference time T -NodeB, and this corresponds to the reference time T-NodeB common frame number BFN counter value BFNT "N.deB; step 34, RNC receives a response message returned by the NodeB, the NodeB acquired from the response message and a corresponding reference time T -NodeB this time T_ NodeB common reference frame number BFN counter value BFNt Mian B, RNC acquired at this value of the common frame number RFN counter RFNT-RNC, and the timing deviation AT, according to the value obtained by the above equation: T-Rnc = T-NodeB + ((RFNt- hide -AT) -BFNT.N.deB) xm ja s, its local clock T -Rnc adjustment .RNC common frame number RFN counter and the NodeB BFN every common frame number counter 1 counts plus M microseconds, such as M-125jas. 4, the RNC and the NodeB calculates the synchronization time equation Referring to FIG explained. first, assume the time offset between the RNC and the NodeB is a T,下行传输时延和上行 T, upstream and downstream transmission delay

传输时延都为d/2时,则: t 2 = (t 1 -ΔT) + d/2 t 4 = (t 3 + ΔT) + d/2 进行简单的公式变换则有: (t 4-1 3)= ΔT + d/2 (t 2—t 1) = -ΔT + d/2((t 4-1 3)-(t 2-tl))/2 = ((ΔT + d/2)-(-ΔT + d/2) )/2 =(2 x △ T) /2 = △ TWCDMA系统和TD-SCDMA系统中,网元时间同步包括OMC与RNC间的时间同步和RNC与NodeB间的时间同步。 When all of the transmission delay d / 2, then: t 2 = (t 1 -ΔT) + d / 2 t 4 = (t 3 + ΔT) + d / 2 simple conversion formula, there are: (t 4- 1 3) = ΔT + d / 2 (t 2-t 1) = -ΔT + d / 2 ((t 4-1 3) - (t 2-tl)) / 2 = ((ΔT + d / 2) - (- ΔT + d / 2)) / 2 = (2 x △ T) / 2 = △ TWCDMA system and TD-SCDMA systems, the NE time synchronization includes a time between the OMC and the RNC synchronization between the RNC and the NodeB time synchronization. 例如在NodeB不釆用GPS的情况下, 系统以OMC的时间为基准,通过OMC与RNC间的时间同步,让RNC以OMC的时间为基准,再通过RNC与NodeB间的时间同步,让NodeB以RNC的时间为基准。 For example, does not preclude the NodeB with the case of GPS, the system OMC is time-based, synchronous by the time between the OMC and the RNC, so that the RNC OMC time basis, re-synchronization by the time between the RNC and NodeB, let NodeB to RNC time basis. 在NodeB采用GPS的情况下,NodeB以GPS信息为基准,RNC与NodeB 间的时间同步则不需要OMC与RNC间的时间同步,通过RNC与NodeB间的时间同步,让RNC以NodeB的时间为基准,然后就可让OMC以RNC的时间为基准。 In the case of the use of GPS NodeB, NodeB reference to GPS information, time synchronization between the RNC and NodeB time synchronization is not required between the OMC and the RNC, by synchronizing time between the RNC and NodeB, RNC in order to allow time for the benchmark NodeB and then you can let the OMC to the RNC a time basis. 在实现RNC与NodeB间的时间同步过程中都充分使用了RNC与NodeB间在节点同步过程中获得的节点同步信息及其定时偏差结果。 In the course of time synchronization between the RNC and the NodeB implementation are fully used and the node synchronization timing shift information between the RNC and the NodeB result obtained in the node synchronization process. 本发明的方法,不局限于网络中OMC、 RNC、 NodeB这样的网元间的绝对时间同步,网络系统中其他网元间的绝对时间同步,也可以参照本发明方法的精神进行。 The method of the present invention is not limited to network OMC, RNC, NodeB absolute time synchronization between NEs such, network systems absolute time synchronization between other network elements, the method can also refer to the spirit of the present invention.

Claims (9)

1.一种移动通信系统中的网元时间同步方法,应用于宽带码分多址或时分-同步码分多址移动通信系统中,包括操作维护中心与无线网络控制器间的时间同步,使无线网络控制器的基准时间调整为操作维护中心的基准时间,和无线网络控制器与基站间的时间同步,使基站的基准时间调整为无线网络控制器的基准时间,其特征在于所述的无线网络控制器与基站间的时间同步包括以下处理步骤: A1.无线网络控制器向其所下挂的所有基站发送时间同步消息,时间同步消息中包括无线网络控制器侧的基准时间T_Rnc、对应此基准时间T_Rnc的公共帧号计数器RFN值RFNT_RNC、以及所存储的定时偏差ΔT,该定时偏差ΔT是无线网络控制器的公共帧号计数器RFN值与基站的公共帧号计数器BFN值间的差值,该差值是根据无线网络控制器和基站间的节点同步过程获得的节点同步结果 A mobile communication system, a network element a time synchronization method applied to the WCDMA or Time Division - Synchronous Code Division Multiple Access mobile communication system, comprising a time synchronization between the operation and maintenance center and a radio network controller, so time synchronization between the reference time of the wireless network controller to adjust the reference time of operation and maintenance center, and a radio network controller and a base station, the base station is adjusted so that the reference time as a reference time of a radio network controller, wherein the radio the time between the network synchronization with a base station controller comprising the following processing steps:. A1 all base stations in the radio network controller linked to the next message which it transmits the time synchronization, time synchronization message includes a reference time in a radio network controller side T_Rnc, this corresponds to T_Rnc common time reference frame number RFN counter value RFNT_RNC, and a timing offset ΔT stored in the timing deviation ΔT is the difference between the common frame number BFN counter value of the common frame number RFN counter value with a base station of a radio network controller, the difference is based on the node synchronization procedure between the radio network controller and a base to obtain the result of synchronization 计算得到的; B1.接收到此时间同步消息的基站,从消息中获取所述的RFNT_RNC、所述的T_Rnc和所述的定时偏差ΔT,所述基站获取此时其公共帧号计数器BFN的值BFNT_NodeB,利用T_NodeB=T_Rnc+((BFNT_NodeB+ΔT)-RFNT_RNC)×M对其本地时钟T_NodeB进行调整,式中M表示所述无线网络控制器以及所述基站的公共帧号计数器每次加1计数所间隔的时间值。 Calculated;. B1 receiving the time synchronization message to the base station, the RFNT_RNC acquired from the message, and the said T_Rnc timing offset [Delta] T, the base station obtains the value of its public BFN frame number counter at that time BFNT_NodeB, using T_NodeB = T_Rnc + ((BFNT_NodeB + ΔT) -RFNT_RNC) × M to adjust its local clock T_NodeB, wherein M represents the radio network controller and the base station common frame number counter 1 counting increments by interval value.
2.根据权利要求1所述的方法,其特征在于所述的操作维护中心与无线网络控制器间的时间同步,使无线网络控制器的基准时间调整为操作维护中心的基准时间,包括以下处理步骤:al.由操作维护中心实现SNTP协议的服务器端,由无线网络控制器实现SNTP协议的客户端,无线网络控制器向操作维护中心发送传输时延估算请求消息;bl.操作维护中心对无线网络控制器发送响应应答消息,在该响应应答消息中包括供无线网络控制器估算传输时延的时间戳信息,该时间戳信息包括:原始时间戳T1、接收时间戳T2、发送时间戳T3和目标时间戳T4,无线网络控制器利用T Dealy = ((T4-T1) - (T3-T2))/2估算出传输时延值,并保存在无线网络控制器中;cl.操作维护中心定时地向无线网络控制器广播时间消息,该时间消息中包括操作维护中心侧的基准时间T-0mc;d 1.无线网络控制器从收 2. The method according to claim 1, characterized in that the time synchronization between the operation and maintenance center and a radio network controller, so the radio network controller to adjust the reference time as a reference time of the operation and maintenance center, comprising processing step: al is realized by the operation and maintenance center server SNTP protocol, implemented by the radio network controller protocol SNTP client, the radio network controller transmits the transmission delay estimation request message to the operation and maintenance center; BL radio operation and maintenance center. the network controller sends a response message response, a response in the response message includes a radio network controller for transmission delay estimation information is a time stamp, the time stamp information comprising: Originate timestamp Tl, receive timestamp T2, T3, and transmit timestamp target timestamp T4, the radio network controller using T Dealy = ((T4-T1) - (T3-T2)) / 2 value estimated transmission time delays, and stored in the radio network controller; Cl timing of the operation and maintenance center. the radio network controller to broadcast time message, the message includes a reference time period operation and maintenance center side of the T-0mc; d 1. received from the radio network controller 到的时间消息中获取操作维护中心侧的基准时间T-Omc,并根据所估算的传输时延值T Dealy,按T—Rnc=T—Omc+ T Dealy 调整无线网络控制器本地的基准时间T-Rnc。 Message to acquire a reference time period operation and maintenance center side of the T-Omc, and according to the estimated value of the transmission time delays T Dealy, by T-Rnc = T-Omc + T Dealy radio network controller to adjust the local time reference T- Rnc.
3. 根据权利要求l所述的方法,其特征在于所述步骤Al中,所述的无线网络控制器定时地向其所下挂的所有基站发送时间同步消息。 3. The method of claim l, wherein all of said base stations in step Al, the radio network controller linked to the timing of the time synchronization message which it transmits.
4. 根据权利要求1所述的方法,其特征在于所述步骤Al中,所述的无线网络控制器根据操作维护中心的指令向其所下挂的所有基站发送时间同步消息。 4. The method according to claim 1, wherein said step Al, all of the base stations of the radio network controller linked to the operation and maintenance center it according to the instruction of the time synchronization message transmission.
5. —种移动通信系统中的网元时间同步方法,应用于宽带码分多址或时分—同步码分多址移动通信系统中,包括无线网络控制器与基站间的时间同步, 使无线网络控制器的基准时间调整为基站的基准时间,和搡作维护中心与无线网络控制器间的时间同步,使操作维护中心的基准时间调整为无线网络控制器的基准时间,其特征在于所述的无线网络控制器与基站间的时间同步包括以下处理步骤:A2.无线网络控制器向其所下挂的某一基站请求所述某一基站的基准时间消息;B2.该基站向无线网络控制器返回响应应答消息,该响应应答消息中包含基站的基准时间T—NodeB和对应此基准时间T_ NodeB的公共帧号计数器BFN值BFNTC2.无线网络控制器从该响应应答消息中获取所述的T-NodeB和所述的BFNT_N。 5. - kind of mobile communication systems network element a time synchronization method applied to the WCDMA or Time Division - Synchronous Code Division Multiple Access mobile communication system, comprising a time synchronization between the radio network controller and a base station of the wireless network adjusting the reference time of the controller of the base station reference time, and maintenance center for shoving and time synchronization between a radio network controller, the reference time of the operation and maintenance center is adjusted to the reference time of the wireless network controller, wherein said the time between the base station and the synchronous radio network controller comprises the following processing steps: A2 radio network controller linked to the base station requests it a reference time of a message to the base station; the base station B2 to the radio network controller. response message returns a response, the response time of the response message includes the reference base station T-NodeB and the common frame number BFN counter value corresponding to this reference BFNTC2 time T_ NodeB a radio network controller in response to the response message acquired from the T- NodeB and the BFNT_N. deB,并从所述无线网络控制器自身获取此时其公共帧号计数器RFN的值RFNT,以及所存储的定时偏差AT,该定时偏差AT是无线网络控制器的公共帧号计数器RFN值与该基站的公共帧号计数器BFN值间的差值,该差值是根据无线网络控制器和所述基站间的节点同步过程获得的节点同步结杲计算得到的;D2.无线网络控制器利用T—Rnc = T—NodeB+ ( (RFNT—RNC-AT) -BFNT_N。deB) xM,对其本地时钟T-Rnc进行调整,式中M表示所述无线网络控制器以及所述基站的公共帧号计数器每次加1计数所间隔的时间值。 DEB, and obtains from the radio network controller itself at which time the common frame number RFN counter value RFNT, and the stored timing deviation AT, the AT is common timing offset frame number RFN counter value of the radio network controller the difference between the common frame number BFN counter value of the base station, the difference is calculated Gao synchronous junction node according to the synchronization procedure between the base station and a radio network controller obtained;. D2 radio network controller using T- Rnc = T-NodeB + ((RFNT-RNC-AT) -BFNT_N.deB) xM, T-Rnc its local clock is adjusted, wherein M denotes a common frame number counter of the radio network controller and each of said base stations time plus 1 times the count value of the gap.
6. 根据权利要求5所述的方法,其特征在于所述的操作维护中心与无线网络控制器间的时间同步,使操作维护中心的基准时间调整为无线网络控制器的基准时间,包括以下处理步骤:a2.由无线网络控制器实现SNTP协议的服务器端,由搡作维护中心实现SNTP协议的客户端,操作维护中心向一无线网络控制器发送传输时延估算请求消息;b2.该无线网络控制器向操作维护中心发送响应应答消息,在该响应应答消息中包括供操作维护中心估算传输时延的时间戳信息,该时间戳信息包括:原始时间戳T1、接收时间戳T2、发送时间戳T3和目标时间戳T4,操作维护中心利用T Dealy = ((T4-T1) - (T3-T2))/2估算出传输时延值,并保存在操作维护中心中;c2.无线网络控制器定时地向操作维护中心发送时间消息,该时间消息中包括无线网络控制器侧的基准时间T_Rnc;d2.操作维护中心从收 6. The method according to claim 5, characterized in that the time synchronization between the operation and maintenance center and a radio network controller, the reference time of the operation and maintenance center is adjusted to the reference time of the wireless network controller, comprising processing step: a2 implemented by a radio network controller SNTP server protocol, implemented by the service center for shoving SNTP protocol client, operation and maintenance center transmits the transmission delay estimation request message to a radio network controller; B2 of the wireless network. controller sends a response message in response to the operation and maintenance center, a response in the response message includes time stamp information for the operation and maintenance center estimated transmission delay, the time stamp information comprising: Originate timestamp Tl, receive timestamp T2, the transmission time stamp time stamp T3 and the target T4, operation and maintenance center using T Dealy = ((T4-T1) - (T3-T2)) / 2 value estimated transmission time delays, and stored in the operation and maintenance center; C2 radio network controller. periodically sending time message to the operation and maintenance center, the time message includes a reference time of a radio network controller side T_Rnc;. d2 received from the operation and maintenance center 的时间消息中获取无线网络控制器侧的基准时间T—Rnc,并根据所估算的传输时延值T Dealy,按T_0mc =T—Rnc + T Dealy 调整操作维护中心本地的基准时间T_0mc。 Time message acquires the radio network controller side reference time T-Rnc, according to the estimated value of the transmission time delays T Dealy, press T_0mc = T-Rnc + T Dealy adjustment operation and maintenance center of the local reference time T_0mc.
7. 根据权利要求5所述的方法,其特征在于:所述基站的基准时间T-NodeB是使用基站的全球定位系统所提供的全球定位信息作为基准时间。 7. The method as claimed in claim 5, wherein: the reference time of the base station T-NodeB is a base station using global positioning information provided by GPS time as a reference.
8. 根据权利要求5所述的方法,其特征在于:所述步骤A2中,无线网络控制器定,时地,其所下挂的某一基站请求该基站的基准时间消息。 8. The method as claimed in claim 5, wherein: said step A2, the radio network controller may be, from time to time, the reference time of the message at the base station linked to a base station requests it.
9.根据权利要求5所述的方法,其特征在于:所述步骤A2中,无线网络控制器根据操作维护中心的指令向其所下挂的某一基站请求该基站的基准时间消息。 9. The method as claimed in claim 5, wherein: said step A2, the time reference message for the base station to a radio network controller requests the base station to which it is linked in accordance with the instruction operation and maintenance center.
CN 200410048326 2004-06-17 2004-06-17 Network element time synchronizing method in mobile communication system CN100370864C (en)

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CN101247169A (en) * 2007-02-15 2008-08-20 华为技术有限公司 Method, system and equipment for implementing time synchronization in communication network
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