CN101197610A - Clock synchronization method of CDMA base station network management system - Google Patents
Clock synchronization method of CDMA base station network management system Download PDFInfo
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Abstract
The invention relates to a clock synchronization method of a CDMA base station network management system, which consists of the following steps: a first step is to choose a district-level management center as a clock source, which is used by the network management center to select a base clock source or a user configuration synchronic with a network management system, as a district-level management center acting as a clock source; a second step is to synchronize the GPS time of the district-level management center with that of a CDMA base station, which is used to determine the time of the clock source; a third step is to synchronize above network management center with other district-level management centers beside the above district-lever management, which is use for time synchronization among the network managements. In the invention, by completing the synchronization of the received GPS time of the CDMA base station, a user can switch among different base stations via a user interface, and the synchronization of the whole OMC network management system is achieved, and the deviation of OMC time from normal time and the time inconsistency between OCMs have been resolved, and the precision and the accuracy of the OCM network system clock has been promoted.
Description
Technical field
The present invention relates to wireless communication technology field, relate in particular to a kind of method of cdma base station network management system clock synchronization.
Background technology
With operation maintenance center (OMC) network management system cdma base station is being managed when safeguarding, because each district level administrative center (Operation Maintenance, OMM) base station of being managed is limited, so usually there are a plurality of OMM in network management system, different OMM is not owing to provide the method for clock synchronization, and each OMM time is usually inconsistent.When the information with time correlation is presented at network management center (NMC) such as performance collection data (comprising data acquisition time), the analysis result that these inconsistent temporal informations must make mistake in the time of may causing the performance data analysis of office side.Because each OMM route and not all interconnecting, adopt traditional directly to be difficult to reach the synchronous purpose of all OMM synchronously with certain NTP (Network Time Protocol) (NTP) clock source.
In order to solve above-mentioned inconsistent problem of cdma base station network management system time, need provide a kind of mechanism to realize the clock synchronization of cdma base station network management system.
Summary of the invention
In order to solve above-mentioned technical problem, a kind of method of cdma base station network management system clock synchronization is provided, its purpose is, realizes the clock synchronization between the cdma base station network management system, guarantees OMC network management system time unanimity.
The invention provides a kind of method of cdma base station network management system clock synchronization, may further comprise the steps:
Step 1 selects a district level administrative center as the clock source, is used for network management center and selects the reference clock source of network management system clock synchronization or the user's configuration district level administrative center as the clock source;
Step 2, the gps time of described district level administrative center and cdma base station carries out synchronously, is used for determining the time in described clock source;
Step 3, district level administrative center and described network management center except that described district level administrative center are synchronous, are used for the time of synchronizing network management system.
In the described step 1, network management center selects the reference clock source of network management system clock synchronization to send the User Data Protocol packet by described network management center to all district level administrative centers, chooses and returns a shortest district level administrative center of User Data Protocol packet delay as the clock source.
Described step 2 may further comprise the steps:
Step 31, described district level administrative center start with the gps time of cdma base station synchronously, the message of hair band timestamp is given cdma base station;
Step 32, cdma base station is received message, the gps time that obtains is inserted in the return messages, and this message is returned to described district level administrative center;
Step 33 is resolved after message is received by a level administrative center in described district, if message is wrong, return warning information, otherwise calculate the time deviation of self, the adjustment of the line time of going forward side by side, the deadline synchronously.
Described step 3 may further comprise the steps:
Step 41, the district level administrative center startup except that described district level administrative center is synchronous with described network management center, by NTP (Network Time Protocol) message format structure message, sends to described network management center;
Step 42 after message is received by described network management center, according to NTP (Network Time Protocol) message format structure return messages, sends to the district level administrative center except that described district level administrative center;
Step 43, the message of returning is received and resolved in the district level administrative center except that described district level administrative center, calculates the time deviation of self and described network management center, and adjust the time of self according to deviation.
The shortest foundation of User Data Protocol packet delay is that described network management center receives the value minimum that the difference of returning the timestamp of bag and the timestamp that described network management center sends deducts the difference of the timestamp that timestamp that district level administrative center receives and district grade administrative center receive.
The invention provides a kind of method of cdma base station network management system clock synchronization, finish synchronously by the gps time that is received with cdma base station.The user can be switched in this different base station by user interface, realize whole OMC network management system synchronously, having solved the OMC time departs from inconsistent problem of time between normal time and the OMC, has improved the accuracy and the accuracy of OMC network management system clock.
Description of drawings
Fig. 1 is that OMC webmaster of the present invention is with the synchronous schematic diagram of foreground NE;
Fig. 2 is that OMC webmaster of the present invention is with the synchronous flow chart of foreground NE.
Embodiment
The invention provides a kind of method of cdma base station network management system clock synchronization.
The OMC network management system comprises NMC and OMM.The method of synchronization that system provides is to obtain gps time from cdma base station, and is synchronous to backstage OMM then.The NMC service end is synchronous to this OMM, and the client of other OMM and NMC is synchronous with its service end respectively, thereby reaches the purpose of all clock synchronizations of OMC system.
Method of the present invention comprises following processing procedure:
The first step, user configurable clock generator source information on NMC user side interface.
Second step, NMC is synchronous with clock source OMM, and clock source OMM starts with foreground NE synchronization program, and the free inside story of stabbing of structural belt is to foreground NE.
The 3rd step, foreground NE receive message, fill out time of reception stamp and transmitting time and stab, and construct return messages, return to the clock source OMM on backstage.
The 4th step, clock source OMM receive return messages, the parsing time, carry out synchronously with foreground NE.
The 5th step, all the other OMM start the synchronization program with NMC.Separately time and the time of NMC are carried out synchronously.
The invention provides the clock synchronizing method of OMC network management system, comprise following detailed step:
Step S1002, provincial network management service starts, and selects an Operation and Maintenance end OMM according to the related algorithm Automatic sieve and does the clock source; Make handover operation if start the back user, will be as the criterion with the clock source that the user selectes, and the OMM clock source record that the user selectes is got off, each later on the startup does this clock source with this OMM.
Step S1010, whether OMM oneself is the clock source to the NMC inquiry, if, execution in step S1004, S1006 and S1008; Otherwise, carry out S1012, S1014 and S1016;
Step S1004, this OMM acquired information, startup is synchronous with cdma base station, and the message of hair band timestamp is given cdma base station;
Step S1006, cdma base station is received message, obtains gps time and inserts in the return messages according to relevant message format, and this message is returned to Operation and Maintenance end OMM;
Step S1008, OMM receives message, resolves, if message is wrong, returns warning information, otherwise according to the time deviation of algorithm computation self, the adjustment of the line time of going forward side by side, the deadline synchronously;
Step S1012, all the other OMM startups are synchronous with NMC's, press NTP message format structure message, send to NMC;
Step S1014, NMC receives message, the message according to NTP message format structure returns sends to corresponding OMM.
Step S1016, OMM receive and resolve the message of returning, and calculate the time deviation of OMM and NMC according to related algorithm, and adjust the time of OMM according to deviation.
In step S1002, related algorithm refers to that NMC sends User Data Protocol (UDP) packet to all OMM, wraps the network delay that calculates each bag according to the UDP that returns, and calculating is undertaken by following computing formula.Choose then and return a shortest OMM of UDP packet delay as the clock source.
The timestamp that time stamp T 2 OMM that T1 NMC sends receive
T3 OMM sends time stamp T 4 NMC that return bag and receives the timestamp that returns bag
Round-trip propagation delay d is defined as:
d＝(T4-T1)-(T2-T3)
By technique scheme, the present invention is by considering cdma base station gps clock source, and the clock synchronization treatment mechanism of passing through to be provided is finished the clock synchronization of OMC system.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Figure 1, OMC network management system according to the present invention comprises the Operation and Maintenance end OMM service end and the OMM client of NMC service end, NMC client and NMC management.NE refers to network element device that OMM manages such as cdma base station etc.
As shown in Figure 2, clock synchronizing method according to the present invention may further comprise the steps:
Step S1002, in the NMC client, by the user by user interface input NMC synchronous OMM clock source, perhaps from existing OMM clock source, switch.The OMM clock source information sends to the NMC service end.User interface is used to provide modification, preserves operations such as detecting OMM clock source.
Step S1010, whether OMM is the clock source to the NMC inquiry, if, execution in step S1004, S1006 and S1008; Otherwise, carry out S1012, S1014 and S1016;
Step S1004, OMM establish this OMM note and make A as the clock source, and A starts with its cdma base station of managing regularly synchronously, and the free inside story of stabbing of hair band is to cdma base station.
Step S1006 after cdma base station is received message, will resolve message, and the structure return messages, time of reception stamp, transmitting time be stabbed put into return messages, and send to backstage OMM; Wherein, backstage OMM is as follows with the time format of cdma base station interaction message:
The expression of webmaster OMM side time had referred to since webmaster OMM was with respect to 0: 0: 0 on the 1st January in 1970 to express with the data of second+millisecond time of experience, and the data more than second show that with stopwatch the data below second are shown with bold and unconstrained stopwatch:
typedef?struct?tagT_UTCTime{
DWORD UTC_Seconds; Second
DWORD UTC_MillSeconds; Millisecond
}T_UTCTime；/
The expression of network element cdma base station side time: refer to the time that the time on the cdma base station was experienced with respect to 0: 0: 0 on the 1st January of 2000 fiducial time, express that second above data show that with stopwatch second following data are shown with bold and unconstrained stopwatch) with the data of second+millisecond
typedef?struct?tagTIME
{
WORD32 dwSecond; / * * second/
WORD16 wMilliSec; / * millisecond */
BYTE ucPad[2]; / * byte-aligned */
}T_Time；
Synchronous transmitting time is stabbed, time of reception stabs and represents with top structure respectively.
typedef?struct?tagT_SyncTime
{
BYTE?LI；
BYTE ucPad[3]; / * byte-aligned replenish */
T_UTCTime originateTimeStamp; The time * of/* OMM transmission message/
T_Time receiveTimeStamp; / cdma base station receive the time * of message/
T_Time transmitTimeStamp; The time * of/* cdma base station transmission message/
T_UTCTime reserved; / * reservation */
}T_SyncTime；
//receiveTimeStamp and transmitTimeStamp record are from the time gap of fiducial time, and the time reference of two parameters is same benchmark.
Step S1008, OMM receives message, according to writing down the time that message is returned, and resolves message, calculates according to each timestamp to postpone and the time deviation of AM/BAM.And come the adjustment time according to deviation.
Step S1012, all the other OMM startups are synchronous with NMC's, press NTP message format structure message, send to NMC.
Step S1014, NMC receives message, the message according to NTP message format structure returns sends to corresponding OMM.
Step S1016, OMM receive and resolve the message of returning, and calculate the time deviation of OMM and NMC according to related algorithm, and adjust the time of OMM according to deviation.
Among the present invention, the clock synchronization module interface of NMC client user interface comprises clock source configuration module, the user can pass through a certain OMM of this block configuration system synchronization as the clock source, the NMC client is notified to the NMC service end with the clock source of configuration, and this OMM will start with the gps time on the base station of being managed and carry out synchronously.If the gps time that this base station obtains is wrong, the OMM service end detects relevant information, with this base station synchronization of difference, and is as the criterion with self.If the foreground time is correct, then carry out clock synchronization normally.The NMC user interface also comprises automatic synchronization module.Automatically synchronization module will be responsible for synchronous with the NMC service end periodically.
The NMC service end comprises the clock agency service.Also contain regularly with the synchronous mechanism of OMM service end.
The OMM service end comprises the clock agency service.GPS lock in time on the same stylobate station.
Client and service end can also comprise the miscellaneous function module, are used to finish utility function, realize public algorithm.
Those skilled in the art can also carry out various modifications to above content under the condition that does not break away from the definite the spirit and scope of the present invention of claims.Therefore scope of the present invention is not limited in above explanation, but determine by the scope of claims.
Claims (5)
1. the method for a cdma base station network management system clock synchronization is characterized in that, may further comprise the steps:
Step 1 selects a district level administrative center as the clock source, is used for network management center and selects the reference clock source of network management system clock synchronization or the user's configuration district level administrative center as the clock source;
Step 2, the gps time of described district level administrative center and cdma base station carries out synchronously, is used for determining the time in described clock source;
Step 3, district level administrative center and described network management center except that described district level administrative center are synchronous, are used for the time of synchronizing network management system.
2. the method for cdma base station network management system clock synchronization as claimed in claim 1, it is characterized in that, in the described step 1, network management center selects the reference clock source of network management system clock synchronization to send the User Data Protocol packet by described network management center to all district level administrative centers, chooses and returns a shortest district level administrative center of User Data Protocol packet delay as the clock source.
3. the method for cdma base station network management system clock synchronization as claimed in claim 1 is characterized in that, described step 2 may further comprise the steps:
Step 31, described district level administrative center start with the gps time of cdma base station synchronously, the message of hair band timestamp is given cdma base station;
Step 32, cdma base station is received message, the gps time that obtains is inserted in the return messages, and this message is returned to described district level administrative center;
Step 33 is resolved after message is received by a level administrative center in described district, if message is wrong, return warning information, otherwise calculate the time deviation of self, the adjustment of the line time of going forward side by side, the deadline synchronously.
4. the method for cdma base station network management system clock synchronization as claimed in claim 1 is characterized in that, described step 3 may further comprise the steps:
Step 41, the district level administrative center startup except that described district level administrative center is synchronous with described network management center, by NTP (Network Time Protocol) message format structure message, sends to described network management center;
Step 42 after message is received by described network management center, according to NTP (Network Time Protocol) message format structure return messages, sends to the district level administrative center except that described district level administrative center;
Step 43, the message of returning is received and resolved in the district level administrative center except that described district level administrative center, calculates the time deviation of self and described network management center, and adjust the time of self according to deviation.
5. the method for cdma base station network management system clock synchronization as claimed in claim 2, it is characterized in that the shortest foundation of User Data Protocol packet delay is that described network management center receives the value minimum that the difference of returning the timestamp of bag and the timestamp that described network management center sends deducts the difference of the timestamp that timestamp that district level administrative center receives and district grade administrative center receive.
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| CN2006101648426A CN101197610B (en) | 2006-12-06 | 2006-12-06 | Clock synchronization method of CDMA base station network management system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2463074A (en) * | 2008-09-02 | 2010-03-03 | Ip Access Ltd | Cellular communications unit and method for selecting a timing reference source and synchronisation of unit with source |
| WO2013010405A1 (en) * | 2011-07-20 | 2013-01-24 | 中兴通讯股份有限公司 | System synchronization control method and apparatus |
| CN113489599A (en) * | 2021-05-27 | 2021-10-08 | 国网浙江省电力有限公司湖州供电公司 | Substation time synchronization verification system and time synchronization defect elimination method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5261118A (en) * | 1991-10-04 | 1993-11-09 | Motorola, Inc. | Simulcast synchronization and equalization system and method therefor |
| CN1428965A (en) * | 2001-12-25 | 2003-07-09 | 深圳市中兴通讯股份有限公司上海第二研究所 | Method for correcting clock ageing of telecommunication equipment |
| CN100401677C (en) * | 2002-11-23 | 2008-07-09 | 中兴通讯股份有限公司 | Method for realizing clock synchronization of fixed network short message platform |
| CN100493047C (en) * | 2003-04-03 | 2009-05-27 | 华为技术有限公司 | Method for synchronously implementing web tube total web clock |
| CN100492955C (en) * | 2004-01-18 | 2009-05-27 | 华为技术有限公司 | Method and device for dynamaically saving GPS time |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2463074A (en) * | 2008-09-02 | 2010-03-03 | Ip Access Ltd | Cellular communications unit and method for selecting a timing reference source and synchronisation of unit with source |
| GB2463074B (en) * | 2008-09-02 | 2010-12-22 | Ip Access Ltd | Communication unit and method for selective frequency synchronisation in a cellular communication network |
| US8768400B2 (en) | 2008-09-02 | 2014-07-01 | Ip.Access Limited | Communication unit and method for selective frequency synchronization in a cellular communication network |
| WO2013010405A1 (en) * | 2011-07-20 | 2013-01-24 | 中兴通讯股份有限公司 | System synchronization control method and apparatus |
| CN113489599A (en) * | 2021-05-27 | 2021-10-08 | 国网浙江省电力有限公司湖州供电公司 | Substation time synchronization verification system and time synchronization defect elimination method |
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