CN104349449A - Clock skew adjustment method and device of whole-network base stations - Google Patents
Clock skew adjustment method and device of whole-network base stations Download PDFInfo
- Publication number
- CN104349449A CN104349449A CN201310313880.3A CN201310313880A CN104349449A CN 104349449 A CN104349449 A CN 104349449A CN 201310313880 A CN201310313880 A CN 201310313880A CN 104349449 A CN104349449 A CN 104349449A
- Authority
- CN
- China
- Prior art keywords
- clock
- clock jitter
- base stations
- adjacent
- target
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
- H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
Abstract
The invention discloses a clock skew adjustment method and device of whole-network base stations and relates to the mobile communication field. The method comprises the following steps that: a reference base station in the whole-network base stations is determined; first clock skew between every two adjacent base stations in the whole-network base stations is calculated; shortest paths from the reference base station to each target base station are found according to a shortest path algorithm; according to the first clock skew between every two adjacent base stations on the shortest paths from the reference base station to each target base station, second clock skew from the reference base station to each target base station is obtained and saved to corresponding target base stations; and when each target base station receives clock adjustment instructions transmitted by the reference base station, the clock skew is adjusted according to the saved second clock skew. According to the clock skew adjustment method and device of the whole-network base stations of the invention, first-order linear regression and the shortest path algorithm are adopted, and therefore, required time for the synchronization of the whole-network base stations is short, and synchronization precision of the target base stations far away from the reference base station is high.
Description
Technical field
The present invention relates to moving communicating field, specifically, relate to a kind of clock jitter method of adjustment and device of all basic station over network.
Background technology
Mobile communication system does not require clock synchronous between base station, but in nonsynchronous network, disturb uncontrollable with frequency and adjacent frequency, IRC(Interference Rejection Combining, AF panel merges), DFCA(Dynamic Frequency and Channel Allocation, dynamic frequency and channel allocation), SAIC(Single Antenna Interference Cancellation, single antenna interference cancellation) etc. the result of use of function, not as good in synchronizing network, or cannot use at all, so all basic station over network clock synchronous is significant.
Current industry realizes base station clock synchronization two kinds of common practice, and the first is hard synchronous, installs a GPS(Global Positioning System, global positioning system to each base station), make all basic station over network reach clock synchronous.The advantage of this way is that synchronization accuracy is high, and shortcoming needs to increase extra hardware cost and construction complexity, also may, by the impact of the factor such as weather, geography, cause gps signal to receive unstable.
Another kind method is synchronously soft, and by software simulating clock synchronous, existing manufacturer realizes this function at present.Soft synchronous basic procedure is such, first determine that certain base station in network is Reference BTS, then the clock bias data between it and adjacent target base station is collected, according to departure, clock adjustment is carried out to adjacent target base station, around Reference BTS one circle target BS is made all to reach clock synchronous, then with synchronous target BS for Reference BTS.Repeat this process, collect and clock adjustment through rounds of ground deviation data, from initial Reference BTS, a circle circle is outwards synchronous, and final all basic station over network reaches synchronous.The advantage of this method only need change software just can realize, and do not increase hardware cost, also do not have the unfavorable factor that GPS is synchronous.Shortcoming is that to reach the synchronous required time of all basic station over network longer, and, from Reference BTS more away from base station, synchronization accuracy is also lower.
The present invention is directed to current soft synchronous the whole network lock in time long, from Reference BTS more away from the lower shortcoming of precision, propose and to return based on first-order linear and a kind of clock jitter method of adjustment of all basic station over network of shortest path first and device.
Summary of the invention
The object of the present invention is to provide a kind of clock jitter method of adjustment and device of all basic station over network, can solve better the synchronous required time of current clock soft synchronous method the whole network long, from Reference BTS more away from the lower problem of precision.
According to an aspect of the present invention, provide a kind of clock jitter method of adjustment of all basic station over network, comprise the following steps:
Determine the Reference BTS in all basic station over network;
Calculate the first clock jitter between all adjacent two base stations in described all basic station over network respectively;
According to shortest path first, find out the shortest path from Reference BTS to each target BS;
According to the first clock jitter between Reference BTS to all adjacent two base stations on the shortest path of each target BS, obtain the second clock deviation of Reference BTS to each target BS respectively, and be saved in corresponding target BS;
Each target BS, when receiving the clock adjustment order that Reference BTS sends, according to preserved second clock deviation, adjusts its clock jitter.
Preferably, the described concrete steps calculating the first clock jitter in described all basic station over network between all adjacent two base stations respectively comprise:
Collect the many groups clock bias data in all basic station over network between all adjacent two base stations respectively;
Linear regression algorithm was used to collected described many group clock bias data, obtain the clock jitter first-order linear regression equation between all adjacent two base stations respectively, utilize the first clock jitter between all adjacent two base stations in all basic station over network described in described clock jitter first-order linear regression equation calculation;
Wherein, described clock bias data comprises timestamp and clock jitter.
Preferably, described according to shortest path first, the concrete steps found out from Reference BTS to the shortest path of each target BS comprise:
According to the first clock jitter between adjacent two base stations, structure all basic station over network clock jitter relation path figure;
According to shortest path first, from described all basic station over network clock jitter relation path figure, find out the shortest path from Reference BTS to each target BS.
Preferably, described according to the first clock jitter between adjacent two base stations, the concrete steps of structure all basic station over network clock jitter relation path figure comprise:
Judge whether there is the first clock jitter between adjacent two base stations respectively;
If there is the first clock jitter between adjacent two base stations, then construct the relation path between adjacent two base stations;
If there is not the first clock jitter between adjacent two base stations, then do not deal with.
Preferably, obtain Reference BTS described in obtain to the second clock deviation of each target BS by the clock jitter value between Reference BTS to all adjacent two base stations on the shortest path of each target BS is superposed respectively.
Preferably, described to collected described many group clock bias data utilization linear regression algorithm, the step obtaining the clock jitter first-order linear regression equation between all adjacent two base stations respectively comprises:
Linear regression algorithm was used to collected described many group clock bias data, obtains the first clock jitter first-order linear regression equation;
Utilize described first clock jitter first-order linear regression equation, calculate the standard deviation of described first clock jitter;
According to the standard deviation of described first clock jitter, preset the first threshold value, from described many group clock bias data, the clock bias data found out higher than described first threshold value is deleted;
Repeat above-mentioned steps, linear regression algorithm process is used again to remaining many group clock bias data, until when described many group clock bias data are all lower than current threshold value, obtain the clock jitter first-order linear regression equation between all adjacent two base stations.
According to a further aspect in the invention, provide a kind of clock jitter adjusting device of all basic station over network, comprising:
Determination module, for determining the Reference BTS in all basic station over network;
Obtain the first clock jitter module, for calculating the first clock jitter in described all basic station over network between all adjacent two base stations respectively;
Obtain shortest path module, for according to shortest path first, find out the shortest path from Reference BTS to each target BS;
Obtain second clock tolerance module, for according to the first clock jitter between Reference BTS to all adjacent two base stations on the shortest path of each target BS, obtain the second clock deviation of Reference BTS to each target BS respectively, and be saved in corresponding target BS;
Adjusting module, for each target BS when receiving the clock adjustment order that Reference BTS sends, according to preserved second clock deviation, adjusts its clock jitter.
Preferably, described acquisition first clock jitter module comprises:
Search unit, for collecting the many groups clock bias data in all basic station over network between all adjacent two base stations respectively;
Computing unit, for using linear regression algorithm to collected described many group clock bias data, obtain the clock jitter first-order linear regression equation between all adjacent two base stations respectively, utilize the first clock jitter between all adjacent two base stations in all basic station over network described in described clock jitter first-order linear regression equation calculation;
Wherein, described clock bias data comprises timestamp and clock jitter.
Preferably, described acquisition shortest path module comprises:
Structural unit, for according to the first clock jitter between adjacent two base stations, constructs all basic station over network clock jitter relation path figure;
Acquiring unit, for according to shortest path first, finds out the shortest path from Reference BTS to each target BS from described all basic station over network clock jitter relation path figure.
Preferably, described structural unit comprises:
Judging unit, for judging whether there is the first clock jitter between adjacent two base stations respectively;
Structure path unit, for there is the first clock jitter between adjacent two base stations, then constructs the relation path between adjacent two base stations.
Compared with prior art, beneficial effect of the present invention is:
The present invention is based on first-order linear to return and the disposable deviation of the whole network clock of shortest path first calculates and method of adjustment, make the soft synchronizing speed of the whole network clock sooner, precision is higher.
Accompanying drawing explanation
Fig. 1 is the clock bias data Collection and conservation schematic diagram that prior art provides;
Fig. 2 is the clock jitter method of adjustment flow chart of a kind of all basic station over network provided by the invention;
Fig. 3 is the clock jitter adjusting device schematic diagram of a kind of all basic station over network provided by the invention;
Fig. 4 is the clock jitter method of adjustment flow chart of a kind of all basic station over network that the embodiment of the present invention provides;
Fig. 5 is all basic station over network clock jitter relation path figure that the embodiment of the present invention provides.
Embodiment
Below in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail, should be appreciated that following illustrated preferred embodiment is only for instruction and explanation of the present invention, is not intended to limit the present invention.
The present invention has improvement reaching in all basic station over network clock synchronous required time and synchronization accuracy two.Use linear regression algorithm, the clock jitter between two between adjacent base station can be made to state more accurate.Adopt shortest path first, do not need to there is direct clock jitter measurement data between Reference BTS, just can convert out the clock jitter of any target BS, therefore one-time calculation the clock jitter of all basic station over network can be gone out, simultaneously, the the most short of path ensures that experience base station number is minimum, at utmost reduces the accumulative loss of significance in conversion process.
Fig. 2 shows the clock jitter method of adjustment flow chart of a kind of all basic station over network provided by the invention, as shown in Figure 2, comprises the following steps:
Step S201: determine the Reference BTS in all basic station over network;
Step S202: calculate the first clock jitter between all adjacent two base stations in described all basic station over network respectively;
Step S203: according to shortest path first, finds out the shortest path from Reference BTS to each target BS;
Step S204: according to the first clock jitter between Reference BTS to all adjacent two base stations on the shortest path of each target BS, obtain the second clock deviation of Reference BTS to each target BS respectively, and be saved in corresponding target BS;
Step S205: each target BS, when receiving the clock adjustment order that Reference BTS sends, according to preserved second clock deviation, adjusts its clock jitter.
The described concrete steps calculating the first clock jitter in described all basic station over network between all adjacent two base stations respectively comprise: collect the many groups clock bias data in all basic station over network between all adjacent two base stations respectively; Linear regression algorithm was used to collected described many group clock bias data, obtain the clock jitter first-order linear regression equation between all adjacent two base stations respectively, utilize the first clock jitter between all adjacent two base stations in all basic station over network described in described clock jitter first-order linear regression equation calculation; Wherein, described clock bias data comprises timestamp and clock jitter.
Described according to shortest path first, the concrete steps found out from Reference BTS to the shortest path of each target BS comprise: according to the first clock jitter adjacent two base stations, structure all basic station over network clock jitter relation path figure; According to shortest path first, from described all basic station over network clock jitter relation path figure, find out the shortest path from Reference BTS to each target BS.
Described according to the first clock jitter between adjacent two base stations, the concrete steps of structure all basic station over network clock jitter relation path figure comprise: judge whether there is the first clock jitter between adjacent two base stations respectively; If there is the first clock jitter between adjacent two base stations, then construct the relation path between adjacent two base stations; If there is not the first clock jitter between adjacent two base stations, then do not deal with.
The described Reference BTS that obtains obtains to the second clock deviation of each target BS by the clock jitter value between Reference BTS to all adjacent two base stations on the shortest path of each target BS being superposed respectively.
Described to collected described many group clock bias data utilization linear regression algorithm, the step obtaining the clock jitter first-order linear regression equation between all adjacent two base stations respectively comprises: used linear regression algorithm to collected described many group clock bias data, obtain the first clock jitter first-order linear regression equation; Utilize described first clock jitter first-order linear regression equation, calculate the standard deviation of described first clock jitter; According to the standard deviation of described first clock jitter, preset the first threshold value, from described many group clock bias data, the clock bias data found out higher than described first threshold value is deleted; Repeat above-mentioned steps, linear regression algorithm process is used again to remaining many group clock bias data, until when described many group clock bias data are all lower than current threshold value, obtain the clock jitter first-order linear regression equation between all adjacent two base stations.
Fig. 3 shows the clock jitter adjusting device schematic diagram of a kind of all basic station over network provided by the invention, as shown in Figure 3, comprising: determination module 301, for determining the Reference BTS in all basic station over network; Obtain the first clock jitter module 302, for calculating the first clock jitter in described all basic station over network between all adjacent two base stations respectively; Obtain shortest path module 303, for according to shortest path first, find out the shortest path from Reference BTS to each target BS; Obtain second clock tolerance module 304, for according to the first clock jitter between Reference BTS to all adjacent two base stations on the shortest path of each target BS, obtain the second clock deviation of Reference BTS to each target BS respectively, and be saved in corresponding target BS; Adjusting module 305, for each target BS when receiving the clock adjustment order that Reference BTS sends, according to preserved second clock deviation, adjusts its clock jitter.
Acquisition first clock jitter module 302 of the present invention comprises: search unit, for collecting the many groups clock bias data in all basic station over network between all adjacent two base stations respectively; Computing unit, for using linear regression algorithm to collected described many group clock bias data, obtain the clock jitter first-order linear regression equation between all adjacent two base stations respectively, utilize the first clock jitter between all adjacent two base stations in all basic station over network described in described clock jitter first-order linear regression equation calculation; Wherein, described clock bias data comprises timestamp and clock jitter.
Acquisition shortest path module 303 of the present invention comprises: structural unit, for according to the first clock jitter between adjacent two base stations, constructs all basic station over network clock jitter relation path figure; Acquiring unit, for according to shortest path first, finds out the shortest path from Reference BTS to each target BS from described all basic station over network clock jitter relation path figure; Wherein, described structural unit comprises: judging unit, for judging whether there is the first clock jitter between adjacent two base stations respectively; Structure path unit, for there is the first clock jitter between adjacent two base stations, then constructs the relation path between adjacent two base stations.
Fig. 4 shows the clock jitter method of adjustment flow chart of a kind of all basic station over network that the embodiment of the present invention provides, and as shown in Figure 4, comprises the following steps:
Step S401: collect the many groups clock bias data between two between adjacent base station.
Described clock bias data comprises timestamp and clock jitter, wherein, described timestamp can with certain time point of past for reference, number of seconds (also can use other times unit) since this time point of value, clock jitter (also can use other unit) in units of half symbolic number, represents the clock jitter of one of them base station relative to another base station.Data saving result as shown in Figure 1.
Step S402: first-order linear regression algorithm is used to the many groups clock bias data collected, obtain the clock jitter first-order linear regression equation Y=a+b*t between two adjacent base stations, wherein t is timestamp, Y represents at the clock jitter of t base station A relative to base station B, the a clock jitter that to be timestamp be between 0 moment base station, b is the deviation increasing along with the time and increase, in addition due to the normally individual fixed value of the clock jitter between base station, when there is not the phenomenon offset in time in base station clocks all in the whole network, b can not be considered, clock jitter first-order linear regression equation is just simplified to Y=a.
Described utilization first-order linear regression algorithm, obtains being calculated as follows of the clock jitter first-order linear regression equation Y=a+b*t between two base stations:
(timestamp i)
(clock jitter i)
(timestamp i-X
a)
2
((timestamp i-X
a) × (clock jitter i-Y
a))
if(fabs(L
xx)＜le
-６)
b＝0
elSe
b=L
xy/L
xx
a=Y
a-b×X
a
Wherein, the X in above formula
atimestamp mean value, Y
aclock jitter mean value, L
xxthe total deviation of timestamp, L
xytimestamp and clock jitter deviation product summation, (i-X
a) be timestamp deviation, (i-Y
a) be clock jitter deviation, (fabs(L
xx) <le
-6) be judge whether the total deviation of timestamp is approximately 0.
The many groups clock bias data such as collected between base station i and base station j is as following table:
| Data group number | Timestamp (unit: second) | Clock jitter (the relative base station i of base station j, unit 1/2 symbol) |
| 1 | 1832 | 14128 |
| 2 | 1848 | 14127 |
| 3 | 1858 | 14126 |
| 4 | 1866 | 14127 |
| 5 | 1881 | 14126 |
| 6 | 1890 | 14127 |
| 7 | 1907 | 14126 |
| 8 | 1917 | 14127 |
| 9 | 1932 | 14127 |
| 10 | 1971 | 14128 |
| 11 | 1986 | 14126 |
| 12 | 1999 | 14128 |
| 13 | 2019 | 14126 |
| 14 | 2027 | 14127 |
Organize clock bias data by above-mentioned more, calculating base station j relative to the clock jitter first-order linear regression equation of i is Y=14126.9-0.000025 × t, represent when timestamp is 0, base station j is 14126.9 1/2 symbol relative to the clock jitter of i, along with the time increases, deviation per second reduces by 0.000025 1/2 symbol.Due to the normally individual fixed value of the clock jitter between adjacent base station, 0.00025 1/2 symbol whether considering that deviation per second reduces can be determined as required.
Repeatedly can return by step below, filter out the measurement data that error is larger, obtain the first-order linear regression equation of more high precision:
1) by first-order linear regression equation calculation standard deviation
2) set a thresholding such as 1.5, by 1.5 times of standard deviation, measurement data is filtered;
3) first-order linear regression algorithm is used again to residue measurement data, obtain new first-order linear regression equation, repeat above-mentioned 1 ~ 3 step, until do not have data to be filtered.
Special circumstances, although have clock bias data between two adjacent base stations, because measure the reasons such as stable not, final data has all been filtered, and causes there is not first-order linear regression equation.
Step S403: structure all basic station over network clock jitter relation path figure also calculates shortest path.
A node in mapping is seen in each base station, if there is clock jitter equation between two adjacent base stations, namely thinks to there is path between corresponding node, uses the shortest path first in graph theory, finds out the shortest path from Reference BTS to any target BS.As shown in Figure 5, all basic station over network clock jitter relation path figure be made up of 14 base stations is constructed.Shortest path first has a variety of, conventional as dijkstra's algorithm.Such as, from Reference BTS 1 to the shortest path of base station 7 are 1->2->7.If there is multiple Reference BTS, can attempt one by one, get repeatedly one the shortest in shortest path.
Step S404: added up by the clock jitter equation of adjacent base station on shortest path, obtains the new clock jitter equation of arbitrary target base station relative to Reference BTS.
Clock jitter equation must be there is between adjacent base station on shortest path, by the superposition of linear equation, obtain the clock jitter equation of target BS relative to Reference BTS.As shown in Figure 5, the shortest path from Reference BTS 1 to target BS 7 is 1->2->7, and wherein, base station 2 is Y relative to the clock jitter equation of base station 1
21=a
21+ b
21* t, base station 7 is Y relative to the clock jitter equation of base station 2
72=a
72+ b
72* t, can obtain base station 7 relative to the clock jitter equation of base station 1 is Y
71=(a
72+ a
21)+(b
72+ b
21) * t.
Note: known base station i is Y relative to the clock jitter equation of base station j
ij=a
ij+ b
ij* t, so base station j is Y relative to the clock jitter equation of base station i
ji=CLOCK_CYCLE-a
ij-b
ij* t, wherein CLOCK_CYCLE represents a clock cycle, and in gsm system, if with 1/2 symbol for clock jitter unit, then the value of CLOCK_CYCLE is exactly 2048*26*51*2500,1/2 symbol number namely representated by a Hyperframe.
When base station clocks all in the whole network do not exist the phenomenon offset in time, the clock jitter first-order linear regression equation between two between base station is simplified to Y=a.As shown in Figure 5, the shortest path from Reference BTS 1 to target BS 7 is 1->2->7, and wherein, base station 2 is Y relative to the clock jitter equation of base station 1
21=a
21, base station 7 is Y relative to the clock jitter equation of base station 2
72=a
72, can obtain base station 7 relative to the clock jitter equation of base station 1 is Y
71=a
72+ a
21.
It should be noted that, if there is no shortest path, as the base station 13 and 14 in Fig. 5, illustrates that the measurement data of collecting is sufficiently complete, there is the isolated island of data, this situation, can extend the data collection time on the one hand, collect the clock bias data between base station 13 or 14 and adjacent base station 7 or 2 or 6 or 12, guarantee to eliminate data silo, on the other hand, Reference BTS can be increased in the base station of isolated island, such as, base station 13 is set to Reference BTS.
Step S405: utilize clock jitter equation, calculates the clock jitter of current target base station relative to Reference BTS, issues clock adjustment order to target BS.
Calculate all target BS of the whole network relative to after the clock jitter equation of Reference BTS, issue clock adjustment order to all target BS, reach the disposable adjustment of all basic station over network clock.First equation Y=a+b*t is substituted into current time as t, the Y value calculated is exactly the clock jitter of this base station current time, here timestamp t and clock bias data collect timestamp used, be with same time in the past point for reference, then determine according to clock jitter the clock adjustment amount and the adjustment direction that are handed down to base station.
In sum, the present invention has following technique effect:
1, there is no the arbitrary target base station of neighbouring relations with Reference BTS, can clock synchronous be carried out;
2, how far no matter the whole network target BS, have from Reference BTS distance, after unified clock adjustment action sends, all can reach clock synchronous within the identical time.
Although above to invention has been detailed description, the present invention is not limited thereto, those skilled in the art of the present technique can carry out various amendment according to principle of the present invention.Therefore, all amendments done according to the principle of the invention, all should be understood to fall into protection scope of the present invention.
Claims (10)
1. a clock jitter method of adjustment for all basic station over network, is characterized in that, comprise the following steps:
Determine the Reference BTS in all basic station over network;
Calculate the first clock jitter between all adjacent two base stations in described all basic station over network respectively;
According to shortest path first, find out the shortest path from Reference BTS to each target BS;
According to the first clock jitter between Reference BTS to all adjacent two base stations on the shortest path of each target BS, obtain the second clock deviation of Reference BTS to each target BS respectively, and be saved in corresponding target BS;
Each target BS, when receiving the clock adjustment order that Reference BTS sends, according to preserved second clock deviation, adjusts its clock jitter.
2. method according to claim 1, is characterized in that, the described concrete steps calculating the first clock jitter in described all basic station over network between all adjacent two base stations respectively comprise:
Collect the many groups clock bias data in all basic station over network between all adjacent two base stations respectively;
Linear regression algorithm was used to collected described many group clock bias data, obtain the clock jitter first-order linear regression equation between all adjacent two base stations respectively, utilize the first clock jitter between all adjacent two base stations in all basic station over network described in described clock jitter first-order linear regression equation calculation;
Wherein, described clock bias data comprises timestamp and clock jitter.
3. method according to claim 1, is characterized in that, described according to shortest path first, and the concrete steps found out from Reference BTS to the shortest path of each target BS comprise:
According to the first clock jitter between adjacent two base stations, structure all basic station over network clock jitter relation path figure;
According to shortest path first, from described all basic station over network clock jitter relation path figure, find out the shortest path from Reference BTS to each target BS.
4. method according to claim 3, is characterized in that, described according to the first clock jitter between adjacent two base stations, and the concrete steps of structure all basic station over network clock jitter relation path figure comprise:
Judge whether there is the first clock jitter between adjacent two base stations respectively;
If there is the first clock jitter between adjacent two base stations, then construct the relation path between adjacent two base stations;
If there is not the first clock jitter between adjacent two base stations, then do not deal with.
5. method according to claim 1, it is characterized in that, described in obtain Reference BTS and obtain by the clock jitter value between Reference BTS to all adjacent two base stations on the shortest path of each target BS is superposed respectively to the second clock deviation of each target BS.
6. method according to claim 2, is characterized in that, described to collected described many group clock bias data utilization linear regression algorithm, the step obtaining the clock jitter first-order linear regression equation between all adjacent two base stations respectively comprises:
Linear regression algorithm was used to collected described many group clock bias data, obtains the first clock jitter first-order linear regression equation;
Utilize described first clock jitter first-order linear regression equation, calculate the standard deviation of described first clock jitter;
According to the standard deviation of described first clock jitter, preset the first threshold value, from described many group clock bias data, the clock bias data found out higher than described first threshold value is deleted;
Repeat above-mentioned steps, linear regression algorithm process is used again to remaining many group clock bias data, until when described many group clock bias data are all lower than current threshold value, obtain the clock jitter first-order linear regression equation between all adjacent two base stations.
7. a clock jitter adjusting device for all basic station over network, is characterized in that, comprising:
Determination module, for determining the Reference BTS in all basic station over network;
Obtain the first clock jitter module, for calculating the first clock jitter in described all basic station over network between all adjacent two base stations respectively;
Obtain shortest path module, for according to shortest path first, find out the shortest path from Reference BTS to each target BS;
Obtain second clock tolerance module, for according to the first clock jitter between Reference BTS to all adjacent two base stations on the shortest path of each target BS, obtain the second clock deviation of Reference BTS to each target BS respectively, and be saved in corresponding target BS;
Adjusting module, for each target BS when receiving the clock adjustment order that Reference BTS sends, according to preserved second clock deviation, adjusts its clock jitter.
8. device according to claim 7, is characterized in that, described acquisition first clock jitter module comprises:
Search unit, for collecting the many groups clock bias data in all basic station over network between all adjacent two base stations respectively;
Computing unit, for using linear regression algorithm to collected described many group clock bias data, obtain the clock jitter first-order linear regression equation between all adjacent two base stations respectively, utilize the first clock jitter between all adjacent two base stations in all basic station over network described in described clock jitter first-order linear regression equation calculation;
Wherein, described clock bias data comprises timestamp and clock jitter.
9. device according to claim 7, is characterized in that, described acquisition shortest path module comprises:
Structural unit, for according to the first clock jitter between adjacent two base stations, constructs all basic station over network clock jitter relation path figure;
Acquiring unit, for according to shortest path first, finds out the shortest path from Reference BTS to each target BS from described all basic station over network clock jitter relation path figure.
10. device according to claim 9, is characterized in that, described structural unit comprises:
Judging unit, for judging whether there is the first clock jitter between adjacent two base stations respectively;
Structure path unit, for there is the first clock jitter between adjacent two base stations, then constructs the relation path between adjacent two base stations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310313880.3A CN104349449A (en) | 2013-07-24 | 2013-07-24 | Clock skew adjustment method and device of whole-network base stations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310313880.3A CN104349449A (en) | 2013-07-24 | 2013-07-24 | Clock skew adjustment method and device of whole-network base stations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104349449A true CN104349449A (en) | 2015-02-11 |
Family
ID=52504012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310313880.3A Withdrawn CN104349449A (en) | 2013-07-24 | 2013-07-24 | Clock skew adjustment method and device of whole-network base stations |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104349449A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107925972A (en) * | 2015-08-14 | 2018-04-17 | 华为技术有限公司 | Synchronous method, base station and control network element between one kind station |
| CN110191507A (en) * | 2018-12-06 | 2019-08-30 | 杭州微萤科技有限公司 | A kind of terrestrial positioning method of wide area |
| CN111983916A (en) * | 2019-05-21 | 2020-11-24 | 深圳市合讯电子有限公司 | Multimode satellite time service precision bad value eliminating system and method |
| WO2021208862A1 (en) * | 2020-04-14 | 2021-10-21 | 华为技术有限公司 | Parameter configuration method, device and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050037786A1 (en) * | 2003-08-14 | 2005-02-17 | Siemens Information And Communication Mobile, Llc. | Precise common timing in a wireless network |
| WO2008133567A1 (en) * | 2007-04-30 | 2008-11-06 | Telefonaktiebolaget Lm Ericsson (Publ) | Synchronization time difference measurements in ofdm systems |
| CN102143578A (en) * | 2009-12-16 | 2011-08-03 | 诺基亚公司 | Method and apparatus for estimating a position of a node in a communication network |
-
2013
- 2013-07-24 CN CN201310313880.3A patent/CN104349449A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050037786A1 (en) * | 2003-08-14 | 2005-02-17 | Siemens Information And Communication Mobile, Llc. | Precise common timing in a wireless network |
| WO2008133567A1 (en) * | 2007-04-30 | 2008-11-06 | Telefonaktiebolaget Lm Ericsson (Publ) | Synchronization time difference measurements in ofdm systems |
| CN102143578A (en) * | 2009-12-16 | 2011-08-03 | 诺基亚公司 | Method and apparatus for estimating a position of a node in a communication network |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107925972A (en) * | 2015-08-14 | 2018-04-17 | 华为技术有限公司 | Synchronous method, base station and control network element between one kind station |
| US10477498B2 (en) | 2015-08-14 | 2019-11-12 | Huawei Technologies Co., Ltd. | Inter-station synchronization method, base station, and control network element |
| CN110191507A (en) * | 2018-12-06 | 2019-08-30 | 杭州微萤科技有限公司 | A kind of terrestrial positioning method of wide area |
| CN111983916A (en) * | 2019-05-21 | 2020-11-24 | 深圳市合讯电子有限公司 | Multimode satellite time service precision bad value eliminating system and method |
| WO2021208862A1 (en) * | 2020-04-14 | 2021-10-21 | 华为技术有限公司 | Parameter configuration method, device and system |
| CN113541837A (en) * | 2020-04-14 | 2021-10-22 | 华为技术有限公司 | Parameter configuration method, equipment and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107182123B (en) | A kind of synchronous method and synchronization system of UWB positioning system | |
| CN110099354A (en) | A kind of ultra-wideband communications two-dimensional location method of combination TDOA and TOF | |
| CN102023290A (en) | High-precision distributed pulse signal time difference of arrival detection system | |
| CN103581831B (en) | Indoor locating method based on WiFi and mobile terminal | |
| CN104349449A (en) | Clock skew adjustment method and device of whole-network base stations | |
| CN102256351B (en) | Indoor accurate positioning method based on wireless sensor network technique | |
| US20150148068A1 (en) | Method for estimating speed of user devices in wireless communication networks | |
| JP6366105B2 (en) | Management device, program and method for estimating floor height for each building using barometric pressure value or altitude | |
| CN101400079A (en) | Detection method and device for idle port synchronization error | |
| WO2016177090A1 (en) | Clock synchronization method and device | |
| CN102455421A (en) | Sound positioning system and method without time synchronization | |
| CN105188126A (en) | Distributed multi-hop wireless network clock synchronization method based on mean field | |
| CN104536285A (en) | High-efficiency crystal oscillator frequency timekeeping method | |
| MX2012007904A (en) | Systems and methods for wireless network routing using radio frequency distance-based virtual node locations. | |
| CN103987117A (en) | Signal transmitting station locating method based on mobile terminal monitoring | |
| CN104918317A (en) | Inter-base station interface delay compensation method, device and system | |
| CN102752852A (en) | Mobile communication positioning method based on code division multiple access (CDMA) base station | |
| CN103744082B (en) | Based on the passive radar water vapor detecting method of DMB signal | |
| CN201945685U (en) | High-accuracy time difference of arrival (TDOA) measuring system for distribution type pulse signals | |
| CN104780602A (en) | Clock self-synchronizing method in wireless communication network | |
| CN102378217A (en) | Beacon node credit assessment method in localization in wireless sensor networks | |
| CN106455052A (en) | Positioning method and device | |
| KR101214452B1 (en) | Method for synchronizing of clock between sensor nodes in wireless sensor network | |
| CN114689056B (en) | Accurate ranging method based on UWB SS-TWR | |
| CN103796158B (en) | Method and system for judging whether electronic equipment is used out of scope and electronic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20150211 |