CN202160283U - Detection device for confirming whether clock of base station is synchronous - Google Patents
Detection device for confirming whether clock of base station is synchronous Download PDFInfo
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- CN202160283U CN202160283U CN2011201861584U CN201120186158U CN202160283U CN 202160283 U CN202160283 U CN 202160283U CN 2011201861584 U CN2011201861584 U CN 2011201861584U CN 201120186158 U CN201120186158 U CN 201120186158U CN 202160283 U CN202160283 U CN 202160283U
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- base station
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- gps
- clock signal
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Abstract
The utility model discloses a detection device for confirming whether a clock of a base station is synchronous. The detection device comprises a base band unit of the base station and a clock module positioned on a mainboard of the base station, wherein the clock module comprises a time delay detection module and a GPS receiver connected with the GPS antenna of the base station; the time delay detection module comprises a receiving unit; the receiving unit is connected with the GPS receiver so as to acquire the clock signal of the GPS and serve as the clock signal of the base station; the receiving unit is further connected with the base band unit so as to acquire the clock signal of the adjacent base station form the signal received by the antenna in a fan area of the base station; and the time delay detection module further comprises a calculating unit used for calculating the transmission time delay for transmitting the clock signal from the adjacent base station to the current base station and comparing the difference value between the transmission time delay and a standard time delay with a preset threshold. The detection device is capable of effectively reducing hardware design requirement, simplifying design difficulty of software and reducing design cost; and has the advantages of simple structure and low cost.
Description
Technical field
Whether synchronous the utility model relates to communication technical field, be specifically related to a kind of checkout gear that is used for confirming between base station clock.
Background technology
In 3G three big standards, CDMA2000 and Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) all are synchro systems.Require between all base stations the strict retention time synchronous, minizone switching, system's operation etc. all need precise time control, and stationary problem is very important for the TD-SCDMA communication system.Current TD-SCDMA generally adopts the base station GPS (global positioning system) to carry out synchronously, and promptly all base stations are all synchronous with the clock maintenance of GPS.
Can cause the clock signal of base station clock and GPS to have the phenomenon of deviation GPS step-out when the base station clock processing unit breaks down in Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) system.The GPS step-out causes occurrence timing deviation between the base station, and timing offset crosses that senior general influences that mobile phone searching adjacent area, sub-district are switched, DwPTS is to the interference of up guide time slot (UpPTS) etc.These will further influence network quality, cause handoff failure, switching call drop, call completion ratio to descend, and have a strong impact on the impression of user in network.Discover that when GPS step-out 4 chips (chip) are above significantly descending appears in network quality; When GPS step-out 10 chips (chip) are above, mobile phone occur and search less than the adjacent area.Result of study shows: in order not influence network performance, the GPS step-out maximum timing deviation that the TD-SCDMA system allows is 4 chips (chip).In order to guarantee the network quality of TD-SCDMA grid, need the base station of GPS step-out in the timely discovery system, and effectively handle, reduce the influence that the base station of GPS step-out produces network quality.
At present, each equipment vendors loses the base station that faults such as star, gps antenna short circuit, gps antenna open circuit cause to GPS GPS step-out problem provides clear and definite alarm scheme, makes the attendant in time find fault and handles the normal operation of support equipment.But, also can't detect owing to GPS step-out problem that reason causes such as hardware problem, device performance be not up to standard for some, can not in time report corresponding alarm.As in the TD-SCDMA network, to because the stealthy fault of the gps clock processing unit of base station or because the gps antenna decreased performance causes the GPS step-out of base station, existing systems can't detect automatically.
The utility model content
Whether to the above-mentioned defective that prior art exists, whether synchronous the problem that the utility model will solve provided a kind of checkout gear that is used for confirming between base station clock, be used for confirming between the clock of any two base stations of TD-SCDMA communication network synchronous.
For addressing the above problem; Whether synchronous the utility model provide a kind of checkout gear that is used for confirming between base station clock; Clock module on the Base Band Unit that comprises said base station and the master control borad that is positioned at said base station, said clock module comprises time delay detection module and the GPS receiver that is connected with the gps antenna of said base station; Said time delay detection module comprises receiving element; Said receiving element is connected with said GPS receiver to obtain the gps clock signal and as the clock signal of base station, said receiving element also is connected with said Base Band Unit to obtain the clock signal of said base stations neighboring the signal that is received from said sector of base station antenna; Said time delay detection module comprises that also the clock signal that is used to calculate said base stations neighboring is sent to the propagation delay time of this base station and the computing unit that compares the difference between said propagation delay time and the benchmark time delay and preset threshold value.
As preferably, also comprise the local operation maintenance terminal and be positioned at alarm module and the operational module on the said master control borad that said alarm module is connected with the computing unit of said time delay detection module; Said alarm module is connected with said display unit through said operational module.
As preferably, also comprise remote monitoring and maintenance terminal, said remote monitoring is connected with said operational module through the IUB mouth with maintenance terminal.
As preferably, said sector of base station antenna and said Base Band Unit are connected with remote radio unit (RRU).
Preferred further, be connected through the IR interface between said Base Band Unit and the said remote radio unit (RRU).
Whether whether synchronous being used for of the utility model confirm between base station clock checkout gear, compares through propagation delay time and the benchmark time delay of measuring between the adjacent base station, synchronous with the clock of definite any two base stations; Thereby detect the base station of gps clock step-out; Can effectively reduce the hardware designs demand, simplify the Software Design difficulty, reduce design cost; Have simple in structure, the advantage that cost is low.
Description of drawings
Whether synchronous Fig. 1 be the structural representation that is used for confirming between base station clock checkout gear of the embodiment of the utility model;
Whether synchronous Fig. 2 be the structural representation that is used for confirming between base station clock the time delay detection module of checkout gear shown in Figure 1.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail, but not as the qualification to the utility model.
Present embodiment is that example describes with the base station that is applied in the TD-SCDMA communications network system, and wherein, said TD-SCDMA communication network comprises three above base stations.Be provided with all on each base station whether synchronous present embodiment is described is used for confirming between base station clock checkout gear, be used for detecting between the clock of two adjacent base stations of communication network whether synchronously.As shown in Figure 1; Being used for of the embodiment of the utility model confirms between base station clock that synchronous checkout gear whether comprises the clock module 40 on Base Band Unit 22 and the master control borad that is positioned at the base station, and clock module 40 comprises time delay detection module 1 and the GPS receiver 30 that is connected with the gps antenna 10 of base station.As shown in Figure 2; Time delay detection module 1 comprises receiving element 11 and computing unit 12; Receiving element 11 is connected with GPS receiver 30 with the gps clock signal that obtains the base station and as the clock signal of this base station, and receiving element 11 is connected the clock signal of the base stations neighboring that is used for obtaining the received signal of sector of base station antenna 20 with Base Band Unit 22; The clock signal that computing unit 12 is used to calculate base stations neighboring is sent to the propagation delay time of this base station and compares the difference and the preset threshold value of propagation delay time and benchmark time delay.As shown in Figure 1, in the present embodiment, be connected with RRU (Remote RF Unit is a remote radio unit (RRU)) 21 between the receiving element 11 of sector of base station antenna 20 and time delay detection module 1, be connected through the IR interface between remote radio unit (RRU) and the Base Band Unit.IR (Interface between the RRU and the NodeB) interface promptly is used to connect the interface between remote radio unit (RRU) and the Base Band Unit.Sector of base station antenna 20 received signals are handled after the IR interface is sent to Base Band Unit 22 through remote radio unit (RRU), and Base Band Unit 22 is the receiving element 11 that sends time delay detection module 1 through the clock signal of handling the neighbour station that obtains to.
Below specify the course of work that is used for confirming between base station clock whether synchronous checkout gear of present embodiment.In the TD-SCDMA communication network that adopts the gps system time service, the clock signal of each base station all is consistent with the clock signal of gps system, thereby guarantees that the clock signal between any two base stations is consistent.When breaking down in certain base station, during the clock sideslip, the clock signal of its clock signal and gps system is inconsistent, just is in desynchronizing state, can not be consistent with the clock signal of the base station of other operate as normal.In normal operation,, promptly calculate the difference between the clock signal of the received base stations neighboring in clock signal and this base station of this base station, just obtain the benchmark time delay by time delay detection module 1 through measuring the signal propagation delay time between any two base stations.When the clock of all base stations in the system all was consistent with gps clock, the propagation delay time between any two base stations just equaled the benchmark time delay between them.Like Fig. 1, shown in Figure 2, the clock signal of this base station is that the receiving element 11 by time delay detection module 1 obtains from the GPS receiver 30 that is connected with the gps antenna 10 of base station.The signal at neighbour that fan antenna 20 received station is sent to the Base Band Unit 22 of base station through intermediate treatment device such as remote radio unit (RRU) 21 and interface, after Base Band Unit 22 is handled, is sent to the clock signal of adjacent base station the receiving element 11 of the time delay detection module 1 on the master control borad again.Difference between the clock signal of computing unit 12 these base stations of calculating of time delay detection module 1 and the clock signal of adjacent base station obtain propagation delay time, and whether propagation delay time and benchmark time delay are compared to confirm the two synchronous.If the difference between propagation delay time and the benchmark time delay surpasses preset threshold value, just think asynchronous between these two base stations, have at least the clock of a base station that skew has taken place.Certainly; Confirm that according to the latitude and longitude information of two base stations distance and the propagation velocity of signal between the two calculate the benchmark time delay; Promptly obtain the data of benchmark time delay divided by electromagnetic wave propagation speed, and be stored among the memory cell on the master control borad of each base station with the signal transmission distance between two base stations.
When break down in one of them base station; The benchmark time delay that base station of breaking down and the propagation delay time between the base stations neighboring just depart under the normal operating conditions to be measured; When the difference between propagation delay time and the benchmark time delay surpasses preset threshold value, just think asynchronous between these two base stations.In the present embodiment, calculate the difference between propagation delay time and the benchmark time delay, and whether more said difference is above preset threshold value, thereby the clock of definite two base stations is asynchronous by time delay detection module 1.
In the TD-SCDMA communications network system, be provided with a plurality of base stations, the quantity of base station is greater than three, and most of base station generally all can be in normal operating conditions, has only few part base station that the clock step-out can take place.When between two or more base stations that any base station is adjacent when asynchronous, just can think that this base station breaks down.
Being used for of present embodiment confirms whether synchronous checkout gear also comprises display unit 33 and the alarm module 31 and operational module 32 that are positioned on the master control borad between base station clock, and alarm module 31 is connected with the computing unit 12 of time delay detection module 1; Alarm module 31 is connected with display unit 33 through operational module 32.When time delay detection module 1 detects between this base station and the two or more base stations neighboring when asynchronous, just send alarm signal, and be presented at warning information on the display unit 33 through operational module 32 to alarm module 31.At this moment, the staff can also debug through operational module 32.
For the ease of in time finding and adjust the base station of clock step-out; As shown in Figure 1; Present embodiment be used for confirming whether synchronous checkout gear also comprises remote monitoring and maintenance terminal 34 between base station clock, remote monitoring and maintenance terminal 34 through the IUB mouth (Interface between the NodeB and the RNC be Base Band Unit with radio network controller between interface) be connected with operational module 32.
Can find out through the foregoing description; In the TD-SCDMA system; Being used for of present embodiment confirms between base station clock that whether synchronous checkout gear compare mutually the clock signal of adjacent base station; Through measuring propagation delay time and comparing, with whether synchronous between the clock of confirming two base stations with the benchmark time delay.Further, whether synchronous through the clock signal that compares a base station and two or more base stations neighboring, and then confirm that the base station of skew takes place clock, that is to say the inconsistent base station of base station clock and gps clock.
Being used for of present embodiment confirms between base station clock that synchronous checkout gear whether can detect the gps clock skew that GPS causes because of reasons such as hardware problem, device performance are not up to standard.Avoided because the risk that the network quality that the large tracts of land interference causes in the system that the gps clock skew causes descends is stablized service for carrier network and escort; Propagation delay time between the adjacent station of the utility model utilization is examined mutually, can effectively reduce the hardware designs demand, simplifies the Software Design difficulty, reduces design cost.
Certainly; The above is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also are regarded as the protection range of the utility model.
Claims (5)
1. whether synchronous one kind be used for confirming between base station clock checkout gear; It is characterized in that; Clock module on the Base Band Unit that comprises said base station and the master control borad that is positioned at said base station, said clock module comprises time delay detection module and the GPS receiver that is connected with the gps antenna of said base station;
Said time delay detection module comprises receiving element; Said receiving element is connected with said GPS receiver to obtain the gps clock signal and as the clock signal of base station, said receiving element also is connected with said Base Band Unit to obtain the clock signal of said base stations neighboring the signal that is received from said sector of base station antenna;
Said time delay detection module comprises that also the clock signal that is used to calculate said base stations neighboring is sent to the propagation delay time of this base station and the computing unit that compares the difference between said propagation delay time and the benchmark time delay and preset threshold value.
2. as claimed in claim 1ly be used for confirming between base station clock whether synchronous checkout gear; It is characterized in that; Also comprise the local operation maintenance terminal and be positioned at alarm module and the operational module on the said master control borad, said alarm module is connected with the computing unit of said time delay detection module; Said alarm module is connected with said local operation maintenance terminal through said operational module.
3. as claimed in claim 2ly be used for confirming between base station clock whether synchronous checkout gear, it is characterized in that also comprise remote monitoring and maintenance terminal, said remote monitoring is connected with said operational module through the IUB mouth with maintenance terminal.
4. as claimed in claim 1ly be used for confirming between base station clock whether synchronous checkout gear, it is characterized in that said sector of base station antenna and said Base Band Unit are connected with remote radio unit (RRU).
5. as claimed in claim 4ly be used for confirming between base station clock whether synchronous checkout gear, it is characterized in that, be connected through the IR interface between said Base Band Unit and the said remote radio unit (RRU).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201861584U CN202160283U (en) | 2011-06-03 | 2011-06-03 | Detection device for confirming whether clock of base station is synchronous |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011201861584U CN202160283U (en) | 2011-06-03 | 2011-06-03 | Detection device for confirming whether clock of base station is synchronous |
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| CN202160283U true CN202160283U (en) | 2012-03-07 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013185460A1 (en) * | 2012-06-14 | 2013-12-19 | 华为技术有限公司 | Method and device for determining clock asynchronization |
| CN103763056A (en) * | 2013-12-31 | 2014-04-30 | 电信科学技术第五研究所 | Method for time synchronization high-precision remote monitoring |
| CN104980244A (en) * | 2015-07-01 | 2015-10-14 | 大唐电信（成都）信息技术有限公司 | Input line time-delay compensation apparatus and method of time synchronization equipment |
| CN105680969A (en) * | 2015-12-31 | 2016-06-15 | 浙江中控技术股份有限公司 | Clock synchronization method and device |
| CN110798854A (en) * | 2018-08-03 | 2020-02-14 | 上海华为技术有限公司 | Clock state detection method and device |
-
2011
- 2011-06-03 CN CN2011201861584U patent/CN202160283U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013185460A1 (en) * | 2012-06-14 | 2013-12-19 | 华为技术有限公司 | Method and device for determining clock asynchronization |
| KR20150028283A (en) * | 2012-06-14 | 2015-03-13 | 후아웨이 테크놀러지 컴퍼니 리미티드 | Method and device for determining clock asynchronization |
| KR101662683B1 (en) | 2012-06-14 | 2016-10-05 | 후아웨이 테크놀러지 컴퍼니 리미티드 | Method and apparatus for determining clock desynchronization |
| US9578613B2 (en) | 2012-06-14 | 2017-02-21 | Huawei Technologies Co., Ltd. | Method and apparatus for determining clock desynchronization |
| CN103763056A (en) * | 2013-12-31 | 2014-04-30 | 电信科学技术第五研究所 | Method for time synchronization high-precision remote monitoring |
| CN104980244A (en) * | 2015-07-01 | 2015-10-14 | 大唐电信（成都）信息技术有限公司 | Input line time-delay compensation apparatus and method of time synchronization equipment |
| CN104980244B (en) * | 2015-07-01 | 2017-07-28 | 大唐电信（成都）信息技术有限公司 | Time synchronism equipment incoming line compensation of delay device and method |
| CN105680969A (en) * | 2015-12-31 | 2016-06-15 | 浙江中控技术股份有限公司 | Clock synchronization method and device |
| CN110798854A (en) * | 2018-08-03 | 2020-02-14 | 上海华为技术有限公司 | Clock state detection method and device |
| US11832202B2 (en) | 2018-08-03 | 2023-11-28 | Huawei Technologies Co., Ltd. | Clock state detection method and apparatus |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 100080 Beijing, Haidian, North Street, No. two, No. 6, No. Patentee after: Putian Information Engineering Design Services Company Limited Address before: 100088 Beijing, Xicheng District new street, No. C, block, floor 4 Patentee before: Beijing Communication Planning & Design Institute of China Potevio Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20120307 |
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| CX01 | Expiry of patent term |