CN111511012A - GPS time signal delay compensation method and system - Google Patents
GPS time signal delay compensation method and system Download PDFInfo
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- CN111511012A CN111511012A CN202010222480.1A CN202010222480A CN111511012A CN 111511012 A CN111511012 A CN 111511012A CN 202010222480 A CN202010222480 A CN 202010222480A CN 111511012 A CN111511012 A CN 111511012A
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- 238000005259 measurement Methods 0.000 claims description 9
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W56/001—Synchronization between nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
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Abstract
The invention relates to a GPS time signal time delay compensation method and a system, wherein the method comprises the following steps: measuring the length of the GPS antenna and the length of the connecting line; respectively calculating the transmission delay of the GPS time signal in the GPS antenna and the transmission delay of the GPS time signal in the connecting line according to the measured length of the GPS antenna and the transmission speed of the GPS time signal in the GPS antenna and the measured length of the connecting line and the transmission speed of the GPS time signal in the connecting line; detecting a time delay for processing the GPS time signal; calculating the total time delay according to the transmission time delay of the GPS time signal in the GPS antenna, the transmission time delay in the connecting line and the time delay for processing the GPS time signal; and adjusting the starting point of the GPS time signal frame according to the total time delay, thereby realizing the clock synchronization of the base station equipment and the peripheral base stations. The invention can realize the clock synchronization of the base station equipment and the peripheral base stations.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of mobile communication, in particular to a GPS time signal delay compensation method and a system.
[ background of the invention ]
The GSP time signal is an important way for ensuring clock synchronization of the mobile communication base station, and there is a time delay when the GPS time signal is transmitted in the GPS antenna, the connection line and the base station device, and the transmission time delay may affect clock synchronization of the base station device and the peripheral base stations. The asynchronization can cause the phenomena of time delay interference, low switching success rate, large connection time delay and the like in the overlapping coverage area of the base station equipment and the peripheral base station, thereby influencing the experience and perception of the mobile user service.
[ summary of the invention ]
The present invention is directed to overcome the above-mentioned technical deficiencies, and to provide a GPS time signal delay compensation method and system, which can achieve clock synchronization between a base station device and a peripheral base station.
The first aspect of the present invention provides a GPS time signal delay compensation method, including the following steps:
measuring the length of the GPS antenna and the length of the connecting line;
respectively calculating the transmission delay of the GPS time signal in the GPS antenna and the transmission delay of the GPS time signal in the connecting line according to the measured length of the GPS antenna and the transmission speed of the GPS time signal in the GPS antenna and the measured length of the connecting line and the transmission speed of the GPS time signal in the connecting line;
detecting a time delay for processing the GPS time signal;
calculating the total time delay according to the transmission time delay of the GPS time signal in the GPS antenna, the transmission time delay in the connecting line and the time delay for processing the GPS time signal;
and adjusting the starting point of the GPS time signal frame according to the total time delay, thereby realizing the clock synchronization of the base station equipment and the peripheral base stations.
Further, the step of measuring the length of the GPS antenna and the length of the connection line includes:
sending a signal of the GPS measurement length to the GPS antenna and the connecting line;
and automatically measuring the length of the GPS antenna and the length of the connecting line after the signal of the GPS measured length passes through the GPS antenna and the connecting line back and forth.
Further, the transmission delay of the GPS time signal in the GPS antenna is a product of the length of the GPS antenna and the transmission speed of the GPS time signal in the GPS antenna.
Further, the transmission delay of the GPS time signal in the connection line is a product of the length of the connection line and the transmission speed of the GPS time signal in the connection line.
Further, the total time delay is the sum of the transmission time delay of the GPS time signal in the GPS antenna, the transmission time delay of the GPS time signal in the connection line, and the time delay for processing the GPS time signal.
The invention provides a GPS time signal delay compensation system, which comprises a GPS antenna, a connecting line and base station equipment which are connected in sequence, wherein the base station equipment comprises a measuring module, a first calculating module, a delay detecting module, a second calculating module and an adjusting module;
the measuring module is used for measuring the length of the GPS antenna and the length of the connecting line;
the first calculation module is used for respectively calculating the transmission delay of the GPS time signal in the GPS antenna and the transmission delay of the GPS time signal in the connecting line according to the measured length of the GPS antenna and the transmission speed of the GPS time signal in the GPS antenna and the measured length of the connecting line and the transmission speed of the GPS time signal in the connecting line;
the time delay detection module is used for detecting the time delay of processing the GPS time signal;
the second calculation module is used for calculating the total time delay according to the transmission time delay of the GPS time signal in the GPS antenna, the transmission time delay in the connecting line and the time delay for processing the GPS time signal;
the adjusting module is used for adjusting the starting point of the GPS time signal frame according to the total time delay, so that clock synchronization of the base station equipment and the peripheral base stations is realized.
Furthermore, the measuring module comprises a sending unit and an automatic measuring and calculating unit, wherein the sending unit is used for sending signals of the GPS measuring length to the GPS antenna and the connecting line, and the automatic measuring and calculating unit is used for automatically measuring and calculating the length of the GPS antenna and the length of the connecting line after the signals of the GPS measuring length pass through the GPS antenna and the connecting line back and forth.
Further, the transmission delay of the GPS time signal in the GPS antenna is a product of the length of the GPS antenna and the transmission speed of the GPS time signal in the GPS antenna.
Further, the transmission delay of the GPS time signal in the connection line is a product of the length of the connection line and the transmission speed of the GPS time signal in the connection line.
Further, the total time delay is the sum of the transmission time delay of the GPS time signal in the GPS antenna, the transmission time delay of the GPS time signal in the connection line, and the time delay for processing the GPS time signal.
The invention can realize the clock synchronization of the base station equipment and the peripheral base stations, so that the overlapping coverage area of the base station equipment and the peripheral base stations does not have the phenomena of time delay interference, low switching success rate, large connection time delay and the like, and the mobile user service has better experience and perception.
[ description of the drawings ]
Fig. 1 is a block diagram illustrating a GPS time signal delay compensation system according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a GPS time signal delay compensation method provided based on the system shown in fig. 1.
[ detailed description ] embodiments
The invention is further described below with reference to the figures and examples.
Referring to fig. 1, the GPS time signal delay compensation system provided by the present invention includes a GPS antenna 10, a connection line 20, and a base station device 30, which are connected in sequence. The GPS time signal sequentially enters the base station device 30 through the GPS antenna 10 and the connection line 20 and is processed by the GPS module of the base station device 30.
The base station device 30 includes a measurement module 31, a first calculation module 32, a delay detection module 33, a second calculation module 34, and an adjustment module 35.
The measuring module 31 is used for measuring the length L1 of the GPS antenna 10 and the length L2 of the connecting line 20. preferably, the measuring module 31 comprises a transmitting unit 311 and an automatic measuring and calculating unit 312. the transmitting unit 311 is used for transmitting signals of the GPS measured length to the GPS antenna 10 and the connecting line 20, the automatic measuring and calculating unit 312 is used for automatically measuring and calculating the length L1 of the GPS antenna 10 and the length L of the connecting line 20 after the signals of the GPS measured length pass through the GPS antenna 10 and the connecting line 20 one round trip, the signals of the GPS measured length are sent from the transmitting unit 311, reach the GPS antenna 10 through the connecting line 20, then reach the connecting line 20 through the GPS antenna 10, and finally return to the transmitting unit 311.
The first calculating module 32 is configured to calculate a transmission delay Δ t1 of the GPS time signal in the GPS antenna 10 and a transmission delay Δ t2 in the connection line 20 according to the measured length L1 of the GPS antenna 10 and the transmission speed V1 of the GPS time signal in the GPS antenna 10, and calculate a transmission speed V1 of the GPS time signal in the GPS antenna 10 and a transmission speed V2 of the GPS time signal in the connection line 20, respectively, according to the measured length L2 of the connection line 20 and the transmission speed V2 of the GPS time signal in the connection line 20.
The delay detection module 33 is used to detect the delay Δ t3 of the processing of the GPS time signal.
The second calculating module 34 is configured to calculate the total time delay Δ t according to the transmission time delay Δ t1 of the GPS time signal in the GPS antenna 10, the transmission time delay Δ t2 in the connection line 20, and the time delay Δ t3 of the processed GPS time signal.
The adjusting module 35 is configured to adjust the starting point of the GPS time signal frame according to the total time delay Δ t, so as to implement clock synchronization between the base station device 30 and the peripheral base station, and thus, the overlapping coverage area between the base station device 30 and the peripheral base station does not have the phenomena of time delay interference, low handover success rate, large connection time delay, and the like, so that the mobile user service has better experience and perception.
The delay detection module 33 is typically integrated into the GPS module.
The transmission delay Δ t1 of the GPS time signal in the GPS antenna 10 is the product of the length L1 of the GPS antenna 10 and the transmission speed V1 of the GPS time signal in the GPS antenna 10, such as Δ t1 ═ L1 × V1.
The propagation delay Δ t2 of the GPS time signal in the connection line 20 is a product of the length L2 of the connection line 20 and the propagation speed V2 of the GPS time signal in the connection line 20, such as Δ t2 ═ L2 × V2.
The total time delay Δ t is the sum of the transmission time delay Δ t1 of the GPS time signal in the GPS antenna 10, the transmission time delay Δ t2 of the GPS time signal in the connection line 20, and the time delay Δ t3 for processing the GPS time signal, for example, Δ t1+ Δ t2+ Δ t 3.
Referring to fig. 2, the present invention provides a GPS time signal delay compensation method, including the following steps:
s1, measure the length L1 of the GPS antenna 10 and the length L2 of the connecting wire 20.
S2, calculating the transmission time delay Deltat 1 of the GPS time signal in the GPS antenna 10 and the transmission time delay Deltat 2 in the connecting line 20 respectively according to the measured length L1 of the GPS antenna 10 and the transmission speed V1 of the GPS time signal in the GPS antenna 10 and the measured length L2 of the connecting line 20 and the transmission speed V2 of the GPS time signal in the connecting line 20, wherein the transmission speed V1 of the GPS time signal in the GPS antenna 10 and the transmission speed V2 of the GPS time signal in the connecting line 20 are preset.
And S3, detecting and processing the time delay delta t3 of the GPS time signal.
S4, calculating the total time delay delta t according to the transmission time delay delta t1 of the GPS time signal in the GPS antenna 10, the transmission time delay delta t2 in the connecting line 20 and the time delay delta t3 for processing the GPS time signal.
And S5, adjusting the starting point of the GPS time signal frame according to the total time delay delta t, thereby realizing the clock synchronization of the base station equipment 30 and the peripheral base stations.
In this embodiment, the transmission delay Δ t1 of the GPS time signal in the GPS antenna 10 is a product of the length L1 of the GPS antenna 10 and the transmission speed V1 of the GPS time signal in the GPS antenna 10, for example, Δ t1 — L1 × V1.
The propagation delay Δ t2 of the GPS time signal in the connection line 20 is a product of the length L2 of the connection line 20 and the propagation speed V2 of the GPS time signal in the connection line 20, such as Δ t2 ═ L2 × V2.
The total time delay Δ t is the sum of the transmission time delay Δ t1 of the GPS time signal in the GPS antenna 10, the transmission time delay Δ t2 of the GPS time signal in the connection line 20, and the time delay Δ t3 for processing the GPS time signal, for example, Δ t1+ Δ t2+ Δ t 3.
In this embodiment, the step of measuring the length L1 of the GPS antenna 10 and the length L2 of the connection line 20 includes:
sending a signal of the GPS measurement length to the GPS antenna 10 and the connecting line 20;
after the signals with the GPS measurement length pass through the GPS antenna 10 and the connecting line 20, the length L1 of the GPS antenna 10 and the length L of the connecting line 20 are automatically measured, and the signals with the GPS measurement length reach the GPS antenna 10 through the connecting line 20 and then reach the connecting line 20 through the GPS antenna 10.
The compensation method of the invention can realize the clock synchronization of the base station equipment 30 and the peripheral base stations, so that the overlapping coverage area of the base station equipment 30 and the peripheral base stations can not have the phenomena of time delay interference, low switching success rate, large connection time delay and the like, and the mobile user service has better experience and perception.
The above examples merely represent preferred embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications, such as combinations of different features in various embodiments, may be made without departing from the spirit of the invention, and these are within the scope of the invention.
Claims (10)
1. A GPS time signal delay compensation method is characterized by comprising the following steps:
measuring the length of the GPS antenna and the length of the connecting line;
respectively calculating the transmission delay of the GPS time signal in the GPS antenna and the transmission delay of the GPS time signal in the connecting line according to the measured length of the GPS antenna and the transmission speed of the GPS time signal in the GPS antenna and the measured length of the connecting line and the transmission speed of the GPS time signal in the connecting line;
detecting a time delay for processing the GPS time signal;
calculating the total time delay according to the transmission time delay of the GPS time signal in the GPS antenna, the transmission time delay in the connecting line and the time delay for processing the GPS time signal;
and adjusting the starting point of the GPS time signal frame according to the total time delay, thereby realizing the clock synchronization of the base station equipment and the peripheral base stations.
2. The GPS time signal delay compensation method of claim 1, wherein the step of measuring the length of the GPS antenna and the length of the connection line comprises:
sending a signal of the GPS measurement length to the GPS antenna and the connecting line;
and automatically measuring the length of the GPS antenna and the length of the connecting line after the signal of the GPS measured length passes through the GPS antenna and the connecting line back and forth.
3. The GPS time signal delay compensation method of claim 1, wherein the transmission delay of the GPS time signal in the GPS antenna is a product of a length of the GPS antenna and a transmission speed of the GPS time signal in the GPS antenna.
4. The GPS time signal delay compensation method of claim 1, wherein the transmission delay of the GPS time signal in the connection line is a product of a length of the connection line and a transmission speed of the GPS time signal in the connection line.
5. The GPS time signal delay compensation method of claim 1, wherein the total delay is a sum of a transmission delay of the GPS time signal in the GPS antenna, a transmission delay of the GPS time signal in the connection line, and a delay of processing the GPS time signal.
6. A GPS time signal delay compensation system comprises a GPS antenna, a connecting line and base station equipment which are connected in sequence, and is characterized in that the base station equipment comprises a measuring module, a first calculating module, a delay detecting module, a second calculating module and an adjusting module;
the measuring module is used for measuring the length of the GPS antenna and the length of the connecting line;
the first calculation module is used for respectively calculating the transmission delay of the GPS time signal in the GPS antenna and the transmission delay of the GPS time signal in the connecting line according to the measured length of the GPS antenna and the transmission speed of the GPS time signal in the GPS antenna and the measured length of the connecting line and the transmission speed of the GPS time signal in the connecting line;
the time delay detection module is used for detecting the time delay of processing the GPS time signal;
the second calculation module is used for calculating the total time delay according to the transmission time delay of the GPS time signal in the GPS antenna, the transmission time delay in the connecting line and the time delay for processing the GPS time signal;
the adjusting module is used for adjusting the starting point of the GPS time signal frame according to the total time delay, so that clock synchronization of the base station equipment and the peripheral base stations is realized.
7. The GPS time signal delay compensation system according to claim 6, wherein the measurement module includes a transmitting unit for transmitting a GPS measurement length signal to the GPS antenna and the connection line, and an automatic calculating unit for automatically calculating the length of the GPS antenna and the length of the connection line after the GPS measurement length signal passes through the GPS antenna and the connection line one round trip.
8. The GPS time signal delay compensation system of claim 6, wherein the transmission delay of the GPS time signal in the GPS antenna is a product of a length of the GPS antenna and a transmission speed of the GPS time signal in the GPS antenna.
9. The GPS time signal delay compensation system of claim 6, wherein the propagation delay of the GPS time signal through the connection line is a product of the length of the connection line and the propagation speed of the GPS time signal through the connection line.
10. The GPS time signal delay compensation system of claim 6, wherein the total delay is a sum of a transmission delay of the GPS time signal in the GPS antenna, a transmission delay of the GPS time signal in the connection line, and a delay of processing the GPS time signal.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113660717A (en) * | 2021-07-07 | 2021-11-16 | 北京高信达通信科技股份有限公司 | Time delay compensation method and system for GPS (global positioning system) synchronization signal of 5G small base station |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101702826A (en) * | 2009-10-20 | 2010-05-05 | 武汉虹信通信技术有限责任公司 | TD-SCDMA RRU cascaded optical fiber time-delay compensation device and method |
| CN102082608A (en) * | 2010-12-27 | 2011-06-01 | 武汉邮电科学研究院 | Method and device for adjusting time delay of RRU (remote radio unit) cascaded fiber |
| CN102369771A (en) * | 2009-04-01 | 2012-03-07 | 瑞典爱立信有限公司 | Method and arrangement for base station synchronisation |
| US20130100882A1 (en) * | 2011-10-25 | 2013-04-25 | Telefonaktiebolaget L M Ericsson (Publ) | Delay compensation during synchronization in a base station in a cellular communication network |
| CN103472463A (en) * | 2013-10-03 | 2013-12-25 | 中国电子科技集团公司第五十四研究所 | Delay calibration method of satellite navigation receiving set |
| 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 |
| CN109660281A (en) * | 2017-10-11 | 2019-04-19 | 上海矽久微电子有限公司 | Distance measuring method and device between a kind of communication node based on wire transmission media |
| CN109699071A (en) * | 2019-03-18 | 2019-04-30 | 辰芯科技有限公司 | Method for synchronizing time, system and the readable storage medium storing program for executing of self-organized network communication system |
-
2020
- 2020-03-26 CN CN202010222480.1A patent/CN111511012A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102369771A (en) * | 2009-04-01 | 2012-03-07 | 瑞典爱立信有限公司 | Method and arrangement for base station synchronisation |
| CN101702826A (en) * | 2009-10-20 | 2010-05-05 | 武汉虹信通信技术有限责任公司 | TD-SCDMA RRU cascaded optical fiber time-delay compensation device and method |
| CN102082608A (en) * | 2010-12-27 | 2011-06-01 | 武汉邮电科学研究院 | Method and device for adjusting time delay of RRU (remote radio unit) cascaded fiber |
| US20130100882A1 (en) * | 2011-10-25 | 2013-04-25 | Telefonaktiebolaget L M Ericsson (Publ) | Delay compensation during synchronization in a base station in a cellular communication network |
| CN103472463A (en) * | 2013-10-03 | 2013-12-25 | 中国电子科技集团公司第五十四研究所 | Delay calibration method of satellite navigation receiving set |
| 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 |
| CN109660281A (en) * | 2017-10-11 | 2019-04-19 | 上海矽久微电子有限公司 | Distance measuring method and device between a kind of communication node based on wire transmission media |
| CN109699071A (en) * | 2019-03-18 | 2019-04-30 | 辰芯科技有限公司 | Method for synchronizing time, system and the readable storage medium storing program for executing of self-organized network communication system |
Non-Patent Citations (1)
| Title |
|---|
| 周渭等: "《时频测控技术》", 31 July 2006, 西安电子科技大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113660717A (en) * | 2021-07-07 | 2021-11-16 | 北京高信达通信科技股份有限公司 | Time delay compensation method and system for GPS (global positioning system) synchronization signal of 5G small base station |
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