CN114828202A - Method and system for base station air interface synchronization alignment - Google Patents
Method and system for base station air interface synchronization alignment Download PDFInfo
- Publication number
- CN114828202A CN114828202A CN202210763961.2A CN202210763961A CN114828202A CN 114828202 A CN114828202 A CN 114828202A CN 202210763961 A CN202210763961 A CN 202210763961A CN 114828202 A CN114828202 A CN 114828202A
- Authority
- CN
- China
- Prior art keywords
- time delay
- delay
- baseband processing
- base station
- processing unit
- 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.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
- H04W56/0065—Synchronisation arrangements determining timing error of reception due to propagation delay using measurement of signal travel time
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention relates to a method and a system for air interface synchronization alignment of a base station, wherein the method comprises the following steps: detecting the time delay from the GPS antenna to the baseband processing unit to obtain a first time delay; detecting the time delay from the baseband processing unit to the radio remote unit to obtain a second time delay; detecting the time delay from the radio remote unit to a network coverage antenna to obtain a third time delay; calculating to obtain a total time delay offset value to be adjusted by the base station according to the first time delay, the second time delay and the third time delay; and adjusting the starting time point of the radio frequency signal frame of the radio frequency remote unit according to the total time delay offset value which needs to be adjusted by the base station, thereby realizing the air interface synchronization alignment of the base station. The invention makes the frame starting time of the antenna port of the radio remote unit of each base station be adjusted consistently; and synchronously aligning the uplink time slot and the downlink time slot of each base station, and realizing the synchronous alignment of the air interfaces of each base station of the mobile network system.
Description
Technical Field
The present invention relates to the field of mobile communications, and in particular, to a method and system for base station air interface synchronization alignment.
Background
In a mobile communication network, mobile service activities are performed through the interfacing of air interfaces (air interfaces for short). When the base station carries out mobile service activities, uplink and downlink time slots of each base station must be aligned synchronously, otherwise, uplink signals and downlink signals between the base stations interfere with each other, so that indexes such as call completing rate, switching success rate, call completing time delay and speed of mobile services of the base stations are influenced, and experience perception of mobile user services is reduced. The main reason for making the uplink and downlink time slots between the base stations unsynchronized is the time delay of the air interface of the base station; for example: there is time delay in the uplink and downlink time slots of the radio frequency antenna port of the base station.
The uplink and downlink time slots of the base stations are synchronously aligned in a mode of receiving Beidou or GPS signals, so that all the base stations are synchronous. However, due to different environments, the base stations have differences in feeder line length, signal transmission and the like between cables for connecting GPS signals, the base band processing unit to the remote radio unit, and the remote radio unit to the radio antenna port of the base station; resulting in different delays for each base station. Therefore, a solution is needed.
Disclosure of Invention
The present invention aims to overcome the defects of the above technologies, and provides a method and a system for base station air interface synchronization alignment, which adjust the antenna ports of the radio remote units of each base station to achieve air interface synchronization alignment of the base stations.
A first aspect of the present invention provides a method for base station air interface synchronization alignment, including the following steps:
detecting the time delay from a GPS antenna to a baseband processing unit, and obtaining the GPS signal transmission time delay from the GPS antenna to the baseband processing unit as a first time delay;
detecting the time delay from the baseband processing unit to the radio remote unit, and obtaining the time delay of optical fiber signal transmission between the baseband processing unit and the radio remote unit as a second time delay;
detecting the time delay from the radio remote unit to the network coverage antenna, and obtaining the time delay of radio frequency signal transmission between the radio remote unit and the network coverage antenna as a third time delay;
calculating to obtain a total time delay offset value to be adjusted by the base station according to the first time delay, the second time delay and the third time delay;
and adjusting the starting time point of the radio frequency signal frame of the radio frequency remote unit according to the total time delay offset value which needs to be adjusted by the base station, thereby realizing the air interface synchronization alignment of the base station.
As a preferred technical scheme, the baseband processing unit and the radio remote unit are both provided with a time delay detection module; the baseband processing unit obtains the first time delay through a time delay detection module; and the radio remote unit acquires the third time delay through a time delay detection module and transmits the third time delay to the baseband processing unit.
As a preferred technical solution, the step of acquiring the second time delay includes: and the baseband processing unit sends a pulse signal to the radio frequency remote unit, and the second time delay is obtained by detecting the time delay between the receiving and sending of the pulse signal.
As a preferred technical solution, after obtaining a first time delay, a second time delay, and a third time delay transmitted by the radio remote unit, the baseband processing unit adds and sums the first time delay, the second time delay, and the third time delay, and calculates to obtain a total time delay offset value that needs to be adjusted by the base station.
As a preferred technical solution, the baseband processing unit controls a radio remote unit to advance a starting time point of a radio frequency signal frame of the radio remote unit; and the forward value of the starting time point of the radio frequency signal frame of the radio remote unit is the total time delay offset value which needs to be adjusted by the base station.
The second aspect of the present invention provides a system for aligning air interfaces of base stations, which includes a GPS antenna, a baseband processing unit, a radio remote unit, and a network coverage antenna, which are connected in sequence; the baseband processing unit comprises a first time delay detection module, a pulse signal transmitting module, a calculation module and a control module; the radio remote unit comprises a second time delay detection module and a pulse signal receiving module; the first time delay detection module is used for detecting the time delay from the GPS antenna to the baseband processing unit and obtaining the GPS signal transmission time delay from the GPS antenna to the baseband processing unit as a first time delay;
the pulse signal transmitting module is combined with the pulse signal receiving module and used for detecting the time delay from the baseband processing unit to the radio remote unit and obtaining the time delay of optical fiber signal transmission between the baseband processing unit and the radio remote unit as a second time delay;
the second time delay detection module is configured to detect a time delay from the radio remote unit to the network coverage antenna, and obtain a third time delay as a time delay of radio frequency signal transmission between the radio remote unit and the network coverage antenna;
the calculation module is used for calculating a total time delay offset value to be adjusted of the base station according to the first time delay, the second time delay and the third time delay;
the control module is used for adjusting the starting time point of the radio frequency signal frame of the radio frequency remote unit according to the total time delay offset value which needs to be adjusted by the base station, thereby realizing the air interface synchronization alignment of the base station.
As a preferred technical solution, the radio remote unit further includes an information sending module, and the baseband processing unit further includes an information receiving module; the information sending module is used for transmitting the third time delay to the baseband processing unit; the information receiving module is used for receiving the third time delay transmitted by the information sending module.
As a preferred technical solution, the pulse signal transmitting module is configured to transmit a pulse signal to the remote radio unit; the baseband processing unit further comprises a pulse delay measuring module, wherein the pulse delay measuring module is used for detecting the time delay between the receiving and sending of the pulse signal according to the pulse signal sent by the pulse signal sending module and the pulse signal received by the pulse signal receiving module, so as to obtain the second time delay.
As a preferred technical solution, the calculating module is configured to sum the first time delay, the second time delay, and the third time delay, and calculate a total offset value of the time delay that needs to be adjusted by the base station.
As a preferred technical solution, the control module is configured to control a radio remote unit, and advance a starting time point of a radio signal frame of the radio remote unit; and the forward value of the starting time point of the radio frequency signal frame of the radio frequency remote unit is the total time delay offset value which needs to be adjusted by the base station.
The invention is implemented to lead the frame starting time of the antenna port of the radio remote unit of each base station to be adjusted consistently; and synchronously aligning the uplink time slot and the downlink time slot of each base station, and realizing the synchronous alignment of the air interfaces of each base station of the mobile network system.
Drawings
Fig. 1 is a schematic diagram of a frame of a system for aligning air interfaces of base stations according to an embodiment of the present invention;
FIG. 2 is a block diagram of a baseband processing unit of the system of FIG. 1;
fig. 3 is a schematic diagram of a frame of a remote radio unit of the system of fig. 1;
fig. 4 is a flowchart of a method for aligning base station air interfaces according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the figures and examples.
Referring to fig. 1, the system for aligning air interfaces of base stations according to the present invention includes a GPS antenna, a baseband processing unit 10, a radio remote unit 30, and a network coverage antenna, which are connected in sequence. The GPS signal enters the baseband processing unit 10 through the GPS antenna; the baseband processing unit 10 and the radio remote unit 30 perform fiber remote transmission through fiber signals; the radio remote unit 30 is connected to the network coverage antenna via a radio frequency line for transmission. Time delays are generated in the transmission among the GPS antenna, the optical fiber remote and the radio frequency line.
In this embodiment, the GPS signal transmission delay from the GPS antenna to the baseband processing unit 10 is a first delay; the time delay of the optical fiber signal transmission between the baseband processing unit 10 and the radio remote unit 30 is a second time delay; the delay of the rf signal transmission from the remote rf unit 30 to the network coverage antenna is the third delay.
Referring to fig. 2 and 3, the baseband processing unit 10 includes a first delay detecting module 11, a pulse signal transmitting module 13, a calculating module 15, and a control module 16. The remote radio unit 30 includes a second delay detection module 31 and a pulse signal receiving module 33.
Wherein the content of the first and second substances,
the first delay detection module 11 is configured to detect a delay from the GPS antenna to the baseband processing unit 10, and obtain a first delay.
The pulse signal transmitting module 13 is combined with the pulse signal receiving module 33, and is configured to detect a time delay from the baseband processing unit 10 to the remote radio unit 30, so as to obtain a second time delay. Specifically, the pulse signal transmitting module 13 is configured to transmit a pulse signal to the remote radio unit 30. The pulse signal receiving module 33 is configured to receive the pulse signal sent by the pulse signal transmitting module 13. Further, the baseband processing unit 10 further includes a pulse delay measuring module 19, where the pulse delay measuring module 19 is configured to send a pulse signal to the pulse signal receiving module 33 according to the pulse signal sending module 13 and receive the pulse signal, so as to detect a time delay of receiving and sending the pulse signal and obtain the second time delay.
The second delay detection module 31 is configured to detect a delay from the radio remote unit 30 to the network coverage antenna, and obtain a third delay. Further, the remote radio unit 30 further includes an information sending module 35; the baseband processing unit 10 further includes an information receiving module 18. The information sending module 35 is configured to transmit the third delay to the baseband processing unit 10; the message receiving module 18 is used for receiving the third time delay transferred by the message sending module 35.
The calculating module 15 is configured to calculate a total delay offset value that needs to be adjusted by the base station according to the first delay, the second delay, and the third delay. Specifically, the calculating module 15 is configured to sum the first time delay, the second time delay, and the third time delay, and calculate a total offset value of the time delay that needs to be adjusted by the base station.
The control module 16 is configured to adjust a starting time point of a radio frequency signal frame of the radio remote unit 30 according to a total delay offset value that needs to be adjusted by the base station, so as to implement air interface synchronization alignment of the base station. Specifically, the control module 16 is configured to control the remote radio unit 30, and advance a starting time point of a radio frequency signal frame of the remote radio unit 30; the forward value of the starting time point of the rf signal frame of the remote rf unit 30 is the total delay offset value that needs to be adjusted by the base station. Thus, the frame start time of the antenna port of the remote radio unit 30 of each base station is adjusted to be consistent; after the antenna port of the radio remote unit of each base station is adjusted, the air interface synchronization alignment of each base station of the mobile network system is realized; and the interference caused by the dislocation of the uplink time slot and the downlink time slot of the wireless signals of each base station is avoided.
Referring to fig. 4, a method for base station air interface synchronization alignment provided by the present invention includes the following steps:
s1, detecting the time delay from the GPS antenna to the baseband processing unit 10, and obtaining the GPS signal transmission time delay from the GPS antenna to the baseband processing unit 10 as a first time delay.
S2, detecting the time delay from the baseband processing unit 10 to the remote rf unit 30, and obtaining the time delay of the optical fiber signal transmission between the baseband processing unit 10 and the remote rf unit 30 as a second time delay.
S3, detecting a time delay from the remote radio unit 30 to the network coverage antenna, and obtaining a time delay of radio signal transmission between the remote radio unit 30 and the network coverage antenna as a third time delay.
And S4, calculating to obtain the total time delay offset value which needs to be adjusted by the base station according to the first time delay, the second time delay and the third time delay.
S5, adjusting the starting time point of the radio frequency signal frame of the radio frequency remote unit 30 according to the total delay offset value that needs to be adjusted by the base station, thereby implementing air interface synchronization alignment of the base station.
It is understood that the above steps S1, S2 and S3 are not in sequence. Step S4 follows steps S1, S2, and S3; step S5 follows step S4.
Specifically, the GPS signal transmission delay from the GPS antenna to the baseband processing unit 10 is a first delay; the time delay of the optical fiber signal transmission between the baseband processing unit 10 and the radio remote unit 30 is a second time delay; the delay of the rf signal transmission from the remote rf unit 30 to the network coverage antenna is the third delay. The total delay offset value to be adjusted by the base station is the sum of the GPS signal transmission delay from the GPS antenna to the baseband processing unit 10, the delay of the optical fiber signal transmission from the baseband processing unit 10 to the radio remote unit 30, and the three-stage delay of the radio frequency signal transmission from the radio remote unit 30 to the network coverage antenna. Namely, the total offset value of the time delay which needs to be adjusted by the base station = the first time delay + the second time delay + the third time delay.
In this embodiment, the baseband processing unit 10 and the radio remote unit 30 are both provided with a time delay detection module; the baseband processing unit 10 obtains the first delay through the delay detection module. The remote radio unit 30 obtains the third time delay through the time delay detection module, and transmits the third time delay to the baseband processing unit 10.
Specifically, the step of acquiring the second time delay includes: the baseband processing unit 10 sends the pulse signal to the remote radio unit 30, and obtains the second time delay by detecting the time delay between the sending and receiving of the pulse signal.
In this embodiment, after obtaining the first time delay, the second time delay, and the third time delay transmitted by the radio remote unit 30, the baseband processing unit 10 adds and sums the first time delay, the second time delay, and the third time delay, and calculates to obtain a total time delay offset value that needs to be adjusted by the base station.
Further, the baseband processing unit 10 controls the remote radio unit 30 to advance a starting time point of a radio frequency signal frame of the remote radio unit 30. The forward value of the starting time point of the rf signal frame of the remote rf unit 30 is the total delay offset value that needs to be adjusted by the base station.
The base station air interface synchronous alignment method of the invention enables the frame starting time of the antenna port of the radio remote unit 30 of each base station to be adjusted consistently; the uplink time slot and the downlink time slot of each base station are aligned synchronously, and the air interface of each base station of the mobile network system is aligned synchronously; the interference between uplink signals and downlink signals between base stations is avoided, the interference caused by the dislocation of uplink time slots and downlink time slots of wireless signals of each base station is avoided, the indexes of the mobile service of the base stations, such as call completing rate, switching success rate, call completing time delay, speed and the like, are stable, 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 method for base station air interface synchronization alignment is characterized by comprising the following steps:
detecting the time delay from a GPS antenna to a baseband processing unit, and obtaining the GPS signal transmission time delay from the GPS antenna to the baseband processing unit as a first time delay;
detecting the time delay from the baseband processing unit to the radio remote unit, and obtaining the time delay of optical fiber signal transmission between the baseband processing unit and the radio remote unit as a second time delay;
detecting the time delay from the radio remote unit to the network coverage antenna, and obtaining the time delay of radio frequency signal transmission between the radio remote unit and the network coverage antenna as a third time delay;
calculating to obtain a total time delay offset value which needs to be adjusted by the base station according to the first time delay, the second time delay and the third time delay;
and adjusting the starting time point of the radio frequency signal frame of the radio frequency remote unit according to the total time delay offset value which needs to be adjusted by the base station, thereby realizing the air interface synchronization alignment of the base station.
2. The method according to claim 1, wherein the baseband processing unit and the radio remote unit are both provided with a delay detection module; the baseband processing unit obtains the first time delay through a time delay detection module; and the radio remote unit obtains the third time delay through a time delay detection module and transmits the third time delay to the baseband processing unit.
3. The method according to claim 2, wherein the step of acquiring the second delay includes: and the baseband processing unit sends a pulse signal to the radio frequency remote unit, and the second time delay is obtained by detecting the time delay between the receiving and sending of the pulse signal.
4. The method according to claim 3, wherein the baseband processing unit obtains a first delay, a second delay, and a third delay transmitted by the radio remote unit, and adds and sums the first delay, the second delay, and the third delay to calculate a total delay offset value that the base station needs to adjust.
5. The method according to claim 1, wherein the baseband processing unit controls a radio remote unit to advance a starting time point of a radio signal frame of the radio remote unit; and the forward value of the starting time point of the radio frequency signal frame of the radio remote unit is the total time delay offset value which needs to be adjusted by the base station.
6. A system for aligning air interfaces of base stations comprises a GPS antenna, a baseband processing unit, a radio remote unit and a network coverage antenna which are connected in sequence; the baseband processing unit comprises a first time delay detection module, a pulse signal transmitting module, a calculation module and a control module; the radio remote unit comprises a second time delay detection module and a pulse signal receiving module; the first time delay detection module is used for detecting the time delay from the GPS antenna to the baseband processing unit and obtaining the GPS signal transmission time delay from the GPS antenna to the baseband processing unit as a first time delay;
the pulse signal transmitting module is combined with the pulse signal receiving module and used for detecting the time delay from the baseband processing unit to the radio remote unit and obtaining the time delay of optical fiber signal transmission between the baseband processing unit and the radio remote unit as a second time delay;
the second time delay detection module is configured to detect a time delay from the radio remote unit to the network coverage antenna, and obtain a third time delay as a time delay of radio frequency signal transmission between the radio remote unit and the network coverage antenna;
the calculation module is used for calculating a total time delay offset value to be adjusted of the base station according to the first time delay, the second time delay and the third time delay;
the control module is used for adjusting the starting time point of the radio frequency signal frame of the radio frequency remote unit according to the total time delay offset value which needs to be adjusted by the base station, thereby realizing the air interface synchronization alignment of the base station.
7. The system according to claim 6, wherein said remote radio unit further comprises an information sending module, and said baseband processing unit further comprises an information receiving module; the information sending module is used for transmitting the third time delay to the baseband processing unit; the information receiving module is used for receiving the third time delay transmitted by the information sending module.
8. The system according to claim 7, wherein said burst signal transmitting module is configured to transmit a burst signal to a remote radio unit; the baseband processing unit further comprises a pulse delay measuring module, wherein the pulse delay measuring module is used for detecting the time delay between the receiving and sending of the pulse signal according to the pulse signal sent by the pulse signal sending module and the pulse signal received by the pulse signal receiving module, so as to obtain the second time delay.
9. The system according to claim 8, wherein the calculating module is configured to sum the first delay, the second delay, and the third delay, and calculate a total delay offset value that needs to be adjusted by the base station.
10. The system according to claim 8, wherein said control module is configured to control a radio remote unit, and to advance a starting time point of a radio signal frame of the radio remote unit; and the forward value of the starting time point of the radio frequency signal frame of the radio remote unit is the total time delay offset value which needs to be adjusted by the base station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210763961.2A CN114828202A (en) | 2022-07-01 | 2022-07-01 | Method and system for base station air interface synchronization alignment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210763961.2A CN114828202A (en) | 2022-07-01 | 2022-07-01 | Method and system for base station air interface synchronization alignment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114828202A true CN114828202A (en) | 2022-07-29 |
Family
ID=82522607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210763961.2A Pending CN114828202A (en) | 2022-07-01 | 2022-07-01 | Method and system for base station air interface synchronization alignment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114828202A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101291168A (en) * | 2008-05-28 | 2008-10-22 | 京信通信***（中国）有限公司 | Coverage reinforcing system based on radio remote unit and method thereof |
| CN104185193A (en) * | 2014-08-18 | 2014-12-03 | 京信通信***（中国）有限公司 | Multi-channel RRU delay control method and device |
| KR20150057281A (en) * | 2013-11-19 | 2015-05-28 | 주식회사 쏠리드 | Time synchronization method and system between communication units |
| CN105682214A (en) * | 2014-11-21 | 2016-06-15 | 中兴通讯股份有限公司 | Baseband and radio frequency combined time sequence adjustment method and device |
| US20180007736A1 (en) * | 2015-01-13 | 2018-01-04 | Aalto-Korkeakoulusaatio | A base station and a method thereto |
| US20180368091A1 (en) * | 2015-05-17 | 2018-12-20 | Kiomars Anvari | Wireless radio access networks with asynchronous frontend |
| CN110213797A (en) * | 2019-05-29 | 2019-09-06 | 鼎桥通信技术有限公司 | Processing method, device, equipment and the storage medium for signal alignment of eating dishes without rice or wine |
| CN111162862A (en) * | 2019-12-31 | 2020-05-15 | 京信通信***（中国）有限公司 | Distributed multi-network element clock transmission system |
| CN111510218A (en) * | 2020-03-30 | 2020-08-07 | 深圳国人无线通信有限公司 | 5G wireless network communication system |
| 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 |
| CN114125934A (en) * | 2021-11-10 | 2022-03-01 | 新华三技术有限公司成都分公司 | Time delay compensation method and device and electronic equipment |
| CN114339980A (en) * | 2021-12-16 | 2022-04-12 | 广州慧睿思通科技股份有限公司 | Method, device, unit, equipment and storage medium for synchronizing downlink data |
| CN114466444A (en) * | 2021-12-31 | 2022-05-10 | 华为技术有限公司 | Clock synchronization method, device and system |
-
2022
- 2022-07-01 CN CN202210763961.2A patent/CN114828202A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101291168A (en) * | 2008-05-28 | 2008-10-22 | 京信通信***（中国）有限公司 | Coverage reinforcing system based on radio remote unit and method thereof |
| KR20150057281A (en) * | 2013-11-19 | 2015-05-28 | 주식회사 쏠리드 | Time synchronization method and system between communication units |
| CN104185193A (en) * | 2014-08-18 | 2014-12-03 | 京信通信***（中国）有限公司 | Multi-channel RRU delay control method and device |
| CN105682214A (en) * | 2014-11-21 | 2016-06-15 | 中兴通讯股份有限公司 | Baseband and radio frequency combined time sequence adjustment method and device |
| US20180007736A1 (en) * | 2015-01-13 | 2018-01-04 | Aalto-Korkeakoulusaatio | A base station and a method thereto |
| US20180368091A1 (en) * | 2015-05-17 | 2018-12-20 | Kiomars Anvari | Wireless radio access networks with asynchronous frontend |
| CN110213797A (en) * | 2019-05-29 | 2019-09-06 | 鼎桥通信技术有限公司 | Processing method, device, equipment and the storage medium for signal alignment of eating dishes without rice or wine |
| CN111162862A (en) * | 2019-12-31 | 2020-05-15 | 京信通信***（中国）有限公司 | Distributed multi-network element clock transmission system |
| CN111510218A (en) * | 2020-03-30 | 2020-08-07 | 深圳国人无线通信有限公司 | 5G wireless network communication system |
| 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 |
| CN114125934A (en) * | 2021-11-10 | 2022-03-01 | 新华三技术有限公司成都分公司 | Time delay compensation method and device and electronic equipment |
| CN114339980A (en) * | 2021-12-16 | 2022-04-12 | 广州慧睿思通科技股份有限公司 | Method, device, unit, equipment and storage medium for synchronizing downlink data |
| CN114466444A (en) * | 2021-12-31 | 2022-05-10 | 华为技术有限公司 | Clock synchronization method, device and system |
Non-Patent Citations (1)
| Title |
|---|
| 宗春: "5G网络C-RAN机房时钟同步解决方案初探", 《江苏通信》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6347228B1 (en) | Location apparatus and method in a mobile telecommunications system | |
| US7961689B2 (en) | Method and apparatus for determining an end of a subframe in a TDD system | |
| EP1201050B1 (en) | Method and apparatus for sequentially synchronizing a radio network | |
| US6539229B1 (en) | System and method for mobile location detection in synchronous wireless systems | |
| AU711603B2 (en) | Digital mobile communication system capable of establishing mutual synchronization among a plurality of radio base stations | |
| KR970000572B1 (en) | Cellular radio system using common radio backbone | |
| EP1892868A1 (en) | CDMA communication method and system, and base station and mobile station therefor | |
| FI97582C (en) | Synchronization of a mobile station broadcast | |
| KR20050055045A (en) | Synchronization of timing advance and deviation | |
| KR20030084516A (en) | Method and apparatus for multicast multimedia broadcast service data packet control in a cdma mobile communication system | |
| KR101178440B1 (en) | Synchronization of call traffic in the forward direction over backhaul links | |
| US6707807B1 (en) | Reception time of messages in access channels of TDMA mobile communication system controlled by transmitting device | |
| US7466989B2 (en) | Synchronization method for terminal-to-terminal direct communication in time division duplex mobile communication system | |
| WO2001001613A1 (en) | Method for extending the cell radius between a mobile station and a base station | |
| EP1413071B1 (en) | Wireless communication system, wireless communication unit and method of synchronisation | |
| JP2001526509A (en) | Base station synchronization method and cellular system | |
| US5408517A (en) | Method and apparatus for handoff synchronization | |
| EP1034678B1 (en) | Method and system for determining position of mobile radio terminals | |
| EP1362436B1 (en) | Intelligent repeater and method to provide increased signaling | |
| JPH03224325A (en) | Tdma digital mobile communication system | |
| EP2210445B1 (en) | Apparatus, method, and system for channel selection and allocation in mobile communications | |
| CN114828202A (en) | Method and system for base station air interface synchronization alignment | |
| JP2002542658A (en) | Synchronization method for base station | |
| KR102311700B1 (en) | Apparatus and method for measuring distance between base station and mobile terminal | |
| CN116321424A (en) | Link signal setting method for position measurement of mobile communication terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220729 |