CN110446254A - A kind of uplink timing advance predictably terminal imagination method for satellite communication system - Google Patents
A kind of uplink timing advance predictably terminal imagination method for satellite communication system Download PDFInfo
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- CN110446254A CN110446254A CN201910866151.8A CN201910866151A CN110446254A CN 110446254 A CN110446254 A CN 110446254A CN 201910866151 A CN201910866151 A CN 201910866151A CN 110446254 A CN110446254 A CN 110446254A
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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Abstract
The invention discloses a kind of uplink timing advance predictably terminal imagination methods for satellite communication system, belong to satellite communication field.Pass through the scene that satellite is communicated with ground gateway station suitable for ground based terminal, realizes the uplink synchronization tracking of multiple terminal rooms in a beam coverage of satellite.Terminal is obtained initial uplink timing advance, uplink signal is sent by the way of timing advance by random access.Terminal predicts uplink Delay Variation amount using the method for the present invention, obtains uplink timing advance correction value, is updated according to certain frequency to Timing Advance, to obtain accurate open loop uplink timing tracking mechanism.The present invention utilizes satellite ephemeris, by predicting satellite position, predicts terminal uplink Timing Advance situation of change, guarantees uplink synchronous performance；Terminal voluntarily maintaining uplink Timing Synchronization can be effectively reduced system load and be easily achieved without gateway station control.
Description
Technical field
The invention belongs to satellite communication fields, and in particular to defend way system uplink timing advance predictably terminal imagination side to one kind
Method.
Technical background
Satellite communication is the important achievement that space technology and modern communication technology combine, in radio and television, mobile communication
And the fields such as broadband internet are widely used, and are one of current essential communication modes.With ground communication phase
Than satellite communication has area coverage big, and communication distance is remote, the communications cost advantage unrelated with communication distance.Meanwhile satellite is logical
The foundation of letter system is not limited by geographical conditions, has a wide range of mobility.
Satellite includes Low Earth Orbit (LEO), Medium-Earth Orbit (MEO), geostationary orbit (GEO) or highly elliptical orbit
(HEO) aerospace craft in.Unlike the mobile communication system based on ground infrastructure, satellite distance ground compared with
Far, propagation delay time is larger.LEO satellite operates on the track apart from ground 500km~1500km, and the track of GEO satellite away from
Ground is more up to 36000km, and when satellite antenna angle of declination is smaller, terminal can also be considerably beyond this number at a distance from satellite
Value.The round-trip delay that satellite transmission is generally indicated with absolute RTT (Round-Trip Time) and opposite RTT, wherein absolutely
RTT refers to signal two-way time needed for satellite and terminal room transmission, and opposite RTT is referred in satellite coverage
The difference of maximum round trip time and minimum two-way time.As shown in Figure 1, in a beam area, the terminal nearest apart from satellite
With the smallest propagation delay time.For LEO satellite, typical absolutely RTT can achieve 40ms or so, and opposite RTT reaches
Arrive 4ms or so.So being far longer than a cell in ground based cellular communication system due to the region of the single wave cover of satellite
Range, satellite mobile communication system have the characteristics that transmission time delay difference is big with respect to ground mobile communication system.
In satellite communication system, most important problem is to maintain the orthogonality of each terminal uplink, that is, sends
The frequency and time synchronization of signal.Consistent with GCS Ground Communication System, in satellite communication system, the time calibration of uplink is logical
It crosses and is realized in terminal using a timing advance.Its main function is that the propagation delay between counteracting different terminals is poor.
In GCS Ground Communication System, after terminal receiver establishes downlink transmission synchronous with base station for the first time, random access is used
(PRACH) process setting initial time lead.It is for the first time being after each terminal is provided with timing advance, it is also necessary to constantly update
To offset the time change that uplink signal reaches base station.These variations include the movement of terminal, the variation of propagation path, crystal oscillator frequency
Rate offset etc..The timing advance renewal process for eliminating these influences is realized by a closed loop mechanism, wherein base station measurement
The uplink timing that receives simultaneously issues timing advance more newer command, and with instruction terminal, relative to transmission timing adjustment before, it is new
Transmission timing.
This process can face following problem when being applied to satellite communication field: one is in satellite communication when path transmission
Prolong it is very big, terminal obtain be when new transmission timing the uplink signal that measures of gateway station for a period of time after, newly
Transmission timing may be not suitable in current upstream transmission window；The second is terminal and satellite may all be located in satellite communication system
In high-speed mobile, time change is too fast, and time advance more newer command is caused to need frequent updating.Existing technical solution does not have also
There is the method for relatively accurately carrying out open loop uplink timing tracking.
In satellite communication system, satellite and terminal may be all in high-speed mobiles, and movement velocity is up to several kilometers often
Second, the transmission range of link is long, and One Way Delay is up to a few tens of milliseconds.Ground gateway station measures in uplink time-delay calculation
At the time of row time renewal amount, at the time of sending data using the Timing Advance with terminal between there are the biggish time difference,
The position of satellite has occurred that change, causes Timing Advance expired.
Consider that problem above, the present invention propose a kind of uplink timing advance prediction technique, terminal according to gateway station location,
Ephemeris and terminal location, the uplink time-delay deviation caused by satellite motion are predicted, are obtained terminal and are sent the data moment
Corresponding Timing Advance.
Summary of the invention
In order to solve the problems, such as that satellite communication link propagation delay is big and satellite high-speed motion bring uplink synchronization tracking,
The invention proposes one kind to defend way system uplink timing advance predictably terminal imagination method.
The invention proposes one kind to defend way system uplink timing advance predictably terminal imagination method, passes through suitable for ground based terminal
The scene that satellite is communicated with ground gateway station realizes the uplink synchronous of multiple terminal rooms in a beam coverage of satellite
Tracking.Terminal obtains initial uplink timing advance by random access, and uplink letter is sent by the way of timing advance
Number.Terminal predicts uplink Delay Variation amount using the method for the present invention, obtains uplink timing advance correction value, presses
Timing Advance is updated according to certain frequency, to obtain accurate open loop uplink timing tracking mechanism.Such as Fig. 1 institute
Show, the present invention is achieved through the following technical solutions, a kind of uplink timing advance predictably terminal imagination side for satellite communication system
Method, this method comprises:
Step 1: terminal obtains gateway station location information by gateway station broadcast singal, speculates different moments based on ephemeris
Satellite position；
Step 2: terminal combination gateway station location, terminal location, satellite position estimate uplink time delay；It calculates first existing
There is timing advance TAINTThe uplink time delay d at corresponding moment0, then calculate and update the upper of Timing Advance moment next time
Row propagation delay time d1；
Step 3: terminal calculates Timing Advance correction value TAUP=2 (d1-d0), and Timing Advance is updated
TANEW=TAINT+TAUP, and upstream data is sent with new Timing Advance.
One kind of the present invention defends way system uplink timing advance predictably terminal imagination method, has relative to existing technology with below
Beneficial effect:
(1) present invention utilize satellite ephemeris, by predict satellite position, to terminal uplink Timing Advance situation of change into
Row prediction, guarantees uplink synchronous performance.
(2) in the present invention terminal can voluntarily maintaining uplink Timing Synchronization, controlled without gateway station, can be effectively reduced system
It loads and is easily achieved.
Detailed description of the invention
Fig. 1 is that the present invention defends way system uplink timing advance predictably terminal imagination method flow diagram.
Fig. 2 is satellite communication system uplink timing diagram
Fig. 3 is satellite communication system uplink synchronization tracking flow diagram
Fig. 4 is the uplink timing diagram based on timing advance.
Fig. 5 is specific implementation instance graph of the invention
Specific embodiment
Invention will be further explained below with reference to the drawings and examples..
The invention proposes one kind to defend way system uplink timing advance predictably terminal imagination method, passes through suitable for ground based terminal
The scene that satellite is communicated with the gateway station on ground realizes that the uplink of multiple terminal rooms in a beam coverage of satellite is same
Step tracking.
Satellite communication system uplink timing is as shown in Figure 2.
T0: terminal is according to existing timing advance TAINTAt the time of sending uplink signal.
T01: terminal T0At the time of the signal that moment sends reaches satellite.
T1: terminal T0At the time of the signal that moment sends reaches gateway station.
T2: terminal updates local Timing Advance, and at the time of send uplink signal with the Timing Advance after updating.
T23: terminal T2At the time of the signal that moment sends reaches satellite.
T3: terminal T2At the time of the signal that moment sends reaches gateway station.
T4: terminal updates local Timing Advance, and at the time of send uplink signal with the Timing Advance after updating.
T45: terminal T4At the time of the signal that moment sends reaches satellite.
T5: terminal T4At the time of the signal that moment sends reaches gateway station.
Specific embodiment is as follows: considering for the satellite communication system for being deployed in our domestic covering Asia, ground
In different places, such as Beijing, Guangzhou, gateway station at three, the ground control node as satellite are disposed in Lhasa.Assuming that hair
60 near-earth polar region satellites are penetrated, orbit altitude 1175km, satellite radial velocity 6.1km/s realize the satellite communication in covering Asia
System.Now with Beijing gateway station G1, the invention patent is illustrated for the cell of the wave cover of the satellite S1 of connection.
Satellite communication system scene in examples detailed above is as shown in Figure 5, comprising: the gateway station G1 on ground, space track
Satellite S1 and terminal 1 and terminal 2 in satellite beams coverage area；
Satellite communication system uplink synchronization tracking process is as shown in figure 3, terminal obtains initial uplink by random access
Timing Advance sends uplink signal by the way of timing advance.Terminal becomes uplink time delay using the method for the present invention
Change amount is predicted, uplink timing advance correction value is obtained, and is updated according to certain frequency to Timing Advance, thus
To accurate open loop uplink timing tracking mechanism.
Below by above-mentioned embodiment, the implementation steps and method of this patent are illustrated:
Step 1: gateway station is by establishing connection with satellite S1, and satellite S1 informs gateway station G1 satellite number, orbit information,
And (for satellite S1 there may be multiple wave beams, the user under each wave beam is divided in the same cell to beam coverage information
It is interior).Here consider terminal 1, the cell C1 where terminal 2.
Step 2: terminal 1, terminal 2 respectively receive down-going synchronous frame, complete downgoing time and synchronize, and obtain cell system letter
Breath, including uplink random access information.
Step 3: terminal 1, terminal 2, first random access window after completing down-going synchronous send uplink random
Access signal gives satellite S1, satellite S1 to be transmitted to gateway station G1.Sending time is the T0 moment.
Step 4: gateway station G1 accesses signal by uplink random, calculates the uplink time delay of terminal 1 and terminal 2,
And according to propagation delay time, initial timing lead TA1 and TA2 is calculated.Assuming that TA1=32.2ms, TA2=33.6ms, corresponding
Feeding link distance is 3600km, and corresponding user link distance is respectively 1230km, 1440km.
Step 5: gateway station G1 feeds back to initial timing advance TA 1 and TA2 in random access response signal RAR
Terminal 1 and terminal 2.
Step 6: terminal 1 and terminal 2 adjust separately local after receiving initial uplink timing advance TA 1 and TA2
Time.
Step 7: assuming that uplink transmission time is T2 next time, and T2-T0=40ms.
Step 8: terminal 1 and terminal 2 calculate feed respectively according to the variable quantity of ephemeris computation itself uplink time delay first
The Delay Variation amount of link, obtains Dcom=3600.202km.The distance of user link is respectively D1=1230.065km；D2=
1440.127km.Corresponding new uplink time delay is respectively 16.10089ms and 16.80109ms.
Step 9: terminal 1 and terminal 2 go out corresponding Timing Advance according to the uplink time-delay calculation at T4 moment and are
32.20178ms with 33.60218ms.It is consequently possible to calculate the renewal amount of Timing Advance is respectively TAupd1=1.78us out；
TAupd2=2.18us；
Step 10: terminal 1 and terminal 2 are to update local zone time on the basis of the T4 time, complete the synchronous transfer of uplink signal.
As shown in figure 4, when sending uplink signal in a manner of uplink timing advance, the Timing Advance etc. of uplink signal
2 times of chain-circuit time delay between terminal and gateway station.By taking terminal 1 as an example, and the link propagation time delay of gateway station is TP1, then
Its Timing Advance responded is 2TP1.When sending uplink signal in a manner of timing advance, different terminals are due to apart from satellite
The different propagation delay for leading to path of distance it is different, so that the Timing Advance of each terminal is different.But each end
The time that the uplink signal at end reaches gateway station is substantially aligned with.In the present invention, terminal is using ephemeris information to satellite motion
Caused by time delay error predicted, the uplink timing advance of different sending instants is modified.
The embodiment of the present invention has been described in detail above, and specific embodiment used herein carries out the present invention
It illustrates, the above description of the embodiments is only used to help understand the method and apparatus of the present invention；Meanwhile for the one of this field
As technical staff, according to the thought of the present invention, there will be changes in the specific implementation manner and application range, to sum up institute
It states, the contents of this specification are not to be construed as limiting the invention.
Claims (1)
1. a kind of uplink timing advance predictably terminal imagination method for satellite communication system, this method comprises:
Step 1: terminal obtains gateway station location information by gateway station broadcast singal, and the satellite of different moments is speculated based on ephemeris
Position；
Step 2: terminal combination gateway station location, terminal location, satellite position estimate uplink time delay；It is existing fixed to calculate first
When lead TAINTThe uplink time delay d at corresponding moment0, then calculate the uplink biography for updating the Timing Advance moment next time
Defeated time delay d1；
Step 3: terminal calculates Timing Advance correction value TAUP=2 (d1-d0), and TA is updated to Timing AdvanceNEW=
TAINT+TAUP, and upstream data is sent with new Timing Advance.
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111107625A (en) * | 2019-12-27 | 2020-05-05 | 海能达通信股份有限公司 | Uplink synchronization method, terminal and base station |
| CN111262616A (en) * | 2020-01-15 | 2020-06-09 | 广州爱浦路网络技术有限公司 | User data switching device and switching method for low-orbit satellite gateway station |
| CN111491363A (en) * | 2020-03-11 | 2020-08-04 | 海能达通信股份有限公司 | Signal sending and processing method and device |
| CN111770565A (en) * | 2020-06-23 | 2020-10-13 | 中国科学院上海微系统与信息技术研究所 | Timing advance adjusting method for non-ground network |
| CN113115429A (en) * | 2021-03-05 | 2021-07-13 | 北京邮电大学 | Crystal oscillator frequency offset determination method, device and communication system |
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| US11082973B2 (en) * | 2018-06-20 | 2021-08-03 | Qualcomm Incorporated | Upstream timing control mechanisms for non-terrestrial networks |
| WO2021159449A1 (en) * | 2020-02-14 | 2021-08-19 | Oppo广东移动通信有限公司 | Method for updating timing advance, terminal device, and network device |
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| EP3913996A1 (en) * | 2020-05-08 | 2021-11-24 | Samsung Electronics Co., Ltd. | Methods for timing advance indication and timing relationships indication for non-terrestrial networks |
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| CN113992257A (en) * | 2020-07-27 | 2022-01-28 | 大唐移动通信设备有限公司 | Satellite timing synchronization method, device, equipment and storage medium |
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| WO2023130365A1 (en) * | 2022-01-07 | 2023-07-13 | Oppo广东移动通信有限公司 | Method for recovering uplink synchronization, terminal device, and storage medium |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5644572A (en) * | 1995-10-03 | 1997-07-01 | Motorola, Inc. | Method and apparatus for approximating propagation delay for use in transmission compensation to orbiting satellites |
| EP2177929A1 (en) * | 2008-10-17 | 2010-04-21 | European Space Agency | Navigation-satellite tracking method and receiving station |
| CN103346829A (en) * | 2013-07-01 | 2013-10-09 | 北京大学 | Initial random access two-step delay measurement method for satellite communication compatible with LTE mode |
| CN103379435A (en) * | 2012-04-28 | 2013-10-30 | 电信科学技术研究院 | Broadcast message transmission method and device based on satellite mobile communication system |
| CN103945471A (en) * | 2013-01-21 | 2014-07-23 | 电信科学技术研究院 | Cell switching method and device |
| CN104796927A (en) * | 2014-01-20 | 2015-07-22 | 北京三星通信技术研究有限公司 | Discovery Signal reception method and device and discovery signal detection method and device |
| CN107197517A (en) * | 2017-08-02 | 2017-09-22 | 电子科技大学 | The LTE satellite uplink synchronous method being grouped based on TA |
| CN107333241A (en) * | 2017-08-02 | 2017-11-07 | 电子科技大学 | The up transmitting terminal timing adjusting method of satellite mobile communication based on LTE systems |
| CN107528628A (en) * | 2017-09-28 | 2017-12-29 | 中国电子科技集团公司第七研究所 | The signal synchronizing method of satellite communication system, device and system |
| CN109474986A (en) * | 2018-12-27 | 2019-03-15 | 西安电子科技大学 | Uplink synchronisation method, device, equipment, storage medium and LTE communication system |
| CN110149141A (en) * | 2019-05-24 | 2019-08-20 | 东南大学 | Signal transmission timing method based on UTC |
-
2019
- 2019-09-12 CN CN201910866151.8A patent/CN110446254B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5644572A (en) * | 1995-10-03 | 1997-07-01 | Motorola, Inc. | Method and apparatus for approximating propagation delay for use in transmission compensation to orbiting satellites |
| EP2177929A1 (en) * | 2008-10-17 | 2010-04-21 | European Space Agency | Navigation-satellite tracking method and receiving station |
| CN103379435A (en) * | 2012-04-28 | 2013-10-30 | 电信科学技术研究院 | Broadcast message transmission method and device based on satellite mobile communication system |
| CN103945471A (en) * | 2013-01-21 | 2014-07-23 | 电信科学技术研究院 | Cell switching method and device |
| CN103346829A (en) * | 2013-07-01 | 2013-10-09 | 北京大学 | Initial random access two-step delay measurement method for satellite communication compatible with LTE mode |
| CN104796927A (en) * | 2014-01-20 | 2015-07-22 | 北京三星通信技术研究有限公司 | Discovery Signal reception method and device and discovery signal detection method and device |
| CN107197517A (en) * | 2017-08-02 | 2017-09-22 | 电子科技大学 | The LTE satellite uplink synchronous method being grouped based on TA |
| CN107333241A (en) * | 2017-08-02 | 2017-11-07 | 电子科技大学 | The up transmitting terminal timing adjusting method of satellite mobile communication based on LTE systems |
| CN107528628A (en) * | 2017-09-28 | 2017-12-29 | 中国电子科技集团公司第七研究所 | The signal synchronizing method of satellite communication system, device and system |
| CN109474986A (en) * | 2018-12-27 | 2019-03-15 | 西安电子科技大学 | Uplink synchronisation method, device, equipment, storage medium and LTE communication system |
| CN110149141A (en) * | 2019-05-24 | 2019-08-20 | 东南大学 | Signal transmission timing method based on UTC |
Non-Patent Citations (2)
| Title |
|---|
| HEYIZHOU: "Timing Advanced Estimation Algorithm of Low Complexity Based on DFT Spectrum Analysis for Satellite System", 《CHINA COMMUNICATION》 * |
| 汪春霆: "【卫星+5G】卫星通信与地面5G的融合初探（二）", 《 HTTPS://WWW.SOHU.COM/A/274333312_466840》 * |
Cited By (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN111107625A (en) * | 2019-12-27 | 2020-05-05 | 海能达通信股份有限公司 | Uplink synchronization method, terminal and base station |
| WO2021142633A1 (en) * | 2020-01-14 | 2021-07-22 | 华为技术有限公司 | Communication method and apparatus |
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| CN111262616A (en) * | 2020-01-15 | 2020-06-09 | 广州爱浦路网络技术有限公司 | User data switching device and switching method for low-orbit satellite gateway station |
| CN111262616B (en) * | 2020-01-15 | 2020-11-13 | 广州爱浦路网络技术有限公司 | User data switching device and switching method for low-orbit satellite gateway station |
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| CN113365365A (en) * | 2020-03-07 | 2021-09-07 | 大唐移动通信设备有限公司 | Method and equipment for transmitting PRACH (physical random access channel) signal |
| CN113365365B (en) * | 2020-03-07 | 2023-11-21 | 大唐移动通信设备有限公司 | Method and equipment for transmitting PRACH (physical random Access channel) signals |
| CN113766627A (en) * | 2020-03-11 | 2021-12-07 | 海能达通信股份有限公司 | Signal sending and processing method and device |
| CN111491363A (en) * | 2020-03-11 | 2020-08-04 | 海能达通信股份有限公司 | Signal sending and processing method and device |
| WO2021189183A1 (en) * | 2020-03-23 | 2021-09-30 | Oppo广东移动通信有限公司 | Ta determination method and apparatus, and terminal device |
| EP3913996A1 (en) * | 2020-05-08 | 2021-11-24 | Samsung Electronics Co., Ltd. | Methods for timing advance indication and timing relationships indication for non-terrestrial networks |
| WO2021232412A1 (en) * | 2020-05-22 | 2021-11-25 | 株式会社Ntt都科摩 | Terminal and method executed by terminal |
| CN111770565A (en) * | 2020-06-23 | 2020-10-13 | 中国科学院上海微系统与信息技术研究所 | Timing advance adjusting method for non-ground network |
| CN113939005B (en) * | 2020-06-29 | 2024-05-07 | 北京小米移动软件有限公司 | Down synchronization method, user equipment, electronic equipment and computer storage medium |
| CN113939005A (en) * | 2020-06-29 | 2022-01-14 | 北京小米移动软件有限公司 | Downlink synchronization method, user equipment, electronic equipment and computer storage medium |
| CN113992257A (en) * | 2020-07-27 | 2022-01-28 | 大唐移动通信设备有限公司 | Satellite timing synchronization method, device, equipment and storage medium |
| WO2022030851A1 (en) * | 2020-08-06 | 2022-02-10 | 엘지전자 주식회사 | Method and device for transmitting and receiving signals in wireless communication system |
| CN114599080B (en) * | 2020-12-03 | 2024-02-02 | 海能达通信股份有限公司 | Uplink synchronization method and device, storage medium, terminal and gateway station |
| CN114599080A (en) * | 2020-12-03 | 2022-06-07 | 海能达通信股份有限公司 | Uplink synchronization method and device, storage medium, terminal and gateway station |
| WO2022127806A1 (en) * | 2020-12-15 | 2022-06-23 | 华为技术有限公司 | Wireless communication method and apparatus |
| CN113115429A (en) * | 2021-03-05 | 2021-07-13 | 北京邮电大学 | Crystal oscillator frequency offset determination method, device and communication system |
| CN113115429B (en) * | 2021-03-05 | 2022-05-06 | 北京邮电大学 | Crystal oscillator frequency offset determination method, device and communication system |
| WO2023011148A1 (en) * | 2021-08-05 | 2023-02-09 | 华为技术有限公司 | Uplink signal synchronization method and communication apparatus |
| CN113612523A (en) * | 2021-08-23 | 2021-11-05 | 东方红卫星移动通信有限公司 | Uplink time precompensation algorithm, terminal synchronization method and system |
| CN113612523B (en) * | 2021-08-23 | 2023-02-28 | 东方红卫星移动通信有限公司 | Uplink time precompensation algorithm, terminal synchronization method and system |
| WO2023045759A1 (en) * | 2021-09-26 | 2023-03-30 | 大唐移动通信设备有限公司 | Timing advance method and apparatus, and storage medium |
| CN114270962A (en) * | 2021-11-15 | 2022-04-01 | 北京小米移动软件有限公司 | Uplink synchronization method and device and readable storage medium |
| WO2023108656A1 (en) * | 2021-12-17 | 2023-06-22 | 北京小米移动软件有限公司 | Measurement method and apparatus for global navigation satellite system (gnss) |
| WO2023130264A1 (en) * | 2022-01-05 | 2023-07-13 | 北京小米移动软件有限公司 | Uplink synchronization method, device, and readable storage medium |
| WO2023130365A1 (en) * | 2022-01-07 | 2023-07-13 | Oppo广东移动通信有限公司 | Method for recovering uplink synchronization, terminal device, and storage medium |
| CN114745051B (en) * | 2022-06-09 | 2022-08-23 | 北京融为科技有限公司 | Control method and device for satellite-ground laser communication |
| CN114745051A (en) * | 2022-06-09 | 2022-07-12 | 北京融为科技有限公司 | Control method and device for satellite-ground laser communication |
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