CN118265098A - Satellite switching method, device, system and medium - Google Patents
Satellite switching method, device, system and medium Download PDFInfo
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- CN118265098A CN118265098A CN202410297030.7A CN202410297030A CN118265098A CN 118265098 A CN118265098 A CN 118265098A CN 202410297030 A CN202410297030 A CN 202410297030A CN 118265098 A CN118265098 A CN 118265098A
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Abstract
The invention relates to a satellite switching method, a device, a system and a medium, wherein the method comprises the following steps: receiving target service satellite information sent by a base station; carrying out beam measurement according to the received target service satellite information, and reporting a beam measurement result to a current service satellite; receiving a beam indication of a target service satellite sent by a base station; after the satellite switches the downlink synchronization, carrying out first uplink data transmission on beam resources indicated by the beams of the target service satellite; and receiving uplink feedback information of the base station on the corresponding beam resource to finish satellite switching. The invention can improve the data transmission reliability of the beam coverage change in the satellite switching process.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a satellite switching method, device, system, and medium.
Background
As the satellite moves, the serving satellite changes, but the ground base station (gNB) does not change, so most of the cell information does not change, and the following consistent or assumed conditions are achieved in the 3gpp ran2-123bis conference, namely: support soft/hard satellite handoff; the network can provide information configuration of the target service satellite; for a satellite handoff procedure, a User Equipment (UE) may begin a synchronization process for a target service satellite at a T-start time.
However, for the satellite switching scenario, due to the change of the service satellite, the beam situation of providing coverage also changes, and in this process, the user equipment cannot perform the first data transmission on the appropriate beam, which may cause data transmission failure, or even fall back to the RACH procedure, and introduce a larger time delay.
Aiming at the problem of coverage change of a satellite switching scene wave beam, the UE can measure SSB after accessing a target satellite, but extra time delay is introduced; in addition, if a plurality of CG resources are preconfigured on the target satellite, not only is resource waste easily caused, but also the beam most suitable for the UE is not necessarily in the SSB associated with the preconfigured CG resources, so the UE may not perform the first data transmission on the suitable beam, thereby causing data transmission failure, and even backing to the RACH procedure.
Disclosure of Invention
The invention aims to provide a satellite switching method, a device, a system and a medium, which can improve the data transmission reliability of the change of beam coverage in the satellite switching process.
The technical scheme adopted for solving the technical problems is as follows: provided is a satellite switching method, comprising the following steps:
Receiving target service satellite information sent by a base station; the target service satellite information is target satellite information of the next NTN service provided by the base station under the current service satellite;
Carrying out beam measurement according to the received target service satellite information, and reporting a beam measurement result to a current service satellite;
Receiving a beam indication of a target service satellite sent by a base station under a current service satellite;
After the satellite switches the downlink synchronization, carrying out first uplink data transmission on beam resources indicated by the beams of the target service satellite;
And receiving uplink feedback information of the base station on the corresponding beam resource to finish satellite switching.
The target service satellite information comprises SSB index and SMTC used for indicating the user equipment to carry out beam measurement, effective time of the beam measurement, reporting type of the beam measurement and reporting condition of the beam measurement.
The base station sends out the target service satellite information by adopting a special RRC signaling or broadcasting mode.
The beam measurement according to the received target service satellite information specifically includes:
Re-acquiring information capable of measuring SSB beams of the target service satellite and beam measurement time before the validity period configured for the auxiliary information at the network side and the duration indicated by EPOCHTime are finished;
after the beam measurement time and before the end of the current service satellite service duration, beam measurement is performed according to the SSB beam information of the target service satellite.
And the beam indication is to select the best SSB index corresponding beam on the target service satellite reported by the user equipment according to the beam measurement result.
The first uplink transmission is performed on the beam resource indicated by the beam of the target service satellite, which specifically includes:
If the beam indication is in a display indication mode, monitoring PDCCH in the beam direction, obtaining an uplink dynamic grant, and carrying out first uplink data transmission;
and if the beam indication is in a hidden indication mode, performing first uplink transmission on the preconfigured last uplink CG.
The technical scheme adopted for solving the technical problems is as follows: provided is a satellite switching device including:
The first receiving module is used for receiving the target service satellite information sent by the base station; the target service satellite information is target satellite information of the next NTN service provided by the base station under the current service satellite;
The beam measurement reporting module is used for carrying out beam measurement according to the received target service satellite information and reporting a beam measurement result to the current service satellite;
The second receiving module is used for receiving the beam indication of the target service satellite sent by the base station under the current service satellite;
The uplink data transmission module is used for carrying out first uplink data transmission on beam resources indicated by the beams of the target service satellite after the satellite is switched to downlink synchronization;
And the third receiving module is used for receiving the uplink feedback information of the base station on the corresponding beam resource and completing satellite switching.
The technical scheme adopted for solving the technical problems is as follows: there is provided an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the satellite handoff method described above when executing the computer program.
The technical scheme adopted for solving the technical problems is as follows: there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the satellite handoff method described above.
Advantageous effects
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects: before the service satellite is switched, the invention provides new measurement configuration of the service satellite through the network, and the UE can carry out beam selection of the service satellite in advance, thus not only saving the data transmission delay caused by the satellite switching flow, but also improving the reliability of the data transmission, reducing the problems of delay increase, RACH congestion and the like caused by the need of backing back to RACH access when the first uplink transmission fails, and improving the user experience and the throughput of the whole network.
Drawings
Fig. 1 is a flowchart of a satellite switching method according to a first embodiment of the present invention.
Detailed Description
The application will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present application and are not intended to limit the scope of the present application. Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the teachings of the present application, and such equivalents are intended to fall within the scope of the application as defined in the appended claims.
A first embodiment of the present invention relates to a satellite switching method, in which, before a service satellite is switched, a gNB allocates a beam on a new service satellite in advance according to a beam measurement result of a UE. When the UE initiates a satellite switching process and completes downlink synchronization on a new service satellite, the first UL data transmission may be performed on the new satellite beam, thereby completing the satellite switching process. As shown in fig. 1, the method specifically comprises the following steps:
Step 1, receiving target service satellite information sent by a base station; the target service satellite information is target satellite information of the next NTN service provided by the base station under the current service satellite.
In this step, the base station may send out the target service satellite information by using a dedicated RRC signaling or broadcasting method. The target service satellite information comprises SSB index and SMTC used for indicating the user equipment to perform beam measurement, effective time of the beam measurement, reporting type of the beam measurement and reporting condition of the beam measurement. The reporting type of the beam measurement may be one/more SSBRI of the target service satellites, or a combination of one/more SSBRI of the target service satellites and corresponding RSRP and/or SINR, or one/more SSBRI of the target service satellites with RSRP/SINR higher than a threshold value. The reporting condition of beam measurement refers to that the UE determines whether to report according to the measurement result, for example, if RSRP and/or SINR corresponding to best SSBRI of the target satellite are lower than a threshold, then not reporting.
And step 2, carrying out beam measurement according to the received target service satellite information, and reporting a beam measurement result to the current service satellite. In this step, beam measurement is specifically performed according to the received target service satellite information:
The UE re-acquires the information of the SSB beam capable of measuring the target service satellite and the beam measurement time before the validity period configured for the auxiliary information at the network side and the duration indicated by EPOCHTime are finished;
the UE performs beam measurement according to the SSB beam information of the target service satellite after the beam measurement time and before the end of the current service satellite service duration.
After the beam measurement is completed, the UE reports a measurement result according to the beam measurement requirement configured by the gNB, wherein the measurement result can be reported through a measurement report of L1 or through MAC CE; the gNB needs to distinguish whether the measurement report is used to indicate the current service satellite or the target service satellite, for example, whether the report corresponds to the current service satellite or the target service satellite may be distinguished by setting different types of L1 test report events or different MAC CE types.
And step 3, receiving the beam indication of the target service satellite sent by the base station under the current service satellite.
In this step, after receiving the beam measurement result of the UE, the gNB selects the beam (beam) corresponding to the best SSB index on the target service satellite reported by the UE as the beam indication, and notifies the UE.
The beam indication may explicitly indicate SSB index of the target serving satellite (cell) through DCI or MAC CE; the gNB needs to indicate to the UE whether the beam indication is from the current serving satellite or the target serving satellite, e.g., by setting different types of DCI or different MAC CE types to distinguish whether the beam indication corresponds to the current serving satellite or the target serving satellite;
The beam indication may also implicitly indicate the target serving satellite (cell) by configuring uplink CG (Configured Grant) on the best beam of the target satellite, and the UE obtains beam information through association of CG resources and SSB index.
If the beam measurement result does not meet the beam reporting condition, the gNB may choose not to perform beam indication.
And 4, after the satellite is switched to downlink synchronization, carrying out first uplink transmission on beam resources indicated by the beams of the target service satellite. The method specifically comprises the following steps:
If the beam indication is in a display indication mode, the UE can monitor the PDCCH in the beam direction, obtain an uplink dynamic grant and perform first uplink data transmission;
If the beam indication is in a implicit indication mode, the UE can perform first uplink transmission on the preconfigured last uplink CG;
If the beam indication of the gNB is not obtained, the UE can perform uplink synchronization based on the RACH of contention or non-contention, so as to obtain an uplink grant for the first uplink transmission.
And step 5, receiving uplink feedback information of the base station on the corresponding beam resources to finish satellite switching.
It is not difficult to find that the invention provides new measurement configuration of the service satellite through the network before the service satellite is switched, and the UE can perform beam selection of the service satellite in advance, so that not only is the data transmission delay caused by the satellite switching flow saved, but also the reliability of the data transmission is improved, the problems of delay increase, RACH congestion and the like caused by the need of backing to RACH access when the first uplink fails are reduced, and the user experience and the throughput of the whole network can be improved.
A second embodiment of the present invention relates to a satellite switching device including:
The first receiving module is used for receiving the target service satellite information sent by the base station; the target service satellite information is target satellite information of the next NTN service provided by the base station under the current service satellite;
The beam measurement reporting module is used for carrying out beam measurement according to the received target service satellite information and reporting a beam measurement result to the current service satellite;
The second receiving module is used for receiving the beam indication of the target service satellite sent by the base station under the current service satellite;
The uplink data transmission module is used for carrying out first uplink data transmission on beam resources indicated by the beams of the target service satellite after the satellite is switched to downlink synchronization;
And the third receiving module is used for receiving the uplink feedback information of the base station on the corresponding beam resource and completing satellite switching.
The target service satellite information comprises SSB index and SMTC used for indicating the user equipment to carry out beam measurement, effective time of the beam measurement, reporting type of the beam measurement and reporting condition of the beam measurement.
The base station sends out the target service satellite information by adopting a special RRC signaling or broadcasting mode.
The beam measurement reporting module comprises:
An acquiring unit, configured to re-acquire information capable of measuring an SSB beam of a target service satellite and a beam measurement time before a validity period configured for the assistance information at the network side and a duration indicated by EPOCHTime end;
And the measuring unit is used for carrying out beam measurement according to the information of the SSB beam of the target service satellite after the beam measurement time and before the service duration of the current service satellite is finished.
And the beam indication is to select the best SSB index corresponding beam on the target service satellite reported by the user equipment according to the beam measurement result.
The uplink data transmission module comprises:
The first execution unit is used for monitoring the PDCCH in the beam direction when the beam indication is in a display indication mode, obtaining an uplink dynamic grant and carrying out first uplink data transmission;
And the second execution unit is used for carrying out first uplink data transmission on the preconfigured last uplink CG when the beam indication is in a hidden indication mode.
A third embodiment of the invention relates to an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the satellite handoff method of the first embodiment when executing the computer program.
A fourth embodiment of the invention relates to a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the satellite handoff method of the first embodiment.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, magnetic disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A satellite switching method, comprising the steps of:
Receiving target service satellite information sent by a base station; the target service satellite information is target satellite information of the next NTN service provided by the base station under the current service satellite;
Carrying out beam measurement according to the received target service satellite information, and reporting a beam measurement result to a current service satellite;
Receiving a beam indication of a target service satellite sent by a base station under a current service satellite;
After the satellite switches the downlink synchronization, carrying out first uplink data transmission on beam resources indicated by the beams of the target service satellite;
And receiving uplink feedback information of the base station on the corresponding beam resource to finish satellite switching.
2. The satellite handoff method of claim 1, wherein said target service satellite information comprises SSB index and SMTC for instructing a user equipment to make beam measurements and an effective time of beam measurements, a reporting type of beam measurements, and reporting conditions of beam measurements.
3. The satellite handoff method of claim 1, wherein said base station transmits target service satellite information using dedicated RRC signaling or broadcasting.
4. The satellite switching method according to claim 1, wherein the performing beam measurement according to the received target service satellite information specifically includes:
Re-acquiring information capable of measuring SSB beams of the target service satellite and beam measurement time before the validity period configured for the auxiliary information at the network side and the duration indicated by EPOCHTime are finished;
after the beam measurement time and before the end of the current service satellite service duration, beam measurement is performed according to the SSB beam information of the target service satellite.
5. The satellite switching method according to claim 1, wherein the beam indication is to select a beam corresponding to a best SSB index on a target service satellite reported by the user equipment according to a beam measurement result.
6. The satellite switching method according to claim 1, wherein the first uplink is performed on beam resources indicated by beams of the target service satellite, and specifically comprises:
If the beam indication is in a display indication mode, monitoring PDCCH in the beam direction, obtaining an uplink dynamic grant, and carrying out first uplink data transmission;
and if the beam indication is in a hidden indication mode, performing first uplink transmission on the preconfigured last uplink CG.
7. A satellite switching device, comprising:
The first receiving module is used for receiving the target service satellite information sent by the base station; the target service satellite information is target satellite information of the next NTN service provided by the base station under the current service satellite;
The beam measurement reporting module is used for carrying out beam measurement according to the received target service satellite information and reporting a beam measurement result to the current service satellite;
The second receiving module is used for receiving the beam indication of the target service satellite sent by the base station under the current service satellite;
The uplink data transmission module is used for carrying out first uplink data transmission on beam resources indicated by the beams of the target service satellite after the satellite is switched to downlink synchronization;
And the third receiving module is used for receiving the uplink feedback information of the base station on the corresponding beam resource and completing satellite switching.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the satellite handoff method according to any one of claims 1-6 when the computer program is executed.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the satellite switching method according to any one of claims 1-6.
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| Publication Number | Publication Date |
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| CN118265098A true CN118265098A (en) | 2024-06-28 |
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