CN-122002533-A - Communication method and device

Abstract

The application provides a communication method and a communication device, which can be applied to the field of satellite communication, such as NTN. The method comprises the steps that a terminal device receives first information, at least one candidate paging frame is determined in a first system frame set, and a first paging message is received on the first paging frame, wherein the first information is used for determining a first system frame set corresponding to a first wave bit, the system frames in the first system frame set are located in at least one first time period, the first time period represents the duration of the first wave bit being served, and the first paging frame belongs to the at least one candidate paging frame. Since the system frames in the first system frame set are located in at least one beam-on state period, the terminal device can only need to determine at least one candidate paging frame available for receiving the paging message in the first system frame set, so that the terminal device can select a corresponding paging frame in the at least one candidate paging frame to effectively receive the paging message in time.

Inventors

• ZHAO FEIRAN
• CHEN YING

Assignees

• 华为技术有限公司

Dates

Publication Date

20260508

Application Date

20241107

Claims (20)

1. 1. A communication method, applied to a terminal device, the method comprising: Receiving first information, wherein the first information is used for determining a first system frame set corresponding to a first wave bit, system frames in the first system frame set are located in at least one first time period, the first time period represents the duration of time that the first wave bit is served, and the at least one first time period is located in one paging cycle; Determining at least one candidate paging frame in the first set of system frames; A first paging message is received on a first paging frame, the first paging frame belonging to the at least one candidate paging frame.
2. 2. The method of claim 1, wherein the first information is to indicate one of: The frame number of the system frame contained in the at least one first period, or A start time and an end time of the first period, and a period of the first period.
3. 3. The method of claim 1 or 2, wherein determining at least one candidate paging frame in the first set of system frames comprises: the at least one candidate paging frame satisfies: SFN index =(Q div N)*(UE_ID mod N); (SFN+PF_offset)mod T=SFN pool (SFN index ) Wherein SFN index represents an index of a system frame in the first system frame set, SFN represents a frame number of the at least one candidate paging frame, Q represents a total number of system frames in the first system frame set, N represents a packet number of the first system frame set, ue_id represents an identification of the terminal device, pf_offset is a first offset, T represents the paging cycle, SFN pool represents the first system frame set, mod represents a modulo operation, div represents a division operation.
4. 4. The method of claim 3, wherein pf_offset has a value in the range [ -x-1, x ], where x is an integer greater than or equal to N.
5. 5. A method of communication, for use with a network device, the method comprising: Transmitting first information, wherein the first information is used for determining a first system frame set corresponding to a first wave bit, system frames in the first system frame set are located in at least one first time period, the first time period represents the duration of time that the first wave bit is served, and the at least one first time period is located in one paging cycle; A first paging message is sent on at least one candidate paging frame, the at least one candidate paging frame being located in the first set of system frames.
6. 6. The method of claim 5, wherein the first information is to indicate one of: The frame number of the system frame contained in the at least one first period, or A start time and an end time of the first period, and a period of the first period.
7. 7. The method of claim 5 or 6, wherein the at least one candidate paging frame satisfies: SFN index =(Q div N)*(UE_ID mod N); (SFN+PF_offset)mod T=SFN pool (SFN index ) Wherein SFN index represents an index of a system frame in the first system frame set, SFN represents a frame number of the at least one candidate paging frame, Q represents a total number of system frames in the first system frame set, N represents a packet number of the first system frame set, ue_id represents an identification of the terminal device, pf_offset is a first offset, T represents the paging cycle, SFN pool represents the first system frame set, mod represents a modulo operation, div represents a division operation.
8. 8. The method of claim 7, wherein pf_offset has a value in the range [ -x-1, x ], where x is an integer greater than or equal to N.
9. 9. A communication method, applied to a terminal device, the method comprising: receiving second information, wherein the second information is used for determining a reference paging frame set; Determining a second offset, wherein the second offset is an offset of a first paging frame set corresponding to a first wave bit group relative to the reference paging frame set, and the first wave bit group is a wave bit group to which the terminal device belongs; A second paging message is received on a second paging frame, the second paging frame being one of the first set of paging frames, the first set of paging frames being determined from the reference set of paging frames and the second offset.
10. 10. The method of claim 9, wherein determining the second offset comprises: third information is received, the third information including the second offset.
11. 11. The method of claim 9, wherein determining the second offset comprises: determining the second offset according to the first synchronization signal and the system frame where the physical broadcast channel PBCH block SSB is located and the first system frame; The first system frame is the nearest system frame located before the system frame where the first SSB is located in the reference paging frame set.
12. 12. The method of claim 9, wherein determining the second offset comprises: determining the second offset according to the system frame where the SSB burst to which the first SSB belongs is located and the second system frame; the second system frame is the nearest system frame located before the system frame where the SSB burst is located in the reference paging frame set.
13. 13. The method of claim 9, wherein determining the second offset comprises: Determining the second offset according to a system frame in which the beam opening time corresponding to the first wave bit group is located and a third system frame; The third system frame is the nearest system frame located before the system frame where the beam opening time is located in the reference paging frame set.
14. 14. The method of claim 9, wherein determining the second offset comprises: determining the second offset according to the beam opening time corresponding to the first wave bit group and the starting time of a fourth system frame; wherein the fourth system frame is the nearest system frame located before the beam on time in the reference paging frame set.
15. 15. The method of claim 9, wherein determining the second offset comprises: Determining the second offset according to the beam opening time corresponding to the first wave bit group and the starting time of the beam hopping pattern period; Wherein the beam hopping pattern period represents a time period of beam switching state formation.
16. 16. The method of any of claims 9-15, wherein the set of reference paging frames satisfies: (SFN’+PF_offset’)mod T=(T div N’)*(UE_ID mod N’) Wherein SFN ' represents a frame number in the reference paging frame set, pf_offset ' is a first offset, T represents the paging cycle, N ' represents the number of packets in the paging cycle, ue_id represents the identity of the terminal device, mod represents a modulo operation, and div represents a division operation.
17. 17. The method of claim 16, wherein pf_offset 'has a value in the range [ -x-1, x ], where x is an integer greater than or equal to N'.
18. 18. A method of communication, for use with a network device, the method comprising: Transmitting second information, wherein the second information is used for determining a reference paging frame set; and sending a second paging message on a paging frame in a first paging frame set, wherein the first paging frame set is determined according to the reference paging frame set and a second offset, the second offset is an offset of the first paging frame set relative to the reference paging frame set, and the first paging frame set corresponds to a first wave bit group.
19. 19. The method of claim 18, wherein the method further comprises: And transmitting third information, wherein the third information comprises the second offset.
20. 20. The method of claim 18, wherein the second offset is determined based on a system frame in which a first SSB is located and a first system frame, wherein the first system frame is a nearest system frame in the set of reference paging frames that precedes the system frame in which the first SSB is located.

Description

Communication method and device Technical Field The present application relates to the field of communications technologies, and in particular, to a communications method and apparatus. Background Compared with traditional terrestrial networks (such as the 4th generation (the 4th generation,4G) mobile communication system or the fifth generation (the 5th generation,5G) terrestrial mobile communication system), the non-terrestrial network (non-TERRESTRIAL NETWORK, NTN) has the characteristics of wider coverage, faster speed, lower cost and the like. Particularly, in places such as the sea, the desert, the air and the like where the ground network cannot be directly deployed, the system can be used as a supplement or extension of the ground network, and can provide indiscriminate communication service for global users by utilizing high, medium and low orbit satellites to realize the purpose of wide area seamless coverage and even global coverage, thereby effectively solving the problem of Internet access in the area with lack of communication infrastructure. Satellite communication is used as a typical scene of NTN, has the characteristics of long communication distance, large coverage area, flexible networking and the like, and can provide services for fixed terminal equipment and various mobile terminal equipment. Satellite communication is introduced into a traditional communication system (such as a 5G communication system), and base stations or partial base station functions are deployed on satellites, so that seamless coverage can be provided for terminal equipment, natural disaster influence can be avoided, and the reliability of the communication system is ensured. In a satellite communication system, a satellite may transmit a paging configuration to terminal devices located in a radio resource control (radio resource control, RRC) idle state (idle) or RRC inactive state (inactive) within a coverage area. After receiving the paging configuration, the terminal device in the RRC idle state or the RRC inactive state may determine a corresponding paging frame according to the paging configuration (PAGING FRAME). Then, the terminal device in the RRC idle state or the RRC inactive state may listen (or receive) for the paging message on the paging frame, thereby causing the terminal device in the RRC idle state or the RRC inactive state to enter the RRC connected state. However, in a satellite scenario, based on the movement characteristics of the satellite, the satellite has a limited time to provide beam services to the terminal devices in a certain ground area, and cannot provide beam services to the terminal devices in the ground area for a long time. In this case, the time when the satellite transmits the paging message is likely to be the time when the terminal device is not provided with beam service by the satellite (which can be understood as the time when it is not covered by the satellite downlink signal), so that the terminal device cannot receive the paging message. In this regard, how to make the terminal device effectively receive the paging message is to be further studied. Disclosure of Invention The application provides a communication method and a communication device, which are used for realizing that terminal equipment receives paging messages timely and effectively. In a first aspect, the present application provides a communication method, which can be performed by a terminal device. The terminal device may be a terminal device, or may be a component in the terminal device, for example, a communication module (communication module) capable of being applied to the terminal device, a circuit or a chip responsible for a communication function (such as a modem (modem) chip, a baseband (baseband) chip, or a system on chip (SoC) chip or a system in a package (SYSTEMIN PACKAGE) chip containing a modem core, a chip system or a processor, or may be a logic module or software capable of implementing all or part of the functions of the terminal device. The method may include the steps of the terminal device receiving first information, wherein the first information may be used to determine a first set of system frames corresponding to a first wave position, the system frames in the first set of system frames being located within at least one first period, the first period representing a duration of time the first wave position is served, the at least one first period being located within a paging cycle, and thereafter, the terminal device may determine at least one candidate paging frame in the first set of system frames, and then, the terminal device may receive a first paging message on the first paging frame, wherein the first paging frame belongs to the at least one candidate paging frame. In the method, since the system frames in the first system frame set are located in at least one first period (which can be understood as being in a beam on state period or a beam on period or a beam servi