Timing advance adjustment method and system, base station, user equipment, and non-terrestrial network

Abstract

The present disclosure relates to a timing advance adjustment method and system, a base station, user equipment, and a non-terrestrial network. The timing advance adjustment method comprises: user equipment reporting user timing advance assistance information to a base station, the user timing advance assistance information being used for the base station to update a timing advance value on the basis of the user timing advance assistance information, and perform scheduling on the basis of the updated timing advance value, the user equipment being user equipment having reduced capability. The present disclosure, by means of reporting user TA assistance information, can adjust a TA value acquired by a network side, thereby avoiding a scheduling conflict of the base station.

Description

Timing advance adjustment method and system, base station, user equipment and non-terrestrial network

[0001] Cross-reference to related applications

[0002] This application is based on the application with CN application number CN202410881160.5 and application date of July 2, 2024, and claims priority thereto, the disclosure of which is hereby incorporated by reference in its entirety. TECHNICAL FIELD

[0003] The present disclosure relates to the field of wireless communication, in particular to a timing advance adjustment method and system, a base station, a user equipment and a non-terrestrial network. BACKGROUND

[0004] In a satellite communication scenario, the distance between the user and the satellite, and the distance between the satellite and the ground base station is far, and the transmission delay is large. The network side broadcasts parameters such as ephemeris information, and the user equipment calculates the service link round-trip time delay according to its own position and satellite ephemeris, and autonomously pre-compensates the timing advance between the user equipment and the satellite and reports the timing advance value T TA , TA (Timing advance), which is used to control the uplink transmission timing of a single user, to ensure that the data transmitted by all users is received synchronously by the base station, and is represented by T TA . UE_specific TA is the timing advance between the user equipment and the satellite (i.e. service link), and the user calculates the round-trip transmission delay between the user equipment and the satellite according to its own position and satellite ephemeris, determines the TA value that needs to be pre-compensated, and is represented by .

[0005] Unlike terrestrial networks, considering the movement of users and satellites, especially the high-speed movement of low-orbit satellites, the TA value obtained by the base station through the user report may be different from the TA value actually used by the user at that moment. When the user equipment type is RedCap (Reduced Capability, reduced capability terminal, such as reduced capability 5G terminal), the difference between the actual TA value of the user side and the TA value of the user known by the base station according to the user's TA-report (report) may cause scheduling conflicts at the base station. SUMMARY

[0006] According to one aspect of the present disclosure, a timing advance adjustment method for a non-terrestrial network is provided, comprising:

[0007] The user equipment reports user timing advance auxiliary information to the base station, wherein the user timing advance auxiliary information is used for the base station to update a timing advance value according to the user timing advance auxiliary information and to perform scheduling according to the updated timing advance value, and the user equipment is a reduced capability user equipment.

[0008] In some embodiments of the present disclosure, the timing advance adjustment method further comprises: the user equipment receiving the updated timing advance value issued by the base station.

[0009] In some embodiments of the present disclosure, the user equipment reporting the user timing advance auxiliary information to the base station comprises:

[0010] In the case that the user equipment is allowed to report the timing advance auxiliary information, the user equipment reports the user timing advance auxiliary information to the base station.

[0011] In some embodiments of the present disclosure, the user timing advance auxiliary information comprises at least one of the following information:

[0012] A rate of change of a timing advance amount between the user equipment and a satellite;

[0013] A position of the user equipment;

[0014] A current cell identity of the user equipment;

[0015] A moving speed, a moving acceleration and a moving direction of the user equipment;

[0016] Whether a scheduling conflict occurs in a time interval between a previous user timing advance auxiliary information reporting and a current user timing advance auxiliary information reporting.

[0017] In some embodiments of the present disclosure, the timing advance adjustment method further comprises:

[0018] The user equipment determines whether the user equipment is allowed to report the user timing advance auxiliary information according to predefined information, or high layer signaling configuration information, or downlink control information indication, or medium access control layer control unit indication.

[0019] In some embodiments of the present disclosure, the user equipment reporting the user timing advance auxiliary information to the base station comprises:

[0020] The user equipment reports the user timing advance auxiliary information to the base station at a predetermined period; or,

[0021] The user equipment reports the user timing advance auxiliary information to the base station in response to triggering of a trigger event.

[0022] In some embodiments of the present disclosure, the predetermined period is predefined, or configured by high layer signaling, or indicated by downlink control information, or indicated by a medium access control layer control element.

[0023] In some embodiments of the present disclosure, the trigger event includes at least one of the following events:

[0024] indicated by downlink control information;

[0025] configured by high layer signaling;

[0026] indicated by a medium access control layer control element;

[0027] the user equipment detects that a scheduling conflict occurs;

[0028] the user equipment needs to report a timing advance;

[0029] the satellite assistance information obtained by the user equipment is expired;

[0030] the difference between the current actual timing advance value of the user equipment and the last reported timing advance value to the base station is greater than or equal to a first threshold value;

[0031] In the case where the timing advance threshold value is configured by high layer signaling or indicated by downlink control information, the user equipment has not reported a timing advance value or user timing advance assistance information to the base station before.

[0032] In some embodiments of the present disclosure, the user equipment reporting user timing advance assistance information to the base station includes:

[0033] reporting the user timing advance assistance information to the base station by using a newly added medium access control layer control element for assistance timing advance reporting; or

[0034] reporting the user timing advance assistance information to the base station by using a newly added user timing advance assistance information parameter in a specified medium access control layer control element for assistance timing advance reporting.

[0035] In some embodiments of the present disclosure, the user equipment reporting user timing advance assistance information to the base station includes:

[0036] in the case where the user timing advance assistance information reporting is triggered or reaches a user timing advance assistance information reporting period, determining whether there is an uplink shared channel resource available for new transmission, and whether the uplink shared channel resource can accommodate a newly added medium access control layer control element for assistance timing advance reporting, or a medium access control layer control element for assistance timing advance reporting which increases the user timing advance assistance information reporting message and the subheader of the control element;

[0037] In the case that there is uplink shared channel resource available for new transmission, and the uplink shared channel resource can accommodate the media access control layer control element of the added auxiliary timing advance report, or the media access control layer control element of the auxiliary timing advance report of the increased user timing advance auxiliary information reporting message, and the subheader of the control element, the corresponding user timing advance auxiliary information is sent on the uplink shared channel resource.

[0038] According to another aspect of the present disclosure, a timing advance adjustment method for a non-terrestrial network is provided, comprising:

[0039] The base station receives the reported user timing advance auxiliary information of the user equipment, wherein the user equipment is a reduced capability user equipment.

[0040] The base station updates the timing advance value according to the user timing advance auxiliary information.

[0041] The base station performs scheduling according to the updated timing advance value.

[0042] In some embodiments of the present disclosure, the timing advance adjustment method further comprises:

[0043] The base station sends the updated timing advance value to the user equipment.

[0044] In some embodiments of the present disclosure, the timing advance adjustment method further comprises:

[0045] The base station sends first information to the user equipment, wherein the first information is used to indicate whether the user equipment is allowed to report timing advance auxiliary information.

[0046] In some embodiments of the present disclosure, the base station sending first information to the user equipment comprises:

[0047] The base station sends the first information to the user equipment in a high layer signaling configuration manner, or a downlink control information indication manner, or a media access control layer control element indication manner, or an implicit indication manner.

[0048] In some embodiments of the present disclosure, the base station sending the first information to the user equipment in a high layer signaling configuration manner comprises:

[0049] The base station sends the first information to the user equipment through the high layer signaling of the newly added auxiliary timing advance non-terrestrial network configuration, wherein the high layer signaling of the newly added auxiliary timing advance non-terrestrial network configuration comprises the first information, and the first information is a user timing advance auxiliary information reporting capability indication; or

[0050] The base station sends the first information to the user equipment through a non-terrestrial network configuration list with an added auxiliary timing advance in a non-terrestrial network configuration higher layer signaling specified by the base station, wherein the non-terrestrial network configuration list with the added auxiliary timing advance includes the first information; or

[0051] The base station sends the first information to the user equipment through an added auxiliary timing advance reporting capability parameter in a specified configuration list of a non-terrestrial network configuration higher layer signaling specified by the base station, wherein the added auxiliary timing advance reporting capability parameter includes the first information.

[0052] In some embodiments of the present disclosure, the base station sends the first information to the user equipment in a downlink control information indication manner includes:

[0053] The base station sends the first information to the user equipment through an added downlink control information format, wherein the message content of the added downlink control information format includes the first information, and the first information includes at least one of a user timing advance auxiliary information reporting capability indication and a user timing advance auxiliary information time-frequency resource, the user timing advance auxiliary information reporting capability indication is used to indicate whether the user equipment is allowed to report timing advance auxiliary information, and the user timing advance auxiliary information time-frequency resource is used to indicate the time-frequency resource position occupied by the user timing advance auxiliary information reporting; or

[0054] The base station sends the first information to the user equipment through a newly added message field in a specified downlink control information, wherein the content of the newly added message field includes the first information.

[0055] In some embodiments of the present disclosure, the base station sends the first information to the user equipment in a medium access control layer control element indication manner includes:

[0056] The base station sends the first information to the user equipment through an added medium access control layer control element, wherein the message content of the added downlink control information format includes the first information, and the first information includes at least one of a user timing advance auxiliary information reporting capability indication and a user timing advance auxiliary information time-frequency resource, the user timing advance auxiliary information reporting capability indication is used to indicate whether the user equipment is allowed to report timing advance auxiliary information, and the user timing advance auxiliary information time-frequency resource is used to indicate the time-frequency resource position occupied by the user timing advance auxiliary information reporting; or

[0057] The base station sends the first information to the user equipment through an added message content in a timing advance command of a medium access control layer control element, wherein the added message content includes the first information.

[0058] In some embodiments of the present disclosure, the base station sends the first information to the user equipment in an implicit indication manner, comprising:

[0059] In the case that the user timing advance assistance information reporting time-frequency resource, or the user timing advance assistance information reporting period is configured, or the user timing advance assistance information reporting trigger event indicated by the downlink control information or the media access control layer control unit occurs, the user equipment is implicitly indicated to be allowed to report the timing advance assistance information.

[0060] In some embodiments of the present disclosure, the timing advance adjustment method further comprises:

[0061] The base station sends the second information to the user equipment, wherein the second information is used to indicate the user timing advance assistance information reporting period.

[0062] In some embodiments of the present disclosure, the base station sends the second information to the user equipment, comprising:

[0063] The base station sends the second information to the user equipment in a high layer signaling configuration manner, or a downlink control information indication manner, or a media access control layer control unit indication manner.

[0064] In some embodiments of the present disclosure, the base station sends the second information to the user equipment in a high layer signaling configuration manner, comprising:

[0065] The base station sends the second information to the user equipment through the newly added auxiliary timing advance non-terrestrial network configuration high layer signaling, wherein the newly added auxiliary timing advance non-terrestrial network configuration high layer signaling comprises the second information, and the second information is the user timing advance assistance information reporting period; or

[0066] The base station sends the second information to the user equipment through the auxiliary timing advance non-terrestrial network configuration list added in the specified non-terrestrial network configuration high layer signaling, wherein the added auxiliary timing advance non-terrestrial network configuration list comprises the second information; or

[0067] The base station sends the second information to the user equipment through the auxiliary timing advance reporting period parameter added in the specified configuration list of the specified non-terrestrial network configuration high layer signaling, wherein the added auxiliary timing advance reporting period parameter comprises the second information.

[0068] In some embodiments of the present disclosure, the base station sends the second information to the user equipment in a downlink control information indication manner, comprising:

[0069] The base station sends the second information to the user equipment through a newly added downlink control information format, wherein the message content of the newly added downlink control information format includes the second information, and the second information is a user timing advance auxiliary information reporting period; or

[0070] The base station sends the second information to the user equipment through a newly added message field in the downlink control information, wherein the content of the newly added message field includes the second information.

[0071] In some embodiments of the present disclosure, the base station sends the second information to the user equipment in a media access control layer control element indication manner, comprising:

[0072] The base station sends the second information to the user equipment through a newly added media access control layer control element, wherein the message content of the newly added downlink control information format includes the second information, and the second information is a user timing advance auxiliary information reporting period; or

[0073] The base station sends the second information to the user equipment through a newly added message content in the timing advance command of the media access control layer control element, wherein the newly added message content includes the second information.

[0074] In some embodiments of the present disclosure, the timing advance adjustment method further comprises:

[0075] The base station sends a triggering event to the user equipment to trigger the user equipment to report user timing advance auxiliary information to the base station.

[0076] In some embodiments of the present disclosure, the base station sends a triggering event to the user equipment, comprising:

[0077] The base station sends a triggering event to the user equipment in a high layer signaling configuration manner, or a downlink control information indication manner, or a media access control layer control element indication manner.

[0078] In some embodiments of the present disclosure, the base station sends a triggering event to the user equipment in a high layer signaling configuration manner, comprising:

[0079] The base station sends the triggering event to the user equipment through a newly added auxiliary timing advance non-terrestrial network configuration high layer signaling, wherein the newly added auxiliary timing advance non-terrestrial network configuration high layer signaling includes the triggering event, and the triggering event is a user timing advance auxiliary information reporting indication; or

[0080] The base station sends the triggering event to the user equipment through a newly added auxiliary timing advance non-terrestrial network configuration list in the non-terrestrial network configuration high layer signaling, wherein the newly added auxiliary timing advance non-terrestrial network configuration list includes the triggering event; or

[0081] The base station sends the trigger event to the user equipment by adding an auxiliary timing advance reporting parameter in a specified configuration list of non-ground network configuration high layer signaling, wherein the added auxiliary timing advance reporting parameter includes the trigger event.

[0082] In some embodiments of the present disclosure, the base station sends the trigger event to the user equipment in a downlink control information indication manner, including:

[0083] The base station sends the trigger event to the user equipment by adding a new downlink control information format, wherein the message content of the added downlink control information format includes the trigger event, and the trigger event is a user timing advance auxiliary information reporting indication; or

[0084] The base station sends the trigger event to the user equipment by adding a new message field in a specified downlink control information, wherein the content of the added message field includes the trigger event.

[0085] In some embodiments of the present disclosure, the base station sends the trigger event to the user equipment in a medium access control layer control element indication manner, including:

[0086] The base station sends the trigger event to the user equipment by adding a new medium access control layer control element, wherein the message content of the added downlink control information format includes the trigger event, and the trigger event is a user timing advance auxiliary information reporting indication; or

[0087] The base station sends the trigger event to the user equipment by adding a new message content in a timing advance command of a specified medium access control layer control element, wherein the added message content includes the trigger event.

[0088] In some embodiments of the present disclosure, the base station sends the updated timing advance value to the user equipment, including:

[0089] The base station sends the updated timing advance value to the user equipment through a timing advance command of a medium access control layer control element.

[0090] In some embodiments of the present disclosure, in the case that the user timing advance auxiliary information includes a change rate of the timing advance amount between the user equipment and the satellite, the base station updates the timing advance value according to the user timing advance auxiliary information, including:

[0091] According to the user timing advance auxiliary information, the change rate of the timing advance amount between the user equipment and the satellite is determined.

[0092] According to the timing advance value reported by the user equipment last time and the change rate of the timing advance, the timing advance between the user equipment and the satellite at the current time is calculated.

[0093] The timing advance value is updated according to the timing advance between the user equipment and the satellite at the current time.

[0094] In some embodiments of the present disclosure, when the user timing advance assistance information includes the user position or the current cell identifier of the user equipment, the base station updating the timing advance value according to the user timing advance assistance information includes:

[0095] The current position of the user equipment is determined according to the user timing advance assistance information.

[0096] The round-trip transmission delay between the user equipment and the satellite is determined according to the current position of the user equipment.

[0097] The timing advance between the user equipment and the satellite at the current time is determined according to the round-trip transmission delay between the user equipment and the satellite.

[0098] The timing advance value is updated according to the timing advance between the user equipment and the satellite at the current time.

[0099] In some embodiments of the present disclosure, when the user timing advance assistance information includes the moving speed, the moving acceleration and the moving direction, the base station updating the timing advance value according to the user timing advance assistance information includes:

[0100] The position change of the user equipment is determined according to the user timing advance assistance information.

[0101] The change rate of the round-trip transmission delay between the user and the satellite is determined according to the position change of the user equipment.

[0102] The timing advance between the user equipment and the satellite at the current time is determined according to the timing advance value reported by the user equipment last time and the change rate of the round-trip transmission delay.

[0103] The timing advance value is updated according to the timing advance between the user equipment and the satellite at the current time.

[0104] In some embodiments of the present disclosure, when the user timing advance assistance information includes whether there is a scheduling conflict occurring in the time interval between the reporting of the last user timing advance assistance information and the reporting of the current user timing advance assistance information, the base station updating the timing advance value according to the user timing advance assistance information includes:

[0105] In a case where scheduling conflict occurs in a time interval between previous user timing advance assistance information reporting and current user timing advance assistance information reporting, the timing advance value is updated to a maximum value of the timing advance value at the current time point.

[0106] The timing advance value is updated according to the timing advance between the user equipment and the satellite at the current time point.

[0107] According to another aspect of the present disclosure, a user equipment is provided, comprising:

[0108] An assistance information sending module configured to report user timing advance assistance information to a base station, wherein the user timing advance assistance information is used for the base station to update a timing advance value according to the user timing advance assistance information and to perform scheduling according to the updated timing advance value, and the user equipment is a reduced capability user equipment.

[0109] According to another aspect of the present disclosure, a user equipment is provided, comprising:

[0110] A memory configured to store instructions;

[0111] A processor configured to execute the instructions, so that the user equipment performs the timing advance adjustment method according to any one of the above embodiments.

[0112] According to another aspect of the present disclosure, a base station is provided, comprising:

[0113] An assistance information receiving module configured to receive user timing advance assistance information reported by a user equipment, wherein the user equipment is a reduced capability user equipment;

[0114] A timing advance updating module configured to update a timing advance value according to the user timing advance assistance information;

[0115] A scheduling module configured to perform scheduling according to the updated timing advance value.

[0116] According to another aspect of the present disclosure, a base station is provided, comprising:

[0117] A memory configured to store instructions;

[0118] A processor configured to execute the instructions, so that the base station performs the timing advance adjustment method according to any one of the above embodiments.

[0119] According to another aspect of the present disclosure, a non-terrestrial network is provided, comprising the base station according to any one of the above embodiments.

[0120] In accordance with another aspect of the present disclosure, there is provided a timing advance adjustment system for a non-terrestrial network, comprising a user equipment as described in any of the preceding embodiments, and a base station as described in any of the preceding embodiments.

[0121] In accordance with another aspect of the present disclosure, there is provided a computer readable storage medium, wherein the computer readable storage medium stores computer instructions, which when executed by a processor, implement the timing advance adjustment method as described in any of the preceding embodiments.

[0122] In accordance with another aspect of the present disclosure, there is provided a computer program product comprising a computer program, wherein the computer program, when executed by a processor, implements the timing advance adjustment method as described in any of the preceding embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0123] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure or the prior art, the drawings required to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0124] FIG. 1 is a schematic diagram of the difference between the actual TA used by the user and the TA value known by the base station according to the user report, which leads to the conflict between the base station scheduling and the user transmission.

[0125] FIG. 2 is a schematic diagram of some embodiments of the timing advance adjustment method for a non-terrestrial network according to the present disclosure.

[0126] FIG. 3 is a schematic diagram of the newly added MAC CE message in some embodiments of the present disclosure.

[0127] FIG. 4 is a schematic diagram of the Timing Advance Report MAC CE message format after adding new message content in some embodiments of the present disclosure.

[0128] FIG. 5 is a schematic diagram of another embodiment of the timing advance adjustment method for a non-terrestrial network according to the present disclosure.

[0129] FIG. 6 is a schematic diagram of still another embodiment of the timing advance adjustment method for a non-terrestrial network according to the present disclosure.

[0130] FIG. 7 is a schematic diagram of the high layer signaling message format of NTN-Config-Assistant TA in some embodiments of the present disclosure.

[0131] FIG. 8 is a schematic diagram of the high layer signaling format of NTN-Config-Assistant TA list in some embodiments of the present disclosure.

[0132] FIG. 9 is a schematic diagram of a high layer signaling format of new parameter content in some embodiments of the present disclosure.

[0133] FIG. 10 is a schematic diagram of a new MAC CE message format in some embodiments of the present disclosure.

[0134] FIG. 11 is a schematic diagram of a Timing Advance Command MAC CE format after adding new message content in some embodiments of the present disclosure.

[0135] FIG. 12 is a schematic diagram of a high layer signaling message format for indicating a user TA assistance information reporting period in some embodiments of the present disclosure.

[0136] FIG. 13 is a schematic diagram of an NTN-Config-Assistant TA list for indicating a user TA assistance information reporting period in some embodiments of the present disclosure.

[0137] FIG. 14 is a schematic diagram of new parameter content for indicating a user TA assistance information reporting period in some embodiments of the present disclosure.

[0138] FIG. 15 is a schematic diagram of a new MAC CE message format for indicating a user TA assistance information reporting period in some embodiments of the present disclosure.

[0139] FIG. 16 is a schematic diagram of a Timing Advance Command MAC CE format after adding new message content for indicating a user TA assistance information reporting period in some embodiments of the present disclosure.

[0140] FIG. 17 is a schematic diagram of a new high layer signaling for indicating that a user needs to perform TA assistance information reporting in some embodiments of the present disclosure.

[0141] FIG. 18 is a schematic diagram of a new NTN-Config-Assistant TA list high layer signaling for indicating that a user needs to perform TA assistance information reporting in some embodiments of the present disclosure.

[0142] FIG. 19 is a schematic diagram of new parameter content high layer signaling for indicating that a user needs to perform TA assistance information reporting in some embodiments of the present disclosure.

[0143] FIG. 20 is a schematic diagram of a new MAC CE message format for indicating that a user needs to perform TA assistance information reporting in some embodiments of the present disclosure.

[0144] FIG. 21 is a schematic diagram of a Timing Advance Command MAC CE format after adding new message content for indicating that a user needs to perform TA assistance information reporting in some embodiments of the present disclosure.

[0145] FIG. 22 is a schematic diagram of some embodiments of a user equipment of the present disclosure.

[0146] FIG. 23 is a schematic diagram of the structure of some embodiments of a user equipment of the present disclosure.

[0147] FIG. 24 is a schematic diagram of some embodiments of a base station of the present disclosure.

[0148] FIG. 25 is a schematic diagram of the structure of some embodiments of a base station of the present disclosure.

[0149] FIG. 26 is a schematic diagram of a method of adjusting timing advance in some embodiments of the present disclosure.

[0150] FIG. 27 is a schematic diagram of high layer signaling in some embodiments of the present disclosure.

[0151] FIG. 28 is a schematic diagram of downlink control information in some embodiments of the present disclosure.

[0152] FIG. 29 is a schematic diagram of reporting information using MAC CE in some embodiments of the present disclosure. DETAILED DESCRIPTION

[0153] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, but not all the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and not intended to limit the present disclosure and its applications or uses in any way. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort fall within the scope of the present disclosure.

[0154] Unless otherwise specifically stated, the relative arrangements of the components and steps, numerical expressions, and values shown in these embodiments do not limit the scope of the present disclosure.

[0155] It should be understood that the sizes of the various portions shown in the drawings are not necessarily drawn to scale for ease of description.

[0156] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail in order to avoid obscuring the present disclosure. However, appropriate details should be considered part of the present disclosure when appropriate.

[0157] In all the examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation. Thus, other examples of the example embodiments can have different values.

[0158] It should be noted that like reference numerals and letters refer to like items throughout the accompanying drawings, and once an item is defined in one drawing, further discussion of the same item is unnecessary in subsequent drawings.

[0159] FIG. 1 is a schematic diagram of a user's actual TA and a difference between a TA value obtained by a base station according to a user's report, causing a conflict between the base station scheduling and the user transmission. As shown in FIG. 1, when the user equipment type is RedCap, a difference between the actual TA value of the user side and the TA value of the user obtained by the base station according to the user's TA-report can cause a conflict in the base station scheduling.

[0160] The inventors have found that the related art conflict processing is designed only for ground network features, and the above conflict is regarded as an "Error case", which completely relies on the correct scheduling of the base station to avoid the conflict, and the user side does not process. However, in the satellite communication scenario, the TA difference between the base station and the user is difficult to avoid, and it becomes very difficult to completely rely on the base station scheduling to avoid the conflict. The related art has no solution to this problem.

[0161] In view of at least one of the above technical problems, the present disclosure provides a timing advance adjustment method and system, a base station, a user equipment and a non-terrestrial network, by reporting user TA assistance information, adjusting the TA value obtained by the network side, so as to avoid the conflict in the base station scheduling.

[0162] FIG. 2 is a schematic diagram of some embodiments of a timing advance adjustment method of a non-terrestrial network of the present disclosure. Preferably, the embodiments can be executed by a timing advance adjustment system of a non-terrestrial network (NTN) of the present disclosure or a user equipment of the present disclosure. The method can include step 21.

[0163] Step 21, a user equipment (UE) reports user timing advance assistance information to a base station, wherein the user timing advance assistance information is used for the base station to update a timing advance value according to the user timing advance assistance information, and the base station schedules according to the updated timing advance value, and the user equipment is a reduced capability user equipment.

[0164] In some embodiments of the present disclosure, step 21 can include: in a case where the user equipment is allowed to report the timing advance assistance information, the user equipment reports the user timing advance assistance information to the base station.

[0165] In some embodiments of the present disclosure, the timing advance adjustment method can further include: the user equipment determines whether the user equipment is allowed to report the user timing advance assistance information according to pre-defined information, or high layer signaling configuration information, or downlink control information indication, or medium access control layer control element (MAC CE) indication.

[0166] In some embodiments of the present disclosure, after step 21, the timing advance adjustment method can further comprise: the network side device (base station) processing the received user TA assistance information.

[0167] In some embodiments of the present disclosure, the network side device processing the received user TA assistance information specifically comprises: after the network side receives the TA assistance information reported by the user equipment, updating the T TA , scheduling according to the updated TA value, and issuing the updated TA value to the user equipment.

[0168] In some embodiments of the present disclosure, the user timing advance assistance information comprises at least one of the following information.

[0169] 1. The drifting rate of the timing advance between the user equipment and the satellite, i.e., the drifting rate of UE_specific TA.

[0170] 2. The position of the user equipment, wherein the position of the user equipment can be represented by at least one of the following: latitude and longitude coordinates, or coordinates in the Earth coordinate system.

[0171] 3. The current cell ID of the user equipment, wherein the current cell ID of the user equipment can be represented by at least one of the following: cell ID, or network cell ID, or global cell ID, or satellite coverage area ID.

[0172] 4. The moving speed, moving acceleration and moving direction of the user equipment.

[0173] 5. Whether there is a scheduling conflict within the time interval between the reporting of the previous user timing advance assistance information and the reporting of the current user timing advance assistance information.

[0174] In some embodiments of the present disclosure, step 21 can comprise at least one of step 211 and step 212.

[0175] Step 211: The user equipment reports the user timing advance assistance information to the base station at a predetermined period.

[0176] In some embodiments of the present disclosure, the predetermined period can be predefined, or configured by higher layer signaling, or indicated by downlink control information, or indicated by the medium access control layer control unit.

[0177] Step 212: In response to the triggering of a triggering event, the user equipment reports the user timing advance assistance information to the base station.

[0178] In some embodiments of the present disclosure, the triggering event can comprise at least one of the following events.

[0179] 1. Downlink control information indication.

[0180] 2. High layer signaling configuration.

[0181] 3. Medium access control layer control element (MAC CE) indication.

[0182] 4. User equipment detects scheduling conflict. In the case that the user equipment detects conflict (Collision), trigger timing advance report (TA report).

[0183] 5. User equipment needs to perform timing advance report (Timing Advance report).

[0184] 6. Satellite assistance information (ntn-UlSyncValidityDuration) obtained by the user equipment expires.

[0185] 7. The difference between the current actual timing advance value of the user equipment and the last reported timing advance value to the base station is greater than or equal to a first threshold value.

[0186] In some embodiments of the present disclosure, the first threshold value is an integer, in units of slot / symbol / frame / ms.

[0187] In some embodiments of the present disclosure, the first threshold value is equal to the value of offsetThresholdTA in the related technical standard.

[0188] 8. In the case that the timing advance threshold value (i.e. offsetThresholdTA) is configured by high layer signaling or indicated by downlink control information, the user equipment has not previously reported the timing advance value or user timing advance assistance information to the base station.

[0189] In some embodiments of the present disclosure, step 21 can include at least one of steps 213 to 215.

[0190] Step 213, in the case that the user timing advance assistance information reporting is triggered or the user timing advance assistance information reporting period is reached, determine whether there is uplink shared channel (UL-SCH) resource available for new transmission, and whether the uplink shared channel resource can accommodate the added assistant timing advance report medium access control layer control element (Assistant Timing Advance Report MAC CE), or the assistant timing advance report medium access control layer control element (Timing Advance Report MAC CE) that increases the user timing advance assistance information reporting message and the subheader of the control element.

[0191] Step 214, in the case that there is uplink shared channel resource available for new transmission, and the uplink shared channel resource can accommodate the newly added media access control layer control element of auxiliary timing advance report, or the media access control layer control element of auxiliary timing advance report of increased user timing advance auxiliary information reporting message, and the subheader of the control element, the corresponding user timing advance auxiliary information is sent on the uplink shared channel resource.

[0192] Step 215, otherwise, in the case that the condition of having uplink shared channel resource available for new transmission, and the uplink shared channel resource can accommodate the newly added media access control layer control element of auxiliary timing advance report, or the media access control layer control element of auxiliary timing advance report of increased user timing advance auxiliary information reporting message, and the subheader of the control element is not met, the uplink resource application is triggered, and step 213 is executed again.

[0193] In the above-mentioned embodiments of the present disclosure, the event triggering priority is the highest, and the periodic reporting is the second.

[0194] In the above-mentioned embodiments of the present disclosure, there is resource direct sending, and there is resource application first.

[0195] In some embodiments of the present disclosure, step 21 can include at least one of step 216 or step 217.

[0196] Step 216, using the newly added media access control layer control element of auxiliary timing advance report, the user timing advance auxiliary information is reported to the base station.

[0197] In some embodiments of the present disclosure, step 216 can include: adding an Assistant Timing Advance Report MAC CE for reporting user TA auxiliary information.

[0198] In some embodiments of the present disclosure, the content of the newly added MAC CE message includes at least one of the following: the change rate of UE_specific TA; the user position, which can be represented by at least one of the latitude and longitude coordinates or the coordinates in the earth coordinate system; the current cell ID of the user, which can be represented by at least one of the cell identifier, the network cell identifier, the global cell identifier, or the satellite coverage area identifier; the user moving speed, moving acceleration, moving direction; whether there is scheduling conflict within the time interval between the previous information reporting and the current user TA auxiliary information reporting.

[0199] FIG. 3 is a schematic diagram of a new MAC CE message in some embodiments of the present disclosure. As shown in FIG. 3, the user TA assistance information reporting indication field has a first length. The first length is an integer bit value. Preferably, the first length can be 2 bits, 6 bits, or 8 bits.

[0200] Step 217, using the newly added user timing advance assistance information parameter in the media access control layer control unit designated for assistance timing advance reporting, to report the user timing advance assistance information to the base station.

[0201] In some embodiments of the present disclosure, step 217 can include adding a user TA assistance information parameter in the existing Timing Advance Report MAC CE for reporting user TA assistance information.

[0202] In some embodiments of the present disclosure, the newly added user TA assistance information parameter content includes at least one of the following: a change rate of UE-specific TA; a user location, which can be represented by at least one of latitude and longitude coordinates or earth coordinate system coordinates; a user current cell ID, which can be represented by at least one of a cell identifier, a network cell identifier, a global cell identifier, or a satellite coverage area identifier; a user moving speed, moving acceleration, and moving direction; and whether there is a scheduling conflict within the time interval between the previous information reporting and the current user TA assistance information reporting.

[0203] FIG. 4 is a schematic diagram of the Timing Advance Report MAC CE message format after adding new message content in some embodiments of the present disclosure. As shown in FIG. 4, R is a reserved bit, occupying 2 bits and being set to 0. The TA field has a length of 14 bits. The user TA assistance information field has a length of an integer bit value. Preferably, the first length can be 2 bits, 6 bits, or 8 bits.

[0204] In some embodiments of the present disclosure, as shown in FIG. 2, the timing advance adjustment method can further include step 22.

[0205] Step 22, the user equipment receives the updated timing advance value issued by the base station.

[0206] The above embodiments of the present disclosure are designed for user TA assistance information structure and configuration method and configuration process.

[0207] The above-mentioned embodiments of the present disclosure propose a new Redcap-oriented TA adjustment method. When there is a difference between the actual TA value of the user side, especially the UE_specific TA value, and the TA value known by the base station according to the TA value reported by the user, the TA value known by the network side is adjusted through the user TA auxiliary information reporting, thereby avoiding base station scheduling conflicts and providing support for satellite communication applications supporting HD-FDD (Half-duplex Frequency Division Duplexing) RedCap.

[0208] FIG. 5 is a schematic diagram of another embodiment of the timing advance adjustment method of the non-terrestrial network of the present disclosure. Preferably, the present embodiment can be executed by the non-terrestrial network of the present disclosure or the timing advance adjustment system of the non-terrestrial network of the present disclosure or the base station (such as gNB) of the present disclosure. The method comprises at least one of steps 51 to 53.

[0209] Step 51, the base station receives the reported user timing advance auxiliary information of the user equipment, wherein the user equipment is a reduced capability user equipment.

[0210] In some embodiments of the present disclosure, the user timing advance auxiliary information comprises at least one of the following information.

[0211] 1. The rate of change of the timing advance between the user equipment and the satellite, i.e. the rate of change of UE_specific TA.

[0212] 2. The user equipment position, wherein the user equipment position can be represented by at least one of the following: latitude and longitude coordinates, or coordinates in the Earth Coordinate System.

[0213] 3. The current cell ID of the user equipment, wherein the current cell ID of the user equipment can be represented by at least one of the following: cell ID, or network cell ID, or global cell ID, or satellite coverage area ID.

[0214] 4. The moving speed, moving acceleration and moving direction of the user equipment.

[0215] 5. Whether there is a scheduling conflict within the time interval between the previous user timing advance auxiliary information reporting and the current user timing advance auxiliary information reporting.

[0216] Step 52, the base station updates the timing advance value according to the user timing advance auxiliary information.

[0217] In some embodiments of the present disclosure, in the case where the user timing advance auxiliary information comprises the rate of change of the timing advance between the user equipment and the satellite, step 52 can comprise at least one of steps 520 to 522.

[0218] Step 520, determining the rate of change R of the timing advance amount UE_specific TA between the user equipment and the satellite according to the user timing advance auxiliary information TA .

[0219] Step 521, calculating the timing advance amount between the user equipment and the satellite at the current time (current UE_specific TA value T TA ) according to the last user equipment reported timing advance value and the rate of change R of the timing advance amount .

[0220] In some embodiments of the present disclosure, step 521 can include determining the current UE_specific TA value T

[0221] In formula (1), T represents the last user equipment reported UE_specific TA value, T duration represents the time difference between the last user equipment reported time and the time when the scheduling demand occurs in the base station.

[0222] Step 522, updating the timing advance value T according to the timing advance amount between the user equipment and the satellite at the current time T TA .

[0223] In some embodiments of the present disclosure, step 522 can include updating the timing advance value T TA according to formula (2).

[0224] In formula (2), T c represents the sampling time interval unit, N TA is the TA value indicated by the network equipment through the PAR (signal peak-to-average ratio), N TA,offset is the timing offset value after the frame alignment of the DL (downlink) and UL (uplink) at the uplink time synchronization reference point (RP), including the common timing offset value broadcast by the network equipment.

[0225] In some embodiments of the present disclosure, in the case that the user timing advance auxiliary information includes the user location or the current cell identifier of the user equipment, step 52 can include at least one of steps 523 to 525.

[0226] Step 523, determining the current location of the user equipment according to the user timing advance auxiliary information; determining the round-trip transmission delay T STT between the user equipment and the satellite according to the current location of the user equipment.

[0227] Step 524, determining the timing advance amount between the user equipment and the satellite at the current time (the current UE_specific TA value STT ) according to the round-trip transmission delay T between the user equipment and the satellite.

[0228] Step 525, updating the timing advance value T according to the timing advance amount between the user equipment and the satellite at the current time TA .

[0229] In some embodiments of the present disclosure, step 525 can comprise updating the timing advance value T TA according to formula (2).

[0230] In some embodiments of the present disclosure, when the user timing advance assistance information comprises the moving speed, the moving acceleration and the moving direction, step 52 can comprise at least one of steps 526 to 528.

[0231] Step 526, determining the user equipment position change according to the user timing advance assistance information; determining the rate of change R RTT of the round-trip transmission delay between the user and the satellite according to the user equipment position change.

[0232] Step 527, determining the timing advance amount between the user equipment and the satellite at the current time according to the timing advance value reported by the user equipment last time and the rate of change of the round-trip transmission delay.

[0233] In some embodiments of the present disclosure, step 527 can comprise calculating the current UE_specific TA value RTT according to the TA value reported by the user last time and R

[0234] In formula (3), T last represents the UE_specific TA value reported by the user last time, T duration represents the time difference between the time reported by the user last time and the time when the base station has a scheduling demand.

[0235] Step 528, updating the timing advance value T according to the timing advance amount between the user equipment and the satellite at the current time TA .

[0236] In some embodiments of this disclosure, if there is a scheduling conflict within the time interval between the previous user time advance assistance information report and the current user time advance assistance information report, step 52 may include at least one of steps 52a to 52b.

[0237] Step 52a: If a scheduling conflict occurs within the time interval between the previous user time advance auxiliary information report and the current user time advance auxiliary information report, adjust the timing advance between the user equipment and the satellite at the current moment. Updated to the maximum value TA of the timing advance value. max .

[0238] In some embodiments of this disclosure, TA max The value setting must meet at least one of the following requirements: greater than or equal to the UE_specific TA value of the satellite serving cell edge user; or greater than or equal to the offsetThresholdTA value defined in the relevant technical standards.

[0239] In some embodiments of this disclosure, TA max It can be predefined, configured by higher-level signaling, indicated by downlink control information, or indicated by MAC-CE.

[0240] Step 52b: Based on the timing advance between the user equipment and the satellite at the current moment. Update timing advance value T TA .

[0241] In some embodiments of this disclosure, if there is a scheduling conflict within the time interval between the previous user time advance assistance information report and the current user time advance assistance information report, step 52 may include at least one of steps 52c to 52d.

[0242] Step 52c: If no scheduling conflict occurred within the time interval between the previous information report and the current information report, then based on the user's reported information, it is determined that no scheduling conflict occurred within the time interval between the previous information report and the current information report, and it is assumed that the TA value actually used by the current user is... constant.

[0243] Step 52d, keep T TA The value remains unchanged.

[0244] Step 53: The base station performs scheduling based on the updated timing advance value.

[0245] In some embodiments of this disclosure, as shown in FIG5, the timing advance adjustment method may further include step 54.

[0246] Step 54, the base station sends the updated timing advance value to the user equipment.

[0247] In some embodiments of the present disclosure, step 54 can include: the base station sends the updated timing advance value T TA to the user equipment through a timing advance command (Timing Advance Command MAC CE) of a medium access control layer control unit.

[0248] In the above embodiments of the present disclosure, when the user timing advance assistance information includes the rate of change of the timing advance between the user equipment and the satellite, includes the user location or the current cell identifier of the user equipment, includes the moving speed, the moving acceleration and the moving direction, and includes the four cases of whether there is a scheduling conflict within the time interval between the previous reporting of the user timing advance assistance information and the current reporting of the user timing advance assistance information, four different ways are respectively used to calculate the timing advance between the user equipment and the satellite at the current time, and the timing advance value T is updated according to the timing advance between the user equipment and the satellite at the current time. TA .

[0249] In any of the above embodiments of the present disclosure, if the user timing advance assistance information includes at least two of the above four information combinations, a random calculation method corresponding to one of the included information combinations is used to calculate the timing advance between the user equipment and the satellite at the current time, and the timing advance value T is updated according to the timing advance between the user equipment and the satellite at the current time. TA .

[0250] FIG. 6 is a schematic diagram of still another embodiment of the timing advance adjustment method of the non-terrestrial network of the present disclosure. Preferably, the present embodiment can be executed by the non-terrestrial network of the present disclosure, or the timing advance adjustment system of the non-terrestrial network of the present disclosure, or the base station (such as gNB) of the present disclosure. In addition to at least one step in the embodiments of FIG. 2 and FIG. 5, the timing advance adjustment method of the non-terrestrial network of the present disclosure can also include at least one of steps 61 to 63 in the embodiment of FIG. 6.

[0251] Step 61, the base station sends first information to the user equipment, wherein the first information is used to indicate whether the user equipment is allowed to report the timing advance assistance information.

[0252] In some embodiments of the present disclosure, step 61 can include: configuration of whether the user equipment is allowed to report the TA assistance information (by the base station to the user equipment).

[0253] In some embodiments of the present disclosure, step 61 can include that the base station sends the first information to the user equipment in a high layer signaling configuration mode, or a downlink control information indication mode, or a medium access control layer control unit indication mode, or an implicit indication mode.

[0254] In some embodiments of the present disclosure, in step 61, the step of the base station sending the first information to the user equipment in a high layer signaling configuration mode can include at least one of steps 610 to 612.

[0255] In step 610, the base station sends the first information to the user equipment through an added non-terrestrial network configuration high layer signaling (NTN-Config-Assistant TA), wherein the added non-terrestrial network configuration high layer signaling includes the first information, and the first information is a user timing advance assistance information reporting capability indication.

[0256] In some embodiments of the present disclosure, in step 610, a new high layer signaling NTN-Config-Assistant TA is added, which is used to indicate whether the user is allowed to report TA assistance information. The NTN-Config-Assistant TA message content includes a user TA assistance information reporting capability indication (assistant ta-Report ability), which is used to indicate whether the user is allowed to report TA assistance information. FIG. 7 is a schematic diagram of the high layer signaling message format of NTN-Config-Assistant TA in some embodiments of the present disclosure.

[0257] In step 611, the base station sends the first information to the user equipment through an added non-terrestrial network configuration list (NTN-Config-Assistant TA list) in a specified non-terrestrial network configuration high layer signaling (NTN-Config), wherein the added non-terrestrial network configuration list includes the first information.

[0258] In some embodiments of the present disclosure, in step 611, an NTN-Config-Assistant TA list is added in the existing high-layer signaling NTN-Config, which is used to indicate whether the user is allowed to report TA assistance information. The newly added list content includes: user TA assistance information reporting capability indication assistant ta-Report ability: used to indicate whether the user is allowed to report TA assistance information. FIG. 8 is a schematic diagram of the high-layer signaling format of the NTN-Config-Assistant TA list in some embodiments of the present disclosure. In FIG. 8, the NTN-Config-r17 list is the existing high-layer signaling configuration list.

[0259] In step 612, the base station sends the first information to the user equipment by adding an assistant TA reporting capability (assistant ta-Report ability) parameter in the specified configuration list (NTN-Config-r17 list) of the specified non-terrestrial network configuration high-layer signaling (NTN-Config), wherein the added assistant TA reporting capability parameter includes the first information.

[0260] In some embodiments of the present disclosure, in step 612, an assistant ta-Report ability parameter is added in the NTN-Config-r17 list of the existing high-layer signaling NTN-Config, which is used to indicate whether the user is allowed to report TA assistance information. The newly added parameter content includes: user TA assistance information reporting capability indication (assistant ta-Report ability): used to indicate whether the user is allowed to report TA assistance information. FIG. 9 is a schematic diagram of the high-layer signaling format of the newly added parameter content in some embodiments of the present disclosure.

[0261] In some embodiments of the present disclosure, in step 61, the step of sending the first information to the user equipment by the base station in a downlink control information indication manner can include at least one of steps 613 to 614.

[0262] In step 613, the base station sends the first information to the user equipment by a newly added downlink control information format, wherein the message content of the newly added downlink control information format includes the first information, and the first information includes at least one of a user TA assistance information reporting capability indication and a user TA assistance information time-frequency resource. The user TA assistance information reporting capability indication is used to indicate whether the user equipment is allowed to report TA assistance information, and the user TA assistance information time-frequency resource is used to indicate the time-frequency resource position occupied by the user TA assistance information reporting.

[0263] In some embodiments of the present disclosure, step 613 can include adding a new DCI (Downlink Control Information) format for indicating whether the user is allowed to report TA assistance information. The DCI format message content includes at least one of the following: user TA assistance information reporting capability indication, using Boolean type data, for indicating whether the user is allowed to report TA assistance information; and user TA assistance information reporting time-frequency resource, for indicating the time-frequency resource position occupied by the user TA assistance information reporting.

[0264] Step 614, the base station sends the first information to the user equipment through the newly added message field in the downlink control information, wherein the content of the newly added message field includes the first information.

[0265] In some embodiments of the present disclosure, step 614 can include adding a message field in the existing downlink control information DCI for indicating whether the user is allowed to report TA assistance information. The newly added field content includes at least one of the following: user TA assistance information reporting capability indication, using Boolean type data, for indicating whether the user is allowed to report TA assistance information; and user TA assistance information reporting time-frequency resource, for indicating the time-frequency resource position occupied by the user TA assistance information reporting.

[0266] In some embodiments of the present disclosure, in step 61, the step of the base station sending the first information to the user equipment in the media access control layer control unit indication mode can include at least one of steps 615 to 616.

[0267] Step 615, the base station sends the first information to the user equipment through the newly added media access control layer control unit, wherein the message content of the newly added downlink control information format includes the first information, and the first information includes at least one of user timing advance assistance information reporting capability indication and user timing advance assistance information time-frequency resource, the user timing advance assistance information reporting capability indication is used to indicate whether the user equipment is allowed to report timing advance assistance information, and the user timing advance assistance information time-frequency resource is used to indicate the time-frequency resource position occupied by the user timing advance assistance information reporting.

[0268] In some embodiments of the present disclosure, step 615 can include adding a new MAC (Medium Access Control) layer CE (Control Element) for indicating whether the user is allowed to report TA assistance information. The new MAC CE message content includes at least one of the following: a user TA assistance information reporting capability indication for indicating whether the user is allowed to report TA assistance information; and a user TA assistance information reporting time-frequency resource for indicating a time-frequency resource position occupied by the user TA assistance information reporting.

[0269] FIG. 10 is a schematic diagram of a new MAC CE message format in some embodiments of the present disclosure. As shown in FIG. 10, TAG is a Timing Advance Group, and TAG Identity (TAG ID) represents an identity for addressing the TAG, occupying 2 bits. The new MAC CE message of the present disclosure can include at least one of a user TA assistance information reporting capability field and a user TA assistance information reporting time-frequency resource field. The user TA assistance information reporting capability field has a first length. The user TA assistance information reporting time-frequency resource field has a second length. The first and second lengths are integer bit values. Preferably, the first length is 1 bit, and the second length is 6 bits.

[0270] In step 616, the base station sends the first information to the user equipment through a new message content added in a Timing Advance Command MAC CE.

[0271] In some embodiments of the present disclosure, step 616 can include adding a new message content in an existing Timing Advance Command MAC CE for indicating whether the user is allowed to report TA assistance information. The new message content includes at least one of the following: a user TA assistance information reporting capability indication for indicating whether the user is allowed to report TA assistance information; and a user TA assistance information reporting time-frequency resource for indicating a time-frequency resource position occupied by the user TA assistance information reporting.

[0272] FIG. 11 is a schematic diagram of a Timing Advance Command MAC CE format after adding new message content in some embodiments of the present disclosure. As shown in FIG. 11, TAG Identity (TAG ID) represents the identity of the addressed TAG, occupying 2 bits. Timing Advance Command represents the index value for the timing adjustment amount, occupying 6 bits. The newly added message content in the present disclosure can include at least one of a user TA assistance information reporting capability field and a user TA assistance information reporting time-frequency resource field. The user TA assistance information reporting capability field has a first length. The user TA assistance information reporting time-frequency resource field has a second length. The first and second lengths are integer bit values. Preferably, the first length is 6 bits, and the second length is 6 bits.

[0273] In some embodiments of the present disclosure, in step 61, the step of the base station sending the first information to the user equipment in an implicit indication manner can include: implicitly indicating that the user equipment is allowed to perform timing advance assistance information reporting in the case that the user timing advance assistance information reporting time-frequency resource or the user timing advance assistance information reporting period is configured in the downlink control information or the medium access control layer control element, or the user timing advance assistance information reporting trigger event indicated by the downlink control information or the medium access control layer control element occurs.

[0274] In step 62, the base station sends the second information to the user equipment, wherein the second information is used to indicate the user timing advance assistance information reporting period.

[0275] In some embodiments of the present disclosure, step 62 can include: configuration of the user TA assistance information reporting period (by the base station to the user equipment).

[0276] In some embodiments of the present disclosure, step 62 can include: the base station sending the second information to the user equipment in a high layer signaling configuration manner, or a downlink control information indication manner, or a medium access control layer control element indication manner.

[0277] In some embodiments of the present disclosure, in step 62, the step of the base station sending the second information to the user equipment in a high layer signaling configuration manner can include at least one of steps 620 to 622.

[0278] In step 620, the base station sends the second information to the user equipment through newly added non-terrestrial network configuration high layer signaling of assistance timing advance, wherein the newly added non-terrestrial network configuration high layer signaling of assistance timing advance includes the second information, and the second information is the user timing advance assistance information reporting period.

[0279] In some embodiments of the present disclosure, step 620 can include adding a high-layer signaling NTN-Config-Assistant TA for indicating a user TA assistance information reporting period. The NTN-Config-Assistant TA message content includes a user TA assistance information reporting period (assistant ta-Report duration) for indicating a user TA assistance information reporting period, in any or a combination of units of symbol, slot, frame, ms, s, or min. FIG. 12 is a schematic diagram of a high-layer signaling message format for indicating a user TA assistance information reporting period in some embodiments of the present disclosure.

[0280] Step 621, the base station sends the second information to the user equipment through an added assistant timing advance non-terrestrial network configuration list (NTN-Config-Assistant TA list) in the specified non-terrestrial network configuration high-layer signaling, wherein the added assistant timing advance non-terrestrial network configuration list includes the second information.

[0281] In some embodiments of the present disclosure, step 621 can include adding an NTN-Config-Assistant TA list in the existing high-layer signaling NTN-Config for indicating whether the user is allowed to report TA assistance information. The added list content includes a user TA assistance information reporting period (assistant ta-Report duration) for indicating a user TA assistance information reporting period, in any or a combination of units of symbol, slot, frame, ms, s, or min. FIG. 13 is a schematic diagram of an NTN-Config-Assistant TA list for indicating a user TA assistance information reporting period in some embodiments of the present disclosure.

[0282] Step 622, the base station sends the second information to the user equipment through an added assistant timing advance reporting period (assistant ta-Report duration) parameter in the specified configuration list of the specified non-terrestrial network configuration high-layer signaling, wherein the added assistant timing advance reporting period parameter includes the second information.

[0283] In some embodiments of the present disclosure, step 622 can include adding an assistant ta-Report duration parameter in the NTN-Config-r17 list of the existing high-layer signaling NTN-Config to indicate whether the user is allowed to report TA assistance information. The newly added parameter content includes: user TA assistance information reporting period (assistant ta-Report duration), which is used to indicate the user TA assistance information reporting period, and the unit is any one or combination of symbol, slot, frame, ms, s, or min. FIG. 14 is a schematic diagram of the newly added parameter content for indicating the user TA assistance information reporting period in some embodiments of the present disclosure.

[0284] In some embodiments of the present disclosure, in step 62, the step of sending the second information to the user equipment by the base station in a downlink control information indication manner can include at least one of steps 623 to 624.

[0285] Step 623, the base station sends the second information to the user equipment through a newly added downlink control information format, wherein the message content of the newly added downlink control information format includes the second information, and the second information is the user timing advance assistance information reporting period.

[0286] In some embodiments of the present disclosure, step 623 can include adding a downlink control information DCI format to indicate the user TA assistance information reporting period. The DCI format message content includes: user TA assistance information reporting period, which is used to indicate the user TA assistance information reporting period, and the unit is any one or combination of symbol (signal), slot (time slot), frame (frame), ms (millisecond), s (second), or min (minute).

[0287] Step 624, the base station sends the second information to the user equipment through a newly added message field in the specified downlink control information, wherein the content of the newly added message field includes the second information.

[0288] In some embodiments of the present disclosure, step 624 can include adding a message field in the existing downlink control information DCI to indicate the user TA assistance information reporting period. The newly added field content includes: user TA assistance information reporting period, which is used to indicate the user TA assistance information reporting period, and the unit is any one or combination of symbol, slot, frame, ms, s, or min.

[0289] In some embodiments of the present disclosure, in step 62, the step of sending the second information to the user equipment by the base station in the manner of the media access control layer control unit indication can include at least one of steps 625 to 626.

[0290] In step 625, the base station sends the second information to the user equipment through the newly added media access control layer control unit, wherein the message content of the newly added downlink control information format includes the second information, and the second information is a user timing advance auxiliary information reporting period.

[0291] In some embodiments of the present disclosure, step 625 can include adding a new MAC CE for indicating the user TA auxiliary information reporting period. The message content of the new MAC CE can include the user TA auxiliary information reporting period for indicating the user TA auxiliary information reporting period, in any one or combination of symbol, slot, frame, ms, s, min. FIG. 15 is a schematic diagram of the message format of the new MAC CE for indicating the user TA auxiliary information reporting period in some embodiments of the present disclosure. In FIG. 15, TAG Identity (TAG ID) represents the identity of addressing TAG, occupying 2 bits. The length of the user TA auxiliary information reporting period field is a first length. The first length is an integer bit value. Preferably, the first length is 6 bits.

[0292] In step 626, the base station sends the second information to the user equipment through the newly added message content in the timing advance command of the specified media access control layer control unit, wherein the newly added message content includes the second information.

[0293] In some embodiments of the present disclosure, step 626 can include adding message content in the existing Timing Advance Command MAC CE for indicating the user TA auxiliary information reporting period. The newly added message content can include the user TA auxiliary information reporting period for indicating the user TA auxiliary information reporting period, in any one or combination of symbol, slot, frame, ms, s, min. FIG. 16 is a schematic diagram of the Timing Advance Command MAC CE format after adding the new message content for indicating the user TA auxiliary information reporting period in some embodiments of the present disclosure. In FIG. 16, TAG Identity (TAG ID) represents the identity of addressing TAG, occupying 2 bits. Timing Advance Command represents the index value for timing adjustment amount, occupying 6 bits. The length of the user TA auxiliary information reporting period field is a first length. The first length is an integer bit value. Preferably, the first length is 6 bits.

[0294] In step 63, the base station sends a triggering event to the user equipment to trigger the user equipment to report the user timing advance assistance information to the base station.

[0295] In some embodiments of the present disclosure, step 63 can include a user TA assistance information reporting triggering event.

[0296] In some embodiments of the present disclosure, step 63 can include that the base station sends the triggering event to the user equipment in a high layer signaling configuration manner, or in a downlink control information indication manner, or in a medium access control layer control unit indication manner.

[0297] In some embodiments of the present disclosure, in step 63, the base station sends the triggering event to the user equipment in the downlink control information indication manner can include at least one of steps 630 to 631.

[0298] In step 630, the base station sends the triggering event to the user equipment through a newly added downlink control information format, wherein the message content of the newly added downlink control information format includes the triggering event, and the triggering event is a user timing advance assistance information reporting indication.

[0299] In some embodiments of the present disclosure, step 630 can include adding a downlink control information DCI format as one of the user TA assistance information reporting triggering events. When the downlink control information is issued, the user is triggered to report the TA assistance information. The DCI format message content includes a user TA assistance information reporting indication, which is used to indicate that the user needs to report the TA assistance information.

[0300] In step 631, the base station sends the triggering event to the user equipment through a newly added message field in the specified downlink control information, wherein the content of the newly added message field includes the triggering event.

[0301] In some embodiments of the present disclosure, step 631 can include adding a message field in the existing downlink control information DCI to indicate one of the user TA assistance information reporting triggering events. When the downlink control information is issued, the user is triggered to report the TA assistance information. The newly added field content includes a user TA assistance information reporting indication, which is used to indicate that the user needs to report the TA assistance information.

[0302] In some embodiments of the present disclosure, in step 63, the base station sends the triggering event to the user equipment in the high layer signaling configuration manner can include at least one of steps 632 to 634.

[0303] At step 632, the base station sends the triggering event to the user equipment through newly added high layer signaling of non-terrestrial network configuration with assistant timing advance, wherein the newly added high layer signaling of non-terrestrial network configuration with assistant timing advance includes the triggering event, and the triggering event is an indication of user timing advance assistant information reporting.

[0304] In some embodiments of the present disclosure, step 632 can include adding a high layer signaling NTN-Config-Assistant TA for indicating one of the triggering events of user TA assistant information reporting. When the high layer signaling is issued, the user is triggered to report TA assistant information. The NTN-Config-Assistant TA message content includes an indication of user TA assistant information reporting assistant ta-Report for indicating that the user needs to report TA assistant information. FIG. 17 is a schematic diagram of the newly added high layer signaling for indicating that the user needs to report TA assistant information in some embodiments of the present disclosure.

[0305] At step 633, the base station sends the triggering event to the user equipment through an added list of non-terrestrial network configurations with assistant timing advance in the specified high layer signaling of non-terrestrial network configuration, wherein the added list of non-terrestrial network configurations with assistant timing advance includes the triggering event.

[0306] In some embodiments of the present disclosure, step 633 can include adding an NTN-Config-Assistant TA list in the existing high layer signaling NTN-Config for indicating one of the triggering events of user TA assistant information reporting. When the NTN-Config message is issued, the user is triggered to report TA assistant information. The added list content includes an indication of user TA assistant information reporting (assistant ta-Report) for indicating that the user needs to report TA assistant information. FIG. 18 is a schematic diagram of the newly added high layer signaling of NTN-Config-Assistant TA list for indicating that the user needs to report TA assistant information in some embodiments of the present disclosure.

[0307] At step 634, the base station sends the triggering event to the user equipment through an added assistant timing advance reporting parameter in the specified configuration list of the specified high layer signaling of non-terrestrial network configuration, wherein the added assistant timing advance reporting parameter includes the triggering event.

[0308] In some embodiments of the present disclosure, step 634 can include adding an assistant ta-Report parameter in an NTN-Config-r17 list of an existing high-layer signaling NTN-Config to indicate one of the user TA assistance information reporting trigger events. When the NTN-Config message is issued, the user is triggered to report TA assistance information. The newly added parameter content includes a user TA assistance information reporting indication (assistant ta-Report) to indicate that the user needs to report TA assistance information. FIG. 19 is a schematic diagram of high-layer signaling for indicating that the user needs to report TA assistance information in some embodiments of the present disclosure.

[0309] In some embodiments of the present disclosure, in step 63, the step of sending the trigger event to the user equipment by the base station in a medium access control layer control unit indication manner can include at least one of steps 635 to 636.

[0310] Step 635, the base station sends the trigger event to the user equipment through a newly added medium access control layer control unit, wherein the message content of the newly added downlink control information format includes the trigger event, and the trigger event is a user timing advance assistance information reporting indication.

[0311] In some embodiments of the present disclosure, step 635 can include adding a new MAC CE to indicate one of the user TA assistance information reporting trigger events. When the MAC CE is issued, the user is triggered to report TA assistance information. The newly added MAC CE message content includes a user TA assistance information reporting indication to indicate that the user needs to report TA assistance information. FIG. 20 is a schematic diagram of a newly added MAC CE message format for indicating that the user needs to report TA assistance information in some embodiments of the present disclosure. As shown in FIG. 20, TAG Identity (TAG ID) represents the identity of addressing TAG, occupying 2 bits. The user TA assistance information reporting indication field has a first length. The first length is an integer bit value. Preferably, the first length is 1 bit.

[0312] Step 636, the base station sends the trigger event to the user equipment through newly added message content in a timing advance command of a specified medium access control layer control unit, wherein the newly added message content includes the trigger event.

[0313] In some embodiments of the present disclosure, step 636 can include adding message content in an existing Timing Advance Command MAC CE for indicating one of the user TA assistance information reporting trigger events. When the MAC CE is issued, the user is triggered to report TA assistance information. The newly added message content includes a user TA assistance information reporting indication for indicating that the user needs to report TA assistance information. FIG. 21 is a schematic diagram of the format of the Timing Advance Command MAC CE after adding new message content for indicating that the user needs to report TA assistance information in some embodiments of the present disclosure. As shown in FIG. 21, the TAG Identity (TAG ID) represents the identity of the addressed TAG, occupying 2 bits. The Timing Advance Command represents an index value for the timing adjustment amount, occupying 6 bits. The user TA assistance information reporting indication field has a first length. The first length is an integer bit value. Preferably, the first length is 6 bits.

[0314] The related art defines the collision between the uplink and downlink transmission dynamically scheduled by the base station and the collision between the uplink and downlink transmission semi-statically configured as an "Error case", completely relies on the correct scheduling of the base station to avoid the conflict, and the user side does not process. However, in the satellite communication scenario, the difference between the actual TA used by the user and the TA value known by the base station according to the TA reported by the user is difficult to avoid, and it becomes very difficult to completely rely on the scheduling of the base station to avoid the conflict. However, there is currently no solution to this problem.

[0315] The above-mentioned embodiments of the present disclosure design a new TA adjustment method for NTN Redcap, which can avoid the uplink and downlink scheduling conflict of the HD-FDD RedCap device in the satellite communication process through the user information TA assistance reporting and network side reporting information processing design.

[0316] FIG. 22 is a schematic diagram of some embodiments of the user equipment of the present disclosure. As shown in FIG. 22, the user equipment of the present disclosure can include an assistance information sending module 71.

[0317] The assistance information sending module 71 is configured to report user timing advance assistance information to a base station, wherein the user timing advance assistance information is used for the base station to update a timing advance value according to the user timing advance assistance information and to schedule according to the updated timing advance value, and the user equipment is a reduced capability user equipment.

[0318] In some embodiments of the present disclosure, as shown in FIG. 22, the user equipment of the present disclosure can further include a timing advance receiving module 72.

[0319] The timing advance receiving module 72 is configured to receive the updated timing advance value sent by the base station.

[0320] In some embodiments of the present disclosure, the user equipment can be configured to perform the timing advance adjustment method described in any of the above embodiments of the present disclosure (for example, any of the embodiments of FIG. 2 to FIG. 4).

[0321] The present disclosure can adjust the TA value obtained by the network side through the reporting of the user TA assistance information, thereby avoiding the scheduling conflict of the base station.

[0322] FIG. 23 is a structural schematic diagram of some embodiments of the user equipment of the present disclosure. As shown in FIG. 23, the user equipment includes a memory 11 and a processor 12.

[0323] The memory 11 is configured to store instructions, and the processor 12 is coupled to the memory 11 and configured to perform the timing advance adjustment method as described in any of the above embodiments (for example, any of the embodiments of FIG. 2 to FIG. 4) based on the instructions stored in the memory.

[0324] As shown in FIG. 23, the user equipment further includes a communication interface 13 for information interaction with other devices. Meanwhile, the user equipment further includes a bus 14, and the processor 12, the communication interface 13, and the memory 11 complete communication with each other through the bus 14.

[0325] The memory 11 can include a high-speed RAM memory, and can further include a non-volatile memory, for example, at least one disk memory. The memory 11 can also be a memory array. The memory 11 can also be divided into blocks, and the blocks can be combined into a virtual volume according to a certain rule.

[0326] In addition, the processor 12 can be a central processing unit CPU, or can be an application specific integrated circuit ASIC, or one or more integrated circuits configured to implement embodiments of the present disclosure.

[0327] FIG. 24 is a schematic diagram of some embodiments of the base station of the present disclosure. As shown in FIG. 24, the base station of the present disclosure can include an assistance information receiving module 81, a timing advance updating module 82, and a scheduling module 83.

[0328] The assistance information receiving module 81 is configured to receive the user timing advance assistance information reported by the user equipment, wherein the user equipment is a user equipment with reduced capability.

[0329] The timing advance updating module 82 is configured to update the timing advance value according to the user timing advance assistance information.

[0330] The scheduling module 83 is configured to perform scheduling according to the updated timing advance value.

[0331] In some embodiments of the present disclosure, as shown in FIG. 24, the base station of the present disclosure can further include a timing advance sending module 84.

[0332] The timing advance sending module 84 is configured to send the updated timing advance value to the user equipment.

[0333] In some embodiments of the present disclosure, the base station can be configured to perform the timing advance adjustment method described in any of the above embodiments of the present disclosure (e.g., any of the embodiments of FIG. 5 to FIG. 21).

[0334] FIG. 25 is a structural schematic diagram of yet some embodiments of the base station of the present disclosure. The base station of FIG. 25 is similar or identical to the structure and function of FIG. 23. The difference between FIG. 25 and FIG. 23 is that, in FIG. 25, the processor 12 is configured to perform the timing advance adjustment method as described in any of the above embodiments (e.g., any of the embodiments of FIG. 5 to FIG. 21) based on the instructions stored in the memory.

[0335] According to another aspect of the present disclosure, there is provided a non-terrestrial network comprising a base station as described in any of the above embodiments.

[0336] According to another aspect of the present disclosure, there is provided a timing advance adjustment system of a non-terrestrial network comprising a user equipment as described in any of the above embodiments, and a base station as described in any of the above embodiments.

[0337] According to another aspect of the present disclosure, there is provided a computer program product comprising a computer program, wherein the computer program, when executed by a processor, implements the timing advance adjustment method as described in any of the above embodiments.

[0338] According to another aspect of the present disclosure, there is provided a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the instructions, when executed by a processor, implement the timing advance adjustment method as described in any of the above embodiments.

[0339] In some embodiments of the present disclosure, the computer-readable storage medium can be a non-transitory computer-readable storage medium.

[0340] The present disclosure will be described below through specific embodiments.

[0341] FIG. 26 is a schematic diagram of a timing advance adjustment method in some embodiments of the present disclosure. As shown in FIG. 2, it is assumed that in the initial stage, the UE_specific TA value actually used by the user equipment and the UE_specific TA value known by the base station according to the user report are both TA1. The user equipment is configured to allow TA assistance information reporting by high layer signaling indication, and the user TA assistance information reporting is triggered by an event (downlink control information indication). Both the user equipment and the satellite are in a moving process.

[0342] FIG. 27 is a schematic diagram of high layer signaling in some embodiments of the present disclosure. When the user receives the high layer signaling as shown in FIG. 27, it is determined that the user is allowed to report TA assistance information.

[0343] FIG. 28 is a schematic diagram of downlink control information in some embodiments of the present disclosure. When the user receives the downlink control information as shown in FIG. 28, i.e., the user TA assistance information reporting indication = 1, the user information reporting is triggered.

[0344] FIG. 29 is a schematic diagram of MAC CE reporting information in some embodiments of the present disclosure. The user reports the current latitude and longitude coordinates (x1, y1) by MAC CE as shown in FIG. 29.

[0345] After the base station receives the information reported by the user, the satellite orbit height h and the current satellite mapping to the ground latitude and longitude coordinates (x2, y2) are obtained according to the satellite ephemeris. The round-trip transmission delay between the user and the satellite is calculated using formula (4):

[0346] In formula (4), c is the speed of light.

[0347] The base station updates the UE_specific TA value T STT is updated using formula (2). TA .

[0348] As shown in FIG. 26, when the base station has scheduling requirements, scheduling operations are performed according to the updated TA value, the scheduling result is updated, and the interval between the uplink and downlink data of the scheduling is ensured to be greater than TA. The base station sends the updated T TA to the user equipment through Timing Advance Command MAC CE.

[0349] The above embodiments of the present disclosure provide a timing advance adjustment method for NTN Redcap. The above embodiments of the present disclosure provide a method for scheduling conflict resolution and its sub-solutions, which can be used to avoid uplink and downlink scheduling conflicts of HD-FDD RedCap devices in satellite communication.

[0350] The above-mentioned embodiments of the disclosure support NTN Redcap application, and can avoid uplink and downlink scheduling conflicts of the HD-FDD RedCap device in the satellite communication process.

[0351] The above-mentioned embodiments of the disclosure improve the redcap system capacity through the user information TA auxiliary reporting and network side reporting information processing design.

[0352] For the NTN scenario, the TA adjustment method for NTN Redcap designed by the above-mentioned embodiments of the disclosure can avoid scheduling conflicts of the HD-FDD RedCap device in the satellite communication process, and effectively improve the performance of the redcap system in the NTN scenario.

[0353] The above-mentioned embodiments of the disclosure can support the redcap application in the NTN scenario, avoid scheduling conflicts of the HD-FDD RedCap device in the satellite communication process, and improve the performance of the NTN redcap system.

[0354] Those skilled in the art will understand that the embodiments of the disclosure can be provided as a method, device, or computer program product. Therefore, the disclosure can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the disclosure can take the form of a computer program product implemented on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROMs, optical storage, etc.) containing computer-usable program code.

[0355] The disclosure is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the disclosure. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as combinations of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing apparatus to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing apparatus produce the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0356] These computer program instructions can also be stored in a computer-readable memory that can direct the computer or other programmable data processing apparatus to work in a specific manner, so that the instructions stored in the computer-readable memory produce a product including instruction means, which implements the functions specified in one or more flows in the flowcharts and / or one or more blocks in the block diagrams.

[0357] These computer program instructions can 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 block or blocks and / or blocks in the block diagram.

[0358] The non-terrestrial network, base station, timing advance adjustment system, user equipment, assistance information receiving module, timing advance updating module, scheduling module, timing advance sending module, base station, assistance information sending module and timing advance receiving module described above can be implemented as a general purpose processor, a programmable logic controller (PLC), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any appropriate combination thereof for performing the functions described in the present application.

[0359] So far, the present disclosure has been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0360] Those skilled in the art can understand that all or part of the steps of the above-mentioned embodiments can be completed by hardware, or by a program instructing relevant hardware, and the program can be stored in a non-transitory computer-readable storage medium, which can be a read-only memory, a magnetic disk or an optical disk.

[0361] The description of the present disclosure is given for the purpose of illustration and description, and is not exhaustive or limiting to the present disclosure. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are chosen and described in order to best explain the principles of the present disclosure and its practical application, and to enable others skilled in the art to understand the present disclosure in order to design various embodiments with various modifications for specific use.

Claims

1. A method for timing advance adjustment of a non-terrestrial network, comprising: reporting, by a user equipment, user timing advance assistance information to a base station, wherein the user timing advance assistance information is used for the base station to update a timing advance value based on the user timing advance assistance information and to schedule based on the updated timing advance value, and the user equipment is a reduced capability user equipment. 2.The method of claim 1, further comprising: receiving, by the user equipment, the updated timing advance value from the base station.

3. The timing advance adjustment method of claim 1 or 2, wherein, reporting, by the user equipment, the user timing advance assistance information to the base station comprises: reporting, by the user equipment, the user timing advance assistance information to the base station, if the user equipment is allowed to report the user timing advance assistance information.

4. The timing advance adjustment method of any one of claims 1 to 3, wherein, the user timing advance assistance information comprises at least one of: a rate of change of a timing advance between the user equipment and a satellite; a location of the user equipment; a current cell identity of the user equipment; a moving speed, a moving acceleration and a moving direction of the user equipment; whether a scheduling conflict occurs within a time interval between a previous reporting of the user timing advance assistance information and a current reporting of the user timing advance assistance information. 5.The method of any one of claims 1 to 4, further comprising: determining, by the user equipment, whether the user equipment is allowed to report the user timing advance assistance information based on predefined information, or higher layer signaling configuration information, or a downlink control information indication, or a medium access control control element indication.

6. The timing advance adjustment method of any one of claims 1 to 5, wherein, reporting, by the user equipment, the user timing advance assistance information to the base station comprises: reporting, by the user equipment, the user timing advance assistance information to the base station with a predefined period; or reporting, by the user equipment, the user timing advance assistance information to the base station in response to a trigger of a trigger event. 7.The method of claim 6, wherein: the predefined period is predefined, or configured by higher layer signaling, or indicated by a downlink control information, or indicated by a medium access control control element.

8. The timing advance adjustment method of claim 6 or 7, wherein, the trigger event comprises at least one of: a downlink control information indication; a higher layer signaling configuration; a medium access control control element indication; the user equipment detects a scheduling conflict; the user equipment needs to report a timing advance; satellite assistance information obtained by the user equipment is expired; a difference between a current actual timing advance value of the user equipment and a last reported timing advance value to the base station is greater than or equal to a first threshold value; the user equipment has not reported a timing advance value or the user timing advance assistance information to the base station before, if a timing advance threshold value is configured by a higher layer signaling or indicated by a downlink control information.

9. The timing advance adjustment method of any one of claims 1 to 8, wherein, reporting, by the user equipment, the user timing advance assistance information to the base station comprises: reporting, by the user equipment, the user timing advance assistance information to the base station using a newly added medium access control control element for assistance timing advance reporting; or reporting, by the user equipment, the user timing advance assistance information to the base station using a newly added user timing advance assistance information parameter in a designated medium access control control element for assistance timing advance reporting.

10. The timing advance adjustment method of any one of claims 1 to 9, wherein, reporting, by the user equipment, the user timing advance assistance information to the base station comprises: In a case that the user timing advance assistance information reporting is triggered or reaches the user timing advance assistance information reporting period, it is determined whether there is uplink shared channel resource available for new transmission, and whether the uplink shared channel resource can accommodate the newly added assistance timing advance report of the media access control layer control element or the assistance timing advance report of the media access control layer control element of the user timing advance assistance information reporting message. In a case that there is uplink shared channel resource available for new transmission, and the uplink shared channel resource can accommodate the newly added assistance timing advance report of the media access control layer control element or the assistance timing advance report of the media access control layer control element of the user timing advance assistance information reporting message, and the subheader of the control element, the corresponding user timing advance assistance information is sent on the uplink shared channel resource.

11. The timing advance adjustment method of any one of claims 6-10, wherein: the predetermined period is a user timing advance assistance information reporting period, wherein the user timing advance assistance information reporting period is used to indicate a user timing advance assistance information reporting period, and the user timing advance assistance information reporting period is in units of any one or a combination of at least two of a signal, a time slot, a frame, a millisecond, a second, and a minute.

12. The timing advance adjustment method of any one of claims 8-11, wherein: the first threshold value is an integer, and the first threshold value is in units of any one or a combination of at least two of a signal, a time slot, a frame, and a millisecond; the first threshold value has a value equal to that of a timing advance threshold value offsetThresholdTA.

13. A timing advance adjustment method for a non-terrestrial network, comprising: receiving, by a base station, reported user timing advance assistance information of a user equipment, wherein the user equipment is a reduced capability user equipment; updating, by the base station, a timing advance value according to the user timing advance assistance information; scheduling, by the base station, according to the updated timing advance value.

14. The timing advance adjustment method of claim 13, further comprising: downloading, by the base station, the updated timing advance value to the user equipment.

15. The timing advance adjustment method of claim 13 or 14, further comprising: sending, by the base station, first information to the user equipment, wherein the first information is used to indicate whether the user equipment is allowed to perform timing advance assistance information reporting.

16. The timing advance adjustment method of claim 15, wherein, The base station sending the first information to the user equipment comprises: the base station sending the first information to the user equipment in a high layer signaling configuration manner, or a downlink control information indication manner, or a media access control layer control element indication manner, or an implicit indication manner.

17. The timing advance adjustment method of claim 16, wherein, The base station sending the first information to the user equipment in the high layer signaling configuration manner comprises: The base station sends the first information to the user equipment through newly added non-terrestrial network configuration high layer signaling of auxiliary timing advance, wherein the newly added non-terrestrial network configuration high layer signaling of auxiliary timing advance comprises the first information, and the first information is a user timing advance auxiliary information reporting capability indication; or The base station sends the first information to the user equipment through a newly added auxiliary timing advance non-terrestrial network configuration list in specified non-terrestrial network configuration high layer signaling, wherein the newly added auxiliary timing advance non-terrestrial network configuration list comprises the first information; or The base station sends the first information to the user equipment through a newly added auxiliary timing advance reporting capability parameter in a specified configuration list of specified non-terrestrial network configuration high layer signaling, wherein the newly added auxiliary timing advance reporting capability parameter comprises the first information.

18. The timing advance adjustment method of claim 16 or 17, wherein, The base station sends the first information to the user equipment in a downlink control information indication mode, comprising: The base station sends the first information to the user equipment through a newly added downlink control information format, wherein the message content of the newly added downlink control information format comprises the first information, and the first information comprises at least one of a user timing advance auxiliary information reporting capability indication and user timing advance auxiliary information time-frequency resources, the user timing advance auxiliary information reporting capability indication is used to indicate whether the user equipment is allowed to report timing advance auxiliary information, and the user timing advance auxiliary information time-frequency resources are used to indicate the time-frequency resource position occupied by the user timing advance auxiliary information reporting; or The base station sends the first information to the user equipment through a newly added message field in specified downlink control information, wherein the content of the newly added message field comprises the first information.

19. The timing advance adjustment method of any one of claims 16 to 18, wherein, The base station sends the first information to the user equipment in a medium access control layer control element indication mode, comprising: The base station sends the first information to the user equipment through a newly added medium access control layer control element, wherein the message content of the newly added downlink control information format comprises the first information, and the first information comprises at least one of a user timing advance auxiliary information reporting capability indication and user timing advance auxiliary information time-frequency resources, the user timing advance auxiliary information reporting capability indication is used to indicate whether the user equipment is allowed to report timing advance auxiliary information, and the user timing advance auxiliary information time-frequency resources are used to indicate the time-frequency resource position occupied by the user timing advance auxiliary information reporting; or The base station sends the first information to the user equipment through newly added message content in a timing advance command of a specified medium access control layer control element, wherein the newly added message content comprises the first information.

20. The timing advance adjustment method of any one of claims 16-19, wherein, The base station sends the first information to the user equipment in an implicit indication mode, comprising: In a case that a time-frequency resource for reporting user timing advance assistance information in a downlink control information or a medium access control control element, or a reporting period of user timing advance assistance information is configured, or a reporting trigger event of user timing advance assistance information indicated by a downlink control information or a medium access control control element occurs, the user equipment is implicitly indicated to be allowed to report the timing advance assistance information.

21. The timing advance adjustment method of any one of claims 13-20, further comprising: sending, by the base station, second information to the user equipment, wherein the second information is used to indicate a reporting period of user timing advance assistance information.

22. The timing advance adjustment method of claim 21, wherein, The sending, by the base station, of the second information to the user equipment comprises: The sending, by the base station, of the second information to the user equipment in a high layer signaling configuration manner, a downlink control information indication manner, or a medium access control control element indication manner.

23. The timing advance adjustment method of claim 22, wherein, The sending, by the base station, of the second information to the user equipment in the high layer signaling configuration manner comprises: The sending, by the base station, of the second information to the user equipment through newly added high layer signaling of a non-terrestrial network for assisting timing advance, wherein the newly added high layer signaling of the non-terrestrial network for assisting timing advance comprises the second information, and the second information is a reporting period of user timing advance assistance information; or The sending, by the base station, of the second information to the user equipment through a newly added non-terrestrial network configuration list of a non-terrestrial network for assisting timing advance in a specified high layer signaling of a non-terrestrial network, wherein the newly added non-terrestrial network configuration list of the non-terrestrial network for assisting timing advance comprises the second information; or The sending, by the base station, of the second information to the user equipment through a newly added reporting period parameter of user timing advance assistance information in a specified configuration list of a specified high layer signaling of a non-terrestrial network, wherein the newly added reporting period parameter of user timing advance assistance information comprises the second information.

24. The timing advance adjustment method of claim 22 or 23, wherein, The sending, by the base station, of the second information to the user equipment in the downlink control information indication manner comprises: The sending, by the base station, of the second information to the user equipment through a newly added downlink control information format, wherein a message content of the newly added downlink control information format comprises the second information, and the second information is a reporting period of user timing advance assistance information; or The sending, by the base station, of the second information to the user equipment through a newly added message field in a specified downlink control information, wherein a content of the newly added message field comprises the second information.

25. The timing advance adjustment method of any one of claims 22-24, wherein, The sending, by the base station, of the second information to the user equipment in the medium access control control element indication manner comprises: The sending, by the base station, of the second information to the user equipment through a newly added medium access control control element, wherein a message content of the newly added downlink control information format comprises the second information, and the second information is a reporting period of user timing advance assistance information; or The sending, by the base station, of the second information to the user equipment through a newly added message content in a timing advance command of a specified medium access control control element, wherein the newly added message content comprises the second information.

26. The timing advance adjustment method of any one of claims 13-25, further comprising: The base station sends a triggering event to the user equipment to trigger the user equipment to report user timing advance auxiliary information to the base station.

27. The timing advance adjustment method of claim 25, wherein, The base station sends the triggering event to the user equipment includes: The base station sends the triggering event to the user equipment in a high layer signaling configuration mode, or a downlink control information indication mode, or a medium access control layer control element indication mode.

28. The timing advance adjustment method of claim 27, wherein, The base station sends the triggering event to the user equipment in the high layer signaling configuration mode includes: The base station sends the triggering event to the user equipment through newly added auxiliary timing advance non-terrestrial network configuration high layer signaling, wherein the newly added auxiliary timing advance non-terrestrial network configuration high layer signaling includes the triggering event, and the triggering event is a user timing advance auxiliary information reporting indication; or The base station sends the triggering event to the user equipment through an auxiliary timing advance non-terrestrial network configuration list added in a specified non-terrestrial network configuration high layer signaling, wherein the auxiliary timing advance non-terrestrial network configuration list includes the triggering event; or The base station sends the triggering event to the user equipment through an auxiliary timing advance reporting parameter added in a specified configuration list of the specified non-terrestrial network configuration high layer signaling, wherein the auxiliary timing advance reporting parameter includes the triggering event.

29. The timing advance adjustment method of claim 27 or 28, wherein, The base station sends the triggering event to the user equipment in the downlink control information indication mode includes: The base station sends the triggering event to the user equipment through a newly added downlink control information format, wherein a message content of the newly added downlink control information format includes the triggering event, and the triggering event is a user timing advance auxiliary information reporting indication; or The base station sends the triggering event to the user equipment through a newly added message field in the specified downlink control information, wherein a content of the newly added message field includes the triggering event.

30. The timing advance adjustment method of any one of claims 27-29, wherein, The base station sends the triggering event to the user equipment in the medium access control layer control element indication mode includes: The base station sends the triggering event to the user equipment through a newly added medium access control layer control element, wherein a message content of the newly added downlink control information format includes the triggering event, and the triggering event is a user timing advance auxiliary information reporting indication; or The base station sends the triggering event to the user equipment through a newly added message content in a timing advance command of the specified medium access control layer control element, wherein the newly added message content includes the triggering event.

31. The timing advance adjustment method of any one of claims 13-30, wherein, The base station sends the triggering event to the user equipment in the medium access control layer control element indication mode includes: The base station sends the triggering event to the user equipment through a newly added medium access control layer control element, wherein a message content of the newly added downlink control information format includes the triggering event, and the triggering event is a user timing advance auxiliary information reporting indication; or 32. The timing advance adjustment method of any one of claims 13-31, wherein, The base station sends the triggering event to the user equipment through a newly added message content in a timing advance command of the specified medium access control layer control element, wherein the newly added message content includes the triggering event. The base station sends the triggering event to the user equipment in the medium access control layer control element indication mode includes: The base station sends the triggering event to the user equipment through a newly added medium access control layer control element, wherein a message content of the newly added downlink control information format includes the triggering event, and the triggering event is a user timing advance auxiliary information reporting indication; or The base station sends the triggering event to the user equipment through a newly added message content in a timing advance command of the specified medium access control layer control element, wherein the newly added message content includes the triggering event. The base station sends the triggering event to the user equipment in the medium access control layer control element indication mode includes: The base station sends the triggering event to the user equipment through a newly added medium access control layer control element, wherein a message content of the newly added downlink control information format includes the triggering event, and the triggering event is a user timing advance auxiliary information reporting indication; or The base station sends the triggering event to the user equipment through a newly added message content in a timing advance command of the specified medium access control layer control element, wherein the newly added message content includes the triggering event. The base station sends the triggering event to the user equipment in the medium access control layer control element indication mode includes: The base station sends the triggering event to the user equipment through a newly added medium access control layer control element, wherein a message content of the newly added downlink control information format includes the triggering event, and the triggering event is a user timing advance auxiliary information reporting indication; or The base station sends the triggering event to the user equipment through a newly added message content in a timing advance command of the specified medium access control layer control element, wherein the newly added message content includes the triggering event. updating the timing advance value according to the timing advance amount between the user equipment and the satellite at the current moment.

33. The timing advance adjustment method of any one of claims 13-32, wherein, In a case where the user timing advance assistance information comprises a user location or a current cell identity of the user equipment, the base station updating the timing advance value according to the user timing advance assistance information comprises: determining a current location of the user equipment according to the user timing advance assistance information; determining a round trip transmission delay between the user equipment and the satellite according to the current location of the user equipment; determining a timing advance amount between the user equipment and the satellite at the current moment according to the round trip transmission delay between the user equipment and the satellite; updating the timing advance value according to the timing advance amount between the user equipment and the satellite at the current moment.

34. The timing advance adjustment method of any one of claims 13-33, wherein, In a case where the user timing advance assistance information comprises a moving speed, a moving acceleration and a moving direction, the base station updating the timing advance value according to the user timing advance assistance information comprises: determining a location change of the user equipment according to the user timing advance assistance information; determining a rate of change of the round trip transmission delay between the user equipment and the satellite according to the location change of the user equipment; determining a timing advance amount between the user equipment and the satellite at the current moment according to the rate of change of the round trip transmission delay and a last timing advance value reported by the user equipment; updating the timing advance value according to the timing advance amount between the user equipment and the satellite at the current moment.

35. The timing advance adjustment method of any one of claims 13-34, wherein, In a case where the user timing advance assistance information comprises whether there is a scheduling conflict occurring within a time interval between a last user timing advance assistance information reporting and a current user timing advance assistance information reporting, the base station updating the timing advance value according to the user timing advance assistance information comprises: in a case where there is a scheduling conflict occurring within the time interval between the last user timing advance assistance information reporting and the current user timing advance assistance information reporting, updating the timing advance amount between the user equipment and the satellite at the current moment as a maximum value of the timing advance value; updating the timing advance value according to the timing advance amount between the user equipment and the satellite at the current moment. 36.A user equipment comprising: an assistance information sending module configured to report user timing advance assistance information to a base station, wherein the user timing advance assistance information is used for the base station to update a timing advance value according to the user timing advance assistance information and to perform scheduling according to the updated timing advance value, and the user equipment is a reduced capability user equipment. 37.A user equipment comprising: a memory configured to store instructions; a processor configured to execute the instructions, so that the user equipment performs the timing advance adjustment method according to any one of claims 1 to 12. 38.A base station comprising: an assistance information receiving module configured to receive reported user timing advance assistance information of a user equipment, wherein the user equipment is a reduced capability user equipment; a timing advance updating module configured to update a timing advance value according to the user timing advance assistance information; a scheduling module configured to perform scheduling according to the updated timing advance value. 39.A base station comprising: a memory configured to store instructions; The processor is configured to execute the instructions to cause the base station to perform the timing advance adjustment method of any one of claims 13-35.

40. A non-terrestrial network comprising the base station of claim 38 or 39.

41. A timing advance adjustment system of a non-terrestrial network comprising the user equipment of claim 36 or 37 and the base station of claim 38 or 39.

42. A computer readable storage medium, wherein, The computer readable storage medium stores computer instructions which, when executed by a processor, implement the timing advance adjustment method of any one of claims 1-35.

43. A computer program product comprising a computer program, wherein, The computer program, when executed by a processor, implements the timing advance adjustment method of any one of claims 1-35.

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