CN117501792A

CN117501792A - Wireless communication method, terminal device and network device

Info

Publication number: CN117501792A
Application number: CN202180099378.XA
Authority: CN
Inventors: 赵楠德; 马东俊
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-11-04
Filing date: 2021-11-09
Publication date: 2024-02-02
Also published as: WO2023077531A1

Abstract

The embodiment of the application provides a wireless communication method, terminal equipment and network equipment, wherein the method comprises the following steps: receiving first information; the first information is used for indicating a first numerical value, the value range of the first numerical value is determined according to a maximum round trip delay and a minimum round trip delay, the maximum round trip delay comprises an RTT between a reference point and a position which is in a cell coverage range and is farthest from the reference point, and the minimum round trip delay comprises an RTT between the reference point and a position which is in the cell coverage range and is closest to the reference point; and determining a special time sequence offset value of the terminal equipment based on the first numerical value. The method provided by the application can improve the system performance on the basis of enhancing the scheduling flexibility.

Description

Wireless communication method, terminal device and network device

Technical Field

The embodiments of the present application relate to the field of communications, and more particularly, to a wireless communication method, a terminal device, and a network device.

Background

In a New Radio (NR) system, a Non-terrestrial communication network (Non-Terrestrial Networks, NTN) is considered to provide communication services to users. That is, communication services may be provided to terrestrial subscribers through satellites in the NTN. Satellite communications have many unique advantages over terrestrial cellular communications. However, compared to the cellular network adopted by the conventional NR, the time delay between the terminal device and the satellite in the NTN is greater, typically several tens to several hundred milliseconds, resulting in a greater adjustment amount of Timing Advance (TA) in the NTN. Therefore, it is necessary to introduce a timing offset value to enhance the uplink and downlink timing relationships, so as to avoid confusion of the timing relationships. For example, assume that the network device schedules the terminal device to transmit uplink data in time slot n, at which time the terminal device needs to enhance to transmit uplink data in time slot n+koffset to avoid that uplink transmission of the terminal device occurs before downlink scheduling. Wherein Koffset is an enhanced timing offset value, and Koffset is greater than or equal to TA of the terminal device.

Specifically, for the terminal device of the initial access procedure, since the network device lacks relevant information of the terminal device, a cell-level timing offset value may be configured through a system message, and the cell-level timing offset value needs to cover a Round Trip Time (RTT) between the reference point and a farthest position in the cell coverage. After the initial access is completed, the network device may further configure a timing offset value at a terminal device level for the terminal device through a Control Element (CE) of a media access Control (Media Access Control, MAC) based on RTT between the reference point and the terminal device, so as to enhance scheduling flexibility. That is, after the initial access is completed, the network device needs to reconfigure or even update the timing offset value of the terminal device level for the terminal device, and directly configuring or updating the timing offset value of the terminal device level for the terminal device causes a larger signaling overhead, which reduces the system performance.

Therefore, there is a need in the art for a wireless communication method to improve system performance while enhancing scheduling flexibility.

Disclosure of Invention

The embodiment of the application provides a wireless communication method, terminal equipment and network equipment, which can improve the system performance on the basis of enhancing the scheduling flexibility.

In a first aspect, the present application provides a wireless communication method, including:

receiving first information; the first information is used for indicating a first numerical value, the value range of the first numerical value is determined according to a maximum round trip time and a minimum round trip time, the maximum round trip time comprises round trip time RTT between a reference point and a position which is in a cell coverage range and is farthest from the reference point, and the minimum round trip time comprises RTT between the reference point and a position which is in the cell coverage range and is closest to the reference point;

and determining a special time sequence offset value of the terminal equipment based on the first numerical value.

In a second aspect, the present application provides a wireless communication method, including:

transmitting first information; the first information is used for indicating a first value, the value range of the first value is determined according to a maximum round trip time and a minimum round trip time, the maximum round trip time comprises round trip time RTT between a reference point and a position which is located in a cell coverage range and is farthest from the reference point, the minimum round trip time comprises RTT between the reference point and a position which is located in the cell coverage range and is closest to the reference point, and the first value is used for determining a special time sequence offset value of terminal equipment.

In a third aspect, the present application provides a terminal device for performing the method of the first aspect or each implementation manner thereof. Specifically, the terminal device includes a functional module for executing the method in the first aspect or each implementation manner thereof.

In one implementation, the terminal device may include a processing unit for performing functions related to information processing. For example, the processing unit may be a processor.

In one implementation, the terminal device may include a transmitting unit and/or a receiving unit. The transmitting unit is configured to perform a function related to transmission, and the receiving unit is configured to perform a function related to reception. For example, the transmitting unit may be a transmitter or a transmitter and the receiving unit may be a receiver or a receiver. For another example, the terminal device is a communication chip, the sending unit may be an input circuit or an interface of the communication chip, and the sending unit may be an output circuit or an interface of the communication chip.

In a fourth aspect, the present application provides a network device for performing the method of the second aspect or each implementation manner thereof. In particular, the network device comprises functional modules for performing the method of the second aspect or implementations thereof described above.

In one implementation, the network device may include a processing unit to perform functions related to information processing. For example, the processing unit may be a processor.

In one implementation, the network device may include a transmitting unit and/or a receiving unit. The transmitting unit is configured to perform a function related to transmission, and the receiving unit is configured to perform a function related to reception. For example, the transmitting unit may be a transmitter or a transmitter and the receiving unit may be a receiver or a receiver. For another example, the network device is a communication chip, the receiving unit may be an input circuit or an interface of the communication chip, and the transmitting unit may be an output circuit or an interface of the communication chip.

In a fifth aspect, the present application provides a terminal device comprising a processor and a memory. The memory is configured to store a computer program, and the processor is configured to invoke and execute the computer program stored in the memory, so as to perform the method in the first aspect or each implementation manner thereof.

In one implementation, the processor is one or more and the memory is one or more.

In one implementation, the memory may be integrated with the processor or separate from the processor.

In one implementation, the terminal device further includes a transmitter (transmitter) and a receiver (receiver).

In a sixth aspect, the present application provides a network device comprising a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method in the second aspect or various implementation manners thereof.

In one implementation, the network device further includes a transmitter (transmitter) and a receiver (receiver).

In a seventh aspect, the present application provides a chip for implementing the method in any one of the first aspect to the second aspect or each implementation thereof. Specifically, the chip includes: a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method as in any one of the first to second aspects or implementations thereof described above.

In an eighth aspect, the present application provides a computer-readable storage medium storing a computer program for causing a computer to perform the method of any one of the above first to second aspects or implementations thereof.

In a ninth aspect, the present application provides a computer program product comprising computer program instructions for causing a computer to perform the method of any one of the first to second aspects or implementations thereof.

In a tenth aspect, the present application provides a computer program which, when run on a computer, causes the computer to perform the method of any one of the above-described first to second aspects or implementations thereof.

Based on the above technical solution, by introducing the first information for indicating the first value and designing the value range of the first value to be determined according to the maximum round trip delay and the minimum round trip delay, that is, after the terminal device receives the first information, the dedicated time sequence offset value can be determined based on the first value indicated by the first information.

Drawings

Fig. 1 to 3 are schematic block diagrams of a system framework provided in an embodiment of the present application.

Fig. 4 and 5 show schematic diagrams of NTN scenarios based on a through-transmission-repeater satellite and a regenerative repeater satellite, respectively.

Fig. 6 is a schematic diagram of a cell coverage area under an NTN system provided in an embodiment of the present application.

Fig. 7 is a schematic diagram of uplink and downlink alignment using a base station as a reference point according to an embodiment of the present application.

Fig. 8 is a schematic flow chart of a wireless communication method provided in an embodiment of the present application.

Fig. 9 is a schematic diagram of a maximum RTT and a minimum RTT within a coverage area of a cell provided in an embodiment of the present application.

Fig. 10 is a schematic diagram of a maximum RTT and a minimum RTT in a cell coverage area under LEO and/or MEO scenarios provided in an embodiment of the present application.

Fig. 11 is a schematic diagram of a cell-level timing offset value for determining a dedicated timing offset value of a terminal device according to an embodiment of the present application.

Fig. 12 is a schematic block diagram of a terminal device provided in an embodiment of the present application.

Fig. 13 is a schematic block diagram of a network device provided in an embodiment of the present application.

Fig. 14 is a schematic block diagram of a communication device provided in an embodiment of the present application.

Fig. 15 is a schematic block diagram of a chip provided in an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of an application scenario according to an embodiment of the present application.

As shown in fig. 1, communication system 100 may include a terminal device 110 and a network device 120. Network device 120 may communicate with terminal device 110 over the air interface. Multi-service transmission is supported between terminal device 110 and network device 120.

It should be understood that the present embodiments are illustrated by way of example only with respect to communication system 100, but the present embodiments are not limited thereto. That is, the technical solution of the embodiment of the present application may be applied to various communication systems, for example: long term evolution (Long Term Evolution, LTE) system, LTE time division duplex (Time Division Duplex, TDD), universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), 5G communication system (also referred to as New Radio (NR) communication system), or future communication system, etc.

In the communication system 100 shown in fig. 1, the network device 120 may be an access network device in communication with the terminal device 110. The access network device may provide communication coverage for a particular geographic area and may communicate with terminal devices 110 (e.g., UEs) located within the coverage area.

The network device 120 may be an evolved base station (Evolutional Node B, eNB or eNodeB) in a long term evolution (Long Term Evolution, LTE) system, or a next generation radio access network (Next Generation Radio Access Network, NG RAN) device, or a base station (gNB) in a NR system, or a radio controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device 120 may be a relay station, an access point, a vehicle device, a wearable device, a hub, a switch, a bridge, a router, or a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc.

Terminal device 110 may be any terminal device including, but not limited to, a terminal device that employs a wired or wireless connection with network device 120 or other terminal devices.

For example, the terminal device 110 may refer to an access terminal, user Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolution network, etc.

The terminal Device 110 may be used for Device-to-Device (D2D) communication.

The wireless communication system 100 may further comprise a core network device 130 in communication with the base station, which core network device 130 may be a 5G core,5gc device, e.g. an access and mobility management function (Access and Mobility Management Function, AMF), further e.g. an authentication server function (Authentication Server Function, AUSF), further e.g. a user plane function (User Plane Function, UPF), further e.g. a session management function (Session Management Function, SMF). Optionally, the core network device 130 may also be a packet core evolution (Evolved Packet Core, EPC) device of the LTE network, for example a session management function+a data gateway (Session Management Function + Core Packet Gateway, smf+pgw-C) device of the core network. It should be appreciated that SMF+PGW-C may perform the functions performed by both SMF and PGW-C. In the network evolution process, the core network device may also call other names, or form a new network entity by dividing the functions of the core network, which is not limited in this embodiment of the present application.

Communication may also be achieved by establishing connections between various functional units in the communication system 100 through a next generation Network (NG) interface.

For example, the terminal device establishes an air interface connection with the access network device through an NR interface, and is used for transmitting user plane data and control plane signaling; the terminal equipment can establish control plane signaling connection with AMF through NG interface 1 (N1 for short); an access network device, such as a next generation radio access base station (gNB), can establish a user plane data connection with a UPF through an NG interface 3 (N3 for short); the access network equipment can establish control plane signaling connection with AMF through NG interface 2 (N2 for short); the UPF can establish control plane signaling connection with the SMF through an NG interface 4 (N4 for short); the UPF can interact user plane data with the data network through an NG interface 6 (N6 for short); the AMF may establish a control plane signaling connection with the SMF through NG interface 11 (N11 for short); the SMF may establish a control plane signaling connection with the PCF via NG interface 7 (N7 for short).

Fig. 1 exemplarily illustrates one base station, one core network device, and two terminal devices, alternatively, the wireless communication system 100 may include a plurality of base station devices and each base station may include other number of terminal devices within a coverage area, which is not limited in the embodiment of the present application.

In a New Radio (NR) system, a Non-terrestrial communication network (Non-Terrestrial Networks, NTN) is considered to provide communication services to users. NTN typically provides communication services to terrestrial users by way of satellite communications. Satellite communications have many unique advantages over terrestrial cellular communications. First, satellite communications are not limited by the user region, for example, general land communications cannot cover areas where communication devices cannot be installed, such as oceans, mountains, deserts, etc., or communication coverage is not performed due to rarity of population, while for satellite communications, since one satellite can cover a larger ground, and the satellite can orbit around the earth, theoretically every corner on the earth can be covered by satellite communications. And secondly, satellite communication has great social value. Satellite communication can be covered in remote mountain areas, poor and backward countries or regions with lower cost, so that people in the regions enjoy advanced voice communication and mobile internet technology, and the digital gap between developed regions is reduced, and the development of the regions is promoted. Again, the satellite communication distance is far, and the cost of communication is not obviously increased when the communication distance is increased; and finally, the satellite communication has high stability and is not limited by natural disasters.

Fig. 2 is a schematic architecture diagram of another communication system according to an embodiment of the present application.

As shown in FIG. 2, including a terminal device 1101 and a satellite 1102, wireless communication may be provided between terminal device 1101 and satellite 1102. The network formed between terminal device 1101 and satellite 1102 may also be referred to as NTN. In the architecture of the communication system shown in fig. 2, satellites 1102 may have the function of base stations, and direct communication may be possible between terminal device 1101 and satellites 1102. Under the system architecture, satellite 1102 may be referred to as a network device. In some embodiments of the present application, a plurality of network devices 1102 may be included in a communication system, and other numbers of terminal devices may be included within the coverage area of each network device 1102, which embodiments of the present application are not limited in this regard.

Fig. 3 is a schematic architecture diagram of another communication system according to an embodiment of the present application.

As shown in fig. 3, the system comprises a terminal device 1201, a satellite 1202 and a base station 1203, wherein wireless communication can be performed between the terminal device 1201 and the satellite 1202, and communication can be performed between the satellite 1202 and the base station 1203. The network formed between the terminal device 1201, the satellite 1202 and the base station 1203 may also be referred to as NTN. In the architecture of the communication system shown in fig. 3, the satellite 1202 may not have the function of a base station, and communication between the terminal device 1201 and the base station 1203 needs to be relayed through the satellite 1202. Under such a system architecture, the base station 1203 may be referred to as a network device. In some embodiments of the present application, a plurality of network devices 1203 may be included in the communication system, and a coverage area of each network device 1203 may include other number of terminal devices, which is not limited in the embodiments of the present application. The network device 1203 may be the network device 120 of fig. 1.

It should be appreciated that the satellites 1102 or 1202 include, but are not limited to:

low Earth Orbit (Low-Earth Orbit) LEO satellites, medium Earth Orbit (MEO) satellites, geosynchronous Orbit (Geostationary Earth Orbit, GEO) satellites, high elliptical Orbit (High Elliptical Orbit, HEO) satellites, and the like. Satellites may cover the ground with multiple beams, e.g., a satellite may form tens or even hundreds of beams to cover the ground. In other words, one satellite beam may cover a ground area of several tens to hundreds of kilometers in diameter to ensure satellite coverage and to increase the system capacity of the overall satellite communication system.

As an example, the LEO may have a height ranging from 500km to 1500km, a corresponding orbital period of about 1.5 hours to 2 hours, a signal propagation delay for single hop communication between users may generally be less than 20ms, a maximum satellite visibility time may be 20 minutes, a signal propagation distance of the LEO is short and a link loss is small, and a transmission power requirement of a user terminal is not high. The orbit height of GEO may be 35786km, the period of rotation around the earth may be 24 hours, and the signal propagation delay for single hop communication between users may typically be 250ms.

In general, in order to ensure coverage of a satellite and improve system capacity of an entire satellite communication system, the satellite adopts multiple beams to cover the ground, and one satellite can form tens or hundreds of beams to cover the ground; a satellite beam may cover a ground area of several tens to hundreds of kilometers in diameter.

It should be noted that fig. 1 to 3 illustrate, by way of example, a system to which the present application is applicable, and of course, the method shown in the embodiments of the present application may be applicable to other systems. Furthermore, the terms "system" and "network" are often used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship. It should also be understood that, in the embodiments of the present application, the "indication" may be a direct indication, an indirect indication, or an indication that there is an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B.

Satellites can be categorized into transmission-through forwarding (transparent payload) and regenerative forwarding (regenerative payload) from the functions they provide. For the transparent transmission forwarding satellite, only the functions of wireless frequency filtering, frequency conversion and amplification are provided, only the transparent forwarding of signals is provided, and the waveform signals forwarded by the transparent transmission forwarding satellite are not changed. For regenerative repeater satellites, in addition to providing functions of radio frequency filtering, frequency conversion and amplification, demodulation/decoding, routing/conversion, encoding/modulation functions may be provided, which have some or all of the functions of the base station.

In NTN, one or more gateways (Gateway) may be included for communication between satellites and terminals.

As shown in fig. 4, for the NTN scenario based on the transparent forwarding satellite, the gateway and the satellite communicate through a Feeder link (Feeder link), and the satellite and the terminal communicate through a service link (service link). As shown in fig. 5, for the NTN scenario based on regenerative forwarding satellites, communication is performed between satellites through inter-satellite (inter link), communication is performed between a gateway and satellites through Feeder links (Feeder links), and communication is performed between satellites and terminals through service links (service links). Wherein the feeder link may also be referred to as feeder link.

With the pursuit of speed, delay, high-speed mobility, energy efficiency and the diversity and complexity of future life services, the 3GPP international standards organization starts to develop 5G. The main application scenarios of 5G include: enhanced mobile Ultra-wideband (Enhance Mobile Broadband, emmbb), low latency high reliability communications (Ultra-Reliable and Low Latency Communication, URLLC), large scale machine type communications (massive machine type of communication, mctc). Among them, the ebb aims at users getting multimedia contents, services and data, and its demand is growing very rapidly. Since the eMBB may be deployed in a different scenario. For example, indoors, urban areas, rural areas, etc., the capability and demand of which are also quite different, so that detailed analysis can be combined with specific deployment scenarios cannot be generalized. Typical applications of URLLC include: industrial automation, electric power automation, remote medical operation (surgery), traffic safety guarantee and the like. Typical characteristics of mctc include: high connection density, small data volume, delay insensitive traffic, low cost and long service life of the module, etc.

It should be understood that fig. 1-5 are only examples of the present application and should not be construed as limiting the present application.

For example, in other alternative embodiments, the NTN system may also include a drone system (Unmanned Aircraft System).

In particular, the satellites in fig. 2-5 may be replaced with a UAS platform. For example, UAS platforms include, but are not limited to, high altitude platforms (High Altitude Platform Station, HAPS).

For the sake of understanding the solution of the present application, the following describes the content related to the coverage of a cell in an NTN system.

As shown in fig. 6, the field of view of a satellite (or UAS platform) depends on the antenna pattern and the minimum elevation angle, and the satellite (or UAS platform) generates multiple beams for a given service area within its field of view, where the coverage of each beam may be referred to as cell coverage and the beam is generally elliptical.

It should be noted that, for convenience of description, fig. 6 shows coverage of only one beam, and in other alternative embodiments, a plurality of cells may be formed by a plurality of beams, which is not limited in detail in this application.

Cell coverage for different types of satellites (including HAPS) is illustrated below in conjunction with tables 1 and 2:

TABLE 1 relevant parameters for different types of satellites

As shown in table 1, different satellites have different cell coverage. In other words, the cell coverage is affected by parameters such as the altitude range of the satellite and the orbit.

TABLE 2 relevant parameters in GEO scenario and LEO scenario

As shown in table 2, in the case of minimum elevation determination of the base station and the terminal device to the satellite, respectively, the maximum size of the cell coverage, the maximum distance of the base station and the terminal device to the satellite, respectively, the maximum round trip delay, the difference between the maximum delay and the minimum delay within the cell coverage may be fixed.

In order to facilitate understanding of the solution provided in the present application, the following describes the content related to uplink and downlink timing in the NTN system.

In NTN systems, transmission delay between a base station and User Equipment (UE) is large, so that uplink and downlink time sequence relationships on the base station and UE sides are not aligned. Therefore, the concept of a reference point is introduced into the NTN system, and the base station and the UE are respectively adjusted by the TA, so that the uplink and downlink time sequence relationship is ensured to be aligned at the reference point. The reference point may be located at a base station, a satellite, or any position between base stations and satellites, which is not limited in this application.

As shown in fig. 7, taking the reference point on the satellite side as an example, for TA adjustment on the UE side, since the time delay on the service link is introduced when the downlink transmission on the satellite side arrives at the UE, the UE needs to pass TA adjustment when uplink to ensure that the uplink time sequence arrives at the satellite is aligned with the downlink time sequence. For example, TA adjustment at the UE side requires Round Trip Time (RTT) of the overlay service link. Meanwhile, for TA adjustment at the base station side, since delay on a feed link is introduced when uplink transmission at the satellite side reaches the base station, the base station needs to be adjusted by TA when transmitting downlink to ensure that the downlink time sequence reaches the satellite and is aligned with the uplink time sequence. For example, TA adjustment at the base station side requires RTT of the coverage feed link.

It should be understood that the TA adjustment manner when the reference point is located at other positions is similar to the TA adjustment manner when the reference point is located at the satellite side, and will not be repeated here.

Compared with the cellular network adopted by the traditional NR, the Timing Advance (TA) adjustment amount between the terminal equipment and the satellite in the NTN is larger. Therefore, it is necessary to introduce a timing offset value to enhance the uplink and downlink timing relationships, so as to avoid confusion of the timing relationships. For example, assume that the network device schedules the terminal device to transmit uplink data in time slot n, at which time the terminal device needs to enhance to transmit uplink data in time slot n+koffset to avoid that uplink transmission of the terminal device occurs before downlink scheduling. Wherein Koffset is an enhanced timing offset value, and Koffset is greater than or equal to TA of the terminal device. Specifically, for the terminal device of the initial access procedure, since the network device lacks relevant information of the terminal device, a cell-level timing offset value may be configured through a system message, and the cell-level timing offset value needs to cover a Round Trip Time (RTT) between the reference point and a farthest position in the cell coverage. After the initial access is completed, the network device may further configure a timing offset value at a terminal device level for the terminal device through a Control Element (CE) of a media access Control (Media Access Control, MAC) based on RTT between the reference point and the terminal device, so as to enhance scheduling flexibility.

Taking the example that the reference point is at the base station side, based on different satellite orbit heights, the RTT from the reference point to the UE under different scenes can be calculated, so that a Koffset value range is provided. An exemplary description is provided below in connection with table 3.

TABLE 3 Koffset Range of values under different scenarios

Scene(s)	Koffset value range
HAPS	[0]–[4]ms
LEO	[4]–[49]ms
MEO	[47]–[395]ms
GEO	[239]–[542]ms

As shown in table 3, different scenarios correspond to or support different Koffset value ranges. Of course, in other alternative embodiments, different scenes may correspond to or support the same Koffset value range, for example, one Koffset value range may be used to cover all scenes, i.e., [0] to [542] ms, which is not specifically limited in this application.

Based on the above analysis, after the initial access is completed, the network device needs to reconfigure or even update the timing offset value of the terminal device level for the terminal device, and when configuring or updating the timing offset value of the terminal device level for the terminal device, even if one Koffset value range is used to cover all scenes, larger signaling overhead is caused, and system performance is reduced. In addition, if different scenes correspond to or support different Koffset value ranges, it is further necessary to determine the Koffset value ranges corresponding to or supported by the different scenes.

Based on the above, the embodiment of the application provides a wireless communication method, a terminal device and a network device, which can improve the system performance on the basis of enhancing the scheduling flexibility.

Specifically, the network device may configure the terminal device with the dedicated timing offset value by means of the first value. That is, the terminal device may determine the dedicated timing offset value based on the cell-level timing offset value and a first value configured by the network device, wherein the first value may be a difference of the cell-level timing offset value relative to the dedicated timing offset value. In addition, the application designs the value range of the first numerical value aiming at different NTN scenes (GEO/MEO/LEO/UAS platforms). In addition, the latest updated cell-level timing offset value before the first value is received is designed as the cell-level timing offset value used in calculating the dedicated timing offset value.

Fig. 8 shows a schematic flow chart of a wireless communication method 200 according to an embodiment of the present application, which method 200 may be performed interactively by a terminal device and a network device. The terminal device shown in fig. 2 may be a terminal device as shown in fig. 1, and the network device shown in fig. 2 may be an access network device as shown in fig. 1.

As shown in fig. 2, the method 200 may include some or all of the following:

s210, the terminal equipment receives first information sent by the network equipment; the first information is used for indicating a first numerical value, the value range of the first numerical value is determined according to the difference value of the maximum round trip delay and the minimum round trip delay, the maximum round trip delay is round trip delay (RTT) between a reference point and a position which is in a cell coverage range and is farthest from the reference point, and the minimum round trip delay is RTT between the reference point and a position which is in the cell coverage range and is closest to the reference point;

s220, the terminal device determines a dedicated timing offset value of the terminal device based on the first value.

In other words, the network device sends the first information to the terminal device; correspondingly, after receiving the first information, the terminal device may determine the dedicated timing offset value based on a first value indicated by the first information. Optionally, the first value is in units of ms.

In this embodiment, by introducing first information for indicating the first value, and designing the value range of the first value to be determined according to the maximum round trip delay and the minimum round trip delay, that is, after the terminal device receives the first information, the dedicated timing offset value may be determined based on the first value indicated by the first information.

The dedicated timing offset value referred to in the present application may be understood as a timing offset value at the terminal device level or the UE level. I.e. the dedicated timing offset value is for the terminal device. That is, the first value in the present application is for the terminal device, that is, different terminal devices may correspond to different first values, or may correspond to the same first value, which is not specifically limited in the present application.

In addition, the term "indication" referred to in the embodiments of the present application may be a direct indication, an indirect indication, or an indication having an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B. In connection with the present application, a is the first information and B is the first value.

It should also be appreciated that the present application is not limited in the manner in which the maximum round trip delay and the minimum round trip are determined.

For example, the maximum round trip delay and the minimum round trip delay may be determined based on the reference point. The reference point may be a reference geographic location of uplink and downlink time alignment introduced by the NTN system. Illustratively, if the reference point is a satellite, the maximum round trip delay and the minimum round trip delay may each comprise a round trip delay of a serving link; if the reference point is a base station, the maximum round trip delay and the minimum round trip delay may each include a round trip delay of a serving link and a round trip delay of a feeder link.

In some embodiments, the range of values for the first value is determined from a first difference between the maximum round trip delay and the minimum round trip delay.

In other words, the first value may be a value in a range of values determined based on the first difference value.

It should be noted that, in other alternative embodiments, the value range of the first value may also be determined based on other calculation results of the maximum round trip delay and the minimum round trip delay, which is not limited in this application specifically. For example, the range of values of the first value may be determined based on a ratio of the maximum round trip delay and the minimum round trip delay.

Optionally, the S220 may include:

determining a difference between a cell level timing offset value and the first value as the dedicated timing offset value; the cell level timing offset value is greater than or equal to the maximum round trip delay.

In other words, the first value is a difference of the cell-level timing offset value relative to the dedicated timing offset value.

Illustratively, the first information is indicative of a value of 28 for the first value assuming a range of values of [0,31] ms for the first value. The terminal device may determine the difference between the cell level timing offset value and 28 as the dedicated timing offset value after receiving the first information.

Note that, the method for acquiring the cell-level timing offset value is not particularly limited in this application.

For example, the cell-level timing offset value may be a timing offset value acquired by the terminal device in an initial access procedure. For the terminal device of the initial access procedure, since the network device lacks the relevant information of the terminal device, the cell-level timing offset value may be configured by a system message, and may cover RTT between the reference point and the farthest position in the cell coverage. For example, the cell-level timing offset value may be greater than or equal to RTT between the reference point and the furthest location within the cell coverage. For example, if the reference point is a satellite, the cell-level timing offset value may include a round trip delay of a serving link; if the reference point is a base station, the cell-level timing offset value may include a round trip delay of a serving link and a round trip delay of a feeder link.

Optionally, the method 200 may further include:

second information is received, the second information being used to indicate the cell-level timing offset value.

The second information is illustratively a system message or a broadcast message.

Optionally, the cell level timing offset value is the cell level timing offset value updated last time before the terminal device receives the first information.

In other words, the cell-level timing offset value used for calculating the dedicated timing offset value is the cell-level timing offset value that was last updated by the terminal device before receiving the first information. That is, the terminal device determines a difference between the cell level timing offset value updated last time before receiving the first information and the first value as the dedicated timing offset value. It should be appreciated that the network device may update the cell-level timing offset value multiple times, such as periodically or aperiodically, for example, and as another example, based on the movement of satellites, as not specifically limited in this application.

In this embodiment, the cell-level timing offset value that is updated up to date before the first information is received is designed to be the cell-level timing offset value used when calculating the dedicated timing offset value, so that it can be ensured that the base station and the terminal device keep consistent calculation and understanding of the dedicated timing offset value, and system performance is improved.

In some embodiments, the first value ranges from [0, m ]; wherein M is greater than or equal to K, and K represents the first difference.

In other words, the minimum value of the first value is 0, and the maximum value of the first value is a value greater than or equal to the first difference value.

For example, if the base station configures the cell-level timing offset value to be Oms and configures the terminal device with the first value to be Yms after the initial access is completed, the terminal device may determine that the dedicated timing offset value at this time is O-Yms.

In this embodiment, the range of the first value is set to be [0, M]Assuming that the unit of the first value is Xms (X. Gtoreq.1), the first information indicating the first value requires log ₂ Signaling overhead of (m+1/X) bits. When x=1 ms, the signaling overhead required to indicate the first value is log ₂ (M+1/1) bits. Compared with the method for directly updating the special time sequence offset value, the method provided by the application can replace the bit occupied by the special time sequence offset value with the bit occupied by the first numerical value, and because the value range of the first numerical value is smaller than the value range of the special time sequence offset value, the method provided by the application can reduce signaling overhead caused when the network equipment indicates the special time sequence offset value to the terminal equipment, and further, the system performance can be improved on the basis of enhancing the scheduling flexibility.

Alternatively, m=2 ^m -1; wherein M is the smallest integer that makes M.gtoreq.K.

In this embodiment, M is designed to be equal to 2 ^m And 1, M is designed to be a minimum integer for ensuring that M is more than or equal to K, so that the value range of the first numerical value can cover any value from 0 to K in the coverage range of a cell, a certain extra space can be reserved, and the robustness of the NTN system is improved.

Of course, in other alternative embodiments, M may be determined in other ways, which are not particularly limited in this application. For example, M is a value obtained by rounding up K.

Optionally, the method is applicable to GEO scenes and/or HAPS scenes.

In some embodiments, the first value is in the range of [ -N, N ] or [0, N ]; wherein N is equal to or greater than 2K, and K represents the first difference.

As an example, the present application may design the value range of the first value to be [0, N ]]Assuming that the unit of the first value is Xms (X. Gtoreq.1), the first information indicating the first value requires log ₂ Signaling overhead of (n+1/X) bits. Wherein log ₂ (N+1/X) represents the range [0, N]The number of bits required. When x=1 ms, the signaling overhead required to indicate the first value is log ₂ (n+1/1) bits. Compared with the method for directly updating the special time sequence offset value, the method provided by the application can replace the bit occupied by the special time sequence offset value with the bit occupied by the first numerical value, and because the value range of the first numerical value is smaller than the value range of the special time sequence offset value, the method provided by the application can reduce signaling overhead caused when the network equipment indicates the special time sequence offset value to the terminal equipment, and further, the system performance can be improved on the basis of enhancing the scheduling flexibility.

In addition, as the satellite continuously moves relative to the earth, the distance between the satellite and the terminal equipment continuously becomes smaller, and even the special time sequence offset value is possibly smaller than the difference value between the cell-level time sequence offset value and the first difference value, the value range of the first numerical value is [0, N ], and N is designed to be a numerical value of the first difference value which is larger than or equal to 2 times, so that the special time sequence offset value finally obtained by the terminal equipment can be ensured to be smaller than the difference value between the cell-level time sequence offset value and the first difference value, and the accuracy of the special time sequence offset value is improved.

As another example, the present application may design the value range of the first value to be [ -N, N]Assuming that the unit of the first value is Xms (X. Gtoreq.1), the first information indicating the first value requires 1+log ₂ Signaling overhead of (n+1/X) bits. Wherein log ₂ (N+1/X) represents the range [0, N]The number of bits required, an additional 1 bit, is used to extend the range of values to [ -N, N]. When x=1 ms, the signaling overhead required to indicate the first value is 1+log ₂ (n+1/1) bits. Compared with the method for directly updating the special time sequence offset value, the method provided by the application can replace the bit occupied by the special time sequence offset value with the bit occupied by the first numerical value, and because the value range of the first numerical value is smaller than the value range of the special time sequence offset value, the method provided by the application can reduce signaling overhead caused when the network equipment indicates the special time sequence offset value to the terminal equipment, and further, the system performance can be improved on the basis of enhancing the scheduling flexibility.

In addition, as the satellite continuously moves relative to the earth, the distance between the satellite and the terminal equipment continuously increases, and even the special time sequence offset value is possibly larger than the latest updated cell-level time sequence offset value.

In addition, as the satellite continuously moves relative to the earth, the distance between the satellite and the terminal equipment continuously becomes smaller, even the special time sequence offset value is possibly smaller than the difference value between the cell-level time sequence offset value and the first difference value, the value range of the first numerical value is [ -N, N ], and N is designed to be a numerical value of the first difference value which is larger than or equal to 2 times, so that the special time sequence offset value finally obtained by the terminal equipment can be ensured to be smaller than the difference value between the cell-level time sequence offset value and the first difference value, and the accuracy of the special time sequence offset value is improved.

In other words, based on the above analysis, in LEO and/or MEO scenarios, the constant motion of the satellites may lead to two cases:

case 1:

the dedicated timing offset value is less than a difference of the cell level timing offset value and the first difference.

Case 2:

the dedicated timing offset value is greater than the cell-level timing offset value.

It should be noted that, in the present application, it is considered that the cell-level timing offset value broadcast by the base station is usually slightly larger than the RTT (i.e. the maximum round trip delay) from the reference point to the farthest position in the cell, that is, the base station has a certain extra space for the cell-level timing offset value based on the satellite motion, and the base station in the NTN system periodically notifies the cell-level timing offset value, that is, along with the satellite motion, the cell-level timing offset value broadcast by the base station at different times is also updated, that is, the probability of occurrence of the foregoing case 2 is low, so the present application may consider the foregoing case 2, or may not consider the case 2, which is not limited in particular.

For example, the present application may consider the above case 2, that is, the value range of the first numerical value is set to [ -N, N ]. In other words, the range of values of the first values of the LEO and/or MEO scene may be extended to [ -N, N ] to ensure robustness in indicating the dedicated timing offset value by way of the first value.

For another example, the present application may set the value range of the first numerical value to [0, n ] regardless of the above case 2. In other words, the range of values of the first values of the LEO and/or MEO scene may be narrowed down to [0, N ], and compared to designing the range of values of the first values to [ -N, N ], the range of values of the first values is designed to [0, N ], which not only ensures the robustness of indicating the dedicated timing offset value by means of the first values, but also saves the 1-bit overhead of the symbol for indicating the first values, and further, can further reduce the signaling overhead.

Optionally, the first information includes information indicating an absolute value of the first numerical value and information indicating a sign of the first numerical value.

Illustratively, the information indicating the sign of the first numerical value is a most significant bit or a least significant bit of the first information, and bits other than the bits indicating the sign of the first numerical value in the first information are used to indicate an absolute value of the first numerical value. For example, taking a symbol indicating the first information by the most significant bit of the first information as an example, if the most significant bit is 1, it indicates that the first numerical value is a negative value, and if the most significant bit is 0, it indicates that the first numerical value is a positive value; alternatively, if the highest order is 1, it means that the first value is a positive value, and if the highest order is 0, it means that the first value is a negative value.

Alternatively, n=2 ⁿ -1; wherein N is a minimum integer such that N.gtoreq.2K.

In this embodiment, N is designed to be equal to 2 ⁿ -1, and N is designed as a minimum integer for ensuring that N is not less than 2K, not only the range of values of the first numerical value can cover any value from-2K to 2K in the coverage area of the cell (i.e. the range of values of the first numerical value is [ -N, N)]) Or any value from 0 to 2K (i.e., the first value has a value in the range of 0, N]) Certain extra space can be reserved, and the robustness of the NTN system is improved.

Of course, in other alternative embodiments, N may be determined according to other manners, which are not specifically limited in this application. For example, N is a value obtained by rounding up K.

It is noted that N is the smallest integer such that N.gtoreq.2K is only an example of the present application and should not be construed as limiting the present application.

For example, in other alternative embodiments, N is the smallest integer such that N+.a.times.K, where a > 1. For example a is an integer greater than 1. Optionally, the value of a is predefined or configured by the network device.

Optionally, the method is applicable to MEO scenes and/or LEO scenes.

As can be seen from table 1 above, the maximum sizes of the cell coverage areas of the MEO scene and the LEO scene are the same, that is, both are 1000km, resulting in a difference between the maximum delay and the minimum delay in the cell coverage area in the MEO scene, and the difference between the maximum delay and the minimum delay in the cell coverage area in the LEO scene is also less than 3.5ms, so that the first numerical value can correspond to the same value range for the MEO scene and the LEO scene.

The following is an exemplary description of the solution provided in this application in connection with specific embodiments.

Example 1:

based on this, in this embodiment, by introducing the first information for indicating the first value, and designing the value range of the first value to be determined according to the maximum round trip delay and the minimum round trip delay, that is, after the terminal device receives the first information, the dedicated timing offset value may be determined based on the first value indicated by the first information. For example, a difference between a cell level timing offset value and the first value may be determined as the dedicated timing offset value.

As shown in fig. 9, taking the example that the reference point is at the satellite side, the maximum round trip delay includes RTT between the reference point and a location within the cell coverage and farthest from the reference point, and the minimum round trip delay includes RTT between the reference point and a location within the cell coverage and closest to the reference point.

For the UE in the initial access phase, the base station configures the cell-level timing offset value by broadcasting a system message. Since the cell level timing offset value needs to cover the RTT of the reference point to all UEs within the cell, the cell level timing offset value can be calculated based on the RTT of the reference point to the farthest UE within the cell. Considering that the requirement of configuring the cell-level timing offset value on scheduling flexibility is low, quantization granularity greater than or equal to 1ms can be configured, so that signaling overhead is reduced. Taking the example of using one value range to cover all scenes, i.e., [0] to [542] ms corresponds to or supports all scenes, if a 1ms quantization granularity is employed, 10 bits of signaling overhead is required. If a 4ms quantization granularity is used, only 8 bits are needed, which can save the signaling overhead of 2 bits.

In this embodiment, considering that the UE still has a specific cell-level timing offset value after the initial access is completed, the base station may configure the dedicated timing offset value for the terminal device by indicating a difference between the cell-level timing offset value and the dedicated timing offset value based on the cell-level timing offset value, so as to save signaling overhead.

For example, as can be seen from table 2 above, for GEO scenario, since the difference between the maximum delay and the minimum delay in the cell coverage is 10.3ms, the first difference between the maximum round trip delay and the minimum round trip delay in the cell coverage is 20.6ms. Since the dedicated timing offset value of any one terminal device is generally matched with the RTT from the reference point to the any one terminal device, the difference between the cell-level timing offset value and the dedicated timing offset value of any one terminal device in the cell coverage area does not exceed the first difference in the cell coverage area, that is, the difference between the cell-level timing offset value and the dedicated timing offset value of any one terminal device does not exceed 20.6ms.

Assuming that in a GEO cell, the RTT from the reference point to the farthest UE in the cell coverage is 540.6ms, the RTT from the reference point to the nearest UE in the cell coverage is not less than 540.6-20.6=520 ms. If the specific timing offset value is directly notified every time the dedicated timing offset value is updated, 10-bit signaling overhead is required when 1ms quantization granularity is employed. If the special time sequence offset value is updated in a mode of indicating the difference value based on the cell-level time sequence offset value, the quantization of the difference value of 20.6ms only needs 5 bits of signaling overhead at most, and the signaling overhead can be effectively saved.

Example 2:

in the embodiment, in the GEO scenario, an implementation manner of configuring a dedicated timing offset value for a terminal device is described for a network device by indicating a difference between a cell-level timing offset value and a dedicated timing offset value.

As can be seen from table 2 above, for GEO scenarios, the difference between the maximum and minimum delays in the cell coverage is 10.3ms, and therefore the first difference between the maximum and minimum round trip delays in the cell coverage is 20.6ms. Since the dedicated timing offset value of any one terminal device is generally matched with the RTT from the reference point to the any one terminal device, the difference between the cell-level timing offset value and the dedicated timing offset value of any one terminal device in the cell coverage area does not exceed the first difference in the cell coverage area, that is, the difference between the cell-level timing offset value and the dedicated timing offset value of any one terminal device does not exceed 20.6ms.

The present embodiment rounds the first difference up to 2 ⁿ -1=31 ms to obtain the maximum value of the first numerical value in the GEO scene, namely the range of the first numerical value in the GEO scene is [0,31 ] ]ms. In the present embodiment, the range of the first value is designed as [0,31 ]]ms, the value range of the first numerical value can cover any value from 0 to 20.6 in the coverage area of the cell, a certain extra space can be reserved, and the robustness of the NTN system is improved.

For example, if the base station configures the cell-level timing offset value to be Oms and configures the terminal device with the first value to be Yms after the initial access is completed, the terminal device may determine that the dedicated timing offset value at this time is O-Yms. If the cell level timing offset value is o=540 ms and the first value is y=20 ms, then the dedicated timing offset value may be determined to be 540-20=520 ms.

In this embodiment, the range of the first value is set to be [0,31]Assuming the first value is in units of Xms (X.gtoreq.1), then it is used to indicateThe first information of the first value requires log ₂ (32/X) bits. When x=1 ms, the signaling overhead required to indicate the first value is log ₂ (32/1) bits. In comparison with directly updating the dedicated timing offset value, e.g., taking the example of using one range of values to cover all scenes, i.e., [0 ]]–[542]ms corresponds to or supports all scenarios, if a 1ms quantization granularity is employed, a 10 bit signaling overhead is required. The method provided by the application can replace the bit occupied by the special time sequence offset value with the bit occupied by the first numerical value, for example, when x=1 ms, the signaling overhead required by the first numerical value indicated by the GEO scene is log ₂ (32/1) =5 bits. That is, because the value range of the first numerical value is smaller than the value range of the dedicated time sequence offset value, the method provided by the application can reduce signaling overhead caused when the network device indicates the dedicated time sequence offset value to the terminal device, and further, can improve system performance on the basis of enhancing scheduling flexibility.

Example 3:

in the embodiment, in the HAPS scenario, an implementation manner of configuring a dedicated timing offset value for a terminal device is described for a network device by indicating a difference between a cell-level timing offset value and a dedicated timing offset value.

As can be seen from table 2 above, for the HAPS scenario, the maximum size of the cell coverage is 200km, the maximum size of the cell coverage of the reference GEO scenario is 3500km, and the difference between the maximum delay and the minimum delay in the cell coverage is 10.3ms, so the difference between the maximum delay and the minimum delay in the cell coverage is about 10.3/(3500/200) =0.6 ms, i.e., the first difference between the maximum round trip delay and the minimum round trip delay is 1.2ms. Since the dedicated timing offset value is usually matched with the RTT from the reference point to the terminal device, the difference between the cell-level timing offset value and the dedicated timing offset value of any terminal device in the coverage area of the cell does not exceed the first difference in the coverage area of the cell, i.e. the difference between the cell-level timing offset value and the dedicated timing offset value of any terminal device does not exceed 1.2ms.

The present embodiment rounds the first difference up to 2 ⁿ -1=3 ms, yielding a maximum value of the first value in the HAPS scene, i.e. the range of values of the first value in the HAPS scene is [0,3 ]]ms. In this embodiment, the range of the first value is designed as [0,3 ]]ms, the value range of the first numerical value can cover any value from 0 to 1.2 in the coverage area of the cell, a certain extra space can be reserved, and the robustness of the NTN system is improved.

For example, if the base station configures the cell-level timing offset value to be Oms and configures the terminal device with the first value to be Yms after the initial access is completed, the terminal device may determine that the dedicated timing offset value at this time is O-Yms. If the cell level timing offset value is o=3 ms and the first value is y=1 ms, then the dedicated timing offset value may be determined to be 3-1=2 ms.

In this embodiment, the range of the first value is designed as [0,3 ]]Assuming that the unit of the first value is Xms (X. Gtoreq.1), the first information indicating the first value requires log ₂ (4/X) bits. When x=1 ms, the signaling overhead required to indicate the first value is log ₂ (4/1) bits. In comparison with directly updating the dedicated timing offset value, e.g., taking the example of using one range of values to cover all scenes, i.e., [0 ] ]–[542]ms corresponds to or supports all scenarios, if a 1ms quantization granularity is employed, a 10 bit signaling overhead is required. The method provided by the application can replace the bit occupied by the special time sequence offset value with the bit occupied by the first value, for example, when X=1 ms, the HAPS scene indicates that the signaling overhead required by the first value is log ₂ (4/1) =2 bits. That is, because the value range of the first numerical value is smaller than the value range of the dedicated time sequence offset value, the method provided by the application can reduce signaling overhead caused when the network device indicates the dedicated time sequence offset value to the terminal device, and further, can improve system performance on the basis of enhancing scheduling flexibility.

Example 4:

in the embodiment, in the LEO and/or MEO scenarios, an implementation manner of configuring a dedicated timing offset value for a terminal device is described for a network device by indicating a difference between a cell-level timing offset value and a dedicated timing offset value.

As can be seen from table 2 above, for LEO and/or MEO scenarios, the difference between the maximum and minimum delays within the cell coverage is less than 3.5ms, and therefore the first difference between the maximum and minimum round trip delays within the cell coverage is less than 7ms. Since the dedicated timing offset value of any one terminal device is generally matched with the RTT from the reference point to the any one terminal device, the difference between the cell-level timing offset value and the dedicated timing offset value of any one terminal device in the cell coverage area does not exceed the first difference in the cell coverage area, i.e. the difference between the cell-level timing offset value and the dedicated timing offset value of any one terminal device does not exceed 7ms.

The present embodiment rounds the first difference up to 2 ⁿ -1 = 7ms, obtaining the maximum value of the first value in the LEO and/or MEO scene, i.e. the range of values of the first value in the LEO and/or MEO scene is [0,7 ]]ms. In the present embodiment, the range of the first value is designed as [0,7 ]]ms, the value range of the first value can cover any value from 0 to 7 in the coverage area of the cell.

For example, if the base station configures the cell-level timing offset value to be Oms and configures the terminal device with the first value to be Yms after the initial access is completed, the terminal device may determine that the dedicated timing offset value at this time is O-Yms. If the cell level timing offset value is o=30 ms and the first value is y=6 ms, then the dedicated timing offset value may be determined to be 30-6=24 ms.

In this embodiment, the range of the first value is set to be [0,7 ]]Assuming that the unit of the first value is Xms (X. Gtoreq.1), the first information indicating the first value requires log ₂ (8/X) bits. When x=1 ms, the signaling overhead required to indicate the first value is log ₂ (8/1) bits. And directly update theIn comparison with dedicated timing offset values, e.g. taking the example of using one range of values to cover all scenes, i.e. [0 ] ]–[542]ms corresponds to or supports all scenarios, if a 1ms quantization granularity is employed, a 10 bit signaling overhead is required. The method provided by the application can replace the bits occupied by the special time sequence offset value with the bits occupied by the first value, for example, when x=1 ms, the LEO and/or MEO scene indicates that the signaling overhead required by the first value is log ₂ (8/1) =3 bits. That is, because the value range of the first numerical value is smaller than the value range of the dedicated time sequence offset value, the method provided by the application can reduce signaling overhead caused when the network device indicates the dedicated time sequence offset value to the terminal device, and further, can improve system performance on the basis of enhancing scheduling flexibility.

It should be noted that, due to the continuous movement of the satellite with respect to the earth, the distance between the satellite and the terminal device becomes larger, which may even cause the dedicated timing offset value to be larger than the most recently updated cell-level timing offset value. Similarly, due to the constant movement of the satellite relative to the earth, the distance between the satellite and the terminal device becomes smaller, possibly even resulting in the dedicated timing offset value being smaller than the difference between the cell-level timing offset value and the first difference.

As shown in fig. 10, taking the reference point on the satellite side as an example, T ₁ The maximum round trip time in the position is the maximum RTT ₁ The minimum round trip time delay is the minimum RTT ₁ ；T ₀ The maximum round trip time in the position is the maximum RTT ₀ The minimum round trip time delay is the minimum RTT ₀ 。

Assuming that the satellite moves from right to left, the satellite is at T ₁ The cell level timing offset value broadcast in position is 37ms; furthermore, maximum RTT ₁ And minimum RTT ₁ Is rounded up to 2 ⁿ -1 = 7ms; i.e. the first numerical range is still[0,7]ms. When the satellite moves to T ₀ In position, as the distance from the satellite to the UE becomes larger, the dedicated timing offset value is 39ms, i.e. T ₀ The dedicated timing offset value at the position may be instead greater than T ₁ Cell level timing offset values broadcast in location. In other words, if the first numerical range is still [0,7]ms, the range of dedicated timing offset values determined by the first value is [30,37 ]]ms, i.e. the network device cannot configure the terminal device with a dedicated timing offset value of more than 37 by means of said first value.

Assuming that the satellite moves from left to right, the satellite is at T ₀ The cell level timing offset value broadcast in position is 39ms; furthermore, maximum RTT ₀ And minimum RTT ₀ Is rounded up to 2 ⁿ -1 = 7ms; i.e. the first numerical range is still [0,7 ]]ms. When the satellite moves to T ₁ In position, as the satellite-to-UE distance becomes smaller, the dedicated timing offset value is reduced to 30ms. I.e. T ₁ The dedicated timing offset value at a location is likely to be less than T ₀ Cell level timing offset values broadcast in location. In other words, if the first numerical range is still [0,7]ms, the range of dedicated timing offset values determined by the first value is [32,39 ]]ms, i.e. the network device cannot configure the terminal device with a dedicated timing offset value smaller than 32 by means of said first value.

Based on the above, the application can enable the base station to configure the terminal equipment with a larger range of the special time sequence offset value by expanding the value range of the first numerical value.

The present embodiment rounds the first difference up to 2 ⁿ -1 = 7ms to obtain the maximum value of the first value in the LEO and/or MEO scene, i.e. the range of values of the first value in the LEO and/or MEO scene is [ -7,7]ms. By setting the minimum value of the first numerical value to-7, the method and the device can ensure that the special time sequence offset value finally obtained by the terminal equipment can be larger than the latest updated cell-level time sequence offset, and improve the accuracy of the special time sequence offset value.

Exemplary, the present embodimentFor example, the first difference is rounded up to 2 ⁿ -1 = 7ms to obtain the maximum value of the first value in the LEO and/or MEO scene, i.e. the range of values of the first value in the LEO and/or MEO scene is [ -15,15]ms. By setting the minimum value of the first numerical value to-15, the method and the device can ensure that the special time sequence offset value finally obtained by the terminal equipment is larger than the latest updated cell-level time sequence offset, and improve the accuracy of the special time sequence offset value. In addition, the absolute value of the maximum value and the absolute value of the minimum value of the first numerical value are designed to be larger than 14, namely, the absolute value of the maximum value and the absolute value of the minimum value of the first numerical value are designed to be larger than 2 times of the numerical value of the first difference value, so that the special time sequence offset value finally obtained by the terminal equipment can be ensured to be smaller than the difference value between the cell-level time sequence offset value and the first difference value, and the accuracy of the special time sequence offset value is improved.

For example, if the base station configures the cell-level timing offset value to be Oms and configures the terminal device with the first value to be Yms after the initial access is completed, the terminal device may determine that the dedicated timing offset value at this time is O-Yms. If the cell level timing offset value is o=39 ms and the first value is y= -10ms, then the dedicated timing offset value may be determined to be 39- (-10) =49 ms.

In this embodiment, if the range of the first value is [ -15,15]Assuming that the unit of the first value is Xms (X. Gtoreq.1), the first information indicating the first value requires 1+log ₂ (16/X) bits. Wherein log ₂ (16/X) represents the range [0,15 ]]The number of bits required, an additional 1 bit, is used to extend the range of values to [ -15,15]. When x=1 ms, the signaling overhead required to indicate the first value is 1+log ₂ (16/1) bits. In comparison with directly updating the dedicated timing offset value, e.g., taking the example of using one range of values to cover all scenes, i.e., [0 ]]–[542]ms corresponds to or supports all scenarios, if a 1ms quantization granularity is employed, a 10 bit signaling overhead is required. The method provided by the application can replace the bits occupied by the special time sequence offset value with the bits occupied by the first numerical value, such as X=At 1ms, the LEO and/or MEO scene indicates that the first value requires a signaling overhead of 1+log ₂ (16/1) =5 bits. Wherein the most significant of the 5 bits is used to indicate the sign of the first value. That is, because the value range of the first numerical value is smaller than the value range of the dedicated time sequence offset value, the method provided by the application can reduce signaling overhead caused when the network device indicates the dedicated time sequence offset value to the terminal device, and further, can improve system performance on the basis of enhancing scheduling flexibility.

The present embodiment rounds the first difference up to 2 ⁿ -1 = 7ms, obtaining the maximum value of the first value in the LEO and/or MEO scene, i.e. the range of values of the first value in the LEO and/or MEO scene is [0,15 ]]ms. The maximum value of the first numerical value is designed to be a numerical value larger than 14, namely, the maximum value of the first numerical value is designed to be a numerical value larger than 2 times of the first difference value, so that the special time sequence offset value finally obtained by the terminal equipment can be ensured to be smaller than the difference value between the cell-level time sequence offset value and the first difference value, and the accuracy of the special time sequence offset value is improved.

For example, if the base station configures the cell-level timing offset value to be Oms and configures the terminal device with the first value to be Yms after the initial access is completed, the terminal device may determine that the dedicated timing offset value at this time is O-Yms. If the cell level timing offset value is o=39 ms and the first value is y=10 ms, then the dedicated timing offset value may be determined to be 39-10=29 ms.

In this embodiment, if the range of the first value is designed as [0,15 ]]Assuming that the unit of the first value is Xms (X. Gtoreq.1), the first information indicating the first value requires log ₂ (16/X) bits. Wherein log ₂ (16/X) represents the range [0,15 ]]The number of bits required. When x=1 ms, the signaling overhead required to indicate the first value is log ₂ (16/1) bits. In comparison with directly updating the dedicated timing offset value, e.g., taking the example of using one range of values to cover all scenes, i.e., [0 ]]–[542]ms corresponds to or supports all scenes if 1ms quantization is employedGranularity, then 10 bits of signaling overhead is required. The method provided by the application can replace the bits occupied by the special time sequence offset value with the bits occupied by the first value, for example, when x=1 ms, the LEO and/or MEO scene indicates that the signaling overhead required by the first value is log ₂ (16/1) =4 bits. That is, because the value range of the first numerical value is smaller than the value range of the dedicated time sequence offset value, the method provided by the application can reduce signaling overhead caused when the network device indicates the dedicated time sequence offset value to the terminal device, and further, can improve system performance on the basis of enhancing scheduling flexibility. In addition, the value range of the first value is [ -15,15]In contrast, the range of the first value is designed to be [0,15 ]]Not only can the robustness of indicating the dedicated timing offset value by means of the first value be ensured, but also the 1-bit overhead for indicating the sign of the first value can be saved, and further the signaling overhead can be further reduced.

Example 5:

when the network device configures the dedicated timing offset value for the terminal device by indicating the difference between the cell level timing offset value and the dedicated timing offset value, the terminal device needs to calculate the dedicated timing offset value based on the cell level timing offset value. However, in the NTN system, since the satellite moves continuously, the maximum RTT from the reference point to the UE in the coverage area of the cell may change continuously, so that the cell-level timing offset values broadcasted by the base station at different times may also be different. According to the method and the device for calculating the special time sequence offset value, the cell-level time sequence offset value used for calculating the special time sequence offset value is designed to be the cell-level time sequence offset value which is received by the terminal equipment last time before the terminal equipment receives the first numerical value, and the accuracy of the special time sequence offset value determined by the terminal equipment can be improved.

Fig. 11 is a schematic diagram of a cell-level timing offset value for determining the dedicated timing offset value provided in an embodiment of the present application.

As shown in fig. 11, the base stations are respectively at t ₀ 、t ₁ And t ₃ Time broadcast cell-level timing offset value 1, cell-level timing offsetThe value 2 and the cell-level timing offset value 3, and the cell-level timing offset value 1, the cell-level timing offset value 2, and the cell-level timing offset value 3 broadcast by the base station may be different due to satellite motion. In addition, at t ₂ At this time, the base station configures a first value for the UE through MAC CE signaling, and Δt represents a delay from the base station to the UE. When the UE is at t ₂ After receiving the first information indicating the first value at +Δt, it is necessary to base t on ₁ And calculating the value of the special time sequence offset value by the time +delta t received cell-level time sequence offset value 1. That is, even if the UE is at t ₃ The updated cell-level timing offset value 3 is received at time +Δt without updating the dedicated timing offset value calculated previously.

The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present application within the scope of the technical concept of the present application, and all the simple modifications belong to the protection scope of the present application. For example, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in detail. As another example, any combination of the various embodiments of the present application may be made without departing from the spirit of the present application, which should also be considered as disclosed herein.

It should be further understood that, in the various method embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic of the processes, and should not constitute any limitation on the implementation process of the embodiments of the present application. Further, in the embodiments of the present application, the terms "downlink" and "uplink" are used to indicate a transmission direction of a signal or data, where "downlink" is used to indicate that the transmission direction of the signal or data is a first direction of a user equipment transmitted from a station to a cell, and "uplink" is used to indicate that the transmission direction of the signal or data is a second direction of a user equipment transmitted from a cell to a station, for example, "downlink signal" indicates that the transmission direction of the signal is the first direction. In addition, in the embodiment of the present application, the term "and/or" is merely an association relationship describing the association object, which means that three relationships may exist. Specifically, a and/or B may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

Method embodiments of the present application are described in detail above in connection with fig. 1-11, and apparatus embodiments of the present application are described in detail below in connection with fig. 12-15.

Fig. 12 is a schematic block diagram of a terminal device 300 of an embodiment of the present application.

As shown in fig. 12, the terminal device 300 may include:

a receiving unit 310 for receiving the first information; the first information is used for indicating a first numerical value, the value range of the first numerical value is determined according to a maximum round trip time and a minimum round trip time, the maximum round trip time comprises round trip time RTT between a reference point and a position which is in a cell coverage range and is farthest from the reference point, and the minimum round trip time comprises RTT between the reference point and a position which is in the cell coverage range and is closest to the reference point;

a determining unit 320, configured to determine a dedicated timing offset value of the terminal device based on the first value.

In some embodiments, the determining unit 320 is specifically configured to:

In some embodiments, the receiving unit 310 is further configured to:

In some embodiments, the cell-level timing offset value is the last updated cell-level timing offset value before the terminal device received the first information.

In some embodiments, m=2 ^m -1; wherein M is the smallest integer that makes M.gtoreq.K.

In some embodiments, the method is applicable to geosynchronous orbit GEO scenarios and/or high altitude platform station HAPS scenarios.

In some embodiments, n=2 ⁿ -1; wherein N is a minimum integer such that N.gtoreq.2K.

In some embodiments, the method is applicable to medium earth orbit MEO scenes and/or low earth orbit LEO scenes.

It should be understood that apparatus embodiments and method embodiments may correspond with each other and that similar descriptions may refer to the method embodiments. Specifically, the terminal device 300 shown in fig. 12 may correspond to a corresponding main body in performing the method 200 in the embodiment of the present application, and the foregoing and other operations and/or functions of each unit in the terminal device 300 are respectively for implementing the corresponding flow in each method in fig. 8, which is not described herein for brevity.

Fig. 13 is a schematic block diagram of a network device 400 of an embodiment of the present application.

As shown in fig. 13, the network device 400 may include:

a transmitting unit 410 for transmitting the first information; the first information is used for indicating a first value, the value range of the first value is determined according to a maximum round trip time and a minimum round trip time, the maximum round trip time comprises round trip time RTT between a reference point and a position which is located in a cell coverage range and is farthest from the reference point, the minimum round trip time comprises RTT between the reference point and a position which is located in the cell coverage range and is closest to the reference point, and the first value is used for determining a special time sequence offset value of terminal equipment.

In some embodiments, the dedicated timing offset value is a difference between a cell level timing offset value and the first value.

In some embodiments, the sending unit 410 is further configured to:

and sending second information, wherein the second information is used for indicating the cell-level time sequence offset value.

In some embodiments, the cell-level timing offset value is the timing offset value that was last updated prior to the network device sending the first information.

It should be understood that apparatus embodiments and method embodiments may correspond with each other and that similar descriptions may refer to the method embodiments. Specifically, the network device 400 shown in fig. 13 may correspond to a corresponding main body in performing the method 200 in the embodiment of the present application, and the foregoing and other operations and/or functions of each unit in the network device 400 are respectively for implementing the corresponding flow in each method in fig. 8, which are not described herein for brevity.

The communication device of the embodiments of the present application is described above from the perspective of the functional module in conjunction with the accompanying drawings. It should be understood that the functional module may be implemented in hardware, or may be implemented by instructions in software, or may be implemented by a combination of hardware and software modules. Specifically, each step of the method embodiments in the embodiments of the present application may be implemented by an integrated logic circuit of hardware in a processor and/or an instruction in software form, and the steps of the method disclosed in connection with the embodiments of the present application may be directly implemented as a hardware decoding processor or implemented by a combination of hardware and software modules in the decoding processor. Alternatively, the software modules may be located in a well-established storage medium in the art such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, and the like. The storage medium is located in a memory, and the processor reads information in the memory, and in combination with hardware, performs the steps in the above method embodiments.

For example, the processing unit and the communication unit referred to above may be implemented by a processor and a transceiver, respectively.

Fig. 14 is a schematic structural diagram of a communication device 500 of an embodiment of the present application.

As shown in fig. 14, the communication device 500 may include a processor 510.

Wherein the processor 510 may call and run a computer program from a memory to implement the methods of embodiments of the present application.

As shown in fig. 14, the communication device 500 may also include a memory 520.

The memory 520 may be used for storing instruction information, and may also be used for storing code, instructions, etc. to be executed by the processor 510. Wherein the processor 510 may call and run a computer program from the memory 520 to implement the methods in embodiments of the present application. The memory 520 may be a separate device from the processor 510 or may be integrated into the processor 510.

As shown in fig. 14, the communication device 500 may further include a transceiver 530.

The processor 510 may control the transceiver 530 to communicate with other devices, and in particular, may send information or data to other devices or receive information or data sent by other devices. The transceiver 530 may include a transmitter and a receiver. The transceiver 530 may further include antennas, the number of which may be one or more.

It should be appreciated that the various components in the communication device 500 are connected by a bus system that includes a power bus, a control bus, and a status signal bus in addition to a data bus.

It should also be understood that the communication device 500 may be a terminal device of the embodiment of the present application, and the communication device 500 may implement respective flows implemented by the terminal device in the respective methods of the embodiment of the present application, that is, the communication device 500 of the embodiment of the present application may correspond to the terminal device 300 of the embodiment of the present application, and may correspond to a respective main body performing the method 200 according to the embodiment of the present application, which is not described herein for brevity. Similarly, the communication device 500 may be a network device of the embodiments of the present application, and the communication device 500 may implement respective flows implemented by the network device in the respective methods of the embodiments of the present application. That is, the communication device 500 of the embodiment of the present application may correspond to the network device 400 of the embodiment of the present application, and may correspond to a corresponding body in performing the method 200 according to the embodiment of the present application, which is not described herein for brevity.

In addition, the embodiment of the application also provides a chip.

For example, the chip may be an integrated circuit chip having signal processing capabilities, and may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. The chip may also be referred to as a system-on-chip, a system-on-chip or a system-on-chip, etc. Alternatively, the chip may be applied to various communication devices, so that the communication device mounted with the chip can perform the methods, steps and logic blocks disclosed in the embodiments of the present application.

Fig. 15 is a schematic structural diagram of a chip 600 according to an embodiment of the present application.

As shown in fig. 15, the chip 600 includes a processor 610.

Wherein the processor 610 may call and run a computer program from a memory to implement the methods in embodiments of the present application.

As shown in fig. 15, the chip 600 may further include a memory 620.

Wherein the processor 610 may call and run a computer program from the memory 620 to implement the methods in embodiments of the present application. The memory 620 may be used to store instruction information and may also be used to store code, instructions, etc. for execution by the processor 610. The memory 620 may be a separate device from the processor 610 or may be integrated into the processor 610.

As shown in fig. 15, the chip 600 may further include an input interface 630.

The processor 610 may control the input interface 630 to communicate with other devices or chips, and in particular, may acquire information or data sent by the other devices or chips.

As shown in fig. 15, the chip 600 may further include an output interface 640.

Wherein the processor 610 may control the output interface 640 to communicate with other devices or chips, and in particular, may output information or data to other devices or chips.

It should be understood that the chip 600 may be applied to a network device in the embodiment of the present application, and the chip may implement a corresponding flow implemented by the network device in each method in the embodiment of the present application, or may implement a corresponding flow implemented by a terminal device in each method in the embodiment of the present application, which is not described herein for brevity.

It should also be appreciated that the various components in the chip 600 are connected by a bus system that includes a power bus, a control bus, and a status signal bus in addition to a data bus.

The processors referred to above may include, but are not limited to:

a general purpose processor, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like.

The processor may be configured to implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present application. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory or erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.

The above references to memory include, but are not limited to:

volatile memory and/or nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), and Direct memory bus RAM (DR RAM).

It should be noted that the memory described herein is intended to comprise these and any other suitable types of memory.

There is also provided in an embodiment of the present application a computer-readable storage medium for storing a computer program. The computer readable storage medium stores one or more programs, the one or more programs comprising instructions, which when executed by a portable electronic device comprising a plurality of application programs, enable the portable electronic device to perform the wireless communication methods provided herein. Optionally, the computer readable storage medium may be applied to a network device in the embodiments of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the network device in each method in the embodiments of the present application, which is not described herein for brevity. Optionally, the computer readable storage medium may be applied to a mobile terminal/terminal device in the embodiments of the present application, and the computer program causes a computer to execute a corresponding procedure implemented by the mobile terminal/terminal device in each method of the embodiments of the present application, which is not described herein for brevity.

A computer program product, including a computer program, is also provided in an embodiment of the present application. Optionally, the computer program product may be applied to a network device in the embodiments of the present application, and the computer program causes a computer to execute a corresponding flow implemented by the network device in each method in the embodiments of the present application, which is not described herein for brevity. Optionally, the computer program product may be applied to a mobile terminal/terminal device in the embodiments of the present application, and the computer program causes a computer to execute corresponding processes implemented by the mobile terminal/terminal device in the methods in the embodiments of the present application, which are not described herein for brevity.

A computer program is also provided in an embodiment of the present application. The computer program, when executed by a computer, enables the computer to perform the wireless communication method provided herein. Optionally, the computer program may be applied to a network device in the embodiments of the present application, and when the computer program runs on a computer, the computer is caused to execute a corresponding flow implemented by the network device in each method in the embodiments of the present application, which is not described herein for brevity. Optionally, the computer program may be applied to a mobile terminal/terminal device in the embodiments of the present application, and when the computer program runs on a computer, the computer is caused to execute corresponding processes implemented by the mobile terminal/terminal device in each method in the embodiments of the present application, which are not described herein for brevity.

The embodiment of the present application further provides a communication system, which may include the above-mentioned terminal device and network device, so as to form the communication system 100 shown in fig. 1, which is not described herein for brevity. It should be noted that the term "system" and the like herein may also be referred to as "network management architecture" or "network system" and the like.

It is also to be understood that the terminology used in the embodiments of the present application and the appended claims is for the purpose of describing particular embodiments only, and is not intended to be limiting of the embodiments of the present application. For example, as used in the examples and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Those of skill in the art will appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the embodiments of the present application. If implemented as a software functional unit and sold or used as a stand-alone product, may be stored on a computer readable storage medium. Based on such understanding, the technical solution of the embodiments of the present application may be essentially or, what contributes to the prior art, or part of the technical solution may be embodied in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method of the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk.

Those skilled in the art will further appreciate that, for convenience and brevity, specific working procedures of the above-described system, apparatus and unit may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein. In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods may be implemented in other ways. For example, the division of units or modules or components in the above-described apparatus embodiments is merely a logic function division, and there may be another division manner in actual implementation, for example, multiple units or modules or components may be combined or may be integrated into another system, or some units or modules or components may be omitted or not performed. As another example, the units/modules/components described above as separate/display components may or may not be physically separate, i.e., may be located in one place, or may be distributed over multiple network elements. Some or all of the units/modules/components may be selected according to actual needs to achieve the purposes of the embodiments of the present application. Finally, it is pointed out that the coupling or direct coupling or communication connection between the various elements shown or discussed above can be an indirect coupling or communication connection via interfaces, devices or elements, which can be in electrical, mechanical or other forms.

The foregoing is merely a specific implementation of the embodiments of the present application, but the protection scope of the embodiments of the present application is not limited thereto, and any person skilled in the art may easily think about changes or substitutions within the technical scope of the embodiments of the present application, and all changes and substitutions are included in the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.

Claims

A method of wireless communication, the method being applicable to a terminal device, the method comprising:

receiving first information; the first information is used for indicating a first numerical value, the value range of the first numerical value is determined according to the maximum round trip time and the minimum round trip time, the maximum round trip time is Round Trip Time (RTT) between a reference point and a position which is in a cell coverage range and is farthest from the reference point, and the minimum round trip time is RTT between the reference point and a position which is in the cell coverage range and is closest to the reference point;

and determining a special time sequence offset value of the terminal equipment based on the first numerical value.
The method of claim 1, wherein the range of values for the first value is determined based on a first difference between the maximum round trip delay and the minimum round trip delay.
The method of claim 2, wherein the determining the dedicated timing offset value for the terminal device based on the first value comprises:

determining a difference between a cell level timing offset value and the first value as the dedicated timing offset value; the cell level timing offset value is greater than or equal to the maximum round trip delay.
A method according to claim 3, characterized in that the method further comprises:

second information is received, the second information being used to indicate the cell-level timing offset value.
A method according to claim 3, wherein the cell-level timing offset value is the last updated cell-level timing offset value before the terminal device received the first information.
The method of any one of claims 2 to 5, wherein the first value is in the range of [0, m ]; wherein M is greater than or equal to K, and K represents the first difference.
The method of claim 6, wherein M = 2 ^m -1; wherein M is the smallest integer that makes M.gtoreq.K.
The method according to claim 6, wherein the method is applicable to geosynchronous orbit GEO scenarios and/or high altitude platform station HAPS scenarios.
The method according to any one of claims 2 to 5, wherein the first value is in the range [ -N, N ] or [0, N ]; wherein N is equal to or greater than 2K, and K represents the first difference.
The method of claim 9, wherein N = 2 ⁿ -1; wherein N is a minimum integer such that N.gtoreq.2K.
The method according to claim 9, characterized in that the method is applicable to medium earth orbit MEO scenes and/or low earth orbit LEO scenes.
A method of wireless communication, the method being adapted for use with a network device, the method comprising:

transmitting first information; the first information is used for indicating a first value, the value range of the first value is determined according to a maximum round trip time and a minimum round trip time, the maximum round trip time comprises round trip time RTT between a reference point and a position which is located in a cell coverage range and is farthest from the reference point, the minimum round trip time comprises RTT between the reference point and a position which is located in the cell coverage range and is closest to the reference point, and the first value is used for determining a special time sequence offset value of terminal equipment.
The method of claim 12, wherein the range of values for the first value is determined based on a first difference between the maximum round trip delay and the minimum round trip delay.
The method of claim 13, wherein the dedicated timing offset value is a difference between a cell level timing offset value and the first value.
The method of claim 14, wherein the method further comprises:

and sending second information, wherein the second information is used for indicating the cell-level time sequence offset value.
The method of claim 14, wherein the cell-level timing offset value is a last updated cell-level timing offset value prior to the network device transmitting the first information.
The method according to any one of claims 13 to 16, wherein the first value has a value in the range of [0, m ]; wherein M is greater than or equal to K, and K represents the first difference.
The method of claim 17, wherein M = 2 ^m -1; wherein M is the smallest integer that makes M.gtoreq.K.
The method according to claim 17, wherein the method is applicable to geosynchronous orbit GEO scenarios and/or high altitude platform station HAPS scenarios.
The method according to any one of claims 13 to 16, wherein the first value is in the range [ -N, N ] or [0, N ]; wherein N is equal to or greater than 2K, and K represents the first difference.
The method of claim 20, wherein N = 2 ⁿ -1; wherein N is a minimum integer such that N.gtoreq.2K.
The method according to claim 20, wherein the method is applicable to medium earth orbit MEO scenes and/or low earth orbit LEO scenes.
A terminal device, comprising:

a receiving unit configured to receive first information; the first information is used for indicating a first numerical value, the value range of the first numerical value is determined according to a maximum round trip time and a minimum round trip time, the maximum round trip time comprises round trip time RTT between a reference point and a position which is in a cell coverage range and is farthest from the reference point, and the minimum round trip time comprises RTT between the reference point and a position which is in the cell coverage range and is closest to the reference point;

and the determining unit is used for determining a special time sequence offset value of the terminal equipment based on the first numerical value.
A network device, comprising:

a transmitting unit configured to transmit first information; the first information is used for indicating a first value, the value range of the first value is determined according to a maximum round trip time and a minimum round trip time, the maximum round trip time comprises round trip time RTT between a reference point and a position which is located in a cell coverage range and is farthest from the reference point, the minimum round trip time comprises RTT between the reference point and a position which is located in the cell coverage range and is closest to the reference point, and the first value is used for determining a special time sequence offset value of terminal equipment.
A terminal device, comprising:

a processor and a memory for storing a computer program, the processor being for invoking and running the computer program stored in the memory to perform the method of any of claims 1 to 11.
A network device, comprising:

a processor and a memory for storing a computer program, the processor being for invoking and running the computer program stored in the memory to perform the method of any of claims 12 to 22.
A chip, comprising:

a processor for calling and running a computer program from a memory, causing a device on which the chip is mounted to perform the method of any one of claims 1 to 11 or the method of any one of claims 12 to 22.
A computer readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 11 or the method of any one of claims 12 to 22.
A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 11 or the method of any one of claims 12 to 22.
A computer program, characterized in that the computer program causes a computer to perform the method of any one of claims 1 to 11 or the method of any one of claims 12 to 22.