WO2023077531A1

WO2023077531A1 - Wireless communication method, terminal device, and network device

Info

Publication number: WO2023077531A1
Application number: PCT/CN2021/129601
Authority: WO
Inventors: 赵楠德; 马东俊
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-11-04
Filing date: 2021-11-09
Publication date: 2023-05-11
Also published as: CN117501792A

Abstract

Embodiments of the present application provide a wireless communication method, a terminal device, and a network device. The method comprises: receiving first information, the first information being used for indicating a first numerical value, wherein the value range of the first numerical value is determined according to a maximum round-trip time (RTT) and a minimum RTT, the maximum RTT comprises an RTT between a reference point and a position that is within the coverage of a cell and that is farthest from the reference point, and the minimum RTT comprises an RTT between the reference point and a position that is within the coverage of a cell and that is closest to the reference point; and determining a dedicated timing offset value of a terminal device on the basis of the first numerical value. In the method provided in the present application, system performance may be improved on the basis of enhancing scheduling flexibility.

Description

Wireless communication method, terminal device and network device

technical field

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

Background technique

In the New Radio (NR) system, consider using Non-Terrestrial Networks (NTN) to provide communication services to users. That is, communication services can be provided to ground users through satellites in the NTN. Compared with terrestrial cellular network communication, satellite communication has many unique advantages. However, compared with the cellular network used by traditional NR, the delay between the terminal equipment and the satellite in NTN is larger, usually tens to hundreds of milliseconds, resulting in a larger amount of timing advance (TA) adjustment in NTN . Therefore, it is necessary to introduce a timing offset value to enhance the uplink and downlink timing relationship and avoid confusion of the timing relationship. For example, assuming that the network device schedules the terminal device to send uplink data at time slot n, at this time, the terminal device needs to increase the time slot n+Koffset to send uplink data, so as to avoid the uplink transmission of the terminal device from occurring before the downlink scheduling. Wherein, Koffset is an enhanced timing offset value, and Koffset is greater than or equal to the TA of the terminal device.

Specifically, for a terminal device in the initial access process, since the network device lacks relevant information about the terminal device, a cell-level timing offset value can be configured through a system message, and the cell-level timing offset value needs to cover the reference point to Round Trip Time (RTT) between the farthest locations within the coverage of the cell. After the initial access is completed, the network device can further configure the terminal device level for the terminal device through the media access control (Media Access Control, MAC) control element (Control Element, CE) based on the RTT between the reference point and the terminal device. Timing offset value to enhance scheduling flexibility. That is to say, after the initial access is completed, the network device needs to reconfigure or even update the timing offset value of the terminal equipment level for the terminal equipment, but directly configuring or updating the timing offset value of the terminal equipment level for the terminal equipment will cause a large Signaling overhead reduces system performance.

Therefore, there is an urgent need in the art for a wireless communication method to improve system performance on the basis of enhanced scheduling flexibility.

Contents of the invention

Embodiments of the present application provide a wireless communication method, a terminal device, and a network device, which can improve system performance on the basis of enhancing scheduling flexibility.

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

receiving first information; the first information is used to indicate a first value, the value range of the first value is determined according to the maximum round-trip delay and the minimum round-trip delay, and the maximum round-trip delay includes a reference point and a cell coverage The round-trip time delay RTT between the position within the range and the farthest from the reference point, the minimum round-trip time delay includes the distance between the reference point and the position within the coverage of the cell and the position closest to the reference point RTT between;

Determining a dedicated timing offset value of the terminal device based on the first value.

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

Sending first information; the first information is used to indicate a first value, the value range of the first value is determined according to the maximum round-trip delay and the minimum round-trip delay, and the maximum round-trip delay includes a reference point and a cell coverage The round-trip time delay RTT between the position within the range and the farthest from the reference point, the minimum round-trip time delay includes the distance between the reference point and the position within the coverage of the cell and the position closest to the reference point RTT between, the first value is used to determine the dedicated timing offset value of the terminal device.

In a third aspect, the present application provides a terminal device configured to execute the method in the foregoing first aspect or various implementation manners thereof. Specifically, the terminal device includes a functional module configured to execute the method in the foregoing first aspect or its various implementation manners.

In an implementation manner, the terminal device may include a processing unit configured to perform functions related to information processing. For example, the processing unit may be a processor.

In an implementation manner, the terminal device may include a sending unit and/or a receiving unit. The sending unit is used to perform functions related to sending, and the receiving unit is used to perform functions related to receiving. For example, the sending unit may be a transmitter or transmitter, and the receiving unit may be a receiver or receiver. For another example, the terminal device is a communication chip, the sending unit may be an input circuit or interface of the communication chip, and the sending unit may be an output circuit or interface of the communication chip.

In a fourth aspect, the present application provides a network device configured to execute the method in the foregoing second aspect or various implementation manners thereof. Specifically, the network device includes a functional module configured to execute the method in the above second aspect or each implementation manner thereof.

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

In an implementation manner, the network device may include a sending unit and/or a receiving unit. The sending unit is used to perform functions related to sending, and the receiving unit is used to perform functions related to receiving. For example, the sending unit may be a transmitter or transmitter, and the receiving unit may be a receiver or receiver. For another example, the network device is a communication chip, the receiving unit may be an input circuit or interface of the communication chip, and the sending unit may be an output circuit or interface of the communication chip.

In a fifth aspect, the present application provides a terminal device, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, so as to execute the method in the above first aspect or each implementation manner thereof.

In an implementation manner, there are one or more processors, and one or more memories.

In an implementation manner, the memory may be integrated with the processor, or the memory may be separated from the processor.

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

In a sixth aspect, the present application provides a network device, including a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory, so as to execute the method in the above second aspect or each implementation manner 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 configured to implement any one of the above-mentioned first aspect to the second aspect or a method in each implementation manner thereof. Specifically, the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes any one of the above-mentioned first to second aspects or various implementations thereof method in .

In an eighth aspect, the present application provides a computer-readable storage medium for storing a computer program, and the computer program enables the computer to execute any one of the above-mentioned first to second aspects or the method in each implementation manner thereof .

In a ninth aspect, the present application provides a computer program product, including computer program instructions, the computer program instructions cause a computer to execute any one of the above first to second aspects or the method in each implementation manner.

In a tenth aspect, the present application provides a computer program, which, when run on a computer, causes the computer to execute any one of the above-mentioned first to second aspects or the method in each implementation manner.

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, the terminal device receives the After the first information, the dedicated timing offset value can be determined based on the first value indicated by the first information. Compared with directly updating the dedicated timing offset value of the terminal device, the method provided in this application can A value is designed to occupy fewer bits than the dedicated timing offset value, which is beneficial to reduce the signaling overhead caused by the network device indicating the terminal device's dedicated timing offset value to the terminal device, and thus can enhance scheduling flexibility. On the basis of security, improve system performance.

Description of drawings

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

FIG. 4 and FIG. 5 respectively show schematic diagrams of NTN scenarios based on transparent transmission forwarding satellites and regenerative forwarding satellites.

FIG. 6 is a schematic diagram of cell coverage under the NTN system provided by an embodiment of the present application.

FIG. 7 is a schematic diagram of uplink and downlink alignment with a base station as a reference point provided by an embodiment of the present application.

FIG. 8 is a schematic flowchart of a wireless communication method provided by an embodiment of the present application.

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

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

FIG. 11 is a schematic diagram of a cell-level timing offset value used for determining a dedicated timing offset value of a terminal device provided by an embodiment of the present application.

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

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

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

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

Detailed ways

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 of an embodiment of the present application.

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

It should be understood that the embodiment of the present application is only described by using the communication system 100 as an example, but the embodiment of the present application is not limited thereto. That is to say, the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Long Term Evolution (Long Term Evolution, LTE) system, LTE Time Division Duplex (Time Division Duplex, TDD), Universal Mobile Communication System (Universal Mobile Telecommunication System, UMTS), 5G communication system (also known as New Radio (NR) communication system), or future communication systems, etc.

In the communication system 100 shown in FIG. 1 , the network device 120 may be an access network device that communicates with the terminal device 110 . The access network device can provide communication coverage for a specific geographical area, and can communicate with terminal devices 110 (such as UEs) located in 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 (NG RAN) device, Either a base station (gNB) in the NR system, or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device 120 can be a relay station, an access point, a vehicle-mounted device, a wearable Devices, hubs, switches, bridges, routers, or network devices in the future evolution of the Public Land Mobile Network (Public Land Mobile Network, PLMN), etc.

The terminal device 110 may be any terminal device, including but not limited to a terminal device connected to the network device 120 or other terminal devices by wire or wirelessly.

For example, the terminal equipment 110 may refer to an access terminal, a user equipment (User Equipment, UE), a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, user agent, or user device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks or terminal devices in future evolution networks, etc.

The terminal device 110 can be used for device-to-device (Device to Device, D2D) communication.

The wireless communication system 100 may also include a core network device 130 that communicates with the base station. The core network device 130 may be a 5G core network (5G Core, 5GC) device, for example, Access and Mobility Management Function (Access and Mobility Management Function , AMF), and for example, authentication server function (Authentication Server Function, AUSF), and for example, user plane function (User Plane Function, UPF), and for example, 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 data gateway (Session Management Function+Core Packet Gateway, SMF+PGW- C) equipment. It should be understood that SMF+PGW-C can realize the functions of SMF and PGW-C at the same time. In the process of network evolution, the above-mentioned core network equipment may be called by other names, or a new network entity may be formed by dividing functions of the core network, which is not limited in this embodiment of the present application.

Various functional units in the communication system 100 may also establish a connection through a next generation network (next generation, NG) interface to implement communication.

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

Figure 1 exemplarily shows a base station, a core network device, and two terminal devices. Optionally, the wireless communication system 100 may include multiple base station devices and each base station may include other numbers of terminals within the coverage area. The device is not limited in the embodiment of this application.

In the New Radio (NR) system, consider using Non-Terrestrial Networks (NTN) to provide communication services to users. NTN generally adopts satellite communication to provide communication services to ground users. Compared with terrestrial cellular network communication, satellite communication has many unique advantages. First of all, satellite communication is not restricted by the user's region. For example, general land communication cannot cover areas such as oceans, mountains, deserts, etc. that cannot be equipped with communication equipment or are not covered by communication due to sparse population. For satellite communication, due to a Satellites can cover a large area of the ground, and satellites can orbit the earth, so theoretically every corner of the earth can be covered by satellite communications. Secondly, satellite communication has great social value. Satellite communication can be covered at a lower cost in remote mountainous areas, poor and backward countries or regions, so that people in these regions can enjoy advanced voice communication and mobile Internet technology, which is conducive to narrowing the digital gap with developed regions and promoting development of these areas. Thirdly, the distance of satellite communication is long, and the cost of communication does not increase significantly with the increase of communication distance; finally, the stability of satellite communication is high, and it is not limited by natural disasters.

FIG. 2 is a schematic structural diagram of another communication system provided by an embodiment of the present application.

As shown in FIG. 2 , a terminal device 1101 and a satellite 1102 are included, and wireless communication can be performed between the terminal device 1101 and the satellite 1102 . The network formed between the terminal device 1101 and the satellite 1102 may also be referred to as NTN. In the architecture of the communication system shown in FIG. 2 , the satellite 1102 may have the function of a base station, and the terminal device 1101 and the satellite 1102 may communicate directly. Under the system architecture, the satellite 1102 can be referred to as a network device. In some embodiments of the present application, the communication system may include multiple network devices 1102, and the coverage of each network device 1102 may include other numbers of terminal devices, which is not limited in this embodiment of the present application.

FIG. 3 is a schematic structural diagram of another communication system provided by an embodiment of the present application.

As shown in FIG. 3 , it includes a terminal device 1201 , a satellite 1202 and a base station 1203 , 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 among the terminal equipment 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 the communication between the terminal device 1201 and the base station 1203 needs to be relayed through the satellite 1202 . Under this system architecture, the base station 1203 may be called a network device. In some embodiments of the present application, the communication system may include multiple network devices 1203, and the coverage of each network device 1203 may include other numbers of terminal devices, which is not limited in this embodiment of the present application. The network device 1203 may be the network device 120 in FIG. 1 .

It should be understood that the aforementioned satellite 1102 or satellite 1202 includes but is not limited to:

Low-Earth Orbit (LEO) satellites, Medium-Earth Orbit (MEO) satellites, Geostationary Earth Orbit (GEO) satellites, High Elliptical Orbit (HEO) satellites, etc. wait. Satellites can use multiple beams to cover the ground. For example, a satellite can form dozens or even hundreds of beams to cover the ground. In other words, a satellite beam can cover a ground area with a diameter of tens to hundreds of kilometers to ensure satellite coverage and improve the system capacity of the entire satellite communication system.

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

Usually, in order to ensure satellite coverage and improve the system capacity of the entire satellite communication system, satellites use multiple beams to cover the ground. A satellite can form dozens or even hundreds of beams to cover the ground; a satellite beam can cover tens of beams in diameter. to a ground area of hundreds of kilometers.

It should be noted that FIG. 1 to FIG. 3 are only illustrations of systems applicable to this application, and of course, the method shown in the embodiment of this application may also be applicable to other systems. Furthermore, the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship. It should also be understood that the "indication" mentioned in the embodiments of the present application may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.

Satellites can be divided into two types based on the functions they provide: transparent payload and regenerative payload. For transparent transponder satellites, it only provides the functions of radio frequency filtering, frequency conversion and amplification, and only provides transparent transponder of signals without changing the waveform signal it transponders. For regenerative transponder satellites, in addition to providing radio frequency filtering, frequency conversion and amplification functions, it can also provide demodulation/decoding, routing/conversion, coding/modulation functions, which have part or all of the functions of the base station.

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

As shown in Figure 4, for the NTN scenario based on transparent transmission and forwarding satellites, the communication between the gateway and the satellite is through the feeder link (Feeder link), and the communication between the satellite and the terminal can be through the service link (service link). As shown in Figure 5, for the NTN scenario based on regenerative and forwarding satellites, the satellites communicate with each other through the InterStar link, the gateway and the satellite communicate through the feeder link, and the satellite and the terminal They can communicate with each other through the service link. Wherein, the feeder link may also be referred to as a feeder link.

With people's pursuit of speed, delay, high-speed mobility, energy efficiency, and the diversity and complexity of services in future life, the 3GPP international standards organization began to develop 5G. The main application scenarios of 5G include: Enhanced Mobile Broadband (Enhance Mobile Broadband, eMBB), Ultra-Reliable and Low Latency Communication (URLLC), Massive machine type of communication (mMTC) ). Among them, eMBB aims at users' access to multimedia content, services and data, and its demand is growing rapidly. Because eMBB may be deployed in different scenarios. For example, indoors, urban areas, rural areas, etc. have relatively large differences in capabilities and requirements, so they cannot be generalized, and can be analyzed in detail in combination with specific deployment scenarios. Typical applications of URLLC include: industrial automation, electric power automation, telemedicine operations (surgery), traffic safety guarantee, etc. The typical characteristics of mMTC include: high connection density, small data volume, delay-insensitive services, low cost and long service life of modules, etc.

It should be understood that Fig. 1 to Fig. 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 an unmanned aircraft system (Unmanned Aircraft System).

Specifically, the satellites in FIGS. 2 to 5 can be replaced with UAS platforms. For example, UAS platforms include, but are not limited to, High Altitude Platform Stations (HAPS).

In order to facilitate the understanding of the scheme of this application, the content related to the cell coverage in the NTN system will be described below.

As shown in Figure 6, the field of view of the 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, and the coverage of each beam Can be called cell coverage and the beam is usually elliptical.

It should be noted that, for ease of illustration, FIG. 6 only shows the coverage of one beam. In other alternative embodiments, multiple cells may be formed by multiple beams, which is not specifically limited in this application.

The cell coverage of different types of satellites (including HAPS) is exemplified below in conjunction with Table 1 and Table 2:

Table 1. Relevant parameters of different types of satellites

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

Table 2. Related parameters in GEO and LEO scenarios

As shown in Table 2, when the minimum elevation angles from the base station and the terminal equipment to the satellite are determined, the maximum size of the cell coverage, the maximum distance from the base station and the terminal equipment to the satellite, the maximum round-trip delay, and the maximum The difference between the delay and the minimum delay may be fixed.

In order to facilitate the understanding of the solution provided by the present application, the content related to uplink and downlink timing in the NTN system will be described below.

In the NTN system, the transmission delay between the base station and the user equipment (User Equipment, UE) is relatively large, which causes the uplink and downlink timing relationship between the base station and the UE side to be out of alignment. Therefore, the concept of a reference point is introduced in the NTN system, and the base station and UE adjust through TA respectively to ensure that the uplink and downlink timing relationships are aligned at the reference point. The reference point may be located at a base station, a satellite, or any position between a base station and a satellite, which is not limited in this application.

As shown in Figure 7, taking the reference point on the satellite side as an example, for the TA adjustment on the UE side, since the downlink transmission on the satellite side will introduce a delay on the service link when it reaches the UE, the UE needs to use the TA adjustment when sending uplink transmission. , to ensure that the uplink timing is aligned with the downlink timing when it arrives at the satellite. For example, the TA adjustment on the UE side needs to cover the Round Trip Time (RTT) of the serving link. At the same time, for the TA adjustment on the base station side, since the uplink transmission on the satellite side will introduce a delay on the feeder link when it reaches the base station, the base station needs to adjust the TA through the downlink transmission to ensure that the downlink timing is the same as the uplink transmission when it reaches the satellite. timing alignment. For example, TA adjustment on the base station side needs to cover the RTT of the feeder link.

It should be understood that the TA adjustment method when the reference point is located at other locations is similar to the TA adjustment method when the reference point is located on the satellite side, and will not be repeated here to avoid repetition.

Compared with the cellular network used by traditional NR, the timing advance (timing advance, TA) adjustment between the terminal equipment and the satellite in NTN is larger. Therefore, it is necessary to introduce a timing offset value to enhance the uplink and downlink timing relationship and avoid confusion of the timing relationship. For example, assuming that the network device schedules the terminal device to send uplink data at time slot n, at this time, the terminal device needs to increase the time slot n+Koffset to send uplink data, so as to avoid the uplink transmission of the terminal device from occurring before the downlink scheduling. Wherein, Koffset is an enhanced timing offset value, and Koffset is greater than or equal to the TA of the terminal device. Specifically, for a terminal device in the initial access process, since the network device lacks relevant information about the terminal device, a cell-level timing offset value can be configured through a system message, and the cell-level timing offset value needs to cover the reference point to Round Trip Time (RTT) between the farthest locations within the coverage of the cell. After the initial access is completed, the network device can further configure the terminal device level for the terminal device through the media access control (Media Access Control, MAC) control element (Control Element, CE) based on the RTT between the reference point and the terminal device. Timing offset value to enhance scheduling flexibility.

Taking the reference point on the base station side as an example, based on different satellite orbit heights, the RTT from the reference point to the UE can be calculated in different scenarios to provide the value range of Koffset. An exemplary description is given below in conjunction with Table 3.

Table 3. The value range of Koffset in different scenarios

场景Scenes	Koffset取值范围Koffset value range
HAPSHAPS	[0]–[4]ms[0]–[4]ms
LEOLEO	[4]–[49]ms[4]–[49]ms
MEOMEO	[47]–[395]ms[47]–[395]ms
GEOGEOs	[239]–[542]ms[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 scenarios can also correspond to or support the same Koffset value range, for example, one Koffset value range can be used to cover all scenarios, that is, [0]–[542]ms. Not specifically limited.

Based on the above analysis, it can be seen that after the initial access is completed, the network device needs to reconfigure or even update the timing offset value of the terminal equipment level for the terminal equipment, and when configuring or updating the timing offset value of the terminal equipment level for the terminal equipment, even if a The value range of Koffset covers all scenarios, but also causes a large signaling overhead and reduces system performance. In addition, if different scenarios correspond to or support different Koffset value ranges, it is necessary to further clarify the Koffset value ranges corresponding to or supported by different scenarios.

Based on this, the embodiments of the present application provide a wireless communication method, a terminal device, and a network device, which can improve system performance on the basis of enhancing scheduling flexibility.

Specifically, the network device may configure a dedicated timing offset value for the terminal device by means of the first value. That is to say, the terminal device may determine the dedicated timing offset value based on the cell-level timing offset value and the first value configured by the network device, where the first value may be the cell-level timing offset value relative to the dedicated timing The difference in offset values. In addition, the present application designs the value range of the first value for different NTN scenarios (GEO/MEO/LEO/UAS platforms). In addition, the latest updated cell-level timing offset value before receiving the first value is designed as the cell-level timing offset value used when calculating the dedicated timing offset value.

Fig. 8 shows a schematic flowchart of a wireless communication method 200 according to an embodiment of the present application, and the method 200 may be executed interactively by a terminal device and a network device. The terminal device shown in FIG. 2 may be the terminal device shown in FIG. 1 , and the network device shown in FIG. 2 may be the access network device shown in FIG. 1 .

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

S210, the terminal device receives the first information sent by the network device; the first information is used to indicate a first value, and the value range of the first value is determined according to the difference between the maximum round-trip delay and the minimum round-trip delay, so The maximum round-trip delay is the round-trip delay RTT between the reference point and the location within the cell coverage and the farthest from the reference point, and the minimum round-trip delay is the round-trip delay between the reference point and the cell coverage The RTT between the locations 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 based on the first value indicated by the first information value. Optionally, the unit of the first value is ms.

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, the terminal device receives the After the first information, the dedicated timing offset value can be determined based on the first value indicated by the first information. Compared with directly updating the dedicated timing offset value of the terminal device, the method provided in this application can A numerical value is designed to occupy fewer bits than the dedicated timing offset value, which is beneficial to reduce the signaling overhead caused when the network device indicates the terminal device's dedicated timing offset value to the terminal device, and further, can enhance scheduling Improve system performance on the basis of flexibility.

It should be noted that the dedicated timing offset value involved in this application can be understood as a timing offset value at the terminal equipment level or UE level. That is, the dedicated timing offset value is for the terminal device. That is to say, the first numerical value in this application is for the terminal device, that is, different terminal devices may correspond to different first numerical values, or may correspond to the same first numerical value, which is not specifically limited in this application. .

In addition, the term "indication" involved in the embodiments of the present application may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation. In connection with this application, A is the first information, and B is the first value.

It should also be understood that the present application does not limit the manner of determining the maximum round-trip delay and the minimum round-trip delay.

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 for uplink and downlink timing alignment introduced by the NTN system. Exemplarily, if the reference point is a satellite, the maximum round-trip delay and the minimum round-trip delay may include the round-trip delay of the serving link; if the reference point is a base station, the maximum round-trip delay Both the delay and the minimum round-trip delay may include the round-trip delay of the serving link and the round-trip delay of the feeder link.

In some embodiments, the value range of the first value is determined according to 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 value range determined based on the first difference.

It should be noted that, in other alternative embodiments, the value range of the first numerical value may also be determined based on other calculation results of the maximum round-trip delay and the minimum round-trip delay, and this application does not make specific details on this. limited. For example, the value range of the first value may be determined based on a ratio of the maximum round-trip delay to the minimum round-trip delay.

Optionally, the S220 may include:

The difference between the cell-level timing offset value and the first value is determined 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 between the cell-level timing offset value and the dedicated timing offset value.

Exemplarily, assuming that the value range of the first value is [0, 31] ms, the first information is used to indicate that the value of the first value is 28. After receiving the first information, the terminal device may determine the difference between the cell-level timing offset value and 28 as the dedicated timing offset value.

It should be noted that, the present application does not specifically limit the manner of obtaining the cell-level timing offset value.

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

Optionally, the method 200 may also include:

Receive second information, where the second information is used to indicate the cell-level timing offset value.

Exemplarily, the second information is a system message or a broadcast message.

Optionally, the cell-level timing offset value is a last updated cell-level timing offset value 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 last updated cell-level timing offset value before the terminal device receives the first information. That is to say, the terminal device determines the difference between the last updated cell-level timing offset value before receiving the first information and the first value as the dedicated timing offset value. It should be understood that the network device can update the cell-level timing offset value multiple times, such as updating the cell-level timing offset value periodically or aperiodically, or updating the cell-level timing offset value based on the movement of the satellite. Not specifically limited.

In this embodiment, the latest updated cell-level timing offset value before receiving the first information is designed as the cell-level timing offset value used for calculating the dedicated timing offset value, which can ensure that the base station and the terminal device are The calculation understanding of the dedicated timing offset value remains consistent, which improves system performance.

In some embodiments, the value range of the first value is [0, M]; wherein, M≧K, 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 greater than or equal to the value of the first difference.

Exemplarily, if the base station configures a cell-level timing offset value of Oms, and configures the terminal device with a first value of 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 value range of the first value is designed as [0, M], assuming that the unit of the first value is Xms (X≥1), the first value used to indicate the first value The information requires log ₂ (M+1/X) bits of signaling overhead. For example, when X=1 ms, the signaling overhead required to indicate the first value is log ₂ (M+1/1) bits. Compared with directly updating the dedicated timing offset value, the method provided in this application can replace the bits occupied by the dedicated timing offset value with the bits occupied by the first value, because the value range of the first value is relatively The value range of the dedicated timing offset value is small, therefore, the method provided by the present application can reduce the signaling overhead caused when the network device indicates the dedicated timing offset value to the terminal device, and further, can enhance scheduling flexibility to improve system performance.

Optionally, M=2 ^m -1; wherein, m is the smallest integer such that M≥K.

In this embodiment, M is designed to be equal to 2 ^m -1, and m is designed to be the smallest integer used to ensure that M≥K, which not only enables the value range of the first value to cover 0 to K within the coverage of the cell Any value in , can also reserve a certain amount of extra space, which improves the robustness of the NTN system.

Of course, in other alternative embodiments, M may also be determined in other ways, which is not specifically limited in the present application. For example, M is the value after K is rounded up.

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

In some embodiments, the value range of the first value is [-N, N] or [0, N]; wherein, N≧2K, K represents the first difference.

As an example, the present application can design the value range of the first value as [0, N], assuming that the unit of the first value is Xms (X≥1), then it is used to indicate the value of the first value The first information requires log ₂ (N+1/X) bits of signaling overhead. Wherein, log ₂ (N+1/X) represents the number of bits required for the range [0,N]. For example, when X=1 ms, the signaling overhead required to indicate the first value is log ₂ (N+1/1) bits. Compared with directly updating the dedicated timing offset value, the method provided in this application can replace the bits occupied by the dedicated timing offset value with the bits occupied by the first value, because the value range of the first value is relatively The value range of the dedicated timing offset value is small, therefore, the method provided by the present application can reduce the signaling overhead caused when the network device indicates the dedicated timing offset value to the terminal device, and further, can enhance scheduling flexibility to improve system performance.

In addition, due to the continuous movement of the satellite relative to the earth, the distance between the satellite and the terminal device is constantly decreasing, which may even cause the dedicated timing offset value to be smaller than the cell-level timing offset value and the first difference In this application, the value range of the first value is [0, N], and N is designed to be greater than or equal to 2 times the value of the first difference, which can ensure the final dedicated timing of the terminal device The offset value may be smaller than the difference between the cell-level timing offset value and the first difference value, which improves the accuracy of the dedicated timing offset value.

As another example, the present application may design the value range of the first value as [-N, N], assuming that the unit of the first value is Xms (X≥1), it is used to indicate that the first The first information of the value requires 1+log ₂ (N+1/X) bits of signaling overhead. Among them, log ₂ (N+1/X) represents the number of bits required for the range [0,N], and an additional 1 bit is used to expand the value range to [-N,N]. For example, when X=1 ms, the signaling overhead required to indicate the first value is 1+log ₂ (N+1/1) bits. Compared with directly updating the dedicated timing offset value, the method provided in this application can replace the bits occupied by the dedicated timing offset value with the bits occupied by the first value, because the value range of the first value is relatively The value range of the dedicated timing offset value is small, therefore, the method provided by the present application can reduce the signaling overhead caused when the network device indicates the dedicated timing offset value to the terminal device, and further, can enhance scheduling flexibility to improve system performance.

In addition, due to the continuous movement of the satellite relative to the earth, the distance between the satellite and the terminal device is constantly increasing, which may even cause the dedicated timing offset value to be greater than the latest updated cell-level timing offset value. Setting the minimum value of the first value to -N, that is, setting the minimum value of the first value to a negative value, can ensure that the dedicated timing offset value finally obtained by the terminal device can be greater than the latest updated cell-level timing Offset, which improves the accuracy of the dedicated timing offset value.

In addition, due to the continuous movement of the satellite relative to the earth, the distance between the satellite and the terminal device is constantly decreasing, which may even cause the dedicated timing offset value to be smaller than the cell-level timing offset value and the first difference In this application, the value range of the first value is [-N, N], and N is designed to be greater than or equal to 2 times the value of the first difference, which can ensure that the terminal device finally obtains a dedicated The timing offset value may be smaller than the difference between the cell-level timing offset value and the first difference value, which improves the accuracy of the dedicated timing offset value.

In other words, based on the above analysis, in LEO and/or MEO scenarios, the continuous movement of satellites may lead to the following two situations:

Case 1:

The dedicated timing offset value is smaller than the difference between the cell-level timing offset value and the first difference value.

Case 2:

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

It should be noted that this application considers that the cell-level timing offset value broadcast by the base station is usually slightly larger than the RTT (ie, the maximum round-trip delay) from the reference point to the farthest position in the cell, that is, the base station has There is some extra space for the cell-level timing offset value, and the base station in the NTN system will periodically notify the cell-level timing offset value, that is, as the satellite moves, the cell-level timing offset value broadcast by the base station at different times is also constantly updated That is to say, the possibility of the occurrence of the above-mentioned situation 2 is relatively low. Therefore, when the application designs the value range of the first value, the above-mentioned situation 2 can be considered, or the above-mentioned situation 2 can not be considered. And then specifically limited.

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

For another example, the present application may not consider the above case 2, that is, the value range of the first numerical value is set to [0, N]. In other words, the value range of the first value of the LEO and/or MEO scene can be narrowed to [0, N], compared with designing the value range of the first value to [-N, N], the The value range of the first value is designed to be [0, N], which not only ensures the robustness of indicating the dedicated timing offset value by means of the first value, but also saves 1 bit used to indicate the sign of the first value overhead, and further, signaling overhead can be further reduced.

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.

Exemplarily, the information used to indicate the sign of the first value is the highest bit or the lowest bit of the first information, and one of the bits used to indicate the sign of the first value in the first information is The outer bits are used to indicate the absolute value of the first value. For example, taking the sign of the first information indicated by the highest bit of the first information as an example, if the highest bit is 1, it means that the first value is a negative value; if the highest bit is 0, it means The first numerical value is a positive value; or, if the highest bit is 1, it means that the first numerical value is a positive value, and if the highest bit is 0, it means that the first numerical value is a negative value.

Optionally, N= ²ⁿ -1; wherein, n is the smallest integer such that N≥2K.

In this embodiment, N is designed to be equal to 2 ⁿ -1, and n is designed to be the smallest integer used to ensure that N≥2K, which not only enables the value range of the first value to cover -2K to Any value in 2K (that is, the value range of the first value is [-N, N]) or any value in 0 to 2K (that is, the value range of the first value is [0, N] ]), can also reserve a certain amount of extra space, which improves the robustness of the NTN system.

Of course, in other alternative embodiments, N may also be determined in other ways, which is not specifically limited in the present application. For example, N is the value after K is rounded up.

It should be noted that n being the smallest integer such that N≧2K is only an example of the present application and should not be construed as a limitation of the present application.

For example, in other alternative embodiments, n is the smallest integer such that N≧a×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 scenarios and/or LEO scenarios.

From Table 1 above, it can be seen that the maximum size of the cell coverage in the MEO scenario and the LEO scenario is the same, that is, both are 1000km, resulting in the difference between the maximum delay and the minimum delay in the cell coverage in the MEO scenario, which is different from that of the LEO scenario. The difference between the maximum delay and the minimum delay within the coverage of the cell in the scenario is also less than 3.5ms. Therefore, for the MEO scenario and the LEO scenario, the first value may correspond to the same value range.

The solution provided by the present application will be illustrated below in conjunction 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, the terminal device receives After receiving the first information, the dedicated timing offset value may be determined based on a first value indicated by the first information. For example, the difference between the cell-level timing offset value and the first value may be determined as the dedicated timing offset value.

As shown in Figure 9, taking the reference point on the satellite side as an example, the maximum round-trip delay includes the RTT between the reference point and the location within the cell coverage and the farthest distance from the reference point, and the minimum round-trip time The extension includes the RTT between the reference point and a location within the coverage of the cell 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 from the reference point to all UEs in the cell, the cell-level timing offset value can be calculated based on the RTT from the reference point to the farthest UE in the cell. Considering that configuring the cell-level timing offset value has low requirements for scheduling flexibility, a quantization granularity greater than or equal to 1 ms can be configured, thereby reducing signaling overhead. Take a value range covering all scenarios as an example, that is, [0]–[542]ms corresponds to or supports all scenarios, and if a quantization granularity of 1ms is used, 10-bit signaling overhead is required. If the quantization granularity of 4ms is adopted, only 8 bits are needed, which can save 2 bits of signaling overhead.

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 can indicate the difference between the cell-level timing offset value and the dedicated timing offset value based on the cell-level timing offset value. The method of configuring the dedicated timing offset value for the terminal device in a way of the difference value, thereby saving signaling overhead.

For example, it can be seen from Table 2 above that for the GEO scenario, since the difference between the maximum delay and the minimum delay within the coverage of the cell is 10.3ms, within the coverage of the cell, the maximum round-trip delay and the minimum round-trip time The first difference between delays is 20.6 ms. Since the dedicated timing offset value of any terminal equipment usually matches the RTT from the reference point to said any terminal equipment, within the coverage of the cell, the cell-level timing offset value is consistent with the dedicated timing of any terminal equipment. The difference of the offset value will not exceed the first difference within the coverage of the cell, that is, the difference between the cell-level timing offset value and the dedicated timing offset value of any terminal device will not exceed 20.6ms.

Assuming that in a GEO cell, the RTT from the reference point to the farthest UE within the coverage of the cell is 540.6ms, then the RTT from the reference point to the nearest UE within the coverage of the cell will not be less than 540.6-20.6=520ms. If the specific timing offset value is directly notified each time the dedicated timing offset value is updated, 10-bit signaling overhead is required when the quantization granularity of 1 ms is adopted. If the dedicated timing offset value is updated by indicating the difference based on the cell-level timing offset value, the quantization of the 20.6 ms difference requires at most 5 bits of signaling overhead, which can effectively save signaling overhead.

Example 2:

In the embodiment, in the GEO scenario, 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.

From Table 2 above, it can be seen that for the GEO scenario, the difference between the maximum delay and the minimum delay within the coverage of the cell is 10.3ms. Therefore, within the coverage of the cell, the difference between the maximum round-trip delay and the minimum round-trip delay The first difference between is 20.6ms. Since the dedicated timing offset value of any terminal equipment usually matches the RTT from the reference point to said any terminal equipment, within the coverage of the cell, the cell-level timing offset value is consistent with the dedicated timing of any terminal equipment. The difference of the offset value will not exceed the first difference within the coverage of the cell, that is, the difference between the cell-level timing offset value and the dedicated timing offset value of any terminal device will not exceed 20.6ms.

Exemplarily, in this embodiment, the first difference is rounded up to ²ⁿ -1=31ms to obtain the maximum value of the first value in the GEO scene, that is, the value range of the first value in the GEO scene is [0 ,31] ms. In this embodiment, the value range of the first value is designed as [0,31] ms, which not only enables the value range of the first value to cover any value from 0 to 20.6 within the coverage of the cell, but also enables A certain amount of extra space is reserved to improve the robustness of the NTN system.

Exemplarily, if the base station configures a cell-level timing offset value of Oms, and configures the terminal device with a first value of Yms after the initial access is completed, the terminal device may determine that the dedicated timing offset value at this time is O- Yms. For example, if the cell-level timing offset value is O=540ms and the first value is Y=20ms, it may be determined that the dedicated timing offset value is 540−20=520ms.

In this embodiment, the value range of the first value is designed as [0, 31], assuming that the unit of the first value is Xms (X≥1), the first value used to indicate the first value The information requires log ₂ (32/X) bits of signaling overhead. For example, when X=1 ms, the signaling overhead required to indicate the first value is log ₂ (32/1) bits. Compared with directly updating the dedicated timing offset value, for example, using a value range to cover all scenarios, that is, [0]–[542]ms corresponds to or supports all scenarios, and if 1ms quantization granularity is used, 10 bit signaling overhead. The method provided by this application can replace the bits occupied by the dedicated timing offset value with the bits occupied by the first value. For example, when X=1 ms, the GEO scenario indicates that the signaling overhead required for the first value is log ₂ (32/1 )=5 bits. That is to say, since the value range of the first value is smaller than the value range of the dedicated timing offset value, the method provided in this application can reduce the time required for the network device to indicate the dedicated timing offset value to the terminal device. The resulting signaling overhead can further improve system performance on the basis of enhanced scheduling flexibility.

Example 3:

In the embodiment, in the HAPS scenario, 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.

From Table 2 above, it can be seen that for the HAPS scenario, the maximum size of the cell coverage is 200km, and the maximum size of the cell coverage in the reference GEO scenario is 3500km, and the difference between the maximum delay and the minimum delay in the cell coverage is The value is 10.3ms. Therefore, the difference between the maximum delay and the minimum delay in the coverage area of the cell is about 10.3/(3500/200)=0.6ms, that is, the first round-trip delay between the maximum round-trip delay and the minimum round-trip delay. A difference is 1.2ms. Since the dedicated timing offset value usually matches the RTT from the reference point to the terminal equipment, the difference between the cell-level timing offset value and the dedicated timing offset value of any terminal equipment within the coverage area of the cell will not exceed The first difference within the coverage of the cell, that is, the difference between the cell-level timing offset value and the dedicated timing offset value of any terminal device will not exceed 1.2 ms.

Exemplarily, in this embodiment, the first difference is rounded up to ²ⁿ -1=3ms to obtain the maximum value of the first value in the HAPS scenario, that is, the value range of the first value in the HAPS scenario is [0 ,3] ms. In this embodiment, the value range of the first value is designed to be [0,3] ms, which not only enables the value range of the first value to cover any value from 0 to 1.2 within the coverage of the cell, but also enables A certain amount of extra space is reserved to improve the robustness of the NTN system.

Exemplarily, if the base station configures a cell-level timing offset value of Oms, and configures the terminal device with a first value of Yms after the initial access is completed, the terminal device may determine that the dedicated timing offset value at this time is O- Yms. For example, if the cell-level timing offset value is 0=3ms and the first value is Y=1ms, it may be determined that the dedicated timing offset value is 3−1=2ms.

In this embodiment, the value range of the first value is designed as [0, 3], and assuming that the unit of the first value is Xms (X≥1), the first value used to indicate the first value is The information requires log ₂ (4/X) bits of signaling overhead. For example, when X=1 ms, the signaling overhead required to indicate the first value is log ₂ (4/1) bits. Compared with directly updating the dedicated timing offset value, for example, using a value range to cover all scenarios, that is, [0]–[542]ms corresponds to or supports all scenarios, and if 1ms quantization granularity is used, 10 bit signaling overhead. The method provided by this application can replace the bits occupied by the dedicated timing offset value with the bits occupied by the first value. For example, when X=1 ms, the HAPS scenario indicates that the signaling overhead required by the first value is log ₂ (4/1 ) = 2 bits. That is to say, since the value range of the first value is smaller than the value range of the dedicated timing offset value, the method provided in this application can reduce the time required for the network device to indicate the dedicated timing offset value to the terminal device. The resulting signaling overhead can further improve system performance on the basis of enhanced scheduling flexibility.

Example 4:

In the embodiment, in the LEO and/or MEO scenario, the network device indicates the difference between the cell-level timing offset value and the dedicated timing offset value, and configures a dedicated timing offset value for the terminal device. explained.

From Table 2 above, it can be seen that for LEO and/or MEO scenarios, the difference between the maximum delay and the minimum delay within the coverage of the cell is less than 3.5ms. Therefore, within the coverage of the cell, the maximum round-trip delay and the minimum The first difference between the round-trip delays is less than 7ms. Since the dedicated timing offset value of any terminal equipment usually matches the RTT from the reference point to said any terminal equipment, within the coverage of the cell, the cell-level timing offset value is consistent with the dedicated timing of any terminal equipment. The difference of the offset value will not exceed the first difference within the coverage of the cell, that is, the difference between the cell-level timing offset value and the dedicated timing offset value of any terminal device will not exceed 7ms.

Exemplarily, in this embodiment, the first difference is rounded up to ²ⁿ -1=7ms to obtain the maximum value of the first value in the LEO and/or MEO scene, that is, the first value in the LEO and/or MEO scene The value range is [0,7]ms. In this embodiment, the value range of the first value is designed as [0, 7] ms, so that the value range of the first value can cover any value from 0 to 7 within the coverage of the cell.

Exemplarily, if the base station configures a cell-level timing offset value of Oms, and configures the terminal device with a first value of Yms after the initial access is completed, the terminal device may determine that the dedicated timing offset value at this time is O- Yms. For example, if the cell-level timing offset value is 0=30ms and the first value is Y=6ms, it may be determined that the dedicated timing offset value is 30−6=24ms.

In this embodiment, the value range of the first value is designed to be [0, 7]. Assuming that the unit of the first value is Xms (X≥1), the first value used to indicate the first value is The information requires log ₂ (8/X) bits of signaling overhead. For example, when X=1 ms, the signaling overhead required to indicate the first value is log ₂ (8/1) bits. Compared with directly updating the dedicated timing offset value, for example, using a value range to cover all scenarios, that is, [0]–[542]ms corresponds to or supports all scenarios, and if 1ms quantization granularity is used, 10 bit signaling overhead. The method provided in this application can replace the bits occupied by the dedicated timing offset value with the bits occupied by the first value. For example, when X=1 ms, the LEO and/or MEO scenarios indicate that the signaling overhead required by the first value is log ₂ (8/1) = 3 bits. That is to say, since the value range of the first value is smaller than the value range of the dedicated timing offset value, the method provided in this application can reduce the time required for the network device to indicate the dedicated timing offset value to the terminal device. The resulting signaling overhead can further improve system performance on the basis of enhanced scheduling flexibility.

It should be noted that due to the constant movement of the satellite relative to the earth, the distance between the satellite and the terminal device is constantly increasing, which may even cause the dedicated timing offset value to be greater than the latest updated cell-level timing offset value. Similarly, due to the continuous movement of the satellite relative to the earth, the distance between the satellite and the terminal device is continuously reduced, which may even cause the dedicated timing offset value to be smaller than the cell-level timing offset value and the first The difference of a difference.

As shown in Figure 10, taking the reference point on the satellite side as an example, the maximum round-trip delay at position _T1 is maximum _RTT1 , and the minimum round-trip delay is minimum _RTT1 ; the maximum round-trip delay at position _T0 is maximum RTT ₀ , the minimum round-trip delay is the minimum RTT ₀ .

Assuming that the satellite moves from right to left, the cell-level timing offset value broadcast by the satellite at T ₁ position is 37ms; in addition, the difference between the maximum RTT ₁ and the minimum RTT ₁ is rounded up to 2 ⁿ -1 = 7ms; That is, the first value range is still [0,7]ms. When the satellite moves to the T ₀ position, as the distance from the satellite to the UE becomes larger, the dedicated timing offset value is 39ms, that is, the dedicated timing offset value at the T ₀ position may be larger than the broadcast cell at the T ₁ position level timing offset value. In other words, if the first value range is still [0,7] ms, then the range of the dedicated timing offset value determined by the first value is [30,37] ms, that is, the network device cannot pass the first value Configure a dedicated timing offset value greater than 37 to the end device.

Assuming that the satellite moves from left to right, the cell-level timing offset value broadcast by the satellite at T ₀ is 39ms; in addition, the difference between the maximum RTT ₀ and the minimum RTT ₀ is rounded up to 2 ⁿ -1 = 7ms; that is The first value range is still [0,7]ms. When the satellite moves to the _T1 position, as the distance from the satellite to the UE becomes smaller, the dedicated timing offset value is reduced to 30 ms. That is, the dedicated timing offset value at the T ₁ position may be smaller than the cell-level timing offset value broadcast at the T ₀ position. In other words, if the range of the first value is still [0,7]ms, then the range of the dedicated timing offset determined by the first value is [32,39]ms, that is, the network device cannot pass the first value Configure a dedicated timing offset value less than 32 to the end device.

Based on this, the present application can expand the value range of the first value, so that the base station can configure a larger range of the dedicated timing offset value for the terminal device.

Exemplarily, in this embodiment, the first difference is rounded up to ²ⁿ -1=7ms to obtain the maximum value of the first value in the LEO and/or MEO scene, that is, the first value in the LEO and/or MEO scene The value range is [-7,7]ms. In this application, by setting the minimum value of the first value to -7, it can ensure that the final dedicated timing offset value obtained by the terminal device can be greater than the latest updated cell-level timing offset, which improves the dedicated timing offset value accuracy.

Exemplarily, in this embodiment, the first difference is rounded up to ²ⁿ -1=7ms to obtain the maximum value of the first value in the LEO and/or MEO scene, that is, the first value in the LEO and/or MEO scene The value range is [-15,15]ms. In this application, by setting the minimum value of the first value to -15, it can be ensured that the final dedicated timing offset value obtained by the terminal device is greater than the latest updated cell-level timing offset, which improves the specific timing offset value. accuracy. In addition, the present application designs the absolute value of the maximum value and the absolute value of the minimum value of the first numerical value to be greater than 14, that is, the absolute value of the maximum value and the absolute value of the minimum value of the first numerical value are both designed to be greater than 2 times The numerical value of the first difference value can ensure that the dedicated timing offset value finally obtained by the terminal equipment can be smaller than the difference between the cell-level timing offset value and the first difference value, and the dedicated timing offset value is improved. accuracy.

Exemplarily, if the base station configures a cell-level timing offset value of Oms, and configures the terminal device with a first value of Yms after the initial access is completed, the terminal device may determine that the dedicated timing offset value at this time is O- Yms. For example, if the cell-level timing offset value is 0=39ms and the first value is Y=-10ms, it can be determined that the dedicated timing offset value is 39-(-10)=49ms.

In this embodiment, in this embodiment, if the value range of the first value is designed as [-15,15], assuming that the unit of the first value is Xms (X≥1), it is used to indicate the The first information of the first value requires 1+log ₂ (16/X) bits of signaling overhead. Among them, log ₂ (16/X) represents the number of bits required for the range [0,15], and an extra bit is used to expand the value range to [-15,15]. For example, when X=1 ms, the signaling overhead required to indicate the first value is 1+log ₂ (16/1) bits. Compared with directly updating the dedicated timing offset value, for example, using a value range to cover all scenarios, that is, [0]–[542]ms corresponds to or supports all scenarios, and if 1ms quantization granularity is used, 10 bit signaling overhead. The method provided in this application can replace the bits occupied by the dedicated timing offset value with the bits occupied by the first value. For example, when X=1ms, the LEO and/or MEO scenarios indicate that the signaling overhead required for the first value is 1+ log ₂ (16/1) = 5 bits. The highest bit among the 5 bits is used to indicate the sign of the first value. That is to say, since the value range of the first value is smaller than the value range of the dedicated timing offset value, the method provided by the present application can reduce the time required for the network device to indicate the dedicated timing offset value to the terminal device. The resulting signaling overhead can further improve system performance on the basis of enhanced scheduling flexibility.

Exemplarily, in this embodiment, the first difference is rounded up to ²ⁿ -1=7ms to obtain the maximum value of the first value in the LEO and/or MEO scene, that is, the first value in the LEO and/or MEO scene The value range is [0,15]ms. In this application, the maximum value of the first value is designed to be greater than 14, that is, the maximum value of the first value is designed to be greater than 2 times the value of the first difference, which can ensure that the final dedicated timing offset value obtained by the terminal device can be less than The difference between the cell-level timing offset value and the first difference improves the accuracy of the dedicated timing offset value.

Exemplarily, if the base station configures a cell-level timing offset value of Oms, and configures the terminal device with a first value of Yms after the initial access is completed, the terminal device may determine that the dedicated timing offset value at this time is O- Yms. For example, if the cell-level timing offset value is 0=39ms and the first value is Y=10ms, it can be determined that the dedicated timing offset value is 39−10=29ms.

In this embodiment, if the value range of the first value is designed as [0,15], assuming that the unit of the first value is Xms (X≥1), then the first value used to indicate the first value One message requires log ₂ (16/X) bits of signaling overhead. Among them, log ₂ (16/X) represents the number of bits required for the range [0,15]. For example, when X=1 ms, the signaling overhead required to indicate the first value is log ₂ (16/1) bits. Compared with directly updating the dedicated timing offset value, for example, using a value range to cover all scenarios, that is, [0]–[542]ms corresponds to or supports all scenarios, and if 1ms quantization granularity is used, 10 bit signaling overhead. The method provided in this application can replace the bits occupied by the dedicated timing offset value with the bits occupied by the first value. For example, when X=1 ms, the LEO and/or MEO scenarios indicate that the signaling overhead required by the first value is log ₂ (16/1) = 4 bits. That is to say, since the value range of the first value is smaller than the value range of the dedicated timing offset value, the method provided by the present application can reduce the time required for the network device to indicate the dedicated timing offset value to the terminal device. The resulting signaling overhead can further improve system performance on the basis of enhanced scheduling flexibility. In addition, compared with designing the value range of the first value as [-15, 15], designing the value range of the first value as [0, 15] not only ensures that the The method indicates the robustness of the dedicated timing offset value, and can also save 1-bit overhead for the symbol indicating the first value, and further, can further reduce the signaling overhead.

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 specified timing offset value based on the cell-level timing offset value. Dedicated timing offset value. However, in the NTN system, due to the continuous movement of the satellite, the maximum RTT from the reference point to the UE within the coverage of the cell may change constantly, so the cell-level timing offset values broadcast by the base station at different times may also be different. In this application, the cell-level timing offset value used to calculate the dedicated timing offset value is designed as the last cell-level timing offset value received by the terminal device before receiving the first value, which can improve the Accuracy of dedicated timing offset values.

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

As shown in Figure 11, the base station broadcasts cell-level timing offset value 1, cell-level timing offset value 2, and cell-level timing offset value 3 at time t ₀ , t ₁ and t ₃ respectively, and due to satellite movement, the base station broadcasts The cell-level timing offset value 1, the cell-level timing offset value 2, and the cell-level timing offset value 3 may be different. In addition, at time _t2 , the base station configures the first value for the UE through MAC CE signaling, and Δt represents the time delay from the base station to the UE. After the UE receives the first information indicating the first value at time t ₂ +Δt, it needs to calculate the dedicated timing offset value based on the cell-level timing offset value 1 received at time t ₁ +Δt. That is to say, even if the UE receives the updated cell-level timing offset value 3 at time t ₃ +Δt, it does not need to update the previously calculated dedicated timing offset value.

The preferred embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application. These simple modifications all belong to the protection scope of the present application. For example, the various specific technical features described in the above specific implementation manners can be combined in any suitable manner if there is no contradiction. Separately. As another example, any combination of various implementations of the present application can also be made, as long as they do not violate the idea of the present application, they should also be regarded as the content disclosed in the present application.

It should also be understood that in the various method embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the order of execution of the processes should be determined by their functions and internal logic, and should not be used in this application. The implementation of the examples constitutes no limitation. In addition, in this embodiment of the application, the terms "downlink" and "uplink" are used to indicate the transmission direction of signals or data, wherein "downlink" is used to indicate that the transmission direction of signals or data is from the station to the user equipment in the cell For the first direction, "uplink" is used to indicate that the signal or data transmission direction is the second direction from the user equipment in the cell to the station, for example, "downlink signal" indicates that the signal transmission direction is the first direction. In addition, in the embodiment of the present application, the term "and/or" is only an association relationship describing associated objects, indicating that there may be three relationships. Specifically, A and/or B may mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

The method embodiment of the present application is described in detail above with reference to FIG. 1 to FIG. 11 , and the device embodiment of the present application is described in detail below in conjunction with FIG. 12 to FIG. 15 .

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

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

The receiving unit 310 is configured to receive first information; the first information is used to indicate a first value, the value range of the first value is determined according to the maximum round-trip delay and the minimum round-trip delay, and the maximum round-trip delay Including the round-trip time delay RTT between the reference point and the location within the cell coverage and the farthest distance from the reference point, the minimum round-trip time delay includes the reference point and the location within the cell coverage and the distance from the reference point RTT between the closest positions of 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 also used for:

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

In some embodiments, M=2 ^m −1; wherein m is the smallest integer such that M≧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= ²ⁿ -1; wherein, n is the smallest integer such that N≥2K.

In some embodiments, the method is applicable to Medium Earth Orbit MEO scenarios and/or Low Earth Orbit LEO scenarios.

It should be understood that the device embodiment and the method embodiment may correspond to each other, and similar descriptions may refer to the method embodiment. Specifically, the terminal device 300 shown in FIG. 12 may correspond to the corresponding subject in the method 200 of the embodiment of the present application, and the foregoing and other operations and/or functions of each unit in the terminal device 300 are for realizing the For the sake of brevity, the corresponding processes in each method are not repeated here.

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

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

A sending unit 410, configured to send first information; the first information is used to indicate a first value, the value range of the first value is determined according to the maximum round-trip delay and the minimum round-trip delay, and the maximum round-trip delay Including the round-trip time delay RTT between the reference point and the location within the cell coverage and the farthest distance from the reference point, the minimum round-trip time delay includes the reference point and the location within the cell coverage and the distance from the reference point The RTT between the closest positions of the reference points, the first value is used to determine the dedicated timing offset value of the terminal device.

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:

Sending second information, where the second information is used to indicate the cell-level timing offset value.

In some embodiments, the cell-level timing offset value is a latest updated timing offset value before the network device sends the first information.

It should be understood that the device embodiment and the method embodiment may correspond to each other, and similar descriptions may refer to the method embodiment. Specifically, the network device 400 shown in FIG. 13 may correspond to the corresponding subject in the method 200 of the embodiment of the present application, and the aforementioned and other operations and/or functions of each unit in the network device 400 are respectively in order to realize the For the sake of brevity, the corresponding processes in each method are not repeated here.

The above describes the communication device in the embodiment of the present application from the perspective of functional modules with reference to the accompanying drawings. It should be understood that the functional modules may be implemented in the form of hardware, may also be implemented by instructions in the form of software, and may also be implemented by a combination of hardware and software modules. Specifically, each step of the method embodiment in the embodiment of the present application can be completed by an integrated logic circuit of the hardware in the processor and/or instructions in the form of software, and the steps of the method disclosed in the embodiment of the present application can be directly embodied as hardware The decoding processor is executed, or the combination of hardware and software modules in the decoding processor is used to complete the execution. Optionally, the software module may be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, and registers. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps in the above method embodiments in combination with its hardware.

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

FIG. 14 is a schematic structural diagram of a communication device 500 according to 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 invoke and run a computer program from the memory, so as to implement the method in the embodiment of the present application.

As shown in FIG. 14 , the communication device 500 may further include a memory 520 .

Wherein, the memory 520 may be used to store indication information, and may also be used to store codes, instructions, etc. executed by the processor 510 . Wherein, the processor 510 can invoke and run a computer program from the memory 520, so as to implement the method in the embodiment of the present application. The memory 520 may be an independent device independent of the processor 510 , or may be integrated in the processor 510 .

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

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

It should be understood that various components in the communication device 500 are connected through a bus system, wherein the bus system includes not only a data bus, but also a power bus, a control bus, and a status signal bus.

It should also be understood that the communication device 500 may be the terminal device in the embodiment of the present application, and the communication device 500 may implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application, that is, the The communication device 500 may correspond to the terminal device 300 in the embodiment of the present application, and may correspond to a corresponding subject in performing the method 200 according to the embodiment of the present application. For the sake of brevity, details are not repeated here. Similarly, the communication device 500 may be the network device of the embodiment of the present application, and the communication device 500 may implement the corresponding processes implemented by the network device in the various methods of the embodiment of the present application. That is to say, the communication device 500 in the embodiment of the present application may correspond to the network device 400 in the embodiment of the present application, and may correspond to the corresponding subject in performing the method 200 according to the embodiment of the present application. For the sake of brevity, no further repeat.

In addition, a chip is also provided in the embodiment of the present application.

For example, the chip may be an integrated circuit chip, which has signal processing capabilities, and can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. The chip can also be called system-on-chip, system-on-chip, system-on-chip or system-on-chip, etc. Optionally, the chip can be applied to various communication devices, so that the communication device installed with the chip can execute the methods, steps and logic block diagrams 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 invoke and run a computer program from the memory, so as to implement the method in the embodiment of the present application.

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

Wherein, the processor 610 can invoke and run a computer program from the memory 620, so as to implement the method in the embodiment of the present application. The memory 620 may be used to store indication information, and may also be used to store codes, instructions, etc. executed by the processor 610 . The memory 620 may be an independent device independent of the processor 610 , or may be integrated in the processor 610 .

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

Wherein, the processor 610 can control the input interface 630 to communicate with other devices or chips, specifically, can obtain information or data sent by other devices or chips.

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

Wherein, the processor 610 can control the output interface 640 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.

It should be understood that the chip 600 can be applied to the network device in the embodiment of the present application, and the chip can realize the corresponding process implemented by the network device in the various methods of the embodiment of the present application, and can also realize the various methods of the embodiment of the present application For the sake of brevity, the corresponding process implemented by the terminal device in , will not be repeated here.

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

Processors mentioned above may include, but are not limited to:

General-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates Or transistor logic devices, discrete hardware components, and so on.

The processor may be used to implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or erasable programmable memory, register. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

The storage mentioned above includes but is not limited to:

volatile memory and/or non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash. The volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (Static RAM, SRAM), Dynamic Random Access Memory (Dynamic RAM, DRAM), Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synch link DRAM, SLDRAM) and Direct Memory Bus Random Access Memory (Direct Rambus RAM, DR RAM).

It should be noted that the memories described herein are intended to include these and any other suitable types of memories.

Embodiments of the present application also provide a computer-readable storage medium for storing computer programs. The computer-readable storage medium stores one or more programs, and the one or more programs include instructions. When the instructions are executed by a portable electronic device including a plurality of application programs, the portable electronic device can perform the wireless communication provided by the application. communication method. Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the methods of the embodiments of the present application. For brevity, here No longer. Optionally, the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiments of the present application , for the sake of brevity, it is not repeated here.

The embodiment of the present application also provides a computer program product, including a computer program. Optionally, the computer program product can be applied to the network device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, the repeat. Optionally, the computer program product can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the methods of the embodiments of the present application, for It is concise and will not be repeated here.

The embodiment of the present application also provides a computer program. When the computer program is executed by the computer, the computer can execute the wireless communication method provided in this application. Optionally, the computer program can be applied to the network device in the embodiment of the present application. When the computer program is run on the computer, the computer executes the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity , which will not be repeated here. Optionally, the computer program can be applied to the mobile terminal/terminal device in the embodiment of the present application. When the computer program is run on the computer, the computer executes each method in the embodiment of the present application to be implemented by the mobile terminal/terminal device For the sake of brevity, the corresponding process will not be repeated here.

An embodiment of the present application also provides a communication system, which may include the above-mentioned terminal device and network device to form a communication system 100 as shown in FIG. 1 , which is not repeated here for brevity. It should be noted that the terms "system" and the like in this document may also be referred to as "network management architecture" or "network system".

It should also be understood that the terms used in the embodiments of the present application and the appended claims are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. For example, the singular forms "a", "said", "above" and "the" used in the embodiments of this application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. meaning.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the embodiments of the present application. If implemented in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in the embodiment of the present application. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk.

Those skilled in the art can also realize that for the convenience and brevity of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, and details are not repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the division of units or modules or components in the above-described device embodiments is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or modules or components can be combined or integrated to another system, or some units or modules or components may be ignored, or not implemented. For another example, the units/modules/components described above as separate/display components may or may not be physically separated, that is, they may be located in one place, or may also be distributed to multiple network units. Part or all of the units/modules/components can be selected according to actual needs to achieve the purpose of the embodiments of the present application. Finally, it should be noted that the mutual coupling or direct coupling or communication connection shown or discussed above may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms .

The above content is only the specific implementation of the embodiment of the application, but the scope of protection of the embodiment of the application is not limited thereto. Anyone familiar with the technical field can easily think of Any changes or substitutions shall fall within the scope of protection of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application should be determined by the protection scope of the claims.

Claims

A wireless communication method, characterized in that the method is applicable to a terminal device, and the method includes:

receiving first information; the first information is used to indicate a first value, and the value range of the first value is determined according to the maximum round-trip delay and the minimum round-trip delay, and the maximum round-trip delay is a reference point and a cell coverage The round-trip time delay RTT between the position within the range and the farthest from the reference point, and the minimum round-trip time delay is between the reference point and the position within the coverage of the cell and the position closest to the reference point RTT between;

Determining a dedicated timing offset value of the terminal device based on the first value.
The method according to claim 1, wherein the value range of the first value is determined according to a first difference between the maximum round-trip delay and the minimum round-trip delay.
The method according to claim 2, wherein the determining the dedicated timing offset value of the terminal device based on the first value comprises:

The difference between the cell-level timing offset value and the first value is determined as the dedicated timing offset value; the cell-level timing offset value is greater than or equal to the maximum round-trip delay.
The method according to claim 3, further comprising:

Receive second information, where the second information is used to indicate the cell-level timing offset value.
The method according to claim 3, wherein the cell-level timing offset value is a last updated cell-level timing offset value before the terminal device receives the first information.
The method according to any one of claims 2 to 5, wherein the value range of the first value is [0, M]; wherein, M≥K, K represents the first difference.
The method according to claim 6, characterized in that M=2 m −1; wherein m is the smallest integer such that M≧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 value range of the first value is [-N, N] or [0, N]; wherein, N≥2K, K means the first difference.
The method according to claim 9, characterized in that, N= 2n -1; wherein, n is the smallest integer such that N≥2K.
The method according to claim 9, characterized in that the method is applicable to medium earth orbit MEO scenarios and/or low earth orbit LEO scenarios.
A wireless communication method, characterized in that the method is applicable to network equipment, and the method includes:

Sending first information; the first information is used to indicate a first value, the value range of the first value is determined according to the maximum round-trip delay and the minimum round-trip delay, and the maximum round-trip delay includes a reference point and a cell coverage The round-trip time delay RTT between the position within the range and the farthest from the reference point, the minimum round-trip time delay includes the distance between the reference point and the position within the coverage of the cell and the position closest to the reference point RTT between, the first value is used to determine the dedicated timing offset value of the terminal device.
The method according to claim 12, wherein the value range of the first value is determined according to a first difference between the maximum round-trip delay and the minimum round-trip delay.
The method according to claim 13, wherein the dedicated timing offset value is a difference between a cell-level timing offset value and the first value.
The method according to claim 14, characterized in that the method further comprises:

Sending second information, where the second information is used to indicate the cell-level timing offset value.
The method according to claim 14, characterized in that the cell-level timing offset value is a last updated cell-level timing offset value before the network device sends the first information.
The method according to any one of claims 13 to 16, wherein the value range of the first value is [0, M]; wherein, M≥K, K represents the first difference.
The method according to claim 17, characterized in that M=2 m −1; wherein m is the smallest integer such that M≧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 value range of the first value is [-N, N] or [0, N]; wherein, N≥2K, K means the first difference.
The method according to claim 20, characterized in that, N= 2n -1; wherein, n is the smallest integer such that N≥2K.
The method according to claim 20, characterized in that the method is applicable to medium earth orbit MEO scenarios and/or low earth orbit LEO scenarios.
A terminal device, characterized in that it includes:

A receiving unit, configured to receive first information; the first information is used to indicate a first value, and the value range of the first value is determined according to a maximum round-trip delay and a minimum round-trip delay, and the maximum round-trip delay includes The round-trip time delay RTT between the reference point and the location within the cell coverage and the farthest distance from the reference point, the minimum round-trip time delay includes the reference point and the location within the cell coverage and distance from the reference point RTT between points closest to location;

A determining unit, configured to determine a dedicated timing offset value of the terminal device based on the first value.
A network device, characterized in that it includes:

A sending unit, configured to send first information; the first information is used to indicate a first value, and the value range of the first value is determined according to a maximum round-trip delay and a minimum round-trip delay, and the maximum round-trip delay includes The round-trip time delay RTT between the reference point and the location within the cell coverage and the farthest distance from the reference point, the minimum round-trip time delay includes the reference point and the location within the cell coverage and distance from the reference point The RTT between the closest locations, the first value is used to determine the dedicated timing offset value of the terminal device.
A terminal device, characterized in that it includes:

A processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method according to any one of claims 1 to 11.
A network device, characterized in that it includes:

A processor and a memory, the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method according to any one of claims 12 to 22.
A chip, characterized in that it comprises:

The processor is used to call and run the computer program from the memory, so that the device installed with the chip executes the method as described in any one of claims 1 to 11 or as described in any one of claims 12 to 22 Methods.
A computer-readable storage medium, characterized in that it is used to store a computer program, the computer program causes the computer to execute the method according to any one of claims 1 to 11 or any one of claims 12 to 22 the method described.
A computer program product, characterized in that it includes computer program instructions, the computer program instructions cause a computer to perform the method according to any one of claims 1 to 11 or any one of claims 12 to 22 Methods.
A computer program, characterized in that the computer program causes a computer to execute the method according to any one of claims 1-11 or the method according to any one of claims 12-22.