CN120601938A

CN120601938A - Communication method and device

Info

Publication number: CN120601938A
Application number: CN202410258083.8A
Authority: CN
Inventors: 孔垂丽; 张希; 罗禾佳; 王俊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2024-03-04
Filing date: 2024-03-04
Publication date: 2025-09-05
Also published as: WO2025185491A8; WO2025185491A1

Abstract

The application provides a communication method and a device, in the method, a terminal selectively accesses more proper network equipment through at least one of the time of serving a cell by the network equipment, the position of the network equipment relative to the cell and the gesture of the terminal relative to the network equipment, thereby improving the utilization rate of network equipment resources, and the network equipment is selected in any combination form of the time, the position and the gesture, so that the switching caused by the movement of the network equipment and/or the terminal can be avoided when the terminal is accessed to the network equipment, the switching frequency of the network equipment is reduced, and the high-efficiency access is ensured.

Description

Communication method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communications method and apparatus.

Background

For Low Earth Orbit (LEO) satellites, there are mainly two major scenarios of gaze to ground (quad earth-fixed) and movement to ground (earth-moving).

In the ground gaze scenario, when a terminal device (UE) selects a cell, the cell is generally selected according to an S criterion, that is, the cell is selected according to signal quality, if the signal quality of a high-layer satellite is greater than that of a low-layer satellite, the UE always selects the high-layer satellite for access, and if the signal quality of the high-layer satellite is less than that of the low-layer satellite, the UE always selects the low-layer satellite for access, so that the utilization rate of satellite resources is reduced, and the UE always selects a satellite with higher access signal quality, resulting in an increase in the frequency of satellite handover.

Disclosure of Invention

The embodiment of the application provides a communication method and a communication device, which reduce the frequency of satellite switching, enable a terminal to select a more proper satellite and ensure high-efficiency access.

In a first aspect, a communication method is provided, which may be performed by a terminal, or a chip or logic module within a terminal. The method includes receiving first information from a network device, the network device being a non-terrestrial network device, the first information including a time at which the network device serves a cell and/or a location of the network device relative to the cell. Whether to access the network device is determined based on at least one of a time the network device serves the cell, a location of the network device relative to the cell, or a pose of the terminal relative to the network device.

Based on the method of the first aspect, the terminal can selectively access the more suitable network device by at least one of the time of serving the cell by the network device, the position of the network device relative to the cell and the gesture of the terminal relative to the network device, thereby improving the utilization rate of the network device resources, and the network device is selected by any combination of the time, the position and the gesture, so that the switching caused by the movement of the network device and/or the terminal can be avoided when the terminal is just accessed to the network device, the switching frequency of the network device is reduced, and the high-efficiency access is ensured.

In one possible implementation, determining whether to access the network device may include accessing the network device if a time the network device serves the cell is greater than or equal to a preset time threshold. It may be understood that the time for the network device to serve the cell may be a remaining time for the network device to serve the cell, and the preset time threshold may represent a minimum required service time, and if the remaining time for the network device to serve the cell is greater than or equal to the minimum required service time, the network device accords with a selection criterion of the terminal, and the terminal accesses the network device. Therefore, the switching frequency caused by the movement of the network equipment can be reduced, so that the terminal can select more suitable satellites, and high-efficiency access is ensured.

Optionally, the communication method may further comprise receiving a preset time threshold value from the network device before accessing the network device in case the time the network device serves the cell is greater than or equal to the preset time threshold value. It can be understood that the terminal can receive the preset time threshold value through the message broadcast by the network equipment, the terminal does not need to determine by itself, and the overhead of the terminal side is reduced.

In one possible implementation, determining whether to access the network device based on at least one of the items may include accessing the network device if a distance between a location of the terminal and a location of the network device relative to the cell is less than or equal to a preset distance threshold.

It can be understood that the position of the network device relative to the cell may be cell reference point information issued by the network device, the preset distance threshold may represent a maximum distance between the terminal and the cell reference point, and if the distance between the terminal and the cell reference point is less than or equal to the preset distance threshold, the network device accords with a selection criterion of the terminal, and the terminal accesses the network device. Therefore, when the distance between the terminal and the cell reference point is large, for example, when the terminal is at the edge of the cell covered by the satellite beam, namely, when the terminal is far away from the central point of the satellite beam coverage area, the terminal does not select the satellite to be accessed, so that the switching problem caused by the movement of the terminal can be avoided when the satellite is accessed.

Optionally, in the case that the distance between the location of the terminal and the location of the network device relative to the cell is less than or equal to a preset distance threshold value, the communication method may further comprise receiving the preset distance threshold value from the network device before accessing the network device. It can be understood that the terminal can receive the preset distance threshold value through the message broadcast by the network device, and the terminal does not need to determine by itself, so that the overhead of the terminal side is reduced.

In one possible implementation, the attitude of the terminal relative to the network device comprises a pitch angle between the terminal and the network device, and determining whether to access the network device according to at least one of the following can comprise accessing the network device if the pitch angle between the terminal and the network device is greater than or equal to a preset angle threshold value.

It will be appreciated that the preset angle threshold value may characterize the pitch angle information between the minimum required terminal and the network device. If the pitch angle between the terminal and the network equipment is larger than or equal to the preset angle threshold value, the network equipment accords with the selection standard of the terminal, and the terminal is accessed to the network equipment. Because the larger the pitch angle between the terminal and the network equipment is, the better the signal quality of the network equipment serving the terminal is, when the pitch angle between the terminal and the network equipment does not meet the minimum required pitch angle, the terminal does not select the network equipment to be accessed, and the switching problem caused by the movement of the terminal and/or the movement of a satellite can be avoided when the network equipment is accessed.

Optionally, the communication method may further include receiving a preset angle threshold value from the network device before accessing the network device in case that a pitch angle between the terminal and the network device is greater than or equal to the preset angle threshold value. It can be understood that the terminal can receive the preset angle threshold value through the message broadcast by the network equipment, the terminal does not need to determine by itself, and the overhead of the terminal side is reduced.

In one possible implementation, at least one of the following further comprises signal quality of the cell, and determining whether to access the network device according to at least one of the following comprises determining a first sum of a first weight value and a second weight value, wherein the first weight value is obtained by weighting the signal quality according to the first weight value, and the second weight value is obtained by weighting the time according to the second weight value. And accessing the network equipment under the condition that the first sum value is larger than or equal to a first preset value.

It may be appreciated that the first weight may include a weight obtained by weighting the received power in the cell search and a weight obtained by weighting the quality of the signal received in the cell search, and the first preset value may be a value arbitrarily selected according to the actual situation, for example, may be 0. The terminal selects whether to access the network equipment or not based on the signal quality and the time in a weighted mode, and can respectively select the weight values of the signal quality and the time according to the importance degree of the signal quality and the time, so that the flexibility of terminal star selection is improved.

Optionally, the communication method may further comprise receiving the first weight value and the second weight value from the network device before determining the first sum value of the first weight value and the second weight value. It can be understood that the terminal can obtain the weighting parameters by receiving the newly added signaling from the network device, thereby reducing the overhead of the terminal side.

In a possible implementation, the communication method may further include determining a difference between the first sum and a third weight, wherein the third weight is obtained by weighting a distance between a location of the terminal and a location of the network device relative to the cell according to the third weight. And accessing the network equipment under the condition that the difference value is greater than or equal to a second preset value.

It is understood that the second preset value may be a value arbitrarily selected according to the actual situation. The terminal selects whether to access the network equipment or not based on the signal quality, time and position in a weighted mode, and weight values corresponding to the signal quality, time and position can be selected according to the importance degree of the signal quality, time and position, so that the flexibility of terminal star selection is improved.

Optionally, the communication method may further comprise receiving a third weight value from the network device before determining the difference between the first sum value and the third weight value. It can be understood that the terminal can obtain the weighting parameters by receiving the newly added signaling from the network device, thereby reducing the overhead of the terminal side.

In one possible implementation, the attitude of the terminal relative to the network device comprises a pitch angle between the terminal and the network device, and the communication method further comprises the step of determining a second sum value of a first weighted value, a second weighted value and a fourth weighted value, wherein the fourth weighted value is obtained by weighting the pitch angle according to the fourth weighted value. And accessing the network equipment under the condition that the second sum value is larger than or equal to a third preset value. It is understood that the third preset value may be a value arbitrarily selected according to the actual situation. The terminal selects whether to access the network equipment or not based on the signal quality, time and angle in a weighted mode, and the weight values corresponding to the signal quality, time and angle can be selected according to the importance degree of the signal quality, time and angle, so that the flexibility of terminal star selection is improved.

Optionally, the communication method may further comprise receiving a fourth weight value from the network device before determining the second sum of the first weight value, the second weight value and the fourth weight value. It can be understood that the terminal can obtain the weighting parameters by receiving the newly added signaling from the network device, thereby reducing the overhead of the terminal side.

In a second aspect, a communication method is provided, which may be performed by a network device, or a chip or logic module within the network device. The method includes that network equipment obtains first information, wherein the network equipment is non-ground network equipment, and the first information comprises time for the network equipment to serve a cell and/or position of the network equipment relative to the cell. The network device sends first information to the terminal.

In a possible implementation, the communication method may further include sending second information to the terminal, where the second information includes at least one of a preset time threshold, a preset distance threshold, or a preset angle threshold.

In a possible implementation, the communication method may further include sending third information to the terminal, where the third information includes at least one of a first weight value, a second weight value, a third weight value, or a fourth weight value, where the first weight value is associated with a signal quality of the cell, the second weight value is associated with a time at which the network device serves the cell, the third weight value is associated with a distance between a location of the terminal and a location of the network device relative to the cell, and the fourth weight value is associated with a pose of the terminal relative to the network device.

Optionally, the attitude of the terminal with respect to the network device comprises a pitch angle between the terminal and the network device.

It will be appreciated that the relevant technical effects of the method of the second aspect may also refer to the relevant description of the first aspect, and will not be repeated here.

In a third aspect, a communication device is provided. The communication device comprises means, such as a transceiver module and a processing module, for performing the method according to any of the first to the second aspects. For example, a transceiver module for performing a transceiver function of the communication device, and a processing module for performing a function of the communication device other than the transceiver function.

Alternatively, the transceiver module may include a transmitting module and a receiving module. Wherein, the sending module is used for realizing the sending function of the communication device according to the third aspect, and the receiving module is used for realizing the receiving function of the communication device according to the third aspect.

Optionally, the communication device according to the third aspect may further include a storage module, where the storage module stores a program or instructions. The program or instructions, when executed by the processing module, enable the communications device to perform the method of any one of the first to second aspects.

It will be appreciated that the communication apparatus according to the third aspect may be a terminal or a network device, or may be a chip (system) or other component or assembly that may be provided in a terminal or a network device, or may be an apparatus including a terminal or a network device, or may be a component that performs part or all of the functions of a network device, which is not limited in this disclosure.

In addition, the technical effects of the communication device according to the third aspect may refer to the technical effects of the first aspect, which are not described herein.

In a fourth aspect, a communication device is provided. The communication device comprises a processor for performing the method of any of the first to second aspects.

In a possible implementation manner, the communication apparatus according to the fourth aspect may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for the communication device of the fourth aspect to communicate with other communication devices.

In a possible implementation manner, the communication apparatus according to the fourth aspect may further include a memory. The memory may be integral with the processor or may be separate. The memory may be used for storing computer programs and/or data related to the method according to any of the first to second aspects.

In an embodiment of the present application, the communication apparatus according to the fourth aspect may be the terminal or the network device according to any one of the first aspect to the second aspect, or a chip (system) or other component or assembly that may be disposed in the terminal or the network device, or an apparatus including the terminal or the network device, or may be a component that performs a function of part or all of the network device.

In addition, the technical effects of the communication device according to the fourth aspect may refer to the technical effects of the method according to any one of the first to second aspects, which are not described herein.

In a fifth aspect, a communication device is provided. The communications apparatus includes a processor coupled to a memory for executing a computer program or instructions stored in the memory to cause the communications apparatus to perform the method of any of the first to second aspects.

In one possible implementation, the communication device may further include a transceiver. The transceiver may be a transceiver circuit or an interface circuit. The transceiver may be used for communication of the communication device with other communication devices.

In a possible implementation, the communication device further comprises the memory for storing the above-mentioned computer program or instructions. In the alternative, the memory and processor are integrated.

In an embodiment of the present application, the communication apparatus according to the fifth aspect may be the terminal or the network device according to any one of the first to second aspects, or a chip (system) or other parts or components that may be disposed in the terminal or the network device, or an apparatus including the terminal or the network device.

Further, the technical effects of the communication device according to the fifth aspect may refer to the technical effects of the method according to any one of the first to second aspects, and are not described herein.

In a sixth aspect, a communication system is provided. The communication system comprises a terminal for performing the method according to the first aspect and a network device for performing the method according to the second aspect.

In a seventh aspect, there is provided a computer readable storage medium comprising a computer program or instructions which, when run on a computer, cause the method of any one of the first to second aspects described above to be implemented.

In an eighth aspect, there is provided a computer program product comprising a computer program or instructions which, when run on a computer, cause the method of any one of the first to second aspects described above to be carried out.

Drawings

FIG. 1 is a schematic diagram of a gaze-to-ground scene;

FIG. 2 is a schematic diagram of a ground movement scenario;

fig. 3 is a schematic structural diagram of a communication system according to an embodiment of the present application;

Fig. 4 is a schematic diagram of a second configuration of a communication system according to an embodiment of the present application;

fig. 5 is a schematic diagram of an application scenario of a communication system according to an embodiment of the present application;

fig. 6 is a schematic diagram of a flow of a communication method according to an embodiment of the present application;

Fig. 7 is a schematic diagram of a cell reference point according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 9 is a schematic diagram of a second structure of a communication device according to an embodiment of the present application.

Detailed Description

Base stations/sites in Non-terrestrial networks (Non-TERRESTRIAL NETWORKS, NTN) mainly include near earth orbit (LEO), medium earth orbit (MIDDLE EARTH orbit, MEO), geostationary orbit (geosynchronous earth orbit, GEO), and high altitude platform (high altitude platform station, HAPS) systems. For LEO satellites, there are mainly two scenes, a staring to ground scene and a moving to ground scene. As shown in fig. 1, for a ground gaze scene, a satellite serves a region of the ground for a period of time, that is, as the satellite moves, the satellite adjusts beam pointing, and the satellite directs beams at time t0 and time t1 to the same region, and performs gaze service on the region of the ground. As shown in fig. 2, for a ground-moving scene, the satellite side does not adjust the beam, i.e., the beam moves with the motion of the satellite, and the satellite beam points to different areas at time t0 and time t 1.

Currently, regarding the staring to the ground and the staring to the ground moving, cells are generally selected according to S criteria, i.e. the selection of cells is based on signal quality, including measured reference signal received power (REFERENCE SIGNAL RECEIVING power/REFERENCE SIGNAL RECEIVED power, RSRP) and reference signal received quality (REFERENCE SIGNAL RECEIVED quality, RSRQ). The cell satisfies the S criterion, i.e. the received power Srxlev >0dB in the cell search, and the received signal quality square >0dB in the cell search, srxlev and square satisfy the following formula:

Srxlev=Q_rxlevmeas–(Q_rxlevmin+Q_{rxlevminoffset})–P_compensation-Qoffset_temp

Squal=Q_qualmeas–(Q_qualmin+Q_{qualminoffset})–Qoffset_temp

Wherein, P _compensation＝max(P_max-PU_max,0).Q_rxlevmeas is the RSRP value of the measurement cell, Q _rxlevmin is the lowest reception level of the cell, Q _{rxlevminoffset} is the lowest reception level offset of the cell, P _max is the maximum uplink transmission power allowed by the UE in the cell, and PU _max is the maximum uplink transmission power determined by the UE capability. Q _qualmeas is the RSRQ value of the measurement cell, Q _qualmin is the minimum received signal quality, Q _{qualminoffset} is the minimum received signal received quality offset value, and Qoffset _temp is the temporary power offset.

It can be seen that if the cell is typically selected according to the S criteria, the UE will always select the higher layer satellite access when the higher layer satellite signal quality is greater than the lower layer satellite signal quality. When the quality of the high-layer satellite signal is smaller than that of the low-layer satellite signal, the UE always selects the low-layer satellite to be accessed. If the UE selects the cell according to the criterion of the longest service time, the UE always selects the high-layer satellite for access due to the characteristics of large beam coverage area and slower moving speed of the high-layer satellite. In this way, the utilization rate of satellite resources is reduced, and the UE always selects a satellite with higher access signal quality, resulting in an increase in the frequency of satellite switching.

Aiming at the technical problems, the embodiment of the application provides the following technical scheme.

The technical scheme of the application will be described below with reference to the accompanying drawings.

The technical solution of the embodiment of the present application may be applied to various communication systems, such as a wireless network (Wi-Fi) system, a vehicle-to-any object (vehicle to everything, V2X) communication system, an inter-device (D2D) communication system, a vehicle networking communication system, a fourth generation (4th Generation,4G) mobile communication system, such as an LTE system, a fifth generation (5th Generation,5G) mobile communication system, such as an NR system, and a communication system that evolves after 5G, such as 6G, etc.

In the embodiment of the application, the indication can comprise direct indication and indirect indication, and can also comprise explicit indication and implicit indication. The information indicated by a certain information (such as the first indication information, the second indication information, or the third indication information) is referred to as information to be indicated, and in a specific implementation process, there are various ways of indicating the information to be indicated, for example, but not limited to, the information to be indicated may be directly indicated, such as the information to be indicated itself or an index of the information to be indicated. The information to be indicated can also be indicated indirectly by indicating other information, wherein the other information and the information to be indicated have an association relation. It is also possible to indicate only a part of the information to be indicated, while other parts of the information to be indicated are known or agreed in advance. For example, the indication of the specific information may also be achieved by means of a pre-agreed (e.g., protocol-specified) arrangement sequence of the respective information, thereby reducing the indication overhead to some extent. And meanwhile, the universal part of each information can be identified and indicated uniformly, so that the indication cost caused by independently indicating the same information is reduced.

The specific indication means may be any of various existing indication means, such as, but not limited to, the above indication means, various combinations thereof, and the like. As can be seen from the above, for example, when multiple pieces of information of the same type need to be indicated, different manners of indication of different pieces of information may occur. In a specific implementation process, a required indication mode can be selected according to specific needs, and the selected indication mode is not limited in the embodiment of the present application, so that the indication mode according to the embodiment of the present application is understood to cover various methods that can enable a party to be indicated to learn information to be indicated.

It should be understood that the information to be indicated may be sent together as a whole or may be sent separately in a plurality of sub-information, and the sending periods and/or sending timings of these sub-information may be the same or different. Specific transmission method the embodiment of the present application is not limited. The transmission period and/or the transmission timing of these sub-information may be predefined, for example, predefined according to a protocol, or may be configured by the transmitting node device by transmitting configuration information to the receiving node device.

The "pre-defining" or "pre-configuring" may be implemented by pre-storing corresponding codes, tables, or other manners that may be used to indicate relevant information in the device, and the embodiments of the present application are not limited to the specific implementation manner. Where "save" may refer to saving in one or more memories. The one or more memories may be provided separately or may be integrated in an encoder or decoder, processor, or communication device. The one or more memories may also be provided separately as part of a decoder, processor, or communication device. The type of memory may be any form of storage medium, and embodiments of the application are not limited in this regard.

The "protocol" referred to in the embodiments of the present application may refer to a protocol family in the communication field, a standard protocol similar to a frame structure of the protocol family, or a related protocol applied to a future communication system, which is not specifically limited in the embodiments of the present application.

In the embodiments of the present application, the descriptions of "when..once", "in the case of..once", "if" and the like all refer to that the device will make a corresponding process under some objective condition, and are not limited in time, nor do they require that the device must have a judging action when implemented, nor are other limitations meant to exist.

In the description of the embodiments of the present application, unless otherwise indicated, "/" means that the related objects are in a "or" relationship, for example, a/B may represent a or B, and "and/or" in the embodiments of the present application is merely an association relationship describing the related objects, which means that three relationships may exist, for example, a and/or B, and that a alone exists, while a and B exist, and B alone exists, wherein A, B may be singular or plural. Also, in the description of the embodiments of the present application, unless otherwise indicated, "plurality" means two or more than two. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (a, b or c) of a, b, c, a-b, a-c, b-c, or a-b-c may be represented, wherein a, b, c may be single or plural. In addition, in order to facilitate the clear description of the technical solution of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", etc. are used to distinguish the same item or similar items having substantially the same function and effect. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ. Meanwhile, in the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations or explanations. Any embodiment or implementation described as "exemplary" or "e.g." in an embodiment of the present application should not be taken as preferred or advantageous over other embodiments or implementations. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion that may be readily understood.

The network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and do not constitute a limitation on the technical solution provided by the embodiments of the present application, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of the new service scenario, the technical solution provided by the embodiments of the present application is applicable to similar technical problems.

To facilitate understanding of the embodiments of the present application, a communication system suitable for use in the embodiments of the present application will be described in detail with reference to the communication system shown in fig. 3. Fig. 3 is a schematic diagram of a communication system to which the method according to the embodiment of the present application is applicable.

As shown in fig. 3, the communication system mainly comprises at least one of a terminal and a network device.

In a possible scenario, the communication system may be applied to a 5G or future 6G communication system, such as shown in fig. 4, the communication system 10 includes a radio access network (radio access network, RAN) 100, a Core Network (CN) 200, and the internet 300.RAN 100 includes at least one RAN node (e.g., 110a and 110b in fig. 4, collectively 110) and at least one terminal (e.g., 120a-120j in fig. 4, collectively 120). Other RAN nodes may also be included in the RAN 100, such as wireless relay devices and/or wireless backhaul devices (not shown in fig. 4), and the like. Terminal 120 is connected to RAN node 110 wirelessly. RAN node 110 is connected to core network 200 by wireless or wired means. The core network device in the core network 200 and the RAN node 110 in the RAN 100 may be different physical devices, or may be the same physical device integrated with the core network logic function and the radio access network logic function.

The RAN 100 may be a 3 GPP-related cellular system, e.g., a 4G, 5G mobile communication system, or a future-oriented evolution system (e.g., a 6G mobile communication system). RAN 100 may also be an open RAN, O-RAN or ORAN, a cloud radio access network (cloud radio access network, CRAN), or a Wi-Fi system. RAN 100 may also be a communication system in which two or more of the above systems are converged.

RAN node 110, which may also be referred to as an access network device, a RAN entity, or an access node, etc., forms part of a communication system to facilitate wireless access for terminals. The plurality of RAN nodes 110 in communication system 10 may be the same type of node or different types of nodes. In some scenarios, the roles of RAN node 110 and terminal 120 are relative, e.g., network element 120i in fig. 4 may be a helicopter or drone, which may be configured as a mobile base station, with network element 120i being a base station for those terminals 120j accessing RAN 100 through network element 120i, but network element 120i being a terminal for base station 110 a. RAN node 110 and terminal 120 are sometimes both referred to as communication devices, e.g., network elements 110a and 110b in fig. 4 may be understood as communication devices with base station functionality and network elements 120a-120j may be understood as communication devices with terminal functionality.

In one possible scenario, the RAN node may be a base station (base station), an evolved NodeB (eNodeB), a transmission and reception point (transmission reception point, TRP), a next generation NodeB (gNB), a next generation base station in a 6G mobile communication system, a base station in a future mobile communication system, or an Access Point (AP) in a Wi-Fi system, etc. The RAN node may be a macro base station (e.g., 110a in fig. 4), a micro base station or an indoor station (e.g., 110b in fig. 4), a relay node or a donor node, or a radio controller in a CRAN scenario. Alternatively, the RAN node may also be a server, a wearable device, a vehicle or an in-vehicle device, etc. For example, the access network device in the vehicle extrapolating (vehicle to everything, V2X) technology may be a Road Side Unit (RSU). All or part of the functionality of the RAN node in the present application may also be implemented by software functions running on hardware or by virtualized functions instantiated on a platform, such as a cloud platform. The RAN node in the present application may also be a logical node, a logical module or software capable of implementing all or part of the functions of the RAN node.

In another possible scenario, a plurality of RAN nodes cooperate to assist a terminal in implementing radio access, and different RAN nodes implement part of the functions of a base station, respectively. For example, the RAN node may be a Centralized Unit (CU), a Distributed Unit (DU), a CU-Control Plane (CP), a CU-User Plane (UP), or a Radio Unit (RU), etc. The CUs and DUs may be provided separately or may be included in the same network element, e.g. in a baseband unit (BBU). The RU may be included in a radio frequency device or unit, such as in a remote radio unit (remote radio unit, RRU), an active antenna processing unit (ACTIVE ANTENNA unit, AAU), or a remote radio head (remote radio head, RRH).

In different systems, CUs (or CU-CP and CU-UP), DUs or RUs may also have different names, but the meaning will be understood by those skilled in the art. For example, in ORAN systems, a CU may also be referred to as an O-CU (open CU), a DU may also be referred to as an O-DU, a CU-CP may also be referred to as an O-CU-CP, a CU-UP may also be referred to as an O-CU-UP, and a RU may also be referred to as an O-RU. For convenience of description, the present application is described by taking CU, CU-CP, CU-UP, DU and RU as examples. Any unit of CU (or CU-CP, CU-UP), DU and RU in the present application may be implemented by a software module, a hardware module, or a combination of software and hardware modules.

It will be appreciated that the above-mentioned RAN node may be a newly defined name, and the RAN node may also have different expressions, such as an access node, a network device, a radio access node, etc., which are not limited. The application will be described hereinafter with reference to network devices unless otherwise indicated.

A terminal may also be referred to as a terminal device, user Equipment (UE), mobile station, mobile terminal, etc. Terminals may be widely used in various scenarios, such as device-to-device (D2D), V2X communication, machine-type communication (MTC), internet of things (internet of things, ioT), point of sale (POS) machine, customer terminal equipment (CPE), virtual reality, augmented reality, industrial control, autopilot, telemedicine, smart grid, smart furniture, smart office, smart wear (e.g., smart watches, smart bracelets, pedometers, smart glasses, etc.), smart transportation, smart cities, etc. The terminal may be a cell phone, a tablet computer, a computer with a wireless transceiver function, a wearable device, a vehicle device (e.g., a whole vehicle device, a vehicle-mounted module, a vehicle-mounted chip, a vehicle-mounted unit (OBU) or a car networking terminal BOX (TELEMATICS BOX, T-BOX)), an unmanned aerial vehicle, a helicopter, an airplane, a ship, a robot, a mechanical arm, an intelligent home device, a satellite terminal, etc. The embodiment of the application does not limit the equipment form of the terminal.

The embodiment provided by the application can be applied to satellite communication, and the communication system can be applied to a typical application scene of a satellite network. Fig. 5 is a typical application architecture of a satellite network according to an embodiment of the present application, as shown in fig. 5, a ground mobile terminal UE accesses a data network through a new 5G air interface, and a 5G base station is deployed on a satellite to provide communication services for the UE and is connected to a core network on the ground through a wireless link. Meanwhile, a wireless link exists between satellites, so that signaling interaction and user data transmission between base stations are completed.

The 5G base station mainly provides wireless access service, schedules wireless resources for access terminals, provides reliable wireless transmission protocols and data encryption protocols, and the like.

The 5G core network mainly provides services such as user access control, mobility management, session management, user security authentication, charging and the like. The 5G core network is composed of a plurality of functional units, and can be divided into functional entities of a control plane and a data plane. The control plane mainly comprises access and mobility management function (ACCESS AND mobility management function, AMF) network elements and session management function (session management function, SMF) network elements. The AMF network element is responsible for user access management, security authentication and mobility management. The SMF network element is mainly used for session management in the mobile network, such as session establishment, modification, release. The data plane mainly comprises user plane functions (user plane function, UPF) network elements and is responsible for managing functions of user plane data transmission, flow statistics and the like.

The ground station is responsible for forwarding signaling and traffic data between the satellite base station and the 5G core network.

The 5G new air interface is a wireless link between the terminal and the base station.

The Xn interface is an interface between the 5G base station and the base station, and is mainly used for signaling interaction such as switching.

The NG interface is an interface between the 5G base station and the 5G core network, and mainly interacts non-access stratum (NAS) signaling of the core network and service data of the user.

In the communication system, the terminal selectively accesses more proper network equipment through at least one of the time of serving the cell by the network equipment, the position of the network equipment relative to the cell and the gesture of the terminal relative to the network equipment, so that the utilization rate of network equipment resources is improved, and the network equipment is selected in any combination form of the time, the position and the gesture, so that switching caused by the movement of the network equipment and/or the terminal just accessing the network equipment can be avoided, the switching frequency of the network equipment is reduced, and high-efficiency access is ensured.

The embodiment of the application does not limit the device form of the network device, and the device for realizing the function of the network device can be the network device or can be a device capable of supporting the network device to realize the function, such as a chip system. The apparatus may be installed in a network device or used in cooperation with a network device. In the embodiment of the application, the chip system can be composed of chips, and can also comprise chips and other discrete devices.

The following describes the interaction flow between each network element/device in the above communication system in detail through an embodiment of the method in conjunction with fig. 6. The communication method provided by the embodiment of the application can be applied to the communication system, and is specifically applied to various scenes/processes mentioned in the communication system, and is specifically described below.

Fig. 6 is a flow chart of a communication method according to an embodiment of the present application. The communication method is suitable for the communication system and mainly relates to interaction between the terminal and the network equipment.

As shown in fig. 6, the flow of the communication method is as follows:

s601, the network device acquires first information.

The network equipment is non-ground network equipment, a cell served by the network equipment does not move along with the movement of the network equipment, for example, the embodiment of the application is suitable for staring a scene to the ground, the satellite adjusts beam pointing along with the movement of the satellite, staring service is carried out on the area on the ground, and correspondingly, the cell served by the network equipment is the staring cell to the ground. The first information may include a time at which the network device serves the cell, and/or a location of the network device relative to the cell. The time for the network device to serve the cell may be the remaining time for the network device to serve the cell, or may be the time for the network device to serve the cell, which is not limited herein. The location of the network device relative to the cell may be a reference point where the beam of the network device projects into the cell, which may correspond to the center point of the satellite beam coverage area, for example, as shown in fig. 7.

And S602, the network equipment sends first information to the terminal. Accordingly, the terminal receives the first information from the network device.

The network device may multiplex the existing signaling to issue the first information, e.g. the time the network device serves the cell is carried in a time of Service (t-Service-r 17) signaling, which is broadcast by the system message block 19 (systeminformation block, sib19). For another example, the network device may multiplex reference location (referenceLocation) signaling to issue cell reference point information, which may be used to characterize the location of the network device relative to the cell.

S603, the terminal determines whether to access the network device according to at least one of the time the network device serves the cell, the position of the network device relative to the cell, or the posture of the terminal relative to the network device.

The attitude of the terminal with respect to the network device may include a pitch angle between the terminal and the network device, such as an elevation angle of the terminal with respect to the network device or a depression angle of the network device with respect to the terminal, although other angles between the terminal and the network device may be included, and are not limited herein. The terminal may calculate the elevation angle information Q _anglemeas with the satellites by itself through the terminal position and the satellite position, e.g., the terminal calculates the elevation angle information Q _anglemeas with the satellites through a global navigation satellite system (global navigation SATELLITE SYSTEM, GNSS) and satellite ephemeris. The terminal determines whether the network device meets the selection criteria, i.e. whether to access the network device, based on at least one of the above mentioned times, locations, attitudes.

Optionally, the terminal may also determine whether to access the network device by at least one of time, location, attitude, and signal quality. The signal quality may include RSRP and RSRQ, among others.

In one possible implementation, S603 may include accessing the network device by the terminal if the time for the network device to serve the cell is greater than or equal to a preset time threshold.

It will be appreciated that the time the network device serves the cell may be the remaining time the network device serves the cell. The preset time threshold value may represent a minimum required service time, and if the remaining time of the network device serving the cell is greater than or equal to the minimum required service time, the network device meets a selection criterion of the terminal, and the terminal accesses the network device. If the remaining time of the network device serving the cell is less than the minimum required service time, the terminal is not accessed to the network device. Therefore, the terminal performs satellite selection based on the time of the network equipment serving the cell, so that the switching frequency caused by the movement of the network equipment is reduced, the terminal selects a more suitable satellite, and high-efficiency access is ensured.

In addition, if the time that the network device serves the cell is used for indicating the time that the network device has served the cell, the preset time threshold value may represent the maximum served time, and if the time that the network device has served the cell is smaller than or equal to the maximum served time, the network device accords with the selection standard of the terminal, and the terminal accesses the network device.

Optionally, prior to S603, the communication method may further include the terminal receiving a preset time threshold value from the network device. It can be understood that the preset time threshold value can be carried in the newly added time signaling, and the terminal can obtain the preset time threshold value by receiving the newly added time signaling from the network device, so that the overhead of the terminal side is reduced. For example, the network device broadcasts a message via SIB19 or other system message block (systeminformation block, SIB) containing Q _timemin, where Q _timemin represents the minimum required service time. Of course, the preset time threshold may also be a threshold determined by the terminal by itself, which is not limited herein.

In a possible implementation, S603 may further include accessing the network device by the terminal when the time for serving the cell by the network device is greater than or equal to a preset time threshold and the signal quality of the cell satisfies a preset condition.

It is understood that the signal quality of the cell may include a received power in the cell search and a signal quality received in the cell search, and the preset condition may include a preset power threshold corresponding to the received power and a preset quality threshold corresponding to the signal quality received in the cell search. If the time of the network device serving the cell is greater than or equal to the preset time threshold, the received power is greater than the preset power threshold, and the quality of the signal received in the cell search is greater than the preset quality threshold, the terminal accesses the network device. For example, the conditions that the terminal selection satellite needs to satisfy are Srxlev 0, squal 0 and Stime 0, where Srxlev and Squal are described as the above S criteria and are not described in detail herein. Stime =t1-Q _timemin, where t1 is the remaining service time of the network device for the cell, and Q _timemin is a preset time threshold. In this way, the terminal performs satellite selection based on the S criterion and the time of serving the cell by the network equipment at the same time, so that the switching problem caused by the satellite when the satellite is just accessed is avoided.

In one possible implementation, S603 may include accessing the network device by the terminal if a distance between a location of the terminal and a location of the network device relative to the cell is less than or equal to a preset distance threshold value.

It will be appreciated that the location of the terminal may be obtained by GNSS and the location of the network device relative to the cell may be cell reference point information issued by the network device. The preset distance threshold value may represent a maximum distance between the terminal and the cell reference point, and if the distance between the terminal and the cell reference point is smaller than or equal to the preset distance threshold value, the network device meets a selection criterion of the terminal, and the terminal accesses the network device. Therefore, when the distance between the terminal and the cell reference point is large, for example, when the terminal is at the edge of the cell covered by the satellite beam, namely, when the terminal is far away from the central point of the satellite beam coverage area, the terminal does not select the satellite to be accessed, so that the switching problem caused by the movement of the terminal can be avoided when the satellite is accessed.

Optionally, before S603, the communication method may further include the terminal receiving a preset distance threshold value from the network device. It may be appreciated that the preset distance threshold may be carried in the newly added distance signaling, and the terminal may obtain the preset distance threshold by receiving the newly added distance signaling from the network device, for example, the network device broadcasts a message through SIB19 or other SIBs, where Q _dismin indicates a maximum distance between the terminal and the cell reference point, and Q _dismin is included in the message. The preset distance threshold value may also multiplex the distance threshold (DISTANCETHRESH) defined in the standard, i.e. Q _dismin = DISTANCETHRESH. Of course, the preset distance threshold value may also be a threshold value determined by the terminal by itself, which is not limited herein.

In a possible implementation, S603 may further include accessing the network device by the terminal if a distance between a location of the terminal and a location of the network device relative to the cell is less than or equal to a preset distance threshold value, and a signal quality of the cell satisfies a preset condition. For example, the conditions that the terminal selection satellite needs to satisfy are Srxlev 0, squal 0 and Sdis 0, where Srxlev and Squal are described as the above S criteria and are not described in detail herein. Sdis =dis (ue_gnss, referenceLocation) -Q _dismin, where dis (ue_gnss, referenceLocation) represents the distance between the location of the terminal and the location of the network device relative to the cell, Q _dismin is a preset distance threshold. In this way, the terminal performs satellite selection based on the S criterion and the position of the network device relative to the cell at the same time, so as to avoid the handover problem caused by the terminal when the satellite is just accessed.

In a possible implementation, S603 may further include accessing the network device by the terminal when the time for the network device to serve the cell is greater than or equal to a preset time threshold, a distance between a location of the terminal and a location of the network device relative to the cell is less than or equal to a preset distance threshold, and a signal quality of the cell satisfies a preset condition. For example, the conditions that the terminal selection satellite needs to satisfy are Srxlev 0, square 0, stime 0, and Sdis 0, where Srxlev, squal, stime and Sdis are described above and are not described here. In this way, the terminal performs satellite selection based on the S criteria, time and location at the same time, avoiding handover problems caused by the satellite and/or the terminal upon access to the satellite.

In one possible implementation, the attitude of the terminal relative to the network device includes a pitch angle between the terminal and the network device, and S603 may further include accessing the network device if the pitch angle between the terminal and the network device is greater than or equal to a preset angle threshold value.

It can be appreciated that the pitch angle between the terminal and the network device may be calculated by GNSS and satellite ephemeris, and the preset angle threshold may represent pitch angle information between the minimum required terminal and the network device. If the pitch angle between the terminal and the network equipment is larger than or equal to the preset angle threshold value, the network equipment accords with the selection standard of the terminal, and the terminal is accessed to the network equipment. Because the larger the pitch angle between the terminal and the network device is, the better the signal quality of the network device serving the terminal is, for example, when the pitch angle between the terminal and the satellite is 90 degrees, the satellite is positioned right above the terminal, and the signal quality of the satellite serving the terminal is the best, when the pitch angle between the terminal and the satellite does not meet the minimum required pitch angle, the terminal does not select the satellite to access, and the problem of switching caused by the terminal and/or the satellite when the satellite is accessed can be avoided.

Optionally, before S603, the communication method may further include the terminal receiving a preset angle threshold value from the network device. It can be understood that the preset angle threshold value can be carried in the newly added angle signaling, and the terminal can obtain the preset angle threshold value by receiving the newly added angle signaling from the network device, so that the overhead of the terminal side is reduced. For example, the network device broadcasts a message via SIB19 or other SIBs, where Q _anglemin is included in the message, where Q _anglemin represents the minimum required pitch angle information between the terminal and the network device. Of course, the preset angle threshold value may also be a threshold value determined by the terminal itself, which is not limited herein.

In a possible implementation, S603 may further include accessing the network device by the terminal if a pitch angle between the terminal and the network device is greater than or equal to a preset angle threshold value and a signal quality of the cell satisfies a preset condition. For example, the conditions that the terminal selection satellite needs to satisfy are Srxlev 0, squal 0 and Sangle 0, wherein the formulas that Srxlev and Squal satisfy are as described in the above S criterion, and are not described here. Sangle =q _anglemeas–Q_anglemin, where Q _anglemeas represents a pitch angle between the terminal and the network device, and Q _anglemin is a preset angle threshold value. Therefore, the terminal performs satellite selection based on the S criterion and the pitch angle between the terminal and the network equipment, so that the switching frequency caused by the movement of the terminal is reduced, the terminal selects a more suitable satellite, and high-efficiency access is ensured.

In a possible implementation, S603 may further include accessing the network device by the terminal when a time for the network device to serve the cell is greater than or equal to a preset time threshold, a pitch angle between the terminal and the network device is greater than or equal to a preset angle threshold, and a signal quality of the cell satisfies a preset condition. For example, the conditions that the terminal selection satellite needs to satisfy are Srxlev 0, square 0, stime 0, and Sangle 0, where Srxlev, squal, stime and Sangle are described above and are not described here. In this way, the terminal performs satellite selection based on the S criteria, time and angle at the same time, reducing the frequency of handoff due to satellite and/or terminal movement.

In one possible implementation, at least one of the following may further comprise a signal quality of the cell, and S603 may further comprise determining a first sum of a first weight value obtained by weighting the signal quality according to the first weight value and a second weight value obtained by weighting the time according to the second weight value. And accessing the network equipment under the condition that the first sum value is larger than or equal to a first preset value.

It will be appreciated that the first weighting value may comprise a weighting value obtained by weighting the received power in the cell search and a weighting value obtained by weighting the received signal quality in the cell search, e.g. a weighting value a x Srxlev by a weighting parameter a and a weighting value b x square by a weighting parameter b. The first weighting value may be, for example, a weighting value c×t1 obtained by performing a time weighting process on the network device serving the cell by using the weighting parameter c, where the first sum value is a×srxlev+b×square+c×t1, the condition that the terminal selects the satellite to satisfy is a×srxlev+b×square+c×t1 Σ1, a is a first preset value, and the first preset value may be a value arbitrarily selected according to the actual situation, for example, a is 0.

Optionally, the second weight may be obtained by weighting a difference between a time when the network device serves the cell and a preset time threshold according to the second weight, for example, the second weight is a weight c× Stime obtained by weighting Stime with a weight parameter c, where Stime =t1-Q _timemin, t1 is a remaining service time when the network device serves the cell, and Q _timemin is a preset time threshold. At this time, the first sum is a×srxlev+b×square+c× Stime, and the condition that the terminal needs to satisfy for selecting the satellite is a×srxlev+b×square+c× Stime.

Alternatively, the first sum may be a sum of the first weighted value, the second weighted value and the constant, for example, the first sum is a×srxlev+b×square+c× Stime +d, and the condition that the terminal needs to satisfy for selecting the satellite is a×srxlev+b×square+c× Stime +d is greater than or equal to 0.

Optionally, the communication method may further comprise, prior to determining the first sum of the first weight and the second weight, the terminal receiving the first weight and the second weight from the network device.

It will be appreciated that the terminal may obtain the weighting parameters by receiving newly added signaling from the network device, e.g., the network device broadcasts a message via SIB19 or other SIB, which contains the cell selection weighting parameters a, b, c, or a, b, c, d. Therefore, the terminal performs satellite selection based on the S criterion and time in a weighted mode, and weight values of the signal quality and the time can be respectively selected according to the importance degree of the signal quality and the time, so that the flexibility of satellite selection of the terminal is improved.

In one possible implementation, the communication method may further include determining a difference between the first sum and a third weight, wherein the third weight is obtained by weighting a distance between a location of the terminal and a location of the network device relative to the cell according to the third weight. And accessing the network equipment under the condition that the difference value is greater than or equal to a second preset value.

It may be appreciated that the third weight may be, for example, a weight e x Sdis obtained by weighting Sdis by a weight e, where Sdis represents a distance between a location of the terminal and a location of the network device relative to the cell. At this time, the difference between the first sum and the third weighted value is a×srxlev+b×square+c× Stime-e× Sdis, the condition that the terminal needs to satisfy for selecting the satellite is a×srxlev+b×square+c× Stime-e× Sdis +_b, and B is a second preset value, which may be a value arbitrarily selected according to the actual situation.

Optionally, since the first sum may be a sum of the first weighted value, the second weighted value and the constant, the difference between the first sum and the third weighted value may be, for example, a×srxlev+b×square+c× Stime +d-e× Sdis, and the condition that the terminal needs to satisfy for selecting the satellite is a×srxlev+b×square+c× Stime +d-e× Sdis +_b, and B may be 0.

Optionally, the communication method may further comprise the terminal receiving a third weight value from the network device before determining the difference between the first sum value and the third weight value.

It will be appreciated that the terminal may obtain the weighting parameters by receiving newly added signaling from the network device, e.g., the network device broadcasts a message via SIB19 or other SIB, which includes the cell selection weighting parameters a, b, c, e or a, b, c, e, d. Therefore, the terminal performs satellite selection based on the S criterion, the time and the position in a weighted mode, and weight values corresponding to the signal quality, the time and the position can be selected according to the importance degree of the signal quality, the time and the position, so that the flexibility of satellite selection of the terminal is improved.

In one possible implementation, the attitude of the terminal relative to the network device includes a pitch angle between the terminal and the network device, and the communication method may further include determining a second sum of the first weight, the second weight, and a fourth weight, the fourth weight being obtained by weighting the pitch angle according to the fourth weight. And accessing the network equipment under the condition that the second sum value is larger than or equal to a third preset value.

It may be appreciated that the fourth weight may be, for example, a weight f Sangle obtained by weighting Sangle by a weight parameter f, where Sangle represents a pitch angle between the terminal and the network device. At this time, the second sum is a×srxlev+b×square+c× Stime +f× Sangle, the condition that the terminal needs to satisfy for selecting the satellite is a×srxlev+b×square+c× Stime +f× Sangle +_c, and C is a third preset value, which may be a value arbitrarily selected according to the actual situation.

Optionally, the second sum may be a sum of the first weight, the second weight, the fourth weight, and a constant, for example, the second sum is a×srxlev+b×square+c× Stime +f× Sangle +d, a condition that the terminal needs to satisfy for selecting the satellite is a×srxlev+b×square+c× Stime +f× Sangle +d.

Optionally, the communication method may further comprise receiving a fourth weight value from the network device before determining the second sum of the first weight value, the second weight value and the fourth weight value.

It will be appreciated that the terminal may obtain the weighting parameters by receiving newly added signaling from the network device, e.g., the network device broadcasts a message via SIB19 or other SIB, which includes the cell selection weighting parameters a, b, c, f or a, b, c, f, d. Therefore, the terminal performs satellite selection based on the S criterion, the time and the angle in a weighted mode, and weight values corresponding to the signal quality, the time and the angle can be selected according to the importance degree of the signal quality, the time and the angle, so that the flexibility of satellite selection of the terminal is improved.

In summary, the terminal selectively accesses the more suitable network device through at least one of the time of serving the cell by the network device, the position of the network device relative to the cell, and the gesture of the terminal relative to the network device, thereby improving the utilization rate of the network device resources, and selecting the network device through any combination of the time, the position, and the gesture, so that the switching caused by the network device and/or the terminal movement can be avoided when the terminal is just accessed to the network device, the switching frequency of the network device is reduced, and the high-efficiency access is ensured.

The method provided by the embodiment of the application is described in detail above with reference to fig. 6-7. A communication apparatus for performing the communication method provided by the embodiment of the present application is described in detail below with reference to fig. 8 to 9.

Fig. 8 is a schematic structural diagram of a communication device according to an embodiment of the present application. Illustratively, as shown in FIG. 8, the communications device 800 includes a transceiver module 801 and a processing module 802. For convenience of explanation, fig. 8 shows only major components of the communication apparatus.

The transceiver module 801 is configured to perform the transceiver function of the method shown in fig. 6, and the processing module 802 is configured to perform functions of the method shown in fig. 6 other than the transceiver function.

Alternatively, the transceiver module 801 may include a transmitting module (not shown in fig. 8) and a receiving module (not shown in fig. 8). The transmitting module is configured to implement a transmitting function of the communication device 800, and the receiving module is configured to implement a receiving function of the communication device 800.

Optionally, the communication device 800 may further comprise a storage module (not shown in fig. 8) storing programs or instructions. The processing module 802, when executing the program or instructions, enables the communication apparatus 800 to perform the functions of a terminal or a network device in the method shown in fig. 6 in the above-mentioned method.

It is to be appreciated that the communication apparatus 800 may be a terminal or a network device, a chip (system) or other parts or components that may be disposed in the terminal or the network device, or an apparatus including the terminal or the network device, which is not limited in the present application.

In addition, the technical effects of the communication apparatus 800 may refer to the technical effects of the communication method shown in fig. 6, and will not be described herein.

Fig. 9 is a schematic diagram of a second structure of a communication device according to an embodiment of the present application. The communication device may be a terminal, or may be a chip (system) or other part or component that may be provided in the terminal, for example. As shown in fig. 9, the communication device 900 may include a processor 901. Optionally, the communication device 900 may also include a memory 902 and/or a transceiver 903. The processor 901 is coupled to the memory 902 and/or the transceiver 903, for example, via a communication bus, via an on-chip interface, or via other communication lines. Alternatively, the memory 902 may be integrated with the processor 901.

The following describes the respective constituent elements of the communication apparatus 900 in detail with reference to fig. 9:

The processor 901 is a control center of the communication device 900, and may be one processor or a collective term of a plurality of processing elements. For example, processor 901 is one or more central processing units (central processing unit, CPU), or may be an Application SPECIFIC INTEGRATED Circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present application, such as one or more microprocessors (DIGITAL SIGNAL processors, DSPs), or one or more field programmable gate arrays (field programmable GATE ARRAY, FPGAs).

Alternatively, the processor 901 may perform various functions of the communication apparatus 900, such as performing the communication method shown in fig. 6 described above, by running or executing a software program stored in the memory 902 and invoking data stored in the memory 902.

In a particular implementation, processor 901 may include one or more CPUs, such as CPU0 and CPU1 shown in fig. 9, as one embodiment.

In a specific implementation, as an embodiment, the communication apparatus 900 may also include a plurality of processors, such as the processor 901 and the processor 904 shown in fig. 9. Each of these processors may be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

The memory 902 is configured to store a software program for executing the solution of the present application, and the processor 901 controls the execution of the software program, and the specific implementation manner may refer to the above method embodiment, which is not described herein again.

Alternatively, memory 902 may be, but is not limited to, read-only memory (ROM) or other type of static storage device that can store static information and instructions, random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, or electrically erasable programmable read-only memory (ELECTRICALLY ERASABLE PROGRAMMABLE READ-only memory, EEPROM), compact disc read-only memory (compact disc read-only memory) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 902 may be integrated with the processor 901 or may exist separately and be coupled to the processor 901 through an interface circuit (not shown in fig. 9) of the communication device 900, which is not specifically limited by the embodiment of the present application.

A transceiver 903 for communication with other communication devices. For example, the communication apparatus 900 is a terminal, and the transceiver 903 may be used to communicate with a network device or another terminal device. As another example, the communication apparatus 900 is a network device, and the transceiver 903 may be used to communicate with a terminal or another network device.

Alternatively, the transceiver 903 may include a receiver and a transmitter (not separately shown in fig. 9). The receiver is used for realizing the receiving function, and the transmitter is used for realizing the transmitting function.

Alternatively, transceiver 903 may be integrated with processor 901 or may exist separately and be coupled to processor 901 via interface circuitry (not shown in fig. 9) of communication device 900, as embodiments of the present application are not specifically limited in this regard.

It will be appreciated that the configuration of the communication device 900 shown in fig. 9 is not limiting of the communication device, and that an actual communication device may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.

In addition, the technical effects of the communication device 900 may refer to the technical effects of the method described in the above method embodiments, which are not described herein.

It is to be appreciated that the processor in embodiments of the application may be a central processing unit (central processing unit, CPU), which may also be other general purpose processors, DSP, ASIC, FPGA or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be ROM, programmable ROM (PROM), erasable programmable ROM (erasable PROM), EEPROM, or flash memory, among others. The volatile memory may be random access memory (random access memory, RAM) which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as static random access memory (STATIC RAM, SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (doubledata RATE SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (ENHANCED SDRAM, ESDRAM), synchronous link dynamic random access memory (SYNCHLINK DRAM, SLDRAM), and direct memory bus random access memory (direct rambus RAM, DR RAM).

The above embodiments may be implemented in whole or in part by software, hardware (e.g., circuitry), firmware, or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center by wired (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more sets of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.

It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B, and may mean that a exists alone, while a and B exist alone, and B exists alone, wherein a and B may be singular or plural. In addition, the character "/" herein generally indicates that the associated object is an "or" relationship, but may also indicate an "and/or" relationship, and may be understood by referring to the context.

In the present application, "at least one" means one or more, and "a plurality" means two or more. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (a, b, or c) of a, b, c, a-b, a-c, b-c, or a-b-c may be represented, wherein a, b, c may be single or plural.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes the aforementioned various possible memories.

Claims

1. A communication method, comprising:

receiving first information from a network device, where the network device is a non-terrestrial network device, the first information including a time when the network device serves a cell and/or a location of the network device relative to the cell;

Whether to access the network device is determined according to at least one of the following: the time during which the network device serves a cell, the position of the network device relative to the cell, or the posture of the terminal relative to the network device.

2. The method according to claim 1, wherein determining whether to access the network device according to at least one of the following comprises:

When the time for which the network device serves the cell is greater than or equal to a preset time threshold, the network device is accessed.

3. The method according to claim 1, wherein determining whether to access the network device according to at least one item comprises:

When the distance between the position of the terminal and the position of the network device relative to the cell is less than or equal to a preset distance threshold, access the network device.

4. The method according to claim 1, wherein the posture of the terminal relative to the network device comprises a pitch angle between the terminal and the network device; and the determining whether to access the network device according to at least one of the following comprises:

When the elevation angle between the terminal and the network device is greater than or equal to a preset angle threshold, the terminal accesses the network device.

5. The method according to any one of claims 1 to 4, wherein the at least one of the following items further comprises a signal quality of the cell; and the determining whether to access the network device according to the at least one of the following items comprises:

Determining a first sum of a first weighted value and a second weighted value, wherein the first weighted value is obtained by weighting the signal quality according to the first weighted value, and the second weighted value is obtained by weighting the time according to the second weighted value;

When the first sum is greater than or equal to a first preset value, the network device is accessed.

6. The method according to claim 5, characterized in that before determining the first sum of the first weighted value and the second weighted value, the method further comprises:

The first weight value and the second weight value are received from a network device.

7. The method according to claim 5 or 6, further comprising:

determining a difference between the first sum and a third weighted value, wherein the third weighted value is obtained by weighting the distance between the position of the terminal and the position of the network device relative to the cell according to the third weighted value;

When the difference is greater than or equal to a second preset value, the network device is accessed.

8. The method according to claim 7, characterized in that before determining the difference between the first sum and the third weighted value, the method further comprises:

The third weight value is received from a network device.

9. The method according to claim 5 or 6, wherein the posture of the terminal relative to the network device comprises a pitch angle between the terminal and the network device; the method further comprising:

determining a second sum of the first weighted value, the second weighted value, and a fourth weighted value, where the fourth weighted value is obtained by weighting the pitch angle according to the fourth weighted value;

When the second sum is greater than or equal to a third preset value, the network device is accessed.

10. The method according to claim 9, characterized in that before determining the second sum of the first weighted value, the second weighted value, and the fourth weighted value, the method further comprises:

The fourth weight value is received from a network device.

11. A communication method, comprising:

A network device acquires first information, where the network device is a non-terrestrial network device, and the first information includes a time when the network device serves a cell and/or a position of the network device relative to the cell;

The network device sends the first information to the terminal.

12. The method according to claim 11, further comprising:

The network device sends second information to the terminal, where the second information includes at least one of the following: a preset time threshold, a preset distance threshold, or a preset angle threshold.

13. The method according to claim 11 or 12, further comprising:

The network device sends third information to the terminal, and the third information includes at least one of the following: a first weight value, a second weight value, a third weight value, or a fourth weight value, wherein the first weight value is associated with the signal quality of the cell, the second weight value is associated with the time when the network device serves the cell, the third weight value is associated with the distance between the position of the terminal and the position of the network device relative to the cell, and the fourth weight value is associated with the posture of the terminal relative to the network device.

14 . The method according to claim 13 , wherein the posture of the terminal relative to the network device comprises a pitch angle between the terminal and the network device.

15. A communication device, characterized in that the device comprises: a module for executing the method according to any one of claims 1 to 14.

16. A communication device, characterized in that the communication device comprises: a processor and a memory; the memory is used to store computer instructions, and when the processor executes the instructions, the method according to any one of claims 1 to 14 is executed.

17. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a computer program or instructions, and when the computer program or instructions are executed on a computer, the computer is caused to execute the method according to any one of claims 1 to 14.

18. A computer program product, characterized in that the computer program product comprises a computer program or instructions, and when the computer program or instructions are run on a computer, the computer is caused to perform the method according to any one of claims 1 to 14.