CN115211224B

CN115211224B - Communication method, device, communication equipment and storage medium

Info

Publication number: CN115211224B
Application number: CN202080004362.1A
Authority: CN
Inventors: 朱亚军; 洪伟; 王天佳; 李勇
Original assignee: Beijing University of Posts and Telecommunications; Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing University of Posts and Telecommunications; Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2024-04-26
Anticipated expiration: 2040-12-30
Also published as: CN115211224A; WO2022141162A1

Abstract

The communication method is applied to a network side and comprises the following steps: according to the auxiliary information of the terminal, transmitting the indication information of the TFTA of the ground fixed tracking area to which the terminal belongs; the auxiliary information at least includes: position information of the terminal and movement status information of the terminal.

Description

Communication method, device, communication equipment and storage medium

Technical Field

The present disclosure relates to the field of wireless communication technology, and in particular, but not limited to, a communication method, apparatus, communication device, and storage medium.

Background

In a New air interface (NR) protocol of 5G, when there is downlink data to be sent to a terminal in an idle state and a terminal in an inactive state, a paging message needs to be broadcast in a tracking area (TA, tracking Area) where the terminal is located, so as to page the terminal and send the downlink data to the terminal.

In a Non-terrestrial network (NTN, non-TERRESTRIAL NETWORKS), when the terminal moves or the tracking area where the terminal is located changes due to satellite movement in the NTN network, the terminal is required to perform tracking area Update (TAU, tracking Area Update) so that the NTN network can track the terminal.

Disclosure of Invention

The embodiment of the disclosure discloses a communication method, a device, a communication device and a storage medium

According to a first aspect of embodiments of the present disclosure, the present disclosure provides a communication method, where the method is applied to a network side, and the method includes:

According to the auxiliary information of the terminal, issuing indication information of a ground fixed tracking area TFTA to which the terminal belongs;

The auxiliary information at least comprises: position information of the terminal and movement condition information of the terminal.

According to a second aspect of embodiments of the present disclosure, there is provided a communication method, applied to a terminal, the method including:

Receiving indication information of TFTA to which a terminal belongs; wherein, the TFTA is determined according to auxiliary information of the terminal; the auxiliary information at least comprises: the position information of the terminal and the movement condition information of the terminal;

and carrying out TAU according to the indication information.

According to a third aspect of embodiments of the present disclosure, there is provided a communication apparatus, where the apparatus is applied to a network side, and includes a first sending module, where the first sending module is configured to:

According to the auxiliary information of the terminal, issuing the indication information of the TFTA to which the terminal belongs;

According to a fourth aspect of embodiments of the present disclosure, there is provided a communication apparatus, wherein the apparatus is applied to a terminal, the apparatus comprising a second receiving module and an updating module, wherein,

The second receiving module is configured to: receiving indication information of TFTA to which a terminal belongs; wherein, the TFTA is determined according to auxiliary information of the terminal; the auxiliary information at least comprises: the position information of the terminal and the movement condition information of the terminal;

the update module is configured to: and carrying out TAU according to the indication information.

According to a fifth aspect of embodiments of the present disclosure, there is provided a communication device comprising:

A processor;

a memory for storing the processor-executable instructions;

Wherein the processor is configured to: for executing the executable instructions, implementing the methods described in any of the embodiments of the present disclosure.

According to a sixth aspect of embodiments of the present disclosure, there is provided a computer storage medium storing a computer executable program which, when executed by a processor, implements the method of any embodiment of the present disclosure.

In the embodiment of the disclosure, according to auxiliary information of a terminal, indication information of a TFTA to which the terminal belongs is issued; the auxiliary information at least comprises: position information of the terminal and movement condition information of the terminal. Here, since the indication information is determined according to the assistance information of the terminal, the TFTA to which the terminal belongs can be adapted to the location of the terminal and the movement condition of the terminal. In wireless communication in NTN, on the one hand, it is possible to reduce frequent TAU by the terminal due to setting of the fixed TFTA, compared to the manner of setting the fixed TFTA to the terminal; on the other hand, the TFTA can adapt to the position and the movement condition of the terminal, and the efficiency of accurately paging the terminal can be improved.

Drawings

Fig. 1 is a schematic diagram illustrating a structure of a wireless communication system according to an exemplary embodiment.

FIG. 2 is a schematic diagram of a tracking area shown in accordance with an exemplary embodiment.

Fig. 3 is a flow chart illustrating a communication method according to an exemplary embodiment.

Fig. 4 is a schematic diagram of an update tracking area TA, according to an example embodiment.

Fig. 5 is a schematic diagram of an update tracking area TA, according to an example embodiment.

Fig. 6 is a schematic diagram of an update tracking area TA, according to an example embodiment.

Fig. 7 is a flow chart illustrating a communication method according to an exemplary embodiment.

Fig. 8 is a flow chart illustrating a communication method according to an exemplary embodiment.

Fig. 9 is a flow chart illustrating a communication method according to an exemplary embodiment.

Fig. 10 is a flow chart illustrating a communication method according to an exemplary embodiment.

Fig. 11 is a flow chart illustrating a communication method according to an exemplary embodiment.

Fig. 12 is a flow chart illustrating a communication method according to an exemplary embodiment.

Fig. 13 is a flow chart illustrating a communication method according to an exemplary embodiment.

Fig. 14 is a flow chart illustrating a communication method according to an exemplary embodiment.

Fig. 15 is a flow chart illustrating a communication method according to an exemplary embodiment.

Fig. 16 is a flow chart illustrating a communication method according to an exemplary embodiment.

Fig. 17 is a schematic diagram of an update tracking area TA, according to an example embodiment.

Fig. 18 is a flow chart illustrating a communication method according to an exemplary embodiment.

Fig. 19 is a flow chart illustrating a communication method according to an exemplary embodiment.

Fig. 20 is a schematic diagram illustrating an apparatus of a communication method according to an exemplary embodiment.

Fig. 21 is a schematic diagram illustrating an apparatus of a communication method according to an exemplary embodiment.

Fig. 22 is a schematic structural view of a terminal according to an exemplary embodiment.

Fig. 23 is a block diagram of a base station, according to an example embodiment.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the embodiments of the present disclosure. Rather, they are merely examples of apparatus and methods consistent with aspects of embodiments of the present disclosure as detailed in the accompanying claims.

The terminology used in the embodiments of the disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the disclosure. As used in this disclosure of embodiments and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in embodiments of the present disclosure to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of embodiments of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "in response to a determination" depending on the context.

For purposes of brevity and ease of understanding, the terms "greater than" or "less than" are used herein in characterizing a size relationship. But it will be appreciated by those skilled in the art that: the term "greater than" also encompasses the meaning of "greater than or equal to," less than "also encompasses the meaning of" less than or equal to.

Referring to fig. 1, a schematic structural diagram of a wireless communication system according to an embodiment of the disclosure is shown. As shown in fig. 1, the wireless communication system is a communication system based on a mobile communication technology, and may include: a number of user equipments 110 and a number of base stations 120.

User device 110 may be, among other things, a device that provides voice and/or data connectivity to a user. The user equipment 110 may communicate with one or more core networks via a radio access network (Radio Access Network, RAN), and the user equipment 110 may be internet of things user equipment such as sensor devices, mobile phones (or "cellular" phones) and computers with internet of things user equipment, for example, stationary, portable, pocket, hand-held, computer-built-in or vehicle-mounted devices. Such as a Station (STA), subscriber unit (subscriber unit), subscriber Station (subscriber Station), mobile Station (mobile Station), remote Station (remote Station), access point, remote user equipment (remote terminal), access user equipment (ACCESS TERMINAL), user device (user terminal), user agent (user agent), user device (user device), or user equipment (user request). Or the user device 110 may be a device of an unmanned aerial vehicle. Alternatively, the user device 110 may be a vehicle-mounted device, for example, a laptop with a wireless communication function, or a wireless user device with an external laptop. Alternatively, the user device 110 may be a roadside device, for example, a street lamp, a signal lamp, or other roadside devices with wireless communication function.

The base station 120 may be a network-side device in a wireless communication system. Wherein the wireless communication system may be a fourth generation mobile communication technology (the 4th generation mobile communication,4G) system, also known as a long term evolution (Long Term Evolution, LTE) system; or the wireless communication system can also be a 5G system, also called a new air interface system or a 5G NR system. Or the wireless communication system may be a next generation system of the 5G system. Among them, the access network in the 5G system may be called NG-RAN (New Generation-Radio Access Network, new Generation radio access network).

The base station 120 may be an evolved node b (eNB) employed in a 4G system. Alternatively, the base station 120 may be a base station (gNB) in a 5G system that employs a centralized and distributed architecture. When the base station 120 adopts a centralized and distributed architecture, it generally includes a Centralized Unit (CU) and at least two Distributed Units (DUs). A protocol stack of a packet data convergence protocol (PACKET DATA Convergence Protocol, PDCP) layer, a radio link layer Control protocol (Radio Link Control, RLC) layer, and a medium access Control (MEDIA ACCESS Control, MAC) layer is arranged in the centralized unit; a Physical (PHY) layer protocol stack is provided in the distribution unit, and the specific implementation of the base station 120 is not limited in the embodiments of the present disclosure.

A wireless connection may be established between the base station 120 and the user equipment 110 over a wireless air interface. In various embodiments, the wireless air interface is a fourth generation mobile communication network technology (4G) standard-based wireless air interface; or the wireless air interface is a wireless air interface based on a fifth generation mobile communication network technology (5G) standard, for example, the wireless air interface is a new air interface; or the wireless air interface can also be a wireless air interface based on the technical standard of the next generation mobile communication network of 5G.

In some embodiments, an E2E (End to End) connection may also be established between the user devices 110. Such as V2V (vehicle to vehicle, vehicle-to-vehicle) communications, V2I (vehicle to Infrastructure, vehicle-to-roadside device) communications, and V2P (vehicle to pedestrian, vehicle-to-person) communications among internet of vehicles communications (vehicle to everything, V2X).

Here, the above-described user equipment can be regarded as the terminal equipment of the following embodiment.

In some embodiments, the wireless communication system described above may also include a network management device 130.

Several base stations 120 are respectively connected to a network management device 130. The network management device 130 may be a core network device in a wireless communication system, for example, the network management device 130 may be a Mobility management entity (Mobility MANAGEMENT ENTITY, MME) in an evolved packet core (Evolved Packet Core, EPC). Or the network management device may be other core network devices, such as a service GateWay (SERVING GATEWAY, SGW), a public data network GateWay (Public Data Network GateWay, PGW), a Policy AND CHARGING Rules Function (PCRF), or a home subscriber server (Home Subscriber Server, HSS), etc. The embodiment of the present disclosure is not limited to the implementation form of the network management device 130.

In order to better understand the technical solutions described in any embodiment of the present disclosure, first, a scenario of wireless communication will be described by an embodiment.

In 5G NR, for a terminal in an idle state and a terminal in an inactive state, when a network has downlink data to be transmitted to the terminal, a concept of a registration area (RA, registration Area) is introduced in order for the network to be able to page the terminal.

In one embodiment, RA may be a set of TAs.

In one embodiment, each TA includes one or more cells.

In one embodiment, one cell can only belong to one TA.

In one embodiment, each TA corresponds to a geographic area.

In one embodiment, each TA is determined by a TA identity (TAI, TA Identity).

In one embodiment, the TAI includes a public land mobile network (PLMN, public Land Mobile Network) and a tracking area Code (TAC, tracking Area Code).

In one embodiment, the network sends the PLMN and TAC to the terminal by broadcasting a system message.

In one embodiment, a plurality of TAs are configured for a terminal through a network.

In one embodiment, the network configures a TA list TAL for the terminal (TAL, tracking Area List).

In one embodiment, one TA list includes a plurality of TAs.

In one embodiment, when the terminal moves from TA1 (tracking area 1) to TA2 (tracking area 2), the terminal needs to initiate a TAU if TA2 is not in the TA list configured by the network to the terminal.

In one embodiment, in response to a terminal initiating a TAU, the network configures the terminal with a new TA list to ensure that the network is able to track the terminal.

In the related art, NTN communication, particularly satellite communication, having wide coverage, strong disaster resistance and large capacity characteristics has been rapidly developed.

In one embodiment, the NTN scenes include scenes based on geostationary orbit (GEO, geostationary Earth Orbiting) satellites and scenes based on Non-geostationary orbit (NGSO, non-Geostationary Earth Orbiting) satellites.

Here, compared with the terrestrial network, the NGSO satellite-based NTN network has the characteristic of dynamic change of the terrestrial cell location. This is because the spatial position of NGSO satellites changes dynamically over time, as will the position of the satellite beam based terrestrial cell.

In order to realize the position management of the terminal, a dynamic position management scheme based on TA and a tracking area list is adopted in the 4G and/or 5G network, so that the called terminal can be quickly found when a call or service arrives and needs to find the terminal.

In one embodiment, the TAL is managed by a Mobility management entity in the network responsible for Mobility management functions, e.g. a Mobility management entity (MME, mobility MANAGEMENT ENTITY) in a 4G network or an access and Mobility management function (AMF, ACCESS AND Mobility Management Function) in a 5G network, depending on the location of the terminal and a predetermined network policy.

In one embodiment, for location management, in NTN, when a mobile cell (e.g., a cell of an NGSO satellite) broadcasts a TAI like a terrestrial network cell, even a stationary terminal may perform frequent TAU.

In one embodiment, to reduce frequent TAU execution by the terminal, a TA fixed relative to the ground is employed. As shown in fig. 2, with a TA fixed with respect to the ground, there may be multiple TAs fixed with respect to the ground in one NTN cell at the same time. For example, there are tracking areas TA1 to TA7 in the NTN satellite cell that are fixed relative to the ground.

In one embodiment, the TA fixed relative to the ground may be wholly or partially located in the NTN cell.

As shown in fig. 3, the present embodiment provides a communication method, which is applied to a network side, and includes:

Step 31, according to the auxiliary information of the terminal, issuing the indication information of the TFTA to which the terminal belongs;

auxiliary information, at least including: position information of the terminal and movement status information of the terminal.

In some embodiments, the terminal may be, but is not limited to, a mobile phone, a wearable device, a vehicle-mounted terminal, a Road Side Unit (RSU), a smart home terminal, an industrial sensor device, and the like.

Here, the network in which the terminals communicate is an NTN network.

Here, the cell may be a cell of a satellite in NTN.

In one embodiment, the satellite may be a base station that is in flight.

In one embodiment, the base station may be an access device for a terminal to access the NTN.

In some embodiments, the base station may be various types of base stations.

Such as a base station of a third generation mobile communication (3G) network, a base station of a fourth generation mobile communication (4G) network, a base station of a fifth generation mobile communication (5G) network, or other evolved base station.

In one embodiment, the AMF at the network side determines the indication information of the TFTA to which the terminal belongs according to the auxiliary information of the terminal, and issues the indication information through the base station.

In one embodiment, a cell of a satellite follows the movement of the satellite.

In one embodiment, there is a relative velocity of movement between the terminal and the NTN serving cell.

In one embodiment, the terminal remains stationary relative to the ground and the NTN serving cell moves along a fixed trajectory relative to the ground.

In one embodiment, the terminal moves relative to the ground and the NTN serving cell moves along a fixed trajectory relative to the ground.

In one embodiment, the terminal moves relative to the ground and the NTN serving cell remains stationary relative to the ground.

In one embodiment, the terminal and satellite may be in opposite or same direction of motion.

In one embodiment, the terminal has a positioning function. The terminal can acquire the position information of the terminal.

In one embodiment, the AMF receives the assistance information transmitted by the terminal through the base station.

In one embodiment, the auxiliary information transmitted by the terminal is received periodically.

In one embodiment, the terminal sends the assistance information to the network side in response to the terminal initially accessing the base station.

In one embodiment, the terminal sends the assistance information to the network side in response to the terminal registering.

In one embodiment, the network side receives a registration message carrying auxiliary information sent by the terminal.

In one embodiment, in response to receiving a registration message carrying auxiliary information sent by a terminal, the indication information of a TFTA to which the terminal belongs is issued.

In one embodiment, the location information of the terminal is used to indicate where the terminal is located.

In one embodiment, the location information of the terminal may be location coordinates of the location where the terminal is located.

In one embodiment, the movement status information of the terminal is used to indicate the movement status of the terminal. Here, the movement condition information of the terminal may be information associated with movement of the terminal.

In one embodiment, the movement status information of the terminal includes at least one of:

type information of the terminal, indicating the movement capability of the terminal;

And the motion record information of the terminal indicates at least one of the current motion condition of the terminal and the historical motion condition of the terminal.

In one embodiment, the motion capability of the terminal may be a capability of the terminal to move at a speed greater than a first speed threshold.

For example, the movement speed of the terminal is greater than 10 m/s.

In one embodiment, the terminal is a first type of terminal in response to the capability of the terminal's movement speed being greater than a first speed threshold.

In one embodiment, the motion capability of the terminal may be a capability of the terminal to move at a speed less than a second speed threshold.

For example, the movement speed of the terminal is less than 10 m/s.

In one embodiment, the terminal is a second type of terminal in response to the capability of the terminal's movement speed being less than a second speed threshold.

In one embodiment, the current motion condition of the terminal may be a condition of a speed and/or a direction of the current motion of the terminal.

For example, the current movement speed of the terminal is 10 m/s, and the movement direction of the terminal is the northeast direction.

In one embodiment, the historical motion profile of the terminal may be a profile of the speed and/or direction of movement of the terminal over a historical period of time.

For example, the average movement speed of the terminal in the past 10 minutes is 1 m/s, and the movement direction is southwest.

In one embodiment, the AMF, which may be a network side, predicts the ground area that the terminal will pass through based on a machine learning algorithm model and assistance information.

In one embodiment, the ground area that the terminal is predicted to pass through may be determined as TFTA.

Referring to fig. 4, the amf may determine that the TFTA of UE1 is tfta#1 and determine that the TFTA of UE2 is tfta#2 according to the received assistance information of the terminal. Here, the auxiliary information includes position information, movement speed information, and movement direction information of the terminal.

Referring to fig. 5, it can be predicted that UE1 will pass tfta#1 and tfta#2 according to the motion direction in the side information of terminal UE 1. Here, tfta#1 and tfta#2 are ground areas through which UE1 may pass. Here, the auxiliary information includes position information, movement speed information, and movement direction information of the terminal.

In one embodiment, tfta#1 includes 3 NTN cells; tfta#2 includes 1 NTN cell.

In one embodiment, the AMF determines the TFTA based on the area of the ground that the terminal is predicted to pass.

In one embodiment, for a terminal in an idle state and a terminal in an inactive state, when the network has downlink data to send to the terminal, a paging message is sent to the TA in order for the network to be able to page the terminal. Here, TA is TFTA indicated by the indication information.

In one embodiment, TA is TFTA. Here, the TFTA may be a fixed geographical area.

In one embodiment, each TFTA includes one or more cells.

In one embodiment, each TFTA includes cells that vary in time in the NTN.

For example, at time a, the satellite is operating in the a-position, TFTA includes cell 1 and cell 2; at time B, the satellite is operating in B-position and TFTA includes cell 3 and cell 4.

Referring to fig. 6, at time a, satellite motion is above tfta#1, tfta#1 including NTN cell 1, NTN cell 2, and NTN cell 3.

In one embodiment, NTN cell 1, NTN cell 2, and NTN cell 3 would broadcast TAI to tfta#1. Here, the TAIs broadcast by NTN cell 1, NTN cell 2, and NTN cell 3 are tai#1, tai#2, and tai#3, respectively.

In one embodiment, the satellite moves in a predetermined orbit based on a predetermined velocity, and the network side and/or the terminal may determine the NTN cell included in the TFTA at any time according to the predetermined orbit and the predetermined velocity.

In one embodiment, the TFTA may be determined based on an area that the terminal may pass through, which is determined based on the assistance information.

For example, according to the current movement speed and direction of the terminal and the position of the terminal, it is determined that the terminal will pass through the area a and the area B in the following time, and then it may be determined that the TFTA is the area a and the area B.

In one embodiment, the ground is divided into a plurality of areas. Wherein the TFTA is one or more of the plurality of regions.

In one embodiment, the terminal needs to make a TAU in response to the terminal moving out of the TFTA.

In one embodiment, the network configures the terminal with a list of TAs. The TA list includes a plurality of TFTAs.

In one embodiment, the TA list may be indicated by indication information.

In one embodiment, when the terminal moves from TFTA1 (terrestrial fixed tracking area 1) to TFTA2 (terrestrial fixed tracking area 2), the terminal needs to initiate a TAU if TFTA2 is not in the TA list configured by the network to the terminal.

In one embodiment, in response to initiating a TAU, the network configures the terminal with a new TA list. To ensure that the network is able to track to the terminal.

In the embodiment of the disclosure, according to auxiliary information of a terminal, indication information of a TFTA to which the terminal belongs is issued; auxiliary information, at least including: position information of the terminal and movement status information of the terminal. Here, since the indication information is determined according to the assistance information of the terminal, the TFTA to which the terminal belongs can be adapted to the location of the terminal and the movement condition of the terminal. In the wireless communication in NTN, on the one hand, frequent TAU by the terminal due to the fixed TFTA is reduced compared with the manner of setting the fixed TFTA to the terminal; on the other hand, the TFTA can adapt to the position and the movement condition of the terminal, and the efficiency of accurately paging the terminal can be improved.

It should be noted that, as those skilled in the art may understand, the methods provided in the embodiments of the present disclosure may be performed alone or together with some methods in the embodiments of the present disclosure or some methods in the related art.

As shown in fig. 7, the present embodiment provides a communication method, which is applied to a network side, and includes:

Step 71, sending a paging message to the NTN cell in the TFTA indicated by the indication information in response to the need of sending downlink data to the terminal in the non-connected state.

In one embodiment, the unconnected state includes an idle state and an inactive state.

In one embodiment, in response to the core network having data to send to a terminal in a non-connected state, a paging message is sent to page the terminal in an NTN cell within the TFTA indicated by the indication information.

In one embodiment, each TFTA includes one or more NTN cells.

In one embodiment, a core network sends paging messages to a plurality of NTN cells.

In one embodiment, each TFTA includes cells that vary in time in the NTN.

In one embodiment, in response to the need to send downlink data, the core network sends a paging message to the NTN cell included in the TFTA at the current point in time.

For example, at time a, the satellite is operating in the a-position, TFTA includes cell 1 and cell 2; at time B, the satellite is operating in B-position and TFTA includes cell 3 and cell 4. Then at time B the core network will send paging messages to cell 3 and cell 4 to page the terminal in response to the need to send downlink data.

As shown in fig. 8, the present embodiment provides a communication method, which is applied to a network side, and includes:

Step 81, determining one or more NTN cells in the TFTA indicated by the indication information according to at least the time information, the ephemeris information and the cell signal coverage area information.

In one embodiment, the ephemeris information includes at least one of the following: the movement track information of the satellite, the position information of the satellite, the movement speed information of the satellite and the orbit height information of the satellite.

In one embodiment, the cell signal coverage area information may be area information of signal coverage of satellites at different times.

For example, the cell signal coverage area information may be area information of beam coverage of satellites at different times.

In one embodiment, NTN cells within TFTA at any instant in time may be determined based on ephemeris information and cell signal coverage area information.

In one embodiment, NTN cells within a TFTA are determined based on a mapping relationship between time information, ephemeris information, cell signal coverage area information, and the TFTA.

In one embodiment, the network side updates the mapping relationship in real time.

For example, the mapping relationship may be updated periodically.

In one embodiment, the period of updating the mapping may be determined based on the velocity of the satellite relative to the ground.

In one embodiment, the period is less than the period threshold in response to the operational speed of the satellite relative to the ground being greater than or equal to the speed threshold.

In one embodiment, the period is greater than the period threshold in response to the operational speed of the satellite relative to the ground being less than or equal to the speed threshold.

In this way, the updating of the mapping relationship can be adapted to the operating speed of the satellite relative to the ground.

In one embodiment, in response to the need to send downlink data, a paging message for the paging terminal may be sent to the NTN cell of the TFTA determined according to the current time and mapping relationship.

As shown in fig. 9, the present embodiment provides a communication method, which is applied to a network side, and includes:

step 91, receiving a registration request carrying auxiliary information.

In this way, the auxiliary information is carried in the registration request, so that the signaling compatibility of the registration request signaling can be improved.

In one embodiment, a registration request is sent to a network side in response to a terminal making a TAU.

In one embodiment, the registration request carries location information of the terminal and movement status information of the terminal.

As shown in fig. 10, the present embodiment provides a communication method, which is applied to a network side, and includes:

Step 101, a registration acceptance message carrying indication information of the TFTA is issued according to the registration request.

In this way, the indication information of the TFTA is carried in the registration receiving message and sent, so that the signaling compatibility of the registration receiving message can be improved.

In one embodiment, in response to a network side receiving a registration request, a registration receiving message carrying indication information of a TFTA is issued according to the registration request.

In this way, the terminal can timely receive the indication information of the TFTA.

As shown in fig. 11, the present embodiment provides a communication method, which is applied to a terminal, and includes:

Step 111, receiving indication information of a TFTA to which the terminal belongs; wherein, the TFTA is determined according to the auxiliary information of the terminal; auxiliary information, at least including: position information of the terminal and motion state information of the terminal;

Step 112, performing TAU according to the instruction information.

In some embodiments, the terminal may be, but is not limited to, a mobile phone, a wearable device, a vehicle-mounted terminal, a road side unit, a smart home terminal, an industrial sensor device, and the like.

Here, the network in which the terminals communicate is an NTN network.

Here, the cell may be a cell of a satellite in NTN.

In one embodiment, the satellite may be a base station that is in flight.

In some embodiments, the base station may be various types of base stations.

In one embodiment, a cell of a satellite follows the movement of the satellite.

In one embodiment, the terminal sends the assistance information to the network side.

In one embodiment, the terminal periodically transmits the assistance information to the network side.

In one embodiment, the auxiliary information is sent to the network side in response to the terminal initially accessing the base station.

In one embodiment, the assistance information is sent to the network side in response to the terminal registration.

In one embodiment, a registration message carrying assistance information is sent to the network side.

In one embodiment, the network side responds to receiving a registration message carrying auxiliary information sent by the terminal, and issues indication information of a TFTA to which the terminal belongs.

For example, the movement speed of the terminal is greater than 10 m/s.

For example, the movement speed of the terminal is less than 10 m/s.

Referring to fig. 4 again, the amf may determine that the TFTA of UE1 is tfta#1 and determine that the TFTA of UE2 is tfta#2 according to the received assistance information of the terminal. Here, the auxiliary information includes position information, movement speed information, and movement direction information of the terminal.

Referring to fig. 5 again, it can be predicted that UE1 will pass tfta#1 and tfta#2 according to the motion direction in the side information of terminal UE 1. Here, tfta#1 and tfta#2 are ground areas through which UE1 may pass. Here, the auxiliary information includes position information, movement speed information, and movement direction information of the terminal.

In one embodiment, tfta#1 includes 3 NTN cells; tfta#2 includes 1 NTN cell.

In one embodiment, the TFTA may be a fixed geographic area.

In one embodiment, each TFTA includes one or more cells.

In one embodiment, each TFTA includes cells that vary in time in the NTN.

In one embodiment, the ground is divided into a plurality of areas.

In one embodiment, the TFTA is one or more of a plurality of regions.

In one embodiment, the network configures the terminal with a list of TAs.

In one embodiment, the TA list includes a plurality of TFTAs.

In one embodiment, the TA list may be indicated by indication information.

As shown in fig. 12, the present embodiment provides a communication method, which is applied to a terminal, and includes:

step 121, reporting a registration request carrying auxiliary information.

As shown in fig. 13, the present embodiment provides a communication method, which is applied to a terminal, and includes:

Step 131, receiving a registration acceptance message carrying indication information of the TFTA according to the registration request.

As shown in fig. 14, the present embodiment provides a communication method, which is applied to a terminal, and includes:

and 141, responding to the terminal being out of the TFTA indicated by the indication information, and performing TAU.

In an embodiment, the terminal is located outside the TFTA indicated by the indication information, and may be the TFTA indicated by the indication information.

In one embodiment, when the terminal moves from TFTA1 (tracking area 1) to TFTA2 (tracking area 2), then the terminal needs to initiate a TAU.

In one embodiment, in response to initiating the TAU, the network configures the terminal with a new TFTA based on the assistance information to ensure that the network is able to track to the terminal.

As shown in fig. 15, the present embodiment provides a communication method, which is applied to a terminal, and includes:

Step 151, determining one or more NTN cells in the TFTA indicated by the indication information according to at least the time information, the ephemeris information and the cell signal coverage area information.

In one embodiment, the terminal updates the mapping relation in real time.

For example, the mapping relationship may be updated periodically.

In one embodiment, in response to the need to send downlink data, the network side may send a paging message of the paging terminal to the NTN cell of the TFTA determined according to the current time and the mapping relationship.

As shown in fig. 16, the present embodiment provides a communication method, which is applied to a terminal, and includes:

step 161, in response to detecting the first tracking area identifier TAI, determining that the terminal is within the TFTA indicated by the indication information; wherein the first TAI is a TAI of any NTN cell of the one or more NTN cells;

Or alternatively

In response to detecting the second TAI, determining that the terminal is out of the TFTA indicated by the indication information; wherein the second TAI is different from a TAI of any of the one or more NTN cells.

In one embodiment, the network side may broadcast the TAI to the NTN cell.

In one embodiment, each TFTA includes NTN cells in NTN that vary according to time.

In one embodiment, the terminal updates the mapping relation in real time.

The mapping relationship may be updated periodically.

In one embodiment, the terminal may determine, according to the mapping relationship, NTN cells included in the TFTA at each time instant.

In one embodiment, it may be determined that the terminal is within the TFTA indicated by the indication information in response to detecting the TAI of the NTN cell contained at the current time within the TFTA indicated by the indication information.

In one embodiment, the TAI of the NTN cell is periodically detected according to the mapping relationship. Here, the TAI of the NTN cell may or may not be the TAI of the NTN cell in the TFTA indicated by the indication information.

In this way, it can be determined in real time whether the terminal is located in the TFTA indicated by the indication information.

In one embodiment, it may be determined that the terminal is outside the TFTA indicated by the indication information in response to detecting the second TAI.

In one embodiment, in response to the terminal being outside the TFTA indicated by the indication information, the network side cannot page the terminal in the TFTA, and the terminal needs to perform TAU.

Referring to fig. 17, at time a, tfta#1 includes NTN cell 1, NTN cell 2, and NTN cell 3.NTN cell 1, NTN cell 2, and NTN cell 3 broadcast TAI to tfta#1, respectively. The TAIs broadcast to tfta#1 by NTN cell 1, NTN cell 2, and NTN cell 3 are tai#1, tai#2, and tai#3, respectively.

As shown in fig. 18, in this embodiment, a communication method is provided, where the method is applied to a terminal, and includes:

Step 181, determining that the terminal is out of the TFTA indicated by the indication information in response to the fact that the duration of the terminal in the TFTA is greater than or equal to the predicted duration;

the prediction duration is determined according to auxiliary information of the terminal.

And the motion record information of the terminal indicates the current motion condition of the terminal and/or the historical motion condition of the terminal.

In one embodiment, the terminal may determine the predicted duration based on the assistance information and the neural network model.

In one embodiment, in response to a predicted time period after determining the predicted time period, the terminal is within a TFTA indicated by the indication information; and responding to the fact that the terminal is out of the TFTA indicated by the indication information after the predicted time is determined.

For a better understanding of the disclosed embodiments, a communication method is described by way of an exemplary embodiment.

Example 1: referring to fig. 19, a wireless communication system includes: terminal, base station and AMF.

Example 1 provides a communication method, comprising:

step1, a terminal reports a registration request carrying auxiliary information to an AMF through a base station.

Wherein, the auxiliary information at least comprises: position information of the terminal and movement status information of the terminal.

And 2, according to the auxiliary information of the terminal, the AMF transmits the indication information of the TFTA to which the terminal belongs through the base station.

And 3, the terminal enters a non-connection state.

And 4, in response to the need of sending downlink data to the terminal in the non-connection state, the AMF sends a paging message in a non-terrestrial network NTN cell in the TFTA indicated by the indication information.

And 5, when the terminal moves out of the TFTA, the terminal performs TAU. Here, the terminal may perform TAU by sending a registration request carrying auxiliary information to the network side.

As shown in fig. 20, in an embodiment of the present disclosure, a communication apparatus is provided, where the apparatus is applied to a network side, and includes a first sending module 201, where the first sending module 201 is configured to:

according to the auxiliary information of the terminal, the indication information of the TFTA to which the terminal belongs is issued;

In one embodiment, the first sending module 201 is further configured to: motion status information of the terminal including at least one of:

In one embodiment, the first sending module 201 is further configured to:

and sending a paging message to a non-terrestrial network NTN cell in the TFTA indicated by the indication information in response to the need of sending downlink data to the terminal in the non-connection state.

In one embodiment, the apparatus further comprises a first determination module 202, wherein the first determination module 202 is configured to:

One or more NTN cells within the TFTA indicated by the indication information are determined based at least on the time information, the ephemeris information, and the cell signal coverage area information.

In an embodiment, the apparatus further comprises a first receiving module 203, wherein the first receiving module 203 is configured to receive a registration request carrying the assistance information.

In one embodiment, the first sending module 201 is further configured to:

and issuing a registration acceptance message carrying the indication information of the TFTA according to the registration request.

As shown in fig. 21, in an embodiment of the present disclosure, a communication apparatus is provided, where the communication apparatus is applied to a terminal, and the apparatus includes a second receiving module 211 and an updating module 212, where,

The second receiving module 211 is configured to: receiving indication information of TFTA to which a terminal belongs; wherein, the TFTA is determined according to the auxiliary information of the terminal; auxiliary information, at least including: position information of the terminal and motion state information of the terminal;

an update module 212 configured to: and carrying out TAU according to the instruction information.

In one embodiment, the second receiving module 211 is further configured to: motion status information of the terminal including at least one of:

In one embodiment, the apparatus further includes a second sending module 213, where the second sending module 213 is configured to report a registration request carrying the auxiliary information.

In one embodiment, the second receiving module 211 is further configured to:

And receiving a registration acceptance message carrying the indication information of the TFTA, which is issued according to the registration request.

In one embodiment, the update module 212 is further configured to:

and responding to the terminal being out of the TFTA indicated by the indication information, and performing TAU.

In one embodiment, the apparatus further comprises a second determination module 214, wherein the second determination module 214 is further configured to:

In one embodiment, the second determination module 214 is further configured to:

In response to detecting the first tracking area identifier TAI, determining that the terminal is in the TFTA indicated by the indication information; wherein the first TAI is a TAI of any NTN cell of the one or more NTN cells;

Or alternatively

In one embodiment, the apparatus further comprises a third determination module 215, wherein the third determination module 215 is configured to:

determining that the terminal is out of the TFTA indicated by the indication information in response to the fact that the duration of the terminal in the TFTA is greater than or equal to the predicted duration;

The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.

The embodiment of the disclosure provides a communication device, which comprises:

A processor;

A memory for storing processor-executable instructions;

wherein the processor is configured to: for executing executable instructions, implements a method that is applicable to any of the embodiments of the present disclosure.

The processor may include, among other things, various types of storage media, which are non-transitory computer storage media capable of continuing to memorize information stored thereon after a power down of the communication device.

The processor may be coupled to the memory via a bus or the like for reading the executable program stored on the memory.

The embodiments of the present disclosure also provide a computer storage medium, where the computer storage medium stores a computer executable program that when executed by a processor implements the method of any embodiment of the present disclosure.

As shown in fig. 22, one embodiment of the present disclosure provides a structure of a terminal.

Referring to terminal 800 shown in fig. 22, an embodiment of the present disclosure provides a terminal 800, which terminal 800 may be embodied as a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, or the like.

Referring to fig. 22, the terminal 800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and a communication component 816.

The processing component 802 generally controls overall operation of the terminal 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interactions between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operations at the terminal 800. Examples of such data include instructions for any application or method operating on the terminal 800, contact data, phonebook data, messages, pictures, videos, and the like. The memory 804 may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.

The power supply component 806 provides power to the various components of the terminal 800. The power components 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the terminal 800.

The multimedia component 808 includes a screen between the terminal 800 and the user that provides an output interface. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or sliding action, but also the duration and pressure associated with the touch or sliding operation. In some embodiments, the multimedia component 808 includes a front camera and/or a rear camera. The front camera and/or the rear camera may receive external multimedia data when the terminal 800 is in an operation mode, such as a photographing mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the terminal 800 is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 further includes a speaker for outputting audio signals.

The I/O interface 812 provides an interface between the processing component 802 and peripheral interface modules, which may be a keyboard, click wheel, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.

The sensor assembly 814 includes one or more sensors for providing status assessment of various aspects of the terminal 800. For example, the sensor assembly 814 may detect an on/off state of the terminal 800, a relative positioning of the assemblies, such as a display and keypad of the terminal 800, the sensor assembly 814 may also detect a change in position of the terminal 800 or one of the assemblies of the terminal 800, the presence or absence of user contact with the terminal 800, an orientation or acceleration/deceleration of the terminal 800, and a change in temperature of the terminal 800. The sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 816 is configured to facilitate communication between the terminal 800 and other devices, either wired or wireless. The terminal 800 may access a wireless network based on a communication standard, such as Wi-Fi,2G, or 3G, or a combination thereof. In one exemplary embodiment, the communication component 816 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component 816 further includes a Near Field Communication (NFC) module to facilitate short range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the terminal 800 can be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic elements for executing the methods described above.

In an exemplary embodiment, a non-transitory computer readable storage medium is also provided, such as memory 804 including instructions executable by processor 820 of terminal 800 to perform the above-described method. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

As shown in fig. 23, an embodiment of the present disclosure shows a structure of a base station. For example, base station 900 may be provided as a network-side device. Referring to fig. 23, base station 900 includes a processing component 922 that further includes one or more processors and memory resources represented by memory 932 for storing instructions, such as applications, executable by processing component 922. The application programs stored in memory 932 may include one or more modules that each correspond to a set of instructions. Further, processing component 922 is configured to execute instructions to perform any of the methods described above as applied at the base station.

Base station 900 may also include a power component 926 configured to perform power management for base station 900, a wired or wireless network interface 950 configured to connect base station 900 to a network, and an input output (I/O) interface 958. The base station 900 may operate based on an operating system stored in memory 932, such as Windows Server TM, mac OS XTM, unixTM, linuxTM, freeBSDTM, or the like.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It is to be understood that the invention is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims

1. A communication method, applied to a network side, the method comprising:

Determining a ground fixed tracking area TFTA to which a position of a terminal at a subsequent time belongs according to auxiliary information of the terminal;

Determining a non-terrestrial network NTN cell in a TFTA according to the mapping relation among time information, ephemeris information, cell signal coverage area information and the TFTA;

periodically updating the mapping relation; the period for updating the mapping relation is determined according to the movement speed of the satellite relative to the ground;

Issuing indication information of a ground fixed tracking area TFTA to which the terminal belongs;

The auxiliary information at least comprises: the position information of the terminal and the movement condition information of the terminal; the movement condition information of the terminal comprises type information of the terminal, and the type information of the terminal is used for indicating movement capability of the terminal.

2. The method of claim 1, wherein the motion condition information of the terminal comprises at least one of:

3. The method of claim 1, wherein the method further comprises:

4. A method according to claim 3, wherein the method further comprises:

And determining one or more NTN cells in the TFTA indicated by the indication information according to at least the time information, the ephemeris information and the cell signal coverage area information.

5. The method of claim 1, wherein the method further comprises:

and receiving a registration request carrying the auxiliary information.

6. The method of claim 5, wherein the method further comprises:

7. A communication method, wherein the method is applied to a terminal, the method comprising:

Receiving indication information of TFTA to which a terminal belongs; the non-ground network NTN cell in the TFTA is determined according to the mapping relation between time information, ephemeris information, cell signal coverage area information and the TFTA, the mapping relation is updated periodically, and the period for updating the mapping relation is determined according to the movement speed of the satellite relative to the ground; the ground fixed tracking area TFTA of the terminal at the position of the subsequent time is determined according to the auxiliary information of the terminal; the auxiliary information at least comprises: the position information of the terminal and the movement condition information of the terminal; the motion condition information of the terminal comprises type information of the terminal, wherein the type information of the terminal is used for indicating the motion capability of the terminal;

And updating the TAU according to the indication information.

8. The method of claim 7, wherein the motion condition information of the terminal comprises at least one of:

9. The method of claim 7, wherein the method further comprises:

and reporting a registration request carrying the auxiliary information.

10. The method of claim 9, wherein the receiving the indication information of the TFTA comprises:

And receiving a registration acceptance message which is issued according to the registration request and carries the indication information of the TFTA.

11. The method of claim 7, wherein the performing TAU according to the indication information further comprises:

12. The method of claim 11, wherein the method further comprises:

13. The method of claim 12, wherein the method further comprises:

in response to detecting a first Tracking Area Identity (TAI), determining that the terminal is in a TFTA indicated by the indication information; wherein the first TAI is a TAI of any NTN cell of the one or more NTN cells;

Or alternatively

In response to detecting the second TAI, determining that the terminal is outside the TFTA indicated by the indication information; wherein the second TAI is different from a TAI of any of the one or more NTN cells.

14. The method of claim 11, wherein the method further comprises:

wherein the predicted duration is determined from the assistance information of the terminal.

15. A communication device, wherein the device is applied to a network side, the device comprising a first transmission module, wherein the first transmission module is configured to:

determining a ground fixed tracking area TFTA to which a position of a terminal at a subsequent time belongs according to auxiliary information of the terminal; issuing indication information of the TFTA to which the terminal belongs; determining a non-terrestrial network NTN cell in a TFTA according to the mapping relation among time information, ephemeris information, cell signal coverage area information and the TFTA; periodically updating the mapping relation; the period for updating the mapping relation is determined according to the movement speed of the satellite relative to the ground;

16. The apparatus of claim 15, wherein the first transmission module is further configured to: the motion condition information of the terminal comprises at least one of the following:

17. The apparatus of claim 15, wherein the first transmission module is further configured to:

18. The apparatus of claim 17, wherein the apparatus further comprises a first determination module, wherein the first determination module is configured to:

19. The apparatus of claim 15, wherein the apparatus further comprises a first receiving module, wherein the first receiving module is configured to receive a registration request carrying the assistance information.

20. The apparatus of claim 19, wherein the first transmission module is further configured to:

21. A communication device, wherein the device is applied to a terminal, comprises a second receiving module and an updating module, wherein,

The second receiving module is configured to: receiving indication information of TFTA to which a terminal belongs; the non-ground network NTN cell in the TFTA is determined according to the mapping relation between time information, ephemeris information, cell signal coverage area information and the TFTA, the mapping relation is updated periodically, and the period for updating the mapping relation is determined according to the movement speed of the satellite relative to the ground;

The ground fixed tracking area TFTA of the terminal at the position of the subsequent time is determined according to the auxiliary information of the terminal; the auxiliary information at least comprises: the position information of the terminal and the movement condition information of the terminal; the motion condition information of the terminal comprises type information of the terminal, wherein the type information of the terminal is used for indicating the motion capability of the terminal;

22. The apparatus of claim 21, wherein the second receiving module is further configured to: the motion condition information of the terminal comprises at least one of the following:

23. The apparatus of claim 21, wherein the apparatus further comprises a second sending module, wherein the second sending module is configured to report a registration request carrying the assistance information.

24. The apparatus of claim 23, wherein the second receiving module is further configured to:

25. The apparatus of claim 21, wherein the update module is further configured to:

26. The apparatus of claim 25, wherein the apparatus further comprises a second determination module, wherein the second determination module is further configured to:

27. The apparatus of claim 26, wherein the second determination module is further configured to:

In response to detecting a first Tracking Area Identity (TAI), determining that the terminal is in a TFTA indicated by the indication information; wherein the first TAI is a TAI of any NTN cell of the one or more NTN cells; or alternatively

28. The apparatus of claim 25, wherein the apparatus further comprises a third determination module, wherein the third determination module is configured to:

29. A communication device, comprising:

An antenna;

A memory;

A processor, coupled to the antenna and the memory, respectively, configured to control the transceiving of the antenna by executing computer-executable instructions stored on the memory, and to enable the method provided in any one of claims 1 to 6 or 7 to 14.

30. A computer storage medium storing computer executable instructions which, when executed by a processor, enable the method provided in any one of claims 1 to 6 or 7 to 14 to be carried out.