Communication methods, devices, system, and storage medium

Abstract

Embodiments of the present disclosure disclose communication methods, an apparatus, and a computer-readable storage medium, and relate to the technical field of communications. A communication method comprises: receiving first information, the first information comprising a first threshold related to the mobility state of a terminal and frequency point priority levels corresponding to different mobility states of the terminal; and, on the basis of the first information, performing cell reselection. On the basis of the first information comprising the first threshold related to the mobility state of the terminal and / or the frequency point priority levels corresponding to different mobility states of the terminal, the embodiments of the present disclosure performing cell reselection can effectively solve the problem of high power consumption of the terminal caused by frequent cell reselection.

Description

Communication methods, devices, systems and storage media Technical Field

[0001] This disclosure relates to the field of communication technology, and more specifically, to a communication method, device, system, and storage medium. Background Technology

[0002] Terrestrial networks (TN) rely on terrestrial base stations to provide wireless coverage and enable wireless signal transmission between the communication network and user terminals. Non-terrestrial networks (NTN) utilize non-terrestrial communication infrastructure such as satellites to achieve global communication coverage, offering advantages such as large coverage area and long communication distance. Summary of the Invention

[0003] This disclosure provides a communication method, device, system, and storage medium.

[0004] A first aspect of this disclosure provides a communication method, the method comprising:

[0005] Receive first information, the first information including: a first threshold related to the mobility state of the terminal, and / or, frequency point priority corresponding to different mobility states of the terminal;

[0006] Based on the first information, cell reselection is performed.

[0007] A second aspect of this disclosure provides a communication method, the method comprising:

[0008] Send first information to the terminal, the first information being used for cell reselection;

[0009] The first information includes: a first threshold related to the mobile state of the terminal, and / or the frequency priority corresponding to different mobile states of the terminal.

[0010] A third aspect of this disclosure provides a terminal, including:

[0011] The first transceiver module is used to receive first information, the first information including: a first threshold related to the mobility state of the terminal, and / or, frequency point priority corresponding to different mobility states of the terminal;

[0012] The first processing module is used to perform cell reselection based on the first information.

[0013] A fourth aspect of this disclosure provides a network device, including:

[0014] The second transceiver module is used to send first information to the terminal, the first information being used for cell reselection.

[0015] The first information includes: a first threshold related to the mobile state of the terminal, and / or the frequency priority corresponding to different mobile states of the terminal.

[0016] A fifth aspect of this disclosure provides a terminal, including:

[0017] One or more processors;

[0018] The terminal is used to execute the optional implementation of the first aspect described above.

[0019] A sixth aspect of this disclosure provides a network device, including:

[0020] One or more processors;

[0021] The network device is used to perform an optional implementation of the second aspect described above.

[0022] A seventh aspect of this disclosure provides a communication system including a terminal and a network device, wherein the terminal is used to implement the method described in the optional embodiments of the first aspect, and the network device is used to implement the method described in the optional embodiments of the second aspect.

[0023] According to an eighth aspect of the present disclosure, a computer-readable storage medium is provided that stores executable instructions which are loaded and executed by the processor to implement the method described in the optional embodiments of the first or second aspect.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0026] Figure 1 is a schematic diagram of a wireless communication system according to an exemplary embodiment;

[0027] Figure 2 is a flowchart illustrating a communication method according to an exemplary embodiment;

[0028] Figure 3a is a flowchart illustrating the communication method according to an embodiment of this disclosure;

[0029] Figure 3b is a flowchart illustrating the communication method according to an embodiment of this disclosure;

[0030] Figure 4 is a flowchart illustrating the communication method according to an embodiment of this disclosure;

[0031] Figure 5a is a flowchart illustrating the communication method according to an embodiment of this disclosure;

[0032] Figure 5b is a schematic diagram of cell reselection in a communication method according to an embodiment of this disclosure;

[0033] Figure 6a is a schematic diagram of the structure of the terminal proposed in an embodiment of this disclosure;

[0034] Figure 6b is a schematic diagram of the structure of the network device proposed in an embodiment of this disclosure;

[0035] Figure 7a is a schematic diagram of the structure of the communication device proposed in an embodiment of this disclosure;

[0036] Figure 7b is a schematic diagram of the chip structure proposed in an embodiment of this disclosure. Detailed Implementation

[0037] This disclosure provides communication methods, devices, communication systems, and storage media.

[0038] In a first aspect, embodiments of this disclosure provide a communication method performed by a terminal, the method comprising:

[0039] Receive first information, the first information including: a first threshold related to the mobility state of the terminal, and / or, frequency point priority corresponding to different mobility states of the terminal;

[0040] Based on the first information, cell reselection is performed.

[0041] In the above embodiments, by performing cell reselection based on a first threshold related to the terminal's mobility state and / or the frequency point priority corresponding to different mobility states of the terminal as first information, the problem of high terminal power consumption caused by frequent cell reselection can be effectively solved.

[0042] In conjunction with some embodiments of the first aspect, in some embodiments, the step of performing cell reselection based on the first information includes:

[0043] Based on the first threshold, it is determined that the terminal is in a first moving state;

[0044] Cell reselection is performed based on the priority of the NTN frequency determined by the first mobility state.

[0045] In the above embodiments, cell reselection is performed based on the priority of NTN frequency. This can take advantage of the wide coverage and minimal near-far effect of NTN cells, greatly reducing the number of cell reselections and avoiding the power consumption caused by multiple measurements.

[0046] In conjunction with some embodiments of the first aspect, in some embodiments, the step of performing cell reselection based on the first information includes:

[0047] Based on the first threshold, it is determined that the terminal is in a first moving state;

[0048] Cell reselection is performed based on the priority of NTN frequencies as specified in the protocol.

[0049] In the above embodiments, cell reselection is performed based on the priority of NTN frequency. This can take advantage of the wide coverage and minimal near-far effect of NTN cells, greatly reducing the number of cell reselections and avoiding the power consumption caused by multiple measurements.

[0050] In conjunction with some embodiments of the first aspect, in some embodiments, the first moving state is a high-speed moving state, and the NTN frequency is of high priority.

[0051] In the above embodiments, when the terminal is in a high-speed moving state, cell reselection is preferentially performed based on NTN cells, which can reduce the number of cell reselections and avoid the power consumption caused by multiple measurements.

[0052] In conjunction with some embodiments of the first aspect, in some embodiments, the cell reselection includes:

[0053] Based on the NTN frequency, a first cell is determined, which includes: a fixed earth cell or a quasi-fixed earth cell;

[0054] Cell reselection is performed based on the second cell in the first cell whose remaining service time meets the first condition.

[0055] In the above embodiments, when the terminal is in a high-speed moving state, cell reselection based on fixed Earth cells or quasi-fixed Earth cells can make full use of the characteristic that the satellite beam is fixed in the ground position for a period of time.

[0056] In conjunction with some embodiments of the first aspect, in some embodiments, the cell reselection based on a second cell in the first cell whose remaining service time meets the first condition includes:

[0057] The target cell is determined from the second cell according to the R criterion, and the cell is reselected to the target cell; or...

[0058] Select the cell with the longest remaining service time from the second cell as the target cell, and reselect to the target cell.

[0059] In the above embodiments, by comprehensively considering factors such as the service duration and distance of the satellite cell and the UE's motion state, the cell is reselected to the NTN cell more reasonably, which greatly reduces the number of cell reselections and reduces the power consumption generated by multiple measurements.

[0060] In conjunction with some embodiments of the first aspect, in some embodiments, selecting the cell with the longest remaining service time from the second cell as the target cell includes:

[0061] The cells in the second cell that meet the second condition are designated as the third cell;

[0062] The cell with the longest remaining service time in the third cell is identified as the target cell;

[0063] The second condition includes:

[0064] The terminal is located within the first area; or,

[0065] The terminal is located outside the first area, and the distance between the terminal and the reference point of the cell decreases.

[0066] The first region is determined based on the terminal's speed information, the cell's coverage information, and the remaining service time.

[0067] In the above embodiments, by comprehensively considering factors such as the service duration and distance of the satellite cell and the UE's motion state, the cell is reselected to the NTN cell more reasonably, which greatly reduces the number of cell reselections and reduces the power consumption generated by multiple measurements.

[0068] In conjunction with some embodiments of the first aspect, in some embodiments, the distance between the terminal and the reference point of the cell is less than the coverage radius of the first area, then the terminal is located within the first area.

[0069] In the above embodiments, by comprehensively considering factors such as the service duration and distance of the satellite cell and the UE's motion state, the cell is reselected to the NTN cell more reasonably, which greatly reduces the number of cell reselections and reduces the power consumption generated by multiple measurements.

[0070] In conjunction with some embodiments of the first aspect, in some embodiments, the first condition includes: the remaining service duration of the cell is greater than a second threshold related to the service duration.

[0071] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0072] Obtain the remaining service time for each cell in the first cell.

[0073] In the above embodiments, by taking into account the remaining service time of the satellite cell when performing cell reselection, the cell can be reselected to the NTN cell more reasonably, which greatly reduces the number of cell reselections and reduces the power consumption generated by multiple measurements.

[0074] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0075] The reselection parameters of the target cell are scaled.

[0076] In the above embodiments, the reselection parameters of the reselected target cell are scaled to better adapt to the mobile state of the terminal.

[0077] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0078] Obtain at least one of the following:

[0079] The direction of movement of the terminal;

[0080] The geographical location information of the terminal;

[0081] Coverage information for each cell in the second cell;

[0082] Reference points for each cell in the second cell.

[0083] In the above embodiments, by obtaining at least one of the terminal's movement direction, geographical location, and the coverage area and reference point of the NTN cell, this information can be comprehensively considered when performing cell reselection, thereby more reasonably reselecting to the NTN cell, greatly reducing the number of cell reselections and reducing the power consumption generated by multiple measurements.

[0084] Secondly, embodiments of this disclosure provide a communication method performed by a network device, the method comprising:

[0085] Send first information to the terminal, the first information being used for cell reselection;

[0086] The first information includes: a first threshold related to the mobile state of the terminal, and / or the frequency priority corresponding to different mobile states of the terminal.

[0087] In conjunction with some embodiments of the second aspect, in some embodiments, the first threshold is used by the terminal to determine the first mobility state of the terminal, and the cell reselection is performed by the terminal based on the priority of the NTN frequency determined by the first mobility state, or the cell reselection is performed by the terminal based on the priority of the NTN frequency specified in the protocol.

[0088] In conjunction with some embodiments of the second aspect, in some embodiments, the first moving state is a high-speed moving state, and the NTN frequency is of high priority.

[0089] In conjunction with some embodiments of the second aspect, in some embodiments, the cell reselection is performed by the terminal on the second cell among the first cells determined according to the NTN frequency, wherein the remaining service duration meets the first condition, and the first cell includes: a fixed earth cell or a quasi-fixed earth cell.

[0090] In conjunction with some embodiments of the second aspect, in some embodiments, the first condition includes: the remaining service duration of the cell is greater than a second threshold related to the service duration.

[0091] Thirdly, embodiments of this disclosure provide a terminal, including:

[0092] The first transceiver module is used to receive first information, the first information including: a first threshold related to the mobility state of the terminal, and / or, frequency point priority corresponding to different mobility states of the terminal;

[0093] The first processing module is used to perform cell reselection based on the first information.

[0094] Fourthly, embodiments of this disclosure provide a network device, including:

[0095] The second transceiver module is used to send first information to the terminal, the first information being used for cell reselection.

[0096] The first information includes: a first threshold related to the mobile state of the terminal, and / or the frequency priority corresponding to different mobile states of the terminal.

[0097] Fifthly, embodiments of this disclosure provide a terminal, including:

[0098] One or more processors;

[0099] The terminal executes the method described in the optional implementation of the first aspect.

[0100] According to a sixth aspect of the embodiments of this disclosure, a network device is provided, comprising:

[0101] One or more processors;

[0102] The network device performs the method described in the optional implementation of the second aspect.

[0103] In a seventh aspect, embodiments of this disclosure provide a communication system including a terminal and a network device, wherein the terminal is used to implement the method described in the optional implementation of the first aspect, and the network device is used to implement the method described in the optional implementation of the second aspect.

[0104] Eighthly, embodiments of this disclosure provide a storage medium storing instructions that, when executed on a communication device, cause the communication device to perform the method as described in the optional embodiments of the first or second aspect.

[0105] Ninthly, embodiments of this disclosure provide a program product that, when executed by a communication device, causes the communication device to perform the method as described in the optional implementation of the first or second aspect.

[0106] In a tenth aspect, embodiments of this disclosure provide a computer program that, when run on a computer, causes the computer to perform the methods described in an optional implementation of the first or second aspect.

[0107] Eleventhly, embodiments of this disclosure provide a chip or chip system including processing circuitry for performing the method described in an optional implementation of the first or second aspect above.

[0108] Understandably, the aforementioned devices, communication equipment, communication systems, storage media, program products, and computer programs for random access are all used to execute the methods proposed in the embodiments of this disclosure. Therefore, the beneficial effects they can achieve can be referred to the beneficial effects in the corresponding methods, and will not be repeated here. The communication equipment can be a terminal or a network device.

[0109] This disclosure provides communication methods, apparatus, devices, systems, and storage media.

[0110] In some embodiments, the terms "communication method" and "for random access" can be used interchangeably, the terms "apparatus for random access" and "information processing apparatus" and "communication apparatus" can be used interchangeably, and the terms "information processing system" and "communication system" can be used interchangeably.

[0111] This disclosure is not exhaustive, but merely illustrative of some embodiments, and is not intended to limit the scope of protection of the embodiments disclosed. Unless otherwise specified, each step in a particular embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a particular embodiment can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment can be arbitrarily interchanged. Furthermore, the optional implementation methods in a particular embodiment can be arbitrarily combined; moreover, the embodiments can be arbitrarily combined, for example, some or all steps of different embodiments can be arbitrarily combined, and a particular embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0112] In each of the disclosed embodiments, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of the embodiments are consistent and can be referenced by each other. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0113] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this disclosure.

[0114] In this embodiment of the disclosure, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the," "the," "the," "the," "the," "this," etc., can mean "one and only one," or "one or more," "at least one," etc. For example, when using articles such as "a," "an," "the," etc. in translation, the noun following the article can be understood as either a singular expression or a plural expression.

[0115] In the embodiments disclosed herein, "multiple" refers to two or more.

[0116] In some embodiments, the terms “at least one of”, “at least one of”, “at least one of”, “one or more”, “a plurality of”, “multiple”, etc., may be used interchangeably.

[0117] The descriptions in this disclosure, such as "at least one of A, B, C..." or "A and / or B and / or C...", include the case where any one of A, B, C... exists alone, as well as the case where any combination of any of A, B, C... exists alone. Each case can exist alone. For example, "at least one of A, B, C" includes the cases of A alone, B alone, C alone, A and B combination, A and C combination, B and C combination, and A and B and C combination. For example, A and / or B includes the cases of A alone, B alone, and A and B combination.

[0118] In some embodiments, the notation "in one case A, in another case B" or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: A is executed regardless of B, i.e., A is executed in some embodiments; B is executed regardless of A, i.e., B is executed in some embodiments; A and B are selectively executed, i.e., A and B are selected for execution in some embodiments; A and B are both executed, i.e., A and B are executed in some embodiments. The same applies when there are more branches such as A, B, and C.

[0119] The prefixes "first," "second," etc., used in the embodiments of this disclosure are merely for distinguishing different descriptive objects and do not impose restrictions on the position, order, priority, quantity, or content of the descriptive objects. The description of the descriptive objects is found in the claims or the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the descriptive object is a "field," the ordinal numbers preceding "field" in "first field" and "second field" do not restrict the position or order of the "fields." "First" and "second" do not restrict whether the "fields" they modify are in the same message, nor do they restrict the order of "first field" and "second field." Similarly, if the descriptive object is a "level," the ordinal numbers preceding "level" in "first level" and "second level" do not restrict the priority between "levels." Furthermore, the number of descriptive objects is not limited by ordinal numbers and can be one or more. For example, in "first device," the number of "devices" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the object being described is "device", then "first device" and "second device" can be the same device or different devices, and their types can be the same or different. As another example, if the object being described is "information", then "first configuration" and "second configuration" can be the same information or different information, and their content can be the same or different.

[0120] In some embodiments, “including A,” “containing A,” “for indicating A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0121] In some embodiments, the terms “in response to…”, “in response to determining…”, “in the case of…”, “when…”, “if…”, “if…”, etc., can be used interchangeably.

[0122] In some embodiments, the terms “greater than,” “greater than or equal to,” “not less than,” “more than,” “more than or equal to,” “not less than,” “higher than,” “higher than or equal to,” “not lower than,” and “above” can be used interchangeably, as can the terms “less than,” “less than or equal to,” “not greater than,” “less than,” “less than or equal to,” “not more than,” “lower than,” “lower than or equal to,” “not higher than,” and “below”.

[0123] In some embodiments, devices, etc., can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as “device”, “equipment”, “circuit”, “network element”, “node”, “function”, “unit”, “section”, “system”, “network”, “chip”, “chip system”, “entity”, and “subject” can be used interchangeably.

[0124] In some embodiments, the terms "access network device (AN device)," "radio access network device (RAN device)," "base station (BS)," "radio base station," "fixed station," "node," "access point," "transmission point (TP)," "reception point (RP)," "transmission / reception point (TRP)," "panel," "antenna panel," "antenna array," "cell," "macro cell," "small cell," "femto cell," "pico cell," "sector," "cell group," "carrier," "component carrier," and "bandwidth part (BWP)" can be used interchangeably.

[0125] In some embodiments, the terms "terminal", "terminal device", "user equipment (UE)", "user terminal", "mobile station (MS)", "mobile terminal (MT)", "subscriber station", "mobile unit", "subscriber unit", "wireless unit", "remote unit", "mobile device", "wireless device", "wireless communication device", "remote device", "mobile subscriber station", "access terminal", "mobile terminal", "wireless terminal", "remote terminal", "handset", "user agent", "mobile client", and "client" can be used interchangeably.

[0126] In some embodiments, the access network device, core network device, or network device can be replaced by a terminal. For example, various embodiments of this disclosure can also be applied to structures that replace communication between the access network device, core network device, or network device and the terminal with communication between multiple terminals (e.g., also referred to as device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, the terminal can also be configured to have all or part of the functions of the access network device. Furthermore, terms such as "uplink" and "downlink" can be replaced with terms corresponding to communication between terminals (e.g., "side").

[0127] For example, uplink channels and downlink channels can be replaced with side channels, and uplink links and downlink links can be replaced with side links.

[0128] In some embodiments, the terms "uplink", "uplink", and "physical uplink" can be used interchangeably, as can the terms "downlink", "downlink", and "physical downlink", as well as the terms "sidelink", "sidelink", "sidelink communication", "sidelink communication", "direct connection", "direct link", "direct communication", and "direct link communication".

[0129] In some embodiments, the terms “downlink control information (DCI),” “downlink (DL) assignment,” “DL DCI,” “uplink (UL) grant,” and “UL DCI” can be used interchangeably.

[0130] In some embodiments, terms such as "physical downlink shared channel (PDSCH)" and "DL data" can be used interchangeably, as can terms such as "physical uplink shared channel (PUSCH)" and "UL data".

[0131] In some embodiments, the determination or judgment can be made by a value represented by 1 bit (0 or 1), or by a true or false value (boolean), or by a comparison of numerical values ​​(e.g., a comparison with a predetermined value), but is not limited thereto.

[0132] In some embodiments, "network" can be interpreted as devices included in a network (e.g., access network devices, core network devices, etc.).

[0133] In some embodiments, the acquisition of data, information, etc., may comply with the laws and regulations of the country where the location is situated.

[0134] In some embodiments, data, information, etc., may be obtained with the user's consent.

[0135] Figure 1 is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure.

[0136] As shown in Figure 1, the communication system 100 includes a terminal 101 and a network device 102.

[0137] In some embodiments, terminal 101 includes, but is not limited to, at least one of the following: mobile phone, wearable device, Internet of Things device, car with communication function, smart car, tablet computer, computer with wireless transceiver function, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal device in industrial control, wireless terminal device in self-driving, wireless terminal device in remote medical surgery, wireless terminal device in smart grid, wireless terminal device in transportation safety, wireless terminal device in smart city, and wireless terminal device in smart home.

[0138] In some embodiments, network device 102 may include at least one of access network device and core network device.

[0139] In some embodiments, the access network device is, for example, a node or device that connects a terminal to a wireless network. The network device may include, but is not limited to, at least one of the following in a 5G communication system: evolved Node B (eNB), next-generation eNB (ng-eNB), next-generation Node B (gNB), node B (NB), home node B (HNB), home evolved node B (HeNB), wireless backhaul device, radio network controller (RNC), base station controller (BSC), base transceiver station (BTS), base band unit (BBU), mobile switching center, base station in a 6G communication system, open RAN, cloud RAN, base station in other communication systems, and access node in a wireless fidelity (WiFi) system.

[0140] In some embodiments, the technical solutions of this disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within network devices involved in the embodiments of this disclosure can be transformed into internal interfaces of Open RAN. The processes and information interactions between these internal interfaces can be implemented by software or programs.

[0141] In some embodiments, the access network device may be composed of a central unit (CU) and a distributed unit (DU). The CU may also be called a control unit. The CU-DU structure can separate the protocol layer of the network device. Some of the protocol layer functions are centrally controlled by the CU, while the remaining part or all of the protocol layer functions are distributed in the DU and centrally controlled by the CU. However, this is not the only possibility.

[0142] In some embodiments, the access network device may be a single device, multiple devices, or a group of devices, including all or part of a first network element, a second network element, etc. Network elements may be virtual or physical. Network devices may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).

[0143] In some embodiments, a core network device may be a single device comprising one or more network elements, or it may be multiple devices or a group of devices, each comprising all or part of the aforementioned one or more network elements. Network elements may be virtual or physical. The core network may include, for example, at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), or a Next Generation Core (NGC).

[0144] It is understood that the communication system described in this disclosure is for the purpose of more clearly illustrating the technical solutions of this disclosure, and does not constitute a limitation on the technical solutions proposed in this disclosure. As those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions proposed in this disclosure are also applicable to similar technical problems.

[0145] The following embodiments of this disclosure can be applied to the communication system 100 shown in FIG1, or to some of the main bodies, but are not limited thereto. The main bodies shown in FIG1 are illustrative. The communication system may include all or some of the main bodies in FIG1, or may include other main bodies outside of FIG1. ​​The number and form of each main body are arbitrary. The connection relationship between the main bodies is illustrative. The main bodies may not be connected or may be connected. The connection can be in any way, it can be a direct connection or an indirect connection, it can be a wired connection or a wireless connection.

[0146] The embodiments disclosed herein can be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), and IEEE 802.20, Ultra-Wideband (UWB), Bluetooth (a registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X) systems, utilizing other systems for random access, and next-generation systems built upon them, etc. Furthermore, multiple systems can be combined (e.g., a combination of LTE or LTE-A with 5G).

[0147] Terrestrial networks (TN) rely on terrestrial base stations to provide wireless coverage and enable wireless signal transmission between the communication network and user terminals. Currently, TN coverage deployment strategies generally adopt a "macro-micro combination, layered coverage" approach, using base stations at different levels to achieve signal coverage and meet communication needs in different scenarios. Macro base stations are mainly used for outdoor coverage; they are typically deployed on towers, are large in size and consume high power, and are responsible for providing coverage over long distances.

[0148] Signals exhibit different propagation characteristics across different frequency bands: low-frequency signals have stronger penetration and wider coverage, thus requiring fewer base stations to achieve broader coverage; high-frequency signals, while having larger bandwidth, attenuate faster and have smaller coverage, requiring more base stations to achieve the same coverage area. For example, the inter-station spacing in density zoning refers to the inter-station spacing requirements of the mainstream 3.5GHz system, as shown in Table 1 below.

[0149] Table 1. Station spacing for each density zone

[0150] Non-terrestrial networks (NTNs) are networks that utilize non-terrestrial communication infrastructure such as satellites to achieve global communication coverage. They offer advantages such as large coverage areas and long communication distances. The coverage radius of an NTN cell can reach tens to hundreds of kilometers, and typically uses the following two schemes:

[0151] 1) Quasi-Earth Fixed Cell Scheme: This refers to an NTN scheme that fixes the satellite cell at a specific geographical location on Earth for a certain period of time. The continuous service duration of this scheme is related to the satellite orbital altitude and minimum elevation angle, and can range from a few minutes to tens of minutes.

[0152] 2) Earth-Moving Cell Scheme: This refers to the NTN scheme where the satellite cell moves continuously across the Earth's surface. The satellite cell beam footprint sweeps across the ground, and the cell's coverage location moves with the satellite. The continuous service duration of this scheme depends on the satellite's orbital altitude and the beam coverage diameter, and can range from a few seconds to tens of seconds.

[0153] 3) Fixed Earth Cell Scheme: This refers to the fixed geographical location of the Earth's surface covered by satellite cells, such as the geographical area of ​​the Earth covered by geostationary orbit satellites.

[0154] In existing technologies, a dedicated System Information Block (SIB) is defined for satellite broadcast information, namely SIB19. SIB19 contains satellite auxiliary information for accessing the NTN, and its field definitions may include:

[0155] 1)ntn-Config provides the parameters required for UE access via NTN, such as ephemeris data, common timing advance parameters, and the effective duration of uplink synchronization information;

[0156] 2) t-Service indicates when an NTN cell should stop serving the current coverage area;

[0157] 3) Reference Location refers to the reference point in the NTN fixed Earth cell;

[0158] 4) distanceThresh represents the distance threshold from the reference location of the serving cell. It is a trigger condition based on location measurement and is in units of 50m.

[0159] 5) ntn-NeighCellConfigList provides a list of neighboring cells for the NTN, including ntn-Config, carrier frequency, and PhysCellID;

[0160] 6) movingReferenceLocation refers to the reference point of the NTN (Network Telescope) moving cell;

[0161] 7) SatSwitchWithReSync provides the parameters needed for resynchronization when switching target satellites.

[0162] The mobility state of User Equipment (UE) in communication systems has been extensively studied: if parameter T is broadcast in the system information of the serving cell... CRmax N CR_H N CR_M T CRmaxHyst Then the UE mobility status can be determined.

[0163] ·T CRmax : Evaluate the duration of the allowed number of cell reselections.

[0164] ·N CR_H The number of cell reselections required for the UE to enter high-speed mobile state.

[0165] ●N CR_M The number of cell reselections required for a UE to enter medium-speed mobile mode.

[0166] ●T CRmaxHyst: An additional time period before the UE enters normal mobile state.

[0167] 1) Condition detection standards:

[0168] • Standard for normal movement status: within time period T CRmax The number of times a cell can be reselected within a given area is less than N. CR_M .

[0169] • Standard for medium-speed movement: within time period T CRmax The number of times the cell can be reselected is greater than or equal to N. CR_M And less than or equal to N CR_H .

[0170] ●High-speed movement status standard: within the time period T CRmax The number of times the cell can be reselected within the range is greater than N. CR_H .

[0171] 2) State transition:

[0172] ●If a high-speed mobility state standard is detected, the UE will enter high-speed mobility state.

[0173] • If the medium-speed movement state standard is detected, the UE will enter the medium-speed movement state.

[0174] • If in T CRmaxHyst If no medium-speed or high-speed mobility state standard is detected during the period, the UE will enter normal mobility state.

[0175] If the UE is in a high-speed or medium-speed movement state, the UE will apply the speed-related scaling rules defined in 3).

[0176] 3) Scaling rules:

[0177] • If high-speed movement is detected:

[0178] If the system information broadcasts Q hyst If the speed depends on the scaling factor sf-High, then add it to Q. hyst superior;

[0179] For NR cells, if Treselection is broadcast in the system information NR If the speed depends on the scaling factor sf-High, then compare it with Treselection. NR Multiply;

[0180] For EUTRA cells, if Treselection is broadcast in the system information EUTRA If the speed depends on the scaling factor sf-High, then compare it with Treselection. EUTRA Multiply.

[0181] • If medium-speed movement is detected:

[0182] If the system information broadcasts Q hyst If the speed depends on the scaling factor sf-Medium, then add it to Q. hyst superior;

[0183] For NR cells, if Treselection is broadcast in the system information NR The speed depends on the scaling factor sf-Medium, so it is compared with Treselection. NR Multiply;

[0184] For EUTRA cells, if Treselection is broadcast in the system information EUTRA If the speed depends on the scaling factor sf-Medium, then compare it with Treselection. EUTRA Multiply.

[0185] Because terrestrial base stations in the TN network have a small coverage area and are densely distributed, UEs moving at high speeds will quickly traverse multiple TN cells, thus frequently initiating measurements and performing multiple TN cell reselections. Furthermore, due to the significant near-far effect in the TN network, signal strength decreases sharply as the distance between the UE and the terrestrial base station increases, causing the UE to still perform multiple TN cell reselections within a short period.

[0186] To address the aforementioned technical problem of reducing the number of TN cell reselections, it was proposed that scaling the reselection parameters Treselection (minimum dwell time in the cell before reselection) and Qhyst (reselection hysteresis value) could improve the requirements for initiating measurements. However, due to the small coverage area of ​​terrestrial base stations, the gain of this approach is limited and cannot effectively solve the problem of high terminal power consumption caused by frequent TN cell reselections.

[0187] To reduce the number of cell reselections for the UE and meet the energy-saving requirements of the UE in the disconnected state, this disclosure proposes a cell reselection method for the UE in a high-speed mobile state. This method takes advantage of the wide coverage and minimal near-far effect of NTN cells, and comprehensively considers factors such as service duration, distance, and UE motion state to more rationally reselect to NTN cells, greatly reducing the number of cell reselections and lowering the power consumption generated by multiple measurements.

[0188] Based on the aforementioned wireless communication system, various embodiments of the communication method proposed in this disclosure will be described in detail below.

[0189] In some embodiments, the terminal performs cell reselection based on the acquired first information.

[0190] In some embodiments, the way a terminal obtains the first information may include the terminal receiving the first information sent by a network device.

[0191] In some embodiments, the first information may include a first threshold related to the mobile state of the terminal.

[0192] In some embodiments, the terminal may determine its mobility state as a first mobility state based on a first threshold related to its mobility state, including the acquired first information, and perform cell reselection based on the priority of the NTN frequency specified in the protocol. Optionally, the first mobility state may be a high-speed mobility state.

[0193] In some embodiments, the protocol specifies the frequency priority corresponding to different mobility states of the terminal. Optionally, the protocol specifies that the frequency priority of NTN is high priority in high-speed mobility states.

[0194] In some embodiments, when a terminal determines that it is in or has entered a high-speed mobile state based on a first threshold related to the terminal's mobility state, the terminal may determine to prioritize measuring the NTN frequency for cell reselection based on the high priority of the NTN frequency in the high-speed mobile state as specified in the protocol.

[0195] In some embodiments, the first information may include a first threshold related to the mobility state of the terminal, and frequency point priorities corresponding to different mobility states of the terminal.

[0196] In some embodiments, the terminal determines the terminal's mobility state as a first mobility state based on the first information obtained, including a first threshold related to the terminal's mobility state, and performs cell reselection according to the priority of the NTN frequency determined by the first mobility state.

[0197] Optionally, the first movement state can be a high-speed movement state, and the NTN frequency has high priority.

[0198] In some embodiments, when a terminal determines that it is in or has entered a high-speed mobile state based on a first threshold related to the terminal's mobility state included in the first information, the terminal can determine, based on the frequency priority corresponding to different mobility states of the terminal included in the first information, to prioritize measuring the NTN frequency for cell reselection in the high-speed mobile state.

[0199] In some embodiments, a terminal in a high-speed mobile state may prioritize measuring the NTN frequency and prioritize reselecting to an NTN cell.

[0200] It should be noted that the specific implementation method of cell reselection for terminals in high-speed mobile state can be referred to the relevant description of step S202 shown in Figure 2 below.

[0201] Figure 2 is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in Figure 2, the communication method is used in a communication system 100, and the method includes:

[0202] S201, Network device 102 sends the first information to terminal 101.

[0203] In some embodiments, the first information includes: a first threshold related to the mobility state of the terminal and / or the frequency priority corresponding to different mobility states of the terminal.

[0204] In some embodiments, the mobility status can be determined by the number of cell reselections or the terminal’s mobility speed (e.g., X km / h), but is not limited thereto.

[0205] In some embodiments, the first threshold related to the mobility state of the terminal may include a first threshold related to the number of cell reselections, or a first threshold related to the mobility speed of the terminal.

[0206] In some embodiments, the first threshold related to the number of cell reselections can be a time period T. CRmax The threshold for the number of cell reselections within a given number of cells, for example: N. CR_H Optional, T Crmax To assess the duration of the allowed number of cell reselections. N CR_H This represents the number of cell reselections required for the terminal to enter high-speed mobility mode. In other words, N... CR_H It can indicate whether the terminal has entered a high-speed movement state.

[0207] In some embodiments, different movement states of the terminal may include: high-speed movement state, medium-speed movement state, or normal movement state. Optionally, if the terminal is in time period T... CRmax The number of times a cell can be reselected within a given area is less than N. CR_M If N is positive, then the terminal is determined to be in a normal mobile state. CR_M This represents the number of cell reselections required for the terminal to enter medium-speed mobility mode. Optionally, if the terminal is in time period T... CRmax The number of times the cell can be reselected is greater than or equal to N. CR_M And less than or equal to N CR_H If so, then the terminal is determined to be in a medium-speed movement state. Optionally, if the terminal is in time period T... CRmax The number of times the cell can be reselected within the range is greater than N. CR_H If so, it can be determined that the terminal is in a high-speed moving state.

[0208] In some embodiments, a first threshold related to the terminal's moving speed can indicate whether the terminal has entered a high-speed moving state. Optionally, if the terminal's moving speed is greater than the first threshold, it is determined that the terminal is in a high-speed moving state; if the terminal's moving speed is less than or equal to the first threshold, it is determined that the terminal is in a low-speed moving state. Exemplarily, the first threshold is a speed value.

[0209] In some embodiments, different frequency priorities correspond to different mobility states of the terminal. Optionally, the frequency priority corresponding to the high-speed mobility state may refer to the frequency of NTN cells having high priority. That is, if the terminal is in a high-speed mobility state, the NTN frequency is measured first and the terminal is preferentially reselected to an NTN cell. Optionally, the frequency priority corresponding to the non-high-speed mobility state may refer to the frequency of TN cells having high priority. That is, if the terminal is in a non-high-speed mobility state, the TN frequency is measured first and the terminal is preferentially reselected to a TN cell. Optionally, the non-high-speed mobility state may include: medium-speed mobility state, and / or, normal mobility state.

[0210] In some embodiments, an NTN frequency indicates that an NTN is deployed on that frequency, or an NTN frequency indicates that the frequency is dedicated to an NTN.

[0211] In some embodiments, a TN frequency indicates that a TN is deployed on that frequency, or that the TN frequency is dedicated to a TN.

[0212] In some embodiments, if the first information does not include the frequency priority corresponding to the high-speed mobility state, the frequency priority determined by the UE is unrelated to the UE's mobility state. For example, the frequency priority is determined based on a legacy frequency priority scheme.

[0213] In some embodiments, the first information may include a correspondence between different mobility states and their corresponding frequency priorities. Optionally, the correspondence may include: a high-speed mobility state and its corresponding high-priority frequency (e.g., the frequency of NTN), and / or, a non-high-speed mobility state and its corresponding high-priority frequency (e.g., the frequency of TN).

[0214] In some embodiments, the first information may include indication information for indicating the frequency priority corresponding to different mobility states. Optionally, 1 bit may be used for indication; for example, a bit value of "1" indicates that the NTN frequency has high priority in high-speed mobility states, and a bit value of "0" indicates that the TN frequency has high priority in non-high-speed mobility states. Alternatively, a bit value of "0" indicates that the NTN frequency has high priority in high-speed mobility states, and a bit value of "1" indicates that the TN frequency has high priority in non-high-speed mobility states. Alternatively, if the first information includes indication information, then it is used to indicate that the NTN frequency has high priority in high-speed mobility states. If the first information does not include indication information, then the frequency priority is independent of the terminal's mobility state, and existing frequency priority schemes can be used to determine the frequency priority.

[0215] In some embodiments, the first information may be configuration information. Optionally, the network device may send configuration information to the terminal.

[0216] In some embodiments, the first information may be carried via system messages and / or Radio Resource Control (RRC) messages, but is not limited thereto. Optionally, the RRC message may be an RRC release message.

[0217] In some embodiments, the network device may send first information to the terminal via system messages and / or RRC release messages.

[0218] In some embodiments, the terminal may receive first information sent by the network device via system messages and / or RRC release messages.

[0219] S202, Terminal 101 performs cell reselection based on the first information. The first information includes: a first threshold related to the terminal's mobility state and frequency priority corresponding to different mobility states of the terminal.

[0220] In some embodiments, the terminal may receive first information sent by the network device and perform cell reselection based on a first threshold related to the terminal's mobility state and frequency point priorities corresponding to different mobility states of the terminal, which are included in the first information.

[0221] In some embodiments, step S202 may also be replaced by including:

[0222] S202-1, Terminal 101 performs cell reselection based on the first information. The first information includes a first threshold related to the terminal's mobility state. The protocol stipulates that the frequency priority of the NTN is high priority in high-speed mobility states.

[0223] In some embodiments, the terminal may determine its movement state as a first movement state based on a first threshold related to the terminal's movement state included in the first information. Optionally, the first movement state may be a high-speed movement state.

[0224] In some embodiments, the first threshold related to the mobile state of the terminal can be a time period T. CRmax The threshold for the number of cell reselections within a given number of cells, for example: N. CR_H Optional, T Crmax To assess the duration of the allowed number of cell reselections. N CR_H This represents the number of cell reselections required for the terminal to enter high-speed mobility mode. In other words, N... CR_H It can indicate whether the terminal has entered a high-speed movement state.

[0225] In some embodiments, the terminal can be based on a time period T. CRmax Does the number of cell reselections exceed the first threshold N? CR_H This is used to determine whether the terminal has entered a high-speed movement state. Optionally, if the time period T... CRmax The number of cell reselections within the specified range exceeds the first threshold N. CR_H If so, the terminal is in a high-speed moving state.

[0226] In some embodiments, the first threshold related to the mobile state of the terminal may be a speed threshold. Optionally, the speed threshold may indicate whether the terminal has entered a high-speed mobile state.

[0227] In some embodiments, the terminal may determine whether it has entered a high-speed movement state based on whether its speed exceeds a speed threshold. Optionally, if the terminal's speed exceeds the speed threshold, the terminal is in a high-speed movement state.

[0228] S202-2. Perform cell reselection based on the priority of the NTN frequency determined in the first mobile state.

[0229] In some embodiments, the terminal may determine the NTN frequency corresponding to the frequency point priority based on the determined frequency point priority corresponding to the first mobile state.

[0230] In some embodiments, if the first movement state is a high-speed movement state, then the NTN frequency has high priority.

[0231] In some embodiments, an NTN frequency indicates that an NTN is deployed on that frequency, or an NTN frequency indicates that the frequency is dedicated to an NTN.

[0232] Optionally, if the terminal determines that it is in a high-speed mobile state, it can determine that the frequency point of the NTN cell corresponding to the high-speed mobile state is of high priority based on the frequency point priority corresponding to different mobile states included in the first information, and then determine to perform cell reselection based on the NTN cell.

[0233] In some embodiments, step S202-2 may include:

[0234] S202-21. Determine the first cell based on the NTN frequency.

[0235] In some embodiments, the coverage area of ​​the first cell does not change with the movement of the satellite during the first time period. Optionally, the first cell may include: a fixed Earth cell or a quasi-fixed Earth cell.

[0236] In some embodiments, the first information may further include: cell information.

[0237] In some embodiments, the first information may include broadcast information for the satellite, namely: a dedicated system information block (SIB) 19.

[0238] In some embodiments, cell information may include satellite cell information.

[0239] In some embodiments, the terminal may select a fixed Earth cell or a quasi-fixed Earth cell as the first cell from the NTN cells corresponding to the NTN frequency based on satellite cell information.

[0240] S202-22. Based on the second cell in the first cell whose remaining service time meets the first condition, cell reselection is performed.

[0241] In some embodiments, a cell in the first cell whose remaining service duration meets a first condition is identified as a second cell.

[0242] In some embodiments, the terminal may select a second cell from the first cell that meets the condition based on whether the remaining service time of the first cell meets the first condition.

[0243] In some embodiments, prior to steps S202-22, the above method may further include:

[0244] Get the remaining service time for each cell in the first cell.

[0245] In some embodiments, the first information may include SIB19, from which the terminal can obtain the remaining service time of each first cell.

[0246] In some embodiments, the first condition includes: the remaining service duration of the cell is greater than a second threshold related to the service duration.

[0247] In some embodiments, the second threshold related to service duration may be a minimum service duration threshold.

[0248] In some embodiments, the second threshold may be set by the terminal or configured by the network device (e.g., pre-configured), but is not limited thereto.

[0249] In some embodiments, the terminal may select a cell from the first cells whose remaining service duration is greater than the minimum service duration threshold as the second cell. Optionally, the terminal may compare the remaining service duration of each first cell with the minimum service duration threshold. If the remaining service duration of a first cell is greater than the minimum service duration threshold, the first cell is retained as the second cell. If the remaining service duration of a first cell is less than the minimum service duration threshold, the first cell is not considered.

[0250] It should be noted that in the above embodiments, if the remaining service duration of the first cell is equal to the minimum service duration threshold, the first cell can be retained, or the first cell can be disregarded; there is no limitation on this.

[0251] In some embodiments, step S202-22 may include:

[0252] According to criterion R, determine the target cell from the second cell mentioned above, and reselect to the target cell; or...

[0253] Select the cell with the longest remaining service time from the second cell mentioned above as the target cell, and reselect to the target cell.

[0254] In some embodiments, the terminal may determine the cell to be reselected from the second cells according to the R criterion; or, the terminal may determine the cell with the longest remaining service time in the second cells as the cell to be reselected.

[0255] It should be noted that the R criterion is an existing criterion for cell reselection, and for the sake of brevity, it will not be elaborated here.

[0256] In some embodiments, selecting the cell with the longest remaining service time from the second cells as the target cell may include:

[0257] The communities in the second community that meet the second condition will be designated as the third community;

[0258] The community with the longest remaining service time in the third community is identified as the target community.

[0259] In some embodiments, the second condition described above may include:

[0260] The terminal is located within the first area; or,

[0261] The terminal is located outside the first area, and the distance between the terminal and the reference point of the cell decreases.

[0262] In some embodiments, if the distance between the terminal and the reference point of the cell is less than the coverage radius of the first area, then the terminal is located within the first area.

[0263] In some embodiments, the terminal may determine its distance from reference points of each of the second cells.

[0264] In some embodiments, if the distance between the terminal and a reference point of a second cell is less than the coverage radius of the first area, the second cell is retained as a third cell.

[0265] In some embodiments, if the distance between the terminal and a reference point of a second cell is greater than the coverage radius of the first area, but the distance between the terminal and the reference point of the second cell becomes smaller, the second cell can be retained as a third cell.

[0266] In some embodiments, if the distance between the terminal and a reference point of a second cell is greater than the coverage radius of the first area, but the terminal is moving towards the reference point of the second cell, then the second cell can be retained as a third cell.

[0267] In some embodiments, if the distance between the terminal and a reference point of a second cell is greater than the coverage radius of the first area, but the terminal moves in the same direction as the satellite, the second cell can be retained as a third cell.

[0268] In some embodiments, if the distance between the terminal and a reference point of a second cell is greater than the coverage radius of the first area, and the distance between the terminal and the reference point of the second cell increases, then the second cell is not considered.

[0269] In some embodiments, if the distance between the terminal and a reference point of a second cell is greater than the coverage radius of the first area, but the terminal is moving away from the reference point of the second cell, then the second cell is not considered.

[0270] In some embodiments, if the distance between the terminal and a reference point of a second cell is greater than the coverage radius of the first area, but the terminal's direction of movement is opposite to the direction of satellite movement, then the second cell is not considered.

[0271] In some embodiments, if the distance between the terminal and a reference point of a second cell is equal to the coverage radius of the first area, the second cell may be retained as a third cell, or the second cell may be disregarded.

[0272] In some embodiments, after filtering out a third cell that meets the second condition from the second cell, the remaining service time of each third cell can be compared, and the cell with the longest remaining service time can be selected as the target cell, and the selection can be re-to the target cell.

[0273] In some embodiments, the first region is determined based on the terminal's speed information, the cell's coverage information, and the remaining service time.

[0274] In some embodiments, the coverage radius of the first area can be determined based on the terminal's speed information, the cell's coverage information, and the remaining service time.

[0275] In some embodiments, the coverage information of a cell can be the coverage radius of the cell.

[0276] In some embodiments, the coverage radius of the first area can be determined based on the product of the cell's coverage radius, the terminal's speed, and the cell's remaining service time.

[0277] Optionally, the coverage radius of the first area = the coverage radius of the cell - the terminal speed * the remaining service time of the cell.

[0278] In some embodiments, the coverage radius of the first area can be referred to as the safe zone, that is, the terminal will not move outside the cell within the remaining service time provided by the cell.

[0279] In some embodiments, each second cell has a corresponding first area.

[0280] For example, assuming the second cell includes cells #1, #2, and #3, then:

[0281] The coverage radius d#1 of the first area corresponding to cell #1 = coverage radius of cell #1 - terminal speed * remaining service time of cell #1;

[0282] The coverage radius d#2 of the first area corresponding to cell #2 = coverage radius of cell #2 - terminal speed * remaining service time of cell #2;

[0283] The coverage radius d#3 of the first area corresponding to cell #3 = coverage radius of cell #3 - terminal speed * remaining service time of cell #3.

[0284] If the distance between the terminal and the reference point of cell #1 is less than d#1, then the terminal is within the first area corresponding to cell #1, and cell #1 can be retained. If the distance between the terminal and the reference point of cell #2 is greater than d#2, then the terminal is outside the first area corresponding to cell #2. If the distance between the terminal and the reference point of cell #2 decreases, then cell #2 can be retained. If the distance between the terminal and the reference point of cell #3 is greater than d#3, then the terminal is outside the first area corresponding to cell #3. If the distance between the terminal and the reference point of cell #3 increases, then cell #3 is not considered.

[0285] In the example above, cells #1 and #2 are identified as the third cell. For instance, the terminal can compare the remaining service time of cells #1 and #2. If the remaining service time of cell #1 is longer than that of cell #2, then cell #1 is identified as the target cell, and the terminal reselects cell #1; if the remaining service time of cell #2 is longer than that of cell #1, then cell #2 is identified as the target cell, and the terminal reselects cell #2.

[0286] In some embodiments, the reference point of a cell may also be referred to as the reference location of the cell or other similar names, and this application embodiment does not limit this.

[0287] It should be noted that, in the embodiments disclosed herein, the setting of the reference point of the cell is not specifically limited. For example, the reference point of the cell may refer to the location of the center point of the cell, but is not limited to this.

[0288] In some embodiments, the shape of the second cell may be irregular. In this case, when the reference point of the second cell is the center position of the first cell, it may refer to the geometric center position of the first cell.

[0289] In some embodiments, the reference point of the second cell may be predefined or preconfigured according to the protocol.

[0290] In some embodiments, the reference point of the second cell may be configured by a network device. For example, the network device may configure the reference point of the second cell through higher-layer signaling or system information, but is not limited thereto.

[0291] In some embodiments, prior to steps S202-22, the method may further include: obtaining at least one of the following information:

[0292] The direction of movement of the terminal;

[0293] The terminal's geographical location information;

[0294] Coverage information for each cell in the second cell;

[0295] Reference points for each cell in the second cell.

[0296] In some embodiments, the terminal's direction of movement and / or geographic location information can be obtained by the terminal based on its own GNSS function, which will not be elaborated here.

[0297] In some embodiments, the coverage information and / or reference point of each cell in the second cell can be obtained from the network device. Optionally, the first information sent by the network device to the terminal may also include SIB19, from which the terminal can obtain the coverage information and / or reference point of each cell in the second cell.

[0298] In some embodiments, the terminal selects the cell with the longest remaining service time from the second cell as the target cell based on at least one of the information obtained above.

[0299] S203, Terminal 101 performs scaling processing on the reselection parameters of the target cell for reselection.

[0300] In some embodiments, in order to better adapt to the mobile state of the terminal, the terminal can scale the reselection parameters of the target cell after cell reselection.

[0301] In some embodiments, reselection parameters may include: Treselection (minimum dwell time in this cell before reselection) and / or Qhyst (reselection hysteresis value).

[0302] In some embodiments, the terminal may use existing speed-related scaling rules to scale the reselection parameters, which will not be elaborated here.

[0303] In some embodiments, the names of information, etc., are not limited to those described in the embodiments. Terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", and "data" can be used interchangeably.

[0304] In some embodiments, terms such as “send,” “transmit,” “report,” “distribute,” “transmit,” “bidirectional transmission,” “send and / or receive” can be used interchangeably.

[0305] In some embodiments, terms such as "certain," "preset," "default," "set," "indicated," "a certain," "any," and "first" can be used interchangeably. "Certain A," "preset A," "default A," "set A," "indicated A," "a certain A," "any A," and "first A" can be interpreted as A pre-defined in a protocol or the like, or as A obtained through setting, configuration, or instruction, or as specific A, a certain A, any A, or first A, but are not limited thereto.

[0306] In some embodiments, terms such as “in the case of,” “when,” “when,” “if,” “if,” etc., can be used interchangeably.

[0307] The method involved in the embodiments of this disclosure may include at least one of steps S201 to S203. For example, step S201 may be implemented as a separate embodiment, and steps S201 and S202 may be implemented as separate embodiments, but are not limited thereto.

[0308] In some embodiments, step S203 is optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0309] Figure 3a is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 3a, the communication method can be executed by terminal 101, and the method includes:

[0310] S301, Obtain first information.

[0311] In some embodiments, the terminal obtaining the first information can be understood as the terminal receiving the first information sent by the network device.

[0312] In some embodiments, the terminal may also obtain the first information in other ways, such as, but not limited to, receiving the first information sent by other devices.

[0313] In some embodiments, the first information may include a first threshold related to the mobility state of the terminal, and / or the frequency priority corresponding to different mobility states of the terminal. Optional implementations of step S301 can be found in the optional implementations of step S201 in FIG2 and other related parts in the embodiments involved in FIG2, which will not be repeated here.

[0314] S302. Perform cell reselection based on the first information.

[0315] In some embodiments, step S302 may include: determining that the terminal is in a first mobile state based on the first threshold; and performing cell reselection based on the priority of the NTN frequency specified in the protocol.

[0316] Optionally, the protocol specifies the frequency priority corresponding to different mobility states of the terminal. For example, the protocol specifies that the NTN frequency priority is high priority in high-speed mobility states.

[0317] In some embodiments, step S302 may include: determining that the terminal is in a first mobile state based on a first threshold included in the first information; and performing cell reselection based on the priority of the NTN frequency determined by the first mobile state.

[0318] The optional implementation of step S302 in this embodiment can be found in the optional implementation of step S202 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0319] In some embodiments, the first mobility state is a high-speed mobility state, and the NTN frequency has high priority. Optionally, if the terminal determines that it has entered the high-speed mobility state based on a first threshold, cell reselection is preferentially performed based on the NTN cell corresponding to the NTN frequency.

[0320] In some embodiments, the terminal determines a first cell based on the NTN frequency; and performs cell reselection based on a second cell in the first cell whose remaining service duration meets a first condition.

[0321] In some embodiments, the first cell includes: a fixed Earth cell or a quasi-fixed Earth cell.

[0322] In some embodiments, before determining the second cell, the terminal may also obtain the remaining service time of each cell in the first cell.

[0323] In some embodiments, the first condition may include the remaining service duration of the cell being greater than a second threshold related to the service duration. Optionally, the terminal may compare the remaining service duration of each first cell with the second threshold and retain the first cells with a remaining service duration greater than the second threshold as second cells.

[0324] In some embodiments, the terminal may determine the target cell from the second cell according to the R criterion and reselect to the target cell.

[0325] In some embodiments, the terminal may select the cell with the longest remaining service time from the second cell as the target cell and reselect to that target cell.

[0326] In some embodiments, the terminal can determine the distance between itself and the reference points of each second cell, and based on this distance and the coverage radius of the first area, determine whether the terminal is within the first area. If the terminal is within the first area, it is determined that the second cell corresponding to that distance can be retained. If the terminal is outside the first area, and the distance between the terminal and the reference point of the second cell decreases, then the second cell can also be retained; otherwise, the second cell is not considered. The terminal can compare the remaining service duration of the retained second cells (which may correspond to the third cell mentioned above), select the cell with the longest remaining service duration as the target cell, and reselect to that target cell.

[0327] In some embodiments, the first region is determined based on the terminal's speed information, the cell's coverage information, and the remaining service time.

[0328] In some embodiments, before selecting the cell with the longest remaining service time from the second cell as the target cell, the terminal may also obtain the terminal's direction of movement, geographical location information, and at least one of the coverage information and reference points of each cell in the second cell.

[0329] S303. Scaling the reselection parameters of the target cell for reselection.

[0330] In some embodiments, after performing cell reselection, the terminal can scale the reselection parameters of the target cell.

[0331] The optional implementation of step S303 can be found in the optional implementation of step S203 in Figure 2 and other related parts in the embodiments involved in Figure 2, which will not be repeated here.

[0332] The method involved in the embodiments of this disclosure may include at least one of steps S301 to S303. For example, steps S301 and S302 may be implemented as independent embodiments, but are not limited thereto.

[0333] In some embodiments, step S303 is optional, and one or more of these steps may be omitted or substituted in different embodiments.

[0334] Figure 3b is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 3b, the communication method can be executed by terminal 101, and the method includes:

[0335] S311, Obtain first information.

[0336] In some embodiments, obtaining the first information can be understood as receiving the first information. Optionally, the terminal may receive the first information sent by the network device, but is not limited thereto; for example, the terminal may also receive the first information sent by other devices.

[0337] In some embodiments, the first information may include a first threshold related to the mobile state of the terminal.

[0338] In some embodiments, the first information may include a first threshold related to the mobility state of the terminal and frequency priority corresponding to different mobility states of the terminal.

[0339] The optional implementation of step S311 can be found in step S201 of Figure 2, the optional implementation of step S301 of Figure 3a, and other related parts in the embodiments involved in Figure 2, which will not be repeated here.

[0340] S312. Perform cell reselection based on the first information.

[0341] In some embodiments, step S312 may include: determining that the terminal is in a first mobile state based on the first threshold; and performing cell reselection based on the priority of the NTN frequency specified in the protocol.

[0342] In some embodiments, step S312 may include: determining that the terminal is in a first mobile state based on a first threshold; and performing cell reselection based on the priority of the NTN frequency determined by the first mobile state.

[0343] The optional implementation of step S312 in this embodiment can be found in step S202 in Figure 2, the optional implementation of step S302 in Figure 3a, and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0344] In some embodiments, the first movement state is a high-speed movement state, and the NTN frequency has high priority.

[0345] In some embodiments, cell reselection is performed based on the priority of the NTN frequency, including:

[0346] Based on the NTN frequency, the first cell is determined, which includes: a fixed earth cell or a quasi-fixed earth cell;

[0347] Cell reselection will be performed based on the second cell in the first cell whose remaining service time meets the first condition.

[0348] In some embodiments, cell reselection is performed based on a second cell in the first cell whose remaining service time meets a first condition, including:

[0349] The target cell is determined from the second cell according to the R criterion, and the cell is reselected to the target cell; or...

[0350] Select the cell with the longest remaining service time from the second cell as the target cell, and reselect to the target cell.

[0351] In some embodiments, selecting the cell with the longest remaining service time from the second cells as the target cell includes:

[0352] The communities in the second community that meet the second condition will be designated as the third community;

[0353] The community with the longest remaining service time in the third community is identified as the target community;

[0354] The second condition includes:

[0355] The terminal is located within the first area; or,

[0356] The terminal is located outside the first area, and the distance between the terminal and the reference point of the cell decreases;

[0357] The first area is determined based on the terminal's speed information, the cell's coverage information, and the remaining service time.

[0358] In some embodiments, if the distance between the terminal and the reference point of the cell is less than the coverage radius of the first area, then the terminal is located within the first area.

[0359] In some embodiments, the first condition includes: the remaining service duration of the cell is greater than a second threshold related to the service duration.

[0360] In some embodiments, the method further includes: obtaining the remaining service time for each cell in the first cell.

[0361] In some embodiments, the method further includes scaling the reselection parameters of the target cell.

[0362] The above optional implementation methods can be found in step S203 of FIG2, step S303 of FIG3a, and other related parts in the embodiments involved in FIG2, which will not be repeated here.

[0363] In some embodiments, the method further includes: obtaining at least one of the following:

[0364] The direction of movement of the terminal;

[0365] The terminal's geographical location information;

[0366] Coverage information for each cell in the second cell;

[0367] Reference points for each cell in the second cell.

[0368] Figure 4 is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 4, the method involved in this embodiment is executed by network device 102, and the method includes:

[0369] S401, Send the first information to the terminal.

[0370] In some embodiments, the first information is used for cell reselection.

[0371] In some embodiments, the first information includes a first threshold related to the mobile state of the terminal.

[0372] In some embodiments, the first information includes: a first threshold related to the mobility state of the terminal and frequency point priorities corresponding to different mobility states of the terminal.

[0373] The optional implementation of step S401 can be found in the optional implementation of step S201 in Figure 2 and other related parts in the embodiments involved in Figure 2, which will not be repeated here.

[0374] In some embodiments, a first threshold related to the mobility state of the terminal is used by the terminal to determine the first mobility state of the terminal, and cell reselection is performed by the terminal based on the priority of the NTN frequency determined by the first mobility state.

[0375] In some embodiments, a first threshold related to the mobility state of the terminal is used by the terminal to determine the first mobility state of the terminal, and the cell reselection is performed by the terminal according to the priority of the NTN frequency specified in the protocol.

[0376] In some embodiments, the first movement state is a high-speed movement state, and the NTN frequency has high priority.

[0377] In some embodiments, cell reselection is performed by the terminal on a second cell among the first cells determined by the NTN frequency, whose remaining service duration meets a first condition. The first cell includes a fixed earth cell or a quasi-fixed earth cell.

[0378] In some embodiments, the first condition includes: the remaining service duration of the cell is greater than a second threshold related to the service duration.

[0379] Figure 5 is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 5, the method involved in this embodiment is used in a communication system 100, and the method includes:

[0380] S501, The network device sends the first information to the terminal.

[0381] The optional implementations of step S501 can be found in step S201 of Figure 2, step S301 of Figure 3a, step S311 of Figure 3b, and the optional implementations of step S401 of Figure 4, as well as other related parts in the embodiments involved in Figures 2, 3a-3b, and 4, which will not be repeated here.

[0382] S502, the terminal performs cell reselection based on the first information.

[0383] The optional implementations of step S502 can be found in the optional implementations of step S202 in Figure 2, step S302 in Figure 3a, step S312 in Figure 3b, and other related parts in the embodiments involved in Figures 2, 3a and 3b, which will not be repeated here.

[0384] In some embodiments, the above methods may include the methods described in the embodiments of the communication system side, terminal side, network equipment side, core network equipment side, etc., which will not be repeated here.

[0385] In some embodiments, when the UE is in a high-speed mobile state, the NTN cell frequency point is set to high priority for reselection.

[0386] In some embodiments, the network side pre-sets the common priority of frequency points according to different mobility states of the user terminal and informs the UE via broadcast messages. When the UE is in a high-speed mobility state, the frequency point of the NTN cell has high priority. When the UE is in a high-speed mobility state, it will preferentially reselect to the NTN cell.

[0387] In some embodiments, the distance between the UE and the satellite cell reference point is compared to filter out satellite cells with longer service times.

[0388] In some embodiments, the distance d1 between the UE and the reference point of each cell is calculated, and a safe range with a radius of d2 is set based on the UE speed, the satellite cell coverage radius, and the remaining service time. Whether the UE is within the safe range is considered: if it is, it means the UE will remain in that cell for the remaining service time; if it is not, the UE's movement direction is further considered: if it is close to the reference point of the satellite cell, it means the UE will remain in that cell for the remaining service time; if it is far from the reference point of the satellite cell, it means the UE will leave that cell for the remaining service time.

[0389] This disclosure also provides an optional implementation that may include the following steps:

[0390] Step 1: Configure the UE on the network side during time period T CRmax The threshold N for the number of cell reselections within the cell. CR_H (This corresponds to the first threshold mentioned above). Exceeding this value indicates that the UE has entered a high-speed movement state (which corresponds to the first movement state mentioned above).

[0391] Step 2: The network side pre-sets the common priority of frequency points according to the different mobility status of user terminals and informs the UE through broadcast messages.

[0392] Alternatively, it is agreed through a protocol that the frequency priority of NTN in the high-speed movement state is the high priority. In some embodiments, if the UE is in the high-speed movement state, the frequency point of the NTN cell is the high priority at this time; otherwise, reselection continues according to the original solution.

[0393] Step 3: The UE obtains its own geographical location (latitude and longitude) and the rough movement direction through the Global Navigation Satellite System (GNSS) function.

[0394] Step 4: The UE receives the satellite cell information in SIB19, filters out the Earth fixed cell (which can correspond to the first cell in the above text), and obtains the remaining service duration of each satellite cell.

[0395] Step 5: The UE side sets the minimum service duration threshold t-service min (which can correspond to the second threshold in the above text), compares the remaining service duration of each NTN cell with t-service min and does not consider the satellite cells with values less than this value, and retains the satellite cells with values greater than this value (which can correspond to the second cell in the above text);

[0396] Step 6: For the satellite cells retained in Step 5, obtain the coverage radius r and the reference point location (referenceLocation) of each cell in SIB19.

[0397] In some embodiments, calculate the distance d1 between the UE and the reference point location of each cell, and set a safety range with a radius of d2 (which can correspond to the first area in the above text) according to the UE speed, the satellite cell coverage radius, and the remaining service duration, as shown in Figure 5b.

[0398] In some embodiments, d2 = r – v * t, where r is the satellite cell coverage radius, v is the UE speed, and t is the service duration provided by the satellite cell to the UE.

[0399] 1) If d1 < d2, it means that the UE is at a relatively central position in this satellite cell (i.e., within the range enclosed by the dotted line), and the movement direction of the UE does not need to be considered. The UE will not leave this cell within the remaining service duration of this satellite cell, and this satellite cell is retained (which can correspond to the third cell in the above text).

[0400] 2) If d1 > d2, it means that the UE is at the edge position of the cell (i.e., outside the range enclosed by the dotted line), and the movement direction of the UE relative to the reference point of this satellite cell needs to be considered:

[0401] ●If the UE is close to the satellite cell reference point, the UE will not leave the cell during the remaining service time of the cell, and the satellite cell will be reserved (which can correspond to the third cell mentioned above).

[0402] ●If the UE is far from the satellite cell reference point, the UE will leave the cell during the remaining service time of the cell and the satellite cell will not be considered.

[0403] In some embodiments, if d1 = d2, the satellite cell can be retained, or the satellite cell can be disregarded.

[0404] Step 7: Compare the remaining service duration of each retained satellite cell, and finally reselect the satellite cell that can provide the longest service duration for the UE.

[0405] Step 8: After reselecting to a new satellite cell, the UE scales the reselection parameters Treselection and Qhyst to adapt to the terminal's mobile state.

[0406] It should be noted that the UE can scale the reselection parameters Treselection and Qhyst based on the "speed-related scaling rules" mentioned above, which will not be elaborated here.

[0407] Compared to traditional cell reselection schemes for UEs in high-speed mobility, the scheme in this embodiment utilizes the wide coverage and minimal near-far effect of NTN cells, significantly reducing the number of cell reselections and avoiding power consumption from multiple measurements, thus meeting the energy-saving requirements of UEs in disconnected states. Furthermore, compared to traditional time- or distance-based NTN cell reselection schemes, the scheme in this embodiment prioritizes fixed Earth cells, fully utilizing the characteristic that satellite beams are fixed in their ground position for a period of time, and comprehensively considering service duration, distance, and UE motion status, resulting in a more rational selection of NTN cells.

[0408] This disclosure also provides an apparatus for implementing any of the above methods. For example, an apparatus is provided that includes units or modules for implementing the steps performed by the terminal in any of the above methods. Alternatively, another apparatus is provided that includes units or modules for implementing the steps performed by a network device (e.g., an access network device, a core network functional node, a core network device, etc.) in any of the above methods.

[0409] It should be understood that the division of units or modules in the above device is only a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, the units or modules in the device can be implemented by a processor calling software: for example, the device includes a processor connected to a memory containing instructions. The processor calls the instructions stored in the memory to implement any of the above methods or to implement the functions of the units or modules in the above device. The processor can be, for example, a general-purpose processor, such as a Central Processing Unit (CPU) or a microprocessor, and the memory can be internal or external to the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits. The functions of some or all of the units or modules can be achieved through the design of the hardware circuits. The aforementioned hardware circuits can be understood as one or more processors. For example, in one implementation, the aforementioned hardware circuit is an application-specific integrated circuit (ASIC). The functions of some or all of the aforementioned units or modules are achieved through the design of the logical relationships between the components within the circuit. As another example, in another implementation, the aforementioned hardware circuit can be implemented through a programmable logic device (PLD). Taking a field-programmable gate array (FPGA) as an example, it can include a large number of logic gates. The connection relationships between the logic gates are configured through configuration files, thereby achieving the functions of some or all of the aforementioned units or modules.

[0410] All units or modules of the above devices can be implemented entirely through processor-invoked software, entirely through hardware circuits, or partially through processor-invoked software with the remainder implemented through hardware circuits. In this embodiment, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction read and execute capabilities, such as a Central Processing Unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationships of hardware circuits. These logical relationships are fixed or reconfigurable. For example, the processor may be a hardware circuit implemented using an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document and configuring the hardware circuit can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be hardware circuits designed for artificial intelligence, which can be understood as ASICs, such as Neural Network Processing Units (NPUs), Tensor Processing Units (TPUs), and Deep Learning Processing Units (DPUs).

[0411] Figure 6a is a schematic diagram of the structure of a terminal proposed in an embodiment of this disclosure. As shown in Figure 6a, the terminal may include at least one of a first transceiver module 611, a first processing module 612, etc.

[0412] In some embodiments, the first transceiver module 611 is used to receive first information, the first information including: a first threshold related to the mobility state of the terminal, and / or, frequency point priorities corresponding to different mobility states of the terminal; the first processing module 612 is used to perform cell reselection according to the first information.

[0413] Optionally, the first transceiver module 611 is used to execute the steps related to transmitting and receiving signaling executed by the terminal 101 in any of the above methods, such as step S201 shown in Figure 2, which will not be described again here.

[0414] Optionally, the first processing module 612 is used to execute the storage-related steps performed by the terminal 101 in any of the above methods, such as step S203 shown in FIG2, which will not be described again here.

[0415] Figure 6b is a schematic diagram of the network device proposed in an embodiment of this disclosure. As shown in Figure 6b, the network device includes at least one of a second transceiver module 621, a second processing module 622, etc.

[0416] In some embodiments, the second transceiver module 621 is used to send first information to the terminal, the first information being used for cell reselection; wherein, the first information includes: a first threshold related to the mobility state of the terminal and frequency point priorities corresponding to different mobility states of the terminal.

[0417] In some embodiments, the second transceiver module 621 is used to send first information to the terminal, the first information being used for cell reselection; wherein, the first information includes: a first threshold related to the mobility state of the terminal.

[0418] Optionally, the second transceiver module 621 is used to execute the steps related to sending and receiving signaling performed by the network device 102 in any of the above methods, such as step S201 shown in Figure 2, which will not be described again here.

[0419] Figure 7a is a schematic diagram of the structure of the communication device 7100 proposed in an embodiment of this disclosure. The communication device 7100 can be a network device (e.g., access network device, core network device, etc.), a terminal (e.g., user equipment, etc.), a chip, chip system, or processor that supports the network device in implementing any of the above methods, or a chip, chip system, or processor that supports the terminal in implementing any of the above methods. The communication device 7100 can be used to implement the methods described in the above method embodiments; for details, please refer to the descriptions in the above method embodiments.

[0420] As shown in Figure 7a, the communication device 7100 includes one or more processors 7101. The processor 7101 can be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit (CPU). The baseband processor can be used to process communication protocols and communication data, while the CPU can be used to control communication devices (e.g., base stations, baseband chips, terminal devices, terminal device chips, DUs or CUs, etc.), execute programs, and process program data. The processor 7101 is used to invoke instructions to cause the communication device 7100 to execute any of the above methods.

[0421] In some embodiments, the communication device 7100 further includes one or more transceivers 7103. When the communication device 7100 includes one or more transceivers 7103, the transceiver 7103 performs at least one of the communication steps such as sending and / or receiving in the above-described method (e.g., step S201 shown in FIG. 2, but not limited thereto), and the processor 7101 performs at least one of other steps (e.g., at least one of steps S202 and S203 shown in FIG. 2, but not limited thereto). In optional embodiments, the transceiver may include a receiver and / or a transmitter, which may be separate or integrated together. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, interface, etc., can be used interchangeably; the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc., can be used interchangeably; and the terms receiver, receiving unit, receiver, receiving circuit, etc., can be used interchangeably.

[0422] In some embodiments, the communication device 7100 further includes one or more memories 7102 for storing instructions. Optionally, all or part of the memories 7102 may be located outside the communication device 7100.

[0423] In some embodiments, a transceiver may include a receiver and a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, etc., may be used interchangeably; the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc., may be used interchangeably; and the terms receiver, receiving unit, receiver, receiving circuit, etc., may be used interchangeably.

[0424] Optionally, the communication device 7100 further includes one or more interface circuits 7104, which are connected to the memory 7102. The interface circuits 7104 can be used to receive signals from the memory 7102 or other devices, and can be used to send signals to the memory 7102 or other devices. For example, the interface circuits 7104 can read instructions stored in the memory 7102 and send the instructions to the processor 7101.

[0425] The communication device 7100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 7100 described in this disclosure is not limited thereto, and the structure of the communication device 7100 may not be limited by FIG. 7a. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: (1) an independent integrated circuit IC, or chip, or chip system or subsystem; (2) a collection of one or more ICs, optionally, the IC collection may also include storage components for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, terminal device, smart terminal device, cellular phone, wireless device, handheld device, mobile unit, vehicle device, network device, cloud device, artificial intelligence device, etc.; (6) others, etc.

[0426] Figure 7b is a schematic diagram of the structure of the chip 7200 proposed in an embodiment of this disclosure. For cases where the communication device 7100 can be a chip or a chip system, please refer to the schematic diagram of the chip 7200 shown in Figure 7b, but it is not limited thereto.

[0427] Chip 7200 includes one or more processors 7201. Chip 7200 is used to perform any of the above methods.

[0428] In some embodiments, chip 7200 further includes one or more interface circuits 7202. Optionally, terms such as interface circuit, interface, and transceiver pin can be used interchangeably. In some embodiments, chip 7200 further includes one or more memories 7203 for storing data. Optionally, all or part of the memories 7203 may be located outside of chip 7200. Optionally, interface circuit 7202 is connected to memory 7203, and interface circuit 7202 can be used to receive data from memory 7203 or other devices, and interface circuit 7202 can be used to send data to memory 7203 or other devices. For example, interface circuit 7202 can read data stored in memory 7203 and send the data to processor 7201.

[0429] In some embodiments, the interface circuit 7202 performs at least one of the communication steps such as sending and / or receiving in the above-described method (e.g., step S201 shown in FIG. 2, but not limited thereto). The interface circuit 7202 performing the communication steps such as sending and / or receiving in the above-described method refers, for example, to the interface circuit 7202 performing data interaction between the processor 7201, the chip 7200, the memory 7203, or the transceiver device. In some embodiments, the processor 7201 performs at least one of other steps (e.g., at least one of steps S202 and S203 shown in FIG. 2, but not limited thereto).

[0430] This disclosure also provides a program product that, when executed by the communication device 7100, causes the communication device 7100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0431] This disclosure also proposes a computer program that, when run on a computer, causes the computer to perform any of the above methods.

[0432] The technical solutions described in the embodiments of this disclosure can be combined arbitrarily without conflict.

[0433] Other embodiments of the invention will readily occur to those skilled in the art upon 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 that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0434] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A communication method, characterized in that, The method is performed by a terminal, and the method includes: Receive first information, the first information including: a first threshold related to the mobility state of the terminal, and / or, frequency point priority corresponding to different mobility states of the terminal; Based on the first information, cell reselection is performed.

2. The method according to claim 1, characterized in that, The step of performing cell reselection based on the first information includes: Based on the first threshold, it is determined that the terminal is in a first moving state; Cell reselection is performed based on the priority of the NTN frequency determined by the first mobility state.

3. The method according to claim 1, characterized in that, The step of performing cell reselection based on the first information includes: Based on the first threshold, it is determined that the terminal is in a first moving state; Cell reselection is performed based on the priority of NTN frequencies as specified in the protocol.

4. The method according to claim 2 or 3, characterized in that, The first movement state is a high-speed movement state, and the NTN frequency has high priority.

5. The method according to claim 4, characterized in that, The cell reselection process includes: Based on the NTN frequency, a first cell is determined, which includes: a fixed earth cell or a quasi-fixed earth cell; Cell reselection is performed based on the second cell in the first cell whose remaining service time meets the first condition.

6. The method according to claim 5, characterized in that, The cell reselection based on the second cell in the first cell that meets the first condition in terms of remaining service time includes: The target cell is determined from the second cell according to the R criterion, and the cell is reselected to the target cell; or... Select the cell with the longest remaining service time from the second cell as the target cell, and reselect to the target cell.

7. The method according to claim 6, characterized in that, The step of selecting the cell with the longest remaining service time from the second cell as the target cell includes: The cells in the second cell that meet the second condition are designated as the third cell; The cell with the longest remaining service time in the third cell is identified as the target cell; The second condition includes: The terminal is located within the first area; or, The terminal is located outside the first area, and the distance between the terminal and the reference point of the cell decreases. The first region is determined based on the terminal's speed information, the cell's coverage information, and the remaining service time.

8. The method according to claim 7, characterized in that, If the distance between the terminal and the reference point of the cell is less than the coverage radius of the first area, then the terminal is located within the first area.

9. The method according to any one of claims 5-8, characterized in that, The first condition includes: the remaining service duration of the cell is greater than a second threshold related to the service duration.

10. The method according to any one of claims 5-9, characterized in that, The method further includes: Obtain the remaining service time for each cell in the first cell.

11. The method according to any one of claims 6-10, characterized in that, The method further includes: The reselection parameters of the target cell are scaled.

12. The method according to any one of claims 6-11, characterized in that, The method further includes: Obtain at least one of the following: The direction of movement of the terminal; The geographical location information of the terminal; Coverage information for each cell in the second cell; Reference points for each cell in the second cell.

13. A communication method, characterized in that, The method is performed by a network device, and the method includes: Send first information to the terminal, the first information being used for cell reselection; The first information includes: a first threshold related to the mobile state of the terminal, and / or the frequency priority corresponding to different mobile states of the terminal.

14. The method according to claim 13, characterized in that, The first threshold is used by the terminal to determine the first mobility state of the terminal. The cell reselection is performed by the terminal based on the priority of the NTN frequency determined by the first mobility state, or the cell reselection is performed by the terminal based on the priority of the NTN frequency specified in the protocol.

15. The method according to claim 14, characterized in that, The first movement state is a high-speed movement state, and the NTN frequency has high priority.

16. The method according to claim 15, characterized in that, The cell reselection is performed by the terminal on the second cell among the first cells determined by the NTN frequency, whose remaining service time meets the first condition. The first cell includes: a fixed earth cell or a quasi-fixed earth cell.

17. The method according to claim 16, characterized in that, The first condition includes: the remaining service duration of the cell is greater than a second threshold related to the service duration.

18. A communication device, characterized in that, The communication device is used to perform the communication method according to any one of claims 1-12 or any one of claims 13-17.

19. A communication system, characterized in that, include: A terminal and a network device, wherein the terminal is used to implement the method of any one of claims 1 to 12, and the network device is used to implement the method of any one of claims 13 to 17.

20. A computer storage medium, characterized in that, The computer-readable storage medium stores executable instructions that are loaded and executed by a processor to implement the method as claimed in any one of claims 1 to 12, or any one of claims 13 to 17.

21. A program product comprising at least one of a program and instructions, characterized in that, When at least one of the programs or instructions is executed by the communication device, it implements the steps of the method according to any one of claims 1-12 or 13-17.

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