Communication method, terminal, network device, communication system, and storage medium

Abstract

Embodiments of the present disclosure relate to a communication method, a terminal, a network device, a communication system, and a storage medium. The communication method can be applied to a terminal. The method comprises: receiving first information. The first information is used by the terminal to execute inter-frequency and / or inter-system cell reselection, and a target cell of said cell reselection is a non-terrestrial network (NTN) cell. Therefore, in the embodiments of the present disclosure, inter-frequency and / or inter-system cell reselection is achieved by means of first information suitable for an NTN, thereby improving reselection efficiency and performance of an NTN cell.

Description

Communication method, terminal, network device, communication system and storage medium Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular to a communication method, a terminal, a network device, a communication system, and a storage medium. Background Art

[0002] In the fifth-generation mobile communication technology, New Radio (NR), for terrestrial networks (TN) systems, terminals can perform cell reselection based on the S and R criteria. For non-terrestrial networks (NTN) systems, when the satellite moves relative to the ground, feeder link handover and service link handover occur, requiring terminals within the cell to reselect.

[0003] Summary of the Invention

[0004] During inter-frequency / inter-radio access technology (inter-RAT) cell reselection, if the target cell is an NTN cell, the terminal's dwell time on different satellites may vary significantly due to satellite mobility and the varying specifications of different satellite types. Therefore, it is necessary to configure NTN-appropriate cell reselection parameters for the terminal to support terminal mobility.

[0005] The embodiments of the present disclosure provide a communication method, a terminal, a network device, a communication system, and a storage medium.

[0006] According to a first aspect of an embodiment of the present disclosure, a communication method is proposed, which is executed by a terminal. The method includes: receiving first information, where the first information is used by the terminal to perform inter-frequency and / or inter-system cell reselection, and the target cell of the cell reselection is a non-terrestrial network NTN cell.

[0007] According to a second aspect of an embodiment of the present disclosure, a communication method is proposed, which is performed by a network device. The method includes: sending first information, where the first information is used by the terminal to perform inter-frequency and / or inter-system cell reselection, and the target cell of the cell reselection is a non-terrestrial network NTN cell.

[0008] According to a third aspect of an embodiment of the present disclosure, a terminal is proposed, comprising: a first transceiver module, configured to receive first information, wherein the first information is used by the terminal to perform inter-frequency and / or inter-system cell reselection, and the target cell of the cell reselection is a non-terrestrial network NTN cell.

[0009] According to a fourth aspect of an embodiment of the present disclosure, a network device is proposed, including: a second transceiver module, configured to send first information, wherein the first information is used by the terminal to perform inter-frequency and / or inter-system cell reselection, and the target cell of the cell reselection is a non-terrestrial network NTN cell.

[0010] According to a fifth aspect of an embodiment of the present disclosure, a terminal is proposed, comprising: one or more processors; wherein a core network device is used to execute the communication method as in the first aspect.

[0011] According to a sixth aspect of an embodiment of the present disclosure, a network device is proposed, comprising: one or more processors; wherein the terminal is used to execute the communication method as in the second aspect.

[0012] According to a seventh aspect of an embodiment of the present disclosure, a communication system is proposed, including a terminal and a network device, wherein the terminal is configured to implement the communication method as in the first aspect, and the network device is configured to implement the communication method as in the second aspect.

[0013] According to an eighth aspect of an embodiment of the present disclosure, a storage medium is proposed, which stores instructions. When the instructions are executed on a network device or terminal, the network device or terminal executes the communication method of the first and second aspects.

[0014] The embodiments of the present disclosure implement inter-frequency and / or inter-system cell reselection through first information applicable to NTN, thereby improving the cell reselection efficiency and performance of NTN cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings required for describing the embodiments are introduced. The following drawings are merely some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0016] FIG1A is a schematic diagram showing an architecture of a communication system according to an embodiment of the present disclosure.

[0017] FIG1B is a schematic diagram of a satellite communication system architecture based on transparent transmission payload according to an embodiment of the present disclosure.

[0018] FIG1C is a schematic diagram of a satellite communication system based on regenerative payload according to an embodiment of the present disclosure.

[0019] FIG2 is an exemplary interaction diagram of a communication method according to an embodiment of the present disclosure.

[0020] FIG3A is a schematic diagram showing an implementation flow of a terminal executing a communication method according to an embodiment of the present disclosure.

[0021] FIG3B is a schematic diagram showing an implementation flow of a network device executing a communication method according to an embodiment of the present disclosure.

[0022] FIG4 is another schematic diagram of a flow chart showing a terminal executing a communication method according to an embodiment of the present disclosure.

[0023] FIG5A is a schematic structural diagram of a terminal proposed in an embodiment of the present disclosure.

[0024] FIG5B is a schematic structural diagram of a network device proposed in an embodiment of the present disclosure.

[0025] FIG6 is a schematic structural diagram of a communication device proposed in an embodiment of the present disclosure.

[0026] FIG7 is a schematic diagram of a structure of a chip proposed in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] The embodiments of the present disclosure provide a communication method, a terminal, a network device, a communication system, and a storage medium.

[0028] In a first aspect, an embodiment of the present disclosure proposes a communication method executed by a terminal, the method comprising: receiving first information, the first information being used by the terminal to perform inter-frequency and / or inter-system cell reselection, the target cell of the cell reselection being a non-terrestrial network NTN cell.

[0029] In the embodiments of the present disclosure, inter-frequency and / or inter-system cell reselection is implemented through the first information applicable to NTN, thereby improving the cell reselection efficiency and performance of NTN cells.

[0030] In combination with some embodiments of the first aspect, in some embodiments, the first information includes at least one of the following: a first parameter associated with time, the first parameter being used to indicate the length of the cell reselection timer of the NTN cell; and a second parameter associated with the moving speed of the terminal, the second parameter being used to determine the length of the cell reselection timer of the NTN cell.

[0031] In conjunction with some embodiments of the first aspect, in some embodiments, the second parameter is used to determine the value of the first parameter

[0032] In conjunction with some embodiments of the first aspect, in some embodiments, the second parameter is used to reduce or amplify the value of the first parameter.

[0033] In combination with some embodiments of the first aspect, in some embodiments, the first information is carried in system information.

[0034] In combination with some embodiments of the first aspect, in some embodiments, the first information is configured based on at least one of the following: NTN network; frequency of the NTN cell; satellite to which the NTN cell belongs; type of satellite to which the NTN cell belongs; orbital altitude of the satellite to which the NTN cell belongs.

[0035] In the embodiment of the present disclosure, the first information is configured based on different information of the NTN cell, thereby improving the efficiency and performance of the terminal in performing NTN cell reselection.

[0036] In combination with some embodiments of the first aspect, in some embodiments, the corresponding first information is determined according to the reselected cell.

[0037] In the embodiment of the present disclosure, the network device can send multiple first information, and the terminal can determine the corresponding first information according to the reselected cell and perform cell reselection based on the corresponding first information, thereby improving the efficiency and performance of cell reselection.

[0038] In combination with some embodiments of the first aspect, in some embodiments, determining the corresponding first information according to the reselected cell includes at least one of the following: determining the corresponding first information according to the reselected cell being an NTN cell; determining the corresponding first information according to the frequency of the reselected cell; determining the corresponding first information according to the satellite to which the reselected cell belongs; determining the corresponding first information according to the type of the satellite to which the reselected cell belongs; and determining the corresponding first information according to the orbital altitude of the satellite to which the reselected cell belongs.

[0039] In the embodiment of the present disclosure, the corresponding first information is determined based on different information of the reselected cell, thereby improving the efficiency and performance of the terminal in performing NTN cell reselection.

[0040] In a second aspect, an embodiment of the present disclosure proposes a communication method, which is executed by a network device. The method includes: sending first information, where the first information is used by the terminal to perform inter-frequency and / or inter-system cell reselection, and the target cell of the cell reselection is a non-terrestrial network NTN cell.

[0041] In combination with some embodiments of the second aspect, in some embodiments, the first information includes at least one of the following: a first parameter associated with time, the first parameter being used to indicate the length of the cell reselection timer of the NTN cell; a second parameter associated with the moving speed of the terminal, the second parameter being used to determine the length of the cell reselection timer of the NTN cell.

[0042] In conjunction with some embodiments of the second aspect, in some embodiments, the second parameter is used to determine the value of the first parameter

[0043] In conjunction with some embodiments of the second aspect, in some embodiments, the second parameter is used to reduce or amplify the value of the first parameter.

[0044] In combination with some embodiments of the second aspect, in some embodiments, the first information is carried in the system information.

[0045] In combination with some embodiments of the second aspect, in some embodiments, the first information is configured based on at least one of the following: NTN network; frequency of the NTN cell; satellite to which the NTN cell belongs; type of satellite to which the NTN cell belongs; orbital altitude of the satellite to which the NTN cell belongs.

[0046] In a third aspect, an embodiment of the present disclosure proposes a terminal, comprising: a first transceiver module, configured to receive first information, wherein the first information is used by the terminal to perform inter-frequency and / or inter-system cell reselection, and the target cell of the cell reselection is a non-terrestrial network NTN cell.

[0047] In combination with some embodiments of the third aspect, in some embodiments, the first information includes at least one of the following: a first parameter associated with time, the first parameter being used to indicate the length of the cell reselection timer of the NTN cell; and a second parameter associated with the moving speed of the terminal, the second parameter being used to determine the length of the cell reselection timer of the NTN cell.

[0048] In conjunction with some embodiments of the third aspect, in some embodiments, the second parameter is used to determine the value of the first parameter

[0049] In conjunction with some embodiments of the third aspect, in some embodiments, the second parameter is used to reduce or amplify the value of the first parameter.

[0050] In combination with some embodiments of the third aspect, in some embodiments, the first information is carried in the system information.

[0051] In combination with some embodiments of the third aspect, in some embodiments, the first information is configured based on at least one of the following: NTN network; frequency of the NTN cell; satellite to which the NTN cell belongs; type of satellite to which the NTN cell belongs; orbital altitude of the satellite to which the NTN cell belongs.

[0052] In combination with some embodiments of the third aspect, in some embodiments, the first transceiver module is further configured to determine corresponding first information according to the reselected cell.

[0053] In combination with some embodiments of the third aspect, in some embodiments, the first transceiver module is further configured to determine the corresponding first information based on at least one of the following: determining the corresponding first information based on the reselected cell being an NTN cell; determining the corresponding first information based on the frequency of the reselected cell; determining the corresponding first information based on the satellite to which the reselected cell belongs; determining the corresponding first information based on the type of satellite to which the reselected cell belongs; and determining the corresponding first information based on the orbital altitude of the satellite to which the reselected cell belongs.

[0054] In a fourth aspect, an embodiment of the present disclosure proposes a network device, including: a second transceiver module, configured to send first information, wherein the first information is used by the terminal to perform inter-frequency and / or inter-system cell reselection, and the target cell of the cell reselection is a non-terrestrial network NTN cell.

[0055] In combination with some embodiments of the fourth aspect, in some embodiments, the first information includes at least one of the following: a first parameter associated with time, the first parameter being used to indicate the length of the cell reselection timer of the NTN cell; a second parameter associated with the moving speed of the terminal, the second parameter being used to determine the length of the cell reselection timer of the NTN cell.

[0056] In conjunction with some embodiments of the fourth aspect, in some embodiments, the second parameter is used to determine the value of the first parameter

[0057] In conjunction with some embodiments of the fourth aspect, in some embodiments, the second parameter is used to reduce or amplify the value of the first parameter.

[0058] In combination with some embodiments of the fourth aspect, in some embodiments, the first information is carried in the system information.

[0059] In combination with some embodiments of the fourth aspect, in some embodiments, the first information is configured based on at least one of the following: NTN network; frequency of the NTN cell; satellite to which the NTN cell belongs; type of satellite to which the NTN cell belongs; orbital altitude of the satellite to which the NTN cell belongs.

[0060] In a fifth aspect, an embodiment of the present disclosure proposes a terminal, comprising: one or more processors; wherein the core network device is used to execute the communication method as in the first aspect.

[0061] In a sixth aspect, an embodiment of the present disclosure proposes a network device, comprising: one or more processors; wherein the terminal is used to execute the communication method as in the second aspect.

[0062] In the seventh aspect, an embodiment of the present disclosure proposes a communication system, comprising: a terminal and a network device; wherein the terminal is configured to execute the method described in the optional implementation manner of the first aspect, and the network device is configured to execute the method described in the optional implementation manner of the second aspect.

[0063] In an eighth aspect, an embodiment of the present disclosure proposes a storage medium, wherein the storage medium stores instructions. When the instructions are executed on a network device or terminal, the network device or terminal executes the method described in the optional implementation of the first and second aspects.

[0064] In a ninth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a network device or a terminal, the network device or the terminal executes the method described in the optional implementation of the first and second aspects.

[0065] In a tenth aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first and second aspects.

[0066] In an eleventh aspect, an embodiment of the present disclosure provides a chip or a chip system, wherein the chip or chip system includes a processing circuit configured to execute the method described in the optional implementation of the first and second aspects above.

[0067] It is understandable that the above-mentioned terminals, network devices, communication systems, storage media, program products, computer programs, chips, or chip systems are all used to perform the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here.

[0068] The present disclosure provides a communication method, terminal, network device, communication system, and storage medium. In some embodiments, the terms communication method, information processing method, parameter configuration method, cell reselection method, etc., are interchangeable, and the terms information processing system, communication system, etc. are interchangeable.

[0069] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain 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 certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0070] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0071] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0072] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0073] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0074] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0075] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0076] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0077] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different; for another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0078] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0079] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0080] In some embodiments, terms such as "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 less than", and "above" can be replaced with each other, and terms such as "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" can be replaced with each other.

[0081] 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", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

[0082] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0083] In some embodiments, the terms "network devices", "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station" "fixed station", "node", "access network node", "access point", "transmission point (TP)", "reception point (RP)", "transmission and / or reception point (TRP)" "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femtocell", "picocell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)" and the like may be used interchangeably.

[0084] 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, client, etc. can be used interchangeably.

[0085] In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced by communication between multiple terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it is also possible to set the structure in which the terminal has all or part of the functions of the access network device. In addition, terms such as "uplink" and "downlink" can also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can be replaced by side channels, and uplinks, downlinks, etc. can be replaced by side links.

[0086] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may have a structure that has all or part of the functions of the terminal.

[0087] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0088] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0089] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0090] As shown in FIG1A , FIG1A is a schematic diagram illustrating an architecture of a communication system according to an embodiment of the present disclosure. The communication system 100 includes a terminal 101 and a network device 102 .

[0091] In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0092] In some embodiments, the network device 102, for example, is a node or device that accesses a terminal to a wireless network, and may include at least one of an evolved node B (eNB), a next generation eNB (ng-eNB), a next generation node B (gNB), a node B (NB), a home node B (HNB), a home evolved node B (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and an access node in a Wi-Fi system, but is not limited thereto.

[0093] In some embodiments, the technical solution of the present disclosure can be applied to the open radio access network (Open RAN) architecture. In this case, the interfaces between access network devices or within access network devices involved in the embodiments of the present disclosure can be transformed into internal interfaces of Open RAN, and the processes and information interactions between these internal interfaces can be implemented through software or programs.

[0094] In some embodiments, the network device can be composed of a centralized unit (CU) and a distributed unit (DU), where the CU can also be called a control unit. The CU-DU structure can be used to split the protocol layer of the access network device, with the functions of some protocol layers centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers distributed in the DU, which is centrally controlled by the CU, but is not limited to this.

[0095] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0096] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1A , or some of the entities in the communication system 100 , but are not limited thereto. The entities shown in FIG1A are illustrative only. The communication system 100 may include all or some of the entities shown in FIG1A , or may include other entities other than those shown in FIG1A . The number and form of the entities are arbitrary. The entities may be physical or virtual. The connection relationships between the entities are illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0097] The embodiments of the present disclosure may be applied to long term evolution (LTE), LTE-advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, international mobile telecommunications-advanced (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 (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.17 (WiMAX (registered trademark)), IEEE 802.18 (WiMAX (registered trademark)), IEEE 802.19 (WiMAX (registered trademark)), IEEE 802.20 (WiMAX (registered trademark)), IEEE 802.21 (WiMAX (registered trademark)), IEEE 802.22 (WiMAX (registered trademark)), IEEE 802.23 (WiMAX (registered trademark)), IEEE 802.24 (WiMAX (registered trademark)), IEEE 802.25 (WiMAX (registered trademark)), IEEE 802.26 (WiMAX (registered trademark)), IEEE 802.27 (WiMAX (registered trademark)), IEEE 802.28 (WiMAX (registered trademark)), IEEE 802.29 (WiMAX (registered trademark)), IEEE 802.30 (WiMAX (registered trademark)), IEEE 802.31 (WiMAX (registered trademark)), IEEE 802.32 (WiMAX (registered trademark)), IEEE 802.33 (WiMAX (reg 802.20, ultra-wideband (UWB), Bluetooth (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 communication methods, and next-generation systems based on and extending these methods. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0098] The various embodiments of the present disclosure may be applicable to non-terrestrial networks (NTNs), including networks or network segments that utilize transmission equipment, relay nodes, or base stations carried on airborne or space vehicles, and any network involving non-terrestrial flying objects. For example, NTNs may include satellite communication networks and high altitude platform systems (HAPs).

[0099] In some embodiments, according to the satellite altitude, that is, the satellite orbit altitude, the satellite system can be divided into highly elliptical orbit (HEO) satellites, geostationary earth orbit (GEO) satellites, medium earth orbit (MEO) satellites and low earth orbit (LEO) satellites.

[0100] As an example, the mechanism for GEO satellites and LEO satellites to provide coverage cells is described as follows:

[0101] 1. GEO satellites: Also known as geostationary satellites, these satellites move at the same speed as the Earth's rotational system, remaining stationary relative to the Earth. Consequently, the GEO satellite's cell is also stationary. GEO satellite cells offer a wide coverage area, typically with a diameter of 500 km.

[0102] 2. LEO Satellites: There are many types of non-geostationary satellites, taking LEO satellites as an example. LEO satellites move relatively quickly relative to the ground, at approximately 7 km / s, so the coverage area they provide also moves. The cells projected by LEO satellites on the ground can be of two types: fixed cells and moving cells.

[0103] In some embodiments, the communication link between the satellite and the terminal may be referred to as a service link, and the communication link between the satellite and the ground station may be referred to as a feeder link.

[0104] In some embodiments, the satellite communication network may have two different architectures: a satellite communication network architecture based on transparent payloads (i.e., transparent mode) and a satellite communication network architecture based on regenerative payloads (i.e., regenerative mode).

[0105] In some embodiments, as shown in Figure 1B, Figure 1B is a schematic diagram illustrating a satellite communication system architecture based on transparent transmission payloads according to an embodiment of the present disclosure. In this satellite communication system architecture, the core network is described as a 5GC. Of course, the core network can also be an EPC or other evolved versions of the core network, which is not specifically limited in this embodiment of the present disclosure. In transparent transmission mode, gNB 20 is deployed on the ground, and satellite 10 performs the radio frequency functions of gNB 20.

[0106] In some embodiments, as shown in FIG1C , FIG1C is a schematic diagram illustrating a satellite communication system architecture based on a regenerative payload according to an embodiment of the present disclosure. In this satellite communication system architecture, the core network is still described as a 5GC. Of course, the core network can also be an EPC or other evolved versions of the core network, which is not specifically limited in this embodiment of the present disclosure. In regenerative mode, at least gNB 20 is deployed on satellite 10.

[0107] In some embodiments, handling discontinuous coverage of the service link when the satellite is in transparent transmission mode may include enhancing terminal mobility and power saving techniques when the satellite provides discontinuous coverage. However, when the satellite is in regeneration mode, handling discontinuous coverage of the feeder link has not yet been technically clarified to support terminal services.

[0108] Cell reselection refers to the process in which a terminal device monitors the signal quality of neighboring cells and the current serving cell in idle mode to select the best cell to provide service signals.

[0109] In some embodiments, the cell reselection process may include the steps of:

[0110] In step A1, the terminal device measures the current serving cell and neighboring cells (including cells of different frequencies and systems) according to the measurement start criteria.

[0111] In some embodiments, the measurement start criteria: whether to start measurement of the neighboring cell can consider two parameters, namely the cell priority of the neighboring cell and the signal quality of the current serving cell. If the cell priority of the neighboring cell is higher than that of the current serving cell, the terminal device unconditionally starts the measurement of the neighboring cell. If the cell priority of the neighboring cell is less than or equal to the current serving cell. The terminal device can measure the signal quality of the current serving cell and compare the signal quality of the current serving cell with the quality threshold. If the signal quality of the current serving cell is higher than the quality threshold, the neighboring cell may not be measured. If the signal quality of the current serving cell is not higher than the quality threshold, the neighboring cell is measured.

[0112] Step A2: The terminal device determines whether the neighboring cell signal meets the reselection criteria.

[0113] In some embodiments, the reselection criteria between frequencies / systems of different priorities are as follows:

[0114] In the first case, the cell priority of the inter-frequency / inter-system (inter-radio access technology, inter-RAT) neighboring cell is higher than the cell priority of the serving cell.

[0115] If the serving cell carries a serving cell threshold value in the system information, such as threshServingLowQ, where threshServingLowQ is the serving cell threshold value when reselecting to a low-priority cell, the terminal triggers reselection when the following conditions are met: the terminal stays in the serving cell for more than a preset time (for example, 1 second); within a time interval (such as Treselection RAT ) in the neighboring area, the signal quality is greater than the signal quality threshold (such as Squal>Thresh X,HighQ ).

[0116] If the serving cell does not carry threshServingLowQ in the system information, the terminal triggers reselection when the following conditions are met: the terminal stays in the serving cell for more than a preset time (for example, 1 second); RAT ) in the neighboring area, the signal energy is greater than the signal energy threshold (such as Srxlev>Thresh X,HighP ).

[0117] Among them, Squal is the signal quality, Thresh X,HighQ is the signal quality threshold, Srxlev is the signal energy, Thresh X,HighP is the signal energy threshold. X,HighQ and Thresh X,HighP It is the threshold value for reselecting a cell when reselecting a high-priority cell, where X represents a frequency, and each frequency has a corresponding threshold value.

[0118] In some embodiments, the above threshold value can be obtained from system information. In one example, the Threshold of the neighboring cell with different frequencies X,HighQ and Thresh X,HighP and Thresh in neighboring areas of different systems X,HighQ and Thresh X,HighP Can be obtained from system messages.

[0119] In some embodiments, Srxlev and Squal may satisfy the following formulas (1) and (2): Srxlev = Q rxlevmeas -(Q rxlevmin +Qrxlevminoffset )-P compensation -Qoffset temp (1) Squal=Q qualmeas -(Q qualmin +Q qualminoffset )-Qoffset temp (2)

[0120] Among them, Q rxlevmeas The measured cell received signal level value, such as the reference signal received power (RSRP).

[0121] Q rxlevmin It is the minimum reception level value of the cell broadcast in system information block 1 (SIB1) and can be configured through the parameter CellSel.QRxLevMin.

[0122] Q rxlevminoffset This is the minimum received signal level offset for the cell broadcast in SIB1. It can be configured using the parameter CellSel.QRxLevMinOffset.

[0123] P compensation =max(P Max -UE Maximum Output Power, 0). PMax is the maximum transmit power allowed by the cell, as broadcasted in SIB1, and can be configured using the parameter CELL.UePowerMax. UE Maximum Output Power is the maximum RF output power capability of the UE itself.

[0124] Q qualmeas is the measured cell received signal quality, ie, reference signal received quality (RSRQ).

[0125] Q qualmin It is the minimum received signal quality value of the cell broadcast in SIB1 and can be configured through the parameter CellSel.QQualMin.

[0126] Q qualminoffset It is the minimum received signal quality offset value of the cell broadcast in SIB1 and can be configured through the parameter CellSel.QQualMinOffset.

[0127] For Srxlev and Squal, please refer to the relevant description in TS38.304 section 5.2.3.2 of the 3GPP protocol, which will not be further described here.

[0128] In the second case, the cell priority of the inter-frequency / inter-system neighboring cell is equal to the cell priority of the current serving cell.

[0129] The terminal device can calculate an R (Rank) value for each neighboring cell and the current serving cell based on the cell signal quality, and then sort them according to the R value. Cells with R values ​​greater than the current serving cell meet the reselection criteria. If there are multiple cells that meet the criteria, the best one is selected. RAT ) The neighboring cell in the serving cell always meets the R criterion, and the terminal device resides in the current serving cell for more than a preset time (for example, 1 second). The terminal device initiates reselection to the neighboring cell.

[0130] In some embodiments, the R value Rs of the serving cell may conform to the following formula, or the R value Rs of the serving cell may be determined by the following formula: s =Q meas,s +Qhyst-Qoffset temp ;

[0131] Among them, Q meas,s The signal quality of the current serving cell can be measured by the terminal device.

[0132] Q hyst is the reselection hysteresis value of the current serving cell. hyst The larger the value, the larger the boundary of the serving cell, and the lower the probability of reselecting to a neighboring cell.

[0133] Qoffset is a parameter for calculating the R criterion. In the case of inter-frequency reselection, Qoffset can be equal to the sum of QoffsetCell and QoffsetFreq, which can be obtained from SIB4.

[0134] Qoffset temp Parameters for calculating the R criterion can be obtained from SIB1.

[0135] The R value Rn of the neighboring cell can conform to the following formula, or the R value Rn of the neighboring cell can be determined by the following formula: n =Q meas,n -Qoffset-Qoffset temp ;

[0136] Among them, Q meas,n It is the signal quality of the neighboring cell, which can be measured by the terminal equipment.

[0137] The R value R of the serving cell s and the R value R of the neighboring cell n Reference can be made to the relevant descriptions in TS38.304 of the 3GPP protocol, and no further elaboration will be provided here.

[0138] In the third case, the cell priority of the inter-frequency / inter-system (inter radio access technology, inter-RAT) neighboring cell is lower than that of the current serving cell.

[0139] If the serving cell carries the serving cell threshold value, such as threshServingLowQ, in the system information, the terminal triggers reselection when the following conditions are met: neighboring cells with a cell priority higher than that of the serving cell do not meet the corresponding reselection criteria; neighboring cells with a cell priority equal to that of the serving cell do not meet the corresponding reselection criteria; the serving cell satisfies Squal < ThreshServing,LowQ; the neighboring cell satisfies Squal > Thresh during the time interval (such as Treselection RAT ); the terminal has resided in the current serving cell for more than a preset duration (for example, 1 second). X,LowQ ; the terminal has resided in the current serving cell for more than a preset duration (for example, 1 second).

[0140] If the serving cell does not carry threshServingLowQ in the system information, the terminal triggers reselection when the following conditions are met: neighboring cells with a cell priority higher than that of the serving cell do not meet the corresponding reselection criteria; neighboring cells with a cell priority equal to that of the current serving cell do not meet the corresponding reselection criteria; the serving cell satisfies Squal < ThreshServing,LowQ; the neighboring cell satisfies Srxlev > Thresh during the time interval (Treselection RAT ); the terminal device has resided in the current serving cell for more than a preset duration (for example, 1 second). X,LowP ; the terminal device has resided in the current serving cell for more than a preset duration (for example, 1 second).

[0141] Among them, ThreshServing,LowQ and Thresh X,LowQ are the reselection threshold values corresponding to neighboring cells with a cell priority lower than that of the serving cell. Among them, X can represent frequency, and each frequency has a corresponding threshold.

[0142] Step A3, if the neighboring cell meets the reselection criteria, reselection is initiated. The terminal device receives the system message of this neighboring cell. If there is no access restriction (for example, the operator may have some reserved cells or cells with access restrictions), etc., it resides in this neighboring cell. If the neighboring cell does not meet the reselection criteria, it remains in the current serving cell.

[0143] During inter-frequency / inter-system cell reselection, if the target cell is an NTN cell, the terminal's residence time on different satellites may vary greatly due to satellite mobility and the different indicators of different satellite types. Therefore, it is necessary to configure cell reselection parameters suitable for NTN cells for the terminal to support terminal mobility.

[0144] FIG2 is a first interaction diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG2 , an embodiment of the present disclosure relates to a communication method. The communication method includes steps S201 to S203.

[0145] In the embodiments of the present disclosure, description is given by taking an example where the first information is used by a terminal to perform cell reselection from a first network to a second network.

[0146] In one example, the first network may be E-UTRAN TN, and the second network may be NR NTN. In this case, the first information is used by the terminal to perform cell reselection from E-UTRAN TN to NR NTN.

[0147] In one example, the first network may be NR TN, and the second network may be NR NTN. In this case, the first information is used by the terminal to perform cell reselection from NR TN to NR NTN.

[0148] The following description is made by taking the example of the first information being used by the terminal to perform cell reselection from E-UTRAN TN to NR NTN.

[0149] In step S201, the network device sends first information.

[0150] In some embodiments, the terminal receives first information.

[0151] In some embodiments, the first information is used by the terminal to perform inter-frequency and / or inter-system cell reselection. In this case, the target cell for cell reselection is an NR NTN cell.

[0152] In some embodiments, the first information includes at least one of a first parameter associated with time and a second parameter associated with a moving speed of the terminal.

[0153] In some embodiments, the terminal may perform cell reselection within a time window indicated by the first parameter.

[0154] In some embodiments, the terminal may evaluate whether the cell reselection criterion is met within a timer duration or a time window indicated by the first parameter.

[0155] In some embodiments, the second parameter is used to determine the value of the first parameter. In some embodiments, the second parameter being used to determine the value of the first parameter can be understood as the second parameter being used to adjust the value of the first parameter. In some embodiments, the second parameter being used to determine the value of the first parameter can be understood as the second parameter being used to reduce the value of the first parameter. In some embodiments, the second parameter being used to determine the value of the first parameter can be understood as the second parameter being used to amplify the value of the first parameter. Of course, the adjustment can also be understood as reduction and / or increase, which is not specifically limited in the present embodiment.

[0156] In some embodiments, the terminal performs cell reselection within a time window indicated by the value of the first parameter adjusted by the second parameter.

[0157] In some embodiments, the terminal evaluates whether the cell reselection criterion is met within a timer duration or a time window indicated by the value of the first parameter adjusted by the second parameter.

[0158] In some embodiments, the first parameter and the second parameter may be used for cell reselection of the NR NTN cell. In this case, the first parameter may be used to indicate the cell reselection timer duration of the NR NTN cell. In one example, the first parameter may be recorded as Treselection NR_NTN The second parameter can be used to determine the cell reselection timer duration of the NTN cell. In one example, the second parameter can be recorded as SpeedStateScaleFactors NR_NTN .

[0159] In one example, when the terminal is in a high-mobility state, the second parameter is sf-High NTN .

[0160] In one example, when the terminal is in a medium-mobility state, the second parameter is sf-Medium NTN .

[0161] In one example, when the terminal is in a high mobility state, the second parameter (sf-High NR_NTN ), to adjust the first parameter (Treselection NR_NTN ) value.

[0162] In some embodiments, the first parameter and the second parameter may also be used in other communication systems supporting satellite access. It is understood that the first parameter and the second parameter may be specifically used for cell reselection of an NTN cell.

[0163] In some embodiments, the first parameter or the second parameter may be a parameter used for cell reselection of an NR cell in an existing protocol. In one example, the first parameter may be Treselection NR In one example, the second parameter may be SpeedStateScaleFactors NR .

[0164] In some embodiments, the first parameter or the second parameter may also be a parameter used by other communication systems in existing protocols for cell reselection. Therefore, it is understandable that the first parameter or the second parameter may be a parameter used by other communication systems in existing protocols for cell reselection.

[0165] In some embodiments, the first information may include a first parameter and a second parameter. In this case, the first parameter and the second parameter may be dedicated to cell reselection of the NR NTN cell. Alternatively, one of the first parameter and the second parameter is dedicated to cell reselection of the NR NTN cell, and the other is used for cell reselection of the NR cell.

[0166] In one example, the first parameter is Treselection NR_NTN The second parameter is SpeedStateScaleFactors NR_NTN , at this time the first information includes Treselection NR_NTN and SpeedStateScaleFactors NR_NTN The first parameter and the second parameter are dedicated to the UE reselecting to the NR NTN cell.

[0167] In one example, the first parameter is Treselection NR The second parameter is SpeedStateScaleFactors NR_NTN , at this time the first information includes Treselection NR and SpeedStateScaleFactors NR_NTN . Among them, the first parameter is used for UE to reselect to NR NTN and NR TN cells, and the second parameter is dedicated to UE to reselect to NR NTN cells.

[0168] In one example, the first parameter is Treselection NR_NTN The second parameter is SpeedStateScaleFactors NR , at this time the first information includes Treselection NR_NTN and SpeedStateScaleFactors NR. Among them, the first parameter is dedicated to the UE reselecting to the NR NTN cell, and the second parameter is used for the UE to reselect to the NR NTN and NR TN cells.

[0169] In some embodiments, the second parameter may be used by the terminal to adjust the value of the first parameter.

[0170] In one example, the terminal can multiply the SpeedStateScaleFactors by NR_NTN , to adjust Treselection NR_NTN The value of .

[0171] In one example, the terminal can multiply the SpeedStateScaleFactors by NR_NTN , to adjust Treselection NR The value of .

[0172] In one example, the terminal can multiply the SpeedStateScaleFactors by NR , to adjust Treselection NR_NTN The value of .

[0173] In some embodiments, the first information may include only the first parameter. In this case, the first parameter may be dedicated to cell reselection of the NR NTN cell.

[0174] In one example, the first parameter is Treselection NR_NTN , the first information only includes Treselection NR_NTN .

[0175] In some embodiments, the second parameter may be used by the network device to adjust the value of the first parameter. In this case, the first information may only include the first parameter, and the value of the first parameter is the value adjusted by the second parameter.

[0176] In one example, a network device can multiply the SpeedStateScaleFactors by NR , to adjust Treselection NR_NTN The value of .

[0177] In some embodiments, the first information may include only the second parameter. In this case, the second parameter may be dedicated to cell reselection of the NR NTN cell. Alternatively, the second parameter may be used for cell reselection of the NR cell.

[0178] In one example, the second parameter is SpeedStateScaleFactors NR_NTN , the first information only includes SpeedStateScaleFactorsNR_NTN .

[0179] In some embodiments, the second parameter may be used by a terminal or a network device to adjust the value of the first parameter.

[0180] In one example, a terminal or network device can multiply the SpeedStateScaleFactors by NR_NTN , to adjust Treselection NR The value of Treselection NR_NTN The value of .

[0181] In some embodiments, the first information is carried in system information. In one example, the system information is SIB24, or SystemInformationBlockType24.

[0182] In some embodiments, the first information is configured based on at least one of the following: an NTN network, a frequency of an NTN cell, a satellite to which the NTN cell belongs, a type of satellite to which the NTN cell belongs, and an orbital altitude of the satellite to which the NTN cell belongs.

[0183] In some embodiments, different first information is configured based on different NTN networks. In one example, different first parameters (Treselection NR_NTN ) and / or the second parameter (SpeedStateScaleFactors NR_NTN ).

[0184] In some embodiments, different first information is configured based on different frequencies of the NTN cell. In one example, different first parameters (Treselection NR_NTN ) and / or the second parameter (SpeedStateScaleFactors NR_NTN ).

[0185] In some embodiments, different first information is configured based on different satellites to which the NTN cell belongs. In one example, different first parameters (Treselection NR_NTN ) and / or the second parameter (SpeedStateScaleFactors NR_NTN ).

[0186] In some embodiments, different first information is configured based on different types of satellites to which the NTN cell belongs. In one example, different first parameters (Treselection NR_NTN) and / or the second parameter (SpeedStateScaleFactors NR_NTN ).

[0187] In some embodiments, different first information is configured based on different orbital heights of satellites belonging to the NTN cells. In one example, different first parameters (Treselection NR_NTN ) and / or the second parameter (SpeedStateScaleFactors NR_NTN ).

[0188] In step S202, the terminal determines corresponding first information according to the reselected cell.

[0189] In some embodiments, the terminal determines the corresponding first information according to the reselected cell being an NTN cell.

[0190] In one example, the first information includes a first parameter (Treselection NR_NTN ) and the second parameter (SpeedStateScaleFactors NR_NTN ), the terminal determines that the timer length for performing cell reselection corresponding to the NTN cell is Treselection NR_NTN , or based on the NTN cell, the corresponding timer duration for performing cell reselection can be determined as: SpeedStateScaleFactors NR_NTN Multiply by Treselection NR_NTN The value after.

[0191] In one example, the first information only includes the first parameter (Treselection NR_NTN ), the terminal can determine the corresponding timer length for performing cell reselection based on the NTN cell as Treselection NR_NTN , or based on the NTN cell, the corresponding timer duration for performing cell reselection can be determined as: SpeedStateScaleFactors NR Multiply by Treselection NR_NTN The value after.

[0192] In one example, the first information only includes the second parameter (SpeedStateScaleFactors NR_NTN ), the terminal can determine the corresponding timer duration for performing cell reselection based on the NTN cell: SpeedStateScaleFactors NR_NTN Multiply by TreselectionNR The value after.

[0193] In some embodiments, the terminal determines the corresponding first information according to the frequency of reselecting the cell.

[0194] In one example, the first information includes a first parameter (Treselection NR_NTN ) and the second parameter (SpeedStateScaleFactors NR_NTN ), the terminal may determine the corresponding timer length for performing cell reselection as Treselection based on the frequency of reselecting the cell. NR_NTN , or based on the frequency of cell reselection, the corresponding timer duration for performing cell reselection can be determined as: SpeedStateScaleFactors NR_NTN Multiply by Treselection NR_NTN The value after.

[0195] In one example, the first information only includes the first parameter (Treselection NR_NTN ), the terminal may determine the corresponding timer length for performing cell reselection based on the frequency of reselecting the cell. NR_NTN , or based on the frequency of cell reselection, the corresponding timer duration for performing cell reselection can be determined as: SpeedStateScaleFactors NR Multiply by Treselection NR_NTN The value after.

[0196] In one example, the first information only includes the second parameter (SpeedStateScaleFactors NR_NTN ), the terminal can determine the corresponding timer duration for performing cell reselection based on the frequency of reselecting the cell: SpeedStateScaleFactors NR_NTN Multiply by Treselection NR The value after.

[0197] In some embodiments, the terminal determines the corresponding first information according to the satellite to which the reselected cell belongs.

[0198] In one example, the first information includes a first parameter (Treselection NR_NTN ) and the second parameter (SpeedStateScaleFactors NR_NTN ), the terminal can determine the corresponding timer length for performing cell reselection based on the satellite to which the reselected cell belongs, as TreselectionNR_NTN , or based on the satellite to which the reselected cell belongs, the corresponding timer duration for performing cell reselection can be determined as: SpeedStateScaleFactors NR_NTN Multiply by Treselection NR_NTN The value after.

[0199] In one example, the first information only includes the first parameter (Treselection NR_NTN ), the terminal can determine the corresponding timer length for performing cell reselection based on the satellite to which the reselected cell belongs, as Treselection NR_NTN , or based on the satellite to which the reselected cell belongs, the corresponding timer duration for performing cell reselection can be determined as: SpeedStateScaleFactors NR Multiply by Treselection NR_NTN The value after.

[0200] In one example, the first information only includes the second parameter (SpeedStateScaleFactors NR_NTN ), the terminal can determine the corresponding timer duration for performing cell reselection based on the satellite to which the reselected cell belongs: SpeedStateScaleFactors NR_NTN Multiply by Treselection NR The value after.

[0201] In some embodiments, the terminal determines the corresponding first information according to the type of satellite to which the reselected cell belongs.

[0202] In one example, the first information includes a first parameter (Treselection NR_NTN ) and the second parameter (SpeedStateScaleFactors NR_NTN ), the terminal may determine the corresponding timer length for performing cell reselection based on the type of satellite to which the reselected cell belongs, as Treselection NR_NTN , or based on the type of satellite to which the reselected cell belongs, the corresponding timer duration for performing cell reselection can be determined as: SpeedStateScaleFactors NR_NTN Multiply by Treselection NR_NTN The value after.

[0203] In one example, the first information only includes the first parameter (Treselection NR_NTN), the terminal may determine the corresponding timer length for performing cell reselection based on the type of satellite to which the reselected cell belongs, as Treselection NR_NTN , or based on the type of satellite to which the reselected cell belongs, the corresponding timer duration for performing cell reselection can be determined as: SpeedStateScaleFactors NR Multiply by Treselection NR_NTN The value after.

[0204] In one example, the first information only includes the second parameter (SpeedStateScaleFactors NR_NTN ), the terminal can determine the corresponding timer duration for performing cell reselection based on the type of satellite to which the reselected cell belongs: SpeedStateScaleFactors NR_NTN Multiply by Treselection NR The value after.

[0205] In some embodiments, the terminal determines the corresponding first information according to the orbital altitude of the satellite to which the reselected cell belongs.

[0206] In one example, the first information includes a first parameter (Treselection NR_NTN ) and the second parameter (SpeedStateScaleFactors NR_NTN ), the terminal may determine the corresponding timer length for performing cell reselection based on the orbital height of the satellite to which the reselected cell belongs, as Treselection NR_NTN , the corresponding timer duration for performing cell reselection can also be determined based on the orbital altitude of the satellite to which the reselected cell belongs: SpeedStateScaleFactors NR_NTN Multiply by Treselection NR_NTN The value after.

[0207] In one example, the first information only includes the first parameter (Treselection NR_NTN ), the terminal may determine the corresponding timer length for performing cell reselection based on the orbital height of the satellite to which the reselected cell belongs, as Treselection NR_NTN , the corresponding timer duration for performing cell reselection can also be determined based on the orbital altitude of the satellite to which the reselected cell belongs: SpeedStateScaleFactors NR Multiply by Treselection NR_NTN The value after.

[0208] In one example, the first information only includes the second parameter (SpeedStateScaleFactors NR_NTN ), the terminal can determine the corresponding timer duration for performing cell reselection based on the orbital height of the satellite to which the reselected cell belongs: SpeedStateScaleFactors NR_NTN Multiply by Treselection NR The value after.

[0209] In step S203, the terminal performs cell reselection based on the corresponding first information.

[0210] In some embodiments, if the terminal satisfies the corresponding reselection criteria within the time indicated by the first parameter, the terminal can reselect from the E-UTRAN TN cell to the NR NTN cell.

[0211] In some embodiments, if the terminal meets the corresponding reselection criteria within the time indicated by the first parameter, the terminal can reselect from the NR TN cell to the NR NTN cell.

[0212] The communication method involved in the embodiments of the present disclosure may include at least one of steps S201 to S203. For example, step S201 may be implemented as an independent embodiment. For example, step S202 may be implemented as an independent embodiment. For example, step S203 may be implemented as an independent embodiment. For example, a combination of step S201 and step S202 may be implemented as an independent embodiment. For example, a combination of step S202 and step S203 may be implemented as an independent embodiment, but is not limited thereto.

[0213] In some embodiments, step S202 and step S203 may be performed simultaneously.

[0214] In some embodiments, the terms "determine," "adjust," "adjust," "reduce," "amplify," "increase," "decrease," etc. are used interchangeably.

[0215] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codeword", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0216] In some embodiments, the terms "carry," "include," "comprise," "encapsulate," etc. can be used interchangeably.

[0217] In some embodiments, the terms "radio", "wireless", "radio access network (RAN)", "access network (AN)", "RAN-based" and the like may be used interchangeably.

[0218] In some embodiments, "obtain", "get", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining by self-processing, autonomous implementation, etc.

[0219] In some embodiments, terms such as "send", "transmit", "report", "send", "transmit", "request", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0220] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "a certain", "any", and "first" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "a certain A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, a certain A, any A, or first A, etc., but not limited to this.

[0221] In some embodiments, the determination or judgment can be performed by a value represented by 1 bit (0 or 1), or by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a predetermined value), but is not limited thereto.

[0222] FIG3A is a schematic diagram illustrating an implementation flow of a terminal executing a communication method according to an embodiment of the present disclosure. The present disclosure embodiment relates to a communication method executed by a terminal. The communication method includes steps S3101 to S3103.

[0223] In step S3101, first information is obtained.

[0224] The optional implementation of step S3101 can refer to the optional implementation of step S201 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0225] In step S3102, corresponding first information is determined according to the reselected cell.

[0226] The optional implementation of step S302 can refer to 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.

[0227] In step S3103, cell reselection is performed based on the corresponding first information.

[0228] The optional implementation of step S3103 can refer to 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.

[0229] The communication method involved in the embodiments of the present disclosure may include at least one of steps S3101 to S3103. For example, step S3101 can be implemented as an independent embodiment. For example, step S3102 can be implemented as an independent embodiment. For example, step S3103 can be implemented as an independent embodiment. For example, the combination of step S3101 and step S3102 can be implemented as an independent embodiment. For example, the combination of step S3102 and step S3103 can be implemented as an independent embodiment, but is not limited to this.

[0230] In some embodiments, step S3102 and step S3103 may be performed simultaneously.

[0231] Figure 3B is a schematic diagram of an implementation flow of a network device executing a communication method according to an embodiment of the present disclosure. The present disclosure embodiment relates to a communication method, which is executed by a network device. The communication method includes step S3201.

[0232] In step S3201, the first information is sent.

[0233] The optional implementation of step S3201 can refer to the optional implementation of step S201 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0234] Figure 4 is a schematic diagram of an implementation flow of a terminal executing a communication method according to an embodiment of the present disclosure. The present disclosure embodiment relates to a communication method, which is executed by a terminal. The communication method includes step S401.

[0235] In step S401, first information is received.

[0236] The optional implementation of step S401 can refer to the optional implementation of step S201 in Figure 2 and other related parts in the embodiment involved in Figure 2, which will not be repeated here.

[0237] Hereinafter, the embodiments of the present disclosure are exemplarily described through specific implementation methods.

[0238] In some embodiments, for a UE reselecting from an E-UTRAN TN to an NR NTN, inter-frequency and / or inter-system cell reselection is performed using NR NTN-specific Treselection and / or SpeedStateScaleFactors, and the Treselection and / or SpeedStateScaleFactors may be configured according to a range of target satellite types or satellite orbit altitudes.

[0239] In some embodiments, the first information is used for inter-frequency and / or inter-RAT cell reselection, and the target cell is NR NTN.

[0240] In some embodiments, the first information includes time parameters and / or UE speed related parameters.

[0241] In some embodiments, the speed is used to adjust the time parameter, such as to reduce the time parameter.

[0242] In some embodiments, the NR NTN-associated time parameters and / or speed-related parameters are configured based on at least one of the following:

[0243] The frequency configuration of NR NTN, that is, different NR NTN frequency configurations have different parameters.

[0244] Satellite configuration, different satellites have different configuration parameters.

[0245] Satellite type configuration, such as LEO / MEO / GEO, different satellite types have different configuration parameters.

[0246] Satellite orbit altitude, for example, different satellite orbit altitude ranges are configured with different parameters.

[0247] In some embodiments, the first information is sent via a system message, such as SIB24.

[0248] In some embodiments, when the UE reselects from the E-UTRAN TN to the NR NTN, cell reselection is performed using the NR NTN associated time parameters.

[0249] In some embodiments, depending on the configuration of the network, when the target cell is NR NTN, cell reselection is performed using NR NTN-specific time parameters and / or speed-related parameters.

[0250] In some embodiments, according to the configuration of the network, when the target cell is NR NTN, the time parameters and / or speed-related parameters associated with the NR NTN frequency are determined based on the frequency of the target cell to perform cell reselection.

[0251] In some embodiments, according to the configuration of the network, when the target cell is NR NTN, the cell reselection is performed by determining the use of satellite-associated time parameters and / or speed-related parameters based on the satellite to which the target cell belongs.

[0252] In some embodiments, according to the configuration of the network, when the target cell is NR NTN, the time parameters and / or speed-related parameters associated with the satellite type are determined based on the type of satellite of the target cell to perform cell reselection.

[0253] In some embodiments, according to the configuration of the network, when the target cell is NR NTN, the time parameters and / or speed-related parameters associated with the satellite orbital height are determined based on the orbital height of the satellite of the target cell to perform cell reselection.

[0254] The embodiments of the present disclosure further provide a device for implementing any of the above methods, for example, a terminal including units or modules for implementing each step performed by the terminal in any of the above methods. For another example, another network device is provided, including units or modules for implementing each step performed by a network device (e.g., an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0255] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). Taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0256] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution 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 relationship of the hardware circuit. The logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by 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 implementing the hardware circuit configuration 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 a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), etc.

[0257] FIG5A is a schematic diagram of the structure of a terminal proposed in an embodiment of the present disclosure. As shown in FIG5A , the terminal 5100 may include: a first transceiver module 5101. In some embodiments, the first transceiver module 5101 is used to receive first information, and the first information is used by the terminal to perform inter-frequency and / or inter-system cell reselection, where the target cell for cell reselection is a non-terrestrial network (NTN) cell. In some embodiments, the first transceiver module 5101 is used to perform at least one of the communication steps such as sending and / or receiving performed by the terminal in any of the above methods (for example, step S3101, step S3102, step S3103, but not limited thereto), which will not be repeated here.

[0258] Figure 5B is an exemplary structural diagram of a network device provided according to an embodiment of the present disclosure. As shown in Figure 5B, network device 5200 may include a second transceiver module 5201. In some embodiments, second transceiver module 5201 may be configured to transmit first information, where the first information is used by a terminal to perform inter-frequency and / or inter-system cell reselection, where the target cell for cell reselection is a non-terrestrial network (NTN) cell. In some embodiments, second transceiver module 5201 may be configured to perform at least one of the communication steps, such as transmitting and / or receiving, performed by network device 102 in any of the above methods, which will not be further described herein.

[0259] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module. The transmitting module and the receiving module may be separate or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

[0260] Figure 6 is a schematic diagram of the structure of a communication device provided according to an embodiment of the present disclosure. Communication device 6100 can be a network device (e.g., an access network device, a core network device, etc.), a terminal (e.g., a user device, etc.), a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods. Communication device 6100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0261] As shown in Figure 6, the communication device 6100 includes one or more processors 6101. The processor 6101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process the communication protocol and communication data, and the central processing unit can be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute programs, and process program data. Optionally, the communication device 6100 is used to perform any of the above methods. Optionally, one or more processors 6101 are used to call instructions to enable the communication device 6100 to perform any of the above methods.

[0262] In some embodiments, the communication device 6100 further includes one or more transceivers 6102. When the communication device 6100 includes one or more transceivers 6102, the transceiver 6102 performs at least one of the communication steps of sending and / or receiving in the above method (for example, steps S201, S202, and S203, but not limited thereto). In an optional embodiment, the transceiver 6102 may include a receiver and / or a transmitter, and the receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, and interface may be interchangeable, the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be interchangeable, and the terms receiver, receiving unit, receiver, and receiving circuit may be interchangeable.

[0263] In some embodiments, the communication device 6100 further includes one or more memories 6103 for storing data. Alternatively, all or part of the memories 6103 may be located outside the communication device 6100. In alternative embodiments, the communication device 6100 may include one or more interface circuits 6104. Optionally, the interface circuits 6104 are connected to the memories 6103 and may be configured to receive data from the memories 6103 or other devices, or to send data to the memories 6103 or other devices. For example, the interface circuits 6104 may read data stored in the memories 6103 and send the data to the processor 6101.

[0264] The communication device 6100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 6100 described in the present disclosure is not limited thereto, and the structure of the communication device 6100 may not be limited by FIG. 6 . 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 a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0265] FIG7 is a schematic diagram of the structure of a chip provided according to an embodiment of the present disclosure. If the communication device 6100 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 7100 shown in FIG7 , but the present invention is not limited thereto.

[0266] The chip 7100 includes one or more processors 7101. The chip 7100 is configured to execute any of the above methods.

[0267] In some embodiments, chip 7100 further includes one or more interface circuits 7102. Terms such as interface circuit, interface, and transceiver pins may be used interchangeably. In some embodiments, chip 7100 further includes one or more memories 7103 for storing data. Alternatively, all or part of memory 7103 may be located external to chip 7100. Optionally, interface circuit 7102 is connected to memory 7103 and may be used to receive data from memory 7103 or other devices, or may be used to send data to memory 7103 or other devices. For example, interface circuit 7102 may read data stored in memory 7103 and send the data to processor 7101.

[0268] In some embodiments, the interface circuit 7102 performs at least one of the communication steps of sending and / or receiving in the above method (e.g., steps S201, S202, and S203, but not limited thereto). The interface circuit 7102 performing the communication steps of sending and / or receiving in the above method, for example, means that the interface circuit 7102 performs data exchange between the processor 7101, the chip 7100, the memory 7103, or the transceiver device.

[0269] The modules and / or devices described in various embodiments, such as virtual devices, physical devices, and chips, can be arbitrarily combined or separated according to circumstances. Optionally, some or all steps can also be performed collaboratively by multiple modules and / or devices, which is not limited here.

[0270] The embodiments of the present disclosure further provide a storage medium having instructions stored thereon. When the instructions are executed on the communication device 6100, the communication device 6100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a temporary storage medium.

[0271] The present disclosure also provides a program product, which, when executed by the communication device 6100, enables the communication device 6100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0272] The embodiments of the present disclosure further provide a computer program, which, when executed on a computer, enables the computer to execute any of the above methods.

[0273] Other embodiments of the present invention will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention that follow from the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0274] It should be understood that the present invention is not limited to the exact construction described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A communication method, performed by a terminal, comprising: First information is received, where the first information is used by the terminal to perform inter-frequency and / or inter-system cell reselection, where a target cell for the cell reselection is a non-terrestrial network (NTN) cell.

2. The method according to claim 1, wherein The first information includes at least one of the following: a first parameter associated with time, the first parameter being used to indicate a duration of a cell reselection timer of the NTN cell; A second parameter associated with the moving speed of the terminal, wherein the second parameter is used to determine the length of the cell reselection timer of the NTN cell.

3. The method according to claim 1 or 2, wherein: The second parameter is used to determine the value of the first parameter.

4. The method according to claim 3, wherein: The second parameter is used to reduce or increase the value of the first parameter.

5. The method according to any one of claims 1 to 4, wherein The first information is carried in system information.

6. The method according to any one of claims 1 to 5, wherein The first information is configured based on at least one of the following: NTN network; Frequency of NTN cell; Satellite to which the NTN cell belongs; The type of satellite to which the NTN cell belongs; The orbital height of the satellite to which the NTN cell belongs.

7. The method according to any one of claims 1 to 6, wherein The method further comprises: The corresponding first information is determined according to the reselected cell.

8. The method according to claim 7, wherein: The determining of the corresponding first information according to the reselected cell includes at least one of the following: Determining corresponding first information according to the reselected cell being an NTN cell; Determining corresponding first information according to the frequency of the reselected cell; Determining corresponding first information according to the satellite to which the reselected cell belongs; Determining corresponding first information according to the type of the satellite to which the reselected cell belongs; The corresponding first information is determined according to the orbital height of the satellite to which the reselected cell belongs.

9. A communication method, performed by a network device, comprising: First information is sent, where the first information is used by the terminal to perform inter-frequency and / or inter-system cell reselection, and the target cell of the cell reselection is a non-terrestrial network NTN cell.

10. The method according to claim 9, wherein: The first information includes at least one of the following: a first parameter associated with time, the first parameter being used to indicate a duration of a cell reselection timer of the NTN cell; A second parameter associated with the moving speed of the terminal, wherein the second parameter is used to determine the length of the cell reselection timer of the NTN cell.

11. The method according to claim 9 or 10, wherein: The second parameter is used to determine the value of the first parameter.

12. The method according to claim 11, wherein The second parameter is used to reduce or increase the value of the first parameter.

13. The method according to any one of claims 9 to 12, wherein: The first information is carried in system information.

14. The method according to any one of claims 9 to 13, wherein The first information is configured based on at least one of the following: NTN network; Frequency of NTN cell; Satellite to which the NTN cell belongs; The type of satellite to which the NTN cell belongs; The orbital height of the satellite to which the NTN cell belongs.

15. A terminal comprising: The first transceiver module is configured to receive first information, where the first information is used by the terminal to perform inter-frequency and / or inter-system cell reselection, where the target cell of the cell reselection is a non-terrestrial network (NTN) cell.

16. A network device comprising: The second transceiver module is configured to send first information, where the first information is used by the terminal to perform inter-frequency and / or inter-system cell reselection, and the target cell of the cell reselection is a non-terrestrial network NTN cell.

17. A terminal comprising: at least one processor; a memory storing instructions; When the instruction is executed by the terminal, the terminal implements the communication method according to any one of claims 1 to 8.

18. A network device comprising: at least one processor; a memory storing instructions; Wherein, when the instruction is executed by the network device, the network device implements any one of claims 9 to 14 Communication methods.

19. A communication system comprising: A terminal configured to implement the communication method according to any one of claims 1 to 8; A network device configured to implement the communication method according to any one of claims 9 to 14.

20. A storage medium storing instructions, wherein: When the instruction is executed on a communication device, the communication device is caused to execute the communication method according to any one of claims 1 to 14.

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