Community selection method and device

Abstract

This disclosure relates to a cell selection method and apparatus. The method, executed by a terminal, includes: determining that cell selection is performed based on the service duration of a cell, wherein the service duration of the cell indicates the time or time range during which the cell provides service to the terminal. Therefore, by selecting cells based on their service duration, the terminal can choose the cell with the longest service duration, thereby reducing the number of cell reselections, lowering terminal power consumption, and saving energy.

Description

Cell selection method and apparatus TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of communication, and particularly relates to a cell selection method and apparatus. BACKGROUND

[0002] In a NTN (Non-Terrestrial Network, non-terrestrial / ground communication) network architecture, a satellite (or a drone) provides wireless resources for a terminal. Since the satellite is movable, the terminal has to perform frequent cell reselection.

[0003] SUMMARY

[0004] The cell selection method and apparatus provided in the embodiments of the present disclosure are used to solve the problem of high power consumption due to frequent cell reselection of the terminal in the prior art.

[0005] The embodiments of the present disclosure provide a cell selection method and apparatus.

[0006] According to a first aspect of the embodiments of the present disclosure, a cell selection method is provided, which is performed by a terminal and includes: determining, when performing cell selection, performing cell selection according to a service duration of a cell, wherein the service duration of the cell is used to indicate a time or a time range in which the cell provides services for the terminal.

[0007] In the above embodiment, when performing cell selection, the terminal determines to perform cell selection according to the service duration of the cell, so that the cell with the longest service duration can be selected, thereby reducing the number of cell reselections of the terminal, reducing the power consumption of the terminal, and saving energy.

[0008] According to a second aspect of the embodiments of the present disclosure, a cell selection method is provided, which is performed by a network device and includes: sending first indication information to a terminal, wherein the first indication information is used to indicate a first parameter of a cell, the first parameter of the cell is used by the terminal to determine a service duration of the cell, the service duration of the cell is used by the terminal to determine, when performing cell selection, to perform cell selection according to the service duration of the cell; or the first parameter of the cell is used by the terminal to determine a cell with the longest service duration, the cell with the longest service duration is used by the terminal to determine, when performing cell selection, to select the cell with the longest service duration, and the service duration of the cell is used to indicate a time or a time range in which the cell provides services for the terminal.

[0009] In the above embodiment, the network device can indicate the first parameter of the cell to the terminal, which is used by the terminal to determine the service duration of the cell or the cell with the longest service duration, and then perform cell selection according to the service duration of the cell. The terminal can select the cell with the longest service duration, thereby reducing the number of cell reselections of the terminal, reducing the power consumption of the terminal, and saving energy.

[0010] According to a third aspect of the embodiments of the present disclosure, a terminal is provided, comprising: a processing module configured to determine, when performing cell selection, to perform cell selection according to a service duration of a cell.

[0011] According to a fourth aspect of the embodiments of the present disclosure, a network device is provided, comprising: a transceiver configured to send first indication information to a terminal, wherein the first indication information is used to indicate a first parameter of a cell, the first parameter of the cell is used by the terminal to determine a service duration of the cell, the service duration of the cell is used by the terminal to determine, when performing cell selection, to perform cell selection according to the service duration of the cell; or the first parameter of the cell is used by the terminal to determine a cell with a longest service duration, and the cell with the longest service duration is used by the terminal to determine, when performing cell selection, to select the cell with the longest service duration.

[0012] According to a fifth aspect of the embodiments of the present disclosure, a communication device is provided, comprising: one or more processors; and a memory coupled to the processors, the memory storing instructions that, when executed by the processors, cause the communication device to perform the method of the first aspect.

[0013] According to a sixth aspect of the embodiments of the present disclosure, a communication device is provided, comprising: one or more processors; and a memory coupled to the processors, the memory storing instructions that, when executed by the processors, cause the communication device to perform the method of the second aspect.

[0014] According to a seventh aspect of the embodiments of the present disclosure, a communication system is provided, comprising a terminal and a network device, wherein the terminal is configured to implement the method of the first aspect, and the network device is configured to implement the method of the second aspect.

[0015] According to an eighth aspect of the embodiments of the present disclosure, a storage medium is provided, the storage medium storing instructions that, when executed on a communication device, cause the communication device to perform the method of the first aspect or the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0016] FIG. 1 is an architecture diagram of a communication system according to an embodiment of the present disclosure;

[0017] FIG. 2 is a schematic diagram of an NTN network architecture according to an embodiment of the present disclosure;

[0018] FIG. 3A is a flowchart of a cell selection method according to an embodiment of the present disclosure;

[0019] FIG. 3B is a flowchart of another cell selection method according to an embodiment of the present disclosure;

[0020] FIG. 3C is a flowchart of yet another cell selection method according to an embodiment of the present disclosure;

[0021] FIG. 4 is a schematic diagram of a cell coverage range according to an embodiment of the present disclosure;

[0022] FIG. 5A is a flowchart of another cell selection method according to an embodiment of the present disclosure;

[0023] FIG. 5B is a flowchart of another cell selection method according to an embodiment of the present disclosure;

[0024] FIG. 6A is a flowchart of another cell selection method according to an embodiment of the present disclosure;

[0025] FIG. 6B is a flowchart of another cell selection method according to an embodiment of the present disclosure;

[0026] FIG. 7A is a structural diagram of a terminal according to an embodiment of the present disclosure;

[0027] FIG. 7B is a structural diagram of a network device according to an embodiment of the present disclosure;

[0028] FIG. 8A is a structural diagram of a communication device according to an embodiment of the present disclosure;

[0029] FIG. 8B is a structural diagram of a chip according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0030] Embodiments of the present disclosure provide a cell selection method and apparatus.

[0031] In a first aspect, embodiments of the present disclosure provide a cell selection method, performed by a terminal, comprising: determining, when performing cell selection, performing cell selection according to a service duration of a cell, wherein the service duration of the cell is used to indicate a time or a time range during which the cell provides service for the terminal.

[0032] In the above embodiments, when performing cell selection, the terminal performs cell selection according to the service duration of the cell, so that the cell with the longest service duration can be selected, thereby reducing the number of times of cell reselection of the terminal, reducing power consumption of the terminal, and saving energy.

[0033] In some embodiments in combination with the first aspect, when performing cell selection, the terminal performs cell selection according to the service duration of the cell, comprising: determining the service duration of the cell according to a first parameter of the cell; performing cell selection according to the service duration of the cell; wherein the first parameter comprises at least one of: a coverage range; an orbital height; a downtilt angle; an elevation angle; and a service time.

[0034] In the above embodiments, the terminal can determine the service duration of the cell according to the first parameter of the cell, and then perform cell selection, so that the cell with the longest service duration can be selected, thereby reducing the number of times of cell reselection of the terminal, reducing power consumption of the terminal, and saving energy.

[0035] With reference to some embodiments of the first aspect, in some embodiments, when the terminal determines to perform cell selection, the terminal performs cell selection according to the service duration of the cells, including: determining a cell that provides the longest service duration to the terminal; and determining to select the cell that provides the longest service duration when performing cell selection.

[0036] In the above embodiments, the terminal selects the cell that provides the longest service duration to perform switching, and the terminal can avoid frequent cell selection / reselection, reduce the number of times of cell reselection of the terminal, reduce power consumption of the terminal, and save energy.

[0037] With reference to some embodiments of the first aspect, in some embodiments, the terminal determines the cell that provides the longest service duration to the terminal, including: determining the cell that provides the longest service duration to the terminal according to a first parameter of the cells; and wherein the first parameter includes at least one of: coverage range; orbital height; downtilt angle; elevation angle; and service time.

[0038] In the above embodiments, the terminal can determine the cell that provides the longest service duration to the terminal according to the first parameter of the cells, to select the cell that provides the longest service duration to perform switching, avoid frequent cell selection / reselection, reduce power consumption of the terminal, and save energy.

[0039] With reference to some embodiments of the first aspect, in some embodiments, the terminal determines the cell that provides the longest service duration to the terminal according to a first parameter of the cells, including: determining a cell with the largest coverage range as the cell that provides the longest service duration to the terminal according to the coverage range of the cells, wherein the first parameter includes the coverage range; or determining a cell with the highest orbital height as the cell that provides the longest service duration to the terminal according to the orbital height of the cells, wherein the first parameter includes the orbital height; or determining a cell with the largest downtilt angle as the cell that provides the longest service duration to the terminal according to the downtilt angle of the cells, wherein the first parameter includes the downtilt angle; or determining a cell with the latest end time of service time as the cell that provides the longest service duration to the terminal according to the service time of the cells, wherein the first parameter includes the service time.

[0040] With reference to some embodiments of the first aspect, in some embodiments, the method further includes: receiving, by the terminal, first indication information sent by the network device, wherein the first indication information is used to indicate the first parameter of the cells; and determining, by the terminal, the first parameter of the cells according to the first indication information.

[0041] In the above embodiments, the network device indicates the first parameter of the cells to the terminal, so that the terminal determines the cell that provides the longest service time according to the first parameter of the cells.

[0042] In some embodiments of the first aspect, when the terminal determines to perform cell selection, the terminal performs cell selection according to the service duration of the cells, including: calculating a second parameter value of the cells according to the cell ranking criterion; ranking the cells according to the second parameter values of the cells, and determining the cells in the top N positions in the ranking, where N is a positive integer; and when the terminal determines to perform cell selection, performing cell selection according to the service duration of the cells in the top N positions.

[0043] In the above embodiments, the terminal can perform cell selection according to the service duration of the cells in the top N positions in the ranking according to the second parameter values of the cells calculated according to the cell ranking criterion.

[0044] In some embodiments of the first aspect, the method further includes: receiving, by the terminal, second indication information sent by the network device, where the second indication information is used to indicate the value of N.

[0045] In some embodiments of the first aspect, the method further includes: receiving, by the terminal, third indication information sent by the network device, where the third indication information is used to indicate that, when the terminal determines to perform cell selection, the terminal performs cell selection according to the service duration of the cells in the top N positions.

[0046] In the above embodiments, the terminal receives the indication of the network device, and determines to perform cell selection according to the service duration of the cells in the top N positions, which can reduce the number of times of cell reselection of the terminal, reduce the power consumption of the terminal, and save energy.

[0047] In some embodiments of the first aspect, the method further includes: sending, by the terminal, fourth indication information to the network device, where the fourth indication information is used to indicate that, when the terminal determines to perform cell selection, the terminal performs cell selection according to the service duration of the cells.

[0048] In the above embodiments, the terminal can send the fourth indication information to the network device to indicate that, when the terminal determines to perform cell selection, the terminal performs cell selection according to the service duration of the cells, which can reduce the number of times of cell reselection of the terminal, reduce the power consumption of the terminal, and save energy.

[0049] In some embodiments of the first aspect, the terminal sends the fourth indication information to the network device, including: determining that a first condition is met, and sending the fourth indication information to the network device; and the first condition includes at least one of the following: the terminal predicts that the service demand is lower than a service demand threshold; the terminal predicts that the power is lower than a power threshold; and the terminal enters a power saving mode.

[0050] In the above embodiment, the terminal indicates to the network device that the terminal performs cell selection according to the service duration of the cell when determining to perform cell selection in at least one of the following cases: the predicted service demand is lower than the service demand threshold, the terminal power is lower than the power threshold, and the terminal enters the power saving mode, thereby reducing the number of times of cell reselection of the terminal, reducing the power consumption of the terminal, and saving energy.

[0051] In some embodiments of the first aspect, the method further includes: receiving, by the terminal, fifth indication information sent by the network device, wherein the fifth indication information is used to indicate the terminal to perform cell selection according to the service duration of the cell when determining to perform cell selection.

[0052] In the above embodiment, the terminal receives the indication of the network device, and determines to perform cell selection according to the service duration of the cell when determining to perform cell selection, thereby reducing the number of times of cell reselection of the terminal, reducing the power consumption of the terminal, and saving energy.

[0053] In the second aspect, the embodiments of the present disclosure provide a cell selection method, performed by a network device, including: sending first indication information to a terminal, wherein the first indication information is used to indicate a first parameter of a cell, the first parameter of the cell is used for the terminal to determine a service duration of the cell, and the service duration of the cell is used for the terminal to determine to perform cell selection according to the service duration of the cell when determining to perform cell selection; or the first parameter of the cell is used for the terminal to determine a cell with the longest service duration, and the cell with the longest service duration is used for the terminal to determine to select the cell with the longest service duration when determining to perform cell selection.

[0054] In the above embodiment, the network device can indicate the first parameter of the cell to the terminal, which is used for the terminal to determine the service duration of the cell or the cell with the longest service duration, and then the terminal can perform cell selection according to the service duration of the cell, or select the cell with the longest service duration, thereby reducing the number of times of cell reselection of the terminal, reducing the power consumption of the terminal, and saving energy.

[0055] In some embodiments of the second aspect, the first parameter includes at least one of: a coverage range; an orbital height; a downtilt angle; an elevation angle; and a service time.

[0056] In some embodiments of the second aspect, the method further includes: receiving, by the network device, fourth indication information sent by the terminal, wherein the fourth indication information is used to indicate the terminal to perform cell selection according to the service duration of the cell when determining to perform cell selection; or sending, by the network device, fifth indication information to the terminal, wherein the fifth indication information is used to indicate the terminal to perform cell selection according to the service duration of the cell when determining to perform cell selection.

[0057] In the above embodiments, the network device can instruct the terminal to perform cell selection according to the service duration of the cells, or the network device can receive fourth indication information sent by the terminal, and determine that the terminal performs cell selection according to the service duration of the cells, so that when the terminal performs cell selection, the cell with the longest service duration can be selected according to the service duration of the cells, the number of times of cell reselection of the terminal is reduced, the power consumption of the terminal is reduced, and energy is saved.

[0058] In combination with some embodiments of the second aspect, in some embodiments, the method further includes: the network device sending third indication information to the terminal, where the third indication information is used to instruct the terminal to determine, when performing cell selection, to calculate a second parameter value of a cell according to a cell ranking criterion, to perform ranking according to the second parameter value of the cell, to determine N cells with the highest ranking, and to perform cell selection according to the service duration of the N cells with the highest ranking.

[0059] In combination with some embodiments of the second aspect, in some embodiments, the method further includes: the network device sending second indication information to the terminal, where the second indication information is used to indicate the value of N.

[0060] In the third aspect, the embodiments of the present disclosure provide a terminal, which includes at least one of a transceiver module and a processing module; and the terminal is configured to perform the optional implementation manners of the first aspect.

[0061] In the fourth aspect, the embodiments of the present disclosure provide a network device, which includes at least one of a transceiver module and a processing module; and the network device is configured to perform the optional implementation manners of the second aspect.

[0062] In the fifth aspect, the embodiments of the present disclosure provide a communication device, which includes one or more processors and a memory coupled to the processors, and the memory stores instructions that, when executed by the processors, cause the communication device to perform the method of the first aspect.

[0063] In the sixth aspect, the embodiments of the present disclosure provide a communication device, which includes one or more processors and a memory coupled to the processors, and the memory stores instructions that, when executed by the processors, cause the communication device to perform the method of the second aspect.

[0064] In the seventh aspect, the embodiments of the present disclosure provide a communication system, which includes a terminal and a network device; the terminal is configured to perform the method described in the optional implementation manners of the first aspect, and the network device is configured to perform the method described in the optional implementation manners of the second aspect.

[0065] In an eighth aspect, the embodiments of the present disclosure provide a storage medium, which stores instructions. When the instructions are executed on a communication device, the communication device performs the method described in the optional implementation of the first aspect or the second aspect.

[0066] In a ninth aspect, the embodiments of the present disclosure provide a program product, which, when executed by a communication device, causes the communication device to perform the method described in the optional implementation of the first aspect or the second aspect.

[0067] In a tenth aspect, the embodiments of the present disclosure provide a computer program, which, when executed on a computer, causes the computer to perform the method described in the optional implementation of the first aspect or the second aspect.

[0068] In an eleventh aspect, the embodiments of the present disclosure provide a chip or a chip system. The chip or the chip system includes processing circuitry configured to perform the method described in the optional implementation of the first aspect or the second aspect.

[0069] It can be understood that the network device, the terminal, the communication device, the communication system, the storage medium, the program product, the computer program, the chip or the chip system are all used to perform the method proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved are referred to the beneficial effects in the corresponding method, which will not be described here.

[0070] The embodiments of the present disclosure propose a cell selection method and device. In some embodiments, the terms of cell selection method, information processing method, and communication method can be replaced with each other.

[0071] The embodiments of the present disclosure are not exhaustive, but only illustrate some embodiments, and are not specific limitations on the protection scope of the present disclosure. In the case of no contradiction, each step in an embodiment can be implemented as an independent embodiment, and the steps can be combined arbitrarily, for example, the scheme after removing some steps in an embodiment can also be implemented as an independent embodiment, and the order of the steps in an embodiment can be exchanged arbitrarily, in addition, the optional implementation in an embodiment can be combined arbitrarily; in addition, the embodiments can be combined arbitrarily, for example, the steps of different embodiments or the optional implementation of other embodiments can be combined arbitrarily, and an embodiment can be combined with the optional implementation of other embodiments.

[0072] In the embodiments of the present disclosure, the terms and / or descriptions of the embodiments are consistent and can be referred to each other if there is no special description and logical conflict, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0073] The terminology used in the disclosure of the embodiments herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure.

[0074] In the embodiments of the present disclosure, unless otherwise specified, the elements expressed in singular form, such as "one", "a", "the", "above", "said", "preceding", "this", etc., can represent "one and only one", or can represent "one or more", "at least one", etc. For example, in the case of using articles such as "a", "an", "the" in English, the noun after the article can be understood as singular expression, or can be understood as plural expression.

[0075] In the embodiments of the present disclosure, "plurality" means two or more.

[0076] In some embodiments, the terms "at least one of", "one or more of", "a plurality of", "multiple", and the like can be replaced with each other.

[0077] In some embodiments, the description manner such as "at least one of A, B", "A and / or B", "A in one case, B in another case", "responding to a case A, responding to another case B", and the like can include the following technical solutions according to the case: A in some embodiments (A is executed regardless of B); B in some embodiments (B is executed regardless of A); A and B are selectively executed in some embodiments (A and B are selected from A and B); A and B are executed in some embodiments (A and B are executed). When there are more branches such as A, B, C, etc., it is similar to the above.

[0078] In some embodiments, the description manner such as "A or B" and the like can include the following technical solutions according to the case: A in some embodiments (A is executed regardless of B); B in some embodiments (B is executed regardless of A); A and B are selectively executed in some embodiments (A and B are selected from A and B). When there are more branches such as A, B, C, etc., it is similar to the above.

[0079] The prefix words of "first", "second" and the like in the embodiments of the present disclosure are merely used to distinguish different description objects, and do not constitute limitation on the position, order, priority, quantity or content of the description objects. The description objects are described in the claims or embodiments, and should not be construed as redundant limitation because of the use of the prefix words. For example, the description object is "field", and the ordinal words before "field" in "first field" and "second field" do not limit the position or order between "fields", and "first" and "second" do not limit whether the "fields" modified thereby are in the same message or not, nor limit the order of "first field" and "second field". For another example, the description object is "level", and the ordinal words before "level" in "first level" and "second level" do not limit the priority between "levels". For another example, the quantity of the description object is not limited by the ordinal words, and can be one or more. For example, "first device", wherein the quantity of "device" can be one or more. In addition, the objects modified by different prefix words can be the same or different, for example, the description object is "device", and "first device" and "second device" can be the same device or different devices, and the types thereof can be the same or different. For another example, the description object is "information", and "first information" and "second information" can be the same information or different information, and the contents thereof can be the same or different.

[0080] In some embodiments, "including A", "containing A", "for indicating A", "carrying A" can be interpreted as directly carrying A, or indirectly indicating A.

[0081] In some embodiments, the terms of "in response to", "in response to determining", "in the case of", "when", "when", "if", "if" and the like can be replaced with each other.

[0082] In some embodiments, the terms of "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not lower than", "above" and the like can be replaced with each other, and the terms of "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", "below" and the like can be replaced with each other.

[0083] In some embodiments, an apparatus or the like can be interpreted as an entity, and can also be interpreted as virtual, and the name thereof is not limited to the name described in the embodiments. The terms "apparatus", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject" and the like can be replaced with each other.

[0084] In some embodiments, a "network" can be interpreted as an apparatus (for example, an access network device, a core network device, and the like) included in the network.

[0085] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN device)", "base station (BS)", "radio base station", "fixed station", "node", "access point", "transmission point (TP)", "reception point (RP)", "transmission / reception point (TRP)", "panel", "antenna panel", "antenna array", "cell", "macro cell", "small cell", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)", "access network element" and the like can be replaced with each other.

[0086] 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," and so on can be replaced with each other.

[0087] In some embodiments, the access network device, the core network device, or the network device can be replaced with a terminal. For example, the embodiments of the present disclosure can also be applied to a structure in which communication between the access network device, the core network device, or the network device and the terminal is replaced with communication between a plurality of terminals (e.g., device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, the terminal can also be configured to have all or part of the functions of the access network device. In addition, the terms "uplink," "downlink," and the like can also be replaced with terms corresponding to the inter-terminal communication (e.g., "side"). For example, the uplink channel, the downlink channel, and the like can be replaced with the side channel, and the uplink, the downlink, and the like can be replaced with the sidelink.

[0088] In some embodiments, the terminal can be replaced with the access network device, the core network device, or the network device. In this case, the access network device, the core network device, or the network device can also be configured to have all or part of the functions of the terminal.

[0089] In some embodiments, the data, information, etc. can be acquired in compliance with the laws and regulations of the country where the location is situated.

[0090] In some embodiments, the data, information, etc. can be acquired after obtaining the consent of the user.

[0091] In addition, each element, each row, or each column in the table of the embodiments of the present disclosure can be implemented as an independent embodiment, and any combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0092] FIG. 1 is an architecture diagram of a communication system provided by an embodiment of the present disclosure.

[0093] As shown in FIG. 1, the communication system 100 includes a terminal 101 and a network device 102.

[0094] In some embodiments, the terminal 101 includes at least one of a mobile phone, a wearable device, an Internet of Things device, a communication-capable automobile, a smart automobile, a Pad, 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 smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city, a wireless terminal device in smart home, and the like, but is not limited thereto.

[0095] In some embodiments, the network device 102 can include at least one of an access network device and a core network device.

[0096] In some embodiments, the access network device is, for example, a node or device that accesses a terminal to a wireless network, and can include at least one of an evolved NodeB (eNB) in a 5G communication system, a next generation eNB (ng-eNB), a next generation NodeB (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 RAN, a base station in other communication systems, an access node in a Wi-Fi system, but is not limited thereto.

[0097] In some embodiments, the access network device can be a satellite.

[0098] In some embodiments, the core network device can be one device including all or part of the first network element, the second network element, etc., or can be multiple devices or device groups including all or part of the first network element, the second network element, etc., respectively. The network function can be virtual or physical. The core network includes, for example, at least one of an evolved packet core (EPC), a 5G core network (5GCN), and a next generation core (NGC).

[0099] In some embodiments, the first network element is, for example, a network data analytics function (NWDAF)

[0100] In some embodiments, the second network element is, for example, an access and mobility management function (AMF).

[0101] In some embodiments, the first network element is intended to support network automation and intelligence, optimize network performance, manage network resources, and provide better user experience by analyzing and utilizing network data.

[0102] In some embodiments, the NWDAF is a key component in a fifth generation (5G) network architecture, which is defined in the 5G standard by the 3rd generation partnership project (3GPP).

[0103] In some embodiments, the second network element is used for access control and mobility management of terminal access to an operator network, for example, including functions such as mobile state management, allocation of user temporary identity, authentication and authorization of users, and the name is not limited thereto.

[0104] It can be understood that the communication system described in the embodiments of the present disclosure is for more clearly illustrating the technical solutions of the embodiments of the present disclosure, and does not constitute a limitation on the technical solutions proposed by the embodiments of the present disclosure. It can be known by those skilled in the art that, as the system architecture evolves and new business scenarios appear, the technical solutions proposed by the embodiments of the present disclosure are also applicable to similar technical problems.

[0105] The following embodiments of the present disclosure can be applied to the communication system 100 shown in FIG. 1, or part of the subject, but are not limited thereto. The subjects shown in FIG. 1 are exemplary, and the communication system can include all or part of the subjects in FIG. 1, or other subjects other than FIG. 1. The number and form of each subject is arbitrary, each subject can be physical or virtual, the connection relationship between each subject is exemplary, each subject can not be connected or can be connected, the connection can be in any way, can be direct connection or indirect connection, can be wired connection or wireless connection.

[0106] Embodiments of the present disclosure can be applied to long term evolution (LTE), LTE-advanced (LTE-A), LTE-beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new-radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), global System for mobile communications (GSM (registered trademark)), CDMA2000, ultra mobile broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, ultra-wide band (UWB), bluetooth (bluetooth (registered trademark)), public land mobile network (PLMN) network, device-to-device (D2D) system, machine to machine (M2M) system, internet of things (IoT) system, vehicle-to-everything (V2X), system using other communication methods, next-generation system expanded based on them, and the like. In addition, a plurality of systems can be combined (for example, combination of LTE or LTE-A and 5G, and the like).

[0107] It should be noted that the cell selection by the terminal in the embodiments of the present disclosure includes cell selection (or cell initial selection) and cell reselection. The cell initial selection can be understood as initially selecting a cell in a case where the terminal has not accessed the cell, and the cell reselection can be understood as reselecting a cell in a case where the terminal has accessed the cell.

[0108] It should be further noted that in the embodiments of the present disclosure, the terminal performs cell selection, and the cell selection can be performed from the serving cell and the neighbor cell. The cell selection is to perform measurement on the cell, for example, radio resource management (RRM) measurement.

[0109] For a terrestrial network (TN) or NTN, the terminal has corresponding rules when performing cell selection / reselection.

[0110] The first criterion (i.e., S criterion) includes Srxlev>0 and Squal>0. Srxlev is a cell selection level, and Squal is a cell selection quality. The cell selected / reselected by the terminal needs to meet the S criterion.

[0111] For intra-frequency and inter-frequency cell reselection of the same priority, the terminal calculates the R value of each cell according to a cell ranking criterion (i.e., R criterion).

[0112] Rs=Q meas,s +Qhyst-Qoffset temp ; Rn=Q meas,n -Qoffset-Qoffset temp .

[0113] Rs is the R value of the serving cell, Rn is the R value of the neighbor cell, Q meas,s is a reference signal receiving power (RSRP) measurement value of the serving cell, Q meas,n is a RSRP measurement value of the neighbor cell, Qhyst is a cell reselection hysteresis value, and Qoffset temp is a temporary offset value; and Qoffset is an offset value.

[0114] Referring to Table 1 below:

[0115] Table 1

[0116] In some embodiments, the terminal calculates the R value of all cells meeting the first criterion (i.e., S criterion) according to the above-mentioned cell ranking criterion (i.e., R criterion).

[0117] If rangeToBestCell is not configured, the terminal shall reselect to the cell with the highest R value. If rangeToBestCell is configured, the terminal shall first determine the cells with R values within the rangeToBestCell, and reselect to the cell with the most beams exceeding the threshold (i.e. absThreshSS-BlocksConsolidation). If multiple cells have the same number of beams, the terminal shall reselect to the cell with the highest R value among these cells.

[0118] For higher priority NR frequency or inter-RAT frequency than the serving frequency, and lower priority NR frequency or inter-RAT frequency than the serving frequency, there is a set of criteria for selecting a cell on that frequency. The terminal shall first select a cell on a higher priority frequency, if there are multiple cells on the frequency that meet the criteria, then determine a target cell based on the R criteria.

[0119] In some embodiments, NTN (Non-terrestrial Network) provides wireless resources through satellites (or drones) instead of ground base stations, and its architecture is shown in Figure 2.

[0120] From the NTN network architecture, it can be seen that even if the terminal does not move on the ground, due to the movement of the satellite, the terminal in the non-radio resource control (RRC) connected state also needs to perform cell reselection. Therefore, for satellites in non-geostationary orbits, they move at high speed relative to fixed positions on the earth, causing stationary and mobile terminals to frequently and inevitably perform cell reselection, which requires the terminal to frequently start serving cell and / or neighbor cell measurement, resulting in increased power consumption of the terminal. Therefore, it is desirable for the terminal to reduce the number of cell reselections and reduce the power consumption of the terminal.

[0121] Based on this, the embodiment of the disclosure provides a cell selection method and device. The method performed by the terminal comprises: determining, when performing cell selection, performing cell selection according to a service duration of a cell. In this way, the terminal performs cell selection according to the service duration of the cell, can select a cell with the longest service duration, reduces the number of times of cell reselection of the terminal, reduces the power consumption of the terminal, and saves energy.

[0122] FIG. 3A is an interaction schematic diagram of a cell selection method according to an embodiment of the disclosure. As shown in FIG. 3A, the embodiment of the disclosure relates to a cell selection method, and the method comprises:

[0123] S301A, the terminal determines, when performing cell selection, performing cell selection according to a service duration of a cell.

[0124] In the embodiment of the disclosure, the terminal performs cell selection according to the service duration of the cell when performing cell selection.

[0125] The service duration of the cell is used to indicate the time or time range during which the cell provides services for the terminal.

[0126] For example, a first cell of a network device supports providing network services for a terminal from 8:00 to 10:00, and the service duration of the first cell is from 8:00 to 10:00.

[0127] For example, a second cell of a network device supports providing network services for a terminal from 8:00 to 10:00, and the terminal enters the second cell at 8:00, and the service duration of the second cell is 2 hours.

[0128] In some embodiments, the terminal receives fourth indication information sent by the network device, and when the fourth indication information is used to indicate that the terminal determines, when performing cell selection, performing cell selection according to the service duration of the cell, the terminal determines, when performing cell selection, performing cell selection according to the service duration of the cell.

[0129] In some embodiments, the terminal determines, when performing cell selection, performing cell selection according to the service duration of the cell, comprising: determining a cell that provides the longest service duration for the terminal; and determining, when performing cell selection, selecting the cell with the longest service duration.

[0130] It can be understood that the terminal selects a cell that can provide the longest service duration for the terminal, can avoid frequent cell selection / reselection, can reduce the number of times of cell reselection, reduce the power consumption of the terminal, and save energy.

[0131] In some embodiments, the terminal determines a cell that provides the longest service duration for the terminal, comprising: determining, according to a first parameter of the cell, a cell that provides the longest service duration for the terminal.

[0132] The first parameter includes at least one of the following: coverage range, track height, downtilt angle, elevation angle, and service time.

[0133] The downtilt angle may, for example, represent a maximum downtilt angle and / or a minimum downtilt angle.

[0134] The elevation angle may, for example, represent a maximum elevation angle and / or a minimum elevation angle.

[0135] For an earth fixed cell, the service time that the cell can provide to a UE may, for example, be provided.

[0136] It can be understood that the longer the coverage range of a cell, the longer the service time that the cell can provide to a terminal. Based on this, the terminal determines the cell that provides the longest service time to the terminal according to the coverage range of the cell.

[0137] It can also be understood that, as shown in FIG. 4, for a satellite, the footprint of the satellite on the ground is related to the track height and the elevation angle of the satellite.

[0138] In the case of the same elevation angle, the higher the track of the satellite, the larger the coverage area. In the case of the same track height of the satellite, the smaller the elevation angle, the larger the coverage area. Based on this, the terminal determines the cell that provides the longest service time to the terminal according to the track height of the cell, or the terminal determines the cell that provides the longest service time to the terminal according to the downtilt angle of the cell, or the terminal determines the cell that provides the longest service time to the terminal according to the elevation angle of the cell.

[0139] It can be understood that the service time of different cells is different, and the terminal can determine the cell that provides the longest service time to the terminal according to the service time of the cell.

[0140] In some embodiments, the terminal determines the cell that provides the longest service time to the terminal according to the first parameter of the cell, including: determining the cell with the largest coverage range as the cell that provides the longest service time to the terminal according to the coverage range of the cell, wherein the first parameter includes the coverage range; or determining the cell with the highest track height as the cell that provides the longest service time to the terminal according to the track height of the cell, wherein the first parameter includes the track height; or determining the cell with the largest downtilt angle as the cell that provides the longest service time to the terminal according to the downtilt angle of the cell, wherein the first parameter includes the downtilt angle; or determining the cell with the smallest elevation angle as the cell that provides the longest service time to the terminal according to the elevation angle of the cell, wherein the first parameter includes the elevation angle; or determining the cell with the latest end of service time as the cell that provides the longest service time to the terminal according to the service time of the cell, wherein the first parameter includes the service time.

[0141] Exemplarily, the terminal determines the cell with the largest coverage range as the cell providing service to the terminal for the longest time according to the coverage ranges of the cells.

[0142] Exemplarily, the terminal determines the cell with the highest orbital height as the cell providing service to the terminal for the longest time according to the orbital heights of the cells.

[0143] Exemplarily, the terminal determines the cell with the largest downtilt angle as the cell providing service to the terminal for the longest time according to the downtilt angles of the cells.

[0144] Exemplarily, the terminal determines the cell with the smallest elevation angle as the cell providing service to the terminal for the longest time according to the elevation angles of the cells.

[0145] Exemplarily, the terminal determines the cell with the latest service time end as the cell providing service to the terminal for the longest time according to the service times of the cells.

[0146] In some embodiments, the terminal selects the cell with the highest orbital height according to the orbital heights of the cells, and if there are multiple cells with the highest orbital height, selects the cell with the largest downtilt angle from the multiple cells with the highest orbital height to determine as the cell providing service to the terminal for the longest time.

[0147] In some embodiments, the terminal selects the cell with the highest orbital height according to the orbital heights of the cells, and if there are multiple cells with the highest orbital height, selects the cell with the smallest elevation angle from the multiple cells with the highest orbital height to determine as the cell providing service to the terminal for the longest time.

[0148] In some embodiments, the terminal selects the cell with the highest orbital height according to the orbital heights of the cells, and if there are multiple cells with the highest orbital height, selects the cell with the latest service time end from the multiple cells with the highest orbital height to determine as the cell providing service to the terminal for the longest time.

[0149] In some embodiments, the terminal selects the cell with the smallest elevation angle according to the elevation angles of the cells, and if there are multiple cells with the smallest elevation angle, selects the cell with the highest orbital height from the multiple cells with the smallest elevation angle to determine as the cell providing service to the terminal for the longest time.

[0150] In some embodiments, the terminal selects the cell with the smallest elevation angle according to the elevation angles of the cells, and if there are multiple cells with the smallest elevation angle, selects the cell with the latest service time end from the multiple cells with the smallest elevation angle to determine as the cell providing service to the terminal for the longest time.

[0151] In some embodiments, the terminal selects the cell with the largest downtilt angle according to the downtilt angles of the cells, and if there are multiple cells with the largest downtilt angle, selects the cell with the highest orbital height from the multiple cells with the largest downtilt angle to determine as the cell providing service to the terminal for the longest time.

[0152] In some embodiments, the terminal selects a cell with the largest downtilt angle according to the downtilt angle of the cell, and if there are multiple cells with the largest downtilt angle, selects a cell with the latest end time of service from the multiple cells with the largest downtilt angle to determine the cell providing the longest service time for the terminal.

[0153] In some embodiments, the terminal selects a cell with the highest orbital height according to the orbital height of the cell, and if there are multiple cells with the highest orbital height, selects a cell with the largest downtilt angle from the multiple cells with the highest orbital height, and if there are multiple cells with the largest downtilt angle, selects a cell with the smallest elevation angle from the multiple cells with the largest downtilt angle, and if there are multiple cells with the smallest elevation angle, selects a cell with the latest end time of service from the multiple cells with the smallest elevation angle to determine the cell providing the longest service time for the terminal.

[0154] It can be understood that in the embodiments of the present disclosure, the terminal determines a cell providing the longest service time for the terminal according to at least one of the coverage range, the orbital height, the downtilt angle, the elevation angle and the service time of the cell, wherein the cell with the largest coverage range, the highest orbital height, the largest downtilt angle, the smallest elevation angle and the latest end time of service is determined as the cell providing the longest service time for the terminal; wherein the determination order of the cell with the largest coverage range, the highest orbital height, the largest downtilt angle, the smallest elevation angle and the latest end time of service can be arbitrarily set according to needs, and the embodiments of the present disclosure do not exemplify one by one.

[0155] It can be understood that the terminal determines the first parameter of the cell can be determined based on a protocol agreement, or can be determined based on terminal implementation, or can also be determined based on the indication of the network device.

[0156] In some embodiments, the terminal receives first indication information sent by the network device, wherein the first indication information is used to indicate the first parameter of the cell; and determines the first parameter of the cell according to the first indication information.

[0157] In the embodiments of the present disclosure, the network device can send first indication information to the terminal, and the first indication information is used to indicate the first parameter of the cell. Therefore, the terminal can determine the first parameter of the cell according to the first indication information sent by the network device.

[0158] It can be understood that the network device can provide the first parameter of the neighbor cell to the terminal through the serving cell.

[0159] In some embodiments, when the terminal determines to perform cell selection, the terminal performs cell selection according to the service duration of the cells, including: calculating a second parameter value of the cells according to a cell ranking criterion; ranking the cells according to the second parameter values of the cells, and determining the top N cells in the ranking, where N is a positive integer; and when the terminal determines to perform cell selection, performing cell selection according to the service duration of the top N cells.

[0160] In the embodiments of the present disclosure, the terminal calculates a second parameter value of the cells according to a cell ranking criterion, ranks the cells according to the second parameter values of the cells, and determines the top N cells in the ranking, where N is a positive integer; and when the terminal determines to perform cell selection, performs cell selection according to the service duration of the top N cells, and determines the cell with the longest service duration among the top N cells.

[0161] For example, N is 3, the terminal calculates a second parameter value of the cells according to a cell ranking criterion, ranks the cells according to the second parameter values of the cells, and determines the top 3 cells in the ranking, where the top 3 cells are not limited to 3 cells, and the rankings of multiple cells can be the same, for example, two cells are ranked first, one cell is ranked second, and three cells are ranked third.

[0162] In some embodiments, the terminal calculates a second parameter value of the cells according to a cell ranking criterion, including: calculating a second parameter value of a cell satisfying a second criterion according to the cell ranking criterion, where the cell satisfying the second criterion is a cell with a cell selection level greater than 0 and a cell selection quality greater than 0.

[0163] In some embodiments, the second criterion is the S criterion.

[0164] In some embodiments, the cell ranking criterion is the R criterion, where if the cell is a serving cell, the second parameter value of the cell is the RSRP of the cell plus a cell reselection hysteresis value minus a temporary offset value; and if the cell is a neighbor cell, the second parameter value of the cell is the RSRP of the cell minus an offset value minus a temporary offset value.

[0165] For example, the terminal ranks the R values of the cells according to the R criterion, selects N cells with the best R values, and then selects a cell with the longest service duration from the N cells with the best R values.

[0166] For example, the terminal ranks the R values of the cells according to the R criterion, selects N cells with the best R values, and then selects a cell with the longest service duration from the N cells with the best R values, where the longest service duration is determined according to at least one of the coverage, the orbital height, the downtilt angle, the elevation angle, and the service time of the cell.

[0167] It can be understood that the terminal can determine the value of N based on a protocol agreement, or determine the value of N based on implementation, or also determine the value of N based on an indication of a network device.

[0168] In some embodiments, the terminal receives second indication information sent by the network device, where the second indication information is used to indicate the value of N.

[0169] In the embodiments of the present disclosure, the network device can send second indication information to the terminal to indicate the value of N, so that the terminal can determine the value of N according to the second indication information sent by the network device.

[0170] In some embodiments, the terminal receives third indication information sent by the network device, where the third indication information is used to instruct the terminal to determine, when performing cell selection, to calculate a second parameter value of a cell according to a cell ranking criterion, to rank the cells according to the second parameter values of the cells, to determine the top N cells in the ranking, and to perform cell selection according to the service durations of the top N cells.

[0171] In the embodiments of the present disclosure, the network device can send third indication information to the terminal to instruct the terminal, when performing cell selection, to calculate a second parameter value of a cell according to a cell ranking criterion, to rank the cells according to the second parameter values of the cells, to determine the top N cells in the ranking, and to perform cell selection according to the service durations of the top N cells, and to determine the cell with the longest service duration among the top N cells in the ranking.

[0172] In some embodiments, the third indication information is optional, that is, the network device does not send the third indication information, and the second indication information sent by the network device is also used to instruct the terminal, when performing cell selection, to calculate a second parameter value of a cell according to a cell ranking criterion, to rank the cells according to the second parameter values of the cells, to determine the top N cells in the ranking, and to perform cell selection according to the service durations of the top N cells.

[0173] In some embodiments, when performing cell selection, the terminal performs cell selection according to the first parameter of the cell.

[0174] In some embodiments, when performing cell selection, the terminal performs cell selection according to the first parameter of the cell, including at least one of the following:

[0175] When performing cell selection, according to the service duration of the cell, the cell with the longest service duration is determined to be selected to serve the terminal, where the first parameter includes the service duration.

[0176] When performing cell selection, according to the coverage range of the cell, the cell with the largest coverage range is determined to be selected, where the first parameter includes the coverage range.

[0177] When performing cell selection, according to the orbital height of the cell, the cell with the highest orbital height is determined to be selected, where the first parameter includes the orbital height.

[0178] When performing cell selection, a cell with a maximum downtilt angle is determined according to the downtilt angle of the cell, wherein the first parameter comprises the downtilt angle.

[0179] When performing cell selection, a cell with a latest service time end is determined according to the service time of the cell, wherein the first parameter comprises the service time.

[0180] In some embodiments, the method further comprises: receiving, by the terminal, first indication information sent by the network device, wherein the first indication information is used to indicate the first parameter of the cell; and determining the first parameter of the cell according to the first indication information.

[0181] In some embodiments, when performing cell selection, the terminal performs cell selection according to the first parameter of the cell, comprising: calculating a second parameter value of the cell according to a cell ranking criterion, wherein the cell ranking criterion is an R criterion; ranking the cells according to the second parameter value of the cell to determine the top N cells in the ranking, wherein N is a positive integer; and performing cell selection according to the first parameter of the top N cells in the ranking.

[0182] In some embodiments, the method further comprises: receiving, by the terminal, second indication information sent by the network device, wherein the second indication information is used to indicate the value of N.

[0183] In some embodiments, the method further comprises: receiving, by the terminal, third indication information sent by the network device, wherein the third indication information is used to indicate that the terminal calculates the second parameter value of the cell according to the cell ranking criterion, ranks the cells according to the second parameter value of the cell to determine the top N cells in the ranking, and performs cell selection according to the first parameter of the top N cells in the ranking.

[0184] In some embodiments, the method further comprises: sending, by the terminal, fourth indication information to the network device, wherein the fourth indication information is used to indicate that the terminal performs cell selection according to the first parameter of the cell when performing cell selection.

[0185] In some embodiments, sending, by the terminal, the fourth indication information to the network device comprises: determining that a first condition is met, and sending the fourth indication information to the network device; wherein the first condition comprises at least one of the following: the terminal predicts that a service demand is lower than a service demand threshold; the terminal predicts that an electricity level is lower than an electricity level threshold; and the terminal enters a power saving mode.

[0186] In some embodiments, the method further comprises: receiving, by the terminal, fifth indication information sent by the network device, wherein the fifth indication information is used to indicate that the terminal performs cell selection according to the first parameter of the cell when performing cell selection.

[0187] By implementing the embodiments of the present disclosure, the terminal can select a cell with the longest service duration for cell selection / cell reselection according to the service duration of the cell, thereby reducing the number of times of cell reselection of the terminal, reducing the power consumption of the terminal, and saving energy.

[0188] In some embodiments, the names of information and the like 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", "codebook", "codeword", "code point", "bit", "data", "program", "chip", and the like can be replaced with each other.

[0189] In some embodiments, terms such as "time", "time point", "time", "time position", and the like can be replaced with each other, and terms such as "duration", "period", "time window", "window", "time", and the like can be replaced with each other.

[0190] In some embodiments, terms such as "component carrier (CC)", "cell", "frequency carrier", "carrier frequency", and the like can be replaced with each other.

[0191] In some embodiments, "acquire", "obtain", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be replaced with each other, and can be interpreted as receiving from other subjects, obtaining from protocols, obtaining from higher layers, processing to obtain, and various meanings such as autonomous implementation.

[0192] In some embodiments, terms such as "send", "transmit", "report", "issue", "transmit", "bidirectional transmission", "send and / or receive" can be replaced with each other.

[0193] In some embodiments, the terms "certain", "preset", "pre-set", "set", "indicated", "a certain", "any", "first", and the like can be replaced with each other, and "certain A", "preset A", "pre-set A", "set A", "indicated A", "a certain A", "any A", "first A" can be interpreted as A predetermined in a protocol or the like, or A obtained by setting, configuration, or indication, or a certain A, a certain A, any A, or first A, but are not limited thereto.

[0194] 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.

[0195] The communication method related to the embodiments of the present disclosure can include at least one of S301A-S302A. For example, S301A can be implemented as an independent embodiment, and S302A can be implemented as an independent embodiment, but is not limited thereto.

[0196] In some embodiments, S301A is optional, and one or more of the steps can be omitted or replaced in different embodiments.

[0197] In some embodiments, reference can be made to other optional implementations described before or after the description corresponding to FIG. 3A.

[0198] FIG. 3B is an interaction schematic diagram of a cell selection method according to an embodiment of the present disclosure. As shown in FIG. 3B, the embodiments of the present disclosure relate to a cell selection method, and the method includes:

[0199] S301B, the network device sends fifth indication information to the terminal.

[0200] The fifth indication information is used to instruct the terminal to determine to perform cell selection according to the service duration of the cell when performing cell selection.

[0201] In the embodiments of the present disclosure, the network device can instruct the terminal to use a recommended cell reselection method, and the network device sends the fifth indication information to the terminal, instructing the terminal to perform cell selection according to the service duration of the cell when performing cell selection.

[0202] In some embodiments, the cell selection performed by the terminal includes cell selection and cell reselection.

[0203] In some embodiments, when the terminal performs cell selection, there are multiple cells including a serving cell and at least one neighbor cell.

[0204] In some embodiments, the fifth indication information can be the first indication information, that is, the network device can indicate the terminal to perform cell selection or cell reselection according to the service duration of the cell by sending the first parameter in the first indication information.

[0205] In some embodiments, the network device additionally sends the fifth indication information on the basis of sending the first indication information, that is, the network device indicates the terminal to perform cell selection or cell reselection according to the service duration by sending the fifth indication information and the first indication information.

[0206] S302B, the network device sends the first indication information to the terminal.

[0207] The first indication information is used to indicate the first parameter of the cell.

[0208] S302B and S301B can be executed simultaneously or in an exchanged order.

[0209] In some embodiments, the network device sends a first message to the terminal, where the first message carries the fifth indication information and the first indication information.

[0210] In the embodiments of the present disclosure, the network device can send the first indication information to the terminal, and the first indication information is used to indicate the first parameter of the cell. Thus, the terminal can determine the first parameter of the cell according to the first indication information sent by the network device.

[0211] It can be understood that the network device can provide the first parameter of the neighbor cell to the terminal through the serving cell.

[0212] In the embodiments of the present disclosure, the first indication information is used to indicate the first parameter of the cell, the first parameter of the cell is used for the terminal to determine the service duration of the cell, and the service duration of the cell is used for the terminal to determine to perform cell selection according to the service duration of the cell; or the first parameter of the cell is used for the terminal to determine the cell with the longest service duration, and the cell with the longest service duration is used for the terminal to determine to select the cell with the longest service duration when performing cell selection.

[0213] The first parameter includes at least one of the following: coverage range; track height; downtilt angle; elevation angle; and service time.

[0214] In some embodiments, S301B is optional, that is, the network device does not send the fifth indication information, and the first indication information sent by the network device is also used to indicate the terminal to perform cell selection according to the service duration of the cell when performing cell selection.

[0215] In some embodiments, the fifth indication information is the same as the first indication information, i.e., the first indication information can be the fifth indication information, and the first indication information is further used to indicate that the terminal determines to perform cell selection according to the service duration of the cell.

[0216] In some embodiments, the fifth indication information is the same as the first indication information, i.e., the first indication information can be the fifth indication information, and the fifth indication information is further used to indicate the first parameter of the cell.

[0217] In some embodiments, the terminal determines the service duration of the cell according to the first parameter of the cell, and determines to perform cell selection according to the service duration of the cell, or determines the cell with the longest service duration according to the first parameter of the cell, and determines to select the cell with the longest service duration when performing cell selection.

[0218] The optional implementation of S303B can refer to the optional implementation of S301A in FIG. 3A and other associated parts in the embodiments involved in FIG. 3A, which will not be described here.

[0219] In the embodiments of the present disclosure, the terminal determines the service duration of the cell according to the first parameter of the cell, and performs cell selection according to the service duration of the cell when performing cell selection.

[0220] In the embodiments of the present disclosure, the terminal determines the cell with the longest service duration according to the first parameter of the cell, and selects the cell with the longest service duration when performing cell selection.

[0221] In some embodiments, the terminal receives the fifth indication information and the first indication information sent by the network device, and in the case that the fifth indication information is used to indicate that the terminal determines to perform cell selection according to the service duration of the cell, and the first indication information is used to indicate the first parameter of the cell, the terminal can determine the service duration of the cell according to the first parameter of the cell, and determine to perform cell selection according to the service duration of the cell.

[0222] In some embodiments, the terminal receives the fifth indication information and the first indication information sent by the network device, and in the case that the fifth indication information is used to indicate that the terminal determines to perform cell selection according to the service duration of the cell, and the first indication information is used to indicate the first parameter of the cell, the terminal can determine the cell with the longest service duration according to the first parameter of the cell, and determine to select the cell with the longest service duration when performing cell selection.

[0223] In some embodiments, the fifth indication information is the first indication information, the terminal receives the first indication information sent by the network device, performs cell selection according to the service duration of the cell, and in the case that the first indication information is used to indicate the first parameter of the cell, the terminal can determine the cell with the longest service duration according to the first parameter of the cell, and determine to select the cell with the longest service duration when performing cell selection.

[0224] It can be understood that the terminal selects the cell that can provide the terminal with the longest service duration, which can avoid frequent cell selection / reselection, reduce the number of cell reselection, reduce terminal power consumption, and save energy.

[0225] It can be understood that the cell with a larger coverage range can provide the terminal with a longer service duration, and therefore, the terminal determines the service duration of the cell according to the coverage range of the cell, or determines the cell that can provide the terminal with the longest service duration.

[0226] It can be understood that the cell with a higher orbital height has a larger coverage area and can provide the terminal with a longer service duration, and therefore, the terminal determines the service duration of the cell according to the orbital height of the cell, or determines the cell with the highest orbital height as the cell that can provide the terminal with the longest service duration.

[0227] It can be understood that the cell with a larger downtilt angle has a larger coverage area and can provide the terminal with a longer service duration, and therefore, the terminal determines the service duration of the cell according to the downtilt angle of the cell, or determines the cell with the largest downtilt angle as the cell that can provide the terminal with the longest service duration.

[0228] It can be understood that the cell with a smaller elevation angle has a larger coverage area and can provide the terminal with a longer service duration, and therefore, the terminal determines the service duration of the cell according to the elevation angle of the cell, or determines the cell with the smallest elevation angle as the cell that can provide the terminal with the longest service duration.

[0229] It can be understood that the service time of different cells is different, and the terminal can determine the service duration of the cell according to the service time of the cell, or determine the cell that can provide the terminal with the longest service duration.

[0230] In some embodiments, the terminal determines the cell providing service to the terminal for the longest duration according to the first parameter of the cell, including: determining the cell with the largest coverage range as the cell providing service to the terminal for the longest duration according to the coverage range of the cell, wherein the first parameter includes the coverage range; or determining the cell with the highest orbital height as the cell providing service to the terminal for the longest duration according to the orbital height of the cell, wherein the first parameter includes the orbital height; or determining the cell with the largest downtilt angle as the cell providing service to the terminal for the longest duration according to the downtilt angle of the cell, wherein the first parameter includes the downtilt angle; or determining the cell with the smallest elevation angle as the cell providing service to the terminal for the longest duration according to the elevation angle of the cell, wherein the first parameter includes the elevation angle; or determining the cell with the latest end time of service time as the cell providing service to the terminal for the longest duration according to the service time of the cell, wherein the first parameter includes the service time.

[0231] It can be understood that in the embodiments of the present disclosure, the terminal determines the cell providing service to the terminal for the longest duration according to at least one of the coverage range, the orbital height, the downtilt angle, the elevation angle and the service time of the cell, wherein the cell with the largest coverage range, the highest orbital height, the largest downtilt angle, the smallest elevation angle and the latest end time of service time is determined as the cell providing service to the terminal for the longest duration; wherein the determination order of the cell with the largest coverage range, the highest orbital height, the largest downtilt angle, the smallest elevation angle and the latest end time of service time can be arbitrarily set as needed, and the embodiments of the present disclosure are not exemplified one by one.

[0232] By implementing the embodiments of the present disclosure, the terminal can select the cell with the longest service duration for cell selection / cell reselection according to the service duration of the cell, which can reduce the number of times of cell reselection of the terminal, reduce the power consumption of the terminal, and save energy.

[0233] The communication method related to the embodiments of the present disclosure can include at least one of S301B-S303B. For example, S301B can be implemented as an independent embodiment, S302B can be implemented as an independent embodiment, and S303B can be implemented as an independent embodiment, but is not limited thereto.

[0234] In some embodiments, S301B is optional, and one or more of the steps can be omitted or replaced in different embodiments.

[0235] In some embodiments, other optional implementations described before or after the description corresponding to FIG. 3B can be referred to.

[0236] FIG. 3C is an interaction schematic diagram of a cell selection method according to an embodiment of the present disclosure. As shown in FIG. 3C, the embodiments of the present disclosure relate to a cell selection method, and the above method includes:

[0237] S301C, the terminal sends fourth indication information to the network device.

[0238] The fourth indication information is used to indicate that the terminal determines to perform cell selection according to the service duration of the cell.

[0239] In the embodiments of the present disclosure, the terminal can indicate the cell reselection method recommended by the terminal to the network device, for example, indicating the network device that the terminal performs cell selection according to the service duration of the cell.

[0240] In the embodiments of the present disclosure, the network device receives the fourth indication information sent by the terminal, and in the case that the fourth indication information indicates that the terminal determines to perform cell selection according to the service duration of the cell, the network device can configure the terminal to determine to perform cell selection according to the service duration of the cell.

[0241] In some embodiments, the terminal sends the fourth indication information to the network device, including: determining to satisfy the first condition, and sending the fourth indication information to the network device.

[0242] The first condition includes at least one of the following: the terminal predicts that the service demand is lower than a service demand threshold; the terminal power is lower than a power threshold; and the terminal enters a power saving mode.

[0243] In the embodiments of the present disclosure, the terminal sends the fourth indication information to the network device in the case that the terminal predicts that the service demand is lower than the service demand threshold.

[0244] In the embodiments of the present disclosure, the terminal sends the fourth indication information to the network device in the case that the terminal power is lower than the power threshold.

[0245] In the embodiments of the present disclosure, the terminal sends the fourth indication information to the network device in the case that the terminal enters the power saving mode.

[0246] S302C, the network device sends first indication information to the terminal.

[0247] The first indication information is used to indicate the first parameter of the cell; and the first parameter of the cell is determined according to the first indication information.

[0248] The optional implementation of S302C can refer to the optional implementation of S302B in FIG. 3B and other related parts in the embodiments involved in FIG. 3B, which will not be described here.

[0249] S302C and S301C can be executed simultaneously or in an exchanged order.

[0250] S303C, the terminal determines a service duration of the cell according to the first parameter of the cell, and determines to perform cell selection according to the service duration of the cell; or determines a selection with the longest service duration according to the first parameter of the cell, and determines to select the cell with the longest service duration when performing cell selection.

[0251] The optional implementation of S303C can refer to the optional implementation of S301A in FIG. 3A and other associated parts in the embodiments involved in FIG. 3A, which will not be repeated here.

[0252] The optional implementation of S303C can refer to the optional implementation of S303B in FIG. 3B and other associated parts in the embodiments involved in FIG. 3B, which will not be repeated here.

[0253] The communication method involved in the embodiments of the present disclosure can include at least one of S301C-S302C. For example, S301C can be implemented as an independent embodiment, S302C can be implemented as an independent embodiment, S303C can be implemented as an independent embodiment, and S302C+S303C can be implemented as an independent embodiment, but is not limited thereto.

[0254] In some embodiments, S301C is optional, and one or more of the steps can be omitted or replaced in different embodiments.

[0255] In some embodiments, other optional implementations can be described before or after the description of FIG. 3C.

[0256] FIG. 5A is a flow diagram of a cell selection method according to an embodiment of the present disclosure. As shown in FIG. 5A, the embodiments of the present disclosure involve a cell selection method, which is performed by a terminal, and the method includes:

[0257] S501A, acquiring fifth indication information.

[0258] The optional implementation of S501A can refer to the optional implementation of S301B in FIG. 3B and other associated parts in the embodiments involved in FIG. 3B, which will not be repeated here.

[0259] In some embodiments, the terminal receives the fifth indication information sent by the network device, but is not limited thereto, and can also receive the fifth indication information sent by other subjects.

[0260] In some embodiments, the terminal acquires the fifth indication information specified by a protocol.

[0261] In some embodiments, the terminal obtains the fifth indication information from upper layer(s), for example, the terminal obtains the indication information from an RRC release message.

[0262] In some embodiments, the terminal processes to obtain the fifth indication information.

[0263] In some embodiments, S501A is omitted, and the terminal autonomously implements the function indicated by the fifth indication information, or the above function is default or default.

[0264] The fifth indication information is used to indicate that the terminal determines to perform cell selection according to the service duration of the cell when performing cell selection.

[0265] In some embodiments, the fifth indication information can be the first indication information, that is, the network device can indicate the terminal to perform cell selection or cell reselection according to the service duration of the cell by sending the first parameter in the first indication information.

[0266] In some embodiments, the network device additionally sends the fifth indication information on the basis of sending the first indication information, that is, the network device indicates the terminal to perform cell selection or cell reselection according to the service duration by sending the fifth indication information and the first indication information.

[0267] S502A, obtaining the first indication information.

[0268] The S502A and the S501A can be executed simultaneously or in an exchange order.

[0269] The optional implementation of S502A can refer to the optional implementation of S302B in FIG. 3B and other related parts in the embodiments involved in FIG. 3B, which will not be repeated here.

[0270] In some embodiments, the terminal receives the first indication information sent by the network device, but is not limited thereto, and can also receive the first indication information sent by other subjects.

[0271] In some embodiments, the terminal obtains the first indication information specified by the protocol.

[0272] In some embodiments, the terminal obtains the first indication information from upper layer(s), for example, the terminal obtains the first indication information from a system message or an RRC release message.

[0273] In some embodiments, the terminal processes to obtain the first indication information.

[0274] In some embodiments, S502A is omitted, and the terminal autonomously implements the function indicated by the first indication information, or the above function is default or default.

[0275] The first indication information is used for indicating a first parameter of the cell; the first parameter of the cell is used by the terminal to determine a service duration of the cell, the service duration of the cell is used by the terminal to determine, when performing cell selection, to perform cell selection according to the service duration of the cell; or the first parameter of the cell is used by the terminal to determine a cell with the longest service duration, and the cell with the longest service duration is used by the terminal to determine, when performing cell selection, to select the cell with the longest service duration.

[0276] In some embodiments, S501A is optional, that is, the network device does not send the fifth indication information, and the first indication information sent by the network device is also used to indicate that, when performing cell selection, the terminal performs cell selection according to the service duration of the cell.

[0277] In some embodiments, the fifth indication information is the same information as the first indication information, that is, the fifth indication information can be the first indication information, and the first indication information is also used to indicate that, when performing cell selection, the terminal performs cell selection according to the service duration of the cell.

[0278] In some embodiments, the fifth indication information is the same information as the first indication information, that is, the first indication information can be the fifth indication information, and the fifth indication information is also used to indicate the first parameter of the cell.

[0279] S503A, according to the first parameter of the cell, determines the service duration of the cell, and determines, when performing cell selection, to perform cell selection according to the service duration of the cell, or according to the first parameter of the cell, determines a cell with the longest service duration, and determines, when performing cell selection, to select the cell with the longest service duration.

[0280] The optional implementation of S503A can refer to the optional implementation of S303B in FIG. 3B and other related parts in the embodiments involved in FIG. 3B, which will not be repeated here.

[0281] By implementing the embodiments of the present disclosure, the terminal can select the cell with the longest service duration to perform cell selection / cell reselection according to the service duration of the cell, which can reduce the number of times of cell reselection of the terminal, reduce the power consumption of the terminal, and save energy.

[0282] In some examples, the fifth indication information is the first indication information, that is, at this time, the terminal only needs to obtain the first indication information.

[0283] The communication method related to the embodiments of the present disclosure can include at least one of S501A-S503A. For example, S501A can be implemented as an independent embodiment, S502A can be implemented as an independent embodiment, S503A can be implemented as an independent embodiment, and S502A+S503A can be implemented as an independent embodiment, but is not limited thereto.

[0284] In some embodiments, S501A is optional, and one or more of the steps can be omitted or replaced in different embodiments.

[0285] In some embodiments, refer to the other optional implementations described before or after the description corresponding to FIG. 5A.

[0286] FIG. 5B is a flow diagram of a cell selection method according to an embodiment of the present disclosure. As shown in FIG. 5B, the embodiment of the present disclosure relates to a cell selection method, the method is performed by a terminal, and the method comprises the following steps:

[0287] S501B, sending fourth indication information.

[0288] The optional implementation of S501B can refer to the optional implementation of S301C in FIG. 3C and other related parts in the embodiments involved in FIG. 3C, which will not be repeated here.

[0289] In some embodiments, the terminal sends the fourth indication information to the network device, but is not limited thereto, and can send the fourth indication information to other subjects.

[0290] Optionally, the fourth indication information is used for the network device to determine the cell selection of the terminal according to the service duration of the cell when the terminal determines to perform cell selection.

[0291] The fourth indication information is used to indicate the cell selection of the terminal according to the service duration of the cell when the terminal determines to perform cell selection.

[0292] S502B, obtaining first indication information.

[0293] S502B and S501B can be executed simultaneously or in an exchanged order.

[0294] The optional implementation of S502B can refer to the optional implementation of S302C in FIG. 3C and other related parts in the embodiments involved in FIG. 3C, which will not be repeated here.

[0295] In some embodiments, the terminal receives the first indication information sent by the network device, but is not limited thereto, and can receive the first indication information sent by other subjects.

[0296] In some embodiments, the terminal obtains the first indication information specified by a protocol.

[0297] In some embodiments, the terminal obtains the first indication information from an upper layer.

[0298] In some embodiments, the terminal processes to obtain the first indication information.

[0299] In some embodiments, S502B is omitted, the terminal autonomously implements the function indicated by the first indication information, or the above function is default or default.

[0300] The first indication information is used to indicate a first parameter of the cell; the first parameter of the cell is used for the terminal to determine a service duration of the cell, the service duration of the cell is used for the terminal to determine to perform cell selection according to the service duration of the cell when performing cell selection; or the first parameter of the cell is used for the terminal to determine a cell with the longest service duration, and the cell with the longest service duration is used for the terminal to determine to select the cell with the longest service duration when performing cell selection.

[0301] S503B, according to the first parameter of the cell, determines a service duration of the cell, and determines to perform cell selection according to the service duration of the cell; or according to the first parameter of the cell, determines a cell with the longest service duration, and determines to select the cell with the longest service duration when performing cell selection.

[0302] The optional implementation of S503B can refer to the optional implementation of S303C in FIG. 3C and other associated parts in the embodiments involved in FIG. 3C, which will not be repeated here.

[0303] By implementing the embodiments of the present disclosure, the terminal can select the cell with the longest service duration to perform cell selection / cell reselection according to the service duration of the cell, which can reduce the number of times of cell reselection of the terminal, reduce the power consumption of the terminal, and save energy.

[0304] The communication method related to the embodiments of the present disclosure can include at least one of S501B-S503B. For example, S501B can be implemented as an independent embodiment, S502B can be implemented as an independent embodiment, S503B can be implemented as an independent embodiment, and S502B+S503B can be implemented as an independent embodiment, but is not limited thereto.

[0305] In some embodiments, S501B is optional, and one or more of the steps can be omitted or replaced in different embodiments.

[0306] In some embodiments, other optional implementation manners can be described before or after the description of FIG. 5B.

[0307] FIG. 6A is a flow diagram of a cell selection method according to an embodiment of the present disclosure. As shown in FIG. 6A, the present disclosure relates to a cell selection method, and the above method is performed by a network device, and the above method includes:

[0308] S601A, sending fifth indication information.

[0309] The optional implementation of S601A can refer to the optional implementation of S301B in FIG. 3B and other associated parts in the embodiments related to FIG. 3B, which will not be repeated here.

[0310] In some embodiments, the network device sends the fifth indication information to the terminal, but is not limited thereto, and can also send the fifth indication information to other subjects.

[0311] Optionally, the fifth indication information is used for the terminal to determine, when performing cell selection, to perform cell selection according to the service duration of the cell. The optional implementation thereof can refer to the optional implementation of S303B in FIG. 3B and other associated parts in the embodiments related to FIG. 3B, which will not be repeated here.

[0312] The fifth indication information is used to instruct the terminal, when determining to perform cell selection, to perform cell selection according to the service duration of the cell.

[0313] In some embodiments, the fifth indication information can be the first indication information, that is, the network device can instruct the terminal to perform cell selection or cell reselection according to the service duration of the cell by sending the first parameter in the first indication information.

[0314] In some embodiments, the network device additionally sends the fifth indication information on the basis of sending the first indication information, that is, the network device instructs the terminal to perform cell selection or cell reselection according to the service duration by sending the fifth indication information and the first indication information.

[0315] S602A, sending the first indication information.

[0316] The optional implementation of S602A can refer to the optional implementation of S303B in FIG. 3B and other associated parts in the embodiments related to FIG. 3B, which will not be repeated here.

[0317] In some embodiments, the network device sends the first indication information to the terminal, but is not limited thereto, and can also send the first indication information to other subjects.

[0318] Optionally, the first indication information is used to instruct the first parameter of the cell, the first parameter of the cell is used for the terminal to determine the service duration of the cell, and the service duration of the cell is used for the terminal to determine, when performing cell selection, to perform cell selection according to the service duration of the cell; or the first parameter of the cell is used for the terminal to determine the cell with the longest service duration, and the cell with the longest service duration is used for the terminal to determine, when performing cell selection, to select the cell with the longest service duration. The optional implementation thereof can refer to the optional implementation of S303B in FIG. 3B and other associated parts in the embodiments related to FIG. 3B, which will not be repeated here.

[0319] In some embodiments, S601A is optional, i.e., the network device does not send the fifth indication information, and the first indication information sent by the network device is also used to instruct the terminal to determine, when performing cell selection, to perform cell selection according to the service duration of the cell.

[0320] In some embodiments, the fifth indication information is the same information as the first indication information, i.e., the fifth indication information can be the first indication information, and the first indication information is also used to instruct the terminal to determine, when performing cell selection, to perform cell selection according to the service duration of the cell.

[0321] In some embodiments, the fifth indication information is the same information as the first indication information, i.e., the first indication information can be the fifth indication information, and the fifth indication information is also used to indicate the first parameter of the cell.

[0322] By implementing the embodiments of the present disclosure, the network device instructs the terminal to perform cell selection according to the service duration of the cell, the terminal can select the cell with the longest service duration to perform cell selection / cell reselection, which can reduce the number of times of cell reselection of the terminal, reduce the power consumption of the terminal, and save energy.

[0323] The communication method related to the embodiments of the present disclosure can include at least one of S601A-S602A. For example, S601A can be implemented as an independent embodiment, and S602A can be implemented as an independent embodiment, but is not limited thereto.

[0324] In some embodiments, S601A is optional, and one or more of the steps can be omitted or replaced in different embodiments.

[0325] In some embodiments, S602A is optional, and one or more of the steps can be omitted or replaced in different embodiments.

[0326] In some embodiments, other optional implementation manners described before or after the description of FIG. 6A can be referred to.

[0327] FIG. 6B is a flow diagram of a cell selection method according to an embodiment of the present disclosure. As shown in FIG. 6B, the embodiments of the present disclosure relate to a cell selection method, the above method is performed by a network device, and the above method includes:

[0328] S601B, obtaining fourth indication information.

[0329] The optional implementation manners of S601B can be referred to the optional implementation manners of S301C of FIG. 3C and other related parts in the embodiments related to FIG. 3C, which will not be described herein.

[0330] In some embodiments, the network device receives the fourth indication information sent by the terminal, but is not limited thereto, and can also receive the fourth indication information sent by other subjects.

[0331] In some embodiments, the network device acquires the fourth indication information specified by a protocol.

[0332] In some embodiments, the network device acquires the fourth indication information from upper layer(s).

[0333] In some embodiments, the network device processes to obtain the fourth indication information.

[0334] In some embodiments, S601B is omitted, and the network device autonomously implements the function indicated by the fourth indication information, or the above function is default or default.

[0335] In some embodiments, the fourth indication information is used to instruct the terminal to determine to perform cell selection according to the service duration of the cell when performing cell selection.

[0336] S602B, sending the first indication information.

[0337] The optional implementation of S602B can refer to the optional implementation of S303C in FIG. 3C and other associated parts in the embodiments involved in FIG. 3C, which will not be repeated here.

[0338] In some embodiments, the network device sends the first indication information to the terminal, but is not limited thereto, and can also send the first indication information to other subjects.

[0339] Optionally, the above first indication information is used to indicate a first parameter of the cell, the first parameter of the cell is used by the terminal to determine the service duration of the cell, and the service duration of the cell is used by the terminal to determine to perform cell selection according to the service duration of the cell when performing cell selection; or the first parameter of the cell is used by the terminal to determine the cell with the longest service duration, and the cell with the longest service duration is used by the terminal to determine to select the cell with the longest service duration when performing cell selection. The optional implementation thereof can refer to the optional implementation of S303C in FIG. 3C and other associated parts in the embodiments involved in FIG. 3C, which will not be repeated here.

[0340] By implementing the embodiments of the present disclosure, the network device can determine that the terminal performs cell selection according to the service duration of the cell, and can keep the communication with the terminal in synchronization, so as to reduce the number of times of cell reselection of the terminal, reduce the power consumption of the terminal, and save energy when the terminal selects the cell with the longest service duration to perform cell selection / cell reselection.

[0341] The communication method related to the embodiments of the present disclosure can include at least one of S601B-S602B. For example, S601B can be implemented as an independent embodiment, and S602B can be implemented as an independent embodiment, but is not limited thereto.

[0342] In some embodiments, S601B is optional, and one or more of the steps can be omitted or replaced in different embodiments.

[0343] In some embodiments, S602B is optional, and one or more of the steps can be omitted or replaced in different embodiments.

[0344] In some embodiments, other optional implementations described before or after the corresponding description of FIG. 6B can be referred to.

[0345] To facilitate understanding of the embodiments of the present disclosure, an exemplary embodiment is provided.

[0346] In the exemplary embodiment, for the non-geostationary satellite orbit (NGSO) scenario, due to the movement of the satellite, the RRC non-connected state UE has to perform frequent cell reselection, and thus frequent RRM measurement of the serving cell / neighbor cell is performed, resulting in increased power consumption of the UE. Therefore, a corresponding scheme is considered to reduce the reselection times of the UE and reduce the power consumption of the UE.

[0347] To reduce the cell reselection times of the RRC non-connected state UE and reduce the power consumption of the UE, the UE reselects to a cell that can provide the longest service time or the largest coverage range to the UE, and the service time or the coverage range is determined according to the orbital height, the downtilt angle, the elevation angle, or the service time of the cell. In addition, the UE can also be configured by the network to first sort the R values, and then determine the cell with the longest service time or the largest coverage area in the N best R value cells, and then the UE selects or reselects to the cell.

[0348] In some embodiments, a cell reselection method is provided, and the UE performs cell reselection according to the service time or the coverage range of the cell.

[0349] In some embodiments, the UE selects or reselects to a cell that provides the longest service time, or the UE selects or reselects to a cell that provides the largest coverage range.

[0350] In some embodiments, the service time or the coverage range is determined by one of the following: orbital height; downtilt angle; elevation angle; service time.

[0351] In some embodiments, the UE determines the service time or the coverage range of the cell through the above parameters.

[0352] In some embodiments, the higher the orbit height, the slower the satellite moves, the larger the possible coverage area, the longer the service time provided, and the UE selects or reselects to the cell with the highest orbit height.

[0353] In some embodiments, the greater the downtilt angle, the larger the coverage area, the longer the service time provided, and the UE selects or reselects to the cell with the largest downtilt angle.

[0354] In some embodiments, the smaller the elevation angle, the larger the coverage area, the longer the service time provided, and the UE selects or reselects to the cell with the smallest elevation angle.

[0355] In some embodiments, the service time, for an earth fixed cell, the network directly provides the service time of the serving cell, and the UE selects the cell with the longest service time.

[0356] In some embodiments, the UE can combine the above parameters to select or reselect a suitable cell, for example:

[0357] The UE selects the cell with the highest orbit height according to the orbit height, and if the orbit height contains multiple cells, the UE selects the cell with the largest downtilt angle or the smallest elevation angle or the longest service time from the multiple cells.

[0358] The UE selects the cell with the smallest elevation angle according to the elevation angle, and if the smallest elevation angle contains multiple cells, the UE selects the cell with the highest orbit height or the cell with the longest service time from the multiple cells.

[0359] The UE selects the cell with the largest downtilt angle according to the downtilt angle, and if the largest downtilt angle contains multiple cells, the UE selects the cell with the highest orbit height or the cell with the longest service time from the multiple cells.

[0360] In some embodiments, the serving cell provides at least one of the following parameters of the neighbor cell: orbit height; downtilt angle; elevation angle; service time.

[0361] In some embodiments, the UE sorts the R values of the cells according to the R criterion, selects N cells with the best R values, and then determines the cell with the longest service time or the largest coverage range from the N cells with the best R values, and the UE reselects or selects to the cell.

[0362] In some embodiments, N cells with the best R values are selected according to the R values, and the cell with the highest orbit is determined from the N cells, and the UE selects or reselects to the cell with the highest orbit.

[0363] In some embodiments, the network device configures the UE to determine the cell with the longest service time or the largest coverage range from the N cells with the best R values, and reselects or selects to the cell.

[0364] In some embodiments, the UE indicates to the network a UE-recommended cell reselection method, e.g., the UE indicates to the network that the UE recommends using cell reselection according to service duration or coverage range of a cell.

[0365] In some embodiments, the UE indicates to the network a UE-recommended cell reselection method, e.g., the UE indicates to the network that the UE recommends using cell reselection according to service duration or coverage range of a cell, when the UE predicts a low traffic demand, or the UE battery level is lower than a battery level threshold, or the UE wants to save power.

[0366] In some embodiments, the network device indicates to the UE to use the cell reselection according to service duration or coverage range of a cell.

[0367] It should be noted that all the above "configurations" can be configured by high layer signaling or physical layer signaling if not specifically stated.

[0368] Embodiments of the present disclosure also propose an apparatus for implementing any of the above methods, e.g., an apparatus comprising units or modules for implementing the steps performed by the devices (network device, sensing node, etc.) in any of the above methods.

[0369] It should be understood that the division of each unit or module in the above apparatus is only a logical function division, and all or part of them can be integrated into a physical entity or physically separated in actual implementation. In addition, the units or modules in the apparatus can be implemented in the form of processor calling software: for example, the apparatus includes a processor connected with a memory, the memory stores instructions, and the processor calls the instructions stored in the memory to implement any of the above methods or realize the functions of each unit or module of the above apparatus, wherein the processor is, for example, a general processor such as a central processing unit (CPU) or a microprocessor, and the memory is a memory in the apparatus or a memory outside the apparatus. Alternatively, the units or modules in the apparatus can be implemented in the form of hardware circuit, and the functions of part or all of the units or modules can be realized by the design of hardware circuit. The above hardware circuit can be understood as one or more processors; for example, in one implementation, the above hardware circuit is an application-specific integrated circuit (ASIC), and the functions of part or all of the above units or modules are realized by the design of the logical relationship of elements in the circuit; for example, in another implementation, the above hardware circuit is a programmable logic device (PLD), and a field programmable gate array (FPGA) is taken as an example, which can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by a configuration file, so as to realize the functions of part or all of the above units or modules. All units or modules of the above apparatus can be implemented in the form of processor calling software, or all units or modules can be implemented in the form of hardware circuit, or part of the units or modules are implemented in the form of processor calling software, and the remaining part is implemented in the form of hardware circuit.

[0370] In the embodiments of the present disclosure, the processor is a circuit with signal processing capability. In one implementation, the processor can be a circuit with instruction reading and running capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), a digital signal processor (DSP), and the like. In another implementation, the processor can implement certain functions through a logical relationship of hardware circuit, and the logical relationship of the 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 the reconfigurable hardware circuit, the processor loads a configuration document to implement the configuration of the hardware circuit. It can be understood that the processor loads instructions to implement the functions of the above part or all 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), and the like.

[0371] FIG. 7A is a structural schematic diagram of a terminal according to an embodiment of the present disclosure. As shown in FIG. 7A, the terminal 101 can include at least one of a transceiver module 1011, a processing module 1012, and the like.

[0372] In some embodiments, the processing module 1012 is configured to determine, when performing cell selection, to perform cell selection according to a service duration of a cell.

[0373] Optionally, the transceiver 1011 is configured to perform at least one of the communication steps (e.g., the communication steps of the terminal in S301A, S301B-S303B, S301C-S303C, S501A-S503A, S501B-S503B, but not limited to this) performed by the terminal 101 in any of the above methods. Details are not described herein again. Optionally, the processing module 1012 is configured to perform at least one of the other steps (e.g., the steps other than the communication steps of the terminal in S301A, S301B-S303B, S301C-S303C, S501A-S503A, S501B-S503B, but not limited to this) performed by the terminal 101 in any of the above methods. Details are not described herein again.

[0374] FIG. 7B is a structural schematic diagram of a network device according to an embodiment of the present disclosure. As shown in FIG. 7B, the network device 102 can include at least one of a transceiver 1021, a processing module 1022, etc.

[0375] In some embodiments, the transceiver 1021 is configured to send first indication information to the terminal, where the first indication information is used to indicate a first parameter of a cell, the first parameter of the cell is used by the terminal to determine a service duration of the cell, and the service duration of the cell is used by the terminal to determine that the cell selection is performed according to the service duration of the cell; or the first parameter of the cell is used by the terminal to determine a cell with the longest service duration, and the cell with the longest service duration is used by the terminal to determine that the cell selection is performed by selecting the cell with the longest service duration.

[0376] Optionally, the transceiver 1021 is configured to perform at least one of the communication steps (e.g., the communication steps of the network device in S301A, S301B-S303B, S301C-S303C, S601A-S602A, S601B-S602B, but not limited to this) performed by the network device 102 in any of the above methods. Details are not described herein again. Optionally, the processing module 1022 is configured to perform at least one of the other steps (e.g., the steps other than the communication steps of the network device in S301A, S301B-S303B, S301C-S303C, S601A-S602A, S601B-S602B, but not limited to this) performed by the network device 102 in any of the above methods. Details are not described herein again.

[0377] In some embodiments, the transceiver can include a sending module and / or a receiving module, and the sending module and the receiving module can be separate or integrated together. Optionally, the transceiver can be replaced by a transceiver.

[0378] In some embodiments, the processing module can be one module, or can include multiple sub-modules. Optionally, the multiple sub-modules perform all or part of the steps required to be performed by the processing module, respectively. Optionally, the processing module can be mutually replaced with the processor.

[0379] FIG. 8A is a structural schematic diagram of a communication device 8100 according to the embodiments of the present disclosure. The communication device 8100 can be a network device (for example, an access network device, a core network device, a sensing node, etc.), a terminal (for example, a user equipment UE, a sensing node, etc.), a chip, a chip system, or a processor supporting the network device to implement any of the above methods, or a chip, a chip system, or a processor supporting the terminal to implement any of the above methods. The communication device 8100 can be used to implement the methods described in the above method embodiments, and specific implementation can be referred to the description in the above method embodiments.

[0380] As shown in FIG. 8A, the communication device 8100 includes one or more processors 8101. The processor 8101 can be a general-purpose processor or a special-purpose processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control the communication device (for example, a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute programs, and process data of the programs. Optionally, the communication device 8100 is used to execute any of the above methods. Optionally, the one or more processors 8101 are used to call instructions to enable the communication device 8100 to execute any of the above methods.

[0381] In some embodiments, the communication device 8100 further includes one or more transceivers 8103. When the communication device 8100 includes one or more transceivers 8103, the transceiver 8103 performs at least one of the communication steps (e.g., the transmission and / or reception communication steps in S301A, S301B-S303B, S301C-S303C, S501A-S503A, S501B-S503B, S601A-S602A, S601B-S602B, but not limited to) in the above-described methods, and the processor 8101 performs at least one of the other steps (e.g., the steps other than the transmission and / or reception communication steps in S301A, S301B-S303B, S301C-S303C, S501A-S503A, S501B-S503B, S601A-S602A, S601B-S602B, but not limited to) in the above-described methods. In optional embodiments, the transceiver can include a receiver and / or a transmitter, which can be separate or integrated together. Optionally, the terms transceiver, transceiving unit, transceiver, transceiving circuit, interface circuit, interface, etc. can be replaced with each other, and the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc. can be replaced with each other, and the terms receiver, receiving unit, receiver, receiving circuit, etc. can be replaced with each other.

[0382] In some embodiments, the communication device 8100 further includes one or more memories 8102 for storing data. Optionally, all or part of the memory 8102 can also be outside the communication device 8100. In optional embodiments, the communication device 8100 can include one or more interface circuits 8104. Optionally, the interface circuit 8104 is connected with the memory 8102, and the interface circuit 8104 can be used to receive data from the memory 8102 or other devices, and can be used to send data to the memory 8102 or other devices. For example, the interface circuit 8104 can read the data stored in the memory 8102 and send the data to the processor 8101.

[0383] The communication device 8100 described in the above embodiments can be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 can not be limited by FIG. 8A. The communication device can be a standalone device or can be part of a larger device. For example, the communication device can be: 1) a standalone integrated circuit (IC), or a chip, or a chip system or subsystem; (2) a set of one or more ICs, which can optionally also include storage components for storing data, programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, a smart terminal device, a cellular phone, a wireless device, a handset, a mobile unit, a vehicle-mounted device, a network device, a cloud device, an artificial intelligence device, and the like; (6) other devices, and the like.

[0384] FIG. 8B is a structural schematic diagram of a chip 8200 according to an embodiment of the present disclosure. For the case where the communication device 8100 is a chip or a chip system, the structural schematic diagram of the chip 8200 shown in FIG. 8B can be referred to, but is not limited thereto.

[0385] The chip 8200 includes one or more processors 8201. The chip 8200 is configured to execute any of the above methods.

[0386] In some embodiments, the chip 8200 further includes one or more interface circuits 8202. Optionally, the terms interface circuit, interface, transceiver pin, and the like can be replaced with each other. In some embodiments, the chip 8200 further includes one or more memories 8203 for storing data. Optionally, all or part of the memory 8203 can be outside the chip 8200. Optionally, the interface circuit 8202 is connected to the memory 8203, and the interface circuit 8202 can be configured to receive data from the memory 8203 or other devices, and the interface circuit 8202 can be configured to send data to the memory 8203 or other devices. For example, the interface circuit 8202 can read data stored in the memory 8203 and send the data to the processor 8201.

[0387] In some embodiments, the interface circuit 8202 performs at least one of the communication steps (e.g., the communication steps of transmitting and / or receiving in S301A-S303A, S301B-S305B, S301C-S305C, S401A-S403A, S401B-S405B, S401C-S405C, S501A-S502A, S501B-S502B, S501C-S502C, but not limited to this) in the above method. The interface circuit 8202 performing the communication steps such as transmitting and / or receiving in the above method means that the interface circuit 8202 performs data interaction between the processor 8201, the chip 8200, the memory 8203, or the transceiver device. In some embodiments, the processor 8201 performs at least one of the other steps (e.g., the other steps in S301A-S303A, S301B-S305B, S301C-S305C, S401A-S403A, S401B-S405B, S401C-S405C, S501A-S502A, S501B-S502B, S501C-S502C, but not limited to this) in the above method.

[0388] The disclosure also proposes a storage medium, and the above storage medium stores instructions, and when the instructions run on the communication device 8100, the communication device 8100 performs any one of the above methods. Optionally, the above storage medium is an electronic storage medium. Optionally, the above storage medium is a computer readable storage medium, but is not limited to this, and it can also be a storage medium readable by other devices. Optionally, the above storage medium can be a non-transitory storage medium, but is not limited to this, and it can also be a transitory storage medium.

[0389] The disclosure also proposes a program product, and the above program product is executed by the communication device 8100, so that the communication device 8100 performs any one of the above methods. Optionally, the above program product is a computer program product.

[0390] The disclosure also proposes a computer program, and when it runs on a computer, the computer executes any one of the above methods.

[0391] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized in electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the disclosure.

[0392] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the system, device and unit described above can refer to the corresponding processes in the foregoing method embodiments, and will not be described here.

[0393] The above merely describes specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A cell selection method, characterized by, The method is performed by a terminal and comprises: determining, when performing cell selection, to perform cell selection according to a service duration of a cell, wherein the service duration of the cell is used to indicate a time or a time range during which the cell provides service for the terminal.

2. The method of claim 1, wherein, The determining, when performing cell selection, to perform cell selection according to the service duration of the cell comprises: determining, according to a first parameter of the cell, the service duration of the cell; performing cell selection according to the service duration of the cell. The first parameter comprises at least one of: a coverage range; an orbital height; a downtilt angle; an elevation angle; and a service time.

3. The method of claim 1, wherein, The determining, when performing cell selection, to perform cell selection according to the service duration of the cell comprises: determining a cell that provides service for the terminal for the longest time duration; determining, when performing cell selection, to select the cell that provides service for the terminal for the longest time duration.

4. The method of claim 3, wherein, The determining the cell that provides service for the terminal for the longest time duration comprises: determining, according to a first parameter of the cell, the cell that provides service for the terminal for the longest time duration. The first parameter comprises at least one of: a coverage range; an orbital height; a downtilt angle; an elevation angle; and a service time.

5. The method of claim 4, wherein, The determining, according to the first parameter of the cell, the cell that provides service for the terminal for the longest time duration comprises: determining, according to a coverage range of the cell, a cell with the largest coverage range as the cell that provides service for the terminal for the longest time duration, wherein the first parameter comprises the coverage range; or determining, according to an orbital height of the cell, a cell with the highest orbital height as the cell that provides service for the terminal for the longest time duration, wherein the first parameter comprises the orbital height; or determining, according to a downtilt angle of the cell, a cell with the largest downtilt angle as the cell that provides service for the terminal for the longest time duration, wherein the first parameter comprises the downtilt angle; or determining, according to a service time of the cell, a cell with the latest end time of the service time as the cell that provides service for the terminal for the longest time duration, wherein the first parameter comprises the service time.

6. The method of claim 2, 4 or 5, wherein, The method further comprises: receiving first indication information sent by a network device, wherein the first indication information is used to indicate a first parameter of a cell; determining the first parameter of the cell according to the first indication information.

7. The method of any one of claims 1 to 6, wherein, The determining, when performing cell selection, to perform cell selection according to the service duration of the cell comprises: calculating a second parameter value of the cell according to a cell ranking criterion, wherein the cell ranking criterion is an R criterion; ranking the cells according to the second parameter values of the cells to determine N cells with the highest ranking values, wherein N is a positive integer; determining, when performing cell selection, to perform cell selection according to the service duration of the N cells with the highest ranking values.

8. The method of claim 7, wherein, The method further comprises: receiving third indication information sent by a network device, wherein the third indication information is used to instruct the terminal to calculate a second parameter value of a cell according to a cell ranking criterion, to rank the cells according to the second parameter values of the cells to determine N cells with the highest ranking values, and to perform cell selection according to a first parameter of the N cells with the highest ranking values when performing cell selection.

9. The method of any one of claims 1 to 8, wherein, The method further comprises: sending fourth indication information to a network device, wherein the fourth indication information is used to instruct the terminal to determine, when performing cell selection, to perform cell selection according to a service duration of a cell.

10. The method of claim 9, wherein, The fourth indication information is sent to the network device, including: Determine that the first condition is met, and send the fourth indication information to the network device; Wherein, the first condition includes at least one of the following: The terminal predicts that the service demand is lower than the service demand threshold; The terminal power is lower than the power threshold; The terminal enters the power saving mode.

11. The method of any one of claims 1 to 8, wherein, The method further comprises: Receive the fifth indication information sent by the network device, wherein the fifth indication information is used to indicate that the terminal determines to perform cell selection according to the service duration of the cell when performing cell selection.

12. A cell selection method, characterized by, The method is executed by the network device, including: Send the first indication information to the terminal, wherein the first indication information is used to indicate the first parameter of the cell, the first parameter of the cell is used for the terminal to determine the service duration of the cell, the service duration of the cell is used for the terminal to determine to perform cell selection according to the service duration of the cell when performing cell selection; Or the first parameter of the cell is used for the terminal to determine the cell with the longest service duration, the cell with the longest service duration is used for the terminal to determine to select the cell with the longest service duration when performing cell selection, and the service duration of the cell is used to indicate the time or time range that the cell provides service for the terminal.

13. The method of claim 12, wherein, The first parameter includes at least one of the following: Coverage range; Orbital height; Downtilt angle; Elevation angle; Service time.

14. The method of claim 12 or 13, wherein, The method further comprises: Receive the fourth indication information sent by the terminal, wherein the fourth indication information is used to indicate that the terminal determines to perform cell selection according to the service duration of the cell when performing cell selection; Or Send the fifth indication information to the terminal, wherein the fifth indication information is used to indicate that the terminal determines to perform cell selection according to the service duration of the cell when performing cell selection.

15. The method of any one of claims 12 to 14, wherein, The method further comprises: Send the third indication information to the terminal, wherein the third indication information is used to indicate that the terminal determines to perform cell selection according to the second parameter value of the cell calculated according to the cell sorting criteria when performing cell selection, and to perform sorting according to the second parameter value of the cell, determine the cell in the first N positions of the sorting, and perform cell selection according to the service duration of the cell in the first N positions of the sorting.

16. A terminal, characterized by Including: The processing module is used for determining to perform cell selection according to the service duration of the cell when performing cell selection, wherein the service duration of the cell is used to indicate the time or time range that the cell provides service for the terminal.

17. A network device, comprising: Including: The transceiver module is used for sending the first indication information to the terminal, wherein the first indication information is used to indicate the first parameter of the cell, the first parameter of the cell is used for the terminal to determine the service duration of the cell, the service duration of the cell is used for the terminal to determine to perform cell selection according to the service duration of the cell when performing cell selection; Or the first parameter of the cell is used for the terminal to determine the cell with the longest service duration, the cell with the longest service duration is used for the terminal to determine to select the cell with the longest service duration when performing cell selection, and the service duration of the cell is used to indicate the time or time range that the cell provides service for the terminal. Including:

18. A communication device, characterized by One or more processors; ​ a memory coupled to the processor, the memory having stored thereon instructions that, when executed by the processor, cause the communication device to perform the method of any one of claims 1-11 or, when executed by the processor, cause the communication device to perform the method of any one of claims 12-15.

19. A communication system, characterized by including a terminal configured to implement the method of any one of claims 1-11 and a network device configured to implement the method of any one of claims 12-15.

20. A storage medium, the storage medium storing instructions, wherein, instructions that, when executed on a communication device, cause the communication device to perform the method of any one of claims 1-11 or, when executed on a communication device, cause the communication device to perform the method of any one of claims 12-15.

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