WO2022141639A1

WO2022141639A1 - Cell reselection method and apparatus, communication device, and storage medium

Info

Publication number: WO2022141639A1
Application number: PCT/CN2021/070169
Authority: WO
Inventors: 李小龙
Original assignee: 北京小米移动软件有限公司
Priority date: 2021-01-04
Filing date: 2021-01-04
Publication date: 2022-07-07
Also published as: CN117460008A; CN115039445A; CN115039445B

Abstract

Embodiments of the present disclosure provide a cell reselection method, applied to a network side. The method comprises: sending indication information, wherein the indication information comprises service time information and effective range information, the service time information indicates service time when a cell provides a service to a terminal, and the effective range information indicates an effective range in which the service time is effective.

Description

Method, device, communication device and storage medium for cell reselection

technical field

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

Background technique

In the fifth-generation mobile communication technology New Radio (NR, New Radio), for a terrestrial network (TN, Terrestrial Networks) system, the terminal can perform cell selection and cell reselection according to the S criterion and the R criterion. In a non-terrestrial network (NTN, Terrestrial Networks) system, when the satellite moves relative to the ground, the feeder link exchange is performed. Here, the feeder link is the link between the satellite and the terrestrial gateway.

In the related art, when the satellite exchanges the feeder link, it will lead to cell reselection of the terminal. Since the signal of the serving cell is suddenly terminated when the feeder link is switched, if the terminal only starts the measurement of the neighboring cell according to the S criterion, the terminal may not be able to perform cell reselection in time.

SUMMARY OF THE INVENTION

The embodiments of the present disclosure disclose a method, an apparatus, a communication device, and a storage medium for cell reselection.

According to a first aspect of the embodiments of the present disclosure, a method for cell reselection is provided, wherein, applied to the network side, the method includes:

send instructions;

The indication information includes: service time information and effective range information; the service time information indicates the service time during which the cell provides services to the terminal; and the effective range information indicates the effective range in which the service time is effective.

According to a second aspect of the embodiments of the present disclosure, a method for cell reselection is provided, wherein, applied to a terminal, the method includes:

Perform cell reselection according to the instruction information;

According to a third aspect of the embodiments of the present disclosure, an apparatus for cell reselection is provided, wherein, applied to the network side, the apparatus includes a sending module; wherein,

The sending module is configured to send indication information;

According to a fourth aspect of the embodiments of the present disclosure, there is provided an apparatus for cell reselection, wherein, applied to a terminal, the apparatus includes a cell reselection module; wherein,

The cell reselection module is configured to: perform cell reselection according to the indication information;

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

processor;

a memory for storing the processor-executable instructions;

Wherein, the processor is configured to: when executing the executable instructions, implement the method described in any embodiment of the present disclosure.

According to a sixth aspect of an embodiment of the present disclosure, a computer storage medium is provided, where the computer storage medium stores a computer-executable program, and when the executable program is executed by a processor, implements the method described in any embodiment of the present disclosure.

In the embodiment of the present disclosure, indication information is sent; wherein, the indication information includes: service time information and effective range information; the service time information indicates the service time for the cell to provide services to the terminal; the effective range information indicates The effective range within which the service time is effective. Here, the indication information indicates the service time information and the effective range information. In this way, the terminal can accurately determine the service time for the cell where the terminal is located to provide services to the terminal based on the service time information and the effective range information. In the technical solution of the indication information, when performing cell reselection, the terminal can perform cell reselection in time according to the service time determined by the indication information, which improves the reliability of wireless communication.

Description of drawings

FIG. 1 is a schematic structural diagram of a wireless communication system.

Fig. 2 is a schematic diagram showing a method for switching a feeder link according to an exemplary embodiment.

Fig. 3 is a schematic diagram showing a method for switching a feeder link according to an exemplary embodiment.

Fig. 4 is a schematic diagram showing a method for switching a feeder link according to an exemplary embodiment.

Fig. 5 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.

Fig. 6 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.

Fig. 7 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.

Fig. 8 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.

Fig. 9 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.

Fig. 10 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.

FIG. 11 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.

Fig. 12 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.

Fig. 13 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.

Fig. 14 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.

Fig. 15 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.

Fig. 16 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.

Fig. 17 is a schematic diagram of an apparatus for cell reselection according to an exemplary embodiment.

Fig. 18 is a schematic diagram of an apparatus for cell reselection according to an exemplary embodiment.

FIG. 19 is a schematic structural diagram of a terminal according to an exemplary embodiment.

Fig. 20 is a block diagram of a base station according to an exemplary embodiment.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments are not intended to represent all implementations consistent with embodiments of the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of embodiments of the present disclosure, as recited in the appended claims.

The terms used in the embodiments of the present disclosure are only for the purpose of describing particular embodiments, and are not intended to limit the embodiments of the present disclosure. As used in the embodiments of the present disclosure and the appended claims, the singular forms "a" and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in embodiments of the present disclosure to describe various pieces of information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the embodiments of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein can be interpreted as "at the time of" or "when" or "in response to determining."

For the purpose of brevity and ease of understanding, the terms "greater than" or "less than" are used herein when characterizing the relationship of size. However, those skilled in the art can understand that the term "greater than" also covers the meaning of "greater than or equal to", and "less than" also covers the meaning of "less than or equal to".

Please refer to FIG. 1 , which shows a schematic structural diagram of a wireless communication system provided by an embodiment of the present disclosure. As shown in FIG. 1 , the wireless communication system is a communication system based on a mobile communication technology, and the wireless communication system may include: several user equipments 110 and several base stations 120 .

The user equipment 110 may be a device that provides voice and/or data connectivity to the user. User equipment 110 may communicate with one or more core networks via a Radio Access Network (RAN), and user equipment 110 may be IoT user equipment such as sensor devices, mobile phones (or "cellular" phones) ) and a computer with IoT user equipment, for example, may be stationary, portable, pocket-sized, hand-held, computer-built or vehicle-mounted. For example, station (Station, STA), subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station), mobile station (mobile), remote station (remote station), access point, remote user equipment (remote terminal), access terminal, user terminal, user agent, user device, or user equipment. Alternatively, the user equipment 110 may also be a device of an unmanned aerial vehicle. Alternatively, the user equipment 110 may also be an in-vehicle device, for example, a trip computer with a wireless communication function, or a wireless user equipment connected to an external trip computer. Alternatively, the user equipment 110 may also be a roadside device, for example, may be a street light, a signal light, or other roadside devices with a wireless communication function.

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

The base station 120 may be an evolved base station (eNB) used in the 4G system. Alternatively, the base station 120 may also be a base station (gNB) that adopts a centralized distributed architecture in a 5G system. When the base station 120 adopts a centralized distributed architecture, it usually includes a centralized unit (central unit, CU) and at least two distributed units (distributed unit, DU). The centralized unit is provided with a protocol stack of a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control Protocol (Radio Link Control, RLC) layer, and a Media Access Control (Media Access Control, MAC) layer; distribution A physical (Physical, PHY) layer protocol stack is set in the unit, and the specific implementation manner of the base station 120 is not limited in this embodiment of the present disclosure.

A wireless connection can be established between the base station 120 and the user equipment 110 through a wireless air interface. In different embodiments, the wireless air interface is a wireless air interface based on the fourth generation mobile communication network technology (4G) standard; or, the wireless air interface is a wireless air interface based on the fifth generation mobile communication network technology (5G) standard, such as The wireless air interface is a new air interface; alternatively, the wireless air interface may also be a wireless air interface based on a 5G next-generation mobile communication network technology standard.

In some embodiments, an E2E (End to End, end-to-end) connection may also be established between the user equipments 110 . For example, V2V (vehicle to vehicle, vehicle-to-vehicle) communication, V2I (vehicle to Infrastructure, vehicle-to-roadside equipment) communication and V2P (vehicle to pedestrian, vehicle-to-person) communication in vehicle-to-everything (V2X) communication etc. scene.

Here, the above-mentioned user equipment may be regarded as the terminal equipment of the following embodiments.

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

Several base stations 120 are respectively connected to the network management device 130 . The network management device 130 may be a core network device in a wireless communication system, for example, the network management device 130 may be a mobility management entity (Mobility Management Entity) in an evolved packet core network (Evolved Packet Core, EPC). MME). Alternatively, the network management device may also be other core network devices, such as a serving gateway (Serving GateWay, SGW), a public data network gateway (Public Data Network GateWay, PGW), a policy and charging rules functional unit (Policy and Charging Rules) Function, PCRF) or home subscriber server (Home Subscriber Server, HSS), etc. The implementation form of the network management device 130 is not limited in this embodiment of the present disclosure.

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

In the 5G system, NTN was introduced.

In 5G NR, the terminal performs cell selection or reselection according to the S criterion and the R criterion.

Among them, the S criterion is:

Srxlev>0 and Squal>0;

Among them, Srxlev is the cell selection received value;

Squal selects the quality value for the cell.

The terminal needs to satisfy the S criterion for cell selection or reselection.

And, for the measurement of the same frequency of the terminal, in response to the serving cell satisfying:

Srxlev>SintraSearchP and Squal>SintraSearchQ;

Then the terminal may choose not to measure the co-frequency cell.

Wherein SIntraSearchP is used to start the RSRP signal level threshold value of the same frequency measurement;

SIntraSearchQ is used to start the RSRQ signal quality threshold for intra-frequency measurement.

In response to the above conditions not being satisfied, the terminal starts to measure the neighbor cells, and then selects the target cell according to the R criterion to complete the cell reselection.

Among them, the R criterion is:

Rs=Qmeas.s+Qhyst-Qoffset _temp ;

Rn=Qmeas.n-Qoffset-Qoffset _temp ;

Wherein, Rs is the R value of the serving cell;

Rn is the R value of the adjacent cell;

Qmeas.s is the RSRP measurement value of the serving cell;

Qmeas.n is the RSRP measurement value of the neighboring cell;

Qhyst is the cell reselection hysteresis value;

Qoffset _temp is the temporary offset value;

Qoffset is the offset value.

The specific parameters are described in Table 1:

Table I

Referring to Fig. 2, at time T1, the satellite is connected to the ground station GW1.

Referring to Figure 3, at time T1.5, the satellite starts to exchange feeder links.

Here, the feeder link switching may be the switching of the satellite from being connected to the ground station GW1 to being connected to the ground station GW2.

In one embodiment, the satellite may remain connected to the ground station GW1 and the ground station GW2 at the same time.

In one embodiment, for the terminal in the RRC idle state or inactive state, start to perform cell reselection, from the cell of gNB1 to the cell of gNB2, where the cell of gNB1 is the cell corresponding to the connection between the satellite and the ground station GW1 Cell, the cell of gNB2 is the cell corresponding to when the satellite is connected to the ground station GW2.

Referring to FIG. 4 , at time T2, the satellite completes the feeder link exchange, and the terminal completes cell reselection, from the cell of gNB1 to the cell of gNB2.

Here, when the satellite exchanges feeder links, it will lead to cell reselection of the terminal. That is, at time T1.5, the terminal in the RRC idle state or the RRC inactive state needs to start cell reselection, from the cell of gNB1 to the cell of gNB2. Since the cell of gNB1 is suddenly unavailable when the feeder link is switched, if the terminal only starts the measurement of the neighboring cell according to the S criterion, the terminal may not be able to perform cell reselection in time.

In order to facilitate the understanding of those skilled in the art, the embodiments of the present disclosure enumerate multiple implementation manners to clearly illustrate the technical solutions of the embodiments of the present disclosure. Of course, those skilled in the art can understand that the multiple embodiments provided by the embodiments of the present disclosure may be executed independently, or may be executed together with the methods of other embodiments in the embodiments of the present disclosure, or may be executed alone or in combination and then executed together with some methods in other related technologies; this is not limited by the embodiments of the present disclosure.

As shown in FIG. 5 , a method for cell reselection is provided in this embodiment, wherein, applied to the network side, the method includes:

Step 51, sending instruction information;

The indication information includes: service time information and effective range information; service time information, indicating the service time during which the cell provides services to the terminal; and effective range information, indicating the effective range in which the service time is effective.

Here, the network side may send the indication information to the terminal. Here, the terminal may be, but is not limited to, a mobile phone, a wearable device, a vehicle-mounted terminal, a roadside unit (RSU, Road Side Unit), a smart home terminal, an industrial sensing device, and other terminals. In one embodiment, the cell may be a cell of a satellite in the NTN. Here, the satellites may be flying base stations. The base station may be an access device for the terminal to access the NTN. The base stations can be of various types. For example, a base station of a third generation mobile communication (3G) network, a base station of a fourth generation mobile communication (4G) network, a base station of a fifth generation mobile communication (5G) network, or other evolved base stations.

In one embodiment, an NTN cell may be a cell with satellite coverage of the ground. Here, one satellite may correspond to at least one cell covering the ground.

In one illustrative scenario embodiment, feeder link exchanges occur while the satellite is in operation. Here, in response to the feeder link switching, the terminal in the non-connected state in the serving cell needs to perform cell reselection. Of course, this scenario embodiment is just an example, not a limitation on the application scenario of the present disclosure; that is, there may be various scenarios for triggering cell reselection, which are not limited to feeder link switching.

In one embodiment, the service time information may be the time information when the service is stopped to be provided to the terminal; the effective range information may be the location area information. In one embodiment, the network side sends indication information to the terminal, wherein the service time information is the time information when the service is stopped to be provided to the terminal; the effective range information is the location area information. The terminal acquires the location information of the terminal. In response to the terminal being located in the geographic area indicated by the location area information, the time information is determined to take effect. In response to the time information taking effect, the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection. In one embodiment, the location area information may be a location area identifier; wherein, the location area identifier indicates a geographic area. For example, the location area identifier is a, wherein the location area identifier a indicates the geographic area A.

In another embodiment, the service time information may be the time information when the service is stopped to be provided to the terminal; the effective range information may be cell information. In an embodiment, the network side sends indication information to the terminal, wherein the service time information is the time information when the service is stopped to be provided to the terminal; the effective range information is cell information. In response to the serving cell in which the terminal is located is the cell indicated by the cell information, it is determined that the time information takes effect. In response to the time information taking effect, the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection. In an embodiment, the cell information may be a cell identifier; wherein, the cell identifier indicates a cell. For example, the cell identifier is b, where the cell identifier b indicates cell B. Here, the cell identity may be a physical cell identity (PCI, physical cell identity) and/or a global cell identity (GCI, global cell identity).

In yet another embodiment, the service time information may be the time information when the service is stopped to be provided to the terminal; the effective range information may be time period information. In an embodiment, the network side sends indication information to the terminal, wherein the service time information is the time information when the service is stopped to be provided to the terminal; and the effective range information is time period information. The terminal gets the local time. In response to the local time being within the time period indicated by the time period information, it is determined that the time instant information is valid. In response to the time information taking effect, the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection. Here, the time period information may be the UTC time period; the local time may be the local UTC time. In one embodiment, the time period information may be a time period identifier; wherein, the time period identifier indicates a time period. For example, the time period identifier t indicates the time period T.

In yet another embodiment, the service time information may be system frame information when the service is stopped to be provided to the terminal; and the effective range information may be location area information. In one embodiment, the network side sends indication information to the terminal, wherein the service time information is system frame information when the service is stopped to be provided to the terminal; and the effective range information is location area information. The terminal acquires the location information of the terminal. In response to the terminal being located in the geographic area indicated by the location area information, it is determined that the system frame information is valid. In response to the system frame information taking effect, the terminal performs neighbor cell measurement before the system frame indicated by the system frame information to complete cell reselection.

In yet another embodiment, the service time information may be system frame information that stops providing services to the terminal; the effective range information may be cell information. In an embodiment, the network side sends indication information to the terminal, wherein the service time information is system frame information for stopping providing services to the terminal; and the effective range information is cell information. In response to the serving cell where the terminal is located is the cell indicated by the cell information, it is determined that the system frame information is valid. In response to the system frame information taking effect, the terminal performs neighbor cell measurement before the system frame indicated by the system frame information to complete cell reselection.

In yet another embodiment, the service time information may be system frame information when the service is stopped to be provided to the terminal; the effective range information may be time period information. Here, the system frame indicated by the system frame information corresponds to a moment. In one embodiment, the network side sends indication information to the terminal, wherein the service time information is system frame information for stopping providing services to the terminal; and the effective range information is time period information. The terminal gets the local time. In response to the local time being within the time period indicated by the time period information, it is determined that the system frame information is valid. In response to the system frame information taking effect, the terminal performs neighbor cell measurement before the system frame indicated by the system frame information to complete cell reselection.

In yet another embodiment, the service time information may be the duration information that the network side can provide services to the terminal; the effective range information may be location area information. Here, the system frame indicated by the system frame information corresponds to a moment. In one embodiment, the network side sends indication information to the terminal, wherein the service time information is the duration information that the network side can provide the terminal with; the effective range information is location area information. The terminal acquires the location information of the terminal. In response to the terminal being located in the geographic area indicated by the location area information, it is determined that the time period information takes effect. In response to the validity of the duration information, the terminal performs neighbor cell measurement before the duration indicated by the duration information expires to complete cell reselection.

In yet another embodiment, the service time information may be the duration information that the network side can provide services to the terminal; the effective range information may be cell information. Here, the system frame indicated by the system frame information corresponds to a moment. In one embodiment, the network side sends indication information to the terminal, wherein the service time information is the duration information that the network side can provide the terminal with; the effective range information is cell information. In response to the serving cell where the terminal is located is the cell indicated by the cell information, it is determined that the time period information takes effect. In response to the time period information taking effect, the terminal performs neighbor cell measurement before the time period indicated by the time period information expires to complete cell reselection.

In yet another embodiment, the service time information may be duration information that the network side can provide services to the terminal; the effective range information may be time period information. In one embodiment, the network side sends indication information to the terminal, wherein the service time information is the duration information that the network side can provide services to the terminal; the effective range information is time period information. The terminal gets the local time. In response to the local time being within the time period indicated by the time period information, it is determined that the duration information is valid. In response to the validity of the duration information, the terminal performs neighbor cell measurement before the duration indicated by the duration information expires to complete cell reselection.

In yet another embodiment, the service time information may be system frame information corresponding to when the network side can provide services to the terminal; the effective range information may be location area information. Here, the system frame information includes the system frame number of the starting system frame and the offset relative to the system frame number of the starting system frame. The system frame information may indicate a plurality of system frames. Multiple system frames may correspond to a period of time. In one embodiment, the network side sends indication information to the terminal, wherein the service time information is system frame information that the network side can provide services for the terminal; the effective range information is location area information. The terminal acquires the location information of the terminal. In response to the terminal being located in the geographic area indicated by the location area information, it is determined that the system frame information is valid. In response to the system frame information taking effect, the terminal performs neighbor cell measurement before the time durations corresponding to the multiple system frames indicated by the system frame information expire in time to complete cell reselection.

In yet another embodiment, the service time information may be system frame information when the network side can provide services to the terminal; the effective range information may be cell information. Here, the system frame information includes the system frame number of the starting system frame and the offset relative to the system frame number of the starting system frame. The system frame information may indicate a plurality of system frames. Multiple system frames may correspond to a period of time. In an embodiment, the network side sends indication information to the terminal, wherein the service time information is system frame information when the network side can provide services to the terminal; the effective range information is cell information. In response to the serving cell where the terminal is located is the cell indicated by the cell information, it is determined that the system frame information is valid. In response to the system frame information taking effect, the terminal performs neighbor cell measurement before the time duration corresponding to the multiple system frames indicated by the system frame information ends to complete cell reselection.

In yet another embodiment, the service time information may be system frame information when the network side can provide services to the terminal; the effective range information may be time period information. Here, the system frame information includes the system frame number of the starting system frame and the offset relative to the system frame number of the starting system frame. The system frame information may indicate a plurality of system frames. Multiple system frames may correspond to a period of time. In one embodiment, the network side sends indication information to the terminal, wherein the service time information is system frame information when the network side can provide services to the terminal; the effective range information is time period information. The terminal gets the local time. In response to the local time being within the time period indicated by the time period information, it is determined that the system frame information is valid. In response to the system frame information taking effect, the terminal performs neighbor cell measurement before the time duration corresponding to the multiple system frames indicated by the system frame information ends to complete cell reselection.

In one embodiment, the service time information is determined according to the moment when the feeder link exchange is initiated. For example, the time when feeder link switching is started is time A, and the time before time A is determined when the network side indicated by the service time information can provide services to the terminal.

In one embodiment, the service time information is determined according to the time difference between the current time and the time when the feeder link exchange is initiated.

In one embodiment, the service time is a duration, and in response to the time difference being greater than the first duration threshold, the duration corresponding to the service time is greater than the second duration threshold; in response to the time difference being less than the first duration threshold, the duration corresponding to the service time is less than The second duration threshold. In this way, the service time can be adapted to the time difference between the current moment and the moment when the feeder link exchange was initiated.

In one embodiment, in response to the service time taking effect, a timer for triggering cell reselection is started; wherein, the timing time of the timer is less than or equal to the duration determined according to the service time. Here, in response to the timer expiring, cell reselection is triggered.

In this way, the terminal can complete the operation of cell reselection before the NTN cell cannot provide services to the terminal, and perform cell reselection in time.

In one embodiment, the NTN serving cell can provide services to the terminal within x seconds before it stops providing services to the terminal, that is, the service time is x seconds; the time indicated by the time flag of the effective range information is also the UCI time. Here, the time identifier is UCI1, and UCI1 may indicate that the target time at which the service time x seconds takes effect is UCI1. When the local UCI time obtained by the terminal is UCI1, it is determined that the service time x seconds takes effect. In response to the service time taking effect, the terminal performs measurements on neighboring cells before the end of the service time x seconds to complete cell reselection.

In one embodiment, in response to determining that the service time is valid according to the validity range information, the terminal can perform cell reselection based on the valid service time; in response to that the service time determined according to the valid range is not valid, the service time is not valid. service time, the terminal cannot perform cell reselection based on the ineffective service time.

In one embodiment, in response to the terminal being unable to perform cell reselection based on the invalid service time, the terminal performs cell reselection based on the R criterion and the S criterion.

Here, since the running track of the satellite, the moving speed of the satellite and the ground station are fixed, the time when the corresponding cell cannot provide service to the terminal when the network exchanges the feeder link is determined. Therefore, the service time information and Effective range information.

In some embodiments, the indication information can be sent in one of the following ways:

Use system messages to send indication information;

Use RRC message to send indication information;

In the random access process of the terminal, the random access message is used to send the indication information.

In this way, the message compatibility of system messages, RRC messages or random access messages can be improved.

In one embodiment, the indication information may be sent at one of the following occasions:

In response to the terminal transitioning from the disconnected state to the connected state, sending indication information;

In response to the terminal initially accessing the cell, sending indication information;

In response to receiving a request message for obtaining indication information sent by the terminal, the indication information is sent.

In the embodiment of the present disclosure, the indication information is sent; wherein, the indication information includes: service time information and effective range information; service time information, indicating the service time during which the cell provides services to the terminal; effective range information, indicating the effective range of the service time effective. . Here, the indication information indicates the service time information and the effective range information. In this way, the terminal can accurately determine the service time for the cell where the terminal is located to provide services to the terminal based on the service time information and the effective range information. Compared with the solution in which the indication information cannot be obtained, in the When performing cell reselection, the terminal can perform cell reselection in time according to the service time determined by the indication information, which improves the reliability of wireless communication.

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

In one embodiment, the service time includes at least one of the following:

The time when the cell stops providing services to the terminal;

The time during which the cell can provide services to the terminal.

Here, time can be a moment or a duration.

For example, the time when the cell stops providing services to the terminal may be time A when the cell stops providing services for the terminal. Here, before time A, the cell can provide services to the terminal.

For another example, the time that the cell can provide the service to the terminal may be the time period x that the cell can provide the service to the cell. Here, before the expiration of the duration x, the cell can provide services to the terminal.

In one embodiment, the service time includes at least one of the following:

The moment when the cell stops providing services to the terminal;

The length of time that the cell can provide services to the terminal.

In one embodiment, the network side determines the time when the cell stops providing services to the terminal according to the time when the feeder link exchange is started. For example, if feeder link switching is started at time A, it can be determined that the time when the service is stopped to the terminal is time A.

In one embodiment, according to the time difference between the current moment and the moment when the feeder link exchange is started, the duration that the cell can provide services to the terminal is determined. For example, if the time difference value is a, it can be determined that the duration that the cell can provide services to the terminal is a.

In one embodiment, according to the number of feeder link exchanges, the moment when the cell stops providing service to the terminal or the number of time periods during which the cell can provide service to the terminal is determined. For example, if N feeder link exchanges need to be performed, there may be N corresponding times when the cell stops providing services to the terminal, where N is a positive integer greater than 1. For another example, if N feeder link exchanges need to be performed, there may be N corresponding durations that the cell can provide services to the terminal.

In one embodiment, the indication information includes N pieces of service time information; wherein, each service time information is associated with one piece of the effective range information.

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

In one embodiment, the service time information includes at least one of the following:

The first time information includes: system frame information of the corresponding system frame when the cell stops providing services to the terminal;

The second time information includes: UTC time information when the cell stops providing services to the terminal;

The third time information includes: duration information that the cell can provide services to the terminal.

Here, the system frame information may be information associated with the system frame number of the system frame.

In one embodiment, the system frame information includes one of the following:

The system frame number of the system frame;

The starting system frame number and the offset relative to the starting system frame number.

In one embodiment, the system frame number of the system frame is the system frame number when the service is stopped for the terminal. The terminal can determine the time when the cell stops providing services to the terminal according to the system frame number. For example, if the time corresponding to the system frame number is time A, then at time A, the cell stops providing services to the terminal.

In one embodiment, the system frame number corresponding to the time period in which the cell can provide services to the terminal may be determined according to the starting system frame number and the offset relative to the starting system frame number. In this way, the time period during which the cell can provide services to the terminal can be determined based on the determined system frame number.

In one embodiment, the system frame number at which the cell stops providing services to the terminal is determined according to the start time point of the feeder link exchange.

In one embodiment, the starting system frame number and the offset relative to the starting system frame number are determined according to the start time point of the feeder link exchange. The starting system frame corresponding to the starting system frame number and the system frame determined according to the offset are the system frames sent before the starting time point.

In one embodiment, the time information includes at least one of the following:

UTC duration information;

UTC time information.

In one embodiment, the UTC time information is the UTC time information when the service is stopped for the terminal.

In one embodiment, the UTC duration information is time difference information between the current UTC time and the start UTC time exchanged by the feeder link.

In one embodiment, the system frame number corresponding to the time period in which the service can be provided may be determined according to the starting system frame number and the offset relative to the starting system frame number.

In one embodiment, the duration information is determined according to the start time point of the feeder link exchange.

For example, if the feeder link switching start time point is A, the duration indicated by the duration information may be x seconds before A, and the service time information carries information of x seconds. Here, the duration information may be UTC duration information.

In one embodiment, the effective scope information includes at least one of the following:

location area identification information, indicating a geographic area; wherein, in response to the terminal being in the geographic area indicated by the location area identification information, the service time takes effect;

Time identification information, indicating a time period and/or time; wherein, in response to the local time obtained by the terminal being within the time period indicated by the time identification information and/or the local time obtained by the terminal being the time indicated by the time identification information, the service time take effect;

The cell identification information indicates the serving cell; wherein, in response to the terminal being in the serving cell indicated by the cell identification information, the service time takes effect.

In one embodiment, the service time is valid in response to the terminal being in the geographic area indicated by the location area identification information. The terminal may perform cell reselection based on service time.

In one embodiment, in response to the terminal being located in the geographic area indicated by the location area identification information, it is determined that the time information corresponding to the service time takes effect. In response to the time information taking effect, the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection.

In one embodiment, the geographic area may be an area composed of latitude and longitude on the earth.

In one embodiment, the geographic area may be an area indicated by a reference point and a reference distance. For example, a geographic area can be a circular area with point A as the center and R as the radius.

In one embodiment, the area may be the area covered by satellite signals when the satellite performs feeder link switching.

In one embodiment, in response to the local time obtained by the terminal being within the time period indicated by the time identification information or the time indicated by the time identification information, it is determined that the service time takes effect. The terminal may perform cell reselection based on service time.

In one embodiment, the terminal obtains the local time. In response to the local time being within the time period indicated by the time identification information, it is determined that the time information corresponding to the service time is valid. In response to the time information taking effect, the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection. Here, the time period information may be the UTC time period; the local time may be the local UTC time.

In one embodiment, the time period indicated by the time identification information may include a start time and an end time.

In one embodiment, the time period indicated by the time identification information may be represented by UTC time.

In one embodiment, in response to the terminal being in the serving cell indicated by the cell identification information, it is determined that the service time takes effect. The terminal may perform cell reselection based on service time.

In one embodiment, in response to the serving cell in which the terminal is located is a cell indicated by the cell identification information, determining that the time information takes effect. In response to the time information taking effect, the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection.

In one embodiment, the cell identity may be PCI or GCI.

As shown in FIG. 6 , a method for cell reselection is provided in this embodiment, wherein, applied to the network side, the method includes:

Step 61: Determine the geographic area according to the geographic area covered by the satellite signal when the feeder link is exchanged.

In one embodiment, the geographic area covered by the satellite signal when the feeder link is exchanged may be the geographic area covered by the satellite signal within a predetermined time range before the feeder link exchange is performed. For example, the geographic area covered by the satellite signal in the 3 seconds before the feeder link exchange is performed.

Here, the determined geographic area is the geographic area indicated in the effective range information.

In one embodiment, the ground area is pre-divided into a plurality of geographic areas. For example, the ground area is pre-divided into area A, area B, and area C.

In one embodiment, when the feeder link is exchanged, the geographic areas covered by the satellite signals are area B and area C, then the geographic areas may be determined as area B and area C.

As shown in FIG. 7 , this embodiment provides a method for cell reselection, wherein, applied to the network side, the method includes:

Step 71: Determine the time period indicated by the time identification information according to the time period at which the feeder link is exchanged; or, determine the time indicated by the time identification information according to the time at which the feeder link is exchanged.

In one embodiment, the period during which the feeder link is switched is the A period, and then the B period before the A period may be determined as the time period indicated by the time identification information. Here, the terminal needs to complete the cell reselection before the end of the B period.

In one embodiment, the time period in which the feeder link is exchanged is time A, then it can be determined that time A is the time indicated by the time identification information. Here, the terminal needs to complete the cell reselection before time A.

In one embodiment, the number of time periods and/or moments indicated by the time identification information may be determined according to the number of feeder link exchanges.

For example, if the number of feeder link exchanges is N, the number of time periods and/or moments is N. N is a positive integer greater than 1.

In one embodiment, different feeder link exchanges correspond to different time periods and/or times.

As shown in FIG. 8 , this embodiment provides a method for cell reselection, wherein, applied to the network side, the method includes:

Step 81: Determine the identity of the serving cell according to the cell identity of the cell covered by the signal when the feeder link is exchanged.

In one embodiment, the cell identifier of the cell covered by the satellite signal when the feeder link is exchanged may be the cell identifier of the cell covered by the satellite signal within a predetermined time range before the feeder link exchange is performed. For example, the cell identity of the cell covered by the satellite signal within 3 seconds before the feeder link exchange is performed.

In one embodiment, the cells covered by the satellite when the feeder links are exchanged may be multiple cells. For example, the plurality of cells may be A cell, B cell and C cell.

In an embodiment, the cells covered by the satellites during the feeder link exchange are the B cell and the D cell, then the identifiers of the serving cells can be determined to be the identifier of the B cell and the identifier of the D cell.

As shown in FIG. 9 , this embodiment provides a method for cell reselection, wherein, applied to the network side, the method includes:

Step 91: Determine the service time indicated by the service time information according to the time difference between the current time and the time when the feeder link exchange is started.

In one embodiment, in response to the time difference being greater than the first duration threshold, the duration corresponding to the service time is greater than the second duration threshold; in response to the time difference being less than the first duration threshold, the duration corresponding to the service time is less than the second duration threshold. In this way, the service time can be adapted to the time difference between the current moment and the moment when the feeder link exchange was initiated.

In one embodiment, the current time is time A; the time when feeder link switching is started is time B, and the service time may be the duration from time A to time B.

In one embodiment, multiple feeder link exchanges are included during the operational cycle of the satellite.

In one embodiment, different feeder link exchanges determine different service times.

For example, the service time corresponding to the first feeder link exchange is the first service time; the service time corresponding to the second feeder link exchange is the second service time.

In one embodiment, the indication information includes a plurality of service time information; wherein, each service time information is associated with one valid range information.

In one implementation, the amount of service time information is determined based on the number of feeder link exchanges.

In one embodiment, in response to the number of feeder link exchanges being greater than the number threshold, the quantity of service time information is greater than the quantity threshold; in response to the number of feeder link exchanges being less than the number threshold, the quantity of service time information is less than the quantity threshold.

In one embodiment, each feeder link exchange corresponds to a piece of service time information and validity range information.

As shown in FIG. 10 , this embodiment provides a method for cell reselection, wherein, applied to the network side, the method includes:

Step 101: Send a system message carrying indication information; or, send an RRC message carrying indication information; or, send a random access message carrying indication information.

In one embodiment, the network side sends a system message carrying indication information to the terminal in the disconnected state.

In one embodiment, in response to the terminal establishing an RRC connection with the network side, the network side sends an RRC message carrying indication information.

In one embodiment, during the random access process, the network side sends a random access message carrying indication information.

In this way, the indication information is carried in the system message, the RRC message or the random access message, which can improve the compatibility of the message.

As shown in FIG. 11 , this embodiment provides a method for cell reselection, wherein, applied to the network side, the method includes:

Step 111 , in response to sending the indication information through the system message, update the indication information when the feeder link is exchanged.

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

In one embodiment, the indication information is updated each time a feeder link exchange occurs.

In one embodiment, the updating system message may be updating the service time carried in the system message.

As shown in FIG. 12 , this embodiment provides a method for cell reselection, wherein, applied to the network side, the method includes:

Step 121: In response to the system message carrying the instruction information corresponding to the single switch of the feeder link, update the instruction information each time the feeder link is exchanged; or, in response to the system message carrying the instruction information corresponding to the multiple switching of the feeder link, The indication information is updated when feeder link exchanges other than multiple feeder link exchanges are performed.

In one embodiment, the satellite requires multiple feeder link exchanges during its operating cycle.

In one embodiment, a single exchange may correspond to each of a plurality of feeder link exchanges during the satellite's operating cycle.

In one embodiment, the multiple exchanges may correspond to at least two feeder link exchanges among the N feeder link exchanges in the satellite's operating cycle.

In one embodiment, the update indication information may be: update the service time information in the system message and/or update the validity range information in the system message.

As shown in FIG. 13 , this embodiment provides a method for cell reselection, which is applied to a terminal, and the method includes:

Step 131: Perform cell reselection according to the indication information;

Here, the network side may send the indication information to the terminal.

Here, the terminal may be, but is not limited to, a mobile phone, a wearable device, a vehicle-mounted terminal, a roadside unit (RSU, Road Side Unit), a smart home terminal, an industrial sensing device, and other terminals.

In one embodiment, the cell may be a cell of a satellite in the NTN. Here, the satellites may be flying base stations. The base station may be an access device for the terminal to access the NTN. The base stations can be of various types. For example, a base station of a third generation mobile communication (3G) network, a base station of a fourth generation mobile communication (4G) network, a base station of a fifth generation mobile communication (5G) network, or other evolved base stations.

In one illustrative scenario embodiment, feeder link exchanges occur while the satellite is in operation. Here, in response to the feeder link switching, the terminal in the non-connected state in the serving cell needs to perform cell reselection. Of course, this scenario embodiment is only an example, and is not intended to limit the application scenario of the present disclosure; that is, there may be various scenarios for triggering cell reselection, and it is not limited to feeder link switching.

In another embodiment, the service time information may be the time information when the service is stopped to be provided to the terminal; the effective range information may be the location area information. In one embodiment, the terminal receives the indication information sent by the network side, wherein the service time information is the time information when the service is stopped to the terminal; the effective range information is the location area information. The terminal acquires the location information of the terminal. In response to the terminal being located in the geographic area indicated by the location area information, the time information is determined to take effect. In response to the time information taking effect, the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection. In one embodiment, the location area information may be a location area identifier; wherein, the location area identifier indicates a geographic area. For example, the location area identifier is a, wherein the location area identifier a indicates the geographic area A.

In yet another embodiment, the service time information may be the time information when the service is stopped to be provided to the terminal; the effective range information may be cell information. In an embodiment, the terminal receives the indication information sent by the network side, wherein the service time information is the time information when the service is stopped to the terminal; the effective range information is cell information. In response to the serving cell in which the terminal is located is the cell indicated by the cell information, it is determined that the time information takes effect. In response to the time information taking effect, the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection. In an embodiment, the cell information may be a cell identifier; wherein, the cell identifier indicates a cell. For example, the cell identifier is b, where the cell identifier b indicates cell B. Here, the cell identity may be PCI and/or GCI.

In yet another embodiment, the service time information may be the time information when the service is stopped to be provided to the terminal; the effective range information may be time period information. In an embodiment, the terminal receives the indication information sent by the network side, wherein the service time information is the time information when the service is stopped to be provided to the terminal; the effective range information is the time period information. The terminal gets the local time. In response to the local time being within the time period indicated by the time period information, it is determined that the time instant information is valid. In response to the time information taking effect, the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection. Here, the time period information may be the UTC time period; the local time may be the local UTC time. In one embodiment, the time period information may be a time period identifier; wherein, the time period identifier indicates a time period. For example, the time period identifier t indicates the time period T.

In yet another embodiment, the service time information may be system frame information when the service is stopped to be provided to the terminal; and the effective range information may be location area information. In one embodiment, the terminal receives the indication information sent by the network side, wherein the service time information is the system frame information when the service is stopped to the terminal; the effective range information is the location area information. The terminal acquires the location information of the terminal. In response to the terminal being located in the geographic area indicated by the location area information, it is determined that the system frame information is valid. In response to the system frame information taking effect, the terminal performs neighbor cell measurement before the system frame indicated by the system frame information to complete cell reselection.

In yet another embodiment, the service time information may be system frame information that stops providing services to the terminal; the effective range information may be cell information. In one embodiment, the terminal receives the indication information sent by the network side, wherein the service time information is system frame information that stops providing services to the terminal; and the effective range information is cell information. In response to the serving cell where the terminal is located is the cell indicated by the cell information, it is determined that the system frame information is valid. In response to the system frame information taking effect, the terminal performs neighbor cell measurement before the system frame indicated by the system frame information to complete cell reselection.

In yet another embodiment, the service time information may be system frame information when the service is stopped to be provided to the terminal; the effective range information may be time period information. Here, the system frame indicated by the system frame information corresponds to a moment. In one embodiment, the terminal receives the indication information sent by the network side, wherein the service time information is system frame information for stopping providing services to the terminal; and the effective range information is time period information. The terminal gets the local time. In response to the local time being within the time period indicated by the time period information, it is determined that the system frame information is valid. In response to the system frame information taking effect, the terminal performs neighbor cell measurement before the system frame indicated by the system frame information to complete cell reselection.

In yet another embodiment, the service time information may be the duration information that the network side can provide services to the terminal; the effective range information may be location area information. Here, the system frame indicated by the system frame information corresponds to a moment. In one embodiment, the terminal receives the indication information sent by the network side, wherein the service time information is the duration information that the network side can provide the terminal with; the effective range information is the location area information. The terminal acquires the location information of the terminal. In response to the terminal being located in the geographic area indicated by the location area information, it is determined that the time period information takes effect. In response to the validity of the duration information, the terminal performs neighbor cell measurement before the duration indicated by the duration information expires to complete cell reselection.

In yet another embodiment, the service time information may be the duration information that the network side can provide services to the terminal; the effective range information may be cell information. Here, the system frame indicated by the system frame information corresponds to a moment. In an embodiment, the terminal receives the indication information sent by the network side, wherein the service time information is the time length information that the network side can provide the terminal with; the effective range information is cell information. In response to the serving cell where the terminal is located is the cell indicated by the cell information, it is determined that the time period information takes effect. In response to the time period information taking effect, the terminal performs neighbor cell measurement before the time period indicated by the time period information expires to complete cell reselection.

In yet another embodiment, the service time information may be duration information that the network side can provide services to the terminal; the effective range information may be time period information. In one embodiment, the terminal receives the indication information sent by the network side, wherein the service time information is the duration information that the network side can provide the terminal with; the effective range information is time period information. The terminal gets the local time. In response to the local time being within the time period indicated by the time period information, it is determined that the duration information is valid. In response to the validity of the duration information, the terminal performs neighbor cell measurement before the duration indicated by the duration information expires to complete cell reselection.

In yet another embodiment, the service time information may be system frame information corresponding to when the network side can provide services to the terminal; the effective range information may be location area information. Here, the system frame information includes the system frame number of the starting system frame and the offset relative to the system frame number of the starting system frame. The system frame information may indicate a plurality of system frames. Multiple system frames may correspond to a period of time. In one embodiment, the terminal receives the indication information sent by the network side, wherein the service time information is system frame information that the network side can provide services to the terminal; the effective range information is location area information. The terminal acquires the location information of the terminal. In response to the terminal being located in the geographic area indicated by the location area information, it is determined that the system frame information is valid. In response to the system frame information taking effect, the terminal performs neighbor cell measurements before the time periods corresponding to multiple system frames indicated by the system frame information expire in time to complete cell reselection.

In yet another embodiment, the service time information may be system frame information when the network side can provide services to the terminal; the effective range information may be cell information. Here, the system frame information includes the system frame number of the starting system frame and the offset relative to the system frame number of the starting system frame. The system frame information may indicate a plurality of system frames. Multiple system frames may correspond to a period of time. In one embodiment, the terminal receives the indication information sent by the network side, wherein the service time information is system frame information when the network side can provide services to the terminal; the effective range information is cell information. In response to the serving cell where the terminal is located is the cell indicated by the cell information, it is determined that the system frame information is valid. In response to the system frame information taking effect, the terminal performs neighbor cell measurement before the time duration corresponding to the multiple system frames indicated by the system frame information ends to complete cell reselection.

In yet another embodiment, the service time information may be system frame information when the network side can provide services to the terminal; the effective range information may be time period information. Here, the system frame information includes the system frame number of the starting system frame and the offset relative to the system frame number of the starting system frame. The system frame information may indicate a plurality of system frames. Multiple system frames may correspond to a period of time. In one embodiment, the terminal receives the indication information sent by the network side, wherein the service time information is system frame information when the network side can provide services to the terminal; the effective range information is time period information. The terminal gets the local time. In response to the local time being within the time period indicated by the time period information, it is determined that the system frame information is valid. In response to the system frame information taking effect, the terminal performs neighbor cell measurement before the time duration corresponding to the multiple system frames indicated by the system frame information ends to complete cell reselection.

In one embodiment, the network side determines the service time information according to the moment when the feeder link switching is started. For example, the time when feeder link switching is started is time A, and the time before time A is determined when the network side indicated by the service time information can provide services to the terminal.

In one embodiment, the network side determines the service time information according to the time difference between the current moment and the moment when the feeder link switching is started.

In one embodiment, the service time is the duration, and in response to the time difference being greater than the first duration threshold, the duration corresponding to the service time is greater than the second duration threshold; in response to the time difference being less than the first duration threshold, the duration corresponding to the service time is less than The second duration threshold. In this way, the service time can be adapted to the time difference between the current moment and the moment when the feeder link exchange was initiated.

In one embodiment, in response to the service time taking effect, the terminal starts a timer for triggering cell reselection; wherein, the timing time of the timer is less than or equal to the duration determined according to the service time. Here, in response to the timer expiring, cell reselection is triggered.

In one embodiment, in response to determining that the service time is valid according to the validity range information, the terminal can perform cell reselection based on the valid service time; in response to the service time determined according to the valid range being invalid, the service time is not valid. service time, the terminal cannot perform cell reselection based on the ineffective service time.

Here, since the running track of the satellite, the moving speed of the satellite and the ground station are fixed, the time when the corresponding cell cannot provide service to the terminal when the network exchanges the feeder link is determined. Therefore, the network side can pre-determine the service time. Information and Effective Scope Information.

In some embodiments, the indication information can be received in one of the following ways:

Use system messages to receive indication information;

Use RRC message to receive indication information;

In the random access process of the terminal, the random access message is used to receive the indication information.

In one embodiment, the indication information may be received at one of the following occasions:

In response to the terminal transitioning from the disconnected state to the connected state, receiving indication information;

In response to the terminal initially accessing the cell, receiving indication information;

In response to receiving the request message sent by the terminal for obtaining the indication information, the indication information sent by the network side for the request information sent by the terminal is received.

In one embodiment, the indication information includes one of the following:

Indication information sent by the network side;

Indication information preconfigured in the terminal.

In one embodiment, the indication information is stored in a storage area of the terminal.

In one embodiment, the indication information is stored in a Universal Subscriber Identity Module (USIM, Universal Subscriber Identity Module) of the terminal.

In one embodiment, the indication information is stored in an embedded global subscriber identity card (eSIM, embedded-SIM).

In one embodiment, the service time includes at least one of the following:

The time when the cell stops providing services to the terminal;

The time during which the cell can provide services to the terminal.

Here, time can be a moment or a duration.

For another example, the time that the cell can provide the service to the terminal may be the time period x that the cell can provide the service to the cell. Here, the cell can provide services to the terminal before the time duration x expires.

In one embodiment, the service time includes at least one of the following:

The moment when the cell stops providing services to the terminal;

The length of time that the cell can provide services to the terminal.

In one embodiment, the network side determines the duration that the cell can provide services to the terminal according to the time difference between the current moment and the moment when the feeder link exchange is started. For example, if the time difference value is a, it can be determined that the duration that the cell can provide services to the terminal is a.

In one embodiment, the network side determines, according to the number of feeder link exchanges, the moment when the cell stops providing services to the terminal or the number of time periods during which the cell can provide services to the terminal. For example, if N times of feeder link switching are required, there may be N corresponding times when the cell stops providing services to the terminal, where N is a positive integer greater than 1. For another example, if N feeder link exchanges need to be performed, there may be N corresponding durations that the cell can provide services to the terminal.

In one embodiment, the system frame information includes one of the following:

The system frame number of the system frame;

In one embodiment, the time information includes at least one of the following:

UTC duration information;

UTC time information.

In one embodiment, it is determined that the service time takes effect in response to the local time acquired by the terminal being within the time period indicated by the time identification information or at the time indicated by the time identification information. The terminal may perform cell reselection based on service time.

In one embodiment, the cell identity may be PCI or GCI.

As shown in FIG. 14 , this embodiment provides a method for cell reselection, which is applied to a terminal, and the method includes:

Step 141, in response to determining that the service time is valid according to the indication information, perform cell reselection before the time indicated by the service time information to stop providing services to the terminal; or, in response to determining that the service time is invalid according to the indication information, based on the R criterion and the S criterion. Perform cell reselection.

In one embodiment, determining that the service time is valid in response to the terminal being in the geographic area indicated by the location area identification information.

For example, the geographic area indicated by the location area identification information is in the circular area A with the reference point o as the center. When the terminal is located in the circular area A, it is determined that the service time takes effect.

In one embodiment, it is determined that the service time is valid in response to the local time obtained by the terminal being within the time period indicated by the time identification information.

For example, the time period indicated by the time identification information is the A period, the terminal obtains the local time, and when the obtained local time is within the A period, it is determined that the service time takes effect.

In one embodiment, in response to the current serving cell acquired by the terminal being the serving cell indicated by the cell identification information, it is determined that the service time takes effect.

For example, the cell indicated by the cell identification information is the A cell, and the serving cell where the terminal is located is also the A cell, and it is determined that the service time takes effect.

As shown in FIG. 15 , a method for cell reselection is provided in this embodiment, wherein, applied to a terminal, the method includes:

Step 151, in response to the terminal being in the geographic area indicated by the location area identification information, determine that the service time is effective; and/or, in response to the local time obtained by the terminal being within the time period indicated by the time identification information, determine that the service time is effective; and/or , in response to that the current serving cell acquired by the terminal is the serving cell indicated by the cell identification information, it is determined that the service time takes effect.

In one embodiment, the terminal acquires its own location information, and determines whether the terminal is located in the geographic area indicated by the location area identification information; in response to the terminal being located in the geographic area, it is determined that the service time is effective.

In one embodiment, the terminal acquiring the local UTC time may acquire the local UTC time through a system message block (SIB9).

In one embodiment, the terminal determines whether the local UTC time is within the time period indicated by the time identification information, and if it is within the time period, determines that the service time is valid.

In one embodiment, the terminal acquires the cell identity of the current serving cell, for example, PCI and/or GCI.

In one embodiment, it is determined that the service time is valid in response to the identification of the serving cell of the terminal being the same as the cell identification information indicating that the cell identification is the same.

In one embodiment, based on the effective service time, the terminal performs neighbor cell measurement and completes cell reselection before the time when the network side stops providing services to the terminal.

In one embodiment, the service time is time A when the service is stopped for the terminal; the effective range information is location area identification information, and the geographic area indicated by the location area identification information is area a. The terminal acquires the location information of the terminal. In response to the terminal being located in the area a, it is determined that the service time A takes effect at the moment. After time A takes effect, the terminal performs neighbor cell measurement before time A to complete cell reselection.

In one embodiment, the service time is the corresponding system frame number A when the service is stopped to the terminal; the valid range information is time identification information, and the time period indicated by the time identification information is the a period. The terminal obtains the time b of the local UTC time, and determines that the frame number A of the service time system takes effect in response to the obtained time b of the local UTC time within the period a. After the system frame number A takes effect, the terminal performs neighbor cell measurement before the system frame number A to complete cell reselection.

In one embodiment, the service time is time A when the service is stopped for the terminal; the effective range information is cell identification information, and the cell indicated by the cell identification information is cell a. In response to the serving cell of the terminal being the a cell, it is determined that the service time A takes effect at the moment. After time A takes effect, the terminal performs neighbor cell measurement before time A to complete cell reselection.

As shown in FIG. 16 , this embodiment provides a method for cell reselection, which is applied to a terminal, and the method includes:

Step 161: Receive a system message carrying indication information; or, receive a radio resource control RRC message carrying indication information; or, receive a random access message carrying indication information.

In an embodiment, a terminal in a disconnected state receives a system message that carries indication information and is sent by the network side.

In one embodiment, the terminal receives an RRC message carrying indication information after the terminal establishes an RRC connection with the network side.

In one embodiment, during the random access process, the terminal receives a random access message carrying indication information.

In order to further understand the embodiments of the present disclosure, an example is used for further description below:

Example 1: The service time is UTC time, assuming that the satellite circles the earth once and the number of feeder link exchanges is 5, it corresponds to 5 service times, and each switching time corresponds to an effective area on the earth.

Service time information, including the service time.

Effective range information, including the effective area. This can be indicated by a valid flag. For example, indicated by Area1, Area 2, Area 3, Area 4 and Area 5.

The corresponding relationship between the service time information and the effective range information can be:

UTC1 (time information), Area 1 (valid identification);

UTC2 (time information), Area 2 (valid identification);

UTC3 (time information), Area 3 (valid identification);

UTC4 (time information), Area 4 (valid identification);

UTC5 (time information), Area 5 (valid identification);

The method includes:

Step a, the network side sends indication information to the terminal through a system message;

Step b: After the terminal receives the indication information, obtain the location information of the terminal.

Step c, if the terminal is located in one of the above-mentioned 5 areas indicated by the effective identification, for example, in area 2, it is determined that the time when the current serving cell stops providing services to the terminal is UTC2, and the terminal needs to start the adjacent cell before the time of UTC2. measurement and complete cell reselection.

Step d, if the location of the terminal is not in one of the above-mentioned 5 areas indicated by the effective identification, the time information that any of the above-mentioned cells stops providing services to the terminal is not applied. At this time, if the terminal needs to perform cell reselection, the S criterion is used. and R criterion for cell reselection.

As shown in FIG. 17 , an apparatus for cell reselection provided in an embodiment of the present disclosure, wherein, applied to the network side, the apparatus includes a sending module 171; wherein,

a sending module 171, configured to send indication information;

As shown in FIG. 18 , an embodiment of the present disclosure provides an apparatus for cell reselection, which is applied to a terminal, and an apparatus includes a cell reselection module 181; wherein,

The cell reselection module 181 is configured to: perform cell reselection according to the indication information;

Regarding the apparatus in the above-mentioned embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment of the method, and will not be described in detail here.

Embodiments of the present disclosure provide a communication device, the communication device includes:

processor;

memory for storing processor-executable instructions;

The processor is configured to, when executing the executable instructions, implement the method applied to any embodiment of the present disclosure.

The processor may include various types of storage media, which are non-transitory computer storage media that can continue to memorize and store information on the communication device after the power is turned off.

The processor can be connected to the memory through a bus or the like, and is used to read the executable program stored on the memory.

Embodiments of the present disclosure further provide a computer storage medium, wherein the computer storage medium stores a computer-executable program, and when the executable program is executed by a processor, implements the method of any embodiment of the present disclosure.

Regarding the apparatus in the above-mentioned embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be described in detail here.

As shown in FIG. 19 , an embodiment of the present disclosure provides a structure of a terminal.

Referring to the terminal 800 shown in FIG. 19, this embodiment provides a terminal 800, which may be a mobile phone, a computer, a digital broadcasting terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc. .

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

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

Memory 804 is configured to store various types of data to support operation at device 800 . Examples of such data include instructions for any application or method operating on the terminal 800, contact data, phonebook data, messages, pictures, videos, and the like. Memory 804 may be implemented by any type of volatile or nonvolatile storage device or combination thereof, such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Magnetic or Optical Disk.

Power supply assembly 806 provides power to various components of terminal 800 . Power supply components 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to terminal 800 .

Multimedia component 808 includes screens that provide an output interface between terminal 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touch, swipe, and gestures on the touch panel. A touch sensor can sense not only the boundaries of a touch or swipe action, but also the duration and pressure associated with the touch or swipe action. In some embodiments, the multimedia component 808 includes a front-facing camera and/or a rear-facing camera. When the device 800 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each of the front and rear cameras can be a fixed optical lens system or have focal length and optical zoom capability.

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

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

Sensor assembly 814 includes one or more sensors for providing various aspects of the status assessment of terminal 800 . For example, the sensor component 814 can detect the open/closed state of the device 800, the relative positioning of components, such as the display and keypad of the terminal 800, the sensor component 814 can also detect the position change of the terminal 800 or a component of the terminal 800, the user The presence or absence of contact with the terminal 800, the orientation or acceleration/deceleration of the terminal 800 and the temperature change of the terminal 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects in the absence of any physical contact. Sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

Communication component 816 is configured to facilitate wired or wireless communication between terminal 800 and other devices. The terminal 800 can access a wireless network based on a communication standard, such as Wi-Fi, 2G or 3G, or a combination thereof. In one exemplary embodiment, the communication component 816 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component 816 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

In an exemplary embodiment, terminal 800 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable A gate array (FPGA), controller, microcontroller, microprocessor or other electronic component implementation is used to perform the above method.

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

As shown in FIG. 20 , an embodiment of the present disclosure shows a structure of a base station. For example, the base station 900 may be provided as a network-side device. 20, the base station 900 includes a processing component 922, which further includes one or more processors, and a memory resource represented by memory 932 for storing instructions executable by the processing component 922, such as application programs. An application program stored in memory 932 may include one or more modules, each corresponding to a set of instructions. Additionally, the processing component 922 is configured to execute instructions to perform any of the aforementioned methods applied to the base station.

The base station 900 may also include a power supply assembly 926 configured to perform power management of the base station 900, a wired or wireless network interface 950 configured to connect the base station 900 to a network, and an input output (I/O) interface 958. Base station 900 may operate based on an operating system stored in memory 932, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™ or the like.

Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any modifications, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or techniques in the technical field not disclosed by this disclosure . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

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

Claims

A method for cell reselection, wherein, applied to the network side, the method includes:

send instructions;

The indication information includes: service time information and effective range information; the service time information indicates the service time during which the cell provides services to the terminal; and the effective range information indicates the effective range in which the service time is effective.
The method according to claim 1, wherein the service time includes at least one of the following:

the moment when the cell stops providing services to the terminal;

The length of time that the cell can provide services to the terminal.
The method according to claim 1, wherein the service time information includes at least one of the following:

The first time information includes: system frame information of the system frame when the cell stops providing services to the terminal;

The second time information includes: time information when the cell stops providing services to the terminal;

The third time information includes: duration information that the cell can provide services to the terminal.
The method according to claim 3, wherein the system frame information includes one of the following:

The system frame number of the system frame;

The starting system frame number and the system frame number offset relative to the starting system frame number.
The method according to claim 3, wherein the time information includes at least one of the following:

UTC duration information;

UTC time information.
The method according to claim 1, wherein the effective scope information includes at least one of the following:

location area identification information, indicating a geographic area; wherein, in response to the terminal being in the geographic area indicated by the location area identification information, the service time takes effect;

Time identification information, indicating a time period and/or a moment; wherein, in response to the local time obtained by the terminal being within the time period indicated by the time identification information and/or the local time obtained by the terminal being the moment indicated by the time identification information, The said service hours are effective;

The cell identification information indicates a serving cell; wherein, in response to the terminal being in the serving cell indicated by the cell identification information, the service time takes effect.
The method of claim 6, wherein the method further comprises:

The geographic area is determined according to the geographic area covered by the satellite signal when the feeder link is exchanged.
The method of claim 6, wherein the method further comprises:

Determine the time period indicated by the time identification information according to the time period in which the feeder link is exchanged;

or,

The time indicated by the time identification information is determined according to the time at which the feeder link is switched.
The method of claim 6, wherein the method further comprises:

The identifier of the serving cell is determined according to the cell identifier of the cell covered by the signal when the feeder link is exchanged.
The method of claim 1, wherein the method further comprises:

The service time indicated by the service time information is determined according to the time difference between the current time and the time when feeder link switching is started.
The method according to claim 1, wherein the indication information includes a plurality of the service time information; wherein, each of the service time information is associated with one piece of the effective range information.
The method according to claim 1, wherein the sending the indication information comprises:

sending a system message carrying the indication information;

or,

sending a radio resource control RRC message carrying the indication information;

or,

Send a random access message carrying the indication information.
The method of claim 12, wherein the method further comprises:

In response to the system message carrying the indication information, the indication information is updated during feeder link switching.
The method according to claim 13, wherein, in response to the system message carrying the indication information, updating the indication information when performing feeder link switching, comprising:

In response to the system message carrying the indication information corresponding to a single feeder link exchange, updating the indication information each time a feeder link exchange is performed;

or,

In response to the system message carrying indication information corresponding to multiple exchanges of feeder links, the indication information is updated when a feeder link exchange other than the multiple exchanges of feeder links is performed.
A method for cell reselection, wherein, applied to a terminal, the method includes:

Perform cell reselection according to the instruction information;

The indication information includes: service time information and effective range information; the service time information indicates the service time during which the cell provides services to the terminal; and the effective range information indicates the effective range in which the service time is effective.
The method according to claim 15, wherein the indication information comprises one of the following:

Indication information sent by the network side;

The indication information preconfigured in the terminal.
The method according to claim 15, wherein the service time includes at least one of the following:

the moment when the cell stops providing services to the terminal;

The length of time that the cell can provide services to the terminal.
The method according to claim 15, wherein the service time information includes at least one of the following:

The first time information includes: system frame information of the system frame when the cell stops providing services to the terminal;

The second time information includes: time information when the cell stops providing services to the terminal;

The third time information includes: duration information that the cell can provide services to the terminal.
The method according to claim 18, wherein the system frame information includes one of the following:

The system frame number of the system frame;

The starting system frame number and the system frame number offset relative to the starting system frame number.
The method according to claim 18, wherein the time information includes at least one of the following:

UTC duration information;

UTC time information.
The method according to claim 15, wherein the effective scope information includes at least one of the following:

location area identification information, indicating a geographic area; wherein, in response to the terminal being in the geographic area indicated by the location area identification information, the service time takes effect;

Time identification information, indicating a time period and/or a moment; wherein, in response to the service time being within the time period indicated by the time identification information and/or the local time obtained by the terminal being the moment indicated by the time identification information, the The above service hours will take effect;

The cell identification information indicates a serving cell; wherein, in response to the terminal being in the serving cell indicated by the cell identification information, the service time takes effect.
The method according to claim 21, wherein the performing cell reselection according to the indication information comprises:

In response to determining that the service time is effective according to the indication information, perform cell reselection before the time indicated by the service time information to stop providing services to the terminal;

or,

In response to determining that the service time is invalid according to the indication information, cell reselection is performed based on the R criterion and the S criterion.
The method of claim 22, wherein the method comprises:

In response to the terminal being in the geographic area indicated by the location area identification information, determining that the service time is valid;

and / or,

In response to the local time obtained by the terminal being within the time period indicated by the time identification information, determining that the service time is effective;

and / or,

In response to the current serving cell acquired by the terminal being the serving cell indicated by the cell identification information, it is determined that the serving time is effective.
The method of claim 15, wherein the method further comprises:

receiving a system message carrying the indication information;

or,

receiving a radio resource control RRC message carrying the indication information;

or,

A random access message carrying the indication information is received.
An apparatus for cell reselection, wherein, applied to the network side, the apparatus includes a sending module; wherein,

The sending module is configured to send indication information;

The indication information includes: service time information and effective range information; the service time information indicates the service time during which the cell provides services to the terminal; and the effective range information indicates the effective range in which the service time is effective.
An apparatus for cell reselection, wherein, applied to a terminal, the apparatus includes a cell reselection module; wherein,

The cell reselection module is configured to: perform cell reselection according to the indication information;

The indication information includes: service time information and effective range information; the service time information indicates the service time during which the cell provides services to the terminal; and the effective range information indicates the effective range in which the service time is effective.
A communication device, comprising:

antenna;

memory;

a processor, connected to the antenna and the memory, respectively, configured to control the transmission and reception of the antenna by executing computer-executable instructions stored on the memory, and capable of implementing claims 1 to 14 or claims 15 to 15 The method provided by any one of claim 24.
A computer storage medium storing computer-executable instructions, which can implement the method provided by any one of claims 1 to 14 or claims 15 to 24 after the computer-executable instructions are executed by a processor .