WO2022247861A1

WO2022247861A1 - Method for determining paging time window ptw and communication apparatus

Info

Publication number: WO2022247861A1
Application number: PCT/CN2022/094992
Authority: WO
Inventors: 韩立锋
Original assignee: 展讯通信（上海）有限公司
Priority date: 2021-05-28
Filing date: 2022-05-25
Publication date: 2022-12-01
Also published as: CN115413027A

Abstract

Embodiments of the present application disclose a method for determining a paging time window (PTW) and a communications apparatus. In the method, the PTW of a terminal is adjusted to be within a coverage time period of a satellite at a service cell of the terminal, so that the terminal can wake up within the coverage time period of the satellite at the service cell of the terminal to receive paging messages, thereby helping to avoid missing the reception of paging messages, and helping to reduce the probability of the terminal missing the reception of paging messages.

Description

Method and communication device for determining paging time window PTW

technical field

The present application relates to the field of communication technologies, and in particular to a method and a communication device for determining a paging time window PTW.

Background technique

In wireless communication, a terminal receives a paging message within a paging time window (Paging Time Window, PTW). In the prior art, for a terminal supporting extended Discontinuous Reception (eDRX), the start time and end time of PTW are determined according to the terminal identifier UE_ID, eDRX cycle and paging time window length L. However, in satellite communications, limited by the density of satellite deployment, there will be discontinuous coverage scenarios. Therefore, the existing method of determining the PTW may cause the PTW of the terminal to be located outside the coverage period of the satellite in the serving cell of the terminal, thereby causing the terminal to miss the opportunity to receive the paging message.

Therefore, in satellite communication, the research on how to determine the PTW to reduce the possibility that the terminal misses receiving the paging message has important practical value.

Contents of the invention

The embodiment of the present application provides a method and a communication device for determining a PTW. By adjusting the PTW to the coverage period of the satellite in the serving cell of the terminal, it helps to reduce the possibility that the terminal misses receiving a paging message.

In the first aspect, the embodiment of the present application provides a method for determining PTW, including:

Determine the first PTW according to the terminal identifier and the eDRX cycle, and the terminal identifier is used to identify the terminal; and adjust the first PTW to the second according to the time position relationship between the first PTW and the first time period PTW, the second PTW is located within the first time period, and the first time period is a time period when a satellite used to serve the terminal is located in a serving cell of the terminal.

Optionally, a paging message is transmitted within the second PTW.

For example, for the terminal, the terminal receives the paging message within the second PTW; for another example, for the network device, the network device sends the paging message within the second PTW.

Optionally, the first time period includes a first sub-time period and a second sub-time period, and the first sub-time period is that the first satellite used to serve the terminal is located in the serving cell of the terminal time period, the second sub-time period is a time period during which the second satellite serving the terminal is located in the serving cell of the terminal, and the first satellite is located in the within the serving cell of the terminal.

Exemplarily, when the first time period includes a first sub-time period and a second sub-time period, the second time period is within the first sub-time period, or the second time period is within the second sub-time period.

Optionally, according to the time position relationship between the first PTW and the first time period, the first PTW may be adjusted to the second PTW based on the following manner:

If the first time interval is greater than or equal to the second time interval, or the second time interval is less than the first threshold, adjusting the start time of the first PTW according to the start time of the second sub-time period, obtain the second PTW, the first time interval is the duration between the start time of the first PTW and the end time of the first sub-time period, and the second time interval is the first The duration between the start moment of the PTW and the start moment of the second sub-time period.

Optionally, the start moment of the second PTW is the start moment of the second sub-time period.

Optionally, the starting moment of the second PTW satisfies the following expression:

PTW_start=t1+t3; or, PTW_start=t1+t_offset1+t3;

Wherein, PTW_start is the start moment of the second PTW, t1 is the start moment of the second sub-time period, and t3 is used to indicate the time shift occurring within the time period [t1, t2-L], t_offset1 is the transmission delay of the second satellite, t2 is the end moment of the second sub-time period, and L is the window length of the paging time window of the terminal.

Optionally, the time shift t3 can be determined based on:

According to the terminal identifier, the total number of floors (N1/M1) that can be shifted in [t1, t2-L], the unit duration of movement M1, determine the time shift t3, where N1 is the total duration of movement [t1,t2-L].

Optionally, the time shift t3 satisfies the following expression:

t3=(UE_ID mod(floor(N1/M1)))*M1,

or,

t3=floor((UE_ID mod(N1/M1)))*M1;

Wherein, UE_ID is the terminal identifier, mod() is a modulo function, and floor() is a round-down function.

Optionally, according to the time position relationship between the first PTW and the first time period, the first PTW may also be adjusted to the second PTW based on the following manner:

If the first time interval is less than the second threshold, the end time of the first PTW is adjusted according to the end time of the first sub-time period to obtain the second PTW, and the first time interval is the first The duration between the start moment of the PTW and the end moment of the first sub-time period.

Optionally, the end time of the second PTW is the end time of the first sub-time period.

Optionally, the end time of the second PTW satisfies the following expression:

PTW_end=t2+t4;

or,

PTW_end=t2+t_offset2+t4;

Wherein, PTW_end is the end time of the second PTW, t2 is the end time of the first sub-time period, t4 is used to indicate the time shift occurring within the time period [t1-L, t2], and t_offset2 is The transmission delay of the first satellite, t1 is the starting moment of the first sub-time period, and L is the window length of the paging time window of the terminal.

Optionally, the time shift t4 can also be determined based on the following manner:

According to the terminal identifier, the total number of floors (N2/M2) that can be shifted within [t1-L, t2], and the unit duration of movement M2, determine the time shift t4, where N2 is the total duration that can be moved [t1-L,t2].

Optionally, the time shift t4 satisfies the following expression:

t4＝(UE_ID mod(floor(N2/M2)))*M2,

or,

t4=floor((UE_ID mod(N2/M2)))*M2;

PTW_start = ( _{PTW_start} -L*100+1) mod 1024,

Wherein, PTW_start is the start time of the second PTW.

In a second aspect, the embodiment of the present application provides a terminal, including a determination module and an adjustment module;

Wherein, the determining module is used to determine the first PTW according to the terminal identifier and the eDRX cycle, and the terminal identifier is used to identify the terminal;

The adjustment module is configured to adjust the first PTW to a second PTW according to the time position relationship between the first PTW and the first time period, and the second PTW is located within the first time period, The first time period is a time period when the satellite used to serve the terminal is located in the serving cell of the terminal.

Optionally, the terminal further includes a communication module, configured to receive a paging message in the second PTW.

In a third aspect, the embodiment of the present application provides a network device, including: a determination module and an adjustment module;

Optionally, the network device further includes a communication module, configured to send a paging message in the second PTW.

In a fourth aspect, an embodiment of the present application provides a communication device, including: a processor and a memory; wherein the memory is used to store a computer program, and the processor is used to call the computer program, so that the communication device executes The first aspect and any optional method of the first aspect.

Exemplarily, the communication device may be a chip, a terminal or a network device.

In a fifth aspect, an embodiment of the present application further provides a communication system, where the communication system includes a communication device, and the communication device is configured to perform the first aspect and any optional method of the first aspect.

In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by an electronic device, the first aspect and any of the first aspect can be realized. an optional method.

In the embodiment of the present application, by adjusting the PTW to the coverage time period of the satellite in the service cell of the terminal, the terminal can wake up to receive paging messages during the coverage time period of the satellite in the service cell of the terminal, thereby facilitating In order to avoid missing the paging message, it is helpful to reduce the probability that the terminal misses receiving the paging message.

Description of drawings

Fig. 1 is a schematic flow chart of a method for determining PTW according to an embodiment of the present application;

FIG. 2a is a schematic diagram of a method for adjusting a first PTW according to an embodiment of the present application;

FIG. 2b is a schematic diagram of another method for adjusting the first PTW according to an embodiment of the present application;

Fig. 3a is a schematic diagram of another method for adjusting the first PTW according to the embodiment of the present application;

FIG. 3b is a schematic diagram of another method for adjusting the first PTW according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a terminal according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a network device according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

The terms "first", "second" and the like in the specification, claims and drawings of the present application are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, methods, products or apparatuses.

Reference in this application to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

It should be understood that the terminal in the embodiments of the present application may refer to various forms of user equipment (user equipment), access terminal, user unit, user station, mobile station, mobile station (mobile station, built as MS), remote station, remote terminal, mobile device, user terminal, terminal equipment, wireless communication device, user agent, or user device. The terminal device can also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), Handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks or future evolutions of Public Land Mobile Networks (PLMN for short) ), etc., which are not limited in this embodiment of the present application.

The network devices in this embodiment of the present application include access network devices and core network devices. For example, a mobility management entity (MME). Communication between network devices and terminals is via wired or wireless connections. Other network devices, such as base stations, switches, and routers, may also be included between the network device and the terminal.

The core network described in the embodiment of the present application may be an evolved packet core network (evolved packet core, EPC for short), a 5G Core Network (5G core network), or a new core network in a future communication system. The 5G Core Network is composed of a group of devices, and implements access and mobility management functions (Access and Mobility Management Function, AMF), and provides functions such as data packet routing and forwarding, and QoS (Quality of Service) management. User plane function (User Plane Function, UPF), session management function (Session Management Function, SMF) that provides functions such as session management, IP address allocation and management, etc. EPC can be composed of MME that provides functions such as mobility management and gateway selection, Serving Gateway (S-GW) that provides functions such as data packet forwarding, and PDN Gateway (P-GW) that provides functions such as terminal address allocation and rate control.

The base station (base station, BS for short) in the embodiment of the present application may also be referred to as base station equipment, or access network equipment, etc., and is a device deployed on a radio access network (RAN) to provide wireless communication functions. For example, the equipment providing base station function in 2G network includes base wireless transceiver station (English: base transceiver station, referred to as BTS), the equipment providing base station function in 3G network includes Node B (NodeB), and the equipment providing base station function in 4G network Including evolved Node B (evolved NodeB, eNB), in wireless local area networks (wireless local area networks, referred to as WLAN), the equipment that provides base station functions is the access point (access point, referred to as AP), 5G new wireless (New Radio , referred to as NR), the device gNB that provides base station functions, and the node B (ng-eNB) that continues to evolve, wherein, the gNB and the terminal use NR technology for communication, and the ng-eNB and the terminal use E-UTRA ( Evolved Universal Terrestrial Radio Access) technology for communication, both gNB and ng-eNB can be connected to the 5G core network. The base station in the embodiment of the present application also includes devices that provide base station functions in future new communication systems, and the like.

In the prior art, due to the existing method of determining the PTW, the PTW of the terminal may be located outside the coverage period of the satellite in the serving cell of the terminal, thus causing the terminal to miss the opportunity to receive the paging message. Therefore, the present application proposes a method for determining the PTW, which can effectively reduce the probability that the terminal misses receiving the paging message.

It should be noted that, in this embodiment of the present application, the method for determining the PTW may be executed by a terminal or a network device, and execution by a terminal is used as an example. As shown in Figure 1, it is a method for determining PTW according to the embodiment of the present application, which specifically includes the following steps:

101. The terminal determines a first PTW according to a terminal identifier and an eDRX cycle, where the terminal identifier is used to identify the terminal.

Wherein, the first PTW can be understood as an initial PTW, that is, according to the terminal identifier UE_ID, determine the superframe where the paging time window is located, and then further determine the sending time range of the paging message within the range of the superframe. During the paging time window, the terminal will monitor the paging message delivered by the network side and respond. For example, the method for the terminal to determine the first PTW according to the terminal identifier and the eDRX cycle can refer to the method for determining the PTW in the prior art. Of course, the terminal in the embodiment of the present application can also determine the initial PTW according to other methods, not limited to the method based on the terminal identifier and the eDRX cycle. The eDRX cycle is determined. For example, the terminal determines the first PTW according to the terminal identifier, the eDRX cycle, and the window length of the paging time window.

For example, the terminal can use the following method to calculate the start time and end time of the first PTW:

First, according to the terminal identifier (UE_ID) and the eDRX cycle (T _eDRX,H ), the superframe H-SFN where the first PTW is located is determined.

As an example, H-SFN satisfies the following expression:

H-SFN mod T _eDRX,H ＝(UE_ID_H mod T _eDRX,H ),

Second, determine the starting position PTW_start of the first PTW in the H-SFN. Among them, the H-SFN where PTW_start is located satisfies:

SFN＝256*i _eDRX ,

Wherein, i _eDRX =floor(UE_ID_H/T _eDRX,H ) mod 4.

Then, determine the end position PTW_end of the first PTW in the H-SFN. Among them, the SFN where PTW_end is located satisfies:

SFN＝(PTW_start+L*100-1)mod 1024,

Wherein, L is the window length of the paging time window, and the unit is second.

For example, when the terminal reaches its paging cycle, it will perform step 101 to determine its own first PTW, wherein the paging cycle of the terminal is determined after negotiation between the terminal and the network side.

102. The terminal adjusts the first PTW to a second PTW according to the time position relationship between the first PTW and the first time period, the second PTW is located within the first time period, and the first time period is used to serve the terminal The time period during which a satellite is located within the serving cell of a terminal.

For example, when the first PTW is not within the first time period, the first PTW is adjusted, specifically, when the first PTW is not within the first time period, the first PTW is adjusted to the second PTW. Further, in some other embodiments, when the first PTW is within the first time period, the first PTW may not be adjusted.

Certainly, in some embodiments of the present application, no matter whether the first PTW is within the first time period or not, the first PTW is adjusted to the second PTW.

In the embodiment of the present application, since the terminal can adjust the first PTW to the second PTW, and the second PTW is within the first time period, the terminal can wake up within the first time period to receive the paging message, Avoiding that the terminal misses receiving the paging message helps reduce the probability that the terminal misses receiving the paging message.

In some embodiments, the first time period includes a first sub-time period and a second sub-time period, the first sub-time period is a time period when the first satellite serving the terminal is located in the serving cell of the terminal, and the second sub-time period is The sub-time period is a time period during which the second satellite serving the terminal is located in the serving cell of the terminal, and the first satellite is located in the serving cell of the terminal prior to the second satellite. Exemplarily, in this case, the second PTW may be located within the first sub-time period, or the second PTW may be located within the second sub-time period.

For example, the second satellite may be a satellite next to the first satellite located in the serving cell of the terminal, and there may be several satellites between the second satellite and the first satellite, which is not particularly limited.

In some embodiments, refer to FIG. 2a, which is a schematic diagram of a method for adjusting the first PTW according to an embodiment of the present application. Point A is between the end moment of the first sub-time period and the start moment of the second sub-time period. midpoint between. In step 102, the first PTW is adjusted to the second PTW according to the time position relationship between the first PTW and the first time period, including:

If the first time interval Δt1 is greater than or equal to the second time interval Δt2, or the second time interval Δt2 is smaller than the first threshold Y1 (equivalent to the first time interval Δt1 being greater than the third threshold Y3), according to the second sub- Adjust the starting time of the first PTW to obtain the second PTW. The first time interval Δt1 is the duration between the starting time of the first PTW and the end time of the first sub-time period. The second time interval Δt2 is the duration between the start moment of the first PTW and the start moment of the second sub-time period.

In some embodiments, specific values of the first threshold Y1 and the third threshold Y3 can be set according to actual conditions. Exemplarily, the first threshold Y1 is less than 1/2 eDRX cycle. In another example, the third threshold Y3 is greater than 1/2 eDRX cycle.

For example, the first threshold Y1 is 1/4 eDRX cycle, and the third threshold Y3 is 3/4 eDRX cycle. In this case, when it is judged that the first PTW is closer to the second sub-time period, the first PTW is adjusted to the second PTW, and the second PTW is located within the second sub-time period. Ensure that the terminal can receive the paging message by delaying waking up, so as to avoid missing the reception of the paging message.

In some embodiments, when the first PTW is adjusted to be the second PTW, and the second PTW is located within the second sub-time period, referring to FIG. The start time, that is, adjust the start time of the first PTW to be aligned with the start time of the second sub-time period. However, if the start time of the first PTW of a large number of terminals is aligned with the start time of the second sub-time period Alignment will cause paging congestion.

In some other embodiments, when the first PTW is adjusted to be the second PTW, and the second PTW is within the second sub-time period, reference may also be made to FIG. 2b, which is another example of adjusting the first PTW according to an embodiment of the present application. The schematic diagram of the method, so that the starting moment of the second PTW satisfies the following expression:

PTW_start=t1+t3;

or,

PTW_start=t1+t_offset1+t3;

Among them, PTW_start is the start time of the second PTW, t1 is the start time of the second sub-time period, t3 is used to indicate the time shift occurring in the time period [t1, t2-L], t_offset1 is the second The transmission delay of the satellite, wherein, the transmission delay of the satellite refers to the transmission duration between the satellite and the terminal, t_offset1 refers to the transmission duration between the second satellite and the terminal; t2 is the end moment of the second sub-time period, L It is the window length of the terminal's paging time window. In Fig. 2b, the second PTW in the solid line box and the second PTW in the dotted line box indicate the movable range [t1, t2-L] of the second PTW.

This method of adjusting the first PTW to the second PTW discretizes the starting position of the terminal PTW in the second sub-time period, which helps to reduce the problem caused by a large number of terminals due to the need to adjust the starting position of the PTW. paging congestion.

In some embodiments, the terminal may determine the time shift t3 based on the following manner:

According to the terminal identifier UE_ID, the total number of floors (N1/M1) that can be shifted in [t1, t2-L], and the unit duration of movement M1, determine the time shift t3, where floor() is rounded down function, N1 is the total movable time [t1,t2-L]. M1 is smaller than N1, and M1 is a positive integer.

Exemplarily, the time shift t3 may satisfy the following expression:

t3=(UE_ID mod(floor(N1/M1)))*M1,

or,

t3=floor((UE_ID mod(N1/M1)))*M1;

Wherein, UE_ID is a terminal identifier, and mod() is a modulo function.

Specifically, since the terminal identifier UE_ID of each terminal is different, t3 determined according to the terminal identifier UE_ID is different, so that the discretization process of the starting position of the PTW of the terminal in the second sub-time period can be realized, and paging can be avoided. congestion.

It should be noted that the foregoing is only an example for determining the time displacement t3, and this embodiment of the present application does not limit the specific implementation manner of determining the time displacement t3. In the embodiment of the present application, the time displacement t3 is used to represent the time length during which the initial position of the PTW of the terminal can move.

In some other embodiments, refer to FIG. 3 a , which is a schematic diagram of another method for adjusting the first PTW according to an embodiment of the present application.

For example, according to the time position relationship between the first PTW and the first time period, the terminal may adjust the first PTW to the second PTW in the following manner:

If the first time interval Δt1 is less than the second threshold Y2 (equivalent to the second time interval Δt2 being greater than the fourth threshold Y4), according to the end time of the first sub-time period, adjust the end time of the first PTW to obtain the second PTW , the first time interval Δt1 is the duration between the start time of the first PTW and the end time of the first sub-time period, and the second time interval Δt2 is the distance between the start time of the first PTW and the end time of the second sub-time period The duration between start moments.

In some embodiments, specific values of the second threshold Y2 and the fourth threshold Y4 can be set according to actual conditions. Exemplarily, the second threshold Y2 is less than 1/2 eDRX cycle. In another example, the fourth threshold Y4 is greater than 1/2 eDRX cycle.

For example, the second threshold Y2 is 1/4 eDRX cycle, and the fourth threshold Y4 is 3/4 eDRX cycle. In this case, when it is judged that the first PTW is closer to the first sub-time period, the first PTW is adjusted to the second PTW, and the second PTW is located within the first sub-time period. Ensure that the terminal can receive the paging message by waking up in advance, so as to avoid missing the reception of the paging message.

In some embodiments, when the first PTW is adjusted to be the second PTW, and the second PTW is within the first sub-time period, referring to FIG. 3a, the end moment of the second PTW can be adjusted to be the end of the first sub-time period. Time, that is, adjust the end time of the first PTW to be aligned with the end time of the first sub-time period. However, if the end times of the first PTW of a large number of terminals are all aligned with the end time of the first sub-time period, it will cause Paging congestion.

In some other embodiments, when the first PTW is adjusted to the second PTW, and the second PTW is within the first sub-time period, you can also refer to FIG. 3b, which is another example of adjusting the first PTW according to the embodiment of the present application. The schematic diagram of the method, so that the end time of the second PTW satisfies the following expression:

PTW_end=t2+t4;

or,

PTW_end=t2+t_offset2+t4;

Among them, PTW_end is the end time of the second PTW, t2 is the end time of the first sub-time period, t4 is used to indicate the time shift occurring in the time period [t1-L, t2], t_offset2 is the first satellite’s Transmission delay, t_offset2 refers to the transmission duration between the first satellite and the terminal; t1 is the starting moment of the first sub-time period, and L is the window length of the paging time window of the terminal. In Fig. 3b, the second PTW in the solid line box and the second PTW in the dotted line box indicate the movable range [t1-L, t2] of the second PTW.

This method of adjusting the first PTW to the second PTW discretizes the end position of the terminal PTW in the first sub-time period, which helps to reduce the search for a large number of terminals due to the need to adjust the end position of the PTW. call congestion.

Further, in the embodiment of the present application, at this time, the start time of the second PTW satisfies the following expression:

PTW_start = ( _{PTW_start} -L*100+1) mod 1024,

Wherein, PTW_start is the start time of the second PTW.

In some embodiments, the terminal may determine the time shift t4 based on the following manner:

According to the terminal identifier UE_ID, the total number of floors (N2/M2) that can be shifted in [t1-L, t2], and the unit duration of movement M2, determine the time shift t4, where floor() is rounded down function, N2 is the total moving time [t1-L,t2]. M2 is smaller than N2, and M2 is a positive integer.

Exemplarily, the time shift t4 may satisfy the following expression:

t4＝(UE_ID mod(floor(N2/M2)))*M2,

or,

t4=floor((UE_ID mod(N2/M2)))*M2;

Wherein, UE_ID is a terminal identifier, and mod() is a modulo function.

Specifically, since the terminal identifier UE_ID of each terminal is different, t4 determined according to the terminal identifier UE_ID is different, so that the discretization processing of the end position of the PTW of the terminal within the first sub-time period can be realized, and paging congestion can be avoided .

It should be noted that the above is only an example of determining the time displacement t4, and the embodiment of the present application does not limit the specific implementation manner of determining the time displacement t4. In the embodiment of the present application, the time displacement t4 is used to represent the time length during which the end position of the PTW of the terminal can move.

Further, in some embodiments, the terminal receives the paging message within the second PTW.

In addition, the network device may also determine the PTW based on the method for determining the PTW provided in the embodiment of the present application. For details, refer to the relevant steps in the method shown in FIG. 1 , and repeated descriptions will not be repeated here. In the case where both the network device and the terminal adopt the method for determining the PTW in the embodiment of the present application, the network device can send a paging message in the corresponding PTW, and the terminal can receive the paging message in the corresponding PTW, thereby facilitating further The probability or likelihood that a terminal misses receiving a paging message is reduced.

It should be noted that, for a network device, in some embodiments, the network device may trigger the determination of the first PTW according to the terminal identity and the eDRX cycle when reaching its own paging cycle, and then adjust the first PTW to the second For the PTW, specifically, the first PTW and the second PTW may refer to the relevant introduction in FIG. 1 , which will not be repeated here.

In some embodiments, the first threshold Y1 or the third threshold Y3, the second threshold Y2 or the fourth threshold Y4, the propagation delay t_offset1 of the first satellite and/or the propagation delay t_offset2 of the second satellite may be network The device notifies the terminal, so that the terminal can obtain the above information. For example, the network device may broadcast the first threshold Y1 or the third threshold Y3, the second threshold Y2 or the fourth threshold Y4, the propagation delay t_offset1 of the first satellite and/or the propagation delay t_offset2 of the second satellite to the terminal. Of course, in this embodiment of the present application, the network device may also notify the terminal of the above information in other ways, or the terminal obtains the above information in other ways, which is not limited. For example, the terminal determines the first threshold Y1 and so on according to a certain policy or algorithm.

In some other embodiments of the present application, the window length of the paging time window may also be notified to the terminal by the network device, so that the terminal can obtain the window length of the paging time window.

Based on the above embodiment of the method for determining PTW, refer to FIG. 4, which is a schematic structural diagram of a terminal according to an embodiment of the present application; an embodiment of the present application also provides a terminal, including:

The determining module 401 is configured to determine the first PTW according to the terminal identifier and the eDRX cycle, where the terminal identifier is used to identify the terminal;

The adjustment module 402 is configured to adjust the first PTW to a second PTW according to the time position relationship between the first PTW and the first time period, the second PTW is located within the first time period, and the first time period is used for The time period during which the satellites serving the terminal are located within the serving cell of the terminal.

In some embodiments, referring to FIG. 4, the terminal further includes:

The communication module 403 is configured to receive a paging message in the second PTW.

It is worth noting that, for the specific function implementation manner of the terminal, reference may be made to the above description of the method for determining the PTW, which will not be repeated here. Each unit or module in the terminal can be separately or all combined into one or several other units or modules to form, or one (some) units or modules can be further divided into multiple functionally smaller units or modules, which can achieve the same operation without affecting the realization of the technical effects of the embodiments of the present application. The above-mentioned units or modules are divided based on logical functions. In practical applications, the functions of one unit (or module) can also be realized by multiple units (or modules), or the functions of multiple units (or modules) can be realized by one unit (or module) implementation.

Based on the above embodiment of the method for determining PTW, refer to FIG. 5, which is a schematic structural diagram of a network device according to an embodiment of the present application; an embodiment of the present application also provides a network device, including:

The determining module 501 is configured to determine the first PTW according to the terminal identifier and the eDRX cycle, where the terminal identifier is used to identify the terminal;

The adjustment module 502 is configured to adjust the first PTW to a second PTW according to the time position relationship between the first PTW and the first time period, the second PTW is located within the first time period, and the first time period is used for The time period during which the satellites serving the terminal are located within the serving cell of the terminal.

In some embodiments, referring to FIG. 5, the network device further includes:

The communication module 503 is configured to send a paging message in the second PTW.

It is worth pointing out that, for the specific function implementation manner of the network device, reference may be made to the description of the method for determining the PTW above, and details are not repeated here. Each unit or module in a network device can be combined or combined into one or several other units or modules, or one (some) units or modules can be further divided into multiple functionally smaller ones. units or modules, which can achieve the same operation without affecting the realization of the technical effects of the embodiments of the present application. The above-mentioned units or modules are divided based on logical functions. In practical applications, the functions of one unit (or module) can also be realized by multiple units (or modules), or the functions of multiple units (or modules) can be realized by one unit (or module) implementation.

Based on the descriptions of the foregoing method embodiments and device embodiments, an embodiment of the present application further provides a communication device.

Please refer to FIG. 6 , which is a schematic structural diagram of a communication device according to an embodiment of the present application. As shown in FIG. 6 , the communication device 600 may include a processor 601 and a memory 605 , for example, the processor 601 and the memory 605 are connected through a communication bus 602 . Certainly, other connection manners may also be used between the processor 601 and the memory 605, which are not specifically limited.

In some embodiments, the communication device 600 may further include: a user interface 603 for providing an input interface for the user, wherein the user interface 603 may include a display screen (Display), a keyboard (Keyboard), and optionally, a user interface 603 may also include standard wired interfaces and wireless interfaces.

In some embodiments, the communication device 600 may further include a network interface 604 for providing a network communication function. Optionally, the network interface 604 may include a standard wired interface or a wireless interface (such as a WI-FI interface).

For example, the user interface 603, the network interface 604, the processor 601, and the memory 605 may be connected through the communication bus 602, or may be connected through other connection methods, which are not particularly limited.

In some embodiments, as shown in FIG. 6 , the memory 605 as a computer storage medium may include an operating system, a network communication module, a user interface module, and a device control application program.

In some embodiments, the processor 601 can invoke the device control application program stored in the memory 605 to implement:

Determine the first PTW according to the terminal identifier and the eDRX cycle, where the terminal identifier is used to identify the terminal;

According to the time position relationship between the first PTW and the first time period, the first PTW is adjusted to the second PTW, the second PTW is located in the first time period, and the first time period is that the satellite used to serve the terminal is located in the terminal time period within the serving cell.

In some embodiments, the processor 601 can also call the device control application program stored in the memory 605 to realize:

The paging message is transmitted within the second PTW.

In some embodiments, the first time period includes a first sub-time period and a second sub-time period, the first sub-time period is a time period when the first satellite serving the terminal is located in the serving cell of the terminal, and the second sub-time period is The sub-time period is a time period during which the second satellite serving the terminal is located in the serving cell of the terminal, and the first satellite is located in the serving cell of the terminal prior to the second satellite.

In some embodiments, when the processor 601 adjusts the first PTW to the second PTW according to the time position relationship between the first PTW and the first time period, the following steps are specifically performed:

If the first time interval is greater than or equal to the second time interval, or the second time interval is less than the first threshold, according to the start time of the second sub-time period, adjust the start time of the first PTW to obtain the second PTW, the second A time interval is the duration between the start moment of the first PTW and the end moment of the first sub-time period, and the second time interval is the period between the start moment of the first PTW and the start moment of the second sub-time period duration.

In some embodiments, the start moment of the second PTW is the start moment of the second sub-time period.

In some embodiments, the starting moment of the second PTW satisfies the following expression:

PTW_start=t1+t3;

or,

PTW_start=t1+t_offset1+t3;

PTW_start is the starting moment of the second PTW, t1 is the starting moment of the second sub-time period, t3 is used to indicate the time shift occurring in the time period of [t1,t2-L], t_offset1 is the second satellite’s Transmission delay, t2 is the end moment of the second sub-time period, and L is the window length of the paging time window of the terminal.

Exemplarily, the time shift t3 can be determined based on the following manner:

According to the terminal identification, the total number of floor(N1/M1) that can be shifted in [t1, t2-L], and the unit duration of movement M1, determine the time shift t3, where N1 is the total duration of movement [t1 ,t2-L].

Optionally, the time shift t3 satisfies the following expression:

t3=(UE_ID mod(floor(N1/M1)))*M1,

or,

t3=floor((UE_ID mod(N1/M1)))*M1;

Wherein, UE_ID is a terminal identifier, mod() is a modulo function, and floor() is a rounding down function.

If the first time interval is less than the second threshold, adjust the end time of the first PTW according to the end time of the first sub-time period to obtain the second PTW, the first time interval is the start time of the first PTW and the first sub-time The duration between the end moments of the segment.

In some embodiments, the end moment of the second PTW is the end moment of the first sub-time period.

In some embodiments, the end time of the second PTW satisfies the following expression:

PTW_end=t2+t4;

or,

PTW_end=t2+t_offset2+t4;

Among them, PTW_end is the end time of the second PTW, t2 is the end time of the first sub-time period, t4 is used to indicate the time shift occurring in the time period [t1-L, t2], t_offset2 is the first satellite’s Transmission delay, t1 is the starting moment of the first sub-time period, and L is the window length of the paging time window of the terminal.

According to the terminal identification, the total number of floors (N2/M2) that can be shifted in [t1-L, t2], and the unit duration of movement M2, determine the time shift t4, where N2 is the total duration of movement [t1 -L,t2].

Optionally, the time shift t4 satisfies the following expression:

t4＝(UE_ID mod(floor(N2/M2)))*M2,

or,

t4=floor((UE_ID mod(N2/M2)))*M2;

PTW_start = ( _{PTW_start} -L*100+1) mod 1024,

Wherein, PTW_start is the start time of the second PTW.

It should be understood that the communications device 600 described in the embodiment of the present application may execute the method for determining the PTW described above, and details are not repeated here. In addition, the description of the beneficial effect of adopting the same method will not be repeated here.

For example, the communication apparatus 600 may be a chip, a terminal or a network device, which is not specifically limited.

It should be understood that, in the embodiments of the present application, the processor may be a central processing unit (CPU for short), and the processor may also be other general-purpose processors, digital signal processors (digital signal processor, DSP for short) , application specific integrated circuit (ASIC for short), off-the-shelf programmable gate array (field programmable gate array, FPGA for short) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

It should also be understood that the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the non-volatile memory can be read-only memory (read-only memory, referred to as ROM), programmable read-only memory (programmable ROM, referred to as PROM), erasable programmable read-only memory (erasable PROM, referred to as EPROM) , Electrically Erasable Programmable Read-Only Memory (electrically EPROM, referred to as EEPROM) or flash memory. The volatile memory can be random access memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of random access memory (RAM) are available, such as static random access memory (static RAM (SRAM), dynamic random access memory (DRAM), synchronous Dynamic random access memory (synchronous DRAM, referred to as SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, referred to as DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, referred to as ESDRAM), Synchronously connect dynamic random access memory (synchlink DRAM, referred to as SLDRAM) and direct memory bus random access memory (direct rambus RAM, referred to as DR RAM).

Based on the descriptions of the foregoing method embodiments and device embodiments, embodiments of the present application further provide a communication system, where the communication system includes the communication device provided in the foregoing embodiments.

In addition, it should be pointed out here that the embodiment of the present application also provides a computer-readable storage medium, and the computer-readable storage medium stores a computer program, and when the computer program is executed by an electronic device, it can The foregoing description of the method for determining the PTW is implemented, so details will not be repeated here. In addition, the description of the beneficial effect of adopting the same method will not be repeated here. For the technical details not disclosed in the embodiments of the computer storage medium involved in the present application, please refer to the description of the method embodiments of the present application.

Those of ordinary skill in the art can understand that the computer-readable storage medium can be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), or a random access memory (Random Access Memory, RAM).

The above-mentioned embodiments may be implemented in whole or in part by software, hardware, firmware or other arbitrary combinations. When implemented using software, the above-described embodiments may be implemented in whole or in part in the form of computer program products. The computer program product comprises one or more computer instructions or computer programs. When the computer instruction or computer program is loaded or executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Wired or wireless transmission to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center that includes one or more sets of available media. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media. The semiconductor medium may be a solid state drive.

It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation.

In the several embodiments provided in this application, it should be understood that the disclosed methods, devices and systems can be implemented in other ways. For example, the device embodiments described above are only illustrative; for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation; for example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may be physically included separately, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware, or in the form of hardware plus software functional units.

Although the present application is disclosed as above, the present application is not limited thereto. Any person skilled in the art, without departing from the spirit and scope of the present application, can easily think of changes or replacements, and can make various changes and modifications, including the above-mentioned combinations of different functions and implementation steps, including software and hardware implementations methods are all within the protection scope of the present application.

Claims

A method for determining a paging time window PTW, comprising:

Determine the first PTW according to the terminal identifier and the discontinuous reception eDRX cycle, where the terminal identifier is used to identify the terminal;

According to the time position relationship between the first PTW and the first time period, adjust the first PTW to a second PTW, the second PTW is located in the first time period, and the first time period is the time period during which the satellite used to serve the terminal is located in the serving cell of the terminal.
The method according to claim 1, further comprising:

A paging message is transmitted within the second PTW.
The method according to claim 1 or 2, wherein the first time period is a time period when the satellite serving the terminal is located in the serving cell of the terminal, including:

The first time period includes a first sub-time period and a second sub-time period, the first sub-time period is a time period when a first satellite serving the terminal is located in a serving cell of the terminal, The second sub-time period is a time period during which the second satellite serving the terminal is located in the serving cell of the terminal, and the first satellite is located in the serving cell of the terminal prior to the second satellite Inside.
The method according to claim 3, wherein the second PTW is located within the first time period, comprising:

The second PTW is within the second sub-time period.
The method according to claim 3 or 4, wherein the adjusting the first PTW to the second PTW according to the time position relationship between the first PTW and the first time period includes:

If the first time interval is greater than or equal to the second time interval, or the second time interval is less than the first threshold, adjusting the start time of the first PTW according to the start time of the second sub-time period, To obtain the second PTW, the first time interval is the duration between the start time of the first PTW and the end time of the first sub-time period, and the second time interval is the first The duration between the start moment of the PTW and the start moment of the second sub-time period.
The method according to claim 5, wherein the start moment of the second PTW is the start moment of the second sub-time period.
The method according to claim 5, wherein the starting moment of the second PTW satisfies the following expression:

PTW_start=t1+t3;

or,

PTW_start=t1+t_offset1+t3;

Wherein, PTW_start is the starting moment of the second PTW, t1 is the starting moment of the second sub-time period, and t3 is used to indicate the time shift occurring within the time period of [t1, t2-L], t_offset1 is the transmission delay of the second satellite,

t2 is the end time of the second sub-time period, and L is the window length of the paging time window of the terminal.
The method according to claim 7, wherein the method further comprises:

According to the terminal identifier, the total number of floors (N1/M1) that can be shifted within [t1, t2-L], the unit duration of movement M1, and the time shift t3 is determined, where N1 is the total duration of movement [t1,t2-L].
The method according to claim 8, wherein the time shift t3 satisfies the following expression:

t3=(UE_ID mod(floor(N1/M1)))*M1,

or,

t3=floor((UE_ID mod(N1/M1)))*M1;

Wherein, UE_ID is the terminal identifier, mod() is a modulo function, and floor() is a round-down function.
The method according to claim 3, wherein the second PTW is located within the first time period, comprising:

The second PTW is within the first sub-time period.
The method according to claim 3 or 10, wherein the adjusting the first PTW to the second PTW according to the time position relationship between the first PTW and the first time period includes:

If the first time interval is less than the second threshold, the end time of the first PTW is adjusted according to the end time of the first sub-time period to obtain the second PTW, and the first time interval is the first The duration between the start moment of the PTW and the end moment of the first sub-time period.
The method according to claim 11, wherein the end time of the second PTW is the end time of the first sub-time period.
The method according to claim 11, wherein the end time of the second PTW satisfies the following expression:

PTW_end=t2+t4;

or,

PTW_end=t2+t_offset2+t4;

Wherein, PTW_end is the end time of the second PTW, t2 is the end time of the first sub-time period, t4 is used to indicate the time shift occurring within the time period [t1-L, t2], and t_offset2 is The transmission delay of the first satellite, t1 is the starting moment of the first sub-time period, and L is the window length of the paging time window of the terminal.
The method according to claim 13, further comprising:

According to the terminal identifier, the total number of floors (N2/M2) that can be shifted within [t1-L, t2], and the unit duration of movement M2, determine the time shift t4, where N2 is the total duration that can be moved [t1-L,t2].
The method according to claim 14, wherein the time shift t4 satisfies the following expression:

t4＝(UE_ID mod(floor(N2/M2)))*M2,

or,

t4=floor((UE_ID mod(N2/M2)))*M2;

Wherein, UE_ID is the terminal identifier, mod() is a modulo function, and floor() is a round-down function.
The method according to any one of claims 13 to 15, wherein the starting moment of the second PTW satisfies the following expression:

PTW_start=(PTW_start-L*100+1)mod 1024,

Wherein, PTW_start is the start time of the second PTW.
A communication device, characterized by comprising: a processor and a memory;

The memory is used to store a computer program, and the processor is used to call the computer program, so that the communication device executes the method according to any one of claims 1 to 16.
The communication device according to claim 17, wherein the communication device is a chip, a terminal or a network device.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program, and when the computer program is executed by an electronic device, the method according to any one of claims 1 to 16 is realized.
A chip, characterized in that the chip includes a processor, and the processor executes the steps of the method according to any one of claims 1 to 16.
A chip module, characterized in that the chip module includes a transceiver component and a chip, the chip includes a processor, and the processor executes the steps of the method described in any one of claims 1 to 16.