WO2023015459A1

WO2023015459A1 - Serving cell selection method, and apparatus therefor

Info

Publication number: WO2023015459A1
Application number: PCT/CN2021/111896
Authority: WO
Inventors: 朱亚军
Original assignee: 北京小米移动软件有限公司
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2023-02-16
Also published as: CN115968563A

Abstract

Disclosed in the embodiments of the present application are a serving cell selection method, and an apparatus therefor, which are applicable to non-terrestrial network (NTN) communications, in particular the fields of satellite communications, Internet of Vehicles, etc. The method comprises: determining delay information of candidate serving cells, and selecting a target serving cell according to the delay information of the candidate serving cells. It is ensured that a terminal device can select, on the basis of a service requirement, to access a serving cell that has a relatively short access delay, so as to perform data interaction, thereby shortening a communication delay, and improving the efficiency and reliability of a communication service transmission.

Description

Method and device for selecting a serving cell

technical field

The present application relates to the field of communication technologies, and in particular to a method and device for selecting a serving cell.

Background technique

At present, in some deployment scenarios of satellite communications, such as terminal equipment deployed in ocean scenarios, the terminal equipment needs to establish a communication link with the network equipment through the transit of multiple satellites. In related technologies, a terminal device selects a target serving cell based on signal quality, service time, address location information, etc. of candidate serving cells. The time delay of the selected target serving cell may be relatively large, making it difficult to ensure service transmission efficiency of the terminal device.

Contents of the invention

Embodiments of the present application provide a method and device for selecting a serving cell, which can be applied to non-terrestrial network (NTN) communications, especially satellite communications, Internet of Vehicles, and other fields.

The embodiment of the first aspect of the present application provides a method for selecting a serving cell, the method is executed by a terminal device, and the method includes: determining delay information of a candidate serving cell; and performing Selection of the target serving cell selection process.

The embodiment of the second aspect of the present application provides another method for selecting a serving cell. The method is executed by a network device, and the method includes: receiving delay information of a candidate serving cell sent by a terminal device; The time delay information is used to select the target serving cell.

The embodiment of the third aspect of the present application provides a terminal device. The terminal device includes: a processing unit configured to determine delay information of a candidate serving cell; The time delay information is used to select the target serving cell.

The embodiment of the fourth aspect of the present application provides a network device. The network device includes: a transceiver unit, configured to receive delay information of candidate serving cells sent by a terminal device; and a processing unit, configured to The above delay information is used to select the target serving cell.

The embodiment of the fifth aspect of the present application provides a communication device, the device includes a processor and a memory, a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the device Execute the method described in the embodiment of the first aspect above.

The embodiment of the sixth aspect of the present application provides a communication device, the device includes a processor and a memory, a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the device Execute the method described in the second aspect above.

The embodiment of the seventh aspect of the present application provides a communication device, the device includes a processor and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to make the device Execute the method described in the first aspect above.

The embodiment of the eighth aspect of the present application provides a communication device, the device includes a processor and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to make the device Execute the method described in the second aspect above.

The embodiment of the ninth aspect of the present application provides a computer-readable storage medium for storing instructions, and when the instructions are executed, the method described in the above-mentioned first aspect is implemented.

The embodiment of the tenth aspect of the present application provides a readable storage medium for storing instructions, and when the instructions are executed, the method described in the second aspect above is implemented.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiment of the present application or the background art, the following will describe the drawings that need to be used in the embodiment of the present application or the background art.

FIG. 1 is a schematic flow diagram of a method for selecting a serving cell provided in an embodiment of the present application;

FIG. 2 is a schematic flowchart of a method for selecting a serving cell provided in an embodiment of the present application;

FIG. 3 is a schematic flowchart of a method for selecting a serving cell provided in an embodiment of the present application;

FIG. 4 is a schematic flowchart of a method for selecting a serving cell provided in an embodiment of the present application;

FIG. 5 is a schematic flowchart of a method for selecting a serving cell provided in an embodiment of the present application;

FIG. 6 is a schematic flowchart of a method for selecting a serving cell provided in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a terminal device provided in an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a network device provided by an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a communication device provided by an embodiment of the present application.

Detailed ways

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying 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 do not represent all implementations consistent with the embodiments of the present application. Rather, they are merely examples of apparatus and methods consistent with aspects of the embodiments of the present application as recited in the appended claims.

The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms "a" and "the" used in the embodiments of this application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should 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 embodiments of the present application may use terms such as first, second, and third to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of the embodiments of the present application, first information may also be called second information, and similarly, second information may also be called first information. Depending on the context, the words "if" and "if" as used herein may be interpreted as "at" or "when" or "in response to a determination."

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals designate the same or similar elements throughout. The embodiments described below by referring to the figures are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application.

Please refer to FIG. 1 . FIG. 1 is a schematic flowchart of a method for selecting a serving cell provided in an embodiment of the present application. It should be noted that the method for selecting a serving cell in the embodiment of the present application is performed by a terminal device. As shown in Figure 1, the method may include the following steps:

Step 101, determine delay information of candidate serving cells.

Wherein, the delay information refers to the information of the delay existing in the communication link between the candidate network device and the terminal device in the candidate serving cell.

As a possible implementation manner, the delay information includes the first part of transmission delay.

Wherein, the first part of the transmission delay is the transmission delay from the candidate network device corresponding to the candidate serving cell to the target satellite. It should be noted that the target satellite is the last satellite on the way from the candidate network equipment to the terminal equipment.

As another possible implementation manner, the delay information includes a transmission delay, and the transmission delay is determined according to the first part of the transmission delay and the second part of the transmission delay.

Wherein, the second part of the transmission delay is the transmission delay from the target satellite to the terminal equipment. It should be noted that the target satellite is the last satellite on the way from the candidate network equipment to the terminal equipment.

Step 102: Select a target serving cell according to the delay information of the candidate serving cells.

Optionally, the target serving cell is selected according to the delay information of the candidate serving cells.

In some implementation manners, the delay information of the candidate serving cells is sent to the network device, so that the network device selects the target serving cell according to the delay information of the candidate serving cells.

In some embodiments, the target serving cell is selected according to the delay information of the candidate serving cells and according to preset conditions.

Optionally, the candidate serving cell corresponding to the smallest delay information is selected as the target serving cell.

Optionally, a candidate serving cell whose corresponding delay information is smaller than that of the current serving cell is selected as the target serving cell.

Optionally, select a candidate serving cell whose corresponding delay information is less than the delay information of the current serving cell, and whose absolute value of the difference between the delay information of the candidate serving cell and the delay information of the current serving cell is higher than a preset threshold is selected as the target Serve the community.

It can be understood that different preset conditions can be set according to actual requirements and business applications.

To sum up, by determining the delay information of the candidate serving cells and selecting the target serving cell according to the delay information of the candidate serving cells, it can be ensured that the terminal device can select a serving cell with a smaller access delay based on the service requirements. Perform data interaction, reduce communication delay, and improve the efficiency and reliability of communication service transmission.

Please refer to FIG. 2 . FIG. 2 is a schematic flowchart of a method for selecting a serving cell provided in an embodiment of the present application. It should be noted that the method for selecting a serving cell in the embodiment of the present application is performed by a terminal device. As shown in Figure 2, the method may include the following steps:

In step 201, it is determined that the terminal device is in the process of initially accessing a cell.

Optionally, it may be determined according to the signaling received by the terminal device that the terminal device is in the process of initially accessing the cell.

Step 202, determine delay information of candidate serving cells.

Optionally, determining the first part of the transmission delay of the candidate serving cell may include: receiving notification content sent by the candidate network device, and determining the first part of the transmission delay according to the received notification content.

In some implementations, the content of the notification includes the first portion of the transmission delay.

Optionally, the first part of the transmission delay included in the notification content is a specific delay, such as 200 milliseconds.

In some implementation manners, the notification content includes a delay-related parameter; and the first part of the transmission delay is determined according to the delay-related parameter.

Further, as a first possibility, the delay-related parameters include: the number of satellite hops passed by the candidate network device to the terminal device and the delay per hop. The terminal device can obtain the first part of the transmission delay according to the number of satellite hops received and the delay of each hop.

As a second possibility, the delay-related parameters include: ephemeris information of satellites that the candidate network device passes through to the terminal device. Among them, satellite ephemeris information, including satellite orbit parameters, can accurately calculate, predict, depict, and track the satellite's time, position, speed and other operating states according to the satellite's ephemeris information. The terminal device may determine the first part of the transmission delay according to the received ephemeris information of the satellite.

Optionally, the network device may carry the notification content in at least one of system information, high-layer signaling, and physical layer signaling sent to the terminal device.

Optionally, determining the second part of the transmission delay of the candidate serving cell may include: the terminal device determines the measurement time point based on predefined information or configuration information of the current serving cell; according to the location information of the terminal device at the measurement time point, And measuring the position information of the target satellite at the time point to determine the second part of the transmission delay.

Wherein optionally, the measurement time point is related to the measurement configuration of the candidate serving cell.

Optionally, the predefined information may be at least one of measured time point information and measured time parameters.

Step 203: Select a target serving cell according to the delay information of the candidate serving cells.

As a possible implementation manner, the corresponding candidate serving cell with the smallest transmission delay in the first part is selected as the target serving cell.

As another possible implementation manner, the corresponding candidate serving cell with the smallest transmission delay is selected as the target serving cell.

To sum up, by determining that the terminal device is in the process of initially accessing the cell, the delay information of the candidate serving cell is determined, and the target serving cell is selected according to the delay information of the candidate serving cell. This can ensure that the terminal device can select a service cell with a small access delay based on service requirements, perform data interaction, reduce communication delay, and improve communication service transmission efficiency and reliability.

Please refer to FIG. 3 . FIG. 3 is a schematic flowchart of a method for selecting a serving cell provided in an embodiment of the present application. It should be noted that the method for selecting a serving cell in the embodiment of the present application is performed by a terminal device. As shown in Figure 3, the method may include the following steps:

In step 301, it is determined that the terminal device needs to perform a cell handover procedure.

Optionally, it may be determined that the terminal device needs to perform a cell handover process according to measurement information or channel state information reported by the terminal device.

Step 302, determine delay information of candidate serving cells.

In some embodiments, the delay information includes a transmission delay, and the transmission delay is determined according to the first part of the transmission delay and the second part of the transmission delay.

Optionally, determining the first part of the transmission delay of the candidate serving cell may include: receiving notification content sent by the current network device corresponding to the terminal device, and determining the first part of the transmission delay according to the received notification content.

Wherein, the current network device corresponding to the terminal device refers to the network device corresponding to the serving cell where the terminal device is currently located.

Step 303: Select a target serving cell according to the delay information of the candidate serving cells.

In some implementation manners, the transmission delay of the candidate serving cell is sent to the current network device corresponding to the terminal device, so as to select the target serving cell.

Optionally, the current network device may select the candidate serving cell with the smallest delay as the target serving cell according to the transmission delay of the current serving cell and the transmission delay of the candidate serving cell.

Further, the terminal device receives the instruction information notification sent by the current network device according to the selected target serving cell, performs serving cell handover, and communicates with the target serving cell.

To sum up, by determining that the terminal device needs to perform a cell handover process, the time delay information of the candidate serving cells is determined, and the target serving cell is selected according to the time delay information of the candidate serving cells. This can ensure that the terminal equipment can choose to switch to a service cell with a small delay based on the service requirements, perform data interaction, reduce communication delay, and improve the efficiency and reliability of communication service transmission.

Please refer to FIG. 4 . FIG. 4 is a schematic flowchart of a method for selecting a serving cell provided in an embodiment of the present application. It should be noted that the method for selecting a serving cell in the embodiment of the present application is performed by a terminal device. As shown in Figure 4, the method may include the following steps:

In step 401, it is determined that the terminal device needs to perform a cell reselection process.

Optionally, it may be determined according to signal quality information or channel state information detected by the terminal device that the terminal device determines that a cell reselection process needs to be performed.

Step 402, determine delay information of candidate serving cells.

Step 403, judging whether the cell reselection trigger condition is met, and if so, executing step 404.

Wherein, the cell reselection trigger condition is determined according to the delay information of the serving cell. It can be judged by one rule alone, or multiple rules can be judged at the same time.

In some implementation manners, the trigger condition may be that the delay information of the candidate serving cell is smaller than the delay information of the current serving cell.

In some implementations, the trigger condition may be that the absolute value of the difference between the delay information of the candidate serving cell and the delay information of the current serving cell is greater than a first preset threshold, and the delay information of the candidate serving cell is smaller than that of the current serving cell time delay information. Wherein, the preset threshold may be set as a fixed value, or different thresholds may be set according to different terminal devices, or different thresholds may be set according to different service contents.

In some embodiments, the trigger condition may also be that the absolute value of the difference between the delay information of the candidate serving cell and the delay information of the current serving cell is greater than the first preset threshold, and the delay information of the candidate serving cell is less than the current serving cell. The delay information of the cell, and the delay information of the current serving cell is higher than the second preset threshold.

In some implementations, the trigger condition may also be that the delay information of the candidate serving cell is less than the delay information of the current serving cell, and the delay information of the candidate serving cell is less than a third preset threshold.

Wherein, the second preset threshold and the third preset threshold may also be fixed values, or different thresholds may be set according to different terminal devices, or different thresholds may be set according to different service contents.

It can be understood that other rules and trigger conditions for cell reselection can also be set according to actual requirements and service applications.

It should be noted that other rules may be, for example, the signal quality of the candidate serving cell is greater than the set threshold, the service time length of the current serving cell is less than the set time length, and the relative position relationship between the terminal device and the cell satisfies a preset condition , for example, the terminal device is located at the edge of the current serving cell, and any one or more of them.

It should also be noted that if the trigger condition for cell reselection is not met, cell reselection will not be performed, and the terminal device is still in the current serving cell.

Step 404: Select a target serving cell according to the delay information of the candidate serving cells.

Optionally, select the corresponding candidate serving cell with the smallest transmission delay as the target serving cell.

In summary, by determining that the terminal device needs to perform the cell reselection process, determine the delay information of the candidate serving cell, and judge whether the cell reselection trigger condition is met, and if so, select the target serving cell according to the delay information of the candidate serving cell . This can ensure that the terminal device can reselect a service cell with a smaller access delay based on the service requirements, perform data interaction, reduce communication delay, improve the efficiency and reliability of communication service transmission, and set the trigger condition for cell reselection. Improve transmission reliability and save communication resources.

Please refer to FIG. 5 . FIG. 5 is a schematic flowchart of a method for selecting a serving cell provided in an embodiment of the present application. It should be noted that the method for selecting a serving cell in the embodiment of the present application is performed by a network device. As shown in Figure 5, the method may include the following steps:

Step 501, receiving delay information of candidate serving cells sent by a terminal device.

Optionally, the delay information includes a transmission delay, and the transmission delay is determined according to the first part of the transmission delay and the second part of the transmission delay.

Wherein, the first part of the transmission delay is the transmission delay from the candidate network device corresponding to the candidate serving cell to the target satellite. The second part of the transmission delay is the transmission delay from the target satellite to the terminal equipment. Wherein, the target satellite is the last satellite on the way from the candidate network equipment to the terminal equipment.

Step 502: Select a target serving cell according to the delay information of the candidate serving cell.

Optionally, the target serving cell is selected according to the received delay information of the candidate serving cells.

In some embodiments, the target serving cell is selected according to the delay information of the candidate cells and according to preset conditions.

Optionally, a candidate serving cell whose corresponding delay information is smaller than the delay information of the current serving cell is selected as the target serving cell.

Optionally, a candidate serving cell whose corresponding delay information is smaller than that of the current serving cell and whose absolute value of the delay information difference is higher than a preset threshold is selected as the target serving cell.

To sum up, by receiving the delay information of the candidate serving cell sent by the terminal device, and selecting the target serving cell according to the delay information of the candidate serving cell, it can be ensured that the terminal device can select the access The service cell with a small delay performs data interaction, reduces communication delay, and improves the efficiency and reliability of communication service transmission.

Please refer to FIG. 6 . FIG. 6 is a schematic flowchart of a method for selecting a serving cell provided in an embodiment of the present application. It should be noted that the method for selecting a serving cell in the embodiment of the present application is performed by a network device. As shown in Figure 6, the method may include the following steps:

Step 601, sending notification content to the terminal device.

In some implementations, the notification content includes the first part of the transmission delay of the candidate serving cell.

In some implementations, the notification content includes delay-related parameters of the candidate serving cell; where the delay-related parameters are used to determine the first part of transmission delay.

Step 602, receiving delay information of candidate serving cells sent by the terminal device.

Step 603 , according to the transmission delay of the current serving cell of the terminal device and the transmission delay of the candidate serving cell, determine whether the cell switching condition is met, and if so, execute step 604 .

In some implementation manners, the switching condition may be that the delay information of the candidate serving cell is smaller than the delay information of the current serving cell.

In some implementations, the switching condition may be that the absolute value of the difference between the delay information of the candidate serving cell and the delay information of the current serving cell is greater than the fourth preset threshold, and the delay information of the candidate serving cell is less than the current serving cell time delay information. Wherein, the preset threshold may be set as a fixed value, or different thresholds may be set according to different terminal devices, or different thresholds may be set according to different service contents.

In some implementation manners, the switching condition may also be that the delay information of the candidate serving cell is smaller than the delay information of the current serving cell, and the delay information of the current serving cell is higher than the fifth preset threshold.

In some implementations, the switching condition may also be that the absolute value of the difference between the delay information of the candidate serving cell and the delay information of the current serving cell is greater than the fourth preset threshold, and the delay information of the candidate serving cell is less than the current serving cell. The delay information of the cell, and the delay information of the candidate serving cell is less than the sixth preset threshold.

Wherein, the fifth preset threshold and the sixth preset threshold may also be fixed values, or different thresholds may be set according to different terminal devices, or different thresholds may be set according to different service contents.

It can be understood that other rules and cell switching conditions can also be set according to actual needs and service applications.

It should also be noted that, if the cell switching condition is not satisfied, the cell switching will not be performed, and the terminal device is still in the current serving cell.

Step 604: Select a target serving cell according to the delay information of the candidate serving cell.

Optionally, selecting a corresponding candidate serving cell with the smallest transmission delay as the target serving cell.

Further, the network device sends an instruction information notification to the terminal device according to the selected target serving cell, so that the terminal device executes serving cell handover and establishes a communication connection with the target serving cell.

In summary, by sending the notification content to the terminal device, receiving the delay information of the candidate serving cell sent by the terminal device, according to the transmission delay of the current serving cell of the terminal device and the transmission delay of the candidate serving cell, determine whether the cell handover condition is met , if yes, select a target serving cell according to the delay information of the candidate serving cell. In this way, it can be ensured that the terminal device can reselect a service cell with a smaller access delay based on service requirements, perform data interaction, reduce communication delay, and improve communication service transmission efficiency and reliability.

Corresponding to the serving cell selection method provided by the above several embodiments, the present application also provides a terminal device and a network device. Correspondingly, therefore, the implementation of the serving cell selection method is also applicable to the terminal device and the network device provided in the following embodiments, and will not be described in detail in the following embodiments.

Please refer to FIG. 7, which is a schematic structural diagram of a terminal device provided in an embodiment of the present application.

As shown in FIG. 7, the terminal device 700 includes: a processing unit 710, wherein:

A processing unit 710, configured to determine delay information of candidate serving cells;

The processing unit 710 is further configured to select a target serving cell according to the delay information of the candidate serving cell.

As an implementation of the embodiment of the present application, the delay information includes a first part of transmission delay; or, the delay information includes a transmission delay, and the transmission delay is based on the first part of transmission delay and the first part of transmission delay. Two parts of the transmission delay are determined; the first part of the transmission delay is the transmission delay from the candidate network device corresponding to the candidate serving cell to the target satellite; the second part of the transmission delay is the transmission delay from the target satellite to the target satellite. The transmission delay of the terminal device; wherein, the target satellite is the last satellite on the way from the candidate network device to the terminal device.

As an implementation manner of the embodiment of the present application, the terminal device further includes: a transceiver unit configured to receive notification content sent by the candidate network device, where the notification content includes the first part of the transmission delay; or , for receiving notification content sent by the candidate network device, where the notification content includes a delay-related parameter; and determining the first part of the transmission delay according to the delay-related parameter.

As an implementation manner of the embodiment of the present application, the notification content is carried in the system information sent by the candidate network device.

As an implementation of the embodiment of the present application, the terminal device further includes: a transceiver unit configured to receive notification content sent by the current network device corresponding to the terminal device, wherein the notification content includes the candidate serving cell The first part of the transmission delay; or, used to receive the notification content sent by the current network device corresponding to the terminal device, wherein the notification content includes delay-related parameters of the candidate serving cell; according to the time delay A delay-related parameter determines the first part of the transmission delay of the candidate serving cell.

As an implementation manner of the embodiment of the present application, the notification content is carried in at least one of the following: system information, high-layer signaling, and physical layer signaling.

As an implementation of the embodiment of the present application, the delay-related parameters include: the number of satellite hops from the candidate network device to the terminal device and the delay per hop; or, the delay-related parameters include: the The ephemeris information of the satellites that the candidate network device passes through to the terminal device.

As an implementation of the embodiment of the present application, the processing unit 710 is specifically configured to: the terminal device determines the measurement time point based on predefined information or the configuration information of the current serving cell; according to the position of the terminal device at the measurement time point information, and the position information of the target satellite at the measurement time point to determine the second part of the transmission delay.

As an implementation manner of the embodiment of the present application, the processing unit 710 is specifically configured to: in response to the terminal device being in the process of initially accessing a cell, select the corresponding candidate serving cell with the smallest transmission delay in the first part as the target serving cell ; or, in response to the terminal device being in the process of initially accessing a cell, selecting a corresponding candidate serving cell with the smallest transmission delay as the target serving cell.

As an implementation of the embodiment of the present application, the processing unit 710 is specifically configured to: in response to the terminal device being in the cell switching process, send the transmission delay of the candidate serving cell to the current network device corresponding to the terminal device , to select the target serving cell; wherein, the current network device is a network device corresponding to the current serving cell of the terminal device.

As an implementation of the embodiment of the present application, the processing unit 710 is specifically configured to: in response to the terminal device being in the cell reselection process, according to the transmission delay of the current serving cell of the terminal device and the transmission delay of the candidate serving cell transmission delay, determining whether a cell reselection trigger condition is satisfied; in response to satisfying the cell reselection trigger condition, selecting a corresponding candidate serving cell with the smallest transmission delay as the target serving cell.

The terminal device in this embodiment can select the target serving cell according to the delay information of the candidate serving cell by determining the delay information of the candidate serving cell, which can ensure that the terminal device can select the access delay based on the service requirement. The small serving cell performs data interaction, reduces communication delay, and improves the efficiency and reliability of communication service transmission.

Please refer to FIG. 8 , which is a schematic structural diagram of a network device provided by an embodiment of the present application.

As shown in FIG. 8, the network device 800 includes: a transceiver unit 810 and a processing unit 820, wherein:

A transceiver unit 810, configured to receive delay information of candidate serving cells sent by the terminal device;

The processing unit 820 is configured to select a target serving cell according to the delay information of the candidate serving cell.

As an implementation of the embodiment of the present application, the delay information includes a transmission delay, and the transmission delay is determined according to the first part of the transmission delay and the second part of the transmission delay; the first part of the transmission delay is, the The transmission delay from the candidate network device corresponding to the candidate serving cell to the target satellite; the second part of the transmission delay is the transmission delay from the target satellite to the terminal device; wherein, the target satellite is the candidate The last satellite on the way from the network equipment to the terminal equipment.

As an implementation manner of the embodiment of the present application, the transceiver unit 810 is further configured to: send notification content to the terminal device, where the notification content includes the first part of the transmission delay of the candidate serving cell; or, Sending notification content to the terminal device, where the notification content includes delay-related parameters of the candidate serving cell, which are used to determine the first partial transmission delay.

As an implementation of the embodiment of the present application, the processing unit 820 is specifically configured to: determine whether the cell switching condition is satisfied according to the transmission delay of the current serving cell of the terminal device and the transmission delay of the candidate serving cell; Selecting the corresponding candidate serving cell with the smallest transmission delay as the target serving cell when the cell switching condition is met.

The network device in this embodiment can receive the delay information of the candidate serving cell sent by the terminal device, and select the target serving cell according to the delay information of the candidate serving cell, so as to ensure that the terminal device can According to the demand, select a service cell with a small access delay to perform data interaction, reduce communication delay, and improve the efficiency and reliability of communication service transmission.

In order to realize the above-mentioned embodiments, the embodiment of the present application also proposes a communication device, including: a processor and a memory, a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the device executes the The method shown in Fig. 4 embodiment.

In order to realize the above-mentioned embodiments, the embodiment of the present application also proposes a communication device, including: a processor and a memory, a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the device executes the The method shown in the embodiment of Fig. 6 .

In order to realize the above embodiments, the embodiment of the present application also proposes a communication device, including: a processor and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to Execute the methods shown in the embodiments shown in FIG. 1 to FIG. 4 .

In order to achieve the above embodiments, the embodiment of the present application also proposes a communication device, including: a processor and an interface circuit, the interface circuit is used to receive code instructions and transmit them to the processor, and the processor is used to run the code instructions to Execute the methods shown in the embodiments shown in FIG. 5 to FIG. 6 .

In order to implement the above-mentioned embodiments, the embodiments of the present application further propose a computer-readable storage medium for storing instructions, and when the instructions are executed, the methods shown in the embodiments shown in FIG. 1 to FIG. 4 are implemented.

In order to implement the above embodiments, the embodiments of the present application further propose a computer-readable storage medium for storing instructions, and when the instructions are executed, the methods shown in the embodiments shown in FIG. 5 to FIG. 6 are implemented.

In order to realize the above-mentioned embodiments, the present application also proposes a computer program product, which, when running on a computer, causes the computer to execute the methods shown in the embodiments shown in FIG. 1 to FIG. 4 of the present application.

In order to realize the above-mentioned embodiments, the present application also proposes a computer program product, which, when running on a computer, causes the computer to execute the methods shown in the embodiments shown in FIG. 5 to FIG. 6 of the present application.

FIG. 9 is a block diagram of a communication device 900 provided by an embodiment of the present application. For example, communication device 900 may be a mobile phone, computer, digital broadcast user equipment, messaging device, game console, tablet device, medical device, fitness device, personal digital assistant, and the like.

Referring to FIG. 9, a communication device 900 may include at least one of the following components: a processing component 902, a memory 904, a power supply component 906, a multimedia component 908, an audio component 910, an input/output (I/O) interface 912, a sensor component 914, and communication component 916 .

The processing component 902 generally controls the overall operations of the communication device 900, such as those associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 902 may include at least one processor 920 to execute instructions to complete all or part of the steps of the above-mentioned method. Additionally, processing component 902 can include at least one module to facilitate interaction between processing component 902 and other components. For example, processing component 902 may include a multimedia module to facilitate interaction between multimedia component 908 and processing component 902 .

The memory 904 is configured to store various types of data to support operations at the communication device 900 . Examples of such data include instructions for any application or method operating on the communication device 900, contact data, phonebook data, messages, pictures, videos, and the like. The memory 904 can be implemented by any type of volatile or non-volatile memory device or their combination, 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.

The power supply component 906 provides power to various components of the communication device 900 . Power component 906 may include a power management system, at least one power supply, and other components associated with generating, managing, and distributing power for communication device 900 .

The multimedia component 908 includes a screen providing an output interface between the communication device 900 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 at least one touch sensor to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense a boundary of a touch or slide action, but also detect a wake-up time and pressure related to the touch or slide operation. In some embodiments, multimedia component 908 includes a front camera and/or rear camera. When the 900 is in an operating mode, such as shooting mode or video mode, the front camera and/or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have focal length and optical zoom capability.

The audio component 910 is configured to output and/or input audio signals. For example, the audio component 910 includes a microphone (MIC), which is configured to receive an external audio signal when the communication device 900 is in an operation mode, such as a call mode, a recording mode, and a speech recognition mode. Received audio signals may be further stored in memory 904 or sent via communication component 916 . In some embodiments, the audio component 910 also includes a speaker for outputting audio signals.

The I/O interface 912 provides an interface between the processing component 902 and a peripheral interface module. The peripheral interface module may be a keyboard, a click wheel, a button, and the like. These buttons may include, but are not limited to: a home button, volume buttons, start button, and lock button.

Sensor assembly 914 includes at least one sensor for providing communication device 900 with status assessments of various aspects. For example, the sensor component 914 can detect the open/closed state of the communication device 900, the relative positioning of components, such as the display and the keypad of the communication device 900, the sensor component 914 can also detect the communication device 900 or a communication device 900 Changes in position of components, presence or absence of user contact with communication device 900 , communication device 900 orientation or acceleration/deceleration and temperature changes of communication device 900 . Sensor assembly 914 may include a proximity sensor configured to detect the presence of nearby objects in the absence of any physical contact. Sensor assembly 914 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor component 914 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor or a temperature sensor.

The communication component 916 is configured to facilitate wired or wireless communication between the communication device 900 and other devices. The communication device 900 can access a wireless network based on communication standards, such as WiFi, 2G or 3G, or a combination thereof. In one exemplary embodiment, the communication component 916 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 916 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 Wide Band (UWB) technology, Bluetooth (BT) technology and other technologies.

In an exemplary embodiment, the communication device 900 may be implemented by at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate An array (FPGA), a controller, a microcontroller, a microprocessor or other electronic components are used to implement the method in any of the above embodiments.

In an exemplary embodiment, there is also provided a non-transitory computer-readable storage medium including instructions, such as the memory 904 including instructions, which can be executed by the processor 920 of the communication device 900 to implement 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.

Other embodiments of the present application will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present invention, these modifications, uses or adaptations follow the general principles of the present invention and include common knowledge or conventional technical means in the technical field not disclosed in this application . The specification and examples are to be considered exemplary only, with a true scope and spirit of the application indicated by the following claims.

It should be understood that the present application is not limited to the precise constructions which have been described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

In order to realize the above embodiments, the embodiment of the present application also provides a communication device, the communication device may be a network device, or a terminal device, or a chip, a chip system, or a processor that supports the network device to implement the above method. , may also be a chip, a chip system, or a processor that supports the terminal device to implement the above method. The device can be used to implement the method described in any of the above method embodiments, and for details, refer to the description in the above method embodiments.

Wherein, the communication device may include one or more processors. The processor may be a general purpose processor or a special purpose processor or the like. For example, it can be a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control communication devices (such as base stations, baseband chips, terminal equipment, terminal equipment chips, DU or CU, etc.) and execute computer programs , to process data for computer programs.

Optionally, the communication device may further include one or more memories, on which computer programs may be stored, and the processor executes the computer programs, so that the communication device executes the methods described in the foregoing method embodiments. Optionally, data may also be stored in the memory. The communication device and the memory can be set separately or integrated together.

Optionally, the communication device may further include a transceiver and an antenna. The transceiver may be referred to as a transceiver unit, a transceiver, or a transceiver circuit, etc., and is used to implement a transceiver function. The transceiver may include a receiver and a transmitter, and the receiver may be called a receiver or a receiving circuit for realizing a receiving function; the transmitter may be called a transmitter or a sending circuit for realizing a sending function.

Optionally, the communication device may further include one or more interface circuits. The interface circuit is used to receive code instructions and transmit them to the processor. The processor executes the code instructions to enable the communication device to execute the method described in any of the foregoing method embodiments.

In one implementation, the processor may include a transceiver for implementing receiving and transmitting functions. For example, the transceiver may be a transceiver circuit, or an interface, or an interface circuit. The transceiver circuits, interfaces or interface circuits for realizing the functions of receiving and sending can be separated or integrated together. The above-mentioned transceiver circuit, interface or interface circuit may be used for reading and writing code/data, or the above-mentioned transceiver circuit, interface or interface circuit may be used for signal transmission or transfer.

In an implementation manner, the processor may store a computer program, and the computer program runs on the processor to enable the communication device to execute the method described in any one of the above method embodiments. A computer program may be embedded in a processor, in which case the processor may be implemented by hardware.

In an implementation manner, the communication device may include a circuit, and the circuit may implement the function of sending or receiving or communicating in the foregoing method embodiments. The processors and transceivers described in this application can be implemented in integrated circuits (integrated circuits, ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed-signal ICs, application specific integrated circuits (ASICs), printed circuit boards ( printed circuit board, PCB), electronic equipment, etc. The processor and transceiver can also be fabricated using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), nMetal-oxide-semiconductor (NMOS), P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (bipolar junction transistor, BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

The communication device described in the above embodiments may be a network device or a terminal device, but the scope of the communication device described in this application is not limited thereto, and the structure of the communication device may not be limited by FIG. 9 . A communication device may be a stand-alone device or may be part of a larger device. For example the communication device may be:

(1) Stand-alone integrated circuits ICs, or chips, or chip systems or subsystems;

(2) A set of one or more ICs, optionally, the set of ICs may also include storage components for storing data and computer programs;

(3) ASIC, such as modem (Modem);

(4) Modules that can be embedded in other devices;

(5) Receivers, terminal equipment, intelligent terminal equipment, cellular phones, wireless equipment, handsets, mobile units, vehicle equipment, network equipment, cloud equipment, artificial intelligence equipment, etc.;

(6) Others and so on.

For the case where the communications device may be a chip or system-on-a-chip, the chip may include a processor and an interface. Wherein, the number of processors may be one or more, and the number of interfaces may be more than one.

Optionally, the chip also includes a memory, which is used to store necessary computer programs and data.

Those skilled in the art can also understand that various illustrative logical blocks and steps listed in the embodiments of the present application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functions are implemented by hardware or software depends on the specific application and overall system design requirements. Those skilled in the art may use various methods to implement the described functions for each specific application, but such implementation should not be understood as exceeding the protection scope of the embodiments of the present application.

Other embodiments of the invention will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present invention, these modifications, uses or adaptations follow the general principles of the present invention and include common knowledge or conventional technical means in the technical field not disclosed in this application . The specification and examples are to be considered exemplary only, with a true scope and spirit of the application indicated by the following claims.

It should be understood that steps may be reordered, added or deleted using the various forms of flow shown above. For example, the steps described in the embodiments of the present application may be executed in parallel, sequentially, or in a different order, as long as the desired result of the technical solution disclosed in the present invention can be achieved, no limitation is imposed herein.

The above specific implementation methods do not constitute a limitation to the protection scope of the present invention. It should be apparent to those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made depending on design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

A method for selecting a serving cell, characterized in that the method is executed by a terminal device, and the method includes:

Determining delay information of candidate serving cells;

Selecting a target serving cell according to the delay information of the candidate serving cell.
The method according to claim 1, wherein the delay information includes a first part of transmission delay; or, the delay information includes a transmission delay, and the transmission delay is based on the first part of the transmission delay and the second part of transmission delay determination;

The first part of the transmission delay is the transmission delay from the candidate network device corresponding to the candidate serving cell to the target satellite; the second part of the transmission delay is the transmission delay from the target satellite to the terminal device ; Wherein, the target satellite is the last satellite on the way from the candidate network device to the terminal device.
The method according to claim 2, wherein the terminal device is in the process of initially accessing the cell, and determining the first part of the transmission delay includes:

receiving notification content sent by the candidate network device, where the notification content includes the first part of the transmission delay;

or,

receiving notification content sent by the candidate network device, where the notification content includes a delay-related parameter; and determining the first partial transmission delay according to the delay-related parameter.
The method according to claim 3, wherein the notification content is carried in the system information sent by the candidate network device.
The method according to claim 2, wherein the terminal device is in a cell handover process or a cell reselection process, and determining the first part of the transmission delay includes:

Receive notification content sent by the current network device corresponding to the terminal device, where the notification content includes the first part of the transmission delay of the candidate serving cell;

Or, receiving the notification content sent by the current network device corresponding to the terminal device, where the notification content includes delay-related parameters of the candidate serving cell; determining the delay-related parameters of the candidate serving cell according to the delay-related parameters The first part of the transmission delay.
The method according to claim 5, wherein the notification content is carried in at least one of the following: system information, high-layer signaling, and physical layer signaling.
The method according to claim 3 or 5, wherein the delay-related parameters include: the number of satellite hops from the candidate network device to the terminal device and the delay per hop;

or,

The delay-related parameters include: ephemeris information of satellites passed by the candidate network device to the terminal device.
The method according to claim 2, wherein determining the second part of the transmission delay comprises:

The terminal device determines the measurement time point based on predefined information or configuration information of the current serving cell;

The second part of the transmission delay is determined according to the position information of the terminal device at the measurement time point and the position information of the target satellite at the measurement time point.
The method according to claim 2, wherein the selection of the target serving cell according to the delay information of the candidate serving cell comprises:

In response to the terminal device being in the process of initially accessing a cell, selecting a corresponding candidate serving cell with the smallest transmission delay in the first part as the target serving cell;

or,

In response to the terminal device being in the process of initially accessing a cell, selecting a corresponding candidate serving cell with the smallest transmission delay as the target serving cell.
The method according to claim 2, wherein the selection of the target serving cell according to the delay information of the candidate serving cell comprises:

In response to the terminal device being in a cell switching process, sending the transmission delay of the candidate serving cell to the current network device corresponding to the terminal device to select the target serving cell; wherein the current network device is the The network device corresponding to the current serving cell of the terminal device.
The method according to claim 2, wherein the selection of the target serving cell according to the delay information of the candidate serving cell comprises:

In response to the terminal device being in a cell reselection process, determine whether a cell reselection trigger condition is met according to the transmission delay of the current serving cell of the terminal device and the transmission delay of the candidate serving cell;

In response to satisfying the cell reselection trigger condition, selecting a corresponding candidate serving cell with the smallest transmission delay as the target serving cell.
A method for selecting a serving cell, characterized in that the method is performed by a network device, and the method includes:

receiving the delay information of the candidate serving cell sent by the terminal device;

Selecting a target serving cell according to the delay information of the candidate serving cell.
The method according to claim 12, wherein the delay information includes a transmission delay, and the transmission delay is determined according to the first part of the transmission delay and the second part of the transmission delay;

The first part of the transmission delay is the transmission delay from the candidate network device corresponding to the candidate serving cell to the target satellite; the second part of the transmission delay is the transmission delay from the target satellite to the terminal device ; Wherein, the target satellite is the last satellite on the way from the candidate network device to the terminal device.
The method according to claim 13, characterized in that before receiving the delay information of the candidate serving cell sent by the terminal device, further comprising:

sending notification content to the terminal device, where the notification content includes the first part of the transmission delay of the candidate serving cell;

or,

Sending notification content to the terminal device, where the notification content includes delay-related parameters of the candidate serving cell, which are used to determine the first partial transmission delay.
The method according to claim 14, wherein the notification content is carried in at least one of the following: system information, high-layer signaling, and physical layer signaling.
The method according to claim 14, wherein the delay-related parameters include: the number of satellite hops from the candidate network device to the terminal device and the delay per hop;

or,

The delay-related parameters include: ephemeris information of satellites that the candidate network device passes through to the terminal device.
The method according to claim 13, wherein the selection of the target serving cell according to the delay information of the candidate serving cell comprises:

determining whether a cell switching condition is met according to the transmission delay of the current serving cell of the terminal device and the transmission delay of the candidate serving cell;

In response to satisfying the cell switching condition, selecting a corresponding candidate serving cell with the smallest transmission delay as the target serving cell.
A terminal device, characterized in that the terminal device includes:

a processing unit, configured to determine delay information of candidate serving cells;

The processing unit is further configured to select a target serving cell according to the delay information of the candidate serving cell.
The terminal device according to claim 18, wherein the delay information includes a first part of transmission delay; or, the delay information includes a transmission delay, and the transmission delay is based on the first part of transmission time Delay and the second part of the transmission delay are determined;

The first part of the transmission delay is the transmission delay from the candidate network device corresponding to the candidate serving cell to the target satellite; the second part of the transmission delay is the transmission delay from the target satellite to the terminal device ; Wherein, the target satellite is the last satellite on the way from the candidate network device to the terminal device.
The terminal device according to claim 19, wherein the terminal device is in the initial cell access process, and the terminal device further comprises:

A transceiver unit, configured to receive notification content sent by the candidate network device, wherein the notification content includes the first part of the transmission delay;

or,

The method is configured to receive notification content sent by the candidate network device, where the notification content includes a delay-related parameter; and determine the first partial transmission delay according to the delay-related parameter.
The terminal device according to claim 19, wherein the terminal device is in a cell switching process or a cell reselection process, and the terminal device further comprises:

A transceiver unit, configured to receive notification content sent by the current network device corresponding to the terminal device, wherein the notification content includes the first part of the transmission delay of the candidate serving cell;

Or, it is used to receive the notification content sent by the current network device corresponding to the terminal device, where the notification content includes delay-related parameters of the candidate serving cell; determine the candidate serving cell according to the delay-related parameters The first part of the transmission delay.
The terminal device according to claim 19, wherein the processing unit is specifically configured to:

Determine the measurement time point based on predefined information or configuration information of the current serving cell;

The second part of the transmission delay is determined according to the position information of the terminal device at the measurement time point and the position information of the target satellite at the measurement time point.
The terminal device according to claim 19, wherein the processing unit is specifically configured to:

In response to the terminal device being in the process of initially accessing a cell, selecting a corresponding candidate serving cell with the smallest transmission delay in the first part as the target serving cell;

or,

In response to the terminal device being in the process of initially accessing a cell, selecting a corresponding candidate serving cell with the smallest transmission delay as the target serving cell.
The terminal device according to claim 19, wherein the processing unit is specifically configured to:

In response to the terminal device being in a cell switching process, sending the transmission delay of the candidate serving cell to the current network device corresponding to the terminal device to select the target serving cell; wherein the current network device is the The network device corresponding to the current serving cell of the terminal device.
The terminal device according to claim 19, wherein the processing unit is specifically configured to:

In response to the terminal device being in a cell reselection process, determine whether a cell reselection trigger condition is met according to the transmission delay of the current serving cell of the terminal device and the transmission delay of the candidate serving cell;

In response to satisfying the cell reselection trigger condition, selecting a corresponding candidate serving cell with the smallest transmission delay as the target serving cell.
A network device, characterized in that the network device includes:

a transceiver unit, configured to receive the delay information of the candidate serving cell sent by the terminal device;

A processing unit, configured to select a target serving cell according to the delay information of the candidate serving cell.
The network device according to claim 26, wherein the delay information includes a transmission delay, and the transmission delay is determined according to the first part of the transmission delay and the second part of the transmission delay;

The first part of the transmission delay is the transmission delay from the candidate network device corresponding to the candidate serving cell to the target satellite; the second part of the transmission delay is the transmission delay from the target satellite to the terminal device ; Wherein, the target satellite is the last satellite on the way from the candidate network device to the terminal device.
The network device according to claim 27, wherein the transceiver unit is also used for:

sending notification content to the terminal device, where the notification content includes the first part of the transmission delay of the candidate serving cell;

or,

Sending notification content to the terminal device, where the notification content includes delay-related parameters of the candidate serving cell, which are used to determine the first partial transmission delay.
The network device according to claim 27, wherein the processing unit is specifically configured to:

determining whether a cell switching condition is met according to the transmission delay of the current serving cell of the terminal device and the transmission delay of the candidate serving cell;

In response to satisfying the cell switching condition, selecting a corresponding candidate serving cell with the smallest transmission delay as the target serving cell.
A communication device, characterized in that the device includes a processor and a memory, and a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the device performs the The method described in any one of 1 to 11.
A communication device, characterized in that the device includes a processor and a memory, and a computer program is stored in the memory, and the processor executes the computer program stored in the memory, so that the device performs the The method described in any one of 12 to 17.
A communication device, characterized by comprising: a processor and an interface circuit;

The interface circuit is used to receive code instructions and transmit them to the processor;

The processor is configured to run the code instructions to execute the method according to any one of claims 1-11.
A communication device, characterized by comprising: a processor and an interface circuit;

The interface circuit is used to receive code instructions and transmit them to the processor;

The processor is configured to run the code instructions to execute the method according to any one of claims 12-17.
A computer-readable storage medium for storing instructions, when the instructions are executed, the method according to any one of claims 1 to 11 is implemented.
A computer-readable storage medium for storing instructions, which, when executed, cause the method according to any one of claims 12 to 17 to be implemented.