WO2021051364A1

WO2021051364A1 - Communication method, apparatus and device

Info

Publication number: WO2021051364A1
Application number: PCT/CN2019/106811
Authority: WO
Inventors: 谢信乾; 郭志恒; 费永强; 毕文平
Original assignee: 华为技术有限公司
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2021-03-25
Also published as: CN113826436A

Abstract

The present application relates to a communication method, apparatus and device. A random access preamble is sent to a network device in a first time unit. A start moment of a time window is determined according to RSRP, and a random access response in response to the random access preamble starts to be detected at the start moment. The start moment of the time window is located after an end moment of the first time unit in a time domain. In embodiments of the present application, a terminal device on a cell edge may delay receiving again a random access response for a period of time, because a network device may also for a period of time delay sending the random access response to the terminal device on the cell edge. Therefore, the success rate of receiving the random access response may be increased when the terminal device delays receiving the random access response.

Description

Communication method, device and equipment

Technical field

This application relates to the field of mobile communication technology, and in particular to a communication method, device and equipment.

Background technique

For cellular wireless communication networks such as the 5th generation (5G) new radio interface (NR) or long term evolution (LTE) of the fifth generation mobile communication technology (5th generation, 5G), the method of adding intermediate nodes can be used to improve the edge of the cell This type of intermediate node is usually called a relay. For example, if the terminal device is located at the edge of a cell, the distance between the terminal device and the network device is relatively long, and the network device may not receive the uplink signal sent by the terminal device. In this case, the uplink communication of the terminal device can be forwarded through the relay, that is, the terminal device first sends the uplink signal to the relay, and then the relay forwards the received uplink signal to the network device, so that the network device can receive the uplink signal from the network device. The signal of the terminal device. But for the downlink communication, the terminal device can directly receive from the network device, and there is no need to forward it through a relay.

When the terminal device performs random access, it first sends a random access preamble to the network device. After receiving the random access preamble, the network device sends a random access response (RAR) to the terminal device. On the one hand, after the terminal device completes the transmission of the random access preamble, it will try to detect the RAR for a period of time thereafter, and this period of time is usually referred to as the RAR receiving window (RAR window). The starting time of the RAR receiving window is predefined by the protocol.

But for the relay scenario, the random access preamble sent by the terminal device at the cell edge will be forwarded to the network device through the relay, which makes the time for the random access preamble to reach the network device compared to the terminal device in the non-relay scenario The random access preamble sent will have a larger delay, so the time resource where the RAR sent by the network device is located will also have a larger delay compared to the non-relay scenario, and the delay may exceed The length of the RAR receiving window. If the configuration method of the RAR receiving window as described above is still used, the terminal device will not be able to receive the RAR.

Summary of the invention

The embodiments of the present application provide a communication method, device, and equipment, which are used to improve the success rate of terminal equipment receiving RAR.

In a first aspect, a first communication method is provided. The method includes: sending a random access preamble to a network device in a first time unit; and determining a start time of a time window according to RSRP, wherein the start time of the time window is It is located after the end time of the first time unit in the time domain; and, starting to detect a random access response in response to the random access preamble at the start time.

Alternatively, the communication method of the first aspect includes: sending a random access preamble to the network device in a first time unit; and starting to detect a random access response in response to the random access preamble at the beginning of the time window, wherein The start time of the time window is determined according to RSRP, and the start time of the time window is located after the end time of the first time unit in the time domain.

The method may be executed by a first communication device, and the first communication device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip system. Exemplarily, the first communication device is a terminal device, or a chip system set in the terminal device for realizing the function of the terminal device, or other component used for realizing the function of the terminal device. In the following introduction process, it is taken as an example that the first communication device is a terminal device.

In the embodiment of this application, the terminal device can determine the start time of the time window for the terminal device to receive the random access response according to the RSRP. In this way, the terminal device at the edge of the cell and the terminal device at the center of the cell have different RSRPs. The start time of the time window for receiving the random access response corresponding to the terminal equipment in different locations may be different. For example, the start time of the time window determined by the terminal equipment at the edge of the cell may be later than the start time of the time window for receiving the random access response determined by the terminal equipment at the cell center. For the terminal equipment at the cell edge, the terminal equipment at the cell edge can delay receiving the random access response for a period of time, because the network equipment may also be delayed for a period of time when sending the random access response to the terminal equipment at the cell edge. The device delays receiving the random access response, which can improve the success rate of receiving the random access response.

Optionally, when the RSRP is greater than or equal to the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit is equal to a first value; or, when the RSRP is less than the RSRP In the case of a threshold value, the time difference between the start time of the time window and the end time of the first time unit is equal to the sum of the first value and the offset value. Wherein, the first value and the offset value are both greater than zero.

Or, optionally, when the RSRP is greater than or equal to the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit is equal to a first value; or, in the RSRP If it is less than the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit is equal to a fourth value. Wherein, the first value and the fourth value are both greater than zero.

The RSRP is greater than or equal to the RSRP threshold, which indicates that the terminal device may be located in the center of the cell, or not located at the edge of the cell. In this case, the terminal device may not send the uplink signal to the network device through the relay, but directly send it. Therefore, the network device may send the random access response to the terminal device earlier. Therefore, if the The RSRP is greater than or equal to the RSRP threshold, and the time difference between the start time of the time window determined by the terminal device and the end time of the first time unit is equal to the first value.

If the RSRP is less than the RSRP threshold, the terminal device may be at the edge of the cell. In this case, the terminal device may send the uplink signal to the network device through a relay, and the time for the network device to send the random access response to such a terminal device may be relatively late. Therefore, if the RSRP is less than the RSRP threshold, the time difference between the start time of the time window determined by the terminal device and the end time of the first time unit may be equal to the sum of the first value and the offset value, or the time difference may be equal to the first value. Four values, for example, the fourth value is greater than the first value. Compared with a terminal device that does not use a relay to send an uplink signal, a terminal device that uses a relay can delay detecting the random access response, which can improve the success rate of the terminal device in receiving the random access response.

Optionally, the method further includes:

Receiving first indication information from the network device, where the first indication information is used to indicate the offset value.

The offset value may be configured by the network device to the terminal device.

Optionally, the offset value may be determined through negotiation between the network device and the terminal device, or the offset value may also be specified through an agreement. In short, the network device and the terminal device may be consistent.

If the offset value is determined through negotiation between the network device and the terminal device, or is stipulated by a protocol, the network device may not need to send the first indication information to the terminal device, which helps to save signaling overhead.

Optionally, the method further includes:

Receiving first indication information from the network device, where the first indication information is used to indicate the fourth value.

The fourth value may be configured by the network device to the terminal device. Alternatively, the fourth value may be negotiated and determined by the network device and the terminal device, or the fourth value may also be specified through an agreement. In short, the network device and the terminal device may be consistent.

If the fourth value is determined through negotiation between the network device and the terminal device, or is stipulated by a protocol, the network device may not need to send the first indication information to the terminal device, which helps to save signaling overhead.

Optionally, the random access wireless network temporary identifier corresponding to the random access response is related to the RSRP.

Since in the random access phase, the network equipment is still unable to obtain the identification of the terminal equipment, the random access preamble sent by the network equipment will contain the random access radio link associated with the resource location used by the random access preamble sent by the terminal equipment. The temporary network identifier, the temporary identifier of the random access wireless network is used for the terminal device to identify whether the received random access preamble corresponds to the terminal device. For example, the time resource and frequency resource of the random access preamble sent by terminal device 1 at the cell edge and terminal device 2 at the cell center are the same. Since the random access preamble of terminal device 1 will be forwarded to the network device through a relay, the network The device will receive two random access preambles from terminal device 1 and terminal device 2 respectively. For example, the cell has only one uplink carrier. If the current random access wireless network temporary identification calculation method is used, the calculated value of the random access wireless network temporary identification of the terminal device 1 and the random access wireless network temporary identification of the terminal device 2 are calculated. The value of the network temporary identifier is the same. At this time, the terminal device 1 may misunderstand the random access preamble sent by the network device to the terminal device 2 as the random access preamble of the terminal device 1, resulting in a communication error. For terminal equipment in different locations, the measured RSRP may be different. For this reason, in the embodiments of the present application, the temporary identification of the random access wireless network may be related to the RSRP. For example, if the RSRP is different, the temporary identification of the random access wireless network is different. Therefore, terminal devices with different RSRP can respectively determine the corresponding random access wireless network temporary identifiers, try to avoid mistaking the random access wireless network temporary identifiers corresponding to other terminal devices as their own, and reduce the probability of communication errors.

Optionally, when the RSRP is greater than or equal to the RSRP threshold, the random access wireless network temporary identifier is the second value; or, when the RSRP is less than the RSRP threshold, the random access wireless network The network temporary identification is the third value. Wherein, the second value is different from the third value.

Or, when the RSRP is greater than the RSRP threshold, the random access wireless network temporary identifier is the second value; or, when the RSRP is less than or equal to the RSRP threshold, the random access wireless network temporary Identified as the third value. Wherein, the second value is different from the third value.

That is, for the case where the RSRP measured by the terminal device is equal to the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit may be equal to the first value, or the start time of the time window and the first time The time difference between the end time of a time unit may also be equal to the sum of the first value and the offset value.

In the embodiment of the present application, for a terminal device whose measured RSRP is less than (or equal to) the RSRP threshold, the identifier of the uplink carrier corresponding to the terminal device can be set to the third value, and the measured RSRP is greater than ( Or equal to) the RSRP threshold value of the terminal device, the value of the identifier of the uplink carrier corresponding to the terminal device may be a second value, and the second value is different from the third value. In this way, different terminal devices (or terminal devices in different locations) correspond to different values of the random access wireless network temporary identifiers, and the terminal devices can correctly identify the corresponding random access responses to avoid A communication error has occurred. For example, the second value may be zero, and the third value may not be zero.

Optionally, the method further includes: receiving second indication information from the network device, where the second indication information is used to indicate the RSRP threshold.

The RSRP threshold may be configured by the network device to the terminal device. Alternatively, the RSRP threshold may be determined through negotiation between the network device and the terminal device, or may also be specified through an agreement.

In short, network equipment and terminal equipment can be consistent. Wherein, if the RSRP threshold is determined through negotiation between the network device and the terminal device, or is stipulated by a protocol, the network device may not need to send the second indication information to the terminal device, which helps to save signaling overhead.

With reference to the first aspect, in a possible implementation manner of the first aspect, the method further includes: receiving a first signal from the network device, where the first signal includes a synchronization signal or a reference signal. The first signal is measured to obtain the RSRP.

For example, the terminal device can obtain the RSRP through measurement, so that the RSRP can be compared with the RSRP threshold to determine the start time of the time window.

In a second aspect, a second communication method is provided, the method comprising: determining an offset value, wherein the offset value is used for the terminal device to determine the time to receive the random access response from the network device when the RSRP is less than the RSRP threshold Window; sending first indication information to the terminal device, where the first indication information is used to indicate the offset value.

Alternatively, the method of the second aspect includes: determining a fourth value, where the fourth value is used by the terminal device to determine a time window for receiving a random access response from the network device when the RSRP is less than the RSRP threshold; The device sends first indication information, where the first indication information is used to indicate the fourth value.

The method may be executed by a second communication device, and the second communication device may be a communication device or a communication device capable of supporting the communication device to implement the functions required by the method, such as a chip system. Exemplarily, the second communication device is a network device, or a chip system set in the network device for realizing the function of the network device, or other component used for realizing the function of the network device. In the following introduction process, it is taken as an example that the second communication device is a network device.

The terminal equipment at the edge of the cell generally needs to be forwarded through a relay when sending uplink signals. The terminal equipment at the cell center generally does not need to be relayed when sending the uplink signal, and can send directly. Therefore, compared with the terminal equipment at the cell center For random access requests, the time for the random access request sent by the terminal equipment at the cell edge to reach the network equipment will be delayed. Correspondingly, the time for the network equipment to send the random access response to the terminal equipment at the cell edge, Compared with the time for the network device to send the random access response to the terminal device in the center of the cell, there is also a delay. If the terminal devices all perform detection in the same time window, the random access response sent by the network device to the terminal device at the edge of the cell may not fall within the time window for the terminal device to perform the detection.

The measured RSRP may be different for terminal equipment in different positions of the cell. Therefore, in order to improve the success rate of receiving the random access response by the terminal device at the edge of the cell, in the embodiment of the present application, the network device may determine the offset value or the fourth value, and the offset value or the fourth value may be used for the terminal The device determines the time window for receiving the random access response from the network device when the RSRP is less than the RSRP threshold. If the RSRP is less than the RSRP threshold, the terminal device is likely to be at the edge of the cell. Therefore, the offset value or the fourth value can be used for The terminal device whose RSRP is less than the RSRP threshold determines the time window for receiving the random access response from the network device. Through the offset value or the fourth value, the start time of the time window for receiving the random access response determined by the terminal equipment at the cell edge can be relative to the time window for receiving the random access response determined by the terminal equipment at the cell center. For the start of the time window, there will be a delay, that is to say, compared with the terminal equipment at the cell center, the terminal equipment at the edge of the cell can be delayed for a period of time before receiving the random access response, because the network equipment Sending random access responses to the terminal equipment at the edge of the cell may also be delayed for a period of time. Therefore, the terminal equipment delays receiving the random access response, which can improve the success rate of receiving the random access response.

With reference to the second aspect, in a possible implementation manner of the second aspect, the method further includes: sending second indication information to the terminal device, where the second indication information is used to indicate the RSRP threshold.

The RSRP threshold may be configured by the network device to the terminal device. Alternatively, the RSRP threshold may also be negotiated and determined by the network device and the terminal device, or it may be specified through an agreement.

With reference to the second aspect, in a possible implementation manner of the second aspect,

Receive the random access preamble from the terminal device in the first time unit;

Send a random access response to the terminal device in a second time unit in the time window, wherein the start time of the time window is located after the end time of the first time unit in the time domain.

The network device configures an offset value or a fourth value for the terminal device, and the terminal device whose measured RSRP is less than the RSRP threshold can determine the start time of the time window for receiving the random access response according to the offset value or the fourth value. When a network device sends a random access response to a terminal device at the edge of a cell, it can also send it within this time window. Among them, the terminal equipment whose measured RSRP is less than the RSRP threshold may be the terminal equipment at the edge of the cell. Therefore, the technical solutions provided by the embodiments of the present application can enable terminal devices whose measured RSRP is less than the RSRP threshold to detect random access responses within this time window, and improve the reception of random access responses by terminal devices at the edge of the cell. Success rate.

In a third aspect, a communication device is provided, for example, the communication device is the first communication device as described above. The first communication device is configured to execute the foregoing first aspect or the method in any possible implementation manner of the first aspect. Specifically, the first communication device may include a module for executing the method in the first aspect or any possible implementation of the first aspect, for example, including a processing module and a transceiver module. Exemplarily, the first communication device is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a terminal device. In the following, it is taken as an example that the first communication device is a terminal device. For example, the transceiver module may also be implemented by a transceiver, and the processing module may also be implemented by a processor. If the first communication device is a communication device, the transceiver is realized by, for example, an antenna, a feeder, and a codec in the communication device. Or, if the first communication device is a chip set in a communication device, the transceiver is, for example, a communication interface in the chip, and the communication interface is connected with a radio frequency transceiver component in the communication device to implement information transmission and reception through the radio frequency transceiver component. During the introduction of the third aspect, the processing module and the transceiver module are used as examples to continue the introduction. among them,

The transceiver module is configured to send a random access preamble to a network device in a first time unit;

The processing module is configured to determine the start time of the time window according to the reference signal received power RSRP, wherein the start time of the time window is located after the end time of the first time unit in the time domain; and

The transceiver module is further configured to start detecting a random access response in response to the random access preamble at the starting moment.

or,

The transceiver module is further configured to start detecting a random access response in response to the random access preamble at the beginning of a time window, wherein the beginning of the time window is determined according to RSRP, and the The start time of the time window is located after the end time of the first time unit in the time domain. Or, the processing module is further configured to start detecting a random access response in response to the random access preamble at the start time of the time window, wherein the start time of the time window is determined according to RSRP, and The start time of the time window is located after the end time of the first time unit in the time domain.

In combination with the third aspect, in a possible implementation manner of the third aspect,

In the case that the RSRP is greater than or equal to the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit is equal to a first value; or,

In the case that the RSRP is less than the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit is equal to the sum of the first value and the offset value;

Wherein, the first value and the offset value are both greater than zero.

In the case that the RSRP is less than the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit is equal to a fourth value;

Wherein, the first value and the fourth value are both greater than zero.

With reference to the third aspect, in a possible implementation manner of the third aspect, the transceiver module is further configured to receive first indication information from the network device, where the first indication information is used to indicate the bias Shift value.

With reference to the third aspect, in a possible implementation manner of the third aspect, the transceiver module is further configured to receive first indication information from the network device, where the first indication information is used to indicate the second Four values.

With reference to the third aspect, in a possible implementation manner of the third aspect, the random access wireless network temporary identifier corresponding to the random access response is related to the RSRP.

In the case that the RSRP is greater than or equal to the RSRP threshold, the temporary identification of the random access wireless network is the second value; or,

In the case that the RSRP is less than the RSRP threshold, the temporary random access wireless network identifier is a third value;

Wherein, the second value is different from the third value.

With reference to the third aspect, in a possible implementation manner of the third aspect, the transceiver module is further configured to receive second indication information from the network device, where the second indication information is used to indicate the RSRP Threshold.

The transceiver module is further configured to receive a first signal from the network device, where the first signal includes a synchronization signal or a reference signal;

The processing module is further configured to measure the first signal to obtain the RSRP.

Regarding the technical effects of the third aspect or various possible implementation manners of the third aspect, reference may be made to the introduction of the technical effects of the first aspect or the corresponding implementation manners of the first aspect.

In a fourth aspect, a communication device is provided, for example, the communication device is the second communication device as described above. The second communication device is configured to execute the foregoing second aspect or the method in any possible implementation manner of the second aspect. Specifically, the third communication device may include a module for executing the method in the second aspect or any possible implementation manner of the second aspect, for example, including a processing module and a transceiver module. Exemplarily, the second communication device is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a network device. In the following, take the second communication device as a network device as an example. For example, the transceiver module may also be implemented by a transceiver, and the processing module may also be implemented by a processor. If the second communication device is a communication device, the transceiver is realized by, for example, an antenna, a feeder, and a codec in the communication device. Or, if the second communication device is a chip set in a communication device, the transceiver is, for example, a communication interface in the chip, and the communication interface is connected with a radio frequency transceiver component in the communication device to implement information transmission and reception through the radio frequency transceiver component. In the introduction of the fourth aspect, the processing module and the transceiver module are used as examples to continue the introduction. among them,

The processing module is configured to determine an offset value, where the offset value is used by the terminal device to determine a time window for receiving a random access response from the network device when the reference signal received power RSRP is less than the RSRP threshold;

The transceiver module is configured to send first indication information to the terminal device, where the first indication information is used to indicate the offset value.

or,

The processing module is configured to determine a fourth value, where the fourth value is used by the terminal device to determine a time window for receiving a random access response from the network device when the reference signal received power RSRP is less than the RSRP threshold;

The transceiver module is configured to send first indication information to the terminal device, where the first indication information is used to indicate the fourth value.

With reference to the fourth aspect, in a possible implementation manner of the fourth aspect, the transceiver module is further configured to send second indication information to the terminal device, where the second indication information is used to indicate the RSRP threshold .

With reference to the fourth aspect, in a possible implementation manner of the fourth aspect, the transceiver module is further configured to:

Regarding the technical effects of the fourth aspect or various possible implementation manners of the fourth aspect, reference may also be made to the introduction of the technical effects of the second aspect or various possible implementation manners of the second aspect.

In a fifth aspect, a communication device is provided. The communication device is, for example, the first communication device as described above. The communication device includes a processor. Optionally, it may also include a memory for storing computer instructions. The processor and the memory are coupled with each other, and are used to implement the foregoing first aspect or the methods described in various possible implementation manners of the first aspect. Alternatively, the first communication device may not include a memory, and the memory may be located outside the first communication device. Optionally, the first communication device may further include a communication interface for communicating with other devices or equipment. The processor, the memory, and the communication interface are coupled with each other, and are used to implement the foregoing first aspect or the methods described in various possible implementation manners of the first aspect. For example, when the processor executes the computer instructions stored in the memory, the first communication device is caused to execute the foregoing first aspect or the method in any one of the possible implementation manners of the first aspect. Exemplarily, the first communication device is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a terminal device. In the following, it is taken as an example that the first communication device is a terminal device. Wherein, if the first communication device is a communication device, the communication interface is realized by, for example, a transceiver in the communication device, for example, the transceiver is realized by an antenna, a feeder, and a codec in the communication device. Or, if the first communication device is a chip set in a communication device, the communication interface is, for example, an input/output interface of the chip, such as an input/output pin, etc., and the communication interface is connected to the radio frequency transceiver component in the communication device to Information is sent and received through radio frequency transceiver components. among them,

The memory is used to store computer instructions;

The communication interface is used to send a random access preamble to a network device in a first time unit;

The processor is configured to execute computer instructions stored in the memory to determine the start time of the time window according to the reference signal received power RSRP, wherein the start time of the time window is located in the first time domain in the time domain. After the end of the time unit; and

The communication interface is further configured to start detecting a random access response in response to the random access preamble at the starting moment.

or,

The communication interface is further configured to start detecting a random access response in response to the random access preamble at the beginning of a time window, wherein the beginning of the time window is determined according to RSRP, and the The start time of the time window is located after the end time of the first time unit in the time domain. Or, the processor is further configured to start detecting a random access response in response to the random access preamble at the start time of the time window, wherein the start time of the time window is determined according to RSRP, and The start time of the time window is located after the end time of the first time unit in the time domain.

With reference to the fifth aspect, in a possible implementation manner of the fifth aspect,

Wherein, the first value and the offset value are both greater than zero.

With reference to the fifth aspect, in a possible implementation manner of the fifth aspect, the communication interface is further configured to receive first indication information from the network device, where the first indication information is used to indicate the bias Shift value.

With reference to the fifth aspect, in a possible implementation manner of the fifth aspect, the random access wireless network temporary identifier corresponding to the random access response is related to the RSRP.

Wherein, the second value is different from the third value.

With reference to the fifth aspect, in a possible implementation manner of the fifth aspect, the communication interface is further configured to receive second indication information from the network device, and the second indication information is used to indicate the RSRP Threshold.

The communication interface is further configured to receive a first signal from the network device, where the first signal includes a synchronization signal or a reference signal;

The processor is further configured to measure the first signal to obtain the RSRP.

Regarding the technical effects of the fifth aspect or various possible implementation manners of the fifth aspect, reference may be made to the introduction of the technical effects of the first aspect or the corresponding implementation manners of the first aspect.

In a sixth aspect, a communication device is provided. The communication device is, for example, the second communication device as described above. The communication device includes a processor. Optionally, memory may also be included. The processor and the memory are coupled with each other, and are used to implement the foregoing second aspect or the methods described in various possible implementation manners of the second aspect. Alternatively, the second communication device may not include a memory, and the memory may be located outside the second communication device. Optionally, the second communication device may further include a communication interface for communicating with other devices or equipment. The processor, the memory, and the communication interface are coupled with each other, and are used to implement the foregoing second aspect or the methods described in various possible implementation manners of the second aspect. For example, when the processor executes the computer instructions stored in the memory, the second communication device is caused to execute the foregoing second aspect or the method in any one of the possible implementation manners of the second aspect. Exemplarily, the second communication device is a communication device, or a chip or other component provided in the communication device. Exemplarily, the communication device is a network device. In the following, it is taken as an example that the second communication device is a network device. Wherein, if the second communication device is a communication device, the communication interface is realized by a transceiver in the communication device, for example, the transceiver is realized by an antenna, a feeder, a codec, etc. in the communication device. Or, if the second communication device is a chip set in a communication device, the communication interface is, for example, an input/output interface of the chip, such as an input/output pin, etc., and the communication interface is connected to a radio frequency transceiver component in the communication device to Information is sent and received through radio frequency transceiver components. among them,

The memory is used to store computer instructions;

The processor is configured to execute computer instructions stored in the memory to determine an offset value, where the offset value is used by the terminal device to determine to receive from the network device when the reference signal received power RSRP is less than the RSRP threshold. The time window of random access response;

The communication interface is configured to send first indication information to the terminal device, where the first indication information is used to indicate the offset value.

With reference to the sixth aspect, in a possible implementation manner of the sixth aspect, the communication interface is further configured to send second indication information to the terminal device, where the second indication information is used to indicate the RSRP threshold .

With reference to the sixth aspect, in a possible implementation manner of the sixth aspect, the communication interface is further used for:

Regarding the technical effects of the sixth aspect or various possible implementation manners of the sixth aspect, reference may also be made to the introduction of the technical effects of the second aspect or various possible implementation manners of the second aspect.

In a seventh aspect, a communication system is provided. The communication system includes the communication device described in the third aspect or the communication device described in the fifth aspect, and the communication device described in the fourth aspect or the communication device described in the sixth aspect. Communication device.

In an eighth aspect, a computer-readable storage medium is provided, the computer-readable storage medium is used to store computer instructions, and when the computer instructions run on a computer, the computer executes the first aspect or the first aspect. The method described in any one of the possible implementations.

In a ninth aspect, a computer-readable storage medium is provided, the computer-readable storage medium is used to store computer instructions, and when the computer instructions run on a computer, the computer executes the second aspect or the second aspect described above. The method described in any one of the possible implementations.

In a tenth aspect, a computer program product containing instructions is provided. The computer program product is used to store computer instructions. When the computer instructions run on a computer, the computer can execute the first aspect or the first aspect described above. The method described in any one of the possible implementations.

In an eleventh aspect, a computer program product containing instructions is provided, the computer program product is used to store computer instructions, and when the computer instructions run on a computer, the computer executes the second aspect or the second aspect described above. The method described in any one of the possible implementations.

In the embodiment of the present application, the terminal device at the edge of the cell may delay receiving the random access response for a period of time, because the network device may also be delayed for a period of time when sending the random access response to the terminal device at the edge of the cell, so the terminal The device delays receiving the random access response, which can improve the success rate of receiving the random access response.

Description of the drawings

Figure 1 is a schematic diagram of a relay scenario;

Figure 2 is a schematic diagram of an application scenario of an embodiment of the application;

FIG. 3 is a flowchart of a communication method provided by an embodiment of this application;

FIG. 4 is a schematic diagram of a time window for receiving a random access response determined by an embodiment of the application;

FIG. 5 is a schematic block diagram of a terminal device provided by an embodiment of the application;

FIG. 6 is another schematic block diagram of a terminal device provided by an embodiment of this application;

FIG. 7 is a schematic block diagram of a network device provided by an embodiment of this application;

FIG. 8 is another schematic block diagram of a network device provided by an embodiment of this application;

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

FIG. 10 is another schematic block diagram of a communication device provided by an embodiment of this application;

FIG. 11 is still another schematic block diagram of a communication device provided by an embodiment of this application;

FIG. 12 is another schematic block diagram of a communication device provided by an embodiment of this application.

detailed description

In order to make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Hereinafter, some terms in the embodiments of the present application will be explained to facilitate the understanding of those skilled in the art.

1) Terminal devices, including devices that provide users with voice and/or data connectivity, specifically, include devices that provide users with voice, or include devices that provide users with data connectivity, or include devices that provide users with voice and data connectivity Sexual equipment. For example, it may include a handheld device with a wireless connection function, or a processing device connected to a wireless modem. The terminal device can communicate with the core network via a radio access network (RAN), exchange voice or data with the RAN, or exchange voice and data with the RAN. The terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, device-to-device communication (device-to-device, D2D) terminal equipment, vehicle to everything (V2X) terminal equipment , Machine-to-machine/machine-type communications (M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, subscriber unit, subscriber station (subscriber) station), mobile station (mobile station), remote station (remote station), access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user Agent (user agent), or user equipment (user device), etc. For example, it may include mobile phones (or "cellular" phones), computers with mobile terminal equipment, portable, pocket-sized, hand-held, mobile devices with built-in computers, and so on. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants, PDA), and other equipment. It also includes restricted devices, such as devices with low power consumption, or devices with limited storage capabilities, or devices with limited computing capabilities. Examples include barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners and other information sensing equipment.

As an example and not a limitation, in the embodiment of the present application, the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for using wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes Wait. A wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a kind of hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-sized, complete or partial functions that can be implemented without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.

The various terminal devices described above, if they are located on the vehicle (for example, placed in the vehicle or installed in the vehicle), can be regarded as vehicle-mounted terminal equipment, for example, the vehicle-mounted terminal equipment is also called on-board unit (OBU). ).

In the embodiments of the present application, it can also be understood that all that can perform data communication with a base station can be regarded as a terminal device.

2) Network equipment, including, for example, access network (AN) equipment, such as a base station (e.g., access point), which may refer to equipment that communicates with wireless terminal equipment through one or more cells on the air interface in the access network Or, for example, a network device in a vehicle-to-everything (V2X) technology is a roadside unit (RSU). The base station can be used to convert the received air frame and IP packet to each other, as a router between the terminal device and the rest of the access network, where the rest of the access network can include the IP network. The RSU can be a fixed infrastructure entity that supports V2X applications, and can exchange messages with other entities that support V2X applications. The network equipment can also coordinate the attribute management of the air interface. For example, the network equipment may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in an LTE system or a long term evolution-advanced (LTE-A), or may also include a 5G NR system ( Also referred to as the NR system) next generation node B (next generation node B, gNB) or may also include the centralized unit (CU) and centralized unit (CU) in the cloud access network (cloud radio access network, Cloud RAN) system A distributed unit (DU) is not limited in the embodiment of the present application.

3) Relay. For cellular wireless communication networks such as NR or LTE, the method of adding intermediate nodes can be used to improve the performance of the cell edge. Such intermediate nodes are usually called relays, or relay nodes or relay devices. Or relay equipment, etc. The relay can be used to receive signals from terminal devices and forward the received signals from terminal devices to network devices. The relay can be realized by terminal equipment, or can also be realized by network equipment, for example, it can be realized by a wireless access point (AP).

4) The time unit, such as a slot or a subframe, or other time units. For example, the first time unit may refer to the first time slot or the first subframe.

5) Time slot. A time slot in the NR system includes 14 orthogonal frequency division multiplexing (OFDM) symbols. For example, the time slot length corresponding to the 15kHz subcarrier interval is 1ms, and the 30kHz subcarrier interval corresponds to the time slot. The gap length is 0.5ms.

6) The terms "system" and "network" in the embodiments of this application can be used interchangeably. "At least one" means one or more, and "plurality" means two or more. "And/or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects before and after are in an "or" relationship. "The following at least one item (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a). For example, at least one item (a) of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple .

And, unless otherwise stated, the ordinal numbers such as "first" and "second" mentioned in the embodiments of this application are used to distinguish multiple objects, and are not used to limit the order, timing, priority, or order of multiple objects. Importance. For example, the first value and the second value are only for distinguishing different values, but do not indicate the difference in content, priority, or importance of the two values.

The foregoing introduces some terms and concepts involved in the embodiments of the present application, and the technical features involved in the embodiments of the present application are introduced below.

For NR or LTE cellular wireless communication networks, the method of adding intermediate nodes can be adopted to improve the performance of the cell edge. Such intermediate nodes are usually called relays. Considering that the transmission power of the network device is often much greater than the transmission power of the terminal device, this makes the downlink transmission performance from the network device to the terminal device generally better than the uplink transmission performance from the terminal device to the network device. Therefore, the main function of the relay can be to improve the uplink performance of the terminal equipment at the edge of the cell.

Refer to Figure 1, which is a relay scenario. In FIG. 1, the network device is, for example, a gNB, the terminal device 1 is located at the edge of the cell, and the terminal device 2 is located at the center of the cell. Among them, because the terminal device 2 is close to the network device, it can directly perform uplink communication or downlink communication with the network device. However, because the terminal device 1 is far away from the network device, the terminal device 1’s uplink Communication needs to be forwarded through the relay, that is, the terminal device 1 first sends the uplink signal to the relay, and the relay forwards the uplink signal received from the terminal device 1 to the network device, so that the network device can receive the uplink signal from the terminal device 1. signal. However, for downlink communication, the terminal device 1 can directly receive the downlink signal from the network device without forwarding through a relay.

At present, when a terminal device performs random access, it needs to send a preamble to the network device first, and when the network device receives the preamble, it needs to send an RAR to the terminal device. On the one hand, after the terminal device finishes sending the preamble, it will try to detect the RAR for a period of time, and this period of time is usually called the RAR receiving window. The starting time of the RAR receiving window is predefined by the protocol, for example, it is called the preset starting time, which is generally the starting time of the nth time unit after the terminal device sends the preamble, and the time length of the RAR receiving window is the network Device configuration, for example, the network device will send an indication message (for example, in the NR system, the indication information can be realized by the random access response window (ra-ResponseWindow) command word), which is used to configure the time length of the RAR receiving window. The unit of time length is usually a time unit. The time unit is, for example, a subframe or a time slot.

On the other hand, because in the random access phase, the network equipment cannot obtain the identification of the terminal equipment, so the RAR sent by the network equipment will contain the identification associated with the resource location used by the preamble sent by the terminal equipment, which is called random access. Incoming wireless network temporary identity (random access-radio network temporary identity, RA-RNTI), RA-RNTI is used for the terminal device to identify whether the received RAR corresponds to the terminal device. The calculation method of RA-RNTI can refer to formula 1:

RA-RNTI=1+s _id +14×t _id +14×80×f _id +14×80×8×ul _{carrier_id} (Formula 1)

Among them, s _id and t _id are related to the number of the time resource where the preamble is located. The f _{id is} related to the frequency domain resource number where the preamble is located. The frequency domain resource here may be at the physical resource block (PRB) level. For example, 6 PRBs may be regarded as one frequency domain resource. The ul _{carrier_id is} related to the number of the carrier where the preamble is located. When a cell has only one uplink carrier, the value of _{ul carrier_id is 0.}

For the relay scenario, the random access preamble sent by the terminal device at the cell edge will be forwarded to the network device through the relay, which makes the time for the random access preamble to reach the network device compared to the terminal device in the non-relay scenario. The random access preamble sent will have a larger delay, so the time resource of the RAR sent by the network device will also have a larger delay compared to the non-relay scenario, and the delay may exceed the RAR. The length of the receiving window. If the configuration method of the RAR receiving window as described above is still used, the terminal device will not be able to receive the RAR.

In view of this, the technical solutions of the embodiments of the present application are provided. In the embodiment of the present application, the terminal device can determine the start time of the time window for the terminal device to receive the random access response according to the RSRP. In this way, the terminal device at the edge of the cell and the terminal device at the center of the cell have different RSRPs. Therefore, The start time of the time window for receiving the random access response corresponding to the terminal equipment in different positions may be different. For example, the start time of the time window determined by the terminal equipment at the edge of the cell may be later than the start time of the time window for receiving the random access response determined by the terminal equipment at the cell center. For the terminal equipment at the cell edge, the terminal equipment at the cell edge can delay receiving the random access response for a period of time, because the network equipment may also be delayed for a period of time when sending the random access response to the terminal equipment at the cell edge. The device delays receiving the random access response, which can improve the success rate of receiving the random access response.

An application scenario of the embodiment of the present application may be a relay scenario, and reference may be made to FIG. 2. Figure 2 includes network equipment, relays and terminal equipment. The uplink communication of the terminal device needs to be forwarded through the relay, that is, the terminal device first sends the uplink signal to the relay, and the relay forwards the uplink signal received from the terminal device to the network device, so that the network device can receive the signal from the terminal device The uplink signal. But for downlink communication, the terminal device can directly receive the downlink signal from the network device without forwarding through a relay.

The network device in FIG. 2 is, for example, a base station. Among them, network equipment can correspond to different equipment in different systems. For example, in the fourth generation mobile communication technology (4th generation, 4G) system, it can correspond to the network equipment in the 4G system, such as eNB. In the 5G system, it can correspond to the 5G system. Network equipment in the network, such as gNB. The relay in FIG. 2 is implemented by a network device as an example, such as an AP.

Of course, in addition to the scenario shown in FIG. 2, the scenario shown in FIG. 1 may also be used as an application scenario of the embodiment of the present application.

The following describes the technical solutions provided by the embodiments of the present application in conjunction with the accompanying drawings.

The embodiment of the present application provides a first communication method. Please refer to FIG. 3, which is a flowchart of this method. In the following introduction process, the application of this method to the network architecture shown in FIG. 2 is taken as an example. In addition, the method can be executed by two communication devices, such as a first communication device and a second communication device, where the first communication device can be a network device or can support the network device to implement the functions required by the method. The communication device or the first communication device may be a terminal device or a communication device capable of supporting the terminal device to implement the functions required by the method, and of course it may also be other communication devices, such as a chip system. The same is true for the second communication device. The second communication device may be a network device or a communication device capable of supporting the functions required by the network device to implement the method, or the second communication device may be a terminal device or capable of supporting the terminal device to implement the method. The communication device with the required functions can of course also be other communication devices, such as a chip system. And there are no restrictions on the implementation of the first communication device and the second communication device. For example, the first communication device may be a network device, the second communication device is a terminal device, or both the first communication device and the second communication device are network devices. The device, or the first communication device and the second communication device are both terminal devices, or the first communication device is a network device, and the second communication device is a communication device capable of supporting the terminal device to implement the functions required by the method, and so on. Among them, the network device is, for example, a base station.

For ease of introduction, in the following, the execution of the method by the terminal device and the network device is taken as an example, that is, the first communication device is a terminal device and the second communication device is a network device as an example. Because this embodiment is applied to the network architecture shown in FIG. 2 as an example, the network device described in the following may be a network device in the network architecture shown in FIG. 2, and the terminal device described in the following may be Figure 2 shows the terminal equipment in the network architecture.

S31. The network device determines an offset value or a fourth value, where the offset value is used by the terminal device to determine a time window for receiving a random access response from the network device, and the fourth value is used by the terminal device to determine to receive a random access response from the network device. Access response time window. For example, the offset value is used for the terminal device to determine the time window for receiving the random access response from the network device when the measured RSRP is less than the RSRP threshold. The fourth value may also be used for the terminal device to determine the time window for receiving the random access response from the network device when the measured RSRP is less than the RSRP threshold. Wherein, in FIG. 3, the network device determines the offset value as an example, but S31 in FIG. 3 can also be replaced with that the network device determines the fourth value.

For a terminal device at the edge of a cell, it may send an uplink signal to the network device through a relay. Compared with the uplink signal sent to the network device through the relay, the uplink signal sent through the relay will have a certain delay to reach the network device. For example, the preamble sent by the terminal equipment at the cell edge may be forwarded to the network equipment through a relay, which makes the time for the preamble to reach the network equipment longer than that of the preamble sent by the terminal equipment in the non-relay scenario. Extension. After the network device receives the preamble, it will send the RAR to the terminal device. For the terminal device that forwards the uplink signal through the relay, the time resource of the RAR sent by the network device to the terminal device is compared with the RAR in the non-relay scenario In terms of time resources, there will also be a relatively large time delay, which may exceed the time length of the RAR receiving window, which may cause the terminal device to fail to receive the RAR.

Therefore, the embodiment of the present application can provide an offset value. According to the offset value and the first value, the start time of the time window for the terminal device at the edge of the cell to receive the RAR can be determined, and the first value can be the aforementioned The time difference between the preset start time and the end time of the time unit for the terminal device to send the preamble, or in other words, the first value is the time for the terminal device in the center of the cell (or terminal device not on the edge of the cell) to receive the RAR The starting moment of the window. Among them, the terminal equipment in the center of the cell (or terminal equipment not at the edge of the cell) receives the starting time of the RAR time window, that is, the preset starting time, which can be specified by agreement, and the end of the first time unit The time can be determined by the terminal device, so the terminal device can determine the first value according to the end time of the first time unit and the preset start time. The so-called preset starting time is the starting time of the time window used to detect the RAR when the terminal device does not need to send the preamble to the network device through the relay, but directly sends the preamble to the network device. It is equivalent to that in the embodiment of the present application, the time window for the terminal device at the edge of the cell to receive the RAR is delayed by the offset value, so that the RAR sent by the network device falls within the time window as much as possible, and the terminal device can Detecting the RAR within the time window also increases the success rate of the terminal device in receiving the RAR. The preset start time may be the start time of the RAR receiving window specified in the protocol, and generally is the start time of the nth time unit after the terminal device sends the preamble.

Among them, the first value is greater than zero, and the offset value is also greater than zero.

Alternatively, the embodiment of the present application may provide a fourth value, and the start time of the time window for the terminal device at the edge of the cell to receive the RAR can be determined based on the fourth value. As an optional implementation manner, the fourth value may be greater than the first value, for example, the fourth value may be greater than or equal to the sum of the first value and the offset value. For the first value and the offset value, please refer to the previous introduction. Among them, the fourth value can be greater than zero.

That is to say, the network device can configure the offset value, and the terminal device can determine the start time of the time window according to the first value and the offset value, or the network device can also configure the fourth value, and the terminal device can directly determine according to the fourth value. The start time of the time window, so that the terminal device does not even need to know the first value or the offset value, which is simpler for the terminal device.

The network device may determine the offset value or the fourth value according to corresponding factors. For example, the network device may determine the offset value or the fourth value according to one or more of information such as the processing capability of the relay or the time slot configuration of the cell. For example, the network device may determine the offset value or the fourth value according to the processing capability of the relay, or determine the offset value or the fourth value according to the time slot configuration of the cell, or according to the processing capability of the relay and the time slot configuration of the cell Determine the offset value or the fourth value. For example, different relays have different processing capabilities. Some relays have strong and better processing capabilities, and can forward uplink signals from terminal equipment to network equipment with a short delay. For the terminal equipment of the signal, the offset value or the fourth value determined by the network equipment can be smaller; or, some relays have poor capabilities and need to pass more delays to forward the uplink signal from the terminal equipment. For such terminal devices that relay and forward uplink signals, the offset value or the fourth value determined by the network device may be larger.

Alternatively, the offset value or the fourth value may not be determined by the network device, for example, it may be determined through negotiation between the network device and the terminal device, or may also be specified through a protocol. If the offset value or the fourth value is not determined by the network device, then S31 may not need to be executed, or S31 may also be executed, but S31 is actually, the network device determines the offset value or the fourth value through negotiation with the terminal device. Value, or the offset value or the fourth value is determined by agreement.

In addition, the embodiment of the present application does not limit the specific value of the offset value. For example, the offset value may be one or more time slots, or one or more subframes. Similarly, the embodiment of the present application does not limit the specific value of the fourth value. For example, the fourth value may be one or more time slots, or one or more subframes.

S32. The network device sends first instruction information to the terminal device, and the terminal device receives the first instruction information from the network device. If the network device is configured with the offset value, the first indication information is used to indicate the offset value, or if the network device is configured with the fourth value, the first indication information is used To indicate the fourth value.

Wherein, Fig. 3 is an example of the first indication information indicating the offset value, but if the network device determines the fourth value in S31, then S32 in Fig. 3 can also be replaced with that the first indication information indicates the fourth value. value.

After determining the offset value, the network device may send first indication information to the terminal device to indicate the offset value. After receiving the first indication information, the terminal device can determine the offset value.

Of course, if the offset value is not determined by the network device, for example, it is negotiated and determined by the network device and the terminal device, or is stipulated by the protocol, S32 may not need to be executed.

Or, if the network device determines the fourth value, the network device may send first indication information to the terminal device to indicate the fourth value. After receiving the first indication information, the terminal device can determine the fourth value.

Of course, if the fourth value is not determined by the network device, for example, it is determined by the network device and the terminal device through negotiation, or is stipulated by the protocol, S32 may not need to be executed.

S33. The network device sends second instruction information to the terminal device, and the terminal device receives the second instruction information from the network device. The second indication information is used to indicate the first threshold.

Generally speaking, when terminal devices in different locations in a cell measure signals from network devices, the measurement results obtained may be different. For example, a network device sends a first signal to a terminal device, and the terminal device receives the first signal from the network device. The terminal device measures the first signal and obtains a measurement result. The measurement result is, for example, reference signal receiving power. , RSRP) or reference signal receiving quality (reference signal receiving quality, RSRQ), etc. Taking the measurement result as RSRP as an example, the RSRP measured by the terminal equipment at the edge of the cell may be smaller than the RSRP measured by the terminal equipment at the center of the cell. Therefore, through the measurement results, the location of the terminal device in the cell can be determined accordingly, for example, it can be determined whether the terminal device is at the edge of the cell or at the center of the cell (or not at the edge of the cell). For example, the terminal device may compare the measurement result with the first threshold. If the measurement result is greater than or equal to the first threshold, the terminal device determines that the terminal device is located in the center of the cell (or not at the edge of the cell); and if the measurement result is less than the first threshold, For a threshold, the terminal device determines that the terminal device is located at the edge of the cell. Or, if the measurement result is greater than the first threshold, the terminal device determines that the terminal device is located at the cell center (or not at the cell edge); and if the measurement result is less than or equal to the first threshold, the terminal device determines that the terminal device is located at the cell edge.

Generally speaking, because the terminal equipment at the edge of the cell is far away from the network equipment, the uplink signal needs to be relayed, and the terminal equipment at the cell center is closer to the network equipment, and the uplink signal It does not need to be forwarded through a relay, but can be sent directly to a network device. Therefore, the terminal equipment at the cell center, or the terminal equipment not at the edge of the cell, will receive the random access response relatively early, while the terminal equipment at the cell edge will receive the random access response relatively later. Therefore, the terminal equipment at the edge of the cell may consider using the offset value or the fourth value to determine the start time of the time window for receiving the random access response, while the terminal equipment at the cell center may not need to use the offset value or the fourth value. To determine the start time of the time window for receiving the random access response.

In summary, it can be concluded that the terminal device can directly determine the starting time of the time window for receiving the random access response according to the measurement result. For example, the terminal device compares the measurement result with the first threshold value, and if the measurement result is greater than or equal to the first threshold value, the terminal device determines that there is no need to use the offset value or the fourth value to determine the start time of the time window for receiving the random access response (Or, the terminal device determines to use the first value to determine the start time of the time window for receiving the random access response); and if the measurement result is less than the first threshold, the terminal device determines that the terminal device is located at the edge of the cell. Or, if the measurement result is greater than the first threshold, the terminal device determines that there is no need to use the offset value or the fourth value to determine the start time of the time window for receiving the random access response (or, the terminal device determines to use the first value to determine the random access response. If the measurement result is less than or equal to the first threshold, the terminal device can determine to use the offset value or the fourth value to determine the start time of the time window for receiving the random access response. In this way, the start time of the time window for receiving the random access response can be directly determined through the measurement result, and the method is relatively simple.

Wherein, the first signal includes, for example, a synchronization signal, or includes a reference signal, or includes a synchronization signal and a reference signal. The synchronization signal is, for example, a synchronization signal/physical broadcast channel block (synchronization signal/physical broadcast channel block, SSB), and the reference signal is, for example, a channel state information-reference signal (CSI-RS). In addition, if the measurement result is RSRP, the first threshold may also be referred to as the RSRP threshold, or if the measurement result is RSRQ, the first threshold may also be referred to as the RSRQ threshold.

For example, the first indication information can be sent by broadcasting. For example, the first indication information can be sent by a system message. The terminal device can determine whether to use the offset value or the fourth value to determine the time window by determining whether it is located at the edge of the cell. Starting moment. The second indication information may also be sent in a broadcast manner. For example, the second indication information may also be sent in a system message.

The first instruction information and the second instruction information can be carried in the same message and sent, so S32 and S33 can be executed at the same time. Alternatively, the first indication information and the second indication information may also be carried in different messages and sent. If the first instruction information and the second instruction information are carried in different messages and sent, the network device may send the first instruction information first and then send the second instruction information, S32 is executed before S33; or the network device may send the second instruction first. The first instruction information is sent after the instruction information, and S33 is executed before S32; or, the network device may send the first instruction information and the second instruction information at the same time, and S32 and S33 are executed simultaneously.

S34. The terminal device sends a preamble to the network device within the first time unit, and the network device receives the preamble from the terminal device.

It can be considered that the network device will send the first instruction information and the second instruction information to the terminal device before receiving the preamble from the terminal device, and the terminal device will also receive the first instruction information from the network device before sending the preamble to the network device And the second instruction information.

For example, in the embodiment of the present application, the terminal device is a terminal device at the edge of a cell. Then the terminal device sends the preamble to the relay, and the relay forwards the preamble to the network device.

S35. The terminal device determines the start time of the time window according to the RSRP, where the start time of the time window is located after the end time of the first time unit in the time domain.

The terminal device may determine the start time of the time window according to the measurement result. Here, the measurement result is RSRP as an example. Therefore, it is also taken as an example that the first threshold is the RSRP threshold. Alternatively, S35 may not be performed as a step. For example, S35 may also be described as that the starting time of the time window is determined according to RSRP, and the starting time of the time window is located in the first time domain. After the end of the time unit.

After the terminal device sends the preamble, it needs to detect the RAR. Therefore, the terminal device can determine the time window for detecting RAR. The length of the time window used to detect RAR can be configured by the network device. Therefore, the terminal device can determine the time domain position of the time window as long as it determines the start time of the time window. For example, the network device may send third instruction information to the terminal device, and the terminal device receives the third instruction information from the network device, and the third instruction information is used to configure the time length of the time window. The unit of the time length is usually a time unit, and the time unit is, for example, a subframe or a time slot. For example, the third indication information may be sent through a system message. For example, in the NR system, the third indication information may be realized through the ra-ResponseWindow command word. The network device may send the third instruction information to the terminal device before receiving the preamble from the terminal device, and the terminal device may receive the third instruction information from the network device before sending the preamble to the network device. Among them, the first instruction information, the second instruction information, and the second instruction information can be carried in the same message and sent; or the first instruction information, the second instruction information, and the third instruction information can also be carried in different messages. Send; or, any two of the first indication information, the second indication information, and the third indication information can be carried in one message and sent, while the remaining other indication information is carried in a different message and sent.

If the RSRP measured by the terminal device is greater than or equal to the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit may be equal to the first value. Or, if the RSRP measured by the terminal device is less than the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit may be equal to the sum of the first value and the offset value, or the time difference may be equal to the fourth value .

Or, if the RSRP measured by the terminal device is greater than the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit may be equal to the first value. Alternatively, if the RSRP measured by the terminal device is less than or equal to the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit may be equal to the sum of the first value and the offset value, or the time difference may be equal to the first value. Four values.

That is, for the case where the RSRP measured by the terminal device is equal to the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit may be equal to the first value, or the start time of the time window and the first time The time difference at the end time of a time unit may also be equal to the sum of the first value and the offset value (or the time difference is equal to the fourth value).

It can be seen that when the terminal device determines the starting time of the time window, in addition to the offset value or the fourth value, the first value is also used. The first value can be the preset mentioned above. The time difference between the start time and the end time of the time unit at which the terminal device sends the preamble. The so-called preset start time is the start time of the time window used to detect RAR when the terminal device does not need to send the preamble to the network device through the relay, but directly sends the preamble to the network device, or it is understood as the preset start time. The start time is the start time of the time window for the terminal equipment located in the center of the cell (or no terminal equipment located at the edge of the cell, which means that the RSRP measured by the terminal equipment is greater than or equal to the RSRP threshold) to receive the RAR. The first value can be specified by agreement, or the preset starting time can be specified by agreement, and the terminal device can determine the first value according to the preset starting time and the end time of the first time unit. Therefore, the first value is for the terminal device. It can be considered as known.

If the RSRP measured by the terminal device is greater than or equal to the RSRP threshold, the terminal device may directly determine the start time of the time window according to the end time and the first value of the first time unit. Or, if the RSRP measured by the terminal device is less than the RSRP threshold, and the terminal device obtains the offset value, the terminal device can determine the start time of the time window according to the offset value and the first value after learning the offset value. Or, if the RSRP measured by the terminal device is less than the RSRP threshold, and the terminal device obtains the fourth value, the terminal device can determine the start time of the time window according to the fourth value after learning the fourth value.

For example, please refer to Figure 4, a schematic diagram of a time window determined for a terminal device whose measured RSRP is less than the RSRP threshold. In Figure 4, the terminal device determines the start of the time window based on the first value and the offset value. Take time as an example. The first two rows of FIG. 4 represent the start time of the time window for detecting RAR determined by the terminal device whose measured RSRP is greater than or equal to the RSRP threshold. The start time is the preset start time. The time difference between the end time of the time unit and the start time is the first value. Among them, direct uplink (direct UL) means that the terminal device does not need to pass through the relay, but can directly send the uplink signal to the network device. The last two rows of FIG. 4 represent the start time of the time window for detecting RAR determined by the terminal device whose measured RSRP is less than the RSRP threshold according to the offset value and the first value, and the end time of the first time unit and the start time. The time difference between the moments is the sum of the first value and the offset value. Among them, the relay UL (relay UL) means that the terminal device needs to send the uplink signal to the network device through the relay. It can be seen that there is a deviation between the start time of the time window determined by the terminal device whose measured RSRP is less than the RSRP threshold and the start time of the time window determined by the terminal device whose measured RSRP is greater than or equal to the RSRP threshold. The shift value, in other words, there is an offset value between the start time of the time window determined by the terminal device at the edge of the cell compared to the start time of the time window determined by the terminal device at the cell center. For example, a square in Figure 4 represents one time slot, then Figure 4 takes the offset value of 2 time slots as an example.

S36. The terminal equipment determines the RA-RNTI corresponding to the RAR according to the RSRP.

Among them, the terminal device may determine the RA-RNTI corresponding to the RAR according to the measurement result. Here, taking the measurement result as the RSRP as an example, that is, the terminal device determines the RA-RNTI corresponding to the RAR according to the measured RSRP. The terminal equipment determines the RA-RNTI corresponding to the RAR according to the measured RSRP. In this regard, it can also be considered that the RA-RNTI corresponding to the RAR is related to the RSRP measured by the terminal equipment.

As mentioned in the previous article, since the network equipment is still unable to obtain the identification of the terminal equipment in the random access phase, the RAR sent by the network equipment will contain the RA-RNTI associated with the resource location used by the preamble sent by the terminal equipment, RA -RNTI is used to let the terminal equipment identify whether the received RAR corresponds to the terminal equipment. For example, the time resource and frequency resource of the preamble sent by the terminal device 1 at the cell edge and the terminal device 2 at the cell center are the same. Since the preamble of the terminal device 1 will be forwarded to the network equipment through the relay, the network equipment will receive the data from Two preambles for terminal device 1 and terminal device 2. For example, the cell has only one uplink carrier. If the current RA-RNTI calculation method is used, the calculated value of RA-RNTI of terminal device 1 is the same as the value of RA-RNTI of terminal device 2. 1 The RAR sent by the network device to the terminal device 2 may be mistaken for the RAR of the terminal device 1, resulting in a communication error.

In order to solve this possible problem, in the embodiment of the present application, for a terminal device at the edge of a cell, or in other words, for a terminal device whose measured RSRP is less than (or equal to) the RSRP threshold, the terminal device can be set to correspond to The value of the identifier of the uplink carrier is the third value, and for the terminal equipment at the center of the cell (or for the terminal equipment not at the edge of the cell), or for the terminal whose measured RSRP is greater than (or equal to) the RSRP threshold Device, the value of the identifier of the uplink carrier corresponding to the terminal device may be the second value. Then, if the RSRP measured by the terminal device is less than (or equal to) the RSRP threshold, the terminal device can determine that the corresponding uplink carrier identifier is the third value, and if the RSRP measured by the terminal device is greater than (or equal to) the RSRP threshold , The terminal device can determine that the value of the corresponding uplink carrier identifier is the second value. Among them, the second value is different from the third value. In this way, the values of RA-RNTI corresponding to different terminal devices (or terminal devices in different locations) are different, and the terminal device can correctly identify the corresponding RAR and avoid communication errors. For example, the second value may be zero, and the third value may not be zero.

The identifier of the uplink carrier, for example, is expressed as ul _{carrier_id} . At present, when calculating RA-RNTI according to Formula 1, if the cell has only one uplink carrier, _{the value of ul carrier_id} is all 0. However, in the embodiments of the present application, _{the value of ul carrier_id} can be different according to the location of the terminal device, so that the RA-RNTI calculated by the terminal device in different locations is different, and the network device is different for different The terminal equipment at the location will also use different _{values of ul carrier_id} to calculate the RA-RNTI. The calculation results of the network equipment and the terminal equipment are consistent, and the terminal equipment can also identify the RAR corresponding to itself. And the location of the terminal device is different, the measurement result obtained by the terminal device measurement will also be different. Taking the measurement result as RSRP as an example, for example, if the terminal device determines that the measured RSRP is less than (or equal to) the RSRP threshold, the terminal device uses the _{third value of ul carrier_id} when calculating RA-RNTI, and the network device For terminal equipment at the edge of the cell, when calculating RA-RNTI, _{the value of ul carrier_id} used is also the third value; or if the terminal equipment determines that the measured RSRP is greater than (or equal to) the RSRP threshold, the terminal equipment is calculating RA -In the case of RNTI, _{the value of ul carrier_id} used is the second value, and for terminal devices that are not at the edge of the cell, the network device uses the value _{of ul carrier_id when calculating the RA-RNTI.} As an optional implementation manner, the second value may be 0, and the third value may be 1. Let the third value be 1, so that _{the two values of ul carrier_id} are continuous, and the values of the third value and the second value are "1" and "0" respectively, as long as 1 bit is passed. It can be realized and saves storage space. Of course, in addition to taking 1, the third value can also be other values, as long as the third value is different from the second value.

Among them, the calculation of RA-RNTI by terminal equipment and network equipment can be calculated by formula 1, so it is not repeated here.

S37. The network device will send the RAR in response to the preamble to the terminal device within the time window, and the terminal device will detect the RAR in response to the preamble within the time window. In other words, the terminal device starts to detect the RAR in response to the preamble sent by the terminal device from the beginning of the time window.

For a terminal device located in the center of the cell (or no terminal device located on the edge of the cell), it appears as a terminal device whose measured RSRP is greater than (or equal to) the RSRP threshold. The terminal device does not need to pass a relay when sending the preamble to the network device. , The network device can receive the preamble from the terminal device earlier. Then for the terminal device, the start time of the time window is the end time of the first time unit plus the first value. For network devices, RAR will also be sent within this time window.

Or, for a terminal device located at the edge of a cell, it appears as a terminal device whose measured RSRP is less than (or equal to) the RSRP threshold. The terminal device needs to pass through a relay when sending a preamble to the network device, and the network device may receive data from The preamble of the terminal device. Then for the terminal device, the start time of the time window is the end time of the first time unit plus the first value plus the offset value, or the end time of the first time unit plus the fourth Value of the moment. For network devices, RAR will also be sent within this time window.

For example, the network device may send the RAR to the terminal device in the second time unit included in the time window, and the terminal device may start to detect the RAR from the start time of the time window, so that the RAR may be received in the second time unit.

After the terminal device calculates the value of RA-RNTI, it can detect RAR based on the RA-RNTI. If the RA-RNTI included in the RAR detected by the terminal device is the same as the RA-RNTI calculated by the terminal device, it can be determined that the RAR is the RAR corresponding to the terminal device, and if the RAR detected by the terminal device includes the RA-RNTI and If the RA-RNTI calculated by the terminal device is different, it can be determined that the RAR does not correspond to the RAR of the terminal device.

In the embodiment of the present application, the terminal device can determine the start time of the time window for the terminal device to receive the random access response according to the RSRP. In this way, the terminal device at the edge of the cell and the terminal device at the center of the cell have different RSRPs. The start time of the time window for receiving the random access response corresponding to the terminal equipment in different locations may be different. For example, the start time of the time window determined by the terminal equipment at the edge of the cell may be later than the start time of the time window for receiving the random access response determined by the terminal equipment at the cell center. For terminal equipment at the cell edge, the terminal equipment at the cell edge can delay receiving the random access response for a period of time, because the network equipment may also be delayed for a period of time when sending the random access response to the terminal equipment at the cell edge. The device delays receiving the random access response, which can improve the success rate of receiving the random access response. The embodiment of the present application enables the terminal device to correctly receive the random access response in the scenario where the relay is deployed, and solves the problem that the terminal device at the cell edge cannot receive the RAR. And by resetting _{the value of ul carrier_id} , the problem that the terminal device incorrectly receives the RAR from other terminal devices is also solved, and the reliability of the terminal device receiving the RAR is improved.

The device used to implement the foregoing method in the embodiment of the present application will be described below in conjunction with the accompanying drawings. Therefore, the above content can all be used in the subsequent embodiments, and the repeated content will not be repeated.

FIG. 5 is a schematic block diagram of a communication device 500 provided by an embodiment of the application. Exemplarily, the communication device 500 is a terminal device 500, for example.

The terminal device 500 includes a processing module 510. Optionally, a transceiver module 520 may also be included. Exemplarily, the terminal device 500 may be a terminal device, or a chip applied to the terminal device, or other combination devices, components, etc. having the above-mentioned terminal device functions. When the terminal device 500 is a terminal device, the transceiver module 520 may be a transceiver, which may include an antenna and a radio frequency circuit, etc., and the processing module 510 may be a processor, such as a baseband processor. The baseband processor may include one or more central processing units. (central processing unit, CPU). When the terminal device 500 is a component with the aforementioned terminal function, the transceiver module 520 may be a radio frequency unit, and the processing module 510 may be a processor, such as a baseband processor. When the terminal device 500 is a chip system, the transceiver module 520 may be an input/output interface of a chip system (such as a baseband chip), and the processing module may be a processor of the chip system, and may include one or more central processing units.

Wherein, the processing module 510 may be used to perform all the operations performed by the terminal device in the embodiment shown in FIG. 3 except for the transceiving operations, such as S35 and S36, and/or other operations used to support the technology described herein. process. The transceiver module 520 may be used to perform all the transceiver operations performed by the terminal device in the embodiment shown in FIG. 3, such as S32, S33, S34, and S37, and/or other processes used to support the technology described herein.

In addition, the transceiver module 520 may be a functional module that can perform both sending and receiving operations. For example, the transceiver module 520 may be used to perform all the sending operations performed by the terminal device in the embodiment shown in FIG. 3 And receiving operations, for example, when performing a sending operation, the transceiver module 520 can be considered as a sending module, and when performing a receiving operation, the transceiver module 520 can be considered as a receiving module; or, the transceiver module 520 can also be a combination of two functional modules. Collectively, these two functional modules are the sending module and the receiving module. The sending module is used to complete the sending operation. For example, the sending module can be used to perform all the sending operations performed by the terminal device in the embodiment shown in FIG. 3. The receiving module For completing the receiving operation, for example, the receiving module may be used to perform all the receiving operations performed by the terminal device in the embodiment shown in FIG. 3.

For example, the transceiver module 520 is configured to send a random access preamble to the network device in a first time unit;

The processing module 510 is configured to determine the start time of the time window according to RSRP, wherein the start time of the time window is located after the end time of the first time unit in the time domain; and

The transceiver module 520 is further configured to start detecting a random access response in response to the random access preamble at the starting moment. Alternatively, it can also be considered that the processing module 510 is further configured to start detecting a random access response in response to the random access preamble at the starting moment.

or,

The transceiver module 520 is configured to send a random access preamble to the network device in the first time unit;

The transceiver module 520 is further configured to start detecting a random access response in response to the random access preamble at the beginning of the time window, where the beginning of the time window is determined according to RSRP, and the time The start time of the window is located after the end time of the first time unit in the time domain. Or it can be considered that the processing module 510 is also configured to start detecting a random access response in response to the random access preamble at the beginning of the time window, where the beginning of the time window is determined according to RSRP , And the start time of the time window is located after the end time of the first time unit in the time domain.

As an optional implementation,

Wherein, the first value and the offset value are both greater than zero.

As an optional implementation manner, the transceiver module 520 is further configured to receive first indication information from the network device, where the first indication information is used to indicate the offset value.

As an optional implementation,

In the case that the RSRP is less than the RSRP threshold, a fourth value such as a time difference between the start time of the time window and the end time of the first time unit;

Wherein, the first value and the fourth value are both greater than zero.

As an optional implementation manner, the fourth value is greater than the first value.

As an optional implementation manner, the transceiver module 520 is further configured to receive first indication information from the network device, where the first indication information is used to indicate the fourth value.

As an optional implementation manner, the random access wireless network temporary identifier corresponding to the random access response is related to the RSRP.

As an optional implementation,

Wherein, the second value is different from the third value.

As an optional implementation manner, the transceiver module 520 is further configured to receive second indication information from the network device, where the second indication information is used to indicate the RSRP threshold.

As an optional implementation,

The transceiver module 520 is further configured to receive a first signal from the network device, where the first signal includes a synchronization signal or a reference signal;

The processing module 510 is further configured to measure the first signal to obtain the RSRP.

It should be understood that the processing module 510 in the embodiment of the present application may be implemented by a processor or a processor-related circuit component, and the transceiver module 520 may be implemented by a transceiver or a transceiver-related circuit component.

As shown in FIG. 6, an embodiment of the present application also provides a communication device 600. Exemplarily, the communication device 600 is a terminal device 600, for example. Exemplarily, the terminal device 600 may be a communication device, such as a terminal device, or may also be a chip system or the like. The terminal device 600 includes a processor 610. Optionally, a memory 620 may also be included. Optionally, a transceiver 630 may also be included. The memory 620 stores computer instructions or programs, and the processor 610 can execute the computer instructions or programs stored in the memory 620. When the computer instructions or programs stored in the memory 620 are executed, the processor 610 is used to perform the operations performed by the processing module 510 in the foregoing embodiment, and the transceiver 630 is used to perform the operations performed by the transceiver module 520 in the foregoing embodiment. Alternatively, the terminal device 600 may not include the memory 620. For example, the memory is located outside the terminal device 600. When the computer instructions or programs stored in the external memory are executed, the processor 610 is used to execute what is executed by the processing module 510 in the foregoing embodiment. Operation, the transceiver 630 is configured to perform the operations performed by the transceiver module 520 in the foregoing embodiment.

Among them, the transceiver 630 may be a functional unit that can perform both sending and receiving operations. For example, the transceiver 630 may be used to perform all the sending operations performed by the terminal device in the embodiment shown in FIG. 3 And receiving operations. For example, when performing a sending operation, the transceiver 630 can be considered as a transmitter, and when performing a receiving operation, the transceiver 630 can be considered as a receiver; or, the transceiver 630 can also be a combination of two functional units. Collectively, these two functional units are the transmitter and the receiver respectively. The transmitter is used to complete the transmission operation. For example, the transmitter can be used to perform all the transmission operations performed by the terminal device in the embodiment shown in FIG. 3, and the receiver is used for To complete the receiving operation, for example, the receiver may be used to perform all the receiving operations performed by the terminal device in the embodiment shown in FIG. 3.

In addition, if the communication device 600 is a chip system, the transceiver 630 can also be implemented through a communication interface of the chip system, and the communication interface is connected to a radio frequency transceiver component in a communication device to realize information transmission and reception through the radio frequency transceiver component. The communication interface can be a functional unit that can complete both sending and receiving operations. For example, the communication interface can be used to perform all the sending and receiving operations performed by the terminal device in the embodiment shown in FIG. 3, For example, when performing a sending operation, the communication interface can be considered as a sending interface, and when performing a receiving operation, the communication interface can be considered as a receiving interface; or, the communication interface can also be a collective term for two functional units. They are a sending interface and a receiving interface. The sending interface is used to complete the sending operation. For example, the sending interface can be used to perform all the sending operations performed by the terminal device in the embodiment shown in FIG. 3, and the receiving interface is used to complete the receiving operation, for example, The receiving interface can be used to perform all receiving operations performed by the terminal device in the embodiment shown in FIG. 3.

It should be understood that the terminal device 500 or the terminal device 600 according to the embodiment of the present application can realize the function of the terminal device in the embodiment shown in FIG. 3, and the operation and/or function of each module in the terminal device 500 or the terminal device 600 In order to implement the corresponding processes in the embodiment shown in FIG. 3 respectively, for the sake of brevity, details are not described herein again.

FIG. 7 is a schematic block diagram of a communication device 700 according to an embodiment of the application. Exemplarily, the communication apparatus 700 is a network device 700, for example.

The network device 700 includes a processing module 710. Optionally, a transceiver module 720 may also be included. Exemplarily, the network device 700 may be a terminal device, or a chip applied in a terminal device, or other combination devices, components, etc. having the above-mentioned terminal device functions. When the network device 700 is a terminal device, the transceiver module 720 may be a transceiver, which may include an antenna and a radio frequency circuit, and the processing module 710 may be a processor, such as a baseband processor. The baseband processor may include one or more CPUs. When the network device 700 is a component with the aforementioned terminal function, the transceiver module 720 may be a radio frequency unit, and the processing module 710 may be a processor, such as a baseband processor. When the network device 700 is a chip system, the transceiver module 720 may be an input/output interface of the chip system (for example, a baseband chip), and the processing module may be a processor of the chip system, and may include one or more central processing units.

Wherein, the processing module 710 may be used to perform all operations other than the transceiving operation performed by the network device in the embodiment shown in FIG. 3, such as S31, and/or other processes used to support the technology described herein. The transceiver module 720 may be used to perform all the transceiver operations performed by the network device in the embodiment shown in FIG. 3, such as S32, S33, S34, and S37, and/or other processes used to support the technology described herein.

In addition, the transceiver module 720 may be a functional module that can perform both sending and receiving operations. For example, the transceiver module 720 may be used to perform all the sending operations performed by the network device in the embodiment shown in FIG. 3 And receiving operation, for example, when performing a sending operation, the transceiver module 720 can be considered as a sending module, and when performing a receiving operation, the transceiver module 720 can be considered as a receiving module; or, the transceiver module 720 can also be a combination of two functional modules. Collectively, these two functional modules are the sending module and the receiving module. The sending module is used to complete the sending operation. For example, the sending module can be used to perform all the sending operations performed by the network device in the embodiment shown in FIG. 3, and the receiving module For completing the receiving operation, for example, the receiving module may be used to perform all the receiving operations performed by the network device in the embodiment shown in FIG. 3.

For example, the processing module 710 is configured to determine an offset value, where the offset value is used by the terminal device to determine a time window for receiving a random access response from the network device when the reference signal received power RSRP is less than the RSRP threshold;

The transceiver module 720 is configured to send first indication information to the terminal device, where the first indication information is used to indicate the offset value.

or,

The processing module 710 is configured to determine a fourth value, where the fourth value is used by the terminal device to determine a time window for receiving a random access response from the network device when the reference signal received power RSRP is less than the RSRP threshold;

The transceiver module 720 is configured to send first indication information to the terminal device, where the first indication information is used to indicate the fourth value.

As an optional implementation manner, the transceiver module 720 is further configured to send second indication information to the terminal device, where the second indication information is used to indicate the RSRP threshold.

As an optional implementation manner, the transceiver module 720 is further configured to:

It is also used to receive the random access preamble from the terminal device in the first time unit;

It should be understood that the processing module 710 in the embodiment of the present application may be implemented by a processor or a processor-related circuit component, and the transceiver module 720 may be implemented by a transceiver or a transceiver-related circuit component.

As shown in FIG. 8, an embodiment of the present application also provides a communication device 800. Exemplarily, the communication device 800 is a network device 800, for example. Exemplarily, the network device 800 may be a communication device, such as a network device, or may also be a chip system or the like. The network device 800 includes a processor 810. Optionally, a memory 820 may also be included. Optionally, a transceiver 830 may also be included. The memory 820 stores computer instructions or programs, and the processor 810 can execute the computer instructions or programs stored in the memory 820. When the computer instructions or programs stored in the memory 820 are executed, the processor 610 is used to perform the operations performed by the processing module 710 in the foregoing embodiment, and the transceiver 630 is used to perform the operations performed by the transceiver module 720 in the foregoing embodiment. Alternatively, the network device 600 may not include the memory 820. For example, the memory is located outside the network device 800. When the computer instructions or programs stored in the external memory are executed, the processor 810 is used to execute what is executed by the processing module 710 in the foregoing embodiment. Operation, the transceiver 830 is configured to perform the operations performed by the transceiver module 720 in the foregoing embodiment.

The transceiver 830 may be a functional unit that can perform both sending and receiving operations. For example, the transceiver 830 can be used to perform all the sending operations performed by the network device in the embodiment shown in FIG. 3 And receiving operations. For example, when performing a sending operation, the transceiver 830 can be considered as a transmitter, and when performing a receiving operation, the transceiver 830 can be considered as a receiver; or, the transceiver 830 can also be a combination of two functional units. Collectively, these two functional units are a transmitter and a receiver respectively. The transmitter is used to complete the transmission operation. For example, the transmitter can be used to perform all the transmission operations performed by the network device in the embodiment shown in FIG. 3, and the receiver is used for To complete the receiving operation, for example, the receiver may be used to perform all the receiving operations performed by the network device in the embodiment shown in FIG. 3.

In addition, if the communication device 800 is a chip system, the transceiver 830 can also be implemented through a communication interface of the chip system, and the communication interface is connected to a radio frequency transceiving component in a communication device to implement information transceiving through the radio frequency transceiving component. The communication interface can be a functional unit that can complete both sending and receiving operations. For example, the communication interface can be used to perform all the sending and receiving operations performed by the network device in the embodiment shown in FIG. 3, For example, when performing a sending operation, the communication interface can be considered as a sending interface, and when performing a receiving operation, the communication interface can be considered as a receiving interface; or, the communication interface can also be a collective term for two functional units. They are a sending interface and a receiving interface. The sending interface is used to complete the sending operation. For example, the sending interface can be used to perform all the sending operations performed by the network device in the embodiment shown in FIG. 3, and the receiving interface is used to complete the receiving operation, for example, The receiving interface may be used to perform all the receiving operations performed by the network device in the embodiment shown in FIG. 3.

It should be understood that the network device 700 or the network device 800 according to the embodiment of the present application can implement the function of the network device in the embodiment shown in FIG. 3, and the operation and/or function of each module in the network device 700 or the network device 800 In order to implement the corresponding processes in the embodiment shown in FIG. 3 respectively, for the sake of brevity, details are not described herein again.

The embodiment of the present application also provides a communication device, and the communication device may be a terminal device or a circuit. The communication device may be used to perform the actions performed by the terminal device in the foregoing method embodiments.

When the communication device is a terminal device, FIG. 9 shows a simplified schematic diagram of the structure of the terminal device. It is easy to understand and easy to illustrate. In FIG. 9, the terminal device uses a mobile phone as an example. As shown in Figure 9, the terminal equipment includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device. The processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute the software program, and process the data of the software program. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for the conversion of baseband signal and radio frequency signal and the processing of radio frequency signal. The antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data. For ease of description, only one memory and processor are shown in FIG. 9. In an actual terminal device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or storage device. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.

In the embodiments of the present application, the antenna and radio frequency circuit with the transceiving function can be regarded as the transceiving unit of the terminal device, and the processor with the processing function can be regarded as the processing unit of the terminal device. As shown in FIG. 9, the terminal device includes a transceiving unit 910 and a processing unit 920. The transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, and so on. The processing unit may also be called a processor, a processing board, a processing module, a processing device, and so on. Optionally, the device for implementing the receiving function in the transceiving unit 910 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiving unit 910 can be regarded as the sending unit, that is, the transceiving unit 910 includes a receiving unit and a sending unit. The transceiver unit may sometimes be called a transceiver, a transceiver, or a transceiver circuit. The receiving unit may sometimes be called a receiver, a receiver, or a receiving circuit. The transmitting unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit.

It should be understood that the transceiving unit 910 is used to perform sending and receiving operations on the terminal device side in the foregoing method embodiment, and the processing unit 920 is used to perform other operations on the terminal device in the foregoing method embodiment except for the transceiving operation.

For example, in an implementation manner, the transceiver unit 910 is used to perform all sending operations and receiving operations of the terminal device in the embodiment shown in FIG. 3, such as S35 and S36, and/or the transceiver unit 910 is also used to perform support for text Other processes of the described technique. The processing unit 920 is used to perform all operations performed by the terminal device in the embodiment shown in FIG. 3 except for the receiving and sending operations, such as S32, S33, S34, and S37, and/or the processing unit 920 is also used to perform support Other processes of the technique described in this article.

When the communication device is a chip-type device or circuit, the device may include a transceiver unit and a processing unit. Wherein, the transceiving unit may be an input/output circuit and/or a communication interface; the processing unit is an integrated processor or a microprocessor or an integrated circuit.

When the communication device in this embodiment is a terminal device, the device shown in FIG. 10 can be referred to. As an example, the device can perform functions similar to the processor 610 in FIG. 6. In FIG. 10, the device includes a processor 1010, a data sending processor 1020, and a data receiving processor 1030. The processing module 510 in the foregoing embodiment may be the processor 1010 in FIG. 10 and complete corresponding functions; the transceiving module 520 in the foregoing embodiment may be the sending data processor 1020 in FIG. 10, and/or receiving data The processor 1030. Although the channel encoder and the channel decoder are shown in FIG. 10, it can be understood that these modules do not constitute a restrictive description of this embodiment, and are merely illustrative.

Fig. 11 shows another form of this embodiment. The processing device 1100 includes modules such as a modulation subsystem, a central processing subsystem, and a peripheral subsystem. The communication device in this embodiment can be used as the modulation subsystem therein. Specifically, the modulation subsystem may include a processor 1103 and an interface 1104. Among them, the processor 1103 completes the function of the aforementioned processing module 510, and the interface 1104 completes the function of the aforementioned transceiver module 520. As another variation, the modulation subsystem includes a memory 1106, a processor 1103, and a program stored in the memory 1106 and running on the processor. The processor 1103 executes the program on the terminal device side in the above method embodiment. Methods. It should be noted that the memory 1106 can be non-volatile or volatile, and its location can be located inside the modulation subsystem or in the processing device 1100, as long as the memory 1106 can be connected to the The processor 1103 is sufficient.

When the device in the embodiment of the present application is a network device, the device may be as shown in FIG. 12. The device 1200 includes one or more radio frequency units, such as a remote radio unit (RRU) 1210 and one or more baseband units (BBU) (also referred to as digital units, digital units, DU) 1220 . The RRU 1210 may be called a transceiver module, which corresponds to the transceiver module 720 in FIG. 7. Optionally, the transceiver module may also be called a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 1211 and a radio frequency unit 1212. The RRU1210 part is mainly used for receiving and sending radio frequency signals and converting radio frequency signals and baseband signals, for example, for sending instruction information to terminal equipment. The BBU1210 part is mainly used for baseband processing, control of the base station, and so on. The RRU 1210 and the BBU 1220 may be physically set together, or may be physically separated, that is, a distributed base station.

The BBU 1220 is the control center of the base station, and may also be called a processing module, which may correspond to the processing module 720 in FIG. 7, and is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spreading. For example, the BBU (processing module) may be used to control the base station to execute the operation procedure of the network device in the foregoing method embodiment, for example, to generate the foregoing indication information.

In an example, the BBU 1220 may be composed of one or more single boards, and multiple single boards may jointly support a radio access network with a single access standard (such as an LTE network), or support different access standards. Wireless access network (such as LTE network, 5G network or other networks). The BBU 1220 also includes a memory 1221 and a processor 1222. The memory 1221 is used to store necessary instructions and data. The processor 1222 is used to control the base station to perform necessary actions, for example, used to control the base station to execute the operation procedure of the network device in the foregoing method embodiment. The memory 1221 and the processor 1222 may serve one or more single boards. In other words, the memory and processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.

The embodiment of the present application provides a communication system. The communication system may include at least one terminal device involved in the embodiment shown in FIG. 3 and a network device involved in the embodiment shown in FIG. 3 mentioned above. The terminal device is, for example, the communication device 500 in FIG. 5 or the communication device 600 in FIG. 6. For example, the terminal device can be used to perform all operations performed by the terminal device in the embodiment shown in FIG. 3, such as: S32 to S37 in the embodiment shown in FIG. 3, and/or used to support the technology described herein Other processes. The network device can be used to perform all operations performed by the network device in the embodiment shown in FIG. 3, for example: S31 to S34 and S37 in the embodiment shown in FIG. 3, and/or used to support the technology described herein Other processes.

The embodiments of the present application also provide a computer-readable storage medium, which is used to store a computer program. When the computer program is executed by a computer, the computer can implement the method shown in FIG. 3 provided by the above-mentioned method embodiment. The process related to the terminal device in the embodiment.

The embodiments of the present application also provide a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a computer, the computer can implement the method shown in FIG. 3 provided by the foregoing method embodiment. The process related to the network device in the embodiment.

The embodiment of the present application also provides a computer program product, the computer program product is used to store a computer program, when the computer program is executed by a computer, the computer can implement the embodiment shown in FIG. 3 provided by the above method embodiment Processes related to terminal equipment.

The embodiment of the present application also provides a computer program product, the computer program product is used to store a computer program, when the computer program is executed by a computer, the computer can implement the embodiment shown in FIG. 3 provided by the above method embodiment Processes related to network equipment.

It should be understood that the processor mentioned in the embodiments of this application may be a CPU, or other general-purpose processors, digital signal processors (digital signal processors, DSP), application specific integrated circuits (ASICs), ready-made Field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), and synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) ) And direct memory bus random access memory (direct rambus RAM, DR RAM).

It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, the memory (storage module) is integrated in the processor.

It should be noted that the memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.

It should be understood that in the various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application. The implementation process constitutes any limitation.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

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

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disks or optical disks and other media that can store program codes. .

The above are only specific implementations of the application, but the scope of protection of the embodiments of the application is not limited thereto. Any person skilled in the art can easily think of changes within the technical scope disclosed in the embodiments of the application. Or replacement should be covered within the protection scope of the embodiments of this application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.

Claims

A communication method, characterized in that it comprises:

Send the random access preamble to the network device in the first time unit;

Determining the start time of the time window according to the reference signal received power RSRP, wherein the start time of the time window is located after the end time of the first time unit in the time domain; and

Starting to detect a random access response in response to the random access preamble at the starting moment.
The method of claim 1, wherein:

In the case that the RSRP is greater than or equal to the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit is equal to a first value; or,

In the case that the RSRP is less than the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit is equal to the sum of the first value and the offset value;

Wherein, the first value and the offset value are both greater than zero.
The method according to claim 2, wherein the method further comprises:

Receiving first indication information from the network device, where the first indication information is used to indicate the offset value.
The method of claim 1, wherein:

In the case that the RSRP is greater than or equal to the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit is equal to a first value; or,

In the case that the RSRP is less than the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit is equal to a fourth value;

Wherein, the first value and the fourth value are both greater than zero.
The method according to claim 4, wherein the method further comprises:

Receiving first indication information from the network device, where the first indication information is used to indicate the fourth value.
The method according to any one of claims 1 to 5, characterized in that:

The random access wireless network temporary identifier corresponding to the random access response is related to the RSRP.
The method of claim 6, wherein:

In the case that the RSRP is greater than or equal to the RSRP threshold, the temporary identification of the random access wireless network is the second value; or,

In the case that the RSRP is less than the RSRP threshold, the temporary random access wireless network identifier is a third value;

Wherein, the second value is different from the third value.
The method according to claim 2, 3, 4, 5 or 7, wherein the method further comprises:

Receiving second indication information from the network device, where the second indication information is used to indicate the RSRP threshold.
The method according to any one of claims 1 to 8, wherein the method further comprises:

Receiving a first signal from the network device, where the first signal includes a synchronization signal or a reference signal;

The first signal is measured to obtain the RSRP.
A communication method, characterized in that it comprises:

Determining an offset value, where the offset value is used by the terminal device to determine a time window for receiving a random access response from the network device when the reference signal received power RSRP is less than the RSRP threshold;

Sending first indication information to the terminal device, where the first indication information is used to indicate the offset value.
The method according to claim 10, wherein the method further comprises:

Sending second indication information to the terminal device, where the second indication information is used to indicate the RSRP threshold.
The method according to claim 10 or 11, wherein:

Receive the random access preamble from the terminal device in the first time unit;

Send a random access response to the terminal device in a second time unit in the time window, wherein the start time of the time window is located after the end time of the first time unit in the time domain.
A communication device, characterized in that it comprises:

The transceiver module is used to send the random access preamble to the network device in the first time unit;

A processing module, configured to determine the start time of the time window according to the reference signal received power RSRP, wherein the start time of the time window is located after the end time of the first time unit in the time domain; and

The transceiver module is further configured to start detecting a random access response in response to the random access preamble at the starting moment.
The communication device according to claim 13, wherein:

In the case that the RSRP is greater than or equal to the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit is equal to a first value; or,

In the case that the RSRP is less than the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit is equal to the sum of the first value and the offset value;

Wherein, the first value and the offset value are both greater than zero.
The communication device according to claim 14, wherein the transceiver module is further configured to receive first indication information from the network device, and the first indication information is used to indicate the offset value.
The communication device according to claim 13, wherein:

In the case that the RSRP is greater than or equal to the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit is equal to a first value; or,

In the case that the RSRP is less than the RSRP threshold, the time difference between the start time of the time window and the end time of the first time unit is equal to a fourth value;

Wherein, the first value and the fourth value are both greater than zero.
The communication device according to claim 16, wherein the transceiver module is further configured to receive first indication information from the network device, and the first indication information is used to indicate the fourth value.
The communication device according to any one of claims 13 to 17, characterized in that:

The random access wireless network temporary identifier corresponding to the random access response is related to the RSRP.
The communication device according to claim 18, wherein:

In the case that the RSRP is greater than or equal to the RSRP threshold, the temporary identification of the random access wireless network is the second value; or,

In the case that the RSRP is less than the RSRP threshold, the temporary random access wireless network identifier is a third value;

Wherein, the second value is different from the third value.
The communication device according to claim 14, 15, 16, 17 or 19, wherein the transceiver module is further configured to receive second indication information from the network device, and the second indication information is used for Indicates the RSRP threshold.
The communication device according to any one of claims 13 to 20, wherein:

The transceiver module is further configured to receive a first signal from the network device, where the first signal includes a synchronization signal or a reference signal;

The processing module is further configured to measure the first signal to obtain the RSRP.
A network device, characterized in that it comprises:

A processing module, configured to determine an offset value, where the offset value is used for the terminal device to determine a time window for receiving a random access response from the network device when the reference signal received power RSRP is less than the RSRP threshold;

The transceiver module is configured to send first indication information to the terminal device, where the first indication information is used to indicate the offset value.
The network device according to claim 22, wherein the transceiver module is further configured to send second indication information to the terminal device, and the second indication information is used to indicate the RSRP threshold.
The network device according to claim 22 or 23, wherein the transceiver module is further configured to:

Receive the random access preamble from the terminal device in the first time unit;

Send a random access response to the terminal device in a second time unit in the time window, wherein the start time of the time window is located after the end time of the first time unit in the time domain.
A communication system, characterized by comprising the communication device according to any one of claims 13-21, and the network equipment according to any one of claims 22-24.
A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program runs on a computer, the computer executes any one of claims 1-9 The method, or the computer is caused to execute the method according to any one of claims 10-12.
A chip system, characterized in that, the chip system includes:

Communication interface, used to communicate with other devices;

The processor is configured to make the communication device installed with the chip system execute the method according to any one of claims 1-9, or make the communication device execute the method according to any one of claims 10-12 Methods.
A computer program product, characterized in that the computer program product comprises a computer program, when the computer program runs on a computer, the computer is caused to execute the method according to any one of claims 1-9, or The computer executes the method according to any one of claims 10-12.