CN113826436A

CN113826436A - Communication method, device and equipment

Info

Publication number: CN113826436A
Application number: CN201980096401.2A
Authority: CN
Inventors: 谢信乾; 郭志恒; 费永强; 毕文平
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2021-12-21
Also published as: WO2021051364A1

Abstract

The application relates to a communication method, a communication device and communication equipment. A random access preamble is transmitted to a network device within a first time unit. Determining a starting time of a time window according to RSRP, and starting to detect a random access response responding to the random access preamble at the starting time. Wherein a start time of the time window is temporally located after an end time of the first time unit. In the embodiment of the application, the terminal device at the edge of the cell may delay a period of time to receive the random access response, and because the network device may also delay a period of time when sending the random access response to the terminal device at the edge of the cell, the terminal device receives the random access response after delaying, and the success rate of receiving the random access response can be improved.

Description

Communication method, device and equipment

Technical Field

The present application relates to the field of mobile communications technologies, and in particular, to a communication method, apparatus and device.

Background

For a cellular wireless communication network such as a new radio interface (NR) or a Long Term Evolution (LTE) in a fifth generation mobile communication technology (5G), a method of adding an intermediate node may be adopted to improve performance of a cell edge, and such an intermediate node is generally called a relay (relay). For example, if the terminal device is located at the edge of the cell, the distance between the terminal device and the network device is 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 may be forwarded by the relay, that is, the terminal device first sends the uplink signal to the relay, and the relay forwards the received uplink signal to the network device, so that the network device can receive the signal from the terminal device. For downlink communication, however, the terminal device may receive the downlink communication directly from the network device without relaying the downlink communication.

When the terminal device performs random access, a random access preamble (preamble) is sent 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 RAR within a period of time, which is generally referred to as RAR window (RAR window). The start time of the RAR receive window is protocol predefined.

However, for the relay scenario, the random access preamble sent by the terminal device at the cell edge is forwarded to the network device through the relay, so that the time when the random access preamble reaches the network device is longer than the time when the random access preamble is sent by the terminal device in the non-relay scenario, and thus the time resource where the RAR sent by the network device is located is also longer than the time when the RAR is not sent by the network device, and the time delay may exceed the time length of the RAR receiving window. If the configuration of the RAR receiving window as described above is still adopted, the terminal device cannot receive RAR.

Disclosure of Invention

The embodiment of the application provides a communication method, a communication device and communication equipment, which are used for improving the success rate of terminal equipment for receiving RAR.

In a first aspect, a first communication method is provided, the method including: sending a random access preamble to network equipment in a first time unit; determining a starting time of a time window according to RSRP, wherein the starting time of the time window is located after an ending time of the first time unit in a 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 network equipment in a first time unit; detecting a random access response in response to the random access preamble starting at a starting time of a time window, wherein the starting time of the time window is determined according to RSRP, and the starting time of the time window is located after an ending time of the first time unit in a time domain.

The method may be performed by a first communication device, which may be a communication apparatus or a communication device, such as a system-on-a-chip, capable of supporting the communication apparatus to implement the functionality required for the method. Illustratively, the first communication device is a terminal device, or a chip system provided in the terminal device for implementing the function of the terminal device, or other components for implementing the function of the terminal device. In the following description, the first communication device is taken as an example of a terminal device.

In this embodiment of the application, the terminal device may determine, according to the RSRP, a starting time of a time window for the terminal device to receive the random access response, so that, because the RSRP of the terminal device at the edge of the cell is different from the RSRP of the terminal device at the center of the cell, the starting times of the time windows for the terminal devices at different positions to receive the random access response may be different. For example, the starting time of the time window determined by the terminal device at the edge of the cell may be later than the starting time of the time window for receiving the random access response determined by the terminal device at the center of the cell, so that, compared to the terminal device at the center of the cell, the terminal device at the edge of the cell may delay a period of time to receive the random access response, and since the network device may also delay a period of time when sending the random access response to the terminal device at the edge of the cell, the terminal device may delay receiving the random access response, and the success rate of receiving the random access response may be improved.

Optionally, in a case that the RSRP is greater than or equal to an RSRP threshold, a time difference between a start time of the time window and an end time of the first time unit is equal to a first value; or, in case the RSRP is less than an RSRP threshold, a time difference between a start time of the time window and an end time of the first time unit is equal to a sum of a first value and an offset value. Wherein the first value and the offset value are both greater than 0.

Or, optionally, when the RSRP is greater than or equal to an RSRP threshold, a time difference between a start time of the time window and an end time of the first time unit is equal to a first value; or, in case the RSRP is less than an RSRP threshold, a time difference between a start time of the time window and an 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 0.

The RSRP is greater than or equal to the RSRP threshold, indicating that the terminal device may be located at the cell center, or not located at the cell edge. In this case, the terminal device may send the uplink signal to the network device directly without relaying, so that the time for the network device to send the random access response to the terminal device may be earlier, and therefore, if the RSRP is greater than or equal to 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 first value.

And the RSRP is less than the RSRP threshold value, the terminal equipment can be positioned at the edge of a cell. In this case, the terminal device may transmit the uplink signal to the network device through the relay, and the time for the network device to transmit the random access response to such terminal device may be later. Thus, 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 a fourth value, e.g. the fourth value is greater than the first value. Compared with the terminal equipment which does not use the relay to send the uplink signal, the terminal equipment which uses the relay can delay to detect the random access response, and the success rate of the terminal equipment for receiving the random access response can be improved.

Optionally, the method further includes:

receiving first indication information from the network device, wherein the first indication information is used for indicating the offset value.

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

Optionally, the offset value may be determined by negotiation between the network device and the terminal device, or the offset value may be specified by a protocol, and in short, the network device and the terminal device may be consistent.

If the offset value is determined by negotiation between the network device and the terminal device or specified 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, wherein the first indication information is used for indicating the fourth value.

The fourth value may be that the network device is configured to the terminal device. Alternatively, the fourth value may be determined by negotiation between the network device and the terminal device, or the fourth value may be defined by a protocol, and in short, the network device and the terminal device may be consistent.

If the fourth value is determined by negotiation between the network device and the terminal device or specified 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 radio network temporary identifier corresponding to the random access response is related to the RSRP.

In the random access phase, the network device cannot acquire the identifier of the terminal device, so that the random access preamble sent by the network device includes a random access radio network temporary identifier associated with a resource location adopted by the random access preamble sent by the terminal device, and the random access radio network temporary identifier is used for allowing the terminal device to identify whether the received random access preamble corresponds to the terminal device. For example, the time resources and the frequency resources of the random access preambles sent by the terminal device 1 at the cell edge and the terminal device 2 at the cell center are the same, and since the random access preamble of the terminal device 1 is forwarded to the network device through the relay, the network device receives the two random access preambles from the terminal device 1 and the terminal device 2, respectively. For example, the cell has only one uplink carrier, if the value of the random access radio network temporary identifier of the terminal device 1 obtained by calculation is the same as the value of the random access radio network temporary identifier of the terminal device 2 according to the current calculation method of the random access radio network temporary identifier, at this time, the terminal device 1 may mistakenly consider the random access preamble sent by the network device to the terminal device 2 as the random access preamble of the terminal device 1, so that a communication error occurs. The RSRP measured by a terminal device at different locations may be different. For this reason, in the embodiment of the present application, the random access radio network temporary identifier may be related to RSRP, for example, if RSRP is different, the random access radio network temporary identifier is different. Therefore, the terminal devices with different RSRP can respectively determine the corresponding temporary random access wireless network identifiers, the temporary random access wireless network identifiers corresponding to other terminal devices are prevented from being mistaken as own, and the probability of communication errors is reduced.

Optionally, the random access radio network temporary identifier is a second value when the RSRP is greater than or equal to an RSRP threshold; or, when the RSRP is less than the RSRP threshold, the random access radio network temporary identifier is a 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 radio network temporary identifier is a second value; or, the random access radio network temporary identity is a third value if the RSRP is less than or equal to an RSRP threshold. 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 time difference between the start time of the time window and the end time of the first time unit may also be equal to the sum of the first value and the offset value.

In this embodiment of the application, for a terminal device whose measured RSRP is less than (or equal to) the RSRP threshold, the value of the identifier of the uplink carrier corresponding to the terminal device may be a third value, and for a terminal device whose measured RSRP is greater than (or equal to) the RSRP threshold, the value of the identifier of the uplink carrier corresponding to the terminal device may be a second value, where the second value is different from the third value. In this way, the values of the temporary identifiers of the random access wireless networks corresponding to different terminal devices (or terminal devices at different positions) are different, so that the terminal devices can correctly identify the corresponding random access responses, and the phenomenon of communication errors is avoided. For example, the second value may be 0, and the third value may not be 0.

Optionally, the method further includes: receiving second indication information from the network device, wherein the second indication information is used for indicating the RSRP threshold value.

The RSRP threshold may be configured by the network device to the terminal device. Alternatively, the RSRP threshold may be determined by a network device and a terminal device negotiation, or may be specified by a protocol.

In summary, the network device and the terminal device can be kept consistent. If the RSRP threshold is determined through negotiation between the network device and the terminal device, or is specified through 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, the first signal comprising a synchronization signal or a reference signal. And measuring the first signal to obtain the RSRP.

For example, the terminal device may obtain RSRP through measurement, and may compare the RSRP with an RSRP threshold to determine a starting 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 a terminal device to determine a time window for receiving a random access response from a network device if RSRP is smaller than an RSRP threshold; and sending first indication information to the terminal equipment, wherein the first indication information is used for indicating the deviation value.

Alternatively, the method of the second aspect comprises: determining a fourth value, wherein the fourth value is used for determining a time window for the terminal device to receive the random access response from the network device when the RSRP is smaller than the RSRP threshold; and sending first indication information to the terminal equipment, wherein the first indication information is used for indicating the fourth value.

The method may be performed by a second communication device, which may be a communication apparatus or a communication device capable of supporting a communication apparatus to implement the functions required by the method, such as a system-on-a-chip. Illustratively, the second communication device is a network device, or a system-on-chip provided in the network device for implementing the functions of the network device, or other components for implementing the functions of the network device. In the following description, the second communication device is taken as an example of a network device.

The terminal device at the cell edge generally needs to forward through the relay when sending the uplink signal, and the terminal device at the cell center generally does not need the relay when sending the uplink signal and can directly send the uplink signal. If the terminal devices detect within the same time window, the random access response sent by the network device to the terminal device at the cell edge may not fall within the time window detected by the terminal device.

While terminal devices in different locations of the cell may have different measured RSRP. Therefore, in order to improve the success rate of the terminal device at the cell edge for receiving the random access response, in the embodiment of the present application, the network device may determine an offset value or a fourth value, where the offset value or the fourth value may be used for the terminal device to determine a time window for receiving the random access response from the network device if RSRP is smaller than an RSRP threshold, and if RSRP is smaller than the RSRP threshold, the terminal device is likely to be at the cell edge, and therefore, the offset value or the fourth value may be used for the terminal device whose RSRP is smaller than the RSRP threshold to determine the time window for receiving the random access response from the network device. By the offset value or the fourth value, the starting time of the time window for receiving the random access response determined by the terminal device at the edge of the cell may be delayed with respect to the starting time of the time window for receiving the random access response determined by the terminal device at the center of the cell, that is, the terminal device at the edge of the cell may delay a period of time to receive the random access response with respect to the terminal device at the center of the cell, because the network device may also delay a period of time when sending the random access response to the terminal device at the edge of the cell, the terminal device may delay receiving the random access response, and the success rate of receiving the random access response may be improved.

With reference to the second aspect, in one possible implementation manner of the second aspect, the method further includes: and sending second indication information to the terminal equipment, wherein the second indication information is used for indicating the RSRP threshold value.

The RSRP threshold may be configured by the network device to the terminal device. Alternatively, the RSRP threshold may be determined by negotiation between the network device and the terminal device, or may be specified by a protocol.

In combination with the second aspect, in one possible embodiment of the second aspect,

receiving a random access preamble from the terminal device within a first time unit;

and sending a random access response to the terminal equipment in a second time unit in the time window, wherein the starting time of the time window is positioned after the ending 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 with the measured RSRP smaller than the RSRP threshold may determine the starting time of the time window for receiving the random access response according to the offset value or the fourth value. The network device may also send the random access response within the time window when sending the random access response to the terminal device located at the cell edge. And the terminal equipment with the measured RSRP smaller than the RSRP threshold value may be the terminal equipment at the edge of the cell. Therefore, according to the technical scheme provided by the embodiment of the application, the terminal device with the measured RSRP being less than the RSRP threshold value can detect the random access response in the time window, and the success rate of the terminal device at the cell edge for receiving the random access response is improved.

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 perform the method of the first aspect or any possible implementation manner of the first aspect. In particular, the first communication device may comprise means for performing the method of the first aspect or any of its possible implementations, for example comprising processing means and transceiver means. Illustratively, the first communication device is a communication device, or a chip or other component provided in the communication device. Illustratively, the communication device is a terminal device. In the following, the first communication apparatus is exemplified as a terminal device. For example, the transceiver module may be implemented by a transceiver, and the processing module may be implemented by a processor. If the first communication means is a communication device, the transceiver is implemented, for example, by an antenna, a feeder, a codec, etc. in the communication device. Alternatively, if the first communication device is a chip disposed in the communication apparatus, the transceiver is, for example, a communication interface in the chip, and the communication interface is connected to a radio frequency transceiver component in the communication apparatus to implement transceiving of information through the radio frequency transceiver component. In the introduction process of the third aspect, the description is continued by taking the processing module and the transceiver module as an example. Wherein the content of the first and second substances,

the receiving and sending module is used for sending a random access preamble to the network equipment in a first time unit;

the processing module is configured to determine a starting time of a time window according to reference signal received power RSRP, where the starting time of the time window is located after an ending time of the first time unit in a 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 time.

Alternatively, the first and second electrodes may be,

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

With reference to the third aspect, in one possible implementation manner of the third aspect,

the time difference between the starting time of the time window and the ending time of the first time unit is equal to a first value if the RSRP is greater than or equal to an RSRP threshold; or the like, or, alternatively,

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

wherein the first value and the offset value are both greater than 0.

in the case that the RSRP is less than an RSRP threshold, a time difference between a start time of the time window and an 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 0.

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 offset 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 fourth value.

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

the random access wireless network temporary identification is a second value when the RSRP is larger than or equal to an RSRP threshold value; or the like, or, alternatively,

the random access wireless network temporary identification is a third value when the RSRP is smaller than the RSRP threshold 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.

With regard to the technical effects of the third aspect or of various possible embodiments of the third aspect, reference may be made to the introduction of the technical effects of the respective embodiments of the first aspect or 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 adapted to perform the method of the second aspect or any possible implementation of the second aspect. In particular, the third communication device may comprise means for performing the method of the second aspect or any of its possible embodiments, for example comprising processing means and transceiver means. Illustratively, the second communication device is a communication device, or a chip or other component provided in the communication device. Illustratively, the communication device is a network device. In the following, the second communication device is taken as an example of a network device. For example, the transceiver module may be implemented by a transceiver, and the processing module may be implemented by a processor. If the second communication means is a communication device, the transceiver is implemented, for example, by an antenna, a feeder, a codec, etc. in the communication device. Or, if the second communication device is a chip disposed in the communication apparatus, the transceiver is, for example, a communication interface in the chip, and the communication interface is connected with a radio frequency transceiving component in the communication apparatus to implement transceiving of information through the radio frequency transceiving component. In the introduction of the fourth aspect, the description continues by taking the processing module and the transceiver module as an example. Wherein the content of the first and second substances,

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

Alternatively, the first and second electrodes may be,

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

With regard to the technical effects of the fourth aspect or of the various possible embodiments of the fourth aspect, reference may also be made to the introduction to the technical effects of the second aspect or of the various possible embodiments of the second aspect.

In a fifth aspect, a communication device is provided, for example a first communication device as described above. The communication device includes a processor. Optionally, a memory may also be included for storing the computer instructions. The processor and the memory are coupled to each other for implementing the method as described in the first aspect or in the various possible embodiments of the first aspect. Alternatively, the first communication device may not include the 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 apparatuses. The processor, the memory and the communication interface are coupled to each other for implementing the method as described in the first aspect or in various possible embodiments of the first aspect. The processor, for example, when executing the computer instructions stored by the memory, causes the first communication device to perform the method of the first aspect or any one of the possible implementations of the first aspect. Illustratively, the first communication device is a communication device, or a chip or other component provided in the communication device. Illustratively, the communication device is a terminal device. In the following, the first communication apparatus is exemplified as a terminal device. Wherein, if the first communication means is a communication device, the communication interface is implemented, for example, by a transceiver in the communication device, for example, the transceiver is implemented by an antenna, a feeder, a codec, and the like in the communication device. Or, if the first communication device is a chip disposed in the communication apparatus, the communication interface is, for example, an input/output interface, such as an input/output pin, of the chip, and the communication interface is connected to a radio frequency transceiving component in the communication apparatus to implement transceiving of information through the radio frequency transceiving component. Wherein the content of the first and second substances,

the memory to store computer instructions;

the communication interface is used for sending a random access preamble to the network equipment in a first time unit;

the processor is configured to execute the computer instructions stored in the memory and determine a starting time of a time window according to reference signal received power RSRP, wherein the starting time of the time window is located after an ending time of the first time unit in a time domain; and

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

Alternatively, the first and second electrodes may be,

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

With reference to the fifth aspect, in one possible implementation of the fifth aspect,

wherein the first value and the offset value are both greater than 0.

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 offset value.

With reference to the fifth aspect, in a possible implementation manner of the fifth aspect, the random access radio 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, where 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.

With regard to the technical effects of the fifth aspect or of various possible embodiments of the fifth aspect, reference may be made to the introduction to the technical effects of the respective embodiments of the first aspect or of the first aspect.

A sixth aspect provides a communication device, for example a second communication device as described above. The communication device includes a processor. Optionally, a memory may also be included. The processor and the memory are coupled to each other for implementing the method as described in the second aspect or in various possible embodiments 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 apparatuses. The processor, the memory and the communication interface are coupled to each other for implementing the method as described in the second aspect or in various possible embodiments of the second aspect. The processor, for example, when executing the computer instructions stored by the memory, causes the second communication device to perform the method of the second aspect or any one of the possible embodiments of the second aspect. Illustratively, the second communication device is a communication device, or a chip or other component provided in the communication device. Illustratively, the communication device is a network device. In the following, the second communication device is taken as an example of a network device. Wherein, if the second communication means is a communication device, the communication interface is implemented, for example, by a transceiver in the communication device, for example, by an antenna, a feeder, a codec, etc. in the communication device. Or, if the second communication device is a chip disposed in the communication apparatus, the communication interface is, for example, an input/output interface, such as an input/output pin, of the chip, and the communication interface is connected to a radio frequency transceiving component in the communication apparatus to realize transceiving of information through the radio frequency transceiving component. Wherein the content of the first and second substances,

the memory to store computer instructions;

the processor configured to execute the computer instructions stored by the memory, determine an offset value, wherein the offset value is used for a terminal device to determine a time window for receiving a random access response from a network device if a reference signal received power, RSRP, is less than an RSRP threshold;

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 configured to:

With regard to the technical effects of the sixth aspect or of the various possible embodiments of the sixth aspect, reference may also be made to the introduction to the technical effects of the second aspect or of the various possible embodiments of the second aspect.

In a seventh aspect, there is provided a communication system comprising the communication apparatus of the third aspect or the communication apparatus of the fifth aspect, and comprising the communication apparatus of the fourth aspect or the communication apparatus of the sixth aspect.

In an eighth aspect, a computer-readable storage medium is provided, which is used for storing computer instructions, and when the computer instructions are executed on a computer, the computer is caused to execute the method of the first aspect or any one of the possible implementation manners of the first aspect.

In a ninth aspect, there is provided a computer readable storage medium for storing computer instructions which, when executed on a computer, cause the computer to perform the method of the second aspect or any one of the possible implementations of the second aspect.

A tenth aspect provides a computer program product comprising instructions for storing computer instructions that, when executed on a computer, cause the computer to perform the method of the first aspect or any one of the possible implementations of the first aspect.

In an eleventh aspect, there is provided a computer program product comprising instructions for storing computer instructions which, when executed on a computer, cause the computer to perform the method of the second aspect or any one of the possible implementations of the second aspect.

In the embodiment of the application, the terminal device at the edge of the cell may delay a period of time to receive the random access response, and because the network device may also delay a period of time when sending the random access response to the terminal device at the edge of the cell, the terminal device receives the random access response after delaying, and the success rate of receiving the random access response can be improved.

Drawings

FIG. 1 is a schematic diagram of a relay scenario;

fig. 2 is a schematic view of an application scenario according to an embodiment of the present application;

fig. 3 is a flowchart of a communication method according to an embodiment of the present application;

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

fig. 5 is a schematic block diagram of a terminal device provided in an embodiment of the present application;

fig. 6 is another schematic block diagram of a terminal device provided in an embodiment of the present application;

fig. 7 is a schematic block diagram of a network device provided in an embodiment of the present application;

fig. 8 is another schematic block diagram of a network device provided in an embodiment of the present application;

fig. 9 is a schematic block diagram of a communication device provided in an embodiment of the present application;

fig. 10 is another schematic block diagram of a communication device provided by an embodiment of the present application;

fig. 11 is a further schematic block diagram of a communication device provided in an embodiment of the present application;

fig. 12 is a further schematic block diagram of a communication device provided in an embodiment of the present application.

Detailed Description

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

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

1) Terminal equipment, including equipment providing voice and/or data connectivity to a user, in particular, including equipment providing voice to a user, or including equipment providing data connectivity to a user, or including equipment providing voice and data connectivity to a user. For example, may include a handheld device having wireless connection capability, or a processing device connected to a wireless modem. The terminal device may communicate with a core network via a Radio Access Network (RAN), exchange voice or data with the RAN, or interact with the RAN. The terminal device may include a User Equipment (UE), a wireless terminal device, a mobile terminal device, a device-to-device communication (D2D) terminal device, a vehicle-to-all (V2X) terminal device, a machine-to-machine/machine-type communication (M2M/MTC) terminal device, an internet of things (internet of things) terminal device, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile station), a remote station (remote station), an access point (access point, AP), a remote terminal (remote), an access terminal (access terminal), a user terminal (user terminal), a user agent (user), or a user equipment (user), etc. For example, mobile telephones (or so-called "cellular" telephones), computers with mobile terminal equipment, portable, pocket, hand-held, computer-included mobile devices, and the like may be included. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. Also included are constrained devices, such as devices that consume less power, or devices that have limited storage capabilities, or devices that have limited computing capabilities, etc. Examples of information sensing devices include bar codes, Radio Frequency Identification (RFID), sensors, Global Positioning Systems (GPS), laser scanners, and the like.

By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable equipment can also be called wearable smart device or intelligent wearable equipment etc. is the general term of using wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets, smart helmets, smart jewelry and the like for monitoring physical signs.

The various terminal devices described above, if located on a vehicle (e.g., placed in or installed in the vehicle), may be considered to be vehicle-mounted terminal devices, which are also referred to as on-board units (OBUs), for example.

In the embodiment of the present application, it can also be understood that all devices capable of performing data communication with a base station may be regarded as terminal devices.

2) Network devices, including, for example, Access Network (AN) devices, such as base stations (e.g., access points), may refer to devices in AN access network that communicate with wireless terminal devices over one or more cells over the air, or, for example, a network device in vehicle-to-all (V2X) technology is a Road Side Unit (RSU). The base station may be configured to interconvert received air frames and IP packets as a router between the terminal device and the rest of the access network, which may include an IP network. The RSU may be a fixed infrastructure entity supporting the V2X application and may exchange messages with other entities supporting the V2X application. The network device may also coordinate attribute management for the air interface. For example, the network device may include an evolved Node B (NodeB) or eNB or e-NodeB in an LTE system or an LTE-a (long term evolution-advanced, LTE-a), or may also include a next generation Node B (gNB) in a 5G NR system (also referred to as NR system for short), or may also include a Centralized Unit (CU) and a Distributed Unit (DU) in a Cloud access network (Cloud RAN) system, which is not limited in the embodiments of the present application.

3) For the cellular wireless communication network such as NR or LTE, the performance of the cell edge can be improved by adding an intermediate node, which is generally called relay, or called relay node, relay device or relay equipment. The relay may be used to receive signals from the terminal device and to forward the received signals from the terminal device to the network device. The relay may be implemented by a terminal device, or may also be implemented by a network device, for example, by a wireless Access Point (AP).

4) The time unit may be, for example, a slot (slot) or a subframe (subframe), or may be another time unit. For example, the first time unit may refer to a first slot or a first subframe.

5) A slot, in the NR system, includes 14 Orthogonal Frequency Division Multiplexing (OFDM) symbols, for example, a slot length corresponding to a 15kHz subcarrier interval is 1ms, and a slot length corresponding to a 30kHz subcarrier interval is 0.5 ms.

6) The terms "system" and "network" in the embodiments of the present application may be used interchangeably. "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

And, unless stated to the contrary, the embodiments of the present application refer to the ordinal numbers "first", "second", etc., for distinguishing a plurality of objects, and do not limit the sequence, timing, priority, or importance of the plurality of objects. For example, the first value and the second value are merely used to distinguish different values, and do not indicate a difference in content, priority, importance, or the like between the two values.

The foregoing has described some of the noun concepts to which embodiments of the present application relate, and the following has described some features of the embodiments of the present application.

For NR or LTE cellular wireless communication networks, it may employ methods of adding intermediate nodes, often referred to as relays, to improve cell edge performance. Considering that the transmission power of the network device is often much larger than that of the terminal device, the downlink transmission performance from the network device to the terminal device is usually better than the uplink transmission performance from the terminal device to the network device. Therefore, the main role of the relay may be to improve the uplink performance of the terminal devices at the cell edge.

Fig. 1 can be referred to as a relay scenario. In fig. 1, the network device is, for example, a gNB, the terminal device 1 is located at the edge of a cell, and the terminal device 2 is located at the center of the cell. The terminal device 2 may directly perform uplink communication or downlink communication with the network device because the distance between the terminal device 2 and the network device is short, whereas the terminal device 1 needs to forward the uplink communication of the terminal device 1 through the relay because the distance between the terminal device 1 and the network device is long, that is, the terminal device 1 first sends the uplink signal to the relay, and the relay forwards the uplink signal received by the terminal device 1 to the network device, so that the network device can receive the uplink signal from the terminal device 1. For downlink communication, however, the terminal device 1 may receive the downlink signal directly from the network device without forwarding through a relay.

At present, when a terminal device performs random access, a preamble needs to be sent to a network device first, and after the network device receives the preamble, an RAR needs to be sent to the terminal device. On one hand, after the terminal device sends the preamble, it will try to detect the RAR within a period of time, which is usually referred to as a RAR receiving window. The start time of the RAR receiving window is predefined by a protocol, for example, referred to as a preset start time, and is generally a start time of an nth time unit after the terminal device has sent the preamble, and the time length of the RAR receiving window is configured by the network device, for example, the network device sends an indication message (for example, in an NR system, the indication message may be implemented by a ra-response window (ra-response window) command word) for configuring the time length of the RAR receiving window, where the unit of the time length is generally a time unit. The time unit is, for example, a subframe or a slot.

On the other hand, in the random access phase, the network device cannot acquire the identifier of the terminal device yet, so the RAR sent by the network device includes an identifier associated with a resource location used by the preamble sent by the terminal device, which is referred to as a random access-radio network temporary identifier (RA-RNTI), where the RA-RNTI is used for enabling the terminal device to identify whether the received RAR corresponds to the terminal device. The calculation mode of the 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)

Wherein s is_idAnd t_idRelated to the number of time resource the preamble is located in. f. of_idIn relation to the frequency domain resource number of the preamble, the frequency domain resource may be at a Physical Resource Block (PRB) level, for example, 6 PRBs may be regarded as one frequency domain resource. ul_{carrier_id}In relation to the number of the carrier where the preamble is located, ul is given in the case that there is only one uplink carrier in a cell_{carrier_id}Is 0.

For a relay scenario, a random access preamble sent by a terminal device at a cell edge is forwarded to a network device through a relay, so that a time when the random access preamble reaches the network device is delayed by a relatively large time compared with a random access preamble sent by a terminal device in a non-relay scenario, and thus a time resource of an RAR sent by the network device is also delayed by a relatively large time compared with the non-relay scenario, and the time delay may exceed a time length of an RAR receiving window. If the configuration of the RAR receiving window as described above is still adopted, the terminal device cannot receive RAR.

In view of this, the technical solutions of the embodiments of the present application are provided. In this embodiment of the present application, the terminal device may determine, according to the RSRP, a starting time of a time window for the terminal device to receive the random access response, so that, because the RSRP of the terminal device at the edge of the cell is different from the RSRP of the terminal device at the center of the cell, the starting times of the time windows for the terminal devices at different positions to receive the random access response may be different. For example, the starting time of the time window determined by the terminal device at the cell edge may be later than the starting time of the time window for receiving the random access response determined by the terminal device at the cell center, and therefore, compared to the terminal device at the cell center, the terminal device at the cell edge may delay a period of time to receive the random access response, and since the network device may also delay a period of time when sending the random access response to the terminal device at the cell edge, the terminal device may delay receiving the random access response, and the success rate of receiving the random access response may be improved.

An application scenario of the embodiment of the present application may be a relay scenario, and refer to fig. 2. Fig. 2 includes a network device, a relay, and a terminal device. The uplink communication of the terminal device needs to be forwarded through the relay, that is, the terminal device sends the uplink signal to the relay, and the relay forwards the uplink signal received by the terminal device to the network device, so that the network device can receive the uplink signal from the terminal device. For downlink communication, however, the terminal device may receive the downlink signal directly from the network device without forwarding through a relay.

The network device in fig. 2 is, for example, a base station. The network device may correspond to different devices in different systems, for example, in a fourth generation mobile communication technology (4th generation, 4G) system, the network device may correspond to a network device in a 4G system, for example, an eNB, and in a 5G system, the network device may correspond to a network device in a 5G system, for example, a gNB. The relay in fig. 2 is implemented by a network device, for example, an AP.

Of course, besides the scenario shown in fig. 2, the scenario shown in fig. 1 may also be an application scenario of the embodiment of the present application.

The technical scheme provided by the embodiment of the application is described below with reference to the accompanying drawings.

The embodiment of the present application provides a first communication method, please refer to fig. 3, which is a flowchart of the method. In the following description, the method is applied to the network architecture shown in fig. 2 as an example. In addition, the method may be performed by two communication apparatuses, for example, a first communication apparatus and a second communication apparatus, where the first communication apparatus may be a network device or a communication apparatus capable of supporting the network device to implement the functions required by the method, or the first communication apparatus may be a terminal device or a communication apparatus capable of supporting the terminal device to implement the functions required by the method, and may of course be other communication apparatuses such as a system on chip. The same applies to the second communication apparatus, which may be a network device or a communication apparatus capable of supporting the network device to implement the functions required by the method, or a terminal device or a communication apparatus capable of supporting the terminal device to implement the functions required by the method, and of course, other communication apparatuses such as a system on a chip may also be used. The implementation manners of the first communication device and the second communication device are not limited, 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, or both the first communication device and the second communication device are 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. The network device is, for example, a base station.

For convenience of introduction, in the following, the method is performed by a terminal device and a network device as an example, that is, the first communication apparatus is a terminal device and the second communication apparatus is a network device as an example. Since the present embodiment is applied to the network architecture shown in fig. 2 as an example, the network device described below may be a network device in the network architecture shown in fig. 2, and the terminal device described below may be a terminal device in the network architecture shown in fig. 2.

S31, the network device determines an offset value or a fourth value, the offset value is used for the terminal device to determine a time window for receiving the random access response from the network device, and the fourth value is used for the terminal device to determine a time window for receiving the random access response from the network device. For example, the offset value is used for the terminal device to determine a time window for receiving a random access response from the network device if the measured RSRP is less than the RSRP threshold. The fourth value may also be used for the terminal device to determine a time window for receiving a random access response from the network device if the measured RSRP is less than the RSRP threshold. In fig. 3, the network device determines the offset value as an example, but S31 in fig. 3 may be replaced by the network device determining the fourth value.

For terminal devices at the edge of a cell, uplink signals may be transmitted to network devices through relays. Compared with the uplink signal which is not transmitted to the network device through the relay, the uplink signal transmitted through the relay has a certain time delay to reach the network device. For example, the preamble sent by the terminal device at the cell edge may be forwarded to the network device through the relay, so that the time when the preamble reaches the network device has a larger delay compared to the preamble sent by the terminal device in the non-relay scenario. After receiving the preamble, the network device sends an RAR to the terminal device, and therefore for the terminal device that forwards the uplink signal through the relay, a time resource where the RAR sent by the network device to the terminal device is located also has a larger time delay compared with a time resource of the RAR in a non-relay scenario, and the time delay may exceed a time length of an RAR receiving window, which may also cause the terminal device to be unable to receive the RAR.

Therefore, in the embodiment of the present application, an offset value may be provided, and a start time of a time window for the terminal device at the cell edge to receive the RAR may be determined according to the offset value and the first value, where the first value may be a time difference between the preset start time and an end time of a time unit for the terminal device to send a preamble, or the first value is the start time of the time window for the terminal device at the cell center (or the terminal device not at the cell edge) to receive the RAR. The start time of the time window for receiving the RAR by the terminal device at the cell center (or the terminal device not at the cell edge), that is, the preset start time, may be specified by a protocol, and the end time of the first time unit may be determined by the terminal device, so that the terminal device may determine the first value according to the end time of the first time unit and the preset start time. The preset starting time is the starting time of the time window for detecting the RAR when the terminal device directly sends the preamble to the network device without sending the preamble to the network device through the relay. Equivalently, the time window for the terminal device at the cell edge to receive the RAR is delayed by the time length of 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 detect the RAR within the time window, thereby improving the success rate of the terminal device for receiving the RAR. The preset starting time may be a starting time of a RAR receiving window specified by a protocol, and is generally a starting time of an nth time unit after the terminal device has sent the preamble.

Wherein the first value is greater than 0 and the offset value is also greater than 0.

Alternatively, the embodiment of the present application may provide a fourth value, and according to the fourth value, the start time of the time window for the terminal device at the cell edge to receive the RAR may be determined. As an alternative embodiment, 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. With respect to the first value and the offset value, reference is made to the above description. Wherein the fourth value may be greater than 0.

That is to say, the network device may configure the offset value, and the terminal device determines the starting time of the time window according to the first value and the offset value, or the network device may also configure the fourth value, and the terminal device may directly determine the starting time of the time window according to the fourth value, so that the terminal device may not even need to know the first value or the offset value, and the implementation is simpler for the terminal device.

The network device may determine the offset value or the fourth value based on the corresponding factor. For example, the network device may determine the offset value or the fourth value according to one or more of the processing capability of the relay or the timeslot 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 timeslot configuration of the cell, or determine the offset value or the fourth value according to the processing capability of the relay and the timeslot configuration of the cell. For example, different relays have different processing capabilities, some relays have strong processing capabilities and good processing capabilities, and can forward an uplink signal from a terminal device to a network device with a short delay, so that for a terminal device that forwards an uplink signal through such a relay, an offset value or a fourth value determined by the network device may be small; or, some relays have poor capability and need to forward the uplink signal from the terminal device with a large delay, the offset value or the fourth value determined by the network device may be large for the terminal device that forwards the uplink signal with such a relay.

Alternatively, the offset value or the fourth value may not be determined by the network device, for example, may be determined by negotiation between the network device and the terminal device, or may be specified by a protocol, or the like. If the offset value or the fourth value is not determined by the network device, S31 may not be necessary or S31 may be performed, but S31 is actually that the network device determines the offset value or the fourth value through negotiation with the terminal device or determines the offset value or the fourth value through a protocol.

In addition, the specific value of the offset value is not limited in the embodiment of the present application, for example, the offset value may be one or more slots, or one or more subframes, and the like. Similarly, the specific value of the fourth value is not limited in this embodiment of the application, for example, the fourth value may be one or more slots, or one or more subframes, and the like.

S32, the network device sends first indication information to the terminal device, and the terminal device receives the first indication information from the network device. The first indication information is used for indicating the offset value if the network equipment is configured with the offset value, or indicating the fourth value if the network equipment is configured with the fourth value.

Here, the first indication information indicates the offset value in fig. 3 as an example, but if the network device determines that the offset value is the fourth value in S31, S32 in fig. 3 may also be replaced by that the first indication information indicates the fourth value.

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

Of course, S32 may not be performed if the offset value is not determined by the network device, such as by a negotiation between the network device and the terminal device, or specified by a protocol.

Alternatively, if the network device determines that the fourth value is present, the network device may send the first indication information to the terminal device to indicate the fourth value. The terminal device may determine the fourth value upon receiving the first indication.

Of course, S32 may not be performed if the fourth value is not determined by the network device, such as by a negotiation between the network device and the terminal device, or specified by a protocol.

S33, the network device sends second indication information to the terminal device, and the terminal device receives the second indication information from the network device. The second indication information is used for indicating a first threshold value.

Generally, when a terminal device at different positions in a cell measures a signal from a network device, the obtained measurement result may be different. For example, the network device sends a first signal to the terminal device, the terminal device receives the first signal from the network device, and the terminal device measures the first signal to obtain a measurement result, such as Reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ), or the like. Taking the measurement result as RSRP as an example, the RSRP measured by the terminal device at the edge of the cell may be smaller than the RSRP measured by the terminal device at the center of the cell. Therefore, the position of the terminal device in the cell can be determined accordingly through the measurement result, for example, whether the terminal device is at the cell edge or at the cell center (or not at the cell edge) can be determined. For example, the terminal device may compare the measurement result with a first threshold, and if the measurement result is greater than or equal to the first threshold, the terminal device determines that the terminal device is located at the center of the cell (or not located at the edge of the cell); and if the measurement result is smaller than the first threshold value, the terminal equipment determines that the terminal equipment is positioned 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 center of the cell (or not located at the edge of the cell); 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, the terminal device at the edge of the cell is far away from the network device, and the uplink signal is forwarded through the relay, while the terminal device at the center of the cell is near to the network device, and the uplink signal is not required to be forwarded through the relay, but can be directly sent to the network device. Therefore, the time for receiving the random access response will be earlier for the terminal device located in the center of the cell or the terminal device not located at the edge of the cell, while the time for receiving the random access response will be relatively later for the terminal device located at the edge of the cell. Therefore, a terminal device at the cell edge 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, and a terminal device at the cell center may determine the start time of the time window for receiving the random access response without using the offset value or the fourth value.

In summary, it can be analyzed that the terminal device can determine the starting time of the time window for receiving the random access response directly according to the measurement result. For example, the terminal device compares the measurement result with a first threshold value, and if the measurement result is greater than or equal to the first threshold value, the terminal device determines that the start time of the time window for receiving the random access response is determined without using the offset value or the fourth value (or, the terminal device determines that the start time of the time window for receiving the random access response is determined using the first value); and if the measurement result is smaller than the first threshold value, the terminal equipment determines that the terminal equipment is positioned at the edge of the cell. Or, if the measurement result is greater than the first threshold, the terminal device determines that the start time of the time window for receiving the random access response does not need to be determined using the offset value or the fourth value (or, the terminal device determines that the start time of the time window for receiving the random access response is determined using the first value); and if the measurement result is less than or equal to the first threshold, the terminal device may determine to use the offset value or the fourth value to determine the starting time of the time window for receiving the random access response. Thus, the starting time of the time window for receiving the random access response can be directly determined through the measurement result, and the method is simple.

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 (SSB) or the like, and the reference signal is, for example, a channel state information-reference signal (CSI-RS) or the like. In addition, if the measurement result is RSRP, the first threshold may also be referred to as an RSRP threshold, or if the measurement result is RSRQ, the first threshold may also be referred to as an RSRQ threshold.

For example, the first indication information may be sent in a broadcast manner, for example, the first indication information is sent by a system message, and the terminal device may determine whether to use the offset value or the fourth value to determine the starting time of the time window by determining whether to be located at the cell edge. 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 indication information and the second indication information may be carried in the same message to be transmitted, and then S32 and S33 may be simultaneously performed. Or, the first indication information and the second indication information may also be carried in different messages to be sent. If the first indication information and the second indication information are carried in different messages and sent, the network device may send the first indication information and then send the second indication information, and S32 is executed before S33; alternatively, the network device may transmit the first indication information after transmitting the second indication information, and S33 is performed before S32; alternatively, the network device may transmit the first indication information and the second indication information at the same time, and S32 and S33 are performed at the same time.

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

It may be considered that the network device may send the first indication information and the second indication information to the terminal device before receiving the preamble from the terminal device, and the terminal device may also receive the first indication information and the second indication information from the network device before sending the preamble to the network device.

For example, in this embodiment, the terminal device is a terminal device at a cell edge. The terminal device sends the preamble to the relay, and the relay forwards the preamble to the network device.

And S35, the terminal equipment determines the starting time of the time window according to the RSRP, wherein the starting time of the time window is located after the ending time of the first time unit in the time domain.

The terminal device may determine the starting time of the time window according to the measurement result, where the measurement result is RSRP, and therefore the first threshold is an RSRP threshold. Alternatively, S35 may not be executed as a step, for example, S35 may also be described as the starting time of the time window is determined according to RSRP, and the starting time of the time window is located after the ending time of the first time unit in the time domain.

After sending the preamble, the terminal device needs to detect RAR. Accordingly, the terminal device may determine a time window for detecting the RAR. The time length of the time window for detecting the RAR may be configured by the network device, so that the terminal device may determine the time domain position of the time window as long as the starting time of the time window is determined. For example, the network device may send the third indication information to the terminal device, and the terminal device receives the third indication information from the network device, where the third indication 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 slot. For example, the third indication information may be transmitted through a system message, for example, in the NR system, the third indication information may be implemented through a ra-ResponseWindow command word. The network device may send the third indication information to the terminal device before receiving the preamble from the terminal device, and the terminal device may receive the third indication information from the network device before sending the preamble to the network device. The first indication information, the second indication information and the second indication information can be carried in the same message and sent; or, the first indication information, the second indication information and the third indication information may also be carried in different messages respectively and sent; or any two of the first indication information, the second indication information and the third indication information may be carried in one message and sent, and the remaining other indication information is carried in a different message and sent.

The time difference between the start time of the time window and the end time of the first time unit may be equal to a first value if the RSRP measured by the terminal device is greater than or equal to the RSRP threshold. Alternatively, 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.

Alternatively, 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 fourth 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 time difference between the start time of the time window and the end time of the first 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, a first value is also used, where the first value may be a time difference between the preset starting time and the ending time of the time unit for the terminal device to send the preamble. The preset starting time is a starting time of a time window for detecting the RAR when the terminal device directly sends the preamble to the network device without sending the preamble to the network device through a relay, or is understood as a starting time of a time window for receiving the RAR by a terminal device located in a cell center (or a terminal device not located at a cell edge, which means that RSRP measured by the terminal device is greater than or equal to an RSRP threshold). The first value may be specified by a protocol, or the preset starting time may be specified by a protocol, and the terminal device may determine the first value based on the preset starting time and the ending time of the first time unit, so that the first value may be considered known to the terminal device.

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

For example, referring to fig. 4, a schematic diagram of a time window determined for a terminal device whose measured RSRP is smaller than the RSRP threshold value is shown, in fig. 4, the terminal device determines a starting time of the time window according to a first value and an offset value. The first two rows in fig. 4 represent the starting time of the time window for detecting the RAR, which is determined by the terminal device whose measured RSRP is greater than or equal to the RSRP threshold, where the starting time is the preset starting time, and the time difference between the ending time and the starting time of the first time unit is the first value. The direct uplink (direct UL) indicates that the terminal device does not need to relay, but can directly transmit the uplink signal to the network device. The last two rows of fig. 4 represent the starting time of the time window for detecting the RAR, which is determined by the terminal device whose measured RSRP is less than the RSRP threshold value according to the offset value and the first value, and the time difference between the ending time of the first time unit and the starting time is the sum of the first value and the offset value. The relay uplink (relay UL) indicates that the terminal device needs to transmit an uplink signal to the network device through a relay. It can be seen that an offset value exists between the starting time of the time window determined by the terminal device whose measured RSRP is less than the RSRP threshold value and the starting time of the time window determined by the terminal device whose measured RSRP is greater than or equal to the RSRP threshold value, or between the starting time of the time window determined by the terminal device at the edge of the cell and the starting time of the time window determined by the terminal device at the center of the cell. For example, a square in fig. 4 represents a time slot, and fig. 4 illustrates that the offset value is 2 time slots.

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

The terminal device may determine, according to the measurement result, the RA-RNTI corresponding to the RAR, where the measurement result is RSRP, that is, the terminal device determines, according to the measured RSRP, the RA-RNTI corresponding to the RAR. The terminal device determines the RA-RNTI corresponding to the RAR according to the measured RSRP, and for this reason, it can be considered that the RA-RNTI corresponding to the RAR is related to the RSRP measured by the terminal device.

In the foregoing, as in the random access phase, the network device cannot acquire the identifier of the terminal device yet, the RAR sent by the network device may include an RA-RNTI associated with a resource location used by a preamble sent by the terminal device, where the RA-RNTI is used for enabling the terminal device to identify whether the received RAR corresponds to the terminal device. For example, the time resources and frequency resources of the preambles sent by the terminal device 1 at the cell edge and the terminal device 2 at the cell center are the same, and since the preamble of the terminal device 1 is forwarded to the network device through the relay, the network device receives the two preambles from the terminal device 1 and the terminal device 2, respectively. For example, the cell has only one uplink carrier, if the value of the calculated RA-RNTI of the terminal device 1 is the same as the value of the RA-RNTI of the terminal device 2 according to the current RA-RNTI calculation method, at this time, the terminal device 1 may mistakenly consider the RAR sent by the network device to the terminal device 2 as the RAR of the terminal device 1, and thus a communication error occurs.

In order to solve such a problem that may occur, in this embodiment of the present application, for a terminal device at a cell edge, or for a terminal device whose measured RSRP is less than (or equal to) an RSRP threshold, a value of an identifier of an uplink carrier corresponding to the terminal device may be a third value, and for a terminal device at a cell center (or for a terminal device that is not at the cell edge), or for a terminal device whose measured RSRP is greater than (or equal to) the RSRP threshold, a value of an identifier of an uplink carrier corresponding to the terminal device may be a second value. Then, if the RSRP measured by the terminal device is less than (or equal to) the RSRP threshold, the terminal device may determine that the value of the identifier of the corresponding uplink carrier 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 may determine that the value of the identifier of the corresponding uplink carrier is the second value. Wherein the second value is different from the third value. By the mode, the values of the RA-RNTIs corresponding to different terminal devices (or terminal devices at different positions) are different, so that the terminal devices can correctly identify the corresponding RARs, and the phenomenon of communication errors is avoided. For example, the second value may be 0, and the third value may not be 0.

Identification of uplink carriers, e.g. denoted ul_{carrier_id}. Currently, when calculating the RA-RNTI according to equation 1, ul is given if the cell has only one uplink carrier_{carrier_id}The values of (A) are all 0. However, ul is different according to the position of the terminal device in the embodiment of the present application_{carrier_id}The values of the parameters can be different, so that the RA-RNTIs calculated by the terminal equipment at different positions are different, and the network equipment can adopt different ul for the terminal equipment at different positions_{carrier_id}The values are used for calculating the RA-RNTI, the calculation results of the network equipment and the terminal equipment are kept consistent, and the terminal equipment can also identify the RAR corresponding to the terminal equipment. And the measurement results obtained by the terminal device will be different when the terminal device is located at different positions. Taking the measurement result as RSRP for example, if the terminal device determines that the measured RSRP is less than (or equal to) the RSRP threshold, ul is used by the terminal device when calculating RA-RNTI_{carrier_id}Is the third value, and ul adopted by the network equipment when calculating the RA-RNTI for the terminal equipment at the cell edge_{carrier_id}Is also a third value; or the terminal equipment determines that the measured RSRP is greater than (or equal to) the RSRP threshold value, and ul adopted by the terminal equipment when the terminal equipment calculates the RA-RNTI_{carrier_id}Is the second value, and the ul adopted by the network device when calculating the RA-RNTI for the terminal device which is not at the cell edge_{carrier_id}Is also a second value. As an alternative, the second value may be 0 and the third value may be 1. Let the third value be 1, so that ul_{carrier_id}The two values are continuous, the values of the third value and the second value are respectively '1' and '0', and the method can be realized only by 1 bit (bit), so that the storage space is saved. Of course, the third value may be other than 1The value of the other is only required to be different from the third value and the second value.

The RA-RNTI calculated by the terminal device and the network device can be calculated by formula 1, and thus the description is omitted.

S37, the network device sends an RAR in response to the preamble to the terminal device within the time window, and the terminal device detects the RAR in response to the preamble within the time window. Or, the terminal device starts to detect the RAR responding to the preamble sent by the terminal device from the starting time of the time window.

For a terminal device located in the center of a cell (or a terminal device not located at the edge of the cell), it appears as a terminal device whose measured RSRP is greater than (or equal to) the RSRP threshold, and the terminal device does not need to pass through a relay when sending a preamble to a network device, and the network device can receive the preamble from the terminal device earlier. The starting instant of the time window is then the end instant of the first time unit plus the instant of the first value for the terminal device. For the network device, the RAR is also sent within the time window.

Or, for a terminal device located at a cell edge, it appears that the measured RSRP is less than (or equal to) the RSRP threshold, the terminal device needs to pass through a relay when sending the preamble to the network device, and the network device may receive the preamble from the terminal device later. The start time of the time window is then either 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 for the terminal device. For the network device, the RAR is also sent within the time window.

For example, the network device may send the RAR to the terminal device within a 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 within the second time unit.

The terminal equipment calculates the value of the RA-RNTI, and then the RAR can be detected according to 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 RA-RNTI included in the RAR detected by the terminal device is different from the RA-RNTI calculated by the terminal device, it can be determined that the RAR is not the RAR corresponding to the terminal device.

In this embodiment of the application, the terminal device may determine, according to the RSRP, a starting time of a time window for the terminal device to receive the random access response, so that, because the RSRP of the terminal device at the edge of the cell is different from the RSRP of the terminal device at the center of the cell, the starting times of the time windows for the terminal devices at different positions to receive the random access response may be different. For example, the starting time of the time window determined by the terminal device at the cell edge may be later than the starting time of the time window for receiving the random access response determined by the terminal device at the cell center, and therefore, compared to the terminal device at the cell center, the terminal device at the cell edge may delay a period of time to receive the random access response, and since the network device may also delay a period of time when sending the random access response to the terminal device at the cell edge, the terminal device may delay receiving the random access response, and the success rate of receiving the random access response may be improved. According to the embodiment of the application, the terminal equipment can correctly receive the random access response in the relay deployment scene, and the problem that the terminal equipment at the edge of the cell cannot receive RAR is solved. And by resetting ul_{carrier_id}The problem that the terminal equipment mistakenly receives the RAR of other terminal equipment is solved, and the reliability of the terminal equipment for receiving the RAR is improved.

The following describes an apparatus for implementing the above method in the embodiment of the present application with reference to the drawings. Therefore, the above contents can be used in the subsequent embodiments, and the repeated contents are not repeated.

Fig. 5 is a schematic block diagram of a communication device 500 provided in an embodiment of the present application. Exemplarily, the communication apparatus 500 is, for example, a terminal device 500.

The terminal device 500 comprises a processing module 510. Optionally, a transceiver module 520 may also be included. Illustratively, the terminal device 500 may be a terminal device, and may also be a chip applied in the terminal device or other combined devices, components, and the like having the functions of the terminal device. When the terminal device 500 is a terminal device, the transceiver module 520 may be a transceiver, and may include an antenna, a radio frequency circuit, and the like, and the processing module 510 may be a processor, such as a baseband processor, and one or more Central Processing Units (CPUs) may be included in the baseband processor. When the terminal device 500 is a component having the above 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 the chip system (e.g., a baseband chip), and the processing module may be a processor of the chip system and may include one or more central processing units.

Among other things, the processing module 510 may be used to perform all operations performed by the terminal device in the embodiment shown in fig. 3 except transceiving operations, e.g., S35 and S36, and/or other processes for supporting the techniques described herein. The transceiving module 520 may be used to perform all transceiving operations performed by the terminal device in the embodiment illustrated in fig. 3, e.g., S32, S33, S34, and S37, and/or other processes for supporting the techniques described herein.

In addition, the transceiver module 520 may be a functional module that can perform both the transmitting operation and the receiving operation, for example, the transceiver module 520 may be used to perform all the transmitting operation and the receiving operation performed by the terminal device in the embodiment shown in fig. 3, for example, when the transmitting operation is performed, the transceiver module 520 may be considered as a transmitting module, and when the receiving operation is performed, the transceiver module 520 may be considered as a receiving module; alternatively, the transceiver module 520 may also be a general term for two functional modules, which are respectively a transmitting module and a receiving module, where the transmitting module is configured to complete a transmitting operation, for example, the transmitting module may be configured to perform all transmitting operations performed by the terminal device in the embodiment shown in fig. 3, and the receiving module is configured to complete a receiving operation, for example, the receiving module may be configured to perform all receiving operations performed by the terminal device in the embodiment shown in fig. 3.

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

a processing module 510, configured to determine a starting time of a time window according to RSRP, where the starting time of the time window is located after an ending time of the first time unit in a 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 time. Or may be considered to be, the processing module 510 is further configured to start detecting a random access response in response to the random access preamble at the starting time.

Alternatively, the first and second electrodes may be,

a transceiver module 520, configured to send a random access preamble to a network device in a 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 a starting time of a time window, where the starting time of the time window is determined according to RSRP, and the starting time of the time window is located after an ending time of the first time unit in a time domain. Or it may 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 a starting time of a time window, where the starting time of the time window is determined according to RSRP, and the starting time of the time window is located after an ending time of the first time unit in a time domain.

As an alternative to the above-described embodiment,

wherein the first value and the offset value are both greater than 0.

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 alternative to the above-described embodiment,

a fourth value such as a time difference between a start time of the time window and an end time of the first time unit when the RSRP is less than an RSRP threshold;

wherein the first value and the fourth value are both greater than 0.

As an alternative embodiment, 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 radio network temporary identifier corresponding to the random access response is related to the RSRP.

As an alternative to the above-described embodiment,

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 alternative to the above-described embodiment,

a transceiver module 520, 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 embodiments 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 further provides a communication apparatus 600. Exemplarily, the communication apparatus 600 is, for example, a terminal device 600. Illustratively, the terminal device 600 may be a communication device, such as a terminal device, or may also be a system-on-chip 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. Wherein the memory 620 stores therein computer instructions or programs, and the processor 610 may 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 configured to perform the operations performed by the processing module 510 in the above embodiments, and the transceiver 630 is configured to perform the operations performed by the transceiver module 520 in the above embodiments. 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 the program stored in the external memory are executed, the processor 610 is configured to perform the operations performed by the processing module 510 in the above-mentioned embodiment, and the transceiver 630 is configured to perform the operations performed by the transceiver module 520 in the above-mentioned embodiment.

The transceiver 630 may be a functional unit that can perform both the transmitting operation and the receiving operation, for example, the transceiver 630 may be used to perform all the transmitting operation and the receiving operation performed by the terminal device in the embodiment shown in fig. 3, for example, when the transmitting operation is performed, the transceiver 630 may be considered as a transmitter, and when the receiving operation is performed, the transceiver 630 may be considered as a receiver; alternatively, the transceiver 630 may also be a general term for two functional units, which are respectively a transmitter and a receiver, where the transmitter is configured to perform a transmitting operation, for example, the transmitter may be configured to perform all transmitting operations performed by the terminal device in the embodiment shown in fig. 3, and the receiver is configured to perform a receiving operation, for example, the receiver may be configured to perform all receiving operations performed by the terminal device in the embodiment shown in fig. 3.

In addition, if the communication apparatus 600 is a chip system, the transceiver 630 may also be implemented by a communication interface of the chip system, and the communication interface is connected to a radio frequency transceiver component in the communication device to implement transceiving of information through the radio frequency transceiver component. The communication interface may be a functional unit that can perform both the transmission operation and the reception operation, for example, the communication interface may be used to perform all the transmission operation and the reception operation performed by the terminal device in the embodiment shown in fig. 3, for example, when the transmission operation is performed, the communication interface may be regarded as the transmission interface, and when the reception operation is performed, the communication interface may be regarded as the reception interface; alternatively, the communication interface may also be a general term of two functional units, which are respectively a transmitting interface and a receiving interface, where the transmitting interface is used to complete the transmitting operation, for example, the transmitting interface may be used to perform all the transmitting 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 may be used to perform all the 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 may implement the function of the terminal device in the embodiment shown in fig. 3, and the operation and/or the function of each module in the terminal device 500 or the terminal device 600 are respectively for implementing the corresponding flow in the embodiment shown in fig. 3, and are not described herein again for brevity.

Fig. 7 is a schematic block diagram of a communication device 700 according to an embodiment of the present application. Illustratively, the communication device 700 is, for example, a network device 700.

Network device 700 includes a processing module 710. Optionally, a transceiver module 720 may also be included. Illustratively, the network device 700 may be a terminal device, and may also be a chip applied in the terminal device or other combined devices, components, and the like having the functions of the terminal device. When the network device 700 is a terminal device, the transceiver module 720 may be a transceiver, may include an antenna, a radio frequency circuit, and the like, and the processing module 710 may be a processor, such as a baseband processor, which may include one or more CPUs therein. When the network device 700 is a component having the above-described terminal functions, 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 system-on-chip, the transceiver module 720 may be an input-output interface of the system-on-chip (e.g., a baseband chip), and the processing module may be a processor of the system-on-chip and may include one or more central processing units.

Among other things, processing module 710 may be used to perform all operations performed by a network device in the embodiment shown in fig. 3 except transceiving operations, e.g., S31, and/or other processes for supporting the techniques described herein. The transceiving module 720 may be used to perform all transceiving operations performed by the network device in the embodiment illustrated in fig. 3, e.g., S32, S33, S34, and S37, and/or other processes for supporting the techniques described herein.

In addition, the transceiver module 720 may be a functional module that can perform both the transmitting operation and the receiving operation, for example, the transceiver module 720 may be used to perform all the transmitting operation and the receiving operation performed by the network device in the embodiment shown in fig. 3, for example, when the transmitting operation is performed, the transceiver module 720 may be considered as a transmitting module, and when the receiving operation is performed, the transceiver module 720 may be considered as a receiving module; alternatively, the transceiver module 720 may also be a general term for two functional modules, which are respectively a transmitting module and a receiving module, where the transmitting module is configured to complete a transmitting operation, for example, the transmitting module may be configured to perform all transmitting operations performed by the network device in the embodiment shown in fig. 3, and the receiving module is configured to complete a receiving operation, for example, the receiving module may be configured to perform all 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 for the terminal device to determine a time window for receiving a random access response from the network device if reference signal received power, RSRP, is less than an RSRP threshold;

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

Alternatively, the first and second electrodes may be,

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

a transceiver module 720, 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 alternative implementation, the transceiver module 720 is further configured to:

the terminal device is also used for receiving a random access preamble from the terminal device in a first time unit;

It should be understood that the processing module 710 in the embodiments 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 further provides a communication apparatus 800. Illustratively, the communication device 800 is, for example, a network device 800. Illustratively, the network device 800 may be a communication device, such as a network device, or may also be a system-on-chip or the like. Network device 800 includes a processor 810. Optionally, a memory 820 may also be included. Optionally, a transceiver 830 may also be included. Wherein the memory 820 stores computer instructions or programs, the processor 810 may 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 configured to perform the operations performed by the processing module 710 in the above embodiments, and the transceiver 630 is configured to perform the operations performed by the transceiver module 720 in the above embodiments. Alternatively, the network device 600 may not include the memory 820, for example, the memory is located outside the network device 800, and when the computer instructions or programs stored in the external memory are executed, the processor 810 is configured to perform the operations performed by the processing module 710 in the above embodiments, and the transceiver 830 is configured to perform the operations performed by the transceiver module 720 in the above embodiments.

Where transceiver 830 may be a functional unit that can perform both transmit and receive operations, for example, transceiver 830 may be used to perform all transmit and receive operations performed by the network device in the embodiment shown in fig. 3, e.g., transceiver 830 may be considered a transmitter when performing transmit operations and transceiver 830 may be considered a receiver when performing receive operations; alternatively, the transceiver 830 may also be a general term for two functional units, namely a transmitter and a receiver, where the transmitter is used to perform a transmitting operation, for example, the transmitter may be used to perform all transmitting operations performed by the network device in the embodiment shown in fig. 3, and the receiver is used to perform a receiving operation, for example, the receiver may be used to perform all receiving operations performed by the network device in the embodiment shown in fig. 3.

In addition, if the communication apparatus 800 is a chip system, the transceiver 830 may also be implemented by a communication interface of the chip system, and the communication interface is connected to a radio frequency transceiver component in the communication device to implement transceiving of information through the radio frequency transceiver component. The communication interface may be a functional unit that can perform both the sending operation and the receiving operation, for example, the communication interface may be used to perform all the sending and receiving operations performed by the network device in the embodiment shown in fig. 3, for example, the communication interface may be considered as the sending interface when the sending operation is performed, and the communication interface may be considered as the receiving interface when the receiving operation is performed; alternatively, the communication interface may also be a general term of two functional units, which are respectively a transmitting interface and a receiving interface, where the transmitting interface is used to complete the transmitting operation, for example, the transmitting interface may be used to perform all the transmitting 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 may implement the functions of the network device in the embodiment shown in fig. 3, and the operations and/or functions of the respective modules in the network device 700 or the network device 800 are respectively for implementing the corresponding flows in the embodiment shown in fig. 3, and are not described herein again for brevity.

The embodiment of the application also provides a communication device, and the communication device can be terminal equipment or a circuit. The communication device may be configured to perform the actions performed by the terminal device in the above-described method embodiments.

When the communication device is a terminal device, fig. 9 shows a simplified structural diagram of the terminal device. For easy understanding and illustration, in fig. 9, the terminal device is exemplified by a mobile phone. As shown in fig. 9, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input-output device. The processor is mainly used for processing communication protocols and communication data, controlling the terminal equipment, executing software programs, processing data of the software programs and the like. The memory is used primarily for storing software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user. It should be noted that some kinds of terminal devices may not have input/output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs baseband signals to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signals and sends the radio frequency signals to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 9. In an actual end 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 a storage device, etc. The memory may be provided independently of the processor, or may be integrated with the processor, which is not limited in this embodiment.

In the embodiment of the present application, the antenna and the radio frequency circuit having the transceiving function may be regarded as a transceiving unit of the terminal device, and the processor having the processing function may be regarded as a processing unit of the terminal device. As shown in fig. 9, the terminal device includes a transceiving unit 910 and a processing unit 920. A transceiver unit may also be referred to as a transceiver, a transceiving device, etc. A processing unit may also be referred to as a processor, a processing board, a processing module, a processing device, or the like. Optionally, a device for implementing a receiving function in the transceiving unit 910 may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiving unit 910 may be regarded as a transmitting unit, that is, the transceiving unit 910 includes a receiving unit and a transmitting unit. A transceiver unit may also sometimes be referred to as a transceiver, transceiving circuitry, or the like. A receiving unit may also be referred to as a receiver, a receiving circuit, or the like. A transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.

It should be understood that the transceiving unit 910 is configured to perform the transmitting operation and the receiving operation on the terminal device side in the above method embodiments, and the processing unit 920 is configured to perform other operations besides the transceiving operation on the terminal device in the above method embodiments.

For example, in one implementation, the transceiving unit 910 is configured to perform all of the transmitting and receiving operations of the terminal device in the embodiment shown in fig. 3, e.g., S35 and S36, and/or the transceiving unit 910 is further configured to perform other processes in support of the techniques described herein. A processing unit 920 for performing all operations except transceiving operations performed by the terminal device in the embodiment shown in fig. 3, e.g., S32, S33, S34, and S37, and/or the processing unit 920 is further configured to perform other processes in support of the techniques described herein.

When the communication device is a chip-like device or circuit, the device may comprise a transceiver unit and a processing unit. The transceiver unit may be an input/output circuit and/or a communication interface; the processing unit is an integrated processor or microprocessor or integrated circuit.

When the communication device in this embodiment is a terminal device, reference may be made to the device shown in fig. 10. As an example, the device may perform functions similar to processor 610 of FIG. 6. In fig. 10, the apparatus includes a processor 1010, a transmit data processor 1020, and a receive data processor 1030. The processing module 510 in the above embodiments may be the processor 1010 in fig. 10, and performs corresponding functions; the transceiver module 520 in the above embodiments may be the transmit data processor 1020 and/or the receive data processor 1030 in fig. 10. Although fig. 10 shows a channel encoder and a channel decoder, it is understood that these blocks are not limitative and only illustrative to the present embodiment.

Fig. 11 shows another form of the present embodiment. The processing device 1100 includes modules such as a modulation subsystem, a central processing subsystem, and peripheral subsystems. The communication device in this embodiment may serve as a modulation subsystem therein. In particular, the modulation subsystem may include a processor 1103 and an interface 1104. The processor 1103 completes the functions of the processing module 510, and the interface 1104 completes the functions of the transceiver module 520. As another variation, the modulation subsystem includes a memory 1106, a processor 1103 and a program stored on the memory 1106 and operable on the processor, and the processor 1103 implements the method on the terminal device side in the above method embodiments when executing the program. It should be noted that the memory 1106 may be non-volatile or volatile, and may be located within the modulation subsystem or within the processing device 1100, as long as the memory 1106 is connected to the processor 1103.

When the device in the embodiment of the present application is a network device, the device may be as shown in fig. 12. The apparatus 1200 includes one or more radio frequency units, such as a Remote Radio Unit (RRU) 1210 and one or more baseband units (BBUs) (also referred to as digital units, DUs) 1220. The RRU1210 may be referred to as a transceiver module, which corresponds to the transceiver module 720 in fig. 7. Alternatively, the transceiver module may also be referred to as a transceiver, a transceiving circuit, a transceiver, or the like, which may include at least one antenna 1211 and a radio frequency unit 1212. The RRU1210 is mainly used for transceiving radio frequency signals and converting the radio frequency signals and baseband signals, for example, for sending indication information to a terminal device. The BBU1210 part is mainly used for performing baseband processing, controlling a base station, and the like. The RRU1210 and the BBU1220 may be physically disposed together or may be physically disposed separately, i.e., distributed base stations.

The BBU1220 is a control center of the base station, and may also be referred to as a processing module, and may correspond to the processing module 720 in fig. 7, and is mainly used for performing baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and the like. For example, the BBU (processing module) may be configured to control the base station to perform an operation procedure related to the network device in the foregoing method embodiment, for example, to generate the foregoing indication information.

In an example, the BBU1220 may be formed by one or more boards, and the boards may support a radio access network of a single access system (e.g., an LTE network) together, or may support radio access networks of different access systems (e.g., an LTE network, a 5G network, or other networks) respectively. BBU1220 further includes a memory 1221 and a processor 1222. The memory 1221 is used to store necessary instructions and data. The processor 1222 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the operation procedures related to the network device in the above method embodiments. The memory 1221 and the processor 1222 may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.

The embodiment of the application provides a communication system. The communication system may comprise at least one terminal device as referred to in the above-described embodiment shown in fig. 3, and a network device as referred to in the above-described embodiment shown in fig. 3. The terminal device is, for example, communication apparatus 500 in fig. 5 or communication apparatus 600 in fig. 6. For example, the terminal device may be configured to perform all operations performed by the terminal device in the embodiment shown in fig. 3, such as: S32-S37 in the embodiment shown in FIG. 3, and/or other processes for supporting the techniques described herein. The network device may be used to perform all of the operations performed by the network device in the embodiment shown in fig. 3, such as: S31-S34 and S37 in the embodiment shown in FIG. 3, and/or other processes for supporting the techniques described herein.

An embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium is used to store a computer program, and when the computer program is executed by a computer, the computer may implement the process related to the terminal device in the embodiment shown in fig. 3 and provided by the foregoing method embodiment.

An embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a computer, the computer may implement the process related to the network device in the embodiment shown in fig. 3 and provided by the foregoing method embodiment.

An embodiment of the present application further provides a computer program product, where the computer program is used to store a computer program, and when the computer program is executed by a computer, the computer may implement the process related to the terminal device in the embodiment shown in fig. 3 and provided by the foregoing method embodiment.

An embodiment of the present application further provides a computer program product, where the computer program is used to store a computer program, and when the computer program is executed by a computer, the computer may implement the process related to the network device in the embodiment shown in fig. 3 and provided by the foregoing method embodiment.

It should be understood that the processor mentioned in the embodiments of the present application may be a CPU, and may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory referred to in the embodiments of the application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

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

It should be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific implementation of the present application, but the scope of the embodiments of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the embodiments of the present application, and all the changes or substitutions should be covered by the scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.

Claims

A method of communication, comprising:

sending a random access preamble to network equipment in a first time unit;

determining a starting time of a time window according to Reference Signal Received Power (RSRP), wherein the starting time of the time window is located after an ending time of the first time unit in a time domain; and

detecting a random access response in response to the random access preamble is started at the start time.
The method of claim 1,

the time difference between the starting time of the time window and the ending time of the first time unit is equal to a first value if the RSRP is greater than or equal to an RSRP threshold; or the like, or, alternatively,

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

wherein the first value and the offset value are both greater than 0.
The method of claim 2, further comprising:

receiving first indication information from the network device, wherein the first indication information is used for indicating the offset value.
The method of claim 1,

the time difference between the starting time of the time window and the ending time of the first time unit is equal to a first value if the RSRP is greater than or equal to an RSRP threshold; or the like, or, alternatively,

in the case that the RSRP is less than an RSRP threshold, a time difference between a start time of the time window and an 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 0.
The method of claim 4, further comprising:

receiving first indication information from the network device, wherein the first indication information is used for indicating the fourth value.
The method according to any one of claims 1 to 5,

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

the random access wireless network temporary identification is a second value when the RSRP is larger than or equal to an RSRP threshold value; or the like, or, alternatively,

the random access wireless network temporary identification is a third value when the RSRP is smaller than the RSRP threshold value;

wherein the second value is different from the third value.
The method of claim 2, 3, 4, 5 or 7, further comprising:

receiving second indication information from the network device, wherein the second indication information is used for indicating the RSRP threshold value.
The method according to any one of claims 1 to 8, further comprising:

receiving a first signal from the network device, the first signal comprising a synchronization signal or a reference signal;

and measuring the first signal to obtain the RSRP.
A method of communication, comprising:

determining an offset value, wherein the offset value is used for a terminal device to determine a time window for receiving a random access response from a network device if Reference Signal Received Power (RSRP) is smaller than an RSRP threshold;

and sending first indication information to the terminal equipment, wherein the first indication information is used for indicating the deviation value.
The method of claim 10, further comprising:

and sending second indication information to the terminal equipment, wherein the second indication information is used for indicating the RSRP threshold value.
The method according to claim 10 or 11,

receiving a random access preamble from the terminal device within a first time unit;

and sending a random access response to the terminal equipment in a second time unit in the time window, wherein the starting time of the time window is positioned after the ending time of the first time unit in the time domain.
A communications apparatus, comprising:

a receiving and sending module, configured to send a random access preamble to a network device in a first time unit;

the processing module is used for determining a starting time of a time window according to Reference Signal Received Power (RSRP), wherein the starting time of the time window is located behind an ending time of the first time unit in a 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 time.
The communication device of claim 13,

the time difference between the starting time of the time window and the ending time of the first time unit is equal to a first value if the RSRP is greater than or equal to an RSRP threshold; or the like, or, alternatively,

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

wherein the first value and the offset value are both greater than 0.
The communications apparatus as claimed in 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 of claim 13,

the time difference between the starting time of the time window and the ending time of the first time unit is equal to a first value if the RSRP is greater than or equal to an RSRP threshold; or the like, or, alternatively,

in the case that the RSRP is less than an RSRP threshold, a time difference between a start time of the time window and an 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 0.
The communications apparatus as claimed in claim 16, wherein the transceiver module is further configured to receive a 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,

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

the random access wireless network temporary identification is a second value when the RSRP is larger than or equal to an RSRP threshold value; or the like, or, alternatively,

the random access wireless network temporary identification is a third value when the RSRP is smaller than the RSRP threshold value;

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

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, comprising:

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

and the transceiver module is used for sending first indication information to the terminal equipment, wherein the first indication information is used for indicating the deviation value.
The network device of claim 22, wherein the transceiver module is further configured to send second indication information to the terminal device, and wherein the second indication information is used to indicate the RSRP threshold.
The network device of claim 22 or 23, wherein the transceiver module is further configured to:

receiving a random access preamble from the terminal device within a first time unit;

and sending a random access response to the terminal equipment in a second time unit in the time window, wherein the starting time of the time window is positioned after the ending time of the first time unit in the time domain.
A communication system comprising a communication apparatus according to any of claims 13 to 21 and a network device according to any of claims 22 to 24.
A computer-readable storage medium, characterized in that it stores a computer program which, when run on a computer, causes the computer to perform the method of any of claims 1-9, or causes the computer to perform the method of any of claims 10-12.
A chip system, comprising:

a communication interface for communicating with other devices;

a processor configured to cause a communication device in which the system-on-chip is installed to perform the method of any one of claims 1 to 9, or to cause the communication device to perform the method of any one of claims 10 to 12.
A computer program product, characterized in that it comprises a computer program which, when run on a computer, causes the computer to carry out the method according to any one of claims 1 to 9, or causes the computer to carry out the method according to any one of claims 10 to 12.