Signal transmission methods and devices, communication systems

Abstract

This application provides a signal transmission method, apparatus, and communication system. The signal transmission method includes: determining the transmission power of a reference signal transmitted by a transmitting beam of a relay device; determining the reception power of the reference signal received by a receiving beam of the relay device; determining the isolation between the transmitting and receiving beams based on the transmission and reception power of the reference signal; determining a first power amplification factor for signal transmission between the transmitting and receiving beams based on the isolation factor, wherein the first power amplification factor is less than the isolation factor; and forwarding the signal to be relayed received by the receiving beam to the transmitting beam based on the first power amplification factor. This application can avoid the situation where the actual power amplification factor between the transmitting and receiving beams is too large, thereby improving the communication performance of the communication system.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a signal transmission method and apparatus, and a communication system. Background Technology

[0002] A communication system includes network devices, terminal devices, and one or more relay devices located between the network devices and the terminal devices. During transmission between network devices and terminal devices, signal power gradually attenuates, leading to signal distortion. Relay devices amplify and forward received signals to reduce power attenuation during transmission.

[0003] The relay equipment includes a transmitting antenna and a receiving antenna. The transmitting antenna includes one or more transmitting beams, and the receiving antenna includes one or more receiving beams. During signal transmission, the receiving beams receive signals transmitted by the upstream device and transmit the received signals back to the transmitting beams. The signal is amplified during transmission to the transmitting beams, and the transmitting beams then transmit the amplified received signals to the next-level device.

[0004] However, when the transmitting beam sends a signal to the next-level device, the signal is also amplified and transmitted to the receiving beam, causing the signal to loop at the relay device. When the power amplification factor between the transmitting and receiving beams is large, the power of the signal transmitted from the transmitting beam to the receiving beam gradually increases, causing self-oscillation in the relay device. This affects signal transmission in the communication system, resulting in poor communication performance. Therefore, providing an effective signal transmission method has become an urgent technical problem to be solved. Summary of the Invention

[0005] This application provides a signal transmission method, apparatus, and communication system to avoid excessively large actual power amplification between the transmitting and receiving beams, thereby improving the communication performance of the communication system.

[0006] In a first aspect, this application provides a signal transmission method, the method comprising: determining the transmission power of a transmitting beam of a relay device for transmitting a reference signal; determining the receiving power of a receiving beam of the relay device for receiving the reference signal; determining an isolation degree between the transmitting beam and the receiving beam based on the transmission power and the receiving power of the reference signal; determining a first power amplification factor for signal transmission between the transmitting beam and the receiving beam based on the isolation degree, wherein the first power amplification factor is less than the isolation degree; and forwarding a signal to be forwarded received by the receiving beam to the transmitting beam based on the first power amplification factor.

[0007] In this configuration, the transmit and receive beams are located in physically independent antennas. The transmit and receive beams can be located in the same or different antenna elements. Isolation can be defined as the loss (i.e., power attenuation) of the reference signal as it propagates between the transmit and receive beams.

[0008] Repeater equipment can determine the isolation between the transmit and receive beams using the difference between the transmit and receive power of a reference signal. Repeater equipment has multiple operating modes, and the isolation between any transmit beam and any receive beam may differ in different operating modes.

[0009] In one implementation, the transmission power of the relay device's transmit beam for transmitting the reference signal can be determined in the current operating mode of the relay device; the reception power of the relay device's receive beam for receiving the reference signal can be determined; based on the transmission power and reception power of the reference signal, the isolation between the transmit beam and the receive beam can be determined, and the isolation between the transmit beam and the receive beam in the current operating mode can be used as the isolation between the transmit beam and the receive beam in all operating modes. That is, the isolation between the transmit beam and the receive beam is the same in all operating modes.

[0010] In another implementation, the transmission power of the relay device's transmit beam for transmitting the reference signal can be determined in each operating mode; the reception power of the relay device's receive beam for receiving the reference signal can be determined; and the isolation between the transmit beam and the receive beam can be determined based on the transmission power and reception power of the reference signal.

[0011] After determining the isolation level, the first power amplification factor can be determined directly based on the isolation level. Alternatively, the maximum permissible first power amplification factor can be determined based on the isolation level, and then the first power amplification factor can be determined based on the maximum permissible first power amplification factor. The maximum permissible first power amplification factor is less than the isolation level, and the first power amplification factor is less than or equal to the maximum permissible first power amplification factor.

[0012] Optionally, the difference between the isolation and the maximum permissible first power amplification factor or the first power amplification factor can be greater than or equal to a first difference threshold. The first difference threshold is any value greater than 0, such as 10, 15, and 20, etc. This application does not limit this value.

[0013] In this signal transmission method, the first power amplification factor is less than the isolation between the first transmitting beam and the receiving beam, which can effectively avoid the situation where the actual power amplification factor between the first transmitting beam and the receiving beam is too large. This ensures that the power will not gradually increase during the transmission of the signal from the first transmitting beam to the receiving beam, and the signal transmitted by the first relay device will not be distorted, thereby improving the communication performance of the communication system.

[0014] In one possible implementation, determining the first power amplification factor for signal transmission between the transmit beam and the receive beam based on the isolation between the transmit beam and the receive beam includes: determining the power amplification factor corresponding to the isolation between the transmit beam and the receive beam as the first power amplification factor according to the mapping relationship between isolation and power amplification factor.

[0015] In one possible implementation, the mapping relationship includes a correspondence between multiple isolation intervals and multiple power amplification factors; determining the power amplification factor corresponding to the isolation between the transmit beam and the receive beam as the first power amplification factor based on the mapping relationship between isolation and power amplification factor includes: determining the target isolation interval to which the isolation between the transmit beam and the receive beam belongs in the multiple isolation intervals; and determining the power amplification factor corresponding to the target isolation interval as the first power amplification factor.

[0016] In one possible implementation, the left endpoint value of the first isolation interval is greater than the left endpoint value of the second isolation interval, the right endpoint value of the first isolation interval is greater than the right endpoint value of the second isolation interval, and the power amplification factor corresponding to the first isolation interval is greater than the power amplification factor corresponding to the second isolation interval; wherein, the first isolation interval and the second isolation interval are any two isolation intervals among the plurality of isolation intervals.

[0017] In one possible implementation, each of the plurality of power amplification factors is less than or equal to the left endpoint value of the corresponding isolation interval. For example, the difference between the left endpoint value of each isolation interval and the corresponding power amplification factor can be greater than or equal to a second difference threshold. The second difference threshold can be any value greater than zero, such as 10, 15, and 20, etc., and this application does not limit it in this regard.

[0018] In one possible implementation, the mapping relationship is configured and sent to the relay device by the network device, or the mapping relationship is pre-stored in the relay device. For example, the method further includes: obtaining the mapping relationship between the isolation and the power amplification factor. When the mapping relationship is configured and sent to the relay device by the network device, the relay device can receive the mapping relationship sent by the network device. For example, the network device can send indication information to the relay device, the indication information indicating the mapping relationship; the relay device can obtain the mapping relationship based on the indication information. When the mapping relationship is pre-stored in the relay device, the relay device can obtain the stored mapping relationship.

[0019] In one possible implementation, determining the transmission power of the reference signal transmitted by the relay device's transmit beam includes: receiving configuration information of the reference signal transmitted by the network device, the configuration information including power control parameters; and determining the transmission power of the reference signal based on the power control parameters.

[0020] Configuration information can be used to indicate the resources of reference signals. Each configuration information can indicate the resources of one or more reference signals or a set of resources of one or more reference signals.

[0021] In one possible implementation, the power control parameters include at least one of the following: power value, initial transmission power of the reference signal, maximum transmission power of the reference signal, transmission power ramp-up step of the reference signal, second power amplification factor of the target signal when transmitted between the transmission beam and the receiving beam, receiving power of the receiving beam receiving the target signal, and quality of the receiving beam receiving the target signal; wherein the target signal is a signal sent to the relay device by other devices connected to the relay device.

[0022] The power value can be any value determined by the network device, or it can be determined by the network device based on at least one of the following parameters: the initial transmit power (InitialTxPowerILM) of the reference signal, the maximum transmit power (maxPowerILM) of the reference signal, the power ramping step (PowerRampingStepILM) of the reference signal, the second power amplification factor of the target signal when it is transmitted between the transmit beam and the receive beam, the receive power of the receive beam when it receives the target signal, and the quality of the target signal received by the receive beam.

[0023] When the power control parameters include a power value, that power value can be directly used as the transmission power of the reference signal. When the power control parameters do not include a power value, the transmission power of the reference signal can be determined based on the parameters included in the power control parameters.

[0024] In one example, the network device can determine the power value based on a power formula and at least one of the parameters mentioned above. The power formula may include:

[0025] P(i)=min{InitialTxPowerILM,maxPowerILM+10log 10 (2 μ ·M(i))+l×PowerRampingStepILM(i)} or:

[0026] P(i)=min{maxPowerILM,InitialTxPowerILM+10log 10 (2 μ ·M(i))+l×PowerRampingStepILM(i)} or:

[0027] P(i)=min{maxPowerILM,InitialTxPowerILM+l×PowerRampingStepILM(i)}

[0028] Where P(i) represents the power value in decibel milliwatts (dBm), i represents the opportunity to transmit the reference signal, μ represents the subcarrier spacing, M(i) represents the bandwidth of the reference signal, and l represents the number of ramps.

[0029] In another example, the network device can determine the power value based on a second power amplification factor as the target signal is transmitted between the transmit and receive beams. For example, the power value P(i) = a + x, where a represents the second power amplification factor and x represents the power offset.

[0030] In another example, the network device can determine the power value based on the second power amplification factor of the target signal as it is transmitted between the transmit and receive beams, and the received power of the target signal received by the receive beam. For example, the power value P(i) = a + b + x, where b represents the received power of the target signal received by the receive beam.

[0031] In another example, the network device can determine the power value based on the second power amplification factor of the target signal as it is transmitted between the transmit and receive beams, and the quality of the target signal received by the receive beam. For example, the power value P(i) = a + c + x, where c represents the quality of the target signal received by the receive beam.

[0032] Based on the aforementioned power control parameters, the configuration information may also include at least one of the following parameters: transmit beam identifier, resource pattern information of reference signal, and time-frequency position information of reference signal.

[0033] The configuration information may also include the time of the corresponding reference signal. If the time of the reference signal in the configuration information is the uplink time, in one case, the transmit beam is the uplink transmit beam, and correspondingly, the receive beam is the uplink receive beam. This ensures that the transmission direction of the reference signal is consistent with the transmission direction of the uplink signal to be forwarded, thereby effectively avoiding interference between the transmission of the reference signal and the transmission of the uplink signal to be forwarded.

[0034] In another scenario, the transmit beam is a downlink transmit beam, and correspondingly, the receive beam is a downlink receive beam. This effectively avoids interference from signals transmitted from the terminal device to the network device during the transmission of the reference signal, thereby improving the accuracy of the isolation subsequently determined based on the reference signal.

[0035] If the reference signal in the configuration information is in downlink time, in one scenario, the transmit beam is the downlink transmit beam, and correspondingly, the receive beam is the downlink receive beam. This ensures that the transmission direction of the reference signal is consistent with the transmission direction of the downlink signal to be forwarded, thereby effectively preventing the transmission of the reference signal from interfering with the transmission of the downlink signal to be forwarded.

[0036] In another scenario, the transmit beam is the uplink transmit beam, and correspondingly, the receive beam is the uplink receive beam. This effectively avoids interference from signals transmitted from network devices to terminal devices during the transmission of the reference signal, thereby improving the accuracy of the isolation subsequently determined based on the reference signal.

[0037] In one possible implementation, the number of reference signals is one or more, the number of configuration information items is one or more, and one configuration information item corresponds to one or more reference signals. When there are multiple configuration information items, these multiple configuration information items can be the same or different.

[0038] At least one of the following configuration reference information is used by network devices to determine the configuration information of reference signals: relay capability of relay devices and information on the type of relay devices themselves, etc.

[0039] When the configuration reference information includes relay capabilities, the method further includes: sending the relay capabilities of the relay device to the network device, wherein the relay capabilities are used by the network device to determine the configuration information; wherein the relay capabilities include at least one of the following: the maximum isolation, maximum amplification factor, maximum transmit power, power margin, amplification factor margin, measurement capability, and number of beams of the relay device.

[0040] When the configuration reference information includes information about its own device type, the method further includes: sending the information about its own device type to the network device, wherein the information about its own device type is used by the network device to determine the configuration information; wherein the information about its own device type includes the type of relay device, such as amplified forwarding type, frequency shift forwarding, and noise reduction forwarding.

[0041] The relay device can acquire configuration information of the reference signal based on a triggering mechanism. In one possible implementation, the method further includes: when the pre-configured power amplification factor between the transmitted beam and the received beam is not within a first range, sending a configuration request to the network device, the configuration request being used to request the network device to determine the configuration information.

[0042] The first range can be preset by the relay device or sent by the receiving network device. This first range can include [0, t1], where t1 > 0. Optionally, t1 can be determined by the relay device based on the maximum amplification factor included in the relay capability. For example, t1 = maximum amplification factor - y, where y can be any value, such as -5, 0, 10, 15, or 20.

[0043] In one possible implementation, after determining the isolation between the transmit beam and the receive beam based on the transmit power and receive power of the reference signal, the method further includes: sending the isolation between the transmit beam and the receive beam to the network device, wherein the isolation between the transmit beam and the receive beam is used by the network device to re-determine the configuration information.

[0044] After initially determining the isolation between the transmit and receive beams and determining a first power amplification factor based on the isolation, the relay device can re-determine the isolation between the transmit and receive beams and re-determine the first power amplification factor based on the re-determined isolation. At this point, it can send at least one of the following to the network device: relay capability, its own device type, and the already determined isolation between the transmit and receive beams, for the network device to determine the configuration information for the reference signal.

[0045] In one possible implementation, determining the receive power of the relay device's receiving beam for receiving the reference signal includes: transmitting the reference signal using the transmitting beam at the transmit power of the reference signal; receiving the reference signal using the receiving beam; and determining the receive power of the receiving beam for receiving the reference signal. Configuration information is used to indicate the resources of the corresponding reference signal, and the transmitting beam can be used to transmit the reference signal at the transmit power of the reference signal on the resources indicated by the configuration information.

[0046] In one possible implementation, the method further includes: when a repeated power determination condition is met, increasing the transmission power of the reference signal and repeatedly executing the receive power determination process until a termination condition is reached; the repeated power determination condition includes: the received power is less than a receive power threshold and / or the receive beam does not receive the reference signal; the termination condition includes at least one of the following: the isolation determined based on the transmission power and the received power is less than an isolation threshold, the increased transmission power is greater than a transmission power threshold, and the number of repeated executions is greater than a number threshold. It should be noted that the transmission power in the termination condition refers to the increased transmission power, and the received power refers to the received power obtained according to the aforementioned receive power determination process.

[0047] For example, the receive power determination process may include: transmitting the reference signal using the transmit beam at an enhanced transmit power of the reference signal; receiving the reference signal using the receive beam; and determining the receive power of the receive beam when receiving the reference signal.

[0048] The number of configuration information items is one or more. The relay device can use a transmit beam to transmit one or more reference signals corresponding to each configuration information item according to the transmit power determined by each configuration information item, and use a receive beam to receive one or more reference signals corresponding to each configuration information item, and then determine the receive power of one or more reference signals corresponding to each configuration information item.

[0049] For any given configuration information, in one example, that configuration information corresponds to a reference signal. The relay device can use a transmit beam to transmit the reference signal corresponding to that configuration information at a transmit power determined according to the configuration information, and use a receive beam to receive the reference signal corresponding to that configuration information. The receive power of the reference signal corresponding to that configuration information is then determined.

[0050] In another example, each configuration information corresponds to multiple reference signals, meaning there are multiple reference signals with the same transmission power. The relay device can use a transmit beam to repeatedly transmit the reference signals corresponding to the configuration information multiple times at the transmission power determined by the configuration information, and use a receive beam to repeatedly receive the reference signals corresponding to the configuration information. Then, the multiple receive powers of the reference signals corresponding to the configuration information are determined. The number of times the reference signals are repeatedly transmitted is the same as the number of reference signals, and the number of received powers of the reference signals is the same as the number of reference signals. This allows the network device to determine a lower transmission power based on the configuration information, enabling the relay device to transmit the reference signals corresponding to the configuration information at a lower transmission power. This reduces interference to the communication system during the transmission of the reference signals, and repeatedly transmitting the reference signals improves the accuracy of subsequent isolation determination based on the reference signals.

[0051] In this example, the relay device can transmit the reference signal corresponding to the configuration information multiple times using a transmit beam at a fixed repetition number. This repetition number can be preset by the relay device or determined based on the configuration information. For example, the repetition number can be determined based on the repetition factor defined in the resource pattern information included in the configuration information.

[0052] Alternatively, after initially transmitting the reference signal corresponding to the configuration information using the transmit beam, the relay device may repeatedly execute the first receive power determination process until a first termination condition is met, provided that the first repeat determination power condition is satisfied. The first receive power determination process includes: the relay device transmitting the reference signal corresponding to the configuration information using the transmit beam at the transmit power determined by the configuration information; the relay device receiving the reference signal corresponding to the configuration information using the receive beam; and the relay device determining the receive power of the receive beam for receiving the reference signal corresponding to the configuration information. The first repeat determination power condition may include at least one of the following: the receive power of the reference signal corresponding to the configuration information is not obtained; the receive power of the obtained reference signal is less than a receive power threshold; and the receive beam does not receive the reference signal corresponding to the configuration information. The first termination condition may include: the isolation determined based on the transmit power and receive power is less than an isolation threshold and / or the number of repetitions is greater than a number threshold. The transmit power in the first termination condition refers to the transmit power determined by the configuration information, and the receive power refers to the receive power obtained according to the aforementioned first receive power determination process.

[0053] In another example, any given configuration information corresponds to multiple reference signals, meaning there are multiple reference signals with different transmission powers. The repeater can use a transmit beam to transmit the reference signal corresponding to the configuration information once at a transmission power determined by the configuration information, and use a receive beam to receive the reference signal. Then, the transmission power of the reference signal corresponding to the configuration information is increased, and the transmit beam is used to transmit the reference signal one or more times at the increased transmission power. The total number of times the reference signal is transmitted is the number of reference signals, and the number of received signals is the same as the total number of times the reference signal corresponding to the configuration information is transmitted. The increased transmission power can be determined based on the historical transmission power of the reference signal corresponding to the configuration information. For example, the historical transmission power is the transmission power of the most recent reference signal corresponding to the configuration information. For instance, the increased transmission power can be the sum of the historical transmission power and the power ramping step. The power ramping step can be preset by the repeater or determined based on the configuration information. For example, it can be determined based on the power ramping step (PowerRampingStepILM) parameter included in the configuration information. In this way, when determining configuration information, network devices can initially set a lower transmission power value based on the configuration information, gradually increasing the transmission power of the reference signal thereafter. This allows relay devices to initially transmit the reference signal corresponding to the configuration information at a lower transmission power, thereby reducing interference to the communication system during the transmission of the reference signal.

[0054] In one possible implementation, for multiple transmit beams and multiple receive beams of a relay device, when multiple transmit beams transmit a reference signal corresponding to the same configuration information, each transmit beam can transmit the reference signal corresponding to the configuration information in chronological order, and correspondingly, each receive beam receives the reference signal corresponding to the configuration information in chronological order.

[0055] In one possible implementation, the method further includes: receiving a third power amplification factor sent by other devices; when the third power amplification factor is less than or equal to the isolation between the transmitting beam and the receiving beam, forwarding the signal to be forwarded received by the receiving beam to the transmitting beam based on the third power amplification factor; when the third power amplification factor is greater than the isolation between the transmitting beam and the receiving beam, forwarding the signal to be forwarded received by the receiving beam to the transmitting beam based on the first power amplification factor. This can prevent the relay device from self-oscillating due to an excessively large third power amplification factor indicated by other devices, thereby improving communication performance.

[0056] In one possible implementation, the method further includes: determining the transmission power of the auxiliary transmit beam of the auxiliary relay device for transmitting an auxiliary reference signal; determining the reception power of the receive beam for receiving the auxiliary reference signal; and determining the isolation between the transmit beam and the receive beam based on the transmission power and reception power of the reference signal, comprising: determining the isolation between the transmit beam and the receive beam based on the transmission power and reception power of the reference signal and the transmission power and reception power of the auxiliary reference signal.

[0057] Secondly, this application provides a relay device, the relay device comprising: a processing module, configured to determine the transmission power of a reference signal transmitted by a transmitting beam of the relay device; the processing module further configured to determine the reception power of the reference signal received by a receiving beam of the relay device; the processing module further configured to determine the isolation degree between the transmitting beam and the receiving beam based on the transmission power and reception power of the reference signal; the processing module further configured to determine a first power amplification factor for signal transmission between the transmitting beam and the receiving beam based on the isolation degree between the transmitting beam and the receiving beam, wherein the first power amplification factor is less than the isolation degree; and a transmitting module configured to forward the signal to be forwarded received by the receiving beam to the transmitting beam based on the first power amplification factor.

[0058] In one possible implementation, the processing module is specifically configured to determine the power amplification factor corresponding to the isolation between the transmitted beam and the received beam as the first power amplification factor based on the mapping relationship between isolation and power amplification factor.

[0059] In one possible implementation, the mapping relationship includes a correspondence between multiple isolation intervals and multiple power amplification factors; the processing module is specifically used to determine the target isolation interval to which the isolation between the transmitted beam and the received beam belongs in the multiple isolation intervals; and to determine the power amplification factor corresponding to the target isolation interval as the first power amplification factor.

[0060] In one possible implementation, the left endpoint value of the first isolation interval is greater than the left endpoint value of the second isolation interval, the right endpoint value of the first isolation interval is greater than the right endpoint value of the second isolation interval, and the power amplification factor corresponding to the first isolation interval is greater than the power amplification factor corresponding to the second isolation interval; wherein, the first isolation interval and the second isolation interval are any two isolation intervals among the plurality of isolation intervals.

[0061] In one possible implementation, each of the plurality of power amplification factors is less than or equal to the left endpoint value of the corresponding isolation interval.

[0062] In one possible implementation, the mapping relationship is configured by the network device and sent to the relay device, or the mapping relationship is pre-stored in the relay device.

[0063] In one possible implementation, the power control parameters include at least one of the following: power value, initial transmission power of the reference signal, maximum transmission power of the reference signal, transmission power ramp-up step of the reference signal, second power amplification factor of the target signal when transmitted between the transmission beam and the receiving beam, receiving power of the receiving beam receiving the target signal, and quality of the receiving beam receiving the target signal; wherein the target signal is a signal sent to the relay device by other devices connected to the relay device.

[0064] In one possible implementation, the number of reference signals is one or more, the number of configuration information is one or more, and one configuration information corresponds to one or more reference signals.

[0065] In one possible implementation, the transmitting module is further configured to transmit the relay capability of the relay device to the network device, the relay capability being used by the network device to determine the configuration information; wherein the relay capability includes at least one of the following: the maximum isolation, maximum amplification factor, maximum transmit power, power margin, amplification margin, measurement capability, and number of beams of the relay device.

[0066] In one possible implementation, the transmitting module is further configured to send a configuration request to the network device when the pre-configured power amplification factor between the transmitting beam and the receiving beam is not within a first range, the configuration request being used to request the network device to determine the configuration information.

[0067] In one possible implementation, the transmitting module is further configured to transmit the isolation degree between the transmitting beam and the receiving beam to the network device, the isolation degree being used by the network device to re-determine the configuration information.

[0068] In one possible implementation, the processing apparatus is specifically configured to transmit the reference signal using the transmit beam at the transmit power of the reference signal; receive the reference signal using the receive beam; and determine the receive power of the receive beam when receiving the reference signal.

[0069] In one possible implementation, the processing device is further configured to increase the transmission power of the reference signal when the repeated power determination condition is met, and repeatedly execute the receive power determination process until an end condition is reached; the repeated power determination condition includes: the receive power is less than a receive power threshold and / or the receive beam does not receive the reference signal; the end condition includes at least one of the following: the isolation determined based on the transmission power and the receive power is less than an isolation threshold, the increased transmission power is greater than a transmission power threshold, and the number of repeated executions is greater than a number threshold.

[0070] In one possible implementation, the relay device further includes: a receiving module for receiving a third power amplification factor sent by other devices; the transmitting module is further configured to, when the third power amplification factor is less than or equal to the isolation between the transmitting beam and the receiving beam, forward the signal to be forwarded received by the receiving beam to the transmitting beam based on the third power amplification factor; and when the third power amplification factor is greater than the isolation between the transmitting beam and the receiving beam, forward the signal to be forwarded received by the receiving beam to the transmitting beam based on the first power amplification factor.

[0071] Thirdly, this application provides a communication device, the communication device comprising: one or more processors; a memory for storing one or more computer programs or instructions; wherein when the one or more computer programs or instructions are executed by the one or more processors, the one or more processors perform the method as described in any one of the first aspects.

[0072] Fourthly, this application provides a communication device, comprising a processor for executing the method as described in any of the first aspects; or for executing a computer program or instructions in the processor such that the communication device implements the method as described in any of the first aspects.

[0073] When the communication device is a chip, the sending and receiving in the above method correspond to output and input, respectively.

[0074] Fifthly, this application provides a computer-readable storage medium including a computer program or instructions that, when executed on a computer, cause the computer to perform the method described in any one of the first aspects.

[0075] In a sixth aspect, this application provides a computer program product comprising computer program code, which, when run on a computer, causes the computer to perform the method described in any one of the first aspects.

[0076] In a seventh aspect, this application provides a communication system, the communication system including a relay device as described in any of the second to fourth aspects; the communication system further includes: a terminal device and / or a network device, the terminal device and / or the network device being used to send a signal to be forwarded to the relay device.

[0077] In one possible implementation, the relay device is configured to: determine the transmission power of the reference signal transmitted by the relay device's transmitting beam; determine the reception power of the reference signal received by the relay device's receiving beam; determine the isolation between the transmitting beam and the receiving beam based on the transmission power and reception power of the reference signal; determine a first power amplification factor for signal transmission between the transmitting beam and the receiving beam based on the isolation factor, wherein the first power amplification factor is less than the isolation factor; and forward the signal to be forwarded received by the receiving beam to the transmitting beam based on the first power amplification factor.

[0078] In one possible implementation, the relay device is specifically used to determine the power amplification factor corresponding to the isolation between the transmitting beam and the receiving beam as the first power amplification factor based on the mapping relationship between isolation and power amplification factor.

[0079] In one possible implementation, the mapping relationship includes a correspondence between multiple isolation intervals and multiple power amplification factors; the relay device is specifically used to determine the target isolation interval to which the isolation between the transmitting beam and the receiving beam belongs in the multiple isolation intervals; and to determine the power amplification factor corresponding to the target isolation interval as the first power amplification factor.

[0080] In one possible implementation, the left endpoint value of the first isolation interval is greater than the left endpoint value of the second isolation interval, the right endpoint value of the first isolation interval is greater than the right endpoint value of the second isolation interval, and the power amplification factor corresponding to the first isolation interval is greater than the power amplification factor corresponding to the second isolation interval; wherein, the first isolation interval and the second isolation interval are any two isolation intervals among the plurality of isolation intervals.

[0081] In one possible implementation, each of the plurality of power amplification factors is less than or equal to the left endpoint value of the corresponding isolation interval.

[0082] In one possible implementation, the mapping relationship is configured by the network device and sent to the relay device, or the mapping relationship is pre-stored in the relay device.

[0083] In one possible implementation, the relay device is further configured to acquire the mapping relationship between the isolation and the power amplification factor. When the mapping relationship is pre-stored in the relay device, the relay device is specifically configured to acquire the stored mapping relationship. When the mapping relationship is configured by a network device and sent to the relay device, the network device is specifically configured to send the mapping relationship to the relay device; the relay device is specifically configured to receive the mapping relationship. For example, the network device is specifically configured to determine the mapping relationship and send the indication information to the relay device, the indication information indicating the mapping relationship; the relay device is specifically configured to acquire the mapping relationship based on the received indication information.

[0084] In one possible implementation, the network device is configured to determine configuration information of the reference signal and send the configuration information to the relay device, the configuration information including power control parameters; the relay device is configured to determine the transmission power of the reference signal based on the power control parameters in the received configuration information.

[0085] In one possible implementation, the power control parameters include at least one of the following: power value, initial transmission power of the reference signal, maximum transmission power of the reference signal, transmission power ramp-up step of the reference signal, second power amplification factor of the target signal when transmitted between the transmission beam and the receiving beam, receiving power of the receiving beam receiving the target signal, and quality of the receiving beam receiving the target signal; wherein the target signal is a signal sent to the relay device by other devices connected to the relay device.

[0086] In one possible implementation, the number of reference signals is one or more, the number of configuration information is one or more, and one configuration information corresponds to one or more reference signals.

[0087] In one possible implementation, the relay device is further configured to send the relay capability of the relay device to the network device; the network device is specifically configured to determine the configuration information based on the relay capability; wherein the relay capability includes at least one of the following: the maximum isolation, maximum amplification factor, maximum transmit power, power margin, amplification margin, measurement capability, and number of beams of the relay device.

[0088] In one possible implementation, the relay device is further configured to determine a pre-configured power amplification factor between the transmitting beam and the receiving beam; when the pre-configured power amplification factor between the transmitting beam and the receiving beam is not within a first range, it sends a configuration request to the network device; the network device is specifically configured to determine the configuration information based on the received configuration request.

[0089] In one possible implementation, the relay device is further configured to send the isolation degree between the transmit beam and the receive beam to the network device; specifically, the network device is configured to re-determine the configuration information based on the received isolation degree between the transmit beam and the receive beam.

[0090] In one possible implementation, the relay device is specifically configured to transmit the reference signal using the transmit beam at the transmit power of the reference signal; receive the reference signal using the receive beam; and determine the receive power of the receive beam for receiving the reference signal.

[0091] In one possible implementation, the relay device is specifically configured to increase the transmission power of the reference signal and repeatedly execute the receive power determination process when the repeated power determination condition is met, until the termination condition is reached; the repeated power determination condition includes: the receive power is less than the receive power threshold and / or the receive beam does not receive the reference signal; the termination condition includes at least one of the following: the isolation determined based on the transmission power and the receive power is less than the isolation threshold, the increased transmission power is greater than the transmission power threshold, and the number of repeated executions is greater than the number of executions threshold.

[0092] In one possible implementation, the network device is further configured to determine a pre-configured power amplification factor between the transmit beam and the receive beam; and to determine the configuration information when the pre-configured power amplification factor is not within a second range.

[0093] In one possible implementation, the relay device is further configured to receive a third power amplification factor transmitted by other devices; when the third power amplification factor is less than or equal to the isolation between the transmitting beam and the receiving beam, the relay device forwards the signal to be forwarded received by the receiving beam to the transmitting beam based on the third power amplification factor; when the third power amplification factor is greater than the isolation between the transmitting beam and the receiving beam, the relay device forwards the signal to be forwarded received by the receiving beam to the transmitting beam based on the first power amplification factor. Attached Figure Description

[0094] Figure 1 This application provides a schematic diagram of the structure of a communication system according to an embodiment of the present application.

[0095] Figure 2 This application provides a schematic diagram of the structure of a network device according to an embodiment of the present application.

[0096] Figure 3 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this application;

[0097] Figure 4 This is a schematic diagram of the structure of a relay device provided in an embodiment of this application;

[0098] Figure 5 This is a schematic diagram of another relay device provided in an embodiment of this application;

[0099] Figure 6 A schematic flowchart illustrating a signal transmission method provided in an embodiment of this application;

[0100] Figure 7 A flowchart illustrating another signal transmission method provided in an embodiment of this application;

[0101] Figure 8 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0102] Figure 9 A block diagram of a signal transmission device provided in an embodiment of this application;

[0103] Figure 10 This is a schematic diagram of another communication device provided in an embodiment of this application. Detailed Implementation

[0104] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0105] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0106] The terms "first" and "second," etc., used in the specification and claims of this application are used to distinguish different objects, rather than to describe a specific order of objects. For example, "first range" and "second range," etc., are used to distinguish different ranges, rather than to describe a specific order of ranges.

[0107] In the embodiments of this application, the words "in one example," "examplely," or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "in one example," "examplely," or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the words "in one example," "examplely," or "for example" is intended to present the relevant concepts in a specific manner.

[0108] In the description of the embodiments in this application, unless otherwise stated, "at least one" means one or more, and "multiple" means two or more. For example, multiple processing units refer to two or more processing units; multiple systems refer to two or more systems.

[0109] A communication system typically includes at least one network device, at least one terminal device, and at least one relay device. Each network device establishes communication connections with some or all of the terminal devices, and at least one relay device can be configured between the network devices and terminal devices with established communication connections. When there are multiple network devices, the relay devices establishing communication connections with different network devices can be the same or different. When there are multiple terminal devices, the relay devices establishing communication connections with different terminal devices can also be the same or different. The terminal device is also called user equipment (UE).

[0110] A relay device includes a transmitting antenna and a receiving antenna. The transmitting antenna includes at least one transmitting beam, and the receiving antenna includes at least one receiving beam. The receiving beam is used to receive signals transmitted by the upstream device and transmit the received signals back to the transmitting beam. The signal is amplified during transmission to the transmitting beam. The transmitting beam is used to transmit the amplified received signal to the downstream device. When the relay device establishes communication connections with multiple upstream devices, the receiving antenna may include multiple receiving beams, each corresponding to one upstream device. When the relay device establishes communication connections with multiple downstream devices, the transmitting antenna may include multiple transmitting beams, each corresponding to one downstream device. It should be noted that the transmitting and receiving antennas in the relay device are not fixed. During signal transmission, the antenna used to receive signals is the receiving antenna, and the antenna used to transmit signals is the transmitting antenna.

[0111] In this application embodiment, the communication system may include a 4th Generation Mobile Communication Technology (4G) communication system, a 5th Generation Mobile Communication Technology (5G) communication system, a future evolution system, or a converged system of multiple communication technologies. The 4G communication system may include a Long Term Evolution (LTE) communication system and a Cloud Radio Access Network (CRAN) communication system. The 5G communication system may include a New Radio (NR) communication system and an evolved Public Land Mobile Network (PLMN) communication system.

[0112] The communication system supports bidirectional communication. Optionally, the communication system can achieve bidirectional communication through methods such as Frequency Division Duplexing (FDD) or Time Division Duplexing (TDD). Bidirectional communication includes uplink and downlink communication. In uplink communication, signals are transmitted from the terminal device to the network device, and in downlink communication, signals are transmitted from the network device to the terminal device. For uplink communication, the antenna in the relay device used to receive signals sent by the terminal device is the receiving antenna, and the antenna used to send signals to the network device is the transmitting antenna. The upstream device can be the upstream relay device or the terminal device, and the downstream device can be the downstream relay device or the network device. For downlink communication, the antenna in the relay device used to receive signals sent by the network device is the receiving antenna, and the antenna used to send signals to the terminal device is the transmitting antenna. The upstream device can be the upstream relay device or the network device, and the downstream device can be the downstream relay device or the terminal device. Therefore, it can be seen that the transmitting beam of the relay device in uplink communication is the receiving beam in downlink communication, and the receiving beam in uplink communication is the transmitting beam in downlink communication. The upstream device in uplink communication is the downstream device in downlink communication, and the downstream device in uplink communication is the upstream device in downlink communication.

[0113] In uplink communication, the transmitting antenna (hereinafter referred to as the uplink transmitting antenna) and in downlink communication, the receiving antenna (hereinafter referred to as the downlink receiving antenna) can be the same or different physical antennas, and the transmitting beam of the uplink transmitting antenna and the receiving beam of the downlink receiving antenna can be the same or different.

[0114] It should be noted that the system architecture and business scenarios described in the embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0115] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a communication system provided in an embodiment of this application. The communication system 10 includes a network device 101, three relay devices (relay devices 102 to 104), and four terminal devices (terminal devices 105 to 108). Network device 101 establishes communication connections with relay devices 102 and 103, relay device 102 establishes a communication connection with relay device 104, relay device 103 establishes a communication connection with terminal devices 105 and 108, and relay device 104 establishes a communication connection with terminal devices 105 to 107. Transmission direction a represents uplink communication, and transmission direction b represents downlink communication.

[0116] like Figure 1 As shown, relay device 102 includes two beams corresponding to network device 101 and relay device 104, respectively. Figure 1 (Not shown). Relay device 103 includes three beams corresponding to network device 101, terminal device 105, and terminal device 108, respectively. Relay device 104 includes four beams corresponding to relay device 102 and terminal devices 105 to 107, respectively.

[0117] For uplink communication (i.e., signal transmission in direction a), in relay device 102, the beam corresponding to relay device 104 is the receiving beam, and the beam corresponding to network device 101 is the transmitting beam. The upstream device is relay device 104, and the downstream device is network device 101. In relay device 103, the two beams corresponding to terminal devices 105 and 108 are receiving beams, and the beam corresponding to network device 101 is the transmitting beam. The upstream device is terminal device 105 or 108, and the downstream device is network device 101. In relay device 104, the three beams corresponding to terminal devices 105 to 107 are receiving beams, and the beam corresponding to relay device 102 is the transmitting beam. The upstream device is any one of terminal devices 105 to 107, and the downstream device is relay device 102. In downlink communication (i.e., signal transmission in direction b), the transmitting beam, receiving beam, upstream device, and downstream device of each relay device can be referred to the relevant description of uplink communication, which will not be repeated here in the embodiments of this application.

[0118] It should be noted that, Figure 1 The number and connection relationships of network devices, relay devices, and terminal devices in the communication system shown are merely illustrative examples, and the embodiments of this application do not limit this.

[0119] In this embodiment, the network equipment may include base stations, relay stations, and access points. Base stations may include base stations in 4G communication systems and base stations in 5G communication systems. Specifically, base stations in 4G communication systems may include evolved NodeBs (eNBs) in LTE communication systems and radio controllers in CRAN communication systems. Base stations in 5G communication systems may include base stations in NR communication systems and network equipment, wearable devices, and vehicle-mounted equipment in PLMN communication systems.

[0120] Please refer to Figure 2 , Figure 2This is a schematic diagram of a network device provided in an embodiment of this application. The network device 20 may include a processor 201, a memory 202, and a transceiver 203. The transceiver 203 includes a transmitter 2031, a receiver 2032, and an antenna unit 2033, with the antenna unit 2033 including at least one antenna. The memory 202 stores computer programs or instructions, and the processor is used to call the computer programs or instructions stored in the memory to implement the methods required by the network device in this embodiment of the application. The receiver 2032 can receive signals and / or signal transmission parameters sent by other devices (e.g., relay devices or terminal devices) connected to the network device 20 through the antenna unit 2033. The transmitter 2031 can send signals and / or signal transmission control parameters to other devices connected to the network device 20 through the antenna unit 2033. These signal transmission control parameters are used to control signal transmission.

[0121] In this application embodiment, the terminal device may include: an access terminal, a terminal unit, a terminal station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a wireless communication device, a terminal agent, and a terminal apparatus, etc. The access terminal may include: a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device, other processing devices connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network, or a terminal device in an evolved PLMN network, etc.

[0122] Please refer to Figure 3 , Figure 3 This is a schematic diagram of a terminal device provided in an embodiment of this application. The terminal device 30 includes a processor 301, a memory 302, and a transceiver 303. The transceiver 303 includes a transmitter 3031, a receiver 3032, and an antenna unit 3033, which includes at least one antenna. The functions of each part of this terminal device can be referred to the relevant description of the aforementioned network device 20, and will not be repeated here in this embodiment of the application.

[0123] In this embodiment, the relay device can be considered a special type of terminal device, possessing signal forwarding and amplification functions. The relay device may also include at least one of the following functions: shifting the carrier frequency of the signal, demodulating and remodulating the signal before forwarding, or denoising the signal before forwarding. The relay device may include: amplification and forwarding devices, demodulation and forwarding devices, frequency-shifting and forwarding devices, noise-reducing and forwarding devices, reflectors, reflective surfaces, intelligent reflectors, intelligent reflecting surfaces, reflective arrays, intelligent reflecting arrays, backscattering devices, passive devices, semi-passive devices, ambient signal devices, and reconfigurable intelligent surfaces (RIS), etc.

[0124] Please refer to Figure 4 , Figure 4 This is a schematic diagram of a relay device provided in an embodiment of this application. The relay device 40 may include a controller 401, a signal amplifier 402, a first antenna unit 403, and a second antenna unit 404. Both the first antenna unit 403 and the second antenna unit 404 include at least one antenna, and these two antenna units may correspond to two different antenna panels. Optionally, the first antenna unit 403 may establish a communication connection with a network device, and the second antenna unit 404 may establish a communication connection with a terminal device. Alternatively, the first antenna unit 403 may establish a communication connection with a terminal device, and the second antenna unit 404 may establish a communication connection with a network device. The antenna in the first antenna unit 403 or the second antenna unit 404 may be a transmitting antenna for transmitting signals or a receiving antenna for receiving signals. The function of the antenna in any antenna unit is related to the signal transmission direction, and the relevant description can be referred to the foregoing process; this embodiment of the application will not repeat it here.

[0125] The controller 401 establishes a communication connection with the network device through an antenna unit, and is used to establish the communication connection and beam alignment between the network device and the relay device 40. The controller 401 can also be used to control the operation of the relay device 40. In one example, the controller 401 can control the relay device 40 to transmit signals based on signal transmission parameters received from the network device. These signal transmission parameters may include the relay device 40's operating time, operating status, and operating mode. In another example, the controller 401 can control the operating mode of the relay device 40 based on the operating signals sent by the terminal device. In yet another example, the controller 401 can determine the operating status of the relay device 40 (e.g., power amplification factor and phase) based on the relay capability of the relay device 40.

[0126] The relay device 40 may include a high-frequency device with beamforming capability; that is, both the first antenna element 403 and the second antenna element 404 of the relay device 40 may include / form multiple beams. Optionally, multiple beams with the same or similar communication characteristics may be considered as a single beam. A beam may include one or more antenna ports for transmitting data channels, control channels, and detection signals, etc. One or more antenna ports forming a beam may also be considered as a set of antenna ports. The beam is directional in space. The signal strength distribution formed by the signal transmitted by the transmitting antenna in different directions in space is the transmitting beam, and the signal strength distribution formed by the signal received by the receiving antenna in different directions in space is the receiving beam. The transmitting beam and the receiving beam may be the same or different. When the signal is transmitted between the transmitting beam and the receiving beam, it passes through the signal amplifier 402. The signal amplifier 402 amplifies the received signal according to the power amplification factor, which is the power amplification factor of the signal transmission between the transmitting beam and the receiving beam.

[0127] In the NR protocol, beams can be represented by spatial filters, spatial filters, or spatial parameters. Correspondingly, the transmission beam (Tx beam) can be a spatial domain transmission filter, a spatial domain transmit filter, or a spatial domain transmit parameter; the reception beam (Rx beam) can be a spatial domain receiver filter, a spatial domain receive filter, or a spatial domain receive parameter.

[0128] In this embodiment of the application, the beam can be represented by the transmission configuration indication (TCI) status, and further, it can be represented by the quasi-co-location (QCL) relationship in the TCI.

[0129] It should be understood that the representation of beams in the NR protocols listed above is merely illustrative, and the embodiments of this application do not limit the representation of beams in various protocols. This application does not preclude the possibility of defining other terms to represent the same or similar meanings in future protocols.

[0130] Furthermore, beams can be wide beams, narrow beams, or other types of beams. Beamforming techniques can include beamforming technology or other technologies. Beamforming technology can be digital beamforming technology, analog beamforming technology, or hybrid digital / analog beamforming technology. Different beams can be considered different resources. The same information or different information can be transmitted through different beams.

[0131] Please refer to Figure 5 , Figure 5This is a schematic diagram of another relay device provided in an embodiment of this application. The first antenna unit 403 in the relay device 40 includes M antenna arrays (antenna arrays 1 to M), where M > 1. The second antenna unit 404 includes N antenna arrays (antenna arrays M+1 to M+N), where N > 1. M and N can be equal or unequal. Each antenna array includes at least one antenna. The signals transmitted or received by the same antenna array have the same direction, meaning that the same antenna array can correspond to one beam (also known as one spatial filter). Figure 5 The first antenna element 403 includes M beams ( Figure 5 (Not shown), the second antenna unit 404 includes N beams ( Figure 5 (Not shown). Any beam in an M-antenna array can be represented as F m G m or F m G m F m ={F m，1 F m，1 , ..., F m，k}, G m ={G m，1 , ..., G m，k}, F m G m ={F m，1 G m，1 , ..., F m，k G m，k}, m∈[1,M], k represents the number of antenna ports included in each beam, k>0. The representation of the N beams of the second antenna element 404 can be referred to the first antenna element 403, and will not be repeated here in the embodiments of this application.

[0132] Figure 5 This explanation uses the example of one antenna array corresponding to one beam. Optionally, multiple antenna arrays can also correspond to one beam. For example, L antenna arrays out of the M antenna arrays in the first antenna element 403 can correspond to one beam, where L≤M. The terminal device or network device can also be a high-frequency device with beamforming capability, and the structure of its antenna element can be referenced. Figure 5 The embodiments of this application will not be described in detail here.

[0133] It should be noted that, Figures 2 to 5 The structures of the various devices described are merely illustrative; each device may include at least one unit or component. For example... Figure 4 or Figure 5 The relay device 40 shown may include multiple signal amplifiers, each corresponding to a different polarization direction or a different wireless radio frequency channel. This application embodiment does not limit the structure of each device or the number of units or components included.

[0134] Currently, in relay equipment, the signal is amplified during transmission from the receiving beam to the transmitting beam. Typically, the receiving and transmitting beams correspond to different physical entities to avoid interference between the signals transmitted and received. However, even when physically separated, the signal transmitted by the transmitting beam is still amplified and transmitted to the receiving beam when it reaches the next-level device.

[0135] When the power amplification factor (also known as transmission gain or amplification factor) between the transmitting and receiving beams is large—for example, when the power amplification factor exceeds the path loss during signal transmission between the transmitting and receiving beams—the power of the signal transmitted from the transmitting beam to the receiving beam will gradually increase until it exceeds the normal operating range of the repeater equipment, causing the repeater equipment to oscillate. This leads to signal distortion in the repeater equipment, affecting signal transmission in the communication system and resulting in poor communication performance. Therefore, providing an effective signal transmission method has become an urgent technical problem to be solved.

[0136] This application provides a signal transmission method that determines the isolation between the transmitting beam and the receiving beam of a relay device, determines a first power amplification factor for signal transmission between the transmitting beam and the receiving beam based on the isolation, and then forwards the signal to be forwarded received by the receiving beam to the transmitting beam based on the first power amplification factor.

[0137] In this application embodiment, there are various ways to determine the isolation between the transmit beam and the receive beam of the relay device. In one implementation, the isolation between the transmit beam and the receive beam can be determined based on the transmission of a reference signal between the transmit beam and the receive beam of the relay device.

[0138] In another implementation, a first isolation degree between the first transmit beam and the receive beam can be determined based on the transmission of the first reference signal between the first transmit beam and the first receive beam of the relay device; a second isolation degree between the second transmit beam and the receive beam of the relay device can be determined based on the transmission of the second reference signal between the second transmit beam of another device and the receive beam of the relay device. Then, the isolation degree between the first transmit beam and the receive beam is determined based on the first isolation degree and the second isolation degree. Other devices may include other relay devices different from this relay device.

[0139] Corresponding to the first method for determining the isolation between the transmitting and receiving beams of a relay device, this application provides a signal transmission method, please refer to... Figure 6 , Figure 6This is a flowchart illustrating a signal transmission method provided in an embodiment of this application. This method can be applied to devices in the aforementioned communication system. For example, the method can be applied to any relay device (e.g., a controller included in the relay device) and a network device that has established a communication connection with that relay device in the aforementioned communication system. The following embodiments use a communication system with both uplink and downlink transmission directions as an example for illustration. For embodiments of communication systems with only one transmission direction, the following flowchart can be referred to, and will not be repeated in the embodiments of this application. The method may include the following processes:

[0140] 501. The network device determines the configuration information of the reference signal.

[0141] In this embodiment of the application, the reference signal can be the Isolation Measurement Reference Signal (ILM-RS), and the following description will use ILM-RS as an example.

[0142] Configuration information can be used to indicate ILM-RS resources. Each configuration information can indicate one or more ILM-RS resources or a set of one or more ILM-RS resources. Optionally, the resources of the corresponding ILM-RS indicated by the configuration information can include at least one of the following: sounding reference signal (SRS) resources, physical random access channel (PRACH) resources, channel state information reference signal (CSI-RS) resources, demodulation reference signal (DMRS) resources, positioning reference signal (PRS), phase tracking reference signal (PTRS) resources, and received signal strength indicator (RSSI) resources. PRACH resources can include random access occasions (RACH occasions) and random access preambles. It should be noted that CSI-RS resources are applicable to downlink transmission scenarios of ILM-RS.

[0143] Network devices can determine the configuration information of ILM-RS based on at least one of the following configuration reference information: the relay capability of the relay device, the information on the relay device's own device type, and the historical isolation between the transmit beam used to transmit ILM-RS and the receive beam used to receive ILM-RS, etc. This configuration reference information can be sent by the relay device to the network device, or it can be determined by the network device. This application does not limit the process for determining the configuration reference information.

[0144] Taking the configuration reference information sent by the relay device to the network device as an example, the relay device can first establish a communication connection with the network device, and then send the configuration reference information to the network device based on the established communication connection. Please refer to the above. Figure 4 As shown in Figure 5, the controller included in the relay device can establish a communication connection with the network device through an antenna unit, thereby enabling the relay device to establish a communication connection with the network device.

[0145] In one scenario, where there is no historical isolation between the transmit and receive beams (i.e., the isolation between the transmit and receive beams has never been determined), the network device can determine the configuration information based on relay capability and / or the relay device's own equipment type. In another scenario, where there is historical isolation between the transmit and receive beams (i.e., the isolation between the transmit and receive beams has been determined), the network device can determine the configuration information based on at least one of the following: relay capability, the relay device's own equipment type, and historical isolation.

[0146] Optionally, the information about the relay device's own device type includes the type of relay device, such as: amplified forwarding type, frequency shift forwarding, and noise reduction forwarding.

[0147] Repeater capabilities may include at least one of the following: maximum isolation of the repeater equipment, maximum amplification factor, maximum transmit power, power margin, amplification margin, measurement capability, and number of beams.

[0148] Isolation can be defined as the loss (i.e., power attenuation) of a signal during transmission between the transmitting and receiving beams.

[0149] Amplification factor includes uplink amplification factor and downlink amplification factor. Uplink amplification factor is the ratio of the power of the uplink transmit signal (also called uplink transmit power) to the power of the uplink receive signal (also called uplink receive power). Downlink amplification factor is the ratio of the power of the downlink transmit signal (also called downlink transmit power) to the power of the downlink receive signal (also called downlink receive power). The maximum amplification factor is the maximum amplification factor that the repeater equipment can support.

[0150] Transmission power includes uplink transmission power and downlink transmission power. Uplink transmission power is the power of the uplink transmission beam transmitting signals to network devices, and downlink transmission power is the power of the downlink transmission beam transmitting signals to terminal devices. Power margin is the difference between the maximum transmission power of the relay device and the current transmission power within a subframe.

[0151] Measurement capabilities include at least one of the following: SRS measurement capability, PRACH measurement capability, CSI-RS measurement capability, DMRS measurement capability, PRS measurement capability, PTRS measurement capability, and RSSI measurement capability.

[0152] For example, assuming the configuration reference information includes relay capabilities, the network device determines the configuration information based on the relay capabilities. For instance, assuming the relay device has SRS measurement capabilities, the network device can determine the configuration information used to indicate SRS resources for isolation measurement. As another example, assuming the relay device has RSSI measurement capabilities, the network device can determine the configuration information used to indicate RSSI resources for isolation measurement. As yet another example, if the relay device includes D transmit beams, the network device can determine the configuration information corresponding to at least D ILM-RSs, thus enabling the measurement of the isolation between at least D transmit beams and each receive beam.

[0153] This configuration information is used to instruct subsequent relay devices to transmit ILM-RS, enabling the relay devices to transmit ILM-RS according to the configuration information, and then determine the isolation between the beam used for transmitting ILM-RS and the beam used for receiving ILM-RS based on the ILM-RS. Each configuration information can correspond to one or more ILM-RS. The following explanation uses the beam used for transmitting ILM-RS as the transmitting beam and the beam used for receiving ILM-RS as the receiving beam.

[0154] Configuration information may include power control parameters. These power control parameters may include at least one of the following: the initial transmit power of the ILM-RS, the maximum transmit power of the ILM-RS, the transmit power ramp-up step size of the ILM-RS, the second power amplification factor when the target signal is transmitted between the transmit and receive beams, the receive power of the receive beam receiving the target signal, the quality of the receive beam receiving the target signal, and the power value. Each parameter in the configuration information may be determined based on known parameters in at least one of the following signals, messages, or channels: SRS, PRACH, CSI-RS, Random Access Message 1, and Physical Uplink Shared Channel (PUSCH), etc.

[0155] The initial transmit power of the ILM-RS can be determined based on the p0 parameter known in the SRS or PUSCH, where p0 is the power parameter configured in the SRS or PUSCH. For example, initial transmit power = p0 + Offset. Offset can be determined by the network device based on the relay capability, or determined by the relay device based on the relay capability and sent to the network device, or it can be a preset value, such as 10, 15, or 20. This application embodiment does not limit the value of Offset.

[0156] The transmit power ramping step size of ILM-RS represents the increase in transmit power when the transmit beam used to transmit ILM-RS repeatedly transmits ILM-RS compared to the previous transmission. This increase value can be any value, such as a positive number; however, this embodiment does not limit the power increase value. Optionally, the transmit power ramping step size can be determined based on the power ramping step parameter known in message 1 of the random access procedure. For example, the transmit power ramping step size of ILM-RS = powerRampingStep.

[0157] As mentioned above Figure 4 or Figure 5 As shown, the second power amplification factor of the target signal when transmitted between the transmit and receive beams is the power amplification factor of the signal amplifier between the transmit and receive beams. The target signal is a signal transmitted to the relay equipment by other devices connected to the relay equipment and forwarded by the relay equipment; it differs from ILM-RS. Optionally, the target signal may include at least one of the following signals transmitted between the transmit and receive beams: CSI-RS, DMRS, SRS, PRACH, synchronization signal, pilot signal, neighboring cell interference signal, noise signal, and data signal. The target signal can be transmitted from network devices to the relay equipment (e.g., CSI-RS, DMRS, and synchronization signals), or it can be transmitted from terminal devices to the relay equipment (e.g., SRS and PRACH).

[0158] The received power of the target signal received by the receiving beam can be determined based on the reference signal received power (RSRP). The RSRP can be measured at layer 1 or layer 3.

[0159] The quality of the target signal received by the receiving beam can include RSSI and / or Reference Signal Receiving Quality (RSRQ). RSSI can be the average received power of all target signals received by the receiving beam, i.e., the total power of all subcarriers in the entire frequency band. RSRQ can be determined based on RSRP and RSSI, for example, RSRQ = NRB * RSRP / RSSI, where NRB is the bandwidth of the target signal corresponding to RSSI. RSSI or RSRQ can be measured at layer 1 or layer 3.

[0160] The power value can be any value determined by the network device, or it can be determined by the network device based on at least one of the following parameters: the initial transmit power of the ILM-RS, the maximum transmit power of the ILM-RS, the transmit power ramp-up step size of the ILM-RS, the second power amplification factor when the target signal is transmitted between the transmit beam and the receive beam, the receive power of the receive beam receiving the target signal, and the quality of the receive beam receiving the target signal. Explanations of these parameters can be found in the foregoing description, and will not be repeated here in the embodiments of this application. Several examples of determining the power value based on at least one of the above parameters are described below.

[0161] In one example, the network device can determine the power value based on a power formula and at least one of the parameters mentioned above. The power formula may include:

[0162] P(i)=min{InitialTxPowerILM,maxPowerILM+10log 10 (2 μ ·M(i))+l×PowerRampingStepILM(i)} or:

[0163] P(i)=min{maxPowerILM,InitialTxPowerILM+10log 10 (2 μ ·M(i))+l×PowerRampingStepILM(i)} or:

[0164] P(i)=min{maxPowerILM,InitialTxPowerILM+l×PowerRampingStepILM(i)}

[0165] Where P(i) represents the power value in dBm, i represents the ILM-RS transmission opportunity, μ represents the subcarrier spacing (SCS), M(i) represents the ILM-RS bandwidth, and l represents the number of ramp-up attempts (i.e., the number of times the ILM-RS is retransmitted and / or the number of times the ILM-RS is repeatedly transmitted). i can be the index corresponding to the ILM-RS transmission opportunity, and μ can be the index corresponding to the subcarrier spacing; for example, μ can be 0, 1, 2, 3, 4, 5, 6, 7, etc.

[0166] In another example, the network device can determine the power value based on the second power amplification factor when the target signal is transmitted between the transmit and receive beams. For example, the power value P(i) = a + x, where a represents the second power amplification factor and x represents the power offset value. The network device can determine a and / or x based on the pre-configured power amplification factor of the relay device (e.g., between the transmit and receive beams). In this example, the network device can adjust the final power value according to the actual second power amplification factor, avoiding excessively high or low power values. This improves measurement efficiency when subsequently sending ILM-RS for isolation measurement based on configuration information. Here, x can be any value, such as a positive number, a negative number (e.g., -50), or 0.

[0167] In another example, the network device can determine the power value based on the second power amplification factor of the target signal transmitted between the transmit and receive beams, and the received power of the target signal received by the receive beam. For example, the power value P(i) = a + b + x, where b represents the received power of the target signal received by the receive beam. b is typically measured by the relay device and transmitted to the network device. The network device can reduce the impact of measurement errors in b on the final power value by adjusting x. Furthermore, b may differ for different target signals. For example, the relay device may forward the first and second target signals at different times, such as in different time slots or different Orthogonal Frequency Divided Multiplexing (OFDM) symbols. The received power of the first and second target signals may be different, or the required power amplification factor may be different. In this case, the network device can adjust the final power value by adjusting the value of x, thereby improving measurement efficiency when subsequently sending ILM-RS for isolation measurement based on configuration information. The received power of the target signal can be measured at Layer 1 or Layer 3.

[0168] In another example, the network device can determine the power value based on the second power amplification factor of the target signal during transmission between the transmit and receive beams, and the quality of the target signal received by the receive beam. For example, the power value P(i) = a + c + x, where c represents the quality of the target signal received by the receive beam. Determining the power value using these two parameters reduces the impact of interference in the communication environment on the power value, thereby improving measurement efficiency when subsequently sending ILM-RS for isolation measurement based on configuration information. The quality of the received target signal can be measured at layer 1 or layer 3.

[0169] Optionally, in addition to the aforementioned power control parameters, the configuration information may also include at least one of the following parameters: transmit beam identifier, ILM-RS resource pattern information, and ILM-RS time-frequency location information.

[0170] The transmit beam identifier indicates the transmit beam used to transmit ILM-RS, and it may include the index of the transmit beam or the index of the antenna (i.e., the transmit antenna) corresponding to the transmit beam. For example, when the transmit antenna includes multiple transmit beams, the transmit beam identifier can be the index of the transmit beam; when the transmit antenna includes only one transmit beam, the transmit beam identifier can be the index of the transmit beam or the index of the transmit antenna.

[0171] The resource pattern information of ILM-RS is used to define the configuration information of ILM-RS. The resource pattern information of ILM-RS may include transmission combs (frequency domain), resource maps (time domain), and sequence information. Specifically, the transmission comb (frequency domain) may include the frequency domain combing (or frequency domain density) of ILM-RS. The resource map (time domain) may include at least one of the following: ILM-RS frames, subframes, time slots, OFDM symbols, and time domain repetition counts. The resource map (frequency domain) may include at least one of the following: ILM-RS carrier elements, bandwidth part, resource block location, bandwidth, and frequency domain repetition counts.

[0172] In one implementation, the resource pattern information of the ILM-RS can be determined based on the resource pattern information in the SRS. This implementation is applicable to both uplink and downlink transmission scenarios. For example, resource mapping can be determined based on known resource mapping configuration parameters in the SRS, or based on resource mapping configuration parameters in the SRS associated with the ILM-RS. For instance, the resource mapping of the ILM-RS can be equal to the resource mapping in the SRS. The sequence information of the ILM-RS can be determined based on the sequenceId parameter of the sequence information in the SRS. For instance, the sequence information of the ILM-RS can be equal to the sequenceId.

[0173] The following describes the signaling SRS resource corresponding to resource pattern information in the 3rd generation partnership project (3GPP) 5G protocol (e.g., protocol 38.211 or protocol 38.331). The content in <> is an explanation of the signaling, and some parameters that are not related to the embodiments of this application have been omitted.

[0174]

[0175]

[0176]

[0177] The time-domain start symbol of ILM-RS is as follows: and Indicates the number of symbols in a time slot. This refers to nrofSymbols in the protocol, lo ffset This refers to startPosition in the protocol.

[0178] In another implementation, the resource pattern information of ILM-RS can be determined based on the resource pattern information in CSI-RS. This implementation is suitable for downlink transmission scenarios. For example, resource mapping can be determined based on known resource mapping configuration parameters in CSI-RS, or based on resource mapping configuration parameters in the CSI-RS associated with ILM-RS. For instance, the resource mapping of ILM-RS can be equal to the resourceMapping in CSI-RS. The sequence information of ILM-RS can be determined based on the scrambling identity document (scramblingID) parameter or the sequence generation configuration parameter in CSI-RS. For instance, the sequence information of ILM-RS can be equal to the scramblingID or the sequence generation configuration parameter.

[0179] The following describes the signaling non-zero power CSI-RS resources (NZP-CSI-RS-RE) and CSI-RS-Resource-Mobility corresponding to resource pattern information in 3GPP 5G protocols (e.g., 38.211 or 38.331). The content in <> is an explanation of the signaling, and some parameters that are not related to the embodiments of this application have been omitted.

[0180]

[0181]

[0182] The time, frequency, and location information of the ILM-RS indicates the time, frequency, and location of ILM-RS transmission, to avoid interference with the transmission of signals to be forwarded during ILM-RS transmission in the communication system, thus ensuring normal communication. This ILM-RS time, frequency, and location information can be determined based on RSSI resources.

[0183] The following describes the signaling RSSI resource configuration ILM (RSSI-ResourceConfigILM) corresponding to time, frequency, and location information in 3GPP 5G protocols (e.g., 38.211 or 38.331). The content in <> is an explanation of the signaling, and some parameters that are not related to the embodiments of this application have been omitted.

[0184]

[0185] In this embodiment, the number of configuration information items is one or more. One configuration information item corresponds to one or more ILM-RS. When there are multiple configuration information items, these multiple configuration information items can be the same or different, and this embodiment does not limit this.

[0186] For a relay device comprising multiple transmit beams, each transmit beam can be used to transmit ILM-RS, and the network device can determine one or more configuration information corresponding to each transmit beam. For any two transmit beams, the corresponding configuration information can be the same or different. For example, for transmit beams with small differences in transmission capacity, the corresponding configuration information can be the same, which reduces the overhead in determining the configuration information. For transmit beams with large differences in transmission capacity, the corresponding configuration information can be different, which improves the accuracy of controlling the transmission power of ILM-RS when subsequently using the transmit beams to transmit ILM-RS.

[0187] Each transmit beam can be used to transmit ILM-RS to multiple receive beams. The number of ILM-RS received by any one of the multiple receive beams can be one or more. The number of configuration information of all ILM-RS received by any one receive beam can be one or more. The configuration information of ILM-RS received by any two receive beams can be the same or different.

[0188] For example, suppose the relay device includes S1 transmit beams and S2 receive beams. For any one transmit beam, the network device can determine T configuration information, where T ≤ S2 or T > S2. The ILM-RS corresponding to the T configuration information can be transmitted between the transmit beam and the S2 receive beams. Optionally, when T ≤ S2, S2 can be equal to K1*T, in which case the configuration information of the ILM-RS received by the K1 receive beams is the same. When T > S2, T can be equal to K2*S2, in which case the number of configuration information of the ILM-RS received by any one receive beam is K2, and the configuration information of the ILM-RS received by any two receive beams is different.

[0189] It should be noted that in communication systems, the locations of network devices and relay devices are typically fixed and their numbers are relatively small, while the number of terminal devices is larger. Correspondingly, the signal area associated with network devices within a relay device is smaller, while the signal area associated with terminal devices is larger. This results in a relatively fixed direction of the communication link between the relay device and the network device, and a smaller number of beams used for communication between the relay device and the network device. Conversely, the communication link between the relay device and the terminal devices has more directions, and a larger number of beams used for communication between the relay device and the terminal devices. For each transmission beam, the network device needs to determine one or more corresponding configuration information. If the number of corresponding configuration information beams for communication between the relay device and the network device is denoted as N1, and the number of corresponding configuration information beams for communication between the relay device and the terminal devices is denoted as N2, then N1 < N2.

[0190] Network devices can determine ILM-RS configuration information based on triggers. For example, a network device can determine configuration information when a first trigger condition is met. This first trigger condition may include at least one of the following: the pre-configured power amplification factor between the transmit and receive beams is not within a first range; the change in the second power amplification factor of the target signal during transmission between the transmit and receive beams is not within a second range; the transmit power of the relay device is not within a third range; the receive power of the target signal is not within a fourth range; the change in the transmit power of the relay device is not within a fifth range; the change in the receive power of the target signal is not within a sixth range; the transmit direction of the transmit beam changes; the receive direction of the receive beam changes; a configuration request is received from the relay device; and the difference between the second power amplification factor and the historical isolation is not within a seventh range. This effectively avoids situations where the relay device self-oscillates due to factors such as an excessively high second power amplification factor, excessively high transmit power, or changes in beam isolation after a change in direction. When the configuration request condition is met, the relay device can send a configuration request to the network device. The configuration request conditions can refer to the first triggering conditions mentioned above, and will not be repeated here in this embodiment of the application.

[0191] The pre-configured power amplification factor represents the power amplification factor pre-configured for the relay device, so that the relay device will forward the signal according to the pre-configured power amplification factor after the current time node. That is, the relay device is not currently forwarding the signal according to the pre-configured power amplification factor.

[0192] The change in the second power amplification factor can be the difference between the second power amplification factors corresponding to any two signal forwarding processes between the transmitting and receiving beams. For example, it can be the difference between the second power amplification factors corresponding to two adjacent signal forwarding processes between the transmitting and receiving beams, or it can be the difference between the second power amplification factors corresponding to two signal forwarding processes with a preset time interval. The changes in the transmitting power of the relay device and the changes in the receiving power of the target signal can be referenced to the change in the second power amplification factor, and will not be elaborated upon in the embodiments of this application.

[0193] The first range can be preset by the network device or sent by the relay device. This first range can include [0, t1], where t1 > 0. t1 can be determined by the network device based on parameters in the defined configuration information, or by the network device based on received configuration reference information, or by the relay device based on the configuration reference information and sent to the network device. Optionally, t1 can be determined by the network device or the relay device based on the maximum amplification factor included in the relay capability. For example, t1 = maximum amplification factor - y, where y can be any value, such as -5, 0, 10, 15, or 20. This application embodiment does not limit the method of determining t1. The second range may include [0, t2], t2 > 0; the third range may include [0, t3], t3 > 0; the fourth range may include [t4, 0], t4 < 0; the fifth range may include [0, t5], t5 > 0; the sixth range may include [0, t6], t6 > 0; and the seventh range may include [0, t7], t7 > 0. The determination methods for t2, t3, t4, t5, t6, and t7 can refer to the determination method for t1, and will not be elaborated further in this embodiment.

[0194] There are many other triggering conditions for network devices to determine configuration information. For example, a network device can determine configuration information when it receives a relay capability sent by a relay device. This application embodiment does not limit the way to trigger a network device to determine configuration information.

[0195] 502. Network devices send configuration information to relay devices.

[0196] Please refer to the above. Figure 4 and Figure 5 The relay device includes a controller that can establish a communication connection with the network device through an antenna unit, so that the relay device and the network device can establish a communication connection. Then, the network device sends configuration information to the relay device based on the established communication connection.

[0197] Optionally, the network device may carry configuration information in PBCH, Remaining minimum system information (RMSI), System Information Block (SIB) 1, SIB2, SIB3, Media Access Control-Control Element (MAC-CE), Downlink Control Information (DCI), Radio Resource Control (RRC), or system information to send configuration information to the relay device.

[0198] 503. The relay device determines the transmission power of the reference signal for transmitting the transmit beam based on the received configuration information.

[0199] The relay equipment includes a transmitting antenna, and the transmitting beam is the beam on the transmitting antenna. The transmitting antenna can be an uplink transmitting antenna or a downlink transmitting antenna, and correspondingly, the transmitting beam can be an uplink transmitting beam or a downlink transmitting beam.

[0200] The configuration information can indicate one or more ILM-RS resources or a set of one or more ILM-RS resources. As described in section 501 above, the configuration information includes power control parameters, which can be used to determine the transmission power of the ILM-RS. When the power control parameters do not include a power value, the relay device can determine the transmission power of the ILM-RS using the transmission beam based on the parameters included in the configuration information. When the power control parameters include a power value, the relay device can use the power value included in the power control parameters as the transmission power of the ILM-RS using the transmission beam. The power control parameters and the method of determining the transmission power of the ILM-RS based on the power control parameters can be referred to section 501 above, and will not be repeated here in this embodiment.

[0201] It should be noted that when the relay device receives only one configuration information, and that one configuration information corresponds to multiple ILM-RSs (i.e., there are multiple ILM-RSs), the transmission power of these multiple ILM-RSs can be the same. When the relay device receives multiple configuration information, the relay device can determine the transmission power of one or more ILM-RSs corresponding to each configuration information based on each configuration information in the multiple configuration information.

[0202] 504. The relay equipment determines the receiving power of the reference signal received by the receiving beam of the relay equipment.

[0203] The receive beam and the transmit beam are located in physically independent antennas. The transmit beam and the receive beam can be located in the same or different antenna elements.

[0204] The relay device can use a transmit beam to transmit the ILM-RS at a determined transmit power, then use a receive beam to receive the ILM-RS, and finally determine the receive power of the receive beam for receiving the ILM-RS. Optionally, as described in the foregoing embodiments, the configuration information is used to indicate the resources of the corresponding ILM-RS, and the transmit beam can be used on the resources of the ILM-RS indicated by the configuration information to transmit the ILM-RS at the transmit power of the ILM-RS.

[0205] The relay device can use the transmit beam to send part or all of the configuration information corresponding to the ILM-RS to the receive beam. The following is an example of the relay device using the transmit beam to send all of the configuration information corresponding to the ILM-RS to the receive beam.

[0206] The relay equipment includes a receiving antenna, and the receiving beam is the beam on the receiving antenna. The transmitting antenna can be an uplink transmitting antenna or a downlink transmitting antenna, and correspondingly, the transmitting beam is either an uplink transmitting beam or a downlink transmitting beam. When the transmitting antenna is an uplink transmitting antenna, i.e., the transmitting beam is an uplink transmitting beam, the receiving antenna is an uplink receiving antenna, i.e., the receiving beam is an uplink receiving beam. When the transmitting antenna is a downlink transmitting antenna, i.e., the transmitting beam is a downlink transmitting beam, the receiving antenna is a downlink receiving antenna, i.e., the receiving beam is a downlink receiving beam.

[0207] It should be noted that the configuration information may also include the time (e.g., time slot or OFDM symbol) of the corresponding ILM-RS. If the time of the corresponding ILM-RS in the configuration information is the uplink time, in one case, the transmit beam is the uplink transmit beam, and correspondingly, the receive beam is the uplink receive beam. This ensures that the transmission direction of the ILM-RS is consistent with the transmission direction of the uplink signal to be forwarded, thereby effectively avoiding interference between the transmission of the ILM-RS and the transmission of the uplink signal to be forwarded.

[0208] In another scenario, the transmit beam is a downlink transmit beam, and correspondingly, the receive beam is a downlink receive beam. This effectively avoids interference from signals transmitted from terminal devices to network devices during ILM-RS transmission, thereby improving the accuracy of the isolation level subsequently determined based on ILM-RS.

[0209] If the ILM-RS in the configuration information is in downlink time, in one scenario, the transmit beam is the downlink transmit beam, and correspondingly, the receive beam is the downlink receive beam. This ensures that the transmission direction of the ILM-RS is consistent with the transmission direction of the downlink signal to be forwarded, thereby effectively avoiding interference between the transmission of the ILM-RS and the transmission of the downlink signal to be forwarded.

[0210] In another scenario, the transmit beam is the uplink transmit beam, and correspondingly, the receive beam is the uplink receive beam. This effectively avoids interference from signals transmitted from network devices to terminal devices during ILM-RS transmission, thereby improving the accuracy of the isolation level subsequently determined based on ILM-RS.

[0211] There are several ways for relay equipment to determine the receiving power of the ILM-RS corresponding to the receiving beam configuration information. The following describes the various ways to determine the receiving power of the ILM-RS.

[0212] The number of configuration information items is one or more. The relay device can use a transmit beam to transmit one or more ILM-RS corresponding to each configuration information item according to the transmit power determined for each configuration information item, and use a receive beam to receive one or more ILM-RS corresponding to each configuration information item, and then determine the receive power of the one or more ILM-RS corresponding to each configuration information item. The number of ILM-RS receiving powers is the same as the total number of ILM-RS.

[0213] For any given configuration information, in one example, this configuration information corresponds to one ILM-RS. The relay device can use a transmit beam to transmit the ILM-RS corresponding to this configuration information at a transmit power determined according to the configuration information, and use a receive beam to receive the ILM-RS corresponding to this configuration information. Then, the receive power of the ILM-RS corresponding to this configuration information is determined; the number of ILM-RS with receive power corresponding to this configuration information is one.

[0214] In another example, any given configuration information corresponds to multiple ILM-RSs, meaning there are multiple ILM-RSs with the same transmit power. The relay device can use a transmit beam to repeatedly transmit the ILM-RS corresponding to the configuration information multiple times at the transmit power determined by the configuration information, and use a receive beam to repeatedly receive the ILM-RS corresponding to the configuration information. Then, the multiple receive powers of the ILM-RS corresponding to the configuration information are determined. The number of times the ILM-RS is repeatedly transmitted is the same as the number of ILM-RSs, and the number of ILM-RS receive powers is the same as the number of ILM-RSs. This allows the network device to determine a lower transmit power based on the configuration information, enabling the relay device to transmit the ILM-RS corresponding to the configuration information at a lower transmit power. This reduces interference to the communication system during the transmission of the ILM-RS corresponding to the configuration information, and repeatedly transmitting the ILM-RS corresponding to the configuration information improves the accuracy of subsequent isolation determination based on the ILM-RS.

[0215] In this example, the relay device can use a transmit beam to send the ILM-RS corresponding to the configuration information multiple times with a fixed number of repetitions. This number of repetitions can be preset by the relay device or determined based on the configuration information. For example, the number of repetitions can be determined based on the repetition factor defined in the resource pattern information included in the configuration information. For instance, this repetition factor can be used to indicate the number of ILM-RS corresponding to the configuration information (e.g., the number of repeated transmissions). Further, the relay device can use a transmit beam to send the ILM-RS corresponding to the configuration information multiple times with a preset time interval and a fixed number of repetitions. This preset time interval can be preset by the relay device or determined based on the configuration information. This application embodiment does not limit the method of repeatedly sending the ILM-RS corresponding to the configuration information.

[0216] Alternatively, after initially transmitting the ILM-RS corresponding to the configuration information using the transmit beam, the relay device may repeatedly execute the first receive power determination process when the first repeated power determination condition is met, until the first termination condition is reached. The first receive power determination process includes: the relay device transmitting the ILM-RS corresponding to the configuration information using the transmit beam at the transmit power determined according to the configuration information; the relay device receiving the ILM-RS corresponding to the configuration information using the receive beam; and the relay device determining the receive power of the ILM-RS corresponding to the configuration information received by the receive beam. The first repeated power determination condition may include at least one of the following: the receive power of the ILM-RS corresponding to the configuration information is not obtained; the received power of the obtained ILM-RS is less than a receive power threshold; and the receive beam does not receive the ILM-RS corresponding to the configuration information. The first termination condition may include: the isolation determined based on the transmit power and receive power is less than an isolation threshold and / or the number of repeated executions is greater than a number threshold. The transmit power in the first termination condition refers to the transmit power determined according to the configuration information, and the receive power refers to the receive power obtained according to the aforementioned first receive power determination process.

[0217] In another example, any given configuration information corresponds to multiple ILM-RSs, meaning there are multiple ILM-RSs with different transmit powers. The relay device can use a transmit beam to transmit the ILM-RS corresponding to the configuration information once at a transmit power determined by the configuration information, and use a receive beam to receive the ILM-RS corresponding to the configuration information. Then, it increases the transmit power of the ILM-RS corresponding to the configuration information and uses a transmit beam to transmit the ILM-RS corresponding to the configuration information one or more times at the increased transmit power. The total number of ILM-RS transmissions is the same as the number of ILM-RSs, and the number of received powers is the same as the total number of ILM-RS transmissions corresponding to the configuration information. The increased transmit power can be determined based on the historical transmit power of the ILM-RS corresponding to the configuration information. For example, the historical transmit power is the most recent transmit power of the ILM-RS corresponding to the configuration information. For instance, the increased transmit power can be the sum of the historical transmit power and the power boost step size. The power boost step size can be preset by the relay device or determined based on the configuration information. For example, it can be determined based on the PowerRampingStepILM parameter included in the configuration information. This allows network devices to determine a lower transmit power value based on the configuration information when setting the configuration information, and then gradually increase the transmit power of the ILM-RS. This enables relay devices to initially transmit the ILM-RS corresponding to the configuration information at a lower transmit power, thereby reducing interference to the communication system during the transmission of the ILM-RS.

[0218] Optionally, the relay device can use a transmit beam to send the ILM-RS corresponding to the configuration information multiple times at a fixed repetition number. Further, the relay device can use a transmit beam to send (i.e., periodically send) the ILM-RS corresponding to the configuration information multiple times at a preset time interval and a fixed repetition number. The repetition number and preset time interval can be implemented as described above, and will not be elaborated further in this embodiment.

[0219] Alternatively, after initially transmitting the ILM-RS corresponding to the configuration information using the transmit beam, the relay device, upon satisfying the second repeated power determination condition, increases the transmit power of the ILM-RS and repeats the second receive power determination process until the second termination condition is met. The second receive power determination process includes: the relay device transmitting the ILM-RS corresponding to the configuration information using the transmit beam at the increased transmit power; the relay device receiving the ILM-RS corresponding to the configuration information using the receive beam; and the relay device determining the receive power of the ILM-RS corresponding to the configuration information received by the receive beam. The second repeated power determination condition may include at least one of the following: the receive power of the ILM-RS corresponding to the configuration information is not obtained; the received power of the obtained ILM-RS is less than a receive power threshold; and the receive beam does not receive the ILM-RS corresponding to the configuration information. The second termination condition may include at least one of the following: the isolation determined based on the transmit power and receive power is less than an isolation threshold; the increased transmit power is greater than a transmit power threshold; and the number of repetitions is greater than a number threshold. It should be noted that the transmit power in the second termination condition refers to the increased transmit power, and the receive power refers to the receive power obtained according to the aforementioned receive power determination process.

[0220] As described above, for the ILM-RS transmitted between the transmit beam and the receive beam, each ILM-RS corresponds to a transmit power and a receive power.

[0221] The relay device can receive configuration information from the network device based on a triggering mechanism and send the ILM-RS corresponding to the configuration information (e.g., initially sending the ILM-RS corresponding to the configuration information based on a triggering mechanism). The second triggering condition for the relay device to send the ILM-RS corresponding to the configuration information can refer to the first triggering condition, which will not be elaborated here in this embodiment. Alternatively, the relay device can send the ILM-RS corresponding to the configuration information when it receives a measurement indication signal sent by the network device. This measurement indication signal can be sent by the network device when a third triggering condition is met, which can refer to the first triggering condition, and will not be elaborated here in this embodiment. Alternatively, after determining the transmission power of the ILM-RS corresponding to the configuration information based on the received configuration information, the relay device can use the transmission beam to send the ILM-RS corresponding to the configuration information according to the transmission power of the ILM-RS. This embodiment does not limit the method of triggering the relay device to send the ILM-RS corresponding to the configuration information.

[0222] After receiving the ILM-RS corresponding to the configuration information using the receiving beam on the receiving antenna, the relay equipment can determine the received power of the receiving beam receiving the ILM-RS by measuring at least one of the following parameters: RSRP, RSRQ, and RSSI. Optionally, the received power of the receiving beam receiving the ILM-RS can be at least one of the following: RSRP, RSRQ, and RSSI.

[0223] After each ILM-RS is transmitted and received, the relay device can determine the signal identifier of that ILM-RS and associate it with the transmit beam that transmitted the ILM-RS and / or the receive beam that received the ILM-RS, so as to facilitate subsequent management of the transmit and receive beams. The signal identifier of the ILM-RS may include the ILM-RS identification document (ID) or index number. Optionally, the identifiers of ILM-RSs corresponding to the same configuration information can be the same. For example, different signal identifiers may correspond to different transmit beam-receive beam pairs; or different signal identifiers may correspond to different transmit beams, such as different uplink transmit beams or downlink transmit beams; or different signal identifiers may correspond to different receive beams, such as different uplink receive beams or downlink receive beams.

[0224] It should be noted that the aforementioned embodiments are illustrated by using a transmitting beam to send part or all of the configuration information corresponding to the receiving beams. For a relay device including multiple receiving beams, the transmitting beam can send part or all of the configuration information corresponding to the ILM-RS to each receiving beam. Taking the aforementioned relay device including S1 transmitting beams and S2 receiving beams, with the number of configuration information corresponding to ILM-RS being T, as an example: When S2 = K1 * T, the transmitting beam can send the ILM-RS corresponding to the same configuration information to K1 receiving beams. When T = K2 * S2, the transmitting beam can send the ILM-RS corresponding to K2 configuration information to any one of the receiving beams.

[0225] Assuming a relay device uses a transmit beam to send the ILM-RS corresponding to a configuration information to multiple receive beams at a transmit power determined by the configuration information, the relay device can use the transmit beam to send the ILM-RS corresponding to the configuration information to each of the multiple receive beams at the transmit power determined by the configuration information, and use the multiple receive beams to receive the ILM-RS corresponding to the configuration information. Then, the multiple receive powers of the ILM-RS corresponding to the configuration information are determined.

[0226] For example, a relay device can use a transmit beam to transmit one ILM-RS corresponding to one configuration information within one OFDM symbol, that is, to transmit one ILM-RS in the frequency domain using a comb structure. Then, the relay device uses multiple receive beams to receive OFDM symbols within that OFDM symbol, determining multiple receive powers for the ILM-RS. The number of receive powers is the same as the number of comb configurations for the ILM-RS. For example, the comb configuration of the ILM-RS can be 2, 4, or other values. When the comb configuration of the ILM-RS is 2, the relay device can use two receive beams to receive the first half and the second half of the OFDM symbol, respectively. In this method, the time-domain characteristics of ILM-RS are repetitive. For example, when the comb configuration is 2, the first half of an OFDM symbol and the second half of an OFDM symbol are the same. In this way, the received power of multiple receiving beams can be obtained under the premise of transmitting a small number of ILM-RS, thereby improving the measurement efficiency of the isolation between subsequent transmitting beams and multiple receiving beams.

[0227] Optionally, for multiple transmit beams and multiple receive beams of a relay device, when multiple transmit beams transmit the ILM-RS corresponding to the same configuration information, each transmit beam can transmit the ILM-RS corresponding to that configuration information in chronological order. Correspondingly, each receive beam receives the ILM-RS corresponding to that configuration information in chronological order. This chronological order can be determined by the relay device or preset. The method of determining the chronological order is not limited in the embodiments of this application.

[0228] For example, suppose multiple transmit beams transmit a total of 4 ILM-RS corresponding to a single configuration information. Please refer to Tables 1 and 2, which show two different time sequences. Both Tables 1 and 2 illustrate the example where transmit beams tx01 and tx02 transmit the ILM-RS corresponding to the same configuration information, and receive beams rx01 and rx02 receive the ILM-RS corresponding to the same configuration information.

[0229] Table 1

[0230] ILM-RS repetition count 0 1 2 3 transmit beam tx01 tx01 tx02 tx02 Receive beam rx01 rx02 rx02 rx01

[0231] As shown in Table 1, transmit beam tx01 is used to transmit the first two ILM-RS corresponding to a given configuration information, and transmit beam tx02 is used to transmit the last two ILM-RS corresponding to the same configuration information. Receive beam rx01 is used to receive the first and last ILM-RS corresponding to the same configuration information, and receive beam rx02 is used to receive the second and third ILM-RS corresponding to the same configuration information. This timing sequence reduces beam switching, thereby improving the efficiency and performance of subsequent isolation measurements.

[0232] Table 2

[0233] ILM-RS repetition count 0 1 2 3 transmit beam tx01 tx01 tx02 tx02 Receive beam rx01 rx02 rx01 rx02

[0234] As shown in Table 2, the transmit beam tx01 is used to transmit the first two ILM-RS corresponding to a given configuration information, and the transmit beam tx02 is used to transmit the last two ILM-RS corresponding to the same configuration information. The receive beam rx01 is used to receive the first and third ILM-RS corresponding to the same configuration information, and the receive beam rx02 is used to receive the second and last ILM-RS corresponding to the same configuration information. This time sequence ensures a strong regularity in the beam correspondence and facilitates beam management by subsequent relay equipment.

[0235] It should be noted that Tables 1 and 2 above are merely illustrative examples and do not impose any restrictions on the chronological order.

[0236] 505. The relay equipment determines the isolation between the transmitting and receiving beams based on the transmitting and receiving power of the reference signal.

[0237] The relay device can determine the isolation between the transmit and receive beams using the difference between the transmit and receive power of the ILM-RS. For example, the difference between the transmit and receive power of the ILM-RS can be used to determine the isolation; or the isolation can be obtained by weighting the difference between the transmit and receive power of the ILM-RS. The weights can be any value, such as 0.5, 2, or 3, etc., and this application embodiment does not limit the weights.

[0238] For example, assuming that the transmit power of a certain ILM-RS is P(i) and the receive power is RSRP, the isolation between the transmit beam and the receive beam can be: RSRP-P(i)+10*log10(NRE), where NRE represents the bandwidth of the certain ILM-RS, and its unit is the number of resource elements.

[0239] When there are multiple ILM-RS transmitted between the transmit and receive beams, for each ILM-RS, the relay device determines the difference between the transmit power and the receive power of each ILM-RS to obtain multiple difference values. It can be understood that the number of difference values ​​is the same as the number of ILM-RS transmitted between the transmit and receive beams. The isolation can then be determined based on these multiple difference values. Optionally, the isolation can be obtained by performing difference operations on the multiple difference values. These difference operations include calculating the average, median, and variance, etc. This application embodiment does not limit the method of determining the isolation based on multiple difference values.

[0240] The isolation between the transmit and receive beams includes uplink isolation and downlink isolation. When the transmit beam is an uplink transmit beam and the receive beam is an uplink receive beam, the determined isolation is the uplink isolation. When the transmit beam is a downlink transmit beam and the receive beam is a downlink receive beam, the determined isolation is the downlink isolation.

[0241] When the uplink and downlink communication of a relay device are reciprocal (i.e., the path loss when the signal is transmitted from the uplink transmit beam to the uplink receive beam is the same as the path loss when the signal is transmitted from the downlink transmit beam to the downlink receive beam), the relay device only needs to determine the uplink isolation or downlink isolation. When the uplink and downlink communication of a relay device are not reciprocal, the relay device needs to determine both uplink and downlink isolation. The process for determining uplink and downlink isolation can be referred to in sections 501 to 505 above, and will not be elaborated upon in the embodiments of this application.

[0242] For any transmit beam and any receive beam of the relay device, the isolation degree between the transmit beam and any receive beam can be determined according to the method described in the foregoing embodiments, thereby determining the isolation degree between each transmit beam and each receive beam. Further, the relay device can determine and store the correspondence between the isolation degrees between each transmit beam and each receive beam. For example, please refer to Table 3, which shows the isolation degree between each transmit beam and each receive beam. As shown in Table 3, the backhaul beam (BH beam) can be a beam used for signal transmission between the relay device and network devices. The access beam (AC beam) can be a beam used for signal transmission between the relay device and terminal devices, or a beam used for signal transmission between the relay device and other relay devices. Other relay devices can be the next-level relay device of the relay device or relay devices operating simultaneously with the relay device. This application embodiment does not limit the other relay devices. The isolation between the transmit beam BH beam 0 and the receive beam AC beam 0 is I0, and the isolation between the transmit beam BH beam 0 and the receive beam AC beam 1 is I1.

[0243] Table 3

[0244] Transmit beam identifier Receive beam identifier Isolation BH beam 0 AC beam 0 I0 BH beam 0 AC beam 1 I1 … … …

[0245] It should be noted that Table 3 is for illustrative purposes only and does not limit the isolation between each transmit beam and each receive beam.

[0246] In the embodiments of this application, the relay device has multiple operating modes. Under different operating modes, the isolation between any transmitting beam and any receiving beam of the relay device may differ. These different operating modes may include: amplification-forwarding mode, noise reduction-forwarding mode, and frequency shift amplification-forwarding, etc. The relay capability and anti-self-oscillation capability of the relay device differ under different operating modes, therefore the isolation between any transmitting beam and any receiving beam also differs. For example, when the relay device is in noise reduction-forwarding mode, interference and noise in the signal to be forwarded transmitted between any transmitting beam and any receiving beam are filtered out, resulting in a higher isolation between them, making the relay device less prone to self-oscillation. As another example, when the relay device is in frequency shift amplification-forwarding mode, the frequency at which the receiving beam receives the signal to be forwarded is different from the frequency at which the transmitting beam transmits the signal to be forwarded, resulting in a higher isolation between them, also making the relay device less prone to self-oscillation.

[0247] For any transmitting beam and any receiving beam, in one implementation, the isolation between the any transmitting beam and the any receiving beam can be determined according to the method described in the foregoing embodiments in the current working mode of the relay device, and the isolation between the any transmitting beam and the any receiving beam in the current working mode is used as the isolation between the any transmitting beam and the any receiving beam in each working mode, that is, the isolation between the any transmitting beam and the any receiving beam in each working mode is the same.

[0248] In another implementation, the isolation between the any transmitting beam and the any receiving beam in each working mode can be determined. The determination process of the isolation between the any transmitting beam and the any receiving beam in each working mode can refer to the foregoing description, and the embodiments of the present application will not be elaborated herein.

[0249] Exemplarily, please refer to Table 4. Table 4 shows the isolation between each transmitting beam and each receiving beam in different working modes (including the first working mode, the second working mode, and the third working mode). As shown in Table 4, the isolation between the transmitting beam BHbeam 0 and the receiving beam AC beam 0 in the first working mode is I01, the isolation in the second working mode is I02, and the isolation in the third working mode is I03. The isolation between the transmitting beam BH beam 0 and the receiving beam AC beam 1 in the first working mode is I11, the isolation in the second working mode is I12, and the isolation in the third working mode is I13. Assuming that the first working mode is the amplify-and-forward mode, the second working mode is the noise-reducing-and-forward mode, and the third working mode is the frequency-shift-and-amplify-and-forward mode, Hp, Ip, and Jp can satisfy the following relationship: Ip < Jp < Kp, where p > 0.

[0250] Table 4

[0251]

[0252] It should be noted that Table 4 is only for exemplary illustration and does not limit the working mode of the relay device and the isolation between each transmitting beam and each receiving beam in each working mode.

[0253] 506. The relay device determines a first power amplification factor for signal transmission between the transmitting beam and the receiving beam according to the isolation between the transmitting beam and the receiving beam, and the first power amplification factor is less than the isolation.

[0254] The repeater can directly determine the first power amplification factor based on the isolation level, where the first power amplification factor is less than the isolation level. Alternatively, the repeater can determine the maximum permissible first power amplification factor based on the isolation level. The maximum permissible first power amplification factor is the maximum power amplification factor allowed by the repeater in the current environment, which is typically less than or equal to the maximum power amplification factor included in the aforementioned repeater capability and less than the isolation level. Then, the first power amplification factor is determined based on the maximum permissible first power amplification factor, where the first power amplification factor is less than or equal to the maximum permissible first power amplification factor, meaning the first power amplification factor is less than the isolation level.

[0255] The relay device can directly determine the maximum permissible first power amplification factor between the transmit and receive beams based on the isolation level, and then determine the first power amplification factor; alternatively, the relay device can send the isolation level to the network device, and the network device can configure the maximum permissible first power amplification factor between the transmit and receive beams based on the received isolation level, and then send the maximum permissible first power amplification factor back to the relay device. The relay device then determines the first power amplification factor based on the received maximum permissible first power amplification factor; or the relay device can determine the maximum permissible first power amplification factor between the transmit and receive beams based on the isolation level, and then send the maximum permissible first power amplification factor to the network device. The network device then determines and sends the first power amplification factor to the relay device based on the maximum permissible first power amplification factor. The process of the relay device directly determining the first power amplification factor based on the isolation level can be referred to in this description, and will not be elaborated upon here in the embodiments of this application.

[0256] The maximum permissible first power amplification factor is less than the isolation factor, and the first power amplification factor is less than or equal to the maximum permissible first power amplification factor. Optionally, the difference between the isolation factor and the maximum permissible first power amplification factor or the first power amplification factor can be greater than or equal to a first difference threshold. The first difference threshold is any value greater than 0, such as 10 dB, 15 dB, or 20 dB, etc., and this application embodiment does not limit this.

[0257] The relay device can determine the power amplification factor corresponding to the isolation between the transmit and receive beams as a first power amplification factor / maximum allowable first power amplification factor, based on the mapping relationship between isolation and power amplification factor. This mapping relationship can be pre-stored in the relay device, which can then retrieve the stored mapping relationship. Alternatively, the network device can determine and send the mapping relationship to the relay device, which then receives the mapping relationship sent by the network device. For example, the network device can send indication information to the relay device, which indicates the mapping relationship; the relay device retrieves the mapping relationship based on the received indication information. This application embodiment does not limit the method of obtaining the mapping relationship.

[0258] Optionally, the mapping relationship may include a correspondence between multiple isolation intervals and multiple power amplification factors. The relay device can determine the target isolation interval to which the isolation between the transmit beam and the receive beam belongs among the multiple isolation intervals, and then determine the power amplification factor corresponding to the target isolation interval as a first power amplification factor / maximum allowable first power amplification factor.

[0259] In a plurality of isolation intervals, the left endpoint value (i.e., the minimum value within the interval) of the first isolation interval is greater than the left endpoint value of the second isolation interval, and the right endpoint value (i.e., the maximum value within the interval) of the first isolation interval is greater than the right endpoint value of the second isolation interval. Therefore, the power amplification factor corresponding to the first isolation interval is greater than the power amplification factor corresponding to the second isolation interval. Here, the first and second isolation intervals can be any two isolation intervals from the plurality of isolation intervals. That is, the power amplification factor corresponding to an isolation interval is directly proportional to the magnitude of the left endpoint value and / or the right endpoint value of the isolation interval. The larger the left endpoint value and / or the right endpoint value of the isolation interval, the larger the power amplification factor corresponding to the isolation interval.

[0260] Each of the multiple power amplification factors is less than or equal to the left endpoint of the corresponding isolation interval. For example, the difference between the left endpoint of each isolation interval and the corresponding power amplification factor can be greater than or equal to a second difference threshold. The second difference threshold is any value greater than 0, such as 10dB, 15dB, or 20dB, etc., and this application embodiment does not limit this. The method for determining the maximum permissible first power amplification factor / first power amplification factor is merely illustrative; this application embodiment does not limit the method for determining the maximum permissible first power amplification factor / first power amplification factor, as long as the maximum permissible first power amplification factor / first power amplification factor is less than the isolation.

[0261] Please refer to Tables 5 and 6 below. Tables 5 and 6 respectively show two mapping relationships, each including the correspondence between multiple isolation intervals and multiple power amplification factors. Both Tables 5 and 6 use a second difference of 15 as an example for illustration.

[0262] As shown in Table 5, the power amplification factor corresponding to [80, 85) is 63, and the power amplification factor corresponding to [85, 90) is 66, etc. The left endpoint value of [85, 90) is greater than the left endpoint value of [80, 85), the right endpoint value of [85, 90) is greater than the right endpoint value of [80, 85), and the power amplification factor corresponding to [85, 90) (i.e., 66) is greater than the power amplification factor corresponding to [80, 85) (i.e., 63).

[0263] Table 5

[0264] Isolation range (dB) Power amplification factor (dB) [80，85) 63 [85，90) 66 [90，95) 71 [95，100) 78 … …

[0265] As shown in Table 6, the power amplification factor corresponding to (80, 85) is 63, and the power amplification factor corresponding to (85, 90) is 66, etc. The left endpoint value of (85, 90) is greater than the left endpoint value of (80, 85), the right endpoint value of (85, 90) is greater than the right endpoint value of (80, 85), and the power amplification factor corresponding to (85, 90) (i.e., 66) is greater than the power amplification factor corresponding to (80, 85) (i.e., 63).

[0266] Table 6

[0267] Isolation range (dB) Power amplification factor (dB) (80，85] 63 (85，90] 66 (90，95] 71 (95，100] 78 … …

[0268] It should be noted that Tables 5 and 6 are merely illustrative examples and do not limit the correspondence between isolation ranges and power amplification factors.

[0269] For different operating modes of the relay equipment, the first power amplification factor of the transmit and receive beams in each operating mode can be determined based on the isolation between the transmit and receive beams in each operating mode. For example, as shown in Table 4 above, assuming the first operating mode is amplification-forwarding mode, the second operating mode is noise-reduction-forwarding mode, and the third operating mode is frequency-shift amplification-forwarding mode, the maximum allowable first power amplification factor and / or the first power amplification factor of the transmit and receive beams in the first, second, and third operating modes can decrease sequentially.

[0270] 507. The relay equipment forwards the signal to be relayed received by the receiving beam to the transmitting beam based on the first power amplification factor.

[0271] The fact that the initial power amplification factor is less than the isolation factor effectively prevents the initial power amplification factor from becoming too large. This ensures that the signal power does not gradually increase as it travels from the receiving beam to the transmitting beam, and that the signal transmitted by the relay equipment is not distorted, thereby improving the communication performance of the communication system.

[0272] After determining the isolation level, the relay device can send the determined isolation level and / or isolation level identifier to the network device. The network device can configure the signal transmission parameters based on the received isolation level and / or isolation level identifier, and send the signal transmission parameters to the relay device. The relay device forwards the signal to be forwarded received by the receiving beam to the transmitting beam based on the signal transmission parameters.

[0273] The isolation identifier may include at least one of the following: the identifiers of the transmit and receive beams corresponding to the isolation, the identifier of the ILM-RS corresponding to the isolation, the transmission time of the ILM-RS corresponding to the isolation, the identifier of the signal associated with the ILM-RS corresponding to the isolation, the transmission frequency of the ILM-RS corresponding to the isolation, and the identifier of the transmit beam, etc.

[0274] The signal transmission parameters may include at least one of the following: the time for the transmit beam to transmit the signal to be forwarded corresponding to the isolation level, the time for the receive beam to receive the signal to be forwarded corresponding to the isolation level, and the frequency resources of the transmit and receive beams corresponding to the isolation level. The time for transmitting or receiving the signal to be forwarded may include at least one of the following: Orthogonal Frequency Division Multiplexing (OFDM) symbols, time slots, subframes, and frames. Optionally, the network device may also send these signal transmission parameters to the terminal device.

[0275] After the relay device sends the isolation between the transmit beam and the receive beam to the network device, if it is necessary to re-determine the isolation between the transmit beam and the receive beam and re-determine the first power amplification factor based on the isolation, the network device can re-determine the ILM-RS configuration information based on at least one of the following parameters: the relay device's relay capability, the relay device's own device type information, and the isolation between the transmit beam and the receive beam sent by the relay device.

[0276] After initially determining the isolation between the transmit and receive beams and determining a first power amplification factor based on the isolation, the relay device can re-determine the isolation between the transmit and receive beams and re-determine the first power amplification factor based on the re-determined isolation. At this time, it can send at least one of the following to the network device: relay capability, its own device type, and the already determined isolation between the transmit and receive beams, for the network device to determine the configuration information of the reference signal. The process of re-determining the isolation between the transmit and receive beams and re-determining the first power amplification factor based on the isolation, as well as the process of the network device re-determining the configuration information, can be referred to in sections 501 to 507 above, and will not be elaborated upon here in the embodiments of this application.

[0277] It should be noted that after determining the first power amplification factor, the relay device may receive a third power amplification factor from other devices (such as network devices or terminal devices). When the third power amplification factor is less than or equal to the isolation between the transmitting and receiving beams or the maximum permissible first power amplification factor, the relay device can forward the signal to be forwarded received by the receiving beam to the transmitting beam based on the third power amplification factor. When the third power amplification factor is greater than the isolation or the maximum permissible first power amplification factor, the relay device can directly forward the signal to be forwarded received by the receiving beam to the transmitting beam based on the first power amplification factor or the maximum permissible first power amplification factor. This effectively avoids self-oscillation caused by excessive power amplification factor in signal transmission between the transmitting and receiving beams, thereby improving communication performance.

[0278] The foregoing embodiments are illustrated by taking the determination of the isolation between a transmit beam and a receive beam as an example. A relay device may include multiple transmit beams and multiple receive beams. For any transmit beam and any receive beam, the isolation between that transmit beam and any receive beam can be determined according to the process described in the foregoing embodiments. Further details regarding the embodiments in this application will not be elaborated upon here.

[0279] In the foregoing embodiments, the configuration information sent by the network device is used to instruct the relay device to send ILM-RS. During actual signal transmission, the network device can simultaneously send multiple configuration information messages to the relay device. These multiple configuration messages instruct the relay device to perform multiple operations within a time slot or an OFDM symbol. These multiple operations may include some or all of the following: sending ILM-RS, transmitting downlink signals to be forwarded (e.g., transmitting according to the power amplification factor included in the configuration information), and transmitting uplink signals to be forwarded, etc. Since the relay device cannot simultaneously perform multiple operations within the same time slot or OFDM symbol, it is necessary to sequence and execute these multiple operations.

[0280] Optionally, the priority order of various operations can be preset, and multiple operations can be performed according to the priority order. For example, sending ILM-RS can have the highest priority. At this time, when the relay device is performing the aforementioned process of determining the isolation degree based on ILM-RS, if the relay device receives a downlink signal to be forwarded or an uplink signal to be forwarded, the relay device can choose not to transmit the signal to be forwarded, but instead send ILM-RS.

[0281] Alternatively, various operations can be performed based on the current power amplification factor of the relay device. For example, if the current power amplification factor is greater than a factor threshold, the ILM-RS can be sent first, followed by the transmission of the received downlink or uplink signal to be forwarded; if the current power amplification factor is less than or equal to the factor threshold, the received downlink or uplink signal to be forwarded can be transmitted first, followed by the transmission of the ILM-RS. The factor threshold can be determined based on the relay capability or preset; this application embodiment does not limit the factor threshold.

[0282] The foregoing embodiments illustrate the example of a network device executing steps 501 and 502, and a relay device executing steps 503 to 507. However, the processes executed by the network device can also be executed by the relay device, and vice versa.

[0283] Optionally, steps 505 and / or 506 can be performed by the network device. In one example, step 505 is performed by the network device, and step 506 is performed by the relay device. In this case, the relay device can send the transmit power and receive power of the ILM-RS to the network device. The network device determines the isolation between the transmit beam and the receive beam based on the transmit power and receive power of the ILM-RS. Then, the network device sends the determined isolation between the transmit beam and the receive beam to the relay device. Based on the isolation, the relay device determines the first power amplification factor when the signal to be forwarded is transmitted between the transmit beam and the receive beam. The process by which the network device determines the isolation based on the transmit power and receive power of the ILM-RS can be referred to step 505, and will not be described in detail here.

[0284] In another example, step 505 is performed by the relay device, and step 506 is performed by the network device. In this case, the relay device can determine the isolation between the transmit and receive beams based on the transmit and receive power of the reference signal. The relay device then sends the isolation value to the network device. Based on the determined isolation value, the network device determines the first power amplification factor for the signal to be forwarded when transmitted between the transmit and receive beams, and sends the determined first power amplification factor back to the relay device. The process by which the network device determines the first power amplification factor based on the isolation value can be referred to in step 506, and will not be elaborated further in this embodiment.

[0285] In another example, steps 505 and 506 are both performed by the network device. In this case, the relay device can send the transmit and receive power of the ILM-RS to the network device. Based on the transmit and receive power of the ILM-RS, the network device determines the isolation between the transmit and receive beams. Then, based on the determined isolation, the network device determines the first power amplification factor for the signal to be forwarded when transmitted between the transmit and receive beams, and sends the determined first power amplification factor to the relay device. The process by which the network device determines the isolation based on the transmit and receive power of the ILM-RS, and the process of determining the first power amplification factor based on the isolation, can be referred to in steps 505 and 506, and will not be elaborated upon here in this embodiment.

[0286] In summary, the signal transmission method provided in this application involves a network device determining configuration information for a reference signal and sending this information to a relay device. The relay device then determines the transmission power of the reference signal transmitted by its transmitting beam based on the configuration information, and subsequently determines the reception power of the reference signal received by its receiving beam. The transmission and reception power of the reference signal are then used to determine the isolation between the transmitting and receiving beams. Based on this isolation, a first power amplification factor for signal transmission between the transmitting and receiving beams is determined. Finally, the signal to be forwarded, received by the receiving beam, is forwarded to the transmitting beam based on this first power amplification factor, which is less than the isolation between the transmitting and receiving beams. During this signal transmission process, the first power amplification factor being less than the isolation between the transmitting and receiving beams effectively prevents the actual power amplification factor between the transmitting and receiving beams from becoming excessively large. This ensures that the signal power does not gradually increase during transmission from the transmitting beam to the receiving beam, and the signal transmitted by the relay device does not experience distortion, thereby improving the communication performance of the communication system.

[0287] The order of the methods provided in the embodiments of this application can be adjusted appropriately, and the process can also be added or removed as appropriate. Any variations that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application, and the embodiments of this application do not limit this.

[0288] Corresponding to the second method for determining the isolation between the transmitting and receiving beams of the relay device, this application provides another signal transmission method, please refer to... Figure 7 , Figure 7This is a flowchart illustrating another signal transmission method provided in an embodiment of this application. This method can be applied to devices in the aforementioned communication system. For example, this method can be applied to any plurality of relay devices (e.g., controllers included in the relay devices) and network devices that have established communication connections with these relay devices in the aforementioned communication system. The following embodiments use a communication system with both uplink and downlink transmission directions as an example for illustration. For embodiments of communication systems with only one transmission direction, the following flowchart can be referred to, and will not be repeated in the embodiments of this application. The method may include the following processes:

[0289] 601. The network device determines the first configuration information of the first reference signal.

[0290] The process can be referred to in section 501 above, and will not be repeated here in the embodiments of this application.

[0291] 602. The network device sends the first configuration information to the first relay device.

[0292] The process can be referred to in section 502 above, and will not be repeated here in the embodiments of this application.

[0293] 603. The first relay device determines the transmission power of the first transmission beam of the first relay device to transmit the first reference signal based on the received first configuration information.

[0294] The process can be referred to in 503 above, and will not be repeated here in the embodiments of this application.

[0295] 604. The first relay device determines the receiving power of the first relay device's receiving beam for receiving the first reference signal.

[0296] This process can be referred to in section 504 above, and will not be repeated here in the embodiments of this application.

[0297] 605. The network device determines the second configuration information of the second reference signal.

[0298] The number of second configuration information is one or more. When the number of second configuration information is multiple, some or all of the second configuration information may be the same or different. This application embodiment does not limit this.

[0299] The process can be referred to in section 501 above, and will not be repeated here in the embodiments of this application.

[0300] 606. The network device sends the second configuration information to the second relay device.

[0301] Unlike the first relay device, the second relay device can be one or more. Optionally, the second relay device can be cascaded with the first relay device (e.g., the first relay device is...). Figure 1The relay device 102 in the middle, the second relay device is Figure 1 (Relay device 104) or non-cascaded (e.g., the first relay device is...) Figure 1 The relay device 102 in the middle, the second relay device is Figure 1 (Relay device 103 in the middle). This application embodiment does not limit the number of second relay devices or their positional relationship with the first relay device.

[0302] The process can be referred to in section 502 above, and will not be repeated here in the embodiments of this application.

[0303] 607. The second relay device determines the transmission power of the second transmission beam of the second relay device to transmit the second reference signal based on the received second configuration information.

[0304] The number of second transmission beams can be multiple, and the configuration information of the second ILM-RS transmitted by any two transmission beams among the multiple second transmission beams can be the same or different. This application embodiment does not limit this.

[0305] The process can be referred to in 503 above, and will not be repeated here in the embodiments of this application.

[0306] 608. The transmission power of the second relay device sending the second reference signal to the first relay device.

[0307] Optionally, the second relay device can send the transmission power of the second ILM-RS to the first relay device after determining the transmission power of the second ILM-RS according to the second configuration information. Alternatively, the first relay device can send a power request to the second relay device, and the second relay device can send the transmission power of the second ILM-RS to the first relay device based on the received power request. This application embodiment does not limit the method by which the first relay device determines the transmission power of the second ILM-RS.

[0308] 609. The first relay device determines the receiving power of the receiving beam of the first relay device for receiving the second reference signal.

[0309] This process can be referred to in section 504 above, and will not be repeated here in the embodiments of this application.

[0310] 610. The first relay device determines the isolation between the first transmitting beam and the receiving beam based on the transmitting power and receiving power of the first reference signal and the transmitting power and receiving power of the second reference signal.

[0311] Because during the transmission of the signal to be forwarded, the signals transmitted by the transmitting beams of other relay devices (such as the second relay device) will also be amplified and transmitted to the receiving beam of the first relay device, causing the first relay device to experience self-oscillation, measuring the transmitting power and receiving power of the second ILM-RS between the second transmitting beam and the receiving beam can effectively avoid the probability of the signal transmitted by the second transmitting beam of the second relay device causing the first relay device to experience self-oscillation.

[0312] Furthermore, a first isolation degree can be determined based on the transmit power and receive power of the first ILM-RS, and a second isolation degree can be determined based on the transmit power and receive power of the second ILM-RS. Then, the isolation degree between the first transmit beam and the receive beam can be determined based on the first isolation degree and the second isolation degree.

[0313] For example, assuming there is one second relay device, the isolation between the first transmitting beam and the receiving beam can be: 10 × log 10 (10 I0 / 10 +10 I1 / 10 ), where I0 represents the first level of isolation and I1 represents the second level of isolation.

[0314] The process can be referred to in the aforementioned 505, and will not be repeated here in the embodiments of this application.

[0315] 611. The first relay device determines the first power amplification factor for signal transmission between the first transmitting beam and the receiving beam based on the isolation between the first transmitting beam and the receiving beam, wherein the first power amplification factor is less than the isolation.

[0316] The process can be referred to in 506 above, and will not be repeated here in the embodiments of this application.

[0317] 612. The first relay device forwards the signal to be forwarded received by the receiving beam to the first transmitting beam based on the first power amplification factor.

[0318] The process can be referred to in 507 above, and will not be repeated here in the embodiments of this application.

[0319] In summary, the signal transmission method provided in this application involves a network device determining first configuration information for a first reference signal and sending the first configuration information to a first relay device. The first relay device determines the transmission power of the first transmit beam for transmitting the first reference signal based on the first configuration information, and then determines the reception power of the first relay device's receive beam for receiving the first reference signal. The network device also determines second configuration information for a second reference signal and sends the second configuration information to a second relay device. The second relay device determines the transmission power of the second transmit beam for transmitting the second reference signal based on the second configuration information, and then the first relay device determines the reception power of its receive beam for receiving the second reference signal. Using the transmission and reception power of the first and second reference signals, the isolation between the first transmit beam and the receive beam is determined. Based on this isolation, a first power amplification factor for signal transmission between the first transmit beam and the receive beam is determined. Finally, based on the first power amplification factor, the signal to be forwarded received by the receive beam is forwarded to the first transmit beam. The first power amplification factor is less than the isolation between the first transmit beam and the receive beam. During the signal transmission process, the first power amplification factor is determined based on the isolation degree. The first power amplification factor is less than the isolation degree between the first transmitting beam and the receiving beam, which can effectively avoid the situation where the actual power amplification factor between the first transmitting beam and the receiving beam is too large. This ensures that the power will not gradually increase during the transmission of the signal from the first transmitting beam to the receiving beam, and the signal transmitted by the first relay device will not be distorted, thereby improving the communication performance of the communication system.

[0320] Furthermore, since the signal transmitted by the second transmitting beam of the second relay device is also amplified and transmitted to the receiving beam of the first relay device during the transmission of the signal to be forwarded, causing the first relay device to experience self-oscillation, measuring the transmission power and reception power of the second reference signal between the second transmitting beam and the receiving beam can further reduce the probability of the signal transmitted by the second transmitting beam of the second relay device causing self-oscillation in the first relay device, thereby further improving the communication performance of the communication system.

[0321] The order of the methods provided in the embodiments of this application can be adjusted appropriately, and the process can also be added or subtracted as appropriate. Any method that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application. The embodiments of this application do not limit this.

[0322] The signal transmission method provided in the above embodiments can be applied to a communication system, which can be referred to as such. Figure 1 The communication system shown.

[0323] The communication system includes any of the aforementioned relay devices; the communication system also includes: terminal devices and / or network devices, which are used to send signals to be forwarded to the relay devices.

[0324] A relay device is used to determine the transmission power of the reference signal transmitted by the transmitting beam of the relay device; determine the reception power of the reference signal received by the receiving beam of the relay device; determine the isolation between the transmitting beam and the receiving beam based on the transmission power and reception power of the reference signal; determine a first power amplification factor for signal transmission between the transmitting beam and the receiving beam based on the isolation factor, wherein the first power amplification factor is less than the isolation factor; and forward the signal to be forwarded received by the receiving beam to the transmitting beam based on the first power amplification factor.

[0325] In one possible implementation, the relay device is specifically used to determine the power amplification factor corresponding to the isolation between the transmitting beam and the receiving beam as the first power amplification factor based on the mapping relationship between isolation and power amplification factor.

[0326] In one possible implementation, the mapping relationship includes a correspondence between multiple isolation intervals and multiple power amplification factors; the relay device is specifically used to determine the target isolation interval to which the isolation between the transmitting beam and the receiving beam belongs among the multiple isolation intervals; and the power amplification factor corresponding to the target isolation interval is determined as the first power amplification factor.

[0327] In one possible implementation, the left endpoint value of the first isolation interval is greater than the left endpoint value of the second isolation interval, the right endpoint value of the first isolation interval is greater than the right endpoint value of the second isolation interval, and the power amplification factor corresponding to the first isolation interval is greater than the power amplification factor corresponding to the second isolation interval; wherein, the first isolation interval and the second isolation interval are any two isolation intervals among the multiple isolation intervals.

[0328] In one possible implementation, each of the multiple power amplification factors is less than or equal to the left endpoint of the corresponding isolation interval.

[0329] In one possible implementation, the mapping relationship is configured by the network device and sent to the relay device, or the mapping relationship is pre-stored in the relay device.

[0330] In one possible implementation, the relay device is also used to obtain the mapping relationship between isolation and power amplification. When the mapping relationship is pre-stored in the relay device, the relay device is specifically used to obtain the stored mapping relationship. When the mapping relationship is configured by the network device and sent to the relay device, the network device is specifically used to send the mapping relationship to the relay device; the relay device is specifically used to receive the mapping relationship. For example, the network device is specifically used to determine the mapping relationship and send indication information to the relay device, the indication information indicating the mapping relationship; the relay device is specifically used to obtain the mapping relationship based on the received indication information.

[0331] In one possible implementation, a network device is used to determine configuration information of a reference signal and send the configuration information, including power control parameters, to a relay device; the relay device is used to determine the transmission power of the reference signal based on the power control parameters in the received configuration information.

[0332] In one possible implementation, the power control parameters include at least one of the following: power value, initial transmission power of the reference signal, maximum transmission power of the reference signal, transmission power ramp-up step of the reference signal, second power amplification factor when the target signal is transmitted between the transmission beam and the receiving beam, the receiving power of the receiving beam receiving the target signal, and the quality of the receiving beam receiving the target signal; wherein, the target signal is a signal sent to the relay equipment by other devices connected to the relay equipment.

[0333] In one possible implementation, the number of reference signals is one or more, the number of configuration information is one or more, and one configuration information corresponds to one or more reference signals.

[0334] In one possible implementation, the relay device is further configured to send its relay capabilities to the network device; the network device is specifically configured to determine configuration information based on the relay capabilities; wherein the relay capabilities include at least one of the following: the relay device's maximum isolation, maximum amplification factor, maximum transmit power, power margin, amplification margin, measurement capability, and number of beams.

[0335] In one possible implementation, the relay device is further configured to determine a pre-configured power amplification factor between the transmit beam and the receive beam; when the pre-configured power amplification factor between the transmit beam and the receive beam is not within a first range, it sends a configuration request to the network device; the network device is specifically configured to determine configuration information based on the received configuration request.

[0336] In one possible implementation, the relay device is also used to send the isolation between the transmit beam and the receive beam to the network device; the network device is specifically used to re-determine the configuration information based on the received isolation between the transmit beam and the receive beam.

[0337] In one possible implementation, the relay device is specifically used to transmit a reference signal using a transmit beam at the transmit power of the reference signal; to receive the reference signal using a receive beam; and to determine the receive power of the receive beam for receiving the reference signal.

[0338] In one possible implementation, the relay device is specifically configured to increase the transmission power of the reference signal and repeatedly execute the receive power determination process when the repeated power determination condition is met, until the termination condition is reached; the repeated power determination condition includes: the received power is less than the received power threshold and / or the received beam does not receive the reference signal; the termination condition includes at least one of the following: the isolation determined based on the transmission power and the received power is less than the isolation threshold, the increased transmission power is greater than the transmission power threshold, and the number of repeated executions is greater than the number of executions threshold.

[0339] In one possible implementation, the network device is further configured to determine a pre-configured power amplification factor between the transmit beam and the receive beam; and to determine configuration information when the pre-configured power amplification factor is not within a second range.

[0340] In one possible implementation, the relay device is also used to receive a third power amplification factor sent by other devices; when the third power amplification factor is less than or equal to the isolation between the transmitting beam and the receiving beam, the signal to be forwarded received by the receiving beam is forwarded to the transmitting beam based on the third power amplification factor; when the third power amplification factor is greater than the isolation between the transmitting beam and the receiving beam, the signal to be forwarded received by the receiving beam is forwarded to the transmitting beam based on the first power amplification factor.

[0341] The communication system of this application embodiment can be used to execute the signal transmission process of the aforementioned method embodiment. Its implementation principle and technical effect are similar, and will not be repeated here.

[0342] Figure 8 This is a schematic diagram of a communication device provided in an embodiment of this application. The communication device 800 can be a relay device or a chip or functional module in a relay device; it can also be a network device or a chip or functional module in a network device. Figure 8 As shown, the communication device 800 includes a processor 801, a transceiver 802, and a communication line 803.

[0343] Furthermore, the communication device 800 may also include a memory 804. The processor 801, memory 804, and transceiver 802 can be connected via a communication line 803.

[0344] The processor 801 can be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 801 can also be other devices with processing capabilities, such as circuits, devices, or software modules, without limitation.

[0345] Transceiver 802 is used to communicate with other devices or other communication networks, such as Ethernet, radio access network (RAN), wireless local area network (WLAN), etc. Transceiver 802 can be a module, circuit, transceiver, or any device capable of enabling communication.

[0346] The transceiver 802 is mainly used for signal transmission and reception, and can include a transmitter and a receiver to send and receive signals respectively; operations other than signal transmission and reception are implemented by the processor, such as information processing and calculation.

[0347] Communication line 803 is used to transmit information between the components included in communication device 800.

[0348] In one design, the processor can be viewed as a logic circuit, and the transceiver as an interface circuit.

[0349] Furthermore, it may also include a memory 804 for storing instructions. These instructions may be computer programs.

[0350] The memory 804 can be a read-only memory (ROM) or other type of static storage device that can store static information and / or instructions; it can also be a random access memory (RAM) or other type of dynamic storage device that can store information and / or instructions; it can also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.

[0351] It should be noted that the memory 804 can exist independently of the processor 801, or it can be integrated with the processor 801. The memory 804 can be used to store instructions, program code, or some data, etc. The memory 804 can be located inside or outside the communication device 800, without limitation. The processor 801 is used to execute the instructions stored in the memory 804 to implement the method provided in the above embodiments of this application.

[0352] In one example, processor 801 may include one or more CPUs, for example Figure 8 CPU0 and CPU1 in the CPU.

[0353] As an optional implementation, the communication device 800 includes multiple processors, for example, besides Figure 8 In addition to processor 801, it may also include processor 807.

[0354] As an optional implementation, the communication device 800 also includes an output device 805 and an input device 806. For example, the input device 806 is a device such as a keyboard, mouse, microphone, or joystick, and the output device 805 is a device such as a display screen or speaker.

[0355] It should be noted that the communication device 800 can be a terminal device, network device, relay device, embedded device, chip system, or other device. Figure 8 Equipment with a similar structure. Furthermore... Figure 8 The structural composition shown does not constitute a limitation on the communication device, except... Figure 8 In addition to the components shown, the communication device may include components that are larger than those shown. Figure 8 This may indicate more or fewer components, or combinations of certain components, or different component arrangements.

[0356] In this embodiment of the application, the chip system may be composed of chips or may include chips and other discrete devices.

[0357] Furthermore, the actions, terms, etc., involved in the various embodiments of this application can be referenced interchangeably without limitation. The message names or parameter names in the messages exchanged between the various devices in the embodiments of this application are merely examples, and other names may be used in specific implementations without limitation.

[0358] The above description primarily focuses on the signal transmission method provided in this application from the perspective of device-to-device interaction. It is understood that each device, in order to achieve the aforementioned functions, includes corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should readily recognize that, based on the algorithm steps of the examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0359] This application embodiment can divide each device into functional modules according to the above method example. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.

[0360] Figure 9 This block diagram illustrates a signal transmission device according to an embodiment of this application. When functional modules are divided according to their respective functions, the signal transmission device 900 may include a transceiver module 901 and a processing module 902. Exemplarily, the signal transmission device may be a relay device or a network device, or it may be a chip or other combined device or component having the aforementioned signal transmission device functions. When the signal transmission device is a relay device or a network device, the transceiver module 901 may be a transceiver, which may include an antenna and radio frequency circuits, etc.; the processing module 902 may be a processor (or processing circuit), such as a baseband processor, which may include one or more CPUs. When the signal transmission device is a device or component having the aforementioned functions, the transceiver module 901 may be a radio frequency unit; the processing module 902 may be a processor (or processing circuit), such as a baseband processor. When the communication device is a chip system, the transceiver module 901 may be an input / output interface of a chip (e.g., a baseband chip); the processing module 902 may be a processor (or processing circuit) of the chip system, and may include one or more central processing units. It should be understood that the transceiver module 901 in the embodiments of this application can be implemented by a transceiver or transceiver-related circuit components; the processing module 902 can be implemented by a processor or processor-related circuit components (or, referred to as processing circuit).

[0361] For example, when the signal transmission device 900 is a relay device or a chip or functional unit of a relay device, the transceiver module 901 can be used to perform... Figure 6 or Figure 7 In the illustrated embodiment, all transmit and receive operations performed by the relay device, and / or other processes used to support the technology described herein; processing module 902 can be used to perform Figure 6 or Figure 7 The embodiments shown include all operations performed by the relay device other than the transmit and receive operations, and / or other processes used to support the techniques described herein.

[0362] The transceiver module 901 may include a transmitting module and / or a receiving module, respectively used to perform... Figure 6 or Figure 7 The transmission and reception operations performed by the relay device in the illustrated embodiment, for example, the signal transmission device includes:

[0363] The processing module is used to determine the transmission power of the reference signal transmitted by the transmitting beam of the relay device;

[0364] The processing module is also used to determine the receiving power of the relay device's receiving beam for receiving the reference signal;

[0365] The processing module is further configured to determine the isolation between the transmitting beam and the receiving beam based on the transmitting power and receiving power of the reference signal;

[0366] The processing module is further configured to determine a first power amplification factor for signal transmission between the transmitting beam and the receiving beam based on the isolation between the transmitting beam and the receiving beam, wherein the first power amplification factor is less than the isolation.

[0367] The transmitting module is used to forward the signal to be forwarded received by the receiving beam to the transmitting beam based on the first power amplification factor.

[0368] In conjunction with the above scheme, the processing module is specifically used to determine the power amplification factor corresponding to the isolation between the transmitting beam and the receiving beam as the first power amplification factor based on the mapping relationship between isolation and power amplification factor.

[0369] In combination with the above scheme, the mapping relationship includes the correspondence between multiple isolation intervals and multiple power amplification factors;

[0370] The processing module is specifically used to determine the target isolation interval to which the isolation between the transmitted beam and the received beam belongs among the plurality of isolation intervals; and to determine the power amplification factor corresponding to the target isolation interval as the first power amplification factor.

[0371] In combination with the above scheme, the left endpoint value of the first isolation interval is greater than the left endpoint value of the second isolation interval, the right endpoint value of the first isolation interval is greater than the right endpoint value of the second isolation interval, and the power amplification factor corresponding to the first isolation interval is greater than the power amplification factor corresponding to the second isolation interval; wherein, the first isolation interval and the second isolation interval are any two isolation intervals among the plurality of isolation intervals.

[0372] In combination with the above scheme, each of the plurality of power amplification factors is less than or equal to the left endpoint value of the corresponding isolation interval.

[0373] In combination with the above scheme, the mapping relationship is configured by the network device and sent to the relay device, or the mapping relationship is pre-stored in the relay device.

[0374] In conjunction with the above scheme, the processing module is specifically used to receive configuration information of the reference signal sent by the network device, the configuration information including power control parameters; and to determine the transmission power of the reference signal based on the power control parameters.

[0375] In conjunction with the above scheme, the power control parameters include at least one of the following: power value, initial transmission power of the reference signal, maximum transmission power of the reference signal, transmission power ramp-up step of the reference signal, second power amplification factor of the target signal when transmitted between the transmission beam and the receiving beam, receiving power of the receiving beam receiving the target signal, and quality of the receiving beam receiving the target signal; wherein, the target signal is a signal sent to the relay device by other devices connected to the relay device.

[0376] In combination with the above scheme, the number of reference signals is one or more, the number of configuration information is one or more, and one configuration information corresponds to one or more reference signals.

[0377] In conjunction with the above scheme, the transmitting module is further configured to transmit the relay capability of the relay device to the network device, wherein the relay capability is used by the network device to determine the configuration information; wherein the relay capability includes at least one of the following: the maximum isolation, maximum amplification factor, maximum transmit power, power margin, amplification margin, measurement capability, and number of beams of the relay device.

[0378] In conjunction with the above scheme, the transmitting module is further configured to send a configuration request to the network device when the pre-configured power amplification factor between the transmitting beam and the receiving beam is not within a first range. The configuration request is used to request the network device to determine the configuration information.

[0379] In conjunction with the above scheme, the transmitting module is further configured to send the isolation degree between the transmitting beam and the receiving beam to the network device, and the isolation degree between the transmitting beam and the receiving beam is used by the network device to re-determine the configuration information.

[0380] In conjunction with the above scheme, the processing device is specifically used to transmit the reference signal using the transmitting beam at the transmitting power of the reference signal; to receive the reference signal using the receiving beam; and to determine the receiving power of the receiving beam for receiving the reference signal.

[0381] In conjunction with the above scheme, the processing device is specifically used to increase the transmission power of the reference signal when the repeated power determination condition is met, and to repeatedly execute the receive power determination process until the termination condition is reached; the repeated power determination condition includes: the receive power is less than the receive power threshold and / or the receive beam does not receive the reference signal; the termination condition includes at least one of the following: the isolation determined based on the increased transmission power and the receive power obtained based on the receive power determination process is less than the isolation threshold, the increased transmission power is greater than the transmission power threshold, and the number of repeated executions is greater than the number of executions threshold.

[0382] In conjunction with the above scheme, the signal transmission device further includes:

[0383] The receiving module is used to receive the third power amplification factor sent by other devices;

[0384] The transmitting module is further configured to forward the signal to be forwarded received by the receiving beam to the transmitting beam based on the third power amplification factor when the third power amplification factor is less than or equal to the isolation between the transmitting beam and the receiving beam; and to forward the signal to be forwarded received by the receiving beam to the transmitting beam based on the first power amplification factor when the third power amplification factor is greater than the isolation between the transmitting beam and the receiving beam.

[0385] When the signal transmission device is a network device or a chip or functional unit of a network device, the transceiver module 901 can be used to perform... Figure 6 or Figure 7 In the illustrated embodiment, all transmit and receive operations performed by the network device, and / or other processes used to support the techniques described herein; processing module 902 can be used to execute Figure 6 or Figure 7 The illustrated embodiments include all operations performed by the network device other than transmission and reception operations, and / or other processes used to support the techniques described herein. The signal transmission device may include:

[0386] The processing module is used to determine the mapping relationship between isolation and power amplification factor;

[0387] A sending module is used to send the indication information to the relay device, the indication information being used to indicate the mapping relationship; the indication information is used by the relay device to obtain the mapping relationship.

[0388] In conjunction with the above scheme, the processing module is further configured to determine the configuration information of the reference signal, the configuration information including power control parameters;

[0389] The transmitting module is further configured to transmit the configuration information to the relay device, the configuration information being used by the relay device to determine the transmission power of the reference signal.

[0390] In conjunction with the above scheme, the signal transmission device further includes:

[0391] A receiving module is used to receive the relay capability sent by the relay device;

[0392] The processing module is specifically used to determine the configuration information based on the relay capability;

[0393] The relay capability includes at least one of the following: maximum isolation, maximum amplification factor, maximum transmit power, power margin, amplification margin, measurement capability, and number of beams of the relay device.

[0394] In conjunction with the above scheme, the receiving module is also used to receive the configuration request of the relay device sent by the relay device;

[0395] The processing module is specifically used to determine the configuration information based on the received configuration request.

[0396] In conjunction with the above scheme, the receiving module is also used to receive the isolation between the transmitting beam and the receiving beam sent by the relay device;

[0397] The processing module is specifically used to redetermine the configuration information based on the isolation between the received transmit beam and the receive beam.

[0398] In conjunction with the above scheme, the processing module is specifically used to determine the pre-configured power amplification factor between the transmitting beam and the receiving beam; when the pre-configured power amplification factor is not within the second range, the configuration information is determined.

[0399] Other functions of the above-mentioned signal transmission device can be found in the description of the relay device or network device in the method embodiment, and will not be repeated here.

[0400] As another feasible approach Figure 9The transceiver module 901 in the middle can be made by Figure 8 The transceiver 802 in the original text can be replaced by a processor 807, which can integrate the functions of the transceiver module 901; the processing module 902 can be replaced by a processor 807, which can integrate the functions of the processing module 902. Furthermore, Figure 9 The signal transmission device 900 shown may further include a memory (not shown). When the transceiver module 901 is replaced by a transceiver and the processing module 902 is replaced by a processor, the signal transmission device 900 involved in the embodiments of this application can be Figure 8 The communication device 800 shown.

[0401] The processor and transceiver described in this application can be implemented on integrated circuits (ICs), analog ICs, radio frequency integrated circuits, mixed-signal ICs, application-specific integrated circuits (ASICs), printed circuit boards (PCBs), electronic devices, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductors (CMOS), n-type metal-oxide-semiconductor (NMOS), p-type metal oxide semiconductors (PMOS), bipolar junction transistors (BJTs), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.

[0402] The memory can be volatile or non-volatile, or a combination of both. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), used as an external cache. 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 synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DRRAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0403] Figure 10 This is a schematic diagram of another communication device provided in an embodiment of this application. This communication device is applicable to the scenarios shown in the above method embodiments. For ease of explanation, Figure 10 Only the main components of the communication device are shown, including a processor, memory, control circuitry, and input / output devices. The processor is primarily used to process communication protocols and data, execute software programs, and process the data within those programs. The memory is mainly used to store software programs and data. The control circuitry is primarily used for power supply and the transmission of various electrical signals. The input / output devices are primarily used to receive user input data and output data to the user.

[0404] When the communication device is a relay device or a network device, the control circuit is a motherboard, and the memory includes storage media such as hard disks, RAM, and ROM. The processor may include a baseband processor and a central processing unit (CPU). The baseband processor is mainly used to process communication protocols and communication data, while the CPU is mainly used to control the entire network device, execute software programs, and process data from those programs. Input / output devices include a display screen, keyboard, and mouse. The control circuit may further include or be connected to transceiver circuits or transceivers, such as network cable interfaces, for sending or receiving data or signals, such as for data transmission and communication with other devices. Furthermore, it may also include an antenna for transmitting and receiving wireless signals for signal transmission with other devices.

[0405] According to the method provided in the embodiments of this application, this application also provides a computer program product, which includes computer program code. When the computer program code is run on a computer, it causes the computer to execute any of the methods described in the embodiments of this application.

[0406] This application also provides a computer-readable storage medium. All or part of the processes in the above method embodiments can be executed by a computer or an information processing device, using computer programs or instructions to control related hardware. The computer program or set of instructions can be stored in the computer-readable storage medium. When executed, the computer program or set of instructions can include the processes described in the above method embodiments. The computer-readable storage medium can be an internal storage unit of the terminal device (including a data transmitter and / or a data receiver) in any of the foregoing embodiments, such as the hard disk or memory of the terminal device. The computer-readable storage medium can also be an external storage device of the terminal device, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the terminal device. Further, the computer-readable storage medium can include both internal storage units and external storage devices of the terminal device. The computer-readable storage medium is used to store the computer program or instructions and other programs and data required by the terminal device. The computer-readable storage medium can also be used to temporarily store data that has been output or will be output.

[0407] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0408] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0409] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0410] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0411] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0412] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0413] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A signal transmission method, characterized in that, The method includes: Determine the transmission power of the reference signal transmitted by the relay equipment's transmit beam; Determine the receiving power of the relay device's receiving beam for receiving the reference signal; The isolation between the transmitted beam and the received beam is determined based on the transmitted power and received power of the reference signal. Based on the isolation between the transmitting beam and the receiving beam, a first power amplification factor for signal transmission between the transmitting beam and the receiving beam is determined, wherein the first power amplification factor is less than the isolation. Based on the first power amplification factor, the signal to be forwarded received by the receiving beam is forwarded to the transmitting beam.

2. The method according to claim 1, characterized in that, Determining the first power amplification factor for signal transmission between the transmitting beam and the receiving beam based on the isolation between the transmitting beam and the receiving beam includes: Based on the mapping relationship between isolation and power amplification factor, the power amplification factor corresponding to the isolation between the transmitting beam and the receiving beam is determined as the first power amplification factor.

3. The method according to claim 2, characterized in that, The mapping relationship includes the correspondence between multiple isolation intervals and multiple power amplification factors; The step of determining the power amplification factor corresponding to the isolation between the transmit beam and the receive beam as the first power amplification factor based on the mapping relationship between isolation and power amplification factor includes: Determine the target isolation interval to which the isolation between the transmitted beam and the received beam belongs among the plurality of isolation intervals; The power amplification factor corresponding to the target isolation range is determined as the first power amplification factor.

4. The method according to claim 3, characterized in that, In the plurality of isolation intervals, the left endpoint value of the first isolation interval is greater than the left endpoint value of the second isolation interval, the right endpoint value of the first isolation interval is greater than the right endpoint value of the second isolation interval, and the power amplification factor corresponding to the first isolation interval is greater than the power amplification factor corresponding to the second isolation interval. Wherein, the first isolation interval and the second isolation interval are any two isolation intervals among the plurality of isolation intervals.

5. The method according to claim 3 or 4, characterized in that, Each of the plurality of power amplification factors is less than or equal to the left endpoint value of the corresponding isolation interval.

6. The method according to any one of claims 2 to 5, characterized in that, The mapping relationship is configured by the network device and sent to the relay device, or the mapping relationship is pre-stored in the relay device.

7. The method according to any one of claims 1 to 6, characterized in that, The determination of the transmission power of the reference signal for the transmitting beam of the relay device includes: The configuration information received from the network device includes power control parameters; The transmission power of the reference signal is determined based on the power control parameters.

8. The method according to claim 7, characterized in that, The power control parameters include at least one of the following: power value, initial transmission power of the reference signal, maximum transmission power of the reference signal, transmission power ramp step of the reference signal, second power amplification factor of the target signal when it is transmitted between the transmission beam and the receiving beam, the receiving power of the receiving beam receiving the target signal, and the quality of the receiving beam receiving the target signal. The target signal is a signal sent to the relay device by other devices connected to the relay device.

9. The method according to claim 7 or 8, characterized in that, The number of reference signals is one or more, the number of configuration information is one or more, and one configuration information corresponds to one or more reference signals.

10. The method according to any one of claims 7 to 9, characterized in that, The method further includes: The relay capability of the relay device is sent to the network device, and the relay capability is used by the network device to determine the configuration information; The relay capability includes at least one of the following: maximum isolation, maximum amplification factor, maximum transmit power, power margin, amplification margin, measurement capability, and number of beams of the relay device.

11. The method according to any one of claims 7 to 9, characterized in that, The method further includes: When the pre-configured power amplification factor between the transmit beam and the receive beam is not within a first range, a configuration request is sent to the network device, the configuration request being used to request the network device to determine the configuration information.

12. The method according to any one of claims 7 to 11, characterized in that, After determining the isolation between the transmit beam and the receive beam based on the transmit power and receive power of the reference signal, the method further includes: The isolation degree between the transmit beam and the receive beam is sent to the network device, and the isolation degree between the transmit beam and the receive beam is used by the network device to re-determine the configuration information.

13. The method according to any one of claims 1 to 12, characterized in that, Determining the received power of the relay device's receiving beam for receiving the reference signal includes: The reference signal is transmitted using the transmitted beam at the transmission power of the reference signal; The reference signal is received using the receiving beam; Determine the received power of the receiving beam for receiving the reference signal.

14. The method according to any one of claims 1 to 13, characterized in that, The method further includes: When the repeated power determination condition is met, the transmission power of the reference signal is increased, and the reception power determination process is repeated until the termination condition is met. The repeated determination of power conditions includes: the received power is less than the received power threshold and / or the received beam does not receive the reference signal; The termination condition includes at least one of the following: the isolation degree determined based on the transmission power and the reception power is less than the isolation degree threshold, the improved transmission power is greater than the transmission power threshold, and the number of repeated executions is greater than the number of times threshold.

15. The method according to any one of claims 1 to 14, characterized in that, The method further includes: Receive the third power amplification factor sent by other devices; When the third power amplification factor is less than or equal to the isolation between the transmitting beam and the receiving beam, the signal to be forwarded received by the receiving beam is forwarded to the transmitting beam based on the third power amplification factor. When the third power amplification factor is greater than the isolation between the transmitting beam and the receiving beam, the signal to be forwarded received by the receiving beam is forwarded to the transmitting beam based on the first power amplification factor.

16. A relay device, characterized in that, The relay equipment includes: The processing module is used to determine the transmission power of the transmission beam reference signal of the relay device; The processing module is also used to determine the receiving power of the relay device's receiving beam for receiving the reference signal; The processing module is further configured to determine the isolation between the transmitting beam and the receiving beam based on the transmitting power and receiving power of the reference signal; The processing module is further configured to determine a first power amplification factor for signal transmission between the transmitting beam and the receiving beam based on the isolation between the transmitting beam and the receiving beam, wherein the first power amplification factor is less than the isolation. The transmitting module is used to forward the signal to be forwarded received by the receiving beam to the transmitting beam based on the first power amplification factor.

17. A communication device, characterized in that, include: One or more processors; Memory, used to store one or more computer programs or instructions; When the one or more computer programs or instructions are executed by the one or more processors, the one or more processors perform the method as described in any one of claims 1-15.

18. A communication device, characterized in that, Includes a processor for performing the method as described in any one of claims 1-15.

19. A computer-readable storage medium, characterized in that, It includes a computer program or instructions that, when executed on a computer, cause the computer to perform the method of any one of claims 1-15.

20. A communication system, characterized in that, The communication system includes the relay device as described in claim 16; The communication system further includes: terminal equipment and / or network equipment, which are used to send signals to be forwarded to the relay equipment.

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