CN114930920A - Communication method and device - Google Patents

Communication method and device Download PDF

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Publication number
CN114930920A
CN114930920A CN202080092418.3A CN202080092418A CN114930920A CN 114930920 A CN114930920 A CN 114930920A CN 202080092418 A CN202080092418 A CN 202080092418A CN 114930920 A CN114930920 A CN 114930920A
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signal
power
relay
terminal device
network
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CN114930920B (en
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陆绍中
谢信乾
郭志恒
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application provides a communication method and equipment, relates to the technical field of wireless communication, and aims to solve the problem that uplink coverage performance of different terminal equipment in a network equipment coverage range is large in difference. The method comprises the following steps: the relay device receives a power parameter from the network device, wherein the power parameter corresponds to the first terminal device; the relay device receives a first signal from a first terminal device; the relay equipment determines first transmission power of a second signal according to the first signal and the power parameter; and the relay equipment adopts the first transmission power to send the second signal to the network equipment. Based on the scheme, the relay equipment can determine the transmitting power when forwarding the signals of different terminal equipment in the coverage range of the network equipment according to the power parameters sent by the network equipment, so that the signal transmission gains of different terminal equipment are different, the signal transmission performance of each terminal equipment is similar, and the coverage performance of the terminal equipment is improved.

Description

Communication method and device Technical Field
The present application relates to the field of wireless communication technologies, and in particular, to a communication method and device.
Background
Compared with Long Term Evolution (LTE) and long term evolution advanced (LTE-a) wireless communication systems, a 5G New Radio (NR) wireless communication system obtains a larger communication bandwidth due to a higher deployed frequency band. However, the high frequency band causes larger path loss and penetration loss than the low frequency band, and the large communication bandwidth also increases noise of the wireless system, so that the coverage performance of NR is far inferior to that of LTE and LTE-a. In addition, since the transmission power of the terminal device is much smaller than that of the network device, the uplink communication performance is much worse than the downlink communication performance. Therefore, the uplink coverage performance problem of NR is more prominent than the downlink coverage performance.
In order to improve the coverage performance of NR, especially the uplink coverage performance, the relay device is one of important solutions. The relay device is used as a special node in a wireless communication network, and the quality of signals received by a sink node is improved by forwarding signals of a source node to the sink node.
At present, the amplification factor of the uplink signal of each terminal device by the relay device is consistent, so that the requirements of the terminal devices located at different positions cannot be met.
Disclosure of Invention
The application provides a communication method and equipment, which are used for meeting the requirements of terminal equipment located at different positions on signal transmission.
In a first aspect, an embodiment of the present application provides a communication method, including: the relay device receives a power parameter from the network device, wherein the power parameter corresponds to the first terminal device; the relay equipment receives a first signal from the first terminal equipment, wherein the first signal carries first information; the relay equipment determines first transmission power of a second signal according to the first signal and the power parameter; wherein the second signal carries the first information; and the relay equipment adopts the first transmission power to send the second signal to the network equipment.
Based on the scheme, the relay equipment can determine different transmitting powers for the signals of the terminal equipment within the coverage range of the network equipment according to the power parameters corresponding to different terminal equipment and sent by the network equipment, so that the signal transmission gains of the terminal equipment at different positions are different, and the uplink coverage requirements of the terminal equipment at different positions within the coverage range of the network equipment are met.
In one possible implementation, the power parameter may also correspond to at least one second terminal device other than the first terminal device.
The at least one second terminal device may here be a second terminal device located in a similar channel environment. Similar channel environments may be similar terminal device to relay device path loss or may also be similar terminal device to network device path loss.
Based on the scheme, the relay device can determine the transmitting power when the signal of the terminal device in the similar channel environment is forwarded according to the power parameter of at least one second terminal device, the relay device does not need to determine the power parameter for each terminal device, and the signaling overhead can be reduced.
In a possible implementation manner, the determining, by the relay device, the first transmission power of the second signal according to the first signal and the power parameter includes: determining a first transmission power of the second signal according to the characteristic information of the first signal and the power parameter; the characteristic information of the first signal is obtained by detecting the first signal through the relay device, or the characteristic information of the first signal is obtained by detecting the DCI (dedicated downlink control information) sent by the network device through the relay device; wherein the characteristic information of the first signal may include, but is not limited to, at least one of: the number of physical resource blocks PRB occupied by the first signal and a modulation and coding scheme MCS corresponding to the first signal.
Based on the scheme, the relay equipment can determine the transmission power when sending the signal through the characteristic information of the signal, and enhance the gain of the signal received by the network equipment. In addition, a special DCI signaling is added for indicating the characteristic information of the signal to the relay equipment by the network equipment, so that the communication performance between the relay equipment and the network equipment is improved.
In a possible implementation, the power parameter may be carried in a higher layer signaling; wherein the power parameter may include, but is not limited to, at least one of: a power target value and a path loss compensation factor; wherein the power target value is a power at which the network device expects to receive the second signal; the path loss compensation factor is a proportion of the path loss of the network device to the relay device that needs to be compensated.
Based on the scheme, the relay equipment can determine the transmitting power of the signal of the forwarding terminal equipment according to the power target value and the path loss, and can enhance the gain of the signal received by the network equipment.
In one possible implementation, before receiving the first signal from the first terminal device, the method further includes: the relay device receives proprietary DCI from the network device, the proprietary DCI being indicative of receiving the first signal from the first terminal device and transmitting the second signal to the network device.
Based on the scheme, the network device can indicate the time-frequency resource of the signal received by the relay device and the time-frequency resource of the signal sent by the relay device through the DCI special for the relay device.
In one possible implementation manner, the determining, by the relay device, the first transmission power of the second signal according to the first signal and the power parameter includes: when a third signal of a second terminal device sent to the network device overlaps with the second signal in time, if the priority of the third signal is higher than that of the second signal, the relay device determines the first transmission power according to the first signal, the power parameter and the transmission power of the third signal, wherein the value of the first transmission power is not greater than the difference between the maximum transmission power and the transmission power of the third signal.
Here, the priority of the third signal and the priority of the second signal may be the priority of the second terminal device and the priority of the first terminal device.
Based on the scheme, the relay equipment can ensure the uplink coverage performance of the terminal equipment with high priority under the condition that the total transmission power is limited, so that the flexibility of the relay equipment is improved.
In one possible implementation, the priority is configured by the network device through relay device specific DCI; alternatively, the priority is determined by at least one of a number of PRBs occupied by the first signal and/or the third signal and an MCS corresponding to the signal.
Based on the scheme, the relay device may indicate the priority through the relay device specific DCI according to the network device, or the relay device may also determine the priority according to the information of the signal.
In a second aspect, an embodiment of the present application provides another communication method, including that a network device sends a power parameter to a relay device, where the power parameter corresponds to a first terminal device; the network equipment receives a second signal sent by the relay equipment, wherein the second signal carries first information; the first transmission power of the second signal is determined by the relay device through the first signal carrying the first information and the power parameter received from the first terminal device.
In one possible implementation, the power parameter may also correspond to at least one second terminal device other than the first terminal device.
In one possible implementation, the sending, by the network device, the power parameter to the relay device includes: the network equipment sends power parameters to the relay equipment through high-level signaling; wherein the power parameter comprises at least one of: a power target value and a path loss compensation factor; wherein the power target value is the power that the network equipment expects to receive the uplink signal to be forwarded; the path loss compensation factor is a proportion of a path loss of the network device to the relay device that needs to be compensated.
In a possible implementation manner, after the network device sends the power parameter to the relay device, the method further includes: the network equipment transmits the characteristic information of the first signal to the relay equipment through the special DCI; the characteristic information of the first signal comprises at least one of: the number of physical resource blocks PRB occupied by the first signal and a modulation coding scheme MCS corresponding to the first signal.
In a possible implementation manner, before the network device receives the second signal sent by the relay device, the method further includes: the network device transmits proprietary DCI to the relay device, the proprietary DCI indicating to receive the first signal from the first terminal device and to transmit the second signal to the network device.
In a possible implementation manner, if there are a plurality of terminal devices assisted by the relay device, before the network device receives the second signal sent by the relay device, the method further includes: and the network equipment sends the priorities corresponding to the plurality of terminal equipment to the relay equipment through the special DCI.
In a third aspect, an embodiment of the present application further provides a terminal device, where the terminal device may be configured to perform operations in any possible implementation manner of the first aspect and the first aspect. For example, the terminal device may comprise means or unit for performing the respective operations in the first aspect or any possible implementation manner of the first aspect. For example comprising a processing unit and a communication unit.
In a fourth aspect, an embodiment of the present application further provides a network device, where the network device may be configured to perform operations in the second aspect and any possible implementation manner of the second aspect. For example, the network device may comprise modules or units for performing the respective operations in the second aspect or any possible implementation of the second aspect. For example comprising a processing unit and a communication unit.
In a fifth aspect, an embodiment of the present application further provides a communication system, which includes the terminal device in the third aspect and the network device in the fourth aspect.
In a sixth aspect, an embodiment of the present application provides a chip system, including a processor, and optionally a memory; wherein the memory is configured to store a computer program, and the processor is configured to call and run the computer program from the memory, so that the communication device with the system-on-chip installed therein executes any one method of the first aspect or any possible implementation manner of the first aspect; and/or cause a communication device in which the system-on-chip is installed to perform any of the methods of the second aspect or any possible implementation of the second aspect described above.
In a seventh aspect, an embodiment of the present application provides a computer program product, which includes computer program code, when executed by a communication unit, a processing unit, or a transceiver, a processor of a communication device, causes the communication device to perform any one of the methods in the first aspect or any possible implementation manner of the first aspect; and/or such that a communication device having a system-on-chip installed thereon may perform any of the methods of the second aspect or any possible implementation of the second aspect.
In an eighth aspect, embodiments of the present application provide a computer-readable storage medium, where a program is stored, and the program enables a communication device (e.g., a terminal device) to perform any one of the methods in the first aspect or any possible implementation manner of the first aspect; and/or cause a communication device (e.g., a network device) on which the system-on-chip is installed to perform any of the methods of the second aspect or any possible implementation of the second aspect described above.
Technical effects that can be achieved by any one of the possible implementations in the second aspect to the eighth aspect may refer to technical effects of corresponding possible implementations in the first aspect, and are not repeated here.
Drawings
Fig. 1 is a communication system provided in the present application;
fig. 2 is a schematic flow chart of a communication method provided in the present application;
fig. 3 is a schematic view of an application scenario of a communication method provided in the present application;
fig. 4 is a power diagram of signals of each terminal device provided in the present application;
fig. 5 is a schematic diagram of a relay device provided in the present application;
fig. 6 is a schematic diagram of a network device provided in the present application;
fig. 7 is a schematic diagram of a communication device provided in the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail with reference to the accompanying drawings. The particular methods of operation in the method embodiments may also be applied in device embodiments or system embodiments.
The technical scheme of the embodiment of the application can be applied to various communication systems, for example: long Term Evolution (LTE) systems, Worldwide Interoperability for Microwave Access (WiMAX) communication systems, future fifth Generation (5th Generation, 5G) systems, such as new radio access technology (NR), and future communication systems, such as 6G systems, etc.
The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.
The embodiment of the application can be applied to a traditional typical network, and can also be applied to a future UE-centric (UE-centric) network. A UE-centric network introduces a network architecture without a cell (Non-cell), that is, a large number of small stations are deployed in a certain area to form a super cell (super cell), each small station is a Transmission Point (TP) or a Transmission and Reception Point (TRP) of the super cell, and is connected to a centralized controller (controller). When the UE moves in the Hyper cell, the network side equipment selects a new sub-cluster for the UE to serve, thereby avoiding real cell switching and realizing the continuity of UE service. The network side device comprises a wireless network device. Or, in a network with UE as the center, multiple network side devices, such as small stations, may have independent controllers, such as distributed controllers, each small station may independently schedule users, and there is interaction information between small stations over a long period of time, so that there is also a certain flexibility when providing cooperative service for UE.
In the embodiment of the present application, different base stations may be base stations with different identities, and may also be base stations with the same identity and deployed in different geographic locations. Since the base station does not know whether the base station relates to the application scenario of the embodiment of the present application before the base station is deployed, the base station or the baseband chip should support the method provided by the embodiment of the present application before the base station is deployed. It is to be understood that the base stations with different identities may be base station identities, cell identities, or other identities.
Some scenarios in the embodiment of the present application are described by taking a scenario of an NR network in a wireless communication network as an example, it should be noted that the scheme in the embodiment of the present application may also be applied to other wireless communication networks, and corresponding names may also be replaced by names of corresponding functions in other wireless communication networks.
For the convenience of understanding the embodiments of the present application, a communication system applicable to the embodiments of the present application will be first described in detail by taking the communication system shown in fig. 1 as an example. As shown in fig. 1, the communication system includes a network device 101, a relay device 102, and a terminal device 106, where the network device 101 may be configured with multiple antennas, and the relay device 102 and the terminal device 106 may also be configured with multiple antennas.
It should be understood that network device 101 may also include a number of components associated with signal transmission and reception (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, etc.).
The network device 101 may be a device with a wireless transceiving function or a chip provided in the device, and the device includes but is not limited to: evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), home base station (e.g., home evolved Node B, or home Node B, HNB), baseband unit (BBU), wireless fidelity (WIFI) system Access Point (AP), wireless relay Node, wireless backhaul Node, transmission point (TRP or transmission point, TP), etc., and may also be 5G, such as NR, a gbb in the system, or a transmission point (TRP or TP), a set (including multiple antennas) of a base station in the 5G system, or a panel of a base station (including multiple antennas, or a BBU) in the 5G system, or, Distributed Units (DUs), etc.
In some deployments, the gNB may include a Centralized Unit (CU) 201 and a DU 202. The gNB may also include a Radio Unit (RU). The CU implements part of the function of the gNB, and the DU implements part of the function of the gNB, for example, the CU implements Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP) layers, and the DU implements Radio Link Control (RLC), Medium Access Control (MAC) and Physical (PHY) layers. Since the information of the RRC layer is eventually converted into or from the information of the PHY layer, the higher layer signaling, such as RRC layer signaling or PDCP layer signaling, may also be considered to be transmitted by the DU or DU + CU under this architecture. It is to be understood that the network device may be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU may be divided into network devices in the access network RAN, or may be divided into network devices in the core network CN, which is not limited herein.
Terminal equipment 106 may also be referred to as User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The embodiments of the present application do not limit the application scenarios. In the present application, a terminal device having a wireless transceiving function and a chip that can be installed in the terminal device are collectively referred to as a terminal device.
The relay device 102, which may also be referred to as a network repeater, interworks with homogeneous network segments having the same interface and the same medium access control protocol. It may amplify and retransmit the transmitted signal. Therefore, signal attenuation caused by overlong cable lines of the network segment can be avoided, and the transmission reliability is effectively improved. A relay device may also be understood as an interconnected device that constructively implements a network at the physical level. With the continuous development of computer communication network technology and equipment, the functions of the relay equipment must be greatly increased, and the relay equipment is more efficient and safer.
In this communication system, each of the network device 101 and the relay device 102 can communicate with a plurality of terminal devices (e.g., the terminal device 106 shown in the figure). Network device 101 and relay device 102 may communicate with one or more terminal devices similar to terminal device 106. It should be understood that the terminal device communicating with the network device 101 and the terminal device communicating with the relay device 102 may be the same or different. The terminal device 106 shown in fig. 1 may communicate with the network device 101 and the relay device 102 at the same time, but this only shows one possible scenario, and in some scenarios, the terminal device may also communicate with only the network device 101 or the relay device 102, which is not limited in this application.
It should be understood that fig. 1 is a simplified schematic diagram of an example for the sake of understanding only, and that other network devices 101 or other terminal devices 106, which are not shown in fig. 1, may also be included in the communication system.
At present, fixed gain forwarding of uplink signals is a common method for forwarding uplink signals by relay equipment. The method adopts fixed gain to amplify the transmitting power of the uplink signal of each terminal device forwarded by the relay device, wherein the amplified transmitting power meets the formula (1):
Figure PCTCN2020071544-APPB-000001
wherein, P input,n Indicating the power, P, of the uplink signal of terminal device n received by the relay device n Indicating the transmission power at which the relay device forwards the uplink signal of terminal device n,
Figure PCTCN2020071544-APPB-000002
the gain multiple is shown, N is 1,2,3 …, and N is the number of terminal devices to which the relay device forwards the uplink signal.
In addition, the transmission power of the relay device is usually limited, when the total uplink transmission power is greater than the upper limit at a certain time, i.e. P > P total The relay device will reduce the gain multiple
Figure PCTCN2020071544-APPB-000003
To ensure that P is less than or equal to P total . Wherein, P total The upper limit of the transmission power of the relay equipment is represented, P represents the total uplink transmission power of the relay equipment, and the total uplink transmission power of the relay equipment
Figure PCTCN2020071544-APPB-000004
The fixed gain forwarding method in the prior art has the advantages of simplicity and easy implementation. However, this method has poor flexibility, and cannot meet the uplink coverage requirements of terminal devices located at different positions within the coverage area of the network device. In the following, the fixed gain forwarding method is explained by taking two terminal devices as an example without loss of generality.
The terminal device 1 and the terminal device 2 are both located at the edge of the cell, the distance from the terminal device 1 to the network device is greater than the distance from the terminal device 2 to the network device, and the distance from the terminal device 1 to the relay device is greater than the distance from the terminal device 2 to the relay device. Therefore, the signal power of the relay device reception terminal device 1 is lower than the signal power of the relay device reception terminal device 2. And because the relay device adopts fixed gain forwarding, the signal power of the terminal device 1 forwarded by the network device receiving relay device is also lower than the signal power of the terminal device 2 forwarded by the network device receiving relay device. As can be seen from the maximum ratio combining method, the performance of the terminal apparatus 1 is necessarily inferior to that of the terminal apparatus 2. However, in order to meet uplink coverage requirements of terminal devices in different locations, it is necessary that the performances of the terminal device 1 and the terminal device 2 are similar. It can be seen that the fixed gain forwarding method cannot meet this requirement.
Based on the above requirements, the present application provides a communication method, so as to implement that a relay device forwards, to a network device, a signal sent by a terminal device at different positions by using different gains, thereby meeting uplink coverage requirements of the terminal devices at different positions. In the following, without loss of generality, the embodiment of the present application is described in detail by taking an interaction process between a terminal device and a relay device as an example, where the terminal device may be a terminal device in a wireless communication system and having a wireless connection relationship with the relay device. It is understood that the relay device may transmit the data packet based on the same technical scheme with a plurality of terminal devices having a wireless connection relationship in the wireless communication system. This is not a limitation of the present application.
Fig. 2 is an exemplary flowchart of a communication method provided by the embodiment of the present application, which is shown from the perspective of device interaction. As shown in fig. 2, the method may include the steps of:
step 201: the network device sends the power parameter to the relay device.
The power parameter here may be a power parameter corresponding to the first terminal device. For example, the power parameter may be a power parameter of the first terminal device, and the relay device may forward the first signal of the first terminal device according to the power parameter. Alternatively, the power parameter may also be a power parameter corresponding to at least one second terminal device other than the first terminal device. For example, it may be a power parameter of at least one second terminal device, other than the first terminal device, within the coverage area of the network device. The relay device may forward the first signal of the first terminal device and the at least one second terminal device according to the power parameter.
Step 202: the relay device receives a first signal from a first terminal device. Wherein the first signal carries first information.
The relay device may also receive Downlink Control Information (DCI) from the network device before the relay device receives the first signal from the first terminal device. The DCI is used for instructing the relay device to receive a first signal from the first terminal device and to transmit a second signal to the network device.
In an example, the DCI may include a time domain location indication and a frequency domain resource indication of a received signal of the first terminal device. The relay device receives the first signal according to the time domain position indication and the frequency domain resource indication of the received signal.
In another example, the DCI may include time domain location indications and frequency domain resource indications of received signals of a plurality of terminal devices, and an index of the terminal device. The index of the terminal device may correspond to the time domain location indication and the frequency domain resource indication of the received signal one to one. And the relay equipment receives the first signal of the terminal equipment corresponding to the index according to the index of the terminal equipment and the time domain position indication and the frequency domain resource indication of the received signal corresponding to the index.
Step 203: and the relay equipment determines first transmission power for transmitting a second signal according to the first signal and the power parameter. Wherein the second signal carries the first information.
In an example, the power parameter may include a power target value. Wherein, the power target value refers to the power of the network device expecting to receive the second signal, and can be P o,n . The power target value here relates to a path loss from the first terminal device to the network device, the larger the path loss, the larger the power target value. The path loss may be obtained by the network device through a channel Sounding Reference Signal (SRS) measured and reported by the first terminal device.
It should be understood that, according to the maximum ratio combining method, the power target value of the terminal device with a larger path loss is increased, and the uplink coverage performance of the terminal device with a larger path loss can be improved.
In another example, the power parameter may also include a path loss compensation factor. The path loss compensation factor refers to a compensation factor of at least one path loss from the relay device to the network device, and can be represented by α, and the value range of α is greater than or equal to 0 and less than or equal to 1. The path loss compensation factor here is predetermined based on an empirical value.
In implementation, the network device may send the power parameter to the relay device through higher layer signaling.
In one possible implementation, the relay device may determine the first transmission power for transmitting the second signal according to the path loss compensation factor, the path loss PL from the relay device to the network device, and the target power value. For example, the first transmission power P n The following formula (3) may be satisfied:
P n ＝P o,n + alpha PL formula (3)
Where PL may represent the relay device to network device path loss. PL here is estimated by the relay device using a channel state information-reference signal (CSI-RS). Wherein the CSI-RS can be transmitted to the relay device by the network device.
In another possible implementation manner, the relay device may further determine the first transmission power for transmitting the second signal according to the characteristic information and the power parameter of the first signal.
In an example, the characteristic information of the first signal may include a number of Physical Resource Blocks (PRBs) occupied by the first signal, which may be M RB,n And (4) showing. For example, M RB,n May be the number of PRBs used by the first terminal device in transmitting the first signal in the 15KHz subcarrier spacing condition. It should be noted that, the larger the number of PRBs indicates that the signal bandwidth is larger, the larger the first transmission power should be, so as to ensure the stability of the signal to noise ratio (SNS) of the second signal, thereby ensuring the transmission performance of the second signal.
In another example, the characteristic information of the first signal may further include a Modulation and Coding Scheme (MCS) corresponding to the first signal, and may be Δ TF,n And (4) showing. Since the coding rate is faster with larger modulation orders, a high SNR is more necessary to guarantee the transmission performance of the second signal. The larger the MCS, the larger the first transmit power should be.
When the relay equipment determines first transmission power for transmitting a second signal according to the characteristic information and the power parameter of the first signal, the first transmission power P n The following formula (4) can be satisfied:
P n ＝P o,n +α·PL+10log 10 (2 μ ·M RB,n )+△ TF,n formula (4)
Where μ denotes a subcarrier spacing supported by the wireless communication system, μ — 0,1, …, Z, where Z may be a positive integer, e.g., Z may be equal to 4.
In another possible implementation manner, the relay device may further consider a forwarding power offset state value f of the first signal of the first terminal device when determining the first transmission power n . Wherein f is n For the closed loop power control parameter, the f may be adjusted according to the transmission power of the first signal of the first terminal device forwarded by the last relay device n . For example, the first transmission power of the second signal is F when the relay device forwards the first signal of the first terminal device last time 0 The relay device may be according to F 0 Determining fn, the first transmit power at which the second signal is transmitted may be based on f n A first transmit power is determined. Wherein the first transmit power may satisfy the following formula (5):
P n ＝P o,n +α·PL+10log 10 (2 μ ·M RB,n )+△ TF,n +f n formula (5)
In practice, M RB,n 、△ TF,n And f n Since there is a rapid change, the network device may send M to the relay device via the relay device's proprietary DCI RB,n 、△ TF,n And f n . Alternatively, the characteristic information of the first signal may also be obtained by the relay device through detection of the first signal.
Step 204: and the relay equipment adopts the first transmission power to send the second signal to the network equipment.
And the network equipment receives a second signal sent by the relay equipment.
In an example, the DCI may further include a time domain location indication and a frequency domain resource indication of a transmission signal of the first terminal device. And the relay equipment transmits a second signal according to the time domain position indication and the frequency domain resource indication of the transmitted signal.
In another example, the DCI may further include a time domain location indication and a frequency domain resource indication of received signals of a plurality of terminal devices, and an index of the terminal device. The index of the terminal device may correspond to the time domain location indication and the frequency domain resource indication of the transmission signal one to one. And the relay equipment sends the second signal of the terminal equipment corresponding to the index in the time domain position indication and the frequency domain resource indication of the sending signal corresponding to the index.
In a possible implementation manner, when a third signal of a second terminal device sent to the network device overlaps with the second signal in time, if a priority of the third signal is higher than a priority of the second signal, the relay device may determine the first transmission power according to the first signal, the power parameter, and a transmission power of the third signal, where a value of the first transmission power is not greater than a difference between a maximum transmission power and the transmission power of the third signal.
For example, the time when the relay device sends the third signal of the second terminal device to the network device is t 0 -t 3 The time when the relay equipment sends the second signal to the network equipment is t 1 -t 4 Wherein, t 1 At t 0 -t 3 In the meantime. Then, the relay device needs to compare the priority of the second terminal device with the priority of the first terminal device. If the priority of the second terminal device is higher than the priority of the first terminal device, the first transmission power value of the second signal needs to be not greater than the maximum transmission power P of the relay device total With transmission power f of the third signal 3 Difference value P of total -f 3 。
In another possible implementation manner, when the power parameter received by the relay device changes, or the number of the received power parameters changes, the relay device may determine whether the total power for transmitting the uplink signal to the network device is greater than or equal to the maximum transmission power. When the total transmission power of the relay device is greater than or equal to the maximum transmission power, the relay device may reduce the transmission power of the signal of the terminal device with the lower priority according to the priority of each terminal device. For example, the relay device needs to send the second signal of the first terminal device and the third signal of the second terminal device to the network device within a specified duration. If the sum of the first transmission power of the second signal and the transmission power of the third signal is greater than the maximum transmission power, the relay device needs to determine the priorities of the first terminal device and the second terminal device. If the priority of the second terminal device is greater than the priority of the first terminal device, the relay device needs to reduce the first transmission power of the second signal of the first terminal device. Wherein the first transmit power should not be greater than a difference between the maximum transmit power and a transmit power of the third signal.
In another possible implementation manner, when the power parameter received by the relay device changes or the number of the received power parameters changes, the relay device may determine whether the total power of the uplink signals sent to the network device is greater than or equal to the maximum transmission power. When the total transmission power of the relay device is greater than or equal to the maximum transmission power, the relay device may give up sending the signal of the terminal device with the lower priority according to the priority of each terminal device. For example, the relay device needs to send the second signal of the first terminal device and the third signal of the second terminal device to the network device within the specified duration. If the sum of the first transmission power of the second signal and the transmission power of the third signal is greater than the maximum transmission power, the relay device needs to determine the priority of the first terminal device and the priority of the second terminal device. If the priority of the second terminal device is greater than the priority of the first terminal device, the relay device may forgo sending the second signal to the network device.
In an example, the priority can be sent by the network device. The network device may carry the priority of the terminal device in the DCI.
In another example, the priority may be determined according to the MCS of the terminal device. For example, it may be that the larger the MCS, the higher the priority; alternatively, the smaller the MCS, the higher the priority.
In yet another example, the priority may also be determined according to a transmission bandwidth of the terminal device. For example, it may be that the larger the transmission bandwidth, the higher the priority; alternatively, it may be that the smaller the transmission bandwidth, the higher the priority.
In yet another example, the priority may be determined according to a path loss of the terminal device. The path loss may be a path loss from the terminal device to the network device, or the path loss may also be a path loss from the terminal device to the relay device. For example, it may be that the larger the path loss, the larger the priority; alternatively, the smaller the path loss, the higher the priority.
In yet another possible implementation, the priority may also be determined in combination with the MCS, transmission bandwidth, and path loss of the terminal device. For example, the relay device may determine the priority of the terminal device according to the MCS, and if the MCSs of the plurality of terminal devices are the same, the relay device may determine the priority of the terminal device according to the transmission bandwidth. If the transmission bandwidths of the plurality of terminal devices are the same, the relay device may further determine the priority of the terminal device according to the path loss.
It should be understood that the relay device may preferentially determine the priority of the terminal device according to one of the parameters of MCS, transmission bandwidth or path loss, further determine the priority according to another parameter other than the one of the parameters, and further determine the priority of the terminal device according to the remaining one of the parameters. The order of the parameters is not particularly limited in this application.
Next, a communication method provided in the present application is explained with specific embodiments.
As shown in fig. 3, terminal devices 303, 304, and 305 are located at the edge of the coverage of network device 301, while being located within the coverage of relay device 302. The terminal device 304 is farthest from the network device 301, the terminal device 305 is next, and the terminal device 303 is closest to the network device 301.
The relay device 302 receives the power parameters of the terminal devices 303, 304, and 305 and the characteristic information of the uplink signal transmitted by the network device 301. Alternatively, the relay device may detect the uplink signals of the terminal devices 303, 304, and 305, respectively, and obtain the feature information of the uplink signals of the terminal devices. Further, relay device 302 receives uplink signal a of terminal device 303, uplink signal b of terminal device 304, and uplink signal c of terminal device 305.
Further, the relay device determines the transmission power f of the forwarding signal a' when forwarding the uplink signal a of the terminal device 303 according to the power parameter of the terminal device 303 and the characteristic information of the uplink signal a . Similarly, the relay devices respectively determine the transmitting power f of the forwarding signal b' of the terminal device 304 b And the transmission power f of the forwarded signal c' of the terminal device 305 c 。
The power of the forwarded signals of the terminal devices 303, 304 and 305 received by the network device is shown in fig. 4. Therefore, the relay device determines different power gains for uplink signals of different terminal devices, so that the powers of the uplink signals of the terminal devices at different positions received by the network device are similar, thereby improving the uplink coverage performance of the terminal device.
The communication method according to the embodiment of the present application is described in detail above with reference to fig. 1 to 4. The communication device according to the embodiment of the present application is described in detail below with reference to fig. 1 to 4.
Fig. 5 is a schematic structural diagram of a network device provided in an embodiment of the present application, for example, a schematic structural diagram of a base station. As shown in fig. 5, the base station can be applied to the system shown in fig. 1, and performs the functions of the centralized unit in the above method embodiments. The base station 50 may include one or more radio frequency units, such as a Remote Radio Unit (RRU) 501 and one or more baseband units (BBUs) (also referred to as digital units, DUs) 502. The RRU501, which may be referred to as a transceiver unit, transceiver circuitry, or transceiver, etc., may include at least one antenna 5011 and a radio frequency unit 5012. The RRU501 is mainly used for transceiving radio frequency signals and converting radio frequency signals and baseband signals, for example, for sending the PDCP data unit described in the above embodiment to a distributed unit. The BBU 502 is mainly used for performing baseband processing, controlling a base station, and the like. The RRU501 and the BBU 502 may be physically disposed together, or may be physically disposed separately, that is, a distributed base station.
The BBU 502 is a control center of a base station, and may also be referred to as a processing unit, and is mainly used for performing baseband processing functions, such as channel coding, multiplexing, modulation, and spreading. For example, the BBU (processing unit) 502 can be used to control the base station to perform the operation flow related to the centralized unit in the above method embodiment.
In an example, the BBU 502 may be formed by one or more boards, and the boards may jointly support a radio access network (e.g., an LTE network) with a single access indication, or may respectively support radio access networks (e.g., LTE networks, 5G networks, or other networks) with different access schemes. The BBU 502 also includes a memory 5021 and a processor 5022, the memory 5021 being used to store necessary instructions and data. For example, the memory 5021 stores the synchronization protocol header in the above-described embodiment. The processor 5022 is configured to control the base station to perform necessary actions, such as controlling the base station to perform the operation procedures of the centralized unit in the above method embodiments. The memory 5021 and the processor 5022 may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.
Fig. 6 is a schematic structural diagram of a network device according to an embodiment of the present application, for example, a schematic structural diagram of a base station. As shown in fig. 6, the base station can be applied to the system shown in fig. 1, and performs the functions of the distributed units in the above method embodiments. The base station 60 may include one or more radio frequency units, such as a Remote Radio Unit (RRU) 601 and one or more baseband units (BBUs) (also referred to as digital units, DUs) 602. The RRU601 may be referred to as a transceiver unit, transceiver circuit, or transceiver, etc., and may include at least one antenna 6011 and a radio frequency unit 6012. The RRU6011 is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals and baseband signals, for example, to send the MAC data unit described in the foregoing embodiments to a terminal device. The BBU 602 is mainly used for performing baseband processing, controlling a base station, and the like. The RRU601 and the BBU 602 may be physically disposed together, or may be physically disposed separately, that is, a distributed base station.
The BBU 602 is a control center of a base station, and may also be referred to as a processing unit, and is mainly used for performing baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and the like. For example, the BBU (processing unit) 602 can be used to control the base station to perform the operation flow related to the distributed unit in the above method embodiment.
In an example, the BBU 602 may be formed by one or more boards, and the boards may jointly support a radio access network (e.g., an LTE network) with a single access indication, or may respectively support radio access networks (e.g., LTE networks, 5G networks, or other networks) with different access schemes. The BBU 602 also includes a memory 6021 and a processor 6022, with the memory 6021 being configured to store the necessary instructions and data. The processor 6022 is configured to control the base station to perform necessary actions, for example, to control the base station to execute the operation flow of the centralized unit in the above method embodiment. The memory 6021 and processor 6022 may serve one or more single boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.
Fig. 7 shows a schematic structural diagram of a communication apparatus 700. The apparatus 700 may be used to implement the methods described in the above method embodiments, and reference may be made to the description of the above method embodiments. The communication apparatus 700 may be a chip, a network device (e.g., a base station), a terminal device or other network devices.
The communication device 700 includes one or more processors 701. The processor 701 may be a general-purpose processor or a special-purpose processor, etc. For example, a baseband processor, or a central processor. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control a communication device (e.g., a base station, a terminal device, or a chip, etc.), execute a software program, and process data of the software program. The communication device may include a transceiving unit to enable input (reception) and output (transmission) of signals. For example, the communication device may be a chip, and the transceiving unit may be an input and/or output circuit of the chip, or a communication interface. The chip can be used for terminal equipment or a base station or other network equipment. As another example, the communication device may be a terminal device or a base station or other network devices, and the transceiver unit may be a transceiver, a radio frequency chip, or the like.
The communication apparatus 700 includes one or more processors 701, and the one or more processors 701 may implement the method of the relay device or the network device in the embodiment shown in fig. 2.
In one possible design, the communication device 700 includes means (means) for determining a first transmit power of the second signal and for receiving a power parameter or transmitting the second signal. The function of determining the means of the first transmit power of the second signal may be implemented by one or more processors. The first transmit power of the second signal may be determined, for example, by one or more processors, receiving a power parameter or transmitting the second signal through a transceiver, or an input/output circuit, or an interface of a chip. The first transmission power of the second signal may be as described in the above method embodiment.
In one possible design, the communication device 700 includes means (means) for transmitting power parameters and receiving signals. The power parameter and how to transmit the power parameter can be referred to the related description in the above method embodiment. The power parameter may be transmitted, for example, through a transceiver, or an input/output circuit, or an interface of a chip.
Optionally, the processor 701 may also implement other functions besides the method of the embodiment shown in fig. 2.
Alternatively, in one design, the processor 701 may execute instructions to cause the communication apparatus 700 to perform the method described in the above method embodiment. The instructions may be stored in whole or in part within the processor, such as instructions 703, or in whole or in part in a memory 702 coupled to the processor, such as instructions 704, or may collectively cause the communication apparatus 700 to perform the method described in the above method embodiments, through instructions 703 and 704.
In yet another possible design, the communication apparatus 700 may also include a circuit, which may implement the functions of the relay device or the network device in the foregoing method embodiments.
In yet another possible design, the communication device 700 may include one or more memories 702 having instructions 704 stored thereon, which are executable on the processor to cause the communication device 700 to perform the methods described in the above method embodiments. Optionally, the memory may further store data therein. Instructions and/or data may also be stored in the optional processor. For example, the one or more memories 702 may store the synchronization protocol header described in the above embodiments, or the PDCP indication information referred to in the above embodiments, and the like. The processor and the memory may be provided separately or may be integrated together.
In yet another possible design, the communication device 700 may further include a transceiver 705 and an antenna 706. The processor 701 may be referred to as a processing unit, and controls a communication apparatus (terminal device or base station). The transceiver 705 may be referred to as a transceiver, a transceiving circuit, a transceiver, or the like, and is used for implementing transceiving functions of the communication device through the antenna 706.
The present application also provides a communication system comprising one or more of the aforementioned network devices, and one or more relay devices.
It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip having signal processing capability. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and combines hardware thereof to complete the steps of the method.
It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. The volatile Memory may be a Random Access Memory (RAM) which serves as an external cache. By way of example, and 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 SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.
The present application further provides a computer-readable medium, on which a computer program is stored, where the computer program is executed by a computer to implement the communication method in any of the above method embodiments.
The embodiment of the present application further provides a computer program product, and when executed by a computer, the computer program product implements the communication method described in any one of the method embodiments.
In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., Digital Video Disk (DVD)), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
The embodiment of the application also provides a processing device, which comprises a processor and an interface; the processor is configured to execute the communication method according to any one of the above method embodiments.
It should be understood that the processing device may be a chip, the processor may be implemented by hardware or software, and when implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented in software, the processor may be a general-purpose processor, which may be implemented by reading software code stored in a memory, which may be integrated in the processor, located external to the processor, or stand-alone.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.
Additionally, the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that in the embodiment of the present application, "B corresponding to a" means that B is associated with a, from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the elements may be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present application.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented in hardware, firmware, or a combination thereof. When implemented in software, the functions described above may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. Taking this as an example but not limiting: computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Furthermore. Any connection is properly termed a computer-readable medium. For example, if software is transmitted from a website, a server, or other remote sources using a coaxial cable, a fiber optic cable, a twisted pair, a Digital Subscriber Line (DSL), or a wireless technology such as infrared, radio, and microwave, the coaxial cable, the fiber optic cable, the twisted pair, the DSL, or the wireless technology such as infrared, radio, and microwave are included in the fixation of the medium. Disk (Disk) and disc (disc), as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy Disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
In short, the above description is only a preferred embodiment of the present disclosure, and is not intended to limit the scope of the present disclosure. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (31)

  1. A method of communication, comprising:
    the relay device receives a power parameter from the network device, wherein the power parameter corresponds to the first terminal device;
    the relay device receives a first signal from the first terminal device, wherein the first signal carries first information;
    the relay equipment determines first transmission power of a second signal according to the first signal and the power parameter; wherein the second signal carries the first information;
    and the relay equipment adopts the first transmission power to send the second signal to the network equipment.
  2. The method of claim 1, wherein the power parameter further corresponds to at least one second terminal device other than the first terminal device.
  3. The method of any of claims 1-2, wherein the determining, by the relay device, the first transmit power of the second signal based on the first signal and the power parameter comprises:
    determining a first transmission power of the second signal according to the characteristic information of the first signal and the power parameter;
    the characteristic information of the first signal is obtained by detecting the first signal through the relay device, or the characteristic information of the first signal is obtained by detecting the DCI (dedicated downlink control information) sent by the network device through the relay device;
    wherein the characteristic information of the first signal comprises at least one of:
    the number of physical resource blocks PRB occupied by the first signal and a modulation and coding scheme MCS corresponding to the first signal.
  4. A method according to any one of claims 1 to 3, wherein said power parameter is carried in higher layer signalling; wherein the power parameter comprises at least one of:
    a power target value and a path loss compensation factor; wherein the power target value is a power at which the network device expects to receive the second signal; the path loss compensation factor is a proportion of the path loss of the network device to the relay device that needs to be compensated.
  5. The method according to any of claims 1 to 4, wherein prior to receiving the first signal from the first terminal device, the method further comprises:
    the relay device receives proprietary DCI from the network device, the proprietary DCI being indicative of receiving the first signal from the first terminal device and transmitting the second signal to the network device.
  6. The method of any of claims 1 to 5, wherein the determining, by the relay device, the first transmission power of the second signal according to the first signal and the power parameter comprises:
    when a third signal of a second terminal device sent to the network device overlaps with the second signal in time, if the priority of the third signal is higher than that of the second signal, the relay device determines the first transmission power according to the first signal, the power parameter and the transmission power of the third signal, wherein the value of the first transmission power is not greater than the difference between the maximum transmission power and the transmission power of the third signal.
  7. The method of claim 6, wherein the priority is configured by the network device via a proprietary DCI; or,
    the priority is determined by at least one of a number of PRBs occupied by the first signal and/or the third signal and a MCS to which the signal corresponds.
  8. A method of communication, comprising:
    the network equipment sends a power parameter to the relay equipment, wherein the power parameter corresponds to the first terminal equipment;
    the network equipment receives a second signal sent by the relay equipment, wherein the second signal carries first information;
    wherein the power parameter is used by the relay device to determine the second signal transmit power.
  9. The method of claim 8, wherein the power parameter further corresponds to at least one second terminal device other than the first terminal device.
  10. The method according to any of claims 8-9, wherein the network device sends a power parameter to the relay device, comprising:
    the network equipment sends power parameters to the relay equipment through high-level signaling; wherein the power parameter comprises at least one of:
    a power target value and a path loss compensation factor; wherein the power target value is the power that the network device expects to receive the uplink signal to be forwarded; the path loss compensation factor is a proportion of a path loss of the network device to the relay device that needs to be compensated.
  11. The method according to any of claims 8-10, wherein after the network device sends the power parameter to the relay device, the method further comprises:
    the network equipment sends the characteristic information of the first signal to the relay equipment through the special DCI; the characteristic information of the first signal comprises at least one of:
    the number of physical resource blocks PRB occupied by the first signal and a modulation and coding scheme MCS corresponding to the first signal.
  12. The method according to any one of claims 8-11, wherein before the network device receives the second signal transmitted by the relay device, the method further comprises:
    the network device transmits proprietary DCI to the relay device, the proprietary DCI indicating to receive the first signal from the first terminal device and to transmit the second signal to the network device.
  13. The method according to any one of claims 8 to 12, wherein if there are a plurality of terminal devices assisted by the relay device, before the network device receives the second signal sent by the relay device, the method further includes:
    and the network equipment sends the priorities corresponding to the plurality of terminal equipment to the relay equipment through the special DCI.
  14. A communications apparatus, comprising:
    a transceiving unit for receiving a power parameter from a network device, the power parameter corresponding to a first terminal device; and for receiving a first signal from the first terminal device, wherein the first signal carries first information;
    the processing unit is used for determining first transmission power of a second signal according to the first signal and the power parameter; wherein the second signal carries the first information;
    the transceiver unit is further configured to send the second signal to the network device using the first transmit power.
  15. The communications apparatus of claim 14, wherein the power parameter further corresponds to at least one second terminal device other than the first terminal device.
  16. The communications device according to any one of claims 14-15, wherein the processing unit is further configured to:
    determining a first transmission power of the second signal according to the characteristic information of the first signal and the power parameter; the characteristic information of the first signal is obtained by detecting the first signal by the processing unit, or is obtained by detecting a proprietary DCI sent by a network device by a relay device;
    wherein the characteristic information of the first signal comprises at least one of:
    the number of physical resource blocks PRB occupied by the first signal and a modulation and coding scheme MCS corresponding to the first signal.
  17. A communications device according to any of claims 14-16, wherein the power parameter is carried in higher layer signalling; wherein the power parameter comprises at least one of:
    a power target value and a path loss compensation factor; wherein the power target value is the power that the network device expects to receive the uplink signal to be forwarded; the path loss compensation factor is a proportion of a path loss of the network device to the relay device that needs to be compensated.
  18. The communication device according to any of claims 14-17, wherein the transceiver unit is further configured to:
    prior to receiving a first signal from the first terminal device, receiving proprietary DCI from the network device, the DCI to indicate to receive the first signal from the first terminal device and to transmit the second signal to the network device.
  19. The communications device according to any of claims 15-18, wherein the processing unit is further configured to:
    when a third signal of a second terminal device sent to the network device overlaps with the second signal in time, if the priority of the third signal is higher than the priority of the second signal, determining the first transmission power according to the first signal, the power parameter and the transmission power of the third signal, wherein the value of the first transmission power is not greater than the difference between the maximum transmission power and the transmission power of the third signal.
  20. The communications apparatus of claim 19, wherein the priority is configured by the network device via a proprietary DCI; or,
    the priority is determined by at least one of a number of PRBs occupied by the first signal and/or the third signal and a MCS corresponding to the signal.
  21. A communication apparatus comprising a processing unit and a transceiving unit, wherein:
    the processing unit is used for controlling the transceiver unit to transmit power parameters to the relay equipment, and the power parameters correspond to the first terminal equipment; and
    controlling the transceiver unit to receive a second signal sent by the relay device, wherein the second signal carries first information;
    wherein the power parameter is used by the relay device to determine the second signal transmit power.
  22. The communications apparatus of claim 21, wherein the power parameter further corresponds to at least one second terminal device other than the first terminal device.
  23. The communications apparatus according to any one of claims 21 to 22, wherein the control unit is further configured to control the transceiver unit to transmit the power parameter to the relay device through higher layer signaling; wherein the power parameter comprises at least one of:
    a power target value and a path loss compensation factor; wherein the power target value is the power that the network equipment expects to receive the uplink signal to be forwarded; the path loss compensation factor is a proportion of the path loss of the network device to the relay device that needs to be compensated.
  24. The communications apparatus as claimed in any one of claims 21 to 23, wherein the control unit is further configured to control the transceiver unit to transmit the characteristic information of the first signal to the relay device through a dedicated DCI after transmitting the power parameter to the relay device; wherein the characteristic information of the first signal comprises at least one of:
    the number of physical resource blocks PRB occupied by the first signal and a modulation and coding scheme MCS corresponding to the first signal.
  25. The communications apparatus according to any one of claims 21 to 24, wherein the control unit is further configured to control the transceiver unit to transmit a proprietary DCI to the relay device before receiving the second signal transmitted by the relay device, where the proprietary DCI is used to instruct to receive the first signal from the first terminal device and transmit the second signal to the network device.
  26. The apparatus according to any one of claims 21 to 24, wherein if there are a plurality of terminal devices assisted by the relay device, the control unit is further configured to control the transceiver unit to transmit priorities corresponding to the plurality of terminal devices to the relay device through the dedicated DCI.
  27. A communications apparatus, comprising: a processor and a transceiver, the processor being configured to enable communication via the transceiver and to perform the method of any of claims 1-7 or to perform the method of any of claims 8-13.
  28. A communications device comprising a processor coupled to a memory, the processor being configured to invoke a program stored in the memory to perform a method according to any one of claims 1 to 7, or to perform a method according to any one of claims 8 to 13.
  29. A communications apparatus comprising a processor and a memory, wherein the memory is configured to store computer-executable instructions that, when executed by the processor, cause the apparatus to perform the method of any one of claims 1 to 7 or cause the apparatus to perform the method of any one of claims 8 to 13.
  30. A storage medium having stored thereon a computer program or instructions, which, when executed, cause a processor to perform the method of any one of claims 1-13.
  31. A chip coupled to a memory for reading and executing program instructions stored in the memory to implement the method of any one of claims 1-7 or 8-13.
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