Communication method and related device

Abstract

The invention relates to the technical field of wireless communication, in particular to a communication method and a related device. The method comprises the following steps: receiving target information from first network equipment; the target information is used for indicating correction parameters. And determining the target transmitting power for transmitting the target signal to the second network equipment. The target transmitting power is determined based on a downlink path loss correction result, and the downlink path loss correction result is determined by a correction parameter and a downlink path loss estimation result; the downlink path loss estimation result is determined by a path loss compensation factor configured by the first network device and / or a downlink path loss estimation value measured by the terminal device based on a downlink reference signal of the first network device. By adopting the method, the determined target transmitting power can be more reasonable.

Description

Technical Field

[0001] This application relates to the field of wireless communication technologies, and in particular, to a communication method and related devices. Background Art

[0002] With the rise of new network services such as video live streaming, the improvement of uplink and downlink channel capacity has become one of the research hotspots. For this purpose, a dense deployment scheme of transmission reception points (TRPs) with only uplink reception capabilities has been proposed to achieve the improvement of uplink capabilities. Such a TRP can also be referred to as a single uplink TRP, which can be understood as a small station that only has uplink reception capabilities and does not have downlink transmission capabilities. It should be understood that a single uplink TRP generally needs to be associated with a network device for use, and the terminal device can receive the downlink through this network device.

[0003] During the process of uplink transceiver, the terminal device needs to appropriately adjust the transmission power of the uplink signal to compensate for the effects brought by path loss and shadow fading. In the prior art, the terminal device adjusts the transmission power of the uplink signal based on the path loss measured by the downlink path loss reference signal of the network device associated with the single uplink TRP. However, the path loss between the terminal device and the single uplink TRP is often different from the path loss between the terminal device and the network device associated with the single uplink TRP. Therefore, using the above method easily leads to the adjusted transmission power may be too high or too low, and further makes the interference in the communication system more serious, affecting the communication quality. Summary of the Invention

[0004] To solve the above problems, this application provides a communication method and related devices, which can enable the terminal device to determine a more reasonable uplink transmission power.

[0005] The following introduces this application from multiple aspects. It is easy to understand that the implementation manners of the following multiple aspects can refer to each other.

[0006] In a first aspect, a communication method provided by this application is applicable to a terminal device. The method includes: receiving target information from a first network device, where the target information is used to indicate a correction parameter. Determining a target transmission power for sending a target signal to a second network device, where the target transmission power is determined based on a downlink path loss correction result, and the downlink path loss correction result is determined by the correction parameter and a downlink path loss estimation result, and the downlink path loss estimation result is determined by a path loss compensation factor configured by the first network device and / or a downlink path loss estimation value measured by the terminal device based on a downlink reference signal of the first network device.

[0007] In the above implementation, the terminal device corrects the downlink path loss estimation result by combining the correction parameters configured by the first network device, which makes the determined target transmit power more reasonable and reliable, and can more effectively compensate for the impacts brought by path loss and shadow fading. Using the method provided in this application to determine the uplink transmit power for a single uplink TRP can solve the problem that the determined transmit power in the existing solution may be too high or too low, and can ensure the transmission quality of the uplink between the terminal device and the single uplink TRP.

[0008] In a second aspect, this application provides a communication method, which is applicable to a first network device. The method includes: determining target information for indicating correction parameters. Wherein, the correction parameters and the downlink path loss estimation result are used to determine the downlink path loss correction result, and the downlink path loss correction result is used to determine the target transmit power for the terminal device to send a target signal to a second network device, and the downlink path loss estimation result is determined by a path loss compensation factor configured by the first network device and / or a downlink path loss estimated value measured by the terminal device based on the downlink reference signal of the first network device. Sending the target information to the terminal device.

[0009] Combining at least one of the first aspect to the second aspect, in a possible implementation, the correction parameter includes a first correction parameter, and the downlink path loss correction result satisfies the following formula:

[0010] P X = α × (PL + PL offset )

[0011] Wherein, P X is the downlink path loss correction result, α is the path loss compensation factor, PL is the downlink path loss estimated value, and PL offset is the first correction parameter.

[0012] Combining at least one of the first aspect to the second aspect, in a possible implementation, the correction parameter includes a first correction parameter, and the downlink path loss correction result satisfies the following formula:

[0013] P X = PL + PL offset

[0014] Wherein, P X is the downlink path loss correction result, PL is the downlink path loss estimated value, and PL offset is the first correction parameter.

[0015] Combined with at least one of the first aspect to the second aspect, in a possible implementation, the second network device is a single uplink device and the first network device and the second network device do not perform joint reception, or, the second network device is a single uplink device, the terminal device only performs uplink communication with the second network device and the signal reception quality of the second network device is higher than that of the first network device, PL offset The value of is less than 0.

[0016] Combined with at least one of the first aspect to the second aspect, in a possible implementation, the second network device is a single uplink device, the first network device and the second network device perform joint reception and the propagation loss between the terminal device and the first network device is less than the transmission loss between the terminal device and the second network device, or, the second network device is a single uplink device and the terminal device simultaneously performs uplink communication with the first network device and the second network device, PL offset The value of is greater than 0.

[0017] Combined with at least one of the first aspect to the second aspect, in a possible implementation, the second network device is not a single uplink device, or, the second network device and the first network device are the same device, or, the second network device is a single uplink device, the terminal device only performs uplink communication with the first network device and the signal reception quality of the first network device is higher than that of the second network device, PL offset The value of is 0.

[0018] Combined with at least one of the first aspect to the second aspect, in a possible implementation, the correction parameter includes a second correction parameter, and the downlink path loss correction result satisfies the following formula:

[0019] P X = α × PL × β PL

[0020] Where, P X is the downlink path loss correction result, α is the path loss compensation factor, PL is the downlink path loss estimated value, β PL is the second correction parameter.

[0021] Combined with at least one of the first aspect to the second aspect, in a possible implementation, the correction parameter includes a second correction parameter, and the downlink path loss correction result satisfies the following formula:

[0022] P X = PL × β PL

[0023] Among them, P X is the downlink path loss correction result, PL is the downlink path loss estimated value, and β PL is the second correction parameter.

[0024] Combined with at least one of the first aspect to the second aspect, in a possible implementation, the second network device is a single uplink device and the first network device and the second network device do not perform joint reception, or, the second network device is a single uplink device, the terminal device only performs uplink communication with the second network device and the signal reception quality of the second network device is higher than that of the first network device, β PL has a value greater than 0 and less than 1.

[0025] Combined with at least one of the first aspect to the second aspect, in a possible implementation, the second network device is a single uplink device, the first network device and the second network device perform joint reception and the propagation loss between the terminal device and the first network device is less than the transmission loss between the terminal device and the second network device, or, the second network device is a single uplink device and the terminal device simultaneously performs uplink communication with the first network device and the second network device, β Pl has a value greater than 1.

[0026] Combined with at least one of the first aspect to the second aspect, in a possible implementation, the second network device is not a single uplink device, or, the second network device and the first network device are the same device, or, the second network device is a single uplink device, the terminal device only performs uplink communication with the first network device and the signal reception quality of the first network device is higher than that of the second network device, β P{L has a value of 1.

[0027] Combined with at least one of the first aspect to the second aspect, in a possible implementation, the correction parameter includes a first correction parameter and a second correction parameter, and the downlink path loss correction result satisfies the following formula:

[0028] P X = α × PL + PL offset × β PL

[0029] Among them, P X is the downlink path loss correction result, α is the path loss compensation factor, PL is the downlink path loss estimated value, PL offset is the first correction parameter, and β PL is the second correction parameter.

[0030] Combined with at least one of the first aspect to the second aspect, in a possible implementation manner, the correction parameter includes a first correction parameter and a second correction parameter, and the downlink path loss correction result satisfies the following formula:

[0031] P X = PL + PL offset ×β PL

[0032] Where P X is the downlink path loss correction result, PL is the downlink path loss estimated value, and PL offset is the first correction parameter, and β PL is the second correction parameter.

[0033] Combined with at least one of the first aspect to the second aspect, in a possible implementation manner, the second network device is a single uplink device and the first network device and the second network device do not perform joint reception, or, the second network device is a single uplink device, the terminal device only performs uplink communication with the second network device, and the signal reception quality of the second network device is higher than that of the first network device. The value of β PL is greater than 0 and less than 1, and the value of PL offset is less than 0.

[0034] Combined with at least one of the first aspect to the second aspect, in a possible implementation manner, the second network device is a single uplink device, the first network device and the second network device perform joint reception, and the propagation loss between the terminal device and the first network device is less than the transmission loss between the terminal device and the second network device, or, the second network device is a single uplink device and the terminal device simultaneously performs uplink communication with the first network device and the second network device. The value of β PL is greater than 1, and the value of PL offset is greater than 0.

[0035] Combined with at least one of the first aspect to the second aspect, in a possible implementation manner, the second network device is not a single uplink device, or, the second network device and the first network device are the same device, or, the second network device is a single uplink device, the terminal device only performs uplink communication with the first network device, and the signal reception quality of the first network device is higher than that of the second network device. The value of β PL is 1, and the value of PL offset is 0.

[0036] Combined with at least one of the first aspect to the second aspect, in a possible implementation, the correction parameter is determined by the path loss difference between the terminal device and the first network device and the terminal device and the second network device, and / or the path loss ratio between the terminal device and the first network device and the terminal device and the second network device.

[0037] In a third aspect, the present application provides a communication device, which may be the terminal device mentioned in the foregoing first aspect. The communication device includes a transceiver unit and a processing unit. The transceiver unit is configured to receive target information from a first network device. The target information is used to indicate a correction parameter. The processing unit is configured to determine a target transmission power for sending a target signal to a second network device, where the target transmission power is determined based on a downlink path loss correction result, the downlink path loss correction result is determined by the correction parameter and a downlink path loss estimation result, and the downlink path loss estimation result is determined by a path loss compensation factor configured by the first network device and / or a downlink path loss estimation value measured by the terminal device based on a downlink reference signal of the first network device.

[0038] In a fourth aspect, the present application provides a communication device, which may be the first network device mentioned in the foregoing second aspect. The communication device includes a transceiver unit and a processing unit. The processing unit is configured to determine target information for indicating a correction parameter. The correction parameter and a downlink path loss estimation result are used to determine a downlink path loss correction result, the downlink path loss correction result is used to determine a target transmission power for a terminal device to send a target signal to a second network device, and the downlink path loss estimation result is determined by a path loss compensation factor configured by the first network device and / or a downlink path loss estimation value measured by the terminal device based on a downlink reference signal of the first network device. The transceiver unit is configured to send the target information to the terminal device.

[0039] Combined with at least one of the third aspect to the fourth aspect, in a possible implementation, the correction parameter includes a first correction parameter, and the downlink path loss correction result satisfies the following formula:

[0040] P X = α × (PL + PL offset )

[0041] where P X is the downlink path loss correction result, α is the path loss compensation factor, PL is the downlink path loss estimation value, and PL offset is the first correction parameter.

[0042] Combined with at least one of the third aspect to the fourth aspect, in a possible implementation manner, the correction parameter includes a first correction parameter, and the downlink path loss correction result satisfies the following formula:

[0043] P X = PL + PL offset

[0044] Wherein, P X is the downlink path loss correction result, PL is the downlink path loss estimated value, and PL offset is the first correction parameter.

[0045] Combined with at least one of the third aspect to the fourth aspect, in a possible implementation manner, the second network device is a single uplink device and the first network device and the second network device do not perform joint reception, or, the second network device is a single uplink device, the terminal device only performs uplink communication with the second network device, and the signal reception quality of the second network device is higher than that of the first network device, and the value of PL offset is less than 0.

[0046] Combined with at least one of the third aspect to the fourth aspect, in a possible implementation manner, the second network device is a single uplink device, the first network device and the second network device perform joint reception, and the propagation loss between the terminal device and the first network device is less than the transmission loss between the terminal device and the second network device, or, the second network device is a single uplink device and the terminal device simultaneously performs uplink communication with the first network device and the second network device, and the value of PL offset is greater than 0.

[0047] Combined with at least one of the third aspect to the fourth aspect, in a possible implementation manner, the second network device is not a single uplink device, or, the second network device and the first network device are the same device, or, the second network device is a single uplink device, the terminal device only performs uplink communication with the first network device, and the signal reception quality of the first network device is higher than that of the second network device, and the value of PL offset is 0.

[0048] Combined with at least one of the third aspect to the fourth aspect, in a possible implementation manner, the correction parameter includes a second correction parameter, and the downlink path loss correction result satisfies the following formula:

[0049] P X = α × PL × β PL

[0050] Wherein, PX is the downlink path loss correction result, α is the path loss compensation factor, PL is the downlink path loss estimated value, and β PL is the second correction parameter.

[0051] Combined with at least one of the third aspect to the fourth aspect, in a possible implementation, the correction parameter includes a second correction parameter, and the downlink path loss correction result satisfies the following formula:

[0052] P X = PL × β PL

[0053] where P X is the downlink path loss correction result, PL is the downlink path loss estimated value, and β PL is the second correction parameter.

[0054] Combined with at least one of the third aspect to the fourth aspect, in a possible implementation, the second network device is a single uplink device and the first network device and the second network device do not perform joint reception, or, the second network device is a single uplink device, the terminal device only performs uplink communication with the second network device and the signal reception quality of the second network device is higher than that of the first network device, and β PL has a value greater than 0 and less than 1.

[0055] Combined with at least one of the third aspect to the fourth aspect, in a possible implementation, the second network device is a single uplink device, the first network device and the second network device perform joint reception and the propagation loss between the terminal device and the first network device is less than the transmission loss between the terminal device and the second network device, or, the second network device is a single uplink device and the terminal device simultaneously performs uplink communication with the first network device and the second network device, and β PL has a value greater than 1.

[0056] Combined with at least one of the third aspect to the fourth aspect, in a possible implementation, the second network device is not a single uplink device, or, the second network device and the first network device are the same device, or, the second network device is a single uplink device, the terminal device only performs uplink communication with the first network device and the signal reception quality of the first network device is higher than that of the second network device, and β PL has a value of 1.

[0057] Combined with at least one of the third aspect to the fourth aspect, in a possible implementation manner, the correction parameter includes a first correction parameter and a second correction parameter, and the downlink path loss correction result satisfies the following formula:

[0058] P X = α × PL + PL offset × β PL

[0059] where P X is the downlink path loss correction result, α is the path loss compensation factor, PL is the downlink path loss estimation value, and PL offset is the first correction parameter, and β PL is the second correction parameter.

[0060] Combined with at least one of the third aspect to the fourth aspect, in a possible implementation manner, the correction parameter includes a first correction parameter and a second correction parameter, and the downlink path loss correction result satisfies the following formula:

[0061] P X = PL + PL offset × β PL

[0062] where P X is the downlink path loss correction result, PL is the downlink path loss estimation value, and PL offset is the first correction parameter, and β PL is the second correction parameter.

[0063] Combined with at least one of the third aspect to the fourth aspect, in a possible implementation manner, the second network device is a single uplink device and the first network device and the second network device do not perform joint reception, or the second network device is a single uplink device, the terminal device only performs uplink communication with the second network device, and the signal reception quality of the second network device is higher than that of the first network device. The value of β PL is greater than 0 and less than 1, and the value of PL offset is less than 0.

[0064] Combined with at least one of the third aspect to the fourth aspect, in a possible implementation manner, the second network device is a single uplink device, the first network device and the second network device perform joint reception, and the propagation loss between the terminal device and the first network device is less than the transmission loss between the terminal device and the second network device, or the second network device is a single uplink device and the terminal device simultaneously performs uplink communication with the first network device and the second network device. β PLThe value of offset is greater than 1, PL

[0065] Combined with at least one of the third aspect to the fourth aspect, in a possible implementation, the second network device is a non-single uplink device, or the second network device and the first network device are the same device, or the second network device is a single uplink device, the terminal device only performs uplink communication with the first network device, and the signal reception quality of the first network device is higher than that of the second network device, β PL The value of offset is 1, PL

[0066] Combined with at least one of the third aspect to the fourth aspect, in a possible implementation, the correction parameter is determined by the path loss difference between the terminal device to the first network device and the terminal device to the second network device, and / or the path loss ratio between the terminal device to the first network device and the terminal device to the second network device.

[0067] Fifth aspect, the present application provides a computer program product, which includes instructions. When the instructions run on a computer, the computer is enabled to execute the method in the first aspect or any possible implementation of the first aspect, or execute the method in the second aspect or any possible implementation of the second aspect.

[0068] Sixth aspect, the present application provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed, it is used to execute the method in the first aspect or any possible implementation of the first aspect, or execute the method in the second aspect or any possible implementation of the second aspect.

[0069] Seventh aspect, the present application provides a communication device, at least one processor and a memory. The memory is used to store a computer program. The processor is used to execute the computer program stored in the memory, so that the communication device executes the method in the first aspect or any possible implementation of the first aspect, or executes the method in the second aspect or any possible implementation of the second aspect.

[0070] Eighth aspect, an embodiment of the present application provides a chip, including a processor and an interface. The input / output interface is used for information or data interaction, and the processing circuit is used to run instructions, so that the device installed with the chip executes the method in the first aspect or any possible implementation of the first aspect, or executes the method in the second aspect or any possible implementation of the second aspect.

[0071] In a ninth aspect, the present application provides a chip system, which includes a processor for supporting a device installed with the chip system to implement the method in the first aspect or any possible implementation manner of the first aspect, or to implement the method in the second aspect or any possible implementation manner of the second aspect. For example, generating or processing data and / or information involved in the above methods. In a possible design, the chip system further includes a memory for storing necessary program instructions and data of the data sending device. The chip system may be composed of chips or may include chips and other discrete devices.

[0072] In a tenth aspect, the present application provides a communication system, which includes a terminal device having functions to implement the methods in the first aspect and various possible designs, and multiple network devices having functions to implement the methods in the second aspect and various possible designs.

[0073] In the communication method provided by the present application, the terminal device may correct the downlink path loss estimation result based on the correction parameters provided by the first network device to obtain a downlink path loss correction result, and further determine a more reasonable target transmit power based on the downlink path loss correction result. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] Figure 1 is a schematic structural diagram of a communication system provided by the present application;

[0075] Figure 2 is a schematic flowchart of a communication method provided by the present application;

[0076] Figure 3 is a schematic structural diagram of a communication device provided by the present application;

[0077] Figure 4 is a schematic structural diagram of another communication device provided by the present application;

[0078] Figure 5 is a schematic structural diagram of another communication device provided by the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0079] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings provided in the embodiments of the present application.

[0080] In various embodiments of the present application, if there is no special description and logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0081] In this application, "at least one" means one or more, and "a plurality of" means two or more. "And / or" describes the relationship between associated objects and indicates that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. In the text description of this application, the character " / " generally represents an "or" relationship between the associated objects before and after; in the formulas of this application, the character " / " represents a "division" relationship between the associated objects before and after. "Including at least one of A, B, and C" can represent: including A; including B; including C; including A and B; including A and C; including B and C; including A, B, and C.

[0082] It can be understood that the various numerical numbers involved in the embodiments of this application are only for the convenience of description and are not used to limit the scope of the embodiments of this application. The magnitudes of the serial numbers of the above processes do not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic.

[0083] The technical solutions of the embodiments of this application can be applied to various communication systems, such as: Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication systems, 5th generation (5G) systems, or New Radio (NR). In addition, it can also be applicable to subsequent evolved systems, such as 6th generation 6G communication systems, or even more advanced 7th generation 7G communication systems, etc.

[0084] The network device in the embodiments of the present application can be a device for communicating with a terminal device, which can be a base station, or an access point, or a network device, or can refer to a device in the access network that communicates with a wireless terminal through one or more sectors over the air interface. The network device can be used to mutually convert the received air frame and the IP packet, and act as a router between the wireless terminal and the rest of the access network, where the rest of the access network can include an Internet Protocol (IP) network. The network device can also coordinate the attribute management of the air interface. For example, the network device can be an evolved NodeB (eNB or eNodeB) in the LTE system, and can also be a radio controller in the cloud radio access network (CRAN) scenario, or the access device can be a relay station, an access point, a vehicle-mounted device, a wearable device, and an access device in a 5G network or a network device in a future evolved PLMN network, etc. It can be an access point (AP) in a WLAN, or a gNB in a new radio (NR) system. The embodiments of the present application do not limit this. It should be noted that for a 5G system, under one base station, there may be one or more transmission reception points (TRP), and all TRPs belong to the same macro cell, which is managed by this base station. Among them, each TRP and the terminal device can use the communication method of the embodiments of the present application.

[0085] In addition, in the embodiments of the present application, the network device can be a device in the radio access network (RAN), or rather, a RAN node that connects the terminal device to the wireless network. For example, by way of example and not limitation, as a network device, the following can be enumerated: gNB, TRP, evolved Node B (eNB), radio network controller (RNC), Node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), base band unit (BBU), or wireless fidelity (Wifi) access point (AP), etc.

[0086] The network device provides services for a cell, and the terminal device communicates with the network device through the transmission resources used by the cell (for example, frequency-domain resources, or in other words, spectrum resources). The cell can be the cell corresponding to the network device (such as a base station). The cell can belong to a macro base station or a base station corresponding to a small cell. Here, the small cell can include: metro cell, micro cell, pico cell, femto cell, etc. These small cells have the characteristics of small coverage range and low transmission power, and are suitable for providing high-rate data transmission services.

[0087] The terminal device in the embodiments of this application can also be referred to as: user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal, user unit, user station, mobile station, mobile platform, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

[0088] A terminal device can be a device that provides voice / data connectivity to users. For example, it can be a handheld device, a vehicle-mounted device, etc. with wireless connection capabilities. Currently, some examples of terminals are: mobile phones, tablet computers, laptop computers, palm computers, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices, or other processing devices connected to a wireless modem, vehicle-mounted devices, wearable devices, terminal devices in a 5G network, or terminal devices in a future evolved public land mobile network (PLMN). The embodiments of this application are not limited thereto.

[0089] By way of example and not limitation, in the embodiments of this application, a wearable device can also be referred to as a wearable intelligent device, which is a general term for devices developed by applying wearable technologies to the intelligent design of daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is either directly worn on the body or integrated into the user's clothing or accessories. A wearable device is not just a hardware device, but more importantly, it realizes powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable intelligent devices include those with complete functions and large sizes that can achieve complete or partial functions without relying on a smartphone, such as smart watches or smart glasses, etc., and those that only focus on a certain type of application function and need to cooperate with other devices such as smartphones, such as various smart bracelets and smart jewelry for physical sign monitoring.

[0090] In addition, in the embodiments of the present application, the terminal device may also be a terminal device in an Internet of Things (IoT) system. The IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network of human-machine interconnection and object-object interconnection.

[0091] In the embodiments of the present application, the terminal device may also include a relay. Or it can be understood that anything capable of communicating data with the base station can be regarded as a terminal device.

[0092] Please refer to Figure 1 , Figure 1 the schematic structural diagram of a communication system provided by the present application. As Figure 1 shown, multiple network devices (network device 110, network device 120, and network device 130) and multiple terminal devices (terminal device 140, terminal device 150, and terminal device 160) form a communication system.

[0093] Optionally, multiple network devices can serve a terminal device simultaneously. For example, network device 110, network device 120, and network device 130 simultaneously serve terminal device 150. Any two of network device 110, network device 120, and network device 130 can exchange data / information. This communication method is the multi-station cooperation method.

[0094] Figure 1 The network device in [[ ]] can be a base station. Among them, the network device corresponds to different devices in different systems. For example, in a 4G system, it can correspond to an eNB, and in a 5G system, it corresponds to the network device in 5G, such as a gNB. The technical solution provided by the present application can also be applied to future mobile communication systems. Therefore Figure 1 the network device in [[ ]] can also correspond to the network device in a future mobile communication system. Figure 1 Taking the network device as a base station as an example, actually referring to the previous introduction, the network device can also be a device such as an RSU.

[0095] It should be understood that Figure 1 the communication system shown in [[ ]] may also include more network nodes, such as other terminal devices or network devices. Figure 1 The network devices or terminal devices included in the communication system shown in [[ ]] can be network devices or terminal devices in the above various forms. The embodiments of the present application are not shown one by one in the figure. Similarly, the communication system architecture applicable to the embodiments of the present application described above is only an example. The communication system architecture applicable to the embodiments of the present application is not limited to this. Any communication system architecture capable of realizing the functions of the above-mentioned various devices is also applicable to the embodiments of the present application.

[0096] In the prior art, in the scenario of dense deployment of single uplink TRPs, the terminal device adjusts the transmission power of the uplink signal based on the path loss measured from the downlink reference signal of the network device associated with the single uplink TRP. Since the path loss between the terminal device and the single uplink TRP is often different from the path loss between the terminal device and the network device associated with the single uplink TRP, using the above method is likely to cause the adjusted transmission power to be too high or too low, thereby making the interference in the communication system more serious and affecting the communication quality.

[0097] Therefore, the technical problem to be solved by this application is: how to reasonably determine the uplink transmission power for a single uplink TRP.

[0098] To solve the above technical problem, this application provides a communication method. In this communication method, the first network device configures a correction parameter for the terminal device. The terminal device can correct the estimated result of the downlink path loss between the second network device and the terminal device it obtains by combining this correction parameter, so as to obtain a downlink path loss correction result that is more matched with the actual downlink path loss between the second network device and the terminal device, and further calculate the target transmission power for sending a target signal to the second network device based on this downlink path loss correction result. In this communication method, since the estimated result of the downlink path loss is corrected by combining the correction parameter configured by the first network device, the target transmission power finally obtained by the terminal device is more reasonable and can more effectively compensate for the influence brought by path loss and shadow fading. By using this method to determine the uplink transmission power for a single uplink TRP, the problem that the determined transmission power in the existing solution may be too high or too low can be solved, and the transmission quality of the uplink link between the terminal device and the single uplink TRP can be ensured.

[0099] Please refer to Figure 2 , Figure 2 which is a schematic flowchart of a communication method provided by this application. As Figure 2 shown, the communication method provided by this application may include the following steps:

[0100] S201, the first network device determines target information for indicating a correction parameter.

[0101] In some feasible implementation manners, the first network device can determine a correction parameter for the terminal device to determine the target transmission power, and generate target information for indicating this correction parameter. Wherein, the above target transmission power is the transmission power for the terminal device to send a target signal to the second network device. It should be understood that in the embodiments of this application, the second network device may be one or more, and the second network device may also include the first network device.

[0102] In a specific implementation, the first network device may first determine the path loss difference and / or path loss ratio between the terminal device and the first network device and between the terminal device and the second network device, and determine the above-mentioned correction parameter according to the path loss difference and / or path loss ratio. Then, the first network device may generate target information that can be used to indicate the correction parameter.

[0103] In a first optional implementation manner, the above-mentioned correction parameter may specifically include a first correction parameter.

[0104] In this case, the first network device may determine the path loss difference between the terminal device and the first network device and between the terminal device and the second network device based on prior information. The prior information at least includes the location information of the terminal device, the first network device, and the second network device. Exemplarily, the first network device may calculate the first path loss value between the first network device and the terminal device based on the location information of the first network device and the terminal device. The first network device may also calculate the second path loss value between the second network device and the terminal device based on the location information of the second network device and the terminal device, and determine the difference between the first path loss value and the second path loss value as the above-mentioned path loss difference. Further, the first network device may determine the obtained path loss difference as the above-mentioned first correction parameter.

[0105] In the above implementation, determining the first correction parameter through the location information of the terminal device, the first network device, and the second network device is simple and easy to implement.

[0106] Alternatively, the first network device may also determine the path loss difference between the terminal device and the first network device and between the terminal device and the second network device based on the measurement result of the uplink reference signal. Exemplarily, the terminal device sends a sounding reference signal (SRS). The first network device may receive the SRS and measure the first reference signal level. The second network device may also receive the SRS and measure the second reference signal level. The first network device may obtain the above-mentioned second reference signal level, and determine the difference between the first reference signal level and the second reference signal level as the above-mentioned path loss difference. Further, the first network device may determine the obtained path loss difference as the above-mentioned first correction parameter.

[0107] In the above implementation, determining the first correction parameter through the measurement result of the uplink reference signal is simple and can ensure that the determined second correction parameter is reasonable and reliable.

[0108] Optionally, the second network device is a single uplink device and the first network device and the second network device do not perform joint reception. Or, the second network device is a single uplink device, the terminal device only performs uplink communication with the second network device, and the signal reception quality of the second network device is higher than that of the first network device. In these cases, the value of the first correction parameter (hereinafter referred to as PL offset for short) is less than 0.

[0109] Optionally, the second network device is a single uplink device, the first network device and the second network device perform joint reception, and the propagation loss between the terminal device and the first network device is less than the transmission loss between the terminal device and the second network device. Or, the second network device is a single uplink device and the terminal device simultaneously performs uplink communication with the first network device and the second network device. In these cases, the value of PL offset is greater than 0.

[0110] Optionally, the second network device is not a single uplink device, or the second network device and the first network device are the same device, or the second network device is a single uplink device, the terminal device only performs uplink communication with the first network device, and the signal reception quality of the first network device is higher than that of the second network device. In these cases, the value of PL offset is 0.

[0111] In other words, in a scenario without single uplink TRP deployment, either the target signal is sent to the first network device, or the terminal device only performs uplink communication with the first network device with better signal reception quality. The terminal device can adjust the uplink transmit power using the existing solution. Therefore, the value of PL offset can be 0. In a general scenario with single uplink TRP deployment (here the second network device is a single uplink TRP, the first network device is its associated network device, also known as a macro station, and the first network device can be used for the terminal device to perform downlink reception), and the network device does not perform joint reception with the single uplink TRP. Or, when the terminal device only performs uplink communication with the second network device with better signal reception quality, since the main function of the single uplink TRP is to complement the uplink coverage, the path loss of the terminal device facing the single uplink TRP is often less than the path loss facing the macro station. Therefore, the value of PL offset can be less than 0, so as to achieve a better compromise between facing the macro station and facing the single uplink TRP. In a scenario with single uplink TRP deployment, when the single uplink TRP and the macro station perform joint reception, and the terminal is closer to the macro station, the path loss of the terminal device facing the single uplink TRP is greater than the path loss facing the macro station. Or, when the second network device is a single uplink device and the terminal device simultaneously performs uplink communication with the first network device and the second network device, the value of PL offsetThe value can be greater than 0, so as to achieve a better compromise between the macro station and the single uplink TRP. In short, the solution provided by this application can adapt to different communication scenarios by adjusting the value range of PL offset to achieve high flexibility.

[0112] It should be understood that the value conditions of the aforementioned PL offset are only exemplary. In actual implementation, under other possible value conditions, PL offset can also adopt the value range described above, and this application does not limit this.

[0113] Optionally, in actual implementation, the first network device can perform bit quantization on the value of PL offset to obtain the quantized PL offset , and further indicate the quantized PL offset through the target information. Exemplarily, the value interval range of the quantized PL offset can be [-226, 226], the step size is 2, and the unit is dB.

[0114] Alternatively, after obtaining the quantized PL offset , the first network device can also perform interval mapping on the value of the quantized PL offset , and indicate the value of the mapped PL offset through the target information. For example, assuming that the value range of the quantized PL offset is [-226, 226], the first network device can map the value of the quantized PL offset to [-113, 113] to obtain the mapped PL offset . Among them, the step size of the mapped PL offset can be 1, and the unit is dB.

[0115] In the second alternative implementation manner, the above correction parameter may specifically include a second correction parameter.

[0116] In this case, the first network device may determine the path loss ratio between the terminal device and the first network device and between the terminal device and the second network device based on prior information. The prior information includes at least the location information of the terminal device, the first network device, and the second network device. Exemplarily, the first network device may calculate the first path loss value between the first network device and the terminal device based on the location information of the first network device and the terminal device. The first network device may also calculate the second path loss value between the second network device and the terminal device based on the location information of the second network device and the terminal device, and determine the ratio of the first path loss value to the second path loss value as the above-mentioned path loss ratio. Further, the first network device may determine the obtained path loss ratio as the above-mentioned second correction parameter.

[0117] In the above implementation, the second correction parameter is determined based on the location information of the terminal device, the first network device, and the second network device, and the method is simple and easy to implement.

[0118] Alternatively, the first network device may also determine the path loss ratio between the terminal device and the first network device and between the terminal device and the second network device based on the measurement result of the uplink reference signal. Exemplarily, the terminal device may send a sounding reference signal (SRS). The first network device may receive the SRS and measure the first reference signal level. The second network device may also receive the SRS and measure the second reference signal level. The first network device may obtain the above-mentioned second reference signal level, and determine the ratio of the first reference signal level to the second reference signal level as the above-mentioned path loss ratio. Further, the first network device may determine the obtained path loss ratio as the above-mentioned second correction parameter.

[0119] In the above implementation, the second correction parameter is determined based on the measurement result of the uplink reference signal, and the method is simple and can ensure that the determined second correction parameter is reasonable and reliable.

[0120] Optionally, the second network device is a single uplink device and the first network device and the second network device do not perform joint reception, or the second network device is a single uplink device, the terminal device only performs uplink communication with the second network device, and the signal reception quality of the second network device is higher than that of the first network device. In these cases, the value of the second correction parameter (hereinafter referred to as β PL for representation) is greater than 0

[0121] Optionally, the second network device is a single uplink device, the first network device and the second network device perform joint reception, and the propagation loss between the terminal device and the first network device is less than the transmission loss between the terminal device and the second network device. Alternatively, the second network device is a single uplink device and the terminal device performs uplink communication with the first network device and the second network device simultaneously. In these cases, β PL has a value greater than 1.

[0122] Optionally, the second network device is not a single uplink device, or the second network device and the first network device are the same device, or the second network device is a single uplink device, the terminal device only performs uplink communication with the first network device, and the signal reception quality of the first network device is higher than that of the second network device. In these cases, β PL has a value equal to 1.

[0123] In other words, in the scenario without single uplink TRP deployment, either the target signal is sent to the first network device, or the terminal device only performs uplink communication with the first network device with better signal reception quality. The terminal device can adjust the uplink transmission power using the existing solution. Therefore, β PL has a value equal to 1. In the general scenario with single uplink TRP deployment (here the second network device is a single uplink TRP, the first network device is its associated network device, also known as a macro station, and the first network device can be used for the terminal device to receive the downlink), and the network device does not perform joint reception with the single uplink TRP, or when the terminal device only performs uplink communication with the second network device with better signal reception quality, since the main function of the single uplink TRP is to complement the uplink coverage, the path loss of the terminal device facing the single uplink TRP is often less than the path loss facing the macro station. β PL has a value greater than 0 and less than 1, so as to achieve a better compromise between facing the macro station and facing the single uplink TRP. In the scenario with single uplink TRP deployment, when the single uplink TRP and the macro station perform joint reception and the terminal is closer to the macro station, the path loss of the terminal device facing the single uplink TRP is greater than the path loss facing the macro station. Alternatively, when the second network device is a single uplink device and the terminal device performs uplink communication with the first network device and the second network device simultaneously, β PL has a value greater than 1, so as to achieve a better compromise between facing the macro station and facing the single uplink TRP. In short, the solution provided in this application can adapt to different communication scenarios by adjusting the value range of β PL , with high flexibility.

[0124] It should be understood that the value conditions of β PL described above are only exemplary. In actual implementation, under other possible value conditions, β PLThe value range described above may also be adopted, and the present application does not limit this.

[0125] Optionally, in actual implementation, the first network device may perform bit quantization on the value of β PL to obtain the quantized β PL , and indicate the quantized β through the target information PL . Exemplarily, the value range of the quantized β PL can be [0, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1] ° [1, 2, 3, 4, 5, 6, 7, 8, 9, 10], where "[a] ° [b]" represents the Cartesian product of a and b. Or rather, in actual implementation, the value range of β PL can be between (0, 10], and bit quantization is performed according to certain rules.

[0126] In the third optional implementation manner, the above-mentioned correction parameters may specifically include the above-mentioned first correction parameter and the above-mentioned second correction parameter. In this case, for the specific processes of the first network device to determine the first correction parameter and the second correction parameter and the value descriptions for the first correction parameter and the second correction parameter, reference may be made to the corresponding processes described above, and details will not be elaborated here.

[0127] It should be understood that the process of the first network device determining the correction parameter described above is only exemplary. In actual implementation, the first network device may also adopt other methods to determine the correction parameter, and the present application does not specifically limit this.

[0128] S202. The first network device sends the target information to the terminal device. Correspondingly, the terminal device receives the target information.

[0129] In some feasible implementation manners, after determining the above-mentioned target information, the first network device can generate a message containing the target information and send the message to the terminal device. Correspondingly, the terminal device can receive the message from the first network device, extract the above-mentioned target information from the message, and determine the above-mentioned correction parameter based on the target information.

[0130] Optionally, the above-mentioned target information may be transmitted between the first network device and the terminal device through RRC messages, DCI messages, etc. The present application does not limit the specific manner of transmitting the target information between the first network device and the terminal device.

[0131] S203. The terminal device determines the target transmission power for sending the target signal to the second network device.

[0132] In some feasible implementation manners, after obtaining the above correction parameter, the terminal device may correct the path loss estimation result between the second network device and the terminal device obtained thereby to obtain a downlink path loss correction result. The terminal device may determine a target transmission power for sending a target signal to the second network device based on the downlink path loss correction result. Among them, the above path loss estimation result may be determined by the terminal device according to the path loss compensation factor configured (or sent down) by the first network device, and / or the downlink path loss estimation value measured by the terminal device based on the downlink reference signal of the first network device.

[0133] It should be understood that the path loss compensation factor (here assumed to be α) is usually configured by the first network device through a Radio Resource Control (RRC) message. Exemplarily, its pseudo code may be: Alpha::=ENUMERATED{alpha0, alpha04, alpha05, alpha06, alpha07, alpha08, alpha09, alpha1}, where Alpha is the RRC variable name, and ENUMERATED represents the quantization value of the path loss compensation factor α.

[0134] The downlink path loss estimation value (here assumed to be PL) is usually the downlink path loss estimation value calculated by the terminal device based on the index value of the downlink reference signal of the first network device, and this downlink path loss estimation value will be used as the path loss compensation value for uplink power control. Here, the downlink reference signal of the first network device may include a synchronization signal and a PBCH block (i.e., SS / PBCH block) or a channel state information-reference signal (CSI-RS) resource. Here, the downlink path loss estimation value PL satisfies the following relationship: PL = referenceSignalPower - higher layer filtered RSRP. Wherein, referenceSignalPower represents the transmission power of the downlink reference signal configured by the high-layer signaling, and higher layer filtered RSRP represents the received power of the downlink reference signal received by the terminal device after high-layer filtering.

[0135] Next, the specific process of the terminal device determining the target transmission power will be described respectively in combination with three cases where the correction parameter described above includes a first correction parameter, the correction parameter includes a second correction parameter, and the correction parameter includes a first correction parameter and a second correction parameter.

[0136] Case 1: The correction parameter includes a first correction parameter

[0137] In this case, the terminal device can first determine the above-mentioned downlink path loss correction result based on the first correction parameter.

[0138] In the first alternative implementation, the downlink path loss correction result satisfies the following formula:

[0139] P X = α × (PL + PL offset ) (1)

[0140] where P x is the downlink path loss correction result, α is the path loss compensation factor, PL is the downlink path loss estimated value, and PL offset is the first correction parameter. In this case, α × PL can be understood as the downlink path loss estimation result described above. That is to say, the terminal device can calculate the downlink path loss correction result based on formula (1).

[0141] In the second alternative implementation, the downlink path loss correction result satisfies the following formula:

[0142] P X = PL + PL offset (2)

[0143] where P X is the downlink path loss correction result, PL is the downlink path loss estimated value, and PL offset is the first correction parameter. In this case, PL can be understood as the downlink path loss estimation result described above.

[0144] Case 2: The correction parameter includes a second correction parameter

[0145] In this case, the terminal device can first determine the above-mentioned downlink path loss correction result based on the second correction parameter.

[0146] In the first alternative implementation, the downlink path loss correction result satisfies the following formula:

[0147] P X = α × PL × β PL (3)

[0148] where P X is the downlink path loss correction result, α is the path loss compensation factor, PL is the downlink path loss estimated value, and β Pl is the second correction parameter. In this case, α × PL can be understood as the downlink path loss estimation result described above.

[0149] In the second alternative implementation, the downlink path loss correction result satisfies the following formula:

[0150] P X = PL × β PL (4)

[0151] where P X is the downlink path loss correction result, PL is the downlink path loss estimated value, and β PL is the second correction parameter. In this case, PL can be understood as the downlink path loss estimation result described above.

[0152] Case 3: The correction parameter includes a first correction parameter and a second correction parameter

[0153] In this case, the terminal device can first determine the above-mentioned downlink path loss correction result based on the first correction parameter and the second correction parameter.

[0154] In the first alternative implementation, the downlink path loss correction result satisfies the following formula:

[0155] P X = α × PL + PL offset × β PL (5)

[0156] where P X is the downlink path loss correction result, α is the path loss compensation factor, PL is the downlink path loss estimated value, PL offset is the first correction parameter, and β PL is the second correction parameter. In this case, α × PL can be understood as the downlink path loss estimation result described above.

[0157] In the second alternative implementation, the downlink path loss correction result satisfies the following formula:

[0158] P X = PL + PL offset × β PL (6)

[0159] where P X is the downlink path loss correction result, PL is the downlink path loss estimated value, PL offset is the first correction parameter, and β PL is the second correction parameter. In this case, PL can be understood as the downlink path loss estimation result described above.

[0160] Furthermore, the terminal device can determine the target transmit power for sending the target signal to the second network device based on the calculated downlink path loss correction result.

[0161] In the first alternative implementation, the above target signal may include the SRS.

[0162] In this case, the terminal device may combine the downlink path loss correction result P through the following formula X to calculate the above target transmit power.

[0163]

[0164] where P SRS,b,f,c (i, q s , l) is the target transmit power. It should be understood that here, taking the terminal device sending SRS in the serving cell c, carrier f, and the ID of the uplink active bandwidth part (BWP) being b as an example, the same applies hereinafter.

[0165] P CMAX,f,c (i) is the maximum output power configured for the terminal device when in the serving cell c, carrier f, and the SRS transmission timing is i. This maximum output power is related to the transmission capability of the terminal device.

[0166] P O_SRS,b,f,c (q s ) is the target received power value of the SRS in the serving cell c, carrier f, and the ID of the BWP being b. q s is the ID of the SRS resource set.

[0167] M SRS,b,f,c (i) is the number of resource blocks (RBs) occupied by the SRS in the serving cell c, carrier f, BWP ID b, and transmission timing i.

[0168] μ is the value corresponding to the subcarrier spacing (SCS) configuration.

[0169] P X is the downlink path loss correction result calculated through the above formula (1), formula (3), or formula (5).

[0170] In the second alternative implementation, the above target signal may include the signal transmitted through the physical uplink shared channel (PUSCH).

[0171] In this case, the terminal device may combine the downlink path loss correction result P through the following formula X to calculate the above target transmit power.

[0172]

[0173] Among them, P PUSCH,b,f,c (i, j, q d , l) is the target transmission power. It should be understood that here, it is taken as an example that the terminal device sends a target signal on the serving cell c, carrier f, and BWP ID b. The same applies hereinafter. Among them, j is the parameter set configuration index (i.e., parameter set configuration). When j = 0, the uplink grant configuration (i.e., ConfiguredGrantConfig) represents the uplink power control of the PUSCH carrying msg3 (4-step RA) or msgA (2-step RA). When j = 1, ConfiguredGrantConfig represents the uplink power control of the PUSCH during configured scheduling. In addition, when the value of j is greater than or equal to 2, ConfiguredGrantConfig represents the power control under normal circumstances.

[0174] P CMAX,f,c (i) is the maximum output power configured for the terminal device when the serving cell is c, the carrier is f, and the transmission opportunity of the target signal is i. This maximum output power is related to the transmission capability of the terminal device.

[0175] P O_PUSCH,b,f,c (j) is the target reception power value of the target signal on the serving cell c, carrier f, and BWP ID b.

[0176] is the number of resource blocks (RBs) occupied by the target signal with the serving cell c, carrier f, BWP ID b, and transmission opportunity i.

[0177] μ is the value corresponding to the subcarrier spacing (SCS) configuration.

[0178] P X is the downlink path loss correction result calculated through the above formula (1), formula (3), or formula (5).

[0179] f b,f,c (i, l) is a closed-loop control parameter, which is the dynamic power adjustment amount indicated by the first network device through downlink control information (DCI).

[0180] Δ TF,b,f,c (i) represents the PUSCH transmission power adjustment amount, and its value is related to the format of the PUSCH.

[0181] In a third alternative implementation, the above-mentioned target signal may include a signal transmitted through a physical uplink control channel (PUCCH).

[0182] In this case, the terminal device can combine the downlink path loss correction result P through the following formula X to calculate the above-mentioned target transmit power.

[0183]

[0184] where P PUCCH,b,f,c (i, q u , q d , l) is the target transmit power. It should be understood that here, it is an example where the terminal device sends a target signal on the serving cell c, carrier f, and BWP ID b. The same applies hereinafter. Among them, j is the parameter set configuration index (i.e., parameter set configuration). When j = 0, the uplink grant configuration (i.e., ConfiguredGrantConfig) represents the uplink power control of the PUSCH carrying msg3 (4-step RA) or msgA (2-step RA). When j = 1, ConfiguredGrantConfig represents the uplink power control of the PUSCH during configured scheduling. In addition, when the value of j is greater than or equal to 2, ConfiguredGrantConfig represents the power control under normal circumstances.

[0185] P CMAX,f,c (i) is the maximum output power configured by the terminal device when the serving cell is c, the carrier is f, and the transmission opportunity of the target signal is i. This maximum output power is related to the transmission capability of the terminal device.

[0186] P O_PUCCH,b,f,c (j) is the target received power value of the target signal on the serving cell c, carrier f, and BWP ID b.

[0187] is the number of resource blocks (RBs) occupied by the target signal on the serving cell c, carrier f, BWP ID b, and transmission opportunity i.

[0188] μ is the value corresponding to the subcarrier spacing (SCS) configuration.

[0189] P X is the downlink path loss correction result calculated through the above formula (2), formula (4), or formula (6).

[0190] g b,f,c (i, l) is a closed-loop control parameter, which is the dynamic power adjustment amount indicated by the first network device through DCI.

[0191] Δ F_PUCCH Δ(i) represents the PUCCH transmit power adjustment amount, and its value is related to the format of the PUCCH.

[0192] Furthermore, after the terminal device calculates the above target transmit power through the above formula (7), formula (8), or formula (9), it can send a target signal to the second network device based on the target transmit power.

[0193] It should be noted that the foregoing description of the type of the target signal is only exemplary. In actual implementation, when the target signal is other types of signals other than those described above, the terminal device can also use formula (7), formula (8), or formula (9) to calculate the target transmit power, and this application does not make specific limitations on this.

[0194] In the communication method provided by this application, the terminal device corrects the downlink path loss estimation result in combination with the correction parameters configured by the first network device, which makes the determined target transmit power more reasonable and reliable, and can more effectively compensate for the influence brought by path loss and shadow fading. Using the method provided by this application to determine the uplink transmit power for a single uplink TRP can solve the problem that the determined transmit power in the existing solution may be too high or too low, and can ensure the transmission quality of the uplink link between the terminal device and the single uplink TRP.

[0195] The above is combined with Figures 1 to 2 The method of the embodiment of this application has been described in detail. Next, in combination with Figures 3 to 5 The communication device involved in this application will be described in detail.

[0196] Please refer to Figure 3 , Figure 3 which is a schematic structural diagram of a communication device provided by this application. This communication device can be the terminal device in the foregoing embodiment, or an element or module inside the terminal device.

[0197] The communication device may include one or more transceiver units 301 and one or more processing units 302. The above-mentioned transceiver unit 301 may be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., and may include at least one antenna and a radio frequency circuit. The above-mentioned transceiver unit 301 is mainly used for the transceiver of radio frequency signals and the conversion between radio frequency signals and baseband signals, for example, for receiving indication information from a network device. The above-mentioned processing unit 302 is mainly used for baseband processing and controlling the communication device, etc. The above-mentioned transceiver unit 301 and the processing unit 302 may be physically set together or physically separated, that is, a distributed device. In a specific implementation, the above-mentioned transceiver unit 301 may be composed of one or more single boards. Multiple single boards may jointly support a radio access network of a single access mode, or may separately support radio access networks of different access modes. The above-mentioned processing unit 302 further includes a memory and a processor. The above-mentioned memory is used for storing necessary instructions and data. The above-mentioned processor is used for controlling the communication device to perform necessary operations, for example, for controlling the communication device to execute the relevant operation processes of the terminal device in the first embodiment above. The above-mentioned memory and processor may serve one or more single boards. That is to say, a memory and a processor may be separately set on each single board. It is also possible that multiple single boards share the same memory and processor. In addition, necessary circuits may be provided on each single board. Further, the communication device may further include an input / output device, such as a touch screen, a display screen, a keyboard, etc., which are mainly used for receiving data input by a user using the device and outputting data to the user. It should be noted that in some scenarios, the communication device may not include an input / output device.

[0198] In a specific implementation, the transceiver unit 301 is used for receiving target information from a first network device. Wherein, the target information is used for indicating a correction parameter. The processing unit 302 is used for determining a target transmit power for sending a target signal to a second network device, where the target transmit power is determined based on a downlink path loss correction result, and the downlink path loss correction result is determined by the correction parameter and a downlink path loss estimation result, and the downlink path loss estimation result is determined by a path loss compensation factor configured by the first network device and / or a downlink path loss estimated value measured by the terminal device based on a downlink reference signal of the first network device.

[0199] In a possible implementation manner, the correction parameter includes a first correction parameter, and the downlink path loss correction result satisfies the following formula:

[0200] P X =α×(PL+PL offset )

[0201] Wherein, P Xis the downlink path loss correction result, α is the path loss compensation factor, PL is the downlink path loss estimation value, and PL offset is the first correction parameter.

[0202] In a possible implementation, the correction parameter includes a first correction parameter, and the downlink path loss correction result satisfies the following formula:

[0203] P X = PL + PL offset

[0204] where P X is the downlink path loss correction result, PL is the downlink path loss estimation value, and PL offset is the first correction parameter.

[0205] In a possible implementation, the second network device is a single uplink device and the first network device and the second network device do not perform joint reception, or the second network device is a single uplink device, the terminal device only performs uplink communication with the second network device, and the signal reception quality of the second network device is higher than that of the first network device. The value of PL offset is less than 0.

[0206] In a possible implementation, the second network device is a single uplink device, the first network device and the second network device perform joint reception, and the propagation loss between the terminal device and the first network device is less than the transmission loss between the terminal device and the second network device, or the second network device is a single uplink device and the terminal device simultaneously performs uplink communication with the first network device and the second network device. The value of PL offset is greater than 0.

[0207] In a possible implementation, the second network device is not a single uplink device, or the second network device and the first network device are the same device, or the second network device is a single uplink device, the terminal device only performs uplink communication with the first network device, and the signal reception quality of the first network device is higher than that of the second network device. The value of PL offset is 0.

[0208] In a possible implementation, the correction parameter includes a second correction parameter, and the downlink path loss correction result satisfies the following formula:

[0209] P X = α × PL × β PL

[0210] Among them, P X is the downlink path loss correction result, α is the path loss compensation factor, PL is the downlink path loss estimation value, and β PL is the second correction parameter.

[0211] In a possible implementation, the correction parameter includes a second correction parameter, and the downlink path loss correction result satisfies the following formula:

[0212] P X = PL × β PL

[0213] Among them, P X is the downlink path loss correction result, PL is the downlink path loss estimation value, and β PL is the second correction parameter.

[0214] In a possible implementation, the second network device is a single uplink device and the first network device and the second network device do not perform joint reception, or, the second network device is a single uplink device, the terminal device only performs uplink communication with the second network device and the signal reception quality of the second network device is higher than that of the first network device, β PL has a value greater than 0 and less than 1.

[0215] In a possible implementation, the second network device is a single uplink device, the first network device and the second network device perform joint reception and the propagation loss between the terminal device and the first network device is less than the transmission loss between the terminal device and the second network device, or, the second network device is a single uplink device and the terminal device simultaneously performs uplink communication with the first network device and the second network device, β PL has a value greater than 1.

[0216] In a possible implementation, the second network device is not a single uplink device, or, the second network device and the first network device are the same device, or, the second network device is a single uplink device, the terminal device only performs uplink communication with the first network device and the signal reception quality of the first network device is higher than that of the second network device, β PL has a value of 1.

[0217] In a possible implementation, the correction parameter includes a first correction parameter and a second correction parameter, and the downlink path loss correction result satisfies the following formula:

[0218] P X = α × PL + PL offset × βPL

[0219] Among them, P X is the downlink path loss correction result, α is the path loss compensation factor, PL is the downlink path loss estimated value, and PL offset is the first correction parameter, and β PL is the second correction parameter.

[0220] In a possible implementation, the correction parameter includes a first correction parameter and a second correction parameter, and the downlink path loss correction result satisfies the following formula:

[0221] P X = PL + PL offset ×β PL

[0222] Among them, P x is the downlink path loss correction result, PL is the downlink path loss estimated value, and PL offset is the first correction parameter, and β PL is the second correction parameter.

[0223] Please refer to Figure 4 , Figure 4 which is a schematic structural diagram of another communication device provided by this application. This communication device can be used to perform the functions of the first network device in the above embodiments. This communication device can be the first network device itself, or an element or module inside the first network device. For the sake of convenience of description, Figure 4 only the main components of this communication device are shown. As can be seen from Figure 4 , this communication device includes modules such as a processor, a memory, a radio frequency unit, and an antenna. The processor is mainly used to process communication protocols and communication data, control the communication device, execute software programs, and process data of software programs. The memory is mainly used to store software programs and data. The radio frequency unit is mainly used for the conversion between baseband signals and radio frequency signals and the processing of radio frequency signals. The antenna is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves.

[0224] When data needs to be sent, the processor performs baseband processing on the data to be sent, and then outputs a baseband signal to the radio frequency unit. The radio frequency unit performs radio frequency processing on the baseband signal and then sends the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the communication device, the radio frequency unit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data. For the sake of convenience of description, Figure 4Only one memory and one processor are shown. In an actual device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be provided independently of the processor or integrated with the processor. The embodiments of the present application do not limit this.

[0225] In the embodiments of the present application, an antenna and a radio frequency unit with transceiver functions may be regarded as the transceiver unit of a communication device, and a processor with processing functions may be regarded as the processing unit of the communication device. As Figure 4 shown, the communication device includes a transceiver unit 401 and a processing unit 402. Optionally, devices for implementing the receiving function in the transceiver unit 401 may be regarded as the receiving unit, and devices for implementing the sending function in the transceiver unit 401 may be regarded as the sending unit, that is, the transceiver unit 401 includes a receiving unit and a sending unit. Here, the receiving unit may sometimes also be referred to as a receiver, a receptor, or a receiving circuit, etc. The sending unit may sometimes also be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0226] In a specific implementation, the processing unit 402 is used to determine target information for indicating a correction parameter. Wherein, the correction parameter and the downlink path loss estimation result are used to determine the downlink path loss correction result, and the downlink path loss correction result is used to determine the target transmission power for the terminal device to send a target signal to a second network device. The downlink path loss estimation result is determined by a path loss compensation factor configured by the first network device and / or a downlink path loss estimation value measured by the terminal device based on the downlink reference signal of the first network device. The transceiver unit 401 is used to send the target information to the terminal device.

[0227] In a possible implementation manner, the correction parameter includes a first correction parameter, and the downlink path loss correction result satisfies the following formula:

[0228] P X =α×(PL + PL offset )

[0229] Wherein, P X is the downlink path loss correction result, α is the path loss compensation factor, PL is the downlink path loss estimation value, and PL odfset is the first correction parameter.

[0230] In a possible implementation manner, the correction parameter includes a first correction parameter, and the downlink path loss correction result satisfies the following formula:

[0231] P X =PL + PL offset

[0232] wherein, P X is the downlink path loss correction result, PL is the downlink path loss estimated value, and PL offset is the first correction parameter.

[0233] In a possible implementation, the second network device is a single uplink device and the first network device and the second network device do not perform joint reception, or, the second network device is a single uplink device, the terminal device only performs uplink communication with the second network device, and the signal reception quality of the second network device is higher than that of the first network device, then the value of PL offset is less than 0.

[0234] In a possible implementation, the second network device is a single uplink device, the first network device and the second network device perform joint reception, and the propagation loss between the terminal device and the first network device is less than the transmission loss between the terminal device and the second network device, or, the second network device is a single uplink device and the terminal device simultaneously performs uplink communication with the first network device and the second network device, then the value of PL offset is greater than 0.

[0235] In a possible implementation, the second network device is not a single uplink device, or, the second network device and the first network device are the same device, or, the second network device is a single uplink device, the terminal device only performs uplink communication with the first network device, and the signal reception quality of the first network device is higher than that of the second network device, then the value of PL offset is 0.

[0236] In a possible implementation, the correction parameter includes a second correction parameter, and the downlink path loss correction result satisfies the following formula:

[0237] P X = α × PL × β PL

[0238] wherein, P X is the downlink path loss correction result, α is the path loss compensation factor, PL is the downlink path loss estimated value, and β PL is the second correction parameter.

[0239] In a possible implementation, the correction parameter includes a second correction parameter, and the downlink path loss correction result satisfies the following formula:

[0240] P X = PL × β PL

[0241] Among them, P X is the downlink path loss correction result, PL is the downlink path loss estimated value, and β PL is the second correction parameter.

[0242] In a possible implementation, the second network device is a single uplink device and the first network device and the second network device do not perform joint reception, or the second network device is a single uplink device, the terminal device only performs uplink communication with the second network device, and the signal reception quality of the second network device is higher than that of the first network device. The value of β PL is greater than 0 and less than 1.

[0243] In a possible implementation, the second network device is a single uplink device, the first network device and the second network device perform joint reception, and the propagation loss between the terminal device and the first network device is less than the transmission loss between the terminal device and the second network device, or the second network device is a single uplink device and the terminal device simultaneously performs uplink communication with the first network device and the second network device. The value of β PL is greater than 1.

[0244] In a possible implementation, the second network device is not a single uplink device, or the second network device and the first network device are the same device, or the second network device is a single uplink device, the terminal device only performs uplink communication with the first network device, and the signal reception quality of the first network device is higher than that of the second network device. The value of β PL is 1.

[0245] In a possible implementation, the correction parameter includes a first correction parameter and a second correction parameter, and the downlink path loss correction result satisfies the following formula:

[0246] P X = α × PL + PL offset × β PL

[0247] Among them, P X is the downlink path loss correction result, α is the path loss compensation factor, PL is the downlink path loss estimated value, PL offset is the first correction parameter, and β PL is the second correction parameter.

[0248] In a possible implementation, the correction parameter includes a first correction parameter and a second correction parameter, and the downlink path loss correction result satisfies the following formula:

[0249] P X = PL + PL offset ×β PL

[0250] Where P X is the downlink path loss correction result, PL is the downlink path loss estimated value, and PL odfset is the first correction parameter, and β PL is the second correction parameter.

[0251] Please refer to Figure 5 , Figure 5 which is a schematic structural diagram of another communication device provided by this application. The communication device 500 can be used to implement the operations performed by the terminal device in the above embodiments, or the communication device 500 can be the terminal device described above. The communication device 500 includes: a processor 501, a memory 502, and a bus system 504.

[0252] The memory 502 includes but is not limited to RAM, ROM, EPROM, or CD-ROM. The memory 502 is used to store relevant instructions and data. The memory 502 stores the following elements, executable modules, or data structures, or subsets thereof, or extended sets thereof:

[0253] Operation instructions: including various operation instructions for implementing various operations.

[0254] Operating system: including various system programs for implementing various basic services and processing hardware-based tasks.

[0255] Figure 5 Only one memory is shown in[[ID=]], and of course, the memory can also be set to multiple according to needs.

[0256] It may further include a transceiver 503. The transceiver 503 can be a communication module or a transceiver circuit. In the embodiments of this application, the transceiver 503 is used to perform operations such as receiving information described in the above embodiments.

[0257] The processor 501 can be a controller, a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The processor 501 can also be a combination for implementing computing functions, such as a combination including one or more microprocessors, a combination of a DSP and a microprocessor, and so on.

[0258] In a specific application, each component of the communication device 500 is coupled together through a bus system 504. In addition to the data bus, the bus system 504 may further include a power bus, a control bus, a status signal bus, etc. However, for the sake of clear illustration, in Figure 5 all kinds of buses are labeled as the bus system 504. For ease of representation, Figure 5 it is only schematically shown in

[0259] In a specific implementation, the communication device 500 may execute the steps of the method performed by the terminal device in the foregoing embodiments. Specifically, when the communication device 500 is used to implement each step performed by the terminal device in the communication method provided in the embodiments, the processor 501 may be used to implement the functions of the foregoing processing unit 302, and the transceiver 503 is used to implement the functions of the foregoing transceiver unit 301.

[0260] Please continue to refer to Figure 5 , the communication device 500 may also be used to implement the operations performed by the first network device in the foregoing embodiments. Or rather, the communication device 500 may also be the first network device described above.

[0261] In a specific implementation, when the communication device 500 is used to implement each step performed by the first network device in the communication method provided in the embodiments, the processor 501 may be used to implement the functions of the foregoing processing unit 402, and the transceiver 503 is used to implement the functions of the foregoing transceiver unit 401.

[0262] It should be noted that in practical applications, the processor in the embodiments of the present application may be an integrated circuit chip with signal processing capabilities. During implementation, the steps of the above method embodiments may be completed by the integrated logic circuit in the hardware of the processor or instructions in software form. The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor. The software module may be located in a mature storage medium in the art such as a random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, register, etc. This storage medium is located in the memory, and the processor reads the information in the memory and combines its hardware to complete the steps of the above method.

[0263] It can be understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, 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 is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and directrambus RAM (DR RAM). It should be noted that the memory described in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

[0264] The present application also provides a communication system, which includes one or more of the first network devices described above and one or more of the terminal devices described above.

[0265] The present application also provides a computer-readable medium, on which a computer program is stored, and when the computer program is executed by a computer, it implements the steps of the communication method performed by the terminal device in the above embodiments.

[0266] The present application also provides a computer program product, and when the computer program product is executed by a computer, it implements the steps of the communication method performed by the network device in the above embodiments.

[0267] The present application also provides a communication device, including a processor and an interface. The processor is configured to implement the steps of the communication method performed by the terminal device or the network device in the foregoing embodiments. It should be understood that the communication device may be a chip, and the foregoing processor may be implemented by hardware or by software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc. When implemented by software, the processor may be a general-purpose processor, which is implemented by reading software code stored in a memory. The memory may be integrated in the processor or may exist independently outside the processor.

[0268] The present application also provides a chip system, which includes a processor for supporting a device installed with the chip system to implement the communication method performed by the foregoing terminal device or network device, such as generating or processing data and / or information involved in the foregoing method. In a possible design, the chip system further includes a memory for storing necessary program instructions and data of the data sending device. The chip system may be composed of chips or may include chips and other discrete devices.

[0269] In the foregoing method embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using 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 the computer instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wirelessly (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium accessible by a computer or a data storage device such as a server or a data center integrating one or more available media. The available medium may be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a high-definition digital video disc (DVD)), or a semiconductor medium (such as a solid state disk (SSD), etc.).

[0270] The above is only a preferred embodiment of the technical solution of this application and is not intended to limit the protection scope of this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

1. A communication method, characterized in that, Applicable to a terminal device, the method includes: Receiving target information from a first network device, where the target information is used to indicate a correction parameter; Determining a target transmit power for sending a target signal to a second network device, where the target transmit power is determined based on a downlink path loss correction result, and the downlink path loss correction result is determined by the correction parameter and a downlink path loss estimation result, and the downlink path loss estimation result is determined by a path loss compensation factor configured by the first network device and / or a downlink path loss estimated value measured by the terminal device based on a downlink reference signal of the first network device.

2. A communication method, characterized in that, Applicable to a first network device, the method includes: Determining target information for indicating a correction parameter, where the correction parameter and a downlink path loss estimation result are used to determine a downlink path loss correction result, and the downlink path loss correction result is used to determine a target transmit power for the terminal device to send a target signal to the second network device, and the downlink path loss estimation result is determined by a path loss compensation factor configured by the first network device and / or a downlink path loss estimated value measured by the terminal device based on a downlink reference signal of the first network device; Sending the target information to the terminal device.

3. The method according to claim 1 or 2, characterized in that, The correction parameter includes a first correction parameter, and the downlink path loss correction result satisfies the following formula: P X = α × (PL + PL offset ) where P X is the downlink path loss correction result, α is the path loss compensation factor, PL is the downlink path loss estimate, and PL offset is the first correction parameter.

4. The method according to claim 1 or 2, characterized in that, The correction parameter includes a first correction parameter, and the downlink path loss correction result satisfies the following formula: P X = PL + PL offset where P X is the downlink path loss correction result, PL is the downlink path loss estimated value, and PL offset is the first correction parameter.

5. The method according to claim 3 or 4, characterized in that, The second network device is a single uplink device and the first network device and the second network device do not perform joint reception, or, the second network device is a single uplink device, the terminal device only performs uplink communication with the second network device, and the signal reception quality of the second network device is higher than that of the first network device, and the value of PL offset is less than 0.

6. The method according to any one of claims 3 - 5, characterized in that, The second network device is a single uplink device, the first network device and the second network device perform joint reception, and the propagation loss between the terminal device and the first network device is less than the transmission loss between the terminal device and the second network device, or, the second network device is a single uplink device and the terminal device performs uplink communication with the first network device and the second network device at the same time, and the value of PL offset is greater than 0.

7. The method according to any one of claims 3 - 6, characterized in that, The second network device is a non-single uplink device, or the second network device and the first network device are the same device, or the second network device is a single uplink device, the terminal device only performs uplink communication with the first network device, and the signal reception quality of the first network device is higher than that of the second network device, and the value of PL offset is 0.

8. The method according to claim 1 or 2, characterized in that, The correction parameter includes a second correction parameter, and the downlink path loss correction result satisfies the following formula: P X = α × PL × β PL Among them, P X is the downlink path loss correction result, α is the path loss compensation factor, PL is the downlink path loss estimation value, and β PL is the second correction parameter.

9. The method according to claim 1 or 2, characterized in that, The correction parameter includes a second correction parameter, and the downlink path loss correction result satisfies the following formula: P X = PL × β PL where P X is the downlink path loss correction result, PL is the downlink path loss estimated value, and β PL is the second correction parameter.

10. The method according to claim 8 or 9, characterized in that, The second network device is a single uplink device and the first network device and the second network device do not perform joint reception, or, the second network device is a single uplink device, the terminal device only performs uplink communication with the second network device and the signal reception quality of the second network device is higher than that of the first network device, β PL takes a value greater than 0 and less than 1.

11. The method according to any one of claims 8 - 10, characterized in that, The second network device is a single uplink device, the first network device and the second network device perform joint reception, and the propagation loss between the terminal device and the first network device is less than the transmission loss between the terminal device and the second network device, or, the second network device is a single uplink device and the terminal device performs uplink communication with the first network device and the second network device simultaneously, β PL has a value greater than 1.

12. The method according to any one of claims 8 - 11, characterized in that, The second network device is a non-single uplink device, or the second network device and the first network device are the same device, or the second network device is a single uplink device, the terminal device only performs uplink communication with the first network device, and the signal reception quality of the first network device is higher than that of the second network device, and the value of β PL is 1.

13. The method according to claim 1 or 2, characterized in that, The correction parameter includes a first correction parameter and a second correction parameter, and the downlink path loss correction result satisfies the following formula: P X = α × PL + PL offset × β PL where P X is the downlink path loss correction result, α is the path loss compensation factor, PL is the downlink path loss estimated value, and PL offset is the first correction parameter, and β PL is the second correction parameter.

14. The method according to claim 1 or 2, characterized in that, The correction parameter includes a first correction parameter and a second correction parameter, and the downlink path loss correction result satisfies the following formula: P X =PL + PL offset ×β PL where P X is the downlink path loss correction result, PL is the downlink path loss estimated value, PL offset is the first correction parameter, and β PL is the second correction parameter.

15. The method according to claim 13 or 14, characterized in that, The second network device is a single uplink device and the first network device and the second network device do not perform joint reception, or, the second network device is a single uplink device, the terminal device only performs uplink communication with the second network device, and the signal reception quality of the second network device is higher than that of the first network device, β PL has a value greater than 0 and less than 1, and PL offset has a value less than 0.

16. The method according to any one of claims 13 - 15, characterized in that, The second network device is a single uplink device, the first network device and the second network device perform joint reception, and the propagation loss between the terminal device and the first network device is less than the transmission loss between the terminal device and the second network device, or, the second network device is a single uplink device and the terminal device performs uplink communication with the first network device and the second network device simultaneously, β PL has a value greater than 1, PL offset has a value greater than 0.

17. The method according to any one of claims 13 - 16, characterized in that, The second network device is a non-single uplink device, or the second network device and the first network device are the same device, or the second network device is a single uplink device, the terminal device only performs uplink communication with the first network device, and the signal reception quality of the first network device is higher than that of the second network device, β PL takes a value of 1, and PL offset takes a value of 0.

18. The method according to any one of claims 1 - 17, characterized in that, The correction parameter is determined by a path loss difference between the terminal device and the first network device and the terminal device and the second network device, and / or a path loss ratio between the terminal device and the first network device and the terminal device and the second network device.

19. A communication device, characterized in that, The communication device includes a transceiver unit and a processing unit; The transceiver unit is configured to receive target information from a first network device, where the target information is used to indicate a correction parameter; The processing unit is configured to determine a target transmit power for sending a target signal to a second network device, where the target transmit power is determined based on a downlink path loss correction result, and the downlink path loss correction result is determined by the correction parameter and a downlink path loss estimation result, and the downlink path loss estimation result is determined by a path loss compensation factor configured by the first network device and / or a downlink path loss estimated value measured by the terminal device based on a downlink reference signal of the first network device.

20. A communication device, characterized in that, The communication device includes a transceiver unit and a processing unit; The processing unit is configured to determine target information for indicating a correction parameter, where the correction parameter and a downlink path loss estimation result are used to determine a downlink path loss correction result, and the downlink path loss correction result is used to determine a target transmission power for the terminal device to send a target signal to a second network device; the downlink path loss estimation result is determined by a path loss compensation factor configured by the first network device and / or a downlink path loss estimation value measured by the terminal device based on a downlink reference signal of the first network device. The transceiver unit is configured to send the target information to the terminal device.

21. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, which when run, implements the communication method according to any one of claims 1 to 17.

22. A chip, characterized in that, It includes a processor and an interface; The processor is configured to read instructions to execute the communication method according to any one of claims 1 to 17.

23. A computer program product, the computer program product being executed by a computer to perform the communication method according to any one of claims 1 to 17.

24. A communication device, characterized in that, It includes: At least one processor and a memory; The memory is configured to store a computer program; The processor is configured to execute the computer program stored in the memory, so that the communication device executes the communication method according to any one of claims 1 to 17.

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