Communication method and communication apparatus

Abstract

Provided in the present application are a communication method and a communication apparatus. When there is no downlink between a terminal device and a second network device on a millimeter wave frequency band, the terminal device receives the configuration of an initial transmit power from a first network device on a low frequency band, and transmits an uplink signal to the second network device on the basis of the initial transmit power. The second network device measures the uplink signal, and provides a measurement result of the uplink signal to the first network device. On the basis of the measurement result, the first network device calculates a power adjustment amount and issues same to a UE, so as to realize closed-loop adjustment for a transmit power of an uplink signal that the UE transmits to the second network device, such that the second network device can correctly receive the uplink signal of the UE. Since the terminal device may not support or may disable a downlink function of the millimeter wave frequency band in terms of hardware, the complexity and cost of the terminal device can be reduced.

Description

Communication method and communication apparatus

[0001] This application claims priority to the Chinese patent application No. 202411353469.3, filed on September 25, 2024, and entitled "Communication method and communication apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of wireless communication, and more particularly, to a communication method and a communication apparatus. BACKGROUND

[0003] Under an ideal line of sight (LOS) single path, the greater the bandwidth of a positioning sounding reference signal (PosSRS), the smaller the measurement error of a time of arrival (TOA). Under an actual multi-path, increasing the bandwidth of the PosSRS is beneficial to improving the multi-path resolution, and thus improving the measurement accuracy of the TOA, that is, the greater the bandwidth of the PosSRS, the higher the positioning accuracy. The 5th generation (5G) system has abundant spectrum resources in the millimeter wave frequency band, and the carrier bandwidth can reach 400MHz or 800MHz. A super large bandwidth of more than 800MHz can be obtained through co-construction and sharing between different operators. Therefore, high-precision positioning can be realized based on the millimeter wave.

[0004] In a positioning scheme based on the PosSRS, processes such as timing advance adjustment and open-loop power control are involved. In order to support the timing advance adjustment, a user equipment (UE) is required to support a downlink synchronization signal and synchronize with a base station in the millimeter wave frequency band; the UE needs to provide an uplink reference signal for the base station to measure a timing advance (TA); and the base station needs to issue a TA adjustment command, which requires the UE to support data transmission function. In order to support the open-loop power control, the UE needs to be able to measure a reference signal for calculating the downlink loss.

[0005] The millimeter wave frequency band belongs to a high frequency band. Currently, a UE supporting the millimeter wave frequency band generally also supports a low frequency band. The above-mentioned positioning scheme based on the PosSRS requires the UE to have complete or nearly complete 5G functions in the millimeter wave frequency band, which leads to an increase in the complexity and cost of the UE. SUMMARY

[0006] The present application provides a communication method and a communication apparatus, which can reduce the complexity and cost of a UE supporting the millimeter wave frequency band.

[0007] In a first aspect, a communication method is provided, which can be executed by a communication device or a module (e.g., a processor, a chip, a circuit, etc., which can also be a logical module, hardware and / or software capable of realizing all or part of the functions of the communication device) applied to the communication device. As an example, the communication device is a terminal device. The method comprises: sending, by the terminal device, a first uplink signal to a second network device using a first transmission power, there being no downlink between the terminal device and the second network device; receiving, by the terminal device, first information from the first network device, the first information being used to indicate a power adjustment amount, the power adjustment amount being determined based on a measurement result of the first uplink signal by the second network device; and determining, by the terminal device, a transmission power of a second uplink signal sent by the terminal device to the second network device based on the power adjustment amount.

[0008] In this solution, the terminal device sends a first uplink signal, a second network device without a downlink to the terminal device measures the first uplink signal to obtain a measurement result. The first network device determines a power adjustment amount of a transmission power of an uplink signal sent by the terminal device to the second network device based on the measurement result. Then, the transmission power of the uplink signal sent to the second network device is adjusted according to the power adjustment amount, so that the next uplink signal (i.e., the second uplink signal) is transmitted at the adjusted transmission power, realizing closed-loop adjustment of the transmission power. This solution does not require the terminal device to support the operating frequency band (e.g., the millimeter wave frequency band) of the second network device in hardware, but can determine the transmission power of the uplink signal sent by the terminal device to the second network device, realize uplink transmission, and reduce the complexity and cost of the terminal device.

[0009] This solution solves the problem of how to control the transmission power of the uplink signal when there is no downlink between the second network device and the terminal device.

[0010] In combination with the first aspect, in some implementations of the first aspect, the first transmission power is an initial transmission power, the initial transmission power being a power at which the terminal device first sends an uplink signal to the second network device, and the first uplink signal being the uplink signal first sent by the terminal device to the second network device; and the method further comprises: receiving, by the terminal device, second information from the first network device, the second information indicating the initial transmission power.

[0011] In this implementation, the first uplink signal can be the uplink signal first sent by the terminal device to the second network device. At this time, the transmission power of the first uplink signal can be sent by the first network device to the terminal device through the downlink, providing a method of configuring the initial transmission power.

[0012] With reference to the first aspect, in some implementations of the first aspect, the receiving the second information from the second network device comprises: receiving a broadcast message from the second network device, the broadcast message containing the second information.

[0013] In this implementation, the initial transmit power can be sent to the terminal device through a broadcast message. As an example, the broadcast message can be specifically a SIB1 message.

[0014] With reference to the first aspect, in some implementations of the first aspect, the first transmit power is a transmit power of an uplink signal transmitted by the terminal device to the second network device for any time after the first time, the first transmit power being related to the initial transmit power, a subcarrier spacing and a bandwidth of the uplink signal; and the adjusting the first transmit power based on the power adjustment amount comprises: determining a transmit power of the second uplink signal based on the power adjustment amount, the initial transmit power, the subcarrier spacing and the bandwidth of the uplink signal.

[0015] In this implementation, if the first uplink signal is for any time after the first time, the transmit power of the first uplink signal, i.e., the first transmit power, is related to a plurality of parameters, or is determined based on these parameters, thereby providing a method for determining the transmit power of a signal of an uplink channel between a terminal device and a second network device without a downlink.

[0016] With reference to the first aspect, in some implementations of the first aspect, the receiving the first information from the first network device comprises: receiving a paging message from the first network device, the paging message containing the first information; or receiving downlink control information from the first network device, the downlink control information containing the first information.

[0017] In this implementation, the first network device sends the power adjustment amount to the terminal device through different signaling based on the terminal device being in an RRC inactive state or an RRC connected state.

[0018] With reference to the first aspect, in some implementations of the first aspect, the first information is a transport power control (TPC) information element, and a value of the TPC information element and the power adjustment amount satisfy a mapping relationship.

[0019] In this implementation, the mapping relationship between the value of the TPC information element and the power adjustment amount is established, so that the power adjustment amount can be indirectly indicated through the value of the TPC information element. Compared with directly indicating the power adjustment amount, the indication overhead can be reduced.

[0020] In a possible implementation of the first aspect, the first network device and the second network device operate in different frequency bands, or the first network device and the second network device operate in the same frequency band.

[0021] The above implementations are applicable to scenarios in which the two network devices operate in the same frequency or different frequencies. When operating in the same frequency, the first network device can receive or not receive the uplink signal between the terminal device and the second network device; when operating in different frequencies, the solution of the present application is applicable to a scenario in which the terminal device does not support or turn off the downlink function of the frequency band (for example, a high frequency band) corresponding to the second network device, and can reduce the complexity and cost of the terminal device.

[0022] In a second aspect, a communication method is provided, which can be executed by a communication apparatus or a module (for example, a processor, a chip, a circuit, etc., which can also be a logical module, hardware and / or software capable of implementing all or part of the functions of the communication apparatus) applied to the communication apparatus. As an example, the communication apparatus is a terminal device. The method includes: transmitting a first uplink signal; receiving a first message from a first network device, the first message indicating a power control parameter, the power control parameter being configured based on a path loss difference, the path loss difference being a difference between path losses of the first network device and a second network device with respect to the terminal device, the path loss difference being determined based on measurement results of the first network device and the second network device on the first uplink signal, and no downlink between the terminal device and the second network device; and determining, based on the power control parameter, a transmission power of a second uplink signal transmitted to the second network device.

[0023] In the present solution, the first network device and the second network device with no downlink with respect to the terminal device measure the first uplink signal of the terminal device, and the first network device and the second network device obtain measurement results (denoted as a first measurement result and a second measurement result) of the first uplink signal respectively. The first network device obtains the second measurement result measured by the second network device, and determines, based on the first measurement result measured by itself, a difference between the two measurement results, that is, a difference between path losses of the first network device and the second network device with respect to the terminal device. After determining the path loss difference, the first network device configures a power control parameter (referred to as a power control parameter for short) based on the path loss difference, and sends the power control parameter to the terminal device. The terminal device determines, based on the power control parameter indicated by the first network device, a transmission power of the second uplink signal transmitted to the second network device.

[0024] Correspondingly, since the power control parameter is configured by the first network device considering the path loss difference, the terminal device sends the second uplink signal based on the power control parameter, which is equivalent to compensating the uplink path loss between the terminal device and the second network device, and the second network device can correctly receive the uplink signal of the terminal device, and the receiving performance of the second network device on the uplink signal can be improved.

[0025] In some implementations of the second aspect, the first uplink signal is a physical random access channel (PRACH) signal.

[0026] This implementation is suitable for the scenario of initial access of the terminal device to the network.

[0027] In some implementations of the second aspect, the first uplink signal is any one of a physical uplink shared channel (PUSCH), a sounding reference signal (SRS), or a positioning sounding reference signal (SRS); the power control parameter includes a path loss coefficient or a target received power; or the first uplink signal is a physical uplink control channel (PUCCH), and the power control parameter includes a target received power.

[0028] It should be noted that the power control parameter is configured based on the path loss difference, and in this implementation, the power control parameter includes a path loss coefficient or a target received power, which means that the path loss difference is converted (or embodied or reflected) in these power control parameters. Alternatively, the power control parameter issued by the first network device to the UE can also include other parameters, but the above-mentioned power control parameters are determined by the first network device after considering the path loss difference.

[0029] In this implementation, based on the different uplink signals sent by the terminal device, the first network device can configure the corresponding power control parameters of the uplink signals according to the path loss difference.

[0030] In some implementations of the second aspect, the first network device and the second network device work in the same frequency band.

[0031] This scheme is suitable for the scenario where the first network device and the second network device work in the same frequency, for example, both work in a low frequency band or a high frequency band.

[0032] In a third aspect, a communication method is provided, which can be performed by a communication device or a module (e.g., a processor, a chip, a circuit, etc., which can also be a logical module, hardware and / or software capable of realizing all or part of the functions of the communication device) applied to the communication device. As an example, the communication device is a network device. The method comprises: obtaining a measurement result of a first uplink signal of a terminal device by a second network device, wherein there is no downlink between the terminal device and the second network device; determining a power adjustment amount based on the measurement result, wherein the power adjustment amount is used to determine a transmission power of a second uplink signal of the terminal device to the second network device; and sending first information to the terminal device, wherein the first information is used to indicate the power adjustment amount.

[0033] With reference to the third aspect, in some implementations of the third aspect, the method further comprises: sending second information to the terminal device, wherein the second information indicates an initial transmission power, and the initial transmission power is a power of the terminal device to send an uplink signal to the second network device for the first time.

[0034] With reference to the third aspect, in some implementations of the third aspect, the first uplink signal is an uplink signal sent by the terminal device to the second network device for the first time, and a transmission power of the first uplink signal is the initial transmission power.

[0035] With reference to the third aspect, in some implementations of the third aspect, the first uplink signal is an uplink signal sent by the terminal device to the second network device for the first time, and a transmission power of the first uplink signal is the initial transmission power.

[0036] With reference to the third aspect, in some implementations of the third aspect, the sending of the first information to the terminal device comprises: sending a paging message to the terminal device, wherein the paging message contains the first information; or sending downlink control information to the terminal device, wherein the downlink control information contains the first information.

[0037] In a fourth aspect, a communication method is provided, which can be performed by a communication device or a module (e.g., a processor, a chip, a circuit, etc., which can also be a logical module, hardware and / or software capable of realizing all or part of the functions of the communication device) applied to the communication device. As an example, the communication device is a network device. The method includes: measuring a first uplink signal from a terminal device to obtain a first measurement result; obtaining a second measurement result from a second network device, the second measurement result being a measurement result of the first uplink signal by the second network device, and there being no downlink between the second network device and the terminal device; determining a path loss difference based on the first measurement result and the second measurement result, the path loss difference being a difference between path losses between the first network device and the terminal device and between the second network device and the terminal device; and sending a first message to the terminal device, the first message indicating a power control parameter configured based on the path loss difference.

[0038] With reference to the fourth aspect, in some implementations of the fourth aspect, the first uplink signal includes a physical random access channel (PRACH) signal.

[0039] With reference to the fourth aspect, in some implementations of the fourth aspect, the first uplink signal is any one of a physical uplink shared channel (PUSCH), a sounding reference signal (SRS) or a positioning sounding reference signal (SRS), and the power control parameter includes a path loss coefficient or a target received power; or the first uplink signal is a physical uplink control channel (PUCCH), and the power control parameter includes a target received power.

[0040] With reference to the fourth aspect, in some implementations of the fourth aspect, the first network device and the second network device operate in the same frequency band.

[0041] The method of the third aspect and the fourth aspect above are network-side implementations of the method of the first aspect and the second aspect, respectively, and have beneficial technical effects as described with reference to the first aspect or the second aspect, which will not be repeated here.

[0042] In a fifth aspect, a communication device is provided, which has a function of implementing the method of the first aspect or the second aspect, or any possible implementation of these aspects; or has a function of implementing the method of the third aspect or the fourth aspect, or any possible implementation of these aspects. The function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions.

[0043] In a sixth aspect, a communication apparatus is provided with a function of implementing the method in the first aspect or the second aspect, or any possible implementation of these aspects; or a function of implementing the method in the third aspect or the fourth aspect, or any possible implementation of these aspects. The function can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions.

[0044] In a seventh aspect, a communication apparatus is provided, which includes at least one processor configured to cause the communication apparatus to perform the method in the first aspect or the second aspect, or any possible implementation of these aspects; or perform the method in the third aspect or the fourth aspect, or any possible implementation of these aspects. Optionally, the at least one processor is coupled with at least one memory for storing computer programs or instructions, and the at least one processor is configured to invoke and run the computer programs or instructions from the at least one memory, so as to cause the communication apparatus to perform the method in the first aspect or the second aspect, or any possible implementation of these aspects; or perform the method in the third aspect or the fourth aspect, or any possible implementation of these aspects. Optionally, the at least one processor can be included in the communication apparatus, or configured outside the communication apparatus. Optionally, the communication apparatus further includes the at least one memory. Optionally, the communication apparatus further includes at least one communication interface. As an example, the communication interface can include an input interface and / or an output interface, or an interface circuit.

[0045] In an eighth aspect, a communication apparatus is provided, which includes a communication interface and a circuit. The communication interface is configured to receive a signal to be processed, and transmit the signal to the circuit. The circuit is configured to process the signal, so as to perform the method in the first aspect or the second aspect, or any possible implementation of these aspects; or perform the method in the third aspect or the fourth aspect, or any possible implementation of these aspects. Optionally, the communication interface is further configured to output the signal processed by the circuit. Optionally, the signal can include information and / or data. Optionally, the communication apparatus can be a chip (such as a baseband chip) or a chip system.

[0046] In a ninth aspect, a computer readable storage medium is provided, which stores computer program codes or instructions. When the computer program or instructions are run on a computer, the method in the first aspect or the second aspect, or any possible implementation of these aspects is implemented; or the method in the third aspect or the fourth aspect, or any possible implementation of these aspects is implemented.

[0047] In a tenth aspect, a computer program product is provided, which comprises computer program code or instructions, which, when the computer program code or instructions are executed on a computer, cause the method according to the first aspect or the second aspect, or any possible implementation of these aspects, to be implemented; or the method according to the third aspect or the fourth aspect thereof, or any possible implementation of these aspects, to be implemented.

[0048] In an eleventh aspect, a wireless communication system is provided, which comprises a communication device according to the fifth aspect and a communication device according to the sixth aspect. BRIEF DESCRIPTION OF DRAWINGS

[0049] FIG. 1 is a known positioning scheme based on positioning sounding reference signals.

[0050] FIG. 2 is a schematic diagram of a system architecture applicable to the present application.

[0051] FIG. 3 is a schematic flowchart of a communication method 300 provided by the present application.

[0052] FIG. 4 is a schematic diagram of a system architecture applicable to Example 1.

[0053] FIG. 5 is a schematic diagram of a closed-loop power control mechanism provided by the present application.

[0054] FIG. 6 is a schematic diagram of a system architecture applicable to Example 2.

[0055] FIG. 7 is a schematic flowchart of a communication method 700 provided by the present application.

[0056] FIG. 8 is a schematic structural diagram of a communication device 1000 provided by the present application.

[0057] FIG. 9 is a schematic structural diagram of another communication device provided by the present application.

[0058] FIG. 10 is a schematic structural diagram of a chip provided by the present application. DETAILED DESCRIPTION

[0059] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0060] Figure 1 is a known positioning scheme based on positioning reference signals. The serving cell and neighbor cells obtain base station positioning measurements such as time of arrival (TOA), angel of arrival (AoA) based on positioning sounding reference signals (PosSRS). The following refers to the positioning SRS. The protocol has the following provisions on the physical layer process of the positioning SRS.

[0061] 1) Timing advance (TA) adjustment of the positioning SRS. The positioning SRS sent by the UE can be received by multiple cells, although the distances of the UE to these cells are different, the TA of the positioning SRS is calculated based on the serving cell.

[0062] 2) Power control of the positioning SRS. The UE measures the downlink signal of the target cell that needs to receive the positioning SRS, which is referred to as the path loss reference signal. The UE performs open loop control on the transmission power of the positioning SRS according to the measured path loss.

[0063] The scheme shown in Figure 1 requires the positioning terminal to have complete or nearly complete 5G functions in the millimeter wave frequency band. In order to support the positioning SRS timing advance adjustment:

[0064] 1) The UE needs to support SSB signals and synchronize with the base station downlink in the millimeter wave frequency band;

[0065] 2) The UE needs to provide an uplink reference signal for the base station to measure the TA;

[0066] 3) The base station needs to issue a TA adjustment command, which requires the UE to support data transmission functions.

[0067] In addition, in order to support the open loop power control of the positioning SRS:

[0068] 1) The UE needs to be able to measure the reference signal for calculating the downlink path loss.

[0069] The current terminal supporting millimeter wave not only has complete millimeter wave functions, but also has relatively high specifications, such as supporting dual connectivity, carrier aggregation, and generally supporting both sub-6GHz and millimeter wave frequency bands. Ultimately, it leads to the increase of complexity and cost of the millimeter wave terminal.

[0070] Therefore, the present application provides a low-cost millimeter wave frequency band positioning scheme, in which there is no downlink between the UE and the target receiving base station device. How to determine the transmission power of the uplink signal of the UE is a problem to be solved.

[0071] The present application provides two schemes for power control of uplink signals in a scenario where there is no downlink between a UE and a target receiving base station device.

[0072] The technical scheme of the present application is introduced as follows.

[0073] The technical scheme of the present application can be applied to various existing communication systems and future communication systems, including but not limited to: satellite communication systems, the 5th generation (5G) system or new radio (NR) system, long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, and future communication systems, etc. In addition, it can also be applied to sidelink (SL) communication, vehicle-to-everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and internet of things (IoT) communication system or other communication systems, etc., which are not limited herein.

[0074] Exemplarily, the terminal device can also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, mobile terminal (MT), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user apparatus. The terminal device in the embodiments of the present application can refer to a device providing voice and / or data connectivity for a user, and can be used to connect people, things and machines, for example, handheld devices with wireless connection function, vehicle-mounted devices, etc. The terminal device in the embodiments of the present application can be a mobile phone, a tablet computer, a notebook computer, a palm computer, a mobile internet device (MID), a wearable device, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical surgery, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Optionally, the UE can be used to act as a base station. For example, the UE can act as a scheduling entity, which provides sidelink signals between UEs in V2X or SL, etc. The terminal device in the embodiments of the present application can support high frequency bands (or referred to as FR2 bands) corresponding to millimeter wave bands, and can also support low frequency bands (or referred to as FR1 bands).

[0075] In the embodiments of the present application, the device for implementing the functions of the terminal device can be a terminal device, or a device capable of supporting the terminal device to implement the corresponding functions, for example, a combination of a chip, a processor, a circuit, hardware and / or software. The device is located at the terminal side, and can be configured in the terminal device or used in matching with the terminal device. In the embodiments of the present application, only the device for implementing the corresponding functions of the terminal device is taken as an example to illustrate the terminal device.

[0076] The network device in the embodiments of the present application can include a device for communicating with a terminal device, and the network device can include an access network device or a radio access network device, for example, the network device can be a base station. The access network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) that accesses a terminal device to a wireless network. The base station can broadly cover the following various names, or be replaced by the following names, for example: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), primary station, secondary station, motor slide retainer (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), radio unit (RU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node or a combination thereof. The base station can also refer to a communication module, modem or chip used in the aforementioned device or apparatus. The base station can also be a mobile switching center and a device that performs the function of a base station in D2D, V2X, M2M communication, a network device (such as a base station) in a future communication network or a device that performs the function of a network device, etc. The base station can support networks of the same or different access technologies. Optionally, the RAN node can also be a server, a wearable device, a vehicle or a vehicle-mounted device, etc. For example, the access network device in the vehicle to everything (V2X) technology can be a road side unit (RSU). The embodiments of the present application do not limit the specific technology and specific device form of the network device.

[0077] The base station can be fixed or mobile. For example, a helicopter or a drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station. In other examples, the helicopter or the drone can be configured to serve as a device that communicates with another base station.

[0078] In some deployments, the network device in the embodiments of the present application can be a device including a CU, or a DU, or a device including a CU and a DU, or a control plane CU node (central unit-control plane (CU-CP)) and a user plane CU node (central unit-user plane (CU-UP)) and a DU node. For example, the network device can include a gNB-CU-CP, a gNB-CU-UP and a gNB-DU.

[0079] In some deployments, wireless access is assisted by a plurality of RAN nodes cooperating to assist a terminal, and different RAN nodes respectively implement part of the functions of a base station. For example, the RAN node can be a CU, a DU, a CU-CP, a CU-UP, or an RU, etc. The CU and the DU can be separately arranged, or can also be included in the same network element, such as a BBU. The RU can be included in a radio frequency device or a radio frequency unit, such as an RRU, an AAU or an RRH.

[0080] In different systems, the CU (or CU-CP and CU-UP), DU or RU can also have different names, but those skilled in the art can understand their meanings. For example, in an open radio access network (open RAN, ORAN / O-RAN) system, the CU can also be referred to as an open CU (O-CU), and the DU can also be referred to as an open DU (O-DU). The CU-CP can also be referred to as an O-CU-CP, the CU-UP can also be referred to as an O-CU-UP, and the RU can also be referred to as an O-RU. Any one of the CU (or CU-CP, CU-UP), DU and RU in the embodiments of the present application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0081] In the embodiments of the present application, the device for implementing the functions of the network device can be a network device; it can also be a device capable of supporting the network device to implement the corresponding functions, such as a chip, a processor, a circuit, a combination of hardware and / or software. The device is located at the network side and can be configured in the network device or used in combination with the network device. In the embodiments of the present application, only the device for implementing the corresponding functions of the network device is taken as an example for description.

[0082] FIG. 2 is a schematic diagram of a system architecture to which the present application is applicable. As shown in FIG. 2, in the system architecture, there are two types of base station devices, which are denoted as base station device 1 and base station device 2. Among them, the base station device 1 has complete downlink and uplink with the UE, and the base station device 2 only has uplink with the UE, and does not have downlink.

[0083] The base station device 1 and the base station device 2 can work in the same frequency band or different frequency bands. The base station device 2 does not support the downlink function in hardware or supports the downlink function in hardware but turns off the downlink function. The downlink signaling of the base station device 2 is sent to the UE by the base station device 1.

[0084] When the base station device 1 and the base station device 2 work in different frequency bands, the UE can not support or turn off the downlink function of the frequency band of the base station device 2 in hardware.

[0085] When the base station device 1 and the base station device 2 work in the same frequency band, the base station device 1 can receive or not receive the uplink data and / or uplink signal of the UE.

[0086] FIG. 3 is a schematic flowchart of a communication method 300 provided in the present application. Steps 310-330 in the method 300 can be executed by a terminal device or an apparatus (such as a chip, a processor or a circuit, etc.) applied to the terminal device, and a network device or an apparatus (such as a chip, a processor or a circuit, etc.) applied to the network device. Optionally, in the embodiments of the present application, the network device can be one or more (for example, two or more), depending on the specific examples. In the following embodiments, the terminal device and the network device are taken as examples for description.

[0087] 310. The terminal device sends a first uplink signal to a second network device by using a first transmission power.

[0088] Wherein, there is no downlink between the terminal device and the second network device.

[0089] 320. The terminal device receives first information from a first network device, and the first information is used to indicate a power adjustment amount.

[0090] The power adjustment amount is determined based on a measurement result of the first uplink signal sent by the terminal device to the second network device.

[0091] As an example, the terminal device sends a first uplink signal, the second network device measures the first uplink signal to obtain a measurement result, for example, a reference signal receiving power (RSRP). The second network device indicates the measurement result to the first network device, the first network device determines the power adjustment amount based on the measurement result, and sends the first information to the terminal device to indicate the power adjustment amount through the first information.

[0092] Optionally, there can be one or more second network devices. When there are multiple second network devices, each of the second network devices measures the first uplink signal of the terminal device and obtains a measurement result. The multiple second network devices respectively indicate the measurement results of the first uplink signal to the first network device, and the first network device synthesizes the measurement results of the multiple second network devices to finally determine the power adjustment amount.

[0093] 330、The terminal device determines the transmission power of the terminal device for sending the second uplink signal to the second network device based on the power adjustment amount.

[0094] The terminal device sends the first uplink signal and receives the power adjustment amount determined based on the measurement of the first uplink signal from the first network device. Then, the terminal device adjusts the transmission power of the uplink signal according to the power adjustment amount, so as to transmit the next uplink signal (i.e., the second uplink signal) at the adjusted transmission power, thereby realizing closed-loop adjustment of the transmission power.

[0095] Optionally, the first uplink signal can be the uplink signal sent by the terminal device to the second network device for the first time, and the first transmission power is the initial transmission power. The first uplink signal can also be any uplink signal sent after the first time.

[0096] If the first uplink signal is any uplink signal sent after the first time, as an example, the terminal device determines the transmission power of the second uplink signal according to the power adjustment amount indicated by the first network device, which can be calculated by the following formula:

[0097] wherein P CMAX is the maximum transmission power of the terminal device, P init is the initial power spectral density, M is the bandwidth of the terminal device for sending the uplink signal (e.g., positioning SRS) in units of resource blocks (RB), μ is a parameter indicating the subcarrier spacing, and h is the closed-loop adjustment part, i.e., the power adjustment amount indicated by the first network device. It can be seen that the first transmission power is related to the initial transmission power (or the initial power spectral density), the subcarrier spacing, the bandwidth of the uplink signal, and the power adjustment amount indicated by the first network device, or in other words, the first transmission power is determined according to these parameters. As an example, the closed-loop adjustment supports two modes of cumulative adjustment and absolute adjustment. For cumulative adjustment, the UE receives one transmit power command (TPC), and h is added with the power adjustment amount δ indicated by the TPC; for absolute adjustment, the UE receives one TPC, and h is updated to the power adjustment amount δ indicated by the TPC.

[0098] In the above formula (1), the initial power spectral density P initThe initial power spectral density P

[0099] 1) In one possible implementation, the initial power spectral density P init may be broadcast to all terminal devices through a system information block 1 (SIB1). Generally, in the same scenario, the initial power spectral density P init of all positioning SRS resource sets is the same. init may be broadcast to all terminal devices through the SIB1. However, if the initial power spectral density P init of a positioning SRS resource set is different from the initial power spectral density P init indicated in the SIB1, the initial power spectral density P init of the positioning SRS resource set is configured by the p0-r16 element in the SRS-PosResourceSet-r16 or by a newly added element (for example, element A) in the SRS-PosResourceSet-r16, instead of the initial power spectral density P init indicated in the SIB1.

[0100] 2) In another possible implementation, the initial power spectral density P init of each positioning SRS resource set is directly configured by the p0-r16 element or the newly added element A in the corresponding PosResourceSet-r16.

[0101] It can be seen that, in the former implementation, the initial power spectral density P init may be configured at a cell level and configured at a UE level for individual terminal devices, and in the latter implementation, the initial power spectral density P init is configured at a UE level.

[0102] In the embodiments of the present application, the uplink signal transmitted by the terminal device takes the positioning SRS as an example, and other uplink signals can also be used. When the uplink signal transmitted by the terminal device is other than the positioning SRS, the initial power spectral density P init of the other uplink signal can be issued to the terminal device by the first network device through corresponding configuration of the other uplink signal.

[0103] The method 300 is exemplified below in combination with Example 1 and Example 2.

[0104] Example 1

[0105] FIG. 4 is a schematic diagram of a system architecture suitable for example 1. Base station device 1 and base station device 2 work in different frequency bands, for example, base station device 1 works in frequency band 1, and base station device 2 works in frequency band 2. There is an uplink and a downlink between the UE and base station device 1, and only an uplink between the UE and base station device 2. The UE does not support the downlink function of frequency band 2 of base station device 2 in hardware. As an example, base station device 1 works in a sub-6GHz frequency band, and base station device 2 works in a millimeter wave frequency band.

[0106] The UE transmits a positioning SRS of 400MHz large bandwidth in the millimeter wave frequency band, and the UE is an eRedcap terminal in the sub-6GHz frequency band with a bandwidth of 20MHz. The specification of the UE in the frequency band of base station device 1 is not limited, and in other embodiments, the UE can be a Redcap terminal, an MBB terminal or a terminal of other specifications. The UE accesses the wireless network from the sub-6GHz frequency band, and the data transmission function and the control plane function of the positioning are also carried in the sub-6GHz frequency band.

[0107] It should be understood that eRedcap is based on the concept of RedCap (reduced capability) and is a technology designed to further reduce data rates and terminal costs. RedCap, i.e. "reduced capability", is a technical standard protocol for 5G application scenarios with low speed and low latency requirements, aiming to comprehensively improve the quality and coverage of 5G networks, and can also be understood as "lightweight 5G". The implementation of eRedcap UE (user equipment) is based on RedCap UE, and by further reducing the data rate (generally not more than 10Mbps) and reducing the terminal cost requirements, the needs of specific application scenarios are met.

[0108] The base station device 2 in the millimeter wave frequency band receives the positioning SRS and performs positioning-related measurements.

[0109] In this example, there is no downlink between base station device 2 and the UE, and the open-loop power control mechanism based on the path loss of the positioning SRS cannot be applied, but the closed-loop power control mechanism provided by the present application is adopted.

[0110] As described in method 300, the closed-loop power control mechanism provided by the present application mainly includes the configuration of the initial power spectral density P0 of the uplink signal and the closed-loop control process.

[0111] FIG. 5 is a schematic diagram of the closed-loop power control mechanism provided by the present application.

[0112] 501, the UE transmits the positioning SRS using the latest effective transmission power.

[0113] It should be understood that the "latest effective transmission power" refers to the transmission power of the positioning SRS calculated by the above formula (1).

[0114] In addition, when the UE first transmits the positioning SRS to the base station device 2, the UE transmits the positioning SRS using the initial transmission power received from the base station device 1.

[0115] 502、The base station device 2 measures the positioning SRS from the UE and obtains a measurement result. As an example, the measurement result can be the received strength of the positioning SRS.

[0116] 503、The base station device 1 acquires the measurement result of the positioning SRS from the base station device 2.

[0117] As an example, the base station device 2 sends the measurement result to the base station device 1, or the base station device 1 requests the measurement result from the base station device 2. The message between the base station device 2 and the base station device 1 is a gNB internal message, and can also be Xn interface signaling between gNBs.

[0118] It should be noted that if there are multiple base station devices 2, the base station device 1 determines the final power adjustment amount by synthesizing the measurement results of all the base station devices 2.

[0119] 504、The base station device 1 sends a TPC command, and the TPC command is used to indicate the power adjustment amount determined by the base station device 1.

[0120] The UE receives the TPC command from the base station device 1.

[0121] The power adjustment amount is determined by the base station device 1 based on the measurement result of the positioning SRS received from the base station device 2.

[0122] The UE acquires the power adjustment amount from the TPC command, and adjusts the transmission power of the uplink signal based on the power adjustment amount. In this way, the closed-loop control of the transmission power of the positioning SRS sent by the UE to the base station device 2 can be realized, so that the base station device 2 can correctly receive the positioning SRS sent by the UE.

[0123] As described above, the TPC command supports both cumulative adjustment and absolute adjustment. The UE adjusts the transmission power of the positioning SRS according to the adjustment mode of the TPC command.

[0124] If the UE is in an RRC inactive state (RRC_INACTIVE), the base station device 1 can carry the TPC command through a paging message. The present application does not limit the position and data type of the TPC command in the paging message.

[0125] Optionally, the uplink signal transmitted by the terminal device can be other uplink signal(s) in addition to the positioning SRS. The base station device 1 calculates the power adjustment amount in a similar manner and adds the corresponding TPC command in the paging message to indicate the power adjustment amount to the UE.

[0126] If the UE is in the RRC_CONNECTED state, the base station device 1 can issue the power adjustment amount to the UE through the downlink control information (DCI). As an example, the base station device 1 issues the TPC through DCI Format 2_3. DCI Format 2_3 belongs to group common DCI, and the payload thereof contains blocks of multiple UEs, and the starting position of each UE block is indicated by the fieldTypeFormat2-3 in the RRC configuration SRS-TPC-CommandConfig. In this embodiment, each block can contain a 2-bit TPC command. Optionally, this example also supports other uplink channel(s) or uplink signal(s), which can be one or more. For example, the TPC of the physical uplink shared channel (PUSCH) or the physical uplink control channel (PUCCH) is issued through DCI Format 2_2, and the TPC of the SRS is issued through DCI Format 2_3.

[0127] In one example, the mapping relationship between the value of the TPC and the power adjustment amount δ can be defined regardless of the RRC_INACTIVE state or the RRC_CONNECTED state. One possible mapping relationship is shown in Table 1 or Table 2. In Table 1, the value of the TPC field corresponds to the cumulative power adjustment amount, and in Table 2, the value of the TPC field corresponds to the absolute power adjustment amount.

[0128] Table 1

[0129] Table 2

[0130] As can be seen, through the mapping relationship defined in Table 1 or Table 2, the UE can determine the corresponding power adjustment amount according to the value of the TPC indicated by the base station device 1.

[0131] Example 2

[0132] Figure 6 is a schematic diagram of a system architecture suitable for example 2. There is full downlink and uplink between the UE and base station device 1, and only uplink between the UE and base station device 2. Unlike example 1, base station device 1 and base station device 2 operate in the same frequency band.

[0133] The closed loop power control method in example 1 is also applicable to example 2, and will not be described again.

[0134] In addition, the present application also provides another scheme for transmitting power control, which is described below in conjunction with Figure 7.

[0135] Figure 7 is a schematic flowchart of a communication method 700 provided by the present application. Steps 710-720 in method 700 can be performed by a terminal device or a device (such as a chip, processor or circuit, etc.) applied to the terminal device, and a network device or a device (such as a chip, processor or circuit, etc.) applied to the network device. Optionally, in the embodiments of the present application, the network device can be one or more (for example, two or more), depending on the specific example. In the following embodiments, the terminal device and the network device are taken as examples for description.

[0136] 710. The terminal device transmits a first uplink signal.

[0137] 720. The terminal device receives a first message from the first network device, the first message indicating a power control parameter, the power control parameter being configured based on a path loss difference. The path loss difference is a difference between path losses of the first network device and the second network device with respect to the terminal device. The path loss difference is determined based on measurement results of the first network device and the second network device on the first uplink signal. There is no downlink between the terminal device and the second network device.

[0138] Optionally, method 700 further includes step 730.

[0139] 730. The terminal device determines a transmission power of a second uplink signal transmitted to the second network device based on the power control parameter.

[0140] In one possible implementation, the first uplink signal is a PRACH, which can be suitable for a scenario where the terminal device initially accesses the network. In another possible implementation, the first uplink signal is any uplink signal transmitted by the terminal device after accessing the network. The terminal device can be in a mobile state, and the transmission power of the uplink signal transmitted by the terminal device will also be constantly adjusted with the movement of the position.

[0141] In the method 700, the first network device and the second network device obtain the measurement results (denoted as the first measurement result and the second measurement result) of the first uplink signal by measuring the first uplink signal, for example, the received strength of the first uplink signal. The first network device obtains the second measurement result measured by the second network device, and determines the difference between the two measurement results, i.e., the difference between the path losses between the two network devices and the UE, based on the first measurement result measured by the first network device. After determining the difference between the path losses, the first network device configures a power control parameter (referred to as a power control parameter for short) based on the difference between the path losses, and sends the power control parameter to the terminal device. As an example, the power control parameter can be a path loss coefficient, a target received power, etc., without limitation. The terminal device obtains the corresponding power control parameter, for example, the path loss coefficient or the target received power of the network side, from the first network device, and determines the transmission power of the second uplink signal sent to the second network device. In this way, the second network device can correctly receive the uplink signal of the terminal device.

[0142] In this scheme, the first network device and the second network device respectively measure the first uplink signal to obtain the respective measurement results, for example, RSRP. Since the downlink between the terminal device and the first network device exists, the terminal device can determine the downlink path loss of the first network device by measuring the downlink signal of the first network device. Based on the reciprocity of the uplink and downlink channels, the terminal device can obtain the uplink path loss (referred to as the first path loss) between the first network device and the terminal device. Meanwhile, the first network device can determine the difference between the path losses based on the measurement results of the first uplink signal measured by the first network device and the second network device, and the difference between the path losses is the difference between the first path loss and the second path loss, and the second path loss is the uplink path loss between the second network device and the terminal device. Taking the measurement result as RSRP as an example, the difference between the path losses is the difference between RSRP1 and RSRP2. Based on the difference between the path losses and the first path loss, the first network device can calculate the second path loss, and then configure (or based on the difference between the path losses) and send the power control parameter of the terminal device to the second network device to send the uplink signal.

[0143] The method 700 is exemplified below in conjunction with Example 3.

[0144] Example 3

[0145] The system architecture of this example is shown in FIG. 6. In Example 3, taking the first uplink signal PRACH sent by the UE as an example, the power control method is as follows:

[0146] The UE sends a PRACH, and the base station device 1 and the base station device 2 obtain, by measuring the PRACH, the respective received signal strengths of the base station device 1 and the base station device 2, denoted as RSRP_1 and RSRP_2, and the difference between the two is the difference in path loss between the two base station devices and the UE (i.e., the path loss difference), denoted as PL_delta, where PL represents the path loss. The base station device 1 configures, based on the path loss difference, a power control parameter for the UE to send an uplink signal to the base station device 2. As an example, for PUSCH, SRS, or positioning SRS, the power control parameter issued by the base station device 1 can be a path loss coefficient or a target received power; for PUCCH, the power control parameter can be a target received power on the network side. Alternatively, for different uplink signals, the base station device 1 can configure, according to the calculated path loss difference, a corresponding power control parameter for the UE to compensate, so that the base station device 2 can correctly receive the uplink signal of the UE.

[0147] In summary, in the above embodiments of the present application, in the case that there is no downlink between the terminal device and the second network device supporting the millimeter wave frequency band, the present application provides two power control schemes. In one scheme, the terminal device receives an initial transmit power configuration from the first network device of the low frequency band, and transmits an uplink signal to the second network device based on the initial transmit power. The second network device measures the uplink signal from the terminal device and provides the measurement result of the uplink signal to the first network device. The first network device calculates a power adjustment amount based on the measurement result of the second network device and sends it to the UE, so that the UE adjusts the transmit power when transmitting the uplink signal to the second network device based on the power adjustment amount, and realizes closed-loop adjustment of the transmit power, thereby solving the problem that there is no downlink between the terminal device and the second network device, the second network device cannot directly send a TPC command to the terminal device, and open-loop power control cannot be used. In addition, in this scheme, the terminal device does not need to measure the downlink reference signal of the second network device, and when the first network device and the second network device work in different frequency bands, the terminal device does not need to support the downlink function of the millimeter wave frequency band in hardware, so that the terminal device can not support or turn off the downlink function of the millimeter wave frequency band of the second network device in hardware, and the complexity and cost of the terminal device can be reduced. On this basis, when the uplink signal transmitted by the terminal device is a reference signal for positioning, such as positioning SRS, a low-cost millimeter wave frequency band positioning scheme for the terminal device can be realized. In another scheme, the first network device and the second network device measure the first uplink signal transmitted by the terminal device to obtain measurement results. The first network device determines the difference (i.e. the path loss difference) between the path losses between the two network devices and the terminal device based on the measurement results of the first uplink signal by the first network device and the second network device. The first network device configures power control parameters for the terminal device to transmit the uplink signal to the second network device based on the path loss difference, so as to compensate for the path loss between the terminal device and the second network device. The terminal device can determine the transmit power of the uplink signal to the second network device based on the path loss coefficient obtained from the first network device, the target receive power of the network side and other power control parameters. In this scheme, the terminal device can also achieve the same technical effects as the previous scheme, which will not be described here.

[0148] The above is a detailed description of the communication method provided by the present application. The communication device provided by the present application is introduced below.

[0149] FIG. 8 is a schematic structural diagram of a communication apparatus 1000 provided in the present application. The communication apparatus 1000 can be a terminal device, or can be a device applied to a terminal device and capable of implementing corresponding functions of the terminal device in the method embodiments of the present application, for example, a chip, a processor, or a circuit, etc. Alternatively, the communication apparatus 1000 can be a network device, or can be a device applied to a network device and capable of implementing corresponding functions of the network device in the method embodiments of the present application, for example, a chip, a processor, or a circuit, etc.

[0150] Optionally, the communication apparatus 1000 includes a processing module 1001, which can be a processor, a processing board, a processing unit, or a processing device, etc., configured to perform operations / processes, etc. implemented internally by the communication apparatus 1000. Optionally, the communication apparatus 1000 further includes a communication module 1002, which can also be referred to as a transceiver module, a transceiver, a transceiver device, etc., configured to perform receiving (or inputting) and / or transmitting (or outputting) operations.

[0151] In one implementation, the communication apparatus 1000 is a terminal device or a device applied to a terminal device.

[0152] In one example, the communication module is configured to:

[0153] transmit, to a second network device, a first uplink signal using a first transmit power, wherein there is no downlink between the communication apparatus and the second network device; and

[0154] receive, from a first network device, first information, wherein the first information indicates a power adjustment amount, and wherein the power adjustment amount is determined based on a measurement result of the first uplink signal by the second network device;

[0155] the processing module is configured to determine a transmit power of a second uplink signal to the second network device based on the power adjustment amount.

[0156] In another example, the communication module is configured to receive, from the first network device, second information, wherein the second information indicates the initial transmit power.

[0157] In another example, the communication module is configured to receive, from the second network device, a broadcast message, wherein the broadcast message includes the second information.

[0158] In another example, the processing module is configured to determine the transmit power of the second uplink signal based on the power adjustment amount, the initial transmit power, the subcarrier spacing, and a bandwidth of the uplink signal.

[0159] In another example, the communication module is configured to: receive a paging message from the first network device, the paging message comprising the first information; or receive a downlink control information from the first network device, the downlink control information comprising the first information.

[0160] In one example, the communication module is configured to:

[0161] transmit a first uplink signal;

[0162] receive a first message from the first network device, the first message indicating a power control parameter, the power control parameter being configured based on a path loss difference, the path loss difference being a difference between path losses of the first network device and the second network device respectively to the communication apparatus, the path loss difference being determined based on measurement results of the first network device and the second network device on the first uplink signal, and no downlink between the communication apparatus and the second network device;

[0163] The processing module is configured to determine a transmission power of a second uplink signal transmitted by the communication apparatus to the second network device based on the power control parameter.

[0164] In another implementation, the communication apparatus 1000 is a network device or an apparatus applied to a network device.

[0165] In one example, the communication module is configured to: obtain a measurement result of a first uplink signal of a terminal device by a second network device, and no downlink between the terminal device and the second network device;

[0166] The processing module is configured to: determine a power adjustment amount based on the measurement result, the power adjustment amount being used to determine a transmission power of a second uplink signal transmitted by the terminal device to the second network device; and

[0167] The communication module is further configured to transmit first information by the terminal device, the first information being used to indicate the power adjustment amount.

[0168] In another example, the communication module is configured to: transmit second information to a terminal device, the second information indicating an initial transmission power, the initial transmission power being a power of a first uplink signal transmitted by the terminal device to the second network device.

[0169] In one example, the communication module and the processing module are configured to: measure a first uplink signal from a terminal device to obtain a first measurement result;

[0170] The communication module is configured to obtain a second measurement result from a second network device, the second measurement result being a measurement result of the first uplink signal by the second network device, and there being no downlink between the second network device and the terminal device.

[0171] The processing module is configured to determine a path loss difference based on the first measurement result and the second measurement result, the path loss difference being a difference between path losses between the first network device and the second network device and the terminal device respectively.

[0172] The communication module is further configured to send, by the terminal device, a first message, the first message indicating a power control parameter, the power control parameter being configured based on the path loss difference. For details, refer to the detailed description of the corresponding steps in the method embodiments, which will not be repeated here.

[0173] The operations / processing performed by the processing module 1001 and the communication module 1002 described above can refer to the detailed description of the corresponding steps in the method embodiments, which will not be repeated here. In addition, it should be noted that the aforementioned communication module and / or processing module can be implemented by a virtual module, for example, the processing module can be implemented by a software function unit or a virtual device, and the communication module can be implemented by a software function or a virtual device. Alternatively, the processing module or the communication module can also be implemented by an entity device, for example, if the device is implemented by a chip / circuit (such as an integrated circuit or a logic circuit, etc.). The communication module can be an input / output circuit and / or a communication interface, performing input operations (corresponding to the aforementioned receiving operations) and output operations (corresponding to the aforementioned sending operations); the processing module is an integrated processor or microprocessor or circuit (such as an integrated circuit, a logic circuit, etc.).

[0174] The division of the modules in the present application is illustrative, and is only a logical function division. In actual implementation, there can be another division manner. In addition, each functional module in each example of the present application can be integrated in one processor, or can be a separate physical existence, or two or more modules can be integrated in one module. The integrated module can be realized in the form of hardware, or in the form of a software functional module, or in the form of a combination of hardware and software.

[0175] Figure 9 is a schematic structural diagram of another communication apparatus provided in the present application. The communication apparatus 1100 can be used to implement the functions of any one of the communication devices (e.g., terminal device or network device) in the communication system described in the foregoing examples. The communication apparatus 1100 can include at least one processor 1110. Optionally, the processor 1110 (or processing apparatus) is coupled with a memory, which can be located within the communication apparatus, or the memory can be integrated with the processor, or the memory can also be located outside the communication apparatus. For example, the communication apparatus 1100 can further include at least one memory 1120. The memory 1120 stores computer programs, instructions or data necessary for implementing any one of the method embodiments described above; the processor 1110 can execute the computer programs, instructions or data stored in the memory 1120 to complete the corresponding functions of the terminal device or network device in any one of the embodiments described above.

[0176] Optionally, the communication apparatus 1100 can further include a communication interface 1130, and the communication apparatus 1100 can interact with other devices through the communication interface 1130. For example, the communication interface 1130 can be a transceiver, circuit, bus, module, pin or other type of communication interface. When the communication apparatus 1100 is a chip-type apparatus or circuit, the communication interface 1130 in the apparatus 1100 can also be an input / output circuit, which can input information (or receive information) and / or output information (or send information); the processor can be an integrated circuit or logic circuit, etc., and the processor can determine the output information according to the input information.

[0177] The coupling in the present application is an indirect coupling or communication connection between apparatuses, units or modules, which can be electrical, mechanical or other forms, for information interaction between apparatuses, units or modules. The processor 1110 can operate in cooperation with the memory 1120 and the communication interface 1130. The connection medium between the processor 1110, the memory 1120 and the communication interface 1130 is not limited in the present application.

[0178] Figure 10 is a schematic structural diagram of a chip provided in the present application. The chip 30 includes a circuit 31 and a communication interface 32. The circuit 31 can be a logic circuit, an integrated circuit, etc., and the communication interface 32 can also be referred to as an input / output circuit, an input / output interface, an interface circuit, etc., which can input information (or receive information) or output information (or send information). The chip 30 can execute the method performed by the terminal device or network device in the embodiments of the present application.

[0179] Further, the present application also provides a computer readable storage medium, wherein computer instructions are stored, and when the computer instructions are run on a computer, operations and / or processes performed by a terminal device or a network device (for example, a first network device) in any one of the method embodiments of the present application are performed.

[0180] The present application also provides a computer program product, which comprises computer program codes or instructions, and when the computer program codes or instructions are run on a computer, operations and / or processes performed by a terminal device or a network device (for example, a first network device) in any one of the method embodiments of the present application are performed.

[0181] Further, the present application also provides a chip, which comprises a processor. A memory for storing a computer program is arranged independently of the chip, and the processor is configured to execute the computer program stored in the memory, so that operations and / or processes performed by a terminal device or a network device in any one of the method embodiments are performed. Further, the chip can also comprise a communication interface. The communication interface can be an input / output interface, an interface circuit or the like. Further, the chip can also comprise the memory.

[0182] The present application provides a communication system, which comprises a terminal device and a network device in any one of the method embodiments. The network device can comprise a first network device and a second network device, and the second network device can be one or more, without limitation.

[0183] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described herein.

[0184] In the embodiments of the present application, "indication" can include direct indication, indirect indication, explicit indication and implicit indication. When it is described that certain indication information is used to indicate A, it can be understood that the indication information carries A, which can be direct indication of A or indirect indication of A. Indirect indication can mean that the indication information directly indicates B, and a corresponding relationship between B and A is obtained to achieve the purpose of indicating A through the indication information. The corresponding relationship between B and A can be pre-defined by a protocol, pre-stored, or obtained through configuration between network elements.

[0185] The processor in the embodiments of the present application has signal processing capability, and can be a central processing unit (CPU), and can also be a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the disclosed methods, steps and logic block diagrams in the present application. The general processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the present application can be directly embodied as hardware processor execution, or executed by a combination of hardware and software modules in the processor. The software module can be located in a random memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register or other mature storage medium in the art. The storage medium is located in the memory, and the processor reads the information in the memory, and combines the hardware to complete the steps of the above method.

[0186] In embodiments of the application, the memory can be volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. By way of illustration, and not limitation, nonvolatile memory can be read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically EPROM (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), which acts as external cache. By way of illustration and 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 direct rambus RAM (DR RAM). It is to be noted that the system and method described herein are intended to include all types of memory, and are not limited to the types of memory described herein.

[0187] The technical solutions provided in the present application can be realized by software, hardware, firmware or any combination thereof, in whole or in part. When realized by software, the technical solutions can be realized in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a terminal device, an access network device or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available media can be magnetic media (such as floppy disk, hard disk, magnetic tape), optical media (such as digital video disc (DVD)), or semiconductor media, etc.

[0188] At least one (item) involved in the embodiments of the present application means one (item) or more (items). More (items) means two (items) or more than two (items). "And / or" is used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone.

[0189] The term "comprising" mentioned in the embodiments of the present application and any variation thereof is intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but optionally includes other steps or units not listed, or optionally includes other steps or units inherent to the process, method, product or device.

[0190] In the present application, the methods and / or terms between the method embodiments can be mutually referred to each other without logical contradiction, for example, the functions and / or terms between the device embodiments can be mutually referred to each other, for example, the functions and / or terms between the device examples and the method examples can be mutually referred to each other.

[0191] Those skilled in the art can appreciate that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solutions. Those skilled in the art can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0192] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic. The division of the units is only a logical function division. In actual implementation, there can be another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0193] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, i.e. they can be located in one place or distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0194] In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0195] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the parts that make contributions to the prior art or parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for making a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0196] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A communication method characterized by comprising: The method is applied to a terminal device, and comprises the following steps: sending a first uplink signal to a second network device by using a first transmission power, wherein there is no downlink between the terminal device and the second network device; receiving first information from a first network device, wherein the first information is used for indicating a power adjustment amount, and the power adjustment amount is determined based on a measurement result of the second network device on the first uplink signal; determining a transmission power of a second uplink signal sent by the terminal device to the second network device based on the power adjustment amount.

2. The method of claim 1, wherein, The first transmission power is an initial transmission power, the initial transmission power is a power at which the terminal device sends an uplink signal to the second network device for the first time, and the first uplink signal is an uplink signal sent by the terminal device to the second network device for the first time; the method further comprises the following steps: receiving second information from the first network device, wherein the second information indicates the initial transmission power.

3. The method of claim 2, wherein, The receiving of the second information from the second network device comprises the following steps: receiving a broadcast message from the second network device, wherein the broadcast message contains the second information.

4. The method of claim 1, wherein, The first transmission power is a transmission power of an uplink signal sent by the terminal device to the second network device for any time after the first time, and the first transmission power is related to an initial transmission power, a subcarrier spacing and a bandwidth of the uplink signal. The adjustment of the first transmission power based on the power adjustment amount comprises the following steps: determining the transmission power of the second uplink signal based on the power adjustment amount, the initial transmission power, the subcarrier spacing and the bandwidth of the uplink signal. The receiving of the first information from the first network device comprises the following steps:

5. The method according to any one of claims 1 to 4, characterized in that, receiving a paging message from the first network device, wherein the paging message contains the first information; or receiving downlink control information from the first network device, wherein the downlink control information contains the first information. The first information is a transmission power control (TPC) information element, and a value of the TPC information element and the power adjustment amount satisfy a mapping relationship.

6. The method according to any one of claims 1 to 5, characterized in that, The first network device and the second network device work in different frequency bands, or the first network device and the second network device work in the same frequency band.

7. The method according to any one of claims 1 to 6, characterized in that, The method is applied to a terminal device, and comprises the following steps:

8. A communication method characterized by comprising: sending a first uplink signal; receiving first information from a first network device, wherein the first information indicates a power control parameter, the power control parameter is configured based on a path loss difference, the path loss difference is a difference between path losses of the first network device and a second network device with respect to the terminal device, and the path loss difference is determined based on measurement results of the first network device and the second network device on the first uplink signal, wherein there is no downlink between the terminal device and the second network device; determining a transmission power of a second uplink signal sent to the second network device based on the power control parameter. The first uplink signal is a physical random access channel (PRACH) signal.

9. The method of claim 8, wherein, ​ 10. The method of claim 8, wherein, The first uplink signal is any one of a physical uplink shared channel (PUSCH), a sounding reference signal (SRS), or a positioning sounding reference signal (SRS); and the power control parameter includes a path loss coefficient or a target received power. The first uplink signal is a physical uplink control channel (PUCCH), and the power control parameter includes a target received power.

11. The method according to any one of claims 8 to 10, characterized in that, The first network device and the second network device operate in the same frequency band.

12. A communication method characterized by comprising: The method applied to the first network device comprises: obtaining a measurement result of a first uplink signal of a terminal device by a second network device, wherein there is no downlink between the terminal device and the second network device; determining a power adjustment amount based on the measurement result, wherein the power adjustment amount is used to determine a transmission power of a second uplink signal of the terminal device to the second network device; sending first information to the terminal device, wherein the first information is used to indicate the power adjustment amount.

13. The method of claim 12, wherein, The method further comprises: sending second information to the terminal device, wherein the second information indicates an initial transmission power, and the initial transmission power is a power of the first uplink signal of the terminal device to the second network device.

14. The method of claim 13, wherein, The first uplink signal is the first uplink signal of the terminal device to the second network device, and a transmission power of the first uplink signal is the initial transmission power.

15. The method of claim 13, wherein, The first uplink signal is any one of a physical uplink shared channel (PUSCH), a sounding reference signal (SRS), or a positioning sounding reference signal (SRS); and the power control parameter includes a path loss coefficient or a target received power.

16. A method of communication, comprising: The method applied to the first network device comprises: measuring a first uplink signal from a terminal device to obtain a first measurement result; obtaining a second measurement result from a second network device, wherein the second measurement result is a measurement result of the first uplink signal by the second network device, and there is no downlink between the terminal device and the second network device; determining a path loss difference based on the first measurement result and the second measurement result, wherein the path loss difference is a difference between path losses of the first network device and the second network device respectively with respect to the terminal device; sending a first message to the terminal device, wherein the first message indicates a power control parameter, and the power control parameter is configured based on the path loss difference.

17. The method of claim 16, wherein, The first uplink signal includes a physical random access channel (PRACH) signal.

18. The method of claim 16, wherein, The first uplink signal is any one of a physical uplink shared channel (PUSCH), a sounding reference signal (SRS), or a positioning sounding reference signal (SRS); and the power control parameter includes a path loss coefficient or a target received power. The first uplink signal is a physical uplink control channel (PUCCH), and the power control parameter includes a target received power.

19. The method of any one of claims 16-18, wherein, The first network device and the second network device operate in the same frequency band.

20. A communications device, characterized by The method comprises a module or unit for performing the method as claimed in any one of claims 1-19.

21. A communications device, characterized by comprising a communication interface for obtaining information required for performing the method according to any one of claims 1-11 and sending the information to a circuitry for performing the method according to any one of claims 1-11 based on the received information; or, comprising a communication interface for obtaining information required for performing the method according to any one of claims 12-19 and sending the information to a circuitry for performing the method according to any one of claims 12-19 based on the received information.

22. A communications device, characterized by comprising a processor coupled with a memory, the processor configured to execute computer programs or instructions stored in the memory to cause the communication device to perform the method according to any one of claims 1-11 or the method according to any one of claims 12-19.

23. A computer-readable storage medium, characterized in that, The computer readable storage medium has stored therein computer instructions, when the computer instructions are run on a computer, the method according to any one of claims 1-11 is implemented, or the method according to any one of claims 12-19 is implemented.

24. A computer program product, characterised in that, The computer program product comprises computer program codes or instructions, when the computer program codes or instructions are run on a computer, the method according to any one of claims 1-11 is implemented, or the method according to any one of claims 12-19 is implemented.

25. A wireless communication system, characterized by comprising at least two communication devices configured to perform the method according to any one of claims 1-11 or the method according to any one of claims 12-19.

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