Communication method and related device

Abstract

The invention discloses a communication method and a related device, and the communication method comprises the steps: transmitting a second uplink signal to second network equipment; receiving a measurement result of a second uplink signal from a second network device; and determining the path loss of the second uplink signal based on the measurement result of the second uplink signal. In the embodiment of the invention, the terminal equipment can send the uplink signal to the network equipment, the network equipment measures the uplink signal and informs the terminal equipment of the measurement result, so that the terminal equipment can obtain the path loss between the terminal equipment and the network equipment based on the measurement result sent by the network equipment. Whether the network equipment has a downlink function or not can be judged, the path loss between the terminal equipment and the network equipment can be obtained in this way, and the applicability of the scheme is improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method and related devices. Background Art

[0002] In wireless communication systems, terminal devices need to determine the transmission power of uplink signals before sending uplink signals to network devices. Currently, the network device mainly sends downlink signals to the terminal device, and the terminal device calculates the transmission power of its uplink signal based on the signal transmission path loss of the downlink signal (that is, the degree of energy attenuation during the signal transmission process from the network device to the terminal device, referred to as path loss). However, the applicability of this solution is relatively low. Summary of the Invention

[0003] The embodiment of the present application provides a communication method and related devices, which sends an uplink signal through a terminal device to obtain the path loss between the terminal device and the network device, which is conducive to improving the applicability of the path loss acquisition solution to the scenario.

[0004] In a first aspect, an embodiment of the present application provides a communication method, which is applied to a terminal device side, such as a terminal or a communication module in a terminal, or a circuit or chip in a terminal responsible for a communication function (such as a modem chip, also known as a baseband chip, or a system-on-chip (SoC) chip or a system-in-package (SIP) chip containing a modem core). Taking the application of this method to a terminal device as an example, the method includes:

[0005] Sending a second uplink signal to the second network device;

[0006] receiving a measurement result of a second uplink signal from a second network device;

[0007] The path loss of the second uplink signal is determined based on the measurement result of the second uplink signal.

[0008] In which, the communication method can be applied to a communication system including a first network device, a terminal device and the above-mentioned second network device, the terminal device sends a first uplink signal to the first network device, the first uplink signal is used to determine the path loss between the terminal device and the first network device, and the second uplink signal is used to determine the path loss between the terminal device and the second network device.

[0009] As can be seen, in the embodiments of the present application, a terminal device can transmit an uplink signal to a network device, which then measures the uplink signal and transmits the measurement result to the terminal device. This allows the terminal device to obtain the path loss between the terminal device and the network device based on the measurement result transmitted by the network device. Regardless of whether the network device has downlink functionality, the path loss between the terminal device and the network device can be obtained in this manner, improving the applicability of the solution.

[0010] In a possible implementation, the measurement result of the second uplink signal includes one or more of the following:

[0011] received power of the second uplink signal;

[0012] path loss of the second uplink signal;

[0013] a difference between the received power of the second uplink signal and the received power of the first uplink signal;

[0014] a difference between the path loss of the second uplink signal and the path loss of the first uplink signal;

[0015] Among them, the first uplink signal is an uplink signal sent by the terminal device to the first network device.

[0016] Among them, the first network device can measure the first uplink signal to obtain a measurement result of the first uplink signal, and the measurement result of the first uplink signal includes the received power of the first uplink signal, the path loss of the first uplink signal, etc. The first network device can send the received power of the first uplink signal or the path loss of the first uplink signal to the second network device. The second network device can obtain the difference between the received power of the second uplink signal and the received power of the first uplink signal based on the received power of the first uplink signal and the received power of the second uplink signal; the second network device can obtain the difference between the path loss of the second uplink signal and the path loss of the first uplink signal based on the path loss of the first uplink signal and the path loss of the second uplink signal.

[0017] In this implementation, the second network device can directly indicate the path loss of the second uplink signal to the terminal device, or it can indicate the calculation parameters of the path loss of the second uplink signal (such as received power, received power difference, path loss difference, etc.) to the terminal device, so that the terminal device can determine the path loss of the second uplink signal based on these calculation parameters.

[0018] In a possible implementation, the measurement result of the second uplink signal is carried in a medium access control MAC control element CE.

[0019] In this implementation, the second network device may indicate the measurement result of the second uplink signal to the terminal device through a dedicated MAC CE or an enhanced version of an existing MAC CE.

[0020] In a possible implementation, the MAC CE is a first MAC CE; the first MAC CE includes a measurement result of the second uplink signal and one or more of the following:

[0021] The index of the second uplink signal;

[0022] The index of the resource set corresponding to the second uplink signal.

[0023] In this implementation, the second network device may place K measurement results of the second uplink signal into the first MACCE to indicate the measurement results to the terminal device via the first MACCE, thereby facilitating the terminal device to obtain the path loss of the second uplink signal based on the measurement results. In addition, the index of the second uplink signal and / or the index of the resource set corresponding to the second uplink signal is placed in the first MACCE, and the reference signal resource in the activated second TCI-state can be associated with the second uplink signal returning the measurement result via the index, for example, the second uplink signal returning the measurement result is the reference signal resource in the activated second TCI-state or a better reference signal resource in the activated second TCI-state.

[0024] The second TCI state is an uplink TCI state or an uplink / downlink TCI state corresponding to the second control channel group. The second TCI state is a TCI state used for uplink transmission between the terminal device and the second network device.

[0025] The second control channel group is a control channel group corresponding to the second network device.

[0026] The first control channel group is a control channel group corresponding to the first network device, and the uplink TCI state or the uplink and downlink TCI state corresponding to the first control channel group is a first TCI state.

[0027] In one possible implementation, there are M second uplink signals; the first MAC CE includes measurement results of K second uplink signals, where K is equal to the number of activated second transmission configuration indication TCI states; or K is equal to the number of different reference signal resources included in the activated second TCI state; and M is greater than or equal to K.

[0028] In this implementation, the number K of measurement results of the second uplink signal in the first MAC CE can be equal to the number of activated second TCI-states; or it can be equal to the number of different reference signal resources included in the activated second TCI-state, so that the second network device can indicate the reference signal resources in the activated second TCI-state to the terminal device.

[0029] In one possible implementation, the i-th measurement result among the K measurement results corresponds to the i-th TCI state among the K activated second TCI states; or, the i-th measurement result among the K measurement results corresponds to the reference signal resource in the i-th TCI state among the K activated second TCI states.

[0030] In this implementation, the i-th measurement result among the K measurement results in the first MAC CE corresponds to the i-th TCI-state among the activated K second TCI-states or the reference signal resource in the i-th second TCI-state among the activated K second TCI-states.

[0031] In a possible implementation manner, the MAC CE is a second MAC CE; the second MAC CE is a MAC CE used to activate the TCI state of the control resource group; and the second MAC CE includes a measurement result of the second uplink signal.

[0032] In a possible implementation, when the second MACCE satisfies a first condition, the second MACCE includes a measurement result of the second uplink signal. The first condition includes a combination of one or more of the following:

[0033] The value of the first field in the second MACCE is 1;

[0034] The second MACCE contains one field indicating that the second MACCE contains a bit indicating a measurement result of the second uplink signal;

[0035] One of the first network device and the second network device has only an uplink function, or the RRC configuration is that the downlink is based on transmission of a single network device and the uplink is based on transmission of two network devices;

[0036] The path loss reference signal resource in the TCI-state activated by the second MACCE is the SRS resource;

[0037] The TCI-state activated by the second MACCE is the uplink TCI-state.

[0038] In this implementation, the MAC CE used to activate the TCI-state of the control resource group can be enhanced by introducing an additional field to indicate one or more measurement results, which correspond to the one or more TCI-states activated by the MACCE, or the reference signal resources in the activated one or more TCI-states.

[0039] In a possible implementation, the MAC CE is a third MAC CE; the third MAC CE is a MAC CE used to activate an uplink and downlink joint TCI state; and the third MAC CE includes a measurement result of the second uplink signal.

[0040] In a possible implementation, when the third MACCE satisfies the second condition, the third MACCE includes the measurement result of the second uplink signal. The second condition includes a combination of one or more of the following:

[0041] The third MACCE contains one field indicating that the third MACCE contains a bit indicating a measurement result of the second uplink signal;

[0042] One of the first network device and the second network device has only an uplink function, or the RRC configuration is that the downlink is based on transmission of a single network device and the uplink is based on transmission of two network devices;

[0043] The path loss reference signal resources in the TCI-state activated by the third MACCE are SRS resources.

[0044] In this implementation, the MAC CE used to activate the joint uplink and downlink TCI-state can be enhanced by introducing an additional field to indicate one or more measurement results, which correspond to one or more TCI-states activated by the MACCE, or the reference signal resources in the activated one or more TCI-states.

[0045] In a possible implementation, the MAC CE is a fourth MAC CE; the fourth MAC CE is a MAC CE used to activate an uplink and downlink independent TCI state; and the fourth MAC CE includes a measurement result of the second uplink signal.

[0046] In a possible implementation, when the fourth MACCE satisfies the third condition, the fourth MACCE includes the measurement result of the second uplink signal. The third condition includes a combination of one or more of the following:

[0047] The presence of one field in the fourth MACCE indicates that the third MACCE contains a bit indicating a measurement result of the second uplink signal;

[0048] One of the first network device and the second network device has only an uplink function, or the RRC configuration is that the downlink is based on transmission of a single network device and the uplink is based on transmission of two network devices;

[0049] The path loss reference signal resources in the TCI-state activated by the fourth MACCE are SRS resources.

[0050] In this implementation, the MAC CE used to activate independent uplink and downlink TCI-states can be enhanced by introducing additional fields to indicate one or more measurement results, which correspond to one or more TCI-states activated by the MAC CE, or the reference signal resources in the activated one or more TCI-states.

[0051] In a possible implementation, when the measurement result of the second uplink signal includes the received power of the second uplink signal, determining the path loss of the second uplink signal based on the measurement result of the second uplink signal includes:

[0052] The path loss of the second uplink signal is determined based on the received power of the second uplink signal and the transmitted power of the second uplink signal.

[0053] In this implementation, when the second network device informs the terminal device of the RSRP of the second uplink signal, the terminal device can obtain the path loss of the second uplink signal based on the RSRP and transmit power of the second uplink signal, and thus can determine the transmit power of the next uplink signal based on the path loss.

[0054] In a possible implementation, the method further includes:

[0055] determining a transmit power of a third uplink signal based on a path loss of the second uplink signal;

[0056] The third uplink signal is sent to the second network device using the transmission power of the third uplink signal.

[0057] In this implementation, the terminal device can determine the transmission power of the third uplink signal based on the path loss value corresponding to the TCI-state adopted by the third uplink signal, or based on the path loss value of the reference signal in the TCI-state adopted by the third uplink signal, so that the third uplink signal can be sent using this transmission power.

[0058] In a second aspect, an embodiment of the present application provides a communication method, which is applied to a network side, such as a second network device or a chip in the second network device, and the method includes:

[0059] receiving a second uplink signal sent by the terminal device;

[0060] Obtaining a measurement result of a second uplink signal;

[0061] Send the measurement result of the second uplink signal to the terminal device.

[0062] As can be seen, in the embodiments of the present application, the network device can receive the uplink signal sent by the terminal device, measure the uplink signal, and then notify the terminal device of the measurement result, so that the terminal device can obtain the path loss between itself and the network device based on the measurement result sent by the network device. Regardless of whether the network device has downlink functionality, the path loss between the terminal device and the network device can be obtained in this way, which improves the applicability of the solution.

[0063] In a possible implementation, the measurement result of the second uplink signal includes one or more of the following:

[0064] received power of the second uplink signal;

[0065] path loss of the second uplink signal;

[0066] a difference between the received power of the second uplink signal and the received power of the first uplink signal;

[0067] a difference between the path loss of the second uplink signal and the path loss of the first uplink signal;

[0068] Among them, the first uplink signal is an uplink signal sent by the terminal device to the first network device.

[0069] In this implementation, the second network device can directly indicate the path loss of the second uplink signal to the terminal device, or it can indicate the calculation parameters of the path loss of the second uplink signal (such as RSRP, RSRP difference, path loss difference, etc.) to the terminal device, so that the terminal device can determine the path loss of the second uplink signal based on these calculation parameters.

[0070] In a possible implementation, the measurement result of the second uplink signal is carried in a medium access control MAC control element CE.

[0071] In this implementation, the second network device may indicate the measurement result of the second uplink signal to the terminal device through a dedicated MAC CE or an enhanced version of an existing MAC CE.

[0072] In a possible implementation, the MAC CE is a first MAC CE; the first MAC CE includes a measurement result of the second uplink signal and one or more of the following:

[0073] The index of the second uplink signal;

[0074] The index of the resource set corresponding to the second uplink signal.

[0075] In this implementation, the second network device may place K measurement results of the second uplink signal into the first MACCE to indicate the measurement results to the terminal device via the first MACCE, thereby facilitating the terminal device to obtain the path loss of the second uplink signal based on the measurement results. In addition, the index of the second uplink signal and / or the index of the resource set corresponding to the second uplink signal is placed in the first MACCE, and the reference signal resource in the activated second TCI-state can be associated with the second uplink signal returning the measurement result via the index, for example, the second uplink signal returning the measurement result is the reference signal resource in the activated second TCI-state or a better reference signal resource in the activated second TCI-state.

[0076] The second TCI state is an uplink TCI state or an uplink and downlink TCI state corresponding to the second control channel group.

[0077] In one possible implementation, there are M second uplink signals; the first MAC CE includes measurement results of K second uplink signals, where K is equal to the number of activated second transmission configuration indication TCI states; or K is equal to the number of different reference signal resources included in the activated second TCI state; and M is greater than or equal to K.

[0078] In this implementation, the number K of measurement results of the second uplink signal in the first MAC CE can be equal to the number of activated second TCI-states; or it can be equal to the number of different reference signal resources included in the activated second TCI-state, so that the second network device can indicate the reference signal resources in the activated second TCI-state to the terminal device.

[0079] In one possible implementation, the i-th measurement result among the K measurement results corresponds to the i-th TCI state among the K activated second TCI states; or, the i-th measurement result among the K measurement results corresponds to the reference signal resource in the i-th TCI state among the K activated second TCI states.

[0080] In this implementation, the i-th measurement result among the K measurement results in the first MAC CE corresponds to the i-th TCI-state among the activated K second TCI-states or the reference signal resource in the i-th second TCI-state among the activated K second TCI-states.

[0081] In a possible implementation manner, the MAC CE is a second MAC CE; the second MAC CE is a MAC CE used to activate the TCI state of the control resource group; and the second MAC CE includes a measurement result of the second uplink signal.

[0082] In this implementation, the MAC CE used to activate the TCI-state of the control resource group can be enhanced by introducing an additional field to indicate one or more measurement results, which correspond to the one or more TCI-states activated by the MACCE, or the reference signal resources in the activated one or more TCI-states.

[0083] In a possible implementation, the MAC CE is a third MAC CE; the third MAC CE is a MAC CE used to activate an uplink and downlink joint TCI state; and the third MAC CE includes a measurement result of the second uplink signal.

[0084] In this implementation, the MAC CE used to activate the joint uplink and downlink TCI-state can be enhanced by introducing an additional field to indicate one or more measurement results, which correspond to one or more TCI-states activated by the MACCE, or the reference signal resources in the activated one or more TCI-states.

[0085] In a possible implementation, the MAC CE is a fourth MAC CE; the fourth MAC CE is a MAC CE used to activate an uplink and downlink independent TCI state; and the fourth MAC CE includes a measurement result of the second uplink signal.

[0086] In this implementation, the MAC CE used to activate independent uplink and downlink TCI-states can be enhanced by introducing additional fields to indicate one or more measurement results, which correspond to one or more TCI-states activated by the MAC CE, or the reference signal resources in the activated one or more TCI-states.

[0087] In a third aspect, an embodiment of the present application provides a communication device, which has the function of implementing the first aspect above. For example, the communication device includes a module or unit or means corresponding to performing the operations involved in the first aspect above. The module or unit or means can be implemented by software, hardware, or a combination of software and hardware. The device includes a first transceiver unit and a first processing unit; wherein:

[0088] The first transceiver unit is configured to send a second uplink signal to the second network device; and receive a measurement result of the second uplink signal from the second network device;

[0089] The first processing unit is configured to determine a path loss of the second uplink signal based on a measurement result of the second uplink signal.

[0090] In a possible implementation, the measurement result of the second uplink signal includes one or more of the following:

[0091] received power of the second uplink signal;

[0092] path loss of the second uplink signal;

[0093] a difference between the received power of the second uplink signal and the received power of the first uplink signal;

[0094] a difference between the path loss of the second uplink signal and the path loss of the first uplink signal;

[0095] Among them, the first uplink signal is an uplink signal sent by the terminal device to the first network device.

[0096] In a possible implementation, the measurement result of the second uplink signal is carried in a medium access control MAC control element CE.

[0097] In a possible implementation, the MAC CE is a first MAC CE; the first MAC CE includes a measurement result of the second uplink signal and one or more of the following:

[0098] The index of the second uplink signal;

[0099] The index of the resource set corresponding to the second uplink signal.

[0100] In a possible implementation, there are M second uplink signals; the first MAC CE includes measurement results of K second uplink signals, where K is equal to the number of activated second transmission configuration indication TCI states; or K is equal to the number of different reference signal resources included in the activated second TCI state; and M is greater than or equal to K.

[0101] The second TCI state is an uplink TCI state or an uplink and downlink TCI state corresponding to the second control channel group.

[0102] In one possible implementation, the i-th measurement result among the K measurement results corresponds to the i-th TCI state among the K activated second TCI states; or, the i-th measurement result among the K measurement results corresponds to the reference signal resource in the i-th TCI state among the K activated second TCI states.

[0103] In a possible implementation manner, the MAC CE is a second MAC CE; the second MAC CE is a MAC CE used to activate the TCI state of the control resource group; and the second MAC CE includes a measurement result of the second uplink signal.

[0104] In a possible implementation, the MAC CE is a third MAC CE; the third MAC CE is a MAC CE used to activate an uplink and downlink joint TCI state; and the third MAC CE includes a measurement result of the second uplink signal.

[0105] In a possible implementation, the MAC CE is a fourth MAC CE; the fourth MAC CE is a MAC CE used to activate an uplink and downlink independent TCI state; and the fourth MAC CE includes a measurement result of the second uplink signal.

[0106] In a possible implementation, when the measurement result of the second uplink signal includes the received power of the second uplink signal, in determining the path loss of the second uplink signal based on the measurement result of the second uplink signal, the first processing unit is specifically configured to:

[0107] The path loss of the second uplink signal is determined based on the received power of the second uplink signal and the transmitted power of the second uplink signal.

[0108] In a possible implementation, the first processing unit is further configured to determine the transmit power of the third uplink signal based on the path loss of the second uplink signal;

[0109] The first transceiver unit is further configured to send the third uplink signal to the second network device using the transmission power of the third uplink signal.

[0110] It should be understood that since the method embodiment and the device embodiment are different presentation forms of the same technical concept, the content of the first aspect of the embodiment of the present application should be synchronously adapted to the third aspect of the embodiment of the present application, and can achieve the same or similar beneficial effects, and will not be repeated here.

[0111] In a fourth aspect, an embodiment of the present application provides a communication device, which has the function of implementing the second aspect above. For example, the communication device includes a module, unit, or means corresponding to performing the operations involved in the second aspect above. The module, unit, or means can be implemented through software, hardware, or a combination of software and hardware. The device includes a second transceiver unit and a second processing unit; wherein:

[0112] A second transceiver unit, configured to receive a second uplink signal sent by the terminal device;

[0113] A second processing unit, configured to obtain a measurement result of a second uplink signal;

[0114] The second transceiver unit is also used to send the measurement result of the second uplink signal to the terminal device.

[0115] In a possible implementation, the measurement result of the second uplink signal includes one or more of the following:

[0116] received power of the second uplink signal;

[0117] path loss of the second uplink signal;

[0118] a difference between the received power of the second uplink signal and the received power of the first uplink signal;

[0119] a difference between the path loss of the second uplink signal and the path loss of the first uplink signal;

[0120] Among them, the first uplink signal is an uplink signal sent by the terminal device to the first network device.

[0121] In a possible implementation, the measurement result of the second uplink signal is carried in a medium access control MAC control element CE.

[0122] In a possible implementation, the MAC CE is a first MAC CE; the first MAC CE includes a measurement result of the second uplink signal and one or more of the following:

[0123] The index of the second uplink signal;

[0124] The index of the resource set corresponding to the second uplink signal.

[0125] In a possible implementation, there are M second uplink signals; the first MAC CE includes measurement results of K second uplink signals, where K is equal to the number of activated second transmission configuration indication TCI states; or K is equal to the number of different reference signal resources included in the activated second TCI state; and M is greater than or equal to K.

[0126] The second TCI state is an uplink TCI state or an uplink and downlink TCI state corresponding to the second control channel group.

[0127] In one possible implementation, the i-th measurement result among the K measurement results corresponds to the i-th TCI state among the K activated second TCI states; or, the i-th measurement result among the K measurement results corresponds to the reference signal resource in the i-th TCI state among the K activated second TCI states.

[0128] In a possible implementation manner, the MAC CE is a second MAC CE; the second MAC CE is a MAC CE used to activate the TCI state of the control resource group; and the second MAC CE includes a measurement result of the second uplink signal.

[0129] In a possible implementation, the MAC CE is a third MAC CE; the third MAC CE is a MAC CE used to activate an uplink and downlink joint TCI state; and the third MAC CE includes a measurement result of the second uplink signal.

[0130] In a possible implementation, the MAC CE is a fourth MAC CE; the fourth MAC CE is a MAC CE used to activate an uplink and downlink independent TCI state; and the fourth MAC CE includes a measurement result of the second uplink signal.

[0131] It should be understood that since the method embodiment and the device embodiment are different presentation forms of the same technical concept, the content of the second aspect of the embodiment of the present application should be synchronously adapted to the fourth aspect of the embodiment of the present application, and can achieve the same or similar beneficial effects, and will not be repeated here.

[0132] In the fifth aspect, an embodiment of the present application provides a communication device, comprising a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and are configured to cooperate with the communication interface when executed by the processor to implement the method in any one of the embodiments of the first or second aspect above.

[0133] In one possible design, the communication device may further include an interface circuit, wherein the processor is configured to communicate with other devices or components through the interface circuit.

[0134] In a sixth aspect, an embodiment of the present application provides a chip, comprising: a processor for calling and running a computer program from a memory, so that a device equipped with the chip executes a method as in any one of the embodiments of the first or second aspect above.

[0135] In the seventh aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program for execution by a device, and when the computer program is executed, it implements the method in any one of the embodiments of the first aspect or the second aspect mentioned above.

[0136] In an eighth aspect, an embodiment of the present application provides a computer program product. When the computer program product is run by a communication device, the communication device executes a method in any one of the embodiments of the first or second aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0137] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0138] Figure 1 A schematic diagram of a transmission scenario with two TRPs;

[0139] Figure 2 is a schematic diagram for determining path loss;

[0140] Figure 3 A schematic diagram of a system architecture provided in an embodiment of the present application;

[0141] Figure 4 A schematic diagram of an ORAN architecture provided in an embodiment of the present application;

[0142] Figure 5 A schematic diagram of the network element function division and protocol layer structure of an ORAN device provided in an embodiment of the present application;

[0143] Figure 6 A flow chart of a communication method provided in an embodiment of the present application;

[0144] Figure 7A A schematic diagram of the format of a MAC CE provided in an embodiment of the present application;

[0145] Figure 7B A flowchart of another communication method provided in an embodiment of the present application;

[0146] Figure 8 A flowchart of another communication method provided in an embodiment of the present application;

[0147] Figure 9 A schematic diagram of another MAC CE format provided in an embodiment of the present application;

[0148] Figure 10 A schematic diagram of another MAC CE format provided in an embodiment of the present application;

[0149] Figure 11 A schematic diagram of another MAC CE format provided in an embodiment of the present application;

[0150] Figure 12 A schematic diagram of another MAC CE format provided in an embodiment of the present application;

[0151] Figure 13 A schematic diagram of another MAC CE format provided in an embodiment of the present application;

[0152] Figure 14 A schematic diagram of another MAC CE format provided in an embodiment of the present application;

[0153] Figure 15 A flowchart of another communication method provided in an embodiment of the present application;

[0154] Figure 16A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0155] Figure 17 A schematic structural diagram of another communication device provided in an embodiment of the present application;

[0156] Figure 18 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0157] Figure 19 A schematic diagram of the structure of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0158] The terms "first," "second," "third," and "fourth," etc., in the specification and claims of this application and the accompanying drawings are used to distinguish different objects, not to describe a specific order. In addition, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0159] References to "embodiments" herein mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0160] As used in this specification, the terms "component", "module", "system", etc. are used to represent computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program and / or a computer. By way of illustration, both an application running on a terminal device and a terminal device can be a component. One or more components can reside in a process and / or an execution thread, and a component can be located on a computer and / or distributed between two or more computers. In addition, these components can be executed from various computer-readable media having various data structures stored thereon. Components can communicate, for example, through local and / or remote processes based on signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system and / or a network, such as the Internet interacting with other systems via signals).

[0161] First, a brief introduction to the relevant terms and related technical background in this application is given to facilitate understanding by those skilled in the art.

[0162] (1) Angle of arrival: angle of arrival, AOA;

[0163] (2) Acknowledgement, ACK;

[0164] (3) User Equipment: User Equipment, UE;

[0165] (4) Beam pair link: Beam pair link, BPL;

[0166] (5) Demodulation Reference Signal: DMRS;

[0167] (6) Channel status information reference signal: Channel status information reference signal, CSI-RS;

[0168] (7) Channel Quality Indicator (CQI);

[0169] (8) Downlink Control Information: DCI;

[0170] (9) Enhanced Mobile Broadband: eMBB;

[0171] (10) Frequency division duplex, FDD;

[0172] (11) Fast Fourier Transform: Fast Fourier Transform, FFT;

[0173] (12) Hybrid Automatic Repeat reQuest (HARQ)

[0174] (13) Inverse Fast Fourier Transform: Inverse Fast Fourier Transform, IFFT;

[0175] (14) Long Term Evolution (LTE);

[0176] (15) Medium Access Control: MAC;

[0177] (16) Negative-acknowledgement, NACK;

[0178] (17) New Radio, NR;

[0179] (18) Orthogonal frequency divided multiplexing, OFDM;

[0180] (19) Physical broadcast channel: PBCH;

[0181] (20) Primary component carrier, PCC;

[0182] (21) Physical Uplink Shared Channel: PUSCH;

[0183] (22) Physical Uplink Control Channel: PUCCH;

[0184] (23) Physical Downlink Control Channel: PDCCH;

[0185] (24) Physical Downlink Shared Channel: PDSCH;

[0186] (25) Reference Signals, RS;

[0187] (26) Precoding Matrix Indicator: PMI;

[0188] (27) Phase noise compensation reference signal: Phase noise compensation reference signal, PRCS;

[0189] (28) Power spectrum density: Power spectrum density, PSD;

[0190] (29) Primary synchronization signal: PSS;

[0191] (30) Phase Tracking Reference Signal: PTRS;

[0192] (31) Quasi-co-location: QCL;

[0193] (32) Random access channel: Random access channel, RACH;

[0194] (33) Resource block: Resource block, RB;

[0195] (34) Resource element: Resource element, RE;

[0196] (35) Resource element group: Resource element group, REG;

[0197] (36) Radio frequency: RF;

[0198] (37) Channel rank indicator: RI;

[0199] (38) Radio Link Failure: RLF;

[0200] (39) Radio Link Monitoring (RLM);

[0201] (40) Radio Network Temporary Identifier (RNTI);

[0202] (41) Reference signal receiving power: RSRP;

[0203] (42) Reference signal receiving quality: Reference signal receiving quality, RSRQ;

[0204] (43) Radio resource control: RRC;

[0205] (44) Redundant version: RV;

[0206] (45) Sounding reference signal: SRS;

[0207] (46) Synchronization signal: synchronization signal, SS;

[0208] (47) Secondary synchronization signal: Secondary synchronization signal, SSS;

[0209] (48) Synchronization Signal and PBCHBlock, SSB;

[0210] (49) Timing advance: TA;

[0211] (50) Timing advance group: TAG;

[0212] (51) Transport block: TB;

[0213] (52) Transmission Configuration Indicator (TCI);

[0214] (53) Uplink Control Information: UCI;

[0215] (54) Bandwidth part: BWP;

[0216] (55) Beam: A beam refers to a special directional transmission or reception effect formed by the transmitter or receiver of a network device or terminal device through an antenna array, just like a flashlight converges light in one direction to form a beam. Sending and receiving signals in the form of a beam can effectively increase the transmission distance of the signal. The beam can be a wide beam, a narrow beam, or other types of beams. The technology for forming the beam can be beamforming technology or other technologies. The beamforming technology can specifically be digital beamforming technology, analog beamforming technology, or hybrid digital / analog beamforming technology. Beams generally correspond to resources. For example, when performing beam measurement, the network device measures different beams through different resources, and the terminal device feeds back the measured resource quality, so that the network device knows the quality of the corresponding beam. During data transmission, beam information is also indicated by its corresponding resource. For example, the network device indicates a TCI state (TCI-state) through the TCI field in the DCI, and the terminal device determines the beam to use to determine data based on the reference resource contained in the TCI-state.

[0217] In the communication protocol, the beam can be specifically characterized as a digital beam, an analog beam, a spatial domain filter, a spatial filter, a spatial parameter, TCI, a TCI-state, etc. The beam used to send a signal can be called a transmission beam (or Tx beam), a spatial domain transmission filter, a spatial transmission filter, a spatial domain transmission parameter, a spatial transmission parameter, etc. The beam used to receive a signal can be called a reception beam (or Rx beam), a spatial domain reception filter, a spatial reception filter, a spatial domain reception parameter, a spatial reception parameter, etc. In this application, the term beam is used for explanation, but it should be understood that the beam in this application can be replaced by other equivalent concepts and is not limited to the concepts mentioned above.

[0218] (56) Resources: In the communication protocol, RS is configured in the form of resources. The network equipment will configure each RS to the terminal device in the form of resources. A resource is a configuration information unit, which usually includes an RS-related parameter, such as the RS's time-frequency resource location, number of ports, time domain type (periodic / semi-static / non-periodic), etc. Resources can be uplink signal resources or downlink signal resources. Uplink signals include but are not limited to: SRS, DMRS. Downlink signals include but are not limited to: CSI-RS, cell specific reference signal (CS-RS), UE specific reference signal (US-RS), DMRS, SSB (also referred to as synchronization signal block).

[0219] (57) TCI-state: The network device uses TCI-state to indicate information such as the beam and path loss measurement resources used for uplink transmission. Specifically, TCI-state includes a reference signal resource used as a beam reference. The uplink transmission using this TCI-state should use the beam corresponding to the reference signal resource for the uplink transmission. TCI-state also includes a reference signal resource for determining the path loss. The uplink transmission using this TCI-state should use the path loss corresponding to the reference signal resource for the uplink transmission. TCI-state is divided into uplink TCI-state (specially used for uplink transmission), downlink TCI-state (specially used for downlink transmission), and uplink and downlink combined TCI-state (can be used for uplink and downlink transmission). Unless otherwise specified in this application, TCI-state refers to uplink TCI-state and / or uplink and downlink combined TCI-state.

[0220] In mobile communication systems, uplink transmission refers to the transmission of signals from a terminal device to a network device. Downlink transmission refers to the transmission of downlink signals from a network device to a terminal device. Because the transmit power of a terminal device is generally lower than that of the network device, the signal strength of uplink transmission is generally lower than that of downlink transmission. This results in some terminal devices having good downlink performance but poor uplink performance. One approach to addressing this issue is to deploy low-cost uplink-only network devices. If such network devices are nearby, terminal devices can use these devices for uplink transmission, thereby improving uplink performance.

[0221] The transmission and receiving point (TRP) is a network device located on the network side of the communication system, and is a device or module with corresponding communication functions. The TRP is usually provided with a communication module, circuit or chip that performs the corresponding communication function. The TRP is also configured with program instructions for performing the corresponding communication function and the corresponding program instructions. Exemplarily, the TRP in the embodiment of the present application may be a RAN device or network element deployed in a radio access network (RAN). For example, the TRP may be a RAN device or a device that can support the RAN device to implement the function, such as a chip system or a combination device or component that can implement the function of the access network device, and the device can be installed in the RAN device.

[0222] like Figure 1 As shown in the figure, TRP1 is a TRP with both uplink and downlink capabilities, while TRP2 is a TRP with only uplink capabilities. TRP2 is closer to the terminal device. When the terminal device communicates through TRP1, the downlink signal quality is good, but the uplink signal quality is poor. In this case, the terminal device can further establish a connection with TRP2 and perform joint uplink transmission based on TRP1 and TRP2. That is, the terminal device can transmit uplink signals to both TRP1 and TRP2 to improve its uplink transmission performance.

[0223] Alternatively, conversely, TRP1 is a TRP with only uplink functionality, and TRP2 is a TRP with both uplink and downlink functionality. That is, the first and second in this application are merely used to distinguish, and do not define the order or size relationship. The first and second in this application can also be interchanged, i.e., the first can be replaced by the second, and the second can be replaced by the first.

[0224] Transmission of uplink signals by a terminal device to TRP1 and TRP2 may be referred to as uplink multi-TRP transmission. Uplink multi-TRP transmission includes one or more of the following transmission modes. Unless otherwise specified, the method of the present application is applicable to scenarios corresponding to any of the following modes.

[0225] Mode 1: The terminal device transmits the same data to two TRPs at different times. The network side improves the signal strength of the data by combining the same data signals received by the two TRPs.

[0226] Mode 2: The terminal device transmits the same data to two TRPs at the same time. The network side improves the signal strength of the data by combining the same data signals received by the two TRPs.

[0227] Mode 3: The terminal device transmits different data or different data streams of the same data to two TRPs at the same time, thereby increasing the amount of uplink transmission data and improving uplink transmission performance.

[0228] In uplink transmission, the terminal device needs to determine the transmission power of the uplink signal sent to the network device, and this transmission power is usually calculated based on the path loss of the signal transmission between the terminal device and the network device. In related technologies, the terminal device obtains the path loss of the downlink signal sent to it by the network device (i.e., the path loss between the terminal device and the network device). Figure 2 As shown, the network device uses a specific transmit power x (the network device indicates the transmit power to the terminal device in advance, in decibel milliwatts dBm) to send a path loss measurement reference signal to the terminal device. The terminal device measures the received power y (in dBm) of the path loss measurement reference signal. The terminal device uses the transmit power x of the path loss measurement reference signal minus the received power y of the path loss measurement reference signal to obtain the path loss xy (in decibels dB) between the terminal device and the network device. It should be understood that for the same terminal device and network device, the path loss of the uplink transmission and the path loss of the downlink transmission are the same. Therefore, the terminal device can obtain the path loss experienced by the uplink transmission by measuring the downlink signal.

[0229] In the related art, the terminal device obtains the path loss between the terminal device and the network device by measuring the downlink signal of the network device, and then determines the transmission power of the uplink signal based on the path loss. Figure 1 In the scenario shown, TRP2 does not have a downlink function and cannot send downlink signals. Therefore, measuring the path loss between the network device and the terminal device using the downlink signal is not applicable.

[0230] In order to overcome the defects and shortcomings of the related art, this application provides a communication method that can be applied to Figure 3 In the system architecture shown in Figure 3 As shown, the system architecture includes multiple network devices and at least one terminal device, and the multiple network devices can simultaneously transmit data or control signaling to a single terminal device.

[0231] Network equipment includes various types of base stations, such as macro base stations, micro base stations (also known as small cells), relay stations, and access points. In systems using different wireless access technologies, the names of devices with base station functions may vary. For example, in 5G systems, they are called gNBs; in LTE systems, they are called evolved NodeBs (eNBs or eNodeBs); in third-generation (3G) systems or Wideband Code Division Multiple Access (WCDMA), they are called Node Bs; in Global System for Mobile Communication (GSM) or Code Division Multiple Access (CDMA) networks, they are called Base Transceiver Stations (BTSs). Network equipment may also be wireless controllers in Cloud Radio Access Network (CRAN) scenarios, base stations in future 5G networks, related equipment used to implement network-side functions in future evolved Public Land Mobile Networks (PLMNs), or Transceiver Stations (TRPs).

[0232] In some deployments, the network device may also be an antenna unit (radio unit, RU), an open radio access network (openradio access network, ORAN) architecture, etc. The embodiments of the present application do not limit the deployment method of the network device. For example, see Figure 4 , Figure 4 A schematic diagram of an ORAN architecture provided in an embodiment of the present application is shown as follows: Figure 4 As shown, the ORAN architecture includes core network (CN) equipment, radio access network (RAN) equipment, and UE. The RAN equipment communicates with the CN equipment through the backhaul link and communicates with the UE through the air interface. Specifically, the baseband unit (BBU) in the RAN equipment communicates with the CN through the backhaul link, the radio unit (RU) in the RAN equipment communicates with at least one UE through the air interface, and the BBU communicates with at least one RU through the fronthaul link. Among them, the BBU and RU can be co-located or not.

[0233] Exemplarily, a BBU includes at least one Control Unit (CU) and at least one Distributed Unit (DU), which can communicate via at least one midhaul link. In other deployments, the CU can also be divided into the CU-control plane (CP) and the CU-user plane (UP).

[0234] For example, in an ORAN architecture, the network device shown in the embodiments of the present application may be a RAN device in the ORAN, or a module in the RAN device. In the ORAN architecture, CU may also be referred to as an open (O)-CU, DU may also be referred to as an O-DU, CU-CP may also be referred to as an O-CU-CP, CU-UP may also be referred to as an O-CU-UP, and RU may also be referred to as an O-RU.

[0235] In some deployments, network equipment may be referred to as ORAN equipment. For example, see Figure 5 , Figure 5 A schematic diagram of the network element function division and protocol layer structure of an ORAN device provided in an embodiment of the present application is shown in FIG. Figure 5 As shown, the CU is a logical node that carries the RRC layer, the Service Data Adaptation Protocol (SDAP) layer, the Packet Data Convergence Protocol (PDCP) layer, and other control functions. The CU is connected to network nodes such as the CN through some interfaces, which may be E2 interfaces, etc. Optionally, the CU may have some functions of the CN. The CU (such as the PDCP layer and higher layers) is connected to the DU (such as the Radio Link Control (RLC) layer, the MAC layer, and the higher-level physical (PHY) layer) through some interfaces, which may be F1 interfaces, etc. In some examples, these interfaces (such as the F1 interface) can provide control plane and user plane functions (such as interface management, system information management, UE context management, RRC message transmission, etc.). The F1 Application Protocol (AP) is the application protocol of the F1 interface, which defines the signaling process of F1 in some examples. The F1 interface supports the control plane F1-C and the user plane F1-U.

[0236] In some deployments, the CU can be split into the CU-CP and the CU-UP. The CU-CP can interact with network elements in the CN that implement control plane functions. The CU-CP is a logical node that carries the RRC layer and the PDCP-C (Control plane part of PDCP) layer and is used to implement the control plane functions of the CU. The CU-CP can interact with network elements in the CN that implement control plane functions. The network elements in the CN that implement control plane functions can be access and mobility function network elements, such as the Access and Mobility Management Function (AMF) network element in the 5G system. The AMF network element is responsible for mobility management in the mobile network, such as location update of terminal devices, registration of terminal devices with the network, and handover of terminal devices. The CU-UP is a logical node that carries the SDAP layer and the PDCP-U (User plane part of PDCP) layer and is used to implement the user plane functions of the CU. The CU-UP can interact with network elements in the CN that implement user plane functions. Network elements in the CN that implement user plane functions, such as the User Plane Function (UPF) network element in the 5G system, are responsible for forwarding and receiving data in terminal devices.

[0237] In some deployments, the DU is the logical node that hosts the RLC layer, MAC layer, higher-level PHY layer, and other functions. In some examples, the DU can control at least one RU. The DU is connected to the RU via some interfaces, which can be fronthaul interfaces. In some examples, the higher-level PHY layer includes parts of the PHY layer processing, such as forward error correction (FEC) encoding and decoding, scrambling, modulation, and demodulation.

[0238] In some deployments, the RU is the logical node that carries the low-level PHY and RF processing. In some examples, the RU can be a TRP or Remote Radio Head (RRH) in 3GPP, or other similar functional entity. In some examples, the low-level PHY includes parts of the PHY processing, such as FFT, IFFT, digital beamforming, and filtering. The RU communicates with one or more UEs over a wireless link. The DU and RU can be co-located or not.

[0239] The DU and RU exchange control plane information and user plane information via the Lower-Layer Split-Control (C), User (U), and Synchronization (S) (LLS-CUS) interface over the fronthaul link. The LLS-CUS may include an LLS-C interface and an LLS-U interface that provide CP and UP, respectively. In some examples, CP refers to real-time control between the DU and RU. The DU and RU exchange management information via the LLS-M interface of the fronthaul link. The management plane (M-Plane) refers to non-real-time management operations between the DU and RU.

[0240] The DU and RU can work together to implement the functions of the PHY layer. A DU can be connected to one or more RUs. The functions of the DU and RU can be configured in various ways according to the design. For example, the DU is configured to implement the baseband function, and the RU is configured to implement the mid-RF function. For another example, the DU is configured to implement the high-layer functions in the PHY layer, and the RU is configured to implement the low-layer functions in the PHY layer or to implement the low-layer functions and RF functions. The high-layer functions in the PHY layer may include a part of the functions of the PHY layer, which is closer to the MAC layer, and the low-layer functions in the PHY layer may include another part of the functions of the PHY layer, which is closer to the mid-RF side.

[0241] It should be noted that the above configuration of CU and DU is only an example, and the functions of CU and DU can also be configured as needed. For example, CU or DU can be configured to have the functions of more protocol layers, or CU or DU can be configured to have partial processing functions of the protocol layer. For example, some functions of the RLC layer and the functions of the protocol layers above the RLC layer are set in the CU, and the remaining functions of the RLC layer and the functions of the protocol layers below the RLC layer are set in the DU. For another example, the functions of CU or DU can be divided according to service type or other system requirements, such as by delay, and the functions whose processing time needs to meet the smaller delay requirement are set in the DU, and the functions that do not need to meet the delay requirement are set in the CU.

[0242] For ease of description, this application may refer to both "network devices" and "sites." A site is a transmission node located at a specific physical location. Network devices can be understood as a general term for all network-side devices (including sites). For example, multiple sites can be collectively referred to as network devices. In other words, network devices in this application conceptually include sites.

[0243] Among them, terminal devices may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem. Terminal devices can be mobile stations (MS), subscriber units, cellular phones, smartphones, wireless data cards, personal digital assistants (PDAs), tablet computers, wireless modems, handheld devices, laptop computers, machine type communication (MTC) terminals, etc. The terminal devices are usually equipped with communication modules, circuits, or chips that perform corresponding communication functions. The terminal devices are also configured with program instructions for performing corresponding communication functions.

[0244] The technical solution provided in this application is introduced in detail below in conjunction with specific implementation methods.

[0245] See Figure 6 , Figure 6 A flow chart of a communication method provided in an embodiment of the present application, which can be based on Figure 3 or Figure 4 The architecture shown is implemented as Figure 6 As shown, the method includes steps 601-604:

[0246] 601: The terminal device sends a second uplink signal to the second network device.

[0247] In the embodiment of the present application, the second uplink signal may be an SRS, a PUCCH signal, a PUSCH signal, a physical random access channel (PRACH) signal, a DMRS, a PTRS or other uplink signal. Among them, the SRS may be an SRS for beam management, or an SRS for uplink transmission based on a codebook, or an SRS for uplink transmission based on a non-codebook, or an SRS for antenna selection. Among them, the second network device may be Figure 1 TRP2 in the scenario shown.

[0248] The terminal device may use a second transmit power to transmit the second uplink signal. The second transmit power may be a transmit power configured by the network device, or a transmit power specified by the protocol. The transmit power specified by the protocol may be a fixed value, or a maximum transmit power allowed by the protocol, or a value based on the relationship between the terminal and the first network device (e.g., Figure 1The second transmission power is the transmission power obtained by calculating the path loss between the terminal device and the second network device in the scenario shown. The second transmission power can also be the transmission power obtained by calculating the path loss between the terminal device and the second network device. Alternatively, different second transmission powers can be specified under different conditions. For example, when the terminal device has not yet obtained the path loss information corresponding to the previous uplink signal, the second uplink signal is sent using the transmission power configured by the network device or the transmission power specified by the protocol. When the terminal device has obtained the path loss information corresponding to the previous uplink signal, the transmission power of the second uplink signal is calculated using the path loss.

[0249] It should be noted that the path loss between the terminal device and the network device will change as the terminal device moves. Therefore, even if the terminal device has previously determined the path loss between it and the network device, the terminal device needs to periodically send an uplink signal to re-determine the value of the path loss between it and the network device.

[0250] Optionally, the terminal device may inform the second network device of information about the transmit power used by the second uplink signal. The information about the transmit power used by the second uplink signal may refer to the transmit power value used by the second uplink signal; or a change in the transmit power value used by the second uplink signal, such as a change in the transmit power value relative to the transmit power used for sending a fourth uplink signal, where the fourth uplink signal is an uplink signal sent by the terminal device to the second network device prior to the second uplink signal.

[0251] Specifically, the terminal device may inform the second network device of the information about the transmit power adopted by the second uplink signal through special uplink signaling. The uplink signaling may be RRC signaling, MAC control element (CE) signaling or UCI signaling. The terminal device may also implicitly indicate the information about the transmit power of the second uplink signal through the signal characteristics of the second uplink signal. For example, the information about the transmit power of the second uplink signal may be indicated by the characteristics of the sequence adopted by the second uplink signal. The characteristics of the sequence adopted by the second uplink signal may be sequence cyclic shift, phase offset, or other characteristics, which are not limited in this application.

[0252] There are M second uplink signals, where M is greater than or equal to 1, that is, it is not limited to whether the second uplink signal is a single uplink signal or multiple uplink signals.

[0253] For example, the terminal device may send an uplink signal to a single network device, such as Figure 1 The terminal device can also send uplink signals to multiple network devices, such as Figure 1 TRP1 in the Figure 1 TRP2 in sends the second uplink signal.

[0254] The terminal device may use a first transmission power to transmit the first uplink signal. The first transmission power may be a transmission power configured by the network device, or a transmission power specified by the protocol. The transmission power specified by the protocol may be a fixed value, or a maximum transmission power allowed by the protocol, or a value based on the relationship between the terminal and the second network device (e.g., Figure 1 The first transmit power is the transmit power calculated based on the path loss between the terminal device and the first network device. Alternatively, different first transmit powers may be used under different conditions. For example, when the terminal device has not yet obtained the path loss information corresponding to the previous uplink signal, the first uplink signal is sent using the transmit power configured by the network device or the transmit power specified by the protocol. When the terminal device has obtained the path loss information corresponding to the previous uplink signal, the transmit power of the first uplink signal is calculated using the path loss.

[0255] 602: The second network device obtains a measurement result of a second uplink signal.

[0256] Correspondingly, the second network device receives the second uplink signal. After receiving the second uplink signal, the second network device measures the second uplink signal to obtain a measurement result.

[0257] Exemplarily, the measurement result of the second uplink signal may include one or more of the following:

[0258] The received power of the second uplink signal, such as RSRP;

[0259] path loss of the second uplink signal;

[0260] a difference between the received power of the second uplink signal and the received power of the first uplink signal;

[0261] a difference between the path loss of the second uplink signal and the path loss of the first uplink signal;

[0262] a change in the received power of the second uplink signal relative to the received power of the fourth uplink signal;

[0263] A change in the path loss of the second uplink signal relative to the path loss of the fourth uplink signal.

[0264] For example, the terminal device sends one or more SRSs to TRP2, and the measurement result of the second uplink signal is the RSRP of the one or more SRSs, or the path loss corresponding to the one or more SRSs. For example, the terminal device sends one SRS to TRP1 and one SRS to TRP2, and the measurement result of the second uplink signal is the RSRP, path loss, RSRP difference, or path loss difference of the two SRSs. For another example, the terminal device sends one SRS to TRP1 and M SRSs to TRP2, and the measurement result of the second uplink signal is the RSRP or path loss of the M+1 SRSs, or the RSRP difference or path loss difference between the M SRSs sent to TRP2 and the one SRS sent to TRP1.

[0265] In this implementation, the second network device can directly indicate the path loss of the second uplink signal to the terminal device, or it can indicate the calculation parameters of the path loss of the second uplink signal (such as RSRP, RSRP difference, path loss difference, etc.) to the terminal device, so that the terminal device can determine the path loss of the second uplink signal based on these calculation parameters.

[0266] 603: The second network device sends the measurement result of the second uplink signal to the terminal device.

[0267] The second network device may send the measurement result through the first network device. In an embodiment of the present application, the second network device notifies the terminal device of the measurement result of the second uplink signal through indication information. The indication information may be RRC signaling, MACCE signaling, or DCI signaling. The measurement result of the second uplink signal may also be simply described as the second information, that is, the measurement result of the second uplink signal in the present application may be replaced by the second information corresponding to the second uplink signal.

[0268] Exemplarily, a possible manner in which the second network device sends the second information corresponding to the second uplink signal to the terminal device is: using a dedicated MAC CE (hereinafter referred to as the first MAC CE) to indicate the second information.

[0269] Exemplarily, the first MAC CE includes one or more of the following:

[0270] The index of the second uplink signal; for example, the second uplink signal is an SRS, and the first MACCE includes the index of the SRS. The first MACCE may include K SRS indexes, where K is greater than or equal to 1.

[0271] The index of the resource set corresponding to the second uplink signal; for example, the index of the SRS resource set.

[0272] The index of the second TCI-state.

[0273] The second information corresponding to the second uplink signal may be one or more of the following: the path loss of the second uplink signal, the RSRP of the second uplink signal, the path loss difference between the second uplink signal and the first uplink signal, the RSRP difference between the second uplink signal and the first uplink signal, the change in RSRP of the second uplink signal, the change in the path loss of the second uplink signal, the change in the path loss difference between the second uplink signal and the first uplink signal, and the change in RSRP difference between the second uplink signal and the first uplink signal. The first uplink signal is an uplink signal sent by the terminal device to the first network device.

[0274] The number K of second information corresponding to the second uplink signal, that is, the MAC CE includes at least one second information corresponding to the second uplink signal.

[0275] To save MAC-CE overhead, the second information and the TCI-state index corresponding to the second information or the resource index of the second uplink signal corresponding to the second information may be carried in the same byte. That is, each byte in the second MAC-CE carries a TCI-state index corresponding to the second information or a resource index of the second uplink signal corresponding to the second information.

[0276] like Figure 7A As shown, Figure 7A A schematic diagram of a first MACCE provided in an embodiment of the present application, wherein the first MACCE may include a control resource set pool indicator (CORESET PooI ID) field, a serving cell indicator field (Servingcell ID) and a downlink portion bandwidth indicator (DL BWP ID) field. The first MACCE may also include K bytes for indicating the second information corresponding to K second uplink signals. It should be understood that Figure 7A This is only an example of the first MACCE and does not limit the format of the first MACCE.

[0277] In this implementation, the second network device may place K pieces of second information corresponding to the K second uplink signals into a first MACCE, and indicate the K pieces of second information to the terminal device via the first MACCE, thereby facilitating the terminal device to obtain the path loss of the second uplink signal based on the second information. In addition, the indexes of the K second uplink signals and / or the indexes of the resource sets corresponding to the second uplink signals may be placed in the first MACCE to indicate the second uplink signal corresponding to the second information, or the resource set to which the second uplink signal corresponding to the second information belongs.

[0278] Here, M is greater than or equal to K. That is, the second information corresponding to the second uplink signal may be the second information corresponding to all M second uplink signals, or may be the second information corresponding to some of the M second uplink signals. The part of the second uplink signal may be a better SRS in the activated second TCI-state.

[0279] The second TCI-state is the uplink TCI-state corresponding to the second control channel group. The second control channel group is a control channel group with a control channel group index (coresetPoolIndex) of 1. The second TCI-state can also be used as a TCI-state for transmission with a second network device. For example, the network device activates multiple groups of TCI-states for the terminal device, each group of TCI-states corresponding to a TCI field value. Each group of TCI-states may include one or two uplink TCI-states, of which the second uplink TCI-state is the second TCI-state.

[0280] The uplink TCI-state in this application generally refers to the TCI-state used for uplink transmission, which may specifically be an uplink TCI-state used only for uplink transmission, or an uplink and downlink combined TCI-state used for uplink and downlink transmission.

[0281] The number K of the second information included in the first MAC-CE may be determined by a preset rule in addition to being directly indicated by the first MAC-CE.

[0282] Exemplarily, K is equal to the number of second TCI-states activated by the network device for the terminal device. In this case, the K second information correspond one-to-one to the K second TCI-states. For example, the i-th second information in the K second information corresponds to the i-th second TCI-state in the K activated second TCI-states. For example, the i-th second information in the above second information corresponds to the i-th second TCI-state in the K activated second TCI-states. In other words, the i-th second information in the above K second information corresponds to the reference signal resource in the i-th second TCI-state in the K activated second TCI-states. Among them, the i-th second TCI-state in the K activated second TCI-states refers to the i-th second TCI-state according to the order of the activated second TCI-states. The order of the activated second TCI-states refers to the order of the activated second TCI-states in the activation signaling, or the order of the TCI field values corresponding to the activated second TCI-states. Furthermore, it may be stipulated that if the second TCI-states corresponding to multiple TCI field values are the same, the same second TCI-states are not counted repeatedly. That is, the above-mentioned K second TCI-states are K different second TCI-states.

[0283] The reference signal resource refers to the SRS indicated in the TCI-state for beam reference or path loss reference.

[0284] Exemplarily, K is equal to the number of different reference signal resources included in the activated second TCI-state. For example, 8 second TCI-states are currently activated, and each second TCI-state includes a reference signal resource. Some of these reference signal resources are repeated, that is, the reference signal resources included in some second TCI-states are the same. In this case, the same reference signal resources are not counted repeatedly, and only different reference signal resources are counted. In this case, the i-th second information in the above-mentioned K second information corresponds to the i-th reference SRS in the K reference SRSs. The i-th reference SRS refers to the i-th reference SRS according to the sorting of the K reference SRSs. The sorting of the K reference SRSs is determined according to the sorting of the currently activated second TCI-state. The sorting of the activated second TCI-state refers to the sorting of the activated second TCI-state in the activation signaling, or the size order of the TCI field values corresponding to the activated second TCI-state. Determining the order of the K SRSs according to the order of the currently activated second TCI-state means that according to the order of the currently activated second TCI-state, the reference SRS in the second TCI-state that comes first is ordered first, and the reference SRS in the second TCI-state that comes later is ordered later. If a reference SRS has already appeared in the previous second TCI-state, it is ignored and not ordered. For example, the indexes of the reference SRSs included in the 8 currently activated TCI-states are {#1, #2, #1, #3, #2, #4, #1, #6}, respectively, then K=5, and the order of the K=5 reference SRSs is #1, #2, #3, #4, #6. Among them, the reference signal resource refers to the SRS indicated in the TCI-state for beam reference or path loss reference.

[0285] In this implementation, the number K of second information corresponding to the second uplink signal in the first MAC CE may be equal to the number of activated second TCI-states, or may be equal to the number of different reference signal resources included in the activated second TCI-state, so that the second network device can indicate the reference signal resources in the activated second TCI-state to the terminal device. The i-th second information among the K second information in the first MAC CE corresponds to the i-th TCI-state among the K activated second TCI-states or the reference signal resources in the i-th second TCI-state among the K activated second TCI-states.

[0286] It should be noted that, when the second network device does not have a downlink function, the second network device may inform the terminal device of the second information corresponding to the second uplink signal through other network devices (such as the first network device) with which a communication link is established.

[0287] 604: The terminal device determines the path loss of the second uplink signal based on the second information corresponding to the second uplink signal.

[0288] Correspondingly, the terminal device receives the measurement result of the second uplink signal from the second network device.

[0289] Exemplarily, when the second information corresponding to the second uplink signal includes the RSRP of the second uplink signal (that is, the second network device indicates the RSRP of the second uplink signal through indication information), the terminal device may determine the path loss of the second uplink signal based on the RSRP of the second uplink signal and the transmit power of the second uplink signal. For example, the second uplink signal is K SRSs, and the second network device indicates the RSRP of the K SRSs. The terminal device uses the transmit power (in dBm) of the K SRSs, subtracts the RSRP (in dBm) of the K SRSs, and obtains the path loss (in dB) corresponding to the K SRSs.

[0290] In this implementation, when the second network device informs the terminal device of the RSRP of the second uplink signal, the terminal device can obtain the path loss of the second uplink signal based on the RSRP and transmit power of the second uplink signal, and thus can determine the transmit power of the next uplink signal based on the path loss.

[0291] Exemplarily, when the second information corresponding to the second uplink signal includes the path loss of the second uplink signal (i.e., the second network device indicates the path loss of the second uplink signal through indication information), the terminal device receives the indication information and can determine the path loss corresponding to the second uplink signal. If the information on the path loss indicated by the indication information is the change in path loss, the terminal device updates the path loss of the second uplink signal based on the change in path loss. For example, the second uplink signal is K SRSs, and the second network device indicates the change in path loss of the K SRSs. The terminal device uses the change in path loss of the K SRSs to update the path loss value of the K SRSs.

[0292] Exemplarily, when the second information corresponding to the second uplink signal includes the RSRP difference corresponding to the second uplink signal (i.e., the second network device indicates the RSRP difference corresponding to the second uplink signal through indication information), the terminal device jointly determines the path loss value of the second uplink signal based on the RSRP difference, the transmit power of the second uplink signal and the transmit power of the first uplink signal sent to the first network device, and the path loss between the terminal device and the first network device. The path loss between the terminal device and the first network device can be obtained by measuring the downlink signal of the first network device by the terminal device. Assume that the path losses between the terminal device and TRP1 and TRP2 are denoted as PL1 and PL2 respectively, the transmit power of the first uplink signal sent to TRP1 and the transmit power of the second uplink signal are P1 and P2 respectively, and the RSRP difference corresponding to the second uplink signal is RSRP gap , the path loss PL2 corresponding to the second uplink signal satisfies:

[0293] PL2=PL1+P2-P1-RSRP gap

[0294] The RSRP difference corresponding to the second uplink signal refers to a difference between the RSRP of the second uplink signal and the RSRP of the first uplink signal.

[0295] The above is a method for calculating the path loss of one second uplink signal. The path losses of multiple second uplink signals can be obtained in the same way.

[0296] Exemplarily, when the second information corresponding to the second uplink signal includes the path loss difference corresponding to the second uplink signal (i.e., the second network device indicates the path loss difference corresponding to the second uplink signal through indication information), the terminal device determines the path loss value of the second uplink signal based on the path loss difference and the path loss with the first network device. The path loss with the first network device can be obtained by the terminal device measuring the downlink signal of the first network device. Assume that the path loss difference corresponding to the second uplink signal is PL gap , the path loss PL2 corresponding to the first uplink signal satisfies:

[0297] PL2=PL1+PL gap

[0298] The above is a method for calculating the path loss of one second uplink signal. The path losses of multiple second uplink signals can be obtained in the same way.

[0299] As can be seen, in the embodiments of the present application, the terminal device can transmit an uplink signal to the network device, which measures the uplink signal and transmits the second information to the terminal device. This allows the terminal device to obtain the path loss between the terminal device and the network device based on the second information transmitted by the network device. Regardless of whether the network device has downlink functionality, the path loss between the terminal device and the network device can be obtained in this manner, improving the applicability of the solution.

[0300] For example, see Figure 7B , Figure 7B A flow chart of another communication method provided in an embodiment of the present application is shown as follows: Figure 7B As shown, in Figure 6 Based on the embodiment shown, the method may further include:

[0301] 605: The terminal device determines the transmission power of the third uplink signal.

[0302] Specifically, the terminal device first determines the TCI-state used by the third uplink signal, determines which of the above-mentioned second uplink signals the reference signal resource in the TCI-state is, and then uses the path loss corresponding to the second uplink signal to calculate the transmission power corresponding to the third uplink signal.

[0303] 606: The terminal device sends the third uplink signal to the second network device using the transmission power of the third uplink signal.

[0304] In an embodiment of the present application, the terminal device may calculate the transmit power based on the path loss of the second uplink signal, and use the transmit power to send a third uplink signal to the second network device. The third uplink signal may be any uplink signal other than the second uplink signal, or may be the same uplink signal as the second uplink signal (e.g., SRS).

[0305] In this implementation, the terminal device can determine the transmission power of the third uplink signal based on the path loss value corresponding to the TCI-state used by the third uplink signal, so that the third uplink signal can be sent using the transmission power.

[0306] See Figure 8 , Figure 8 A flow chart of another communication method provided in an embodiment of the present application is shown as follows: Figure 8 As shown, the method includes steps 801-806:

[0307] 801: The terminal device sends a second uplink signal to the second network device.

[0308] 802: The second network device obtains a measurement result of a second uplink signal.

[0309] The specific implementation of steps 801 and 802 can be found in Figure 6 The corresponding descriptions of steps 601 and 602 in the embodiment of the present invention are the same as those in the embodiment of the present invention, and can achieve the same or similar beneficial effects.

[0310] 803: The second network device sends the measurement result of the second uplink signal to the terminal device.

[0311] That is, the second network device sends the second information corresponding to the second uplink signal to the terminal device. The second network device can send the second information through the first network device.

[0312] Exemplarily, the second network device may also send second information corresponding to the second uplink signal to the terminal device through the second MAC CE. The second MAC CE is an enhanced version of the fifth MAC CE, and the fifth MAC CE is a MAC CE for activating the TCI-state of a specific control channel group, that is, the second MAC CE is an enhanced version of the MAC CE for activating the TCI-state of a specific control channel group. The control channel group refers to a CORESET group, and each control channel group corresponds to a CORESET group identifier (CORESETPoolIndex).

[0313] Among them, the fifth MACCE is used for multi-station transmission scenarios of multiple DCI. In this scenario, the network side communicates with the terminal device through two TRPs. The two TRPs correspond to two control channel groups respectively. The network side can send a fifth MACCE to activate the TCI-state of one of the TRPs. Figure 9 As shown, the fifth MACCE activates the TCI-state of the first TRP / control channel group or the TCI-state of the second TRP / control channel group, which is indicated by the first field "CORESETPoolID" in the MACCE. The MACCE can activate 8 TCI-state groups, each TCI-state group includes an uplink TCI-state, or includes a downlink TCI-state, or includes an uplink TCI-state and a downlink TCI-state. Whether each TCI-state group specifically includes one TCI-state or two TCI-states is indicated by the P field, that is, whether the i-th TCI-state group specifically includes one TCI-state or two TCI-states is indicated by the P field. iThe eight TCI-state groups correspond to the eight field values of the TCI field in the DCI, so that the network device can specifically indicate one of the eight TCI-state groups through the TCI field in the DCI. Of course, the fifth MACCE also includes the Serving cell ID field, the reserved position R field, etc., and the "D / U" field indicates downlink / uplink.

[0314] The embodiment of the present application enhances the fifth MAC CE so that it can indicate the second information corresponding to the second uplink signal. The format of the second MAC CE can be seen in Figure 10 Specifically, K bits are added to the first MAC-CE to indicate K pieces of second information. Each bit portion indicates one piece of second information. Each bit portion may be one byte (8 bits). K may be determined in the following ways:

[0315] Method 1: K = 8 is specified by default. That is, the second MACCE contains 8 second information, corresponding to the 8 TCI-state groups activated by the second MACCE (also activated by the fifth MACCE), or corresponding to the uplink TCI-states in the 8 TCI-state groups, or corresponding to the reference signal resources in the uplink TCI-states in the 8 TCI-state groups, or corresponding to the 8 TCI field values in the DCI. The reference signal resources can be path loss reference signal resources or beam reference signal resources.

[0316] Method 2: K is equal to the number of uplink TCI-states activated by the second MACCE (also activated by the fifth MACCE). For example, the second MACCE activates 8 TCI-state groups, but some of the TCI-state groups do not have an uplink TCI-state. In this case, K is not equal to 8. In this case, the K second information respectively correspond to the K activated uplink TCI-states, or the K second information respectively correspond to the reference signal resources in the K activated uplink TCI-states. That is, the i-th second information corresponds to the i-th activated uplink TCI-state. The i-th second information may refer to the i-th in the order of arrangement of the K second information in the second MACCE. The i-th uplink TCI-state may refer to the i-th in the order of arrangement of the K activated uplink TCI-states in the second MACCE. Or, the order of the size of the TCI field values corresponding to the K activated uplink TCI-states.

[0317] Method three: K is equal to the number of different uplink TCI-states activated by the second MACCE (also activated by the fifth MACCE). For example, the second MACCE activates 8 TCI-state groups, wherein the uplink TCI-states in multiple TCI-state groups are the same. These identical uplink TCI-states are not counted repeatedly, that is, only different uplink TCI-states are considered to determine the value of K. In this case, the K second information respectively correspond to the K different activated uplink TCI-states, or the K second information respectively correspond to the reference signal resources in the K different activated uplink TCI-states. Specifically, the i-th second information among the K second information corresponds to the i-th among the K different activated uplink TCI-states. The i-th among the K second information may refer to the i-th among the K second information in the order in which the K second information are arranged in the second MACCE. The i-th among the K different uplink TCI-states may refer to the i-th among the K different uplink TCI-states in the sorting order. The order of K different uplink TCI-states can be determined based on the order of multiple TCI-state groups activated by the second MACCE. Specifically, based on the order of multiple TCI-state groups activated by the MACCE, the uplink TCI-state in the front TCI-state group is ordered in front, and the uplink TCI-state in the back TCI-state group is ordered in the back. If an uplink TCI-state has already appeared in the previous TCI-state group, it is ignored and not ordered. For example, the indexes of the uplink TCI-states included in the currently activated 8 TCI-state groups are {#1, #3, #1, #2, #2, #4, #1, #5}, respectively, then K=5, and the order of the K=5 uplink TCI-states is #1, #3, #2, #4, #5.

[0318] Method 4: K is equal to the number of different reference signal resources included in the uplink TCI-state activated by the second MACCE (also activated by the fifth MACCE). For example, the second MACCE activates multiple uplink TCI-states, and some of the reference signal resources included in the multiple uplink TCI-states are repeated. The terminal device only counts the number of different reference signal resources, and the number of reference signal resources is K. In this case, the K second information respectively correspond to the K different reference signal resources included in the activated uplink TCI-state. That is, the i-th second information corresponds to the i-th of the K different reference signal resources. The i-th second information may refer to the i-th in the order of arrangement of the K second information in the second MACCE. The i-th of the K different reference signal resources may refer to the i-th in the sorting order of the K different reference signal resources. The sorting of the K reference signal resources can be determined according to the sorting of the multiple uplink TCI-states activated by the second MACCE. Specifically, based on the order of the multiple uplink TCI-states activated by the MACCE, the reference signal resources in the preceding uplink TCI-state are ordered first, and the reference signal resources in the following uplink TCI-states are ordered last. If a reference signal resource has already appeared in the preceding uplink TCI-state, it is ignored and not ordered. For example, if the indexes of the reference SRSs included in the six currently activated uplink TCI-states are {#1, #3, #1, #2, #2, #4}, then K = 4, and the order of these K = 4 reference SRSs is #1, #3, #2, #4.

[0319] Optionally, since the terminal device only needs to determine the second information corresponding to the second network device, if the first field in the second MACCE (i.e., the CORESETPoolID field) takes a value of 0 (i.e., corresponding to the first network device), then the part of the bits in the MACCE used to indicate the second information does not exist / can be defaulted.

[0320] Optionally, when the second network device does not have downlink functionality, each TCI-state group may only include one uplink TCI-state, and there is no need to use the P field to indicate the number of TCI-states included in the TCI-state group. If the first field in the second MACCE (i.e., the CORESETPoolID field) has a value of 1 (i.e., corresponding to the second network device), then all P fields in the MACCE are absent. Alternatively, even if present, the terminal device will ignore them.

[0321] Optionally, the portion of bits indicating the second information in the second MACCE exists only when the second MACCE satisfies a first condition. The first condition includes a combination of one or more of the following:

[0322] The value of the first field (i.e., CORESETPoolID) in the second MACCE is 1;

[0323] The presence of one field in the second MACCE indicates that the portion of bits indicating the second information is present in the MACCE;

[0324] One of the TRPs is an uplink-only TRP, or the RRC configuration allows downlink transmission based on a single TRP and uplink transmission based on two TRPs.

[0325] The path loss reference signal resources in all TCI-states activated by the second MACCE are SRS resources;

[0326] The TCI-state activated by the second MACCE is always the uplink TCI-state.

[0327] In this implementation, the MAC CE for activating the TCI-state of a specific control channel group is enhanced by introducing an additional field to indicate one or more second information, where the one or more second information corresponds to one or more uplink TCI-states activated by the MACCE, or the reference signal resources in the activated one or more uplink TCI-states.

[0328] Exemplarily, the second network device may also send second information corresponding to the second uplink signal to the terminal device through a third MAC CE. The third MAC CE is an enhancement of the sixth MAC CE, which is a MAC CE for activating the uplink and downlink joint TCI-state. That is, the third MAC CE is an enhancement of the MAC CE for activating the uplink and downlink joint TCI-state.

[0329] Among them, the sixth MAC CE is used for the joint TCI mode in the multi-station transmission scenario of a single DCI. The multi-station transmission scenario of a single DCI means that the network side communicates with the terminal device through two TRPs, and the two TRPs correspond to the same control channel group identifier (coresetpoolIndex). The joint TCI mode means that the uplink and downlink use a unified TCI-state, that is, the uplink and downlink joint TCI-state is used, and the uplink TCI-state and downlink TCI-state are no longer distinguished. The network side can send a sixth MAC-CE to activate the uplink and downlink joint TCI-state of the two TRPs. Figure 11As shown, in addition to the conventional R field, Servingcell ID field and DL BWP ID field, the sixth MAC CE can activate 8 TCI-state groups, each TCI-state group includes a first TCI-state, or includes a second TCI-state, or includes a first TCI-state and a second TCI-state. The first TCI-state refers to the uplink and downlink combined TCIs-tate corresponding to TRP1, and the second TCI-state refers to the uplink and downlink combined TCIs-tate corresponding to TRP2. Whether each TCI-state group includes the first TCI-state and whether it includes the second TCI-state is indicated by a field respectively. Specifically, whether the i-th TCI-state group includes the first TCI-state and whether it includes the second TCI-state is indicated by F i,1 Field and F i,2 The eight TCI-state groups correspond to eight field values of the TCI field in the DCI, so that the network device can specifically indicate one of the eight TCI-state groups through the TCI field in the DCI.

[0330] In the embodiment of the present application, the sixth MAC CE is enhanced so that it can indicate the second information corresponding to the second uplink signal. The format of the third MAC CE can be seen Figure 12 Specifically, K bits are added to the sixth MACCE to indicate K pieces of second information. Each bit portion indicates one piece of second information. Each bit portion may be a byte (8 bits). K may be determined in the following ways:

[0331] Method 1: K = 8 is specified by default. That is, the third MACCE contains eight second information, corresponding to the eight TCI-state groups activated by the third MACCE (also activated by the sixth MACCE), or corresponding to the second TCI-state in the eight TCI-state groups, or corresponding to the reference signal resources in the second TCI-state in the eight TCI-state groups, or corresponding to the eight TCI field values in the DCI. The reference signal resources can be path loss reference signal resources or beam reference signal resources.

[0332] Method 2: K is equal to the number of the second TCI-state activated by the third MACCE (also activated by the sixth MACCE). In other words, K is equal to the {F 12 ,F 22 ,…,F 82}The number of fields with a value of 1 in these 8 fields. For example, the MACCE activates 8 TCI-state groups, but some of the TCI-state groups do not have a second TCI-state. In this case, K is not equal to 8. In this case, the K second information respectively correspond to the activated K second TCI-states, or the K second information respectively correspond to the reference signal resources in the activated K second TCI-states. That is, the i-th second information corresponds to the i-th activated second TCI-state. The i-th second information may refer to the i-th in the order of arrangement of the K second information in the third MACCE. The i-th second TCI-state may refer to the i-th in the order of arrangement of the K activated second TCI-states in the third MACCE. For example, the i-th second TCI-state refers to F 12 to F 82 The i-th field with a value of 1 among these 8 fields corresponds to the second TCI-state.

[0333] Method 3: K is equal to the number of different second TCI-states activated by the third MACCE (also activated by the sixth MACCE). For example, the third MACCE activates 8 TCI-state groups, where the second TCI-states in multiple TCI-state groups are the same. These identical second TCI-states are not counted repeatedly, that is, only different second TCI-states are considered to determine the value of K. In this case, the K second information correspond to the K different activated second TCI-states, or the K second information correspond to the reference signal resources in the K different activated second TCI-states. Specifically, the i-th second information among the K second information corresponds to the i-th second information among the K different activated second TCI-states. The i-th second information among the K second information may refer to the i-th second information among the K second information in the order in which they are arranged in the third MACCE. The i-th second TCI-state among the K different second TCI-states may refer to the i-th second information among the K different second TCI-states in the order in which they are sorted. The order of the K different second TCI-states can be determined based on the order of the multiple TCI-state groups activated by the third MACCE. Specifically, based on the order of the multiple TCI-state groups activated by the MACCE, the second TCI-state in the first TCI-state group is ordered first, and the second TCI-state in the second TCI-state group is ordered last. If a second TCI-state has already appeared in the previous TCI-state group, it is ignored and not ordered. For example, if the indexes of the second TCI-states included in the currently activated 8 TCI-state groups are {#1, #3, #1, #2, #2, #4, #1, #5}, then K = 5, and the order of the K = 5 second TCI-states is #1, #3, #2, #4, #5.

[0334] Method 4: K is equal to the number of different reference signal resources included in the second TCI-state activated by the third MACCE. For example, the MACCE activates multiple second TCI-states (also activated by the sixth MACCE), and some of the reference signal resources included in the multiple second TCI-states are repeated. The terminal device only counts the number of different reference signal resources, and the number of reference signal resources is K. In this case, the K second information respectively correspond to the K different reference signal resources included in the activated second TCI-state. That is, the i-th second information corresponds to the i-th of the K different reference signal resources. The i-th second information may refer to the i-th in the order of arrangement of the K second information in the third MACCE. The i-th of the K different reference signal resources may refer to the i-th in the sorting order of the K different reference signal resources. The sorting of the K reference signal resources can be determined according to the sorting of the multiple second TCI-states activated by the third MACCE. Specifically, based on the order of the multiple second TCI-states activated by the MACCE, the reference signal resources in the first second TCI-state are ordered first, and the reference signal resources in the second TCI-states that are ordered later are ordered later. If a reference signal resource has already appeared in the previous second TCI-state, it is ignored and not ordered. For example, if the indexes of the reference signal resources included in the six currently activated second TCI-states are {#1, #3, #1, #2, #2, #4}, then K=4, and the order of the K=4 reference signal resources is #1, #3, #2, #4.

[0335] Optionally, the portion of bits indicating the second information in the third MACCE exists only when the third MACCE satisfies a second condition. The second condition includes a combination of one or more of the following:

[0336] The presence of one field in the third MACCE indicates that the portion of bits indicating the second information is present in the MACCE;

[0337] One of the TRPs is an uplink-only TRP, or the RRC configuration allows downlink transmission based on a single TRP and uplink transmission based on two TRPs.

[0338] All path loss reference signal resources in the second TCI-state activated by the third MACCE are SRS resources.

[0339] In this implementation, the MAC CE used to activate the uplink and downlink joint TCI-state is enhanced, and an additional field is introduced to indicate one or more second information, which corresponds to one or more second TCI-states activated by the MACCE, or the reference signal resources in the activated one or more second TCI-states.

[0340] Exemplarily, the second network device may also send second information corresponding to the second uplink signal to the terminal device via a fourth MAC CE. The fourth MAC CE is an enhancement of the seventh MAC CE, which is a MAC CE for activating uplink and downlink independent TCI-states. That is, the fourth MAC CE is an enhancement of the MAC CE for activating uplink and downlink independent TCI-states.

[0341] Among them, the seventh MACCE is used for the independent TCI mode in the multi-station transmission scenario of a single DCI. The multi-station transmission scenario of a single DCI means that the network side communicates with the terminal device through two TRPs, and the two TRPs correspond to the same control channel group identifier (coresetpoolIndex). The independent TCI mode means that the uplink and downlink use independent TCI-states, that is, the uplink TCI-state and downlink TCI-state are used respectively. The network side can send a seventh MACCE to activate the uplink TCI-state and / or downlink TCI-state of the two TRPs. Figure 13As shown, in addition to the conventional R field, Serving cell ID field, DLBWP ID field and UL BWP ID field, the seventh MAC CE can activate 8 TCI-state groups. Each TCI-state group can include any part or all of the four TCI-states: the first downlink TCI-state, the second downlink TCI-state, the first uplink TCI-state and the second uplink TCI-state. The first uplink TCI-state and the first downlink TCI-state refer to the uplink TCI-state and downlink TCIs-tate corresponding to TRP1; the second uplink TCI-state and the second downlink TCI-state refer to the uplink TCI-state and downlink TCIs-tate corresponding to TRP2. Whether each TCI-state group includes the first downlink TCI-state, whether it includes the second downlink TCI-state, whether it includes the first uplink TCI-state and whether it includes the second uplink TCI-state is indicated by a field respectively. Specifically, whether the i-th TCI-state group includes the first downlink TCI-state, whether it includes the second downlink TCI-state, whether it includes the first uplink TCI-state, and whether it includes the second uplink TCI-state is determined by F i,1 Field, F i,2 Field, S i,1 Field and S i,2 The eight TCI-state groups correspond to eight field values of the TCI field in the DCI, so that the network device can specifically indicate one of the eight TCI-state groups through the TCI field in the DCI.

[0342] In the embodiment of the present application, the seventh MAC CE is enhanced so that it can indicate the second information corresponding to the second uplink signal. The format of the fourth MAC CE can be seen Figure 14 Specifically, K bits are added to the seventh MACCE to indicate K pieces of second information. Each bit portion indicates one piece of second information. Each bit portion may be one byte (8 bits). K may be determined in the following ways:

[0343] Method 1: K=8 is specified by default. That is, the fourth MACCE contains eight pieces of second information, corresponding to the eight TCI-state groups activated by the MACCE (also activated by the seventh MACCE), or corresponding to the second uplink TCI-state in the eight TCI-state groups, or corresponding to the reference signal resources in the second uplink TCI-state in the eight TCI-state groups, or corresponding to the eight TCI field values in the DCI.

[0344] Method 2: K is equal to the number of the second uplink TCI-state activated by the fourth MACCE (also activated by the seventh MACCE). In other words, K is equal to the {S 12 ,S 22,… ,S 82}The number of fields with a value of 1 in these 8 fields. For example, the MACCE activates 8 TCI-state groups, but some of the TCI-state groups do not have a second uplink TCI-state. In this case, K is not equal to 8. In this case, the K second information respectively correspond to the activated K second uplink TCI-states, or the K second information respectively correspond to the reference SRS in the activated K second uplink TCI-states. That is, the i-th second information corresponds to the activated i-th second uplink TCI-state. The i-th second information may refer to the i-th in the order of arrangement of the K second information in the fourth MACCE. The i-th second uplink TCI-state may refer to the i-th in the order of arrangement of the K activated second uplink TCI-states in the fourth MACCE. For example, the i-th second uplink TCI-state refers to S 12 to S 82 The i-th field with a value of 1 among these 8 fields corresponds to the second uplink TCI-state.

[0345] Method three: K is equal to the number of different second uplink TCI-states activated by the fourth MACCE (also activated by the seventh MACCE). For example, the fourth MACCE activates 8 TCI-state groups, wherein the second uplink TCI-states in multiple TCI-state groups are the same. These identical second uplink TCI-states are not counted repeatedly, that is, only different second uplink TCI-states are considered to determine the value of K. In this case, the K second information respectively correspond to the K different activated second uplink TCI-states, or the K second information respectively correspond to the reference signal resources in the K different activated second uplink TCI-states. Specifically, the i-th second information among the K second information corresponds to the i-th among the K different activated second uplink TCI-states. The i-th among the K second information may refer to the i-th among the K second information in the order in which they are arranged in the fourth MACCE. The i-th among the K different second uplink TCI-states may refer to the i-th among the K different second uplink TCI-states in the order in which they are sorted. The order of K different second uplink TCI-states can be determined according to the order of multiple TCI-state groups activated by the fourth MACCE. Specifically, according to the order of multiple TCI-state groups activated by the MACCE, the second uplink TCI-state in the front TCI-state group is ordered in front, and the second uplink TCI-state in the back TCI-state group is ordered in the back. If a second uplink TCI-state has already appeared in the front TCI-state group, it is ignored and not ordered. For example, the indexes of the second uplink TCI-states included in the 8 currently activated TCI-state groups are {#1, #3, #1, #2, #2, #4, #1, #5}, respectively, then K=5, and the order of the K=5 second uplink TCI-states is #1, #3, #2, #4, #5. Method 4: K is equal to the number of different reference signal resources included in the second uplink TCI-state activated by the fourth MACCE. For example, the MACCE activates multiple second uplink TCI-states, and some of the reference signal resources included in the multiple second uplink TCI-states are repeated. The terminal device only counts the number of different reference signal resources, and the number of reference signal resources is K. In this case, the K second information respectively corresponds to the K different reference signal resources included in the activated second uplink TCI-state. That is, the i-th second information corresponds to the i-th of the K different reference signal resources. The i-th second information may refer to the i-th in the order of arrangement of the K second information in the fourth MACCE.The i-th of the K different reference signal resources may refer to the i-th in the sorting order of the K different reference signal resources. The sorting of the K reference signal resources may be determined according to the sorting of the multiple second uplink TCI-states activated by the fourth MACCE. Specifically, according to the sorting of the multiple second uplink TCI-states activated by the fourth MACCE, the reference signal resources in the front second uplink TCI-state are sorted in front, and the reference signal resources in the back second uplink TCI-state are sorted in the back. If a reference signal resource has already appeared in the front second uplink TCI-state, it is ignored and not sorted. For example, the indexes of the reference signal resources included in the currently activated 6 second uplink TCI-states are {#1, #3, #1, #2, #2, #4}, respectively, then K=4, and the sorting of the K=4 reference signal resources is #1, #3, #2, #4.

[0346] Optionally, the portion of bits indicating the second information in the fourth MACCE exists only when the third condition is satisfied. The third condition includes a combination of one or more of the following:

[0347] The presence of one field in the fourth MACCE indicates that the portion of bits indicating the second information exists in the MACCE;

[0348] One of the TRPs is an uplink-only TRP, or the RRC configuration allows downlink transmission based on a single TRP and uplink transmission based on two TRPs.

[0349] All path loss reference signal resources in the second uplink TCI-state activated by the fourth MACCE are SRS resources.

[0350] In this implementation, the MAC CE used to activate independent uplink and downlink TCI-states can be enhanced by introducing additional fields to indicate one or more second information, where the one or more second information corresponds to one or more TCI-states activated by the MACCE, or reference signal resources in one or more activated second uplink TCI-states.

[0351] 804: The terminal device determines the path loss of the second uplink signal based on the second information corresponding to the second uplink signal.

[0352] Among them, the terminal equipment can refer to Figure 6 The path loss of the second uplink signal is determined in the manner described in step 604 and can achieve the same or similar beneficial effects.

[0353] 805: The terminal device determines the transmission power of the third uplink signal.

[0354] Specifically, the terminal device first determines the TCI-state used by the third uplink signal, determines which of the above-mentioned second uplink signals the reference signal resource in the TCI-state is, and then uses the path loss corresponding to the second uplink signal to calculate the transmission power corresponding to the third uplink signal.

[0355] 806: The terminal device sends the third uplink signal to the second network device using the transmission power of the third uplink signal.

[0356] In an embodiment of the present application, the terminal device may calculate the transmit power based on the path loss of the second uplink signal, and use the transmit power to send a third uplink signal to the second network device. The third uplink signal may be any uplink signal other than the second uplink signal, or may be the same uplink signal as the second uplink signal (e.g., SRS).

[0357] In this implementation, the terminal device can determine the transmission power of the third uplink signal based on the path loss value corresponding to the TCI-state adopted by the third uplink signal, or based on the path loss value of the reference signal in the TCI-state adopted by the third uplink signal, so that the third uplink signal can be sent using this transmission power.

[0358] See Figure 15 , Figure 15 A flow chart of another communication method provided in an embodiment of the present application is shown as follows: Figure 15 As shown, the method includes steps 1501-1506:

[0359] 1501: The terminal device sends a second uplink signal to the second network device.

[0360] 1502: The second network device obtains a measurement result of a second uplink signal.

[0361] The specific implementation of steps 1501 and 1502 can be found in Figure 6 The corresponding descriptions of steps 601 and 602 in the embodiment of the present invention are the same as those in the embodiment of the present invention, and can achieve the same or similar beneficial effects.

[0362] 1503: The second network device sends the measurement result corresponding to the second TCI-state to the terminal device.

[0363] That is, the second network device sends the second information corresponding to the second TCI-state to the terminal device. The second network device can send the above second information through the first network device.

[0364] Optionally, the second information corresponding to the second TCI-state can be indicated by RRC signaling. For example, the second information corresponding to the second TCI-state is configured by RRC signaling. Specifically, the second information corresponding to the TCI-state can be indicated by a configuration parameter in the TCI-state. That is, the second information corresponding to a TCI-state can be configured in the configuration parameters of the TCI-state. In addition to configuring the second information, the TCI-state can also be configured with a path loss reference resource to determine the path loss corresponding to the TCI-state. It can be stipulated that when the path loss reference resource in the TCI-state is a downlink reference signal resource, the second information cannot be configured in the TCI-state. Because if the TCI-state has a corresponding downlink reference signal resource as a path loss resource, the terminal device can directly measure the path loss corresponding to the TCI-state through the path loss resource, and there is no need to calculate it through the second information. Or, conversely, when the path loss resource in the TCI-state is an uplink reference signal resource, the second information must be configured in the TCI-state. Otherwise, the terminal device cannot use the method described above to calculate the path loss value corresponding to the TCI-state. Alternatively, when the path loss resource is not configured in the TCI-state, the second information must be configured in the TCI-state.

[0365] Optionally, the second information corresponding to the second TCI-state may be indicated by MACCE signaling, for example, by the second MACCE, the third MACCE, and / or the fourth MACCE in step 603 or 803.

[0366] Optionally, the second information corresponding to the second TCI-state can be jointly indicated through RRC and MACCE signaling. For example, the second information corresponding to the second TCI-state is configured through RRC signaling. Specifically, the second information corresponding to the TCI-state can be indicated by a configuration parameter in the TCI-state. Then, the change in the second information corresponding to the second TCI-state is indicated through MAC-CE. The reason for indicating the change in the second information is that the second information corresponding to the second TCI-state will change as the terminal device moves.

[0367] Exemplarily, the second information corresponding to the second TCI-state is the RSRP difference or path loss difference corresponding to the second TCI-state. The RSRP difference / path loss difference is the RSRP difference / path loss difference between the uplink signal corresponding to the reference signal resource in the second TCI-state (the uplink signal is a second uplink signal) and the first uplink signal, which can be calculated through the previous steps. When the RSRP difference / path loss difference corresponding to the second TCI-state changes, the network device indicates the change in the RSRP difference / path loss difference corresponding to each second TCI-state through several MACCEs in step 803.

[0368] Steps 603 and 803 are used to determine the change in RSRP difference / path loss difference corresponding to one or more second uplink signals. The same method can be used to determine the change in RSRP difference / path loss difference corresponding to one or more second TCI-states. For example, the second uplink signal in steps 603 and 803 can be replaced with the second TCI-state, thereby providing an indication of the change in RSRP difference / path loss difference corresponding to multiple one or more second TCI-states.

[0369] 1504: The terminal device determines the path loss of the second TCI-state based on the second information corresponding to the second TCI-state.

[0370] Among them, the terminal equipment can refer to Figure 6 The path loss of the second uplink signal can be determined in the manner described in step 604, and can achieve the same or similar beneficial effects. Specifically, step 604 is used to determine the path loss corresponding to one or more second uplink signals. The same method can be used to determine the path loss corresponding to one or more second TCI-states. For example, the second uplink signal in step 604 can be replaced with the second TCI-state, thereby obtaining the path loss corresponding to multiple one or more second TCI-states.

[0371] 1505: The terminal device determines the transmission power of the third uplink signal.

[0372] Specifically, the terminal device first determines the TCI-state used by the third uplink signal, determines which of the above-mentioned second TCI-states the TCI-state is, and then uses the path loss corresponding to the second TCI-state to calculate the transmission power corresponding to the third uplink signal.

[0373] 1506: The terminal device sends a third uplink signal to the second network device using the transmission power of the third uplink signal.

[0374] In an embodiment of the present application, the terminal device may calculate the transmit power based on the path loss of the second uplink signal, and use the transmit power to send a third uplink signal to the second network device. The third uplink signal may be any uplink signal other than the second uplink signal, or may be the same uplink signal as the second uplink signal (e.g., SRS).

[0375] In this implementation, the terminal device can determine the transmission power of the third uplink signal based on the path loss value corresponding to the TCI-state used by the third uplink signal, so that the third uplink signal can be sent using the transmission power.

[0376] Optionally, it may be specified that the above method only applies when a single control channel group is configured. That is, when multiple control channel groups are configured, the above method cannot be used. For example, only when a single control channel group is configured can the network device indicate the path loss difference / RSRP difference to the terminal device, and the terminal device can use the path loss difference / RSRP difference to calculate the path loss.

[0377] Alternatively, the terminal device may report, through terminal capability information, whether it supports the above method in a scenario where multiple control channel groups are configured. For example, the terminal device may report whether it supports the above path loss difference / RSRP difference to calculate path loss when two control channel groups are configured.

[0378] The terminal device may also report, through terminal capability information, whether it supports the use of the above-mentioned path loss difference / RSRP difference to calculate the path loss.

[0379] The terminal device can also report the maximum number of path loss differences / RSRP differences it maintains through terminal capability information.

[0380] The method of the embodiment of the present application is described above, and the device of the embodiment of the present application is provided below.

[0381] See Figure 16 , Figure 16 This is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. The communication device can be used to perform the above Figure 6 、 Figure 7B 、 Figure 8 、 Figure 15 For details on the process executed by the terminal device in any of the embodiments shown, please refer to the relevant introduction in the above method embodiments. Figure 16As shown, it includes a first transceiver unit 1601 and a first processing unit 1602; the first transceiver unit 1601 can implement corresponding communication functions, and may include a first sending unit and a first receiving unit, for example, it can be used to implement the corresponding functions of the above steps 601, 606, or steps 801, 806, or steps 1501, 1506. The first processing unit 1602 can be used to perform data processing, for example, it can be used to implement the corresponding functions of the above steps 604, 605, or steps 804, 805, or steps 1504, 1505. Among them:

[0382] The first transceiver unit 1601 is configured to send a second uplink signal to the second network device; and receive a measurement result of the second uplink signal from the second network device.

[0383] The first processing unit 1602 is configured to determine a path loss of the second uplink signal based on a measurement result of the second uplink signal.

[0384] It can be seen that in Figure 16 In the illustrated apparatus, a terminal device can send an uplink signal to a network device. The network device measures the uplink signal and transmits the measurement result to the terminal device. This allows the terminal device to determine the path loss between the terminal device and the network device based on the measurement result sent by the network device. This method can be used to determine the path loss between the terminal device and the network device, regardless of whether the network device has downlink functionality, improving the applicability of the solution.

[0385] In a possible implementation, the measurement result of the second uplink signal includes one or more of the following:

[0386] received power of the second uplink signal;

[0387] path loss of the second uplink signal;

[0388] a difference between the received power of the second uplink signal and the received power of the first uplink signal;

[0389] a difference between the path loss of the second uplink signal and the path loss of the first uplink signal;

[0390] Among them, the first uplink signal is an uplink signal sent by the terminal device to the first network device.

[0391] In a possible implementation, the measurement result of the second uplink signal is carried in a medium access control MAC control element CE.

[0392] In a possible implementation, the MAC CE is a first MAC CE; the first MAC CE includes a measurement result of the second uplink signal and one or more of the following:

[0393] The index of the second uplink signal;

[0394] The index of the resource set corresponding to the second uplink signal.

[0395] In one possible implementation, there are M second uplink signals; the first MAC CE includes measurement results of K second uplink signals, where K is equal to the number of activated second transmission configuration indication TCI states; or K is equal to the number of different reference signal resources included in the activated second TCI state; and M is greater than or equal to K.

[0396] The second TCI state is an uplink TCI state or an uplink and downlink TCI state corresponding to the second control channel group.

[0397] In one possible implementation, the i-th measurement result among the K measurement results corresponds to the i-th TCI state among the K activated second TCI states; or, the i-th measurement result among the K measurement results corresponds to the reference signal resource in the i-th TCI state among the K activated second TCI states.

[0398] In a possible implementation manner, the MAC CE is a second MAC CE; the second MAC CE is a MAC CE used to activate the TCI state of the control resource group; and the second MAC CE includes a measurement result of the second uplink signal.

[0399] In a possible implementation, the MAC CE is a third MAC CE; the third MAC CE is a MAC CE used to activate an uplink and downlink joint TCI state; and the third MAC CE includes a measurement result of the second uplink signal.

[0400] In a possible implementation, the MAC CE is a fourth MAC CE; the fourth MAC CE is a MAC CE used to activate an uplink and downlink independent TCI state; and the fourth MAC CE includes a measurement result of the second uplink signal.

[0401] In a possible implementation, when the measurement result of the second uplink signal includes the received power of the second uplink signal, determining the path loss of the second uplink signal based on the measurement result of the second uplink signal includes:

[0402] The path loss of the second uplink signal is determined based on the received power of the second uplink signal and the transmitted power of the second uplink signal.

[0403] In a possible implementation, the method further includes:

[0404] determining a transmit power of a third uplink signal based on a path loss of the second uplink signal;

[0405] The third uplink signal is sent to the second network device using the transmission power of the third uplink signal.

[0406] It should be noted that Figure 16 The implementation of each unit described can also refer to Figures 6 to 15 The corresponding description of the embodiment shown. And, Figure 16 The beneficial effects brought about by the described communication device can be referred to Figures 6 to 15 The corresponding description of the illustrated embodiment will not be repeated here.

[0407] See Figure 17 , Figure 17 This is a schematic diagram of the structure of another communication device provided in an embodiment of the present application. The communication device can be used to perform the above Figure 6 、 Figure 7B 、 Figure 8 、 Figure 15 For details on the process performed by the second network device in any of the embodiments shown, please refer to the relevant introduction in the above method embodiments. Figure 17 As shown, the apparatus includes a second transceiver unit 1701 and a second processing unit 1702; the second transceiver unit 1701 can implement corresponding communication functions, and may include a second sending unit and a second receiving unit, for example, and can be used to implement the corresponding functions of steps 602, 802, or 1502 above. The second processing unit 1702 can be used to perform data processing, for example, and can be used to implement the corresponding functions of steps 603, 803, or 1503 above. Wherein:

[0408] The second transceiver unit 1701 is configured to receive a second uplink signal sent by a terminal device;

[0409] The second processing unit 1702 is configured to obtain a measurement result of a second uplink signal;

[0410] The second transceiver unit 1701 is further used to send the measurement result of the second uplink signal to the terminal device.

[0411] It can be seen that in Figure 16 In the illustrated apparatus, the network device receives and measures uplink signals from the terminal device, then communicates the measurement results to the terminal device. This allows the terminal device to determine the path loss between the terminal device and the network device based on the measurement results sent by the network device. This method allows the path loss between the terminal device and the network device to be determined regardless of whether the network device has downlink functionality, improving the solution's applicability.

[0412] In a possible implementation, the measurement result of the second uplink signal includes one or more of the following:

[0413] received power of the second uplink signal;

[0414] path loss of the second uplink signal;

[0415] a difference between the received power of the second uplink signal and the received power of the first uplink signal;

[0416] a difference between the path loss of the second uplink signal and the path loss of the first uplink signal;

[0417] Among them, the first uplink signal is an uplink signal sent by the terminal device to the first network device.

[0418] In a possible implementation, the measurement result of the second uplink signal is carried in a medium access control MAC control element CE.

[0419] In a possible implementation, the MAC CE is a first MAC CE; the first MAC CE includes a measurement result of the second uplink signal and one or more of the following:

[0420] The index of the second uplink signal;

[0421] The index of the resource set corresponding to the second uplink signal.

[0422] In a possible implementation, there are M second uplink signals; the first MAC CE includes measurement results of K second uplink signals, where K is equal to the number of activated second transmission configuration indication TCI states; or K is equal to the number of different reference signal resources included in the activated second TCI state; and M is greater than or equal to K.

[0423] The second TCI state is an uplink TCI state or an uplink and downlink TCI state corresponding to the second control channel group.

[0424] In one possible implementation, the i-th measurement result among the K measurement results corresponds to the i-th TCI state among the K activated second TCI states; or, the i-th measurement result among the K measurement results corresponds to the reference signal resource in the i-th TCI state among the K activated second TCI states.

[0425] In a possible implementation manner, the MAC CE is a second MAC CE; the second MAC CE is a MAC CE used to activate the TCI state of the control resource group; and the second MAC CE includes a measurement result of the second uplink signal.

[0426] In a possible implementation, the MAC CE is a third MAC CE; the third MAC CE is a MAC CE used to activate an uplink and downlink joint TCI state; and the third MAC CE includes a measurement result of the second uplink signal.

[0427] In a possible implementation, the MAC CE is a fourth MAC CE; the fourth MAC CE is a MAC CE used to activate an uplink and downlink independent TCI state; and the fourth MAC CE includes a measurement result of the second uplink signal.

[0428] It should be noted that Figure 17 The implementation of each unit described can also refer to Figures 6 to 15 The corresponding description of the embodiment shown. And, Figure 17 The beneficial effects brought about by the described communication device can be referred to Figures 6 to 15 The corresponding description of the illustrated embodiment will not be repeated here.

[0429] See Figure 18 , Figure 18 A structural diagram of a communication device provided in an embodiment of the present application, the communication device includes at least a processor 1801, a memory 1802 and a communication interface 1803, the communication interface 1803 includes a transmitter 18031, a receiver 18032 and an antenna 18033, and the transmitter 18031 and the receiver 18032 can form a transceiver. The communication device can be used to perform the relevant steps of the communication method. The communication device can be a terminal device in a wireless communication system, or a communication module in the terminal device, or a chip responsible for the communication function in the terminal device, such as a modem chip (also known as a baseband chip) or a SoC or SIP chip containing a modem module. Among them, when the communication device is a chip, the communication interface 1803 can be an input and output interface of the chip, for example, the transmitter 18031 can be an output interface, the receiver 18032 can be an input interface, and the memory 1802 can be an external memory of the chip. Wherein, when the communication device is a terminal device, the communication interface 1803 may be a transceiver, which may be used to execute the steps executed by the first transceiver unit 1601, and the processor 1801 may be used to execute the steps executed by the first processing unit 1602. The processor 1801 in the communication device is used to read the computer program code stored in the memory 1802, execute Figures 6 to 15 The method of any one of the embodiments shown.

[0430] The memory 1802 includes, but is not limited to, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or compact disc read-only memory (CD-ROM), and is used to store relevant computer programs and data.

[0431] The processor 1801 may be one or more central processing units (CPUs). When the processor 1801 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

[0432] Exemplarily, the processor 1801 in the communication device may be configured to read one or more programs stored in the memory 1802 and perform the following operations:

[0433] Sending a second uplink signal to the second network device;

[0434] receiving a measurement result of a second uplink signal from a second network device;

[0435] The path loss of the second uplink signal is determined based on the measurement result of the second uplink signal.

[0436] It should be noted that the implementation of each operation can also refer to Figures 6 to 15 The corresponding description of the method of any one of the embodiments shown.

[0437] It should be noted that although Figure 18 The communication device shown only shows the processor 1801, memory 1802 and communication interface 1803, as well as the transmitter 18031, receiver 18032 and antenna 18033. However, in the specific implementation process, those skilled in the art should understand that the communication device also includes other devices necessary for normal operation. At the same time, according to specific needs, those skilled in the art should understand that the communication device may also include hardware devices that implement other additional functions. In addition, those skilled in the art should understand that the communication device may also include only the devices necessary to implement the embodiments of the present application, and does not necessarily include Figure 18 All devices shown in .

[0438] See Figure 19 , Figure 19This is a structural diagram of another communication device provided in an embodiment of the present application. The communication device includes at least a processor 1901, a memory 1902, and a communication interface 1903. The communication interface 1903 includes a transmitter 19031, a receiver 19032, and an antenna 19033. The transmitter 19031 and the receiver 19032 can form a transceiver. The communication device can be used to perform the relevant steps of the communication method. The communication device can be a network device in a wireless communication system or a chip in the network device. When the communication device is a chip, the communication interface 1903 can be an input and output interface of the chip, for example, the transmitter 19031 can be an output interface, the receiver 19032 can be an input interface, and the memory 1902 can be an external memory of the chip. When the communication device is a network device, the communication interface 1903 can specifically be a transceiver, which can be used to perform the steps performed by the second transceiver unit 1701, and the processor 1901 can be used to perform the steps performed by the second processing unit 1702. The processor 1901 in the communication device is used to read the computer program code stored in the memory 1902 and execute Figures 6 to 15 The method of any one of the embodiments shown.

[0439] The memory 1902 includes but is not limited to RAM, ROM, EPROM, and CD-ROM, and is used to store relevant computer programs and data.

[0440] The processor 1901 may be one or more CPUs. When the processor 1901 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

[0441] Exemplarily, the processor 1901 in the communication device may be configured to read one or more programs stored in the memory 1902 and perform the following operations:

[0442] receiving a second uplink signal sent by the terminal device;

[0443] Obtaining a measurement result of a second uplink signal;

[0444] Send the measurement result of the second uplink signal to the terminal device.

[0445] It should be noted that the implementation of each operation can also refer to Figures 6 to 15 The corresponding description of the method of any one of the embodiments shown.

[0446] It should be noted that although Figure 19The communication device shown only shows the processor 1901, memory 1902 and communication interface 1903, as well as the transmitter 19031, receiver 19032 and antenna 19033. However, in the specific implementation process, those skilled in the art should understand that the communication device also includes other devices necessary for normal operation. At the same time, according to specific needs, those skilled in the art should understand that the communication device may also include hardware devices that implement other additional functions. In addition, those skilled in the art should understand that the communication device may also include only the devices necessary to implement the embodiments of the present application, and does not necessarily include Figure 19 All devices shown in .

[0447] The embodiment of the present application also provides a chip, including: a processor for calling and running a computer program from a memory, so that a device equipped with the chip executes the above-mentioned Figures 6 to 15 The method according to any one of the embodiments described above. The chip may be a chip in a communication device.

[0448] The embodiment of the present application further provides a computer-readable storage medium (Memory), which stores a computer program. When the computer program is executed, the above-mentioned Figures 6 to 15 The method described in any one of the embodiments. It can be understood that the computer-readable storage medium here can include both the built-in storage medium in the device and, of course, the extended storage medium supported by the device. The computer-readable storage medium provides a storage space, which stores the operating system of the device. In addition, one or more computer programs suitable for being loaded and executed by the processor of the device are also stored in the storage space. It should be noted that the computer-readable storage medium here can be a high-speed RAM or a non-volatile memory, such as at least one disk storage; optionally, it can also be at least one computer-readable storage medium located away from the aforementioned processor.

[0449] The embodiment of the present application further provides a computer program product, the computer program product comprising: computer program code, when the computer program code is executed by a communication device, Figures 6 to 15 The method process described in any one of the embodiments is implemented.

[0450] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0451] It should be understood that the processor mentioned in the embodiments of the present application may be a CPU, or may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0452] It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a ROM, a programmable read-only memory (PROM), an EPROM, an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a RAM, which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DRRAM).

[0453] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) is integrated into the processor.

[0454] It should be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0455] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0456] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely exemplary. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0457] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0458] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. If the aforementioned integrated units are implemented as software functional units and sold or used as independent products, they may be stored in a computer-readable storage medium.

[0459] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. In the text description of this application, the character " / " generally indicates that the associated objects are in an "or" relationship.

[0460] The steps in the method of the embodiment of the present application can be adjusted in order, combined and deleted according to actual needs.

[0461] The modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0462] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A communication method, characterized in that: Applied to a terminal device; the method comprises: Sending a second uplink signal to the second network device; receiving a measurement result of the second uplink signal from the second network device; The path loss of the second uplink signal is determined based on the measurement result of the second uplink signal.

2. A communication method, characterized in that: Applied to a second network device; the method includes: receiving a second uplink signal sent by the terminal device; Obtaining a measurement result of the second uplink signal; Send the measurement result of the second uplink signal to the terminal device.

3. The method according to claim 1 or 2, characterized in that The measurement result of the second uplink signal includes one or more of the following: received power of the second uplink signal; path loss of the second uplink signal; a difference between the received power of the second uplink signal and the received power of the first uplink signal; a difference between a path loss of the second uplink signal and a path loss of the first uplink signal; The first uplink signal is an uplink signal sent by the terminal device to the first network device.

4. The method according to claim 1, 2 or 3, characterized in that The measurement result of the second uplink signal is carried in a media access control MAC control element CE.

5. The method according to claim 4, characterized in that The MAC CE is a first MAC CE; the first MAC CE includes a measurement result of the second uplink signal and one or more of the following: an index of the second uplink signal; The index of the resource set corresponding to the second uplink signal.

6. The method according to claim 5, characterized in that There are M second uplink signals; the first MAC CE includes K measurement results of the second uplink signals, where K is equal to the number of activated second transmission configuration indication TCI states; or K is equal to the number of different reference signal resources included in the activated second TCI state; M is greater than or equal to K; The second TCI state is an uplink TCI state or an uplink and downlink TCI state corresponding to the second control channel group.

7. The method according to claim 6, characterized in that The i-th measurement result among the K measurement results corresponds to the i-th TCI state among the activated K second TCI states; or, the i-th measurement result among the K measurement results corresponds to the reference signal resource in the i-th TCI state among the activated K second TCI states.

8. The method according to claim 4, characterized in that The MAC CE is a second MAC CE; the second MAC CE is a MAC CE used to activate the TCI state of the control resource group; the second MAC CE includes a measurement result of the second uplink signal.

9. The method according to claim 4, characterized in that The MAC CE is a third MAC CE; the third MAC CE is a MAC CE used to activate an uplink and downlink joint TCI state; the third MAC CE includes a measurement result of the second uplink signal.

10. The method according to claim 4, characterized in that The MAC CE is a fourth MAC CE; the fourth MAC CE is a MAC CE used to activate an uplink and downlink independent TCI state; the fourth MAC CE includes a measurement result of the second uplink signal.

11. The method according to any one of claims 1, 3-10, characterized in that: In a case where the measurement result of the second uplink signal includes the received power of the second uplink signal, the determining the path loss of the second uplink signal based on the measurement result of the second uplink signal includes: The path loss of the second uplink signal is determined based on the received power of the second uplink signal and the transmitted power of the second uplink signal.

12. The method according to any one of claims 1, 3-10, characterized in that The method further comprises: determining a transmit power of a third uplink signal based on a path loss of the second uplink signal; The third uplink signal is sent to the second network device using the transmission power of the third uplink signal.

13. A communication device, characterized in that: The method comprises a module for executing the method according to any one of claims 1 and 3 to 12; or the method comprises a module for executing the method according to any one of claims 2 to 10.

14. A communication device, characterized in that: The invention comprises a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and configured to cooperate with the communication interface to implement the method according to any one of claims 1, 3-12, or 2-10 when executed by the processor.

15. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program for execution by a device, and when the computer program is executed, the method of any one of claims 1, 3-12, or claims 2-10 is implemented.

16. A chip, characterized in that: include: A processor, wherein the processor is configured to call and execute a computer program from a memory, so that a device equipped with the chip executes the method according to any one of claims 1, 3-12, or 2-10.

17. A computer program product, characterized in that When the computer program product is executed by a communication device, the communication device executes the method according to any one of claims 1, 3-12, or 2-10.

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