WO2021159447A1

WO2021159447A1 - Method and apparatus for tracking reference signal

Info

Publication number: WO2021159447A1
Application number: PCT/CN2020/075217
Authority: WO
Inventors: 管鹏
Original assignee: 华为技术有限公司
Priority date: 2020-02-14
Filing date: 2020-02-14
Publication date: 2021-08-19
Also published as: CN115039467A

Abstract

Provided in the present application are a method and apparatus for tracking a reference signal, which enable a terminal device and a network device to be aligned on which reference signals the terminal device has tracked, thereby improving the efficiency with which uplink transmit power is adjusted for the terminal device by the network device, and reducing signaling overhead. The method comprises: a terminal device receives first information from a network device, wherein the first information is used to indicate whether a default mode is enabled; and in the default mode, according to a reference signal related to a downlink control channel, the terminal device determines a reference signal to be tracked; and the terminal device receives second information from the network device, wherein the second information is used to configure multiple pathloss estimation reference signals; and if the default mode is enabled, the terminal device tracks a reference signal determined on the basis of the reference signal related to the downlink control channel, and does not track the multiple pathloss estimation reference signals.

Description

Method and device for tracking reference signal

Technical field

This application relates to the field of communications, and in particular to a method and device for tracking reference signals in the field of communications.

Background technique

In cellular network communication, the parameters used to determine the uplink transmission power of the terminal equipment are configured by the network equipment. The purpose of uplink power control is to make the power of the signal sent by the terminal device reach the network device to meet the receiving condition of the network device. Since the distance between each terminal device and the network device is different, the terminal device needs to estimate the path loss (pathloss, PL) in signal transmission to adjust the uplink transmission power. The path loss is referred to as "path loss" for short. In order to control the uplink transmit power, the network device needs to configure a path loss reference signal (pathloss reference signal, PL RS), also called a path loss estimation reference signal, so that the terminal device can track. Tracking includes periodic measurement and maintenance of the path loss measurement results corresponding to each PL RS.

Taking into account the changes in the transmission environment brought about by the mobility of terminal equipment, especially in high-frequency communications (such as millimeter wave communications), it is also necessary to consider the changes in the transmitting beam of the terminal equipment and the receiving beam of the network equipment, and the configuration of the network equipment PL RS usually has more than one. Version 15 (release 15, R15) allows network devices to be configured with a maximum of 4 PL RSs. The terminal should track the PL RS configured by all network devices, so that the network device can make dynamic adjustments. That is, the network device dynamically indicates one of the four PL RSs, and the terminal device can adjust its transmission power immediately. In order to better support the transmission power change demand caused by the transmission beam change in high-frequency communication, version 16 (release 16, R16) allows network devices to configure a maximum of 64 PL RSs. In order not to increase the measurement and maintenance burden of the terminal equipment, the terminal equipment still only needs to track 4 of the PL RSs. When a network device dynamically indicates a PL RS, if it is a PL RS that the terminal device has not tracked, the terminal device needs an extra period of time to measure the PL RS, determine the path loss estimate, and adjust the transmission power; if This is a PL RS tracked by the terminal device. Since the terminal device always maintains the path loss estimate, the terminal device can immediately adjust the transmission power without measuring.

In the above-mentioned R16 method, the network device cannot know which PL RSs are tracked by the terminal device. In this way, for a PL RS, if the network device always assumes that the terminal device does not track the PL RS, and the terminal device actually tracks the PL RS, unnecessary delay will occur; if the network device always assumes that the terminal device has tracked The PL RS, but the terminal device does not track the PL RS, and the terminal device cannot adjust the uplink transmission power in time as required. After the network device finds that the uplink transmission power of the terminal device has not been adjusted in time, it will repeat the transmission power adjustment instructions, resulting in communication. Make redundant.

Summary of the invention

This application provides a method and device for tracking reference signals, which can determine the reference signals tracked by the terminal device based on specific rules, so that the terminal device and the network device align which reference signals the terminal device tracks, which is beneficial to improve the network device as a terminal device. Adjust the efficiency of uplink transmission power and save signaling overhead.

In a first aspect, a method for tracking a reference signal is provided, including: a terminal device receives first information from a network device, where the first information is used to indicate whether a default mode is enabled, and in the default mode, the terminal The device determines the reference signal to be tracked according to the reference signal related to the downlink control channel; the terminal device receives second information from the network device, and the second information is used to configure multiple path loss estimation reference signals; if said The default mode is enabled, and the terminal device tracks the reference signal determined based on the reference signal related to the downlink control channel, and does not track the multiple path loss estimation reference signals.

In other words, if the default mode is enabled, the terminal device can determine the reference signal to be tracked based on the reference signal related to the downlink control channel, and ignore the path loss estimation reference signal indicated by the second information.

In this way, both the network device and the terminal device can determine which reference signals are the reference signals to be tracked according to whether the default mode is turned on, so that the terminal device and the network device align which reference signals the terminal device tracks. If the network device subsequently needs the terminal device to adjust the uplink transmission power, it can determine an appropriate reference signal and indicate the reference signal to the terminal device. If the reference signal is one of the reference signals tracked by the terminal device, since the terminal device always maintains the estimated path loss corresponding to the reference signal, the uplink transmission power can be adjusted in time without unnecessary adjustments. Time delay; if the reference signal is a reference signal not tracked by the terminal device, the terminal device can use an extra period of time to track the reference signal indicated by the network device, obtain the path loss estimate, and then adjust the uplink transmission power. Since the network device knows that the terminal device has not tracked the reference signal and needs an extra period of time to adjust, the network device will not repeatedly send power adjustment instructions, and signaling redundancy will not occur.

In summary, the method for tracking reference signals in the embodiments of the present application determines the reference signals tracked by the terminal device based on specific rules, so that the terminal device and the network device align which reference signals the terminal device tracks, which is beneficial to improve the network device as a terminal device. Adjust the efficiency of uplink transmission power and save signaling overhead.

It should be understood that the aforementioned default mode refers to a reference mode specified by the protocol without an explicit indication. In the default mode, the terminal device can determine the reference signal to be tracked according to the reference signal related to the downlink control channel. Since the default mode is used to determine the reference signal to be tracked when the terminal device adjusts the transmission power, the default mode can also be referred to as the "default transmission power determination mode", or the "first mode", or other The name is not limited in the embodiment of this application.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: if the default mode is not enabled, the terminal device tracks the reference signal determined based on the multiple path loss estimation reference signals, The reference signal related to the downlink control channel is not tracked.

In other words, if the default mode is enabled, the terminal device can determine the reference signal to be tracked based on the path loss estimation reference signal indicated by the second information, and ignore the reference signal related to the downlink control channel.

With reference to the first aspect, in some implementation manners of the first aspect, the first information and the second information are sent by the network device through the same signaling. Exemplarily, the network device sends radio resource control (radio resource control, RRC) signaling to the terminal device, and the RRC signaling carries the foregoing first information and second information.

With reference to the first aspect, in some implementation manners of the first aspect, the first information and the second information may be separately sent by a network device within a certain time interval. For example, the network device may send the first information to the terminal device first, and then send the second information to the terminal device. The terminal device starts a timer after receiving the first information, and detects whether the second information is received before the timer expires. After receiving the second information, the network device can determine the path loss estimation reference signal to be tracked according to the method of the embodiment of the present application; if the terminal device does not receive the second information before the timer expires, the network device can determine the path to be tracked in other ways The reference signal for path loss estimation is not limited in this embodiment of the present application. For another example, the network device may first send the second information to the terminal device, and then send the first information to the terminal device, the terminal device starts a timer after receiving the second information, and detects whether the first information is received before the timer expires, If the first information is received, the network device can determine the path loss estimation reference signal to be tracked according to the method of the embodiment of the present application; if the terminal device does not receive the first information before the timer expires, the network device can be based on the second information, Determine the reference signal to be tracked. In other words, the network device may consider that the default mode is not turned on without receiving the first information, and select the reference signal to be tracked from the multiple path loss estimation reference signals configured by the second information.

With reference to the first aspect, in some implementations of the first aspect, the reference signals determined based on the multiple path loss estimation reference signals are the M path losses with the smallest identification among the multiple path loss estimation reference signals Estimated reference signal; or, the reference signal determined based on the multiple path loss estimation reference signals is the M path loss estimation reference signals with the largest identification among the multiple path loss estimation reference signals; where M is a predefined Or a positive integer reported by the terminal device to the network device.

The above identification (ID) can also be replaced with an index (index), which is not limited in the embodiment of the present application.

In a possible implementation manner, the path loss estimation reference signal configured by the network device is a CSI-RS, and the terminal device can select M CSI-RSs with the smallest or largest identities as the reference signals to be tracked.

In another possible implementation manner, the path loss estimation reference signal configured by the network device is a synchronization signal block (SS/PBCH block, SSB), and the terminal device can select the M SSBs with the smallest or largest identification as the to-be-tracked M SSBs. Reference signal.

In another possible implementation manner, the path loss estimation reference signal configured by the network device includes CSI-RS and SSB, and the terminal device can select CSI-RS first, then SSB, or, select SSB first, and then CSI-RS. RS. For example, the network device is configured with 2 CSI-RS and 7 SSB, M=4, the terminal device can select 2 CSI-RS first, and then select the 2 SSB with the smallest identifier or the largest identifier from the 7 SSBs, or, The terminal device can select the SSB first, that is, select the 4 smallest or largest 2 SSBs from the 7 SSBs. For another example, the network device is configured with 5 CSI-RSs and 5 SSBs, M=4, and the terminal device can select 2 CSI-RSs with the smallest or largest identity from the 5 CSI-RSs, and select from the 5 SSBs Identify the smallest or largest 2 SSBs.

It should be understood that when the network device configures the multiple path loss estimation reference signals, each path loss estimation reference signal will be assigned an identifier (for example, PUSCH-PathlossReferenceRS-Id, or PUCCH-PathlossReferenceRS-Id, or SRS-PathlossReferenceRS-Id). ). PUSCH-PathlossReferenceRS-Id is the identifier of the path loss estimation reference signal of PUSCH, PUCCH-PathlossReferenceRS-Id is the identifier of the path loss estimation reference signal of PUCCH, and SRS-PathlossReferenceRS-Id is the identifier of the path loss estimation reference signal of SRS. Each type of reference signal can also have its own identity. For example, the identity of the 3 SSBs configured by the network device for the terminal device (for example, SSB-Index) can be 0~2, and the 5 CSI-Index configured by the network device for the terminal device. The identifier of the RS (for example, NZP-CSI-RS-ResourceId) can be 0-4. Therefore, the foregoing terminal device selects the M reference signals with the smallest or largest identifier, which may be the smallest or largest M reference signals selected by PUSCH-PathlossReferenceRS-Id (or PUCCH-PathlossReferenceRS-Id, or SRS-PathlossReferenceRS-Id). It may select M reference signals with the smallest or largest SSB-Index and/or NZP-CSI-RS-ResourceId. In addition, each PUSCH-PathlossReferenceRS-Id can be associated with one SRI-PUSCH-PowerControlId. In this case, the terminal device can also select M reference signals with the smallest or largest SRI-PUSCH-PowerControlId.

Optionally, considering that the network device configures at least two of PUSCH-PathlossReferenceRS, PUCCH-PathlossReferenceRS and SRS-PathlossReferenceRS for the terminal device, the terminal device may select according to a certain agreed order. Exemplarily, if the network device configures both the PUSCH path loss estimation reference signal for the terminal device and the PUCCH path loss estimation reference signal for the terminal device, then the terminal device can first select PUSCH-PathlossReferenceRS-Id according to PUSCH-PathlossReferenceRS-Id. PathlossReferenceRS, then select PUCCH-PathlossReferenceRS according to PUCCH-PathlossReferenceRS-Id, or first select PUCCH-PathlossReferenceRS according to PUCCH-PathlossReferenceRS-Id, and then select PUSCH-PathlossReferenceRS according to PUSCH-PathlossReferenceRS-Id. Exemplarily, if the network device configures the PUSCH path loss estimation reference signal, the PUCCH path loss estimation reference signal, and the SRS path loss estimation reference signal for the terminal device at the same time, then the terminal device can follow the PUSCH first, then PUCCH, and then The order of SRS is selected, or selected in the order of PUSCH first, SRS second, and PUCCH second, or in other order, which is not limited in the embodiment of the present application.

In summary, the above-mentioned identifier may be at least one of the following: PUSCH-PathlossReferenceRS-Id, PUCCH-PathlossReferenceRS-Id, SRI-PUSCH-PowerControlId, SSB-Index or NZP-CSI-RS-ResourceId, which is the case in the embodiment of this application. Not limited.

With reference to the first aspect, in some implementations of the first aspect, the reference signals determined based on the multiple path loss estimation reference signals are the M paths with the shortest transmission period among the multiple path loss estimation reference signals. Loss estimation reference signal; or, the reference signals determined based on the multiple path loss estimation reference signals are the M path loss estimation reference signals with the longest transmission period among the multiple path loss estimation reference signals; where M It is a positive integer that is predefined or reported by the terminal device to the network device.

It should be understood that the aforementioned path loss estimation reference signal is sent by the network device to the terminal device. Therefore, for the terminal device, the aforementioned transmission period may also be referred to as a measurement period. The two are equivalent. The name is not limited.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the terminal device receives third information from the network device, where the third information is used to indicate a first reference signal; The terminal device obtains a path loss estimation value according to the reference signal tracked by the terminal device and/or the first reference signal; the terminal device adjusts the uplink transmission of the terminal device based on the path loss estimation value Power, where the adjusted uplink transmission power takes effect after the first time period when the terminal device receives the third information.

Specifically, when the network device needs the terminal device to adjust the uplink transmission power, it may send the third information to the terminal device, indicating the first reference signal. The first reference signal may be one reference signal or multiple reference signals, which is not limited in the embodiment of the present application. The terminal device receives the third information, and adjusts the uplink transmission power of the terminal device according to the indication of the third information.

With reference to the first aspect, in some implementations of the first aspect, if the first reference signal belongs to the reference signal tracked by the terminal device, the first time period is X; or, if the All or part of the reference signal in the first reference signal does not belong to the reference signal tracked by the terminal device, then the first time period is X+T; where X is a predefined or pre-configured parameter, and T is all The terminal device measures the length of time during which the first reference signal obtains the path loss estimate value.

Exemplarily, the terminal device may compare the first reference signal indicated by the third information with the reference signal tracked by the terminal device, and if the first reference signal belongs to the reference signal tracked by the terminal device, the terminal device The uplink transmission power of the terminal device can be adjusted directly according to the estimated path loss of the reference signal that has been maintained; if the first reference signal does not belong to the reference signal tracked by the terminal device, the terminal device needs an extra period of time (I.e., the above-mentioned T) to track the first reference signal to obtain an estimated path loss, and then adjust the uplink transmission power of the terminal device according to the obtained estimated path loss. Therefore, the adjusted uplink transmission power of the terminal device takes effect after the first time period after the terminal device receives the third information.

The foregoing X may be a predefined time length, or a time length configured by a network device, or a time length reported by a terminal device, for example, it may be 3 ms, which is not limited in the embodiment of the present application. Optionally, the foregoing third information may be MAC-CE signaling, which is not limited in the embodiment of the present application.

With reference to the first aspect, in some implementations of the first aspect, the default mode is any one of the following: a first default mode, a second default mode, or a third default mode; wherein, in the first default mode, In the mode, the terminal device determines the reference signal to be tracked of the physical uplink shared channel PUSCH according to the reference signal related to the downlink control channel; in the second default mode, the terminal device determines the reference signal related to the downlink control channel The reference signal to be tracked of the physical uplink control channel PUCCH; in the third default mode, the terminal device determines the reference signal to be tracked of the sounding reference signal SRS according to the reference signal related to the downlink control channel.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the terminal device sends first capability information and/or second capability information to the network device, the first capability information It is used to indicate the number of maximum configurable path loss estimation reference signals supported by each carrier component CC, and the second capability information is used to indicate the number of maximum trackable path loss estimation reference signals supported by each CC.

For the first capability information, the network device may determine the number of multiple path loss estimation reference signals configured in the second information according to the first capability information reported by the terminal device. It should be understood that the number of the multiple path loss estimation reference signals is less than or equal to the number reported by the terminal device in the above-mentioned first capability information.

For the second capability information, the terminal device reports the second capability information to the network device, and the second capability information is used to indicate the number M of the maximum traceable path loss estimation reference signals supported by each CC. The network equipment can determine the reference signal tracked by the terminal equipment according to M and the above-mentioned rules.

With reference to the first aspect, in some implementations of the first aspect, the above method further includes: the terminal device sends third capability information and/or fourth capability information to the network device, where the third capability information is used for Indicate the number of maximum configurable path loss estimation reference signals supported by the terminal device, and the fourth capability information is used to indicate the number of maximum traceable path loss estimation reference signals supported by the terminal device.

It should be understood that the number of maximum configurable path loss estimation reference signals supported by the terminal device may be the sum of the number of maximum configurable path loss estimation reference signals supported by all CCs, and the maximum traceable path loss estimation reference signal supported by the terminal device The number of signals may be the sum of the number of maximum trackable path loss estimation reference signals supported by all CCs.

In a second aspect, another method for tracking a reference signal is provided, including: a network device sends first information to a terminal device, where the first information is used to indicate whether a default mode is enabled, and in the default mode, the terminal The device determines the reference signal to be tracked according to the reference signal related to the downlink control channel; the network device sends second information to the terminal device, and the second information is used to configure multiple path loss estimation reference signals; if the default When the mode is turned on, the network device determines that the reference signal tracked by the terminal device is a reference signal determined based on the reference signal related to the downlink control channel, and the untracked reference signal is the multiple path loss estimation reference signals.

Optionally, the method further includes: the network device sending a reference signal, the reference signal including a reference signal related to the downlink control channel and the multiple path loss estimation reference signals.

With reference to the second aspect, in some implementation manners of the second aspect, the first information and the second information are sent by the network device through the same signaling.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: if the default mode is not enabled, the network device determines that the reference signal tracked by the terminal device is based on the multiple path loss estimates The reference signal determined by the reference signal, and the reference signal that is not tracked is the reference signal related to the downlink control channel.

With reference to the second aspect, in some implementations of the second aspect, the reference signals determined based on the multiple path loss estimation reference signals are the M path losses with the smallest identification among the multiple path loss estimation reference signals Estimated reference signal; or, the reference signal determined based on the multiple path loss estimation reference signals is the M path loss estimation reference signals with the largest identification among the multiple path loss estimation reference signals; where M is a predefined Or a positive integer reported by the terminal device to the network device.

With reference to the second aspect, in some implementations of the second aspect, the reference signals determined based on the multiple path loss estimation reference signals are the M paths with the shortest transmission period among the multiple path loss estimation reference signals. Loss estimation reference signal; or, the reference signals determined based on the multiple path loss estimation reference signals are the M path loss estimation reference signals with the longest transmission period among the multiple path loss estimation reference signals; where M It is a positive integer that is predefined or reported by the terminal device to the network device.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the network device sends third information to the terminal device, where the third information is used to indicate the first reference signal, so The third information is used by the terminal device to adjust the uplink transmission power, where the adjusted uplink transmission power takes effect after the first time period when the terminal device receives the third information.

With reference to the second aspect, in some implementations of the second aspect, if the first reference signal belongs to the reference signal tracked by the terminal device, the first time period is X; or, if the All or part of the reference signal in the first reference signal does not belong to the reference signal tracked by the terminal device, then the first time period is X+T; where X is a predefined or pre-configured parameter, and T is all The terminal device measures the length of time during which the first reference signal obtains the path loss estimate value.

With reference to the second aspect, in some implementations of the second aspect, the default mode is any one of the following: a first default mode, a second default mode, or a third default mode; wherein, in the first default mode, In the mode, the terminal device determines the reference signal to be tracked of the physical uplink shared channel PUSCH according to the reference signal related to the downlink control channel; in the second default mode, the terminal device determines the reference signal related to the downlink control channel The reference signal to be tracked of the physical uplink control channel PUCCH; in the third default mode, the terminal device determines the reference signal to be tracked of the sounding reference signal SRS according to the reference signal related to the downlink control channel.

With reference to the second aspect, in some implementations of the second aspect, before the network device sends the second information to the terminal device, the method further includes: the network device receives the first information from the terminal device A capability information, where the first capability information is used to indicate the number of maximum configurable path loss estimation reference signals supported by each carrier component CC; the network device determines the multiple paths according to the first capability information The number of loss estimation reference signals.

With reference to the second aspect, in some implementation manners of the second aspect, the method further includes: the network device receives second capability information from the terminal device, and the second capability information is used to indicate each The number of maximum trackable path loss estimation reference signals supported by each CC.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the network device receives third capability information from the terminal device, and the third capability information is used to indicate that the terminal device supports The maximum configurable number of path loss estimation reference signals, and the network device determines the number of the multiple path loss estimation reference signals according to the third capability information.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the network device receives fourth capability information from the terminal device, where the fourth capability information is used to indicate that the terminal device supports The maximum trackable path loss estimates the number of reference signals.

In a third aspect, another method for tracking reference signals is provided, including: a terminal device receives first information from a network device, the first information is used to configure L basic path loss estimation reference signals, where L is less than or A positive integer equal to 4; the terminal device receives second information from the network device, and the second information is used to configure K additional path loss estimation reference signals, and the K additional path loss estimation reference signals Different from the L basic path loss estimation reference signals, K is a positive integer; the terminal device tracks the L basic path loss estimation reference signals, and does not track the K additional path loss estimation reference signals.

In the embodiment of the present application, the network device may configure two types of path loss estimation reference signals for the terminal equipment, one type is the base path loss estimation reference signal, and the other type is the additional path loss estimation reference signal, where the additional path The loss estimation reference signal does not need to be tracked by the terminal device. In this way, the terminal device can only track the basic path loss estimation reference signal and align with the network device which reference signals the terminal device tracks. If the network device needs the terminal device to adjust the uplink transmission power immediately, it can instruct one of the reference signals tracked by the terminal device. Since the terminal device always maintains the path loss estimate corresponding to the reference signal, it can adjust the uplink transmission power in time. Transmit power without unnecessary adjustment delay; if the network device does not need the terminal device to adjust the uplink transmit power immediately, the network device can indicate the reference signal that the terminal device has not tracked, and the terminal device can use an extra period of time to track The reference signal indicated by the network device obtains the estimated path loss, and then adjusts the uplink transmission power. Since the network device knows that the terminal device has not tracked the reference signal and needs an extra period of time to adjust, the network device will not repeatedly send power adjustment instructions, and signaling redundancy will not occur.

With reference to the third aspect, in some implementation manners of the third aspect, the first information and the second information are sent by the network device through the same signaling. Exemplarily, the network device sends radio resource control (radio resource control, RRC) signaling to the terminal device, and the RRC signaling carries the foregoing first information and second information.

With reference to the third aspect, in some implementation manners of the third aspect, the method further includes: the terminal device receives third information from the network device, where the third information is used to indicate a first reference signal; The terminal device obtains a path loss estimation value according to the reference signal tracked by the terminal device and/or the first reference signal; the terminal device adjusts the uplink transmission of the terminal device based on the path loss estimation value Power, where the adjusted uplink transmission power takes effect after the first time period when the terminal device receives the third information.

With reference to the third aspect, in some implementation manners of the third aspect, if the first reference signals all belong to the L basic path loss estimation reference signals, the first time period is X; or, if If all or part of the reference signals in the first reference signal do not belong to the L basic path loss estimation reference signals, then the first time period is X+T; where X is a predefined or pre-configured parameter , T is the length of time that the terminal device measures the first reference signal to obtain the path loss estimate value.

With reference to the third aspect, in some implementations of the third aspect, the method further includes: the terminal device sends first capability information to the network device, where the first capability information is used to indicate each carrier component The maximum configurable number of additional path loss estimation reference signals supported by CC.

In this way, the network device can determine the number of K additional path loss estimation reference signals configured by the second information according to the first capability information reported by the terminal device. It should be understood that the number K of the K path loss estimation reference signals is less than or equal to the number reported by the terminal device in the above-mentioned first capability information.

In a fourth aspect, another method for tracking reference signals is provided, which includes: a network device sends first information to a terminal device, where the first information is used to configure L basic path loss estimation reference signals, where L is less than or equal to A positive integer of 4; the network device sends second information to the terminal device, and the second information is used to configure K additional path loss estimation reference signals, and the K additional path loss estimation reference signals The L basic path loss estimation reference signals are different, and K is a positive integer; the network device determines that the reference signals tracked by the terminal device are the L basic path loss estimation reference signals, and the reference signals that are not tracked are all The K additional path loss estimation reference signals.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the first information and the second information are sent by the network device through the same signaling.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the method further includes: the network device sends third information to the terminal device, where the third information is used to indicate the first reference signal, so The third information is used by the terminal device to adjust the uplink transmission power, where the adjusted uplink transmission power takes effect after the first time period when the terminal device receives the third information.

With reference to the fourth aspect, in some implementations of the fourth aspect, if the first reference signals all belong to the L first path loss estimation reference signals, the first time period is X; or, if If all or part of the reference signals in the first reference signal do not belong to the L first path loss estimation reference signals, then the first time period is X+T; where X is a predefined or pre-configured parameter , T is the length of time that the terminal device measures the first reference signal to obtain the path loss estimate value.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, before the network device sends the second information to the terminal device, the method further includes: the network device receives the first information sent by the terminal device. Capability information, the first capability information is used to indicate the maximum configurable number of additional path loss estimation reference signals supported by each carrier component CC; the network device determines the K according to the first capability information An additional path loss estimates the number of reference signals.

In a fifth aspect, a device for tracking a reference signal is provided, which is used to execute the method in any one of the possible implementation manners of the foregoing aspects. Specifically, the device includes a unit for executing the method in any one of the possible implementation manners of the foregoing aspects.

In a sixth aspect, a device for tracking a reference signal is provided, including a processor, which is coupled to a memory and can be used to execute instructions in the memory to implement the method in any one of the possible implementation manners of the foregoing aspects. Optionally, the communication device further includes a memory. Optionally, the communication device further includes a communication interface, and the processor is coupled with the communication interface.

In an implementation manner, the device for tracking the reference signal is a terminal device. When the device for tracking the reference signal is a terminal device, the communication interface may be a transceiver, or an input/output interface.

In another implementation manner, the device for tracking the reference signal is a chip configured in a terminal device. When the device for tracking the reference signal is a chip configured in a terminal device, the communication interface may be an input/output interface.

In a seventh aspect, a processor is provided, including: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in any one of the possible implementation manners of the foregoing aspects.

In the specific implementation process, the above-mentioned processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, and various logic circuits. The input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to the transmitter and transmitted by the transmitter, and the input circuit and output The circuit can be the same circuit, which is used as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation manners of the processor and various circuits.

In an eighth aspect, a processing device is provided, including a processor and a memory. The processor is used to read instructions stored in the memory, and can receive signals through a receiver, and transmit signals through a transmitter, so as to execute the method in any one of the possible implementation manners of the foregoing aspects.

Optionally, there are one or more processors, and one or more memories.

Optionally, the memory may be integrated with the processor, or the memory and the processor may be provided separately.

In the specific implementation process, the memory can be a non-transitory (non-transitory) memory, such as a read only memory (ROM), which can be integrated with the processor on the same chip, or can be set in different On the chip, the embodiment of the present application does not limit the type of the memory and the setting mode of the memory and the processor.

It should be understood that the related data interaction process, for example, sending instruction information may be a process of outputting instruction information from the processor, and receiving capability information may be a process of receiving input capability information by the processor. Specifically, the processed output data may be output to the transmitter, and the input data received by the processor may come from the receiver. Among them, the transmitter and receiver can be collectively referred to as a transceiver.

The processing device in the above eighth aspect may be a chip, and the processor may be implemented by hardware or software. When implemented by hardware, the processor may be a logic circuit, an integrated circuit, etc.; when implemented by software When implemented, the processor may be a general-purpose processor, which is implemented by reading software codes stored in the memory. The memory may be integrated in the processor, may be located outside the processor, and exist independently.

In a ninth aspect, a computer program product is provided. The computer program product includes: a computer program (also called code, or instruction), which when the computer program is executed, causes a computer to execute any of the above aspects. One of the possible implementation methods.

In a tenth aspect, a computer-readable medium is provided, and the computer-readable medium stores a computer program (also called code, or instruction) when it runs on a computer, so that the computer executes any of the above aspects. One of the possible implementation methods.

In an eleventh aspect, a communication system is provided, including the aforementioned terminal device and network device.

Description of the drawings

Fig. 1 shows a schematic diagram of a communication system according to an embodiment of the present application.

Fig. 2 shows a schematic flowchart of a method for tracking a reference signal according to an embodiment of the present application.

FIG. 3 shows a schematic flowchart of another method for tracking a reference signal according to an embodiment of the present application.

Fig. 4 shows a schematic block diagram of an apparatus for tracking a reference signal according to an embodiment of the present application.

FIG. 5 shows a schematic block diagram of another device for tracking a reference signal according to an embodiment of the present application.

Detailed ways

The technical solution in this application will be described below in conjunction with the accompanying drawings.

The technical solutions of the embodiments of this application can be applied to various communication systems, such as: global system for mobile communications (GSM) system, code division multiple access (CDMA) system, broadband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE Time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, the future fifth generation (5th generation, 5G) system or new radio (NR), etc.

It should also be understood that the technical solutions of the embodiments of the present application can also be applied to various communication systems based on non-orthogonal multiple access technologies, such as sparse code multiple access (SCMA) systems. Of course, SCMA is The field of communication can also be called other names; further, the technical solutions of the embodiments of the present application can be applied to a multi-carrier transmission system using non-orthogonal multiple access technology, for example, using non-orthogonal multiple access technology orthogonal Frequency division multiplexing (orthogonal frequency division multiplexing, OFDM), filter bank multi-carrier (FBMC), general frequency division multiplexing (generalized frequency division multiplexing, GFDM), filtered orthogonal frequency division multiplexing ( filtered-OFDM, F-OFDM) system, etc.

In order to facilitate the understanding of the embodiments of the present application, a communication system applicable to the embodiments of the present application is first described in detail with reference to FIG. 1. Fig. 1 shows a schematic diagram of a communication system suitable for an embodiment of the present application. As shown in FIG. 1, the communication system 100 may include at least one network device, such as the network device 110 shown in FIG. 1; the communication system 100 may also include at least one terminal device, such as the terminal device 120 shown in FIG. 1. The network device 110 and the terminal device 120 may communicate through a wireless link. Each communication device, such as the network device 110 or the terminal device 120, may be configured with multiple antennas, and the multiple antennas may include at least one transmitting antenna for transmitting signals and at least one receiving antenna for receiving signals. In addition, each communication device additionally includes a transmitter chain and a receiver chain. Those of ordinary skill in the art can understand that they can all include multiple components related to signal transmission and reception (such as processors, modulators, multiplexers, etc.). , Demodulator, demultiplexer or antenna, etc.). Therefore, the network device 110 and the terminal device 120 can communicate through multi-antenna technology.

The terminal equipment in the embodiments of this application may communicate with one or more core networks via a radio access network (RAN). The terminal equipment may be referred to as an access terminal, user equipment (UE), Subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The access terminal can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network, or terminals in the future evolved public land mobile network (PLMN) Equipment, etc.

The network device in the embodiment of the application may be a device used to communicate with terminal devices. The network device may be a global system for mobile communications (GSM) system or code division multiple access (CDMA) The base transceiver station (BTS) in the LTE system can also be the base station (NodeB, NB) in the wideband code division multiple access (WCDMA) system, or the evolved base station (evolved) in the LTE system. NodeB, eNB or eNodeB), it can also be a wireless controller in a cloud radio access network (CRAN) scenario, or the network device can be a relay station, an access point, a vehicle-mounted device, a wearable device, and the future The network equipment in the 5G network or the network equipment in the future evolved PLMN network, etc., are not limited in the embodiment of the present application. For example, the gNB in the NR system, or the transmission point (TRP or TP), one or a group of antenna panels (including multiple antenna panels) of the base station in the 5G system, or the network that constitutes the gNB or transmission point Nodes, such as baseband unit (BBU), or distributed unit (DU), etc.

In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include a radio unit (RU). CU implements some functions of gNB, DU implements some functions of gNB, for example, CU implements radio resource control (radio resource control, RRC), packet data convergence protocol (packet data convergence protocol, PDCP) layer functions, and DU implements wireless link Functions of the radio link control (RLC) layer, media access control (MAC) layer, and physical (PHY) layer. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by the DU , Or, sent by DU+CU. It can be understood that the network device may be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU can be divided into network equipment in an access network (radio access network, RAN), and the CU can also be divided into network equipment in a core network (core network, CN), which is not limited in this application.

The above-mentioned network equipment may also refer to a general term for all equipment on the network side. For example, when multiple TRPs are used to transmit data to a terminal device, the multiple TRPs may be collectively referred to as network equipment.

In the embodiment of the present application, the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory). The operating system can be any one or more computer operating systems that implement business processing through processes, for example, Linux operating systems, Unix operating systems, Android operating systems, iOS operating systems, or windows operating systems. The application layer includes applications such as browsers, address books, word processing software, and instant messaging software. Moreover, the embodiments of the application do not specifically limit the specific structure of the execution body of the method provided in the embodiments of the application, as long as the program that records the codes of the methods provided in the embodiments of the application can be provided in accordance with the embodiments of the application. For example, the execution subject of the method provided in the embodiments of the present application may be a terminal device or a network device, or a functional module in the terminal device or the network device that can call and execute the program.

In addition, various aspects or features of the present application can be implemented as methods, devices, or products using standard programming and/or engineering techniques. The term "article of manufacture" used in this application encompasses a computer program accessible from any computer-readable device, carrier, or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (for example, hard disks, floppy disks or tapes, etc.), optical disks (for example, compact discs (CD), digital versatile discs (DVD)) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.). In addition, various storage media described herein may represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.

The embodiments of this application can be applied to LTE systems and subsequent evolutionary systems such as 5G, etc., or other wireless communication systems that use various wireless access technologies, such as code division multiple access, frequency division multiple access, time division multiple access, and orthogonality. Frequency division multiple access, single carrier frequency division multiple access and other access technology systems are especially suitable for scenarios that require channel information feedback and/or apply secondary precoding technology, such as wireless networks using Massive MIMO technology, and distributed antennas Technology of wireless networks, etc.

It should be understood that multiple-input multiple-output (MIMO) technology refers to the use of multiple transmitting antennas and receiving antennas in the transmitting end device and the receiving end device, respectively, so that the signal passes through multiple of the transmitting end device and the receiving end device. The antenna transmits and receives, thereby improving the communication quality. It can make full use of space resources and achieve multiple transmissions and multiple receptions through multiple antennas. Without increasing the spectrum resources and antenna transmission power, the system channel capacity can be doubled.

For ease of understanding, the relevant terms involved in the embodiments of the present application are first introduced below.

1. Road loss estimation

In cellular network communication, the parameters used to determine the uplink transmission power of the terminal equipment are configured by the network equipment. The purpose of uplink power control is to make the power of the signal sent by the terminal device reach the network device to meet the receiving condition of the network device. For example, the network device requires the power of the signal sent by the terminal device to reach the network device to be P0. Since the distance between each terminal device and the network device is different, the terminal device needs to estimate the path loss (pathloss, PL) in signal transmission to adjust the uplink transmission power. The path loss is abbreviated as "path loss", and the estimation of path loss is abbreviated as "path loss estimation". Path loss estimation is usually realized by measuring the received power of a path loss reference signal (pathloss reference signal, PL RS) configured by a network device by a terminal device. To put it simply, path loss estimate = PL RS transmit power-PL RS received power, and the uplink transmit power of the terminal device = P0 + path loss estimate. The transmit power and P0 of the network device here are configured by the network device.

2. Pathloss reference signal (PL RS)

The path loss reference signal may also be referred to as a path loss estimation reference signal. The terminal device can adjust the transmission power based on the path loss estimation value obtained above. In order to obtain the estimated path loss, the network equipment needs to be configured with PL RS so that the terminal equipment can track. Tracking includes periodic measurement and maintenance of the path loss measurement results corresponding to each PL RS. It should be understood that PL RS is a periodic reference signal, and PL RS is a general term for reference signals used for path loss estimation. The reference signal used for path loss estimation may be, for example, a synchronization signal block (SS/PBCH block, SSB) or channel status information reference signal (Channel status information reference signal, CSI-RS). In other words, this article refers to the reference signal configured by the network device for the terminal device and used for path loss estimation as PL RS.

Taking into account the changes in the transmission environment brought about by the mobility of terminal equipment, especially in high-frequency communications (such as millimeter wave communications), it is also necessary to consider the changes in the transmitting beam of the terminal equipment and the receiving beam of the network equipment, and the configuration of the network equipment PL RS usually has more than one. Version 15 (release 15, R15) allows network devices to be configured with a maximum of 4 PL RSs. The terminal should track the PL RS configured by all network devices, so that the network device can make dynamic adjustments. That is, the network device dynamically indicates one of the four PL RSs, and the terminal device can adjust its transmission power immediately. In order to better support the transmission power change demand caused by the transmission beam change in high-frequency communication, version 16 (release 16, R16) allows network devices to configure a maximum of 64 PL RSs. In order not to increase the measurement and maintenance burden of the terminal equipment, the terminal equipment still only needs to track 4 of the PL RSs. When a network device dynamically indicates a PL RS, if it is a PL RS that the terminal device has not tracked, the terminal device needs an extra period of time to measure the PL RS, and then determine the path loss estimate and the transmission power; if this is For a PL RS tracked by a terminal device, since the terminal device always maintains the estimated path loss, the terminal device can immediately adjust the transmission power without measuring.

In view of this, the embodiments of the present application provide a method and device for tracking reference signals, which can determine the reference signals tracked by terminal equipment based on specific rules, so that the terminal equipment and network equipment align which reference signals the terminal equipment tracks, which is beneficial to Improve the efficiency of network equipment adjusting uplink transmission power for terminal equipment, and save signaling overhead.

Before introducing the method provided by the embodiment of the present application, the following points are explained first.

First, in the embodiments of this application, "pre-definition" can be implemented by pre-saving corresponding codes, tables, or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices). There is no limitation on its specific implementation.

Second, in the embodiments shown below, various terms and abbreviations, such as media access control-control element (MAC-CE), radio resource control (RRC), The physical downlink control channel (PDCCH), the physical downlink shared channel (PDSCH), the channel state information reference signal (CSI-RS), etc., are all illustrative examples given for convenience of description. This application should not constitute any limitation. This application does not exclude the possibility of defining other terms that can achieve the same or similar functions in existing or future agreements.

Third, in the embodiments shown below, the first, second, and various numerical numbers are only for easy distinction for description, and are not used to limit the scope of the embodiments of the present application. For example, distinguish different reference signals, distinguish different information, and so on.

Fourth, the “protocols” involved in the embodiments of the present application may refer to standard protocols in the communication field, for example, may include LTE protocol, NR protocol, and related protocols applied to future communication systems, which are not limited in this application.

Fifth, "at least one" refers to one or more, and "multiple" refers to two or more. "And/or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the associated objects before and after are in an "or" relationship. "The following at least one item (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or a plurality of items (a). For example, at least one of a, b, and c can mean: a, or b, or c, or a and b, or a and c, or b and c, or a, b and c, where a, b, c can be single or multiple.

The method and device for tracking reference signals provided by the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the technical solution of the present application can be applied to a wireless communication system, for example, the communication system 100 shown in FIG. 1. There may be a wireless communication connection relationship between two communication devices in the wireless communication system, and one of the two communication devices may correspond to the terminal device 120 shown in FIG. 1, for example, it may be as shown in FIG. The terminal device shown may also be a chip configured in the terminal device; the other communication device of the two communication devices may correspond to the network device 110 shown in FIG. 1, for example, it may be the chip shown in FIG. The network device may also be a chip configured in the network device.

Hereinafter, without loss of generality, the method for tracking a reference signal provided by the embodiment of the present application will be described in detail by taking the interaction process between the terminal device and the network device as an example.

FIG. 2 shows a schematic flowchart of a method 200 for tracking a reference signal provided by an embodiment of the present application. This method can be applied to the communication system shown in FIG. 1, but the embodiment of the present application does not limit this. The method 200 includes:

S210: The network device sends first information to the terminal device, and the terminal device receives the first information correspondingly; the first information is used to indicate whether the default mode is turned on. In the default mode, the terminal device is related to the downlink control channel. The reference signal determines the reference signal to be tracked.

S220: The network device sends second information to the terminal device, and correspondingly, the terminal device receives the second information; the second information is used to configure multiple path loss estimation reference signals.

S230: If the default mode is enabled, the terminal device tracks the reference signal determined based on the reference signal related to the downlink control channel, and does not track the multiple path loss estimation reference signals configured by the second information. In other words, if the default mode is enabled, the terminal device can determine the reference signal to be tracked based on the reference signal related to the downlink control channel, and ignore the path loss estimation reference signal indicated by the second information.

As an optional embodiment, the method further includes: if the default mode is not enabled, the terminal device tracks the reference signal determined based on the multiple path loss estimation reference signals, and does not track the reference signal related to the downlink control channel. In other words, if the default mode is not enabled, the terminal device can determine the reference signal to be tracked based on the path loss estimation reference signal indicated by the second information, and ignore the reference signal related to the downlink control channel.

In the embodiment of the present application, the terminal device may determine the reference signal tracked by the terminal device according to whether the default mode is turned on. Since whether the default mode is turned on is notified by the network device to the terminal device through the first information, the network device may also determine the reference signal tracked by the terminal device according to whether the default mode is turned on. Specifically, the network device indicates to the terminal device whether the default mode is enabled. When the default mode is enabled, the terminal device can determine the reference signal to be tracked according to the reference signal related to the downlink control channel, that is, the terminal device tracking is based on the downlink control channel The reference signal determined by the related reference signal does not track the multiple path loss estimation reference signals configured by the network device through the second information; when the default mode is not turned on, the terminal device can track multiple paths configured based on the second information. The reference signal determined by the loss estimation reference signal does not track the reference signal related to the downlink control channel. Once the network device has determined whether to enable the default mode for the terminal device, it can determine the reference signal tracked by the terminal device.

In this way, both the network device and the terminal device can determine which reference signals are the reference signals to be tracked according to whether the default mode is turned on, so that the terminal device and the network device align which reference signals the terminal device has tracked. If the network device subsequently needs the terminal device to adjust the uplink transmission power, it can determine an appropriate reference signal and indicate the reference signal to the terminal device. If the reference signal is one of the reference signals tracked by the terminal device, since the terminal device always maintains the estimated path loss corresponding to the reference signal, the uplink transmission power can be adjusted in time without unnecessary adjustments. Time delay; if the reference signal is a reference signal that the terminal device has not tracked, the terminal device can use an extra period of time to track the reference signal indicated by the network device, obtain the path loss estimate, and then adjust the uplink transmission power. Since the network device knows that the terminal device has not tracked the reference signal and needs an extra period of time to adjust, the network device will not repeatedly send power adjustment instructions, and there will be no signaling redundancy.

It should be understood that the aforementioned default mode refers to a reference mode specified by the protocol without an explicit indication. In the default mode, the terminal device can determine the reference signal to be tracked according to the reference signal related to the downlink control channel. Since the default mode is used to determine the reference signal to be tracked when the terminal device adjusts the transmit power, the default mode can also be referred to as the "default transmit power determination mode", or the "first mode", or other The name is not limited in the embodiment of this application.

The above-mentioned "reference signal related to the downlink control channel" specifically refers to: the transmission configuration indication (transmission configuration indication, TCI) state (TCI-state) of the control resource set (control resource set, CORESET) with the smallest index. -co-location, QCL) reference signal resources of type D (QCL-Type D), or the quasi-co-location (QCL) hypothesis of the control resource set (control resource set, CORESET) with the smallest index QCL-Type D (QCL-Type D) reference signal resource. (a RS resource with "QCL-Type D" in the TCI-state or the QCL assumption of a CORESET with the lowest index in the active DL BWP of the scheduling cell for the serving cell.)

Optionally, the above-mentioned default mode is any one of the following: a first default mode, a second default mode, or a third default mode; wherein, in the first default mode, the terminal device according to the downlink control channel related The reference signal determines the reference signal to be tracked of the physical uplink shared channel PUSCH; in the second default mode, the terminal device determines the reference signal to be tracked of the physical uplink control channel PUCCH according to the reference signal related to the downlink control channel; In the third default mode, the terminal device determines a reference signal to be tracked of a sounding reference signal (SRS) according to a reference signal related to a downlink control channel.

Exemplarily, the first default mode may be used for the terminal device to determine the reference signal to be tracked of the PUSCH according to the reference signal related to the downlink control channel. If the first default mode is enabled, the terminal device can determine the reference signal to be tracked based on the reference signal related to the downlink control channel; if the first default mode is not enabled, the terminal device cannot determine the reference signal to be tracked based on the reference signal related to the downlink control channel Therefore, when the first default mode is configured, the network device also configures multiple path loss estimation reference signals through the above-mentioned second information. When the first default mode is not enabled, the terminal device can be based on the multiple path loss estimation reference signals. The path loss estimation reference signal determines the reference signal to be tracked. Optionally, the PUSCH may be a PUSCH scheduled by DCI format 0_0. For example, the first default mode may be recorded as enableDefaultBeamPlForPUSCH0_0, for PUSCH scheduled by DCI format 0_0. It should be noted that in addition to the PUSCH scheduled by the DCI of the DCI format 0_0, there are also the PUSCH scheduled by the DCI of the DCI format 0_1. For the PUSCH scheduled by the DCI of the DCI format 0_0, when the first default mode is turned on, the terminal device can The reference signal to be tracked is determined according to the reference signal related to the downlink control channel; and for the PUSCH scheduled by the DCI of the DCI format 0_1, the terminal device can follow the uplink scheduling request indication (schduling request indication, SRI) field in the DCI of the DCI format 0_1 Determine the reference signal that the network device requires the terminal device to track.

Exemplarily, the second default mode may be used for the terminal device to determine the PUCCH reference signal to be tracked according to the reference signal related to the downlink control channel. For example, the second default mode may be recorded as enableDefaultBeamPlForPUCCH, for dedicated PUCCH.

Exemplarily, the third default mode may be used for the terminal device to determine the reference signal to be tracked of the SRS according to the reference signal related to the downlink control channel. For example, the third default mode may be recorded as enableDefaultBeamPlForSRS, for dedicated SRS.

It should be understood that in addition to the names listed above, these default modes may also have other names, that is, the embodiment of the present application does not limit the names of the first default mode, the second default mode, and the third default mode.

In the first information, taking the first default mode as an example, the specific signaling that the first default mode is turned on is embodied as the enableDefaultBeamPlForPUSCH0_0 field whose value is ON or enable; the specific signaling that the first default mode is not turned on is embodied as enableDefaultBeamPlForPUSCH0_0 The value of the field is OFF or disable, or the entire field is not configured (absent), which is not limited in the embodiment of the present application. The second default mode is similar to the third default mode, and will not be listed here.

The following describes in detail how the terminal device determines the reference signal to be tracked when the default mode is not turned on.

As described above, if the default mode is not enabled, the terminal device can track the reference signal determined based on the multiple path loss estimation reference signals configured by the second information, and not the reference signal related to the downlink control channel. However, since the number of reference signals that can be tracked by the terminal device is limited (for example, the terminal device can track up to 4 reference signals), if the number of path loss estimation reference signals configured by the second information is greater than the number of reference signals that can be tracked by the terminal device (In a possible implementation manner, the second information is used to indicate 64 PL RS), then, the terminal device can select the reference signal to be tracked from the multiple path loss estimation reference signals in the following manner.

1. The terminal device can select the M path loss estimation reference signals with the smallest identifier or the largest identifier among the multiple path loss estimation reference signals.

As an optional embodiment, the reference signals determined based on the multiple path loss estimation reference signals are the M path loss estimation reference signals with the smallest identification among the multiple path loss estimation reference signals; or, the The reference signals determined based on the multiple path loss estimation reference signals are the M path loss estimation reference signals with the largest identifiers among the multiple path loss estimation reference signals; where M is a predefined or the terminal device sends to the A positive integer reported by the network device.

In another possible implementation manner, the path loss estimation reference signal configured by the network device is the SSB, and the terminal device may select the M SSBs with the smallest or largest identification as the reference signals to be tracked.

It should be understood that when the network device configures the multiple path loss estimation reference signals, each path loss estimation reference signal will be assigned an identifier (for example, PUSCH-PathlossReferenceRS-Id, or PUCCH-PathlossReferenceRS-Id, or SRS-PathlossReferenceRS-Id). ). PUSCH-PathlossReferenceRS-Id is the identifier of the path loss estimation reference signal of PUSCH, PUCCH-PathlossReferenceRS-Id is the identifier of the path loss estimation reference signal of PUCCH, and SRS-PathlossReferenceRS-Id is the identifier of the path loss estimation reference signal of SRS. Each type of reference signal can also have its own identity. For example, the identity of the 3 SSBs configured by the network device for the terminal device (for example, SSB-Index) can be 0~2, and the 5 CSI-Index configured by the network device for the terminal device. The identifier of the RS (for example, NZP-CSI-RS-ResourceId) can be 0-4. Therefore, the foregoing terminal device selects the M reference signals with the smallest or largest identifier, which may be the smallest or largest M reference signals selected by PUSCH-PathlossReferenceRS-Id (or PUCCH-PathlossReferenceRS-Id, or SRS-PathlossReferenceRS-Id). It may select M reference signals with the smallest or largest SSB-Index and/or NZP-CSI-RS-ResourceId. To facilitate the distinction, this application refers to PUSCH-PathlossReferenceRS-Id, or PUCCH-PathlossReferenceRS-Id, or SRS-PathlossReferenceRS-Id as the identifier of the path loss estimation reference signal, and SSB-Index and NZP-CSI-RS-ResourceId as The resource identifier of the reference signal. In addition, each PUSCH-PathlossReferenceRS-Id can be associated with one SRI-PUSCH-PowerControlId. In this case, the terminal device can also select M reference signals with the smallest or largest SRI-PUSCH-PowerControlId.

Optionally, considering that the network device configures at least two of PUSCH-PathlossReferenceRS, PUCCH-PathlossReferenceRS, and SRS-PathlossReferenceRS for the terminal device, the terminal device can select according to a certain agreed order. Exemplarily, if the network device configures both the PUSCH path loss estimation reference signal for the terminal device and the PUCCH path loss estimation reference signal for the terminal device, then the terminal device can first select PUSCH-PathlossReferenceRS-Id according to PUSCH-PathlossReferenceRS-Id. PathlossReferenceRS, then select PUCCH-PathlossReferenceRS according to PUCCH-PathlossReferenceRS-Id, or first select PUCCH-PathlossReferenceRS according to PUCCH-PathlossReferenceRS-Id, and then select PUSCH-PathlossReferenceRS according to PUSCH-PathlossReferenceRS-Id. Exemplarily, if the network device configures the PUSCH path loss estimation reference signal, the PUCCH path loss estimation reference signal, and the SRS path loss estimation reference signal for the terminal device at the same time, then the terminal device can follow the PUSCH first, then PUCCH, and then The order of SRS is selected, or selected in the order of PUSCH first, SRS second, and PUCCH second, or in other order, which is not limited in the embodiment of the present application.

As an optional embodiment, considering that the above-mentioned default modes include the first default mode, the second default mode, and the third default mode, for the first default mode, that is, for the PUSCH, the terminal device may select the smallest PUSCH-PathlossReferenceRS-Id or The largest M reference signals are used as the reference signals tracked by the terminal device; for the second default mode, that is, for PUCCH, the terminal device can select the M reference signals with the smallest or largest PUCCH-PathlossReferenceRS-Id as the reference signals tracked by the terminal device. Reference signal; For the third default mode, that is, for SRS, the terminal device can select M reference signals with the smallest or largest SRS-PathlossReferenceRS-Id as the reference signals tracked by the terminal device.

As an optional embodiment, if the network device configures at least two of PUSCH-PathlossReferenceRS, PUCCH-PathlossReferenceRS, and SRS-PathlossReferenceRS for the terminal device, the network device should ensure the same path loss estimation reference signal identifier (for example, PUSCH-PathlossReferenceRS). The reference signals of PathlossReferenceRS-Id, PUCCH-PathlossReferenceRS-Id and SRS-PathlossReferenceRS-Id also have the same resource identifier (for example, SSB-Index or NZP-CSI-RS-ResourceId). That is to say, the same path loss estimation reference signal identifier indicates the same reference signal. Exemplarily, the network device configures PUSCH-PathlossReferenceRS and SRS-PathlossReferenceRS for the terminal device, and the M reference signals determined by the terminal device according to the PUSCH-PathlossReferenceRS-Id are the same as the M reference signals determined by the terminal device according to the SRS-PathlossReferenceRS-Id. In this way, the terminal device does not need to track different M reference signals separately for each uplink channel or signal, which reduces the complexity and power consumption of the terminal device.

2. The terminal device can select the M path loss estimation reference signals with the longest transmission period or the shortest transmission period among the multiple path loss estimation reference signals.

As an optional embodiment, the reference signals determined based on the multiple path loss estimation reference signals are M path loss estimation reference signals with the shortest transmission period among the multiple path loss estimation reference signals; or, The reference signals determined based on the multiple path loss estimation reference signals are M path loss estimation reference signals with the longest transmission period among the multiple path loss estimation reference signals; where M is a predefined or the terminal device A positive integer reported to the network device.

In a possible implementation manner, the path loss estimation reference signal configured by the network device is a CSI-RS, and the terminal device can select M CSI-RSs with the longest transmission period or the shortest transmission period as the reference signals to be tracked.

In another possible implementation manner, the path loss estimation reference signal configured by the network device is an SSB, and the terminal device may select M SSBs with the longest or shortest transmission period as the reference signals to be tracked.

In another possible implementation manner, the path loss estimation reference signal configured by the network device includes CSI-RS and SSB, and the terminal device can select CSI-RS first, then SSB, or, select SSB first, and then CSI-RS. RS. For example, the network device is configured with 2 CSI-RS and 7 SSB, M=4, the terminal device can select 2 CSI-RS first, and then select the 2 SSB with the longest transmission period or the shortest transmission period from the 7 SSBs Or, the terminal device can select the SSB first, that is, select 4 SSBs with the longest transmission period or the 2 SSBs with the shortest transmission period from the 7 SSBs. For another example, the network device is configured with 5 CSI-RS and 5 SSB, M=4, the terminal device can select the 2 CSI-RS with the longest transmission period or the shortest transmission period from the 5 CSI-RS, from 5 CSI-RS The 2 SSBs with the longest or shortest transmission period are selected in the SSB.

The foregoing M may be a predefined positive integer, or a positive integer reported by the terminal device to the network device. Optionally, M may be reported to the network device by the terminal device through capability information (referred to herein as the second capability information), that is, the terminal device reports the second capability information to the network device, and the second capability information is used to indicate each CC The number M of the maximum trackable path loss estimation reference signal supported. The network equipment can determine the reference signal tracked by the terminal equipment according to M and the above-mentioned rules.

In a possible implementation manner, the foregoing first information and second information are sent by the network device through the same signaling. Exemplarily, the network device sends radio resource control (radio resource control, RRC) signaling to the terminal device, and the RRC signaling carries the foregoing first information and second information.

In another possible implementation manner, the foregoing first information and second information may be separately sent by a network device within a certain time interval. For example, the network device may send the first information to the terminal device first, and then send the second information to the terminal device. The terminal device starts a timer after receiving the first information, and detects whether the second information is received before the timer expires. After receiving the second information, the network device can determine the path loss estimation reference signal to be tracked according to the method of the embodiment of the present application; if the terminal device does not receive the second information before the timer expires, the network device can determine the path to be tracked in other ways The reference signal for path loss estimation is not limited in this embodiment of the present application. For another example, the network device may first send the second information to the terminal device, and then send the first information to the terminal device, the terminal device starts a timer after receiving the second information, and detects whether the first information is received before the timer expires, If the first information is received, the network device can determine the path loss estimation reference signal to be tracked according to the method of the embodiment of the present application; if the terminal device does not receive the first information before the timer expires, the network device can be based on the second information, Determine the reference signal to be tracked. In other words, the network device may consider that the default mode is not turned on without receiving the first information, and select the reference signal to be tracked from the multiple path loss estimation reference signals configured by the second information.

Optionally, before S230, the above method 200 further includes S240. The network device sends a reference signal to the terminal device. The reference signal includes the reference signal related to the downlink control channel and multiple path loss estimation reference signals. The terminal device can select the reference signal for tracking according to the above method, that is, measure the reference signal and maintain the path loss estimation value of the corresponding reference signal.

Optionally, the method 200 further includes:

S250: The network device sends third information to the terminal device, and correspondingly, the terminal device receives the third information; the third information is used to indicate the first reference signal;

S260: The terminal device adjusts the uplink transmission power based on the obtained path loss estimation value.

In the embodiment of the present application, the adjusted uplink transmission power takes effect after the first time period when the terminal device receives the third information. That is, the effective time of the adjusted uplink transmission power is: the time when the terminal device receives the third information plus the first time period. Before the adjusted uplink transmit power takes effect, the terminal device can perform one or more of the following steps:

1. The terminal device can continue to use the path loss estimation value of the path loss estimation reference signal indicated by the previous network device.

2. The terminal device can continue to track the path loss estimation reference signal indicated by the previous network device.

3. The terminal equipment can use a default path loss estimation reference signal path loss estimation value.

4. The terminal equipment can track a default path loss estimation reference signal.

It should be understood that the "previous path loss estimation reference signal indicated by the network device" refers to: before the terminal device receives the third information from the network device, the network device indicates the path loss estimation reference signal to the terminal device through other information. The above-mentioned "default path loss estimation reference signal" may be a reference signal in a random access process, or a path loss estimation reference signal last used by a terminal device, which is not limited in this embodiment of the application.

As an optional embodiment, if the first reference signal belongs to the reference signal tracked by the terminal device, the first time period is X; or, if all or all of the first reference signals are Part of the reference signal does not belong to the reference signal tracked by the terminal device, then the first time period is X+T; where X is a predefined or pre-configured parameter, and T is the terminal device measuring the first The length of time the reference signal obtains the estimated path loss value.

Exemplarily, the terminal device may compare the first reference signal indicated by the third information with the reference signal tracked by the terminal device, and if the first reference signal belongs to the reference signal tracked by the terminal device, the terminal device The uplink transmission power of the terminal device can be adjusted directly according to the estimated path loss of the reference signal that has been maintained; if the first reference signal does not belong to the reference signal tracked by the terminal device, the terminal device needs an extra period of time (I.e., the above-mentioned T) to track the first reference signal to obtain an estimated path loss, and then adjust the uplink transmission power of the terminal device according to the obtained estimated path loss. Therefore, the adjusted uplink transmission power of the terminal device takes effect after the first time period when the terminal device receives the third information.

The foregoing X may be a predefined time length, a time length configured by a network device, or a time length reported by a terminal device, which is not limited in the embodiment of the present application. Exemplarily, X may be used for the terminal device to interpret the content of the third information, for example, X=3ms. Exemplarily, X may be used for the terminal device to interpret the content of the third information, and to deliver the obtained path loss estimation value from the upper layer of the terminal device to the physical layer of the terminal device. For example, X=5ms, where 3ms is used for the terminal device to interpret the content of the third information, and 2ms is used for the terminal device to deliver the obtained path loss estimation value from the upper layer of the terminal device to the physical layer of the terminal device.

The foregoing T is the time period for the terminal device to measure the first reference signal to obtain the path loss estimate. Illustratively, T may be the time period for the terminal device to measure the first reference signal to obtain multiple (for example, 5) measurement samples. However, the embodiment of the present application does not limit this.

Optionally, the foregoing third information may be MAC-CE signaling, which is not limited in the embodiment of the present application.

As an optional embodiment, the above method further includes: the terminal device sends first capability information and/or second capability information to the network device, where the first capability information is used to indicate the maximum configurable capacity supported by each carrier component CC The number of path loss estimation reference signals, and the second capability information is used to indicate the maximum trackable number of path loss estimation reference signals supported by each CC.

In this way, the network device can determine the number of multiple path loss estimation reference signals configured by the second information according to the first capability information reported by the terminal device. It should be understood that the number of the multiple path loss estimation reference signals is less than or equal to the number reported by the terminal device in the above-mentioned first capability information.

As an optional embodiment, the above method further includes: the terminal device sends third capability information and/or fourth capability information to the network device, where the third capability information is used to indicate the maximum configurable path loss estimation supported by the terminal device The number of reference signals, where the fourth capability information is used to indicate the number of maximum trackable path loss estimation reference signals supported by the terminal device.

In the following, the method 200 of the embodiment of the present application will be introduced in detail with reference to a specific example.

The network device can send RRC signaling to the terminal device, and the terminal device is configured with the following information through the RRC signaling:

1. Whether to enable the default mode, that is, the above first information;

2. Configuration information related to the downlink control channel. Among them, the configuration of the PDCCH CORESET TCI-state is mainly related to the embodiment of the present application. Exemplarily, according to the R16 standard, each carrier component (CC) can only have one BWP in the active mode. Each BWP of each CC can be configured with multiple CORESETs, and each CORESET is identified by its ID. CORESET ID is unique in CC. For each CORESET, one or more TCI-states can be configured through tci-StatesPDCCH-ToAddList and tci-StatesPDCCH-ToReleaseList. If the number of TCI-states configured for each CORESET is greater than 1, then which TCI-state is used specifically requires the network device to send MAC-CE signaling for activation. Each TCI-state contains 1 or 2 QCL types, and each QCL type corresponds to a reference signal. According to the existing protocol specifications, the reference signal corresponding to QCL type D can be used as the PL RS in the default mode. However, it should be understood that, in a possible implementation manner, reference signals corresponding to other QCL types may also be used as PL RS in the default mode, which is not limited in the embodiment of the present application.

Optionally, the terminal device can report to the network device whether it can support reference signals corresponding to other QCL types as the PL RS in the default mode; or the terminal device can support reference signals corresponding to other QCL types as the PL RS in the default mode In the case of PL RS in the default mode, the reference signal corresponding to other QCL types is reported to the network device, and the PL RS in the default mode is not reported to the network device if the reference signal corresponding to other QCL types is not supported as the PL RS in the default mode , The network device defaults that the terminal device supports the reference signal corresponding to the QCL type D as the PL RS in the default mode.

Exemplarily, the above-mentioned configuration of CORESET is as follows:

Exemplarily, the above-mentioned configuration of TCI-state is as follows:

3. The configuration information of the path loss estimation reference signal PL RS (that is, the above-mentioned second information). In the embodiment of the present application, the network device can configure a maximum of 64 PL RS. Optionally, the maximum configurable number of PL RSs can be limited by the parameter maxNrofPUSCH-PathlossReferenceRSs. The number of PL RS configurable by the network device should not be greater than the maximum configurable number of PL RS supported by each CC reported by the terminal device through the first capability information.

Exemplarily, the above-mentioned configuration of PL RS is as follows:

Exemplarily, each PUSCH-PathlossReferenceRS-Id can be associated with one SRI-PUSCH-PowerControlId, which can be specifically configured as follows:

4. Whether to enable the update of PL RS information through MAC-CE, for example, the value of the enablePLRSupdateForPUSCHSRS field is ON or enable, which means it is enabled; the value of the enablePLRSupdateForPUSCHSRS field is OFF or disable, or the entire field is not configured (absent) , Which means it is not turned on. In the embodiment of this application, the update of PL RS through MAC-CE is enabled.

Then, the network device sends a reference signal to the terminal device, and the terminal device can determine whether the default mode is enabled according to the above method, and further determine the reference signal to be tracked, so as to track the reference signal for path loss estimation. Specifically, if the first information indicates that the default mode is enabled, the terminal device does not track the PL RS configured through PUSCH-PathlossReferenceRS, and tracks the reference signal related to the downlink control channel for path loss estimation (If default pathloss mode was enabled, UE is not required) to track any additional pathloss RS other than default pathloss RS); if the first information indicates that the default mode is not enabled, the terminal device tracks the PL RS configured through PUSCH-PathlossReferenceRS for path loss estimation, and does not track reference signals related to the downlink control channel. Optionally, when the number of PL RSs configured by PUSCH-PathlossReferenceRS is greater than the number M of reference signals that the terminal device can track, the terminal device may determine M reference signals to be tracked according to the above method (selected according to the identification or transmission period). Exemplarily, M=4, if the number of configured PL RS is greater than 4, the terminal device only needs to track the 4 PL SRs with the smallest ID. (UE is only required to track 4pathloss RS with lowest IDs, if configured number of pathloss RSs is larger than 4.) The identifier here can be the above PUSCH-PathlossReferenceRS-Id, PUCCH-PathlossReferenceRS-Id, SRI-PUSCH-PowerControlId, SSB -At least one of Index or NZP-CSI-RS-ResourceId, which will not be repeated here.

Then, when the network device needs the terminal device to adjust the transmission power, the network device can send MAC-CE signaling to the terminal device, indicating a reference signal, and the terminal device receives the MAC-CE signaling and determines whether the reference signal belongs to the terminal. The reference signal tracked by the equipment obtains the estimated path loss and adjusts the uplink transmission power of the terminal equipment.

The method for tracking reference signals in the embodiments of the present application determines the reference signals tracked by the terminal device based on specific rules, so that the terminal device and the network device align which reference signals the terminal device tracks, which is conducive to improving the network device to adjust the uplink transmission for the terminal device. Power efficiency saves signaling overhead.

In a possible implementation of this application, taking SRS as an example, if the terminal device is configured to enable the MAC CE update path loss estimation reference signal function (ie enablePLRSupdateForPUSCHSRS), then the network device sends MAC CE to the terminal device, which is a The aperiodic or semi-persistent SRS resource set indicates SRS-PathlossReferenceRS-Id, which corresponds to a resource identifier q _{d of} a reference signal. If the SRS-PathlossReferenceRS-Id received by the terminal device is greater than 3, and the terminal device is not configured with the default mode of SRS (that is, the third default mode enableDefaultBeamPlForSRS), then the terminal device

The first time slot of 2 milliseconds after that starts to apply the MAC CE configuration, where k is the time slot for the terminal device to send the HARQ-ACK for the MAC CE, and μ is the system parameter indicator used to send the HARQ-ACK (Exemplarily,

Equivalent to the above X, equal to 3 milliseconds), T _pathloss is the time required to obtain the fifth measurement sample of the path loss estimation reference signal when the TCI state of the path loss estimation reference signal is known (T _{pathloss is} equivalent to the above T, the fifth measurement sample is just an example).

(If the UE is provided enablePLRSupdateForPUSCHSRS, a MAC CE can provide by SRS-PathlossReferenceRS-Id a corresponding RS resource index q _d for aperiodic or semi-persistent SRS resource set q _s .

If the UE receives a MAC CE activation command for one SRS-PathlossReferenceRS-Id larger than 3and the UE is not provided enableDefaultBeamPlForSRS, the UE applies the activation command in the first slot that is 2ms after slot

where k is the slot where the UE would transmit a PUCCH with HARQ-ACK information for the PDSCH providing the activation command, μis the SCS configuration for the PUCCH and T _pathloss is time for 5th measurement sample of the pathloss RS if the TCI state of the pathloss RS is known as described in[10,TS 38.133].)

Examples of PUSCH and PUCCH are similar to the above-mentioned SRS example, and will not be repeated here.

FIG. 3 shows a schematic flowchart of a method 300 for tracking a reference signal provided by an embodiment of the present application. This method can be applied to the communication system shown in FIG. 1, but the embodiment of the present application does not limit this. The method 300 includes:

S310. The network device sends first information to the terminal device, and the terminal device receives the first information correspondingly; the first information is used to configure L basic path loss estimation reference signals, where L is a positive value less than or equal to 4. Integer.

S320. The network device sends second information to the terminal device, and the terminal device receives the second information correspondingly; the second information is used to configure K additional path loss estimation reference signals, and the K additional path loss estimates The reference signal is different from the L basic path loss estimation reference signals, and K is a positive integer.

S330. The terminal device tracks the aforementioned L basic path loss estimation reference signals, and does not track the aforementioned K additional path loss estimation reference signals.

Optionally, the aforementioned L basic path loss estimation reference signals are path loss estimation reference signals configured by the network device in R15 for the terminal device, and the number is less than or equal to 4. The embodiment of this application is based on the R15 standard and adds a piece of information for configuring an additional path loss estimation reference signal (that is, the second information).

As an optional embodiment, the first information and the second information are sent by the network device through the same signaling. Exemplarily, the network device sends radio resource control (radio resource control, RRC) signaling to the terminal device, and the RRC signaling carries the foregoing first information and second information.

Exemplarily, in the above signaling, the first information may occupy a part of the field (for example, PUSCH-PathlossReferenceRS), and the second information may occupy another part of the field (for example, PUSCH-AdditionalPathlossReferenceRS). After receiving the signaling, the terminal device The first information and the second information can be identified according to the position of each field.

As an optional embodiment, the first information and the second information may be separately sent by a network device within a certain time interval. For example, the network device may send the first information to the terminal device first, and then send the second information to the terminal device. The terminal device starts a timer after receiving the first information, and detects whether the second information is received before the timer expires. Upon receiving the second information, the network device can determine the path loss estimation reference signal to be tracked according to the method of the embodiment of this application; if the terminal device does not receive the second information before the timer expires, the network device can determine based on the first information The path loss estimation reference signal to be tracked is not limited in the embodiment of the present application. For another example, the network device may first send the second information to the terminal device, and then send the first information to the terminal device, the terminal device starts a timer after receiving the second information, and detects whether the first information is received before the timer expires, If the first information is received, the network device can determine the path loss estimation reference signal to be tracked according to the method of the embodiment of the present application; if the terminal device does not receive the first information before the timer expires, the network device can be based on the second information, Determine the reference signal to be tracked.

Optionally, before S330, the above method 300 further includes S340. The network device sends a reference signal to the terminal device. The reference signal includes the foregoing L basic path loss estimation reference signals. Optionally, the reference signal may also include the foregoing reference signal. K additional path loss estimation reference signals. The terminal device can select the reference signal for tracking according to the above method, that is, measure the reference signal and maintain the path loss estimation value of the corresponding reference signal.

Optionally, the method 300 further includes:

S350: The network device sends third information to the terminal device, and correspondingly, the terminal device receives the third information; the third information is used to indicate the first reference signal;

S360: The terminal device adjusts the uplink transmission power based on the obtained path loss estimation value.

In this embodiment of the present application, the adjusted uplink transmission power takes effect after the first time period when the terminal device receives the third information. Before the adjusted uplink transmit power takes effect, the terminal device can perform one or more of the following steps:

The foregoing X may be a predefined time length, or a time length configured by a network device, or a time length reported by a terminal device, for example, it may be 3 ms, which is not limited in the embodiment of the present application.

As an optional embodiment, the above method further includes: the terminal device sends first capability information to the network device, where the first capability information is used to indicate the maximum configurable additional path loss estimation reference signal supported by each carrier component CC Number of.

In the following, the method 300 of the embodiment of the present application will be introduced in detail with reference to a specific example.

1. Configuration information of the basic path loss estimation reference signal PL RS (that is, the above-mentioned first information). In this embodiment of the present application, the network device can configure a maximum of 4 PL RS. Optionally, the maximum configurable number of basic PL RSs can be limited by the parameter maxNrofPUSCH-PathlossReferenceRSs. The number of PL RS configurable by the network device should not be greater than the maximum configurable number of PL RS supported by each CC reported by the terminal device through the first capability information.

Exemplarily, the configuration of the above-mentioned basic PL RS is as follows:

2. The configuration information of the additional path loss estimation reference signal PL RS (that is, the above-mentioned second information), for example, an information element (IE) can be added for the configuration of the additional PL RS. This additional PL RS may also be called an additional PL RS. For example, the cell name is PUSCH-AdditionalPathlossReferenceRS, and Additionalpusch-PathlossReferenceRS-Id is used as its identifier. Since the PL RS may be an SSB or a CSI-RS, which SSB or which CSI-RS is specifically may be identified by its ID or index.

In addition, maxNrofAdditionalPUSCH-PathlossReferenceRSs represents the maximum configurable number of additional PL RSs. Optionally, the sum of maxNrofAdditionalPUSCH-PathlossReferenceRSs and maxNrofPUSCH-PathlossReferenceRSs is less than or equal to the maximum configurable PLRS number of the network device. For example, if the maximum number of PL RSs that can be configured by a network device is 64, and maxNrofPUSCH-PathlossReferenceRSs is 4, then maxNrofAdditionalPUSCH-PathlossReferenceRSs is equal to 60. Taking into account the capability information reported by the terminal equipment, the number of PL RS configurable by the network equipment should not be greater than the maximum configurable PL RS supported by each CC reported by the terminal equipment and the maximum configurable additional PL supported by each CC The sum of RS numbers.

Exemplarily, the above configuration of the additional PL RS is as follows:

3. Whether to enable the update of PL RS information through MAC-CE, for example, the value of the enablePLRSupdateForPUSCHSRS field is ON or enable, which means it is enabled; the value of the enablePLRSupdateForPUSCHSRS field is OFF or disable, or the entire field is not configured (absent) , Which means it is not turned on. In the embodiment of this application, the update of PL RS through MAC-CE is enabled.

Then, the network device sends a reference signal to the terminal device, and the terminal device can determine whether the default mode is enabled according to the above method, and further determine the reference signal to be tracked, so as to track the reference signal for path loss estimation. Specifically, if the first information indicates that the default mode is enabled, the terminal device does not track the PL RS configured through PUSCH-PathlossReferenceRS, and tracks the reference signal related to the downlink control channel for path loss estimation; if the first information indicates that the default mode is not enabled, then The terminal device tracks the PL RS configured by PUSCH-PathlossReferenceRS for path loss estimation, and does not track reference signals related to the downlink control channel. Optionally, when the number of PL RSs configured by PUSCH-PathlossReferenceRS is greater than the number M of reference signals that the terminal device can track, the terminal device may determine M reference signals to be tracked according to the above method (selected according to the identification or transmission period), I won't repeat them here.

It should be understood that the method 200 and the method 300 described above are configured to distinguish multiple path loss estimation reference signals, or preset rules to select a part of the reference signals as the reference signals to be tracked. In this way, the network device and the terminal device can align which reference signals the terminal device has tracked, so as to align the behavior of the terminal device to adjust the uplink transmission power.

The embodiment of the present application also provides a method to start a timer, and the network device may prohibit sending information related to uplink power and power control for a period of time after sending the third information (for example, MAC-CE signaling), or the terminal Within a period of time after the device receives the third information, it ignores the power adjustment signaling re-sent by the network device.

Specifically, the network device may configure the timer and its time length to the terminal device through RRC signaling (or other signaling). This timer may be called a PL RS update prohibit timer, or other names, which are not limited in the embodiment of the present application. It should be understood that the network device may also send the first information, the second information, etc. in the foregoing method 200 or method 300 to the terminal device, which will not be repeated here.

Then, the network device sends a reference signal to the terminal device, and the terminal device determines the reference signal to be tracked by itself (the embodiment of the application considers that the network device does not know which reference signals the terminal device tracks), and tracks the reference signal to estimate the path loss. When the network device needs to control the terminal device to adjust the uplink transmission power, it sends the third information (same method 200 or method 300) to the terminal device through MAC-CE signaling to indicate the first reference signal. The terminal device receives the third information, starts the timer, and determines the time to adjust the uplink transmission power according to whether the first reference signal belongs to the reference signal tracked by the terminal device, that is, if the first reference signal belongs to the terminal device For the tracked reference signal, the uplink transmission power can be adjusted immediately according to the maintained path loss estimate. If the first reference signal does not belong to the reference signal tracked by the terminal device, the tracking measurement can be performed first to obtain the path loss of the first reference signal After the estimated value, adjust the uplink transmission power. It should be understood that, in the embodiment of the present application, since the network device does not know which reference signals the terminal device tracks, the behavior of the terminal device to adjust the uplink transmission power belongs to the implementation behavior of the terminal device, and the network device is agnostic.

It should be understood that the above-mentioned timer may be started by a terminal device or a network device, or both the terminal device and the network device may be started, which is not limited in the embodiment of the present application.

Optionally, the network device may start the timer at the moment when the third information is sent, or at the moment when it receives the confirmation message sent by the terminal device for the correct reception of the third information. Not limited.

Optionally, the terminal device may start the timer at the moment when the third information is received, or at the moment when the confirmation information for the correct reception of the third information is sent to the network device, this embodiment of the application does not do this. limited.

From the perspective of the network device, after the network device sends the third information, if the uplink transmission power of the terminal device meets the demand, there is no need to adjust again, and it can be considered that the third information is correctly and timely applied. If the transmission power of the terminal device does not meet the demand, due to the timer limitation, the network device will not repeatedly send power adjustment commands. Instead, it can be considered that the terminal device has not yet obtained a stable path loss estimate and is measuring the reference signal and Make adjustments. Therefore, the method in the embodiments of the present application gives the terminal device the greatest degree of freedom in implementation, avoids repeated reconfiguration of the network device, and saves signaling overhead.

Optionally, if the terminal device starts the above-mentioned timer, the start time of the timer may also be the last time the terminal device adjusts the uplink transmission power. That is to say, every time the terminal device adjusts the uplink transmission power, it maintains the uplink transmission power for a period of time to avoid adjusting too frequently.

It should be understood that the size of the sequence numbers of the foregoing processes does not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

The method for tracking a reference signal according to an embodiment of the present application is described in detail above with reference to FIGS. 1 to 3, and the device for tracking a reference signal according to an embodiment of the present application will be described in detail below in conjunction with FIG. 4 to FIG. 5.

FIG. 4 shows an apparatus 400 for tracking a reference signal provided by an embodiment of the present application. In one design, the apparatus 400 may be a terminal device or a chip in the terminal device. In another design, the device 400 may be a network device or a chip in a network device. The device 400 includes: a transceiver unit 410 and a processing unit 420.

In a possible implementation manner, the apparatus 400 is configured to execute each process and step corresponding to the terminal device in the above method 200.

The transceiver unit 410 is configured to receive first information from a network device, where the first information is used to indicate whether the default mode is enabled, and in the default mode, the device determines the to-be-tracked reference signal according to the reference signal related to the downlink control channel. Reference signal; and receiving second information from the network device, where the second information is used to configure multiple path loss estimation reference signals; the processing unit 420 is configured to: if the default mode is enabled, tracking is based on the downlink The reference signal determined by the reference signal related to the control channel does not track the multiple path loss estimation reference signals.

Optionally, the first information and the second information are sent by the network device through the same signaling.

Optionally, the processing unit 420 is further configured to: if the default mode is not enabled, track the reference signal determined based on the multiple path loss estimation reference signals, and not track the reference signal related to the downlink control channel.

Optionally, the reference signals determined based on the multiple path loss estimation reference signals are the M path loss estimation reference signals with the smallest identification among the multiple path loss estimation reference signals; or, the reference signal is based on the multiple path loss estimation reference signals. The reference signals determined by each path loss estimation reference signal are the M path loss estimation reference signals with the largest identifier among the plurality of path loss estimation reference signals; where M is a predefined value or a positive value reported by the device to the network device. Integer.

Optionally, the reference signals determined based on the multiple path loss estimation reference signals are M path loss estimation reference signals with the shortest transmission period among the multiple path loss estimation reference signals; or, the reference signal is based on the The reference signals determined by the plurality of path loss estimation reference signals are the M path loss estimation reference signals with the longest transmission period among the plurality of path loss estimation reference signals; where M is predefined or the device sends to the network device The reported positive integer.

Optionally, the transceiving unit 410 is further configured to: receive third information from the network device, where the third information is used to indicate the first reference signal; the processing unit 420 is further configured to: according to the apparatus Obtain a path loss estimate value based on the tracked reference signal and/or the first reference signal; adjust the uplink transmission power of the apparatus based on the path loss estimate, where the adjusted uplink transmission power is in the apparatus It takes effect after the first time period when the third information is received.

Optionally, if the first reference signal belongs to the reference signal tracked by the terminal device, the first time period is X; or, if all or part of the reference signal in the first reference signal is not If it belongs to the reference signal tracked by the terminal equipment, the first time period is X+T; where X is a predefined or pre-configured parameter, and T is the path loss obtained by the device by measuring the first reference signal The duration of the estimate.

Optionally, the default mode is any one of the following: a first default mode, a second default mode, or a third default mode; wherein, in the first default mode, the apparatus according to the downlink control channel related The reference signal determines the reference signal to be tracked of the physical uplink shared channel PUSCH; in the second default mode, the device determines the reference signal to be tracked of the physical uplink control channel PUCCH according to the reference signal related to the downlink control channel; In the third default mode, the apparatus determines the reference signal to be tracked of the sounding reference signal SRS according to the reference signal related to the downlink control channel.

Optionally, the transceiving unit 410 is further configured to: send first capability information and/or second capability information to the network device, where the first capability information is used to indicate the maximum configurability supported by each carrier component CC The second capability information is used to indicate the number of maximum trackable path loss estimation reference signals supported by each CC.

In another possible implementation manner, the apparatus 400 is configured to execute each process and step corresponding to the network device in the above method 200.

The transceiver unit 410 is configured to send first information to the terminal device, where the first information is used to indicate whether the default mode is enabled, and in the default mode, the terminal device determines the to-be-tracked reference signal according to the reference signal related to the downlink control channel. Reference signal; and, sending second information to the terminal device, where the second information is used to configure multiple path loss estimation reference signals; the processing unit 420 is configured to: if the default mode is enabled, determine that the terminal device tracks The reference signal of is a reference signal determined based on the reference signal related to the downlink control channel, and the reference signal that is not tracked is the multiple path loss estimation reference signals.

Optionally, the first information and the second information are sent by the apparatus through the same signaling.

Optionally, the processing unit 420 is further configured to: if the default mode is not enabled, determine that the reference signal tracked by the terminal device is a reference signal determined based on the multiple path loss estimation reference signals, and a reference signal that is not tracked The signal is a reference signal related to the downlink control channel.

Optionally, the transceiving unit 410 is further configured to: before sending the second information to the terminal device, receive first capability information from the terminal device, where the first capability information is used to indicate each carrier component The maximum configurable number of path loss estimation reference signals supported by the CC; the processing unit 420 is further configured to: determine the number of the multiple path loss estimation reference signals according to the first capability information.

Optionally, the transceiving unit 410 is further configured to: receive second capability information from the terminal device, where the second capability information is used to indicate the maximum trackable path loss estimation reference signal supported by each CC Number of.

In a possible implementation manner, the apparatus 400 is configured to execute each process and step corresponding to the terminal device in the above method 300.

The transceiver unit 410 is configured to: receive first information from a network device, where the first information is used to configure L basic path loss estimation reference signals, where L is a positive integer less than or equal to 4; and, receive from the network The second information of the device, the second information is used to configure K additional path loss estimation reference signals, the K additional path loss estimation reference signals are different from the L basic path loss estimation reference signals, K Is a positive integer; the processing unit 420 is configured to track the L basic path loss estimation reference signals, and not track the K additional path loss estimation reference signals.

Optionally, if the first reference signals all belong to the L basic path loss estimation reference signals, the first time period is X; or, if all or part of the reference signals in the first reference signal If the signal does not belong to the L basic path loss estimation reference signals, the first time period is X+T; where X is a predefined or pre-configured parameter, and T is the first reference signal measured by the device The length of time for the signal to obtain the estimated path loss value.

Optionally, the transceiver unit 410 is further configured to send first capability information to the network device, where the first capability information is used to indicate the maximum configurable additional path loss estimation reference supported by each carrier component CC The number of signals.

In another possible implementation manner, the apparatus 400 is configured to execute each process and step corresponding to the network device in the above method 300.

The transceiver unit 410 is configured to: send first information to the terminal device, where the first information is used to configure L basic path loss estimation reference signals, where L is a positive integer less than or equal to 4; and, send to the terminal device The second information, the second information is used to configure K additional path loss estimation reference signals, the K additional path loss estimation reference signals are different from the L basic path loss estimation reference signals, and K is positive Integer; the processing unit 420 is configured to determine that the reference signals tracked by the terminal device are the L basic path loss estimation reference signals, and the untracked reference signals are the K additional path loss estimation reference signals.

Optionally, the transceiving unit 410 is further configured to: before sending the second information to the terminal device, receive first capability information sent by the terminal device, where the first capability information is used to indicate each carrier component The maximum configurable number of additional path loss estimation reference signals supported by the CC; the processing unit 420 is further configured to: determine the number of the K additional path loss estimation reference signals according to the first capability information.

It should be understood that the device 400 here is embodied in the form of a functional unit. The term "unit" here can refer to application specific integrated circuits (ASICs), electronic circuits, processors used to execute one or more software or firmware programs (such as shared processors, proprietary processors, or groups). Processor, etc.) and memory, merged logic circuits, and/or other suitable components that support the described functions. In an optional example, those skilled in the art can understand that the apparatus 400 may be specifically a terminal device or a network device in the foregoing embodiment, and the apparatus 400 may be used to execute each of the terminal devices or network devices in the foregoing method embodiment. To avoid repetition, the process and/or steps will not be repeated here.

The apparatus 400 of each of the foregoing solutions has the function of implementing the corresponding steps performed by the terminal device or the network device in the foregoing method; the function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions. For example, the above-mentioned transceiver unit 410 may include a sending unit and a receiving unit. The sending unit may be used to implement various steps and/or procedures for performing the sending action corresponding to the above-mentioned transceiver unit, and the receiving unit may be used to implement the above-mentioned transceiver unit. The various steps and/or processes used to perform the receiving action. The sending unit can be replaced by a transmitter, and the receiving unit can be replaced by a receiver, respectively performing the receiving and sending operations and related processing operations in each method embodiment.

In the embodiment of the present application, the device 400 in FIG. 4 may also be a chip or a chip system, such as a system on chip (system on chip, SoC). Correspondingly, the transceiver unit 410 may be the transceiver circuit of the chip, which is not limited here.

FIG. 5 shows another device 500 for tracking a reference signal provided by an embodiment of the present application. The device 500 includes a processor 510, a transceiver 520, and a memory 530. The processor 510, the transceiver 520, and the memory 530 communicate with each other through an internal connection path. The memory 530 is used to store instructions, and the processor 510 is used to execute the instructions stored in the memory 530 to control the transceiver 520 to send signals and / Or receive the signal.

In a possible implementation manner, the apparatus 500 is configured to execute each process and step corresponding to the terminal device in the above method 200.

Wherein, the processor 510 is configured to: receive first information from the network device through the transceiver 520, the first information is used to indicate whether the default mode is enabled, and in the default mode, the device is related to the downlink control channel. The reference signal to determine the reference signal to be tracked; and receiving second information from the network device, where the second information is used to configure multiple path loss estimation reference signals; if the default mode is enabled, tracking is based on the The reference signal determined by the reference signal related to the downlink control channel does not track the multiple path loss estimation reference signals.

In another possible implementation manner, the apparatus 500 is configured to execute each process and step corresponding to the network device in the above method 200.

Wherein, the processor 510 is configured to send first information to the terminal device through the transceiver 520, and the first information is used to indicate whether the default mode is enabled. In the default mode, the terminal device is related to the downlink control channel. Determine the reference signal to be tracked by the reference signal; and send second information to the terminal device, where the second information is used to configure multiple path loss estimation reference signals; if the default mode is enabled, determine the terminal device The tracked reference signal is a reference signal determined based on the reference signal related to the downlink control channel, and the untracked reference signal is the multiple path loss estimation reference signals.

In a possible implementation manner, the apparatus 500 is configured to execute each process and step corresponding to the terminal device in the above method 300.

Wherein, the processor 510 is configured to receive first information from a network device through the transceiver 520, the first information is used to configure L basic path loss estimation reference signals, and L is a positive integer less than or equal to 4; And, receiving second information from the network device, the second information being used to configure K additional path loss estimation reference signals, the K additional path loss estimation reference signals and the L basic path The loss estimation reference signals are different, and K is a positive integer; the L basic path loss estimation reference signals are tracked, and the K additional path loss estimation reference signals are not tracked.

In another possible implementation manner, the apparatus 500 is configured to execute each process and step corresponding to the network device in the above method 300.

Wherein, the processor 510 is configured to: send first information to the terminal device through the transceiver 520, where the first information is used to configure L basic path loss estimation reference signals, where L is a positive integer less than or equal to 4; and , Sending second information to the terminal device, where the second information is used to configure K additional path loss estimation reference signals, the K additional path loss estimation reference signals and the L basic path loss estimates The reference signals are different, and K is a positive integer; it is determined that the reference signals tracked by the terminal device are the L basic path loss estimation reference signals, and the untracked reference signals are the K additional path loss estimation reference signals.

It should be understood that the apparatus 500 may be specifically a terminal device or a network device in the foregoing embodiment, and may be used to execute various steps and/or processes corresponding to the terminal device or the network device in the foregoing method embodiment. Optionally, the memory 530 may include a read-only memory and a random access memory, and provide instructions and data to the processor. A part of the memory may also include a non-volatile random access memory. For example, the memory can also store device type information. The processor 510 may be used to execute instructions stored in the memory, and when the processor 510 executes the instructions stored in the memory, the processor 510 is configured to execute each of the foregoing method embodiments corresponding to the terminal device or the network device. Steps and/or processes. The transceiver 520 may include a transmitter and a receiver, and the transmitter may be used to implement various steps and/or processes for performing the sending action corresponding to the above transceiver, and the receiver may be used to implement the corresponding use of the above transceiver. To perform the various steps and/or processes of the receiving action.

It should be understood that, in the embodiments of the present application, the processor of the above-mentioned device may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSP), or application-specific integrated circuits. (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor or instructions in the form of software. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software units in the processor. The software unit may be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor executes the instructions in the memory and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.

A person of ordinary skill in the art may realize that, in combination with the method steps and units described in the embodiments disclosed herein, they can be implemented by electronic hardware, computer software, or a combination of both, in order to clearly illustrate the possibilities of hardware and software. Interchangeability, in the above description, the steps and components of the embodiments have been generally described in accordance with their functions. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. A person of ordinary skill in the art may use different methods for each specific application to implement the described functions, but such implementation should not be considered as going beyond the scope of the present application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit may refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments of the present application.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be realized in the form of hardware or software functional unit.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application is essentially or the part that contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium. It includes several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disks or optical disks and other media that can store program codes. .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of various equivalents within the technical scope disclosed in this application. Modifications or replacements, these modifications or replacements shall be covered within the protection scope of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims

A method for tracking a reference signal, characterized in that it comprises:

The terminal device receives first information from the network device, where the first information is used to indicate whether the default mode is enabled, and in the default mode, the terminal device determines the reference signal to be tracked according to the reference signal related to the downlink control channel;

The terminal device receives second information from the network device, where the second information is used to configure multiple path loss estimation reference signals;

If the default mode is enabled, the terminal device tracks the reference signal determined based on the reference signal related to the downlink control channel, and does not track the multiple path loss estimation reference signals.
The method according to claim 1, wherein the first information and the second information are sent by the network device through the same signaling.
The method according to claim 1 or 2, wherein the method further comprises:

If the default mode is not enabled, the terminal device tracks the reference signal determined based on the multiple path loss estimation reference signals, and does not track the reference signal related to the downlink control channel.
The method according to claim 3, wherein the reference signals determined based on the plurality of path loss estimation reference signals are M path loss estimation reference signals with the smallest identification among the plurality of path loss estimation reference signals ;or,

The reference signals determined based on the plurality of path loss estimation reference signals are M path loss estimation reference signals with the largest identification among the plurality of path loss estimation reference signals;

Wherein, M is a predefined or positive integer reported by the terminal device to the network device.
The method according to claim 3, wherein the reference signals determined based on the multiple path loss estimation reference signals are M path loss estimation reference signals with the shortest transmission period among the multiple path loss estimation reference signals Signal; or,

The reference signals determined based on the multiple path loss estimation reference signals are M path loss estimation reference signals with the longest transmission period among the multiple path loss estimation reference signals;

Wherein, M is a predefined or positive integer reported by the terminal device to the network device.
The method according to any one of claims 1 to 5, wherein the method further comprises:

The terminal device receives third information from the network device, where the third information is used to indicate a first reference signal;

Obtaining, by the terminal device, a path loss estimate value according to the reference signal tracked by the terminal device and/or the first reference signal;

The terminal device adjusts the uplink transmission power of the terminal device based on the path loss estimation value, where the adjusted uplink transmission power takes effect after the first time period when the terminal device receives the third information.
The method according to claim 6, wherein if the first reference signal all belong to the reference signal tracked by the terminal device, the first time period is X; or,

If all or part of the reference signal in the first reference signal does not belong to the reference signal tracked by the terminal device, the first time period is X+T;

Where X is a predefined or pre-configured parameter, and T is a time length for the terminal device to measure the first reference signal to obtain the path loss estimate value.
The method according to any one of claims 1 to 7, wherein the default mode is any one of the following:

The first default mode, the second default mode, or the third default mode;

Wherein, in the first default mode, the terminal device determines the reference signal to be tracked of the physical uplink shared channel PUSCH according to the reference signal related to the downlink control channel; in the second default mode, the terminal device determines the reference signal to be tracked for the physical uplink shared channel PUSCH according to The reference signal related to the downlink control channel determines the reference signal to be tracked of the physical uplink control channel PUCCH; in the third default mode, the terminal device determines the sounding reference signal SRS to be tracked according to the reference signal related to the downlink control channel Reference signal.
The method according to any one of claims 1 to 8, wherein the method further comprises:

Sending, by the terminal device, first capability information and/or second capability information to the network device, where the first capability information is used to indicate the number of maximum configurable path loss estimation reference signals supported by each carrier component CC, The second capability information is used to indicate the number of maximum trackable path loss estimation reference signals supported by each CC.
A method for tracking a reference signal, characterized in that it comprises:

The network device sends first information to the terminal device, where the first information is used to indicate whether the default mode is enabled, and in the default mode, the terminal device determines the reference signal to be tracked according to the reference signal related to the downlink control channel;

Sending, by the network device, second information to the terminal device, where the second information is used to configure multiple path loss estimation reference signals;

If the default mode is enabled, the network device determines that the reference signal tracked by the terminal device is a reference signal determined based on the reference signal related to the downlink control channel, and the reference signal that is not tracked is the multiple path loss estimation references Signal.
The method according to claim 10, wherein the first information and the second information are sent by the network device through the same signaling.
The method according to claim 10 or 11, wherein the method further comprises:

If the default mode is not enabled, the network device determines that the reference signal tracked by the terminal device is a reference signal determined based on the multiple path loss estimation reference signals, and the reference signal that is not tracked is related to the downlink control channel Reference signal.
The method according to any one of claims 10 to 12, wherein before the network device sends the second information to the terminal device, the method further comprises:

The network device receives first capability information from the terminal device, where the first capability information is used to indicate the number of maximum configurable path loss estimation reference signals supported by each carrier component CC;

The network device determines the number of the multiple path loss estimation reference signals according to the first capability information.
The method according to any one of claims 10 to 13, wherein the method further comprises:

The network device receives second capability information from the terminal device, where the second capability information is used to indicate the number of maximum trackable path loss estimation reference signals supported by each CC.
A method for tracking a reference signal, characterized in that it comprises:

The terminal device receives first information from the network device, where the first information is used to configure L basic path loss estimation reference signals, where L is a positive integer less than or equal to 4;

The terminal device receives second information from the network device, the second information is used to configure K additional path loss estimation reference signals, the K additional path loss estimation reference signals and the L base The path loss estimation reference signal is different, and K is a positive integer;

The terminal device tracks the L basic path loss estimation reference signals, and does not track the K additional path loss estimation reference signals.
The method according to claim 15, wherein the first information and the second information are sent by the network device through the same signaling.
The method according to claim 15 or 16, wherein the method further comprises:

The terminal device receives third information from the network device, where the third information is used to indicate a first reference signal;

Obtaining, by the terminal device, a path loss estimate value according to the reference signal tracked by the terminal device and/or the first reference signal;

The terminal device adjusts the uplink transmission power of the terminal device based on the path loss estimation value, where the adjusted uplink transmission power takes effect after the first time period when the terminal device receives the third information.
The method according to claim 17, wherein if the first reference signals all belong to the L basic path loss estimation reference signals, the first time period is X; or,

If all or part of the reference signals in the first reference signal do not belong to the L basic path loss estimation reference signals, the first time period is X+T;

Where X is a predefined or pre-configured parameter, and T is a time length for the terminal device to measure the first reference signal to obtain the path loss estimate value.
The method according to any one of claims 15 to 18, wherein the method further comprises:

The terminal device sends first capability information to the network device, where the first capability information is used to indicate the maximum configurable number of additional path loss estimation reference signals supported by each carrier component CC.
A method for tracking a reference signal, characterized in that it comprises:

The network device sends first information to the terminal device, where the first information is used to configure L basic path loss estimation reference signals, where L is a positive integer less than or equal to 4;

The network device sends second information to the terminal device, where the second information is used to configure K additional path loss estimation reference signals, the K additional path loss estimation reference signals and the L basic The path loss estimation reference signal is different, and K is a positive integer;

The network device determines that the reference signals tracked by the terminal device are the L basic path loss estimation reference signals, and the untracked reference signals are the K additional path loss estimation reference signals.
The method according to claim 20, wherein the first information and the second information are sent by the network device through the same signaling.
The method according to claim 20 or 21, wherein before the network device sends the second information to the terminal device, the method further comprises:

Receiving, by the network device, first capability information sent by the terminal device, where the first capability information is used to indicate the maximum configurable number of additional path loss estimation reference signals supported by each carrier component CC;

The network device determines the number of the K additional path loss estimation reference signals according to the first capability information.
A device for tracking a reference signal, characterized in that it comprises:

The transceiver unit is configured to receive first information from a network device, where the first information is used to indicate whether the default mode is enabled, and in the default mode, the device determines the reference to be tracked according to the reference signal related to the downlink control channel Signal; and, receiving second information from the network device, where the second information is used to configure multiple path loss estimation reference signals;

The processing unit is configured to, if the default mode is enabled, track the reference signal determined based on the reference signal related to the downlink control channel, and not track the multiple path loss estimation reference signals.
The apparatus according to claim 23, wherein the first information and the second information are sent by the network device through the same signaling.
The device according to claim 23 or 24, wherein the processing unit is further configured to:

If the default mode is not enabled, the reference signal determined based on the multiple path loss estimation reference signals is tracked, and the reference signal related to the downlink control channel is not tracked.
The apparatus according to claim 25, wherein the reference signals determined based on the plurality of path loss estimation reference signals are M path loss estimation reference signals with the smallest identification among the plurality of path loss estimation reference signals ;or,

The reference signals determined based on the plurality of path loss estimation reference signals are M path loss estimation reference signals with the largest identification among the plurality of path loss estimation reference signals;

Wherein, M is a pre-defined or positive integer reported by the device to the network device.
The apparatus according to claim 25, wherein the reference signals determined based on the plurality of path loss estimation reference signals are M path loss estimation reference signals with the shortest transmission period among the plurality of path loss estimation reference signals Signal; or,

The reference signals determined based on the multiple path loss estimation reference signals are M path loss estimation reference signals with the longest transmission period among the multiple path loss estimation reference signals;

Wherein, M is a pre-defined or positive integer reported by the device to the network device.
The device according to any one of claims 23 to 27, wherein the transceiver unit is further configured to:

Receiving third information from the network device, where the third information is used to indicate a first reference signal;

The processing unit is also used for:

Obtaining a path loss estimate value according to the reference signal tracked by the device and/or the first reference signal;

Adjust the uplink transmission power of the device based on the path loss estimation value, where the adjusted uplink transmission power takes effect after the first time period when the device receives the third information.
The apparatus according to claim 28, wherein if the first reference signal belongs to the reference signal tracked by the terminal device, the first time period is X; or,

If all or part of the reference signal in the first reference signal does not belong to the reference signal tracked by the terminal device, the first time period is X+T;

Wherein, X is a predefined or pre-configured parameter, and T is the length of time that the device measures the first reference signal to obtain the path loss estimate value.
The device according to any one of claims 23 to 29, wherein the default mode is any one of the following:

The first default mode, the second default mode, or the third default mode;

Wherein, in the first default mode, the device determines the reference signal to be tracked of the physical uplink shared channel PUSCH according to the reference signal related to the downlink control channel; in the second default mode, the device determines the reference signal to be tracked according to the downlink control channel The channel-related reference signal determines the reference signal to be tracked of the physical uplink control channel PUCCH; in the third default mode, the device determines the reference signal to be tracked of the sounding reference signal SRS according to the reference signal related to the downlink control channel.
The device according to any one of claims 23 to 30, wherein the transceiver unit is further configured to:

Send first capability information and/or second capability information to the network device, where the first capability information is used to indicate the number of maximum configurable path loss estimation reference signals supported by each carrier component CC, and the second The capability information is used to indicate the number of maximum trackable path loss estimation reference signals supported by each CC.
A device for tracking a reference signal, characterized in that it comprises:

The transceiver unit is configured to send first information to the terminal device, where the first information is used to indicate whether the default mode is enabled, and in the default mode, the terminal device determines the reference to be tracked according to the reference signal related to the downlink control channel Signal; and, sending second information to the terminal device, where the second information is used to configure multiple path loss estimation reference signals;

A processing unit, configured to determine that the reference signal tracked by the terminal device is a reference signal determined based on the reference signal related to the downlink control channel if the default mode is turned on, and the reference signal that is not tracked is the multiple path loss estimates Reference signal.
The device according to claim 32, wherein the first information and the second information are sent by the device through the same signaling.
The device according to claim 32 or 33, wherein the processing unit is further configured to:

If the default mode is not enabled, it is determined that the reference signal tracked by the terminal device is a reference signal determined based on the multiple path loss estimation reference signals, and the reference signal that is not tracked is a reference signal related to the downlink control channel.
The device according to any one of claims 32 to 34, wherein the transceiver unit is further configured to:

Before sending the second information to the terminal device, receive first capability information from the terminal device, where the first capability information is used to indicate the maximum configurable path loss estimation reference signal supported by each carrier component CC number;

The processing unit is also used for:

Determine the number of the multiple path loss estimation reference signals according to the first capability information.
The device according to any one of claims 32 to 35, wherein the transceiver unit is further configured to:

Receiving second capability information from the terminal device, where the second capability information is used to indicate the number of maximum trackable path loss estimation reference signals supported by each CC.
A device for tracking a reference signal, characterized in that it comprises:

The transceiver unit is configured to receive first information from a network device, where the first information is used to configure L basic path loss estimation reference signals, where L is a positive integer less than or equal to 4; and, receiving from the network device The second information is used to configure K additional path loss estimation reference signals, the K additional path loss estimation reference signals are different from the L basic path loss estimation reference signals, and K is Positive integer

The processing unit is configured to track the L basic path loss estimation reference signals, and not track the K additional path loss estimation reference signals.
The apparatus according to claim 37, wherein the first information and the second information are sent by the network device through the same signaling.
The device according to claim 37 or 38, wherein the transceiver unit is further configured to:

Receiving third information from the network device, where the third information is used to indicate a first reference signal;

The processing unit is also used for:

Obtaining a path loss estimate value according to the reference signal tracked by the device and/or the first reference signal;

Adjust the uplink transmission power of the device based on the path loss estimation value, where the adjusted uplink transmission power takes effect after the first time period when the device receives the third information.
The apparatus according to claim 39, wherein if the first reference signals all belong to the L basic path loss estimation reference signals, the first time period is X; or,

If all or part of the reference signals in the first reference signal do not belong to the L basic path loss estimation reference signals, the first time period is X+T;

Wherein, X is a predefined or pre-configured parameter, and T is the length of time that the device measures the first reference signal to obtain the path loss estimate value.
The device according to any one of claims 37 to 40, wherein the transceiver unit is further configured to:

The first capability information is sent to the network device, where the first capability information is used to indicate the maximum configurable number of additional path loss estimation reference signals supported by each carrier component CC.
A device for tracking a reference signal, characterized in that it comprises:

The transceiver unit is configured to send first information to the terminal device, where the first information is used to configure L basic path loss estimation reference signals, where L is a positive integer less than or equal to 4; and, send the first information to the terminal device Second information, the second information is used to configure K additional path loss estimation reference signals, the K additional path loss estimation reference signals are different from the L basic path loss estimation reference signals, and K is a positive integer ；

The processing unit is configured to determine that the reference signals tracked by the terminal device are the L basic path loss estimation reference signals, and the untracked reference signals are the K additional path loss estimation reference signals.
The device according to claim 42, wherein the first information and the second information are sent by the device through the same signaling.
The device according to claim 42 or 43, wherein the transceiver unit is further configured to:

Before sending the second information to the terminal device, receive the first capability information sent by the terminal device, where the first capability information is used to indicate the maximum configurable additional path loss estimation reference supported by each carrier component CC The number of signals;

The processing unit is also used for:

According to the first capability information, the number of the K additional path loss estimation reference signals is determined.
A device for tracking reference signals, which is characterized by comprising: a processor, a memory, and a transceiver;

The transceiver is used to receive signals or send signals;

The memory is used to store program code;

The processor is configured to call the program code from the memory to execute any one of claims 1 to 9, any one of claims 10 to 14, any one of claims 15 to 19, or as The method of any one of claims 20-22.
A device for tracking a reference signal, comprising: a processor, when the processor calls a computer program in the memory, as in any one of claims 1 to 9 and any one of claims 10 to 14 , The method according to any one of claims 15 to 19 or any one of claims 20 to 22 is executed.
A device for tracking reference signals, comprising: a memory and a processor; the memory is used to store a computer program, and when the processor calls the computer program in the memory, the device executes Any one of claims 1-9, any one of claims 10-14, any one of claims 15-19, or a method according to any one of claims 20-22.
A computer readable medium for storing a computer program, wherein the computer program includes a computer program for implementing any one of claims 1 to 9, any one of claims 10 to 14, and claims 15 to Any one of 19, or an instruction of the communication method according to any one of claims 20-22.
A computer program product, the computer program product includes computer program code, characterized in that, when the computer program code runs on a computer, the computer realizes any one of claims 1 to 9 and claim 10. The method according to any one of claims 15 to 19, or any one of claims 20 to 22.