CN111954249A - Path loss determination method, node and storage medium - Google Patents

Path loss determination method, node and storage medium Download PDF

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Publication number
CN111954249A
CN111954249A CN202010803698.6A CN202010803698A CN111954249A CN 111954249 A CN111954249 A CN 111954249A CN 202010803698 A CN202010803698 A CN 202010803698A CN 111954249 A CN111954249 A CN 111954249A
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power control
path loss
reference signal
parameter
determining
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姚珂
高波
鲁照华
蒋创新
张淑娟
闫文俊
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ZTE Corp
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ZTE Corp
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Priority to CN202010803698.6A priority Critical patent/CN111954249A/en
Publication of CN111954249A publication Critical patent/CN111954249A/en
Priority to PCT/CN2021/108805 priority patent/WO2022033301A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic

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Abstract

The invention discloses a path loss method, a node and a storage medium, wherein the method comprises the steps that a first communication node acquires command information, determines the beam state of uplink transmission according to the command information, and can determine the path loss of the uplink transmission in a preset mode under the condition that a reference signal PL-RS which is associated with the beam state and used for path loss measurement is not maintained for the path loss PL measurement.

Description

Path loss determination method, node and storage medium
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a path loss determination method, a node, and a storage medium.
Background
One of the key features of the New air interface technology (NR) of the fifth generation mobile communication system is to support a high frequency band, which has abundant frequency domain resources, but has the problem of small coverage due to fast attenuation of wireless signals. The beam mode transmitting signals can focus energy in a smaller space range, and the coverage problem of high-frequency band signals is improved. In a beam scenario, as time and location change, a beam pair between a base station and a User Equipment (UE) may also change, and thus a flexible beam update mechanism is required. The power control parameters of uplink transmission after the beam update also need to be changed, such as a reference signal for measuring path loss, closed-loop power control parameters, and the like. The related art can support the basic beam mechanism at present, but has the problem that the power control parameter information related to the beam is ambiguous in the aspect of indicating multiple channel beams.
Disclosure of Invention
A primary objective of an embodiment of the present invention is to provide a method, a node, and a storage medium for determining a path loss, where a first communication node receives command information indicating a beam state for uplink transmission, and determines a path loss for uplink transmission in a preset manner when an RS for PL measurement associated with the beam state is in an unremained state.
In order to achieve the above object, an embodiment of the present invention provides a path loss determining method applied to a first communication node, where the method includes:
acquiring command information;
determining the beam state of uplink transmission according to the command information;
and under the condition that the reference signal PL-RS used for path loss measurement and associated with the beam state is not maintained for PL measurement, determining the path loss of uplink transmission according to a preset mode.
In order to achieve the above object, an embodiment of the present invention provides a closed-loop power control determining method, applied to a first communication node, where the method includes:
and resetting the closed-loop power control adjustment amount corresponding to the closed-loop power control parameter in the incidence relation between the reference signal and the power control parameter when the incidence relation between the reference signal and the power control parameter is provided or the power control parameter in the incidence relation between the reference signal and the power control parameter is changed.
In order to achieve the above object, an embodiment of the present invention provides a power control margin determining method, which is applied to a first communication node, and the method includes the following steps:
determining a closed-loop Power Control adjustment amount of the virtual transmission according to at least one of a start time of the virtual transmission and an accumulation interval of a Transmit Power Control (TPC) command of the virtual transmission;
and determining the power margin of the virtual transmission according to the closed-loop power control adjustment quantity of the virtual transmission.
To achieve the above object, an embodiment of the present invention provides a path loss determining apparatus, including:
the acquisition module is used for acquiring command information;
the determining module is used for determining the beam state of uplink transmission according to the command information;
and the determining module is used for determining the path loss of uplink transmission according to a preset mode under the condition that the reference signal PL-RS which is associated with the beam state and used for path loss measurement is not maintained for path loss PL measurement.
To achieve the above object, an embodiment of the present invention provides a closed-loop power control determining apparatus, including:
and a resetting module, configured to reset a closed-loop power control adjustment amount corresponding to a closed-loop power control parameter in an association between a reference signal and a power control parameter when the association between the reference signal and the power control parameter is provided, or when the power control parameter in the association between the reference signal and the power control parameter is changed.
To achieve the above object, an embodiment of the present invention provides a power headroom determining apparatus, including:
a determining module, configured to determine a closed-loop power control adjustment amount of virtual transmission according to at least one of a start time of the virtual transmission and an accumulation interval of a TPC command of the virtual transmission;
and the determining module is further configured to determine a power headroom of the virtual transmission according to the closed-loop power control adjustment amount of the virtual transmission.
To achieve the above object, an embodiment of the present invention provides a node, including: the present invention relates to a power control apparatus and a method for determining a power control margin, and more particularly to a power control apparatus and a method for determining a path loss in a power control system, which are capable of determining a power control margin, and a power control method for a power control system.
To achieve the above object, an embodiment of the present invention provides a readable and writable storage medium, where the storage medium is used for computer storage, and the storage medium may store one or more programs, where the one or more programs may be executed by one or more processors to implement the above path loss method, the above closed-loop power control determination method, or the above power control margin determination method.
The embodiment of the application provides a path loss method, a node and a storage medium, wherein the method comprises the steps that a first communication node acquires command information, determines the beam state of uplink transmission according to the command information, and can determine the path loss of the uplink transmission in a preset mode under the condition that a reference signal PL-RS which is associated with the beam state and used for path loss measurement is not maintained for the path loss PL measurement.
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Fig. 1 is a flowchart of a path loss method according to an embodiment of the present invention.
Fig. 2 is a flowchart of closed-loop power control determination according to an embodiment of the present invention.
Fig. 3 is a flowchart of a power control margin determination method according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a TPC command accumulation interval of closed-loop power control adjustment amounts for dynamically scheduled PUSCH and virtual PUSCH transmission according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a path loss determining apparatus according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a closed-loop power control determining apparatus according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a power headroom determining apparatus according to an embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a first communication node according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
In addition, in the embodiments of the present application, the words "optionally" or "exemplarily" are used for indicating as examples, illustrations or explanations. Any embodiment or design described herein as "optionally" or "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the words "optionally" or "exemplarily" etc. is intended to present the relevant concepts in a concrete fashion.
The existing NR supporting multi-beam scheme is to indicate uplink and downlink separately, and data and service are also independent indication beams. Specifically, the downlink beam is indicated only by the TCI state, and the Uplink beam indication mode defines respective spatial relationships (spatial relationships) for a Channel Sounding Reference Signal (SRS) resource and a Physical Uplink Control Channel (PUCCH) resource, where the spatial relationships refer to an existing Uplink Reference Signal (UL RS) or downlink Reference Signal (DL RS), and the PUSCH indicates to refer to an existing SRS resource.
The multi-beam technology evolution includes both the united TCI architecture and Common beam directions. In the Unified TCI architecture, both uplink and downlink transmissions use Transmission Configuration Indication (TCI state) Indication beams. In Common beam, the data channel and the control channel use identical beams. For example, the new beam indicated by the Downlink Control Information (DCI) is used for other multiple channels, such as a Physical Downlink Shared Channel (PDSCH), a Physical Downlink Control Channel (PDCCH), a PUCCH, and a Physical Uplink Shared Channel (PUSCH).
Only downlink transmission is considered in the TCI state indicated by the DCI as the PDSCH, and the conventional standard does not explicitly specify the TCI state indicated by the DCI for scheduling downlink transmission to be used for uplink transmission and the relevant content of the state of the associated Path Loss Reference Signal (PL-RS).
In order to facilitate understanding of the solutions provided in the embodiments of the present application, the following explains related concepts related to the solutions of the present application, and the following specifically shows:
the Path Loss (PL) value is the result of higher layer filtering and requires a longer time to monitor the Reference Signal (RS) that measures PL. PL in the LTE system is mainly measured by a Cell Reference Signal (CRS), does not require network side configuration, and depends on implementation of User Equipment (UE). In the NR system, since there is no CRS, but there are various configurations of downlink RSs (e.g., Channel State Information-Reference Signals (CSI-RS), Synchronization Signals, and PBCH blocks (SSBs)) that can be used to measure PL, the UE needs to indicate on the network side based on which RS resources measure PL. Considering complexity, currently only UEs are supported to monitor a maximum of 4 RSs for PL measurement in one serving cell at the same time. It should be noted that, the network side may configure more than 4 RSs for measuring PL for the UE, but the number of RSs for measuring PL that the UE needs to monitor or activate simultaneously cannot be greater than 4, where the monitored or activated RSs for measuring PL may also be referred to as RSs for maintaining PL measurement.
In the related art, a PL-RS standard configured by Radio Resource Control (RRC) does not specify an explicit validation time, and a Media Access Control Element (MAC CE) updates a PL-RS which can be used after a certain validation time elapses, where the PL-RS is an RS used for PL measurement.
The base station enables the UE to determine beam resources of PUSCH transmission and parameters related to Multiple-Input Multiple-Output (MIMO) through the SRS resources which are used for indicating reference for the PUSCH transmission. Namely, the UE transmits a plurality of SRS resources, and the base station selects one or more SRS resources to indicate to the UE for reference of PUSCH transmission after evaluation. The UE transmits the PUSCH transmission using the same parameters as the SRS resource, such as the transmit spatial filter. The SRS resource used as a reference for PUSCH transmission is from an SRS resource set, one or more SRS resources may be referred to for PUSCH transmission, and SRI (SRS resource Indicator) is used for indicating the SRS resource, where a value range of SRI depends on the number of SRS resources in the SRS resource set and a transmission mode of PUSCH.
For the PUSCH transmission based on the Codebook, the number of SRS resources in the SRS resource set with the corresponding usage of "Codebook" is at most 2, and the SRI indicates one SRS resource in the SRS resource set, and there are at most 2 or 4 values. For the PUSCH transmission of a non-codebook, the number of SRS resources in an SRS resource set with the corresponding use of 'non codebook' is at most 4, and the SRI indicates any combination of the SRS resources in the SRS resource set and has at most 15 values.
In order to support a multi-beam scene, the base station configures power control parameters of the PUSCH for the UE through RRC, wherein the power control parameters comprise open-loop power control parameters (target received power P) of the PUSCHO_UEAnd path loss compensation factor alpha), a PUSCH PL-RS pool, and a closed loop power control number (pool) of the PUSCH. The number of closed-loop power controls can also be understood as a pool of closed-loop power control parameters. For example, if the number of closed-loop power controls is 2, the closed-loop power control parameter pool includes two closed-loop power control numbers, which respectively represent different closed-loop power controls.
In the embodiment of the present application, the base station may also be a NodeB, a gNB, an access point AP, or a network side.
In the embodiments of the present application, the referred parameter pool may be understood as a set including at least one parameter. For example, the pool of PL-RS parameters includes at least one PL-RS parameter, each PL-RS parameter identified by a PL-RS parameter number.
The base station may also configure associations with the above 3 power control parameters for each possible SRI value of the PUSCH. In the association relationship between the SRI and the power control parameter, the SRI does not directly appear, but corresponds to the association number SRI-PUSCH-powercontrol id of the SRI and the power control parameter one by one, and the association relationship between the SRI value and the PL-RS can be updated by the MAC CE.
And the UE searches the association relation between the SRI and the power control parameter through the SRI referred by the PUSCH transmission to obtain the power control parameter of the PUSCH.
The power control parameters of the PUCCH may include a spatial relationship set, a PUCCH resource set, and a power control parameter associated with each PUCCH spatial relationship configured by the RRC for the UE, the MAC CE activates the PUCCH resource and configures the associated PUCCH spatial relationship for the PUCCH resource, the DCI indicates the PUCCH resource from the PUCCH resource activated by the MAC CE, and the UE obtains the PUCCH spatial relationship associated with the PUCCH resource from the DCI to determine the power control parameter for PUCCH transmission.
For PUCCH transmission, the base station may configure for the UE: PUCCH power control parameter pool, PUCCH spatial relationship pool. Wherein, the PUCCH power control parameter pool comprises: a pool of open-loop power control parameters (target received power P0) of the PUCCH, a pool of PL-RS of the PUCCH, and a number (pool) of closed-loop power control of the PUCCH. In addition, the base station may also configure the association between the spatial relationship and the power control parameter, that is, configure the associated power control parameter for each spatial relationship, and the power control parameter may be indicated by the number of each power control parameter in the PUCCH power control parameter pool.
And the base station activates one or more PUCCH resources through the MAC CE, and associates the spatial relationship of one PUCCH in the RRC-configured PUCCH spatial relationship pool for each activated PUCCH resource. And the UE sends HARQ-ACK to the base station after receiving the MAC CE for activating the PUCCH resources, and the MAC CE activates the PUCCH resources to take effect after 3 subframes later.
One PUCCH resource is indicated in the DCI, and the UE can obtain the power control parameter of the corresponding PUCCH according to the spatial relation of the associated PUCCH.
The configuration number of PL-RS in the new specification is expanded to 64, but the number of PL-RS related to PUCCH resources activated by MAC CE cannot be larger than 4. Further, the number of PL-RSs associated with the activated PUCCH resource and the total number of activated PL-RSs of PUSCH and SRS cannot exceed 4.
Based on the above concept, fig. 1 is a flowchart of a path loss method provided in an embodiment of the present application, and the method may be applied to a first communication node, for example, a UE, a terminal, and the like in a communication system. As shown in fig. 1, the method may include the steps of:
and S101, acquiring command information.
Illustratively, the command information may be information transmitted by the base station
Optionally, the command information may include at least one of: DCI, MAC CE, higher layer signaling (e.g., RRC signaling).
And S102, determining the beam state of uplink transmission according to the command information.
Illustratively, the beam state may include at least one of Quasi Co-Location (QCL) state, TCI state, spatial relationship Information (spatial relationship Information), Reference Signal Information (RSI), spatial filter Information (spatial filter Information), and precoding Information (precoding Information).
The uplink transmission includes: PUSCH transmission, PUCCH transmission, or SRS transmission.
S103, determining the path loss of uplink transmission according to a preset mode under the condition that the PL-RS associated with the beam state is not maintained for PL measurement.
The PL-RS can be understood as RS used for PL measurement, and the PL measurement of PL-RS which is not maintained can also be understood as PL measurement of PL-RS is in a non-effective state. For example, if the RS for PL measurement is activated, has not been measured, or is being monitored or measured, but the number of measurements does not reach a predetermined number, then PL cannot be applied.
Alternatively, the above-described non-maintained PL measurements may be PL-RS inactive or not monitored.
That is, when the PL-RS associated with the beam state is not maintained with PL measurement, the first communication node determines the path loss of uplink transmission according to a preset manner.
In the embodiment of the application, the first communication node acquires the command information, determines the beam state of uplink transmission according to the command information, and can determine the path loss of uplink transmission in a preset mode under the condition that the PL-RS associated with the beam state is not measured by the maintenance PL.
In an embodiment, in a case that the beam state is not associated with the PL-RS, the first communication node may also determine the path loss of the uplink transmission according to a preset manner.
In an embodiment, the determining the path loss of the uplink transmission according to the preset method in step S102 may include at least one of the following methods, for example:
and in the first mode, determining the path loss of uplink transmission according to the PL-RS parameter corresponding to the minimum PL-RS parameter number of the PL-RS parameter pool. For example, determining the path loss of uplink transmission according to the PL-RS corresponding to the minimum PL-RS parameter number of the PL-RS parameter pool of the PUSCH; wherein the pool of PL-RS parameters comprises at least one PL-RS parameter, each PL-RS parameter being identified by a PL-RS parameter number.
Determining the path loss of uplink transmission according to a path loss reference signal corresponding to the minimum association identifier in the association of the SRS resource indication SRI and the power control parameter;
determining the path loss of uplink transmission according to a reference signal (for example, a downlink reference signal, a periodic or semi-continuous reference signal, etc.) corresponding to a control resource set (CORESET) with the smallest number;
determining the path loss of uplink transmission according to the TCI state of the CORESET with the minimum number in the activated Bandwidth Part (BWP) or the RS resource of type D in the QCL hypothesis;
the QCL has four types, namely QCL-type A, QCL-type B, QCL-type C and QCL-type D, and the four types respectively correspond to different QCL parameters. For example,
QCL-type A: { Doppler shift, Doppler spread, average delay, delay spread };
QCL-type B: { doppler shift, doppler spread };
QCL-TypeC: { doppler shift, average delay };
QCL-type D: { Spatial Rx parameter.
Determining the path loss of uplink transmission according to the reference signal corresponding to the CORESET with the minimum number and associated with the same CORESET pool in the activated BWP; for example, in the case that the command information is DCI, the CORESET pool ID of the CORESET corresponding to the search space of the PDCCH including the DCI may correspond to at least one CORESET, where the reference signal corresponding to the CORESET with the smallest number determines the path loss of the uplink transmission.
And a sixth mode of determining the path loss of uplink transmission according to the RS resource of the period of the TCI state or the type D in the QCL hypothesis of the CORESET with the minimum number and the command information in the activated BWP.
And determining the path loss of uplink transmission according to the activated TCI state with the minimum number of the PDSCH or the RS resource of the TCI state code. Each value of TCI state code may indicate a pre-specified combination of TCI states, including one or more TCI states.
And determining the path loss of uplink transmission according to the activated TCI state with the minimum number of the PDSCH in the activated downlink BWP or the RS resource of the TCI state code.
Optionally, the first communication node may also determine the path loss of uplink transmission according to a preset manner, and determine the path loss of uplink transmission by using the new PL-RS after the new PL-RS becomes effective.
And the new PL-RS is the beam state of uplink transmission determined according to the command information, such as the PL-RS associated with the TCI state. Alternatively, the new PL-RS may be a beam status of uplink transmission determined according to the command information, such as DL-RS in TCI state.
The first communication node receives the order information and, in the event that the beam state associated PL-RS is not maintained for PL measurements, the beam state associated PL-RS is activated, i.e. the PL-RS starts to be monitored and used for PL measurements. After the PL number of measurements, or the number of transmissions of the PL-RS, reaches a predetermined number, the PL of the PL-RS takes effect, i.e., the PL-RS is in a state of being maintained in PL measurement, wherein the predetermined number may be 3, 5, or other positive integer.
In one embodiment, the first communications node may determine the path loss for uplink transmissions from the PL of the beam state associated PL-RS in the event that the PL of the beam state associated PL-RS is maintained for PL or in the event that the PL of the beam state associated PL-RS is validated. The PL validation time of the PL-RS may be a predefined time, a base station configured time, or the validation time may be related to the capabilities of the first communication node.
In one embodiment, in the case that the PL of the PL-RS associated with the beam state is not validated or the PL-RS associated with the beam state is not maintained for PL, the first communication node waits for the PL of the PL-RS to be validated or the PL-RS associated with the beam state is maintained for PL before using for uplink transmission.
Alternatively, the TCI state for downlink transmission indicated by the restriction command information must be associated with a power control parameter (e.g., indicated by RRC or MAC CE), and the PL-RS must be in a PL active state (or a state in which the PL-RS is maintained with PL). I.e. RRC or MAC CE is responsible for activating PL-RS, the PL-RS indicated by DCI cannot be used by uplink transmission before PL takes effect.
Fig. 2 is a flowchart of a closed-loop power control determination according to an embodiment of the present application, where the method may be applied to a first communication node, for example, a UE, a terminal, and the like in a communication system. As shown in fig. 2, the method may include the steps of:
s201, when the association relationship between the reference signal and the power control parameter is provided, or when the power control parameter in the association relationship between the reference signal and the power control parameter is changed, resetting a closed-loop power control adjustment amount corresponding to the closed-loop power control parameter in the association relationship between the reference signal and the power control parameter.
For example, the closed-loop power control adjustment amount corresponding to the closed-loop power control parameter in the association relationship between the reference signal and the power control parameter may also be reset when the association relationship between the reference signal and the power control parameter is provided and the power control parameter in the association relationship between the reference signal and the power control parameter is changed.
Illustratively, the reference signal may include at least one of SRI, spatial relationship, TCI state, CSI-RS, SSB, SRS, and the association relationship between the reference signal and the power control parameter may include an association relationship number between the reference signal and the power control parameter, and the power control parameter. The association relation number of the reference signal and the power control parameter may correspond to the value of the reference signal one to one, and the power control parameter may include at least one of an open-loop power control parameter, a closed-loop power control parameter, and a path loss measurement parameter.
Illustratively, the open-loop power control parameter may include the target received power P0, and/or a path loss compensation factor alpha. The open-loop power control parameters are indicated by open-loop power control parameter numbers and are used for identifying one or a group of open-loop power control parameters in a pre-configured open-loop power control parameter pool. For example, a set of open-loop power control parameters includes P0 and alpha.
The closed-loop power control parameter may include a closed-loop power control number.
The path loss measurement parameter may include resources of a reference signal PL-RS used to measure the path loss. The path loss measurement parameter is indicated by a path loss measurement parameter number and is used for identifying one path loss measurement parameter in a preconfigured path loss measurement parameter pool.
Alternatively, the providing may be understood as configuring, reconfiguring, re-providing, updating, activating, or augmenting.
In one example, the association relationship between the reference signal and the power control parameter may be provided by at least one of a higher layer parameter and a MAC CE.
In an example, the change of the power control parameter in the association relationship between the reference signal and the power control parameter may include at least one of the following situations:
for example, the open-loop power control parameter in the correlation between the reference signal and the power control parameter is changed;
changing closed-loop power control parameters in the incidence relation between the reference signals and the power control parameters;
the path loss measurement parameter in the correlation of the reference signal and the power control parameter is changed.
For example, assuming that the power control parameter contained before updating in the association relationship between the reference signal and the power control parameter containing the association relationship number 0 of the reference signal and the power control parameter is a, after the association relationship between the reference signal and the power control parameter containing the association relationship number 0 of the reference signal and the power control parameter is re-provided, the included power control parameter is updated to B, where a and B are different, that is, the power control parameter containing the association relationship number 0 of the reference signal and the power control parameter is changed.
The closed-loop power control adjustment amount corresponding to the closed-loop power control parameter in the association relationship between the reset reference signal and the power control parameter is further described with specific examples.
For example, in the case that the reference signal is an SRI, the association relationship between the SRI and the power control parameter may be updated by RRC. Assuming that the association relationship between the SRI and the power control parameter before updating includes a first value in the open-loop power control parameter pool, and the association relationship after updating includes values at other positions, for example, a second value, that is, the value of the open-loop power control parameter in the association relationship between the SRI and the power control parameter changes, the closed-loop power control adjustment amount corresponding to the closed-loop power control parameter in the association relationship between the SRI and the power control parameter is reset.
Or, in the case that the reference signal is the SRI, updating the association relationship between the SRI and the power control parameter through the MAC CE. Assuming that the association relationship between the SRI and the power control parameter before updating includes a first value in the path loss measurement parameter pool, and the association relationship after updating includes a second path loss parameter in the path loss parameter pool, that is, the path loss measurement parameter in the association relationship between the SRI and the power control parameter changes, the closed-loop power control adjustment amount corresponding to the closed-loop power control parameter in the association relationship between the SRI and the power control parameter is reset.
Illustratively, in the above-mentioned resetting process, the changing of the open-loop power control parameter, the changing of the closed-loop power control parameter, or the changing of the path loss measurement parameter may include: the parameter pools are unchanged and the number of the new parameter in the parameter pool is changed, or the number of the new parameter in the parameter pool is unchanged and the parameter pool is changed. It is understood that the above parameter change means that the corresponding power control parameter in the association relationship between the reference signal and the power control parameter is changed.
Note that the reset closed-loop power control adjustment amount may be understood as a power control adjustment state. The closed-loop power control adjustment quantity can be determined by a TPC command, and the closed-loop power control adjustment quantity can support an accumulative mode and an absolute value mode, wherein the accumulative closed-loop power control adjustment quantity is the sum of a value indicated by a new TPC command and a historical closed-loop power control adjustment quantity, and the absolute value closed-loop power control adjustment quantity is only equal to the value indicated by the new TPC command.
Optionally, resetting the closed-loop power control adjustment amount may include setting a value of the closed-loop power control adjustment amount to 0. For example, f (k, l) in the PUSCH power control parameter is 0, where k is 0, 1.
In order for the base station to know the gap between the transmission Power level of the UE and the maximum transmission Power, PHR (Power Headroom Report) is introduced. The PHR is defined as the difference between the maximum transmit power and the power required for uplink transmission. The power required for uplink transmission only considers the power control related parameters in calculation, and does not need to consider the limitation of the maximum transmission power, and thus may be greater than the maximum transmission power. In the embodiment of the present application, PHR and PH (Power Headroom) may be interchanged.
Different types of PHR are supported according to different transmission types:
type 1PHR is calculated based on PUSCH transmission. The PHR calculated based on the real PUSCH transmission is called the real PHR of type1, and the PHR calculated based on the format of the PUSCH reference is called the virtual PHR of type 1.
the type 3PHR is calculated based on SRS transmission. The PHR calculated based on the SRS transmission also includes a real PHR and a virtual PHR. The PHR of Type 3 is used for a carrier/cell where PUSCH or PUCCH is not configured. The PHR of Type 3 is also divided into a real PHR and a virtual PHR, which are calculated based on a real SRS transmission or an SRS reference format, respectively.
The closed-loop power control adjustment amount is also considered when calculating the virtual PHR, for example, f (i, l) in PUSCH transmission, where i is a PUSCH transmission opportunity number and l is a closed-loop power control number of PUSCH transmission. The closed-loop power control adjustment amount in the SRS transmission is h (i, l), where i is the SRS transmission opportunity number and l is the closed-loop power control number of the SRS transmission.
Fig. 3 is a flowchart of a method for determining a power control margin according to an embodiment of the present disclosure, where the method may be applied to a first communication node, for example, a UE, a terminal, and the like in a communication system. As shown in fig. 3, the method may include the steps of:
s301, determining a closed loop power control adjustment amount of the virtual transmission according to at least one of the starting time of the virtual transmission and the accumulation interval of the TPC command of the virtual transmission.
In the embodiment of the present application, since the dummy transmission itself does not have the transmission start time, the start time of the dummy transmission is determined according to the start time of the timeslot corresponding to the dummy transmission.
Alternatively, the end time of the TPC command accumulation interval of the virtual transmission may be determined by the start time of the virtual transmission and a parameter K, where the parameter K is a preconfigured value. E.g., determined by the minimum value of the RRC parameter k 2.
And S302, determining the power margin of virtual transmission according to the closed-loop power control adjustment quantity of the virtual transmission.
After determining the closed-loop power control adjustment amount for the virtual transmission based on step S301, the power headroom for the virtual transmission may be determined based on the closed-loop power control adjustment amount.
In this embodiment, after determining the closed-loop power control adjustment amount of the virtual transmission according to at least one of the start time of the virtual transmission and the accumulation interval of the TPC command, the power headroom of the virtual transmission may be determined based on the closed-loop power control adjustment amount of the virtual transmission.
Optionally, in the above scheme, the end time of the TPC command accumulation interval of the i0 th transmission before the virtual transmission is earlier than the end time of the TPC command accumulation interval of the virtual transmission, where i0 is the smallest positive integer that satisfies this condition. The start time of the i0 th transmission precedes the start time of the virtual transmission, and the i0 th transmission includes a virtual or real transmission of the same type as the virtual transmission. For example, if the virtual transmission is a PUSCH transmission, the first i0 th transmission refers to a virtual or real PUSCH transmission. When the virtual transmission is an SRS transmission, the preceding i0 th transmission refers to a virtual or real SRS transmission.
In one example, the end time of the TPC command accumulation interval for the virtual transmission may include a time period determined by the parameter K before the start time of the virtual transmission, and determining the resulting time point as the end time of the TPC command accumulation interval for the virtual transmission by advancing the time period by the start time of the virtual transmission.
In one example, the virtual transmission may include a reference PUSCH transmission, or a reference SRS transmission. For example, in the closed-loop power control adjustment amount f (i, l) in the PUSCH transmission, i is the number of the PUSCH transmission opportunity, and l is the closed-loop power control number of the PUSCH transmission; in the closed-loop power control adjustment amount h (i, l) in SRS transmission, i is the number of SRS transmission timing, and l is the closed-loop power control number of SRS transmission. That is, the virtual transmission timing i can be used to calculate the power headroom of the virtual transmission, and starting from the requirement of updating f (i, l), i is accumulated and counted together with the transmission timing of the real PUSCH.
Exemplarily, assuming that the virtual transmission is a virtual PUSCH transmission, the closed-loop power control adjustment amount of the PUSCH may be expressed as
Figure BDA0002628326830000091
Where subscript c denotes a serving cell, subscript f denotes a carrier, subscript b denotes an Uplink BWP (UL BWP), l denotes a PUSCH closed-loop power control l,PUSCH,b,f,cis determined by a predetermined table.
Figure BDA0002628326830000092
Represents the sum of TPC command values in the set Di of TPC command values for closed loop power control l of PUSCH received by the user equipment over a period of time. The period of time refers to the PUSCH transmission occasion i-i on UL BWP b of serving cell c carrier f0Front KPUSCH(i-i0) -l symbol until K before PUSCH transmission opportunity iPUSCH(i) Symbol in which i0If > 0, the PUSCH transmission time i-i is satisfied0Front KPUSCH(i-i0) Symbol K before PUSCH transmission opportunity iPUSCH(i) Early minimum integer。
In the case where the PUSCH is a reference PUSCH transmission, the start time of the PUSCH transmission opportunity may be the start position of the slot in which the reference PUSCH transmission is located. That is, the virtual transmission start time is determined by the start time of the slot corresponding to the virtual transmission. Accordingly, in this case, KPUSCH(i) The (i.e., K value) is a parameter determined by the minimum value of the higher-layer configured parameter K2. For example, KPUSCH(i) For the number of symbols in a slot
Figure BDA0002628326830000093
Product with the minimum value of k2 in the PUSCH-ConfigCommon parameter configured on the activated UL BWP b for carrier f of serving cell c. That is, the TPC command accumulation interval end point of the virtual transmission is advanced by the virtual transmission start time by a time determined by the minimum value of k 2.
The above-described process is described in further detail below with specific examples.
As shown in fig. 4, DCI #1, #2, #5 schedules PUSCH transmissions i-2, i, and i +1, respectively, including TPC1, TPC2, TPC5, respectively; DCI #3 and #4 are DCI format 2_2, which respectively indicate TPC3 and TPC4, but do not schedule PUSCH transmission; PUSCH transmission i-1 is a virtual transmission without corresponding DCI. According to the above rule, the cumulative time periods of the TPC commands of the closed loop power control adjustment amounts corresponding to i-1, i and i +1 for PUSCH transmission and the calculation manners of f (i-1), f (i) and f (i +1) are respectively as follows:
f(i-1)＝f(i-2)+TPC2+TPC3 (2)
f(i)＝f(i-2)+TPC2 (3)
f(i+1)＝f(i)+TPC3+TPC4+TPC5 (4)
where Kmin, noted in fig. 4, is the amount of time determined by the minimum value of the parameter k 2.
Fig. 5 is a path loss determining apparatus according to an embodiment of the present application, and as shown in fig. 5, the apparatus includes: a receiving module 501 and a determining module 502;
the acquisition module is used for receiving command information;
the determining module is used for determining the beam state of uplink transmission according to the command information;
and the determining module is used for determining the path loss of uplink transmission according to a preset mode under the condition that the P-RS associated with the beam state is not maintained by PL measurement.
In one example, the command information includes at least one of DCI, MAC CE, and higher layer signaling.
In one example, the beam state may include at least one of a Quasi Co-Location (QCL) state, a TCI state, spatial relationship Information (spatial relationship Information), Reference Signal Information (RSI), spatial filter Information (spatial filter Information), and precoding Information (precoding Information).
In one example, the determining module may be configured to perform one or more of the following determining manners, for example:
determining the path loss of uplink transmission according to the PL-RS corresponding to the minimum PL-RS parameter number of the PL-RS parameter pool;
determining the path loss of uplink transmission according to a path loss reference signal corresponding to the minimum association identifier in the association of the SRS resource indication SRI and the power control parameter;
determining the path loss of uplink transmission according to the reference signal (for example, a downlink reference signal, a periodic or semi-continuous reference signal, and the like) corresponding to the CORESET with the smallest number;
determining the path loss of uplink transmission according to the RS resource of the TCI state of the CORESET with the minimum number in the activated Bandwidth Part (BWP) or the type D in the QCL hypothesis;
determining the path loss of uplink transmission according to the reference signal corresponding to the CORESET with the minimum number and associated with the same CORESET pool in the activated BWP;
and sixthly, determining the path loss of uplink transmission according to the RSs resource of the period of the TCI state or the type D in the QCL hypothesis of the CORESET with the minimum number and the command information in the activated BWP.
And determining the path loss of uplink transmission according to the activated TCI state with the minimum number of the PDSCH or the RS resource of the TCI state code. Wherein, each value of the TCI state code may indicate a pre-specified combination of TCI states, and the combination of TCI states includes one or more TCI states.
And determining the path loss of uplink transmission according to the activated TCI state with the minimum number of the PDSCH in the activated downlink BWP or the RS resource of the TCI state code.
In one example, the determining module may determine the path loss for the uplink transmission with the PL of the beam state associated PL-RS in a case where the PL of the beam state associated PL-RS is maintained for PL or in a case where the PL of the beam state associated PL-RS is validated.
The path loss determining apparatus provided in this embodiment is used to implement the path loss determining method in the embodiment shown in fig. 1, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 6 is a closed-loop power control determining apparatus according to an embodiment of the present application, and as shown in fig. 6, the apparatus includes: a reset module 601;
the resetting module is configured to reset a closed-loop power control adjustment amount corresponding to a closed-loop power control parameter in an association between a reference signal and a power control parameter when the association between the reference signal and the power control parameter is provided, or when the power control parameter in the association between the reference signal and the power control parameter is changed.
For example, the reset module may also be configured to reset the closed-loop power control adjustment amount corresponding to the closed-loop power control parameter in the association relationship between the reference signal and the power control parameter when the association relationship between the reference signal and the power control parameter is provided and the power control parameter in the association relationship between the reference signal and the power control parameter is changed.
The correlation between the reference signal and the power control parameter includes: the reference signal and the incidence relation number of the power control parameter, and the power control parameter, wherein the power control parameter may include at least one of an open-loop power control parameter, a closed-loop power control parameter, and a path loss measurement parameter.
For example, the change of the power control parameter in the association relationship between the reference signal and the power control parameter may include at least one of:
the open-loop power control parameters in the incidence relation between the reference signals and the power control parameters are changed;
changing closed-loop power control parameters in the incidence relation between the reference signals and the power control parameters;
the path loss measurement parameter in the correlation of the reference signal and the power control parameter is changed.
Optionally, the association relationship between the reference signal and the power control parameter may be provided by at least one of a higher layer parameter, or a MAC CE.
The closed-loop power control determining apparatus provided in this embodiment is used to implement the closed-loop power control determining method in the embodiment shown in fig. 2, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 7 is a power headroom determining apparatus provided in an embodiment of the present application, and as shown in fig. 7, the apparatus includes: a determination module 701;
a determining module, configured to determine a closed-loop power control adjustment amount of virtual transmission according to at least one of a start time of the virtual transmission and an accumulation interval of a TPC command of the virtual transmission; and determining the power margin of the virtual transmission according to the closed-loop power control adjustment quantity of the virtual transmission.
For example, the start time of the virtual transmission may be determined according to the start time of the timeslot corresponding to the virtual transmission.
In one example, the TPC command accumulation interval for the i0 th transmission before the virtual transmission ends earlier than the TPC command accumulation interval for the virtual transmission, where i0 is the smallest positive integer that satisfies this condition.
In one example, the end time of the TPC command accumulation interval of the virtual transmission is determined by the start time of the virtual transmission and a parameter K, the parameter K being a preconfigured value. The end time of the TPC command accumulation interval of the virtual transmission may include a time period determined by the parameter K before the start time of the virtual transmission, that is, a time period determined by the parameter K, and the obtained time point is determined as the end time of the TPC command accumulation interval of the virtual transmission by advancing the time period at the start time of the virtual transmission.
The virtual transmission may include a reference PUSCH transmission, or a reference SRS transmission.
The power headroom determining apparatus provided in this embodiment is used to implement the power headroom determining method in the embodiment shown in fig. 3, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 8 is a schematic structural diagram of a first communication node according to an embodiment of the present application, and as shown in fig. 8, the first communication node includes a processor 801 and a memory 802; the number of the processors 801 in the communication node may be one or more, and one processor 801 is taken as an example in fig. 8; the processor 801 and the memory 802 in the communication node may be connected by a bus or other means, which is exemplified in fig. 8.
The memory 802 is a computer-readable storage medium that can be used for storing software programs, computer-executable programs, and modules, such as program instructions/modules (e.g., the receiving module 501 and the determining module 502 in fig. 5) corresponding to the methods in the embodiments of fig. 1, fig. 2, and fig. 3. The processor 801 implements the methods described above in the embodiments of fig. 1, 2, and 3 by executing software programs, instructions, and modules stored in the memory 802.
The memory 802 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the set-top box, and the like. Further, the memory 802 may include high speed random access memory and may also include non-volatile memory such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device.
In an example, the processor in the node may also implement the above information indication method through a hardware circuit such as a logic circuit, a gate circuit, etc. therein, where possible.
The embodiment of the application also provides a readable and writable storage medium for computer storage, where the storage medium stores one or more programs, and when the one or more programs are executable by one or more processors, the method provided in the embodiments of fig. 1, fig. 2, and fig. 3 may be implemented.
It will be understood by those skilled in the art that all or some of the steps of the methods disclosed above, functional modules/units in the communication node may be implemented as software, firmware, hardware or a suitable combination thereof.
In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
The foregoing description of the exemplary embodiments of the present application with reference to the accompanying drawings is merely illustrative and not intended to limit the scope of the invention. Any modifications, equivalents and improvements which may occur to those skilled in the art without departing from the scope and spirit of the present invention are intended to be within the scope of the claims.

Claims (17)

1. A method for determining path loss, applied to a first communication node, comprising:
acquiring command information;
determining the beam state of uplink transmission according to the command information;
and under the condition that the reference signal PL-RS used for path loss measurement and associated with the beam state is not maintained for path loss PL measurement, determining the path loss of uplink transmission according to a preset mode.
2. The method of claim 1, wherein the command information comprises at least one of: downlink control information DCI, a media access control unit MAC CE and a high-level signaling.
3. The method of claim 1, wherein the beam state comprises at least one of:
quasi co-location state, transmission configuration indication state, spatial relationship information, reference signal information, spatial filter information, precoding information.
4. The method of claim 1, wherein the determining the path loss of the uplink transmission according to the preset pattern comprises one of:
determining the path loss of the uplink transmission according to the PL-RS corresponding to the minimum PL-RS parameter number of the PL-RS parameter pool of the path loss reference signal;
determining the path loss of the uplink transmission according to a path loss reference signal corresponding to the minimum association identifier in the association of the sounding reference signal resource indication information and the power control parameter;
determining the path loss of the uplink transmission according to a reference signal corresponding to a control resource set CORESET with the minimum number;
determining the path loss of the uplink transmission according to the RS resource of type D in the TCI state or QCL hypothesis of the CORESET with the smallest number in the activated bandwidth part BWP;
determining the path loss of the uplink transmission according to a reference signal corresponding to the CORESET with the minimum number, which is associated with the command information to the same control resource pool CORESET pool in the activated BWP;
and determining the path loss of the uplink transmission according to the RS resource of the period of type D in the TCI state or QCL hypothesis of the CORESET with the smallest number and associated with the command information to the same CORESET pool in the activated BWP.
5. The method of claim 1, further comprising:
determining the path loss of the uplink transmission according to the PL of the PL-RS associated with the beam state under the condition that the PL of the PL-RS associated with the beam state is maintained by PL;
or determining the path loss of the uplink transmission according to the PL of the PL-RS associated with the beam state under the condition that the PL of the PL-RS associated with the beam state is effective.
6. A closed-loop power control determination method applied to a first communication node includes:
and resetting a closed-loop power control adjustment amount corresponding to the closed-loop power control parameter in the incidence relation between the reference signal and the power control parameter when the incidence relation between the reference signal and the power control parameter is provided or when the power control parameter in the incidence relation between the reference signal and the power control parameter is changed.
7. The method of claim 6, wherein the correlation between the reference signal and the power control parameter comprises: the incidence relation number of the reference signal and the power control parameter;
wherein the power control parameter includes at least one of:
open-loop power control parameters, closed-loop power control parameters, and path loss measurement parameters.
8. The method according to claim 6 or 7, wherein the change of the power control parameter in the correlation between the reference signal and the power control parameter comprises at least one of:
the open-loop power control parameter in the incidence relation between the reference signal and the power control parameter is changed;
the closed-loop power control parameters in the incidence relation between the reference signals and the power control parameters are changed;
and the path loss measurement parameter in the incidence relation between the reference signal and the power control parameter is changed.
9. The method according to any of claims 6-8, wherein the association of the reference signal with the power control parameter is provided by at least one of a higher layer parameter, or a MAC CE.
10. A method for determining power control margin is applied to a first communication node, and comprises the following steps:
determining a closed-loop power control adjustment amount of virtual transmission according to at least one of the starting time of the virtual transmission and the accumulation interval of the Transmission Power Control (TPC) command of the virtual transmission;
and determining the power margin of the virtual transmission according to the closed-loop power control adjustment quantity of the virtual transmission.
11. The method of claim 10, wherein the start time of the dummy transmission is determined according to the start time of the slot corresponding to the dummy transmission.
12. The method of claim 10 or 11, wherein the TPC command accumulation interval for the i0 th transmission before the virtual transmission has an end time earlier than the TPC command accumulation interval for the virtual transmission, where i0 is the smallest positive integer that satisfies the above condition.
13. The method of claim 12, wherein an end time of the TPC command accumulation interval for the virtual transmission is determined by a start time of the virtual transmission and a parameter K, wherein the parameter K is a preconfigured value.
14. The method of claim 13, wherein the end time of the TPC command accumulation interval for the virtual transmission comprises a time before the start time of the virtual transmission determined by a parameter K, the parameter K being a preconfigured value.
15. The method of claim 14, wherein the virtual transmission comprises a reference physical uplink shared channel transmission or a reference channel sounding reference signal transmission.
16. A node, comprising: a processor implementing the path loss method according to any one of claims 1 to 5, or the closed loop power control determination method according to any one of claims 6 to 9, or the power control margin determination method according to claims 10 to 15 when a program stored in a memory is executed by the processor.
17. A readable and writable storage medium for computer storage, wherein the storage medium stores one or more programs executable by one or more processors to implement a path loss method according to any one of claims 1-5, or a closed loop power control determination method according to any one of claims 6-9, or a power control margin determination method according to claims 10-15.
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