CN109219120B

CN109219120B - Method and equipment for controlling uplink power

Info

Publication number: CN109219120B
Application number: CN201810031000.6A
Authority: CN
Inventors: 付景兴; 喻斌; 钱辰; 熊琦
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2017-07-03
Filing date: 2018-01-12
Publication date: 2021-10-26
Anticipated expiration: 2038-01-12
Also published as: CN109219120A

Abstract

The application discloses a method of a method for controlling uplink power, which is applied to UE and comprises the following steps: determining the timing relation between a power control command and an uplink physical control channel for performing power control by applying the power control command; and according to the determined timing relation, adjusting the transmission power of the corresponding uplink physical control channel according to the power control command. The application also discloses a corresponding device. By applying the method and the device, the problem of uplink power control can be solved.

Description

Method and equipment for controlling uplink power

Technical Field

The present application relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for uplink power control.

Background

The Long Term Evolution (LTE) technology supports two duplex modes, Frequency Division Duplex (FDD) and Time Division Duplex (TDD). Fig. 1 is a frame structure diagram of a TDD system of LTE. Each radio frame is 10 milliseconds (ms) in length, and is equally divided into two half frames with a length of 5ms, each half frame includes 8 time slots with a length of 0.5ms and 3 special domains with a length of 1ms, the 3 special domains are respectively a Downlink pilot time slot (DwPTS), a Guard interval (GP), and an Uplink pilot time slot (UpPTS), and each subframe is composed of two continuous time slots.

Transmissions in a TDD system include: transmissions from a base station to a User Equipment (UE) (referred to as downlink) and transmissions from the UE to the base station (referred to as uplink). Based on the frame structure shown in fig. 1, 10 subframes are shared by uplink and downlink within 10ms, each subframe is configured to either uplink or downlink, the subframe configured to uplink is referred to as an uplink subframe, and the subframe configured to downlink is referred to as a downlink subframe. The TDD system supports 7 uplink and downlink configurations, as shown in table 1, D represents a downlink subframe, U represents an uplink subframe, and S represents the above-mentioned special subframe including 3 special fields.

TABLE 1

Hybrid Automatic Repeat request-Acknowledgement (HARQ-ACK) information of a Physical Downlink Shared Channel (PDSCH) may be transmitted in a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH). For the PDSCH-to-PUCCH timing relationship, assuming that the UE feeds back HARQ-ACK information on the PUCCH of the uplink subframe n, the PUCCH indicates HARQ-ACK of PDSCH or SPS release in the downlink subframe n-k. Where K ∈ K, the value of K is defined in Table 2, K being M elements { K ∈ K [ ]₀,k₁,…k_M-1The set of the foregoing is related to the subframe number and the TDD uplink/Downlink configuration, and is called a Downlink association set (Downlink association set), and the element k is called a Downlink association element. The downlink subframe corresponding to the downlink association set is referred to as a Bundling Window (Bundling Window) in the following text, that is, for all elements K in K, a set { n-K, K ∈ K } composed of n-K. Each PDSCH of each downlink subframe is allocated with one PUCCH resource feedback HARQ-ACK information in the PUCCH subframe. For FDD, M equals 1 and k equals 4.

TABLE 2

According to the existing LTE specifications, the transmission power of the PUCCH channel in subframe i of serving cell c is determined according to the following equation:

the definition of each parameter in the formula is detailed in chapter 5.1.2.1 of release 10.9.0 of the third Generation Partnership Project (3 GPP) specification 36.213, and is briefly described as follows:

P_CMAX,c(i) is the maximum transmission power on the configured UE's serving cell c;

Δ_{F_PUCCH}(F) is the power offset relative to the reference format (in LTE the reference format is PUCCH format 1 a);

Δ_TxD(F') is a parameter related to PUCCH format and whether transmit diversity is employed;

PL_cis the link loss;

P_{O_PUCCH}is a power offset value for a higher layer signaling configuration;

g (i) is the accumulated value of closed loop power control;

h(n_CQI,n_HARQ,n_SR) Is a power offset, which is related to the PUCCH format and the number of bits of Uplink Control Information (UCI) that needs to be fed back, n_CQIIs the bit number of Channel State Information (CSI) to be fed back in subframe i, n_SRIs the bit number of the Scheduling Request (SR) to be fed back in the subframe i, and takes the value of 0 or 1, n_HARQThe number of bits of an effective Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) to be fed back actually in the subframe i. For PUCCH format 3, for example, when CSI needs to be fed back,

g (i) is according to the formula

And (6) obtaining.

Where i is the current subframe.

For FDD, M equals 1 and k₀Equal to 4;

for TDD, M and k_mObtained according to table 2. For example, for TDD uplink downlink configuration 1, for uplink subframe 2, M equals 2, k₀Is equal to 6, k₁Equal to 7, that is, in PUCCH transmitted in subframe 2, PDSCH generating HARQ-ACK is transmitted in subframe (2-6+10 ═ 6) and subframe (2-7+10 ═ 5), and power control commands for

subframes

5, 6 of the last radio frame are applied to PUCCH transmission in subframe 2 of the current radio frame, as shown in fig. 2.

δ_PUCCHIs a power adjustment value obtained from a transmission power control command (TPC command). The TPC command includes a TPC command in Downlink Control Information (DCI) in a PDCCH that schedules the PDSCH (e.g., DCI format 1A), and a TPC command in DCI shared by a plurality of UEs (e.g., DCI format 3/3a), also referred to as UE-group DCI. The correspondence between the TPC command and the power adjustment value is shown in table 3 and table 4.

TABLE 3

Value of TPC Command field in DCI Format 3A	δ_PUCCH[dB]
		0	-1
1	1

TABLE 4

Disclosure of Invention

The application provides a method and equipment for uplink power control, so that the power control of a PUCCH is more effective.

The method for controlling uplink power provided by the application is applied to UE and comprises the following steps:

determining the timing relation between a power control command and an uplink physical control channel for performing power control by applying the power control command;

and according to the determined timing relation, adjusting the transmission power of the corresponding uplink physical control channel according to the power control command.

Preferably, the power control command is: a user equipment group UE-group power control command, one downlink control information DCI transmits at least one power control command, and each power control command is directed at one UE;

the UE determines the timing relation between the UE-group power control command and a physical uplink control channel PUCCH for applying the UE-group power control command to carry out power control by receiving explicit signaling or implicit signaling from a base station or by a preset method.

Preferably, the method for receiving the display command from the base station includes:

the UE-group power control command is transmitted in a time slot n-k, a PUCCH which adjusts the power by applying the power control command is transmitted in the time slot n, the UE obtains a k value through an explicit signaling received from a base station, the k is an integer which is more than or equal to 0, and the k values are the same or different for different UEs in the same group;

or, the UE-group power control command is transmitted in a time slot n-k, the PUCCH which adjusts the power by applying the power control command is transmitted in the time slot n, the UE obtains a k value by combining explicit signaling and physical layer signaling, or obtains the k value by physical layer signaling, wherein k is an integer which is greater than or equal to 0.

Preferably, the means for obtaining k value through physical layer signaling comprises at least one of the following means:

the first method is as follows: the power control command TPC timing relation sets of different UEs transmitting power control commands in the same UE-group DCI are the same; the DCI of the UE-group power control command also has TPC timing relation indication information besides the power control command of each UE, the UE determines one value in a TPC timing relation set according to the TPC timing relation indication information as a time interval ki between the UE-group power control command of the UE and a PUCCH which applies the UE-group power control command to adjust power, and the time interval value indicated by the TPC timing relation indication information is applied to all the UEs in the UE-group;

the second method comprises the following steps: the TPC timing relationship sets of different UEs transmitting power control commands in the same UE-group DCI are different; the DCI of the UE-group power control command also has TPC timing relation indication information besides the power control command of each UE, the UE determines a value in a corresponding TPC timing relation set according to the TPC timing relation indication information as a time interval ki between the UE-group power control command of the UE and a PUCCH which applies the UE-group power control command to adjust power, and the time interval value indicated by the TPC timing relation indication information is applied to all the UEs in the UE-group;

the third method comprises the following steps: the TPC timing relationship sets of different UEs transmitting power control commands in the same UE-group DCI are the same or different; besides the power control command of each UE, the DCI of the UE-group power control command also has a TPC timing relation indication information corresponding to each UE, and each UE determines a value in a corresponding TPC timing relation set according to the TPC timing relation indication information as a time interval ki between the UE-group power control command of the UE and the PUCCH for adjusting the power by applying the UE-group power control command.

Preferably, at least two PUCCHs are subjected to time division multiplexing transmission in one slot;

the timing relationship between the power control command and the uplink control channel for performing power control by applying the power control command is as follows: a timing relationship between DCI transmitting TPCs and PUCCH transmitting power control applying the TPCs, wherein the TPCs comprise TPCs in UE-group common DCI.

Preferably, the adjusting, according to the determined timing relationship, the transmission power of the corresponding uplink physical control channel according to the power control command includes: and determining TPC corresponding to each PUCCH according to the timing relation between the DCI for transmitting the TPC and PUCCH transmission for performing power control by applying the TPC, and calculating the accumulated value of closed-loop power control of each PUCCH according to the determined TPC.

Preferably, the accumulated value of closed loop power control of each PUCCH is calculated according to at least one of the following methods:

the method comprises the following steps: for each PUCCH respectively according to

Calculating an accumulated value g _ n (i) of closed-loop power control, wherein n is the sequence number of the PUCCH, and g (i-1) is equal to the accumulated value of closed-loop power control of the last PUCCH in the time slot i-1; wherein: delta_PUCCHIs a power adjustment value obtained from the TPC command; m is the total number of TPC commands pointing to the time slot i; m is_iRefer to time slots i-m_iDoes not meet the delay processing requirement, the TPC command of this time slot cannot be applied to calculate g _ n (i);

the second method comprises the following steps: according to

Calculating an accumulated value g (i) of closed-loop power control of the at least two PUCCHs; wherein: delta_PUCCHIs a power adjustment value obtained from the TPC command; m is the total number of TPC commands pointing to the time slot i; m is_iRefer to time slots i-m_iDoes not meet the delay processing requirement, the TPC command for this slot cannot be applied to calculate g (i).

Preferably, the adjusting, according to the determined timing relationship, the transmission power of the corresponding uplink physical control channel according to the power control command includes: and for each PUCCH, performing power control on the PUCCH by using the TPC commands which are not calculated by the accumulated value which is not applied to the previous closed-loop power control in the corresponding DCI and the TPC commands which are not calculated by the accumulated value which is applied to the previous closed-loop power control in the DCI which is not applied to the previous closed-loop power control.

Preferably, when the DCI-1 transmitting the TPC command TPC-1 is transmitted in the slot n-k-l, the DCI-2 transmitting the TPC command TPC-2 is transmitted in the slot n-k, the PUCCH-1 applying the TPC-1 for power control is transmitted in the slot n + p, and the PUCCH-2 applying the TPC-2 for power control is transmitted in the slot n, the PUCCH is power controlled according to at least one of the following methods:

the method comprises the following steps: power adjustment value delta obtained by using TPC-1 and TPC-2_PUCCH(1) And delta_PUCCH(2) Calculating an accumulated value of closed-loop power control of PUCCH-2 transmitted in a time slot n;

the second method comprises the following steps: calculating an accumulated value of closed-loop power control of the PUCCH-1 by using TPC-1; and calculating an accumulated value of closed-loop power control of the PUCCH-2 by using the TPC-2.

The present application also provides an uplink power control device, including: a timing relationship determination module and a power control module, wherein:

the timing relation determining module is used for determining the timing relation between the power control command and an uplink physical control channel for performing power control by applying the power control command;

and the power control module is used for adjusting the transmission power of the corresponding uplink physical control channel according to the determined timing relation and the power control command.

According to the uplink power control method and the uplink power control device, when the fact that the time slot length for transmitting the PUCCH and the time slot length for transmitting the power control command are different is determined, a more effective power control method can be provided, and the power control of the PUCCH is more effective. In addition, by using the application, when the HARQ timing relation of the PDSCH is not determined, the invention provides a method for determining the timing relation between the power control command of the UE group and the PUCCH transmitted by applying the power control command.

Drawings

Fig. 1 is a frame structure diagram of a TDD system of LTE;

FIG. 2 is a diagram of an example HARQ-ACK timing relationship for LTE;

FIG. 3 is a schematic diagram of a basic process for determining a power control timing relationship according to the present application;

FIG. 4 is a timing relationship between a power control command and a power adjustment using the power control command when k values of different UEs in a group are the same according to an embodiment of the present invention;

FIG. 5 is a diagram illustrating timing relationships between power control commands and power adjustments applied by the power control commands when k values of different UEs in a group are different according to an embodiment of the present invention;

fig. 6 is a schematic diagram illustrating a timing relationship between a power control command and a power adjustment by applying the power control command when k values of different UEs in the same group are different under FDD according to an embodiment of the present invention;

fig. 7 is a schematic diagram illustrating a first method for determining a timing relationship set and indicating a specific time interval value in the set through physical layer signaling according to a first embodiment of the present application;

fig. 8 is a schematic diagram of a second method for determining a timing relationship set and indicating a specific time interval value in the set through physical layer signaling according to the first embodiment of the present application;

fig. 9 is a schematic diagram of a third method for determining a timing relationship set and indicating a specific time interval value in the set through physical layer signaling according to the first embodiment of the present application;

fig. 10 is a schematic diagram illustrating that at least two PUCCHs are transmitted in a time division multiplexing manner in one slot in the second embodiment of the present application;

fig. 11 is a schematic diagram illustrating a method for calculating an accumulated value of closed-loop power control of two PUCCHs in the same slot according to a second embodiment of the present application;

fig. 12 is a schematic view of an application scenario in the third embodiment of the present application;

fig. 13 is a schematic diagram illustrating a structure of a preferred uplink power control apparatus according to the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below by referring to the accompanying drawings and examples.

To achieve the objective of the present application, the present application proposes a method for uplink power control, as shown in fig. 2, the method comprising the following steps:

step 301: determining the timing relation between the power control command and an uplink physical control channel applying the power control command;

step 302: and adjusting the transmission power of the uplink physical control channel according to the determined timing relation between the power control command and the uplink physical control channel and the power control command.

At this time, the timing relationship between the PDSCH scheduled by the DCI and the PUCCH for transmitting the HARQ-ACK generated by the PDSCH is dynamically indicated by information in the DCI.

The technical solution of the present application is further described in detail by means of several preferred embodiments.

Example one

This embodiment describes a timing relationship between a UE-group power control command and an uplink PUCCH transmission for performing power control by applying the power control command, where the power control command refers to a common power control command (e.g., a power control command transmitted in DCI format 3/3a of LTE) of a UE group (UE-group), and one DCI may provide the power control command for the PUCCHs of multiple UEs. The PUCCH herein may be used to transmit HARQ-ACK, CSI, UCI of SR, and the like.

At this time, the timing relationship between the PDSCH and the HARQ-ACK generated by the PDSCH is determined by DCI indication in the PDCCH that schedules the PDSCH in combination with higher layer signaling configuration. For example, the base station configures 4 values to the UE through high layer signaling, which are: { k0, k1, k2, k3}, where 2 bits are included in the DCI to indicate that the timing relationship between the PDSCH, which is transmitted in slot n-ki, and the HARQ-ACK generated by the PDSCH, which is transmitted in slot n, is an index of one element in the set { k0, k1, k2, k3}, as shown in table 5. And for different UEs, configuring independent timing relation sets respectively through independent high-layer signaling. At this time, the TPC command included in the DCI in the PDCCH scheduling the PDSCH is also determined according to the timing relationship, for example, the PDSCH is transmitted in slot n-ki, the HARQ-ACK generated by the PDSCH is transmitted in slot n, and the TPC command in the PDCCH scheduling the PDSCH transmitted in slot n-ki is applied to power control of the PUCCH transmitting the HARQ-ACK in slot n. This is a method of performing power control by TPC included in DCI in a PDCCH that schedules PDSCH, the power control command being directed to only one UE.

HARQ-ACK timing relation indication value	PDSCH transmission and HARQ-ACK transmission time interval ki
		00	High layer signaling configured k0
01	High layer signaling configured k1
		10	High layer signaling configured k2
11	High layer signaling configured k3

TABLE 5

In yet another method for transmitting power control commands, at least one power control command is transmitted in one DCI, each power control command for one UE is called UE-group power control command, and the DCI is for at least one UE. At this time, since the timing relationship between the PDSCH and the HARQ-ACK generated by the PDSCH is dynamically indicated by the DCI in the PDCCH that schedules the PDSCH, and is no longer a determined timing relationship, at this time, the timing relationship between the DCI that transmits the UE-group power control command and the PUCCH that adjusts power using the UE-group power control command does not exist, and therefore, a timing relationship needs to be determined so as to adjust the power of the PUCCH using the UE-group power control command according to the timing relationship.

In this case, the following describes how the UE determines the timing relationship between the UE-group power control command and the PUCCH to which the UE-group power control command is applied to adjust the power. The UE may determine the timing relationship between the UE-group common power control command and the PUCCH transmission to which the power control command is applied by explicit signaling (the explicit signaling includes system information, higher layer signaling, medium access layer signaling, or physical layer signaling, etc.), implicit signaling, and a protocol preset method, that is, the UE-group common power control command is transmitted in slot n-k, the PUCCH to which the power control command is applied is transmitted in slot n, and determining the timing relationship is to determine the k value. Several methods of determining the timing relationship between UE-group common power control commands and the adjusted power PUCCH transmission to which these power control commands are applied are described in detail below.

The method comprises the following steps:

the UE obtains the timing relationship between the UE-group power control commands and the PUCCH transmission to which the power control commands are applied by receiving explicit signaling (e.g., system information, high-layer signaling) sent by the base station, that is, the UE-group power control commands are transmitted in a slot n-k, the PUCCH to which the power control commands are applied is transmitted in the slot n, and the UE obtains the value k by receiving explicit signaling (e.g., system information, high-layer signaling) sent by the base station, where k is an integer greater than or equal to 0. When the value k is configured through high-layer signaling, the value k can be configured through common high-layer signaling or through UE-specific high-layer signaling. The k values may be the same for different UEs in a group, which may make transmission easier in TDD case, as shown in fig. 4, otherwise, it would be inconvenient if the k values are different for different UEs. For example, assuming that UE-group DCI containing power control commands is transmitted in slot n, k value of UE1 is k1, slot n + k1 of UE1 is an uplink slot, PUCCH can be transmitted, k value of UE2 is k2, and slot n + k2 of UE2 is a downlink slot, PUCCH cannot be transmitted, as shown in fig. 5, which may cause inconvenience. The k values may also be different for different UEs in a group, which may allow more flexibility in adjusting power for different needs of different UEs in case of FDD, e.g., UE-group DCI containing power control commands is transmitted in slot n, k value of UE1 is k1, power control command of UE1 may apply power adjustment of PUCCH transmitted in slot n + k1, k value of UE2 is k2, and power control command of UE2 may apply power adjustment of PUCCH transmitted in slot n + k2, as shown in fig. 6.

Or the k value is determined by protocol presets, which are the same for different UEs.

The method is easy to implement, the required signaling overhead is relatively low, but the timing relationship cannot be adjusted flexibly.

The second method comprises the following steps:

a timing relationship exists between the transmission of the UE-group power control commands and the PUCCH transmission to which the power control commands are applied to adjust the power, that is, the UE-group power control commands are transmitted in a slot n-k, the PUCCH to which the power control commands are applied to adjust the power is transmitted in the slot n, the UE obtains a value k through a combination of explicit signaling and physical layer signaling or through physical layer signaling, k is an integer greater than or equal to 0, and the timing relationship is called TPC timing relationship. For example, the UE obtains a set of timing relationships through explicit signaling (e.g., system information, higher layer signaling), for example, the set of timing relationships is { k0, k1, k2, k3}, which is called as a set of TPC timing relationships, and then, through a specific time interval value in the set of physical layer signaling indications, the UE-group TPC timing relationship indication value corresponds to the UE-group power control command and the time interval ki to which the UE-group power control command is applied, as shown in table 6. The method can dynamically adjust the timing relation between the UE-group power control commands and PUCCH transmission which applies the power control commands to adjust power, and can adjust power more timely.

TPC timing relation indication value of UE-group	Time interval ki between a UE-group power control command and an application of the UE-group power control command
		00	k0
01	k1
		10	k2
11	k3

TABLE 6

Several ways of determining the set of timing relationships and indicating a specific time interval value in the set by physical layer signaling are described below.

The first method is as follows:

the set of timing relationships for the UEs transmitting the power control commands in the same UE-group DCI is the same, and the UEs are obtained by explicit signaling (e.g., system information, higher layer signaling), e.g., the set of timing relationships is { k0, k1, k2, k3 }. In addition to transmitting the power control commands of each UE, transmitting a specific UE-group TPC timing relationship indication information in the DCI transmitting the UE-group power control commands, indicating one value in a timing relationship set as a time interval ki between the UE-group power control commands of the UE and the PUCCH to which the UE-group power control commands are applied to adjust power, the timing relationship indication information indicating a time interval value applied to all UEs in the UE-group, that is, indicating a time interval ki between the UE-group power control commands of all UEs in the group and the PUCCH to which the UE-group power control commands are applied to adjust power, as shown in fig. 7, for example, the information in the DCI transmitting the UE-group is {1, TPC2, …, TPC cn, …, TPCn, UE-group timing relationship indication information }, N indicates that the DCI of the UE-group power control commands contains N power control commands, the TPC timing relationship indication information field of the UE-group includes L bits (for example, L is 2), and the correspondence between the TPC timing relationship indication information value of the UE-group and the time interval ki between the UE-group power control command and the PUCCH to which the UE-group power control command is applied to adjust the power is shown in table 6.

The second method comprises the following steps:

the TPC timing relationship sets of different UEs transmitting power control commands in the same UE-group DCI are different, for example, the UE obtains the TPC timing relationship set of the UE through explicit signaling (e.g., higher layer signaling), or the TPC timing relationship set of the UE transmitting power control commands in the UE-group DCI is the same as the HARQ timing relationship set of the UE, for example, the TPC timing relationship set of the UE1 is { k0_1, k1_1, k2_1, k3_1}, and the TPC timing relationship set of the UE2 is { k0_2, k1_2, k2_2, k3_3 }. In addition to transmitting the power control command of each UE, transmitting a specific TPC timing relationship indication information of the UE-group in the DCI transmitting the UE-group power control command, where the TPC timing relationship indication information values of the UE-group are the same for all UEs in the UE-group, but since the timing relationship sets of different UEs are different, the time intervals ki between the UE-group power control command of each UE and the PUCCH to which the UE-group power control command is applied to adjust the power may also be different. The time interval values of different UEs are applied to different UEs, that is, the UE-group power control commands of each UE in the group and the time interval ki to which the UE-group power control commands are applied are indicated, as shown in fig. 8, for example, the information in the transmitted DCI is { TPC1, TPC2, …, TPCn, …, TPCn, and TPC timing relationship indication information of UE-group }, N indicates that the DCI of the UE-group power control commands includes N power control commands, the TPC timing relationship indication information field of UE-group includes 2 bits, and the correspondence between the TPC timing relationship indication information value of UE-group and the time interval ki between the UE-group power control command and the PUCCH to which the UE-group power control command is applied to adjust power is shown in table 7. For example, the TPC timing relationship for UE-group indicated value is 01, and for UE1, the time interval between the UE-group power control command and the PUCCH to which the UE-group power control command is applied to adjust power is k1_ 1; for UE2, the time interval between the UE-group power control command and the PUCCH where the UE-group power control command is applied to adjust the power is k1_ 2.

TPC timing relation indication value of UE-group	Time interval ki of UE1	Time interval ki of UE2	…	Time interval ki of UEN
					00	k0_1	k0_2	k0_N
01	k1_1	k1_2		k1_N
					10	k2_1	k2_2	k2_N
11	k3_1	k3_2		k3_N

TABLE 7

The method can dynamically adjust the time interval between the UE-group power control command and the application of the UE-group power control command, is easy to realize, and requires relatively low signaling overhead.

The third method comprises the following steps:

the TPC timing relationship sets of UEs transmitting power control commands in the same UE-group DCI are different or the same, for example, the UE obtains the TPC timing relationship set of the UE through explicit signaling (e.g., system information, or higher layer signaling), or the TPC timing relationship set of the UEs transmitting power control commands in the UE-group DCI is the same as the HARQ timing relationship set of the UE, for example, the TPC timing relationship set of the UE1 is { k0_1, k1_1, k2_1, k3_1}, and the TPC timing relationship set of the UE2 is { k0_2, k1_2, k2_2, k3_3 }. In addition to transmitting the power control command of each UE, the DCI for transmitting the UE-group power control command also transmits a specific TPC timing relation indication information of the UE-group corresponding to each UE. The TPC timing relationship indication information for different UEs is applied to different UEs, i.e. indicates the time interval ki between the UE-group power control command for that UE and the PUCCH to which the UE-group power control command is applied to adjust the power, as shown in figure 9, for example, the information in the transmitted DCI is { TPC1, TPC timing relationship indication information 1 of UE-group, TPC2, TPC timing relationship indication information 2 of UE-group, …, TPCN, TPC timing relationship indication information N of UE-group }, where N indicates that the DCI of the UE-group power control command includes N power control commands, the TPC timing relationship indication information field of each UE-group includes 2 bits, and the correspondence between the TPC timing relationship indication information value of UE-group and the time interval ki between the UE-group power control command and the PUCCH to which the UE-group power control command is applied to adjust power is shown in table 8.

TPC timing relationship indication value of UE-group of UE1	Time interval ki of UE1
		00	k0_1
01	k1_1
		10	k2_1
11	k3_1

TABLE 8

The method can dynamically adjust the time interval between the UE-group power control command and the application of the UE-group power control command, and respectively determines the TPC timing relation aiming at different UE conditions, and the required signaling overhead is relatively large.

The third method comprises the following steps:

the UE obtains a timing relation between the UE-group power control commands and PUCCH transmission which adjusts power by applying the power control commands by receiving implicit signaling sent by the base station, namely, the UE-group power control commands are transmitted in a time slot n-k, the PUCCH which adjusts power by applying the power control commands is transmitted in the time slot n, the UE obtains a value k by receiving the implicit signaling sent by the base station, and k is an integer which is more than or equal to 0.

For example, assume that a UE has been configured with a set of HARQ timing relationships, and then each UE selects the value of one determined element in the UE's set of HARQ timing relationships as the value of the time interval k between the UE-group power control commands for that UE and the PUCCH transmission to which those power control commands are applied to adjust the power. For example, the time interval k value between the UE's UE-group power control commands and the PUCCH transmission to which they are applied to adjust the power is the minimum value (or the maximum value; or the minimum value, and slot n is the uplink slot; or the maximum value, and slot n is the uplink slot) in the set of HARQ timing relationships. For example, if the HARQ timing relationship set for a UE is {1,2,3,4}, and the minimum value in the HARQ timing relationship set is 1, the time interval between the UE-group power control commands for the UE and the PUCCH transmission to which the power control commands are applied to adjust the power is 1. Or alternatively. For example, the value of the time interval k between the UE-group power control commands of the UE and the PUCCH transmission to which the power control commands are applied to adjust power is the first value in the set of HARQ timing relationships, e.g., the set of HARQ timing relationships of the UE is {1,2,3,4}, and the first value in the set of HARQ timing relationships is 1, then the time interval between the UE-group power control commands of the UE and the PUCCH transmission to which the power control commands are applied to adjust power is 1.

This approach does not require additional physical layer signaling overhead, but does not allow for more flexible adjustment of the timing relationship.

The method of determining the time interval between UE-group power control commands and PUCCH transmission applying these power control commands to adjust power may be applied to determine the time interval between UE-group power control commands and PUSCH transmission applying these power control commands to adjust power, except that the UE-group power control commands for PUCCH are exchanged for UE-group power control commands for PUSCH, PUCCH is exchanged for PUSCH, and the set of HARQ timing relationships that the UE is configured is exchanged for the set of time intervals that the UE is configured to from UL DCI to the DCI scheduled PUSCH.

The method four comprises the following steps:

the UE obtains a timing relationship between UE-group power control commands and PUCCH transmissions for which power control commands are applied to adjust power using a default HARQ timing relationship, which refers to a timing relationship between a PDSCH scheduled by a PDCCH of a common search space and HARQ transmissions of the PDSCH, and may be preset by a protocol or indicated by system information. That is, the PDSCH scheduled by the PDCCH of the common search space is transmitted at time slot n-k, and the HARQ transmission of the PDSCH is transmitted at time slot n, then the UE receives the UE-group power control command at time slot n-k, and the UE applies the UE-group power control command to time slot n.

Example two

In a New Radio (NR) communication system, there are introduced a plurality of PUCCH transmissions in one slot, for example, two time-division multiplexed PUCCH transmissions in one slot n, where the former PUCCH is denoted as PUCCH-1 and the latter PUCCH is denoted as PUCCH-2, as shown in fig. 10. At this time, the timing relationship between the DCI for transmitting the TPC and the uplink UCI transmission for performing power control by applying the TPC is in units of slots, for example, the DCI including the TPC is transmitted in the slot n, and the uplink UCI for performing power control by applying the TPC is transmitted in the slot n + k. The TPC here includes TPC in DCI scheduling PDSCH, and TPC in UE-group common DCI. How to perform power control of a plurality of PUCCHs in one slot at this time has the following methods.

The method comprises the following steps:

when at least two PUCCHs in a time slot are transmitted in a time division multiplexing mode, an accumulated value g (i) of closed-loop power control is calculated for each PUCCH. For example, in one slot i, there are two time-division multiplexed PUCCHs, the former PUCCH is denoted PUCCH-1, the latter PUCCH is denoted PUCCH-2, the accumulated value of closed-loop power control is denoted g _1(i) for PUCCH-1, and the accumulated value of closed-loop power control is denoted g _2(i) for PUCCH-2. Delta_PUCCHIs a power adjustment value obtained from a transmission power control command (TPC command), and g _1(i) and g _2(i) may be according to the formula

And

are calculated respectively, wherein m_iRefer to time slots i-m_iDoes not meet the latency processing requirements.

Specifically, if there are multiple PUCCH transmissions in slot i-1, g (i-1) is equal to the accumulated value of closed-loop power control for the last PUCCH within slot i-1, e.g., there are two time-division multiplexed PUCCH transmissions in one slot i-1, the first PUCCH is designated PUCCH-1, the following PUCCH is designated PUCCH-2, the accumulated value of closed-loop power control is designated g _1(i-1) for PUCCH-1, and the accumulated value of closed-loop power control is designated g _2(i-1) for PUCCH-2, then g (i-1) is equal to g _2 (i-1).

Where M is the total number of power control commands directed to slot i. For example, M is equal to 3, power control commands TPC-0, TPC-1 and TPC-2 are received in the time slots i-k0, i-k1 and i-k2, respectively, and delta is calculated according to the power control commands TPC-0, TPC-1 and TPC-2_PUCCH(i-k0)，δ_PUCCH(i-k1)，δ_PUCCH(i-k2), and m_iRefer to time slots i-m_iDoes not meet the delay processing requirement, the TPC command for this slot cannot be applied to calculate g _1 (i).

For example, as shown in fig. 11, the long PUCCH is denoted as PUCCH-1, the short PUCCH is denoted as PUCCH-2, transmission is performed in slot n, and power control commands TPC-0, TPC-1 and TPC-2 are received in slot n, slot n-1 and slot n-2, respectively. For the power control commands TPC-1 and TPC-2 of the long PUCCH-1, the time slot n-1 and the time slot n-2 to meet the time delay requirement, the power adjustment value delta can be obtained by using the power control commands TPC-1 and TPC-2_PUCCH(n-1)，δ_PUCCH(n-2), and the power control command TPC-0 of slot n is received by the UE, the UE has started to transmit the long PUCCH-1, and thus the power control command TPC-0 of slot n results in the power adjustment value delta_PUCCH(n) cannot be used to calculate the accumulated value g _1(n) of closed-loop power control of PUCCH-1, and therefore, g _1(n) is g (n-1) + δ_PUCCH(n-1)+δ_PUCCH(n-2); for short PUCCH-2The power control commands TPC-0, TPC-1 and TPC-2 of the time slot n, the time slot n-1 and the time slot n-2 meet the time delay requirement, and the power adjustment value delta can be obtained by using the power control commands TPC-0, TPC-1 and TPC-2_PUCCH(n)，δ_PUCCH(n-1)，δ_PUCCH(n-2) and then calculating an accumulated value of the closed loop power control using the power adjustment value, so that g _2(n) is g (n-1) + δ_PUCCH(n)+δ_PUCCH(n-1)+δ_PUCCH(n-2). And g (n) for the accumulated value calculation for closed loop power control for slot n +1 is equal to g _2 (n). The above TPC command may be a TPC command included in DCI in a PDCCH that schedules the PDSCH, or may be a TPC command in UE-group common DCI.

The second method comprises the following steps:

when at least two PUCCHs in one time slot are transmitted in a time division multiplexing mode, the accumulated value g (i) of closed loop power control is uniformly calculated for each PUCCH. For example, in one slot i, there are two time-division multiplexed PUCCHs, the former PUCCH is denoted PUCCH-1, the latter PUCCH is denoted PUCCH-2, and the accumulated values of closed-loop power control are the same for PUCCH-1 and PUCCH-2, denoted g (i). Delta_PUCCHIs a power adjustment value obtained from a transmission power control command (TPC command), g (i) may be according to the formula

And (6) calculating.

In particular, the method comprises the following steps of,

where M is the total number of power control commands directed to slot i, e.g., M equals 3, power control commands TPC-0, TPC-1 and TPC-2 are received at slots i-k0, slots i-k1 and slots i-k2, respectively, and δ is calculated from power control commands TPC-0, TPC-1 and TPC-2, respectively_PUCCH(i-k0)，δ_PUCCH(i-k1)，δ_PUCCH(i-k2), and m_iRefer to time slots i-m_iDoes not meet the delay processing requirement of at least one PUCCH power control, the TPC command for this slot cannot be applied to calculate g (i). For example, as shown in fig. 11, the long PUCCH is PUCCH-1, the short PUCCH is PUCCH-2, and transmission is performed in slot n and slot nn, slot n-1 and slot n-2 receive power control commands TPC-0, TPC-1 and TPC-2, respectively. For the long PUCCH-1, the power control commands TPC-1 and TPC-2 of the time slot n-1 and the time slot n-2 meet the time delay requirement, and the UE starts to transmit the long PUCCH-1 before the power control command TPC-0 of the time slot n is received by the UE, so that the power adjustment value delta obtained by the power control command TPC-0 of the time slot n_PUCCH(n) cannot meet the delay requirement of power control of PUCCH-1; for the power control commands TPC-0, TPC-1 and TPC-2 of short PUCCH-2, time slot n-1 and time slot n-2, the time delay requirement of the power control of the PUCCH-2 is met, namely, only the power control commands TPC-1 and TPC-2 of the time slot n-1 and the time slot n-2 simultaneously meet the time delay requirement of the power control of the PUCCH-1 and PUCCH-2, and the power control command TPC-0 of the time slot n does not meet the time delay requirement of the power control of the PUCCH-1, so the power adjustment value delta obtained by utilizing the TPC-1 and TPC-2_PUCCH(n-1)，δ_PUCCH(n-2) calculating an accumulated value of closed-loop power control, g (n) ═ g (n-1) + δ_PUCCH(n-1)+δ_PUCCH(n-2)。

EXAMPLE III

In a New Radio (NR) communication system, there may be a case where one DCI transmitting a TPC command precedes another DCI transmitting a TPC command, and a PUCCH transmission power-controlled using a previously transmitted TPC command is followed by a PUCCH transmission power-controlled using a later transmitted TPC command. For example, DCI-1 transmitting TPC command TPC-1 is transmitted in slot n-k-l, DCI-2 transmitting TPC command TPC-2 is transmitted in slot n-k, PUCCH-1 applying TPC-1 for power control is transmitted in slot n + p, and PUCCH-2 applying TPC-2 for power control is transmitted in slot n, as shown in FIG. 12.

How to perform power control of the PUCCH at this time is performed by the following methods.

The method comprises the following steps:

for power control of PUCCH transmitted in slot n, slot n-k is used_mTPC commands in transmitted DCI (requirement: calculation of accumulated value of this TPC not applied to previous closed loop power control, slot n-k according to TPC timing relationship)_mApplication of TPC commands in transmitted DCI to power control of PUCCH for slot n transmission) And in time slot n-k_mTPC commands in previously transmitted DCI (requiring calculation of accumulated values for which the TPC was not applied for previous closed loop power control, slot n-k according to TPC timing relationship_mTPC commands in previously transmitted DCI are applied to power control of PUCCH transmitted in slot n + p, p being a positive integer of 1 or more) together.

Specifically, as shown in FIG. 12, DCI-1 for transmitting TPC command TPC-1 is transmitted in slot n-k-l, DCI-2 for transmitting TPC command TPC-2 is transmitted in slot n-k, PUCCH-1 for power control of TPC-1 is transmitted in slot n + p, PUCCH-2 for power control of TPC-2 is transmitted in slot n according to TPC timing relationship, and at this time, the accumulated value of closed loop power control of PUCCH-2 transmitted in slot n utilizes the power adjustment value δ obtained by TPC-1 and TPC-2_PUCCH(1) And delta_PUCCH(2) Is calculated as g (n) ═ g (n-1) + δ_PUCCH(1)+δ_PUCCH(2). Since TPC-2 is a time slot n-k_mThe TPC command in the transmitted DCI is the TPC applied to the power control of the PUCCH transmitted in slot n (which TPC was not applied to the calculation of the accumulated value of the previous closed loop power control), and TPC-1 is the slot n-k_mDCI of previous transmission and in time slot n-k according to TPC timing relation_mThe TPC command in the previously transmitted DCI is the TPC applied to the power control of the PUCCH transmitted after slot n (which was not applied to the calculation of the accumulated value of the previous closed loop power control), so according to the previous method, the power adjustment value δ obtained using TPC-1 and TPC-2_PUCCH(1) And delta_PUCCH(2) An accumulation value for closed loop power control for the calculation slot n is performed. Accumulation value of closed-loop power control of PUCCH-1 transmitted in time slot n + p without using power adjustment value delta obtained by TPC-1_PUCCH(1) A calculation is made that g (n + p) ═ g (n + p-1), since TPC-1 is a time slot n-k_mThe TPC command in the previously transmitted DCI is applied to the TPC for power control of PUCCH-1 transmitted in slot n + p, but the TPC-1 was once applied to the calculation of the accumulated value for previous PUCCH-2 closed-loop power control, and therefore, the TPC-1 is no longer applied to the calculation of the accumulated value for PUCCH-1 closed-loop power control.

In this way, the calculation of the base station transmission power control command is performed according to time sequence, i.e. the calculation of the TPC-2 is performed on the basis of the TPC-1, and therefore, the PUCCH-2 should perform power control by using the TPC-1 and the TPC-2.

The TPC timing relationship referred to above refers to a timing relationship between DCI transmitting a TPC command and PUCCH to which the TPC command is applied for power control. For example, DCI including a TPC command is transmitted in slot n-k, a PUCCH for power control using the TPC command is transmitted in slot n, and a time correspondence between the PUCCH and the DCI is referred to as a TPC timing relationship.

The second method comprises the following steps:

for power control of PUCCH transmitted in slot n, at slot n-k_mDCI transmitted and time slot n-k according to TPC timing relationship_mThe TPC commands in the transmitted DCI are TPC applied to power control of PUCCH transmitted in slot n, the calculation of the accumulated value of PUCCH closed-loop power control is based on slot n-k_mTPC in the transmitted DCI. Specifically, as shown in fig. 12, DCI-1 for transmitting TPC command TPC-1 is transmitted in slot n-k-l, DCI-2 for transmitting TPC command TPC-2 is transmitted in slot n-k, according to the TPC timing relationship, PUCCH-1 for power control by TPC-1 is transmitted in slot n + p, PUCCH-2 for power control by TPC-2 is transmitted in slot n, and PUCCH-1 calculates the accumulated value of closed-loop power control by using TPC-1 transmitted in slot n-k-l by DCI-1; PUCCH-2 calculates the accumulated value of closed loop power control using the TPC-2 transmitted by DCI-2 in slot n-k.

Example two

In a New Radio (NR) communication system, there are introduced a plurality of PUCCH transmissions in one slot, for example, two time-division multiplexed PUCCH transmissions in one slot n, where the former PUCCH is denoted as PUCCH-1 and the latter PUCCH is denoted as PUCCH-2. At this time, the timing relationship between the DCI for transmitting the TPC and the uplink UCI transmission for performing power control by applying the TPC is in units of slots, for example, the DCI including the TPC is transmitted in the slot n, and the uplink UCI for performing power control by applying the TPC is transmitted in the slot n + k.

For the TPC in the UE-group common DCI, when the UE-group common DCI including the TPC is transmitted in the slot n, the TPC is transmitted in the slot n + k for power control, and there are multiple PUCCH transmissions in the slot n + k, the TPC command is applied to the power control of the first PUCCH in the slot n + k in front and back order, for example, there are two time-division multiplexed PUCCH transmissions in the slot n + k, the former PUCCH is denoted as PUCCH-1, the latter PUCCH is denoted as PUCCH-2, and as shown in fig. 10, the TPC command is applied to the power control of PUCCH-1.

For example, when the DCI for scheduling PDSCH includes TPC in slot n, the HARQ-ACK for PDSCH is transmitted in slot n + k by PUCCH, and the TPC included in the DCI for scheduling PDSCH performs power control on PUCCH for transmitting the HARQ-ACK for PDSCH, for example, there are two time-division multiplexed PUCCH transmissions in slot n + k, the former PUCCH is denoted as PUCCH-1 and the latter PUCCH is denoted as PUCCH-2, as shown in fig. 10, the HARQ-ACK for PDSCH is transmitted in PUCCH-2, and the TPC command is applied to power control of PUCCH-2.

Corresponding to the above method, the present application also discloses an uplink power control device, whose preferred structure is shown in fig. 13, including: a timing relationship determination module and a power control module, wherein:

the timing relation determining module is used for determining the timing relation between the power control command and an uplink control channel for performing power control by applying the power control command;

and the power control module is used for adjusting the transmission power of the corresponding uplink control channel according to the determined timing relation and the power control command.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A method performed by a terminal in a wireless communication system, the method comprising:

receiving, via higher layer signaling, configuration information including information on a plurality of time interval values from a base station, the time interval values indicating a time interval between downlink control information, DCI, and a physical uplink shared channel, PUSCH, scheduled by the DCI;

determining a transmission power of the PUSCH transmission based on a TPC command value determined from among Transmission Power Control (TPC) command values included in DCI received from the base station according to a minimum value of the plurality of time interval values; and

performing the PUSCH transmission based on the transmission power.

2. The method of claim 1, wherein the first and second light sources are selected from the group consisting of,

wherein the determined TPC command value is received prior to a first time that is prior to the PUSCH transmission and that is determined based on a minimum of the plurality of time interval values.

3. The method according to claim 1 or 2,

wherein the transmission power is determined based on a sum of TPC command values received within a duration that are not used by PUSCH transmissions preceding the PUSCH transmission.

4. A terminal in a wireless communication system, the terminal comprising:

a transceiver; and

a controller coupled with the transceiver and configured to:

performing the PUSCH transmission based on the transmission power.

5. The terminal of claim 4, wherein the determined TPC command value is received before a first time, the first time being before the PUSCH transmission and being determined based on a minimum of the plurality of time interval values.

6. The terminal according to claim 4 or 5,

7. A base station in a wireless communication system, the base station comprising:

a transceiver; and

a controller coupled with the transceiver and configured to:

transmitting configuration information including information on a plurality of time interval values indicating a time interval between downlink control information, DCI, and a physical uplink shared channel, PUSCH, scheduled by the DCI to a terminal via higher layer signaling;

receiving, via the transceiver, a PUSCH transmission from a terminal, a transmission power of the PUSCH transmission being determined based on a TPC command value determined from among Transmission Power Control (TPC) command values included in DCI transmitted by a base station to the terminal according to a minimum value of the plurality of time interval values.

8. The base station of claim 7, wherein the determined TPC command value is received by the terminal prior to a first time that is prior to the PUSCH transmission and that is determined based on a minimum of the plurality of time interval values.

9. The base station according to claim 7 or 8, wherein the transmission power is determined based on a sum of TPC command values received by the terminal within a time duration that are not used by a PUSCH transmission preceding the PUSCH transmission.

10. A method performed by a base station in a wireless communication system, the method comprising:

transmitting configuration information including information on a plurality of time interval values indicating a time interval between downlink control information, DCI, and a physical uplink shared channel, PUSCH, scheduled by the DCI to a terminal via higher layer signaling; and

receiving a PUSCH transmission from the terminal, a transmission power of the PUSCH transmission being determined based on a TPC command value determined from among Transmission Power Control (TPC) command values included in DCI transmitted by the base station to the terminal according to a minimum value of the plurality of time interval values.

11. The method of claim 10, wherein the determined TPC command value is received by the terminal prior to a first time, the first time being prior to the PUSCH transmission and determined based on a minimum of the plurality of time interval values.

12. The method of claim 10 or 11, wherein the transmission power is determined based on a sum of TPC command values received by a terminal within a time duration that are not used by a PUSCH transmission preceding the PUSCH transmission.