WO2012041094A1

WO2012041094A1 - Physical uplink control channel power setting method and user equipment

Info

Publication number: WO2012041094A1
Application number: PCT/CN2011/076549
Authority: WO
Inventors: 朱鹏; 喻斌; 戴博; 杨维维; 梁春丽
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-09-30
Filing date: 2011-06-29
Publication date: 2012-04-05
Also published as: CN101969685A; CN101969685B

Abstract

The invention discloses a Physical Uplink Control Channel (PUCCH) power setting method and a user equipment, wherein the user equipment includes a power reference value acquisition unit, a power offset determination unit and a power setting unit. Wherein the power reference value acquisition unit is set to calculate and to acquire the power reference value P _PUCCH,ref of the PUCCH reference format, and to output the acquired P _PUCCH,ref to the power offset determination unit. The power offset determination unit is set to determine the power offset ΔP _PUCCH of the PUCCH format 3 based on the input, and to request the sum of the P _PUCCH,ref and the ΔP _PUCCH and output the sum to the power setting unit. The power setting unit is set to set the transmission power of the PUCCH according to the input sum of the P _PUCCH,ref and the ΔP _PUCCH. The invention ensures reliable transmission of the uplink control information of the PUCCH.

Description

Power setting method and user equipment for physical uplink control channel

TECHNICAL FIELD The present invention relates to a power control technology for a mobile communication system, and more particularly to a power setting method for a physical uplink control channel and a user equipment.

Background technique

In the Long Term Evolution (LTE) system of the 3rd Generation Partnership Project (3GPP), uplink power control (uplink power control) is used to control the uplink physical channel ( Uplink Physical Channel) transmit power to compensate for channel path loss and shadow fading and to suppress inter-cell interference. The uplink physical channel of the uplink power control control includes a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a sounding reference signal (SRS). On the LTE system, the power control uses a combination of an open loop and a closed loop. In the LTE system, the transmit power of the PUCCH of the User Equipment (UE) on the i-th subframe (subframe I) is defined by the following formula (1) (in dBm):

^PUCCH (0 ^{— m} ^ ⁿ {^ CMAX ' ^ 0 PUCCH ^{+ +} PUCCH ( ^ ) ⁺ ^ ( ^? )} ( 1 ) In equation (1 ), each parameter represents: (1) P _CMAX is the UE setting UE maximum configured output power (the Configured Maximum

The value of the UE output power is determined by a plurality of parameters, including: the maximum UE power determined by the UE power class, and the maximum configured power of the system (IE P- Max), maximum configuration output power deviation (PCMAX tolerance), maximum power reduction (MPR), and maximum power reduction (A-MPR).

(2) P. _PUCCH is an open loop power control parameter, which is a cell specific corpse. _N. Figure AL PUCCH and a UE specific (UE specific) amount p. ^ The sum of _PUCCH . (3) "P is the Downlink Pathloss Estimate measured and calculated by the UE;

(4) Δ _{Ρ PUCCH} ( ) is a power offset associated with PUCCH format F ( PUCCH format( )). In the LTE system, six PUCCH formats are defined, which are respectively PUCCH format l/la/lb/2/2a/2b. The power offset A _{F PUCCH} ( ) is based on the PUCCH format la (the power offset of the reference format) Set to 0) defined and configured by the upper layer, as shown in Table 1. Table 1

(5) h{n) is a value based on the PUCCH format F, where " _ce is the number of information bits of the Channel Quality Indicator (CQI), and n is the Hybrid Automatic Repeat Request (HARQ). The number of HARQ bits. For PUCCH format 1/1 a/lb , iCQI , ⁿ HARQ ) PUCCH format 2/2a/2b for Normal Cyclic Prefix (Normal CP ),

Otherwise PUCCH format for extended Cyclic Prefix (Extended Cyc)

(6) The current PUCCH power control adjustment state is called PUCCH, as shown in the following equation:

M-\

g(0 = g -l)+∑ ^PUCCH - K )

In the case of m=0, for a Frequency Division Duplex (FDD) system, M=l, = 4. That is, for the FDD system, the power control adjustment state (ie, the current power control adjustment state) of the PUCCH on the subframe ι is the power control adjustment state on the subframe il and the transmission power control command indicated by the base station on the subframe Z-4 (Transmit) Power Control command, TPC command ) ^ Cumulative value of _PUCCH . For Time Division Duplex (TDD) systems, the values of M and ^ are related to the system's uplink-downlink configurations. That is, for the TDD system, the power control adjustment state (ie, the current power control adjustment state) of the PUCCH on the subframe I is the power control adjustment state on the subframe Z-1 and the subframe /_···, /-^^ The cumulative value of the _sum of the plurality of transmit power control commands ^> _UCCH indicated by the base station. For the TDD system, if subframe I is not an uplink subframe, g(/) = g(/- 1). The transmit power control command _PUCCH is a UE-specific (UE specific) closed-loop correction value, and is sent by the base station to the target UE through a Physical Downlink Control Channel (PDCCH).

If the UE does not detect the TPC command on a certain subframe, then _{PU (H} = 0 dB.

The PUCCH is used to carry Uplink Control Information (UCI), and the UCI includes a Scheduling Request (SR) and a Hybrid Automatic Repeat Request (HARQ) response message of the Physical Downlink Shared Channel (PDSCH). , including: acknowledgement (ACK) response or nonacknowledgment (NACK) response, and downlink channel state information fed back by the UE (Channel State Information, CSI). Among them, CSI includes three forms: Channel Quality Indication (CQI), Precoding Matrix Indicator (PMI) and Rank Indication (RI).

The LTE-Advanced (LTE-A) system is the next-generation evolution system of the LTE system. As shown in Figure 1, the LTE-A system uses carrier aggregation technology to extend the transmission bandwidth. Each aggregated carrier is called a Component Carrier (CC), also known as a "cell". Cell ). Multiple component carriers may be contiguous or non-contiguous; they may be in the same frequency band or in different frequency bands. The prior art proposes that in an LTE-A system, a user equipment can simultaneously receive multiple PDSCHs on multiple configured or activated component carriers. The multiple ACK/NACK of the PDSCH is transmitted on one UE-specific (UE specific) component carrier through a PUCCH. The UE-specific component carrier is called a Primary Component Carrier (PCC), and is also called a Primary Cell (Pcell).

For the LTE-A system, the ΜΛΧ in the equation (1) is the configured UE transmitted power for the primary cell. To carry the ACK/NACK response information of multiple PDSCHs, a new PUCCH format, called PUCCH format 3 (also referred to as the third PUCCH format), is introduced in the LTE-A system. Currently, the LTE-A system aggregates up to 5 component carriers. If the UE needs to feed back ACK/NACK for each PDSCH, l~2 bits (each PDSCH can carry 1~2 Transport Blocks (TB), each transport block. Need to feedback lbit ACK/NACK), PUCCH format 3 ACK/NACK to be carried is l~10bits. In addition, if the PUCCH format 3 further includes the lbit scheduling request information SR, the amount of information to be carried by the PUCCH format 3 is l~l lbits. Whether the user equipment uses PUCCH format 3 to send uplink control information is configured by a higher layer. PUCCH format 3 and PUCCH format l/la/lb/2/2a/2b can carry different amounts of information, different coding modes, and different channel structures and channelization modes. For example, before generating a Single Carrier-Frequency Division Multiple Access (SC-FDMA) signal in the time domain, unlike PUCCH format l/la/lb/2/2a/2b, PUCCH format 3 is also performed. Transmission pre The encoding (transformation precoding), and thus the SC-FDMA signal generated by the PUCCH format 3 is also referred to as a Discrete Fourier Transform-Spread-OFDM (DFT-S-OFDM) signal based on Fourier transform extension. The foregoing description inevitably results in different bit error rate performance of the PUCCH format 3, which requires the UE to transmit different power to the PUCCH. Therefore, when the user equipment sends the uplink control information by using the PUCCH format 3, how to set the transmit power of the physical uplink control channel becomes an urgent problem to be solved.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for setting a power of a physical uplink control channel and a user equipment to solve the problem that the prior art cannot set a corresponding transmission power for a third physical uplink control channel format. In order to solve the above technical problem, the present invention provides a method for setting a power of a physical uplink control channel, where the method includes: the uplink control information sent by the user equipment for using the third physical uplink control channel format, according to the physical uplink control channel reference. The power offset of the format determines the power offset of the third physical uplink control channel format, and sets the transmit power of the physical uplink control channel. In the above method,

The physical uplink control channel reference format includes any one of a first physical uplink control channel format, a second physical uplink control channel format, and a third physical uplink control channel format, where: the first physical uplink control channel format includes Physical uplink control channel format 1, physical uplink control channel format la, and physical uplink control channel format lb;

The second physical uplink control channel format includes a physical uplink control channel format, a physical uplink control channel format 2a, and a physical uplink control channel format 2b. In the above method, the power reference quantity of the physical uplink control channel reference format is that the physical uplink control channel format la is a power reference quantity of the physical uplink control channel reference format.

^CCH,. ' Calculated according to the following formula:

^ PUCCH, ref 0) - ^ O PUCCH + PL + g{t), In the formula,

Said P. – _PUOTI is an open loop power control parameter equal to the cell specific amount P. — _N . _{MNAL PUOTI} and user equipment specific amount P. ― _PueeH sum; the P is a downlink path loss estimate measured and calculated by the user equipment to the serving cell, where the serving cell is configured by a higher layer; or the downlink path loss estimate measured and calculated by the user equipment to the primary cell The downlink path loss estimation unit is dB; and the g (0 is a current power control adjustment state of the physical uplink control channel;

The power offset of the third physical uplink control channel format determined by the power reference quantity based on the physical uplink control channel reference format, including a fixed one, is obtained by calculating the obtained Ρ _υ Offset _PUCCH (F) and/or a variable offset // («); wherein: the fixed offset Δ _Ρ — _pueeH (F) is a default value, a configuration value, and is carried from the physical uplink control channel The uplink control information amount related to the plurality of fixed offset values Δ _Ρ — the _PUCCH (F) set determines a corresponding one of the fixed offset values A _{F pueeH} ; the variable offset is configured by the high-level configuration The manner of the table is determined, or determined by a function of the amount of information n of the uplink control information that is carried by the physical uplink control channel. In the foregoing method, the information about the amount of uplink control information carried by the physical uplink control channel is related to Determining a corresponding fixed offset value in a plurality of fixed offset values A _F — _PUOTI (F) set

^{The A} F_PUCCH includes: according to the information quantity carried by the third physical uplink control channel format, “two or more sets of power offset values Δ _Ρ — _PUCCH (in association with a threshold value or a plurality of threshold values) F) the user equipment determines, according to the information quantity n carried by the third physical uplink control channel format, a corresponding set of power offset values A _F — _PU∞H (F), and sets the group Power offset value

A _F - _PUCCH (F) set is reported to the upper layer; and the upper layer configures a fixed offset value in the set of power offset values A _F - _PUCCH (F) to be reported as the corresponding fixed offset. In the above method, the power reference quantity of the physical uplink control channel reference format is that the third physical uplink control channel format is a power reference quantity of the physical uplink control channel reference format.

^CCH,. ' Calculated according to the following formula:

^ PUCCH, ref 0) - ^ O PUCCH + PL + ), where,

Said P. – _PUOTI is an open loop power control parameter equal to the cell specific amount P. — _N . _{MNAL PUOTI} and user equipment specific amount P. ― _PueeH sum; the P is a downlink path loss estimate measured and calculated by the user equipment to the serving cell, where the serving cell is configured by a higher layer; or the downlink path loss estimate measured and calculated by the user equipment to the primary cell The downlink path loss estimation unit is dB; the g (0 is a current power control adjustment state of the physical uplink control channel;

The unit of calculation is obtained in dBm. In the above method, the power offset of the third physical uplink control channel format determined by the power reference quantity of the physical uplink control channel reference format includes a variable offset, and the variable offset is configured by the high layer through the lookup table. The manner is determined, or determined by a function of the amount of information that depends on the physical uplink control channel carrying the uplink control information. In the above method, the variable offset is determined by a function that depends on an amount of information that the physical uplink control channel carries uplink control information, and the function includes any one of the following functions: if n≥k

The first:

Otherwise, the k is any one of 2, 4, 6, 8 and 10;

n HARQ

Second: 101og _{10 | k} if _HARQ ≥k

h(n = h{n ^l HARQ >

In the formula, the / is the number of information bits indicated by the channel quality, and the ^ is the number of information bits of the hybrid automatic repeat request; ⁿ sR + ⁿ HARQ

10 log. if n _SR + n legs Q ≥ k Third: h(n") = h{ _SR , _nHARQ "j = k

0 otherwise,

The number of information bits of the hybrid automatic repeat request is the number of information bits of the scheduling request. Before the step of setting the transmit power of the physical uplink control channel, the method further includes: determining a maximum transmit power P _CMA3⁄4 configured on the primary cell; and setting a transmit power of the physical uplink control channel, the user equipment according to the next step Extracting the transmit power of the physical uplink control channel, and then performing the setting:

^ PUCCH (0 ^{— m} i ⁿ {^ MAX,c,[ PUCCH,ref + ^ PUCCH ]}; where,

Determining, by the user equipment, a maximum transmit power value configured on the primary cell, in units of dBm;

The _{Ρρυα3⁄4} is a power reference quantity of the physical uplink control channel reference format, and the unit is dBm;

The AP _PUCCH is a power offset of a third physical uplink control channel format based on a power reference quantity of a physical uplink control channel reference format, where the unit is dBm; and the min{ } is a minimum value calculation symbol;

The _{Ρρυ(:(: Η} W is the obtained transmit power value of the physical uplink control channel, and the unit is dBm. To solve the above technical problem, the present invention further provides a user equipment, where the user equipment includes a power reference quantity acquisition unit, a power offset determination unit, and a power setting unit, wherein: the power reference quantity acquisition unit is configured to: calculate a power reference quantity _{Ppu (xHref) of the} physical uplink control channel reference format, and acquire the /^^ output to the power offset determination single L; The power offset determining unit is configured to: determine a power offset AP _{PUCCH of} the third physical uplink control channel format based on the input P _pua3⁄4ref , and obtain the P _{pU (XH ref} and the ^^^ And output to the power setting unit;

The power setting unit is configured to: set a transmit power of the physical uplink control channel according to the _{sum of the} input P _pua3⁄4ref and the AP _PUCCH . In the foregoing user equipment, the physical uplink control channel reference format includes any one of a first physical uplink control channel format, a second physical uplink control channel format, and a third physical uplink control channel format; the first physical uplink control The channel format includes a physical uplink control channel format 1, a physical uplink control channel format la, and a physical uplink control channel format lb; and the second physical uplink control channel format includes a physical uplink control channel format 2, a physical uplink control channel format 2a, and a physical Upstream control channel format 2b. In the above user equipment, the power reference quantity obtaining unit is configured to calculate a power reference quantity p _{pU (XH ref} : the physical uplink control channel format la is the physical uplink) The power reference quantity P _{pua3⁄4ref of the} control channel reference format is calculated according to the following formula to obtain the power reference quantity P _{puecH ref of the} physical uplink control channel reference format:

^ PUCCH, ref 0) - ^ O PUCCH + PL + ), where,

Said P. – _PUOTI is an open loop power control parameter equal to the cell specific amount P. — _N . _{MNAL PUOTI} and user equipment specific amount P. ― _PueeH sum; is the downlink path loss estimate measured and calculated by the user equipment to the serving cell; or the downlink path loss estimate measured and calculated by the user equipment to the primary cell; the downlink path loss estimation unit is dB; G (0 is the current power control adjustment state of the physical uplink control channel;

Calculating the obtained P _{pU (} the unit of _{XH ref} is dBm. In the above user equipment, the power offset determining unit determines the third based on the input P _pua3⁄4ref The power offset AP _{pueeH of the} physical uplink control channel format includes: a fixed offset _pueeH (F) and/or a variable offset / wherein: the fixed offset Δ _Ρ - _pueeH (F) is a default value, a configuration value And determining, according to a plurality of fixed offset values Δ _Ρ — _PUCCH (F) set related to the amount of uplink control information information carried by the physical uplink control channel, a corresponding one of the fixed offset sets;

The variable offset /^«;) is determined by means of a look-up table, or by a function of the amount n of information that carries uplink control information depending on the physical uplink control channel. In the above user equipment, the power reference quantity obtaining unit is configured to calculate a power reference quantity P _{PU (XH ref} : the third physical uplink control channel format is the physical medium) The power reference quantity P _{pua3⁄4ref of the} uplink control channel reference format is used to calculate the power reference quantity P _{pueCT ref of the} physical uplink control channel reference format according to the following formula:

^ PUCCH, ref 0) - ^ O PUCCH + PL + ), where,

Said P. – _PUOTI is an open loop power control parameter equal to the cell specific amount P. — _N . _{MNAL PUOTI} and user equipment specific amount P. ― _PueeH sum; the P is a downlink path loss estimate measured and calculated by the user equipment to the serving cell, or the PL is a downlink path loss estimate measured and calculated by the user equipment to the primary cell; the downlink path loss estimation unit is dB; and the g (0 is the current power control adjustment state of the physical uplink control channel;

Obtaining the calculated P _{pU (XH ref} is given in dBm for the user equipment, the power offset _AP pueeH bias power determining unit determines based on the input _P pua¾ref third physical uplink control channel format comprising: a Variablely biasing the variable offset/determined by means of table lookup, or determined by a function depending on the amount of information of the physical uplink control channel carrying uplink control information n. In the user equipment, the power offset The determining unit is further configured to: determine the variable offset h(n) by a function of an amount of information that depends on the physical uplink control channel carrying uplink control information, the function including any one of the following functions: The first one: /?(") =

0 otherwise, where any value of k 2 , 4 , 6 , 8 , 10 is if _HARQ ≥ k

Otherwise, in the formula. , the number of information bits indicated for the channel quality, the ^ HAR _R . Q is the number of information bits of the hybrid automatic repeat request;

nsR + ⁿ HARQ

10 log. if n _SR + n legs Q ≥ k Third: /?(") = /?( k

0 otherwise,

The number of information bits of the hybrid automatic repeat request is the number of information bits of the scheduling request. The user equipment further includes a primary cell maximum power configuration unit, where: the primary cell maximum power configuration unit is configured to: determine a maximum transmit power MAX configured on the primary cell, and output the power to the power setting unit;

The power setting unit is set to be input as described. And P _{PU (} the minimum value of _{XH ref} and sum as the transmit power setting of the physical uplink control channel.

The present invention can provide multiple schemes for setting the physical uplink control channel transmission power for the PUCCH format 3 when the user equipment uses the PUCCH format 3 to send the uplink control information, thereby ensuring reliable transmission of the uplink control information of the physical uplink control channel.

1 is a schematic diagram of carrier aggregation of an LTE-A system in the prior art; FIG. 2 is a flowchart of a power setting method of a physical uplink control channel according to an embodiment of the present invention; FIG. 3 is a structural block diagram of a user equipment for setting a PUCCH transmission power for a third PUCCH format according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following exemplified embodiments are only intended to illustrate and explain the present invention, and do not constitute a limitation of the technical solutions of the present invention. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other. The power setting method of the physical uplink control channel provided by the embodiment of the present invention includes:

And the user equipment uses, according to the uplink control information sent by using the third physical uplink control channel format, the power offset of the third physical uplink control channel format determined according to the power reference quantity of the physical uplink control channel reference format, and sets the physical uplink control channel. Transmit power.

In the method of this embodiment, the physical uplink control channel (PUCCH) reference format includes: PUCCH format la, any other PUCCH format listed in Table 1, and any one of the third physical uplink control channel format (PUCCH format 3) The PUCCH reference format is any one of PUCCH format 1 a and other PUCCH format (F) that bears fixed 1-bit or 2-bit uplink control information, or carries 1-bit or 2-bit uplink control information. PUCCH format 3.

In the method of this embodiment, the power reference quantity P _pua3⁄4ref ( ) of the PUCCH reference format is calculated and obtained by the following formula (2) (in dBm):

(2) In equation (2),

^0_PUCCH is an open loop power control parameter, which is the sum of the parameter ^o_NO _M NAL_PUCCH and the parameter ^0_UE_PUCCH;

PL is the downlink path loss estimate measured and calculated by the user equipment (UE);

Adjust the state for the current power control of the PUCCH. In the method of this embodiment, the third determined by the power reference quantity of the PUCCH reference format Power offset ( _PUCCH ) of PUCCH format, including a fixed offset (A _F - _PUCCH (F), also called absolute offset) and / or a variable bias is also called relative bias); A _F — _PUCCH (F) is a default value, a value configured by a higher layer, and any one of a plurality of value sets related to an amount of uplink control information information carried by the PUCCH; / ^«;) is determined by the high-level configuration by looking up the table, or by a function depending on the amount of information of the PUCCH carrying the uplink control information. In the method of this embodiment, the transmission power of the PUCCH is obtained by the following formula (3) (in dBm): PUCCH (0 ^- {^CMAX,c, t^PUCCH, ref + ^ PUCCH ]} ( 3 ) 3),

P _CMAX . The configured UE transmitted power for the primary cell value, in units of dBm, configured by the UE on the primary cell (primary component carrier);

P _PU o _ref is a power reference quantity value of the physical uplink control channel reference format given by the formula ( ² ), and the unit is dBm;

_{ΔΡ ρυα Η} is the power offset value of the third PUCCH format based on the power reference amount of the PUCCH reference format, and the unit is dBm; min{ } is the minimum value calculation symbol;

P _PU « _H W is the calculated transmit power value of the acquired PUCCH in dBm.

Embodiment 1

In the LTE-A system, when the user equipment transmits the physical uplink control channel PUCCH in the format of the PUCCH format 3 in the subframe, the acquisition and setting of the transmission power is calculated according to the formula (3). The flow of this embodiment is shown in FIG. 2 . Including the following steps:

210: Determine a maximum transmit power P _CMA3⁄4 configured by the UE on the primary cell; 220: calculate a power reference quantity P _{pU (XH ref} ; of the PUCCH reference format).

The PUCCH reference format is selected as PUCCH format la; calculated according to the above formula (2). Where PL = PL _c is the downlink path loss estimate measured and calculated by the UE to the serving cell, and the unit is decibel (dB); wherein the serving cell is configured by a higher layer; or, is the UE to the primary cell (primary component) Carrier) The measured and calculated downlink path loss estimate in decibels (dB).

230: Determine the power offset 'A-"P PUCCH · ' of PUCCH format 3 based on the calculated power reference amount

In this embodiment, AP _PUCCH = A _F - _PUCCH (F), that is, the variable offset / is 0.

A _{F PUCCH} (F) is defined relative to format la, which can be configured by a higher layer, for example, the high layer signaling of A _{F PUCCH} ( ) is 2 bits. Alternatively, the power offset is related to the information amount of the uplink control information carried by the PUCCH.

The LTE-A system presets a plurality of value sets of A _F — _PUCCH (F) according to the information amount of the uplink control information carried by the PUCCH format 3, and respectively corresponds to different information amount ranges. Setting the transmit power of the PUCCH for PUCCH format 3, the UE according to the PUCCH format

The amount of information carried by the 3 determines the corresponding set of values of A _F — _PUCCH (F), and then one of the higher layers configures one of the values as a power offset. For example, the LTE-A system presets two sets of power offset values according to whether the information amount M carried by the PUCCH format 3 is greater than a threshold value k (bits), as shown in Table 2, and assumes 2, 4, 6, and 8 , any of the values of 10.

Table 2

Alternatively, the LTE-A system presets three sets of power offset values according to different ranges in which the information amount M carried by the PUCCH format 3 is located. table 3

Where ki is set to any two of 2, 4, 6, 8, 10, 12, 14, 16 respectively;

The UE determines a set of values of the corresponding Δ _{Ρ PUCCH} (F) from a preset set of multiple sets of power offset values, and reports the set of values to the upper layer, and the upper layer selects a value from the set of values. For the final determined power offset.

240: Calculate the transmit power of the PUCCH according to the maximum transmit power configured by the UE on the primary cell and the power offset of the PUCCH format 3 based on the power reference amount of the PUCCH reference format.

^PUCCH ( °

P _PUCCH (according to equation ( ³ ) above.

Embodiment 2

In the LTE-A system, when the user equipment UE transmits the physical uplink control channel PUCCH in the format of the PUCCH format 3 on the subframe z, the transmission power is obtained and set according to the formula (3). The flow of this embodiment is shown in FIG. 2 . The only difference from the first embodiment is the step 230. Determine the power offset of PUCCH format 3 — AF—PUCCH ( ) based on the calculated power reference.

The A _{F PUCCH} (F) is still defined with respect to the format la, that is, the A _{F PUCCH} (F) in this embodiment still uses the PUCCH format la as the PUCCH reference format, which is configured by the upper layer, and its value set is as shown in the table. As shown in FIG. 4, the high layer signaling for configuring the ^^^^) is 2 bits. The PUCCH format 3 is a value related to the amount of information about the uplink control information carried by the UE. The related variable variable offset, that is, the function of the information quantity, the value that the UE can determine by means of table lookup; or, the UE according to The value calculated by the formula (4), and the formula (5) or the formula (6). Table 4

,

lOlog ifn≥k

[n = (4) 0 otherwise when Α = 2, h(n) =

0 otherwise when t = 4, h(n) =

0 otherwise or,

Kn) = (n _HARQ

0 otherwise where " _ce is the number of information bits of the channel quality indicator (CQI), "leak." The number of information bits for the hybrid automatic repeat request (HARQ). When ^{if n} HARQ ≥ ²

Α = 2, h(n HARQ/

0 otherwise When t = 4, [n ^l HARQ

0 otherwise

or, ⁿ sR + ⁿ HARQ

10 log. if n _SR + n legs Q ≥ k

h(n) = h[n _SR ,n ^l HARQ k (6)

0 otherwise nSR + ⁿ HARQ

10 log ifn _SR + n _HARg ≥2

When = 2, (n _SR , n _HARg ) =

0 otherwise

^N SR + ^N HARQ

10 log iin _SR +n _HARQ ≥4

When t = 4, h[n _SR , n HARQ) 4

0 otherwise

Embodiment 3

In the LTE-A system, when the user equipment UE transmits the physical uplink control channel PUCCH in the format of the PUCCH format 3 on the subframe z, the transmission power is obtained and set according to the formula (3). The flow of this embodiment is shown in FIG. 2 . The difference from the first two embodiments lies in step 220 and step 230. Step 220: Calculate the obtained power reference quantity by using PUCCH format 3 as the PUCCH reference format.

¹ PUCCH.ref, step 230, determining the power offset of the PUCCH format 3 based on the calculated power reference quantity _{ΔΡ ρυαΗ} = /^; (ie, fixed offset A _F - _PUOTI (F) =0. Where, for PUCCH The format 3 is a function of the amount of information about the uplink control information carried by the UE, the power variable offset, that is, the amount of information, and the value that the UE can determine by means of a table lookup; or, the UE according to the formula (4) The values calculated by Equation (5) or (6) are not described here.

In the above method embodiment,

Number of information bits in the uplink control information is information n hybrid automatic repeat request, i.e., n = n _{the HARQ,} or the "number of information bits for the channel quality indication (CQI) of" _CE, i.e. "= Alternatively, the uplink control the amount of information Π is the number of mixed automatic retransmission request bits. The number of requests bits is " = " leak. +/1⁄2. For example, if a UE currently uses the PUCCH format 3 to send a 4-bit ACK/NACK and sends a 1-bit scheduling request, the amount of information carried by the PUCCH is 4+1 = 5 bits. For example, if a UE currently uses the PUCCH format 3 to send 6 bits of ACK/NACK, the amount of information carried by the PUCCH is 6 bits. For the FDD system, if the UE sends uplink control information in the format of PUCCH format 3 on the subframe i, the ACK/NACK response information of the hybrid automatic repeat request HARQ carried by the UE is received on the subframe 1-4. To the PDSCH. For the TDD system, if the UE transmits uplink control information in the format of PUCCH format 3 on the subframe i, the ACK/NACK response information of the hybrid automatic repeat request HARQ carried by the UE is in the subframe ik for the UE. , ik ', ik _M —\ received PDSCH; where, and M are determined by the Uplink-downlink configurations of the TDD system, as shown in Table 5.

Wherein, the number of hybrid automatic retransmission request bits is calculated as follows:

In equation (7),

^ is the maximum number of transport blocks that the UE can carry on the PDSCH transmitted on the component carrier c, which is Determined by the downlink transmission mode of the component carrier, the downlink transmission mode of the component carrier is configured by a higher layer;

C is a configured component carrier set or an activated component carrier set of the UE. For example, if the downlink transmission mode of the component carrier is a single antenna transmission mode, the maximum number of transmission blocks that the UE can transmit on the component carrier is ^=1; if the downlink transmission mode of the component carrier is the multi-antenna transmission mode, the UE The maximum number of transport blocks that can be carried by the PDSCH transmitted on the component carrier ζ _ε = 2 For example, in the FDD system, a certain UE is currently configured or activated with three downlink component carriers.

The downlink transmission mode of the three downlink component carriers is a single antenna transmission mode, and the number of hybrid automatic retransmission request bits is 3; if the downlink transmission modes of the three downlink component carriers are all multi-antenna transmission modes, hybrid automatic retransmission The number of request bits is ^6. For example, in a TDD system, a UE is currently configured or activated with two component carriers. If the downlink transmission mode of two component carriers is a single antenna transmission mode, the number of hybrid automatic retransmission request bits is n. 2; If the downlink transmission mode of one of the component carriers is the single antenna transmission mode and the other is the multi-antenna transmission mode, the number of hybrid automatic retransmission request bits is 3

Or, the number of hybrid automatic repeat request bits is ". The number of component carriers configured or activated for the UE is multiplied by the maximum number of transport blocks that can be carried by each PDSCH. For example, a certain UE is currently configured or activated with s component carriers, each One PDSCH can be transmitted on each component carrier, and the maximum number of transmission blocks that can be carried by each PDSCH is the number of hybrid automatic retransmission request bits = st

Or, the number of hybrid automatic repeat request bits is ^ the number of component carriers configured or activated by the UE.

2 times. For example, if a certain UE currently configures or activates two component carriers, the number of hybrid automatic retransmission request bits is "4.", or the number of hybrid automatic retransmission request bits is ^. HARQ ― HARQ, c ' VO where, is the hybrid automatic retransmission request bit number of the component carrier c. n The rule of the _HARQ m TE system is determined.

In the FDD system, the number of hybrid automatic repeat request bits is the total number of transport blocks received by the UE in one subframe. For example, a certain UE currently configures or activates three downlink component carriers. If the UE receives a PDSCH transmitted on one downlink component carrier in one subframe, and the PDSCH carries two transport blocks, the subframe The number of hybrid automatic repeat request bits is determined to be 2; if the UE receives the PDSCH transmitted on two downlink component carriers in one subframe, one PDSCH carries 2 transport blocks, and the other PDSCH carries 1 For each transport block, the subframe is automatically mixed with the number of retransmission request bits ^ _R . Determined to be 3.

The present invention is directed to the foregoing method embodiments, and correspondingly provides a user equipment embodiment for setting a corresponding transmit power for a third physical uplink control channel format. The structure of the user equipment is as shown in FIG. 3, and includes: a power reference quantity obtaining unit 310, a power offset determining unit 320, and a power setting unit 330, where: the power reference quantity acquiring unit 310 is configured to: calculate the power of acquiring the PUCCH reference format. The reference quantity p _{pU(XH ref} , and the obtained p _{pU (XH ref is} output to the power offset determination unit 320; the power reference quantity acquisition unit 310 is set to: calculate the acquisition ^^ according to the formula (2), before the specific calculation As mentioned, it will not be repeated here.

The power offset determining unit 320 is configured to: determine the power offset AP _{PUCCH of the} PUCCH format 3 based on the input P _{PU (XH ref} , and obtain p _{pU (the} sum of the _{XH ref} and the AP _PUCCH is output to the power setting unit 330; the power offset The determining unit 320 may determine the power offset AP _{PUCCH of the} PUCCH format 3 according to the foregoing method embodiment 1, the second embodiment, and the third embodiment, and how to determine the foregoing is specifically described herein, and details are not described herein again.

The power setting unit 330 is set to: according to the sum of the input P _{PUCCH ref} and the AP _PUCCH , The transmit power of the PUCCH. The user equipment embodiment shown in FIG. 3 further includes a primary cell maximum power configuration unit 300, where: the primary cell maximum power configuration unit 300 is configured to: determine a maximum transmit power MAX configured on the primary cell, and output the power to the power setting unit 330. The power setting unit 330 is configured to set the input parameter and p _{pU (} the minimum value of the sum of _XHref and ^^^ as the PUCCH transmission power setting. Those skilled in the art can understand that all or part of the above steps can be adopted. The program is instructed to complete the related hardware, and the program may be stored in a computer readable storage medium, such as a read only memory, a magnetic disk or an optical disk, etc. Alternatively, all or part of the steps of the above embodiments may also use one or more integrations. Correspondingly, each module unit in the above embodiments may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific combination of hardware and software. The description is only for the embodiments of the present invention, and is not intended to limit the present invention. The present invention is susceptible to various modifications and alternatives, and all modifications, equivalents, improvements, etc., within the spirit and scope of the invention are intended to be included within the scope of the appended claims.

Industrial Applicability The present invention can provide various schemes for setting the physical uplink control channel transmission power for the PUCCH format 3 when the user equipment uses the PUCCH format 3 to transmit the uplink control information, thereby ensuring reliable transmission of the uplink control information of the physical uplink control channel. .

Claims

Claim

A method for setting a power of a physical uplink control channel, where the method includes: determining, by a user equipment, uplink control information that is sent by using a third physical uplink control channel format, according to a power reference quantity based on a physical uplink control channel reference format. The power offset of the three physical uplink control channel formats sets the transmit power of the physical uplink control channel.

2. The method according to claim 1, wherein the physical uplink control channel reference format comprises any one of a first physical uplink control channel format, a second physical uplink control channel format, and a third physical uplink control channel format. The first physical uplink control channel format includes a physical uplink control channel format, a physical uplink control channel format la, and a physical uplink control channel format lb; and the second physical uplink control channel format includes a physical uplink control channel format. The physical uplink control channel format 2a and the physical uplink control channel format 2b.

The method according to claim 2, wherein the power reference quantity of the physical uplink control channel reference format is that the physical uplink control channel format la is a power reference quantity P of the physical uplink control channel reference format. _{Puee ref} , calculated according to the following formula:

^ PUCCH, ref 0) - ^ O PUCCH + PL + ), where,

Wherein, the obtained _{Ρρυ (} the unit of _ΧΗ is dBm) is calculated.

The method according to claim 3, wherein the power offset of the third physical uplink control channel format determined by the power reference quantity of the physical uplink control channel reference format comprises a fixed offset A _F — _PUCCH ( F) and/or a variable offset; wherein: the fixed offset Δ _Ρ — _pueeH (F) is a default value, a configuration value, and a plurality of information related to uplink control information carried by the physical uplink control channel a fixed offset value Δ _Ρ — any one of the fixed offset values A _{F pueeH} determined in the _PUCCH (F) set; the variable offset /^«;) is determined by the high-level configuration by means of table lookup Or determined by a function of the amount n of information that depends on the physical uplink control channel carrying uplink control information.

The method according to claim 4, wherein the determining is corresponding to a plurality of fixed offset values Δ _Ρ — _PUCCH (F) set related to an amount of uplink control information information carried by the physical uplink control channel. A fixed offset value A _{F pueeH} includes: pre-setting two or more sets of power offsets according to a relationship between a threshold value or a plurality of threshold values according to the information carried by the third physical uplink control channel format a value Δ _Ρ — a _PUCCH (F) set; the user equipment determines a corresponding set of power offset values A _F — _PUOTI (F) according to the information amount n carried by the third physical uplink control channel format, and The set of power offset values

A _F - _PUCCH (F) set is reported to the upper layer; and the upper layer configures a fixed offset value in the set of power offset values A _F - _PUCCH (F) to be reported as the corresponding fixed offset.

The method according to claim 2, wherein the power reference quantity of the physical uplink control channel reference format is that the third physical uplink control channel format is a power reference quantity of the physical uplink control channel reference format P _{puee ref} , calculated according to the following formula:

^ PUCCH, ref 0) - ^ O PUCCH + PL + ), where,

Said P. – _PUOTI is an open loop power control parameter equal to the cell specific amount P. — _N . _{MNAL PUOTI} and user equipment specific quantities. ^ _{ΡΤΙΓΓΗ和} ; Ρ is a downlink path loss estimate measured and calculated by the user equipment to the serving cell, the service The cell is configured by a higher layer; or the downlink path loss estimate measured and calculated by the user equipment on the primary cell; the downlink path loss estimation unit is dB; the g (0 is the current power of the physical uplink control channel) Control adjustment status;

The unit of calculation is obtained in dBm.

The method according to claim 6, wherein the power offset of the third physical uplink control channel format determined by the power reference quantity based on the physical uplink control channel reference format comprises a variable offset / z («; The variable offset is determined by the high-level configuration by looking up the table, or by a function that depends on the amount of information that the physical uplink control channel carries the uplink control information n.

The method according to claim 4 or 7, wherein the variable offset is determined by a function depending on an amount of information of the physical uplink control channel carrying uplink control information, and the function includes any one of the following functions : The first:

In the formula of ise, any one of the values k 2 , 4 , 6 , 8 , 10 is if _HARQ ≥ k

nsR + ⁿ HARQ

10 log. if n _SR + n _HAR Q≥ k Third: /?(") = /?( k

0 otherwise,

The number of information bits of the hybrid automatic repeat request is the number of information bits of the scheduling request.

9. The method according to claim 1, before the step of setting the transmit power of the physical uplink control channel, the method further comprising: determining a maximum transmit power configured on the primary cell ^ - C AX, setting a physical uplink control channel In the step of transmitting power, the user equipment obtains the transmit power of the physical uplink control channel according to the following formula, and then performs the setting: ^ PUCCH (0 ^- {^ CMAX, C, t^ PUCCH, ref + ^ PUCCH ]};

The _{Ρρυ(:(: Η} W is the obtained transmit power value of the physical uplink control channel, and the unit is dBm.

10. A user equipment, the user equipment comprising a power reference quantity acquisition unit, a power offset determination unit, and a power setting unit, wherein:

The power reference quantity obtaining unit is configured to: calculate a power reference quantity _{Ppu (xHref) of the} physical uplink control channel reference format, and output the obtained power/output to the power offset determining unit;

The power offset determining unit is configured to: determine, according to the input P _{PU (X ref,} a power offset AP _{PUCCH of} the third physical uplink control channel format, and obtain the P _{pU (XH ref} and the The sum of ^^^ is output to the power setting unit;

The power setting unit is configured to: set a transmit power of the physical uplink control channel according to the _{sum of the} input P _pua3⁄4ref and the AP _PUCCH .

The user equipment according to claim 10, wherein the physical uplink control channel reference format includes any one of a first physical uplink control channel format, a second physical uplink control channel format, and a third physical uplink control channel format. The first physical uplink control channel format includes a physical uplink control channel format 1, a physical uplink control channel format la, and a physical uplink control channel format lb; and the second physical uplink control channel format includes a physical uplink control channel format 2 The physical uplink control channel format 2a and the physical uplink control channel format 2b.

The user equipment according to claim 11, wherein the power reference quantity obtaining unit is configured to calculate a power reference quantity P _{UCCH ref} for obtaining a physical uplink control channel reference format as follows: The format la is the power reference quantity _{Ppu (xHref of the} physical uplink control channel reference format, and the power reference in the physical uplink control channel reference format is obtained according to the following formula: pucCH'ref:

^ PUCCH, ref 0) - ^ O PUCCH + PL + ), where,

Said P. – _PUOTI is an open loop power control parameter equal to the cell specific amount P. — _N . _{MNAL PUOTI} and user equipment specific amount P. ― _PueeH sum; is the downlink path loss estimate measured and calculated by the user equipment to the serving cell; or the downlink path loss estimate measured and calculated by the user equipment to the primary cell; the downlink path loss estimation unit is dB; The current power control adjustment state of the physical uplink control channel;

The unit of calculation is obtained in dBm.

The user equipment according to claim 12, wherein the power offset determining unit is based on the input P _{PU (} the power offset _{ΔΡ ρυα 第三} of the third physical uplink control channel format determined by _{XH ref} includes: a fixed offset Set Δ _Ρ — _PUCCH (F) and/or a variable offset ψ , where: the fixed offset A _{F PUCCH} ( ) is a default value, a configuration value, and a slave to the physical uplink control letter Channel carries uplink control information to a plurality of information relating to a fixed offset value Δ Ρ _- _PUCCH (F) determining any one of a set of corresponding fixed offset set;

The variable offset /^«;) is determined by means of a look-up table or by a function of the amount of information n that carries uplink control information depending on the physical uplink control channel.

The user equipment according to claim 11, wherein the power reference quantity obtaining unit is configured to calculate a power reference quantity P _UCC3⁄4ref obtained by acquiring a physical uplink control channel reference format as _follows : The channel format is the power reference quantity _{Ppu (xHref of the} physical uplink control channel reference format, and the power reference quantity P _{puee ref of the} physical uplink control channel reference format is calculated according to the following formula: ^ PUCCH, ref ( ^? ) ~ ^ O PUCCH + PL + g{ ), where,

The unit of calculation is obtained in dBm.

The user equipment according to claim 14, wherein the power offset determining unit is based on the input P _{PU (} the power offset _{ΔΡ ρυα 第三} of the third physical uplink control channel format determined by _{XH ref} includes: a variable The offset/the variable offset is determined by means of a look-up table or by a function of the amount of information that carries the uplink control information n depending on the physical uplink control channel.

The user equipment according to claim 13 or 15, wherein the power offset determining unit is further configured to: determine, by a function of a quantity of information that depends on the physical uplink control channel carrying uplink control information Variable bias / ^«;), the function includes any of the following functions: The first one: /?(") =

0 otherwise, where any value of k 2, 4, 6, 8, 10 is if _HARQ ≥ k

nsR + ⁿ HARQ

10 log. if n _SR + n _HAR Q≥ k Third: /?(") = /?( k

0 otherwise,

The user equipment according to claim 10, wherein the user equipment further comprises a primary cell maximum power configuration unit, wherein: the primary cell maximum power configuration unit is configured to: determine a maximum transmit power MAX configured on the primary cell, And outputting to the power setting unit;

The power setting unit is set to input the Ρ _。. And a minimum value of the sum of P _p ^ _Href and „^ as the transmit power setting of the physical uplink control channel,