CN101409894A - Method for transmitting ascending control information and method for calculating transmission parameter - Google Patents
Method for transmitting ascending control information and method for calculating transmission parameter Download PDFInfo
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Abstract
The invention provides a method for transferring uplink control information. The method comprises the steps as follows: when uplink shared channel data and the uplink control information are required to be transferred in an uplink shared channel PUSCH of a subframe i simultaneously, a user terminal obtains the transmission power P<PUSCH> (init) of primarily transferred uplink shared channel data and the transmission power P<PUSCH> (i) of the uplink shared channel data transferred in the subframe i; the user terminal confirms the symbol quantity of the uplink control information after being coded in the subframe i according to the comparison relation between P<PUSCH> (init) and P<PUSCH> (i) and the size and the bandwidth of a transmission block when the uplink shared channel data is transferred primarily; the user terminal codes the uplink control information according to the symbol quantity of the uplink control information after being coded and transfers the coded uplink control information to a base station in the PUSCH of the subframe i.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of computational methods of transmission method and transmission parameter of ascending control information.
Background technology
At LTE (Long Term Evolution, Long Term Evolution) in the system, uplink physical channel mainly contains PUCCH (Physical Uplink Control Channel, Physical Uplink Control Channel), PUSCH (Physical Uplink Shared Channel, Physical Uplink Shared Channel) etc. channel is formed, and PUCCH is used for transmitting uplink control information.Wherein, ascending control information comprises the ACK (Acknowledge of up feedback, correctly reply)/NACK (Non-Acknowledge, wrong responses), CQI (Channel Quality Indicator, the channel quality indication), RI (Rank Indicator, rank indication information), PMI information such as (Precoding Matrix Indicator, pre-coding matrix indications).PUSCH can only transmit Uplink Shared Channel (Uplink Shared channel, be called for short UL-SCH) data, also can a transmitting uplink control information, perhaps, transmit Uplink Shared Channel data and ascending control information simultaneously.
All user terminals in the sub-district (User Equipment, be called for short UE) need carry out power setting to the transmitting power of the Physical Uplink Shared Channel of each subframe.In the adjustment process of uplink closed loop, specific to a certain subframe i, the formula (or be called the power control formula, hereinafter referred to as formula 1) that is provided with of the transmitting power of its Physical Uplink Shared Channel (is unit with dBm (decibels above milliwatt)) is:
P
PUSCH(i)=min{P
MAX,10·log
10(M
PUSCH(i))+P
O_PUSCH(j)+α·PL+Δ
TF(i)+f(i)}。
Wherein:
P
MAXThe expression upper limit of emission power.
M
PUSCH(i) be used to transmit the bandwidth of PUSCH among the expression subframe i, just be used to transmit the Resource Block quantity of PUSCH among the subframe i.
P
O_PUSCH(j) expression target reference power, the concrete definition of variable j please refer to the relevant criterion document of LTE.
α represents the path loss modifying factor.
PL represents path loss.
Δ
TF(i) be called as the transformat offset parameter; Work as K
S=1.25 o'clock,
Work as K
S=0 o'clock, Δ
TF(i)=0; K
SBe the total parameter in a sub-district, by RRC (Radio Resource Control, the Radio Resource control) preparation of high level; MPR (i)=TBS (i)/N
RE(i), TBS (i) expression subframe i goes up the size of transmission block; NRE (i) expression subframe i goes up the quantity of Resource Unit;
N
Symb PUSCHSC-FDMA (Single Carrier-Frequency Division MultipleAccess, the single-carrier frequency division multiple access) symbol quantity that is used to transmit PUSCH among the expression subframe i; N
Sc RBRepresent subcarrier (Resource Unit) quantity that comprises in the Resource Block, be used to represent the size of a Resource Block on the frequency domain.
The power control correction function of f (i) expression subframe i.
At present, when sending in ascending control information and the capable physically simultaneously shared channel of Uplink Shared Channel data, the symbol quantity behind the ascending control information coding is determined by the transmission block size and the bandwidth information such as (are unit representation with the subcarrier) of the described Uplink Shared Channel data of first transmission.
ACK/NACK and the RI symbolic number Q behind coding
ACKAnd Q
RICan calculate by following formula:
Q
ACK=Q
m·Q′;Q
RI=Q
m·Q′。
Above-mentioned Q
mBe the parameter relevant with modulation system, when modulation system is QPSK (Quaternary PhaseShift Keying, quarternary phase-shift keying (QPSK)), when 16QAM (Quadrature Amplitude Modulation, quadrature amplitude modulation) and 64QAM, its value is respectively 2,4,6.
The value of Q ' is determined by following formula:
Wherein:
The ACK/NACK before the O presentation code or the quantity of RI original information bits.
M
Sc PUSCHThe bandwidth (is unit representation with the subcarrier) of the Physical Uplink Shared Channel of the described Uplink Shared Channel data of the first transmission of expression.
β
Offset PUSCHIt is the power offset values of control information relative data.
Code block number (transmission block can comprise one or more code blocks) when C is the described Uplink Shared Channel data of first transmission, K
rR bit number that code block comprised when being the described Uplink Shared Channel data of first transmission;
The transmission block size of the described Uplink Shared Channel data of the first transmission of expression.
M
Sc PUSCH-currentThe bandwidth (is unit representation with the subcarrier) of representing the described Uplink Shared Channel data of current subframe (being subframe i) transmission.
Symbolic number Q behind the CQI/PMI coding
CQICan calculate by following formula:
Q
CQI=Q
m·Q′。
Above-mentioned Q
mBe the parameter relevant with modulation system, when modulation system was QPSK, 16QAM and 64QAM, its value was respectively 2,4,6.
The value of Q ' is determined by following formula:
Wherein:
O is the length of CQI/PMI information before the coding, is that unit represents with bit.
L be cyclic redundancy check bits that the CQI/PMI bit is added length (when O≤11, L=0; Under other situations, L=8).
M
Sc PUSCHThe bandwidth (is unit representation with the subcarrier) of the Physical Uplink Shared Channel of the described Uplink Shared Channel data of the first transmission of expression.
β
Offset PUSCHIt is the power offset values of control information relative data.
Code block number (transmission block can comprise one or more code blocks) when C is the described Uplink Shared Channel data of first transmission; K
rR bit number that code block comprised when being the described Uplink Shared Channel data of first transmission;
The transmission block size of the described Uplink Shared Channel data of the first transmission of expression.
Q
MaxBe that CQI/PMI information behind the coding allows the maximum symbolic number that takies in described Uplink Shared Channel,
When the Uplink Shared Channel data that retransmit were transmitted in the PUSCH of subframe i with ascending control information simultaneously, the symbol quantity behind the ascending control information coding was definite by the transmission block size and the bandwidth information such as (are unit representation with the subcarrier) of the described Uplink Shared Channel data of first transmission; And by above-mentioned power control formula (being formula 1) as can be known, the transmitting power of PUSCH is to be determined by the bandwidth of the described Uplink Shared Channel data of transmission among the subframe i, this just makes the coding efficiency of the ascending control information that transmits among the transmitting power of PUSCH among the subframe i and the PUSCH not match, this may cause the transmission performance of ascending control information not to be guaranteed, and then causes that the overall performance of system descends.
Summary of the invention
Technical problem to be solved by this invention is, overcome the deficiencies in the prior art, provide a kind of when in ascending control information and Uplink Shared Channel data are gone shared channel simultaneously physically, transmitting, can avoid the transmission method of the unmatched ascending control information of coding efficiency of the ascending control information that transmits among the transmitting power of PUSCH and the PUSCH and the computational methods of transmission parameter.
In order to address the above problem, the invention provides a kind of transmission method of ascending control information, this method comprises:
When transmitting in Uplink Shared Channel data and ascending control information need simultaneously the Physical Uplink Shared Channel PUSCH at subframe i, user terminal obtains the transmitting power P of the described Uplink Shared Channel data of first transmission
PUSCH(init) the transmitting power P of the described Uplink Shared Channel data of transmission and among the subframe i
PUSCH(i);
User terminal is according to P
PUSCH(init) and P
PUSCH(i) relativity and transmission block size and bandwidth when transmitting described Uplink Shared Channel data are for the first time determined the symbol quantity behind the coding of ascending control information described in the subframe i;
Symbol quantity after user terminal is encoded according to described ascending control information is encoded to described ascending control information, and the described ascending control information after will encoding in the PUSCH of subframe i is transferred to the base station.
In addition, described ascending control information comprises: correctly reply ACK and/or wrong responses NACK and/or rank indication information RI;
User terminal adopts the symbol quantity Q after following formula is determined ACK, NACK coding
ACK, the symbol quantity Q behind the RI coding
RI:
Q
ACK=Q
m·Q′;Q
RI=Q
m·Q′;
Wherein:
Or:
Or:
O is the ACK before encoding or the quantity of NACK or RI original information bits.
In addition, described ascending control information comprises: correctly reply ACK and/or wrong responses NACK and/or rank indication information RI;
User terminal adopts the symbol quantity Q after following formula is determined ACK, NACK coding
ACK, the symbol quantity Q behind the RI coding
RI:
Q
ACK=Q
m·Q′;Q
RI=Q
m·Q′;
Wherein:
Or:
Wherein:
O is the ACK before encoding or the quantity of NACK or RI original information bits.
In addition, described ascending control information comprises: channel quality indicator (CQI) and/or pre-coding matrix indication PMI;
User terminal adopts the symbol quantity Q after following formula is determined CQI and PMI coding
CQI:
Q
CQI=Q
m·Q′;
Or:
Or:
O is the quantity of preceding CQI of coding or PMI original information bits.
In addition, described ascending control information comprises: channel quality indicator (CQI) and/or pre-coding matrix indication PMI;
User terminal adopts the symbol quantity Q after following formula is determined CQI and PMI coding
CQI:
Q
CQI=Q
m·Q′;
O is the quantity of preceding CQI of coding or PMI original information bits.
The present invention also provides a kind of computational methods of ascending control information transmission parameter, when Uplink Shared Channel data and ascending control information needed transmit in the PUSCH of subframe i simultaneously, user terminal was according to the transmitting power P of the described Uplink Shared Channel data of first transmission
PUSCH(init) the transmitting power P of the described Uplink Shared Channel data of transmission and among the subframe i
PUSCH(i) relativity and transmission block size and bandwidth when transmitting described Uplink Shared Channel data are for the first time determined the symbol quantity behind the coding of ascending control information described in the subframe i.
In addition, described ascending control information comprises: correctly reply ACK and/or wrong responses NACK and/or rank indication information RI;
User terminal adopts the symbol quantity Q after following formula is determined ACK, NACK coding
ACK, the symbol quantity Q behind the RI coding
RI:
Q
ACK=Q
m·Q′;Q
RI=Q
m·Q′;
Wherein:
Or:
Or:
O is the ACK before encoding or the quantity of NACK or RI original information bits.
In addition, described ascending control information comprises: correctly reply ACK and/or wrong responses NACK and/or rank indication information RI;
User terminal adopts the symbol quantity Q after following formula is determined ACK, NACK coding
ACK, the symbol quantity Q behind the RI coding
RI:
Q
ACK=Q
m·Q′;Q
RI=Q
m·Q′;
Wherein:
Or:
Wherein:
O is the ACK before encoding or the quantity of NACK or RI original information bits.
In addition, described ascending control information comprises: channel quality indicator (CQI) and/or pre-coding matrix indication PMI;
User terminal adopts the symbol quantity Q after following formula is determined CQI and PMI coding
CQI:
Q
CQI=Q
m·Q′;
Or:
Or:
O is the quantity of preceding CQI of coding or PMI original information bits.
In addition, described ascending control information comprises: channel quality indicator (CQI) and/or pre-coding matrix indication PMI;
User terminal adopts the symbol quantity Q after following formula is determined CQI and PMI coding
CQI:
Q
CQI=Q
m·Q′;
O is the quantity of preceding CQI of coding or PMI original information bits.
In sum, adopt method of the present invention, by adjusting the symbol quantity of coding back ascending control information, the coding efficiency that has overcome the ascending control information that transmits among the transmitting power of PUSCH and the PUSCH problem that the systematic function that caused descends that do not match, guarantee the transmission performance of ascending control information, and then guaranteed the overall performance of system.
Description of drawings
Fig. 1 is the transmission method flow chart of embodiment of the invention ascending control information.
Embodiment
Basic thought of the present invention is, when Uplink Shared Channel data and ascending control information during simultaneously in the PUSCH of subframe i transmission, terminal is determined coding back uplink control signaling symbolic number according to the transmission power level of the described Uplink Shared Channel data of transmission among the transmitting power of the described Uplink Shared Channel data of first transmission and the subframe i.
Describe the present invention below in conjunction with drawings and Examples.
Fig. 1 is the transmission method flow chart of embodiment of the invention ascending control information; As shown in Figure 1, this method comprises the steps:
101: when Uplink Shared Channel data and ascending control information needed transmit in the PUSCH of subframe i simultaneously, UE calculated the PUSCH transmitting power of the subframe init when obtaining the described Uplink Shared Channel data of first transmission (promptly transmitting) in subframe init: P
PUSCH(init) and subframe i go up the transmitting power of the described Uplink Shared Channel data of transmission: P
PUSCH(i); When the Uplink Shared Channel data on the subframe i are first transmission, P
PUSCH(init)=P
PUSCH(i);
UE can be according to the bandwidth that is used to transmit PUSCH from Physical Downlink Control Channel in the transmission block size of the corresponding subframe that obtains (subframe init and subframe i) and the corresponding subframe (subframe init and subframe i), and adopting formula 1 to calculate above-mentioned respectively is the transmission power level P of unit with dBm
PUSCH(init) and P
PUSCH(i);
Above-mentioned ascending control information comprises: one or more ascending control informations among ACK/NACK, CQI/PMI, the RI.
102:UE is according to the P that calculates
PUSCH(init) and P
PUSCH(i) determine the transmission parameter of ascending control information, i.e. the symbolic number of the ascending control information behind the coding that in subframe i, transmits.Specifically comprise:
102a:ACK and the NACK symbolic number Q behind coding
ACK, and the symbolic number Q of RI behind coding
RIAdopt following formula to calculate:
Q
ACK=Q
m·Q′;Q
RI=Q
m·Q′。
Wherein, Q
mBe the parameter relevant with modulation system, when modulation system was QPSK, 16QAM and 64QAM, its value was respectively 2,4,6.
The value of Q ' is determined by following formula (formula 2):
Wherein:
The ACK before the O presentation code or the quantity of NACK or RI original information bits.
M
Sc PUSCHThe bandwidth (is unit representation with the subcarrier) of the Physical Uplink Shared Channel of the described Uplink Shared Channel data of the first transmission of expression.
β
Offset PUSCHIt is the power offset values of control information relative data.
Code block number (transmission block can comprise one or more code blocks) when C is the described Uplink Shared Channel data of first transmission, K
rR bit number that code block comprised when being the described Uplink Shared Channel data of first transmission;
The transmission block size of the described Uplink Shared Channel data of the first transmission of expression.
M
Sc PUSCH-currentThe bandwidth (is unit representation with the subcarrier) of representing the described Uplink Shared Channel data of current subframe (being subframe i) transmission.
The aforementioned calculation formula can also be expressed as:
Or:
102b:CQI and the PMI symbolic number Q behind coding
CQIAdopt following formula to calculate:
Q
CQI=Q
m·Q′。
Above-mentioned Q
mBe the parameter relevant with modulation system, when modulation system was QPSK, 16QAM and 64QAM, its value was respectively 2,4,6.
The value of Q ' is determined by following formula (formula 3):
Wherein:
O is the length of preceding CQI of coding or PMI information, is that unit represents with bit.
L be cyclic redundancy check bits that the CQI/PMI bit is added length (when O≤11, L=0; Under other situations, L=8).
M
Sc PUSCHThe bandwidth (is unit representation with the subcarrier) of the Physical Uplink Shared Channel of the described Uplink Shared Channel data of the first transmission of expression.
β
Offset PUSCHIt is the power offset values of control information relative data.
Code block number (transmission block can comprise one or more code blocks) when C is the described Uplink Shared Channel data of first transmission; K
rR bit number that code block comprised when being the described Uplink Shared Channel data of first transmission;
The transmission block size of the described Uplink Shared Channel data of the first transmission of expression.
Q
MaxBe that CQI/PMI information behind the coding allows the maximum symbolic number that takies in described Uplink Shared Channel,
When not having RI information to send in the described Uplink Shared Channel, Q
RI=0.
The aforementioned calculation formula can also be expressed as:
Or:
103:UE is according to above-mentioned Q
ACK, Q
RI, and Q
CQIIn one or more ascending control information is encoded, and the ascending control information after will encoding is transferred to NodeB (Node B, i.e. base station) in the PUSCH of subframe i.
So far, flow process of the inventive method and computing formula introduction finish.In order to understand the present invention better, provide as giving a definition and related description:
P
PUSCH(init) and P
PUSCH(i) being is the transmission power level of unit with dBm, can be called the decibels above milliwatt transmission power level of subframe init and subframe i;
Because in formula 2, the formula 3
Therefore, during the symbolic number of the ascending control information that the present invention is transmitted with the Uplink Shared Channel data at the PUSCH that calculates subframe i, uses the bandwidth of Physical Uplink Shared Channel of the described Uplink Shared Channel data of first transmission and transmission block size and subframe init and subframe i with volt as the launching electrical level value of unit square the uplink control signaling symbolic number of ratio parameters such as (can certainly be that this ratio multiply by the value that a nonzero coefficient obtains again) after determining to encode among the subframe i.
According to basic principle of the present invention, the foregoing description can also have multiple mapping mode, for example:
(1) can adopt following formula place of equation 2:
Wherein, β
PUSCH InitBe the amplitude factor (amplitude scaling factor) of the shared launching electrical level of the described physical uplink of initial transmission (promptly in subframe init, transmitting),
β
PUSCH CurrentBe the amplitude factor that subframe i goes up the shared launching electrical level of the described physical uplink of transmission,
(2) can adopt following formula place of equation 2:
Wherein, β
Asf PUSCHBe the ratio of the launching electrical level that the described physical uplink of transmission is shared on subframe init and subframe i,
(3) can adopt following formula place of equation 3:
Wherein, β
PUSCH InitBe the amplitude factor (amplitude scaling factor) of the shared launching electrical level of the described physical uplink of initial transmission (promptly in subframe init, transmitting),
β
PUSCH CurrentBe the amplitude factor that subframe i goes up the shared launching electrical level of the described physical uplink of transmission,
(4) can also adopt following formula place of equation 3:
Wherein, β
Asf PUSCHBe the ratio of the launching electrical level that the described physical uplink of transmission is shared on subframe init and subframe i,
Claims (10)
1, a kind of transmission method of ascending control information is characterized in that, this method comprises:
When transmitting in Uplink Shared Channel data and ascending control information need simultaneously the Physical Uplink Shared Channel PUSCH at subframe i, user terminal obtains the transmitting power P of the described Uplink Shared Channel data of first transmission
PUSCH(init) the transmitting power P of the described Uplink Shared Channel data of transmission and among the subframe i
PUSCH(i);
User terminal is according to P
PUSCH(init) and P
PUSCH(i) relativity and transmission block size and bandwidth when transmitting described Uplink Shared Channel data are for the first time determined the symbol quantity behind the coding of ascending control information described in the subframe i;
Symbol quantity after user terminal is encoded according to described ascending control information is encoded to described ascending control information, and the described ascending control information after will encoding in the PUSCH of subframe i is transferred to the base station.
2, the method for claim 1 is characterized in that,
Described ascending control information comprises: correctly reply ACK and/or wrong responses NACK and/or rank indication information RI;
User terminal adopts the symbol quantity Q after following formula is determined ACK, NACK coding
ACK, the symbol quantity Q behind the RI coding
RI:
Q
ACK=Q
m·Q′;Q
RI=Q
m·Q′;
Wherein:
Or:
Or:
O is the ACK before encoding or the quantity of NACK or RI original information bits.
3, the method for claim 1 is characterized in that,
Described ascending control information comprises: correctly reply ACK and/or wrong responses NACK and/or rank indication information RI;
User terminal adopts the symbol quantity Q after following formula is determined ACK, NACK coding
ACK, the symbol quantity Q behind the RI coding
RI:
Q
ACK=Q
m·Q′;Q
RI=Q
m·Q′;
Wherein:
Or:
Wherein:
O is the ACK before encoding or the quantity of NACK or RI original information bits.
4, as claim 1 or 2 or 3 described methods, it is characterized in that,
Described ascending control information comprises: channel quality indicator (CQI) and/or pre-coding matrix indication PMI; User terminal adopts the symbol quantity Q after following formula is determined CQI and PMI coding
CQI:
Q
CQI=Q
m·Q′;
Or:
Or:
O is the quantity of preceding CQI of coding or PMI original information bits.
5, as claim 1 or 2 or 3 described methods, it is characterized in that,
Described ascending control information comprises: channel quality indicator (CQI) and/or pre-coding matrix indication PMI; User terminal adopts the symbol quantity Q after following formula is determined CQI and PMI coding
CQI:
Q
CQI=Q
m·Q′;
O is the quantity of preceding CQI of coding or PMI original information bits.
6, a kind of computational methods of ascending control information transmission parameter is characterized in that:
When Uplink Shared Channel data and ascending control information needed transmit in the PUSCH of subframe i simultaneously, user terminal was according to the transmitting power P of the described Uplink Shared Channel data of first transmission
PUSCH(init) the transmitting power P of the described Uplink Shared Channel data of transmission and among the subframe i
PUSCH(i) relativity and transmission block size and bandwidth when transmitting described Uplink Shared Channel data are for the first time determined the symbol quantity behind the coding of ascending control information described in the subframe i.
7, method as claimed in claim 6 is characterized in that,
Described ascending control information comprises: correctly reply ACK and/or wrong responses NACK and/or rank indication information RI;
User terminal adopts the symbol quantity Q after following formula is determined ACK, NACK coding
ACK, the symbol quantity Q behind the RI coding
RI:
Q
ACK=Q
m·Q′;Q
RI=Q
m·Q′;
Wherein:
Or:
Or:
O is the ACK before encoding or the quantity of NACK or RI original information bits.
8, method as claimed in claim 6 is characterized in that,
Described ascending control information comprises: correctly reply ACK and/or wrong responses NACK and/or rank indication information RI;
User terminal adopts the symbol quantity Q after following formula is determined ACK, NACK coding
ACK, the symbol quantity Q behind the RI coding
RI:
Q
ACK=Q
m·Q′;Q
RI=Q
m·Q′;
Wherein:
Or:
Wherein:
O is the ACK before encoding or the quantity of NACK or RI original information bits.
9, as claim 6 or 7 or 8 described methods, it is characterized in that,
Described ascending control information comprises: channel quality indicator (CQI) and/or pre-coding matrix indication PMI;
User terminal adopts the symbol quantity Q after following formula is determined CQI and PMI coding
CQI:
Q
CQI=Q
m·Q′;
Or:
Or:
O is the quantity of preceding CQI of coding or PMI original information bits.
10, as claim 1 or 2 or 3 described methods, it is characterized in that,
Described ascending control information comprises: channel quality indicator (CQI) and/or pre-coding matrix indication PMI;
User terminal adopts the symbol quantity Q after following formula is determined CQI and PMI coding
CQI:
Q
CQI=Q
m·Q′;
O is the quantity of preceding CQI of coding or PMI original information bits.
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