CN101933282A - Method and apparatus of supporting harq - Google Patents
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- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
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Abstract
A method of supporting Hybrid Automatic Repeat Request (HARQ) includes receiving an initial uplink grant on a downlink channel, transmitting uplink data on an uplink channel using the initial uplink grant, receiving a request for retransmission of the uplink data, determining at least one transmission parameter of a channel quality indicator (CQI) from the initial uplink grant, multiplexing retransmission data of the uplink data with the CQI, and transmitting the multiplexed data on the uplink channel. Amount of resources for transmission of the CQI is determined based on the at least one transmission parameter.
Description
Technical field
The present invention relates to radio communication, relate more specifically in wireless communication system, support to mix the method and apparatus of automatic repeat requests (HARQ).
Background technology
Wireless communication system is deployed in the whole world widely, so that the various types of communication services such as voice or data to be provided.Generally, wireless communication system is a multi-address system, and it can be supported and a plurality of user's communications by sharing available system resource (for example, bandwidth, through-put power etc.).The example of multi-address system comprises code division multiple access (CDMA) system, frequency division multiple access (FDMA) system, time division multiple access (TDMA) system, OFDM (OFDMA) system, single-carrier frequency division multiple access (SC-FDMA) system etc.
Current development in the advanced wireless communication has caused the high spectrum efficiency of needs and has communicated by letter reliably.Unfortunately, the packet error that is caused by fading channel environment and the interference that produces from various sources makes that the capacity of whole system is limited.
Mixing automatic repeat requests (HARQ) is the ARQ agreement that combines forward error correction (FEC), and by one of sophisticated technology that is considered as consumingly being used for following reliable communication.The HAQR scheme can mainly be divided into two types.A kind of is that HARQ-chase merges (CC), it is disclosed in hereinafter: D.Chase, Code Combining:A maximum-likelihooddecoding approach for combining an arbitrary number of noisy packets, IEEE Trans.on Commun., Vol.33, pp.593-607, in May, 1985.Another kind is HARQ steadily increase redundancy (IR).In HARQ-CC, when receiver detected mistake by Cyclic Redundancy Check in the grouping that decoding sends, the same packets with identical modulation and coding was resent to receiver.Simultaneously, in order to realize coding gain, HARQ-IR retransmits different groupings, wherein, can control parity bits by deleting surplus and retransmitting.In order to carry out HARQ, need exchange to be used to affirmative acknowledgement (ACK)/negative response (NACK) information that indicates whether that needs are retransmitted.
Adaptive modulation and coding (AMC) also is the technology that is used to provide reliable communication.Base station (BS) is by using modulation and the encoding scheme (MCS) that is identified for transmitting from the CQI (CQI) of subscriber equipment (UE) reception.Usually, CQI is the index of entity that the MCS table of a plurality of MCS is shown.UE sends CQI by using two kinds of methods.A kind of is periodically to send CQI.Another kind is to send CQI under the request of BS.
Third generation partner program (3GPP) Long Term Evolution (LTE) is to use the universal terrestrial radio of evolution to insert the part of Universal Mobile Telecommunications System (E-UMTS) of the evolution of (E-UTRA), and, in down link, adopt OFDMA and in up link, adopt SC-FDMA.The resource allocation of 3GPP LTE is based on dynamic dispatching.The downlink physical channel of 3GPP LTE can be divided into physical downlink control channel (PDCCH) that is used for the bearing resource assignment information and the physical down link sharing channel (PDSCH) that is used for the carries downlink data.Uplink physical channel can be divided into the physical uplink control channel (PUCCH) that is used to carry uplink control information and be used to carry the physical uplink link sharing channel (PUSCH) of uplink data.In downlink transmission, at first receiving downlink permission on PDCCH of UE, receiving downlink data on the PDSCH that indicates by the down link permission then.In ul transmissions, UE is the receiving uplink permission on PDCCH, sends uplink data then on the PUSCH by up link permission indication.Dynamic dispatching is to carry out the method that efficient resource distributes.Yet, UE always at first the permission of receiving downlink/up link to send and/or to receive data.
Signaling consumption is the main cause of low transmission efficient and low frequency efficient.In dynamic dispatching, except the reception of PDCCH, a plurality of signaling manipulations of the exchange of the transmission parameter by using exchange such as ACK/NACK information, CQI etc. are carried out HARQ operation and CQI transmission.
Therefore, need a kind of method that can reduce the signaling consumption that in the process of carrying out HARQ, causes by the CQI transmission.
Summary of the invention
Technical problem
The invention provides the method for a kind of multiplexing and transmitting channel quality indicator (CQI) and retransmission data.
Technical scheme
In one aspect, provide a kind of support in wireless communication system to mix the method for automatic repeat requests (HARQ).Described method comprises: receive the initial uplink permission on downlink channel; Use described initial uplink permission on uplink channel, to send uplink data; Reception is for the request of retransmitting described uplink data; Determine at least one transmission parameter of CQI (CQI) from described initial uplink permission; The retransmission data and the described CQI of described uplink data is multiplexing, wherein, be identified for the stock number of the transmission of described CQI based on described at least one transmission parameter; And, on described uplink channel, send described multiplexing data.
In certain embodiments, described method may further include: receive the repeating transmission up link permission of the repeating transmission that is used for described uplink data, wherein, come the retransmission data of multiplexing described uplink data by using described repeating transmission up link permission.Can in described repeating transmission up link permission, comprise the request that is used to report described CQI.
By using the permission of described initial uplink, retransmission data that can multiplexing described uplink data.Described downlink channel can be physical downlink control channel (PDCCH), and described uplink channel can be a physical uplink link sharing channel (PUSCH).
At least one transmission parameter of described CQI can be relevant with encoding scheme (MCS) with the modulation of described CQI.Can determine at least one transmission parameter of described CQI, so that the MCS of described CQI is identical with the MCS of described uplink data.
In yet another aspect, provide a kind of equipment that is used for radio communication.Described equipment comprises: radio frequency (RF) unit is used for sending and receiving radio signals; And, processor, itself and described RF unit are coupled, and be configured on downlink channel, receive the initial uplink permission, use described initial uplink permission on uplink channel, to send uplink data, reception is to retransmitting the request of described uplink data, determine at least one transmission parameter of CQI from described initial uplink permission, the retransmission data and the described CQI of described uplink data is multiplexing, wherein, be identified for the stock number of the transmission of described CQI based on described at least one transmission parameter, and described processor is configured to send multiplexing data on described uplink channel.
Beneficial effect
A kind of method that sends retransmission data and CQI (CQI) in carrying out the process of mixing automatic repeat requests (HARQ) has been proposed.Therefore, can accurately carry out the operation of HARQ and adaptive modulation and coding (AMC), and, signaling consumption can be reduced.
Description of drawings
Fig. 1 illustrates wireless communication system.
Fig. 2 is illustrated in the structure of the radio frame in third generation partner program (3GPP) Long Term Evolution (LTE).
Fig. 3 illustrates the exemplary configurations of downlink subframe.
Fig. 4 is illustrated in the structure of the uplink sub-frames among the 3GPP LTE.
Fig. 5 illustrates up link and mixes automatic repeat requests (HARQ) and CQI (CQI) transmission.
Fig. 6 is illustrated in the dynamic dispatching in the ul transmissions.
Fig. 7 is illustrated in the data on the physical uplink link sharing channel (PUSCH) and the multiplexing exemplary diagram of control information.
Fig. 8 is illustrated in the resource mapping on the PUSCH.
Fig. 9 illustrates the flow chart of HARQ method according to an embodiment of the invention.
Figure 10 illustrates the flow chart of HARQ method in accordance with another embodiment of the present invention.
Figure 11 illustrates the flow chart of HARQ method in accordance with another embodiment of the present invention.
Figure 12 illustrates the flow chart of HARQ method in accordance with another embodiment of the present invention.
Figure 13 is the block diagram that the equipment that is used for radio communication according to an embodiment of the invention is shown.
Embodiment
Technology described herein can be used for various wireless communication systems, such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), OFDM (OFDMA), single-carrier frequency division multiple access (SC-FDMA) etc.Can use radiotechnics to realize CDMA such as universal terrestrial radio access (UTRA) or CDMA-2000.Can use radiotechnics to realize TDMA such as global system for mobile communications (GSM)/general packet radio service (GPRS)/enhanced data rates for gsm evolution (EDGE).Can use the radiotechnics of UTRA (E-UTRA) such as IEEE (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, evolution etc. to realize OFDMA.UTRA is the part of Universal Mobile Telecommunications System (UMTS).Third generation partner program (3GPP) Long Term Evolution (LTE) is to use the part of the evolution UMTS (E-UMTS) of E-UTRA.3GPP LTE uses OFDMA in down link, and uses SC-FDMA in up link.
For clear, following explanation will concentrate on the 3GPP LTE.Yet technical characterictic of the present invention is not limited thereto.
Fig. 1 illustrates wireless communication system.
Referring to Fig. 1, wireless communication system 10 comprises at least one base station (BS) 11.(be commonly referred to as the sub-district, cell) 15a, 15b and 15c provide communication service to BS 11 to specific geographic area.The sub-district can be divided into a plurality of zones and (be called the sector, sector).Subscriber equipment (UE) 12 can be that fix or mobile, and available other term is called, such as mobile radio station (MS), user terminal (UT), subscriber station (SS), wireless device, PDA(Personal Digital Assistant), radio modem, handheld device etc.BS 11 generally is the fixed station of communicating by letter with UE 12, and available other term calls, such as the Node B (eNB) of evolution, base transceiver station (BTS), access point etc.
Below, the communication link of down link (DL) expression from BS to UE, the communication link of up link (UL) expression from UE to BS.In DL, transmitter can be the part of BS, and receiver can be the part of UE.In UL, transmitter can be the part of UE, and receiver can be the part of BS.
Wireless communication system can support uplink and/or down link mix automatic repeat requests (HARQ).In addition, can use CQI (CQI) to support adaptive modulation and coding (AMC).
CQI indicating downlink downlink channel state, and can comprise CQI index and/or pre-coding matrix index (PMI).Each entity of CQI index indication modulation and encoding scheme (MCS) table, described modulation and encoding scheme (MCS) table comprises a plurality of entities that dispose by assembly coding rate and modulation scheme.PMI is based on the index of the pre-coding matrix of code book.CQI can indicate the channel status of some included in the channel status of full range band and/or full range band frequency bands.
Fig. 2 is illustrated in the structure of the radio frame among the 3GPP LTE.Radio frame comprises 10 subframes.A subframe comprises two time slots.The time that is used to send a subframe is defined as Transmission Time Interval (TTI).For example, a subframe can have the length of 1 millisecond (ms), and a time slot can have 0.5 millisecond length.A time slot comprises a plurality of SC-FDMA symbols (for example, 7 SC-FDMA symbols) in time domain, and comprises a plurality of Resource Block (RB) in frequency domain.In up link, use among the 3GPP LTE of SC-FDMA symbol symbol period of SC-FDMA symbolic representation.According to system, the SC-FDMA symbol also can be called as OFDMA symbol or symbol period.RB is a resource allocation unit, and comprises a plurality of continuous subcarriers in a time slot.
The structure of radio frame only is shown for exemplary purpose.Therefore, can revise the quantity of SC-FDMA symbol included in the quantity of time slot included in the quantity of subframe included in the radio frame or the subframe or the time slot in every way.
Fig. 3 illustrates the exemplary configurations of downlink subframe.This subframe comprises two continuous slots.Maximum three the OFDM symbols of front portion of first time slot that are arranged in this downlink subframe are corresponding to the control area that will be assigned with physical downlink control channel (PDCCH).Remaining OFDM symbol is corresponding to the data area that will be assigned with physical down link sharing channel (PDSCH).On an OFDM symbol of subframe, send physical control format indicator channel (PCFICH), and physical control format indicator channel (PCFICH) carries and the relevant information of OFDM symbol quantity that is used for sending in subframe PDCCH.
The permission of PDCCH carries downlink, the resource allocation of the downlink transmission of this down link permission report on PDSCH.More specifically, startup of the paging information on transformat that PDCCH can carries downlink shared channel (DL-SCH) and resource allocation, the paging channel (PCH), the system information on the DL-SCH, resource allocation, transmission power control commands, internet protocol voice (VoIP) etc. such as the Advanced Control message of the accidental access response that on PDSCH, sends.And PDCCH can carry the up link permission, and this up link permission is to the resource allocation of UE reporting uplink link transmission.PCFICH is used for the quantity of the OFDM symbol of PDCCH to the UE report, and sends PCFICH in each subframe.Physical mixed ARQ indicator channel (PHICH) is the response of ul transmissions, and carrying HARQ affirmative acknowledgement (ACK)/negative response (NACK) signal.
Fig. 4 is illustrated in the structure of the uplink sub-frames among the 3GPP LTE.
Referring to Fig. 4, uplink sub-frames can be divided into control area and data area in frequency domain.The control area is assigned with the physical uplink control channel that is used for carrying uplink control information (PUCCH).The data area is assigned with to be used for the physical uplink link sharing channel (PUSCH) of carrying user data.In order to keep single carrier property, a UE does not send PUCCH and PUSCH simultaneously.
The RB that the PUCCH that is used for a UE is assigned to subframe is right.The right RB that belongs to this RB takies the different sub carrier in corresponding two time slots.This be called as distribute to PUCCH RB to frequency hopping on boundary of time slot.
Fig. 5 illustrates uplink HARQ and CQI transmission.
Referring to Fig. 5, in case on PDSCH, receive uplink data 100 from UE, BS in the past on PHICH, send ack/nack signal 101 behind the special time for uplink data 100.When receiving uplink data 100, BS can send PHICH in the back in the past in the time corresponding to 4 TTI.Yet, the invention is not restricted to this.If decode uplink data successfully, then ack/nack signal 101 is ack signals.If decode uplink data successfully not, then ack/nack signal 101 is NACK signals.When ack/nack signal 101 is confirmed as the NACK signal, the retransmission data 110 retransmitted BS that give of uplink data 100.Can carry out repeating transmission up to receiving ack signal, maybe can carry out to retransmit to reach and attempt the corresponding number of times of number with repeating transmission.When the ack/nack signal 111 that is used for retransmission data 110 was confirmed as ack signal, UE can send new uplink data 120 to BS.
Can dynamically report the resource allocation or the transmission time points of the ack/nack signal that is used for the uplink/downlink data or the resource allocation or the transmission time points of the ack/nack signal that can be intended for the uplink/downlink data by signaling by BS according to the resource allocation or the transmission time points of uplink/downlink data.
UE can downlink channel status be come periodically and/or CQI is reported to BS in aperiodicity ground by measuring.When periodically reporting CQI, this means to send CQI and need not receive additional requests from BS according to predetermined period or by the cycle that BS determines.When aperiodicity ground report CQI, this means in response to sending CQI from the request of BS.Can on PUCCH or PUSCH, send CQI.When CQI and data multiplex, always on PUSCH, send CQI.CQI 180 and 184 is sent separately, and can be sent out on PUCCH or PUSCH.CQI182 is sent out with uplink data, and can only be sent out on PUSCH.The CQI that sends on PUSCH can be periodicity CQI or aperiodicity CQI.BS can use CQI to carry out downlink scheduling.
In the following description, uplink HARQ will be described.Yet technical characterictic of the present invention will easily be applied to downlink HARQ by those of ordinary skills.
Fig. 6 is illustrated in the dynamic dispatching in the ul transmissions.
Referring to Fig. 6, for ul transmissions, UE sends dispatch request (SR) to BS on PUCCH.When UE request BS distributes uplink radio resources, use SR.SR is a kind of preliminary information exchange that is used for exchanges data.For UE sends uplink data to BS, at first by using SR to ask radio resources allocation.In response to SR, BS sends the up link permission to UE on PDCCH.The up link permission comprises the distribution of uplink radio resources.UE sends uplink data by using the uplink radio resources that is distributed on PUSCH.
Fig. 7 is illustrated in the data on the PUSCH and the multiplexing exemplary diagram of control information.PUSCH carries data and/or control information by the Resources allocation of using the up link permission.
Referring to Fig. 7, provide data bit a for each TTI so that the form of a transmission block is next
0, a
1..., a
A-1At first, to data bit a
0, a
1..., a
A-1Additional cycles redundancy check (CRC) parity bits p
0, p
1..., P
L-1, to produce the bit b that has added CRC
0, b
1..., b
B-1(step 200).At this, B=A+L.Following equation 1 illustrates a
kAnd b
kBetween relation.
[mathematical expression 1]
b
k=a
k| for k=0,1 ..., A-1|
b
k=p
K-AFor k=A, A+1 ..., A+L-1|
With code block (code block) is that unit is to having added the bit b of CRC
0, b
1..., b
B-1Do segmentation, and, be the additional again CRC parity bits (step 210) of unit with the code block.c
R0, c
R1..., c
R (Kr-1)Be illustrated in the bit sequence of exporting after this code block segmentation.At this, if the sum of code block is C, then r represents the code block numbering, and Kr represents to be used for the bit number of code block numbering r.
For given code block, on bit sequence, carry out chnnel coding (step 220).d
(i) 0, d
(i) 1..., d
(i) D-1The bit of presentation code, D are represented the number of coded bits of each output stream, and i represents from the label of the bit stream of encoder output.
Bit for coding is carried out rate-matched (step 230).Then, for bit run time version piece serial connection (step 240) through rate-matched.Like this, produce sequence of data bits f
0, f
1..., f
G-1At this, G represents to be used for sending and is different from when multiplexing control information on PUSCH the sum of the coded-bit of the bit of employed bit in the control information transmission.
Control information can be re-used with data.Data and control information can be used different encoding rates by the coded identification that branch is used in the varying number of its transmission.Below, CQI is taken as control information.
For CQI value o
0, o
1..., o
O-1(wherein, O is the quantity of CQI bit) carries out chnnel coding, to produce control information bit sequence q
0, q
1..., q
Q-1(step 260).CQI can use the independent channel coding different with the chnnel coding that is used for data.For example, when with block code (block code) (32, when O) being used as chnnel coding to CQI, basic sequence M
I, nAs shown in table 1 below.
[table 1]
| i | M i，0 | M i，1 | ?M i，2 | ?M i，3 | M i，4 | M i，5 | M i，6 | M i，7 | M i，8 | M i，9 | M i，10 |
| 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
| 2 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 1 | 1 |
| 3 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 1 |
| 4 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 1 |
| 5 | 1 | 1 | 0 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 1 |
| 6 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 1 |
| 7 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 1 |
| 8 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 1 | 0 | 1 | 1 |
| 9 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 1 |
| 10 | 1 | 0 | 1 | 0 | 0 | 1 | 1 | 1 | 0 | 1 | 1 |
| 11 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 1 |
| 12 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 1 |
| 13 | 1 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | 1 |
| 14 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 1 |
| 15 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 1 |
| 16 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 0 |
| 17 | 1 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 0 |
| 18 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
| 19 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 |
| 20 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 |
| 21 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
| 22 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 |
| 23 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 1 |
| 24 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 0 |
| 25 | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 1 |
| 26 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 1 | 0 |
| 27 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 0 |
| 28 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | 0 | 0 |
| 29 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 |
| 30 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 31 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
b
0, b
1..., b
31Expression is used for the intermediate sequence of CQI chnnel coding, and can be produced by following equation 2.
[mathematical expression 2]
According to following equation 3 by repeating this intermediate sequence b circularly
0, b
1..., b
31Produce control information bit sequence q
0, q
1..., q
Q-1
[mathematical expression 3]
q
i=b
(imod31), wherein, i=0,1 ..., Q-1
Produce sequence of data bits f as mentioned above
0, f
1..., f
G-1, and with itself and control information bit sequence q
0, q
1..., q
Q-1Be multiplexed with multiplexed sequence g together
0, g
1..., g
H-1(step 270).In multiplexing process, can at first arrange control information bit sequence q
0, q
1..., q
Q-1, thereafter can layout data bit sequence f
0, f
1..., f
G-1That is, if H=G+Q then can dispose [g
0, g
1..., g
H-1] such as being [q
0, q
1..., q
Q-1, f
0, f
1..., f
G-1].
Through multiplexing sequence g
0, g
1..., g
H-1Be mapped as modulation sequence h
0, h
0..., h
H '-1(step 280).At this, h
iModulation symbol on the expression planisphere, and H '=H/Q
mQ
mExpression is used for the bit number of each modulation symbol of modulation scheme.For example, when Quadrature Phase Shift Keying (QPSK) when being used as modulation scheme, Q
m=2.
Modulation sequence h
0, h
0..., h
H '-1Each modulation symbol be mapped to the resource element (resource element) (step 290) that is used for PUSCH.This resource element is the allocation unit on subframe, and this subframe limits with a SC-FDMA symbol (or OFDMA symbol) and a subcarrier.Mode with time priority is shone upon modulation symbol.Fig. 8 is illustrated in the resource mapping on the PUSCH.A time slot comprises 7 SC-FDMA symbols.In each time slot, the 4th SC-FDMA symbol is used to send reference signal.Therefore, in a subframe, reach 12 SC-FDMA symbols and can be used to PUSCH.Modulation sequence h
0, h
0..., h
H '-1At first on SC-FDMA symbol direction, be mapped in the first subcarrier zone, also on SC-FDMA symbol direction, be mapped in the second subcarrier zone then.Modulation sequence h
0, h
0..., h
H '-1The front portion corresponding to CQI.Therefore, at first CQI is mapped to resource element in preceding subcarrier zone.
As mentioned above, in order on PUSCH, to send CQI, need at first to determine to send CQI resource needed amount.Determine stock number based on the transmission parameter that in CQI transmission, uses (for example, MCS etc.).The transmission parameter that is used for CQI represents to be used for the CQI transmission parameters, and comprises the various parameters that are used for determining MCS and/or stock number.If the quantity Q ' of the modulation symbol by being used for CQI expresses stock number, then can determine Q ' by following equation 4.
[mathematical expression 4]
In equation 4, O represents the quantity of CQI bit, and L represents the quantity of CRC bit, and Δ is represented parameter, and C represents the sum of code block, and Kr represents to be used for the quantity that code block is numbered the bit of r, M
ScBe illustrated in the quantity of the subcarrier that uses in the PUSCH transmission, and N
SymbBe illustrated in the quantity of the SC-FDMA symbol that uses in the PUSCH transmission.Be used for determining that the transmission parameter of above-mentioned Q ' can be C, Kr, M
ScAnd N
SymbIn at least one.
Now, a kind ofly be used at the multiplexing retransmission data of process of carrying out HARQ and CQI and send multiplexing result's method by PUSCH describing.
When carrying out HARQ, can be by with CQI and primary data or the multiplexing CQI that sends of retransmission data.When this situation can the CQI transmission cycle overlaps (coincide) with repetition cycle in periodic CQI report or generation when in acyclic CQI reports, transmitting request responding and overlap with repetition cycle for CQI.
When with CQI and retransmission data when multiplexing, there is problem about the transmission parameter that how to be identified for CQI (for example, MCS etc.).This problem relates to the transmission parameter that how to be identified for the multiplexing CQI of retransmission data.Even this is that the report of transmission parameter can be used as signaling consumption because also need be by BS when UE reports the transmission parameter that is used for the CQI transmission in addition when retransmitting.
If when retransmission data, send CQI, then can determine the CQI transmission parameter according to the transmission parameter that in initial data transfer, uses.For example, when retransmission data, the MCS that uses in initial data transfer is used to the CQI transmission.
Fig. 9 illustrates the flow chart of HARQ method according to an embodiment of the invention.
Referring to Fig. 9, in step S510, BS sends the initial uplink permission on PDCCH.In the HARQ method, this initial uplink permission comprises the radio resource allocation information that is used for the initial uplink data.At step S520, UE sends uplink data on the PUSCH by initial uplink permission indication.
In step S530, when detecting the decoding error of uplink data, BS sends the NACK signal as re-send request may.Can on PHICH, send the NACK signal.
In step S560, if the transmission subframe of retransmission data overlaps with the transmission subframe of CQI, then UE determines the transmission parameter of CQI from the initial uplink permission.This transmission parameter is the parameter that is used for determining to send the needed amount of radio resources of CQI, and can be relevant with the MCS of CQI.For example, when determining the amount of radio resources of CQI, can obtain transmission parameter C, Kr, M from the initial uplink permission by equation 4
ScAnd N
SymbAt least one.
In step S570, UE is by using the retransmission data of multiplexing CQI of transmission parameter and uplink data.In step S580, UE sends multiplex data on PUSCH.
In HARQ retransmits, when retransmission data is sent with CQI, permit to determine the MCS of CQI according to initial uplink, be not used in the other signaling of the transmission parameter of the CQI that is re-used so that can reduce signaling consumption.
Figure 10 illustrates the flow chart of HARQ method in accordance with another embodiment of the present invention.
Referring to Figure 10, in step S610, BS sends the initial uplink permission on PDCCH.In step S620, UE sends uplink data on the PUSCH by initial uplink permission indication.In step S630, when detecting the decoding error of uplink data, BS sends the NACK signal as re-send request may.
In step S640, BS sends on PDCCH and retransmits permission.This repeating transmission permission comprises the radio resource allocation information that is used for the retransmission data relevant with uplink data.
In step S650, if the transmission subframe of retransmission data overlaps with the transmission subframe of CQI, then UE determines the transmission parameter of CQI from the initial uplink permission.In step S670, UE comes the repeating transmission of multiplexing CQI and uplink data by using this transmission parameter.In this case, use from the transmission parameter of retransmitting the permission acquisition and come multiplexing retransmission data, and use the transmission parameter that obtains from initial permission to come multiplexing CQI.In step S680, UE sends multiplex data on PUSCH.
Figure 11 illustrates the flow chart of HARQ method in accordance with another embodiment of the present invention.
Referring to Figure 11, in step S700, BS configuration cycle property CQI.UE periodically sends CQI according to the cycle of being determined by BS.In step S710, BS sends the initial uplink permission on PDCCH.In the HARQ method, the initial uplink permission comprises the radio resource allocation information that is used for the initial uplink data.In step S720, UE sends uplink data on the PUSCH by initial uplink permission indication.
In step S730, UE presses the CQI transmission cycle and sends CQI.In this case, if there is available PUCCH resource, then can on PUCCH, send CQI.In step S740, when detecting the decoding error of uplink data, BS sends the NACK signal as re-send request may.
In step S760, if the transmission subframe of retransmission data overlaps with the transmission subframe of CQI, then UE determines the transmission parameter of CQI from the initial uplink permission.
In step S770, UE comes the retransmission data of multiplexing CQI and uplink data by using this transmission parameter.In step S780, UE sends multiplex data on PUSCH.
Figure 12 illustrates the flow chart of HARQ method in accordance with another embodiment of the present invention.
Referring to Figure 12, in step S810, BS sends the initial uplink permission on PDCCH.In step S820, UE sends uplink data on the PUSCH by initial uplink permission indication.In step S830, when detecting the decoding error of uplink data, BS sends the NACK signal as re-send request may.
In step S840, BS sends permission and the CQI request of retransmitting on PDCCH.The CQI request is optionally to be made by BS to be used for asking UE to send the signal of CQI.Though on PDCCH, send the CQI request, can send the CQI request to UE by other message with retransmitting permission.
In step S860, UE determines the transmission parameter of CQI from the initial uplink permission according to the CQI request of BS.In step S870, UE comes the repeating transmission of multiplexing CQI and uplink data by using this transmission parameter.In this case, use from the transmission parameter of retransmitting the permission acquisition and come multiplexing retransmission data, and use the transmission parameter that obtains from initial permission to come multiplexing CQI.In step S880, UE sends multiplex data on PUSCH.
Though the CQI that has proposed in the above-described embodiments when first retransmits is multiplexing,, also can obtain the CQI transmission parameter from the initial uplink permission even send CQI by multiplexing CQI when n retransmits (wherein, n＞1).
By using the transmission parameter that in initial data transfer, uses to be used as the CQI transmission parameter, do not need to be used for the other signaling of CQI transmission parameter.
When carrying out HARQ,, can not only obtain the CQI transmission parameter from the initial uplink permission but also from other permissions for multiplexing on PUSCH and transmission retransmission data and CQI.For example, can be the CQI transmission parameter with the transmission parameter settings that is used for the multiplexing retransmission data of CQI.This is the identical MCS that is used for retransmission data is used to send CQI when retransmitting a situation.For another example, the transmission parameter that uses in formerly transmitting can be used as the CQI transmission parameter.This is that the transmission parameter settings that will be used for first retransmission data is the situation of CQI transmission parameter when multiplexing second retransmission data and CQI when second retransmits.
As mentioned above, under the request of BS, send acyclic CQI.Usually, can on PDCCH, send the CQI request.In this case, can send the transmission indicator that is used for the CQI transmission parameter with the CQI request.Can use the resource (or transmission parameter) of distributing to send CQI according to this transmission indicator, maybe can use the resource (or transmission parameter) of previous distribution to send CQI.
Figure 13 is the block diagram that the equipment that is used for radio communication according to an embodiment of the invention is shown.The equipment 50 that is used for radio communication can be the part of UE.The equipment 50 that is used for radio communication comprises processor 51, memory 52, radio frequency (RF) unit 53, display unit 54 and user interface elements 55.RF unit 53 is coupled to processor 51, and sends and/or receive radio signals.Memory 52 is coupled to processor 51, and storage operating system, application program and generic-document.Display unit 54 shows the multiple information of UE, and can use known elements, such as LCD (LCD), Organic Light Emitting Diode (OLED) etc.Can come configuration user interfaces unit 55 with combination such as the known user interface of keypad, touch-screen etc.Processor 51 is supported HARQ and AMC.Processor 51 can dispose PUCCH or PUSCH, and can carry out the multiplexing of data and CQI.Can realize the foregoing description of HARQ method by processor 51.
Can use hardware, software or its to make up and realize the present invention.In the hardware execution mode, can use the one of the following that is designed to carry out above-mentioned functions to realize the present invention: application-specific integrated circuit (ASIC) (ASIC), digital signal processor (DSP), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microprocessor, other electronic units and combination thereof.In the software implementation mode, can use the module that is used to carry out above-mentioned functions to realize the present invention.Software can be stored in the memory cell, and is carried out by processor.Well known to a person skilled in the art that various devices can be used as this memory cell or this processor.
Though specifically illustrate and described the present invention with reference to exemplary embodiment of the present invention, but those skilled in the art can understand, under the situation that does not depart from the spirit and scope of the present invention that are defined by the claims, can carry out the various changes on form and the details therein.Should only consider exemplary embodiment, rather than it is thought of as the purpose that is used to limit with illustrative meaning.Therefore, scope of the present invention is not limited by detailed description of the present invention, but is limited by claim, and all differences in such scope will be interpreted as being included among the present invention.
Claims (15)
1. method of in wireless communication system, support mixing automatic repeat requests (HARQ), described method comprises:
On downlink channel, receive the initial uplink permission;
Use described initial uplink permission on uplink channel, to send uplink data;
Reception is for the request of retransmitting described uplink data;
Determine at least one transmission parameter of CQI (CQI) from described initial uplink permission;
The retransmission data and the described CQI of described uplink data is multiplexing, wherein, be identified for the stock number of the transmission of described CQI based on described at least one transmission parameter; And,
On described uplink channel, send multiplexing data.
2. method according to claim 1 further comprises:
Reception is used for the repeating transmission up link permission of the repeating transmission of described uplink data,
Wherein, by using described repeating transmission up link permission to come the retransmission data of multiplexing described uplink data.
3. method according to claim 2 wherein, comprises the request that is used to report described CQI in described repeating transmission up link permission.
4. method according to claim 1, wherein, by using described initial uplink permission, the retransmission data of multiplexing described uplink data.
5. method according to claim 1, wherein, described downlink channel is physical downlink control channel (PDCCH).
6. method according to claim 1, wherein, described uplink channel is a physical uplink link sharing channel (PUSCH).
7. method according to claim 1, wherein, at least one transmission parameter of described CQI is relevant with encoding scheme (MCS) with the modulation of described CQI.
8. method according to claim 1 wherein, is determined at least one transmission parameter of described CQI, makes that the MCS of described CQI is identical with the MCS of described uplink data.
9. method according to claim 1 further comprises:
Reception is used for the periodically CQI transmission cycle of CQI report.
10. equipment that is used for radio communication comprises:
Radio frequency (RF) unit is used for sending and receiving radio signals; And,
Processor, itself and described RF unit are coupled, and are configured to:
On downlink channel, receive the initial uplink permission;
Use described initial uplink permission on uplink channel, to send uplink data;
Reception is for the request of retransmitting described uplink data;
Determine at least one transmission parameter of CQI from described initial uplink permission;
The retransmission data and the described CQI of described uplink data is multiplexing, wherein, be identified for the stock number of the transmission of described CQI based on described at least one transmission parameter; And
On described uplink channel, send multiplexing data.
11. equipment according to claim 10, wherein, described processor is configured to receive the repeating transmission up link permission of the repeating transmission that is used for described uplink data, and by using described repeating transmission up link permission to come the retransmission data of multiplexing described uplink data.
12. equipment according to claim 11 wherein, comprises the request that is used to report described CQI in described repeating transmission up link permission.
13. equipment according to claim 10, wherein, by using described initial uplink permission, the retransmission data of multiplexing described uplink data.
14. equipment according to claim 10, wherein, at least one transmission parameter of described CQI is relevant with encoding scheme (MCS) with the modulation of described CQI.
15. equipment according to claim 10 wherein, is determined at least one transmission parameter of described CQI, makes that the MCS of described CQI is identical with the MCS of described uplink data.
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| CN201410102983.XA CN103973422B (en) | 2008-02-03 | 2009-02-02 | For the method and user equipment for supporting to retransmit in a wireless communication system |
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| US61/025,811 | 2008-02-03 | ||
| KR1020080128471A KR101558571B1 (en) | 2008-02-03 | 2008-12-17 | Method and apparatus of supporting harq |
| KR10-2008-0128471 | 2008-12-17 | ||
| PCT/KR2009/000499 WO2009096752A1 (en) | 2008-02-03 | 2009-02-02 | Method and apparatus for supporting harq |
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| CN109314910A (en) * | 2016-04-01 | 2019-02-05 | 华为技术有限公司 | For exempting from the HARQ system and method for authorization uplink |
| US10868640B2 (en) | 2016-04-01 | 2020-12-15 | Huawei Technologies Co., Ltd. | HARQ systems and methods for grant-free uplink transmissions |
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| CN110073627B (en) * | 2016-11-03 | 2022-06-03 | 诺基亚技术有限公司 | UCI transmission in a communication system |
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Also Published As
| Publication number | Publication date |
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| CN101933282B (en) | 2014-04-16 |
| KR20090084996A (en) | 2009-08-06 |
| CN103973422B (en) | 2017-07-28 |
| KR101558571B1 (en) | 2015-10-08 |
| JP2011511547A (en) | 2011-04-07 |
| CN103973422A (en) | 2014-08-06 |
| JP5044025B2 (en) | 2012-10-10 |
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