CN101895993A - Channel multiplexing and mapping method and device - Google Patents
Channel multiplexing and mapping method and device Download PDFInfo
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Abstract
The invention provides a channel multiplexing and mapping method and a channel multiplexing and mapping device, which are applied to the multiplexing and mapping of a relay link-physical hybrid automatic repeat request indicator channel (R-PHICH) and a direct link-physical hybrid automatic repeat request (HARQ) indicator channel (PHICH). The method and the device simply realize the multiplexing and the mapping of the R-PHICH and the PHICH by repeatedly encoding and modulating a single data flow or the multi-data flow feedback information of an uplink service, spreading spectrums of repeatedly encoded and modulated signals according to a preset spectrum spreading factor and mapping corresponding control channel resources in a time direction and a frequency direction after the spectrum spreading. The method and the device meet the requirements of B3G/4G research targets well and solve the problem of multi-data flow feedback acknowledgement information. Meanwhile, the method has the advantage of ensuring the backward compatibility (compatibility with an LTE system).
Description
Technical field
The present invention relates to the automatic retransmission technique of physical mixed, especially the method and the device that refer to a kind of channel multiplexing and mapping, be applicable to the automatic repeat requests indicating channel of the physical mixed (R-PHICH of repeated link, Relay link-Physical Hybrid Automatic Repeat Request Indicator Channel) and the Physical HARQ Indicator Channel of the link that direct transfers (PHICH, Physical Hybrid Automatic Repeat Request Indicator Channel) multiplexing and mapping.
Background technology
At OFDM (OFDM, Orthogonal Frequency Division Multiplexing) in the system, owing to adopt the data mode of time-frequency bidimensional, therefore, multiplexed form between control channel and the Traffic Channel can be on the time orientation with frequency direction on, promptly adopt time division multiplexing (TDM, Time Division Multiplex) mode and frequency division multiplexing (FDM, Frequency Division Multiplex) mode.
At present, Long Term Evolution (LTE, Long Term Evolution) system, senior Long Term Evolution (LTE-A, Long Term Evolution Advanced) system and senior international mobile communication system (IMT-Advanced, International Mobile Telecommunication Advanced) all are the systems based on the OFDM technology.In ofdm system, in order to save subscriber equipment (UE, User Equipment) power consumption, control channel adopts the TDM mode usually, that is to say that control channel and Traffic Channel are separated in time, 14 OFDM symbols are for example arranged in a subframe, preceding 1 or 2 or 3 or 4 OFDM symbol is as control channel, and 13 or 12 or 11 or 10 the OFDM symbols in back are as Traffic Channel.
Control channel with present LTE system is an example, and descending control signaling mainly comprises in the LTE system:
1) Physical Control Format Indicator Channel (PCFICH, Physical Control Format Indicator Channel);
2) descending scheduling mandate (DL grant, DownLink grant) information;
3) uplink scheduling authorization (UL grant, UpLink grant) information;
4) Physical HARQ Indicator Channel (PHICH, Physical Hybrid Automatic Repeat Request Indicator Channel), wherein HARQ is the abbreviation that mixes automatic request retransmission.
From above-mentioned the LTE system descending control signaling composition as can be seen, control channel is to be made of different parts, each part all has its specific function.For convenience of description, define several terms and agreement herein:
1) be called control channel subcarrier (CCE, Control channels elements) at the continuous L of a frequency domain subcarrier, CCE can comprise DL grant information and UL grant information;
2) indicating several OFDM symbols to be used for control channel is PCFICH, independent with CCE; PHICH is also independent with CCE;
3) all CCE are the QPSK modulation;
4) each control channel is made of a CCE, or CCE constitutes;
5) each UE can monitor a series of candidate control channels;
6) number of candidate control channel is the maximum times of blind Detecting;
7) number of candidate control channel is greater than the number of CCE;
8) transmitting-receiving two-end several combinations of having made an appointment for example have only 1,2,4,8 CCE to combine as the candidate control channel;
9) the corresponding different respectively code rate of 1,2,4,8 combinations;
10) Resource Block is meant and takies experimental process carrier wave (such as 12 subcarriers) on frequency direction, takies whole OFDM symbols of a time slot or a subframe on time orientation; Frequency resource is meant the centralized or distributed experimental process carrier wave in the OFDM symbol, such as 12 subcarriers.Fig. 1 is the schematic diagram that concerns of Resource Block, subcarrier and frequency resource, and as shown in Figure 1, each lattice is represented a Resource Block, and diagonal line hatches is represented subcarrier, and the lattice of lattice shade is represented frequency resource.
(eNB) side in the base station is carried out chnnel coding to the control information of each UE respectively, carries out QPSK modulation then, carry out CCE to the mapping of RE, carry out Fourier and after (IFFT) conversion, launch.Suppose that this moment, control channel was made of 32 CCE, after receiving terminal carries out Fourier (FFT) conversion, UE from be combined as 1 CCE begin to carry out blind Detecting (promptly respectively to CCE0, CCE1 ..., CCE31 carries out blind Detecting), if monitoring, user terminal identification (UE_ID) successfully promptly do not listen to the UE_ID that is complementary with self, then from be combined as 2 CCE carry out blind Detecting (promptly respectively to [CCE0 CCE1], [CCE2 CCE3] ..., [CCE30 CCE31]), and the like carry out blind Detecting.If in whole blind detection process, all do not listen to the UE_ID that is complementary with self ID, illustrating does not have one's own control signaling to assign this moment, and then UE switches to sleep pattern; If listen to the UE_ID that is complementary with self ID, then according to the corresponding business information of control signal demodulation.
The transmission of PHICH in the LTE system is organized with the form of PHICH group, need determine concrete feedback information resource index according to PHICH group index (PHICH group index) and cyclic shift index (Cyclic Shift index).The production process of PHICH is: the feedback information repeated encoding of 1bit uplink service correspondence is become 3bits information, carry out the BPSK modulation, spread processing and many antenna processing, wherein, situation spreading factor for normal (normal) Cyclic Prefix (CP, Cyclic Prefix) adopts 4; And adopt 2 for the situation spreading factor of extended cyclic prefix (extended CP), and adopt I/Q multiplexing, so 3 resource element group (REG, resource element group) feedback information that can multiplexing 8 UEs, per 4 of constellation symbol is divided into one group, a corresponding respectively REG also is mapped to (k ', l ')
i, adopt formula (1)～(3) to shine upon:
On time orientation:
Based on normal PHICH duration (normal PHICH duration), on frequency direction:
Based on the PHICH duration (extended PHICH duration) of expansion, on frequency direction:
In above-mentioned formula (1)～(3), m ' is the map unit index, n
L 'Be the direct transfer interior REG quantity that is not taken of OFDM symbol l ' of Physical Downlink Control Channel (PDCCH) of link of carrying by PCFICH, k ' and l ' represent not frequency direction index and the time orientation index of the REGs that taken by PCFICH and PHICH respectively, i is the REG sequence number (i=0 that PHICH comprises, 1,2).
Here be example with the normal PHICH duration, illustrate that computational methods are as follows, the account form of other situations in like manner.
Utilize being calculated as of formula on the time orientation: according to formula (1), normal PHICH is during the duration, l '
i=0, promptly PHICH only is mapped in the 0th the OFDM symbol;
As formula (2), utilize being calculated as of formula on the frequency direction:
The original position of the 1st REG,
Round downwards, add the result of m ' after, to n
L 'Ask mould, obtain
The original position of the 2nd REG,
Round downwards, add
The result after, to n
L 'Ask mould, obtain
The original position of the 3rd REG,
Round downwards, add
The result to n
L 'Ask mould, obtain
The goal in research of B3G/4G is to compile connecting systems such as honeycomb, fixed wireless access, nomadic, radio area network, in conjunction with complete IP network, being respectively the user under high speed and low speed mobile environment provides peak rate to reach the wireless transmission capability of 100Mbps and 1Gbps, and realize the seamless connection of cellular system, regional wireless network, broadcasting, telstar communication, make the mankind realize that anyone realizes communicating by letter of any way with all other men at any time and any place.In order to reach this purpose, relaying (Relay) technology can be used as effective measures, and like this, the covering that via node (RN, Relay Node) both can increase the sub-district also can increase cell capacity.
In adopting band during relaying (inband-relay), promptly eNB to relay link and relay to the UE link operation on identical frequency resource.Because the relay launching opportunity produces interference (self-interference) to the receiver of self in the band, so eNB on identical frequency resource is impossible with RN simultaneously to the UE link to the RN link, unless enough Signal Separation and isolation between antennas are arranged.Similar, RN also can not launch data to eNB when receiving the data that UE launched.
According to the regulation in the present LTE system, 1 10ms radio frames (frame) is made of the subframe (subframe) of 10 1ms, can comprise clean culture (Unicast) and multicast and broadcast (Multicast Broadcast), wherein, at Frequency Division Duplexing (FDD) (FDD, Frequency Division Duplex) during mode, #0, #5 subframe be as the emission synchronizing signal, and #4, #9 subframe are as paging (paging); When time division duplex (TDD, TimeDivision Duplex) mode, #0, #5 subframe be as the emission synchronizing signal, and #1, #6 subframe are as paging.That is to say, for the FDD mode, { #0, #4, #5, #9} subframe, the TDD mode, { #0, #1, #5, #6} subframe have above-mentioned special purpose, the subframe of these special purposes can not be used for the distribution of Multicast Broadcast Single Frequency Network (MBSFN, Multicast Broadcast Single Frequency Network) subframe, and promptly assignable MBSFN subframe mostly is 6 subframes most in 1 radio frames.
In order to solve the transmitting-receiving interference problem, a kind of possible implementation method is when RN receives data from eNB, do not carry out firing operation to UE, that is to say, behind the UE link, need to increase gap (gap) at RN, be used for Relay subframe, make UE in the gap time range, not carry out any reception/firing operation by configuration MBSFN subframe, and RN finishes the switching that is transmitted into reception in the gap time range, switches after finishing in the data of the OFDM of back symbol reception from eNB.Wherein, in LTE, adopt MBSFN subframe to be used for relay subframe, present specific implementation is: multimedia controlled entity (MCE, MBMS Control Entity) at first to the available MBSFN subframe of eNB configuration, eNB is the available relay subframe of configuration in these available MBSFN subframe again.Therefore, when descending, RN at first gives its subordinate's UE emission control information (feedback information (ACK/NACK, Acknowlegment/Negative Acknowlegment) and uplink authorization (UL grant) information that comprise up emission data at preceding 1 or 2 OFDM symbol.
Because when descending, RN at first gives its subordinate's UE emission control information at preceding 1 or 2 OFDM symbol, and eNB is to the RN UE emission control information that direct transfers at preceding 1 or 2 or 3 or 4 OFDM symbol, therefore, RN can't receive eNB to the control information of RN link in preceding 1 or 2 OFDM symbol.
At present, in the LTE of 3GPP, LTE-A system, is a focus for MBSFN subframe as the research of relay subframe, but, the method that eNB is multiplexing to the automatic repeat requests indicating channel of the physical mixed of the repeated link of RN and shine upon is not also proposed at present, with the demand of the goal in research that adapts to B3G/4G; And eNB is to the direct transfer method of the multiplexing and mapping of the automatic repeat requests indicating channel of physical mixed of link of UE, only relate to single data stream, the application scenarios of BPSK modulation system, can not be applicable to dual data stream, even the application scenarios of multiple data stream, so the demand of the goal in research that eNB method multiplexing to the automatic repeat requests indicating channel of the physical mixed of UE and mapping can not flexible adaptation B3G/4G.
Summary of the invention
In view of this, main purpose of the present invention is to provide the method for a kind of channel multiplexing and mapping, can adapt to the demand of the goal in research of B3G/4G.
Another object of the present invention is to provide the device of a kind of channel multiplexing and mapping, can adapt to the demand of the goal in research of B3G/4G.
For achieving the above object, technical scheme of the present invention is achieved in that
The method of a kind of channel multiplexing and mapping, this method comprises:
Single data stream or multiple data stream feedback information to uplink service carry out repeated encoding and modulation treatment;
According to the spreading factor that sets in advance to through repeated encoding and the modulation after signal carry out spread processing;
Control channel resource corresponding behind the spread spectrum is carried out on the time orientation and the mapping on the frequency direction.
Described channel is the automatic repeat requests indicating channel of the physical mixed of repeated link R-PHICH, or the Physical HARQ Indicator Channel PHICH of the link that direct transfers.
Described single data stream or multiple data stream feedback information are bit level information.
Described modulation treatment is BPSK modulation, QPSK modulation or 16QAM modulation.
The number of times of described repeated encoding is 2 times or 3 times or 4 times.
Described 2 or 4 times of spread spectrums, perhaps 3 times of spread spectrums of spreading to.
Described mapping on time orientation comprises: normal R-PHICH or PHICH duration, and the R-PHICH of expansion or the mapping under PHICH duration two kinds of situations;
For there not being the base station to arrive the situation of the R-PCFICH/PCFICH of RN/UE link, on time orientation the normal R-PHICH/PHICH duration, described R-PHICH/PHICH continues an OFDM symbol;
For there being the base station to arrive the situation of the R-PCFICH/PCFICH of RN/UE link, shine upon according to following formula:
Wherein m ' is the map unit index, k ' and l ' represent not frequency direction index and the time orientation index of the resource element group REG that taken by Physical Control Format Indicator Channel PCFICH and R-PHICH/PHICH respectively, i is the REG sequence number (i=0,1,2) that R-PHICH/PHICH comprises.
The method of described mapping on frequency direction is:
For the continuous Resource Block or the situation of frequency resource, shine upon in according to the following equation;
For the discrete Resource Block or the situation of frequency resource, Resource Block or frequency resource that all are discrete are regarded continuous situation as, shine upon according to the following equation:
Based on the normal R-PHICH/PHICH duration, on frequency direction:
Based on the R-PHICH/PHICH duration of expansion, on frequency direction:
Wherein, m ' is the map unit index, n
L 'The interior REG quantity that is not taken of OFDM symbol l ' of Physical Downlink Control Channel R-PDCCH/PDCCH for the Physical Downlink Control Channel/link that direct transfers of carrying repeated link by R-PCFICH/PCFICH, k ' and l ' represent not frequency direction index and the time orientation index of the REG that taken by R-PCFICH/PCFICH and R-PHICH/PHICH respectively, i is the REG sequence number (i=0 that R-PHICH/PHICH comprises, 1,2);
n
L 'For the interior REG quantity that is not taken of the OFDM symbol l ' of R-PDCCH, less than being the interior REG quantity that is not taken of OFDM symbol l ' of PDCCH by R-PCFICH/PCFICH by R-PCFICH/PCFICH.
Described single data stream or multiple data stream feedback information carry out repeated encoding, modulation treatment and spread processing and are specially:
Adopt the single data stream ACK/NACK of repeated encoding 3 times, BPSK modulation, 2 or 4 times of spread spectrums, multiplexing 8 RNs/UEs of I+Q two-way for single data stream feedback, the effect of R-PHICH/PHICH group index and cyclic shift index with have now identical;
Perhaps, adopt the dual data stream ACK/NACK of repeated encoding 3 times, BPSK modulation, 2 or 4 times of spread spectrums, multiplexing 4 RNs/UEs of I+Q two-way for dual data stream feedback, at this moment, respectively corresponding 2 data flow of per 2 cyclic shift index, 4 cyclic shift index are effective;
Perhaps, adopt the dual data stream ACK/NACK of repeated encoding 3 times, BPSK modulation, 2 or 4 times of spread spectrums, multiplexing 8 RNs/UEs of I+Q two-way for dual data stream feedback, at this moment, respectively corresponding 2 data flow of per 2 R-PHICH/PHICH group indexes, 4 cyclic shift index are effective;
Perhaps, adopt the multiple data stream ACK/NACK of repeated encoding 3 times, BPSK modulation, 2 or 4 times of spread spectrums, multiplexing 2 RNsUEs of I+Q two-way for multiple data stream feedback, at this moment, respectively corresponding 4 data flow of per 4 cyclic shift index, 2 cyclic shift index are effective;
Perhaps, adopt the multiple data stream ACK/NACK of repeated encoding 3 times, BPSK modulation, 2 or 4 times of spread spectrums, multiplexing 8 RNs/UEs of I+Q two-way for multiple data stream feedback, at this moment, respectively corresponding 4 data flow of per 4 R-PHICH/PHICH group indexes, 2 cyclic shift index are effective;
Perhaps, adopt repeated encoding 2 times for the dual data stream feedback, QPSK modulation, 3 times of spread spectrums, the dual data stream ACK/NACK of multiplexing 6 RNs/UEs, at this moment, 1 respectively corresponding 2 data flow of QPSK constellation symbol;
Perhaps, adopt repeated encoding 3 times for the dual data stream feedback, QPSK modulation, 2 or 4 times of spread spectrums, the dual data stream ACK/NACK of multiplexing 4 RNs/UEs, at this moment, 1 respectively corresponding 2 data flow of QPSK constellation symbol;
Perhaps, adopt repeated encoding 4 times for the dual data stream feedback, QPSK modulation, 3 times of spread spectrums, the dual data stream ACK/NACK of multiplexing 3 RNs/UEs, at this moment, 1 respectively corresponding 2 data flow of QPSK constellation symbol.
Perhaps, adopt repeated encoding 2 times for the multiple data stream feedback, 16QAM modulation, 3 times of spread spectrums, the multiple data stream ACK/NACK of multiplexing 6 RNs/UEs, at this moment, 1 respectively corresponding 4 data flow of 16QAM constellation symbol;
Perhaps, adopt repeated encoding 3 times for the multiple data stream feedback, 16QAM modulation, 2 or 4 times of spread spectrums, the multiple data stream ACK/NACK of multiplexing 4 RNs/UEs, at this moment, 1 respectively corresponding 4 data flow of 16QAM constellation symbol;
Perhaps, adopt repeated encoding 4 times for the multiple data stream feedback, 16QAM modulation, 3 times of spread spectrums, the multiple data stream ACK/NACK of multiplexing 3 RNs/UEs, at this moment, 1 respectively corresponding 4 data flow of 16QAM constellation symbol.
When described 4 cyclic shift index effectively and when being 0,2,4,6, when emission cyclic shift index is 0 or 2 or 4 or 6 according to the cyclic shift index calculation feedback information resource index of emission; When emission cyclic shift index is 1 or 3 or 5 or 7, subtracts the value that obtains after according to the cyclic shift index of launching and calculate the feedback information resource index;
Perhaps, when described 4 cyclic shift index effectively and when being 1,3,5,7, when emission cyclic shift index is 1 or 3 or 5 or 7 according to the cyclic shift index calculation feedback information resource index of emission, when emission cyclic shift index is 0 or 2 or 4 or 6, adds the value that obtains after according to the cyclic shift index of launching and calculate the feedback information resource index;
Perhaps, when described 4 cyclic shift index effectively and when being 0,1,2,3, when emission cyclic shift index is 0 or 1 or 2 or 3 according to the cyclic shift index calculation feedback information resource index of emission, when emission cyclic shift index is 4 or 5 or 6 or 7, subtracts the value that obtains after four according to the cyclic shift index of launching and calculate the feedback information resource index;
Perhaps, when described 4 cyclic shift index effectively and when being 4,5,6,7, when emission cyclic shift index is 4 or 5 or 6 or 7 according to the cyclic shift index calculation feedback information resource index of emission, when emission cyclic shift index is 0 or 1 or 2 or 3, adds the value that obtains after four according to the cyclic shift index of launching and calculate the feedback information resource index;
When 2 cyclic shift index effectively and when being 0,4, when emission cyclic shift index is 0 or 4 according to the cyclic shift index calculation feedback information resource index of emission; When emission cyclic shift index is 1 or 5, subtracts one value according to the cyclic shift index of emission and calculate the feedback information resource index; When emission cyclic shift index is 2 or 6, calculate the feedback information resource index according to the value that the cyclic shift index of launching subtracts after two; When emission cyclic shift index is 3 or 7, calculate the feedback information resource index according to the value that the cyclic shift index of launching subtracts after three.
The device of a kind of channel multiplexing and mapping, this device comprises repeated encoding unit, modulating unit, spectrum-spreading unit and map unit, wherein,
The repeated encoding unit is used for the single data stream or the multiple data stream feedback information of uplink service are carried out repeated encoding, and coded message is sent to modulating unit;
Modulating unit is used for modulating from the coded message of repeated encoding unit, and modulation intelligence is sent to spectrum-spreading unit;
Spectrum-spreading unit stores the spreading factor of different spread spectrum modes, be used for the modulation intelligence that receives is carried out spread processing, and the multiplexed information that will obtain after will handling sends to map unit;
Map unit is used for the multiplexed information that receives is shone upon processing, obtains multiplexing of channel and map information.
Described modulating unit comprises the combination in any of BPSK modulation module, QPSK modulation module or 16AQM modulation module.
Described spectrum-spreading unit comprises 2 or 4 times of spread spectrum module, and/or 3 times of spread spectrum module.
The technical scheme that provides from the invention described above is applicable to the multiplexing of R-PHICH and PHICH and mapping as can be seen.The present invention by the single data stream of uplink service or multiple data stream feedback information are carried out repeated encoding and modulation treatment, according to the spreading factor that sets in advance to carrying out spread processing through the signal after repeated encoding and the modulation, and control channel resource corresponding behind the spread spectrum carried out having realized simply the multiplexing of R-PHICH and PHICH and mapping on the time orientation and the mapping on the frequency direction.The demand that has adapted to the goal in research of B3G/4G has well solved the problem of multi-data flow feedback acknowledgement.Simultaneously, the inventive method has guaranteed backwards compatibility (compatible LTE system).
Description of drawings
Fig. 1 is the schematic diagram that concerns of Resource Block, subcarrier and frequency resource;
Fig. 2 is the flow chart of the method for channel multiplexing of the present invention and mapping;
Fig. 3 is the composition structural representation of the device of channel multiplexing of the present invention and mapping.
Embodiment
Fig. 2 is the flow chart of the method for channel multiplexing of the present invention and mapping, as shown in Figure 2, comprising:
Step 200: single data stream or multiple data stream feedback information to uplink service carry out repeated encoding and modulation treatment.In this step, single data stream or multiple data stream feedback information are bit level information.
Modulation treatment can be BPSK modulation, QPSK modulation or 16QAM modulation etc.Repeated encoding is handled the reliability can improve feedback, the waste system resource but unlimited repeated encoding had not both had practical significance, and when modulating for BPSK, preferable repeated encoding number of times can be 3 inferior; Modulate for QPSK modulation and 16QAM, preferable repeated encoding number of times can be 2 or 3 or 4 inferior.Need to prove that the repeated encoding number of times can be selected according to the practical application scene in this step, just described mode comparatively commonly used here.Repeated encoding and modulation treatment do not have the restriction of sequencing, and specific implementation belongs to those skilled in the art's conventional techniques means, repeat no more here.
Step 201: according to the spreading factor that sets in advance to through repeated encoding and the modulation after signal carry out spread processing.In this step, when modulating for BPSK, spread spectrum can be 2 or 4 times of spread spectrums etc.; For QPSK modulation and 16QAM modulation, spread spectrum can be 2 or 4 times of spread spectrums, 3 times of spread spectrums etc.The spread spectrum specific implementation belongs to those skilled in the art's conventional techniques means, repeats no more here.Need to prove that the spread spectrum mode can be selected according to the practical application scene in this step, just described mode comparatively commonly used here.
Specific implementation for step 200～step 201 can include but not limited to following method:
1) single data stream feedback adopts the single data stream ACK/NACK of repeated encoding 3 times, BPSK modulation, 2 or 4 times of spread spectrums, multiplexing 8 RNs/UEs of I+Q two-way, the effect of R-PHICH/PHICH group index and cyclic shift index with have now identical;
2) dual data stream feedback adopts the dual data stream ACK/NACK of repeated encoding 3 times, BPSK modulation, 2 or 4 times of spread spectrums, multiplexing 4 RNs/UEs of I+Q two-way, at this moment, respectively corresponding 2 data flow of per 2 cyclic shift index, promptly only 4 cyclic shift index are effective;
Perhaps, the dual data stream ACK/NACK of multiplexing 8 RNs/UEs of I+Q two-way, at this moment, respectively corresponding 2 data flow of per 2 R-PHICH/PHICH group indexes;
By way of example, 4 effective forms of cyclic shift index can be 0,2,4,6, when emission cyclic shift index be " 0 " or " 2 " or " 4 " or " 6 " according to the cyclic shift index calculation feedback information resource index of launching, when emission cyclic shift index is " 1 " or " 3 " or " 5 " or " 7 ", subtracts the value that obtains after " 1 " according to the cyclic shift index of launching and calculate the feedback information resource index.
Perhaps, when described 4 cyclic shift index effectively can be 1,3,5,7, when emission cyclic shift index be " 1 " or " 3 " or " 5 " or " 7 " according to the cyclic shift index calculation feedback information resource index of launching, when emission cyclic shift index is " 0 " or " 2 " or " 4 " or " 6 ", adds the value that obtains after " 1 " according to the cyclic shift index of launching and calculate the feedback information resource index.
Perhaps, 4 effective forms of cyclic shift index can be 0,1,2,3, when emission cyclic shift index be " 0 " or " 1 " or " 2 " or " 3 " according to the cyclic shift index calculation feedback information resource index of launching, when emission cyclic shift index is " 4 " or " 5 " or " 6 " or " 7 ", subtracts the value that obtains after " 4 " according to the cyclic shift index of launching and calculate the feedback information resource index.
Perhaps, when described 4 effective forms of cyclic shift index can be 4,5,6,7, when emission cyclic shift index be " 4 " or " 5 " or " 6 " or " 7 " according to the cyclic shift index calculation feedback information resource index of launching, when emission cyclic shift index is " 0 " or " 1 " or " 2 " or " 3 ", adds the value that obtains after " 4 " according to the cyclic shift index of launching and calculate the feedback information resource index.
3) multiple data stream feedback adopts the multiple data stream ACK/NACK of repeated encoding 3 times, BPSK modulation, 2 or 4 times of spread spectrums, multiplexing 2 RNs/UEs of I+Q two-way, at this moment, respectively corresponding 4 data flow of per 4 cyclic shift index, promptly only 2 cyclic shift index are effective;
Perhaps, the multiple data stream ACK/NACK of multiplexing 8 RNs of I+Q two-way, at this moment, respectively corresponding 4 data flow of per 4 R-PHICH/PHICH group indexes.
By way of example, 2 effective forms of cyclic shift index can be 0,4, when emission cyclic shift index is 0 or 4 according to the cyclic shift index calculation feedback information resource index of emission; When emission cyclic shift index is 1 or 5, subtracts one value according to the cyclic shift index of emission and calculate the feedback information resource index; When emission cyclic shift index is 2 or 6, calculate the feedback information resource index according to the value that the cyclic shift index of launching subtracts after two; When emission cyclic shift index is 3 or 7, calculate the feedback information resource index according to the value that the cyclic shift index of launching subtracts after three.Here describe for example only the time, other implementations are similar, repeat no more here.
4) the dual data stream feedback adopts repeated encoding 2 times, QPSK modulation, 3 times of spread spectrums, and the dual data stream ACK/NACK of multiplexing 6 RNs/UEs, at this moment, 1 respectively corresponding 2 data flow of QPSK constellation symbol;
Perhaps, repeated encoding 3 times, QPSK modulation, 2 or 4 times of spread spectrums, the dual data stream ACK/NACK of multiplexing 4 RNs/UEs, at this moment, 1 respectively corresponding 2 data flow of QPSK constellation symbol;
Perhaps, repeated encoding 4 times, QPSK modulation, 3 times of spread spectrums, the dual data stream ACK/NACK of multiplexing 3 RNs/UEs, at this moment, 1 respectively corresponding 2 data flow of QPSK constellation symbol.
5) the multiple data stream feedback adopts repeated encoding 2 times, 16QAM modulation, 3 times of spread spectrums, and the multiple data stream ACK/NACK of multiplexing 6 RNs/UEs, at this moment, 1 respectively corresponding 4 data flow of 16QAM constellation symbol
Perhaps, repeated encoding 3 times, 16QAM modulation, 2 or 4 times of spread spectrums, the multiple data stream ACK/NACK of multiplexing 4 RNs/UEs, at this moment, 1 respectively corresponding 4 data flow of 16QAM constellation symbol;
Perhaps, repeated encoding 4 times, 16QAM modulation, 3 times of spread spectrums, the multiple data stream ACK/NACK of multiplexing 3 RNs/UEs, at this moment, 1 respectively corresponding 4 data flow of 16QAM constellation symbol.
Step 202: control channel resource corresponding behind the spread spectrum is carried out on the time orientation and the mapping on the frequency direction.In this step,
Mapping on time orientation comprises normal R-PHICH or PHICH duration, and the R-PHICH of expansion or the mapping under PHICH duration two kinds of situations.
With the example that is mapped as of R-PHICH, being mapped as on time orientation for there not being the base station to arrive the situation of the R-PCFICH of RN link, can be shone upon different R-PHICH groups, and promptly R-PHICH only continues an OFDM symbol (normal R-PHICH duration); For there being the base station to arrive the situation of the R-PCFICH of RN link, adopting the fixing mapping of agreement is formula (1);
Mapping on frequency direction is divided into: for the continuous Resource Block or the situation of frequency resource, shine upon according to formula (2) or (3) of agreement regulation; For the discrete Resource Block or the situation of frequency resource, Resource Block or frequency resource that all are discrete are regarded continuous situation as, shine upon according to formula (2) or (3) of agreement regulation.Be specially:
Based on the normal R-PHICH/PHICH duration, on frequency direction:
Based on the R-PHICH/PHICH duration of expansion, on frequency direction:
Wherein, m ' is the map unit index, n
L 'The interior REG quantity that is not taken of OFDM symbol l ' of Physical Downlink Control Channel (R-PDCCH/PDCCH) for the Physical Downlink Control Channel/link that direct transfers of carrying repeated link by R-PCFICH/PCFICH, k ' and l ' represent not frequency direction index and the time orientation index of the REG that taken by R-PCFICH/PCFICH and R-PHICH/PHICH respectively, i is the REG sequence number (i=0 that R-PHICH/PHICH comprises, 1,2).Need to prove, for n
L 'For the interior REG quantity that is not taken by R-PCFICH/PCFICH of the OFDM symbol l ' of R-PDCCH less than the interior REG quantity that is not taken of the OFDM symbol l ' of PDCCH by R-PCFICH/PCFICH.
The present invention realizes the method for channel multiplexing and mapping, is applicable to the multiplexing of R-PHICH and PHICH and mapping.Channel architecture and mapping method are simple, have adapted to the demand of the goal in research of B3G/4G well, have solved the problem of multi-data flow feedback acknowledgement.Simultaneously, the inventive method has guaranteed backwards compatibility (compatible LTE system).
Corresponding the inventive method also provides a kind of device of realizing channel multiplexing and mapping, and Fig. 3 is the composition structural representation of the device of channel multiplexing of the present invention and mapping, as shown in Figure 3, comprise repeated encoding unit, modulating unit, spectrum-spreading unit and map unit, wherein
The repeated encoding unit is used for the single data stream or the multiple data stream feedback information of uplink service are carried out repeated encoding, and coded message is sent to modulating unit.
Modulating unit is used for modulating from the coded message of repeated encoding unit, and modulation intelligence is sent to spectrum-spreading unit.Modulating unit comprises the combination in any of BPSK modulation module, QPSK modulation module or 16AQM modulation module, specifically uses which kind of modulation system to be set in advance by system.
Spectrum-spreading unit stores the spreading factor of different spread spectrum modes, be used for the modulation intelligence that receives is carried out spread processing, and the multiplexed information that will obtain after will handling sends to map unit.Spectrum-spreading unit comprises 2 or 4 times of spread spectrum module, and/or 3 times of combination in any such as spread spectrum module.
Map unit is used for the multiplexed information that receives is shone upon processing, obtains multiplexing of channel and map information.Launch after handling by many antennas afterwards.
To realize that R-PHICH is multiplexing and be mapped as example, the inventive method is described in detail below in conjunction with some embodiment.Set in advance the spread spectrum table, be used to search corresponding spreading factor.
Table one is 2 or 4 times of spread spectrum tables.Spreading factor is an orthogonal sequence in Table 1, and corresponding different sequence index adopts different spreading factors, corresponding same sequence index, and corresponding normal cyclic prefix adopts different spreading factors with extended cyclic prefix.
Table one
Table two is 3 times of spread spectrum tables.Spreading factor is an orthogonal sequence in table two, and corresponding different sequence index adopts different spreading factors.
| Sequence index (Sequence index) | Orthogonal sequence (Orthogonal sequence) |
| 0 | [1?1?1] |
| 1 | [1?e j2π/3?e j4π/3] |
| 2 | [1?e j4π/3?e j2π/3] |
Table two
First embodiment, multiplexing 8 RNs of single data stream feedback information that adopt BPSK to modulate.
The feedback information of uplink service of supposing the RN correspondence is for " 1 ", is " [1,1,1] " behind the repeated encoding 3 times then, carry out BPSK modulation back and be " [1 ,-1 ,-1] ", and hypothesis utilizes " [1; 1 ,-1 ,-1] " to carry out 2 or 4 times of spread spectrums to obtain " [1 ,-1; 1,1 ,-1 ,-1; 1,1 ,-1 ,-1; 1,1] ", its corresponding 1 R-PHICH resource adopts formula (1) and (2) shining upon on the time orientation He on the frequency direction afterwards.
After the multiplexing of base station and mapping processing, the ACK/NACK that has 8 RNs correspondences in this R-PHICH group is together multiplexing, launch after adopting many antenna processing the base station, receiving terminal RNs goes out to belong to the resource location of the feedback information of self according to R-PHICH group index and cyclic shift index calculation, carries out the demodulation process of R-PHICH.
Second embodiment, multiplexing 4 RNs of dual data stream feedback information that adopt BPSK to modulate.
The dual data stream feedback information of uplink service of supposing this RN correspondence is for " 1 " and " 0 ", be " [1,1,1] " and " [0,0; 0] " behind the repeated encoding 3 times then, and carrying out BPSK modulation back is " [1 ,-1 ,-1] " and " [1,1; 1] ", and after supposing that 2 or 4 times of spread spectrums are carried out in utilization " [1,1 ,-1 ,-1] " and " [1 ;-1 ,-1,1] ", obtains " [1 ;-1,1,1 ,-1 ;-1,1,1 ,-1,-1,1,1] " and " [1 ,-1,-1,1,1 ,-1,-1,1,1 ,-1,-1,1] ", its respectively corresponding 2 R-PHICH resources adopt formula (1) and (2) shining upon on the time orientation He on the frequency direction afterwards.
After the multiplexing of base station and mapping processing, the ACK/NACK that has 4 RNs correspondences in this R-PHICH group is together multiplexing, launch after adopting many antenna processing the base station, receiving terminal RNs goes out to belong to the resource location of the feedback information of self according to R-PHICH group index and cyclic shift index calculation, carries out the demodulation process of R-PHICH.
The 3rd embodiment, multiplexing 8 RNs of dual data stream feedback information that adopt BPSK to modulate.
The feedback information of uplink service of supposing this RN correspondence is for " 1 " and " 0 ", be " [1,1,1] " and " [0,0; 0] " behind the repeated encoding 3 times then, and carrying out BPSK modulation back is " [1 ,-1 ,-1] " and " [1,1; 1] ", and after supposing that 2 or 4 times of spread spectrums are carried out in utilization " [1,1 ,-1 ,-1] " and " [1 ;-1 ,-1,1] " respectively, obtains " [1 ;-1,1,1 ,-1 ;-1,1,1 ,-1,-1,1,1] " and " [1 ,-1,-1,1,1 ,-1,-1,1,1 ,-1,-1,1] ", the resource that it answers 2 R-PHICH groups respectively adopts formula (1) and (2) shining upon on the time orientation He on the frequency direction afterwards.
After the multiplexing of base station and mapping processing, the ACK/NACK that has 4 RNs correspondences in this R-PHICH group is together multiplexing, launch after adopting many antenna processing the base station, receiving terminal RNs goes out to belong to the resource location of the feedback information of self according to R-PHICH group index and cyclic shift index calculation, carries out the demodulation process of R-PHICH.
The 4th embodiment, multiplexing 6 RNs of dual data stream feedback information that adopt QPSK to modulate.
The feedback information of uplink service of supposing this RN correspondence is for " 10 ", is " [10,10] " behind the repeated encoding 2 times then, carry out QPSK modulation back and be " [1+j ,-1+j] ", and hypothesis utilizes " [1; 1,1] " to carry out obtaining behind 3 times of spread spectrums " [1+j ,-1+j ;-1+j ;-1+j ,-1+j ,-1+j] ", its corresponding 1 R-PHICH resource adopts formula (1), (2) and (3) shining upon on the time orientation He on the frequency direction afterwards.
After the multiplexing of base station and mapping processing, the ACK/NACK that has 6 RNs correspondences in this R-PHICH group is together multiplexing, launch after adopting many antenna processing the base station, receiving terminal RNs goes out to belong to the resource location of the feedback information of self according to R-PHICH group index and cyclic shift index calculation, carries out the demodulation process of R-PHICH.
The 5th embodiment, multiplexing 3 RNs of multiple data stream feedback information that adopt 16QAM to modulate.
The feedback information of supposing the uplink service of this RN correspondence is " 1011 ", and then repeated encoding is for 4 times " [1011,1011; 1011,1011] ", carries out 16QAM modulation back and is " [3+3j ;-3+3j ,-3+3j ,-3+3j] ", after supposing to utilize " [1,1,1] " to carry out 3 times of spread spectrums, obtain " [3+3j ,-3+3j ,-3+3j ;-3+3j ,-3+3j ,-3+3j ;-3+3j ;-3+3j ,-3+3j ,-3+3j ;-3+3j ;-3+3j] ", its corresponding 1 R-PHICH resource adopts formula (1), (2) and (3) shining upon on the time orientation He on the frequency direction afterwards.
After the multiplexing of base station and mapping processing, the ACK/NACK that has 3 RNs correspondences in this R-PHICH group is together multiplexing, launch after adopting many antenna processing the base station, receiving terminal RNs goes out to belong to the resource location of the feedback information of self according to R-PHICH group index and cyclic shift index calculation, carries out the demodulation process of R-PHICH.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. the method for channel multiplexing and mapping is characterized in that this method comprises:
Single data stream or multiple data stream feedback information to uplink service carry out repeated encoding and modulation treatment;
According to the spreading factor that sets in advance to through repeated encoding and the modulation after signal carry out spread processing;
Control channel resource corresponding behind the spread spectrum is carried out on the time orientation and the mapping on the frequency direction.
2. method according to claim 1 is characterized in that, described channel is the automatic repeat requests indicating channel of the physical mixed of repeated link R-PHICH, or the Physical HARQ Indicator Channel PHICH of the link that direct transfers.
3. method according to claim 2 is characterized in that, described single data stream or multiple data stream feedback information are bit level information.
4. method according to claim 3 is characterized in that, described modulation treatment is BPSK modulation, QPSK modulation or 16QAM modulation.
5. method according to claim 3 is characterized in that, the number of times of described repeated encoding is 2 times or 3 times or 4 times.
6. method according to claim 3 is characterized in that, described 2 or 4 times of spread spectrums, perhaps 3 times of spread spectrums of spreading to.
7. method according to claim 3 is characterized in that, described mapping on time orientation comprises: normal R-PHICH or PHICH duration, and the R-PHICH of expansion or the mapping under PHICH duration two kinds of situations;
For there not being the base station to arrive the situation of the R-PCFICH/PCFICH of RN/UE link, on time orientation the normal R-PHICH/PHICH duration, described R-PHICH/PHICH continues an OFDM symbol;
For there being the base station to arrive the situation of the R-PCFICH/PCFICH of RN/UE link, shine upon according to following formula:
Wherein m ' is the map unit index, k ' and l ' represent not frequency direction index and the time orientation index of the resource element group REG that taken by Physical Control Format Indicator Channel PCFICH and R-PHICH/PHICH respectively, i is the REG sequence number (i=0,1,2) that R-PHICH/PHICH comprises.
8. method according to claim 3 is characterized in that, the method for described mapping on frequency direction is:
For the continuous Resource Block or the situation of frequency resource, shine upon in according to the following equation;
For the discrete Resource Block or the situation of frequency resource, Resource Block or frequency resource that all are discrete are regarded continuous situation as, shine upon according to the following equation:
Based on the normal R-PHICH/PHICH duration, on frequency direction:
Based on the R-PHICH/PHICH duration of expansion, on frequency direction:
Wherein, m ' is the map unit index, n
L 'The interior REG quantity that is not taken of OFDM symbol l ' of Physical Downlink Control Channel R-PDCCH/PDCCH for the Physical Downlink Control Channel/link that direct transfers of carrying repeated link by R-PCFICH/PCFICH, k ' and l ' represent not frequency direction index and the time orientation index of the REG that taken by R-PCFICH/PCFICH and R-PHICH/PHICH respectively, i is the REG sequence number (i=0 that R-PHICH/PHICH comprises, 1,2);
n
L 'For the interior REG quantity that is not taken of the OFDM symbol l ' of R-PDCCH, less than being the interior REG quantity that is not taken of OFDM symbol l ' of PDCCH by R-PCFICH/PCFICH by R-PCFICH/PCFICH.
9. method according to claim 3 is characterized in that, described single data stream or multiple data stream feedback information carry out repeated encoding, modulation treatment and spread processing and be specially:
Adopt the single data stream ACK/NACK of repeated encoding 3 times, BPSK modulation, 2 or 4 times of spread spectrums, multiplexing 8 RNs/UEs of I+Q two-way for single data stream feedback, the effect of R-PHICH/PHICH group index and cyclic shift index with have now identical;
Perhaps, adopt the dual data stream ACK/NACK of repeated encoding 3 times, BPSK modulation, 2 or 4 times of spread spectrums, multiplexing 4 RNs/UEs of I+Q two-way for dual data stream feedback, at this moment, respectively corresponding 2 data flow of per 2 cyclic shift index, 4 cyclic shift index are effective;
Perhaps, adopt the dual data stream ACK/NACK of repeated encoding 3 times, BPSK modulation, 2 or 4 times of spread spectrums, multiplexing 8 RNs/UEs of I+Q two-way for dual data stream feedback, at this moment, respectively corresponding 2 data flow of per 2 R-PHICH/PHICH group indexes, 4 cyclic shift index are effective;
Perhaps, adopt the multiple data stream ACK/NACK of repeated encoding 3 times, BPSK modulation, 2 or 4 times of spread spectrums, multiplexing 2 RNsUEs of I+Q two-way for multiple data stream feedback, at this moment, respectively corresponding 4 data flow of per 4 cyclic shift index, 2 cyclic shift index are effective;
Perhaps, adopt the multiple data stream ACK/NACK of repeated encoding 3 times, BPSK modulation, 2 or 4 times of spread spectrums, multiplexing 8 RNs/UEs of I+Q two-way for multiple data stream feedback, at this moment, respectively corresponding 4 data flow of per 4 R-PHICH/PHICH group indexes, 2 cyclic shift index are effective;
Perhaps, adopt repeated encoding 2 times for the dual data stream feedback, QPSK modulation, 3 times of spread spectrums, the dual data stream ACK/NACK of multiplexing 6 RNs/UEs, at this moment, 1 respectively corresponding 2 data flow of QPSK constellation symbol;
Perhaps, adopt repeated encoding 3 times for the dual data stream feedback, QPSK modulation, 2 or 4 times of spread spectrums, the dual data stream ACK/NACK of multiplexing 4 RNs/UEs, at this moment, 1 respectively corresponding 2 data flow of QPSK constellation symbol;
Perhaps, adopt repeated encoding 4 times for the dual data stream feedback, QPSK modulation, 3 times of spread spectrums, the dual data stream ACK/NACK of multiplexing 3 RNs/UEs, at this moment, 1 respectively corresponding 2 data flow of QPSK constellation symbol.
Perhaps, adopt repeated encoding 2 times for the multiple data stream feedback, 16QAM modulation, 3 times of spread spectrums, the multiple data stream ACK/NACK of multiplexing 6 RNs/UEs, at this moment, 1 respectively corresponding 4 data flow of 16QAM constellation symbol;
Perhaps, adopt repeated encoding 3 times for the multiple data stream feedback, 16QAM modulation, 2 or 4 times of spread spectrums, the multiple data stream ACK/NACK of multiplexing 4 RNs/UEs, at this moment, 1 respectively corresponding 4 data flow of 16QAM constellation symbol;
Perhaps, adopt repeated encoding 4 times for the multiple data stream feedback, 16QAM modulation, 3 times of spread spectrums, the multiple data stream ACK/NACK of multiplexing 3 RNs/UEs, at this moment, 1 respectively corresponding 4 data flow of 16QAM constellation symbol.
10. method according to claim 9 is characterized in that, when described 4 cyclic shift index effectively and when being 0,2,4,6, when emission cyclic shift index is 0 or 2 or 4 or 6 according to the cyclic shift index calculation feedback information resource index of emission; When emission cyclic shift index is 1 or 3 or 5 or 7, subtracts the value that obtains after according to the cyclic shift index of launching and calculate the feedback information resource index;
Perhaps, when described 4 cyclic shift index effectively and when being 1,3,5,7, when emission cyclic shift index is 1 or 3 or 5 or 7 according to the cyclic shift index calculation feedback information resource index of emission, when emission cyclic shift index is 0 or 2 or 4 or 6, adds the value that obtains after according to the cyclic shift index of launching and calculate the feedback information resource index;
Perhaps, when described 4 cyclic shift index effectively and when being 0,1,2,3, when emission cyclic shift index is 0 or 1 or 2 or 3 according to the cyclic shift index calculation feedback information resource index of emission, when emission cyclic shift index is 4 or 5 or 6 or 7, subtracts the value that obtains after four according to the cyclic shift index of launching and calculate the feedback information resource index;
Perhaps, when described 4 cyclic shift index effectively and when being 4,5,6,7, when emission cyclic shift index is 4 or 5 or 6 or 7 according to the cyclic shift index calculation feedback information resource index of emission, when emission cyclic shift index is 0 or 1 or 2 or 3, adds the value that obtains after four according to the cyclic shift index of launching and calculate the feedback information resource index;
When 2 cyclic shift index effectively and when being 0,4, when emission cyclic shift index is 0 or 4 according to the cyclic shift index calculation feedback information resource index of emission; When emission cyclic shift index is 1 or 5, subtracts one value according to the cyclic shift index of emission and calculate the feedback information resource index; When emission cyclic shift index is 2 or 6, calculate the feedback information resource index according to the value that the cyclic shift index of launching subtracts after two; When emission cyclic shift index is 3 or 7, calculate the feedback information resource index according to the value that the cyclic shift index of launching subtracts after three.
11. the device of channel multiplexing and mapping is characterized in that this device comprises repeated encoding unit, modulating unit, spectrum-spreading unit and map unit, wherein,
The repeated encoding unit is used for the single data stream or the multiple data stream feedback information of uplink service are carried out repeated encoding, and coded message is sent to modulating unit;
Modulating unit is used for modulating from the coded message of repeated encoding unit, and modulation intelligence is sent to spectrum-spreading unit;
Spectrum-spreading unit stores the spreading factor of different spread spectrum modes, be used for the modulation intelligence that receives is carried out spread processing, and the multiplexed information that will obtain after will handling sends to map unit;
Map unit is used for the multiplexed information that receives is shone upon processing, obtains multiplexing of channel and map information.
12. device according to claim 11 is characterized in that, described modulating unit comprises the combination in any of BPSK modulation module, QPSK modulation module or 16AQM modulation module.
13., it is characterized in that described spectrum-spreading unit comprises 2 or 4 times of spread spectrum module according to claim 11 or 12 described devices, and/or 3 times of spread spectrum module.
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