CN101127584A - Method and device for feeding back and receiving ACK/NAK information - Google Patents

Method and device for feeding back and receiving ACK/NAK information Download PDF

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Publication number
CN101127584A
CN101127584A CNA2006101287767A CN200610128776A CN101127584A CN 101127584 A CN101127584 A CN 101127584A CN A2006101287767 A CNA2006101287767 A CN A2006101287767A CN 200610128776 A CN200610128776 A CN 200610128776A CN 101127584 A CN101127584 A CN 101127584A
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resource
ack
channel
nak information
information
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王云峰
高全中
汪璇
杨云松
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Abstract

The utility model discloses a method and a device, which are used to feedback and receive ACK/NAK information, and used to support the condition that, when the system adopts a resource distribution strategy mixed by two or more resource distribution methods, the system needs to feedback at the same time a plurality of ACK/NAK information bits; the ACK/NAK information is adopted to perform grouping; according to the ACK/NAK information of different groups, different orthogonal basis are chosen to perform orthogonal transformation in the corresponding orthogonal basis groups; the same reverse ACK channel is modulated to send. The network side adopts the corresponding reverse orthogonal transformation to obtain the ACK/NAK information. By adopting the utility model, the present R-ACKCH resource is fully utilized to transmit the ACK/NAK information corresponding to various resource distribution methods under the condition of no added system overhead. The utility model also discloses a method used to improve the system interference accuracy. Under the condition of various mixed resource distribution methods, the maximum diversity gain of the R-ACKCH channel resource is obtained. The network side can fully utilize the resources to perform interference estimation, and the estimation accuracy of the system interference value is thereby improved.

Description

The method and apparatus of feedback and reception ACK/NAK information
Technical field
The present invention relates to the information transmission technology in the multi-carrier communications systems, be particularly related in a kind of multi-carrier communications systems feedback and confirmation of receipt/deny (Acknowledgement/NegativeAcknowledgement, ACK/NAK) method and apparatus of information and improve the method that system interference is estimated accuracy.
Background technology
At present, the re-transmission mode in the communication system adopts usually and mixes automatic request retransmission (HARQ).Be that transmitting terminal sends grouped data to receiving terminal, behind the correct receiving block data of receiving terminal, promptly, represent this transmission success to transmitting terminal feeding back ACK information; When receiving terminal receives when making a mistake grouped data, promptly, represent this bust this to transmitting terminal feedback NAK information, require transmitting terminal to resend grouped data or send the redundant information of grouped data.Wherein, receiving terminal utilizes same channel feedback ACK information and NAK information, generally all can have special channel to be used to carry out the feedback of ACK/NAK information.
OFDM (0FDM) technology is a kind of multi-carrier modulation technology, have between each subcarrier 1/2 overlapping, but keep mutually orthogonal, receiving terminal can by the correlation demodulation technical point from, constitute data transmission system more efficiently.When applying to the HARQ technology in the ofdm system, system can divide the channel of certain sub-carrier resources as feeding back ACK/NAK information separately.
OFDM (OFDMA) system is a multi-carrier communications systems, and it is the multiuser multiplexing technology based on OFDM, by giving different users with different subcarrier allocation, has guaranteed the orthogonality between each user.
At present in 3GPP2 AIE (AIE), be example with the OFDMA system of 512 point fast Fourier conversion (FFT), mainly contain following several to the allocation strategy of subcarrier:
First kind: piece channel resource (BRCH): system is divided into several subbands (SubBand) in order with whole sub-carrier resources, and each subband comprises the continuous sub-carriers resource of some.When system carries out resource allocation, give the AT that is scheduled with one or more allocation of subbands, like this, different AT has used different sub band resources, thereby has kept the orthogonality between different user.If also consider the frequency selective fading of each AT on different frequency range when carrying out the BRCH resource allocation, BRCH can also obtain maximum frequency selectivity gain so.The typical B RCH that recommends in the framework agreement (framework) of nearest 3GPP2 AIE second stage distributes, and as shown in Figure 1: each BRCH comprises the frequency domain resource of 16 subcarriers and the time-domain resource of 8 OFDM symbols (symbol).Each subband comprises 16 sub-carrier resources, for the OFDMA system of 512 FFT, can be divided into 32 subbands, the note do BRCH (32,0), BRCH (32,1) ..., BRCH (32,31).Wherein: symbol BRCH (N, k) in, N represents that the whole system bandwidth can be divided into N BRCH subband, k represents wherein k BRCH channel.
Second kind: distributed block channel resource (DRCH): it is the minimum frequency allocation units that the branch of system resource is equipped with subcarrier, on frequency domain, sub-carrier resources is divided into some groups (N), every group of subcarrier that comprises equal number.When carrying out resource allocation, (0＜=k＜N) set of dispense uses for certain AT with k.The resource of this AT distribution is evenly distributed within the whole frequency band like this, has obtained maximum frequency diversity gain.The typical DRCH that recommends in the framework agreement of nearest 3GPP2 AIE second stage distributes, as shown in Figure 2:
Every group of time-domain resource that comprises 16 sub-carrier resources and 8 OFDM symbols for the OFDMA system of 512 FFT, can be divided into 32 groups, the note do DRCH (32,0), DRCH (32,1) ..., DRCH (32,31).Wherein: symbol DRCH (N, k) in, N represents that the whole system bandwidth can be divided into N DRCH group, k represents wherein k DRCH channel.
BRCH mainly can obtain the frequency selectivity gain, DRCH then mainly can obtain frequency diversity gain, they have different separately use scenes, therefore BRCH and DRCH are combined, in resource allocation, use this two kinds of strategies simultaneously, so just can take into account actual various possibility scenes.BRCH and DRCH are carried out combination, exactly on a kind of basis of resource distribution mode with mode another resource distribution mode that superposes of punching, the third and the 4th kind of possible method of salary distribution promptly described below.
The third: the DRCH BRCH that punches: system at first uses BRCH to carry out resource allocation, the DRCH user of redistribution section on distribution result then, these be assigned with DRCH CU the original BRCH user's of part resource, form a kind of form of punching.As shown in Figure 3, grey, sky blue, green and yellow user are the BRCH method of salary distribution, and red user is the DRCH distribution method, and they have taken the BRCH user's of part resource.
The 4th kind: the BRCH DRCH that punches: system at first uses DRCH to carry out resource allocation, the BRCH user of redistribution section on distribution result then, these be assigned with BRCH CU the original DRCH user's of part resource, form a kind of form of punching.As shown in Figure 4, color segment user is the DRCH method of salary distribution, and grey user is the BRCH method of salary distribution, the BRCH DRCH resource of having punched, and it has taken the DRCH user's of part resource.
Below only illustrate, but above-mentioned various resource distribution mode also is applicable to the 0FDMA system of other FFT size, also is applicable to other multi-carrier communications systems simultaneously with the OFDMA system of 512 FFT.
When the OFDMA system carries out the transmission of downlink data, at first distribute certain forward BRCH or forward DRCH resource in forward shared control channel (F-SCCH) assignment message, for each serviced accessing terminal (AT), also distribute reverse channel resources simultaneously by access network (AN).AN sends the modulating data of corresponding AT, i.e. forward data transmission on the forward BRCH of correspondence or forward DRCH forward direction resource then.Simultaneously, each AT receives the downlink data that AN sends on forward BRCH that distributes to oneself or forward DRCH resource, last AT carries out CRC check to the packet of receiving, and goes up the corresponding ACK/NAK information bit of transmission according to check results at reverse ack channel (R-ACKCH).
Design and the resource distribution mode of R-ACKCH are closely related: when system only exists forward BRCH or forward DRCH, whole system available subcarrier resource is divided into the group (or subband) of N quadrature, and each group only can be given an AT in the same moment and use.Therefore, each ACK/NAK information can be corresponding to each forward BRCH that is assigned with or forward DRCH resource.Like this, these ACK/NAK information are all unique corresponding with a forward BRCH or forward DRCH respectively, thereby each AT feeding back ACK/NAK just has been equivalent to each forward BRCH or forward DRCH feeding back ACK/NAK information.Carry the ACK/NAK information to each forward BRCH or forward DRCH in R-ACKCH, AN receives that these information just can determine that HARQ has transmitted later.
In the framework agreement of 3GPP2 AIE second stage, the plurality of unit reverse channel resources that R-ACKCH uses AN to distribute in system.As shown in Figure 5: the reverse resource of each unit all comprises 16 sub-carrier resources, 8 OFDM symbol lengths, and these resources are divided into several watts (Tile) again, and each Tile comprises the frequency domain length of 8 subcarriers and the time span of 8 symbols.A Tile is divided into 4 sons watt (SubTile) again, and each SubTile takies 8 subcarriers and 2 symbols, and promptly each SubTile comprises 16 time-frequency pieces (minimum time, the frequency cells that accounts for 1 symbol and 1 subcarrier is called " time-frequency piece ").Wherein, the different watt utilization of resources watt resource sequence numbers identify.
Each SubTile carries the ACK/NAK information of 8 bits, corresponds respectively to forward BRCH or forward DRCH resource that 8 different data channels use.I ACK/NAK information bit in these 8 ACK/NAK information bits, an orthogonal basis W of corresponding 16 rank DFT conversion 16 i(this paper is with W 16 iRepresent i orthogonal basis of 16 rank DFT conversion, as follows), ACK/NAK information bit and orthogonal basis are multiplied each other, obtain ACK i* W 16 i, it is that a length is 16 symbol sebolic addressing, is filled in 16 time-frequency pieces of corresponding SubTile.Utilize the orthogonality of DFT conversion like this, 8 ACK/NAK information bits use 16 rank DFT orthogonal basiss of 8 quadratures to carry out symbol sebolic addressing that conversion obtains later on respectively and remain quadrature, so just can transmit in a SubTile.Each SubTile repeats 4 times, constitutes a Tile, to obtain better diversity gain.
For the OFDMA system of 512 FFT, system bandwidth is 5,000,000, can be divided into 32 DRCH and/or 32 BRCH channel resources.Its R-ACKCH takies 2 unit resource channels, carries the ACK/NAK information that the forward direction channel resource is fed back.R-ACKCH comprises 4 watts, is evenly distributed in the whole backward channel bandwidth.
Introduce the process of an AT below at the feeding back ACK/NAK information of first son bag (sub-packet) of forward BRCH or forward DRCH.As shown in Figure 6, this method comprises:
Step 601 according to receiving data conditions from AN, is determined the ACK/NAK value of information of this forward BRCH or forward DRCH correspondence;
Step 602 is calculated employed watt of resource of ACK/NAK information;
In this step, calculate watt resource of feeding back ACK/NAK information; Therefore this watt utilization of resources watt resource sequence number sign is calculated watt resource and is promptly calculated a watt resource sequence number Tile, as follows.
The method of calculating this watt resource sequence number Tile is: identify according to forward BRCH: BRCH (32, i) or forward DRCH sign DRCH (32, i), i is carried out rounding operation, i.e. Tile=[i/8], wherein, i is the logic sequence number of BRCH or the position of DRCH.Symbol [*] expression is carried out the round numbers computing to *, and when in [*] uses during rounding operation, the Tile sequence number sorts since 1; When [*] used rounding operation, the Tile sequence number was since 0 ordering.Agreement is used rounding operation down herein, and the Tile sequence number is since 0, and is as follows.But for last rounding operation, revise the Tile sequence number since 1, this patent stands good.
Step 603 is calculated the employed orthogonal basis sequence number of ACK/NAK information k;
Each ACK/NAK information to be sent is all utilized certain orthogonal basis W of one 16 rank discrete fourier transform (DFT) 16 mCarry out 16 rank discrete fourier transforms, this paper is with W 16 mRepresent m orthogonal basis of 16 rank DFT conversion, as follows.In this step, calculate the pairing orthogonal basis sequence number of ACK/NAK information k to be sent according to the logic sequence number of Traffic Channel child node.Its computational methods are: the orthogonal basis sequence number is that the logic sequence number of Traffic Channel child node is got surplus result to 8, i.e. k=mod (i, 8).(n, m) the expression Integer n is to the integer m computing that rems for symbol mod.
Step 604 is utilized W 16 kThis ACK/NAK information is carried out 16 rank discrete fourier transforms;
16 rank discrete fourier transforms are according to formula ACK/NAK*W 16 kCarry out, obtain length after the 16 rank discrete fourier transforms and be 16 symbol sebolic addressing.
Step 605, with the result after the 16 rank discrete fourier transforms be modulated to specify watt watt on;
With the 16 rank discrete fourier transforms that obtain in the step 604 as a result on the son in watt resource that calculates in the step 602 of sequence modulation watt, promptly be filled in 16 time-frequency pieces of son watt.Then, the information in the son watt is repeated four times, on four sons watt, send, by repeating to obtain better diversity gain;
Adopt the mode of certain AN and AT agreement to carry out when repeating.Four sons in can being watt watt transmit identical information, perhaps adopt a kind of pseudorandom method, be that AN uses identical random number seed with AT, therefore both just can access the same pseudo-random sequence about four watts of resource sequence numbers that carry ACK/NAK information, the son that AN just can choose after receiving ACK/NAK information in four watts of corresponding resources watt carries out correct merging, obtains ACK/NAK information.
The son of appointment here watt, by the AN appointment, its will specify reverse ack channel use which backward channel which watt property information cycle be broadcast to AT.The 16 rank discrete fourier transform results that AT will obtain in this step are modulated in the appointment that reverse ack channel uses watt.
Step 606 sends on R-ACKCH.
So far, an AT has just finished the method flow of feedback at the ACK/NAK information of first son bag (sub-packet).As seen from Figure 6, step 603 and step 604 are that order is carried out, but step 602 can carry out simultaneously with step 603 and the 604 sequential steps groups that constitute, or between carry out with random order.AT feedback can simplified on the basis of Fig. 6 at the method for the ACK/NAK information of second and follow-up son bag (sub-packet). because AT has calculated employed watt of resource of ACK/NAK information and employed orthogonal basis sequence number k during at the ACK/NAK information of first son bag (sub-packet) in feedback, AT can store these information, when AT feedback is at the ACK/NAK information of second and follow-up son bag (sub-packet) like this, after step 601, can directly enter step 604.
Referring to Fig. 7, a concrete processing block diagram of prior art AT feeding back ACK/NAK information as shown in Figure 7, suppose that this AT need send the ACK/NAK information bit corresponding to channel designator i, it uses mod (i with ACK/NAK information so, 8) individual 16 rank DFT carry out conversion, and the result of conversion is filled on the R-ACKCH resource of [i/8] individual Tile correspondence.
Like this, each AT independently adopts top flow process to send the ACK/NAK information of self correspondence, and these information have been carried out natural stack when eating dishes without rice or wine to transmit, according to the orthogonality of DFT conversion, the differentiation that AN can be correct they.
Referring to Fig. 8, Fig. 8 receives ACK/NAK information processing block diagram for prior art AN.
The signal that AN receives radio frequency passes through after the fast Fourier transform (FFT), and to the symbol after the conversion, SubTile recurring rule by appointment carries out the merging of symbol level to 4 SubTile.With the input of the result after merging, carry out the IDFT conversion on one 16 rank as 16 rank discrete Fourier inverse transformations (16*16IDFT).Preceding 8 information bits of IDFT output result are defined as Traffic Channel, BRCH or DRCH Traffic Channel, corresponding ACK/NAK information sequence, back 8 information sequences of IDFT output result adopt certain average strategy to average, and the result is defined as the Interference Estimation value on this Tiles.AN averages the Interference Estimation value on several Tile according to certain mode after, as the Interference Estimation value of whole system.Quantize at last, obtain the ACK/NAK information bit of these Traffic Channel correspondences according to the Interference Estimation value of system ACK/NAK information sequence to the Traffic Channel correspondence.
When system adopts the scheduling strategy of DRCH punching BRCH or BRCH punching DRCH, there are N DRCH group and N BRCH subband in the system simultaneously, be the possibility that has had the combination of resources of 2N quadrature in the system, each combination of resources all may be given an independently AT use.Therefore, each ACK/NAK information can be corresponding to each combination of resources that is assigned with.Like this, these ACK/NAK information are all unique corresponding with a combination of resources respectively, thereby each AT feeding back ACK/NAK just has been equivalent to each combination of resources feeding back ACK/NAK.Carry the ACK/NAK feedback information to each combination of resources in R-ACKCH, AN receives that these information bits just can determine also that later on HARQ has transmitted.
That is to say,, need in the system N kind combination of resources feeding back ACK/NAK information for independent BRCH or DRCH resource allocation policy; For the resource allocation policy of DRCH punching BRCH or BRCH punching DRCH, system need be to 2N kind combination of resources feeding back ACK/NAK information.
In the prior art, for OFDMA system with 512 sub-carrier resources, the Tile of each R-ACKCH can transmit the ACK/NAK information of 8 forward BRCH or forward DRCH resource correspondence, and each Tile comprises 8 subcarriers and 8 symbol lengths, and 1 unit reverse channel resources comprises 16 subcarriers and 8 symbol lengths, so each Tile needs to take 1/2 unit reverse channel resources.Like this:
If system only adopts BRCH or DRCH resource allocation policy, need 32 possible ACK/NAK information of feedback, system need use the reverse resource of 32/8* (1/2)=2 unit as R-ACKCH so.
If system adopts the resource allocation policy of DRCH punching BRCH or BRCH punching DRCH, 64 possible ACK/NAK information need be fed back by system, and system need use the reverse resource of 2*32/8* (1/2)=4 unit as R-ACKCH so.
That is to say that for 512 same forward direction sub-carrier resources, after adopting mixing punching pattern, oppositely the expense of ack channel has increased one times, thereby the reverse traffic channel resource that is used for service data transmission has tailed off, and causes the reduction of systematic function.And when system adopted the resource allocation policy of DRCH punching BRCH, the user of use DRCH resource can be not a lot, otherwise the available subcarrier resource of meeting undue weakening BRCH.Same, when system adopts the resource allocation policy of BRCH punching DRCH, use the user of BRCH resource also can be not a lot, otherwise available subcarrier resource that also can undue weakening DRCH.Like this, because prior art is that each forward DRCH and forward BRCH resource have been distributed the independently ACK/NAK information of the resource transmission correspondence of R-ACKCH, when having only a spot of forward DRCH or forward BRCH resource to be assigned with, there is not the part resource of the R-ACKCH of the forward DRCH that uses or forward BRCH resource correspondence just to be wasted so.
In fact, the OFDMA system of not only above-mentioned 512 subcarriers is after adopting mixing punching pattern, the problem that has the R-ACKCH resource to be wasted, the OFDMA system of other FFT sizes, after adopting mixing punching pattern, the problem that exists above-mentioned R-ACKCH resource to be wasted equally.
In addition, in 3GPP2 AIE (AIE), the system descending channel adopts the OFDM technology at present, and whole channel is made up of the experimental process carrier wave, when carrying out downlink data transmission, utilize the sub carrier group that the parton carrier wave constitutes in the channel to come loaded packet data.Scheduling and assignment for convenience carried out the expression of image with whole channel width with " channel trees " usually, and a typical channel trees as shown in Figure 9.
Each node (Node) among Fig. 9 all has a numbering that the overall situation is unique, and note is made ChID, is called node ID, utilizes this node ID certain node of unique identification in system; The node of the bottom is called child node (BaseNode), as node 15,16 etc.Each child node comprises several continuous sub-carriers, generally comprises 16 subcarriers.In 3GPP2 AIE (AIE), the most basic frequency scheduling unit is exactly a child node, be that network is when distributing the channel of transmitting downlink data for user terminal, with 16 subcarriers that comprise in the child node is that unit carries out channel allocation, and 16 subcarriers are modulated in the child node that the downlink data utilization of transmission is assigned with.
When system carries out the transmission of downlink data, network side (AN) transmits downlink grouped data for each serviced accessing terminal (AT) distributes forward child node resource, also transmits the ACK/NAK information of reflection downlink data reception condition for each AT distributes reverse child node resource simultaneously.
AN is that AT distributes the process of forward child node resource to be: at first shared at forward direction by AN and distribute certain child node resource in signaling channel (F-SSCH) assignment message each serviced AT, this child node of distributing for transmitting downlink data is called the Traffic Channel child node, be forward child node resource, this Traffic Channel child node is with regard to unique corresponding 16 subcarriers; AN sends the modulating data of corresponding AT on the child node of correspondence then, it is downlink data transmission, each AT promptly utilizes the subcarrier of Traffic Channel child node correspondence that the grouped data that receives is carried out the demodulation sign indicating number distributing to the downlink data that receives the AN transmission on the Traffic Channel child node of oneself simultaneously; Last AT carries out Cyclic Redundancy Check to the grouped data that receives, and goes up the corresponding ACK/NAK information of transmission according to check results at reverse ack channel (R-ACKCH).Carry the ACK/NAK information to each Traffic Channel child node feedback in R-ACKCH, AN receives that these ACK/NAK information just can determine that HARQ has transmitted later.
In system, utilize the ACK/NAK information of R-ACKCH Channel Transmission Traffic Channel child node feedback.In fact, when the transferring ACK/NAK information, the R-ACKCH channel uses some reverse child node resources to carry out the ACK/NAK message transmission.AN can be in network periodically broadcast system distribute to number and concrete each reverse child node sequence number of the reverse child node that the R-ACKCH channel uses.Further, each reverse child node is divided into two watts of (Tile) resources, and each watt resource is identical with Fig. 5 with son watt resources relationship, no longer repeats here.
The process of AT feeding back ACK/NAK information is identical with receiving course shown in Figure 8 with process of transmitting shown in Figure 7 with the process that AN receives ACK/NAK information in this system, and just ACK/NAK information wherein is corresponding with the Traffic Channel child node.
For a Traffic Channel child node is distributed under a user's the situation, it is no problem utilizing said method feeding back ACK/NAK information.But along with professional rises such as voice IP (VoIP), the granularity of scheduling needs further to divide, present minimum frequency scheduling unit is a child node, if with more small grain size division, so just 1 child node two or more different users might have been distributed to, at this moment a child node has just needed corresponding several ACK/NAK information, with present ACK/NAK message transmission mechanism, owing to the orthogonal basis of watt resource that calculates according to same child node and use is all identical, so the ACK/NAK information of these several different users must adopt same reverse channel resources to transmit, so just can't distinguish these several ACK/NAK information.
In addition, the multi-antenna beam technology is also more used, in multiple-input and multiple-output (MIMO) technology of using many antennas, odd encoder piece (MCW, Multiple CodeWord) is a kind of a plurality of data flow to be carried out transmission manner, a plurality of streams simultaneously, be also referred to as " layer ", encode respectively, receiving terminal also needs the data difference feeding back ACK/NAK information to each layer, and that is to say also needs to feed back a plurality of ACK/NAK information.Mandatory provision in 3GPP2 AIE (AIE) white paper at present: when using MCW, the child node number of distribution must not be less than the coding number of plies of MCW.Can with every layer ACK/NAK information mapping on a plurality of child nodes of being distributed, guarantee the ACK/NAK information that child node is carried one deck, the mechanism of just present feeding back ACK/NAK information like this.
But be to use the good scene of channel condition often of MCW, and under the good scene of channel condition, do not need to distribute a lot of child nodes, but mechanism according to present feeding back ACK/NAK information, even channel condition is relatively good, but because a child node can not be fed back two or more ACK/NAK information, therefore must satisfy constraint " when using MCW, the child node number of distribution must not be less than the MCW number of plies ".In fact, so just must cause the waste of channel resource.Under the situation of channel resource anxiety, can't correctly transmit ACK/NAK information, cause service quality to descend.
As seen, multicarrier system of the prior art under the situation that adopts multiple resource distribution mode to mix, needs a plurality of ACK/NAK information of feedback, adopts prior art can cause the waste of R-ACKCH channel resource.
Summary of the invention
In view of this, main purpose of the present invention is to provide the method for a kind of feeding back ACK/NAK information, under the situation that multiple resource distribution mode mixes, improves R-ACKCH channel resource service efficiency.
Another main purpose of the present invention is to provide a kind of method of the ACK/NAK of reception information, under the situation that multiple resource distribution mode mixes, when improving R-ACKCH channel resource service efficiency, still can make full use of surplus resources, effectively carry out system interference and estimate, guarantee the R-ACKCH quality of channel.
The 3rd main purpose of the present invention is to provide a kind of method that system interference is estimated accuracy that improves, and under the situation that multiple resource distribution mode mixes, effectively improves system interference and estimates accuracy, guarantees the R-ACKCH quality of channel.
Notice that purpose is to provide the device of a kind of feeding back ACK/NAK information, under the situation that multiple resource distribution mode mixes, improve R-ACKCH channel resource service efficiency for the 4th of the present invention.
The 5th main purpose of the present invention is to provide a kind of device of the ACK/NAK of reception information, under the situation that multiple resource distribution mode mixes, when improving R-ACKCH channel resource service efficiency, still can make full use of surplus resources, effectively carry out system interference and estimate, guarantee the R-ACKCH quality of channel.
Be first aspect that achieves the above object, the invention provides the method for a kind of feeding back ACK/NAK information, be used for need feeding back when multiple resource distribution mode mixes the multi-carrier communications systems of a plurality of ACK/NAK information, it is characterized in that this method comprises:
A, the ACK/NAK information that will need to feed back are divided into two or more ACK/NAK information sets according to resource distribution mode;
B, according to the ACK/NAK packets of information, the orthogonal basis of the orthogonal transform that reverse ack channel is adopted is divided into two or more orthogonal basis groups;
C, access terminal when wanting feeding back ACK/NAK information,, determine the orthogonal basis group that adopts, and from this orthogonal basis group, select an orthogonal basis earlier according to the ACK/NAK information sets at this ACK/NAK information place; Utilize this orthogonal basis to carry out orthogonal transform again, the result of orthogonal transform is modulated on the reverse ack channel sends.
Wherein, steps A described will need the ACK/NAK information fed back according to resource distribution mode be divided into two or more ACK/NAK information sets method can for: will be divided into an ACK/NAK information sets with a kind of ACK/NAK information of resource distribution mode correspondence;
The method that the orthogonal basis of the described orthogonal transform that reverse ack channel is adopted of step B is divided into two or more orthogonal basis groups is: the orthogonal basis that same ACK/NAK information sets is adopted is divided into an orthogonal basis group.
Described step B may further include:
A channel resource in the resource distribution mode that each orthogonal basis in each orthogonal basis group is corresponding with it is corresponding;
Among the described step C,, from the orthogonal basis group, select an orthogonal basis according to the corresponding relation of each orthogonal basis and channel resource.
Under the different resource method of salary distribution oppositely in the ack channel group technology of the orthogonal basis of orthogonal transform can arrange in advance and/or in system broadcast message, be broadcast to and access terminal by network side.
The described orthogonal basis that utilizes of step C carries out orthogonal transform, with the result of orthogonal transform be modulated to the method that sends on the reverse ack channel can for:
Earlier determine to send watt resource of ACK/NAK information, on this watt resource, use selected orthogonal basis to carry out orthogonal transform, the result of orthogonal transform is modulated on the reverse ack channel sends.
Send reverse ACK/NAK information watt resource information definite method can for: according to channel resource under the different resource method of salary distribution of agreement in advance and the oppositely corresponding relation, current resource distribution mode and running time-frequency resource positional information of watt resource information used of ack channel, determine to send watt resource sequence number of ACK/NAK information.
This method may further include: network side notice the access terminal position or the logic sequence number of the resource of distributing to this resource distribution mode that accesses terminal and distribution.
Described multiple resource distribution mode can be distributed resource channel DRCH and centralized resources channel BRCH; Network side adopts distributed resource channel DRCH punching piece channel resource BRCH, and/or the resource distribution mode of BRCH punching DRCH; Or
Described multiple resource distribution mode is: channel child node first half resource and channel child node latter half resource; The resource distribution mode that it is the resource allocation granularity that network side adopts with half child node.
Described multi-carrier communications systems adopts beam forming technique, and the data of forward channel send to a plurality of accessing terminal by a plurality of wave beams, and then multiple resource distribution mode is: a plurality of different wave beams.
Be second aspect that achieves the above object, the method that the invention provides a kind of ACK/NAK of reception information is used for need feeding back when multiple resource distribution mode mixes the multi-carrier communications systems of a plurality of ACK/NAK information, it is characterized in that this method comprises:
A, network side carry out conversion and merging to the signal that receives from reverse ack channel, and the result who is combined carries out and sends the pairing inverse transformation of orthogonal transform that ACK/NAK information adopts; And the result of inverse transformation is divided into several ACK/NAK information sequences corresponding with resource distribution mode according to the grouping of orthogonal basis;
Remaining information is defined as the Interference Estimation sequence among B, the result of network side with the inverse transformation of orthogonal transform; And the Interference Estimation value of computing system;
C, network side carry out bit quantization according to the Interference Estimation value of system to the ACK/NAK information sequence, obtain the ACK/NAK information bit.
Wherein, the described result of steps A with inverse transformation be divided into several ACK/NAK information sequences method can for:
To the grouping of the orthogonal basis of orthogonal transform in the reverse ack channel, the information of each orthogonal basis group correspondence among the result of the inverse transformation of orthogonal transform is defined as the ACK/NAK information sequence of respective resources method of salary distribution correspondence according in advance.
If exist in the system some not distribute to any channel resource that accesses terminal and use, then the remaining information among the result of the inverse transformation of orthogonal transform can be the information of the orthogonal basis correspondence that these channel resources use in the result of the inverse transformation of orthogonal transform;
Or, distribute a plurality of channel resources if access terminal to one simultaneously, the agreement agreement adopts the corresponding ACK/NAK information of one of them channel resource feedback, the channel resource of other distribution does not have corresponding ACK/NAK informational needs feedback, and then the remaining information among the result of the inverse transformation of orthogonal transform is: these do not have the information of the orthogonal basis correspondence that channel resources of corresponding A CK/NAK informational needs feedback use in the result of the inverse transformation of orthogonal transform;
Or the remaining information among the result of the inverse transformation of orthogonal transform is the combination of above-mentioned two kinds of situations.
The method of the Interference Estimation value of the described computing system of step B can for: this interference sequence is averaged, with the Interference Estimation value of mean value as system.
Described multiple resource distribution mode can be distributed resource channel DRCH and centralized resources channel BRCH; Network side adopts distributed resource channel DRCH punching piece channel resource BRCH, and/or the resource distribution mode of BRCH punching DRCH; Or
Described multiple resource distribution mode is: channel child node first half resource and channel child node latter half resource; The resource distribution mode that it is the resource allocation granularity that network side adopts with half child node.
Described multi-carrier communications systems adopts beam forming technique, and the data of forward channel send to a plurality of accessing terminal by a plurality of wave beams, and then multiple resource distribution mode is: a plurality of different wave beams.
Be the 3rd aspect that achieves the above object, the invention provides a kind of method that system interference is estimated accuracy that improves, portable terminal and network side are determined the corresponding relation of watt resource information that channel resource and reverse ack channel use, and perhaps determine the method for salary distribution of the son watt resource of watt resource in the reverse ack channel;
Network side the time allows partly or entirely being evenly distributed in the reverse ack channel resource bandwidth as the reverse ack channel resource of Interference Estimation carrying out the channel resource scheduling;
Network side utilizes these to be used as the reverse ack channel resource of Interference Estimation, carries out Interference Estimation.
Wherein, described channel resource logic sequence number can be determined in the following manner with the corresponding relation of watt resource sequence number of reverse ack channel use:
1) resource logic numeric order corresponds to all watts resource, and each watt resource is corresponding to a plurality of continuous resource logic sequence numbers; Each reverse ACK is according to the resource logic sequence number use part watt resource wherein of correspondence; Or
2) resource logic sequence number rems with the number altogether of watt resource, the channel resource that comes to the same thing corresponds to identical watt resource, each watt resource is corresponding to a plurality of discontinuous resource logic sequence numbers, and each reverse ACK at channel resource uses the part watt resource in the described watt of resource to send according to the resource logic sequence number of correspondence; Or
3) resource logic sequence number corresponds on wherein one or more watts resource according to pseudorandom mode, and each reverse ACK uses part watt resource wherein to send according to the resource logic sequence number of correspondence;
4) or above-mentioned 1) or 2) or 3) plant any mixed allocation relation of the relations of distribution.
Described channel resource logic sequence number can be arranged in advance with the corresponding relation of watt resource sequence number that reverse ack channel uses, and/or is broadcast in system broadcast message by network side and accesses terminal.
Described corresponding relation can comprise: watt resource sequence number equals the value that resource logic sequence number rounds then divided by orthogonal basis number in the corresponding orthogonal basis group; And/or the number altogether that watt resource sequence number equals resource logic sequence number die shoe resource is got surplus value then; And/or watt resource sequence number is corresponding with resource logic sequence number in pseudorandom mode.
Can adopt identical or different corresponding relation to the different resource method of salary distribution in the system.
Carry out channel resource at network side and divide timing, can be according to the demand of Interference Estimation, by the corresponding relation of algorithm according to channel resource and each reverse ack channel watt resource, scheduler allows in scheduling as partly or entirely being evenly distributed on the whole watts of included resources of reverse ack channel of the reverse ack channel resource of Interference Estimation, obtains maximum diversity gain.
As the reverse ack channel resource of Interference Estimation, can comprise: system's agreement is used for carrying out the reverse ack channel resource of Interference Estimation specially and those do not need the pairing reverse ack channel resource of channel resource of feeding back ACK/NAK information;
Network side averages these information as the reverse ack channel resource correspondence of Interference Estimation, with the Interference Estimation value of mean value as system.
Oppositely the method for salary distribution of the son watt resource of watt resource can include but not limited in the ack channel:
(4) adopt the distributed resource allocation mode to distribute the R-ACKCH channel;
(5) each the son watt resource with each watt resource in the R-ACKCH channel all is distributed on the different frequency domain bands, whole or most of son watt shared frequency resource non-overlapping copies;
(6) the son watt resource of part watt resource adopts mode (1), and the son watt resource of part watt resource adopts the mixed ways of distribution of mode (2).
Be the 4th aspect that achieves the above object, the present invention proposes the device of a kind of feeding back ACK/NAK information, comprise ACK/NAK information generating unit, orthogonal basis selected cell, orthogonal transform unit and modulating unit;
Described ACK/NAK information generating unit is used to generate ACK/NAK information, and sends to the orthogonal basis selected cell;
Described orthogonal basis selected cell has been stored the ACK/NAK information sets information and the orthogonal basis group information of dividing according to resource distribution mode, it is used for the ACK/NAK information sets according to the ACK/NAK information place that receives, determine the orthogonal basis group of employing, and from this orthogonal basis group, select an orthogonal basis, orthogonal basis and the described ACK/NAK information of selecting is sent to orthogonal transform unit;
The orthogonal basis that described orthogonal transform unit utilization receives carries out orthogonal transform to the ACK/NAK information that receives, and the result of orthogonal transform is sent to modulating unit;
Described modulating unit is modulated to the result of orthogonal transform on the reverse ack channel and sends.
Wherein, described orthogonal transform unit can be the discrete fourier transform unit; Described modulating unit is the fast fourier transform modulating unit.
During this device can be arranged on and access terminal.
Be the 5th aspect that achieves the above object, the invention provides a kind of device of the ACK/NAK of reception information, comprise separate be in harmonious proportion merge cells, orthogonal transform inverse transformation block, sequence selection unit, obtain system interference estimated value unit and quantification treatment unit;
Described separating is in harmonious proportion merge cells and is used to receive reverse ack channel signal and separates to be in harmonious proportion and merge, and the result that will merge sends to the inverse transformation block of orthogonal transform;
The result that the inverse transformation block of described orthogonal transform is used to be combined carries out and sends the corresponding inverse transformation of orthogonal transform that ACK/NAK information adopts, and the inverse transformation result of orthogonal transform is sent to the sequence selection unit;
The ACK/NAK information sets information and the orthogonal basis group information of dividing according to resource distribution mode has been stored in described sequence selection unit, and it is used for the information of each orthogonal basis group correspondence as a result of the inverse transformation of orthogonal transform is defined as the ACK/NAK information sequence of respective resources method of salary distribution correspondence.
Described sequence selection unit further is defined as interference sequence with remaining information among the result of the inverse transformation of orthogonal transform, sends to and obtains system interference estimated value unit, and the ACK/NAK information sequence is sent to the quantification treatment unit;
The described system interference value cell that obtains is used for calculating the system interference estimated value according to interference sequence, and this system interference estimated value is sent to the quantification treatment unit;
Described quantification treatment unit is used for according to the system interference estimated value ACK/NAK information sequence being carried out bit quantization, obtains the ACK/NAK information bit.
Wherein, the inverse transformation block of described orthogonal transform can be discrete Fourier inverse transformation unit; The described mediation merge cells of separating comprises the inverse fast fourier transform demodulation module.
This device can be arranged on network side.
As seen from the above technical solutions, the method and apparatus of this feedback of the present invention and reception ACK/NAK information, when being used for back-up system and adopting the resource allocation policy that two or more resource distribution modes mix, system need feed back the situation of a plurality of ACK/NAK information bits simultaneously, the present invention adopts ACK/NAK information to divide into groups, and on the same group ACK/NAK information not, in the orthogonal basis group of correspondence, select the different orthogonal base to carry out orthogonal transform, modulate same reverse ack channel and send.The signal that network side receives on to reverse ack channel separate be in harmonious proportion merge after, adopt corresponding inverse orthogonal transformation, obtain ACK/NAK information.Like this, when system adopts the resource allocation policy of two or more resource distribution modes mixing, owing to will adopt different orthogonal base group to carry out the ACK/NAK information of orthogonal transform, be modulated on the identical R-ACKCH, naturally stack when R-ACKCH aloft transmits, therefore under the situation that does not increase overhead, the ACK/NAK information of multiple resource distribution mode correspondence that made full use of present R-ACKCH resource transmission.
In addition, raising system interference provided by the invention is estimated the method for accuracy, under the situation that multiple resource distribution mode mixes, network side allows when channel resource is dispatched on all watts resource that partly or entirely is evenly distributed on R-ACKCH channel resource bandwidth as the R-ACKCH channel resource of Interference Estimation as far as possible, thereby obtain maximum diversity gain, network side just can make full use of these resources to carry out Interference Estimation and improves the estimation order of accuarcy of system interference value with this.
Description of drawings
Fig. 1 is for adopting the subcarrier allocation schematic diagram of BRCH mode;
Fig. 2 is for adopting the subcarrier allocation schematic diagram of DRCH mode;
Fig. 3 is for adopting the subcarrier allocation schematic diagram of DRCH punching BRCH mode;
Fig. 4 is for adopting the subcarrier allocation schematic diagram of BRCH punching DRCH mode;
Fig. 5 is watt resource and son watt resources relationship figure;
Fig. 6 is prior art AT feeding back ACK/NAK information processing schematic flow sheet;
Fig. 7 is prior art AT feeding back ACK/NAK information processing block diagram;
Fig. 8 receives ACK/NAK information processing block diagram for prior art AN;
Fig. 9 is the typical channel trees schematic diagram of in the multicarrier system;
Figure 10 is the AT feeding back ACK/NAK information processing schematic flow sheet of the present invention's first preferred embodiment;
Figure 11 is AT feeding back ACK/NAK information processing block diagram embodiment illustrated in fig. 10;
Figure 12 receives ACK/NAK information processing block diagram for the AN of the present invention's second preferred embodiment;
Figure 13 is the feeding back ACK/NAK massaging device schematic diagram of the present invention's the 3rd preferred embodiment;
Figure 14 is the device schematic diagram of the reception ACK/NAK information of the present invention's the 4th preferred embodiment.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
The method and apparatus of this feedback of the present invention and reception ACK/NAK information, adopt ACK/NAK information to divide into groups, and on the same group ACK/NAK information not, in the orthogonal basis group of correspondence, select the different orthogonal base to carry out orthogonal transform, modulate same reverse ack channel and send.The signal that network side receives on to reverse ack channel separate be in harmonious proportion merge after, adopt corresponding inverse orthogonal transformation, obtain ACK/NAK information.
Below receiving ACK/NAK information with AT feeding back ACK/NAK information and AN respectively is embodiment, and the present invention is described in detail at the system that adopts BRCH with DRCH mixing resource dispatching strategy; Simultaneously, in an embodiment, also the method that improves system interference value accuracy is had been described in detail.But the present invention can be applicable to that all adopt to mix the multi-carrier communications systems of resource distribution modes, is not limited to the system of this use BRCH and DRCH mixing resource dispatching strategy.
In following examples, be that example describes, but following examples are by after revising suitable parameter, still applicable to OFDMA system and other multi-carrier communications systems of any FFT size with the OFDMA system of 512 FFT.Parameter described here includes but not limited to: the orthogonal transform dimension that the ACK/NAK number of transmission, R-ACKCH use in the size of the wattage order of R-ACKCH, watt shared resource, each watt of R-ACKCH etc.
In the OFDMA of 512 FFT system, the R-ACKCH channel comprises 4 watts, and each watt comprises 4 sons watt, and system selects 16 rank discrete fourier transforms that ACK/NAK information is carried out orthogonal transform, has 16 orthogonal basiss.For the multi-carrier communications systems of in the R-ACKCH channel, selecting the orthogonal transform of other type, by 16 rank discrete fourier transforms in following examples being replaced with corresponding orthogonal transform, the orthogonal basis of 16 rank discrete fourier transforms is replaced with the orthogonal basis of corresponding orthogonal transform, and this patent still can be suitable for.
System is divided into two groups with the orthogonal basis of 16 rank discrete fourier transforms: the first group of orthogonal basis that is used to feed back forward BRCH corresponding A CK/NAK information, with the second group of orthogonal basis that is used to feed back forward DRCH corresponding A CK/NAK information, the division of these two groups of orthogonal basiss can be arranged among AN and the AT by the mode that agreement is arranged in advance, and/or this kind mode is broadcasted in system broadcast channel.
Wherein, every group of orthogonal basis comprises with another and organizes nonoverlapping 8 orthogonal basiss.Can from the orthogonal basis of 16 rank discrete fourier transforms, select 8 orthogonal basiss to be defined as being used to feed back first group of orthogonal basis of forward BRCH corresponding A CK/NAK information arbitrarily; All the other 8 orthogonal basiss are defined as being used to feed back the second group orthogonal basis of forward DRCH to ACK/NAK information.
The mode of above-mentioned this grouping includes but not limited to following several:
(1) preceding 8 orthogonal basiss of 16 rank discrete fourier transforms is defined as being used to feed back first group of orthogonal basis of forward BRCH corresponding A CK/NAK information; Back 8 orthogonal basiss of 16 rank discrete fourier transforms are defined as being used to feed back second group of orthogonal basis of forward DRCH corresponding A CK/NAK information;
(2) will ask mould to 2 in the 16 rank discrete fourier transforms, remainder equals first group of orthogonal basis that 8 orthogonal basiss of 0 are defined as being used to feed back forward BRCH corresponding A CK/NAK information; Remainder equals second group of orthogonal basis that 8 orthogonal basiss of 1 are defined as being used to feed back forward DRCH corresponding A CK/NAK information;
(3) adopt pseudorandom mode that 16 orthogonal basiss of 16 rank discrete fourier transforms are divided into two groups, every group of 8 orthogonal basiss, the orthogonal basis of two groups is not overlapping mutually.
In following examples, first group of orthogonal basis that preceding 8 orthogonal basiss are defined as being used to feed back 8 forward BRCH corresponding A CK/NAK information will be primarily aimed at, the packet mode that 8 orthogonal basiss in back are defined as being used to feeding back second group of orthogonal basis of 8 forward DRCH corresponding A CK/NAK information is introduced, but following examples still go for above-mentioned various packet mode by the replacement to the orthogonal basis packet mode.
As previously mentioned, in the OFDMA of 512 FFT system, system takies the 5M bandwidth, and whole bandwidth can be divided into 32 BRCH and DRCH channel resource, and R-ACKCH comprises 4 watts of resources, and these 4 watts of resources are evenly distributed in the whole backward channel bandwidth.
First preferred embodiment:
Referring to Figure 10, Figure 10 is the AT feeding back ACK/NAK information processing schematic flow sheet of the present invention's first preferred embodiment.This flow process may further comprise the steps:
Step 101, AT determines the ACK/NAK value of information of this forward BRCH or forward DRCH correspondence according to the situation of the distribution of channel resource.
Step 102, AT judges that according to the channel resource information and the channel resource method of salary distribution that AN distributes this ACK/NAK information is corresponding with BRCH or corresponding with DRCH; If corresponding with BRCH, then execution in step 103; If corresponding then execution in step 107 with DRCH.
In this step, AT can be according to the distribution forward BRCH that goes up the AN transmission that receives at forward shared control channel (F-SCCH) or the assignment message of forward DRCH resource, what determine self to be assigned with is forward BRCH or forward DRCH resource, and determines and forward BRCH that distributes to self or the corresponding ACK/NAK information of forward DRCH resource.
Step 103 according to watt resource sequence number of agreement and the corresponding relation of forward BRCH channel logo in advance, obtains being used to transmitting watt resource sequence number of the ACK/NAK information of this forward BRCH channel correspondence, i.e. the Tile sequence number.
Step 104 selects an orthogonal basis k to be used for this channel resource from BRCH orthogonal basis group by calculating, and the value of k equals the remainder of channel resource sequence number to the number delivery of the orthogonal basis that comprises in this BRCH orthogonal basis group, that is: k=mod (i, 8).
Step 105 selects k the orthogonal basis and the ACK/NAK value of information to carry out computing, and the result of computing is one 16 a symbol sebolic addressing.
In this step, the type of orthogonal transform is depended in concrete computing, if adopt the DFT orthogonal transform, then this computing is the vector multiplication computing, i.e. 16 rank discrete fourier transforms; If system adopts the Walsh sequence to carry out orthogonal transform, then this computing is Walsh spread spectrum computing etc.
Here step 103 is relations arranged side by side with step 104, can carry out in proper order, also can executed in parallel.
Because present embodiment is the first group of orthogonal basis that preceding 8 orthogonal basiss of 16 rank discrete fourier transforms is defined as being used to feed back forward BRCH corresponding A CK/NAK information, therefore can adopt the mode of step 104 to select orthogonal basis;
To ask mould to 2 in the 16 rank discrete fourier transforms if in the practice be, remainder equals 8 orthogonal basiss of 0 and is defined as first group of orthogonal basis, then above-mentioned steps 104 also can be implemented with following mode: select an orthogonal basis k to be used for this channel resource from BRCH orthogonal basis group by calculating, the value of k equals channel resource sequence number 2 times to the remainder of the number delivery of the orthogonal basis that comprises in this BRCH orthogonal basis group, that is: k=2*mod (i, 8);
Be defined as first group of orthogonal basis if in the practical application be according to 8 orthogonal basiss that pseudorandom mode is selected, then above-mentioned steps 104 also can be implemented with following mode: select an orthogonal basis k to be used for this channel resource from BRCH orthogonal basis group by calculating, the value of k is with identical pseudo-random fashion, calculates according to this channel resource sequence number.
Step 106 is modulated to 16 symbol sebolic addressings on the definite Tile resource of step 103, and carries out 4 rank and repeat, and the method for repetition includes but not limited to:
(1) on 4 SubTile of identical Tile, carries out repetition;
(2) on the different SubTile of 4 Tile, carry out repetition respectively, promptly on k the SubTile of the individual Tile of k (0＜=k＜=3), carry out repetition;
(3) adopting pseudorandom mode to carry out 4 rank in 4 Tile repeats.
Modulator approach in this step and step 605 shown in Figure 6 are identical, no longer repeat here.Execution in step 111 then.
Step 107 according to watt resource sequence number of agreement and the corresponding relation of forward DRCH channel logo in advance, obtains being used to transmitting watt resource sequence number of the transmission ACK/NAK information of this forward DRCH channel correspondence, i.e. the Tile sequence number.
Step 108 selects an orthogonal basis k to be used for this channel resource from DRCH orthogonal basis group by calculating, and the value of k equals the remainder of channel resource sequence number to the number delivery of the orthogonal basis that comprises in this DRCH orthogonal basis group, that is: k=mod (i, 8).
Step 109, the result who selects k+8 the orthogonal basis and the ACK/NAK value of information to carry out the computing computing are one 16 symbol sebolic addressing.
Equally, the type of orthogonal transform is depended in concrete computing, if adopt the DFT orthogonal transform, then this computing is the vector multiplication computing, i.e. 16 rank discrete fourier transforms; If system adopts the Walsh sequence to carry out orthogonal transform, then this computing is Walsh spread spectrum computing etc.
Here step 107 is relations arranged side by side with step 108, can carry out in proper order, also can executed in parallel.Because present embodiment is the second group of orthogonal basis that back 8 orthogonal basiss of 16 rank discrete fourier transforms is defined as being used to feed back forward DRCH corresponding A CK/NAK information, therefore can adopt the mode of step 108 to select orthogonal basis;
To ask mould to 2 in the 16 rank discrete fourier transforms if in the practice be, remainder equals 8 orthogonal basiss of 1 and is defined as second group of orthogonal basis, then above-mentioned steps 108 also can be implemented with following mode: select an orthogonal basis k to be used for this channel resource from DRCH orthogonal basis group by calculating, the value of k equals the channel resource sequence number to 2 extraordinarily one of the remainder of the number delivery of the orthogonal basis that comprises in this DRCH orthogonal basis group, that is: k=2*mod (i, 8)+1;
Be defined as second group of orthogonal basis if in the practical application be according to 8 orthogonal basiss that pseudorandom mode is selected, then above-mentioned steps 108 also can be implemented with following mode: select an orthogonal basis k to be used for this channel resource from DRCH orthogonal basis group by calculating, the value of k is with identical pseudo-random fashion, calculates according to this channel resource sequence number.
Step 110 is modulated to 16 symbol sebolic addressings on the definite Tile resource of step 107, and carries out 4 rank and repeat, and the method for repetition includes but not limited to:
(1) on 4 SubTile of identical Tile, carries out repetition;
(2) on the different SubTile of 4 Tile, carry out repetition respectively, promptly on k the SubTile of the individual Tile of k (0＜=k＜=3), carry out repetition;
(3) adopting pseudorandom mode to carry out 4 rank in 4 Tile repeats.
Modulator approach in this step and step 605 shown in Figure 6 are identical, no longer repeat here.
Step 111 sends to AN with the information on the R-ACKCH after the described modulation.
Figure 11 has represented the transmitter processes block diagram of the AT side of above-mentioned flow process correspondence: if certain AT has been assigned with BRCH (32, i) channel resource, and the words that need feeding back ACK/NAK information, this AT uses the orthogonal basis of k orthogonal transform to carry out conversion ACK/NAK information, the similar step 104 of the computational methods of k obtains a Tile sequence number according to certain formula then, and the symbol sebolic addressing after the conversion is filled on the corresponding Tile, and carry out 4 rank and repeat the similar step 106 of the method for repetition or 110.
If certain AT has been assigned with DRCH (32, i) channel resource, and the words that need feeding back ACK/NAK information, then this AT uses the orthogonal basis of k orthogonal transform to carry out orthogonal transform ACK/NAK information, the similar step 108 of the computational methods of k obtains a Tile sequence number according to certain computing formula then, and the symbol sebolic addressing after the conversion is filled on the corresponding Tile, and carry out 4 rank and repeat the similar step 106 of the method for repetition or 110.
Each AT independently adopts top flow process to send the ACK/NAK information of self correspondence, and these information have been carried out natural stack when eating dishes without rice or wine to transmit.From the AN side, the output result of these orthogonal transforms superposes on identical watt resource simultaneously, according to the orthogonal property of orthogonal transform, the differentiation that receiving terminal can be correct they.
Simultaneously, adopt the accuracy that can improve the system interference estimation in the following method: AT and AN determine certain corresponding relation of watt resource information that channel resource and R-ACKCH channel use according to the demand of Interference Estimation.AN the time allows partly or entirely being evenly distributed in the R-ACKCH channel resource bandwidth of the R-ACKCH channel resource that can be used as Interference Estimation as far as possible carrying out the channel resource scheduling.AN makes full use of these when carrying out Interference Estimation can be as the reverse ack channel resource of Interference Estimation, with the accuracy of enhanced system Interference Estimation.
Wherein, those can include but not limited to as the reverse ack channel resource of Interference Estimation:
(1) if exist some not distribute to any channel resource that accesses terminal and use in the system, then can be as the reverse ack channel resource of Interference Estimation: these distribute to the information of the orthogonal basis correspondence of any channel resource of using of accessing terminal;
(2) if accessing terminal to one simultaneously, system distributed a plurality of channel resources, the agreement agreement adopts the corresponding ACK/NAK information of one of them channel resource feedback, the channel resource of other distribution does not have corresponding ACK/NAK informational needs feedback, then can be as the reverse ack channel resource of Interference Estimation: the information of the orthogonal basis correspondence that these channel resources that do not have corresponding A CK/NAK informational needs to feed back use;
(3) combination that can be above-mentioned two kinds of situations as the reverse ack channel resource of Interference Estimation.
Concrete, can be to these as the information on the reverse ack channel resource of Interference Estimation, AN carries out them that certain is average, and averaged result is used as the Interference Estimation value of system, by utilizing the diversity gain effect, improves the accuracy that system interference is estimated.
Simultaneously, according to the demand of Interference Estimation, AT and AN determine that the method for the corresponding relation of watt resource sequence number that channel resource sequence number and R-ACKCH channel use can include but not limited to:
1) resource logic numeric order corresponds to all watts resource, and each watt is corresponding to a plurality of continuous resource logic sequence numbers; Each reverse ACK uses the part watt resource in the described watt of resource to send according to the resource logic sequence number of correspondence, mathematical expression is: watt resource sequence number Tile equals the value that resource logic sequence number i rounds then divided by orthogonal basis number N in the corresponding orthogonal basis group, that is: Tile=[i/N];
2) resource logic sequence number rems with the number altogether of watt resource, the channel resource that comes to the same thing corresponds to identical watt resource, each watt resource is corresponding to a plurality of discontinuous resource logic sequence numbers, each reverse ACK at channel resource uses the part watt resource in the described watt of resource to send according to the resource logic sequence number of correspondence, mathematical expression is: watt resource sequence number Tile equals the value that the M of number altogether of resource logic sequence number i die shoe resource gets remainder then, be Tile=mod (i, M);
3) resource logic sequence number corresponds on wherein one or more watts resource according to pseudorandom mode, and each reverse ACK uses part watt resource wherein to send according to the resource logic sequence number of correspondence;
4) above-mentioned 1) or 2) or 3) plant any mixing of corresponding relation.
Wherein operator [*] is represented rounding operation down, and promptly [*] equals to be not more than the maximum integer of *.The Tile numbering is since 0, and resource logic sequence number is also from 0 open numbering, and is as follows
And, for the different resource distribution mode in the same system, can select identical corresponding relation, also can select different corresponding relations.
Particularly,,, determine the Tile sequence number, can adopt following corresponding method according to the corresponding relation of predetermined watt resource sequence number and forward BRCH or forward DRCH sign at BRCH or DRCH user:
Method one: Tile BRCH=[i/8], Tile DRCH=[i/8] promptly adopts above-mentioned corresponding relation (1) to BRCH and DRCH resource distribution mode;
Method two: Tile BRCH=[i/8], Tile DRCH=mod (i, 4) promptly adopts above-mentioned corresponding relation (1) to the BRCH resource distribution mode, and the DRCH resource distribution mode is adopted above-mentioned corresponding relation (2);
Method three: Tile BRCH=mod (i, 4), Til DRCH=[i/8] promptly adopts above-mentioned corresponding relation (2) to the BRCH resource distribution mode, and the DRCH resource distribution mode is adopted above-mentioned corresponding relation (1);
Method four: Tile BRCH=mod (i, 4), Tile DRCH=mod (i, 4) promptly adopts above-mentioned corresponding relation (2) to BRCH and DRCH resource distribution mode;
Below the OFDMA system that adopts 512 FFT conversion is illustrated four kinds of top methods:
Method one, as shown in table 1:
BRCH(32，i) DRCH(32，i)
Tile#0 0，1，2，3，4，5，6，7 0，1，2，3，4，5，6，7
Tile#1 8，9，10，11，12，13，14，15 8，9，10，11，12，13，14，15
Tile#2 16，17，18，19，20，21，22，23 16，17，18，19，20，21，22，23
Tile#3 24，25，26，27，28，29，30，31 24，25，26，27，28，29，30，31
Table 1
Method two, as shown in table 2:
BRCH(32，i) DRCH(32，i)
Tile#0 0，1，2，3，4，5，6，7 0，4，8，12，16，20，24，28
Tile#1 8，9，10，11，12，13，14，15 1，5，9，13，17，21，25，29
Tile#2 16，17，18，19，20，21，22，23 2，6，10，14，18，22，26，30
Tile#3 24，25，26，27，28，29，30，31 3，7，11，15，19，23，27，31
Table 2
Method three, as shown in table 3:
BRCH(32，i) DRCH(32，i)
Tile#0 0，4，8，12，16，20，24，28 0，1，2，3，4，5，6，7
Tile#1 1，5，9，13，17，21，25，29 8，9，10，11，12，13，14，15
Tile#2 2，6，10，14，18，22，26，30 16，17，18，19，20，21，22，23
Tile#3 3，7，11，15，19，23，27，31 24，25，26，27，28，29，30，31
Table 3
Method four, as shown in table 4:
BRCH(32，i) DRCH(32，i)
Tile#0 0，4，8，12，16，20，24，28 0，4，8，12，16，20，24，28
Tile#1 1，5，9，13，17，21，25，29 1，5，9，13，17，21，25，29
Tile#2 2，6，10，14，18，22，26，30 2，6，10，14，18，22，26，30
Tile#3 3，7，11，15，19，23，27，31 3，7，11，15，19，23，27，31
Table 4
Because those do not distribute to the disturbed condition on this watt resource that information transmitted on the DFT orthogonal basis of the BRCH that do not have corresponding A CK/NAK informational needs feedback in a plurality of channel resources that BRCH that any AT uses or DRCH resource and those distribute to same AT or DRCH resource correspondence can be used for estimating R-ACKCH, system carries out the disturbed condition on all watts resource that certain is average then, just can obtain the Interference Estimation value of whole system.Like this, if BRCH and DRCH resource corresponding on certain watt resource all need to feed back corresponding ACK/NAK information, just do not have on this watt resource so can be used for having carried out the signal of Interference Estimation, thereby certainly will reduce the order of accuarcy of whole system the estimation of interference.Therefore, need to allow as much as possible partly or entirely being evenly distributed in the reverse ack channel resource bandwidth in actual applications as the reverse ack channel resource of Interference Estimation, obtain the diversity gain of Interference Estimation information with this, thereby improve the order of accuarcy of the Interference Estimation value of system.
Again because, system is the order continuous dispensing that increases according to the DRCH channel designator when distributing DRCH in DRCH punching BRCH pattern; System also is the order continuous dispensing that increases according to the BRCH channel designator when distributing BRCH in BRCH punching DRCH pattern.Therefore, adopt computing formula Tile BRCH=mod (i, 4) or Tile DRCH=mod (i, 4) just can guarantee most possibly that same watt of BRCH and the DRCH resource on the resource all do not distributed to AT and used, therefore can allow partly or entirely being evenly distributed in the reverse ack channel resource bandwidth as the reverse ack channel resource of Interference Estimation.So the computing formula of four kinds of corresponding relations that propose is above recommended using method four.But do not limit other method of using, four kinds of methods can both operate as normal, and its difference is the order of accuarcy of possible system interference estimated value.
The method that it may be noted that the accuracy of the raising system interference estimation that this patent proposes is not limited to adopt said method to realize, in fact can also adopt other mode to realize, includes but not limited to following several:
(7) adopt the distributed resource allocation mode to distribute the R-ACKCH channel.
(8) each the son watt resource with each watt resource in the R-ACKCH channel all is distributed on the different frequency bands, whole or most of son watt shared frequency resource non-overlapping copies.
(9) part watt resource adopts mode (1), and part watt resource adopts the mixed ways of distribution of mode (2).
By top variety of way, watt resource that can both guarantee major part or all R-ACKCH all uniform distribution in the whole system bandwidth, can realize equally will partly or entirely being evenly distributed in the reverse ack channel resource bandwidth as the reverse ack channel resource of Interference Estimation, obtain the purpose of the diversity gain of Interference Estimation information with this, thereby reach the target of order of accuarcy of the Interference Estimation value of raising system.
Second preferred embodiment:
Referring to Figure 12, Figure 12 receives ACK/NAK information processing block diagram for the AN of the present invention's second preferred embodiment.As seen from Figure 12, the signal that AN receives from radio frequency passes through after the Base-Band Processing, and to the symbol after handling, SubTile recurring rule by appointment merges 4 SubTile.With the input of the result after merging as the inverse transformation of orthogonal transform, carry out inverse transformation, this positive alternation is contrary, and change need to send the kind of the orthogonal transform of selecting in the ACK/NAK information processing identical with AT: if AT selects the DFT conversion when sending ACK/NAK, then be inversely transformed into IDFT herein; If select the Walsh conversion when AT sends ACK/NAK, then be inversely transformed into Walsh herein and separate the spread spectrum computing.
Among the inverse transformation output result, those can be as the inverse transformation result of the R-ACKCH channel resource correspondence of Interference Estimation as Interference Estimation information; Remove after the Interference Estimation sequence, the effective information bit among the output result of the inverse transformation corresponding with BRCH orthogonal basis group is as the corresponding ACK/NAK information sequence of BRCH Traffic Channel; Remove after the Interference Estimation sequence, the effective information bit among the output result of the inverse transformation corresponding with DRCH orthogonal basis group is as the corresponding ACK/NAK information sequence of DRCH Traffic Channel.Then the Interference Estimation sequence is averaged,, according to the Interference Estimation value of system the ACK/NAK information sequence is carried out bit quantization at last, obtain the ACK/NAK information bit of corresponding channel resource the Interference Estimation value of mean value as system.
Specifically, after AN receives whole R-ACKCH information, just can obtain the ACK/NAK information bit of each forward BRCH that need feed back corresponding A CK/NAK information and forward DRCH channel resource correspondence according to following mode:
AN is the base station normally, at first the R-ACKCH signal that receives from radio frequency is carried out Base-Band Processing, SubTile recurring rule according to system's agreement merges 4 SubTile that belong to same Tile then, so just can obtain 16 symbolic information that each watt resource transmits.
Then, 16 symbols of each watt resource are carried out the inverse transformation of orthogonal transform, orthogonal transform need to send the kind of the orthogonal transform of selecting in the ACK/NAK information processing identical with AT.
Again can be as the result of the inverse transformation of the R-ACKCH channel resource correspondence of Interference Estimation as the Interference Estimation sequence with those; Remove after the Interference Estimation sequence, according to the mapping relations Tile of watt resource sequence number and forward BRCH channel resource sequence number BRCH=f BRCH(i), obtain the BRCH channel designator BRCH of the effective ACK/NAK correspondence of transmission in this watt resource k=g BRCH(Tile), k=0,1 ..., 7, the method for obtaining is seen below description; Remove after the Interference Estimation sequence, according to the mapping relations Tile of watt resource sequence number and forward DRCH channel resource sequence number DRCH=f DRCH(i), obtain the DRCH channel designator DRCH of the effective ACK/NAK correspondence of transmission in this watt resource k=g DRCH(Tile), k=0,1 ..., 7, the method for obtaining is seen below description.
In fact, also can determine corresponding SubTile according to forward BRCH or forward DRCH channel resource sequence number earlier, again 16 symbols of each Tile be carried out the inverse transformation of orthogonal transform, the front and back order that this two step carries out, can not have any impact, can arbitrarily determine the result.
Like this, the Interference Estimation sequence is averaged according to certain average rule, as the Interference Estimation value of this watt resource correspondence.Interference Estimation value on all watts resource that will obtain again averages according to certain average rule, as the Interference Estimation value of this system.
Then, if in the practice be the first group of orthogonal basis that preceding 8 orthogonal basiss of orthogonal transform is defined as being used to feed back forward BRCH corresponding A CK/NAK information, 8 orthogonal basiss in back are defined as being used to feed back second group of orthogonal basis of forward DRCH corresponding A CK/NAK information, then remove after the Interference Estimation sequence, the result of the inverse transformation of the orthogonal transform of effective orthogonal basis correspondence is exactly BRCH (BRCHk in preceding 8 orthogonal basiss, k=0,1, ..., 7) in the ACK/NAK information sequence of efficient resource channel correspondence; The result of the inverse transformation of the orthogonal transform of effective orthogonal basis correspondence is exactly DRCH (DRCH in 8 orthogonal basiss in back k, k=0,1 ..., 7) in the ACK/NAK information sequence of efficient resource channel correspondence.
If in the practice be the orthogonal basis sequence number of orthogonal transform is asked mould to 2, remainder equals 8 orthogonal basiss of 0 and is defined as first group of orthogonal basis, remainder equals 8 orthogonal basiss of 1 and is defined as second group of orthogonal basis, then above-mentioned steps also can be implemented with following mode: remove after the Interference Estimation sequence, the orthogonal basis sequence number is asked mould to 2, and remainder equals in 8 orthogonal basiss of 0 effectively that the result of the inverse transformation of the orthogonal transform of orthogonal basis correspondence is exactly BRCH (BRCH k, k=0,1 ..., 7) in the ACK/NAK information sequence of efficient resource channel correspondence; The orthogonal basis sequence number is asked mould to 2, and remainder equals in 8 orthogonal basiss of 1 effectively that the result of the inverse transformation of the orthogonal transform of orthogonal basis correspondence is exactly DRCH (DRCH k, k=0,1 ..., 7) in the ACK/NAK information sequence of efficient resource channel correspondence;
Be defined as first group of orthogonal basis if in the practical application be according to 8 orthogonal basiss that pseudorandom mode is selected, other 8 orthogonal basiss are defined as second group of orthogonal basis, then above-mentioned steps also can be implemented with following mode: remove after the Interference Estimation sequence, according to identical pseudo-random fashion, according to BRCH (BRCH k, k=0,1 ..., 7) in 8 orthogonal basis sequence numbers calculating of channel resource sequence number effectively the result of the inverse transformation of the orthogonal transform of orthogonal basis correspondence be exactly BRCH (BRCH k, k=0,1 ..., 7) in the ACK/NAK information sequence of efficient resource channel correspondence; According to identical pseudo-random fashion, according to DRCH (DRCH k, k=0,1 ..., 7) in 8 orthogonal basis sequence numbers calculating of channel resource sequence number effectively the result of the inverse transformation of the orthogonal transform of orthogonal basis correspondence be exactly DRCH (DRCH k, k=0,1 ..., 7) in the ACK/NAK information sequence of efficient resource channel correspondence.
At last, Interference Estimation value according to system has the forward BRCH of corresponding A CK/NAK informational needs feedback or the ACK/NAK information sequence of forward DRCH channel resource to carry out bit quantization to those, and the result of its quantification is exactly the forward BRCH of correspondence or the ACK/NAK information bit of forward DRCH channel resource.
All be not assigned to the situation that AT uses owing to can not occur whole BRCH and DRCH resource in the system simultaneously, therefore the orthogonal basis that certainly exists some in the system is not used for carrying out transferring ACK/NAK information bit, therefore just can utilize these orthogonal basiss to carry out Interference Estimation.So adopt technology provided by the invention, can not influence the normal operation of whole system.
But after the method for the levels of precision of the raising system interference estimated value that adopts the present invention to propose, AN can allow as much as possible those can all watts resource that partly or entirely is evenly distributed on R-ACKCH channel resource bandwidth as the R-ACKCH channel resource of Interference Estimation on, AN just can make full use of these when carrying out Interference Estimation can be as the reverse ack channel resource of Interference Estimation, obtain maximum diversity gain effect, reach the effect of the order of accuarcy of enhanced system Interference Estimation.
Adopted the method for order of accuarcy of the raising system interference estimated value that this patent proposes when system after, calculate the forward BRCH of the ACK/NAK information correspondence that may transmit in this watt resource and the method for forward DRCH channel designator is according to watt resource sequence number Tile:
If system's agreement employing method one, then:
BRCH k＝Tile*8+k，k＝0，1，...，7；DRCH k＝Tile*8+k，k＝0，1，...，7
If system's agreement adopts method two, then:
BRCH k＝Tile*8+k，k＝0，1，...，7；DRCH k＝Tile+4*k，k＝0，1，...，7
If system's agreement employing method three, then:
BRCH k＝Tile+4*k，k＝0，1，...，7；DRCH k＝Tile*8+k，k＝0，1，...，7
If system's agreement employing method four, then:
BRCH k＝Tile+4*k，k＝0，1，...，7；DRCH k＝Tile+4*k，k＝0，1，...，7
Above-mentioned formula is to the inverse operation of preceding method one to method four listed formula, wherein: in the formula, the value of watt resource sequence number is since 0, i.e. Tile=0,1,2,3; Channel resource sequence number value is since 0, i.e. k=0, and 1 ..., 7.Certainly, this patent does not limit the value starting point of sequence number, and numbering can be from arbitrary value, only needs to revise some constant in the above-mentioned formula, consistent the getting final product of the method for salary distribution that the result of calculation that guarantees formula and table 1 are enumerated to the table 4.
In the foregoing description, all the OFDMA system with 512 subcarriers is an example, and the OFDMA system of other FFT sizes can adopt in the same way and realize, no longer repeats here.
The 3rd preferred embodiment:
System uses after the beam forming technique, system is provided with a plurality of wave beams, each forward channel can send data with one or more wave beams of system's setting, be independently between these wave beams, can distribute to different AT uses, the corresponding wave beam feeding back ACK/NAK information of the corresponding forward channel that each AT need use self, each wave beam is thought a kind of resource distribution mode, whole system has adopted multiple resource distribution mode mixing resource allocation policy like this, and simultaneity factor need be fed back a plurality of ACK/NAK information.
Suppose that system comprises 3 wave beams, present embodiment is by revising suitable constant, for example after the wave beam number etc., can be applicable to the scene of any wave beam, and forward traffic channel can be divided into 3 groups so: the forward traffic channel of wave beam one correspondence constitutes first group; The forward traffic channel of wave beam two correspondences constitutes second group; The forward traffic channel of wave beam three correspondences constitutes the 3rd group.
The ACK/NAK information that AT need feed back also is divided into three groups: the ACK/NAK information at wave beam one is first group; ACK/NAK information at wave beam two is second group; ACK/NAK information at wave beam three is the 3rd group.
Adopt the channel architecture of R-ACKCH as described before, the Tile of each R-ACKCH adopts 16 rank DFT conversion, AN and AT agreement adopt wherein, and 5 DFT orthogonal basiss transmit first group of ACK/NAK information, other 5 DFT orthogonal basiss transmit second group of ACK/NAK information, other 5 DFT orthogonal basiss transmit the 3rd group of ACK/NAK information, remain a DFT orthogonal basis and are used as Interference Estimation jointly with those DFT orthogonal basiss without the channel resource correspondence of feeding back ACK/NAK information.Here channel resource is next unique definite by forward channel sequence number i and wave beam sequence number j, and channel resource has following two kinds of situations without the channel resource of ACK/NAK information:
First kind: a wave beam of certain forward channel is not distributed to any AT and is used, and does not then need to feed back the ACK/NAK information of this wave beam correspondence of this forward channel.
Second kind: disposable certain AT that gives of system has distributed a plurality of channel resources, the agreement agreement adopts one of them channel resource, the channel resource of forward channel sequence number i or wave beam sequence number j minimum for example, corresponding R-ACKCH feeds back the ACK/NAK information of this AT, and then not needing to feed back other channel resource of distributing to this AT does not have corresponding ACK/NAK information.
A feasible packet mode is as shown in table 5:
The DFT orthogonal basis ACK/NAK information
ACK/NAK group one DFT orthogonal basis 0～4 The ACK/NAK information that first group of resource distribution mode (wave beam one) is corresponding
ACK/NAK group two DFT orthogonal basis 5～9 The ACK/NAK information that second group of resource distribution mode (wave beam two) is corresponding
ACK/NAK group three DFT orthogonal basis 10～14 The ACK/NAK information that the 3rd group of resource distribution mode (wave beam three) is corresponding
DFT orthogonal basis 15 and those DFT orthogonal basiss without the channel resource correspondence of feeding back ACK/NAK information Interference Estimation
Table 5
The corresponding relation of this channel resource sequence number and DFT sequence number is by AN and AT agreement, and in agreement regulation and/or in system broadcasts, broadcast.
Like this, AT just can calculate the position of ACK/NAK information in R-ACKCH of its correspondence according to the channel resource sequence number of self distributing, particularly: suppose that channel resource that this AT distributes is j the wave beam (i=0 wherein of i forward traffic channel, 1,2..., j=1,2,3...), the ACK/NAK information of this AT feedback just should go up at [i/5] individual Tile of R-ACKCH and use 3* (j-1)+mod (i so, 5) individual DFT orthogonal basis carries out orthogonal transform, the result of orthogonal transform is modulated among the R-ACKCH to send then.
The similar the foregoing description two of the receiving course of AN side: the information of each Tile correspondence of the R-ACKCH that received is carried out the FFT conversion, and to obtain length later on be 16 symbol sebolic addressing, then this symbol sebolic addressing is carried out the IDFT conversion, corresponding relation according to AN and AT appointed resource channel designator and DFT sequence number, wherein the result of variations of 5 DFT orthogonal basis correspondences is first group of ACK/NAK sequence, the result of variations of other 5 DFT orthogonal basis correspondences is second group of ACK/NAK sequence, the result of variations of other 5 DFT orthogonal basis correspondences is the 3rd a group of ACK/NAK sequence, and remaining that DFT is the Interference Estimation sequence with those without the corresponding result of variations of the corresponding DFT orthogonal basis of the channel resource of feeding back ACK/NAK information.
AN carries out certain average later Interference Estimation value as system with the Interference Estimation sequence of all Tile, according to this system interference estimated value the ACK/NAK sequence is carried out bit quantization then: n the DFT orthogonal transform result of m Tile (m=1 wherein, 2,3..., n=0,1,2...) Dui Ying ACK/NAK information quantization is the ACK/NAK information of [n/5] individual wave beam correspondence of the individual channel resource of 5* (m-1)+mod (n, 5).
Certainly, the corresponding relation between the corresponding relation of channel resource sequence number and DFT sequence number and these channel resource sequence numbers and Tile sequence number can use the various additive methods that propose among the embodiment one.
In fact, use to different AT channel child node first half resource and the resource allocation of channel child node latter half, also be two kinds of resource distribution modes, that is to say, the resource distribution mode that it is the resource allocation granularity that network side can adopt with half channel child node.
In this case, can be divided into one group to the ACK/NAK information of channel child node first half resource correspondence, the orthogonal basis that these ACK/NAK information are used is divided into one group; The ACK/NAK information of channel child node latter half resource correspondence is divided into another group, and the orthogonal basis that these ACK/NAK information are used is divided into another group.Like this, each AT is when feeding back ACK/NAK information, can adopt with the essentially identical flow process of Figure 10 and handle, difference just in step 102 is: judge that this ACK/NAK information is corresponding with the first half resource of channel child node, still corresponding with the ACK/NAK information of the latter half resource of channel child node, according to the grouping of orthogonal basis, distinguish execution in step 103/104 or execution in step 107/108 then.Specific descriptions and Figure 10 of other steps are identical, repeat no more here.
At last, again the device of feeding back ACK provided by the invention/NAK information and the device of reception ACK/NAK information are elaborated respectively.
Referring to Figure 13, Figure 13 is the feeding back ACK/NAK massaging device schematic diagram of the present invention's the 3rd preferred embodiment.This device comprises ACK/NAK information generating unit 131, orthogonal basis selected cell 132, orthogonal transform unit 133, comprises the modulating unit 134 of first modulation module and second modulation module.
Wherein ACK/NAK information generating unit 131 is used to generate ACK/NAK information, and sends to orthogonal basis selected cell 132.
Orthogonal basis selected cell 132, the ACK/NAK information sets information and the orthogonal basis group information of dividing have been stored according to resource distribution mode, it is used for the ACK/NAK information sets according to the ACK/NAK information place that receives, determine the orthogonal basis group of employing, and from this orthogonal basis group, select an orthogonal basis, orthogonal basis and the described ACK/NAK information of selecting is sent to orthogonal transform unit 133.
Orthogonal transform unit 133 utilizes the orthogonal basis that receives that the ACK/NAK information that receives is carried out orthogonal transform, the result of orthogonal transform is sent to first modulation module 135 in the modulating unit 134, and complete zero information that is used to carry out Interference Estimation carried out orthogonal transform, will send to second modulation module 136 to the result that complete zero information that is used to carry out Interference Estimation is carried out orthogonal transform.
The result that first modulation module 135 in the modulating unit 134 in the present embodiment carries out orthogonal transform with ACK/NAK information is modulated on the reverse ack channel and sends, and the result that second modulation module 136 will complete zero information carries out orthogonal transform is modulated on the reverse ack channel and sends.
In the present embodiment, orthogonal transform unit 133 can be discrete fourier transform unit, 16 rank or other orthogonal transform unit, and modulating unit 134 can be the fast fourier transform modulating unit.
In actual applications, during the device of feeding back ACK/NAK information shown in Figure 13 can be arranged on and access terminal.
Referring to Figure 14, Figure 14 is the device schematic diagram of the reception ACK/NAK information of the present invention's the 4th preferred embodiment.This device comprises: separate mediation merge cells 140, inverse orthogonal transformation unit 143, sequence selection unit 144, obtain system interference estimated value unit 145 and quantification treatment unit 146.
Wherein, separate mediation merge cells 140 and comprised demodulation module 141 and merged module 142, the reverse ack channel signal that is used for receiving carries out merging after the demodulation, and the result that will merge sends to inverse orthogonal transformation unit 143.
The result that inverse orthogonal transformation unit 143 is used to be combined carries out and sends the corresponding inverse orthogonal transformation of orthogonal transform that ACK/NAK information adopts, and the inverse orthogonal transformation result is sent to sequence selection unit 144.
The ACK/NAK information sets information and the orthogonal basis group information of dividing according to resource distribution mode has been stored in sequence selection unit 144, it is used for the information of each orthogonal basis group correspondence as a result of inverse orthogonal transformation is defined as the ACK/NAK information sequence of respective resources method of salary distribution correspondence, and remaining information is defined as interference sequence among the result with inverse orthogonal transformation, send to and obtain system interference estimated value unit 145, the ACK/NAK information sequence is sent to quantification treatment unit 146.
Obtain system interference value cell 145 and be used for calculating the system interference estimated value, and this system interference estimated value is sent to quantification treatment unit 146 according to interference sequence.
Quantification treatment unit 146 is used for according to the system interference estimated value ACK/NAK information sequence being carried out bit quantization, obtains the ACK/NAK information bit.
Inverse orthogonal transformation unit 143 in the present embodiment can be discrete Fourier inverse transformation unit, 16 rank or other inverse orthogonal transformation unit; Demodulation module 141 can be the inverse fast fourier transform demodulation module.
In actual applications, the device of reception ACK/NAK information shown in Figure 14 can be arranged on network side.
By the above embodiments as seen, the method and apparatus of this feedback of the present invention and reception ACK/NAK information, under the situation that does not increase overhead, improved the service efficiency of R-ACKCH channel resource, simultaneously still can make full use of surplus resources, effectively carry out system interference and estimate, guarantee the R-ACKCH quality of channel.
This raising system interference of the present invention is estimated the method for accuracy, make AN can allow as far as possible can all watts resource that partly or entirely is evenly distributed on R-ACKCH channel resource bandwidth as the R-ACKCH channel resource of Interference Estimation on, thereby obtain maximum diversity gain, improve the estimation order of accuarcy of system interference value with this.

Claims (29)

1. the method for feeding back ACK/NAK information is used for need feeding back when multiple resource distribution mode mixes the multi-carrier communications systems of a plurality of ACK/NAK information, it is characterized in that this method comprises:
A, the ACK/NAK information that will need to feed back are divided into two or more ACK/NAK information sets according to resource distribution mode;
B, according to the ACK/NAK packets of information, the orthogonal basis of the orthogonal transform that reverse ack channel is adopted is divided into two or more orthogonal basis groups;
C, access terminal when wanting feeding back ACK/NAK information,, determine the orthogonal basis group that adopts, and from this orthogonal basis group, select an orthogonal basis earlier according to the ACK/NAK information sets at this ACK/NAK information place; Utilize this orthogonal basis to carry out orthogonal transform again, the result of orthogonal transform is modulated on the reverse ack channel sends.
2. the method for claim 1 is characterized in that,
The described ACK/NAK information that will need to feed back of steps A according to the method that resource distribution mode is divided into two or more ACK/NAK information sets is: will be divided into an ACK/NAK information sets with a kind of ACK/NAK information of resource distribution mode correspondence;
The method that the orthogonal basis of the described orthogonal transform that reverse ack channel is adopted of step B is divided into two or more orthogonal basis groups is: the orthogonal basis that same ACK/NAK information sets is adopted is divided into an orthogonal basis group.
3. the method for claim 1 is characterized in that, described step B further comprises:
A channel resource in the resource distribution mode that each orthogonal basis in each orthogonal basis group is corresponding with it is corresponding;
Among the described step C,, from the orthogonal basis group, select an orthogonal basis according to the corresponding relation of each orthogonal basis and channel resource.
4. the method for claim 1 is characterized in that: under the different resource method of salary distribution oppositely in the ack channel group technology of the orthogonal basis of orthogonal transform arrange in advance and/or in system broadcast message, be broadcast to and access terminal by network side.
5. the method for claim 1 is characterized in that, the described orthogonal basis that utilizes of step C carries out orthogonal transform, the result of orthogonal transform is modulated to the method that sends on the reverse ack channel be:
Earlier determine to send watt resource of ACK/NAK information, on this watt resource, use selected orthogonal basis to carry out orthogonal transform, the result of orthogonal transform is modulated on the reverse ack channel sends.
6. method as claimed in claim 5, it is characterized in that: the definite method that sends watt resource information of reverse ACK/NAK information is: according to channel resource under the different resource method of salary distribution of arranging in advance and the corresponding relation of watt resource information of reverse ack channel use, current resource distribution mode and running time-frequency resource positional information, determine watt resource sequence number of transmission ACK/NAK information.
7. method as claimed in claim 6 is characterized in that, this method further comprises: network side notice the access terminal position or the logic sequence number of the resource of distributing to this resource distribution mode that accesses terminal and distribution.
8. the method for claim 1 is characterized in that:
Described multiple resource distribution mode is: distributed resource channel DRCH and centralized resources channel BRCH; Network side adopts distributed resource channel DRCH punching piece channel resource BRCH, and/or the resource distribution mode of BRCH punching DRCH; Or
Described multiple resource distribution mode is: channel child node first half resource and channel child node latter half resource; The resource distribution mode that it is the resource allocation granularity that network side adopts with half child node.
9. the method for claim 1 is characterized in that, described multi-carrier communications systems adopts beam forming technique, and the data of forward channel send to a plurality of accessing terminal by a plurality of wave beams, and then multiple resource distribution mode is: a plurality of different wave beams.
10. method that receives ACK/NAK information is used for need feeding back when multiple resource distribution mode mixes the multi-carrier communications systems of a plurality of ACK/NAK information, it is characterized in that this method comprises:
A, network side carry out conversion and merging to the signal that receives from reverse ack channel, and the result who is combined carries out and sends the pairing inverse transformation of orthogonal transform that ACK/NAK information adopts; And the result of inverse transformation is divided into several ACK/NAK information sequences corresponding with resource distribution mode according to the grouping of orthogonal basis;
Remaining information is defined as the Interference Estimation sequence among B, the result of network side with the inverse transformation of orthogonal transform; And the Interference Estimation value of computing system;
C, network side carry out bit quantization according to the Interference Estimation value of system to the ACK/NAK information sequence, obtain the ACK/NAK information bit.
11. method as claimed in claim 10 is characterised in that, the method that the described result with inverse transformation of steps A is divided into several ACK/NAK information sequences is:
To the grouping of the orthogonal basis of orthogonal transform in the reverse ack channel, the information of each orthogonal basis group correspondence among the result of the inverse transformation of orthogonal transform is defined as the ACK/NAK information sequence of respective resources method of salary distribution correspondence according in advance.
12. method as claimed in claim 10 is characterized in that:
If exist in the system some not distribute to any channel resource that accesses terminal and use, then the remaining information among the result of the inverse transformation of orthogonal transform is: the information of the orthogonal basis correspondence that these channel resources use in the result of the inverse transformation of orthogonal transform;
Or, distribute a plurality of channel resources if access terminal to one simultaneously, the agreement agreement adopts the corresponding ACK/NAK information of one of them channel resource feedback, the channel resource of other distribution does not have corresponding ACK/NAK informational needs feedback, and then the remaining information among the result of the inverse transformation of orthogonal transform is: these do not have the information of the orthogonal basis correspondence that channel resources of corresponding A CK/NAK informational needs feedback use in the result of the inverse transformation of orthogonal transform;
Or the remaining information among the result of the inverse transformation of orthogonal transform is the combination of above-mentioned two kinds of situations.
13. method as claimed in claim 10 is characterized in that: the method for the Interference Estimation value of the described computing system of step B is: this interference sequence is averaged, with the Interference Estimation value of mean value as system.
14. method as claimed in claim 10 is characterized in that:
Described multiple resource distribution mode is: distributed resource channel DRCH and centralized resources channel BRCH; Network side adopts distributed resource channel DRCH punching piece channel resource BRCH, and/or the resource distribution mode of BRCH punching DRCH; Or
Described multiple resource distribution mode is: channel child node first half resource and channel child node latter half resource; The resource distribution mode that it is the resource allocation granularity that network side adopts with half child node.
15. method as claimed in claim 10 is characterized in that, described multi-carrier communications systems adopts beam forming technique, and the data of forward channel send to a plurality of accessing terminal by a plurality of wave beams, and then multiple resource distribution mode is: a plurality of different wave beams.
16. one kind is improved the method that system interference is estimated accuracy, it is characterized in that: portable terminal and network side are determined the corresponding relation of watt resource information that channel resource and reverse ack channel use, and perhaps determine the method for salary distribution of the son watt resource of watt resource in the reverse ack channel;
Network side the time allows partly or entirely being evenly distributed in the reverse ack channel resource bandwidth as the reverse ack channel resource of Interference Estimation carrying out the channel resource scheduling;
Network side utilizes these to be used as the reverse ack channel resource of Interference Estimation, carries out Interference Estimation.
17. as described in claim 16, it is characterized in that described channel resource logic sequence number is determined in the following manner with the corresponding relation of watt resource sequence number that reverse ack channel uses:
1) resource logic numeric order corresponds to all watts resource, and each watt resource is corresponding to a plurality of continuous resource logic sequence numbers; Each reverse ACK is according to the resource logic sequence number use part watt resource wherein of correspondence; Or
2) resource logic sequence number rems with the number altogether of watt resource, the channel resource that comes to the same thing corresponds to identical watt resource, each watt resource is corresponding to a plurality of discontinuous resource logic sequence numbers, and each reverse ACK at channel resource uses the part watt resource in the described watt of resource to send according to the resource logic sequence number of correspondence; Or
3) resource logic sequence number corresponds on wherein one or more watts resource according to pseudorandom mode, and each reverse ACK uses part watt resource wherein to send according to the resource logic sequence number of correspondence;
4) or above-mentioned 1) or 2) or 3) plant any mixed allocation relation of the relations of distribution.
18. as claim 16 or 17 described methods, it is characterized in that: described channel resource logic sequence number is arranged in advance with the corresponding relation of watt resource sequence number that reverse ack channel uses, and/or is broadcast in system broadcast message by network side and accesses terminal.
19. method as claimed in claim 18 is characterized in that: described corresponding relation comprises: watt resource sequence number equals the value that resource logic sequence number rounds then divided by orthogonal basis number in the corresponding orthogonal basis group; And/or the number altogether that watt resource sequence number equals resource logic sequence number die shoe resource is got surplus value then; And/or watt resource sequence number is corresponding with resource logic sequence number in pseudorandom mode.
20., it is characterized in that: the different resource method of salary distribution in the system is adopted identical or different corresponding relation as claim 17 or 18 or 19 described methods.
21. method as claimed in claim 16, it is characterized in that: carry out channel resource at network side and divide timing, demand according to Interference Estimation, by the corresponding relation of algorithm according to channel resource and each reverse ack channel watt resource, scheduler allows in scheduling as partly or entirely being evenly distributed on the whole watts of included resources of reverse ack channel of the reverse ack channel resource of Interference Estimation, obtains maximum diversity gain.
22. method as claimed in claim 16, it is characterized in that: as the reverse ack channel resource of Interference Estimation, comprising: system's agreement is used for carrying out the reverse ack channel resource of Interference Estimation specially and those do not need the pairing reverse ack channel resource of channel resource of feeding back ACK/NAK information;
Network side averages these information as the reverse ack channel resource correspondence of Interference Estimation, with the Interference Estimation value of mean value as system.
23. method as claimed in claim 16 is characterized in that, oppositely the method for salary distribution of the son watt resource of watt resource includes but not limited in the ack channel:
(1) adopt the distributed resource allocation mode to distribute the R-ACKCH channel;
(2) each the son watt resource with each watt resource in the R-ACKCH channel all is distributed on the different frequency domain bands, whole or most of son watt shared frequency resource non-overlapping copies;
(3) the son watt resource of part watt resource adopts mode (1), and the son watt resource of part watt resource adopts the mixed ways of distribution of mode (2).
24. the device of feeding back ACK/NAK information is characterized in that: comprise ACK/NAK information generating unit, orthogonal basis selected cell, orthogonal transform unit and modulating unit;
Described ACK/NAK information generating unit is used to generate ACK/NAK information, and sends to the orthogonal basis selected cell;
Described orthogonal basis selected cell has been stored the ACK/NAK information sets information and the orthogonal basis group information of dividing according to resource distribution mode, it is used for the ACK/NAK information sets according to the ACK/NAK information place that receives, determine the orthogonal basis group of employing, and from this orthogonal basis group, select an orthogonal basis, orthogonal basis and the described ACK/NAK information of selecting is sent to orthogonal transform unit;
The orthogonal basis that described orthogonal transform unit utilization receives carries out orthogonal transform to the ACK/NAK information that receives, and the result of orthogonal transform is sent to modulating unit;
Described modulating unit is modulated to the result of orthogonal transform on the reverse ack channel and sends.
25. device as claimed in claim 24 is characterized in that: described orthogonal transform unit is the discrete fourier transform unit; Described modulating unit is the fast fourier transform modulating unit.
26. device as claimed in claim 24 is characterized in that: during this device is arranged on and accesses terminal.
27. a device that receives ACK/NAK information is characterized in that: comprise separate be in harmonious proportion merge cells, orthogonal transform inverse transformation block, sequence selection unit, obtain system interference estimated value unit and quantification treatment unit;
Described separating is in harmonious proportion merge cells and is used to receive reverse ack channel signal and separates to be in harmonious proportion and merge, and the result that will merge sends to the inverse transformation block of orthogonal transform;
The result that the inverse transformation block of described orthogonal transform is used to be combined carries out and sends the corresponding inverse transformation of orthogonal transform that ACK/NAK information adopts, and the inverse transformation result of orthogonal transform is sent to the sequence selection unit;
The ACK/NAK information sets information and the orthogonal basis group information of dividing according to resource distribution mode has been stored in described sequence selection unit, and it is used for the information of each orthogonal basis group correspondence as a result of the inverse transformation of orthogonal transform is defined as the ACK/NAK information sequence of respective resources method of salary distribution correspondence.
Described sequence selection unit further is defined as interference sequence with remaining information among the result of the inverse transformation of orthogonal transform, sends to and obtains system interference estimated value unit, and the ACK/NAK information sequence is sent to the quantification treatment unit;
The described system interference value cell that obtains is used for calculating the system interference estimated value according to interference sequence, and this system interference estimated value is sent to the quantification treatment unit;
Described quantification treatment unit is used for according to the system interference estimated value ACK/NAK information sequence being carried out bit quantization, obtains the ACK/NAK information bit.
28. device as claimed in claim 27 is characterized in that: the inverse transformation block of described orthogonal transform is discrete Fourier inverse transformation unit; The described mediation merge cells of separating comprises the inverse fast fourier transform demodulation module.
29. device as claimed in claim 27 is characterized in that: this device is arranged on network side.
CNA2006101287767A 2006-08-15 2006-09-09 Method and device for feeding back and receiving ACK/NAK information Pending CN101127584A (en)

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