CN103152831B - The apparatus and method of Resources allocation in single carrier-frequency division multiple access system - Google Patents
The apparatus and method of Resources allocation in single carrier-frequency division multiple access system Download PDFInfo
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- 238000013468 resource allocation Methods 0.000 claims description 16
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/7143—Arrangements for generation of hop patterns
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/715—Interference-related aspects
- H04B2001/7154—Interference-related aspects with means for preventing interference
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Abstract
The invention provides a kind of for the apparatus and method in single-carrier frequency division multiple access SC-FDMA communication system Resources allocation, wherein, at each predetermined bound-time, Node B is carried out intersubband saltus step to the Resource Unit for user equipment (UE) on frequency axis, has wherein defined at least two subbands along frequency axis; At each predetermined bound-time, determine in the subband of the Resource Unit of saltus step having it is to open or turn-off mirror image with community for basis; And by according to described determine optionally the Resource Unit of mirror image institute saltus step select Resource Unit, and by selected resource unit allocation to UE.
Description
The application be that January 9, application number in 2008 are 200880001925.0 the applying date, denomination of invention is for " at single yearThe apparatus and method of Resources allocation in ripple fdma system " the divisional application of application for a patent for invention
Technical field
The present invention relates to one it is believed that for working as packet count at single-carrier frequency division multiple access (SC-FDMA) wireless communication systemRoad and control channel distribute efficiently the method and apparatus of control channel transfer resource in the time that the same transmission period is transmitted.
Background technology
Fig. 1 is the block diagram of the emitter in local FDMA (LocalizedFDMA, LFDMA), and wherein, local FDMA is onePlant SC-FDMA system. Although in the situation shown in Fig. 1 this emitter be configured to use DFT (DFT) andContrary FFT (IFFT), but any other configuration also can be used for this emitter.
With reference to Fig. 1, the use of DFT and IFFT contributes to change with low hardware complexity the parameter of LFDMA system. Just orthogonalDifference between frequency division multiplexing (OFDM) and SC-FDMA aspect transmitter configuration, LFDMA emitter also comprises and being positioned atThe DFT precoder 101 of IFFT processor 102 front ends, its in OFDM emitter for multi-carrier transmission. In Fig. 1, transmission(TX) offer DFT precoder 101 modulated symbol 103 quilt one-tenth pieces. The output of DFT is comprising the wave band of continuous subcarrier(band) be mapped to the input of IFFT. The effect of mapper 104 is that transmission modulated symbol is mapped to actual frequency band(frequencyband)。
Fig. 2 illustrates the sample data transmission that resource that in traditional SC-FDMA system, subscriber equipment is assigned with them is carried out.
With reference to Fig. 2, a Resource Unit (RU) 201 by the one or more subcarriers in frequency and temporal one orMultiple SC-FDMA code elements define. For transfer of data, two RU that indicate oblique line are assigned to UE1, and indicate a little threeRU is assigned to UE2.
The RU that UE1 and UE2 are used for sending data be in time fix and in predetermined frequency band, be continuous. ThisResource Allocation Formula or data transmission scheme optionally will provide the frequency resource allocation of good channel conditions to each UE, fromAnd with limited system resource maximum system performance. For example, compared with other frequency band, the piece that indicates oblique line provides phase to UE1To good characteristics of radio channels, and the piece indicating a little provides characteristics of radio channels relatively preferably to UE2. Optionally distributeThe resource with better channel response is called as frequency selectivity resource and distributes or frequency selective scheduling. With above-mentioned from UE toThe uplink data transmission of Node B is the same, and the down link data that frequency selective scheduling is applicable to from Node B to UE passesDefeated. On downlink, the RU that indicates oblique line and point represents that respectively Node B is used for sending data to the resource of UE1 and UE2.
But frequency selective scheduling is not always effective. For mobile rapid the quick of channel status that also experience thusThe UE changing, frequency selective scheduling is not easy. More particularly, although node B scheduling device divided to UE in preset timeJoin the frequency band in relative good channel conditions, but receive from the resource allocation information of Node B and will be with institute as UEWhen the resource of distributing sends data, UE is but arranged in the channel circumstance having been changed significantly. Therefore, selected frequency bandUnpromising UE guarantees relatively good channel status.
Even a small amount of frequency resource of the needs as the voice based on Internet Protocol (VOIP) so constantly forIn the service of transfer of data, if UE reports that its channel status is for frequency selective scheduling, signaling consumption may be hugeLarge. In the case, use frequency hopping (frequencyhopping) more effective than the selective scheduling of frequency of utilization.
Fig. 3 illustrates the example frequency hopping in traditional F DMA system.
With reference to Fig. 3, distribute to the frequency resource temporal evolution of UE for transfer of data. Frequency hopping has such effect:Make channel quality and interference randomization during transfer of data. Because data are transmitted by time dependent frequency resource,So data have the different characteristics of channel and data are disturbed by the different UEs in neighbor cell at each time point, thus realShow diversity.
But in SC-FDMA system as shown in Figure 3, when RU is during according to pattern saltus step independently, frequency hopping is infeasible. For example, if RU301 and 302 is assigned to different UE, not serious. But, if RU301 and 302 the two all by pointThe single UE of dispensing, they jump to position RU303 and 304 by carrying out frequency hopping in next transfer point. Due to RU303 andThe 304th, discontinuous, so UE can not transmit data with these two RU.
In this case, in order to realize frequency diversity in SC-FDMA system, propose to replace with mirror image (mirroring)For frequency hopping.
Fig. 4 illustrates mirror image.
Traditionally, RU moves symmetrically with respect to the center frequency-band of the total frequency band that can be used for transfer of data. For example,, in communityIn A, in next transmission time, RU401 is mirrored onto RU403 and RU402 is mirrored onto RU404. In an identical manner, littleIn district B, in next transmission time, RU405 is mirrored onto RU406. It can saltus step be continuous that mirror image makes continuous RU, therebyDuring frequency hopping, meet single-carrier property.
The shortcoming with the frequency hopping of frequency diversity is that saltus step pattern (hoppingpattern) fixes, becauseNot in the situation with respect to centre frequency mirror image, never mobile RU. Although this means that having realized to a certain extent frequency dividesCollection is still difficult to realize interference randomization. In the time jumping to the RU of relative position and return to its original position by mirror image, only have onePlanting RU saltus step pattern can use. Therefore,, even in the time there is multiple community, each community can not have different patterns.
With reference to Fig. 4, if the RU402 indicating a little in the scheduled time is assigned to the UE in the A of community and indicates monocline lineRU405 be assigned to the UE in the B of community, the UE of the UE interfered cell B in the A of community, because only have one in mirror image schemePlanting saltus step pattern can use. If the UE of community B is during near community A, the UE in the A of Ta Jiangdui community causes huge interference. As a result,Use indicates a UE of RU community A and is subjected to quality of reception deterioration.
Summary of the invention
One aspect of the present invention is at least to deal with problems and/or is unfavorable and advantage described below is at least provided.Correspondingly, one aspect of the present invention provides and is to provide a kind of for when employing mirror image Resources allocation when realizing frequency diversityWith the method and apparatus of the interference between randomization neighbor cell.
It is a kind of for according to the different mirror image on/off pattern of each community that another aspect of the present invention is to provideDetermine that at each Hopping time be the method for opening or turn-offing mirror image, and use the sending/receiving device of the method.
It is a kind of in the time can supporting frequency hopping with increase frequency diversity effect that another aspect of the present invention is to provide, according to oftenThe different pattern of individual community determines that at each Hopping time be the method for opening or turn-offing frequency hopping and mirror image, and use shouldThe sending/receiving device of method.
According to another aspect of the present invention, provide a kind of for receive the method for data in communication system, comprise stepRapid: send resource allocation information at Node B place; According to whether enabling saltus step and mirror image is determined in described resource allocation informationFor receive the resource of data from subscriber equipment (UE) at Node B place; Receive number at Node B place by determined resourceAccording to; And the data of decoding and receiving at Node B place.
According to another aspect of the present invention, provide a kind of for send the method for data in communication system, comprise stepRapid: to locate receiving resource allocation information at subscriber equipment (UE); In described resource allocation information, whether enable saltus step by UE basisBe identified for the resource of transfer of data with mirror image; And utilize determined resource to send data from UE to Node B.
According to another aspect of the present invention, provide a kind of for receiving data in communication system from subscriber equipment (UE)The device of Node B, comprising: scheduler, for sending resource allocation information, and according in described resource allocation information whetherEnabling saltus step and mirror image is identified for from the resource of UE reception data; Remove mapper, for making a return journey by determined resourceThe data that mapping receives from UE; And decoder, for the data of decoding after mapping.
According to another aspect of the present invention, provide a kind of for send the user of data to Node B in communication systemThe device of equipment (UE), comprising: Data Transmission Control Unit, and for receiving resource allocation information, and according to distributing in described resourceIn information, whether enable saltus step and mirror image and be identified for the resource of transfer of data; And mapper, for data-mapping is arrivedDetermined resource also sends to Node B by the data after mapping.
Brief description of the drawings
From the detailed description below in conjunction with accompanying drawing, the above and other object of particular example embodiment of the present invention, spyThe advantage of seeking peace will be clearer, in the accompanying drawings:
Fig. 1 is the block diagram of the emitter in the traditional LFDMA system as a kind of SC-FDMA system;
Fig. 2 is shown in the sample data transmission that resource that in traditional SC-FDMA system, UE is assigned with them is carried out;
Fig. 3 is shown in the example frequency hopping in traditional F DMA system;
Fig. 4 illustrates mirror image;
Fig. 5 A and 5B illustrate according to the method for example embodiment of the present invention;
Fig. 6 is the flow chart of selecting the operation of RU in UE or Node B according to example embodiment of the present invention;
Fig. 7 is according to the block diagram of the UE of example embodiment of the present invention;
Fig. 8 is according to the block diagram of the Node B of example embodiment of the present invention;
Fig. 9 illustrates according to the channel architecture of another example embodiment of the present invention;
Figure 10 A illustrates according to the method for the second example embodiment of the present invention to Figure 10 D;
Figure 11 is the flow chart of selecting the operation of RU in UE or Node B according to the second example embodiment of the present invention;
Figure 12 illustrates according to the channel architecture of the 3rd example embodiment of the present invention;
Figure 13 diagram the 3rd example embodiment according to the present invention for not considering mixed automatic retransfer request (HARQ)Carry out the method for mirror image;
Figure 14 diagram the 3rd example embodiment according to the present invention for carry out the method for mirror image for each HARQ process;
Figure 15 diagram is according to the method for each HARQ process execution mirror image of the 4th example embodiment of the present invention.
Detailed description of the invention
Furnish an explanation the content such as concrete structure and element that defines in book to help complete understanding the present inventionExample embodiment. Correspondingly, those of ordinary skill in the art will appreciate that, do not departing from the spirit and scope of the present inventionIn situation, can carry out variations and modifications to the embodiments described herein. In addition for clarity and conciseness, omit,To the description of known function and structure.
Example embodiment of the present invention provides a kind of method, is scheduled to each for working as according to general frequency hopping or mirror image schemeTime sends data with different RU increases the degree of randomization of the interference of minizone when realizing frequency diversity(randomization), meet the single-carrier property (property) in uplink SC-FDMA system simultaneously.
In order to understand better the present invention, carry out as given a definition for data channel:
Frequency scheduling (FS) band: the set of the RU distributing by frequency selective scheduling. They are continuous or divideFall apart.
Frequency hopping (FH) band: be transmitted the set of the RU that realizes frequency diversity. These RU adjust by frequency selectivityDegree distributes. They are continuous or disperse. FH band can comprise one or more sub-FH bands.
Mirror image: RU jumps from left to right or from right to left symmetrically with respect to sub-FHDai Zhong center subcarrier or center RUBecome.
Bound-time: the RU saltus step distributing or the time being mirrored. Depend on how saltus step or mirror image apply, RUThere is the following period.
1. in the time supporting in subframe between saltus step and subframe saltus step, the described period is time slot.
2. in the time only supporting between subframe saltus step, the described period is a subframe.
Embodiment 1
Example embodiment of the present invention provides a kind of different mirror image on/off pattern according to each community to openMirror image or the method for turn-offing mirror image. Use as far as possible different mirror image on/off patterns and reduce little for different districtsThe probability that in district, mirror image is opened simultaneously makes the maximum effect of the interference randomization of minizone.
Fig. 5 A and Fig. 5 B illustrate according to the method for example embodiment of the present invention. Fig. 5 A diagram is not considered mixed automatic retransferThe timeslot-based mirror image of request (HARQ), and 5B diagram is for the independently mirror image (independent of each HARQ processmirroring)。
With reference to Fig. 5 A, there is 501He community, community 502 (community A and community B). Owing to having supposed saltus step in subframe, soThe saltus step period is time slot. On the basis of time slot, the each jumping in the pattern 512 in the pattern 503He community B in the A of communityThe change time is carried out mirror image, and wherein pattern 503 is for opening, open, open, turn-off, open, turn-off, turn-off, turn-offing ..., pattern 512For opening, turn-off, open, open, turn-off, turn-off, open, opening ...
In the A of community, at bound-time k, RU504 is assigned to UEA. Due at next bound-time (k+1) for UEA mirror image is opened, so UEA uses the RU505 in time slot (k+1). Turn-off at bound-time (k+3) mirror image, thereforeAt time slot (k+3), UEA sends data with the RU506 identical with the RU using in last time slot (k+2). Similarly, due toTurn-off at bound-time (k+6) mirror image, therefore at time slot (k+6), UEA with last time slot (k+5) in use RU phaseSame RU507 sends data
In an identical manner, in the B of community, at time slot k, RU508 is assigned to UEB. Due at next bound-time (k+ 1) mirror image turn-offs, so use RU509 at time slot (k+1) UEB. At bound-time (k+3), mirror image is opened, because ofThis is at time slot (k+3), and UEB uses RU510. Similarly, owing to opening at bound-time (k+6) mirror image, so at time slot(k+6), UEB uses RU511.
In each community, mirror image is opened or is turn-offed at each bound-time according to different pattern. Therefore, although givenUE in time slot in different districts may use identical RU, but owing to having used different mirror image on/off patternsMake different districts in next time slot use the probability of identical RU to reduce. For example, at time slot k, RU504 and RU508 respectively byDistribute to the UEB in the B of UEAHe community in the A of community. If UEB is near community A, UEB may greatly disturb UEA. But, because UEA opens mirror image at next bound-time (k+1), so UEA sends number with RU505 in time slot (k+1)According to, for mirror image shutoff of UEB, therefore UEB sends data with the RU509 identical with the RU using in last time slot.Therefore,, at time slot (k+1), UEA and UEB use different RU.
In Fig. 5 B, illustrated mirror method is from the similarity of illustrated mirror method in Fig. 5 A: different communities makeWith different mirror image on/off patterns, in Fig. 5 A, illustrated a kind of front method is different from illustrated a kind of rear method in Fig. 5 BPlace be: RU is mirrored with respect to the RU in same HARO process, instead of with respect to the RU quilt in last time slotMirror image. In Fig. 5 B, for the UE of community 513 (community A), at jumping moment k, mirror image is opened. Therefore, UE usesThe RU518 of the RU517 institute mirror image using in the last time slot (k-RRT+1) of same HARQ process, instead of use last time slot(k-1) RU of the RU institute mirror image using in. RTT represents two-way time (RoundTripTime), and it is defined in for quiltThe response that sends data is negative response (NACK) and is situations of affirmative acknowledgement (ACK) for the response of the data that are retransmittedThe time that middle initial transmission spends. Therefore the data that, send with RU518 and RU519 are the numbers that send with RU516 and RU517According to retransmission version or belong to same HARQ process with the data that send with RU516 and RU517. Based on the mirror image of HARQRTTContribute to define a kind of for initial transmission and the mirror image on/off scheme that retransmits the different RU of use. Although there is this advantage,The mirror image on/off patterns different for each HARO process management have but increased complexity. In the case, mirror image unlatching/Turn-off pattern and be confirmed as following situation.
(1) at each bound-time mirror image according to predetermined sequence (sequence) on/off. Need described sequence instructionMirror image is for opening or turn-offing, instead of the position of indicating RU to want saltus step. Therefore, described sequence is made up of two values. General nextSay, binary sequence forms by 1 and 0.
(2) multiple sequences are generated and distribute to community, make at least to apply different patterns for neighbor cell, therebyMinimize the RU conflict between community. For example, one group of orthogonal code such as Walsh (Walsh) code is assigned to that each is littleDistrict and each community are determined mirror image on/off at each bound-time according to code value 0 or 1. Alternatively, each communityCan determine mirror image on/off according to pseudo noise (PN) sequence for each community with specific seed. With front oneMethod is compared, and a kind of rear method has increased the degree of randomization of minizone and therefore minimized the RU in different districts with phaseWith the phenomenon of mode saltus step. In the situation of the method based on PN sequence, example embodiment of the present invention will be retouched belowState.
In order to generate PN sequence, use the seed of community specific (cell-specific) to obtain identical PN sequence, withUE in one community should receive identical timing information. Timing information can be represented as absolute time and current time itBetween difference or frame count common time (commontimeframecount), for example system-frame quantity (SFN).
Fig. 6 is according to the flow chart of the operation of the mirror image on/off in definite UE of example embodiment of the present invention. ForFrom UE receive data, Node B can be carried out identical operation.
With reference to Fig. 6, in the time that Node B is UE scheduling RU, generates PN sequential value and check in step 602 at step 601UEPN sequential value. If PN sequential value is 0, in step 604, UE turn-offs mirror image. If PN sequential value is 1, in step 603,UE opens mirror image. In step 605, UE according in step 603 or step 604 determine mirror image on/off select forThe RU of next transfer of data. In step 606, UE sends data with selected RU.
Mirror image causes the Central Symmetry saltus step of RU with respect to total FH band. Can be based on about front for the new RU of next time slotThe information of the RU using in one time slot and being detected. Mirror image is represented as formula (1):
H(r)=NFH-r……（1）
Wherein, r represents the RU as mirror image basis. Mirror image basis is RU and the figure using in the last time slot in Fig. 5 AThe RU using in last time slot in 5B in same HARQ process. H (r) is illustrated in the RU that in time slot, mirror image basis is mirrored onto.NFHRepresent the total quantity of RU in FH band.
Fig. 7 is according to the block diagram of the UE of example embodiment of the present invention.
With reference to Fig. 7, data symbols maker 703 generates the data symbols that will send. At each Transmission Time Interval (TTI)In the data volume that can transmit determine by node B scheduling. Serial-arriving-parallel (S/P) converter 704 is by the order of data symbolsRow are converted to paralleled code element sequence. Paralleled code element sequence is converted to frequency signal by DFT processor 705, passes for SC-FDMADefeated. DFT size equals the quantity of the data symbols generating from data symbols maker 703. Mapper 706 is based on from transfer of dataThe RU information that controller 702 receives is mapped to frequency signal the frequency resource of distributing to UE. Data Transmission Control Unit 702 based onThe RU information of dispatching and mirror image on/off Information generation RU information. Each community has the different mirror according to PN sequencePicture on/off pattern. Therefore, PN sequence generator 701 is necessary. In preceding method, the RU that use uses PNThe output of sequence generator 701 determines. IFFT processor 707 converts the signal of mapping to time signal. Parallel-to-stringRow (P/S) converter 708 converts time signal to serial signal, for transmission.
Fig. 8 is according to the block diagram of the Node B of example embodiment of the present invention.
With reference to Fig. 8, received signal is converted to parallel signal to S/P converter 807 and fft processor 806 shouldParallel signal is converted to frequency signal. Remove the RU about each UE of mapper 805 based on being determined by uplink scheduler 802Assignment information, goes frequency signal to mapping for different UEs. Uplink scheduler 802 makes based on mirror image on/off patternBe that each UE generates RU information by dispatched RU information and mirror image on/off information. Because each community has differenceMirror image on/off pattern, so need PN sequence generator 801. Based on PN sequence generator 801 in preceding methodOutput decides the RU that will extract from it data. IDFT processor 804 is by target (intended) UE(UE1) go mapping afterSignal is converted to time signal. Time signal is converted to serial signal by P/S converter 808. Data symbol decoder 803 demodulationThe data that receive from UE1.
Embodiment 2
Sub-FH interband saltus step on/off and the combination of mirror image on/off, and by a combination in Selection and ConstituteMake each community there is different patterns to be identified for the position of the RU of transfer of data. That is to say, total system frequency bandResource is divided into FH band and FS is with and advises a kind of channel architecture, and this channel architecture provides sufficient frequency hopping to increase in FH bandBenefit and realize sufficient available band in FS band.
Fig. 9 illustrates according to the channel architecture of the second example embodiment of the present invention.
With reference to Fig. 9, sub-FH is with 901 and 903 either sides that are limited at total frequency band, and sub-FH is with between 901 and 903Center frequency-band is defined as FS and is with 902. Use FS can jump to sub-FH with 902 UE and be with 901 and 903, thereby obtain enoughFrequency Hopping Processing Gain. Because FS is continuous with 902 frequency so that cline frequency distributes maximization, so can increase maximum numberAccording to rate.
To describe now a kind of method, the single-carrier property in its channel architecture of considering to advise, in each FH bandCarry out the saltus step of sub-FH interband and mirror image and realize variable RU distribution to obtain enough frequency diversity gain simultaneously. As thisIn the first bright example embodiment, carry out like that, at each bound-time according to community specific pattern, the saltus step of sub-FH interbandOn/off and mirror image on/off.
Four kinds of combinations of sub-FH interband saltus step on/off and mirror image on/off are available, as shown in table 1.At each bound-time, a kind of in Selection and Constitute combine and use selected combination with different patterns by saltus step or/Be applied to each community with mirror image.
Table 1
| Combination | FH is with saltus step | Mirror image |
| 1 | Open | Open |
| 2 | Turn-off | Turn-off |
| 3 | Turn-off | Open |
| 4 | Open | Turn-off |
Figure 10 A describes the second example embodiment of the present invention to Figure 10 D.
Figure 10 A and the hypothesis of Figure 10 B based on such: in community 1001 and 1007 (community A and community B), support in TTISaltus step. Therefore, the saltus step period is time slot.
With reference to Figure 10 A and Figure 10 B, for community A with 3-1-4-3-2-1-2-3 order and for community B with 3-4-2-1-3-2-1-4 selects according to the sub-FH interband saltus step on/off of table 1 and the combination of mirror image on/off.
Although community A uses RU1002 at bound-time k, it passes through sub-FH at bound-time (k+1) according to combination 1Interband saltus step and mirror image are selected RU1005. At next bound-time (k+2), according to combination 4, community A only carries out sub-FH interbandSaltus step and do not carry out mirror image and therefore select RU1003. Because combination 2 is arranged for bound-time (k+4), therefore community ASelect RU1004 and do not carry out the saltus step of sub-FH interband and mirror image.
Community B selects the same RU1008 for community A at bound-time k. At bound-time (k+1), community B basisCombination 4 is not carried out mirror image and is selected RU1009 by the saltus step of sub-FH interband, and by contrast, community A had both passed through according to combination 1Carry out the saltus step of sub-FH interband and carry out again mirror image selection RU1005. Although another UE in time slot (k+1) small area B may makeWith the RU identical with RU1005. Whether but with the conflicting but provide more from the interference of different UEs in each moment of same UEGood interference randomization gain.
In Figure 10 C and the illustrated situation of Figure 10 D, with respect to the last data transfer for same HARQ processRU instead of the RU using at last bound-time carry out the saltus step of sub-FH interband and mirror image.
With reference to Figure 10 C, at bound-time k by the son of the RU1014 for the last data transfer of same HARQ processFH interband saltus step instead of select RU1013 in the sub-FH interband saltus step of the RU of bound-time (k-1) use. During for saltus stepBetween k combination 4 is set, its meaning is for RU1014, sub-FH interband saltus step unlatching and mirror image turn-off. Therefore, select at bound-time kSelect RU1013. At the bound-time (k+1) that it is arranged to combination 3, be mirrored onto RU1012 through the RU1013 of sub-FH interband saltus step.
To the combination that use predetermined sequence chooser FH interband saltus step on/off and mirror image on/off be described nowMethod.
(1) owing to need to this sequence indicating from four kinds of groups of sub-FH interband saltus step on/off and mirror image on/offClose the combination of middle selection, and the position that does not need this sequence instruction RU to want saltus step, so can use four in the time forming this sequenceValue. Conventionally, two of quaternary sequence or combination binary sequences are used to indicate the object of selected combination. Can be with traditionMethod generate this sequence, therefore the detailed description to the method is not provided here.
(2) multiple sequences are generated and distribute to community, thereby make at least to apply different patterns for neighbor cellMinimize the RU conflict between them. For example, will be such as Walsh (Walsh) code with man-to-man corresponding relation orthogonalCode set be assigned to community, and each community at each bound-time according to sequential value Selection and Constitute. Alternatively, everyIndividual community is according to the PN sequence selection combination having the specific seed in community. As a kind of front method is compared, a kind of rear method increasesAdd the degree of randomization of minizone, and thereby be minimized in different districts RU with same mode saltus step. Based on PN sequenceIn the situation of method, example embodiment of the present invention will be described below.
In order to generate PN sequence, use the specific seed in community to obtain identical PN sequence, the UE meeting in same communityReceive identical timing information. This timing information can be represented as difference between absolute time and current time or publicTime frame counting, for example SFN.
Figure 11 is according to the flow chart of the operation of the UE of the second example embodiment of the present invention. When Node B receives from UEWhen data, aforementioned operation is applicable to Node B.
With reference to Figure 11, when Node B is UE while dispatching specific RU, in step 1101, UE generates PN sequential value and in step1102 determine that PN sequential value is 1,2,3 or 4. If PN sequential value is 1, in step 1103, UE select mirror image open andThe combination that sub-FH interband saltus step is opened. If PN sequential value is 2, in step 1104, UE selects mirror image to turn-off and sub-FH bandBetween saltus step turn-off combination. If PN sequential value is 3, in step 1105, UE select mirror image turn-off and the saltus step of sub-FH interband is openedThe combination of opening. If PN sequential value is 4, in step 1106, UE selects mirror image to open and the combination of sub-FH interband saltus step shutoff.In step 1107, UE selects the RU for transfer of data according to selected combination by mirror image and/or saltus step. In stepIn 1108, UE sends data with selected RU.
Except PN sequence generator 701 and 802 generates a value in 1 to 4 four value and generated value is providedThereby determine outside the position of RU to Data Transmission Control Unit 702 and uplink scheduler 802, the second example according to the present inventionThe transmitter and receiver of embodiment has identical joining with the transmitter and receiver of the first example embodiment according to the present inventionPut.
Embodiment 3
The channel architecture of Figure 12 diagram the 3rd example embodiment according to the present invention.
For wherein existing as shown in figure 12 multiple sub-FH bands and saltus step always to occur in the system between sub-FH band, buildDiscuss a kind of method of determining mirror image on/off for each community according to different pattern. Use different for different districtsMirror image on/off pattern has reduced the probability of carrying out at one time mirror image in different districts, thereby causes minizone dryThe degree of randomization of disturbing maximizes.
Figure 13 and Figure 14 describe according to the method for the 3rd example embodiment of the present invention. Specifically, Figure 13 diagram withThe mirror method that HARQ is irrelevant, and Figure 14 is shown in the method for carrying out mirror image on HARQ process basis.
With reference to Figure 13, owing to supposing that community 1301 and community 1311 (community A and community B) support saltus step in subframe, instituteTaking the saltus step period (hoppingperiod) as time slot. In the A of community according in pattern 1310 Er community B according to pattern 1320Come to carry out mirror image at each bound-time, wherein, pattern 1310 is for opening, open, turn-off, turn-off, open, turn-off, turn-off, closingDisconnected ..., and pattern 1320 is for opening, turn-off, turn-off, open, turn-off, turn-off, open, opening ...
If in the A of community, at jumping moment k, sub-FH is assigned to UE with the RU1302 in #1, because sub-FH interband is jumpedAlways become and be suitable for, so UE jumps to sub-FH band #2 and is mirrored according to mirror image pattern 1310. Therefore, at time slot (k+1), UEUse RU1303. At next bound-time (k+2), UE is by jumping to sub-FH band #1 and turn-offing mirror image and select RU1304.At next bound-time (k+3), owing to jumping to sub-FH, with #2 occurs, mirror image turn-offs, so at time slot (k+3), UE makesUse RU1305.
Compared with the A of community, define a kind of different mirror image on/off pattern for community B. In other words, for oftenIndividual community, at each bound-time, mirror image is on/off by different way. Although community A and community B are at given bound-timeCan select same RU, but the 3rd example embodiment of the present invention reduces in Liao Liangge community in next saltus step selection of timeThe probability of same RU.
For example, therein for identical RU1302 of the scheduled time and 1312 be assigned to respectively UEA in the A of community andIn the situation of UEB in the B of community, if UEB near community A, at bound-time k, UEA may be subject to the greatly dry of UEBDisturb. But, owing to not only carrying out the saltus step of sub-FH interband but also carry out mirror image at next bound-time (k+1) community A, thus UEA timeGap (k+1) sends data with RU1303, and for community B, sub-FH interband saltus step unlatching and mirror image turn-offs, therefore UEB timeGap (k+1) sends data with RU1313. Therefore, UEA and UEB use different RU at time slot (k+1), thereby avoidFrom the continuous interference of same UE.
In Figure 14, in illustrated mirror method and Figure 13, the similarity of the method for illustrated mirror image is: mirror image is deferred to sonThe saltus step of FH interband and different districts are used different mirror image on/off patterns, and the difference of the former with the latter is:With respect to the RU in same HARQ process but not carry out mirror image RU with respect to the RU using in the last transmission time.
Namely, at bound-time (k+RTT), the UE in community 1401 (community A) uses the time slot of same HARQ process(k+1) RU1407 that the RU1406 using in is mirrored, instead of use the RU using in last time slot (k+RTT-1) by mirrorThe RU of picture. Mirror image based on HARQRTT is convenient to define mirror image on/off pattern, wherein uses for initial transmission and re-transmissionDifferent RU, thus maximize interference diversity effect.
Selecting when RU, except the saltus step of sub-FH interband occurs all the time, UE with the first example embodiment of the present inventionIdentical mode is determined mirror image on/off.
In order to realize the 3rd example embodiment of the present invention, for example, provide saltus step pattern formula according to equation (2). UE usesSaltus step pattern formula is learnt the Resource Block that will use in each transmission time with the index of the Resource Block of dispatching. Equation (2) willDisplacement (shifting) based on subband is for intersubband saltus step.
Os=f_s-No·h(t),Os=OsmodN_RB
if0≤Os<Ns
fhop(i)=No·h(i)+Os+{(Ns-1)-2×(Osmod(Ns))}×m(i)
fhop(i)=fhop(i)modN_RB
elseifNs≤Os
fhop(i)=No·h(i)+Os+{(No-1)-2×((Os-Ns)mod(No))}×m(i)
fhop(i)=fhop(i)modN_RB
……(2)
Wherein OsRepresent scheduling to the Resource Block of UE the side-play amount (offset) apart from cyclic shift reference point, f_s representsThe index of Resource Block distributing according to scheduling grant (schedulinggrant), h (t) is illustrated in scheduling time (t) to be dispatchedResource Block be recycled the degree of displacement, fhop(i) be illustrated in bound-time (i) the saltus step index of Resource Block afterwards, N_RB representsCan be used for the total quantity of the Resource Block of transfer of data, and NoAnd NsIt is the Resource Block that can be scheduled for the UE that carries out saltus stepMaximum quantity.
If the total N_RB of Resource Block is not the multiple of number of sub-bands M, the quantity of the Resource Block that special subband hasNsThan the quantity N of other subband Resource Block separatelyoFew. Because equation (2) supposes to only have a subband to have the money of lesser amtSource piece, so NoAnd NsCalculate by equation (3).
In equation (2), h (i) represents cyclic shift degree (cyclicshiftdegree), and it is according to stochastic orderingThe bit value of row select 0,1 ..., in M} one. H (0)=0. M (i) be determine bound-time (i) locate mirror image open/The parameter of turn-offing, it is { in 0,1} one. M (i) selects according to the bit value of random sequence, or by h (i)=x/2 and m (i)=xMod (2) select, wherein x be select according to the bit value of random sequence 0,1 ..., one in M}Individual. If m (i)=0, mirror image turn-offs, if m (i)=1, mirror image is opened.
In order to describe very much equation (2) in detail, first calculate dispatched Resource Block by the first row of equation (2)The side-play amount O of scheduling times。OsApart from cyclic shift reference point how far the Resource Block of instruction cyclic shift.
OsFor following former thereby introducing. In the time that the total quantity N_RB of Resource Block is not the multiple of number of sub-bands M, sonThe stock number difference that band has, the intersubband saltus step that this leads to the failure. Therefore, in the 3rd example embodiment of the present invention, sonBand is formed the quantity N that makes the Resource Block that a subband hasoThan the number of the Resource Block of the each subband in other subbandAmount NsFew, and OsBe used to have to UE instruction the subband of less Resource Block quantity.
For example, if N_RB be 22 and M be 4, subband can be configured such that the first subband has four Resource BlockAnd each subband in other subband has six Resource Block. In this sub band structure, if OsBe less than 4, UE know adjustThe Resource Block of degree is arranged in less subband.
According to first conditional statement of equation (2), the Resource Block dispatched is with respect to Resource Block 0 to Ns-1 according to inclined to one sideThe amount of moving OsBe recycled displacement, then at NsIn individual Resource Block, be mirrored. If m (i)=0, mirror image turn-offs.
If OsBe greater than Ns(this implies that the Resource Block of dispatching is positioned at normal band), according to the second condition language of equation (2)Cyclic shift carried out in sentence, then at NoIn individual Resource Block, carry out mirror image. If m (i)=0, mirror image turn-offs.
According to subband arrangement, multiple subbands can have N separatelysIndividual Resource Block, multiple remaining subbands separately can simultaneouslyTo there is NoIndividual Resource Block. For example, if provide 4 subbands, two subbands have five Resource Block separately, and other two sonsBand has six Resource Block separately. This situation can be by the subband that uses the instruction of side-play amount amendment equation (2) to dispatchConditional statement and easily realize.
Embodiment 4
If mirror image is opened or turn-offed according to random pattern in each community, continuous mirror image on/off increasesAdd UE in different districts carries out transfer of data probability with identical RU. Consider with regard to channel quality when passing through HARQ processIt is first-selected sending and obtaining enough frequency diversities in each transmission time when data, is necessary to allow UE at least such as initiallyIn the situation of the continuous data transmission of transmission and re-transmission and so on, select different RU. In order to accomplish this point, the of the present invention the 4thExample embodiment is advised a kind of method of limited use, the method for generate when needed random mirror image pattern and according to this withMachine mirror image pattern is determined mirror image on/off. In the time both supporting in subframe that saltus step is also supported between subframe in saltus step, for two saltus stepsA scheme in scheme is always opened at each bound-time mirror image, and for another saltus step scheme mirror image with random mirrorLook like on/off pattern and on/off.
Figure 15 diagram the 4th example embodiment according to the present invention right for always opening mirror image for saltus step between subframeIn subframe, the method for mirror image on/off is determined in saltus step according to random mirror image on/off pattern.
As in the present invention's the second example embodiment, sub-FH band is positioned at the both sides of band system band and FS band is inserted in sub-FHCenter frequency-band place between band. In order to obtain frequency diversity gain, as in the present invention's the 3rd example embodiment, eachBound-time RU is in the saltus step of sub-FH interband.
With reference to Figure 15, bound-time in each subframe is opened, turn-offs, is closed according to pattern in community 1500 (community A)Disconnected ... 1520(community, Er community B) according to pattern turn-off, turn-off, open ... there is mirror image.
In the A of Dang community in the time that bound-time (k-RTT) RU is assigned to UE, at next jumping moment (k-RTT+1), UESelect RU1503 by carrying out mirror image according to this mirror image on/off pattern. In next transmission as same HARQ processThe bound-time k of time, mirror image is always opened. In order to select and the RU sending in the last transmission time of same HARQ processIn the RU of diverse location, the RU1502 using in first time slot (k-RTT) in last HARQ transmission time by mirror image comesSelect RU1504. Owing to turn-offing at next bound-time (k+1) mirror image according to mirror image on/off pattern, so UE choosingSelect RU1505. At the bound-time (k+RTT) in next transmission time as same HARQ process, mirror image is always opened. ForSelect the RU in diverse location with the RU sending in the last HARQ transmission time, RU1504 is mirrored onto RU1506. Due toTurn-off at next bound-time (k+RTT+1) mirror image according to mirror image on/off pattern, so UE selects RU1507.
In an identical manner, in the B of community, RU is opened/closes according to random mirror image by bound-time in each subframeDisconnected pattern carrys out on/off mirror image and jumps to another sub-FH band. That is to say, if used in time slot (k-RTT)RU1508, at next jumping moment (k-RTT+1), selects by turn-offing mirror image according to mirror image on/off patternRU1509. Because at next HARQ transmission time mirror image being used with respect to the last transmission time in same HARQ processRU1508 carries out, so select RU1510 at bound-time k. At bound-time (k+1), mirror image is opened/is closed according to mirror imageDisconnected pattern and turn-offing, and thereby select RU1511. Due in next HARQ transmission time with respect in same HARQ transmitting procedureThe RU1510 that uses of last transmission time carry out mirror image, so select RU1512 at bound-time (k+RTT). At bound-time(k+RTT+1), open according to mirror image on/off pattern mirror image, therefore select RU1513.
As clearly visible from the above description, the invention has the advantages that: by each community according to different mirrorsPicture on/off pattern is opened or turn-offs mirror image at each bound-time, thereby the interference of randomize inter-cell increases frequency and dividesCollection effect.
Although illustrate and described the present invention, those skilled in the art with reference to particular example embodiment of the present inventionWill appreciate that, in the case of not departing from the spirit and scope of the present invention that claims and its equivalent limit, canThe present invention is carried out to the various changes in various forms and details.
Claims (24)
1. for receive a method for data in single-carrier frequency division multiple access communication system, comprise step:
Send resource allocation information at Node B place;
Be identified at Node B place from user equipment (UE) based on whether enabling saltus step and mirror image and described resource allocation informationReceive the resource of data;
Receive data at Node B place by determined resource; And
The data of decoding and receiving at Node B place.
2. method according to claim 1, wherein, described saltus step is intersubband saltus step.
3. method according to claim 1, wherein, described mirror image is mirror image in subband.
4. method according to claim 1, wherein, by random sequence function for determining making of mirror image in each communityEnergy.
5. method according to claim 1 wherein, is determined enabling of saltus step and mirror image in the time of data receiver.
6. method according to claim 1, wherein, the period of carrying out saltus step and mirror image is at least one in time slot and subframeIndividual.
7. for send a method for data in single-carrier frequency division multiple access communication system, comprise step:
At user equipment (UE) place receiving resource allocation information;
Resource by UE based on whether enabling saltus step and mirror image and described resource allocation information and be identified for transfer of data; WithAnd
Utilize determined resource to send data from UE to Node B.
8. method according to claim 7, wherein, described saltus step is intersubband saltus step.
9. method according to claim 7, wherein, described mirror image is mirror image in subband.
10. method according to claim 7, wherein, by random sequence function for determining making of mirror image in each communityEnergy.
11. methods according to claim 7 wherein, are determined enabling of saltus step and mirror image in the time that data send.
12. methods according to claim 7, wherein, the period of carrying out saltus step and mirror image be in time slot and subframe at leastOne.
13. 1 kinds for receiving the device of the Node B of data, bag from user equipment (UE) in single-carrier frequency division multiple access communication systemDraw together:
Scheduler, for sending resource allocation information, and based on whether enabling saltus step and mirror image and described resource allocation informationBe identified for receiving from UE the resource of data;
Remove mapper, the data that receive from UE for the mapping of making a return journey by determined resource; And
Decoder, for the data of decoding after mapping.
14. devices according to claim 13, wherein, described saltus step is intersubband saltus step.
15. devices according to claim 13, wherein, described mirror image is mirror image in subband.
16. devices according to claim 13, wherein, by random sequence function for determining making of mirror image in each communityEnergy.
17. devices according to claim 13 wherein, are determined enabling of saltus step and mirror image in the time of data receiver.
18. devices according to claim 13, wherein, the period of carrying out saltus step and mirror image be in time slot and subframe at leastOne.
19. 1 kinds for sending the device of the user equipment (UE) of data, bag to Node B in single-carrier frequency division multiple access communication systemDraw together:
Data Transmission Control Unit, for receiving resource allocation information, and based on whether enabling saltus step and mirror image and described resourceAssignment information is identified for the resource of transfer of data; And
Mapper, for sending to Node B by data-mapping to determined resource and by the data after mapping.
20. devices according to claim 19, wherein, described saltus step is intersubband saltus step.
21. devices according to claim 19, wherein, described mirror image is mirror image in subband.
22. devices according to claim 19, wherein, described Data Transmission Control Unit comes for often by random sequence functionEnabling of mirror image determined in individual community.
23. devices according to claim 19, wherein, described Data Transmission Control Unit in the time that data send, determine saltus step andEnabling of mirror image.
24. devices according to claim 19, wherein, the period of carrying out saltus step and mirror image be in time slot and subframe at leastOne.
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| KR1020070080204A KR20080065523A (en) | 2007-01-09 | 2007-08-09 | Method for frequency hopping in single carrier frequency division multiple access system |
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| KR1020070126476A KR100942289B1 (en) | 2007-01-09 | 2007-12-07 | Method and apparatus for resource allocation in single carrier frequency division multiple access system |
| CN2008800019250A CN101578781B (en) | 2007-01-09 | 2008-01-09 | Apparatus and method for allocating resources in a single carrier-frequency division multiple access system |
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| CN201310052672.2A Active CN103152831B (en) | 2007-01-09 | 2008-01-09 | The apparatus and method of Resources allocation in single carrier-frequency division multiple access system |
| CN201210339521.0A Active CN102868423B (en) | 2007-01-09 | 2008-01-09 | For equipment and the method for Resources allocation in single carrier-frequency division multiple access system |
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| CN102868423B (en) | 2015-09-23 |
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| KR100942289B1 (en) | 2010-02-16 |
| CA2674964A1 (en) | 2008-07-17 |
| AU2008204078A1 (en) | 2008-07-17 |
| JP5138704B2 (en) | 2013-02-06 |
| JP5362056B2 (en) | 2013-12-11 |
| CN103152831A (en) | 2013-06-12 |
| KR20080065523A (en) | 2008-07-14 |
| JP2010512100A (en) | 2010-04-15 |
| CN101578781B (en) | 2013-04-10 |
| JP2013017227A (en) | 2013-01-24 |
| AU2008204077A1 (en) | 2008-07-17 |
| AU2008204078B2 (en) | 2011-05-19 |
| CA2675053A1 (en) | 2008-07-17 |
| RU2411653C1 (en) | 2011-02-10 |
| CN101632242A (en) | 2010-01-20 |
| CN101578781A (en) | 2009-11-11 |
| CN102868423A (en) | 2013-01-09 |
| JP2014180063A (en) | 2014-09-25 |
| KR20080065518A (en) | 2008-07-14 |
| AU2008204077B2 (en) | 2011-06-30 |
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