CN101578781A - Apparatus and method for allocating resources in a single carrier-frequency division multiple access system - Google Patents
Apparatus and method for allocating resources in a single carrier-frequency division multiple access system Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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
An apparatus and method for allocating resources in an Single Carrier-Frequency Division Multiple Access (SC-FDMA) communication system are provided, in which a Node B determines on a cell basis whether to turn or off inter-subband hopping and whether to turn on or off mirroring for a resource unit for the UE on a frequency axis along which at least two subbands are defined, at set hopping times, selects a resource unit by selectively performing inter-subband hopping and mirroring on the resource unit for the UE according to the determination, and allocates the selected resource unit to the UE.
Description
Technical field
The present invention relates to a kind of being used for distributes the method and apparatus of control channel transfer resource at single-carrier frequency division multiple access (SC-FDMA) wireless communication system efficiently when Packet Data Channel and control channel when the same transmission period is transmitted.
Background technology
Fig. 1 is that (wherein, local FDMA is an a kind of SC-FDMA system to local FDMA for Localized FDMA, the LFDMA) block diagram of the transmitter in.Though this transmitter is configured to use discrete Fourier transform (DFT) (DFT) and contrary fast fourier transform (IFFT) in situation shown in Figure 1, any other configuration also can be used for this transmitter.
With reference to Fig. 1, the use of DFT and IFFT helps to change with low hardware complexity the parameter of LFDMA system.With regard between OFDM (OFDM) and the SC-FDMA with regard to the difference aspect the transmitter configuration, the LFDMA transmitter also comprises the DFT precoder 101 that is positioned at IFFT processor 102 front ends, it is used for multi-carrier transmission in the OFDM transmitter.In Fig. 1, transmission (TX) modulated symbol 103 offers DFT precoder 101 with being become piece.The output of DFT is comprising the input that the wave band of continuous subcarrier (band) is mapped to IFFT.The effect of mapper 104 is that the transmission modulated symbol is mapped to actual frequency band (frequency band).
Fig. 2 illustrates the sample data transmission that subscriber equipment is assigned with them in the traditional SC-FDMA system resource is carried out.
With reference to Fig. 2, a Resource Unit (RU) 201 is defined by the one or more subcarriers on the frequency and temporal one or more SC-FDMA code element.For transfer of data, two RU that indicate oblique line are assigned to UE1, and three RU that indicate a little are assigned to UE2.
The RU that UE1 and UE2 are used for sending data be in time fix and be continuous in predetermined frequency band.This Resource Allocation Formula or data transmission scheme optionally will provide the frequency resource allocation of good channel conditions to each UE, thereby with limited system resource maximum system performance.For example, compare with other frequency band, the piece that indicates oblique line provides characteristics of radio channels relatively preferably to UE1, and the piece that indicates a little provides characteristics of radio channels relatively preferably to UE2.Optionally distribute resource to be called as frequency selectivity resource allocation or frequency selective scheduling with better channel response.The same with the above-mentioned uplink data transmission from UE to the Node B, frequency selective scheduling is applicable to the downlink transmission from the Node B to UE.On down link, 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.
Yet frequency selective scheduling is not always effective.For the fast-changing UE that moves rapidly and experience thus channel status, frequency selective scheduling is not easy.More particularly, although the node B scheduling device distributes the frequency band that is in relative good channel conditions to UE in preset time, but when UE received from the resource allocation information of Node B and will send data with the resource of being distributed, UE but was arranged in the channel circumstance that has been changed significantly.Therefore, the unpromising UE of selected frequency band guarantees good relatively channel status.
Even in the service that constantly is used for transfer of data as a spot of frequency resource of needs based on the voice (VOIP) of Internet Protocol, if UE reports its channel status to be used for frequency selective scheduling, then signaling consumption may be huge.In the case, use frequency hopping (frequency hopping) more effective than the scheduling of frequency of utilization selectivity.
Fig. 3 illustrates the example frequency hopping in the traditional F DMA system.
With reference to Fig. 3, distribute to the frequency resource that UE is used for transfer of data and change in time.Frequency hopping has such effect: make channel quality and interference randomization during the transfer of data.Because data are transmitted with time dependent frequency resource,, thereby realized diversity so data have the different characteristics of channel and data are disturbed by the different UEs in the neighbor cell at each time point.
Yet in SC-FDMA system as shown in Figure 3, as RU during according to pattern saltus step independently, frequency hopping is infeasible.For example, if RU 301 and 302 is assigned to different UE, then not serious.Yet, if RU 301 and 302 the two all be assigned to single UE, they jump to position RU 303 and 304 by carrying out frequency hopping at next transmission point.Because RU 303 and 304 is discontinuous, so UE can not transmit data with these two RU.
In this case, in order in the SC-FDMA system, to realize frequency diversity, propose to substitute frequency hopping with mirror image (mirroring).
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 the A of sub-district, in next transmission time, RU 401 is mirrored onto RU 403 and RU 402 is mirrored onto RU 404.In an identical manner, in the B of sub-district, in next transmission time, RU 405 is mirrored onto RU 406.Mirror image makes that continuous RU can saltus step be continuous, thereby satisfies single-carrier property during frequency hopping.
Shortcoming with frequency hopping of frequency diversity is that saltus step pattern (hopping pattern) fixes, because under situation not with respect to the centre frequency mirror image, and never mobile RU.Though this means and realized that to a certain extent frequency diversity still is difficult to realize interference randomization.When the RU that jumps to relative position returns its original position by mirror image, have only a kind of RU saltus step pattern to use.Therefore, even when having a plurality of sub-district, each sub-district can not have different patterns.
With reference to Fig. 4, be assigned to UE among the B of sub-district if indicate RU 405 that a little RU 402 is assigned to the UE among the A of sub-district and indicates the monocline line at the fixed time, the UE of the UE interfered cell B among the A of sub-district then is because have only a kind of saltus step pattern to use in the mirror image scheme.If the UE of sub-district B is when the A of sub-district, it will cause huge interference to the UE among the A of sub-district.As a result, use the UE of the sub-district A that indicates RU a little to be subjected to quality of reception deterioration.
Summary of the invention
One aspect of the present invention is to deal with problems at least and/or is unfavorable and advantage described below is provided at least.Correspondingly, one aspect of the present invention provide be to provide a kind of be used for when adopt mirror image when realizing frequency diversity Resources allocation with the method and apparatus of the interference between the randomization neighbor cell.
Another aspect of the present invention is to provide a kind of being used for to determine that according to the different mirror image unlatching/shutoff pattern of each sub-district in each frequency hopping time be the method for opening or turn-offing mirror image, and the transmission/receiving system that uses this 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, determine that according to the different pattern of each sub-district in each frequency hopping time be the method for opening or turn-offing frequency hopping and mirror image, and the transmission/receiving system that uses this method.
According to another aspect of the present invention, providing a kind of is used in single-carrier frequency division multiple access SC-FDMA communication system to the user equipment (UE) method of allocating resources, wherein: at each predetermined bound-time, on frequency axis, the Resource Unit that is used for UE is carried out the intersubband saltus step, wherein defined at least two subbands along frequency axis; At each predetermined bound-time, be that the basis determines that in the subband of the Resource Unit of saltus step having be to open or the shutoff mirror image with the sub-district; And by determining that according to described optionally the Resource Unit of mirror image institute saltus step is selected Resource Unit, and give UE with selected resource unit allocation.
According to another aspect of the present invention, provide a kind of in single-carrier frequency division multiple access SC-FDMA communication system by from the Node B method of allocating resources, wherein: at each predetermined bound-time, on frequency axis, the Resource Unit that is used for user equipment (UE) is carried out the intersubband saltus step, wherein defined at least two subbands along frequency axis; At each predetermined bound-time, determine that according to the schedule information that receives from Node B the subband of the Resource Unit of saltus step having be to open or the shutoff mirror image; And by determining that according to described optionally the Resource Unit of mirror image institute saltus step is selected Resource Unit, and send data to Node B with selected Resource Unit.
According to another aspect of the present invention, providing a kind of is used at the device of single-carrier frequency division multiple access SC-FDMA communication system to the Node B of user equipment (UE) Resources allocation, wherein scheduler is carried out intersubband saltus step to the Resource Unit that is used for UE at each predetermined bound-time on frequency axis, wherein at least two subbands have been defined along frequency axis, be to be to open or the shutoff mirror image in the subband of the basis Resource Unit of determining to have institute's saltus step at each predetermined bound-time with the sub-district, and by determining that according to described optionally the Resource Unit of mirror image institute saltus step is selected Resource Unit; The data that mapper receives from UE according to the information separated about selected Resource Unit that receives from scheduler; And the data of decoder decode separation.
According to another aspect of the present invention, a kind of device that is used for sending to Node B in single-carrier frequency division multiple access SC-FDMA communication system the user equipment (UE) of data is provided, wherein Data Transmission Control Unit is carried out intersubband saltus step to the Resource Unit that is used for user equipment (UE) at each predetermined bound-time on frequency axis, wherein defined at least two subbands, and determine to have the subband of Resource Unit of institute's saltus step according to the schedule information that receives from Node B at each predetermined bound-time be to open or the shutoff mirror image along frequency axis; Mapper to by according to the described Resource Unit of determining that the resource of the described institute of mirror image saltus step is optionally selected, and sends data with the Resource Unit that is shone upon to Node B with data map.
Description of drawings
From the detailed description below in conjunction with accompanying drawing, above and other purpose, the feature and advantage of specific example embodiment of the present invention will be clearer, in the accompanying drawings:
Fig. 1 is at the block diagram as the transmitter in the traditional LFDMA system of a kind of SC-FDMA system;
Fig. 2 is shown in the sample data transmission that UE is assigned with them in the traditional SC-FDMA system resource is carried out;
Fig. 3 is shown in the example frequency hopping in the traditional F DMA system;
Fig. 4 illustrates mirror image;
Fig. 5 A and 5B diagram are 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 the block diagram according to the UE of example embodiment of the present invention;
Fig. 8 is the block diagram according to the Node B of example embodiment of the present invention;
Fig. 9 diagram is according to the channel architecture of another example embodiment of the present invention;
Figure 10 A is to the method for Figure 10 D diagram according to second example embodiment of the present invention;
Figure 11 is the flow chart of selecting the operation of RU in UE or Node B according to second example embodiment of the present invention;
Figure 12 diagram is according to the channel architecture of the 3rd example embodiment of the present invention;
Figure 13 illustrates being used for not considering to mix automatic repeat requests (HARQ) of the 3rd example embodiment according to the present invention and the method for execution mirror image;
The method that is used for carrying out mirror image of Figure 14 diagram the 3rd example embodiment according to the present invention at each HARQ process;
Figure 15 diagram is according to the method at each HARQ process execution mirror image of the 4th example embodiment of the present invention.
Embodiment
Furnish an explanation define in the book such as concrete structure and the content the element to help complete understanding example embodiment of the present invention.Correspondingly, those of ordinary skill in the art will appreciate that, under the situation that does not break away from the spirit and scope of the present invention, can carry out variations and modifications to the embodiments described herein.In addition, for clarity and conciseness for the purpose of, omit description to known function and structure.
Example embodiment of the present invention provides a kind of method, be used for satisfying the single-carrier property (property) in the uplink SC-FDMA system simultaneously when the degree of randomization (randomization) that when each scheduled time sends data with the realization frequency diversity with different RU, increases the interference of minizone according to general frequency hopping or mirror image scheme.
In order to understand the present invention better, carry out as giving a definition for data channel:
Frequency scheduling (FS) band: the set of the RU that distributes by frequency selective scheduling.They are continuous or disperse.
Frequency hopping (FH) band: be transmitted set with the RU that realizes frequency diversity.These RU do not distribute by frequency selective scheduling.They are continuous or disperse.The FH band can comprise one or more sub-FH bands.
Mirror image: RU with respect to the center subcarrier in the sub-FH band or center RU from left to right or saltus step symmetrically from right to left.
Bound-time: the RU saltus step that is distributed or by the time of mirror image.Depend on how saltus step or mirror image apply, and RU has the following period.
1. in supporting subframe between saltus step and subframe during saltus step, the described period is a time slot.
2. when only supporting between subframe saltus step, the described period is a subframe.
The method that example embodiment of the present invention provides a kind of different mirror image unlatching/shutoff pattern according to each sub-district to open mirror image or turn-off mirror image.Use different mirror image unlatching/shutoff patterns as far as possible and reduce mirror image is opened simultaneously in the sub-district probability for different districts and make the maximum effect of interference randomization of minizone.
Fig. 5 A and Fig. 5 B diagram are according to the method for example embodiment of the present invention.Fig. 5 A diagram does not consider to mix the timeslot-based mirror image of automatic repeat requests (HARQ), and the 5B diagram is at the independently mirror image (independent mirroring) of each HARQ process.
With reference to Fig. 5 A, there are sub-district 501 and sub-district 502 (sub-district A and sub-district B).Owing to supposed saltus step in the subframe, so the saltus step period is a time slot.On the basis of time slot, pattern 503 in the A of sub-district and each bound-time in the pattern 512 among the B of sub-district are carried out mirror image, wherein pattern 503 is for opening, open, open, turn-off, open, turn-off, turn-off, turn-offing ..., pattern 512 is for opening, turn-off, open, open, turn-off, turn-off, open, opening ....
In the A of sub-district, at bound-time k, RU 504 is assigned to UE A.Owing to open for UE A mirror image at next bound-time (k+1), UE A uses the RU 505 in the time slot (k+1).Turn-off at bound-time (k+3) mirror image, therefore at time slot (k+3), UE A sends data with the RU 506 identical with the RU of use in the last time slot (k+2).Similarly, owing to turn-off at bound-time (k+6) mirror image, therefore at time slot (k+6), UE A sends data with the RU 507 identical with the RU of use in the last time slot (k+5)
In an identical manner, in the B of sub-district, at time slot k, RU 508 is assigned to UE B.Owing to turn-off, use RU 509 at time slot (k+1) UE B at next bound-time (k+1) mirror image.At bound-time (k+3), mirror image is opened, and therefore at time slot (k+3), UE B uses RU 510.Similarly, owing to open at bound-time (k+6) mirror image, so at time slot (k+6), UE B uses RU 511.
In each sub-district, mirror image is opened or is turn-offed at each bound-time according to different pattern.Therefore, though the UE in the different districts may use identical RU in given time slot, owing to having used different mirror image unlatching/shutoff patterns to make that different districts uses the probability of identical RU to reduce in next time slot.For example, at time slot k, RU 504 and RU 508 are assigned to UE A among the A of sub-district and the UE B among the B of sub-district respectively.If UE B is near sub-district A, then UE B may greatly disturb UE A.Yet, because UE A opens mirror image at next bound-time (k+1),, turn-off, so UE B sends data with the RU identical with the RU that uses 509 in last time slot for UE B mirror image so UE A sends data with RU 505 in time slot (k+1).Therefore, at time slot (k+1), UE A uses different RU with UE B.
Among Fig. 5 B among illustrated mirror method and Fig. 5 A similarity of illustrated mirror method be: different mirror image unlatching/shutoff patterns is used in different sub-districts, among Fig. 5 A illustrated before a kind of method place of being different from a kind of method in illustrated back among Fig. 5 B be: RU be with respect to the RU in the same HARO process by mirror image, rather than with respect to the RU in the last time slot by mirror image.In Fig. 5 B, for the UE of sub-district 513 (sub-district A), at jumping moment k, mirror image is opened.Therefore, UE uses the RU 518 of 517 mirror images of RU that use in the last time slot (k-RRT+1) of same HARQ process, rather than uses the RU of the RU institute mirror image that uses in the last time slot (k-1).RTT represents two-way time (RoundTrip Time), and it is defined in for the response that is sent out data is to negate to reply (NACK) and be the time that initial transmission spent in the situation of affirmative acknowledgement (ACK) for the response of the data that are retransmitted.Therefore, the data that send with RU 518 and RU 519 are retransmission version of the data that send with RU 516 and RU 517 or belong to same HARQ process with the data that send with RU 516 and RU 517.Mirror image based on HARQ RTT helps to define a kind of for initial transmission and the mirror image unlatching/shutoff scheme that retransmits the different RU of use.Although have this advantage, the mirror image unlatching/shutoff patterns different for each HARO process management have increased complexity.In the case, mirror image unlatching/shutoff pattern is confirmed as following situation.
(1) at each bound-time mirror image according to predetermined sequence (sequence) unlatching/shutoff.Need turn-off for opening still by described sequence rotating mirror picture, rather than the position of indicating RU to want saltus step.Therefore, described sequence is made up of two values.In general, binary sequence is formed by 1 and 0.
(2) a plurality of sequences are generated and distribute to the sub-district, make to use different patterns for neighbor cell at least, thereby the RU that minimizes between the sub-district conflict.For example, one group of orthogonal code such as Walsh (Walsh) sign indicating number is assigned to each sub-district and each sub-district is determined mirror image unlatching/shutoff at each bound-time according to code value 0 or 1.Replacedly, mirror image unlatching/shutoff can be determined according to pseudo noise (PN) sequence that has specific seed for each sub-district in each sub-district.Compare with preceding a kind of method, a kind of method in back has increased the degree of randomization of minizone and has therefore minimized the phenomenon of saltus step in the same manner of the RU in the different districts.In the situation based on the method for PN sequence, example embodiment of the present invention will be described below.
In order to generate the PN sequence, use the seed of sub-district specific (cell-specific) to obtain identical PN sequence, the UE in the same sub-district should receive identical timing information.Timing information can be represented as absolute time and the difference between the current time or frame count common time (common time framecount), for example system-frame quantity (SFN).
Fig. 6 is the flow chart according to the operation of the mirror image unlatching/shutoff among definite UE of example embodiment of the present invention.In order to receive data from UE, Node B can be carried out identical operations.
With reference to Fig. 6, when Node B is UE scheduling RU, generates the PN sequential value and check the PN sequential value in step 602 at step 601UE.If the PN sequential value is 0, then in step 604, UE turn-offs mirror image.If the PN sequential value is 1, then in step 603, UE opens mirror image.In step 605, UE selects to be used for the RU of next transfer of data according to the mirror image unlatching/shutoff of decision in step 603 or step 604.In step 606, UE sends data with selected RU.
Mirror image causes the center symmetry saltus step of RU with respect to total FH band.The new RU that is used for next time slot can be based on the information of the RU that uses about last time slot and is detected.Mirror image is represented as formula (1):
H(r)＝N
FH-r ......(1)
Wherein, r represents the RU as the mirror image basis.The mirror image basis is the RU that uses in the last time slot in the same HARQ process among the RU that uses in the last time slot among Fig. 5 A and Fig. 5 B.H (r) is illustrated in the RU that the mirror image basis is mirrored onto in the time slot.N
FHThe total quantity of RU in the expression FH band.
Fig. 7 is the block diagram according to 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) but in data quantity transmitted determine by node B scheduling.Serial-the sequence of data symbols is converted to the paralleled code element sequence to-parallel (S/P) transducer 704.DFT processor 705 is converted to frequency signal with the paralleled code element sequence, is used for the SC-FDMA transmission.The DFT size equals from the quantity of the data symbols of data symbols maker 703 generations.Mapper 706 is mapped to frequency signal the frequency resource of distributing to UE based on the RU information that receives from Data Transmission Control Unit 702.Data Transmission Control Unit 702 generates RU information based on RU information of being dispatched and mirror image unlatching/shutoff information.Each sub-district has the different mirror image unlatching/shutoff pattern according to the PN sequence.Therefore, PN sequence generator 701 is necessary.In preceding method, the RU that use is to use the output of PN sequence generator 701 to determine.IFFT processor 707 becomes time signal with the conversion of signals of mapping.Parallel-as to convert time signal to serial signal to-serial (P/S) transducer 708, for transmission.
Fig. 8 is the block diagram according to the Node B of example embodiment of the present invention.
With reference to Fig. 8, S/P transducer 807 is that parallel signal and fft processor 806 are converted to frequency signal with this parallel signal with the conversion of signals that is received.Go mapper 805 based on the RU assignment information of determining by uplink scheduler 802, frequency signal is gone mapping at different UEs about each UE.Uplink scheduler 802 uses the RU information and the mirror image unlatching/shutoff information of being dispatched to generate RU information for each UE based on mirror image unlatching/shutoff pattern.Because each sub-district all has different mirror image unlatching/shutoff patterns, so need PN sequence generator 801.Output based on PN sequence generator 801 in preceding method decides the RU that will extract data from it.IDFT processor 804 with target (intended) UE (UE 1) to go the conversion of signals after shining upon be time signal.P/S transducer 808 is converted to serial signal with time signal.The data that data symbol decoder 803 demodulation receive from UE 1.
Sub-FH interband saltus step unlatching/shutoff and mirror image unlatching/shutoff combination, and by selecting a combination in the combination to make each sub-district have the position that different patterns is identified for the RU of transfer of data.That is to say that the resource of total system frequency band is divided into the FH band and FS is with and advises a kind of channel architecture, this channel architecture provides sufficient frequency hopping gain and the sufficient available band of realization in the FS band in the FH band.
Fig. 9 diagram is according to the channel architecture of 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 defined as FS with the center frequency-band between 901 and 903 and is with 902.Use FS can jump to sub-FH and be with 901 and 903, thereby obtain enough frequency hopping gains with 902 UE.Because FS is continuous so that cline frequency distributes maximization with 902 frequency, so can increase maximum data rate.
To describe a kind of method now, the single-carrier property in its channel architecture of considering to be advised is carried out saltus step of sub-FH interband and mirror image so that obtain enough frequency diversity gain and is realized that simultaneously variable RU distributes in each FH band.As carrying out in first example embodiment of the present invention, at each bound-time according to the sub-district specific pattern, sub-FH interband saltus step unlatching/shutoff and mirror image unlatching/shutoff.
Four kinds of combinations of sub-FH interband saltus step unlatching/shutoff and mirror image unlatching/shutoff are available, and are as shown in table 1.At each bound-time, select a kind of in the combination make up and use selected combination with different patterns with saltus step or/and mirror image is applied to each sub-district.
Table 1
| Combination | FH is with saltus | Mirror image | |
| 1 | | Open | |
| 2 | Turn-off | Turn- |
|
| 3 | Turn-off | |
|
| 4 | Open | Turn-off |
Figure 10 A describes second example embodiment of the present invention to Figure 10 D.
Figure 10 A and Figure 10 B are based on such hypothesis: support saltus step in the TTI in sub-district 1001 and 1007 (sub-district A and sub-district B).Therefore, the saltus step period is a time slot.
With reference to Figure 10 A and Figure 10 B, select according to the sub-FH interband saltus step unlatching/shutoff of table 1 and the combination of mirror image unlatching/shutoff with 3-4-2-1-3-2-1-4 with the 3-1-4-3-2-1-2-3 order and for sub-district B for sub-district A.
Although sub-district A uses RU 1002 at bound-time k, it selects RU 1005 according to combination 1 by saltus step of sub-FH interband and mirror image at bound-time (k+1).At next bound-time (k+2), according to combination 4, sub-district A only carries out the saltus step of sub-FH interband and does not carry out mirror image and therefore select RU 1003.Because combination 2 is set for bound-time (k+4), so sub-district A selects RU 1004 and does not carry out saltus step of sub-FH interband and mirror image.
Sub-district B selects to be used for the same RU 1008 of sub-district A at bound-time k.At bound-time (k+1), sub-district B does not carry out mirror image and selects RU 1009 by the saltus step of sub-FH interband according to combination 4, and by contrast, sub-district A according to combination 1 by not only carrying out the saltus step of sub-FH interband but also carry out mirror image and select RU 1005.Although another UE in time slot (k+1) in the B of sub-district may use the RU identical with RU 1005.Whether but with the conflicting but provide better interference randomization gain from the interference of different UEs constantly of same UE at each.
In Figure 10 C and the illustrated situation of Figure 10 D, carry out saltus step of sub-FH interband and mirror image with respect to the RU of the last data transfer that is used for same HARQ process rather than the RU that uses at last bound-time.
With reference to Figure 10 C, RU 1013 is selected in the sub-FH interband saltus step of the RU that uses in the sub-FH interband saltus step of the RU 1014 of the last data transfer of bound-time k by being used for same HARQ process rather than at bound-time (k-1).For bound-time k combination 4 is set, its meaning is for RU 1014, and sub-FH interband saltus step unlatching and mirror image turn-off.Therefore, select RU 1013 at bound-time k.Bound-time (k+1) it being provided with combination 3 is mirrored onto RU 1012 through the RU 1013 of sub-FH interband saltus step.
The method of the combination of using predetermined sequence chooser FH interband saltus step unlatching/shutoff and mirror image unlatching/shutoff will be described now.
(1) owing to need this sequence to indicate the combination of from four kinds of combinations of sub-FH interband saltus step unlatchings/shutoffs and mirror image unlatching/shutoff, selecting, and the position that does not need this sequence to indicate RU to want saltus step, so when this sequence of formation, can use four values.Usually, two of quaternary sequence or combination binary sequences are used to indicate the purpose of selected combination.Can generate this sequence with traditional method, therefore the detailed description to this method is not provided here.
(2) a plurality of sequences are generated and distribute to the sub-district, thereby make the RU that minimizes between them for the different pattern of neighbor cell application at least conflict.For example, will be assigned to the sub-district such as the set of the orthogonal code Walsh (Walsh) sign indicating number with man-to-man corresponding relation, and each sub-district is selected combination at each bound-time according to sequential value.Replacedly, each sub-district is according to the PN sequence selection combination that has the specific seed in sub-district.Compare as preceding a kind of method, a kind of method in back increases the degree of randomization of minizone, and thereby is minimized in the different districts RU with same mode saltus step.In the situation based on the method for PN sequence, example embodiment of the present invention will be described below.
In order to generate the PN sequence, use the specific seed in sub-district to obtain identical PN sequence, the UE in the same sub-district can receive identical timing information.This timing information can be represented as absolute time and the difference between the current time or common time frame count, SFN for example.
Figure 11 is the flow chart according to the operation of the UE of second example embodiment of the present invention.When Node B aforementioned operation when UE receives data is applicable to Node B.
With reference to Figure 11, when Node B is UE when dispatching specific RU, in step 1101, UE generates the PN sequential value and determines that in step 1102 the PN sequential value is 1,2,3 or 4.If the PN sequential value is 1, then in step 1103, UE selects the combination that mirror image is opened and sub-FH interband saltus step is opened.If the PN sequential value is 2, then in step 1104, UE selects the combination that mirror image turn-offs and sub-FH interband saltus step is turn-offed.If the PN sequential value is 3, then in step 1105, UE selects mirror image to turn-off and the combination of sub-FH interband saltus step unlatching.If the PN sequential value is 4, then in step 1106, UE selects mirror image to open and the combination of sub-FH interband saltus step shutoff.In step 1107, UE selects to be used for the RU of transfer of data by mirror image and/or saltus step according to selected combination.In step 1108, UE sends data with selected RU.
Except thereby PN sequence generator 701 and 802 generates a value in 1 to 4 four value and the value that is generated offered the position of Data Transmission Control Unit 702 and uplink scheduler 802 definite RU, the transmitter and receiver of second example embodiment has identical configuration with the transmitter and receiver of first example embodiment according to the present invention according to the present invention.
The channel architecture of Figure 12 diagram the 3rd example embodiment according to the present invention.
For wherein existing a plurality of sub-FH bands and saltus step always to occur in system between the sub-FH band as shown in figure 12, advise a kind of method of determining mirror image unlatching/shutoff for each sub-district according to different pattern.Use different mirror image unlatching/shutoff patterns to reduce the probability of in different districts, carrying out mirror image at one time for different districts, thereby cause the degree of randomization maximization of presence of intercell interference.
Figure 13 and Figure 14 describe the method according to the 3rd example embodiment of the present invention.Specifically, Figure 13 diagram and the irrelevant mirror method of HARQ, and Figure 14 is shown in the method for carrying out mirror image on the HARQ process basis.
With reference to Figure 13, because hypothesis sub-district 1301 and sub-district 1311 (sub-district A and sub-district B) support saltus step in the subframe, so the saltus step period (hopping period) is a time slot.In the A of sub-district, in the B of sub-district, carry out mirror image at each bound-time according to pattern 1320 according to pattern 1310, wherein, pattern 1310 is for opening, open, turn-off, turn-off, open, turn-off, turn-off, turn-offing ..., and pattern 1320 is for opening, turn-off, turn-off, open, turn-off, turn-off, open, opening ....
If in the A of sub-district, at jumping moment k, the RU 1302 among the sub-FH band # 1 is assigned to UE because the saltus step of sub-FH interband always is suitable for, so UE jumps to sub-FH band # 2 and according to mirror image pattern 1310 by mirror image.Therefore, at time slot (k+1), UE uses RU 1303.At next bound-time (k+2), UE is by jumping to sub-FH band # 1 and turn-offing mirror image and select RU 1304.At next bound-time (k+3), mirror image turn-offs owing to jump to sub-FH band # 2 generation, so at time slot (k+3), UE uses RU 1305.
A compares with the sub-district, has defined a kind of different mirror image unlatching/shutoff pattern for sub-district B.In other words, for each sub-district, at each bound-time, mirror image is opened by different way/is turn-offed.Although sub-district A and sub-district B can select same RU at given bound-time, the 3rd example embodiment of the present invention has reduced the probability of selecting same RU in two sub-districts at next bound-time.
For example, be assigned to respectively under the situation of UE A among the A of sub-district and the UE B among the B of sub-district for identical RU 1302 and 1312 of the scheduled time therein, if UE B near sub-district A, then at bound-time k, UE A may be subjected to the very big interference of UE B.Yet, owing to not only carry out the saltus step of sub-FH interband but also carry out mirror image at next bound-time (k+1) sub-district A, so UE A sends data at time slot (k+1) with RU 1303, and for sub-district B, sub-FH interband saltus step unlatching and mirror image turn-off, so UE B sends data at time slot (k+1) with RU 1313.Therefore, UE A uses different RU with UE B at time slot (k+1), thereby has avoided the continuous interference from same UE.
Among Figure 14 among illustrated mirror method and Figure 13 the similarity of the method for illustrated mirror image be: mirror image defers to the saltus step of sub-FH interband and different districts uses different mirror image unlatchings/shutoff patterns, and the difference of the former with the latter is: with respect to the RU in the same HARQ process but not come mirror image RU with respect to the RU in last transmission time use.
Just, at bound-time (k+RTT), the UE in sub-district 1401 (sub-district A) uses the RU 1406 that uses in the time slot (k+1) of same HARQ process by the RU 1407 of mirror image, rather than uses the RU that uses in last time slot (k+RTT-1) by the RU of mirror image.Be convenient to define mirror image unlatching/shutoff pattern based on the mirror image of HARQ RTT, wherein use different RU with retransmitting for initial transmission, thus maximization interference diversity effect.
When selecting RU, except the saltus step of sub-FH interband took place all the time, UE determined mirror image unlatching/shutoff in the mode identical with first example embodiment of the present invention.
In order to realize the 3rd example embodiment of the present invention, for example provide saltus step pattern formula according to equation (2).UE uses the index of saltus step pattern formula and institute's scheduled resources piece to learn the Resource Block that will use in each transmission time.Equation (2) will be used for the intersubband saltus step based on the displacement (shifting) of subband.
O
s＝f_s-N
o·h(t)，O
s＝O
s modN_RB
if 0≤O
s＜N
s
f
hop(i)＝N
o·h(i)+O
s+{(Ns-1)-2×(O
smod(N
s))}×m(i)
f
hop(i)＝f
hop(i)modN_RB
else if N
s≤O
s
f
hop(i)＝N
o·h(i)+O
s+{(N
o-1)-2×((O
s-N
s)mod(N
o))}×m(i)
f
hop(i)＝f
hop(i)modN_RB
......(2)
O wherein
sThe side-play amount (offset) of the Resource Block of UE apart from the cyclic shift reference point given in the expression scheduling, f_s represents the index according to the Resource Block of scheduling grant (scheduling grant) distribution, h (t) is illustrated in scheduling time (t) institute scheduled resources piece and is recycled the degree of displacement, f
Hop(i) be illustrated in the index of Resource Block after bound-time (i) saltus step, N_RB represents to can be used for the total quantity of the Resource Block of transfer of data, and N
oAnd N
sIt is the maximum quantity that can be scheduled for the Resource Block of the UE that carries out saltus step.
If the total N_RB of Resource Block is not the multiple of number of sub-bands M, the quantity N of the Resource Block that then special subband has
sQuantity N than other subband Resource Block separately
oFew.Because equation (2) supposes to have only a subband to have the Resource Block of lesser amt, so N
oAnd N
sCalculate by equation (3).
In equation (2), h (i) represents cyclic shift degree (cyclic shift degree), its be according to the bit value of random sequence select 0,1 ..., among the M} one.h(0)＝0。M (i) is a parameter of determining to locate at bound-time (i) mirror image unlatching/shutoff, its be 0, among the 1} one.M (i) selects according to the bit value of random sequence, or selects by h (i)=x/2 and m (i)=xMod (2), wherein x be according to the bit value of random sequence select 0,1 ..., among the M} one.If m (i)=0, then mirror image turn-offs, if m (i)=1, then mirror image is opened.
In order to describe very much equation (2) in detail, by the first capable side-play amount O that at first calculates the scheduling time of institute's scheduled resources piece of equation (2)
sO
sApart from the cyclic shift reference point how far the Resource Block of indication cyclic shift.
O
sFor following former thereby introducing.When the total quantity N_RB of Resource Block is not the multiple of number of sub-bands M, the stock number difference that subband has, the intersubband saltus step that this leads to the failure.Therefore, in the 3rd example embodiment of the present invention, subband is formed the quantity N of the Resource Block that makes that a subband has
oQuantity N than the Resource Block of each subband in other subband
sFew, and O
sBe used to indicate subband with less Resource Block quantity to UE.
For example, if N_RB be 22 and M be 4, then subband can be configured to make the subband of winning have four Resource Block and each subband in other subband has six Resource Block.In this sub band structure, if O
sLess than 4, then UE knows that institute's scheduled resources piece is arranged in less subband.
According to first conditional statement of equation (2), then institute's scheduled resources piece is with respect to Resource Block 0 to N
s-1 according to side-play amount O
sBe recycled displacement, then at N
sIndividual Resource Block is interior by mirror image.If m (i)=0, then mirror image turn-offs.
If O
sGreater than N
s(this hint institute scheduled resources piece is positioned at normal band) then carries out cyclic shift according to the second condition statement of equation (2), then at N
oCarry out mirror image in the individual Resource Block.If m (i)=0, then mirror image turn-offs.
According to subband arrangement, a plurality of subbands can have N separately
sIndividual Resource Block, a plurality of remaining subbands can have N separately simultaneously
oIndividual Resource Block.For example, if provide 4 subbands, two subbands have five Resource Block separately, and other two subbands have six Resource Block separately.The conditional statement of the subband that this situation can be dispatched by the indication of using side-play amount to revise equation (2) and easily realizing.
If mirror image is opened or turn-offed according to random pattern in each sub-district, then continuous mirror image unlatching/shutoff has increased UE in the different districts carries out transfer of data with identical RU probability.Consider that with regard to channel quality it is first-selected obtaining enough frequency diversities in each transmission time when sending data by the HARQ process, be necessary to allow the UE different RU of selection under the situation of the continuous data transmission such as initial transmission and retransmitting at least.In order to accomplish this point, the 4th example embodiment of the present invention is advised a kind of method of limited use, this method be used for when needs, generating at random mirror image pattern and according to this at random mirror image pattern determine mirror image unlatching/shutoff.When both supporting in the subframe that saltus step is also supported between subframe in saltus step, always open at each bound-time mirror image for a scheme in two saltus step schemes, and for another saltus step scheme mirror image with mirror image unlatching/shutoff pattern at random and open/turn-off.
Being used for of Figure 15 diagram the 4th example embodiment according to the present invention always opens mirror image and determines the method for mirror image unlatching/shutoff for saltus step in the subframe according to mirror image unlatching/shutoff pattern at random for saltus step between subframe.
As in the present invention's second example embodiment, sub-FH band is in the both sides of band system band and the FS band is inserted in the center frequency-band place between the sub-FH band.In order to obtain frequency diversity gain, as in the present invention's the 3rd example embodiment, at each bound-time RU in the saltus step of sub-FH interband.
With reference to Figure 15, bound-time in each subframe, in sub-district 1500 (sub-district A) according to pattern open, turn-off, turn-off ... and in sub-district 1520 (sub-district B) according to pattern turn-off, turn-off, open ... mirror image takes place.
When in the A of sub-district at bound-time (k-RTT) when RU is assigned to UE, at next jumping moment (k-RTT+1), UE selects RU 1503 by carrying out mirror image according to this mirror image unlatching/shutoff pattern.At the bound-time k as next transmission time of same HARQ process, mirror image is always opened.For the RU that selects to send with last transmission time in same HARQ process is in the RU of diverse location, the RU 1502 that uses in first time slot (k-RTT) in last HARQ transmission time by mirror image selects RU 1504.Owing to turn-off at next bound-time (k+1) mirror image according to mirror image unlatching/shutoff pattern, UE selects RU 1505.At the bound-time (k+RTT) as next transmission time of same HARQ process, mirror image is always opened.For the RU that selects Yu send in the last HARQ transmission time is in the RU of diverse location, RU 1504 is mirrored onto RU 1506.Owing to turn-off at next bound-time (k+RTT+1) mirror image according to mirror image unlatching/shutoff pattern, UE selects RU 1507.
In an identical manner, in the B of sub-district, RU opens/turn-offs mirror image by bound-time in each subframe according to mirror image unlatchings/shutoff pattern at random and jumps to another sub-FH and be with.That is to say,,, select RU 1509 by turn-offing mirror image according to mirror image unlatching/shutoff pattern then at next jumping moment (k-RTT+1) if in time slot (k-RTT), use RU 1508.Because at next HARQ transmission time mirror image is to carry out with respect to the RU 1508 that the last transmission time in same HARQ process uses, so select RU 1510 at bound-time k.At bound-time (k+1), mirror image turn-offs according to mirror image unlatching/shutoff pattern, and thereby selection RU 1511.Owing to carry out mirror image in next HARQ transmission time with respect to the RU 1510 that uses in the last transmission time of same HARQ transmission course, so select RU 1512 at bound-time (k+RTT).At bound-time (k+RTT+1), open according to mirror image unlatching/shutoff pattern mirror image, therefore select RU 1513.
As clearly visible from the above description, the invention has the advantages that: by opening or turn-off mirror image at each bound-time according to different mirror image unlatching/shutoff patterns in each sub-district, thereby the interference of randomize inter-cell increases the frequency diversity effect.
Although illustrate and described the present invention with reference to specific example embodiment of the present invention, but person of skill in the art will appreciate that, under the situation that does not break away from the spirit and scope of the present invention that claims and its equivalent limited, can carry out various changes on various forms and the details to the present invention.
Claims (24)
1. one kind is used in single-carrier frequency division multiple access SC-FDMA communication system to the user equipment (UE) method of allocating resources, and this method comprises:
At each predetermined bound-time, on frequency axis, the Resource Unit that is used for UE is carried out the intersubband saltus step, wherein defined at least two subbands along frequency axis;
At each bound-time, be that the basis determines that in the subband of the Resource Unit of saltus step having be to open or the shutoff mirror image with the sub-district; And
By determining that according to described optionally the Resource Unit of mirror image institute saltus step is selected Resource Unit, and give UE with selected resource unit allocation.
2. the method for claim 1, also comprise: before selective mirroring, generating each indication opens at a plurality of bound-time mirror images and still is the mirror image sequence of turn-offing and gives the sub-district with this sequence allocation, wherein, described determining step comprises that determining to open according to the bit value that with the sub-district is the sequence of basis distribution still is the shutoff mirror image.
3. the method for claim 1, wherein the Resource Unit of the described UE of being used for is to distribute to the Resource Unit of UE and be used for preceding once of Resource Unit of transmission of the automatic repeat requests HARQ of same mixing of data at last bound-time.
4. method as claimed in claim 2, wherein, each in the described sequence is in specific orthogonal code in the sub-district selected from the set of orthogonal code and the pseudo noise PN sequence with sub-district specific seed.
5. the method for claim 1 also comprises: if described subband has the Resource Unit of varying number, then
At each bound-time, be that the basis is determined to open still mirror image shutoff along the frequency axis mirror image in the subband of the Resource Unit with the described UE of being used for the sub-district;
Determine the position that the Resource Unit of the described UE of being used for will jump to according to the index of Resource Unit; And
By according to determined position and the unlatching of determined mirror image or mirror image shutoff execution frequency hopping and mirror image, select Resource Unit and give UE selected resource unit allocation.
6. the method for claim 1, wherein selective mirroring comprises: bound-time between predetermined subframe always carry out mirror image and in subframe bound-time determine optionally to carry out mirror image according to described.
One kind in single-carrier frequency division multiple access SC-FDMA communication system by from the Node B method of allocating resources, this method comprises:
At each predetermined bound-time, on frequency axis, the Resource Unit that is used for user equipment (UE) is carried out the intersubband saltus step, wherein defined at least two subbands along frequency axis;
At each bound-time, determine that according to the schedule information that receives from Node B the subband of the Resource Unit of saltus step having be to open or the shutoff mirror image; And
By determining that according to described optionally the Resource Unit of mirror image institute saltus step is selected Resource Unit, and transmit data to Node B with selected Resource Unit.
8. method as claimed in claim 7, wherein, described determining step comprises: opening at a plurality of bound-time mirror images according to the indication that receives from Node B still is that the bit value of the sub-district particular sequence that turn-offs of mirror image determines that the resource for institute's saltus step is unlatching or shutoff mirror image.
9. method as claimed in claim 7, wherein, the Resource Unit of the described UE of being used for is to distribute to the Resource Unit of UE and be used for preceding once of Resource Unit of transmission of the automatic repeat requests HARQ of same mixing of data at last bound-time.
10. method as claimed in claim 8, wherein, described sequence is in specific orthogonal code in the sub-district selected from the set of orthogonal code and the pseudo noise PN sequence with sub-district specific seed.
11. method as claimed in claim 7, wherein said selective mirroring comprises: bound-time between predetermined subframe always carry out mirror image and in subframe bound-time determine optionally to carry out mirror image according to described.
12. method as claimed in claim 7 also comprises: if described subband has the Resource Unit of varying number, then
At each bound-time, be that mirror image turn-offs according to determining to open still along the frequency axis mirror image from the schedule information of Node B reception in the subband of the Resource Unit with the described UE of being used on the basis with the sub-district;
Be identified for the position that the Resource Unit of UE will jump to according to the index of Resource Unit; And
By according to determined position and the unlatching of determined mirror image or mirror image shutoff execution frequency hopping and mirror image, select Resource Unit and send data to Node B with selected Resource Unit.
13. one kind is used at the device of single-carrier frequency division multiple access SC-FDMA communication system to the Node B of user equipment (UE) Resources allocation, this device comprises:
Scheduler is used on frequency axis the Resource Unit that is used for UE being carried out the intersubband saltus step at each predetermined bound-time, has wherein defined at least two subbands along frequency axis; Being used at each bound-time is that the basis determines that the subband of the Resource Unit of saltus step having is to open or the shutoff mirror image with the sub-district; And be used for by determining that according to described optionally the Resource Unit of mirror image institute saltus step is selected Resource Unit;
Mapper is used for the data that receive from UE according to the information separated about selected Resource Unit that receives from scheduler; And
Decoder is used to the data of decoding and separating.
14. device as claimed in claim 13, also comprise sequence generator, be used to generate the sequence that is used for the sub-district, each sequence indication is opened still at a plurality of bound-time mirror images, and mirror image turn-offs, wherein, described scheduler determines that according to the bit value that with the sub-district is the sequence of basis distribution unlatching still is the shutoff mirror image.
15. device as claimed in claim 13, wherein, described scheduler is carried out mirror image with respect to the Resource Unit of distributing to UE at last bound-time and preceding once of Resource Unit of transmission that is used for the automatic repeat requests HARQ of same mixing of data.
16. device as claimed in claim 14, wherein, described sequence generator is generated at the specific orthogonal code in the sub-district of sub-district with at the pseudo noise PN sequence with sub-district specific seed of sub-district by the set of orthogonal code.
17. device as claimed in claim 13, wherein, described scheduler bound-time between predetermined subframe always carry out mirror image and in subframe bound-time determine optionally to carry out mirror image according to described.
18. device as claimed in claim 13, wherein, if described subband has the Resource Unit of varying number, then scheduler is that the basis has and determines to open still along the frequency axis mirror image in the subband of the described Resource Unit that is used for UE mirror image turn-offs with the sub-district at each bound-time; Be identified for the position that the Resource Unit of UE will jump to according to the index of Resource Unit; And by opening according to determined position and determined mirror image or mirror image turn-offs and carries out the Resource Unit that frequency hopping and mirror image select to be used for UE.
19. one kind is used at the device of single-carrier frequency division multiple access SC-FDMA communication system to the subscriber equipment of Node B transmission data, this device comprises:
Data Transmission Control Unit, be used on frequency axis, the Resource Unit that is used for user equipment (UE) being carried out the intersubband saltus step at each predetermined bound-time, wherein defined at least two subbands, and determine to have the subband of Resource Unit of institute's saltus step according to the schedule information that receives from Node B at each bound-time be to open or the shutoff mirror image along frequency axis; And
Mapper is used for data map to by according to the described Resource Unit of determining that the resource of the described institute of mirror image saltus step is optionally selected, and sends data with the Resource Unit that is shone upon to Node B.
20. device as claimed in claim 19, wherein, it still is that the bit value of the specific sequence in the mirror image sub-district of turn-offing determines to open or turn-off mirror image to the resource of institute's saltus step that described Data Transmission Control Unit is opened at a plurality of bound-time mirror images according to the indication that receives from Node B, described device also comprises sequence generator, is used to generate described sequence.
21. device as claimed in claim 19, wherein, described Data Transmission Control Unit is carried out mirror image to the preceding once Resource Unit of transmission of distributing to the Resource Unit of UE at last bound-time or being used for the automatic repeat requests HARQ process of same mixing of data.
22. device as claimed in claim 20, wherein, described sequence generator generates the specific orthogonal code in the sub-district selected and has in the pseudo noise PN sequence of the specific seed in sub-district one from the set of orthogonal code.
23. device as claimed in claim 19, wherein said Data Transmission Control Unit bound-time between predetermined subframe always carry out mirror image and in subframe bound-time determine optionally to carry out mirror image according to described.
24. device as claimed in claim 19, if wherein described subband has the Resource Unit of varying number, then Data Transmission Control Unit is that the basis has according to the schedule information that receives from Node B and determines to open still along the frequency axis mirror image in the subband of the described Resource Unit that is used for UE mirror image turn-offs with the sub-district at each bound-time; Be identified for the position that the Resource Unit of UE will jump to according to the index of Resource Unit; And open or mirror image turn-offs and carries out frequency hopping and mirror image according to determined position and determined mirror image.
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| US9072095B2 (en) | 2007-01-09 | 2015-06-30 | Samsung Electronics Co., Ltd. | Apparatus and method for allocating resources in a single carrier-frequency division multiple access system |
| KR20080065518A (en) * | 2007-01-09 | 2008-07-14 | 삼성전자주식회사 | Method for frequency hopping in single carrier frequency division multiple access system |
| KR20100008150A (en) * | 2008-07-15 | 2010-01-25 | 삼성전자주식회사 | Apparatus and method for improving hybrid automatic repeat request combining gain in broadband wireless communication system |
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| JP4684628B2 (en) * | 2004-11-16 | 2011-05-18 | Ｋｄｄｉ株式会社 | Subcarrier allocation apparatus and multicarrier radio communication system |
| US8730877B2 (en) | 2005-06-16 | 2014-05-20 | Qualcomm Incorporated | Pilot and data transmission in a quasi-orthogonal single-carrier frequency division multiple access system |
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| KR20080065518A (en) * | 2007-01-09 | 2008-07-14 | 삼성전자주식회사 | Method for frequency hopping in single carrier frequency division multiple access system |
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| CN110892663A (en) * | 2017-07-11 | 2020-03-17 | 高通股份有限公司 | Uplink hopping patterns for hybrid automatic repeat request (HARQ) transmissions |
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