CN100563137C - A kind of method that in orthogonal frequency division multiple access system, realizes fast frequency hopping - Google Patents
A kind of method that in orthogonal frequency division multiple access system, realizes fast frequency hopping Download PDFInfo
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Abstract
The invention discloses a kind of method that realizes fast frequency hopping in orthogonal frequency division multiple access system, wherein, each subchannel of transmitting terminal uses a sub carrier group transmission OFDM symbol; In transmission course, upgrade the corresponding relation of subchannel and sub carrier group, make that the OFDM notation index of the corresponding relation of subchannel and sub carrier group and current transmission is relevant, and each subchannel uses the sub carrier group after the renewal to transmit described OFDM symbol.This method is by changing the fast frequency hopping of the mapping relations realization orthogonal frequency division multiple access system between subchannel and the sub carrier group, and need in the broadcast of system, not increase the information such as frequency hop sequences relevant with frequency hopping, save wireless interface resource, guaranteed the efficiency of transmission of system wireless interface.
Description
Technical field
The present invention relates to the frequency hopping of mobile communication system, specially refer to a kind of method that in OFDM (OFDMA) system, realizes fast frequency hopping.
Background technology
Frequency hopping is normally used a kind of anti-frequency interferences technology in mobile communication system.Because frequency interferences only can be disturbed the part frequency in the whole frequency band usually, therefore can pass through frequency hopping, make the carrier frequency constantly saltus step in a certain order within the specific limits of beared information, realize frequency interferences average between a plurality of users, reach anti-frequency interferences, improve the purpose of power system capacity.Wherein, the saltus step of carrier frequency order can define by frequency hop sequences.And in communication process, for correct demodulation, receiving terminal must be known the frequency hop sequences of transmitting terminal carrier frequency, and therefore in the system that realizes frequency hopping, transmitting terminal will send to receiving terminal with frequency hop sequences usually.Size according to frequency hopping rate can be divided into frequency hopping two kinds of slow frequency hopping and fast frequency hoppings usually, usually, can will be that the frequency hopping that unit carries out is called slow frequency hopping with the Frame, at this moment, all symbols use identical carrier frequency in the Frame, and the symbol of different pieces of information frame uses different carrier frequencies; And will be that the frequency hopping that unit carries out is called fast frequency hopping with one or several symbol of transmission, each symbol in the promptly same Frame all uses different carrier frequency transmission.Clearly, the height of frequency hopping rate will directly reflect the performance of frequency-hopping system, and frequency hopping speed is high more, and the frequency hopping gain is just big more, and jamproof performance is just good more, and for example: military frequency-hopping system can reach more than the per second jumpings up to ten thousand.
For the OFDMA system, OFDMA is the combination of OFDM modulation technique and FDMA multi-access mode.The OFDM technology becomes given channel distribution the subcarrier of many quadratures in frequency domain, parallel modulation of each subcarrier and transmission data.Because the frequency response of each subcarrier is a relatively flat, the therefore interference between the erasure signal waveform greatly.In addition, because in the OFDMA system, each subcarrier is mutually orthogonal, so their frequency spectrum can be overlapped, has further improved the availability of frequency spectrum so again.
In actual applications, because the bandwidth of each subcarrier is narrower, the signal rate that can carry is lower, therefore, the OFDMA system is divided into more than one sub carrier group with all subcarriers of OFDMA system usually, each sub carrier group comprises a plurality of subcarriers, and each sub carrier group that will be wherein is mapped as the subchannel of a logic, and each subchannel identifies by sub-channel index.In resource allocation, bandwidth demand according to the user distributes one or more than one subchannel to the user, and the OFDMA system can be according to the distribution condition of each mobile subscriber's subchannel of situation of change real time altering of factors such as current channel circumstance, allocated bandwidth, to obtain the higher frequency spectrum utilance.Need to prove that described sub-channel index only is a logical number, does not represent real physical resource here, it be by and subcarrier between mapping relations corresponding to real sub-carrier resources.
Agreement IEEE 802.16 has stipulated the subcarrier of a kind of OFDMA system and the mapping method of subchannel, is example with 2048 OFDMA, and this method is mapped to 1536 data subcarriers of OFDMA system on the subchannel of 32 logics, may further comprise the steps:
Step 1: in available subcarrier, distribute pilot sub-carrier earlier, and 1536 remaining data subcarriers renumber after will removing pilot sub-carrier, are subcarrier number of each subcarrier allocation;
Step 2: for each subchannel extracts 48 subcarriers, form each sub carrier group according to following formula (1), finish the mapping of 1536 data subcarrier to 32 subchannels.
Subcarrier(k，s)＝N×nk+{Ps[nk?mod?N]+CellID}mod?N (1)
Wherein, s is a sub-channel index, and span is 0～31, is used to identify 32 subchannels;
K is the sub-carrier indices of all subcarriers in each subchannel, and span is 0～47, is used for identifying 48 subcarriers of each subchannel;
(subcarrier number of k subcarrier, span are 0～1535 to Subcarrier for k, s) s subchannel of expression;
N represents subchannel number, at this moment N=32;
Ps[] be to constant series P=[3,18,2,8,16,10,11,15,26,22,6,9,27,20,25,1,29,7,21,5,28,31,23,17,4,24,0,13,12,19,14,30] sequence that moves to left and obtain after s time;
Ps[nk mod N] expression Ps[] N numerical value of nk mod in the sequence;
CellID is ID number relevant with the sub-district, is a fixed value for certain specific sub-district;
The effect of nk is not overlapping between the sub carrier group that guarantees through each subchannel correspondence of calculating, and nk can calculate by following formula (2):
nk＝(k+13×s)mod?M (2)
Wherein, M is each subchannel sub-carriers number, at this moment, and M=48.
In addition, the mod in formula (1) and the formula (2) is a modulo operation.
Calculating by above-mentioned formula (1) and formula (2) can be mapped to 32 subchannels respectively with 1536 data subcarriers of OFDMA system, also just be equivalent to 1536 data subcarriers of OFDMA system are divided into 32 sub carrier group, and these 32 sub carrier group are corresponding one by one with 32 subchannels.
For example, during CellID=0, can obtain sub-channel index through above-mentioned subcarrier abstracting method is that the subcarrier number of 48 subcarriers that subchannel comprised of 0 is respectively: 3,50,66,104,144,170,203,239,282,310,326,361,411,436,473,481,541,551,597,613,668,703,727,753,772,824,832,877,908,947,974,1022,1027,1074,1090,1128,1168,1194,1227,1263,1306,1334,1350,1385,1435,1460,1497,1505;
Sub-channel index is that the subcarrier number of 48 subcarriers that subchannel comprised of 1 is respectively: 441,449,509,519,565,581,636,671,695,721,740,792,800,845,876,915,942,990,995,1042,1058,1096,1136,1162,1195,1231,1274,1302,1318,1353,1403,1428,1465,1473,1533,18,34,72,112,138,171,207,250,278,294,329,379,404; ....
From top description as can be known, the OFDMA system is the least unit that frequency domain resource is distributed with the subchannel, promptly can distribute one or more subchannel for it according to user's bandwidth demand, the user uses and is pairing all the subcarrier transmission data of the subchannel of its distribution.
The sudden characteristics of data carried by data business in order to adapt to, improve system effectiveness, in existing OFDMA system, in each OFDMA frame, all need reasonably to distribute according to user's bandwidth demand Radio Resource to system, and by the broadcast in every frame the allocation of radio resources situation of present frame is broadcast to each user, the also the same content that comprises two aspects of Radio Resource here: time-domain resource and frequency domain resource with other system.Fig. 2 has shown the frame structure of the OFDMA system time division duplex of consensus standard IEEE802.16 regulation.As can be seen from Figure 2, in the OFDMA system, the two-dimentional resource of forming by time-domain and frequency domain for user's assigned radio resource, wherein, time-domain is corresponding to the OFDMA symbol at Fig. 2 top, wherein, k, k+1......k+26 represent the index according to each OFDMA symbol of the sequencing of time transmission; And frequency domain is corresponding to the subchannel of Fig. 2 left, and wherein, s, s+1...... represent that the OFDMA system assignment gives each sub-channel index of user.Downlink burst data bag 1～5 among the figure and uplink burst data bag 1～5 are illustrated respectively in the descending and uplink burst data of the different user that transmits in this frame.The OFDMA system is by being each sign resources and sub channel resource that has the user definition T/F two dimension Resource Block of transfer of data to distribute each user to use in descending and up broadcast, each user uses the subchannel transmission data of distributing in the symbol time that distributes.This T/F two dimension Resource Block can be setovered by symbol, subchannel biasing, symbolic number and four parameters of number of subchannels define.Shown in the downlink burst data bag 3 among Fig. 2, the OFDMA system is that notation index is from k+5 to k+15 for the T/F two dimension Resource Block of this allocation of packets, the Resource Block of sub-channel index from s to s+4, this Resource Block can setover 5 by symbol, symbolic number 11, subchannel biasing 0, number of subchannels 5 these four parameter-definitions.Through after the above-mentioned resource allocation, the user who sends downlink burst data bag 3 will use subchannel s to transmit this downlink burst data bag 3 to subchannel s+4 at k+5 in the symbol time of k+15.Similarly, other users in the system just according to distributing to its other resources assignment information in the system broadcast message, use corresponding subchannel transmission data in corresponding symbol time.
From top narration as can be seen, owing in the broadcast of each frame, all be included as user's deallocated resources assignment information that each has transfer of data, therefore, the sub channel resource that the OFDMA system is can be for the data allocations that same user is transmitted in the different pieces of information frame different, in this case, though the subchannel that this user uses in same frame is constant, this user has used different subchannels in different frame, thereby the OFDMA system can realize slow frequency hopping easily.
But, if in above-mentioned OFDMA system, realize being the fast frequency hopping that unit carries out with the OFDMA symbol, according to existing frequency-hopping method, in order to realize the correct demodulation of receiving terminal, transmitting terminal need issue information such as frequency hop sequences relevant with frequency hopping in the present frame in broadcast, indicate this user in each symbol time, to use which subchannel transmission data, also just be equivalent in same frame with the OFDMA symbol be unit for each user redistributes sub channel resource, make this user in different symbol times, use different subchannel transmission data.So just will inevitably increase the expense of broadcast greatly, must change the form of resource allocation message in the broadcast simultaneously, take more wireless interface resource, influence the wave point efficiency of transmission of system.Therefore, can't in the OFDMA system, realize fast frequency hopping by existing method.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of method that in the OFDMA system, realizes fast frequency hopping, can be at the form that does not change system resource allocation message, do not increase under the situation of system broadcast message expense, realize the fast frequency hopping of OFDMA system, when increasing OFDMA system antijamming capability, save wireless interface resource, guarantee the efficiency of transmission of system wireless interface.
In method of the present invention, each subchannel of transmitting terminal uses a sub carrier group transmission OFDM symbol; In transmission course, with the OFDM symbol is the corresponding relation that unit upgrades subchannel and sub carrier group, make that the OFDM notation index of the corresponding relation of subchannel and sub carrier group and current transmission is relevant, and each subchannel uses the sub carrier group after the renewal to transmit described OFDM symbol.
Renewal subchannel of the present invention is specially with the corresponding relation of sub carrier group: each subchannel obtains all subcarriers in the corresponding sub carrier group of this subchannel according to current OFDM notation index calculation of parameter respectively.
The following computing formula of computing application of the present invention:
Subcarrier(k，s，S-index)＝N×nk+{Ps[nk?mod?N]+CellID+S-index}mod?N
Wherein, s is a sub-channel index; K is the sub-carrier indices of each subchannel; S-index is an OFDM notation index parameter; (k, s S-index) are illustrated on S-index the OFDM symbol s subchannel, the subcarrier number of k subcarrier to Subcarrier; N represents subchannel number; Ps[] be to constant series P=[3,18,2,8,16,10,11,15,26,22,6,9,27,20,25,1,29,7,21,5,28,31,23,17,4,24,0,13,12,19,14,30] sequence that obtains behind ring shift left s time; Ps[nk mod N] expression Ps[] a nk modN numerical value in the sequence; CellID is ID number relevant with the sub-district; Nk is the s sum of k and the 13 times value after to the sub-carrier number delivery in each subchannel.
Renewal subchannel of the present invention is specially with the corresponding relation of sub carrier group: each subchannel obtains all subcarriers in the corresponding sub carrier group of this subchannel according to the relevant calculation of parameter of current OFDM notation index respectively.
The following computing formula of computing application of the present invention:
Subcarrier(k，s，S)＝N×nk+{Ps[nk?mod?N]+CellID+S}mod?N
Wherein, s is a sub-channel index; K is the sub-carrier indices of each subchannel; S is an OFDM notation index relevant parameter; (k, s S) are illustrated on the current OFDM symbol s subchannel, the subcarrier number of k subcarrier to Subcarrier; N represents subchannel number; Ps[] be to constant series P=[3,18,2,8,16,10,11,15,26,22,6,9,27,20,25,1,29,7,21,5,28,31,23,17,4,24,0,13,12,19,14,30] sequence that obtains behind ring shift left s time; Ps[nk mod N] expression Ps[] N numerical value of nk mod in the sequence; CellID is ID number relevant with the sub-district; Nk is the s sum of k and the 13 times value after to the sub-carrier number delivery in each subchannel.
OFDM notation index relevant parameter of the present invention is for being the function of variable with OFDM notation index parameter.
Integer value after the merchant that OFDM notation index relevant parameter of the present invention is OFDM notation index parameter S-index and frequency hopping step-length rounds.
Frequency hopping step-length of the present invention is any natural number greater than 1.
The method of the invention further comprises: receiving terminal and transmitting terminal upgrade the corresponding relation of subchannel and sub carrier group synchronously, and corresponding each subchannel OFDM symbol data of using corresponding sub carrier group demodulate reception to arrive.
The method of the invention further comprises: increase frequency hopping indication territory on the 0th OFDM symbol, to indicate whether to have carried out frequency hopping.
This shows, use method of the present invention and can obtain following beneficial effect: the present invention
This shows, use method of the present invention and can obtain following beneficial effect: method of the present invention is by changing the fast frequency hopping of the mapping relations realization OFDMA system between subchannel and the sub carrier group, and need in the broadcast of system, not increase the information such as frequency hop sequences relevant with frequency hopping, save interface-free resources, guaranteed the efficiency of transmission of system wireless interface; And owing to do not need to change the expense of the form of broadcast, can realize the OFDMA system of employing frequency hopping and not adopt favorable compatibility between the OFDMA system of frequency hopping.
Description of drawings
Fig. 1 is the mapping method flow chart of a kind of OFDMA system subcarrier and subchannel;
Fig. 2 is the frame structure of the OFDMA system time division duplex of agreement IEEE802.16 regulation.
Embodiment
For the purpose, technical scheme and the advantage that make invention is clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
For under the situation that does not increase OFDMA system broadcast message expense, realize the fast frequency hopping of OFDMA system, method of the present invention does not change the sub channel resource that each user uses in the same OFDMA frame, but by with the OFDMA symbol being the corresponding relation between unit change subchannel and the OFDMA sub carrier group, make each user in different symbol times, use different subcarrier transmission data, and then realize the fast frequency hopping of OFDMA system.
Method of the present invention is still used the burst packet of distributing the method transmission user of time domain-frequency two dimension Resource Block in the prior art by the OFDMA system broadcast message as the user of needs transmission data.Equally, the time domain of distribution-frequency two dimension Resource Block is by subchannel biasing, symbol biasing, number of subchannels and four parameter-definitions of symbolic number.And in a frame, for the user of Resources allocation, employed subchannel is constant.But method of the present invention is improved the mapping method of subchannel of the prior art and subcarrier.
Embodiment 1:
Referring to the OFDMA subcarrier shown in Figure 1 and the mapping method of subchannel, the preferred embodiment of the present invention 1 described method is also at first distributed pilot sub-carrier from available subcarrier, and 1536 data subcarriers that will be left renumber (step 101); Then, according to certain principle, above-mentioned 1536 data subcarriers that renumber are mapped on 32 subchannels, wherein, each subchannel comprises 48 subcarriers, but mapping relations of the present invention are (steps 102) that constantly change in the process of transmission.
In subchannel of the present invention and subcarrier mapping process, the formula (1) that uses following formula (3) to replace using in the prior art calculates:
Subcarrier(k，s，S-index)＝N×nk+{Ps[nk?mod?N]+CellID+S-index}mod?N (3)
Wherein, S-index represents the OFDMA notation index, and span is 0～OFDMA symbolic number-1;
(k, s S-index) are illustrated on S-index the OFDMA symbol s subchannel, the subcarrier number of k subcarrier to Subcarrier;
Other parameter-definitions and formula (1), (2) are identical.
Above-mentioned formula (3) has added OFDMA notation index parameter S-index in original subcarrier grouping formula (1), make that the subcarrier of each subchannel correspondence is relevant with current OFDMA notation index S-index, promptly the subcarrier of each subchannel correspondence constantly changes according to current OFDMA notation index.Therefore, by using the mapping method of above-mentioned subcarrier and subchannel, different subchannels are not overlapping at the subcarrier that same OFDMA symbol place comprises, and identical subchannel is also inequality at the subcarrier that different OFDMA symbols place comprises.That is to say, in same frame, though the subchannel that each user uses does not change, but because the mapping relations of subchannel and sub carrier group all are different for the symbol of each OFDMA, this just is equivalent to, the OFDMA symbol that each user is corresponding different uses different subcarrier transmission data, has just realized fast frequency hopping.
For example, if in this frame, the OFDMA system is 0 subchannel for user A has distributed sub-channel index.Though, in this frame, user A all uses subchannel 0 transmission data, but, calculating by formula (3) can obtain: when supposing CellID=0, at the 0th OFDMA symbol place, sub-channel index is that the subcarrier number of 48 subcarriers comprising of 0 subchannel is: 3,50,66,104,144,170,203,239,282,310,326,361,411,436,473,481,541,551,597,613,668,703,727,753,772,824,832,877,908,947,974,1022,1027,1074,1090,1128,1168,1194,1227,1263,1306,1334,1350,1385,1435,1460,1497,1505;
At the 1st OFDMA symbol place, sub-channel index is that the subcarrier number of 48 subcarriers comprising of 0 subchannel is: 18,34,72,112,138,171,207,250,278,294,329,379,404,441,449,509,519,565,581,636,671,695,721,740,792,800,845,876,915,942,990,995,1042,1058,1096,1136,1162,1195,1231,1274,1302,1318,1353,1403,1428,1465,1473,1533;
At the 2nd OFDMA symbol place, sub-channel index is that the subcarrier number of 48 subcarriers comprising of 0 subchannel is: 2,40,80,106,139,175,218,246,262,297,347,372,409,417,477,487,533,549,604,639,663,689,708,760,768,813,844,883,910,958,963,1010,1026,1064,1104,1130,1163,1199,1242,1270,1286,1321,1371,1396,1433,1441,1501,1511; ....
That is to say, the mapping method of above-mentioned subchannel and subcarrier makes user A transmit data at the 0th symbol with above-mentioned first group of subcarrier, use above-mentioned second group of subcarrier transmission data at the 1st symbol, and use above-mentioned the 3rd group of subcarrier transmission data at the 2nd symbol, ..., promptly realized fast frequency hopping.
Because receiving terminal has also used the identical subcarrier and the mapping method of subchannel, therefore, receiving terminal also can select correct sub carrier group to carry out demodulation to each subchannel according to current OFDMA notation index.Therefore, need not transmitting terminal transmission frequency hop sequences information, can not increase the broadcast overhead of system.In addition, it is same because the subchannel that same user's data is used in same frame is constant, promptly the time domain of this burst packet-frequency domain two dimension Resource Block is constant in view of logic, for example, in the above example, user A all uses sub-channel index in this frame be 0 subchannel transmission data, therefore, in the broadcast message of this Frame, still can only need given symbol biasing, the subchannel biasing, four parameters of number of symbols and subchannel number just can be determined time domain-frequency domain two dimension Resource Block that a user uses, and therefore also do not need to change the form of resource allocation message in the broadcast.
Use the mapping method of described subcarrier of the foregoing description and subchannel, can also make OFDMA system that uses frequency hopping and the OFDMA system that does not use frequency hopping compatible fully.From top analysis as can be seen, when S-index=0, the mapping relations that obtain when not using frequency hopping in mapping relations between the subchannel that calculates by formula (3) and the subcarrier and the prior art are identical, therefore, only need to increase a frequency hopping and indicate the territory at the 0th symbol place of OFDMA system broadcast message, be used to refer to and whether use frequency hopping, can realize the compatibility of frequency-hopping system and non-frequency-hopping system.For example, if the frequency hopping of the 0th symbol of OFDMA system broadcast message indication territory is designated as not frequency hopping, then in follow-up OFDMA symbol, subchannel and sub carrier group are shone upon by the method for the formula (1) of prior art, if be designated as the use frequency hopping, then in follow-up OFDMA symbol, subchannel and subcarrier use the method for formula of the present invention (3) to shine upon.And receiving terminal can be indicated the content in territory according to frequency hopping, selects correct demodulation subcarrier.
Above preferred embodiment 1 described method be with each OFDMA symbol as the unit of frequency hopping, also can set the form of the unit of frequency hopping in the actual application for any other.
Embodiment 2:
Frequency hopping for the form that realizes any other, preferred embodiment 2 is revised as other parameters that are associated with OFDMA notation index parameter S-index with the OFDMA notation index S-index that adds in the above-mentioned formula (3), be referred to as OFDMA notation index relevant parameter here, this parameter can be to be the function of variable with OFDMA notation index parameter S-index.
The described method of this embodiment makes in transmission course, and the mapping relations between subchannel and the corresponding sub carrier group constantly change according to the variation of OFDMA notation index relevant parameter, realize frequency hopping pattern arbitrarily with this.
Described method of this embodiment and embodiment 1 are basic identical, but in subchannel of the present invention and subcarrier mapping process, the formula (3) that uses following formula (4) to replace using among the embodiment 1 calculates:
Subcarrier(k，s，S)＝N×nk+{Ps[nk?mod?N]+CellID+S}mod?N (4)
Wherein, S represents OFDMA notation index relevant parameter; (k, s S) then are illustrated on the current symbol s subchannel, the subcarrier number of k subcarrier to Subcarrier; Other parameter-definitions and formula (1), (2) are identical.
For example, be that frequency hopping unit carries out if wish described frequency hopping with m OFDMA symbol, only one of the S in the formula (4) is replaced with OFDMA notation index S-index and just can realize divided by m merchant's integer value.M can be called the frequency hopping step-length here.
At this moment, calculating by formula (4) can obtain: when supposing CellID=0, at the 0th to m-1 OFDMA symbol place, sub-channel index is that the subcarrier number of the sub carrier group used of 0 subchannel is: 3,50,66,104,144,170,203,239,282,310,326,361,411,436,473,481,541,551,597,613,668,703,727,753,772,824,832,877,908,947,974,1022,1027,1074,1090,1128,1168,1194,1227,1263,1306,1334,1350,1385,1435,1460,1497,1505;
At m to the 2m-1 OFDMA symbol place, sub-channel index is that the subcarrier number of the sub carrier group used of 0 subchannel is: 18,34,72,112,138,171,207,250,278,294,329,379,404,441,449,509,519,565,581,636,671,695,721,740,792,800,845,876,915,942,990,995,1042,1058,1096,1136,1162,1195,1231,1274,1302,1318,1353,1403,1428,1465,1473,1533;
At 2m to the 3m-1 OFDMA symbol place, sub-channel index is that the subcarrier number of the sub carrier group used of 0 subchannel is: 2,40,80,106,139,175,218,246,262,297,347,372,409,417,477,487,533,549,604,639,663,689,708,760,768,813,844,883,910,958,963,1010,1026,1064,1104,1130,1163,1199,1242,1270,1286,1321,1371,1396,1433,1441,1501,1511; ....
This shows, realized that by embodiment 2 described methods with m OFDMA symbol be the frequency hopping that frequency hopping unit carries out.
Those of ordinary skill in the art are easy to expect, as long as revise in the formula (4) expression-form with OFDMA notation index relevant parameter S, just can obtain any frequency hopping pattern of wanting, and realize the frequency hopping of multiple mode.
More than lift preferred embodiment; the purpose, technical solutions and advantages of the present invention have been carried out further detailed description; institute is understood that; the above is the preferred embodiments of the present invention; not in order to show the present invention; within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1, a kind of method that in orthogonal frequency division multiple access system, realizes fast frequency hopping, wherein, each subchannel of transmitting terminal uses a sub carrier group transmission OFDM symbol; It is characterized in that, in transmission course, with the OFDM symbol is the corresponding relation that unit upgrades subchannel and sub carrier group, make that the OFDM notation index of the corresponding relation of subchannel and sub carrier group and current transmission is relevant, and each subchannel uses the sub carrier group after the renewal to transmit described OFDM symbol.
2, the method for claim 1, it is characterized in that described renewal subchannel is specially with the corresponding relation of sub carrier group: each subchannel obtains all subcarriers in the corresponding sub carrier group of this subchannel according to current OFDM notation index calculation of parameter respectively.
3, method as claimed in claim 2 is characterized in that, the following computing formula of described computing application:
Subcarrier(k，s，S-index)＝N×nk+{Ps[nkmod?N]+CellID+S-index}mod?N
Wherein, s is a sub-channel index; K is the sub-carrier indices of each subchannel; S-index is an OFDM notation index parameter; (k, s S-index) are illustrated on S-index the OFDM symbol s subchannel, the subcarrier number of k subcarrier to Subcarrier; N represents subchannel number; Ps[] be to constant series P=[3,18,2,8,16,10,11,15,26,22,6,9,27,20,25,1,29,7,21,5,28,31,23,17,4,24,0,13,12,19,14,30] sequence that obtains behind ring shift left s time; Ps[nk mod N] expression Ps[] a nk modN numerical value in the sequence; CellID is ID number relevant with the sub-district; Nk is the s sum of k and the 13 times value after to the sub-carrier number delivery in each subchannel.
4, the method for claim 1, it is characterized in that described renewal subchannel is specially with the corresponding relation of sub carrier group: each subchannel calculates all subcarriers in the corresponding sub carrier group of this subchannel according to current OFDM notation index relevant parameter respectively.
5, method as claimed in claim 4 is characterized in that, the following computing formula of described computing application:
Subcarrier(k，s，S)＝N×nk+{Ps[nkmod?N]+CellID+S}mod?N
Wherein, s is a sub-channel index; K is the sub-carrier indices of each subchannel; S is an OFDM notation index relevant parameter; (k, s S) are illustrated on the current OFDM symbol s subchannel, the subcarrier number of k subcarrier to Subcarrier; N represents subchannel number; Ps[] be to constant series P=[3,18,2,8,16,10,11,15,26,22,6,9,27,20,25,1,29,7,21,5,28,31,23,17,4,24,0,13,12,19,14,30] sequence that obtains behind ring shift left s time; Ps[nk mod N] expression Ps[] N numerical value of nk mod in the sequence; CellID is ID number relevant with the sub-district; Nk is the s sum of k and the 13 times value after to the sub-carrier number delivery in each subchannel.
As claim 4 or 5 described methods, it is characterized in that 6, described OFDM notation index relevant parameter is for being the function of variable with OFDM notation index parameter.
7, method as claimed in claim 6 is characterized in that, the integer value after the merchant that described OFDM notation index relevant parameter is OFDM notation index parameter S-index and frequency hopping step-length rounds.
8, method as claimed in claim 7 is characterized in that, described frequency hopping step-length is any natural number greater than 1.
9, the method for claim 1, it is characterized in that, described method further comprises: receiving terminal and transmitting terminal upgrade the corresponding relation of subchannel and sub carrier group synchronously, and corresponding each subchannel OFDM symbol data of using corresponding sub carrier group demodulate reception to arrive.
10, the method for claim 1 is characterized in that, described method further comprises: increase frequency hopping indication territory on the 0th OFDM symbol, to indicate whether to have carried out frequency hopping.
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| US10084627B2 (en) | 2006-07-10 | 2018-09-25 | Qualcomm Incorporated | Frequency hopping in an SC-FDMA environment |
| US7876843B2 (en) | 2007-09-27 | 2011-01-25 | Infineon Technologies Ag | Method for data transmission and communication system |
| CN102045085B (en) * | 2009-10-09 | 2014-07-02 | 大唐移动通信设备有限公司 | Sequence frequency hopping method and device based on ARNS (Aeronautical Radio Navigation Service) |
| CN101888261B (en) * | 2010-05-28 | 2013-02-27 | 北京科技大学 | Frequency hopping device and method on reconstructable channel set |
| CN102594765A (en) * | 2012-03-23 | 2012-07-18 | 清华大学深圳研究生院 | Base-band symbol mapping and demapping methods for onboard orthogonal frequency division multiplexing (OFDM) communication system |
| US9936502B2 (en) | 2013-12-18 | 2018-04-03 | Huawei Technologies Co., Ltd. | System and method for OFDMA resource management in WLAN |
| US9755795B2 (en) | 2013-12-18 | 2017-09-05 | Huawei Technologies Co., Ltd. | System and method for WLAN OFDMA design of subcarrier groups and frame format |
| EP3445110B1 (en) * | 2016-05-13 | 2021-07-21 | Huawei Technologies Co., Ltd. | Transmission resource mapping apparatus |
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| 802.16TM IEEE Standard for Local and metropolitanareanetworks-Part 16: Air Interface for Fixed BroadbandWirelessAccess Systems. IEEE.IEEE Std 802.16TM-2004. 2004 |
| 802.16TM IEEE Standard for Local and metropolitanareanetworks-Part 16: Air Interface for Fixed BroadbandWirelessAccess Systems. IEEE.IEEE Std 802.16TM-2004. 2004 * |
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