CN101060702A - Channel resource combination distribution method and equipment - Google Patents
Channel resource combination distribution method and equipment Download PDFInfo
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Abstract
用于数据传输资源指配的组合资源分配方法，用户设备和基站获知资源分配组合逻辑指示序列与给多个用户分配的信道资源的组合的对应关系；用户设备获知目前分组资源分配中传输的资源分配控制信令中所包含的用户数；基站向用户设备发送包含所有被分配资源的用户设备的用户设备识别号和指示资源分配组合的逻辑指示序列的控制信令。用户设备接收组合资源分配控制信令，确定给该用户设备组分配的资源组合以及其用户设备识别号在该组中用户设备识别号排序的序号，从而识别出基站给该用户设备分配的资源。本发明实现了给资源分配组中的每个用户设备的资源分配，用较小的信令负担完成了资源分配组中的每个用户的资源分配，避免了物理资源的浪费。
In the combined resource allocation method used for data transmission resource assignment, the user equipment and the base station learn the correspondence between the resource allocation combination logic instruction sequence and the combination of channel resources allocated to multiple users; the user equipment learns the resources transmitted in the current group resource allocation Allocate the number of users included in the control signaling; the base station sends the control signaling to the user equipment including the user equipment identification numbers of all user equipments allocated resources and the logic instruction sequence indicating the resource allocation combination. The user equipment receives the combined resource allocation control signaling, determines the resource combination allocated to the user equipment group and the serial number of the user equipment identification number in the group, so as to identify the resources allocated by the base station to the user equipment. The present invention realizes the resource allocation to each user equipment in the resource allocation group, completes the resource allocation of each user in the resource allocation group with less signaling burden, and avoids the waste of physical resources.
Description
Technical field
The present invention relates to mobile radio communications system, particularly relate to a kind of method that is used to indicate channel resource allocation in ofdm system or the Single Carrier Frequency Division Multiple Access system.
Background technology
Now, third generation partner plan (being called for short 3GPP) standardization body has set about beginning its existing system standard is carried out long-term evolution (LTE).About the discussion of LTE, OFDM (OFDM) technology will be as the down physical layer transmission technology among the LTE according at present, and single-carrier frequency division multiple access insert (being called for short SC-FDMA) will be as the upstream physical layer transmission technology among the LTE.
Be a kind of multi-carrier modulation communication technology on the OFDM technological essence, its basic principle is the data flow of a two-forty to be decomposed into several rate data streams transmit simultaneously on one group of mutually orthogonal subcarrier.The OFDM technology is because its multicarrier character has performance advantage aspect a lot.(1) significant advantage of OFDM technology is because data parallel transmission on a plurality of subcarriers respectively, and the length of the symbol on each subcarrier increases accordingly, has alleviated because channel delay brings the influence of intersymbol interference; Add protection on each symbol at interval by further giving, promptly introduce Cyclic Prefix (CP), under the situation of channel delay, can eliminate intersymbol interference (ISI) fully less than circulating prefix-length.Like this, each subcarrier has all experienced flat fading channel.(2) availability of frequency spectrum height of OFDM technology, ofdm signal are actual on frequency domain an overlapping, and this overlapping on improved the availability of frequency spectrum to a great extent.(3) ability of the anti-narrow band interference of OFDM technology and frequency selective fading is stronger.By with chnnel coding and being used in combination of interweaving, can strengthen the frequency diversity and the time diversity effect of ofdm system, thereby resist narrow band interference and frequency selective fading effectively.(4) OFDM technology modulation and demodulation can be realized by baseband I FFT/FTT conversion, and IFFT/FFT has ripe quick calculation method, can realize in dsp chip and hardware configuration easily.
It is a kind of availability of frequency spectrum height that single-carrier frequency division multiple access inserts (hereinafter to be referred as SC-FDMA), the wireless multiple access access technology that peak-to-average ratio is low, the implementation of its frequency domain is: modulation symbol carries out fast fourier transform earlier and transforms to frequency domain, carry out the subcarrier mapping then, carry out inverse-Fourier transform at last.In doing above-mentioned subcarrier map operation,, then be local formula transmission if user's data is mapped on the continuous sub-carriers.If user's data is mapped on the equally spaced subcarrier, then be distributed transmission.Data after the subcarrier mapping transform to time domain by inverse fast fourier transform.Add before data that afterwards Cyclic Prefix (hereinafter to be referred as CP) is modulated to radio frequency with the signal behind the time-domain sampling afterwards and launches.Here add CP and mainly contain two effects: the one, eliminate because the asynchronous interference between the subcarrier that causes on the frequency domain of each subscriber equipment; The 2nd, the introducing of CP can make receiver serviceability height, frequency domain equalization algorithm that complexity is low.Because SC-FDMA uses the resource distribution mode of quadrature to eliminate the interference in the sub-district, owing to the raising of frequency domain equalization algorithm to performance, the availability of frequency spectrum of SC-FDMA is very high simultaneously.Compare with traditional ofdm system of only doing the IFFT operation at transmitting terminal, the another one characteristic of SC-FDMA is owing to introduced the FFT module, reduced the peak-to-average ratio that transmits, thereby reduced requirement, can realize that high efficiency power sends with low-cost to the subscriber equipment power amplifier.The another one benefit that peak-to-average ratio is low is that the user of cell edge can have enough transmitting powers, thereby supports higher data speed, has improved the data rate of user uplink, has enlarged the covering of network to high data rate user.
In wireless communication system, in order to realize the scheduling of base stations control, the base station need be by physical control channel with the employed channel resource notifying user equipment of transfer of data, and just the channel resource that the up-downgoing transfer of data will be distributed sends to subscriber equipment by physical layer signaling.
The signaling that transmission channel resources is distributed can utilize special-purpose physical control channel to transmit, and this at that time mode needs proprietary physical control channel, and the utilance of channel is lower.Another mode is a signaling of utilizing the physical control channel of sharing (Shared Control Channel) to come transmission channel resources to distribute, utilize the assignment information of transmission channel resources in the High-Speed Shared Control Channel (HS-SCCH) and the identification serial number (UE ID) of subscriber equipment in the down high speed packet access technique (HSDPA) such as 3GPP, UE utilizes the method for coupling UE-ID to realize being retrieved as the channel resource of own assignment.
Utilize sharing physical control channel (HS-SCCH) in the 3GPP HSDPA technology comes the channel resource allocation mode of transmission user equipment can only be to the control signaling of a user device transmissions resource allocation in HS-SCCH transmission each time, in order further to improve the efficiency of transmission of control channel, can consider transmission is united in one group of user's control information, can obtain the coding gain that combined coding brings, simultaneously, when uniting the channel resource allocating information that sends the user, can reduce information redundancy, the saving signaling bit.An example is in the discussion of present LTE, a kind of control signal transmission method that divides into groups to control has been proposed, in the method the more close user of channel condition (Geometry) is divided into one group, and in shared control channel, transmits the control signaling of a plurality of users in this group.Divide timing at transfer resource, the control signaling of transmitting on the shared control channel as shown in Figure 1.
The resource of as can be seen from the figure in a shared channel, having given a plurality of user equipment allocation, a plurality of like this users' resource allocation control signaling can be carried out combined coding together, can obtain bigger coding gain, further improve the efficiency of transmission of shared control channel.
When system carries out resource allocation for the user, if after having distributed some frequency resource (or sub-carrier resources) for some users, other users' resource allocation has just had constraints, that is to say that the resource of distribution portion just can not have been distributed before release again.
The use shared channel of considering in the LTE research at present is to distribute separately for the resource allocation of each user in the grouping, the all possible method of salary distribution of each user is indicated separately, do not take into full account the correlation between the resource that each user distributes, below further analyze by considering the correlation between the user resources assignment, thereby can reduce the reason of assignation information redundancy.
If in the resource allocation control of a grouping, to each user, its possible resource allocation has the N kind, will represent with binary bits so, the bit number that needs is N
bFor:
If do not consider influencing each other between the user resources distribution, each user needs N so
bIndividual bit is indicated the resource of being distributed.If yet the possible resource allocation of first user has the N kind, distributed after the resource for first user, the number of the resource allocation that second user is possible will reduce accordingly, and the resource allocation number of third party will be still less, if therefore follow-up user also uses N
bIndividual bit is represented, just has very big redundancy, has also just brought some useless signaling burdens.
For example,, suppose in the system bandwidth for 2.5MHz that (Resource Unit RU) one has 6, and each Resource Unit has 25 subcarriers in local formula (Localized) the frequency resource unit that can distribute according to the result of study of present LTE.
Suppose in the downlink data transmission and these resources to be given 2 users, so for first user, can distribute smaller or equal to 6 Resource Units arbitrarily, therefore need shine upon the resource of indicating its distribution with the bit of 6 bits, here suppose that it has distributed among 6 RU the the 1st, the 2nd and the 4th, can indicate its Resources allocation with " 110100 " so.For second user,, so still need 6 bits to indicate that in 6 Resource Units that is several has distributed to this user if do not consider first user's resource allocation.But, having taken the the 1st, the 2nd and the 4th among 6 RU if considered first user's resource allocation, second user can only distribute among 6 RU the the 3rd, the 5th and the 6th so, therefore only needs 3 bits just can indicate.
Same for descending distributed (Distributed) resource allocation, and up local formula transmission and distributed transmission also have similar problem.
Therefore can consider to utilize influencing each other of resource allocation between grouping user, thereby further optimize the efficiency of transmission of shared control channel, reduce the signaling burden of giving the user equipment allocation resource required.
Summary of the invention
At the problems referred to above, the combined resource method of salary distribution that the purpose of this invention is to provide user in a kind of group of dividing into groups to control in the signaling, be used to reduce the signaling burden of resource allocation, to realize resource allocation with user in the group of the information bit indication grouping control of trying one's best few.
According to an aspect of of the present present invention, a kind of combined resource distribution method that is used for the assignment of base station realization data transmission resources comprises step:
A) corresponding relation that may make up of resource allocation combinational logic indicator sequence and the channel resource of distributing for a plurality of users is known in the base station;
B) base station sends the number of users that is comprised in the resource allocation control signaling of transmission in the present grouping resources distribution of signaling subscriber equipment;
C) base station receives channel quality report and the data transfer request that subscriber equipment sent;
D) user of Resources allocation in the resource allocation group and the resource of distributing for each user are determined in the base station, thereby determine the combination of resources to this resource allocation set of dispense;
E) determine that indexed resource distributes the logic indicator sequence of combination;
F) send the combination of the subscriber equipment identifier (UE ID) that comprises all subscriber equipmenies that are assigned with resource and the control signaling that indexed resource distributes the logic indicator sequence of combination to subscriber equipment.
According to a further aspect in the invention, a kind of method that is used for the assignment of subscriber equipment recognition data transfer resource comprises step:
A) subscriber equipment is known the corresponding relation that may make up of resource allocation combinational logic indicator sequence and the channel resource of distributing for a plurality of users;
B) know the number of users of the Resources allocation that comprises in the present resource allocation group;
C) to base station transmitting channel quality report and data transfer request message;
D) receive the combination that comprises subscriber equipment identifier (UE ID) of base station transmission and the control signaling that indexed resource distributes the logic indicator sequence of combination;
E) whether the UEID of oneself is arranged in the combination of subscriber equipment detection subscriber equipment identifier (UE ID), and determine the sequence number of this UE ID in UE ID combination;
F) subscriber equipment detects the logic indicator sequence that indexed resource distributes combination, determines the combination of resource allocation.
G) subscriber equipment identifies the resource of giving this user equipment allocation in the resource allocation combination according to the sequence number of its UE ID in UE ID combination.
According to another aspect of the invention, a kind of network side equipment that is used to realize that combined resource is distributed comprises chnnel coding/interweave, rate-matched, and modulation, Cyclic Prefix is added in the OFDM modulation, steering D/A conversion, radio frequency sending set, the transmitting antenna module also comprises:
A) Scheduler module, the resource that is used for definite resource allocation group and distributes for each user is also determined to the logic indicator sequence of subscriber equipment transmission and the combination of UE ID;
B) mapping table or corresponding relation algoritic module are indicated in logic indicator sequence and resource allocation combination, are used to realize knowing the corresponding relation of logic indicator sequence and resource allocation combination;
C) control information maker is used for the logic indicator sequence, and the combination of UE ID and other control information are converted to the control information form that is fit to the wireless channel transmission.
In accordance with a further aspect of the present invention, a kind of terminal equipment that is used to realize combined resource distribution identification comprises reception antenna, and Cyclic Prefix is removed in mould/number conversion, the OFDM demodulation, and demodulation is separated rate-matched and is conciliate chnnel coding/interleaving block module, also comprises:
A) control information detector module is used for determining the resource of network terminal to its distribution according to the control logic indicator sequence that comprises of signaling and the combined information of UE ID;
B) mapping table or corresponding relation algoritic module are indicated in logic indicator sequence and resource allocation combination, are used to realize knowing the corresponding relation of logic indicator sequence and resource allocation combination.
The present invention is with respect to traditional method, utilized the combination method of allocating resources to realize resource allocation to each subscriber equipment in the resource allocation group, finished the resource allocation of each user in the resource allocation group with less signaling burden, improve the utilization ratio of frequency resource, avoided the waste of physical resource.
Description of drawings
Fig. 1 is a control signalling diagram of giving a plurality of user equipment allocation resources at present in shared channel;
Fig. 2 is a base station operation process flow diagram of the present invention;
Fig. 3 is a control signalling diagram of giving a plurality of user equipment allocation resources in shared channel proposed by the invention;
Fig. 4 is each resource allocation in the indicated resource allocation of the logic indicator sequence combination and the corresponding relation schematic diagram of subscriber equipment;
Fig. 5 is a user facility operation process flow diagram of the present invention;
Fig. 6 is that the equipment drawing that grouping resources distributes is realized in the base station;
Fig. 7 is the equipment drawing that the subscriber equipment recognition resource distributes control information;
Fig. 8 is a distributed resource schematic diagram available under the 2.5MHz system bandwidth;
Fig. 9 is that the distributed resource combination distributes control signaling example schematic diagram among the embodiment;
Figure 10 is a local formula resource schematic diagram available under the 2.5MHz system bandwidth
Figure 11 is that local formula combination of resources is distributed control signaling example schematic diagram among the embodiment
Figure 12 is an example of base station transmitter hardware block diagram;
Figure 13 is an example of subscriber equipment receiver hardware block diagram;
Figure 14 is that the base station utilizes algorithm to ask schematic diagram to the corresponding relation of the combination of a plurality of user's allocation of channel resources may and logic indicator sequence;
Figure 15 is that subscriber equipment utilizes algorithm to ask the logic indicator sequence and gives the schematic diagram of corresponding relation of the combination of a plurality of user's allocation of channel resources may;
Figure 16 is an algorithm example of determining the logic indicator sequence according to the resource allocation combination;
Figure 17 is an algorithm example of determining the resource allocation combination according to the logic indicator sequence.
Embodiment
The present invention proposes a kind of combined resource distribution method that is used for the data transmission resources assignment, and has provided step and the equipment of realizing that this combined resource is distributed.
In the method that combined resource proposed by the invention is distributed, the operating procedure of base station as shown in Figure 2, its step that comprises is as follows:
At first, the corresponding relation of logic indicator sequence and resource allocation combination need be known in 202 base stations.203 determine the number of users in each resource allocation grouping and notify each user then.In the resource allocation each time to the resource allocation group, needed step has afterwards: 204 receive channel quality report and the data transfer request that subscriber equipment sends.The buffer that data transfer request comprises subscriber equipment takies situation indication informations such as (buffer status).Some system informations of 205 base stations channel quality, data transfer request and the base station of reporting according to subscriber equipment are determined the resource that subscriber equipment and each subscriber equipment distributed of Resources allocation in the resource allocation group afterwards.206 according to the definite combination of resources to this resource allocation set of dispense of the resource that each user distributed in the resource allocation group then.Afterwards 207 according to known the resource allocation combination and the corresponding relation of logic indicator sequence determine that this resource allocation makes up corresponding logic indicator sequence.Then 208 by shared channel to subscriber equipment send comprise all Resources allocation the user's and the combination of UE ID of a definite sequence and the control signaling of determined logic indicator sequence arranged.209 judge whether resource allocation process finishes afterwards, if then 210 ending resource assigning process if not, then continue to carry out 204.
Wherein 202, the base station is known resource allocation combinational logic indicator sequence and given the corresponding relation of combination of the channel resource of user equipment allocation is that each resource allocation combination in the grouping resources assign group all has a unique logic indicator sequence corresponding with it.The number of users N that comprises in the grouping resources assign group
uThe decision indexed resource is distributed the sequence length of combination, that is to say number of users specific in the grouping, just have specific sequence length.Because the number of users in the group will determine that all the possible resource allocation combined number that need indicate of this user resources assign group are N
c, and to indicate this all N
cPlant the indicator sequence length L that the resource allocation combination needs
sTo determine by following formula:
Therefore specific as can be seen number of users will have the sequence length that specific indexed resource distributes combination.
Hypothetical resource distributes RA, and (i is in i the resource allocation combination j), gives the resource of j user's distribution, and working as number of users so is N
u, its possible resource allocation combination adds up to N
cThe time, the corresponding relation that can provide resource allocation logic indicator sequence and resource allocation combination can be as shown in the table:
Table 1: number of users is N
uThe time logical resource corresponding relation that distributes indicator sequence and resource allocation to make up
| The logic indicator sequence | N
uThe resource allocation combination that individual subscriber equipment is | |||||
| Sequence | ||||||
| 1 | Distribute | |||||
| RA(1，1 ) | RA(1，2 ) | … | RA(1，j ) | … | RA(1，N u) | |
| Sequence 2 | Distribute combination 2 | |||||
| RA(2，1 ) | RA(2，2 ) | … | RA(2，j ) | … | RA(2，N u) | |
| … | … | |||||
| … | … | … | … | … | … | |
| Sequence i | Distribute combination i | |||||
| RA(i，1 ) | RA(i，2 ) | … | RA(i，j ) | … | RA(i， N u) | |
| … | … | |||||
| … | … | … | … | … | … | |
| Sequence N c | Distribute combination N c | |||||
| RA(N c，1 ) | RA(N c，2 ) | … | RA(N c，j ) | … | RA(N c，N u) | |
In above-mentioned mapping table, will only can comprise possible combination of resources, and can not comprise the combination of resources that can not exist, that is to say that the resource of distributing to different user will not have overlapping in same resource allocation combination.Concerning each minimum resource allocation unit (RU), if this RU has distributed to certain user, it will can not reallocated to the another one user so.The mode of this combination assignment can avoid the independent assigned resources of each user to distribute caused redundant indication.
In the above-mentioned mapping table, the binary bit sequence of logic indicator sequence is converted into decimal value is sequence number in the indicated possible resource allocation combination that is combined in all indications.
In addition in the system that present LTE discusses descending employing be OFDM, and that up employing is Single Carrier Frequency Division Multiple Access (SC-FDMA) because the characteristic of OFDM and SC-FDMA is different, therefore the resource that can use for each user's up-downgoing is also different.
In the SC-FDMA transmission, subscriber equipment need keep its single-carrier property, if employing is distributed (Distributed) transmission, the subcarrier that subscriber equipment distributed must be equally spaced fully so; And if local formula (Localized) is transmitted, the subcarrier that subscriber equipment distributed must be totally continuous so.These restrictions have been arranged, and in up SC-FDMA transmission, the combination of resources number that subscriber equipment may distribute in the resource allocation group will be less than descending possible resource allocation combined number.Therefore the up-downgoing in the LTE system has different above-mentioned corresponding relations.
In step 202, the base station know resource allocation combinational logic indicator sequence and the corresponding relation of the combination of the channel resource of distributing for a plurality of users method can for:
Method 1:, in base station and subscriber equipment, all store this mapping table by be fixed up logic indicator sequence and give the mapping table of the combination of a plurality of user's allocation of channel resources may of standard.
For number of users N specific in the resource allocation group
u, will have different mapping tables.For specific N
u, the stored relation table can be as shown in table 1 in base station and the subscriber equipment.
It should be noted that the logic indicator sequence and a lot of modes can be arranged for the mapping relations of corresponding relation of the combination of a plurality of user's allocation of channel resources may.For example, after all combination of resources are decided, can be with they sequence arrangement, then their sequence number being converted into length is L
sBinary bit sequence, make up pairing logic indicator sequence as this resource allocation.Same, also all combination of resources backwards can be arranged, then their sequence number being converted into length is L
sBinary bit sequence, make up pairing logic indicator sequence as this resource allocation.
To different system bandwidths, will have different logic indicator sequences and give the mapping table of the combination of a plurality of user's allocation of channel resources may.
In the up-downgoing of LTE system, will have different logic indicator sequences and give the mapping table of the combination of a plurality of user's allocation of channel resources may in addition.Because uplink will be subjected to the restriction of single carrier transmission characteristic, the element in the therefore up mapping table will be less than the element in the descending mapping table.
Method 2: by the algorithm of corresponding relation that standard is fixed up and asks the logic indicator sequence and give the combination of a plurality of user's allocation of channel resources may, this corresponding relation algorithm of storage in the base station.
This algorithm has been arranged, and the base station can be a parameter with the number of users that comprises in system bandwidth and the resource allocation combination just, is input with the different combination of resources of giving the resource allocation set of dispense, obtains the logic sequence that corresponding indexed resource distributes combination.
It should be noted that, in order to reduce the complexity that algorithm is realized, can give in the corresponding relation of the combination of resource allocation and logic indicator sequence and add some redundancies, that is to say in order to reduce to realize the complexity of the inventive method, can in the corresponding relation of the combination of resource allocation and logic indicator sequence, add the corresponding relation of some resource allocation combinations that can not exist and logic indicator sequence.
The base station is the form that subscriber equipment need be determined the control signaling that the base station sends according to this number to the reason that subscriber equipment sends the number of users that comprises in the resource allocation combination in above-mentioned steps 203, because comprise different numbers of users in the resource allocation group, control the logic sequence length of the indexed resource combination of user's number of setting (UE ID) that will have different numbers in the signaling and different length so.
In above-mentioned steps 207, described base station determines that according to the relation of the combination of resource allocation and logic indicator sequence this resource allocation makes up the method for corresponding logic indicator sequence and can have two kinds:
A kind of is the mapping table of storing resource allocation combination and logic indicator sequence in the base station, and the base station will be found out with resource allocation and make up corresponding logic indicator sequence by the mode of tabling look-up so.
Another is a mode of utilizing algorithm computation with determined resource allocation combinatorial input to determining the logic indicator sequence and giving in the algorithm of corresponding relation of combination of a plurality of user's allocation of channel resources may, obtains this resource allocation and makes up pairing logic indicator sequence.The base station utilizes algorithm to ask to the schematic diagram of the corresponding relation of the combination of a plurality of user's allocation of channel resources may and logic indicator sequence as shown in figure 14.
Because different system bandwidths, different resource allocation number of users in the resource allocation group has different possible resource allocations combinations, therefore number of users (the N that 1403 system bandwidths (BW) and 1404 resource allocations need be made up
u) as input parameter input 1401 in the algorithm of the corresponding relation of the combination of asking resource allocation and logic indicator sequence.Afterwards, i (RC is being made up in the determined resource allocation that is distributed to the resource allocation group in 1402 base stations
i) be input to and just can obtain indexed resource in 1401 and distribute 1405 logics of combination i to refer to sequence i (SQ
i).
In above-mentioned steps 208, the base station sends the combination of the subscriber equipment identifier (UE ID) that comprises all subscriber equipmenies that are assigned with resource and the control signaling that indexed resource distributes the logic indicator sequence of combination to subscriber equipment.Wherein the sequence number of each UE ID in UE ID combination is consistent in the sequence number of the combination of resource allocation with resource to its distribution, just by the order of UE ID in UE ID combination, has specified the resource allocation of resource allocation in making up.Signaling is controlled as shown in Figure 3 to the resource allocation that subscriber equipment sends in the base station.
301 for all that comprise in the combination of resources assignment signaling are assigned with the combination of UE ID of the subscriber equipment of resource among the figure, the resource that has been used to refer to the distribution of giving which subscriber equipment in this control signaling, and their allocation order.The 302 logic indicator sequences for the resource allocation combination are used to indicate the base station to give this combination of resources that resources for user equipment assign group is distributed.303 control other signalings in the signaling for this reason.
The base station is in the resource allocation control signaling that subscriber equipment sends, and the resource of distributing to each user during the indicated resource allocation of logic indicator sequence is made up and the corresponding relation of subscriber equipment are as shown in Figure 4.
402 is logic indicator sequence i among the figure, can determine corresponding resource allocation combination according to the corresponding relation of logic indicator sequence and resource allocation combination, shown in 404 among the figure.Wherein (i is that j resource allocation among the i made up in the pairing resource allocation of logic indicator sequence i j) to RA.As can be seen from the figure, the resource allocation combination just can be determined according to the resource of distributing to each subscriber equipment in the resource allocation group in the base station, and then definite indexed resource distributes the logic indicator sequence of combination, afterwards again according to the pairing user of each resource allocation in the resource allocation combination, determine the order of the UE ID in the UE ID combination in the 401 resource allocation groups in the control signaling, just can realize resource allocation each subscriber equipment in the resource allocation group.
In the method that combined resource proposed by the invention is distributed, the operating procedure of subscriber equipment as shown in Figure 5, its step that comprises is as follows:
At first, 502 subscriber equipmenies need be known the corresponding relation of logic indicator sequence and resource allocation combination, 503 number of users that will know the Resources allocation that is comprised in the resource allocation group at this subscriber equipment place then just can be determined the length of resource allocation combinational logic indicator sequence according to the bandwidth subscriber equipment of this number and system.504 subscriber equipmenies will be to base station transmitting channel quality report and data transfer request message afterwards.505 receive the combination that comprises subscriber equipment identifier (UEID) of base station transmission and the control signaling that indexed resource distributes the logic indicator sequence of combination then, after receiving this control signaling, will 506 detect the UE ID that comprises this subscriber equipment in the combination of a plurality of UE ID in the control the signaling whether base station sends.If not then carry out 510 and judge that subscriber equipment receives the control signaling and whether the resource allocation testing process finishes.If have, 507 will determine its UE ID sequence number in UE ID combination in the control signaling so.Afterwards, 508 subscriber equipmenies detect the indexed resource that control comprises in the signaling and distribute the logic indicator sequence of combination, and according to the corresponding relation that logic indicator sequence and resource allocation are made up, and determine that the base station gives the combination of resources of this resource allocation set of dispense.Then, 509 determine the resource allocation of corresponding sequence number in the resource allocation combination according to its UE ID sequence number in the UE ID combination in the control signaling.
Wherein, the operating procedure 502 of subscriber equipment, subscriber equipment know that the corresponding relation that will know described in the step 202 in the operating procedure of the corresponding relation of resource allocation combinational logic indicator sequence and the combination of the channel resource of giving user equipment allocation and base station is identical.
In step 502, subscriber equipment knows that the resource allocation combinational logic indicator sequence and the method for the corresponding relation of the combination of the channel resource of distributing for a plurality of users can be in the tabulation of subscriber device stores corresponding relation, also can be the algorithm that described corresponding relation is asked in storage in subscriber equipment.After in subscriber equipment, having stored the corresponding relation tabulation or algorithm of logic indicator sequence and the combination of the channel resource of distributing for a plurality of users, subscriber equipment just can be with detected logic indicator sequence in the base station sends control signaling, and is input in the tabulation or obtains the indicated resource allocation combination of logic indicator sequence in the algorithm.
Subscriber equipment has been known the number of users that comprises in the resource allocation combination in above-mentioned steps 503, just can determine the length of the logic indicator sequence that comprises in the control signaling that the base station sends, and then determine the form of control signaling according to the bandwidth of this number and system.
In above-mentioned steps 508, the method for the definite combination of resources to this resource allocation set of dispense of logic indicator sequence that described subscriber equipment comprises in the signaling according to control and logic indicator sequence and the corresponding relation of resource allocation combination can have two kinds:
A kind of is the mapping table of storing resource allocation combination and logic indicator sequence in the subscriber equipment, and subscriber equipment will be found out with resource allocation and make up corresponding logic indicator sequence by the mode of tabling look-up so.
To be the mode of utilizing algorithm computation be input to received logic indicator sequence in the algorithm of corresponding relation of the combination of determining to give a plurality of user's allocation of channel resources may and logic indicator sequence for another, obtains the pairing resource allocation combination of this logic indicator sequence.Subscriber equipment utilize algorithm ask the logic indicator sequence and give a plurality of user's allocation of channel resources may combination corresponding relation schematic diagram as shown in figure 15.
Equally, in order to reduce the complexity that algorithm is realized, can in the corresponding relation of the combination of resource allocation and logic indicator sequence, add the corresponding relation of some resource allocation combinations that can not exist and logic indicator sequence.
Because different system bandwidths, different resource allocation number of users in the resource allocation group has different possible resource allocations combinations, therefore number of users (the N that 1503 system bandwidths (BW) and 1504 resource allocations need be made up
u) as input parameter input 1501 in the algorithm of the corresponding relation of the combination of asking logic indicator sequence and resource allocation.Afterwards, refer to sequence i (SQ receiving the logic that the base station sends with 1502
i) just can obtain the resource allocation combination i (RC that is distributed to the resource allocation group 1505 base stations
i).
In the operating procedure that above-mentioned subscriber equipment recognition resource distributes, the method of determining resource allocation as shown in Figure 4, subscriber equipment is determined its UE ID position number in the UE ID combination in the control signaling, finds out resource allocation to this user equipment allocation by this sequence number in the indicated resource allocation combination of logic sequence then.UE ID sequence number in the UE ID combination in the control signaling of supposing this subscriber equipment is j, and it is i that detected indexed resource distributes the logic indicator sequence of combination, (i j) is resource to this user equipment allocation to j resource allocation RA among the pairing resource allocation of the logic indicator sequence i combination i so.
The present invention gives base station equipment and the subscriber equipment of realizing the combinations thereof resource allocation.The realization block diagram of base station equipment wherein, as shown in Figure 6.
Which user scheduler 601 decisions in the base station give with resource allocation, and the user who obtains resource allocation is given in decision which resource allocation.After having determined the resource allocation grouping, the base station will be according to the resource allocation number of users that comprises in the resource allocation grouping, and the combination of resources of giving the resource formation that each user distributed, call 602 logic indicator sequences and resource allocation combination indication mapping table or corresponding relation algorithm, retrieve or calculate determined resource allocation and make up corresponding logic indicator sequence.
The base station will be distributed the logic indicator sequence of combination to indexed resource and have the UE ID of particular order to make up accordingly and 603 control information makers are passed in some other control information together afterwards.603 control information makers will be the logic indicator sequence, and the combination of UE ID and other control information are converted to the control information form that is fit to the wireless channel transmission.Will pass to 604 dispensing devices to control information afterwards and send to subscriber equipment with this form.
The realization block diagram of subscriber equipment as shown in Figure 7.
Subscriber equipment at first receives the resource allocation Combination Control signaling that the base station sends by 701 receiving systems, and obtain comprising the control information of resource allocation logic indicator sequence, UE ID combination and other control signalings, and 702 control information detectors are passed in this control information by demodulation, decoding.
Afterwards, control information detector 702, at first detect the UE ID whether this subscriber equipment is arranged in the UE ID combination:
If no, then finishing this resource allocation information detects;
If have, also to determine the position number of this user equipment (UE) ID in UE ID combination.Afterwards, detect the logic indicator sequence of indexed resource combination, and call 703 logic indicator sequences and resource allocation algorithm mapping table or concern algorithm, confirm each resource allocation that the pairing resource allocation combination of this logic indicator sequence comprises.According to the sequence number of the definite UE ID in front, determine the resource allocation of corresponding sequence number in the resource allocation combination then, thereby detected the resource allocation that the base station indicates for this user.Detect the base station to after this user's the resource allocation, just can pass to this resource allocation information other data transmission or receiver module.
Embodiment
For the inventive method is described, provide the embodiment of the inventive method below.In given embodiment, system bandwidth is 2.5MHz, and the subcarrier that can be used for transfer of data has 150.According to the discussion in the present LTE, with 25 subcarriers as the elementary cell of a resource allocation (Resource Unit, RU), so for the system bandwidth of 2.5MHz can with Resource Unit be 6.
Here be example at first, provide embodiments of the invention with distributed (Distributed) resource allocation among the up SC-FDMA.For the system bandwidth of 2.5MHz, up available distributed resource units (RU) as shown in Figure 8.Wherein among each RU, include 25 subcarriers, in a RU, the minimum interval of subcarrier is 6.
Here suppose that (d k) is the distributed channel resource that can distribute to D, and wherein d is the minimum interval between this channel resource sub-carriers, and k is spaced apart sequence number in the distributed resource of d for all.For example, to be the subcarrier minimum interval be 6 the 3rd distributed resource, the just RU3 among Fig. 8 to D (6,3).
In order to guarantee the single-carrier property of user uplink transmission, (d, k) the minimum interval d between the subcarrier in must be the factor of Resource Unit (RU) sum to the distributed resource D that each user distributed.
As previously described, minimum Resource Unit is 25 subcarriers, and like this for the distributed resource in the 2.5MHz system bandwidth, maximum subcarrier spacing is 6, just d
Max=6, like this for the 2.5MHz system bandwidth, the sum of Resource Unit is 6.In addition, the single-carrier property that will guarantee Single Carrier Frequency Division Multiple Access with uplink is arranged, therefore give same user's carrier resource, must be equally spaced, so just require to distribute to each user's distributed resource D (d, k) d in must be the factor of the sum 6 of Resource Unit, so the span of d is: { 1,2,3 and 6}.In the time of so just can determining to the unique user Resources allocation the distributed resource that might distribute, as follows:
D(1，1)，D(2，1)，D(2，2)，D(3，1)，D(3，2)，D(3，3)，D(6，1)，D(6，2)，D(6，3)，D(6，4)，D(6，5)，D(6，6)
Each user one has 12 kinds of possible resource allocations, in order to represent to N
uThe combination of resources that individual user distributes can be with a N
uThe position is that the bit sequence of 1 12 bits is represented to N
uThe combination of resources that individual user distributes.This N
uThe position is 1 bit sequence, and first is that 1 bit is exactly the resource of distributing to first user for corresponding resource, and second is that the resource of 1 bit correspondence is exactly the resource of distributing to second user ..., and N
uIndividual is that the resource of 1 bit correspondence is exactly to give N
uThe resource that individual user distributes.For example, having provided one 3 in the following table is the combination of resources of distributing for 3 users of 12 bit bit sequences " 001000100010 " expression of 1.
Table 2: resource allocation combination examples
| D(1 ，1) | D(2 ，1) | D(2 ，2) | D(3 ，1) | D(3 ，2) | D(3 ，3) | D(6 ，1) | D(6 ，2) | D(6 ，3) | D(6 ，4) | D(6 ，5) | D(6 ，6) |
| 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 |
According to this bit sequence of mapping of 12, can know that resource D (2,2) has distributed to first user, resource D (6,1) has distributed to second user, and resource D (6,5) has distributed to third party.In fact some resource allocation combination i that has comprised 3 resource allocations have been pointed out in this bit of 12 mapping, and wherein RA (i, 1) is D (2,2), and RA (i, 2) is D (6,1), and RA (i, 3) is D (6,5).
Owing to might be 12 kinds for the institute of a user resource allocation, therefore can indicate its resource allocation as shown in the table with the logic knowledge sequence of 4 bits.In the table below, utilize previously described method to shine upon and represent the resource allocation combination with the bit of 12 bits.
Table 3:N
uThe mapping table of=1 o'clock logic indicator sequence and resource allocation
| The logic indicator sequence | Resource allocation (combination) |
| 0000 | 100000000000 |
| 0001 | 010000000000 |
| 0010 | 001000000000 |
| 0011 | 000100000000 |
| 0100 | 000010000000 |
| 0101 | 000001000000 |
| 0110 | 000000100000 |
| 0111 | 000000010000 |
| 1000 | 000000001000 |
| 1001 | 000000000100 |
| 1010 | 000000000010 |
| 1011 | 000000000001 |
Work as N
uGreater than 1 o'clock, can shine upon the combination of representing resource allocation with bit equally, but be not that each 12 bit mapping all is possible distribution combination, reason is the allocation elements in these 12 kinds of resource allocations, be not fully independently, have between some element and the element to comprise and involved relation.For example, D (2,1) comprises D (6,1), D (6,3) and D's (6,5).Therefore delete the indicated resource allocation combination of those bit that can not exist mappings, just can determine under the different user number, all resource allocation combinations.According to all possible distribution combined number, just can determine the bit length of required logic indicator sequence, just can provide the mapping table of logic indicator sequence and resource allocation combination afterwards successively.Provide N below respectively
uBe 2,3,4,5 and the mapping table of 6 o'clock logic indicator sequence and resource allocation combination.
Work as N
u=2 o'clock, possible altogether resource allocation combined number was 37, and the logic indicator sequence length that needs so is 6, and the corresponding relation that can provide logic indicator sequence and resource allocation combination like this is as shown in the table:
Table 4:N
uThe mapping table of=2 o'clock logic indicator sequences and resource allocation
| The logic indicator sequence | Resource allocation (combination) |
| 000000 | 011000000000 |
| 000001 | 010000010000 |
| 000010 | 010000000100 |
| 000011 | 010000000001 |
| 000100 | 001000100000 |
| 000101 | 001000001000 |
| 000110 | 001000000010 |
| 000111 | 000110000000 |
| 001000 | 000101000000 |
| 001001 | 000100010000 |
| 001010 | 000100001000 |
| 001011 | 000100000010 |
| 001100 | 000100000001 |
| 001101 | 000011000000 |
| 001110 | 000010100000 |
| 001111 | 000010001000 |
| 010000 | 000010000100 |
| 010001 | 000010000001 |
| 010010 | 000001100000 |
| 010011 | 000001010000 |
| 010100 | 000001000100 |
| 010101 | 000001000010 |
| 010110 | 000000110000 |
| 010111 | 000000101000 |
| 011000 | 000000100100 |
| 011001 | 000000100010 |
| 011010 | 000000100001 |
| 011011 | 000000011000 |
| 011100 | 000000010100 |
| 011101 | 000000010010 |
| 011110 | 000000010001 |
| 011111 | 000000001100 |
| 100000 | 000000001010 |
| 100001 | 000000001001 |
| 100010 | 000000000110 |
| 100011 | 000000000101 |
| 100100 | 000000000011 |
Work as N
u=3 o'clock, possible altogether resource allocation combined number was 51, and the logic indicator sequence length that needs so is 6, and the corresponding relation that can provide logic indicator sequence and resource allocation combination like this is as shown in the table:
Table 5:N
uThe mapping table of=3 o'clock logic indicator sequences and resource allocation
| The logic indicator sequence | Resource allocation (combination) |
| 000000 | 010000010100 |
| 000001 | 010000010001 |
| 000010 | 010000000101 |
| 000011 | 001000101000 |
| 000100 | 001000100010 |
| 000101 | 001000001010 |
| 000110 | 00011100000 |
| 000111 | 00011001000 |
| 001000 | 00110000001 |
| 001001 | 00101010000 |
| 001010 | 00101000010 |
| 001011 | 000100011000 |
| 001100 | 000100010010 |
| 001101 | 000100010001 |
| 001110 | 000100001010 |
| 001111 | 000100001001 |
| 010000 | 000100000011 |
| 010001 | 000011100000 |
| 010010 | 000011000100 |
| 010011 | 000010101000 |
| 010100 | 000010100100 |
| 010101 | 000010100001 |
| 010110 | 000010001100 |
| 010111 | 000010001001 |
| 011000 | 000010000101 |
| 011001 | 000001110000 |
| 011010 | 000001100100 |
| 011011 | 000001100010 |
| 011100 | 000001010100 |
| 011101 | 000001010010 |
| 011110 | 000001000110 |
| 011111 | 000000111000 |
| 100000 | 000000110100 |
| 100001 | 000000110010 |
| 100010 | 000000110001 |
| 100011 | 000000101100 |
| 100100 | 000000101010 |
| 100101 | 000000101001 |
| 100110 | 000000100110 |
| 100111 | 000000100101 |
| 101000 | 000000100011 |
| 101001 | 000000011100 |
| 101010 | 000000011010 |
| 101011 | 000000011001 |
| 101100 | 000000010110 |
| 101101 | 000000010101 |
| 101110 | 000000010011 |
| 101111 | 000000001110 |
| 110000 | 000000001101 |
| 110001 | 000000001011 |
| 110010 | 000000000111 |
Work as N
u=4 o'clock, possible altogether resource allocation combined number was 32, and the logic indicator sequence length that needs so is 5, and the corresponding relation that can provide logic indicator sequence and resource allocation combination like this is as shown in the table:
Table 6:N
uThe mapping table 000100001011 of=4 o'clock logic indicator sequences and resource allocation
| The logic indicator sequence | Resource allocation (combination) |
| 00000 | 010000010101 |
| 00001 | 001000101010 |
| 00010 | 000110001001 |
| 00011 | 000101010010 |
| 00100 | 000100011010 |
| 00101 | 000100011001 |
| 00110 | 00100010011 |
| 00111 | 000100001011 |
| 01000 | 000011100100 |
| 01001 | 000010101100 |
| 01010 | 000010101001 |
| 01011 | 000010100101 |
| 01100 | 000010001101 |
| 01101 | 000001110100 |
| 01110 | 000001110010 |
| 01111 | 000001100110 |
| 10000 | 000001010110 |
| 10001 | 000000111100 |
| 10010 | 000000111010 |
| 10011 | 000000111001 |
| 10100 | 000000110110 |
| 10101 | 000000110101 |
| 10110 | 000000110011 |
| 10111 | 000000101110 |
| 11000 | 000000101101 |
| 11001 | 000000101011 |
| 11010 | 000000100111 |
| 11011 | 000000011110 |
| 11100 | 000000011101 |
| 11101 | 000000011011 |
| 11110 | 000000010111 |
| 11111 | 000000001111 |
Work as N
u=5 o'clock, possible altogether resource allocation combined number was 9, and the logic indicator sequence length that needs so is 4, and the corresponding relation that can provide logic indicator sequence and resource allocation combination like this is as shown in the table:
Table 7:N
uThe mapping table of=5 o'clock logic indicator sequences and resource allocation
| The logic indicator sequence | Resource allocation (combination) |
| 0000 | 000100011011 |
| 0001 | 000010101101 |
| 0010 | 000001110101 |
| 0011 | 000000111110 |
| 0100 | 000000111101 |
| 0101 | 000000111011 |
| 0110 | 000000110111 |
| 0111 | 000000101111 |
| 1000 | 000000011111 |
Work as N
u=6 o'clock, possible altogether resource allocation combined number had only a kind, does not need the indication of logic indicator sequence, and the logic indicator sequence length that needs so is 0, and its possible resource allocation combination is as shown in the table:
Table 8:N
uPossible resource allocation combination in=6 o'clock
| The logic indicator sequence | Resource allocation (combination) |
| - | 000000111111 |
If base station and subscriber equipment have all been known above-mentioned mapping table, the base station just can utilize method of the present invention to give the user equipment allocation resource.For example: in the current a certain resource allocation group, the number of users of resource allocation is 4, and in certain resource allocation, user equipment (UE) 1 will be given in the base station, UE2, and UE3 and UE4 be Resources allocation D (6,5), D (6,3), D (3,1) and D (6,6) respectively.
With reference to the order of each resource allocation in the previous table 2, can determine to comprise D (3,1), D (6,3), the pairing bit of combination of resources of D (6,5) and D (6,6) is mapped as " 000100001011 ".
If according to the method for tabling look-up, again according in the table 6, N
uThe corresponding relation of=4 o'clock logic indicator sequences and resource allocation combination (bit mapping), base station just can determine that the 5 bit logic indicator sequences of indicating above-mentioned resource allocation to make up are " 00111 ".
If according to the method for algorithm computation, so as shown in figure 14, with the 1402 resource allocations combination of sequence " 000100001011 " as input, and with 1403 system bandwidth BW=2.5MHz and 1404 resource allocation group number of users N
u=4 as parameter, utilizes 1401 to ask the algorithm of resource allocation combination and logic indicator sequence corresponding relation just can calculate indexed resource to distribute the logic indicator sequence 1405 of combination " 000100001011 " to be " 00111 ".
Determine the order of UE ID afterwards again, because D (3,1) distributes to UE3, D (6,3) be to distribute to UE2, D (6,5) distributes to UE1, and D (6,6) be to distribute to UE4, so can determine the order of UE ID in the control signaling be: UE3, UE2, UE1 and UE4.The control signaling that like this, just can provide this resource allocation combination as shown in Figure 9.
When subscriber equipment receives this control signaling, just can solve resource allocation and indicate according to the inventive method.Here be example with UE1, before receiving the control signaling, know that the number of users of indication resource allocation in its resource allocation group is 4.UE1 receives control signaling that the base station sends as shown in Figure 9 afterwards, after the reception at first UE1 detect whether control comprise in the signaling its UE ID with and UE ID in the position of all UE ID, can find to have its UE ID and in all UE ID the 3rd.
The logic indicator sequence that detects the indexed resource distribution afterwards is " 00111 ", and UE1 will determine the combination of resources bit mapping of this logic indicator sequence indication according to the corresponding relation of logic indicator sequence and resource allocation combination.
If according to the method for tabling look-up, according in the table 6, N
uThe corresponding relation of=4 o'clock logic indicator sequences and resource allocation combination (bit mapping), base station just can determine that 5 bit logic indicator sequences are that the bit sequence of mapping of " 00111 " pairing resource allocation is " 000100001011 ".
If according to the method for algorithm computation, so as shown in figure 15, with the 1502 logic indicator sequences of sequence " 00111 " as input, and with 1503 system bandwidth BW=2.5MHz and 1504 resource allocation group number of users N
u=4 as parameter, and the bit mapping 1505 that utilizes 1501 algorithms of asking logic indicator sequence and resource allocation to make up corresponding relation just can calculate the indicated resource allocation combination of logic indicator sequence " 00111 " is " 000100001011 ".
Bit mapping " 000100001011 ", the combination of resources of its representative is D (3,1), D (6,3), D (6,5) and D (6,6).Then, because the ID of UE1 is in the 3rd in 4 ID, so UE1 just can know that the base station is D (6,5) to the resource of its distribution, thereby finished the detection of resource allocation control signaling.
Give an a kind of algorithm embodiment who comparatively simply utilizes number of combinations computational logic indicator sequence who utilizes algorithm to determine resource allocation combination and logic indicator sequence corresponding relation in the methods of the invention.In this embodiment, in resource allocation combination, only considered that certain user has been given in a resource allocation after, this resource just can not have been reallocated to other users, but does not consider may comprise the situation of another kind of resource to a resource that the user distributed.The algorithm of realizing is comparatively simple, but resource allocation combination and logic indicator sequence corresponding relation have increased some redundancies, have just increased the corresponding relation of some resource allocation combinations that can not occur and logic indicator sequence.
This algorithm is achieved as follows:
For specific system bandwidth, just can determine might resource allocation number M to each subscriber equipment institute.Therefore can be with a N
uThe combination of resource allocation is represented in the position for the long bit sequence in M position of " 1 ".For example as shown in table 2, therefore can be with a N
uThe position just can represent that for the long bit sequence in M=12 position of " 1 " system bandwidth is the combination of the resource allocation of 2.5MHz.
Being used to indicate the length of the logic sequence of resource allocation combination is L
sFor:
Wherein, C
M NuFor from the M position, selecting N
uThe position is the long bit sequence combined number in M position of " 1 ".All are selected N in the M position
uSort by its binary value from small to large for the long bit sequence in M position of " 1 " in the position, the sequence number numerical value with each sequence is converted into L then
sLong binary bit sequence is the logic indicator sequence that indexed resource distributes combination.
(N is made up according to determined resource allocation in the base station
uThe position is 1 bit sequence) determine that length is L
sThe logic indicator sequence algorithm as shown in figure 16.
According to algorithm among the figure, with the number of users N in system bandwidth (i.e. possibility resource allocation number M) and the resource allocation combination
uBe parameter, and will indicate a N of certain resource allocation combination
uThe position promptly can calculate the logic indicator sequence that indexed resource distributes combination for the long bit sequence of the M of " 1 " is input in the algorithm given among Figure 16.
For example, for the system bandwidth of 2.5MHz, M=12, as shown in table 2.Here still ask N
u=3, as the pairing logic indicator sequence of combination of resources shown in the table 2, represent that promptly 3 12 long bit sequences for " 1 " of combination of resources are " 001000100010 ".Can calculate L according to formula (2)
s=8, afterwards with M=12 and N
u=3 as parameter, and bit sequence " 001000100010 " is input in the algorithm shown in Figure 16, just can calculate indexed resource and distribute the logic indicator sequence of combination to be " 01011111 ".
Otherwise, determine indicated resource allocation combination (N when indexed resource distributes the logic indicator sequence of combination when subscriber equipment receives
uThe position be the long bit sequence in M position of " 1 ") algorithm as shown in figure 17.
Compare with the method for tabling look-up of front, the logic indicator sequence length that the algorithm that utilizes number of combinations to calculate is obtained is 8,3 bits have been Duoed than the method for front, this is because in order to simplify the algorithm of asking the logic indicator sequence, increased the combination of some resource allocations that can not exist in corresponding relation, therefore given corresponding relation has redundant.For example, as shown in table 2, utilize any one 3 12 long bit sequences of this simple algorithm to make up as a kind of resource allocation for " 1 ", can determine that indexed resource distributes the logic indicator sequence of combination, but in fact some combination is non-existent, as D (2,1) and D (3,1) can not be present in same resource allocation combination, overlapping because their indicated resources have, but the increase of information bit has brought the simplification of implementation algorithm.Therefore in realization,, can in corresponding relation, increase the resource allocation combination that can not exist in some reality and logic indicator sequence accordingly for the simplification of the algorithm of realizing determining corresponding relation.
Utilize the inventive method to indicate the distributed resource of distribution and do not consider being compared as follows shown in the table of information bit that the resource distribution mode of interactional conventional method between the user is required:
Table 9: the comparison of the required bit number of distributed resource allocation
| Number of users | The required bit number of resource allocation (bit) | |
| The inventive method | | |
| 1 | 4 | 4 |
| 2 | 6 | 8 |
| 3 | 6 | 12 |
| 4 | 5 | 16 |
| 5 | 4 | 20 |
| 6 | 0 | 24 |
The distributed resource that utilizes the inventive method indication to distribute as can be seen can reduce the required signaling burden of distributed resource allocation indication greatly.
Local formula (Localized) resource allocation among the up SC-FDMA also can utilize the inventive method to carry out resource allocation.For the system bandwidth of 2.5MHz, up available local formula Resource Unit (RU) as shown in figure 10.Wherein among each RU, include 25 subcarriers, in the whole bandwidth, one has 6 local formula RU.
Here suppose that (n k) is the local formula channel resource that can distribute to L, and wherein n is the number of the Resource Unit RU that comprises in this channel resource, and k comprises sequence number in the local formula resource of n RU for all.
For up SC-FDMA transmission, in order to guarantee the single-carrier property of user uplink transmission, (n, k) subcarrier in must be continuous to the local formula resource D that same user distributed, if the number of the interior total available resource units RU of system bandwidth is N like this
r, so the scope of getting of n for 1,2,3 ..., N
r, and for the bonding carrier characteristics, just having subcarrier must be continuous this restriction, like this for specific n and N
r, the span of k be 1,2 ..., N
r-n+1}
For the system bandwidth of 5MHz, total RU number is 6, if L (n, when k) part of representing to comprise n RU is resource, the span of n be 1,2,3,4,5,6}, the maximum of k is 6-n+1, promptly span be 1,2 ..., 6-n+1}.
For example work as n=3, so k
Max=6-3+1=4.The resource that comprises 3 RU have (RU1, RU2, RU3), (RU2, RU3, RU4), (RU3, RU4, RU5) and (RU4, RU5, RU6).Such as D (3,3) be exactly (RU3, RU4, RU5).
Because the span of n is n=1,2,3,4,5,6, and the span of k be 1,2 ..., 6-n+1}, therefore in the time of can determining to the unique user Resources allocation the local formula resource that might distribute, as follows:
L(6，1)，L(5，1)，L(5，2)，L(4，1)，L(4，2)，L(4，3)，L(3，1)，L(3，2)，L(3，3)，L(3，4)，L(2，1)，L(2，2)，L(2，3)，L(2，4)，L(2，5)，L(1，1)，L(1，2)，L(1，3)，L(1，4)，L(1，5)，L(1，6)
Can utilize length equally is that 21 bit sequence of mapping indicates possible local formula combination of resources to distribute.
The mapping table of logic indicator sequence that utilizes foregoing method can provide equally to include different resource allocation users in the resource allocation group and local formula resource allocation combination.
Owing to might be 21 kinds for the institute of a user resource allocation, therefore can indicate its resource allocation as shown in the table with the logic knowledge sequence of 5 bits.In the table below, utilize previously described method to shine upon and represent the resource allocation combination with the bit of 12 bits.
Table 10:N
uThe mapping table of=1 o'clock logic indicator sequence and resource allocation
| The logic indicator sequence | Resource allocation (combination) |
| 00000 | 100000000000000000000 |
| 00001 | 010000000000000000000 |
| 00010 | 001000000000000000000 |
| … | …… |
| 10011 | 000000000000000000010 |
| 10100 | 000000000000000000001 |
Work as N
uGreater than 1 o'clock, can shine upon the combination of representing resource allocation with bit equally, but be not that each 21 bit mapping all is possible distribution combination, reason is the allocation elements in these 21 kinds of resource allocations, be not fully independently, the involved relation that is contained in is arranged between some element and the element.Therefore delete the indicated resource allocation combination of those bit that can not exist mappings, just can determine under the different user number, all resource allocation combinations.According to all possible distribution combined number, just can determine the bit length of required logic indicator sequence, just can provide the mapping table of logic indicator sequence and resource allocation combination afterwards successively.Provide N below respectively
uBe 2,3,4,5 and the mapping table of 6 o'clock logic indicator sequence and resource allocation combination.
Work as N
u=2 o'clock, possible altogether local formula resource allocation combined number was 70, and the logic indicator sequence length that needs so is 7, and the corresponding relation that can provide logic indicator sequence and resource allocation combination like this is as shown in the table:
Table 11:N
uThe mapping table of=2 o'clock logic indicator sequences and resource allocation
| The logic indicator sequence | Resource allocation (combination) |
| 0000000 | 010000000000000000001 |
| 0000001 | 001000000000000100000 |
| … | …… |
| 1000100 | 00000000000000000101 |
| 1000101 | 00000000000000000011 |
Work as N
u=3 o'clock, possible altogether resource allocation combined number was 84, and the logic indicator sequence length that needs so is 7, and the corresponding relation that can provide logic indicator sequence and resource allocation combination like this is as shown in the table:
Table 12:N
uThe mapping table of=3 o'clock logic indicator sequences and resource allocation
| The logic indicator sequence | Resource allocation (combination) |
| 0000000 | 000100000000000000011 |
| 0000001 | 000010000000000100001 |
| … | …… |
| 1010010 | 00000000000000001011 |
| 1010011 | 00000000000000000111 |
Work as N
u=4 o'clock, possible altogether resource allocation combined number was 45, and the logic indicator sequence length that needs so is 6, and the corresponding relation that can provide logic indicator sequence and resource allocation combination like this is as shown in the table:
Table 13:N
uThe mapping table 000100001011 of=4 o'clock logic indicator sequences and resource allocation
| The logic indicator sequence | Resource allocation (combination) |
| 000000 | 00000010000000000111 |
| 000001 | 00000001000000100011 |
| … | …… |
| 001000 | 000000000010000001101 |
| … | …… |
| 101011 | 00000000000000010111 |
| 101100 | 00000000000000001111 |
Work as N
u=5 o'clock, possible altogether resource allocation combined number was 11, and the logic indicator sequence length that needs so is 4, and the corresponding relation that can provide logic indicator sequence and resource allocation combination like this is as shown in the table:
Table 14:N
uThe mapping table of=5 o'clock logic indicator sequences and resource allocation
| The logic indicator sequence | Resource allocation (combination) |
| 0000 | 000000000010000001111 |
| 0001 | 000000000010000001111 |
| 0010 | 000000000001000100111 |
| … | …… |
| 1001 | 000000000000000101111 |
| 1010 | 000000000000000011111 |
Work as N
u=6 o'clock, possible altogether resource allocation combined number had only a kind, does not need the indication of logic indicator sequence, and the logic indicator sequence length that needs so is 0, and its possible resource allocation combination is as shown in the table:
Table 15:N
uPossible resource allocation combination in=6 o'clock
| The logic indicator sequence | Resource allocation (combination) |
| - | 000000000000000111111 |
If base station and subscriber equipment have all been known above-mentioned mapping table, the base station just can utilize method of the present invention to give the user equipment allocation resource.For example: in the current a certain resource allocation group, the number of users of resource allocation is 4, and in certain resource allocation, user equipment (UE) 1 will be given in the base station, UE2, and UE3 and UE4 be Resources allocation respectively, L (1,4), L (1,3), L (2,1) and L (1,6).
With reference to the front the order of each resource allocation in the local formula resource that might distribute, can determine to comprise L (2,1), L (1,3), the pairing bit of combination of resources of L (1,4) and L (1,6) is mapped as " 00000000001000000110 ".
If according to the method for tabling look-up, again according in the table 13, N
uThe corresponding relation of=4 o'clock logic indicator sequences and resource allocation combination (bit mapping), base station just can determine that the 6 bit logic indicator sequences of indicating above-mentioned resource allocation to make up are " 001000 ".
If according to the method for algorithm computation, so as shown in figure 14, with the 1402 resource allocations combination of sequence " 00000000001000000110 " as input, and with 1403 system bandwidth BW=2.5MHz and 1404 resource allocation group number of users N
u=4 as parameter, utilizes 1401 to ask the algorithm of resource allocation combination and logic indicator sequence corresponding relation just can calculate indexed resource to distribute the logic indicator sequence 1405 of combination " 00000000001000000110 " to be " 001000 ".
Determine the order of UE ID afterwards again, because L (2,1) distributes to UE3, L (1,3) be to distribute to UE2, L (1,4) distributes to UE1, and L (1,6) be to distribute to UE4, so can determine the order of UE ID in the control signaling be: UE3, UE2, UE1 and UE4.The control signaling that like this, just can provide this resource allocation combination as shown in figure 11.
When subscriber equipment receives this control signaling, just can solve resource allocation and indicate according to the inventive method.Here be example with UE1, before receiving the control signaling, know that the number of users of indication resource allocation in its resource allocation group is 4.UE1 receives control signaling that the base station sends as shown in figure 11 afterwards, after the reception at first UE1 detect whether control comprise in the signaling its UE ID with and UE ID in the position of all UE ID, can find to have its UE ID and in all UE ID the 3rd.
The logic indicator sequence that detects the indexed resource distribution afterwards is " 01000 ", and UE1 will determine the combination of resources bit mapping of this logic indicator sequence indication according to the corresponding relation of logic indicator sequence and resource allocation combination.
If according to the method for tabling look-up, according in the table 13, N
uThe corresponding relation of=4 o'clock logic indicator sequences and resource allocation combination (bit mapping), base station just can determine that 5 bit logic indicator sequences are that the bit sequence of mapping of " 01000 " pairing resource allocation is " 00000000001000000110 ".
If according to the method for algorithm computation, so as shown in figure 15, with the 1502 logic indicator sequences of sequence " 01000 " as input, and with 1503 system bandwidth BW=2.5MHz and 1504 resource allocation group number of users N
u=4 as parameter, and the bit mapping 1505 that utilizes 1501 algorithms of asking logic indicator sequence and resource allocation to make up corresponding relation just can calculate the indicated resource allocation combination of logic indicator sequence " 01000 " is " 00000000001000000110 ".
Bit mapping " 00000000001000000110 ", the combination of resources of its representative is L (2,1), L (1,3), L (1,4) and L (1,6).Then, because the ID of UE1 is in the 3rd in 4 ID, so UE1 just can know that the base station is L (1,4) to the resource of its distribution, thereby finished the detection of resource allocation control signaling.
Utilize the inventive method to indicate the local formula resource of distribution and do not consider shown in the comparison following table of the information bit that the resource distribution mode of interactional conventional method between the user is required:
Table 16: the comparison of the required bit number of distributed resource allocation
| Number of users | The required bit number of resource allocation (bit) | |
| The inventive method | | |
| 1 | 5 | 5 |
| 2 | 7 | 10 |
| 3 | 7 | 15 |
| 4 | 6 | 20 |
| 5 | 4 | 25 |
| 6 | 0 | 30 |
The distributed resource that utilizes the inventive method indication to distribute as can be seen can reduce the required signaling burden of local formula resource allocation indication greatly.
Provide the base station transmitter hardware that utilizes the inventive method to realize that grouping resources distributes among Figure 12 and realized an example of block diagram.
The scheduler 1201 of base station is determined resource allocation group and the resource of distributing for each user.Call 1202 logic indicator sequences and resource allocation combination indication mapping table or corresponding relation algorithm according to the resource allocation combination, retrieve or calculate determined resource allocation and make up corresponding logic indicator sequence.The base station will be distributed the logic indicator sequence of combination to indexed resource and have the UE ID of particular order to make up accordingly and 1203 control information makers are passed in some other control information together afterwards.The control information maker will be the logic indicator sequence, and the combination of UE ID and other control information are converted to the control information form that is fit to the wireless channel transmission.Will pass to dispensing device to control information afterwards and send to subscriber equipment with this form.The module that dispensing device comprises has: 1204 chnnel codings/interweave, and 1205 rate-matched, 1206 modulation, 1207 OFDM modulation, 1208 add Cyclic Prefix, 1209 steering D/A conversions, 1210 radio frequency sending sets, 1211 transmitting antennas.
Provide the subscriber equipment receiver hardware that utilizes the inventive method to realize that grouping resources distributes among Figure 13 and realized an example of block diagram.
Subscriber equipment is at first by comprising: 1301 reception antennas, 1302 moulds/number conversion, 1304 remove Cyclic Prefix, 1305 OFDM demodulation, 1306 demodulation, 1307 separate the receiving system that rate-matched and 1308 separates chnnel coding/interleaving block detects the resource allocation Combination Control signaling that the base station sends, and obtains the control information of resource allocation logic indicator sequence, UE ID combination and other control signalings, and 1309 control information detectors are passed in control information.
Afterwards, control information detector 1309, at first detect the UE ID whether this subscriber equipment is arranged in the UE ID combination:
If no, then finishing this resource allocation information detects;
If have, also to determine the position number of this user equipment (UE) ID in UE ID combination.Afterwards, detect the logic indicator sequence of indexed resource combination, and call 1310 logic indicator sequences and resource allocation algorithm mapping table or concern algorithm, confirm each resource allocation that the pairing resource allocation combination of this logic indicator sequence comprises.According to the sequence number of the definite UE ID in front, determine the resource allocation of corresponding sequence number in the resource allocation combination then, thereby detected the resource allocation that the base station indicates for this user.Detect the base station to after this user's the resource allocation, just can pass to this resource allocation information other data transmission or receiver module.
Claims (22)
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