CN102469604A - Method and device for distributing resource - Google Patents
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- CN102469604A CN102469604A CN2010105434846A CN201010543484A CN102469604A CN 102469604 A CN102469604 A CN 102469604A CN 2010105434846 A CN2010105434846 A CN 2010105434846A CN 201010543484 A CN201010543484 A CN 201010543484A CN 102469604 A CN102469604 A CN 102469604A
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Abstract
The embodiment of the invention provides a method for distributing a resource. The method comprises the following steps of: configuring a transmission bandwidth and a sub-frame of an SRS (Sounding Reference Signal) for a terminal by a network device; distributing an SRS transmission resource to the terminal by the network device according to a preset resource distributing sequence, wherein the preset resource distributing sequence has a preferential distributing sequence from a time domain resource to a frequency domain resource, an add-even subcarrier and a code domain resource in turn while a multi-dimensional resource is distributed; and informing the terminal of the SRS transmission resource distributed to the terminal by the network device. The embodiment of the invention also provides the network device. According to the scheme provided by the invention, the resource which has major influence on a system performance is preferentially distributed, so that the purposes of reducing interference among users and increasing the system performance are achieved. Besides, according to the scheme provided by the invention, the change in a present system is small, the compatibility of the system is free from being influenced, and the realization is simple and high-efficient.
Description
Technical field
The present invention relates to moving communicating field, particularly, the present invention relates to the method and apparatus of resource allocation.
Background technology
Present mobile communication more and more trends towards providing the multimedia service of high rate data transmission, and 3G technology has become the main research field of present mobile communication.3GPP (3rd Generation Partnership Project, third generation partner program) is devoted to the evolution as the 3G system with LTE (Long Term Evolution, Long Term Evolution) system.LTE-A (Long Term Evolution-Advanced, Long Term Evolution is senior) is the follow-up evolution of LTE technology, is commonly called as 3.9G.LTE (Long Term Evolution, Long Term Evolution) compares with 4G, and except that maximum bandwidth, two indexs of up peak rate required a little less than 4G, the other technologies index had all reached the requirement of 4G standard.
In said system, introduced SRS (Sounding reference signal, Sounding reference signal) in the system.The main application of SRS signal is to make network side can obtain UE (User Equipment as ascending channel detecting; Subscriber equipment) up CQI (Channel Quality Indicator; CQI) information and downlink forming information; The basic problem of up Sounding reference signal design research is exactly to select suitable UE in certain bandwidth range, to send SRS with a kind of reasonably cycle, guarantees accuracy that CQI estimates and the accuracy of the downlink forming information that obtains based on this SRS with the Resources Consumption of minimum.
The SRS transfer bandwidth can be configured to PUSCH (Physical Uplink Shared Channel; Physical Uplink Shared Channel) carries out the bandwidth of frequency domain dispatching; Also can carry out Sounding to the part bandwidth that PUSCH carries out frequency domain dispatching, the resource location of SRS is as shown in Figure 1, wherein; Transverse axis is the time, and the longitudinal axis is a frequency.
In order to support SRS band width configuration comparatively flexibly; And reduce signaling consumption, the SRS bandwidth should not be a fixing value as far as possible, and bandwidth should be PRB (Physical Resource Block; Physical Resource Block) integral multiple, and need reduce the number of option as far as possible.Band width configuration structure below having confirmed after repeated discussions is that 100 PRB are example with bandwidth, and configuration parameter is as shown in table 1:
Table 1 80＜
M in≤110 o'clock upstream bandwidths
SRS, bAndN
b, b=0,1,2,3 value.
Listed pairing code tree structure under different SRS band width configuration in the table 1, UE depends on B with which kind of bandwidth for transmission
SRSValue, same, according to B
SRSValue just can obtain UE and need how many times could accomplish the frequency hopping on whole frequency hopping bandwidth transmission, thereby also can obtain the transmission cycle of SRS.For example, under the 20M bandwidth situation, up have 100 PRB, and the shared PRB number of PUSCH is 96, then can get the situation of SRS band width configuration 0 and 1, if select band width configuration 1, and SRS frequency hopping bandwidth is B
SRS=1, promptly UE need be Sounding to obtain the estimation to up channel on 48 PRB, and UE single SRS transmission bandwidth is B
SRS=3; Be that UE is Sounding at every turn on 4 PRB; Then need the Sounding that could accomplish whole frequency hopping bandwidth for 48/4=12 time, that is to say needs 12 ability to accomplish the Sounding to whole frequency hopping bandwidth in the time of defined, thus the cycle that just can calculate transmitting SRS.
For TDD, SRS only transmits on sub-frame of uplink that has disposed and UpPTS.Table 2 is an example of configuration.
The sub-frame configuration of the table 2TDD SRS of system
, the sub-frame configuration of SRS just can know SRS need send after confirming on which time-domain position.Thereby can plan the time-domain position of SRS, make all users can on identical time domain and frequency domain position, not clash.The SRS sub-frame configuration is the maximum UE number to support in the sub-district; The cycle of SRS calculates; On full bandwidth, send SRS according to each UE and calculate, this is because SRS cycle and transmission bandwidth are proportional relations, if transmission bandwidth diminishes; Then the cycle of SRS also need diminish, and could accomplish the Sounding process to whole frequency hopping bandwidth at the appointed time.According to the comb=2 of 36.211 it is stipulated in the agreement that transmission, so the cycshift (circulation skew)=8 of sign indicating number on the territory is if SRS sends with full bandwidth; The user's number that then can hold at the same time is 16, if the maximum UE number of then supporting in the sub-district is 1000, and 1000/16=62.5 then; If the cycle of SRS is 100ms; Then in the radio frames of a 10ms, need 6.25 upward position and pass SRS, then round up, obtaining sub-frame configuration is 7.
The frequency comb parameter of UE " Transmission comb " is used for confirming that this UE carries out the SRS transmission on transmission or even subcarriers on the odd subcarriers;
N
CS_usable_maxFor the maximum code of current area support is divided number;
According to known frequency domain, time domain, sign indicating number territory and transmission comb resource, can distribute these resources, make different user can not clash at same resource location.This also is the thing that RRM RRM algorithm need be handled when the SRS resource allocation, to the distribution of frequency domain, time domain, sign indicating number territory and transmission comb resource.
Yet current SRS resource allocation is most only to be considered the resource of different user is separated, and does not consider whether the different resources allocation algorithm exerts an influence to performance.Because the resource allocation of SRS is the distribution of multidimensional resource, so the different resources allocation order also can exert an influence for properties of product.Especially under the state that number of users does not reach capacity in system, this influence will be very obvious.
Therefore, be necessary to propose a kind of otherwise effective technique scheme, optimize the SRS resource allocation, reach the purpose that reduces inter-user interference, elevator system performance.
Summary of the invention
The object of the invention is intended to solve at least one of above-mentioned technological deficiency; When distributing the SRS resource; The characteristic of and multidimensional resource excellent according to system performance, priority allocation be to the bigger resource of systematic function influence, thereby realize reducing the purpose of inter-user interference, elevator system performance.
In order to achieve the above object, embodiments of the invention have proposed a kind of method of resource allocation on the one hand, may further comprise the steps:
Network equipment is transmission bandwidth and the subframe of terminal configuration SRS;
Said network equipment is said terminal distribution SRS transfer resource with predetermined resource allocation in proper order; Said predetermined resource allocation comprises in proper order: when distributing the multidimensional resource, priority allocation is followed successively by time-domain resource, frequency domain resource, odd even subcarrier and sign indicating number territory resource in proper order.
Said network equipment will be distributed to the SRS transfer resource at said terminal and notify said terminal.
Embodiments of the invention have proposed a kind of network equipment on the other hand, comprise configuration module and sending module,
Said configuration module; Be used to transmission bandwidth and the subframe of terminal configuration SRS; And be said terminal distribution SRS transfer resource in proper order with predetermined resource allocation; Said predetermined resource allocation comprises in proper order: when distributing the multidimensional resource, priority allocation is followed successively by time-domain position, frequency domain position, odd even subcarrier and cyclic shift in proper order;
Said sending module is used for notifying said terminal with the SRS transfer resource of distributing to said terminal.
The such scheme that the present invention proposes influences bigger resource through priority allocation to systematic function, thereby realizes reducing the purpose of inter-user interference, elevator system performance.Avoid the user is distributed on the identical time-domain resource; Disturb between the sign indicating number territory resource on effectively reducing at the same time, transmission comb resource, frequency domain resource different user; And can effectively reduce the operand on the dsp processor on the same time point, effective elevator system performance.In addition, the such scheme that the present invention proposes, very little to the change of existing system, can not influence the compatibility of system, and realize simple, efficient.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize through practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously with easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
The time-frequency position distribution sketch map of Sounding reference signal when Fig. 1 is 25 PRB for system bandwidth;
Fig. 2 distributes sketch map for existing resources;
Fig. 3 is the method flow diagram of embodiment of the invention resource allocation;
Fig. 4 is the sketch map of embodiment of the invention resource allocation;
Fig. 5 is the sketch map of embodiment of the invention resource allocation search procedure;
Fig. 6 is the structural representation of embodiment of the invention network equipment.
Embodiment
Describe embodiments of the invention below in detail, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, only be used to explain the present invention, and can not be interpreted as limitation of the present invention.
Usually, the main contents of SRS resource allocation are frequency domain, time domain, sign indicating number territory and transmission comb resource.With the 20M bandwidth is example; If PUSCH can with the PRB number be 80; And the frequency hopping bandwidth of SRS is 80 PRB, and then Fig. 2 can explain the shared resource distribution situation of SRS transmission of different UEs, and the SRS transmission cycle of all UE is identical; Transmission bandwidth is also identical, and existing resources is distributed as shown in Figure 2.Wherein, transverse axis is the PRB axle, and the longitudinal axis is a time shaft, available ascending time slot position of the width means of each grid.In the SRS resource allocation, minimum partition size is 4 PRB, and each grid represent 4 PRB in figure below, is under 2 the situation in band width configuration, desirable 80 PRB of frequency hopping bandwidth maximum.The current resource allocation algorithm is at first distributing same resource on same time domain and frequency domain position; Distinguish with different orthogonal codes sequence or odd even subcarrier; As shown in Figure 2; UE1, UE2 and UE3 will be distributed on same time domain and the frequency domain position, and the interference between the UE that causes like this is very large.And above-mentioned resource allocation methods also can increase the operand on the dsp processor on the same time point, reduces the performance of system.
In order to realize the present invention's purpose, the embodiment of the invention has proposed a kind of method of resource allocation, may further comprise the steps: network equipment is transmission bandwidth and the subframe of terminal configuration SRS; Said network equipment is said terminal distribution SRS transfer resource with predetermined resource allocation in proper order; Said predetermined resource allocation comprises in proper order: when distributing the multidimensional resource, priority allocation is followed successively by time-domain resource, frequency domain resource, odd even subcarrier and sign indicating number territory resource in proper order; Said network equipment will be distributed to the SRS transfer resource at said terminal and notify said terminal.
In an embodiment of the present invention, network equipment includes but not limited to base station equipment.
As shown in Figure 3, the method flow diagram for embodiment of the invention resource allocation may further comprise the steps:
S110: network equipment is transmission bandwidth and the subframe of terminal configuration SRS.
In step S110, network equipment at first can be transmission bandwidth and the subframe of terminal configuration SRS.After SRS transmission bandwidth configuration and SRS sub-frame configuration are confirmed, next need further to confirm the scope that SRS time-domain position, frequency domain position etc. can values.
S120: network equipment is a terminal distribution SRS transfer resource with predetermined resource allocation in proper order.
In step S120; Network equipment is a terminal distribution SRS transfer resource with predetermined resource allocation in proper order; Particularly, predetermined resource allocation comprises in proper order: when distributing the multidimensional resource, priority allocation is followed successively by time-domain resource, frequency domain resource, odd even subcarrier and sign indicating number territory resource in proper order.
Can know through analysis before, when adding the optimized distribution resource at random or not, increase inter-system interference and the burden that increases system easily.Therefore, the scheme of the present invention's proposition is the optimize allocation of resources order.
As the embodiment of the invention, the multidimensional resource comprises:
I
SRS, the configuration index that the frame number of the time domain of SRS and subframe numbers calculate;
n
RRC, the frequency domain position of SRS;
k
TC, the odd even subcarrier;
The index of
cyclically shifted sequences.
Therefore, network equipment is preferably the different I of terminal distribution
SRS, make the SRS transfer resource at terminal on time-domain position, separate.
If can be on time domain separate users; Then can avoid the user is distributed on the identical time-domain resource; Disturb between the sign indicating number territory resource on effectively reducing at the same time, transmission comb resource, frequency domain resource different user; And can effectively reduce the operand on the dsp processor on the same time point, effective elevator system performance.
As embodiments of the invention, when network equipment can't be the different I of terminal distribution
SRSThe time, network equipment is the different n of terminal distribution
RRC, make the SRS transfer resource at terminal on frequency domain position, separate.
As embodiments of the invention, when network equipment can't be the different n of terminal distribution
RRCThe time, network equipment is the different k of terminal distribution
TC, make the SRS transfer resource at terminal be positioned at different subcarriers.
As embodiments of the invention, when network equipment can't be the different k of terminal distribution
TCThe time, network equipment is that terminal distribution is different
Make the SRS transfer resource at terminal have different cyclic shift sign indicating numbers.
Therefore, when distributing the SRS resource, should pay the utmost attention on time-domain position with user's fork, if all time-domain positions are all finished using in one-period; Then begin to distribute frequency domain resource; As shown in Figure 4, available time-domain position has only two, after UE3 arrives; Will be multiplexing on time domain with UE1, but on frequency domain position, will preferentially diverge.When all time-domain positions and frequency domain position all assign, then need consider the distribution of odd and even number subcarrier, with resource on the odd number even subcarriers separately, the sign indicating number territory resource of the cyclic shift of reallocating at last.Allocation order is following:
The SRS resource allocation order that the present invention proposes is greatly improved on systematic function than current order assignment SRS resource according to this order assignment resource.
Generally speaking; The scheme that the present invention proposes is exactly under the certain situation of current SRS frequency hopping bandwidth, SRS transmission bandwidth and SRS transmission cycle, finds one group of index combination
of satisfying the SRS resource requirement of current UE
Take all factors into consideration the factors such as processing complexity, resource overhead, SRS jamming performance of receiving terminal, the index combination is set when seeking resource
In the search order of each element be followed successively by
Promptly keep earlier
k
TC, n
RRCConstant, travel through all available I
SRSIf do not find, then keep
k
TCConstant, get current B
SRSFirst I in the reserved resource set
SRS, travel through all available n then
RRC, the rest may be inferred, and concrete search procedure sketch map is as shown in Figure 5.
S130: network equipment will be distributed to the SRS transfer resource notice terminal at terminal.
Thereafter, network equipment is provided with index combination
notice terminal with the corresponding resource in terminal.
The embodiment of the invention has also proposed a kind of network equipment 200 on the other hand, and is as shown in Figure 6, comprises configuration module 210 and sending module 220.
Wherein, Configuration module 210 is used to transmission bandwidth and the subframe of terminal configuration SRS; And be terminal distribution SRS transfer resource in proper order with predetermined resource allocation; Predetermined resource allocation comprises in proper order: when distributing the multidimensional resource, priority allocation is followed successively by time-domain position, frequency domain position, odd even subcarrier and cyclic shift in proper order.
Sending module 220 is used for the SRS transfer resource notice terminal of distributing to the terminal.
Can know through analysis before, when adding the optimized distribution resource at random or not, increase inter-system interference and the burden that increases system easily.Therefore, the scheme of the present invention's proposition is the optimize allocation of resources order.
As the embodiment of the invention, the multidimensional resource that configuration module 210 is handled comprises:
I
SRS, the configuration index that the frame number of the time domain of SRS and subframe numbers calculate;
n
RRC, the frequency domain position of SRS;
k
TC, the odd even subcarrier;
The index of
cyclically shifted sequences.
Therefore, configuration module 210 is preferably the different I of terminal distribution
SRS, make the SRS transfer resource at terminal on time-domain position, separate.
If can be on time domain separate users; Then can avoid the user is distributed on the identical time-domain resource; Disturb between the sign indicating number territory resource on effectively reducing at the same time, transmission comb resource, frequency domain resource different user; And can effectively reduce the operand on the dsp processor on the same time point, effective elevator system performance.
As embodiments of the invention, when configuration module 210 can't be the different I of terminal distribution
SRSThe time, configuration module 210 is the different n of terminal distribution
RRC, make the SRS transfer resource at terminal on frequency domain position, separate.
As embodiments of the invention, when configuration module 210 can't be the different n of terminal distribution
RRCThe time, configuration module 210 is the different k of terminal distribution
TC, make the SRS transfer resource at terminal be positioned at different subcarriers.
As embodiments of the invention, when configuration module 210 can't be the different k of terminal distribution
TCThe time, configuration module 210 is that terminal distribution is different
Make the SRS transfer resource at terminal have different cyclic shift sign indicating numbers.
Therefore, when distributing the SRS resource, should pay the utmost attention on time-domain position with user's fork, if all time-domain positions are all finished using in one-period; Then begin to distribute frequency domain resource; As shown in Figure 4, available time-domain position has only two, after UE3 arrives; Will be multiplexing on time domain with UE1, but on frequency domain position, will preferentially diverge.When all time-domain positions and frequency domain position all assign, then need consider the distribution of odd and even number subcarrier, with resource on the odd number even subcarriers separately, the sign indicating number territory resource of the cyclic shift of reallocating at last.Allocation order is following:
The SRS resource allocation apparatus that the present invention proposes is greatly improved on systematic function than current order assignment SRS resource according to this order assignment resource.
Generally speaking; The said equipment that the present invention proposes is exactly under the certain situation of current SRS frequency hopping bandwidth, SRS transmission bandwidth and SRS transmission cycle, finds one group of index combination
of satisfying the SRS resource requirement of current UE
Take all factors into consideration the factors such as processing complexity, resource overhead, SRS jamming performance of receiving terminal, the index combination is set when seeking resource
In the search order of each element be followed successively by
Promptly keep earlier
k
TC, n
RRCConstant, travel through all available I
SRSIf do not find, then keep
k
TCConstant, get current B
SRSFirst I in the reserved resource set
SRS, travel through all available n then
RRC, the rest may be inferred, and the concrete search procedure sketch map of configuration module 210 is as shown in Figure 5.
Thereafter, sending module 220 will be distributed to the SRS transfer resource notice terminal at terminal.
In the embodiment of above-mentioned network equipment, network equipment includes but not limited to base station equipment.
In the process of SRS resource allocation; Because the multidimensional characteristic of resource; Need be in a plurality of resource collections of odd even subcarrier on time domain, frequency domain, sign indicating number territory and the frequency domain Resources allocation, the order of Resources allocation also has very big influence to systematic function, scheme disclosed by the invention is through confirming the order of resource allocation in the SRS resource allocation process; Come Resources allocation, help improving systematic function according to time domain → frequency domain → odd even subcarrier → sign indicating number territory.
Said method or equipment that the present invention proposes have following one or more advantage:
Avoid the user is distributed on the identical time-domain resource, disturb between the sign indicating number territory resource on effectively reducing at the same time, transmission comb resource, frequency domain resource different user; Can effectively reduce the operand on the dsp processor on the same time point, effectively the elevator system performance; Change to existing system is very little, can not influence the compatibility of system, and realizes simple, efficient.
Those skilled in the art are appreciated that and realize that all or part of step that the foregoing description method is carried is to instruct relevant hardware to accomplish through program; Described program can be stored in a kind of computer-readable recording medium; This program comprises one of step or its combination of method embodiment when carrying out.
In addition, each functional unit in each embodiment of the present invention can be integrated in the processing module, also can be that the independent physics in each unit exists, and also can be integrated in the module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If said integrated module realizes with the form of software function module and during as independently production marketing or use, also can be stored in the computer read/write memory medium.
The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (12)
1. the method for a resource allocation is characterized in that, may further comprise the steps:
Network equipment is transmission bandwidth and the subframe of terminal configuration SRS;
Said network equipment is said terminal distribution SRS transfer resource with predetermined resource allocation in proper order; Said predetermined resource allocation comprises in proper order: when distributing the multidimensional resource, priority allocation is followed successively by time-domain resource, frequency domain resource, odd even subcarrier and sign indicating number territory resource in proper order;
Said network equipment will be distributed to the SRS transfer resource at said terminal and notify said terminal.
2. the method for claim 1 is characterized in that, said multidimensional resource comprises:
I
SRS, the configuration index that the frame number of the time domain of SRS and subframe numbers calculate;
n
RRC, the frequency domain position of SRS;
k
TC, the odd even subcarrier;
The index of
cyclically shifted sequences.
3. method as claimed in claim 2 is characterized in that, said network equipment is the different I of said terminal distribution
SRS, make the SRS transfer resource at said terminal on time-domain position, separate.
4. method as claimed in claim 3 is characterized in that, when said network equipment can't be the different I of said terminal distribution
SRSThe time, said network equipment is the different n of said terminal distribution
RRC, make the SRS transfer resource at said terminal on frequency domain position, separate.
5. method as claimed in claim 4 is characterized in that, when said network equipment can't be the different n of said terminal distribution
RRCThe time, said network equipment is the different k of said terminal distribution
TC, make the SRS transfer resource at said terminal be positioned at different subcarriers.
6. method as claimed in claim 5 is characterized in that, when said network equipment can't be the different k of said terminal distribution
TCThe time, said network equipment is that said terminal distribution is different
Make the SRS transfer resource at said terminal have different cyclic shift sign indicating numbers.
7. a network equipment is characterized in that, comprises configuration module and sending module,
Said configuration module; Be used to transmission bandwidth and the subframe of terminal configuration SRS; And be said terminal distribution SRS transfer resource in proper order with predetermined resource allocation; Said predetermined resource allocation comprises in proper order: when distributing the multidimensional resource, priority allocation is followed successively by time-domain resource, frequency domain resource, odd even subcarrier and sign indicating number territory resource in proper order;
Said sending module is used for notifying said terminal with the SRS transfer resource of distributing to said terminal.
8. network equipment as claimed in claim 7 is characterized in that, the said multidimensional resource that said configuration module distributes comprises:
I
SRS, the configuration index that the frame number of the time domain of SRS and subframe numbers calculate;
n
RRC, the frequency domain position of SRS;
k
TC, the odd even subcarrier;
The index of
cyclically shifted sequences.
9. network equipment as claimed in claim 8 is characterized in that, said configuration module is the different I of said terminal distribution
SRS, make the SRS transfer resource at said terminal on time-domain position, separate.
10. network equipment as claimed in claim 9 is characterized in that, when said configuration module can't be the different I of said terminal distribution
SRSThe time, said configuration module is the different n of said terminal distribution
RRC, make the SRS transfer resource at said terminal on frequency domain position, separate.
11. network equipment as claimed in claim 10 is characterized in that, when said configuration module can't be the different n of said terminal distribution
RRCThe time, said configuration module is the different k of said terminal distribution
TC, make the SRS transfer resource at said terminal be positioned at different subcarriers.
12. network equipment as claimed in claim 11 is characterized in that, when said configuration module can't be the different k of said terminal distribution
TCThe time, said configuration module is that said terminal distribution is different
Make the SRS transfer resource at said terminal have different cyclic shift sign indicating numbers.
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