CN102595468B - For sending resource allocation methods and the device of detection reference signal - Google Patents

For sending resource allocation methods and the device of detection reference signal Download PDF

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Publication number
CN102595468B
CN102595468B CN201110008916.8A CN201110008916A CN102595468B CN 102595468 B CN102595468 B CN 102595468B CN 201110008916 A CN201110008916 A CN 201110008916A CN 102595468 B CN102595468 B CN 102595468B
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user
frequency deviation
group
thresholding
base station
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CN102595468A (en
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余秋星
刘�东
陈琼
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Rudong Wenyuan investment and Development Co., Ltd
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties

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Abstract

The invention provides a kind of resource allocation methods for sending detection reference signal and device.Wherein, the method comprises: the frequency deviation of the user in base station measurement community; Dividing into groups to the user in community according to the frequency deviation measured in this base station, makes the frequency deviation difference in each group between user be less than set point; SRS resource distribution is carried out to each user's group after grouping in this base station.According to the present invention, solve the problem that multiple user causes because frequency deviation differs greatly the certainty of measurement of detection reference signal to decline, and then improve the throughput of system.

Description

For sending resource allocation methods and the device of detection reference signal
Technical field
Invention belongs to wireless communication technology field, particularly relates to a kind of resource allocation methods for sending detection reference signal and device.
Background technology
LTE (Long Term Evolution, Long Term Evolution) in system, user terminal can send detection reference signal (Sounding Reference Signal, SRS) in up link, and such detection reference signal can be used by base station.The uplink signal-channel quality of different frequency bands between one or more transceiver channel, according to the detection reference signal received, is measured in base station; Then the scheduler of base station is according to the uplink signal-channel quality measured, and in conjunction with dispatching principle, distributes corresponding running time-frequency resource to each user terminal in community, to carry out business transmission.
Detection reference signal also can be used by base station, is used for the timing of estimating received signal, and network uses the reception of estimation timing to regulate the transmission timing of user terminal subsequently, carries out time adjustment with the reception of the ul transmissions to different mobile terminal timing.In addition, detection reference signal also has other purposes, will not enumerate here.
Define detection reference signal in LTE and only take a symbol, send together with data; Simultaneously, also be defined by a cyclic shift parameter, support that multiple user terminal sends detection reference signal on identical running time-frequency resource, according to the selection range of cyclic shift parameter value, can know that LTE supports that at most eight user terminals transmit detection reference signal on identical running time-frequency resource.Therefore, be configured for the bandwidth sending detection reference signal to each user terminal and just must consider raising allocation efficiency of resource and the availability of frequency spectrum as far as possible.
In prior art when carrying out Resourse Distribute to detectable signal, being generally distribute corresponding resource according to down channel quality to the multiple user terminals in community, and not considering that each user's frequency deviation is on the impact of detection reference signal measurement performance.Send between detection reference signal for the multiple of frequency division or many groups user, due to the difference of frequency deviation, inter-carrier interference (ICI) and the inter-user interference (MAI) of multiple user can be introduced, particularly for two or two groups of users of identical frequency band difference transmission comb (Comb), MAI can have a strong impact on the performance of measurement; Transmit multiple users of detection reference signal on the same transmission comb of identical frequency band, MAI with ICI can the difficulty that is separated of adding users and complexity greatly, the measurement performance of deterioration detecting reference signal, and these all can the throughput of final influential system.
Summary of the invention
Main purpose of the present invention is to provide a kind of resource allocation methods for sending detection reference signal and device, at least to solve the problem that above-mentioned multiple user causes the certainty of measurement of detection reference signal to decline because frequency deviation differs greatly.
According to an aspect of the present invention, provide a kind of resource allocation methods for sending detection reference signal SRS, the method comprises: the frequency deviation of the user in base station measurement community; Dividing into groups to the user in community according to the frequency deviation measured in this base station, makes the frequency deviation difference in each group between user be less than set point; SRS resource distribution is carried out to each user's group after grouping in this base station.
Wherein, base station is carried out grouping to the user in community comprise according to the frequency deviation measured: base station determines that the user in community sends the bandwidth of SRS; Base station divides number of users thresholding to divide into groups to the user in community according to the frequency deviation of the bandwidth determined, measurement and code, and wherein, code divides number of users thresholding to be the maximum number of user sending SRS on identical running time-frequency resource.
The bandwidth that the user that base station is determined in community sends SRS comprises one of following:
The circuit loss value that base station reports according to the user's measurement in community and power headroom PHR, determine that user sends the bandwidth of SRS;
According to signal to noise ratio and power headroom, the signal to noise ratio of the user in base station measurement community and power headroom, determine that user sends the bandwidth of SRS.
Base station is divided number of users thresholding to carry out grouping to the user in community according to the frequency deviation of the bandwidth determined, measurement and code and is comprised: user identical for the bandwidth sending SRS is divided into one group by base station, obtains multiple first order user group; For each first order user group, the frequency deviation distribution of interior user is organized according to first order user in base station, frequency deviation difference is less than the user of set point as one group, obtains multiple second level user's group; For each second level user's group, the number of users in the user's group of the statistics second level, base station, is greater than code to number of users and divides second level user's group of number of users thresholding to divide into groups, make the often group number of users after grouping be less than or equal to code and divide number of users thresholding.
The frequency deviation distribution of interior user is organized according to first order user in base station, the user that frequency deviation difference is less than set point is comprised as one group: the frequency deviation region of the frequency deviation determination first order user group of interior user is organized in base station according to first order user, set multiple frequency deviation fiducial value according to frequency deviation region; Frequency deviation region is divided into multiple interval according to multiple frequency deviation fiducial value and set point by base station, and make frequency deviation fiducial value be the central value in this interval, the frequency deviation difference of each interval two ends frequency deviation is less than set point; Using each interval corresponding user as one group.
Wherein, base station is carried out SRS resource distribution to each user's group after grouping and is comprised: for the user in same group, the time slot in the SRS resource of base station assigns, frequency band are identical with transmission comb, the cyclic shift value difference of distribution; For the user between different groups, in the time slot in the SRS resource of base station assigns, frequency band and transmission comb, has a difference at least.
A difference is had at least to comprise in time slot in the SRS resource of this base station assigns, frequency band and transmission comb: for the user between different groups, the frequency deviation central value often organizing user is determined in base station; The difference of frequency deviation central value is distributed in the difference transmission comb of same time slot identical frequency band by base station more than the SRS resource of two user's groups of the first thresholding; The SRS resource that the difference of frequency deviation central value is organized more than the first thresholding and more than two users of the second thresholding is distributed in the nearby frequency bands of same time slot by base station; The SRS resource that the difference of frequency deviation central value is organized more than the second thresholding and more than two users of the 3rd thresholding is distributed in the different frequency bands of same time slot by base station; The difference of frequency deviation central value is distributed in different time slots more than the SRS resource of multiple user's groups of the 3rd thresholding by base station; Wherein, the first thresholding is less than the second thresholding, and the second thresholding is less than the 3rd thresholding.According to a further aspect in the invention, providing a kind of resource allocation device for sending detection reference signal SRS, comprising: frequency deviation measurement module, for measuring the frequency deviation of the user in community; Grouping module, divides into groups to the user in community for the frequency deviation measured according to frequency deviation measurement module, makes the frequency deviation difference in each group between user be less than set point; Resource distribution module, for carrying out SRS resource distribution to each user's group after grouping module grouping.
Wherein, this grouping module comprises: bandwidth determining unit, for determining that the user in community sends the bandwidth of SRS; Grouped element, for determine according to bandwidth determining unit bandwidth, frequency deviation measurement module measure frequency deviation and code divide number of users thresholding to divide into groups to the user in community, wherein, code divides number of users thresholding to be the maximum number of user sending SRS on identical running time-frequency resource.
Grouped element comprises: first order grouping subelement, and the user that the bandwidth for transmission SRS bandwidth determining unit determined is identical is divided into one group, obtains multiple first order user group; Second level grouping subelement, for each first order user group obtained for first order grouping subelement, according to the frequency deviation distribution that first order user organizes interior user, is less than the user of set point as one group using frequency deviation difference, obtains multiple second level user's group; Third level grouping subelement, for each second level user's group obtained for second level grouping subelement, number of users in the user's group of the statistics second level, being greater than code to number of users divides second level user's group of number of users thresholding to divide into groups, and makes the often group number of users after grouping be less than or equal to code and divides number of users thresholding.
Second level grouping subelement comprises: reference value subelement, for organizing the frequency deviation region of the frequency deviation determination first order user group of interior user according to first order user, sets multiple frequency deviation fiducial value according to frequency deviation region; Interval division subelement, for frequency deviation region being divided into multiple interval according to multiple frequency deviation fiducial value and set point, make frequency deviation fiducial value be the central value in this interval, the frequency deviation difference of each interval two ends frequency deviation is less than set point; Divide subelement, for using each interval corresponding user as one group.
This resource distribution module comprises: allocation units in group, and for for the user in same group, the time slot in the SRS resource of distribution, frequency band are identical with transmission comb, and the cyclic shift value of distribution is different; Allocation units between group, for for the user between different groups, have a difference at least in the time slot in the SRS resource of distribution, frequency band and transmission comb.
Wherein, between group, allocation units comprise: off center value determination subelement, for for the user between different groups, determine the frequency deviation central value often organizing user; Subelement is distributed, for the difference of frequency deviation central value to be distributed in the difference transmission comb of same time slot identical frequency band more than the SRS resource of two user's groups of the first thresholding between first group; Distribute subelement between second group, the SRS resource for the difference of frequency deviation central value being organized more than the first thresholding and more than two users of the second thresholding is distributed in the nearby frequency bands of same time slot; Distribute subelement between 3rd group, the SRS resource for the difference of frequency deviation central value being organized more than the second thresholding and more than two users of the 3rd thresholding is distributed in the different frequency bands of same time slot; Subelement is distributed, for the difference of frequency deviation central value is distributed in different time slots more than the SRS resource of multiple user's groups of the 3rd thresholding between 4th group; Wherein, the first thresholding is less than the second thresholding, and the second thresholding is less than the 3rd thresholding.
Pass through the present invention, adopt when carrying out SRS resource and distributing, using the reference quantity of the frequency deviation of user as grouping, both taken full advantage of the resource of system, also solve the problem that multiple user causes because frequency deviation differs greatly the certainty of measurement of detection reference signal to decline, and then improve the throughput of system.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of the resource allocation methods for sending detection reference signal according to the embodiment of the present invention 1;
Fig. 2 is the flow chart of the resource allocation methods for sending detection reference signal according to the embodiment of the present invention 2;
Fig. 3 be according to the embodiment of the present invention 2 third time user grouping method flow diagram;
Fig. 4 is the structured flowchart of the resource allocation device for sending detection reference signal according to the embodiment of the present invention 3.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
The embodiment of the present invention, when carrying out SRS (detection reference signal) Resourse Distribute, introduces the frequency deviation of user, and then makes the frequency deviation difference of the user in same group in rational scope, ensures the precision that SRS measures.Based on this, embodiments provide a kind of resource allocation methods for sending detection reference signal and device.
Embodiment 1
Present embodiments provide a kind of resource allocation methods for sending detection reference signal, the method is described to be embodied as example on base station, and see Fig. 1, the method comprises the following steps:
Step S102, the frequency deviation of the user in base station measurement community;
Step S104, dividing into groups to the user in community according to the frequency deviation measured in base station, makes the frequency deviation difference in each group between user be less than set point;
The present embodiment, when dividing into groups, considers the frequency deviation of user, and the frequency deviation difference (differences of two user's frequency deviations) that grouping is organized between interior user is afterwards less than set point, and this set point can regulate according to the required precision of measuring.
Step S106, SRS resource distribution is carried out to each user's group after grouping in base station.
The present embodiment is when carrying out SRS resource and distributing, using the reference quantity of the frequency deviation of user as grouping, both taken full advantage of the resource of system, and also solved the problem that multiple user causes because frequency deviation differs greatly the certainty of measurement of detection reference signal to decline, and then improve the throughput of system.
When specifically dividing into groups, in order to ensure that in each group, the bandwidth of user is identical, and number of users in each group is reasonable, and above-mentioned steps S104 can comprise: base station determines that the user in community sends the bandwidth of SRS; Base station divides number of users thresholding to divide into groups to the user in community according to the frequency deviation of the bandwidth determined, measurement and code, and wherein, code divides number of users thresholding to be the maximum number of user sending SRS on identical running time-frequency resource.This yard point number of users thresholding can be determined in conjunction with the Measurement Algorithm of the number of users in community and base station physical layer.
The user determined in community for base station sends the bandwidth of SRS, can realize one of in the following ways:
1) circuit loss value that reports according to the user's measurement in community of base station and power headroom (Power Headroom, PHR), determine that user sends the bandwidth of SRS;
2) according to signal to noise ratio and power headroom, the signal to noise ratio of the user in base station measurement community and power headroom, determine that user sends the bandwidth of SRS.
When base station divides number of users thresholding to divide into groups to the user in community according to the frequency deviation of the bandwidth determined, measurement and code, following manner can be adopted to realize:
1) user identical for the bandwidth sending SRS is divided into one group by base station, obtains multiple first order user group;
2) for each first order user group, the frequency deviation distribution of interior user is organized according to first order user in base station, frequency deviation difference is less than the user of set point as one group, obtains multiple second level user's group; Such as: the frequency deviation region of the frequency deviation determination first order user group of interior user is organized in base station according to first order user, set multiple frequency deviation fiducial value according to frequency deviation region; Frequency deviation region is divided into multiple interval according to multiple frequency deviation fiducial value and set point by base station, and make frequency deviation fiducial value be the central value in this interval, the frequency deviation difference of each interval two ends frequency deviation is less than set point; Using each interval corresponding user as one group;
3) for each second level user's group, the number of users in the user's group of the statistics second level, base station, is greater than code to number of users and divides second level user's group of number of users thresholding to divide into groups, make the often group number of users after grouping be less than or equal to code and divide number of users thresholding.
After user grouping completes, SRS resource distribution is carried out to each user's group after grouping in base station, and this distribution can comprise: for the user in same group, and the time slot in the SRS resource of base station assigns, frequency band are identical with transmission comb, and the cyclic shift value of distribution is different; For the user between different groups, in the time slot in the SRS resource of base station assigns, frequency band and transmission comb, has a difference at least.
For the user between different groups, in order to ensure to have a difference at least in time slot, frequency band and the transmission comb in the SRS resource of base station assigns, following manner can be adopted to realize:
1) for the user between different groups, the frequency deviation central value often organizing user is determined in base station;
2) difference of frequency deviation central value is distributed in the difference transmission comb of same time slot identical frequency band by base station more than the SRS resource of two user's groups of the first thresholding;
3) SRS resource that the difference of frequency deviation central value is organized more than the first thresholding and more than two users of the second thresholding is distributed in the nearby frequency bands of same time slot by base station;
4) SRS resource that the difference of frequency deviation central value is organized more than the second thresholding and more than two users of the 3rd thresholding is distributed in the different frequency bands of same time slot by base station;
5) difference of frequency deviation central value is distributed in different time slots more than the SRS resource of multiple user's groups of the 3rd thresholding by base station; Wherein, the first thresholding is less than the second thresholding, and the second thresholding is less than the 3rd thresholding, is the value preset.
The present embodiment can be applied to LTE system and WiMAX system etc. supports and utilize detection reference signal to carry out the wireless communication system measured.
The present embodiment divides and is used in when sending the resource of detection reference signal, users all in community are divided into groups, the identical user of the bandwidth of transmission detection reference signal is allowed to belong to same group, and this threshold value of number of users that combination is preset is determined often to organize maximum numbers of users, and in conjunction with respective frequency deviation value, grouping situation is segmented, make the frequency deviation value finally often being organized user close, can MAI and ICI of each user in greatly reduction group, improving utilizes detection reference signal to carry out the certainty of measurement of the index of correlation such as channel quality measurement and Symbol Timing, solve exist in prior art differ greatly cause certainty of measurement to decline owing to organizing interior user's frequency deviation, between group, user's frequency deviation differs greatly and causes certainty of measurement to decline, and the degradation problem under two groups of user's frequency deviations of same time slot identical frequency band difference transmission comb differ greatly the certainty of measurement that causes existed in prior art, reduce the complexity of receiver, the precision that raising user terminal utilizes detection reference signal to carry out measuring and efficiency, final raising throughput of system.
Embodiment 2
The present embodiment, to be embodied as example in LTE system, provides a kind of resource allocation methods for sending detection reference signal, and the flow process of this embodiment specifically can be realized by base station, and see Fig. 2, the method comprises the following steps:
Step S202, the frequency deviation of all users in base station measurement community, code presupposition divides number of users threshold value.
Particularly, base station needs the measurement all users in community being carried out to frequency deviation, and code presupposition divides number of users threshold value.Wherein, code divides number of users threshold value to be the maximum user number sending detection reference signal on identical running time-frequency resource that base station presets, and can determine in conjunction with the Measurement Algorithm of the number of users in community and base station physical layer.In LTE system, this threshold value is no more than 8, and preferred value is 8 or 4.
As a part for embodiment, be convenient to subsequent analysis and illustrate, the present embodiment code presupposition divides number of users threshold value (being labeled as ThCdmNum) to be set to 8.
Step S204, base station determines that each user sends the bandwidth of detection reference signal, and carries out first time user grouping.
Particularly, for TDD LTE system, the circuit loss value that base station can report according to each user's measurement and power headroom (PowerHeadroom, PHR), determine that each user sends the bandwidth of detection reference signal.For FDD LTE system, base station according to the measurement signal to noise ratio of each user and the power headroom of each reporting of user, can determine that each user sends the bandwidth of detection reference signal.
User packet method is exactly that the user sending detection reference signal bandwidth identical is divided into same group for the first time, is equivalent to the process obtaining first order user group in embodiment 1.
Step S206, second time user grouping, in conjunction with the frequency deviation of each user, is carried out in base station.
Particularly, second time user grouping refers to that each user's group for obtaining after first time grouping is divided into groups further.Specifically, for each user's group obtained after first time grouping, organize the frequency deviation distribution of interior each user according to this user, it is split as many groups further, make the frequency deviation value of the often interior each user of group in these many groups close to (namely the frequency deviation difference of these users is less than set point).
A kind of method of preferably second time user grouping, it is exactly the frequency deviation value according to intra-cell users, determine the scope of frequency deviation value, and set multiple frequency deviation fiducial value and corresponding deviation, the scope of frequency deviation is divided multiple interval, and wherein fiducial value represents the central value in this interval, each interval corresponding user's group, then according to the frequency deviation value of each user, the group belonging to it is determined.This step is equivalent to the process obtaining second level user group in embodiment 1.
Step S208, number of users threshold value is divided in conjunction with code presupposition in base station, carries out third time grouping.
Particularly, user grouping refers to user's group second time user grouping obtained for the third time, segment further selectively, namely exceed to comprising number of users user's group that code presupposition divides number of users threshold T hCdmNum, segment further, be split into multiple groups, the frequency deviation value making it organize interior each user is close; To the user's group comprising number of users and do not exceed threshold T hCdmNum, then further do not segment.
Below in conjunction with accompanying drawing 3, the method implementation procedure of third time user grouping is described:
Step S302, the number of users that after the statistics second time user grouping of base station, each user's group comprises;
Particularly, always had L user's group after supposing second time user grouping, the number of users that user organizes i is N i, i=1,2 ..., L.
Step S304, base station is found and is comprised number of users and exceed user's group that code presupposition divides number of users threshold value;
Particularly, according in following formula search L user's group, comprise number of users and exceed user's group index set ψ that code presupposition divides number of users threshold value:
ψ = arg i ∈ { 1,2 , . . . , L } ( N i > ThCdmNum ) ;
Step S306, corresponding user's assembling and dismantling are divided into user's group that two or more number of users is no more than pre-set user number by base station.
Particularly, by each user's group comprised in user's group index set ψ, split into respectively and two or morely comprise user's group that number of users is no more than pre-set user number ThCdmNum.
It can be adopt the group number based on obtaining after fractionation minimum that user organizes method for splitting, makes often group comprise number of users difference criterion little as far as possible simultaneously; Concrete methods of realizing is:
1) the user's group index after first time user grouping is comprised all K by j (j ∈ ψ) jthe frequency deviation value of individual user sorts, and supposes to be respectively
As sorted from small to large, then ϵ 1 ≤ ϵ 2 ≤ . . . . . . ≤ ϵ K j .
As sorted from big to small, then ϵ 1 ≥ ϵ 2 ≥ . . . . . . ≥ ϵ K j .
2) the group number GroupNum after obtaining fractionation is calculated according to following formula j:
Wherein represent to positive infinity direction rounding operation.
3) according to group number GroupNum jcalculate the number of users that often group comprises, GroupNum wherein jthe number of users of-1 group is equal, is designated as UserNum0, and calculates according to following formula:
The number of users of last group, is designated as UserNum1, calculates according to following formula:
UserNum1＝K j-(GroupNum j-1)*UserNum0；
Wherein represent to minus infinity direction rounding operation.
4) according to the group number determined with often organize user number, user is selected to divide into groups in order.
Repeating above-mentioned steps 1 ~ step 4, just can completing the fractionation by comprising user's group in user's group index set ψ.Wherein, step 1 can be accepted or rejected according to actual conditions.If desired in the user's group split, the frequency deviation difference of user is less, can not perform step 1.
It can also be that user's assembling and dismantling to be split are divided into multiple groups that above-mentioned user organizes method for splitting, and wherein except the number of users of a group is no more than except pre-set user number, all the other numbers of users respectively organized are pre-set user number, and the concrete grammar that the method relates to is:
1) the user's group index after second time user grouping is comprised all K by j (j ∈ ψ) jthe frequency deviation value of individual user sorts, and supposes to be respectively
As sorted from small to large, then ϵ 1 ≤ ϵ 2 ≤ . . . . . . ≤ ϵ K j .
As sorted from big to small, then ϵ 1 ≥ ϵ 2 ≥ . . . . . . ≥ ϵ K j .
2) the group number GroupNum after obtaining fractionation is calculated according to following formula j:
3) according to group number GroupNum jcalculate the number of users that often group comprises, GroupNum wherein jthe number of users of-1 group is equal, is designated as UserNum0, then UserNum0=ThCdmNum; The number of users of last group, is designated as UserNum1, calculates according to following formula:
UserNum1＝K j-(GroupNum j-1)*UserNum0；
4) according to the group number determined with often organize user number, user is selected to divide into groups in order.
Repeating above-mentioned steps 1 ~ step 4, just can completing the fractionation by comprising user's group in user's group index set ψ.Wherein, step 1 can be accepted or rejected according to actual conditions.If desired in the user's group split, the frequency deviation difference of user is less, can not perform this step 1.
Step S210, SRS resource distribution is carried out to each user's group obtained in base station.
Particularly, for LTE system, SRS resource comprises time slot, frequency band, transmission comb and cyclic shift, and wherein transmission comb is chosen from 0 and 1, and cyclic shift value is chosen from the integer of 0 ~ 7.According to step S206, available multiple user's group, be designated as total total P group, wherein the number of users of i-th group is λ i, i=1,2 ..., P.Suppose that this group index also represents that the average of the often interior each user's frequency deviation of group sorts from small to large.
Carrying out SRS resource distribution to each user's group obtained comprises with under type:
For the user in same group, distribute identical time slot, frequency band, transmission comb and different cyclic shift value.In order to reduce MAI and ICI further, the cyclic shift value of different user can be retrained, making the minimal circulation shift value between user maximum.As the λ to i-th group iindividual user, distributes identical time slot, frequency band, transmission comb and different cyclic shift value.Work as λ iwhen=1, then cyclic shift value is chosen arbitrarily; Work as λ iwhen=2, then cyclic shift value is from { 0,4}, { 1,5}, { 2,6}, { choosing one group in 3,7}; Work as λ iwhen=3 or 4, then cyclic shift value is from { 0,2,4,6}, { choosing one group in 1,3,5,7}; Work as λ iduring > 4, from 0 ~ 7, choose λ arbitrarily iindividual value.The cyclic shift value finally will chosen, distributes to λ iindividual user.
For the user between different groups, in the time slot of distribution, frequency band, transmission comb resource, there is one or more difference.For i-th group and jth group, identical time slot and frequency band can be distributed, different transmission combs; Also identical time slot can be distributed, different frequency bands; Can also be different time slots, identical frequency band; Time slot that can also be different, different frequency bands.In rear three kinds of situations, transmission comb resource can not retrain.
On this basis, one preferably SRS resource distribution method is: first set three threshold values, wherein the first thresholding is less than the second thresholding, and the second thresholding is less than the 3rd thresholding, then, the SRS resource that two users that the difference of the frequency deviation central value of user's group is no more than the first thresholding organize is divided the difference transmission comb in same time slot identical frequency band, the nearby frequency bands at same time slot is divided by the SRS resource that two users that the difference of the frequency deviation central value of user's group is no more than the second thresholding organize, the different frequency bands at same time slot is divided by the SRS resource that two users that the difference of the frequency deviation central value of user's group is no more than the 3rd thresholding organize, the difference of frequency deviation central value user organized is divided at different time slots more than the SRS resource of two or more user's groups of the 3rd thresholding.
Example is assigned as with the SRS resource of two time slots.Suppose that, in the P group user obtained, 1st ~ i group frequency deviation value difference is less, and be no more than the 3rd thresholding, i-th+1 ~ P group frequency deviation difference is also no more than the 3rd thresholding, but the frequency deviation of 1st ~ i group and i-th+1 ~ P group differs greatly, more than the 3rd thresholding.Therefore, the user of 1st ~ i group distributes the SRS resource in time slot 1; The user of i-th+1 ~ P group distributes the SRS resource in time slot 2.
In 1st ~ i group two groups: i0 and i1.These two groups if the same user's assembling and dismantling obtained after second time grouping divide obtain, then the frequency deviation central value of i0 and i1 group is close, be no more than the first thresholding, divide the difference transmission comb at the same frequency band of same time slot to the SRS resource of their distribution, the SRS resource also can distributed to their divides the nearby frequency bands at same time slot.These two groups to be divided if not same user's assembling and dismantling of obtaining after second time grouping and obtain, but their frequency deviation central value difference little (more than the first thresholding but be no more than the second thresholding), then the SRS resource of distributing to their divides the nearby frequency bands at same time slot.According to this method, be assigned with SRS resource to this i group, make the difference of identical frequency band transmit two user's groups of comb close to frequency deviation, it is little that the user of nearby frequency bands organizes frequency deviation difference.
For i-th+1 ~ P group, adopt the SRS resource distribution method with 1st ~ i group.
The resource allocation methods for sending detection reference signal that the present embodiment provides, users all in community are divided into groups, the identical user of the bandwidth of transmission detection reference signal is allowed to belong to same group, and this threshold value of number of users that combination is preset is determined often to organize maximum numbers of users, and in conjunction with respective frequency deviation value, grouping situation is segmented, make the frequency deviation value finally often being organized user close, can MAI and ICI of each user in greatly reduction group, improving utilizes detection reference signal to carry out the certainty of measurement of the index of correlation such as channel quality measurement and Symbol Timing, solve exist in prior art differ greatly cause certainty of measurement to decline owing to organizing interior user's frequency deviation, between group, user's frequency deviation differs greatly and causes certainty of measurement to decline, and the problem of the certainty of measurement decline caused that differs greatly in two groups of user's frequency deviations of same time slot identical frequency band difference transmission comb existed in prior art, reduce the complexity of receiver, the precision that raising user terminal utilizes detection reference signal to carry out measuring and efficiency, final raising throughput of system.
Embodiment 3
Present embodiments provide a kind of resource allocation device for sending detection reference signal, this device can be arranged on the equipment such as base station, and see Fig. 4, this device comprises:
Frequency deviation measurement module 42, for measuring the frequency deviation of the user in community;
Grouping module 44, is connected with frequency deviation measurement module 42, divides into groups to the user in community for the frequency deviation measured according to frequency deviation measurement module 42, makes the frequency deviation difference in each group between user be less than set point;
Resource distribution module 46, is connected with grouping module 44, carries out SRS resource distribution for each user's group after dividing into groups to grouping module 44.
In order to make full use of system resource, the grouping module 44 of the present embodiment comprises: bandwidth determining unit, for determining that the user in community sends the bandwidth of SRS; Grouped element, for determine according to bandwidth determining unit bandwidth, frequency deviation measurement module 42 measure frequency deviation and code divide number of users thresholding to divide into groups to the user in community, wherein, code divides number of users thresholding to be the maximum number of user (can be set as 8 or 4) sending SRS on identical running time-frequency resource.
Bandwidth determining unit one of in the following manner can determine that the user in community sends the bandwidth of SRS: the circuit loss value reported according to the user's measurement in community and power headroom, determines that described user sends the bandwidth of SRS; Or, measure signal to noise ratio and the power headroom of the user in community, determine that described user sends the bandwidth of SRS according to signal to noise ratio and power headroom.
Further, under consideration above-mentioned bandwidth, frequency deviation and code divide the prerequisite of number of users thresholding, above-mentioned grouped element can realize in the following way, and it comprises:
First order grouping subelement, the user that the bandwidth for transmission SRS bandwidth determining unit determined is identical is divided into one group, obtains multiple first order user group;
Second level grouping subelement, be connected with the first order subelement that divides into groups, for each first order user group obtained for first order grouping subelement, organize the frequency deviation distribution of interior user according to first order user, frequency deviation difference is less than the user of set point as one group, obtains multiple second level user's group;
Third level grouping subelement, be connected with the second level subelement that divides into groups, for each second level user's group obtained for second level grouping subelement, number of users in the user's group of the statistics second level, being greater than code to number of users divides second level user's group of number of users thresholding to divide into groups, and makes the often group number of users after grouping be less than or equal to code and divides number of users thresholding.
Preferably, above-mentioned second level grouping subelement comprises:
Reference value subelement, for organizing the frequency deviation region of the frequency deviation determination first order user group of interior user according to first order user, sets multiple frequency deviation fiducial value according to frequency deviation region;
Interval division subelement, is connected with reference value subelement, and for frequency deviation region being divided into multiple interval according to multiple frequency deviation fiducial value and set point, make frequency deviation fiducial value be the central value in this interval, the frequency deviation difference of each interval two ends frequency deviation is less than set point;
Divide subelement, be connected with interval division subelement, for using each interval corresponding user as one group.
After completing above-mentioned user grouping, carry out the distribution of resource, the resource distribution module 46 in the present embodiment can comprise:
Allocation units in group, for for the user in same group, the time slot in the SRS resource of distribution, frequency band are identical with transmission comb, and the cyclic shift value of distribution is different;
Allocation units between group, for for the user between different groups, have a difference at least in the time slot in the SRS resource of distribution, frequency band and transmission comb.
Between above-mentioned group, allocation units can comprise:
Off center value determination subelement, for for the user between different groups, determines the frequency deviation central value often organizing user;
Subelement is distributed, for the difference of frequency deviation central value to be distributed in the difference transmission comb of same time slot identical frequency band more than the SRS resource of two user's groups of the first thresholding between first group;
Distribute subelement between second group, the SRS resource for the difference of frequency deviation central value being organized more than the first thresholding and more than two users of the second thresholding is distributed in the nearby frequency bands of same time slot;
Distribute subelement between 3rd group, the SRS resource for the difference of frequency deviation central value being organized more than the second thresholding and more than two users of the 3rd thresholding is distributed in the different frequency bands of same time slot;
Subelement is distributed, for the difference of frequency deviation central value is distributed in different time slots more than the SRS resource of multiple user's groups of the 3rd thresholding between 4th group;
Wherein, the first thresholding is less than the second thresholding, and the second thresholding is less than the 3rd thresholding, and these three thresholdings can set in advance.
The present embodiment is when carrying out SRS resource and distributing, using the reference quantity of the frequency deviation of user as grouping, both taken full advantage of the resource of system, and also solved the problem that multiple user causes because frequency deviation differs greatly the certainty of measurement of detection reference signal to decline, and then improve the throughput of system.
As can be seen from the above description, the present invention divides into groups to users all in community, the identical user of the bandwidth of transmission detection reference signal is allowed to belong to same group, and this threshold value of number of users that combination is preset is determined often to organize maximum numbers of users, and in conjunction with respective frequency deviation value, grouping situation is segmented, make the frequency deviation value finally often being organized user close, can MAI and ICI of each user in greatly reduction group, improving utilizes detection reference signal to carry out the certainty of measurement of the index of correlation such as channel quality measurement and Symbol Timing, solve exist in prior art differ greatly cause certainty of measurement to decline owing to organizing interior user's frequency deviation, between group, user's frequency deviation differs greatly and causes certainty of measurement to decline, and the problem of the certainty of measurement decline caused that differs greatly in two groups of user's frequency deviations of same time slot identical frequency band difference transmission comb existed in prior art, reduce the complexity of receiver, the precision that raising user terminal utilizes detection reference signal to carry out measuring and efficiency, final raising throughput of system.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (9)

1. for sending a resource allocation methods of detection reference signal SRS, it is characterized in that, comprising:
The frequency deviation of the user in base station measurement community;
Divide into groups to the user in described community according to the described frequency deviation measured in described base station, the frequency deviation difference in each group between user is made to be less than set point, wherein, described base station is carried out grouping to the user in described community comprise according to the described frequency deviation measured: described base station determines that the user in described community sends the bandwidth of SRS; Described base station divides number of users thresholding to divide into groups to the user in described community according to the described frequency deviation of the described bandwidth determined, measurement and code, wherein, described code divides number of users thresholding to be the maximum number of user sending SRS on identical running time-frequency resource, described base station is divided number of users thresholding to carry out grouping to the user in described community according to described frequency deviation and the code of the described bandwidth determined, measurement and is comprised: user identical for the bandwidth of described transmission SRS is divided into one group by described base station, obtains multiple first order user group; For each described first order user group, the frequency deviation distribution of interior user is organized according to described first order user in described base station, frequency deviation difference is less than the user of described set point as one group, obtains multiple second level user's group; For each described second level user's group, the number of users in the user's group of the described second level is added up in described base station, being greater than described code to described number of users divides described second level user's group of number of users thresholding to divide into groups, and makes the often group number of users after grouping be less than or equal to described code and divides number of users thresholding;
SRS resource distribution is carried out to each user's group after grouping in described base station.
2. method according to claim 1, is characterized in that, the bandwidth that the user that described base station is determined in described community sends SRS comprises one of following:
The circuit loss value that described base station reports according to the user's measurement in described community and power headroom PHR, determine that described user sends the bandwidth of SRS;
According to described signal to noise ratio and power headroom, the signal to noise ratio of the user in community described in described base station measurement and power headroom, determine that described user sends the bandwidth of SRS.
3. method according to claim 1, is characterized in that, the frequency deviation distribution of interior user is organized according to described first order user in described base station, the user that frequency deviation difference is less than described set point is comprised as one group:
Described base station is determined the frequency deviation region that described first order user organizes to set multiple frequency deviation fiducial value according to described frequency deviation region according to the frequency deviation that described first order user organizes interior user;
Described frequency deviation region is divided into multiple interval according to described multiple frequency deviation fiducial value and described set point by described base station, makes described frequency deviation fiducial value be the central value in this interval, and the frequency deviation difference of each interval two ends frequency deviation is less than described set point; Using each interval corresponding user as one group.
4. method according to claim 1, is characterized in that, described base station is carried out SRS resource distribution to each user's group after grouping and comprised:
For the user in same group, the time slot in the SRS resource of described base station assigns, frequency band are identical with transmission comb, and the cyclic shift value of distribution is different;
For the user between different groups, in the time slot in the SRS resource of described base station assigns, frequency band and transmission comb, has a difference at least.
5. method according to claim 4, is characterized in that, for the user between different groups, has at least a difference to comprise in the time slot in the SRS resource of described base station assigns, frequency band and transmission comb:
For the user between different groups, the frequency deviation central value often organizing user is determined in described base station;
The difference of frequency deviation central value is distributed in the difference transmission comb of same time slot identical frequency band by described base station more than the SRS resource of two user's groups of the first thresholding;
The difference of frequency deviation central value is exceeded described first thresholding and is distributed in the nearby frequency bands of same time slot more than the SRS resource of two user's groups of the second thresholding by described base station;
The difference of frequency deviation central value is exceeded described second thresholding and is distributed in the different frequency bands of same time slot more than the SRS resource of two user's groups of the 3rd thresholding by described base station;
The SRS resource that the difference of frequency deviation central value is exceeded multiple user's groups of described 3rd thresholding by described base station is distributed in different time slots; Wherein, described first thresholding is less than described second thresholding, and described second thresholding is less than described 3rd thresholding.
6. for sending a resource allocation device of detection reference signal SRS, it is characterized in that, comprising:
Frequency deviation measurement module, for measuring the frequency deviation of the user in community;
Grouping module, divide into groups to the user in described community for the described frequency deviation measured according to described frequency deviation measurement module, make the frequency deviation difference in each group between user be less than set point, wherein, described grouping module comprises:
Bandwidth determining unit, for determining that the user in described community sends the bandwidth of SRS;
Grouped element, the described frequency deviation measured for the described bandwidth determined according to described bandwidth determining unit, described frequency deviation measurement module and code divide number of users thresholding to divide into groups to the user in described community, wherein, described code divides number of users thresholding to be the maximum number of user sending SRS on identical running time-frequency resource, described grouped element comprises: first order grouping subelement, the user identical for the bandwidth of described transmission SRS bandwidth determining unit determined is divided into one group, obtains multiple first order user group; Second level grouping subelement, for each described first order user group obtained for described first order grouping subelement, organize the frequency deviation distribution of interior user according to described first order user, frequency deviation difference is less than the user of described set point as one group, obtains multiple second level user's group; Third level grouping subelement, for each described second level user's group obtained for described second level grouping subelement, add up the number of users in the user's group of the described second level, being greater than described code to described number of users divides described second level user's group of number of users thresholding to divide into groups, and makes the often group number of users after grouping be less than or equal to described code and divides number of users thresholding;
Resource distribution module, for carrying out SRS resource distribution to each user's group after described grouping module grouping.
7. device according to claim 6, is characterized in that, described second level grouping subelement comprises:
Reference value subelement, the frequency deviation for organizing interior user according to described first order user is determined the frequency deviation region that described first order user organizes to set multiple frequency deviation fiducial value according to described frequency deviation region;
Interval division subelement, for described frequency deviation region being divided into multiple interval according to described multiple frequency deviation fiducial value and described set point, make described frequency deviation fiducial value be the central value in this interval, the frequency deviation difference of each interval two ends frequency deviation is less than described set point;
Divide subelement, for using each interval corresponding user as one group.
8. device according to claim 6, is characterized in that, described resource distribution module comprises:
Allocation units in group, for for the user in same group, the time slot in the SRS resource of distribution, frequency band are identical with transmission comb, and the cyclic shift value of distribution is different;
Allocation units between group, for for the user between different groups, have a difference at least in the time slot in the SRS resource of distribution, frequency band and transmission comb.
9. device according to claim 8, is characterized in that, between described group, allocation units comprise:
Off center value determination subelement, for for the user between different groups, determines the frequency deviation central value often organizing user;
Subelement is distributed, for the difference of frequency deviation central value to be distributed in the difference transmission comb of same time slot identical frequency band more than the SRS resource of two user's groups of the first thresholding between first group;
Subelement is distributed, for the difference of frequency deviation central value being exceeded described first thresholding and being distributed in the nearby frequency bands of same time slot more than the SRS resource of two users group of the second thresholding between second group;
Subelement is distributed, for the difference of frequency deviation central value being exceeded described second thresholding and being distributed in the different frequency bands of same time slot more than the SRS resource of two users group of the 3rd thresholding between 3rd group;
Distribute subelement between 4th group, the SRS resource for the multiple user's groups difference of frequency deviation central value being exceeded described 3rd thresholding is distributed in different time slots;
Wherein, described first thresholding is less than described second thresholding, and described second thresholding is less than described 3rd thresholding.
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