CN102892200A - Calling method and device for uplink multi-user MIMO (multi-input and multi-output) - Google Patents
Calling method and device for uplink multi-user MIMO (multi-input and multi-output) Download PDFInfo
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Abstract
The invention relates to a calling method for uplink multi-user MIMO (multi-input and multi-output). The calling method comprises the following steps of: determining UE (user equipment) to be paired which can be subjected to multi-user MIMO pairing, and acquiring UE pairs to be paired which meet pairing conditions according to a pairing principle; acquiring an MCS (modulation and coding scheme) level of each paired UE from the UE pairs to be paired; calculating an acquirable throughput after pairing according to the paired MSC level, and acquiring throughput increments of all paired UE pairs; and calling the paired UE according to a CCE (control channel element) aggregative degree factor of auxiliary UE, a performance increment factor of the paired UE and a priority factor of the auxiliary UE. The invention further provides a calling method for the uplink multi-user MIMO. By the adoption of the technical scheme provided by the invention, UE pairing information is sufficiently used by a base station side, so that the UE is favorable to pair and call more properly; and a PDCCH (Physical Downlink Control Channel) resource is used reasonably, so that the system throughput is ensured.
Description
Technical field
The present invention relates to the communications field, relate to particularly a kind of dispatching method for uplink multi-users MIMO and device.
Background technology
In wireless communication system, for improving message transmission rate and throughput of system, adopting multiple-input and multiple-output (MIMO, Multi-Input and Multi-Output) technology is an effective scheme.And in the Single User MIMO transmission of reality, if user side adopts many antennas to transmit, then need the user that a plurality of power amplifiers are arranged, in order to guarantee the light and handy of terminal phone, this is to be difficult to realize in practice.Therefore, in order to address this problem, up MIMO is not the mimo system on the practical significance, and up MU-MIMO (multiuser MIMO) is called again virtual MIMO, and it is two or more single antenna users of base station selection the transmission of datas in same time/frequency source block.Because signal is from different users, through different channels, the degree that interferes with each other between the user is different, therefore, the base station end must take the efficient scheduling method so that the interference between the pairing user is as much as possible little, simultaneously because uplink scheduling license PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel) CCE (Control Channel Element, the control channel unit) resource-constrained, therefore how to adopt more effective dispatching method, so that can be at the Radio Link transmitting after the pairing user pairing, the throughput of whole system can access the lifting of maximum simultaneously.
Summary of the invention
The technical problem that the present invention solves has been to provide a kind of dispatching method for uplink multi-users MIMO, to guarantee reliability and the robustness of the rear transmission of radio links of pairing, simultaneously so that the throughput of system obtains the lifting of maximum; The present invention also provides a kind of dispatching device for uplink multi-users MIMO.
For addressing the above problem, the invention provides a kind of dispatching method for uplink multi-users MIMO, comprise,
Determine to carry out the UE to be paired of multiuser MIMO pairing, namely homophony UE and auxiliary UE obtain UE to be paired pair that satisfies the pairing condition according to the pairing criterion;
Obtain the modulating-coding form MCS grade after each UE of UE centering to be paired matches;
According to obtainable throughput after the pairing of the MCS rating calculation after the pairing, and obtain the right throughput hoisting amount of all pairing UE;
According to the performance boost amount factor after the CCE aggregation degree factor of described auxiliary UE, the pairing UE pairing and the priority factors of auxiliary UE described pairing UE is dispatched.
Further, determine to carry out the UE to be paired of multiuser MIMO pairing, namely homophony UE and auxiliary UE are specially,
Priority according to UE is dispatched;
All UE that have been assigned to resource form homophony UE formation to be paired, and the scheduling UE conduct that other not have a resource of distributing and each main UE auxiliary UE formation to be paired.
Further, determine that the UE to be paired that can carry out the multiuser MIMO pairing comprises homophony UE and auxiliary UE, be specially,
Select the highest UE of priority to carry out resource and distribute, this UE is defined as homophony UE;
Other UE to be scheduled that circulate, according to judging with modulated degree UE whether satisfy multiuser MIMO pairing criterion, if satisfy, the auxiliary UE that then this user can be matched for homophony UE is with the auxiliary UE formation of matching of this UE adding homophony UE.
Further, if exist a plurality of users and homophony UE to satisfy MU-MIMO pairing condition, then calculate the matched user's who satisfies condition the scheduling factor, auxiliary UE and the homophony UE of selection scheduling factor maximum match.
Further, the described modulating-coding form MCS grade of obtaining after each UE of UE centering to be paired pairing comprises,
According to the Signal to Interference plus Noise Ratio SINR value after the correlation calculations of the UE interchannel to be paired UE to be paired pairing, obtain the modulating-coding form MCS grade after the pairing.
Further, comprise according to obtainable throughput after the pairing of the MCS rating calculation after the pairing,
Obtain MCS index I according to the MCS grade after the pairing
MCS, then according to I
MCSWith with TBS index I
TBSCorresponding table is tabled look-up and is obtained I
TBS, and according to I
TBSDetermine the transmission block size with the radio bearer RB number that UE distributes, to obtain the rear obtainable throughput of pairing.
Further, the right throughput hoisting amount of all pairing UE of described acquisition is specially,
UE throughput hoisting amount for pairing UE pairing after the difference of summation and the greater of the front transmission block of homophony UE, auxiliary UE pairing of transmission block size.
Further, the performance boost amount after described CCE aggregation degree according to described auxiliary UE, the pairing UE pairing and the priority factors of auxiliary UE are dispatched described pairing UE and are specially,
Calculate the scheduling factor, then the size order scheduling MU-MIMO according to the scheduling factor matches UE pair;
The described scheduling factor is
W＝W
1*UePriority+W
2*UeAggregationLevel+W
3*UeDeltaThroughput；
W wherein
1, W
2, W
2Be respectively the weighted factor of the UE priority weighted factor, UE CCE aggregation degree and the weighted factor of pairing UE performance boost amount, UePriority, UeAggregationLevel, UeDeltaThroughput are respectively user's priority factors, the CCE aggregation degree factor of UE uplink scheduling authorization control channel, and the throughput hoisting amount factor after user's pairing.
The present invention also provides a kind of dispatching device for uplink multi-users MIMO, it is characterized in that, comprise,
The UE determining unit, the UE to be paired that determines to carry out the multiuser MIMO pairing, i.e. homophony UE and auxiliary UE,
The UE pairing unit is obtained UE to be paired pair that satisfies the pairing condition according to the pairing criterion;
The lifting capacity of handling up computing unit obtains the modulating-coding form MCS grade after each UE of UE centering to be paired matches; According to obtainable throughput after the pairing of the MCS rating calculation after the pairing, and obtain the right throughput hoisting amount of all pairing UE;
Pairing UE scheduling unit is dispatched described pairing UE according to the CCE aggregation degree factor of described auxiliary UE, the performance boost amount factor after the pairing UE pairing and the priority factors of auxiliary UE.
Further, described pairing UE scheduling unit specifically is used for,
Calculate the scheduling factor, then the size order scheduling MU-MIMO according to the scheduling factor matches UE pair;
The described scheduling factor is
W＝W
1*UePriority+W
2*UeAggregationLevel+W
3*UeDeltaThroughput
W wherein
1, W
2, W
3Be respectively the weighted factor of the UE priority weighted factor, UE CCE aggregation degree and the weighted factor of pairing UE performance boost amount, UePriority, UeAggregationLevel, UeDeltaThroughput are respectively user's priority factors, the CCE aggregation degree factor of UE uplink scheduling authorization control channel, and the throughput hoisting amount factor after user's pairing.
Adopt technical scheme of the present invention, on the one hand, allow base station side take full advantage of unpaired message between UE, be conducive to this UE is more suitably matched and dispatches; On the other hand, allow the PDCCH resource get the more reasonable use, throughput of system can be guaranteed.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of a part of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the dispatching method flow chart of multiuser MIMO of the present invention;
Fig. 2 is as the main multiuser MIMO pairing flow chart that carries out take SU-SIMO;
Fig. 3 matches take multiuser MIMO as main body and resource allocation flow figure;
Fig. 4 is a kind of dispatching device structure chart for uplink multi-users MIMO.
Embodiment
In order to make technical problem to be solved by this invention, technical scheme and beneficial effect clearer, clear, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 is the dispatching method flow chart of multiuser MIMO of the present invention, and as shown in Figure 1, the inventive method mainly may further comprise the steps:
Step S101, the base station end determines to carry out in advance the user equipment (UE) of MU-MIMO pairing, comprises homophony UE and auxiliary UE;
Step S102 according to the pairing criterion of multiuser MIMO, calculates and satisfies the UE to be paired of pairing condition to the correlation of channel, and the performance after the more uncorrelated pairing can be better;
In two two receipts systems, the channel matrix that UE to be paired is right is assigned as [h
11, h
21] and [h
12, h
22], if the complete quadrature of the channel of two UE, namely
The UE that then matches transmits can not exist between stream between two data flow at identical running time-frequency resource and disturbs; As seen the UE that matches is better to the interchannel orthogonality, and performance will be better after the pairing.
Step S103, according to SINR (the Signal to Interference plus Noise Ratio after the UE pairing to be paired of the correlation calculations of UEs interchannel to be paired, Signal to Interference plus Noise Ratio) value, thereby obtain new MCS (Modulation and Coding Scheme, modulating-coding collection) grade;
Because UE to be paired will be at identical running time-frequency resource transmitting data, the data flow of two UE must be disturbed producing each other.
Step S104 obtains I according to the MCS grade after the pairing
MCS, I
MCS=MCS is then according to I
MCSWith and I
TBSCorresponding table is tabled look-up and is obtained I
TBS, at last according to I
TBSThe RB (radio bearer) that distributes with UE counts by looking into the definite transmission block size of Transport block table, obtains the rear obtainable throughput of pairing;
I
MCSWith and I
TBSCorresponding table is form 8.6.1-1 among the agreement 3GPP TS36.213; The TbSize table is for showing 7.1.7.2.1 among the agreement 3GPP TS36.213.
Step S105 calculates the right throughput hoisting amount of all UE to be paired;
UE throughput hoisting amount for pairing UE pairing after the difference of summation and the greater of the front transmission block of homophony UE, auxiliary UE pairing of transmission block size, be DeltaTb=TbSize1 '+TbSize2 '-max (TbSize1, TbSize2), wherein TbSize1 and TbSize2 are respectively the transmission block size of transmitting before homophony UE and the auxiliary UE pairing;
Step S106 dispatches pairing UE according to the performance boost amount after the CCE aggregation degree of auxiliary UE, the pairing UE pairing and the priority factors of auxiliary UE.
The dispatching method of concrete MU-MIMO pairing is exactly to calculate the scheduling factor according to following formula, then according to the size order scheduling MU-MIMO pairing user of the scheduling factor couple.
The definition scheduling factor:
W＝W
1*UePriority+W
2*UeAggregationLevel+W
3*UeDeltaThroughput
W wherein
1, W
2, W
3Be respectively the weighted factor of UE priority, UE CCE aggregation degree and the weighted factor of pairing UE performance boost amount, wherein can adjust the weighted ratio repeated factor according to actual conditions.The below provides the priority factors that UePriority, UeAggregationLevel, UeDeltaThroughput are respectively the user, the CCE aggregation degree factor of UE uplink scheduling authorization control channel, and the throughput hoisting amount factor after the user pairing, in the user that can carry out the MU-MIMO pairing, consider these users' priority, required control channel resource also has the factors such as lifting to power system capacity.In practice, can select each weight factor according to the actual conditions of system, for example when the current C CE of system is not limited, can be with the weight factor W of CCE aggregation degree
2Be made as 0, only consider priority and the throughput hoisting amount of pairing UE; When wishing system throughput-maximized, and when not exclusively not considering user's priority, can be with the weighted factor W of priority
1Be set as 0.
Embodiment one
Suppose that this moment, system wished according to the preferential high UE of Priority Queuing, namely take alone family as main, then take SU-SIMO (the many outputs of the single input in alone family) under main condition, if if can carry out multiuser MIMO then match, take this dispatching method can ensure the performance of priority high user, ensured simultaneously the performance of system.
As shown in Figure 2, be that end definite UE that carries out in advance the MU-MIMO pairing in base station comprises homophony UE and auxiliary UE is specially take SU-SIMO as the main multiuser MIMO pairing flow chart that carries out,
S201 dispatches according to the priority of UE, i.e. Resources allocation, and definite RB quantity, RB position and MCS grade;
S202, all UE that have been assigned to resource form main UE formation to be paired, and the scheduling UE conduct that other not have a resource of distributing and each main UE auxiliary UE formation to be paired.
Travel through main UE formation to be paired and auxiliary UE formation, calculate the correlation of channel between the Resources allocation UEs and UEs to be dispatched, judge whether satisfy the pairing condition between the UEs, if satisfy, generate each UE formation to be paired of Resources allocation UEs;
Determine to satisfy the user of MU-MIMO pairing to rear, carry out above-mentioned steps S103 to S105, then according to user's priority factors, the CCE aggregation degree factor of user uplink scheduling authorization control channel, and the priority factors of the throughput hoisting amount factor after user's pairing is calculated the right scheduling factor of MU-MIMO user.The below provides a kind of computational methods of these three factors, but specifically is not confined to this kind method.
Auxiliary UE priority factors: according to priority auxiliary UE being sorted obtains the UeSortedIndex of each auxiliary UE, the auxiliary UE number TotalUeNum that statistics can be matched, priority is the UePriority=(TotalUeNum+1-UeSortedIndex) of the highest UE/TotalUeNum.Suppose that TotalNum is 5, then the Priority according to each UE of priority is respectively 5/5,4/5,3/5,2/5,1/5;
The CCE aggregation degree factor: according to the control channel CCE aggregation degree existence 1,2,4 of TS36.213 agreement uplink authorization, 8 four kind of value, therefore corresponding CCE aggregation degree factor UeAggregationLevel is respectively 1,1/2,1/4,1/8; Therefore can obtain according to the CCE number of auxiliary UE uplink authorization needs CCE aggregation degree factor UeAggregationLevel.
The throughput hoisting amount factor: the throughput hoisting amount is DeltaTb=TbSize1 '+TbSize2 '-max (TbSize1, TbSize2); At first ask for the maximum MaxDeltaTbs of all UE centering throughput hoisting amounts to be paired, then will calculate the throughput hoisting amount/MaxDeltaTbs of the right UeDeltaThroughput=reality of each UE to be paired.
Embodiment two:
This method is take multiuser MIMO as main body, carries out the resource distribution while belong to match.Concrete operation is as follows:
As shown in Figure 3, be to match take multiuser MIMO as main body and resource allocation flow figure, end definite user who carries out in advance the MU-MIMO pairing in base station comprises homophony UE and auxiliary UE is specially,
S301 selects the highest user i of priority to carry out resource and distributes, and this user is defined as homophony UE;
S302, other users to be scheduled of circulating, according to judging with modulated degree user i whether satisfy MU-MIMO pairing condition, if satisfy, the auxiliary UE that then this user can be matched for homophony UEi adds the auxiliary UE formation of matching of homophony UEi with this user;
If homophony UE do not find can with the user of its pairing, then this homophony UE carries out separately resource and distributes, and does not carry out the MU-MIMO pairing;
If only exist unique user and homophony UE to satisfy MU-MIMO pairing condition, then these two users carry out the MU-MIMO pairing.
If exist a plurality of users and homophony UE to satisfy MU-MIMO pairing condition, then calculate the matched user's who satisfies condition the scheduling factor, user and the homophony UE of selection scheduling factor maximum match.
Further, determine to satisfy the user of MU-MIMO pairing to rear, carry out above-mentioned steps S103 to S105, calculate the scheduling factor according to the performance boost amount after the CCE aggregation degree of auxiliary UE, the pairing UE pairing and the priority factors of auxiliary UE, dispatch matching UE after the user of selection scheduling factor maximum and homophony UE match.
When said method is implemented, until do not have schedulable user or do not have assignable resource location.
As shown in Figure 4, be a kind of dispatching device structure chart for uplink multi-users MIMO, a kind of dispatching device for uplink multi-users MIMO is provided, comprise,
The UE determining unit, the UE to be paired that determines to carry out the multiuser MIMO pairing, i.e. homophony UE and auxiliary UE,
The UE pairing unit is obtained UE to be paired pair that satisfies the pairing condition according to the pairing criterion;
The lifting capacity of handling up computing unit obtains the modulating-coding form MCS grade after each UE of UE centering to be paired matches; According to obtainable throughput after the pairing of the MCS rating calculation after the pairing, and obtain the right throughput hoisting amount of all pairing UE;
Pairing UE scheduling unit is dispatched described pairing UE according to the CCE aggregation degree factor of described auxiliary UE, the performance boost amount factor after the pairing UE pairing and the priority factors of auxiliary UE.
In the said apparatus, described pairing UE scheduling unit specifically is used for,
Calculate the scheduling factor, then the size order scheduling MU-MIMO according to the scheduling factor matches UE pair;
The described scheduling factor is
W＝W
1*UePriority+W
2*UeAggregationLevel+W
3*UeDeltaThroughput
W wherein
1, W
2, W
3Be respectively the weighted factor of the UE priority weighted factor, UE CCE aggregation degree and the weighted factor of pairing UE performance boost amount, UePriority, UeAggregationLevel, UeDeltaThroughput are respectively user's priority factors, the CCE aggregation degree factor of UE uplink scheduling authorization control channel, and the throughput hoisting amount factor after user's pairing.
Above-mentioned explanation illustrates and has described a preferred embodiment of the present invention, but as previously mentioned, be to be understood that the present invention is not limited to the disclosed form of this paper, should not regard the eliminating to other embodiment as, and can be used for various other combinations, modification and environment, and can in invention contemplated scope described herein, change by technology or the knowledge of above-mentioned instruction or association area.And the change that those skilled in the art carry out and variation do not break away from the spirit and scope of the present invention, then all should be in the protection range of claims of the present invention.
Claims (10)
1. a dispatching method that is used for uplink multi-users MIMO is characterized in that, comprise,
Determine to carry out the UE to be paired of multiuser MIMO pairing, namely homophony UE and auxiliary UE obtain UE to be paired pair that satisfies the pairing condition according to the pairing criterion;
Obtain the modulating-coding form MCS grade after each UE of UE centering to be paired matches;
According to obtainable throughput after the pairing of the MCS rating calculation after the pairing, and obtain the right throughput hoisting amount of all pairing UE;
According to the performance boost amount factor after the CCE aggregation degree factor of described auxiliary UE, the pairing UE pairing and the priority factors of auxiliary UE described pairing UE is dispatched.
2. method according to claim 1 is characterized in that, determines to carry out the UE to be paired of multiuser MIMO pairing, and namely homophony UE and auxiliary UE are specially,
Priority according to UE is dispatched;
All UE that have been assigned to resource form homophony UE formation to be paired, and the scheduling UE conduct that other not have a resource of distributing and each main UE auxiliary UE formation to be paired.
3. method according to claim 1 is characterized in that, determines that the UE to be paired that can carry out the multiuser MIMO pairing comprises homophony UE and auxiliary UE, be specially,
Select the highest UE of priority to carry out resource and distribute, this UE is defined as homophony UE;
Other UE to be scheduled that circulate, according to judging with modulated degree UE whether satisfy multiuser MIMO pairing criterion, if satisfy, the auxiliary UE that then this user can be matched for homophony UE is with the auxiliary UE formation of matching of this UE adding homophony UE.
4. method according to claim 3 is characterized in that, if exist a plurality of users and homophony UE to satisfy MU-MIMO pairing condition, then calculates the matched user's who satisfies condition the scheduling factor, and auxiliary UE and the homophony UE of selection scheduling factor maximum match.
5. according to claim 1 to 4 arbitrary described methods, it is characterized in that, the described modulating-coding form MCS grade of obtaining after each UE of UE centering to be paired pairing comprises,
According to the Signal to Interference plus Noise Ratio SINR value after the correlation calculations of the UE interchannel to be paired UE to be paired pairing, obtain the modulating-coding form MCS grade after the pairing.
6. method according to claim 5 is characterized in that, comprise according to obtainable throughput after the pairing of the MCS rating calculation after the pairing,
Obtain MCS index I according to the MCS grade after the pairing
MCS, then according to I
MCSWith with TBS index I
TBSCorresponding table is tabled look-up and is obtained I
TBS, and according to I
TBSDetermine the transmission block size with the radio bearer RB number that UE distributes, to obtain the rear obtainable throughput of pairing.
7. method according to claim 6 is characterized in that, the right throughput hoisting amount of all pairing UE of described acquisition is specially,
UE throughput hoisting amount for pairing UE pairing after the difference of summation and the greater of the front transmission block of homophony UE, auxiliary UE pairing of transmission block size.
8. according to claim 6 or 7 described methods, it is characterized in that, the performance boost amount after described CCE aggregation degree according to described auxiliary UE, the pairing UE pairing and the priority factors of auxiliary UE are dispatched described pairing UE and are specially,
Calculate the scheduling factor, then the size order scheduling MU-MIMO according to the scheduling factor matches UE pair;
The described scheduling factor is
W＝W
1*UePriority+W
2*UeAggregationLevel+W
3*UeDeltaThroughput；
W wherein
1, W
2, W
3Be respectively the weighted factor of the UE priority weighted factor, UE CCE aggregation degree and the weighted factor of pairing UE performance boost amount, UePriority, UeAggregationLevel, UeDeltaThroughput are respectively user's priority factors, the CCE aggregation degree factor of UE uplink scheduling authorization control channel, and the throughput hoisting amount factor after user's pairing.
9. a dispatching device that is used for uplink multi-users MIMO is characterized in that, comprise,
The UE determining unit, the UE to be paired that determines to carry out the multiuser MIMO pairing, i.e. homophony UE and auxiliary UE,
The UE pairing unit is obtained UE to be paired pair that satisfies the pairing condition according to the pairing criterion;
The lifting capacity of handling up computing unit obtains the modulating-coding form MCS grade after each UE of UE centering to be paired matches; According to obtainable throughput after the pairing of the MCS rating calculation after the pairing, and obtain the right throughput hoisting amount of all pairing UE;
Pairing UE scheduling unit is dispatched described pairing UE according to the CCE aggregation degree factor of described auxiliary UE, the performance boost amount factor after the pairing UE pairing and the priority factors of auxiliary UE.
10. device according to claim 9 is characterized in that, described pairing UE scheduling unit specifically is used for,
Calculate the scheduling factor, then the size order scheduling MU-MIMO according to the scheduling factor matches UE pair;
The described scheduling factor is
W＝W
1*UePriority+W
2*UeAggregationLevel+W
3*UeDeltaThroughput
W wherein
1, W
2, W
3Be respectively the weighted factor of the UE priority weighted factor, UE CCE aggregation degree and the weighted factor of pairing UE performance boost amount, UePriority, UeAggregationLevel, UeDeltaThroughput are respectively user's priority factors, the CCE aggregation degree factor of UE uplink scheduling authorization control channel, and the throughput hoisting amount factor after user's pairing.
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| CN109391957B (en) * | 2017-08-10 | 2022-01-25 | 中国移动通信有限公司研究院 | Communication processing method, device and storage medium |
| CN111372312A (en) * | 2018-12-26 | 2020-07-03 | 中兴通讯股份有限公司 | Time-frequency-space resource allocation method, computer device and computer readable storage medium |
| CN115226232A (en) * | 2022-07-20 | 2022-10-21 | 中国联合网络通信集团有限公司 | Resource allocation method and device, electronic equipment and storage medium |
| CN115278897A (en) * | 2022-07-20 | 2022-11-01 | 中国联合网络通信集团有限公司 | Resource allocation method and device, electronic equipment and storage medium |
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