CN102377463B - Pairing method in multiuser multiple input and multiple output system and apparatus thereof, data transmission method and apparatus thereof - Google Patents

Abstract

The invention provides a pairing method in a multiuser multiple input and multiple output (MIMO) system. The method comprises the following steps that: current scheduling users are selected and carrier wave signal to interference pulse noise ratios of the users are obtained; non-edge users in the current scheduling users are determined; and according to the carrier wave signal to interference pulse noise ratios, pairing is carried out on non-edge users; and among each set of the paired users, carrier wave signal to interference pulse noise ratios of all contained users are different. In addition, the invention also provides a pairing apparatus in a multiuser MIMO system. According to the invention, according to a carrier wave signal to interference pulse noise ratio, pairing is carried out with simple operation; and moreover, multiuser diversity gains can be effectively obtained.

Description

Matching method in multi-user MIMO system, data transmission method and device

Technical field

The present invention relates to multiple-input and multiple-output (MIMO, Multiple Input and Multiple 0utput) mobile radio system, particularly relate to the matching method that one is applied to uplink multiuser equipment (UE, UserEquipment) virtual MIMO.

Background technology

MIMO technology gets the attention because it can significantly improve power system capacity and spectrum efficiency, is one of key technology of next generation mobile communication, but mimo system requires to dispose many antennas, thus result in high complexity and high cost.In cellular environment, subscriber equipment is generally subject to the restriction of the aspects such as high complexity, volume, power consumption and cost, is difficult to equip multiple antenna.Therefore, at the initial stage of 3G and B3G/4G mobile communication, most of subscriber equipment still will use single antenna.Even if arrived the 4G stage, due to the generally expectation of less lighter equipment and demand, the antenna amount of user side will be restricted, and therefore the advantage of traditional MIMO technology is difficult to be played completely in uplink.Virtual MIMO (virtual MIMO is called for short V-MIMO) technology can solve above bottleneck, and it allows two or more to only have the user of single transmit antenna to transmit data on same Resource Block.So, transmitting terminal equivalence can regard many antennas as.User's pairing is the important and link of uniqueness of in V-MIMO system one, i.e. two or more single-antenna subscriber of base station selection composition V-MIMO transmission.Because signal is from different users, through different channels, the degree of interference mutually between user is different, therefore, only have and match process by effective user, the multi-user diversity gain of V-MIMO system could be obtained better, and make the mutual interference between pairing user minimum, ensure reliability and the robustness of the rear transmission of radio links of cooperation.Announce at present both at home and abroad to match the research of algorithm about user limited.In existing document or patent, user matches criterion based on random user pairing and orthogonal pairing.The maximum user of orthogonal pairing selection two channel orthogonality matches, this method can reduce the pairing interference between user, throughput of system is improved while maintenance radio link robustness, but large owing to searching orthogonal users amount of calculation, so complexity is too large.Then random two users that choose of random pair match, and relatively easily realize, but cannot obtain multi-user diversity gain, can not make throughput-maximized.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of matching method, data transmission method and device in multi-user MIMO system, realizes simple, and effectively can obtain multi-user diversity gain.

In order to solve the problem, the invention provides the matching method in a kind of multi-user MIMO system, comprising:

Select the user of current scheduling, obtain the carrier wave Signal to Interference plus Noise Ratio of user;

Determine the non-edge user in the user of described current scheduling;

Match to described non-edge user according to described carrier wave Signal to Interference plus Noise Ratio, wherein, every assembly is different to the carrier wave Signal to Interference plus Noise Ratio of each user that user comprises.

Further, said method also can have following characteristics, carries out pairing comprise according to carrier wave Signal to Interference plus Noise Ratio to described non-edge user:

A user is selected as an assembly to the 1st of user the user from described non-edge user to be paired; The user selecting to differ by more than the first default threshold value with the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user from remaining non-edge user as this assembly to the kth of a user user; The rest may be inferred, until determine all users of this assembly to user; K=2..m, m are the number of users that this assembly comprises user;

The rest may be inferred, until match complete by described non-edge user.

Further, said method also can have following characteristics, when selecting described kth user, if exist when differing by more than multiple user of the first default threshold value with the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user, to select with this assembly the minimum user of each subscriber channel correlation selected in user as this assembly the kth of a user user; If there is no user and the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user differ by more than the first default threshold value, then select to differ with the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user maximum user as this assembly to the kth of a user user.

Further, said method also can have following characteristics, selects an assembly to the user of first in user as follows: from described non-edge user to be paired, select a user as an assembly to user's first user based on equitable proportion criterion.

The present invention also provides a kind of data transmission method, after matching, also comprises according to the method for the invention to non-edge user:

The carrier wave Signal to Interference plus Noise Ratio of user after obtaining pairing;

Be that every assembly is to user resource allocation block resource and modulating-coding mechanism according to the carrier wave Signal to Interference plus Noise Ratio of user after pairing;

Every assembly sends information to be passed to user in identical Resource Block resource;

Base station use successive interference cancellation techniques receives the information that every assembly sends user.

Further, said method also can have following characteristics, the carrier wave Signal to Interference plus Noise Ratio of user after obtaining pairing as follows:

${\mathrm{CINR}}_i=\frac{{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ii}}\right|}^2}{\underset{j\≠i,j\∈1...m}{\mathrm{\Σ}}{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ij}}\right|}^2+{\mathrm{\σ}}^2\underset{j\∈1...m}{\mathrm{\Σ}}{\left|{\left(G\right)}_{\mathrm{ij}}\right|}^2}$

Wherein, G=(H ^hh+R _n) ^-1h ^h, H and R _nrepresent channel matrix and noise variance matrix respectively, σ ²for noise variance, i, j are user index, i=1...m, j=1...m, CINR _irepresent that an assembly is to the carrier wave Signal to Interference plus Noise Ratio after i-th user's pairing in user, m is the number of users that this assembly comprises user.

The present invention also provides the contrast means in a kind of multi-user MIMO system, comprising: carrier wave Signal to Interference plus Noise Ratio acquisition module, non-edge user determination module and matching module, wherein:

Described carrier wave Signal to Interference plus Noise Ratio acquisition module is used for: the user selecting current scheduling, obtains the carrier wave Signal to Interference plus Noise Ratio of described user;

Described non-edge user determination module is used for: determine the non-edge user in the user of described current scheduling;

Described matching module is used for: match to described non-edge user according to described carrier wave Signal to Interference plus Noise Ratio, and wherein, every assembly is different to the carrier wave Signal to Interference plus Noise Ratio of each user that user comprises.

Further, said apparatus also can have following characteristics, described matching module be for:

A user is selected as an assembly to the 1st of user the user from described non-edge user to be paired; The user selecting to differ by more than the first default threshold value with the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user from remaining non-edge user as this assembly to the kth of a user user; The rest may be inferred, until determine all users of this assembly to user; K=2..m, m are the number of users that this assembly comprises user; The rest may be inferred, until match complete by described non-edge user.

Further, said apparatus also can have following characteristics, described matching module be for:

When selecting described kth user, if exist when differing by more than multiple user of the first default threshold value with the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user, to select with this assembly the minimum user of each subscriber channel correlation selected in user as this assembly the kth of a user user; If there is no user and the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user differ by more than the first default threshold value, then select to differ with the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user maximum user as this assembly to the kth of a user user.

Further, said apparatus also can have following characteristics, described matching module be for: from described non-edge user to be paired, select a user as an assembly to user's first user based on equitable proportion criterion.

The present invention also provides a kind of data transmission device, comprises contrast means of the present invention, the second carrier wave Signal to Interference plus Noise Ratio acquisition module, resource distribution module and data reception module, wherein:

Described second carrier wave Signal to Interference plus Noise Ratio acquisition module is used for: the carrier wave Signal to Interference plus Noise Ratio of user after obtaining pairing;

Described resource distribution module is used for: be that every assembly is to user resource allocation block resource and modulating-coding mechanism according to the carrier wave Signal to Interference plus Noise Ratio of user after pairing;

Data reception module is used for: use successive interference cancellation techniques receives the information that every assembly sends user; Wherein, every assembly sends information to be passed to user in identical Resource Block resource.

Further, said apparatus also can have following characteristics, and described second carrier wave Signal to Interference plus Noise Ratio acquisition module is the carrier wave Signal to Interference plus Noise Ratio for user after obtaining pairing as follows:

${\mathrm{CINR}}_i=\frac{{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ii}}\right|}^2}{\underset{j\≠i,j\∈1...m}{\mathrm{\Σ}}{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ij}}\right|}^2+{\mathrm{\σ}}^2\underset{j\∈1...m}{\mathrm{\Σ}}{\left|{\left(G\right)}_{\mathrm{ij}}\right|}^2}$

Wherein, G=(H ^hh+R _n) ^-1h ^h, H and R _nrepresent channel matrix and noise variance matrix respectively, σ ²for system noise variance, i, j are user index, i=1...m, j=1...m, CINR _irepresent that an assembly is to the carrier wave Signal to Interference plus Noise Ratio after i-th user's pairing in user, m is the number of users that this assembly comprises user.

Users different for Signal to Interference plus Noise Ratio matches by the present invention, and receiver side adopts interference cancellation techniques first to resolve the information of the high user of Signal to Interference plus Noise Ratio, then the information of this user is eliminated as interference from Received signal strength, obtains the information of other users.Use matching method of the present invention, user's (signal is strong) that Signal to Interference plus Noise Ratio is high and the low user (signal is weak) of Signal to Interference plus Noise Ratio match, the interference of the weak user of signal to the strong user of signal is less, although the user that signal is strong is larger to user's interference that signal is weak, but utilize interference cancellation techniques first user profile strong for signal to be parsed, thus think that interference is known, useful to the reception of weak signal, thus improve the throughput of whole system.The present invention realizes simply, and effectively can obtain multi-user diversity gain.

Accompanying drawing explanation

Fig. 1 is the naive model example of uplink virtual mimo system;

Fig. 2 is the schematic flow sheet of the method for the invention;

Comparatively, wherein ordinate represents that the throughput that community is total, abscissa represent the not index in the same time of measurement to Fig. 3 throughput ratio that to be the present invention and prior art obtain at EVA70 channel.

Embodiment

The invention provides the matching method in a kind of uplink multi-user multi-input and multi-output system, comprising:

Step S1, selects the user of current scheduling, obtains the carrier wave Signal to Interference plus Noise Ratio of user;

Step S2, determines the non-edge user in the user of described current scheduling;

Step S3, matches to described non-edge user according to described carrier wave Signal to Interference plus Noise Ratio, and wherein, every assembly is different to the carrier wave Signal to Interference plus Noise Ratio of each user that user comprises.

Wherein, in step S2, according to such as under type determination non-edge user:

Determine that user arrives path loss (the Pass Loss of each base station, PL), to the PL of each base station, ascending sequence is carried out to user, if the difference of minimum value and sub-minimum is within the thresholding of setting, think that this user is for edge customer, otherwise this user is non-edge user.

Wherein, in step S3, according to carrier wave Signal to Interference plus Noise Ratio, pairing is carried out to described non-edge user and comprises:

A user is selected as an assembly to the 1st of user the user from described non-edge user to be paired; The user selecting to differ by more than the first default threshold value with the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user from remaining non-edge user as this assembly to the kth of a user user; If exist when differing by more than multiple user of the first default threshold value with the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user, to select with this assembly the minimum user of each subscriber channel correlation selected in user as this assembly the kth of a user user; If there is no user and the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user differ by more than the first default threshold value, then select to differ with the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user maximum user as this assembly to the kth of a user user; The rest may be inferred, until determine all users of this assembly to user; K=2..m, m are the number of users that every assembly comprises user;

The rest may be inferred, until match complete by described non-edge user.M value can be 2, also can be other values, and namely every assembly can comprise the user of more than 2 or 2 to user.

Wherein, from described non-edge user to be paired, select a user as an assembly to user's first user based on equitable proportion criterion, certainly, also can select first user, such as Stochastic choice based on other criterions, select based on polling mode.

The present invention also provides a kind of data transmission method, after matching, also comprises based on above-mentioned matching method to non-edge user

Step S4, the carrier wave Signal to Interference plus Noise Ratio of user after obtaining pairing;

Step S5 is that every assembly is to user resource allocation block resource and modulating-coding mechanism according to the carrier wave Signal to Interference plus Noise Ratio of user after pairing;

Step S6, every assembly sends information to be passed to user in identical Resource Block resource;

Step S7, base station use successive interference cancellation techniques receives the information that every assembly sends user.

Wherein, in step S4, the carrier wave Signal to Interference plus Noise Ratio of user after obtaining pairing as follows:

${\mathrm{CINR}}_i=\frac{{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ii}}\right|}^2}{\underset{j\≠i,j\∈1...m}{\mathrm{\Σ}}{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ij}}\right|}^2+{\mathrm{\σ}}^2\underset{j\∈1...m}{\mathrm{\Σ}}{\left|{\left(G\right)}_{\mathrm{ij}}\right|}^2}$

Wherein, G=(H ^hh+R _n) ^-1h ^h, H and R _nrepresent channel matrix and noise variance matrix respectively, σ ²for noise variance, i, j are user index, i=1...m, j=1...m, CINR _irepresent that an assembly is to the carrier wave Signal to Interference plus Noise Ratio after i-th user's pairing in user, m is the number of users that this assembly comprises user.H ^hthe conjugation of representing matrix H turns order.

Be paired into example with two users below and further illustrate the present invention.

The invention provides a kind of uplink multi-users MIMO data transmission method, comprise step:

Step 1: the user that base station selects this moment to dispatch according to dispatching criterion, obtains the carrier wave Signal to Interference plus Noise Ratio (CINR) of this user and this user path loss to each base station;

Step 2: base station, according to the PL value of this user to each base station, determines whether this user is edge customer; If this user is edge customer, process according to existing flow process, otherwise perform step 3;

Step 3: base station is combined according to the difference of carrier wave Signal to Interference plus Noise Ratio non-edge user, partner virtual MIMO user, and edge user do not match;

Step 4: for different pairing users, the CINR of user after calculating pairing respectively;

Due to step 3, couple user matches, and there is interference, and the CINR obtained in step 1 obtains, the CINR of user after therefore needing to recalculate pairing between pairing user based on non-matching user;

Step 5: base station is that often couple of pairing user distributes suitable RB (Resource Block according to the CINR calculated after pairing, Resource Block) resource and MCS (Modulation and Coding Scheme, modulating-coding mechanism) configuration, and be handed down to UE;

Step 6: pairing user sends information to be passed in identical RB resource;

Step 7: base station uses serial interference elimination (Successive Interference Cancellation, SIC) technology to receive the information of pairing user transmission.

When carrying out the pairing of different user in above-mentioned steps 3, the user of two different signal to noise ratios partnered, the user avoiding signal to noise ratio identical matches and makes to be formed between two users strong jamming; First choose first user according to equitable proportion criterion, obtain the CINR of this user; Secondly to choose from remaining users and the CINR of this user differs the user of more than delta_cinr (threshold value preset), preferably high than the CINR of this user user; If have multiple user all to meet the demands, then the user that the channel relevancy of prioritizing selection and first user is little; If do not have user to meet the demands, then to choose and this user CINR differs maximum user.

In above-mentioned steps 5, choose code modulation mode MCS when user sends according to the corresponding relation of CINR and BLER (Block Error Rate); According to the pairing resource requirement of user and the remaining bandwidth of current time, for pairing user distributes suitable RB resource;

In above-mentioned steps 7, owing to using interference to eliminate demodulation method, the signal that preferential restituted signal power is strong, use the matching method in step 3, easily distinguish strong signal, therefore effectively carry the demodulation performance of hyperintense signals; On the basis of the strong signal of correct demodulation, eliminated by strong signal as interference, the demodulation reliability of weak signal have also been obtained raising.

Below in conjunction with drawings and Examples, technical scheme of the present invention is described in detail.

A naive model example of up V-MIMO system as shown in Figure 1.Assuming that without the scene of area interference or single community, have 6 users in community, suppose wherein there are two users for edge customer, user's number that so base station can carry out matching only has 4.Suppose that each user only has a transmitting antenna, and base station side 2 reception antennas are installed.Base station dispatcher is selected 2 users to form V-MIMO and transmit data on identical running time-frequency resource, and can regard up like this as has 2 transmitting antennas.

As shown in Figure 2, the concrete implementation step of the inventive method is as follows:

Step 101: composition graphs 1, base station measurement obtains the CINR of user 1 to user 6, supposes to be respectively SINR1, SINR2, SINR3, SINR4, SINR5, SINR6, and the PL of 6 users, suppose to be respectively (PL11, PL12 ... .PL1n), (PL21, PL22 ... .PL2n), (PL31, PL32 ... .PL3n), (PL41, PL42 ... .PL4n), (PL51, PL52 ... .PL5n), (PL61, PL62 ... .PL6n), wherein n is the base station number in network.

Step 102: to the PL value of user 1 according to the sequence of ascending order obtain (PL11 ', PL12 ' ... .PL1n '), difference the dPL=PL11 '-PL12 ' of minimum path loss and time little path loss; Judge whether dPL is less than threshold value, if be less than, then judge that this user is as edge customer, otherwise this user is non-edge user.Threshold value can be taken as 5.Other users are judged successively in this way.Suppose that user 5 and user 6 are edge customer, other users are non-edge user.User 5 and user 6 process according to existing procedure.

Step 103: base station is that 4 non-edge users carry out user's pairing, according to equitable proportion criterion, preferentially choose user 1, in residue 3 users, the user of CINR difference on delta_cinr (threshold value preset according to simulation result) of selection and user 1, is assumed to be user 2; If there is multiple user to meet, so choose and user that between user 1, channel relevancy is minimum.

In described step 103, equitable proportion criterion is for choosing the UE in formula below corresponding to f maximum:

$f=\underset{k\∈\{\mathrm{1,2},...,K\}}{\arg \max }\left(\frac{R_k\left(t\right)}{{\stackrel{\‾}{R}}_k\left(t\right)}\right)$

Wherein R (t)=log ₂(1+ γ (t)), γ (t) represents the CINR of t, and wherein K represents the total user's number that can be used for user's pairing.R _kt () represents the expection throughput of t user k, for the average throughput of user k.

Step 104: the CINR calculating pairing user, computing formula is as follows:

${\mathrm{CINR}}_i=\frac{{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ii}}\right|}^2}{\underset{j\≠i,j\∈1...m}{\mathrm{\Σ}}{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ij}}\right|}^2+{\mathrm{\σ}}^2\underset{j\∈1...m}{\mathrm{\Σ}}{\left|{\left(G\right)}_{\mathrm{ij}}\right|}^2}$

Wherein, G=(H ^hh+R _n) ^-1h ^h, H and R _nrepresent channel matrix and noise variance matrix respectively, σ ²for system noise variance, i, j represent pairing user index number, and in the present embodiment, m=2, i, j value is 1 and 2.

Step 105: according to the CINR value of pairing user, for pairing user chooses suitable MCS.Wherein the mapping relations of CINR and MCS are as shown in table 1:

Table 1

MCS(i)	CINR
		0	CINR＜CINR_MCS0
1	CINR_MCS0＝＜CINR＜CINR_MCS1
		2	CINR_MCS1＝＜CINR＜CINR_MCS2
3	CINR_MCS2＝＜CINR＜CINR_MCS3
		4	CINR_MCS3＝＜CINR＜CINR_MCS4

5	CINR_MCS4＝＜CINR＜CINR_MCS5
		6	CINR_MCS5＝＜CINR＜CINR_MCS6
7	CINR_MCS6＝＜CINR＜CINR_MCS7
		8	CINR_MCS7＝＜CINR＜CINR_MCS8
9	CINR_MCS8＝＜CINR＜CINR_MCS9
		10	CINR_MCS9＝＜CINR＜CINR_MCS10
11	CINR_MCS10＝＜CINR＜CINR_MCS11
		12	CINR_MCS11＝＜CINR＜CINR_MCS12
13	CINR_MCS12＝＜CINR＜CINR_MCS13
		14	CINR_MCS13＝＜CINR＜CINR_MCS14
15	CINR_MCS14＝＜CINR＜CINR_MCS15
		16	CINR_MCS15＝＜CINR＜CINR_MCS16
17	CINR_MCS16＝＜CINR＜CINR_MCS17
		18	CINR_MCS17＝＜CINR＜CINR_MCS18
19	CINR_MCS18＝＜CINR＜CINR_MCS19
		20	CINR_MCS19＝＜CINR＜CINR_MCS20
21	CINR_MCS20＝＜CINR＜CINR_MCS21
		22	CINR_MCS21＝＜CINR＜CINR_MCS22
23	CINR_MCS22＝＜CINR＜CINR_MCS23
		24	CINR_MCS23＝＜CINR＜CINR_MCS24
25	CINR_MCS24＝＜CINR＜CINR_MCS25
		26	CINR_MCS25＝＜CINR＜CINR_MCS26
27	CINR_MCS26＝＜CINR＜CINR_MCS27
		28	CINR_MCS27＝＜CINR

I=0,1 ..., 28 is emulate on the BLER curve under additive white Gaussian noise (Additive White Gaussian Noise, AWGN) channel 28 MCS of obtaining, and BLER is the CINR value of 10%.

When RB number is chosen, obtain the RB number of the user's needs needing RB more in pairing user, and compare with remaining bandwidth, choose the RB number that the smaller value in the two needs as pairing user, such as a user needs 10 RB, a user needs 8 RB, then select the RB number of the user needing RB number more, select 10 RB; And if remaining bandwidth is 11, then finally RB number is selected to be 10; If remaining bandwidth is 9, then finally RB number is selected to be 9.

Step 106: MCS and the RB number that user distributes according to base station dispatcher, identical running time-frequency resource sends information to be passed;

Step 107: base station uses serial interference elimination receiver to receive the data of two users of pairing.

Further, serial interference receiver can use MMSE-SIC (MinimumMean-Squared Error Successive Interference Cancellation, least mean-square error serial interference elimination) or ZF-SIC (Zero Forcing Successive Interference Cancellation, ZF serial interference elimination) receiver; First serial interference elimination receiver calculates the signal to noise ratio of two users, the user that signal to noise ratio is high first detects, detect that the signal of this user carries out the original symbol quantizing to obtain launching, and this signal is eliminated as interference, obtain the transmitting information of the low user of signal to noise ratio.

Above-mentioned identical method is used for other users remaining.

The specific embodiment of the invention is for two users, and for the pairing being greater than two users, the present invention is suitable for too.

The present invention also provides the contrast means in a kind of multi-user MIMO system, comprising: carrier wave Signal to Interference plus Noise Ratio acquisition module, non-edge user determination module and matching module, wherein:

Described carrier wave Signal to Interference plus Noise Ratio acquisition module is used for: the user selecting current scheduling, obtains the carrier wave Signal to Interference plus Noise Ratio of described user;

Described non-edge user determination module is used for: determine the non-edge user in the user of described current scheduling;

Described matching module is used for: match to described non-edge user according to described carrier wave Signal to Interference plus Noise Ratio, and wherein, every assembly is different to the carrier wave Signal to Interference plus Noise Ratio of each user that user comprises.

Wherein, described matching module be for:

A user is selected as an assembly to the 1st of user the user from described non-edge user to be paired; The user selecting to differ by more than the first default threshold value with the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user from remaining non-edge user as this assembly to the kth of a user user; The rest may be inferred, until determine all users of this assembly to user; K=2..m, m are the number of users that every assembly comprises user; The rest may be inferred, until match complete by described non-edge user.

Wherein, described matching module be for:

When selecting described kth user, if exist when differing by more than multiple user of the first default threshold value with the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user, to select with this assembly the minimum user of each subscriber channel correlation selected in user as this assembly the kth of a user user; If there is no user and the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user differ by more than the first default threshold value, then select to differ with the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user maximum user as this assembly to the kth of a user user.

Wherein, described matching module be for: from described non-edge user to be paired, select a user as an assembly to user's first user based on equitable proportion criterion.

The present invention also provides a kind of data transmission device, comprises above-mentioned contrast means, the second carrier wave Signal to Interference plus Noise Ratio acquisition module, resource distribution module and data reception module, wherein:

Described second carrier wave Signal to Interference plus Noise Ratio acquisition module is used for: the carrier wave Signal to Interference plus Noise Ratio of user after obtaining pairing;

Described resource distribution module is used for: be that every assembly is to user resource allocation block resource and modulating-coding mechanism according to the carrier wave Signal to Interference plus Noise Ratio of user after pairing;

Data reception module is used for: use successive interference cancellation techniques receives the information that every assembly sends user; Wherein, every assembly sends information to be passed to user in identical Resource Block resource.

Wherein, described second carrier wave Signal to Interference plus Noise Ratio acquisition module is the carrier wave Signal to Interference plus Noise Ratio for user after obtaining pairing as follows:

${\mathrm{CINR}}_i=\frac{{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ii}}\right|}^2}{\underset{j\≠i,j\∈1...m}{\mathrm{\Σ}}{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ij}}\right|}^2+{\mathrm{\σ}}^2\underset{j\∈1...m}{\mathrm{\Σ}}{\left|{\left(G\right)}_{\mathrm{ij}}\right|}^2}$

Wherein, G=(H ^hh+R _n) ^-1h ^h, H and Rn represents channel matrix and noise variance matrix, σ respectively ²for system noise variance, i, j are user index, i=1...m, j=1...m, CINR _irepresent that an assembly is to the carrier wave Signal to Interference plus Noise Ratio after i-th user's pairing in user, m is the number of users that this assembly comprises user.

Should be understood that, the above-mentioned description for preferred embodiment of the present invention is comparatively concrete, and therefore can not think the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with claims.

Claims (12)

1. the matching method in multi-user MIMO system, is characterized in that, comprising:

Select the user of current scheduling, obtain the carrier wave Signal to Interference plus Noise Ratio of user;

Determine the non-edge user in the user of described current scheduling;

Match to described non-edge user according to described carrier wave Signal to Interference plus Noise Ratio, wherein, every assembly is different to the carrier wave Signal to Interference plus Noise Ratio of each user that user comprises;

Wherein, according to such as under type determination non-edge user:

Determine that user arrives the path loss PL of each base station, carry out ascending sequence to user to the PL of each base station, if the difference of minimum value and sub-minimum within the thresholding of setting, thinks that this user is for edge customer, otherwise this user is non-edge user.

2. the method for claim 1, is characterized in that, carries out pairing comprise according to carrier wave Signal to Interference plus Noise Ratio to described non-edge user:

A user is selected as an assembly to the 1st of user the user from non-edge user to be paired; The user selecting to differ by more than the first default threshold value with the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user from remaining non-edge user as this assembly to the kth of a user user; The rest may be inferred, until determine all users of this assembly to user; K=2..m, m are the number of users that this assembly comprises user;

The rest may be inferred, until match complete by described non-edge user.

3. method as claimed in claim 2, it is characterized in that, when selecting described kth user, if exist when differing by more than multiple user of the first default threshold value with the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user, to select with this assembly the minimum user of each subscriber channel correlation selected in user as this assembly the kth of a user user; If there is no user and the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user differ by more than the first default threshold value, then select to differ with the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user maximum user as this assembly to the kth of a user user.

4. method as claimed in claim 2, it is characterized in that, select an assembly to the user of first in user as follows: from described non-edge user to be paired, select a user as an assembly to user's first user based on equitable proportion criterion.

5. a data transmission method, is characterized in that, after matching, also comprises based on the arbitrary described method of Claims 1-4 to non-edge user:

The carrier wave Signal to Interference plus Noise Ratio of user after obtaining pairing;

Be that every assembly is to user resource allocation block resource and modulating-coding mechanism according to the carrier wave Signal to Interference plus Noise Ratio of user after pairing;

Every assembly sends information to be passed to user in identical Resource Block resource;

Base station use successive interference cancellation techniques receives the information that every assembly sends user.

6. method as claimed in claim 5, is characterized in that, the carrier wave Signal to Interference plus Noise Ratio of user after obtaining pairing as follows:

${\mathrm{CINR}}_i=\frac{{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ii}}\right|}^2}{\underset{j\≠i,j\∈1...m\mathrm{}}{\mathrm{\Σ}}{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ij}}\right|}^2+{\mathrm{\σ}}^2\underset{j\∈1...m}{\mathrm{\Σ}}{\left|{\left(G\right)}_{\mathrm{ij}}\right|}^2}$

Wherein, G=(H ^hh+R _n) ^-1h ^h, H and R _nrepresent channel matrix and noise variance matrix respectively, σ ²for noise variance, i, j are user index, i=1 ... m, j=1 ... m, CINR _irepresent that an assembly is to the carrier wave Signal to Interference plus Noise Ratio after i-th user's pairing in user, m is the number of users that this assembly comprises user.

7. the contrast means in multi-user MIMO system, is characterized in that, comprising: carrier wave Signal to Interference plus Noise Ratio acquisition module, non-edge user determination module and matching module, wherein:

Described carrier wave Signal to Interference plus Noise Ratio acquisition module is used for: the user selecting current scheduling, obtains the carrier wave Signal to Interference plus Noise Ratio of described user;

Described non-edge user determination module is used for: determine the non-edge user in the user of described current scheduling;

Described matching module is used for: match to described non-edge user according to described carrier wave Signal to Interference plus Noise Ratio, and wherein, every assembly is different to the carrier wave Signal to Interference plus Noise Ratio of each user that user comprises;

Wherein, according to such as under type determination non-edge user:

Determine that user arrives the path loss PL of each base station, carry out ascending sequence to user to the PL of each base station, if the difference of minimum value and sub-minimum within the thresholding of setting, thinks that this user is for edge customer, otherwise this user is non-edge user.

8. device as claimed in claim 7, is characterized in that,

Described matching module be for:

A user is selected as an assembly to the 1st of user the user from non-edge user to be paired; The user selecting to differ by more than the first default threshold value with the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user from remaining non-edge user as this assembly to the kth of a user user; The rest may be inferred, until determine all users of this assembly to user; K=2..m, m are the number of users that this assembly comprises user; The rest may be inferred, until match complete by described non-edge user.

9. device as claimed in claim 8, is characterized in that, described matching module be for:

When selecting described kth user, if exist when differing by more than multiple user of the first default threshold value with the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user, to select with this assembly the minimum user of each subscriber channel correlation selected in user as this assembly the kth of a user user; If there is no user and the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user differ by more than the first default threshold value, then select to differ with the carrier wave Signal to Interference plus Noise Ratio of this assembly to each user selected in user maximum user as this assembly to the kth of a user user.

10. device as claimed in claim 8, is characterized in that, described matching module be for: from described non-edge user to be paired, select a user as an assembly to user's first user based on equitable proportion criterion.

11. 1 kinds of data transmission devices, is characterized in that: comprise as arbitrary in claim 7 to 10 as described in contrast means, the second carrier wave Signal to Interference plus Noise Ratio acquisition module, resource distribution module and data reception module, wherein:

Described second carrier wave Signal to Interference plus Noise Ratio acquisition module is used for: the carrier wave Signal to Interference plus Noise Ratio of user after obtaining pairing;

Described resource distribution module is used for: be that every assembly is to user resource allocation block resource and modulating-coding mechanism according to the carrier wave Signal to Interference plus Noise Ratio of user after pairing;

Data reception module is used for: use successive interference cancellation techniques receives the information that every assembly sends user; Wherein, every assembly sends information to be passed to user in identical Resource Block resource.

12. devices as claimed in claim 11, is characterized in that, described second carrier wave Signal to Interference plus Noise Ratio acquisition module is the carrier wave Signal to Interference plus Noise Ratio for user after obtaining pairing as follows:

${\mathrm{CINR}}_i=\frac{{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ii}}\right|}^2}{\underset{j\≠i,j\∈1...m\mathrm{}}{\mathrm{\Σ}}{\left|{\left(\mathrm{GH}\right)}_{\mathrm{ij}}\right|}^2+{\mathrm{\σ}}^2\underset{j\∈1...m}{\mathrm{\Σ}}{\left|{\left(G\right)}_{\mathrm{ij}}\right|}^2}$

Wherein, G=(H ^hh+R _n) ^-1h ^h, H and R _nrepresent channel matrix and noise variance matrix respectively, σ ²for system noise variance, i, j are user index, i=1 ... m, j=1 ... m, CINR _irepresent that an assembly is to the carrier wave Signal to Interference plus Noise Ratio after i-th user's pairing in user, m is the number of users that this assembly comprises user.