CN101562470B - Multiuser scheduling method, base station and user receiving device - Google Patents

Abstract

The invention provides a multiuser scheduling method, a base station and a user receiving device; wherein, the method comprises the following steps: determining the number of basic transmitting antennae required by each user for normal communication so as to determine the number of first configurable antennae of cyclic delay diversity transmitting antennae; obtaining an average signal-to-interference-and-noise-ratio of currently active users; comparing the average signal-to-interference-and-noise-ratio with a preset first abrupt change threshold, and classifying users with the average signal-to-interference-and-noise-ratio less than the first abrupt change threshold as a low signal-to-interference-and-noise-ratio user set; allocating low set cyclic delay samples and low set cyclic delay antennae for users in the low signal-to-interference-and-noise-ratio user set; and carrying out cyclic delay transmission diversity processing on the users in the low signal-to-interference-and-noise-ratio user set by the low set cyclic delay samples and the low set cyclic delay antennae. The technical proposal helps realize multiuser scheduling based on cyclic delay diversity technology, and is beneficial to improving communication quality by signal-to-interference-and-noise-ratio and fairness of multiuser scheduling.

Description

A kind of method of multi-subscriber dispatching, base station and user receiving device

Technical field

The present invention relates to the multi-user communication technical field, particularly relate to a kind of method and apparatus of multi-subscriber dispatching.

Background technology

In multiuser MIMO (Multiple Input Multiple Output) communication system, the signal that the user receives is except signal and noise, also can be subject to the interference of other subscriber signals, the interference of this other subscriber signals quality to received signal can cause larger adverse effect, finally can cause the reduction of power system capacity.The multiuser MIMO scheduling strategy is exactly the interference that will as far as possible avoid between the user, maximized system capacity, and guarantee user fairness as far as possible.

The circulation delay transmit diversity techniques refers to utilize the circulation delay emission same signal between different transmit antennas, obtaining certain emission diversity gain, and adopts the cyclic delay diversity reception technique to reach certain receive diversity gain at receiver side.The cyclic delay diversity technology can improve emission diversity gain and the receive diversity gain of signal, therefore can be described as a kind of Signal Enhanced Technology.Can't thoroughly eliminate in the situation that disturb, strengthening signal is a kind of method preferably.Yet, in prior art, cyclic delay diversity and multi-subscriber dispatching are not joined together to consider.

Therefore, it is necessary proposing a kind of multi-user dispatching method based on the cyclic delay diversity technology and device.And, multi-subscriber dispatching will inevitably relate to the feedback of user profile, yet the information feedback amount under multi-user environment is quite large, and therefore, the feedback quantity that how to reduce up link under the prerequisite that ensures cyclic delay diversity scheduling validity is also that technical problem to be solved is arranged.

Summary of the invention

Embodiments of the invention provide a kind of method and apparatus of multi-subscriber dispatching, realize to solve technical problem that the multi-user is dispatched on based on the basis of cyclic delay diversity technology.

To achieve these goals, on the one hand, provide a kind of method of multi-subscriber dispatching, comprised the steps:

Required basic number of transmit antennas when determining each user's proper communication is determined the first configurable antenna number of cyclic delay diversity transmitting antenna according to described basic number of transmit antennas;

Obtain the current average Signal to Interference plus Noise Ratio that is in the user of state of activation;

With described average Signal to Interference plus Noise Ratio and the first sudden change threshold of presetting, described average Signal to Interference plus Noise Ratio is classified as low Signal to Interference plus Noise Ratio user set less than the described first user who suddenlys change threshold value;

According to described the first configurable antenna number, for being in the low set of user assignment circulation delay sample and the low set circulation delay antenna in described low Signal to Interference plus Noise Ratio user set;

Utilize described low set circulation delay sample and described low set circulation delay antenna to carry out the processing of circulation delay transmit diversity to the user who is in described low Signal to Interference plus Noise Ratio user set.

Preferably, described average Signal to Interference plus Noise Ratio is the described current user who is in state of activation by detecting the Signal to Interference plus Noise Ratio on self every antenna, the average Signal to Interference plus Noise Ratio that calculates by the weighted factor of described every antenna.

Preferably, after described step with described average Signal to Interference plus Noise Ratio and default the first sudden change threshold, also comprise:

Described average Signal to Interference plus Noise Ratio is classified as high Signal to Interference plus Noise Ratio user set more than or equal to the described first user who suddenlys change threshold value;

The feedback cycle of average Signal to Interference plus Noise Ratio is set for the described current user who is in state of activation, is in the feedback cycle of the user in described high Signal to Interference plus Noise Ratio user set greater than the feedback cycle that is in the user in described low Signal to Interference plus Noise Ratio user set; And

Described current described feedback cycle and the residing Signal to Interference plus Noise Ratio user of this user aggregate information that is in the user of state of activation is sent to the described current user who is in state of activation.

Preferably, after described described feedback cycle with the described current user who is in state of activation and the residing Signal to Interference plus Noise Ratio user of this user aggregate information are sent to the described current user's who is in state of activation step, also comprise:

Receive and describedly currently be in the user of state of activation according to the described average Signal to Interference plus Noise Ratio of described feedback cycle periodic feedback.

Preferably, described the step of feedback cycle of average Signal to Interference plus Noise Ratio is set for the described current user who is in state of activation after, also comprise:

When the described current described average Signal to Interference plus Noise Ratio that is in the user of state of activation changes, change described feedback cycle;

Wherein, when described average Signal to Interference plus Noise Ratio becomes large, extend described feedback cycle; When described average Signal to Interference plus Noise Ratio diminishes, shorten described feedback cycle.

Preferably, after the current user's who is in state of activation of described acquisition average Signal to Interference plus Noise Ratio step, also comprise:

With described average Signal to Interference plus Noise Ratio and the second sudden change threshold of presetting, described the second sudden change threshold value is classified as common Signal to Interference plus Noise Ratio user set with described average Signal to Interference plus Noise Ratio more than or equal to described the first sudden change threshold value and less than the described second user who suddenlys change threshold value greater than described the first sudden change threshold value;

According to described the first configurable antenna number and be in the number of users of described low Signal to Interference plus Noise Ratio user set, determine to can be used for providing for the user in described common Signal to Interference plus Noise Ratio user set the second configurable antenna number of the antenna of circulation delay transmit diversity service;

According to described the second configurable antenna number, for being in user assignment ordinary set circulation delay sample and the ordinary set circulation delay antenna in described common Signal to Interference plus Noise Ratio user set;

Utilizing described ordinary set circulation delay sample and described ordinary set circulation delay antenna to carry out the circulation delay transmit diversity to the described user who is in low Signal to Interference plus Noise Ratio user set processes.

Preferably, after the step of the current user's who is in state of activation of described acquisition average Signal to Interference plus Noise Ratio, also comprise:

When the described current residing Signal to Interference plus Noise Ratio user set of user that is in state of activation is gathered not simultaneously with the described current user residing Signal to Interference plus Noise Ratio user in front once division who is in state of activation, with the described current user who is in state of activation of described change notification.

According to a further aspect in the invention, provide a kind of base station, having comprised:

Circulation delay antenna determination module, required basic number of transmit antennas when be used for determining each user's proper communication is determined the first configurable antenna number of cyclic delay diversity transmitting antenna according to described basic number of transmit antennas;

Average Signal to Interference plus Noise Ratio obtains module, is used for obtaining the current average Signal to Interference plus Noise Ratio that is in the user of state of activation;

The user gathers the division module, is used for described average Signal to Interference plus Noise Ratio and the first sudden change threshold of presetting are classified as low Signal to Interference plus Noise Ratio user set with described average Signal to Interference plus Noise Ratio less than the described first user who suddenlys change threshold value;

The circulation delay transmit diversity is processed processing module, is used for according to described the first configurable antenna number, for being in the low set of user assignment circulation delay sample and the low set circulation delay antenna in described low Signal to Interference plus Noise Ratio user set; Utilize described low set circulation delay sample and described low set circulation delay antenna to carry out the processing of circulation delay transmit diversity to the user who is in described low Signal to Interference plus Noise Ratio user set.

Preferably, described circulation delay transmit diversity processing processing module comprises:

Circulation delay sample distribution module is used to the described described low set circulation delay sample of user assignment that belongs in low Signal to Interference plus Noise Ratio user set;

Circulation delay antenna assignment module is used to the described described low set circulation delay antenna of user assignment that belongs in low Signal to Interference plus Noise Ratio user set;

The antenna control module is used for according to described low set circulation delay sample, described low set circulation delay antenna being selected to control.

Preferably, described base station also comprises:

Low Signal to Interference plus Noise Ratio user judge module is used for before described circulation delay transmit diversity processing module is processed, and judges whether the described current user who is in state of activation is in described low Signal to Interference plus Noise Ratio user gathers.

Preferably, described user gathers the division module also for described average Signal to Interference plus Noise Ratio is classified as high Signal to Interference plus Noise Ratio user set more than or equal to the described first user who suddenlys change threshold value; Described base station also comprises:

Feedback cycle arranges module, be used to the described current user who is in state of activation that the feedback cycle of described average Signal to Interference plus Noise Ratio is set, be in the feedback cycle of the user in described high Signal to Interference plus Noise Ratio user set greater than the feedback cycle that is in the user in described low Signal to Interference plus Noise Ratio user set;

Sending module is used for described current feedback cycle and the described current residing Signal to Interference plus Noise Ratio user of the user aggregate information that is in state of activation that is in the user of state of activation is sent to the described current user who is in state of activation.

Preferably, described base station also comprises:

Feedback cycle changes module, is used for changing described feedback cycle when the described current average Signal to Interference plus Noise Ratio that is in the user of state of activation changes;

Wherein, when described average Signal to Interference plus Noise Ratio becomes large, extend described feedback cycle; When described average Signal to Interference plus Noise Ratio diminishes, shorten described feedback cycle.

According to another aspect of the invention, provide a kind of user receiving device, having comprised:

The Signal to Interference plus Noise Ratio detection module is for detection of the Signal to Interference plus Noise Ratio on self every antenna;

Average Signal to Interference plus Noise Ratio computing module is used for the average Signal to Interference plus Noise Ratio by the weighted factor calculating user of described every antenna;

Average Signal to Interference plus Noise Ratio feedback module is used for calculating average Signal to Interference plus Noise Ratio and feeding back to the base station described.

Preferably, described receiving system also comprises:

Periodic feedback trigger control module is used for the feedback cycle of sending out according to the average Signal to Interference plus Noise Ratio of self, controls described average Signal to Interference plus Noise Ratio feedback module and periodically current average Signal to Interference plus Noise Ratio is fed back to the base station.

Preferably, described receiving system also comprises:

Whether user's Set Status judging unit is used for before described Signal to Interference plus Noise Ratio detection module detects, judge self to be in low Signal to Interference plus Noise Ratio user set, in this way, carry out described detection; Otherwise, process ends.

Embodiments of the invention have following technique effect at least:

Technique scheme provides a kind of multi-user dispatching method based on the cyclic delay diversity technology and device, by limited information feedback and cyclic diversity technology, can simplify multi-user's scheduling process and strengthen scheduling message, and by being carried out height Signal to Interference plus Noise Ratio user, the user gathers division, low Signal to Interference plus Noise Ratio user is adopted the cyclic delay diversity emission, the fairness that is conducive to improve low Signal to Interference plus Noise Ratio user's communication quality and improves multi-subscriber dispatching.

Description of drawings

Fig. 1 is the schematic diagram of the typical multi-user MIMO communication system of prior art;

Fig. 2 is the schematic flow sheet of the multi-user dispatching method of one embodiment of the invention;

Fig. 3 is in the multi-user dispatching method of the embodiment of the present invention, feedback cycle and Non-corresponding relation curve synoptic diagram;

Fig. 4 is in the multi-user dispatching method of another embodiment of the present invention, the schematic flow sheet of user's side;

Fig. 5 is in the multi-user dispatching method of another embodiment of the present invention, the schematic flow sheet of base station side;

Fig. 6 is the structural representation of the base station of one embodiment of the invention;

Fig. 7 is the structural representation of the base station of another embodiment of the present invention;

Fig. 8 is the structural representation of the user receiving device of one embodiment of the invention;

Fig. 9 is the structural representation of the user receiving device of another embodiment of the present invention.

Embodiment

For technical problem, technical scheme and advantage that the embodiment of the present invention will be solved is clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.

Fig. 1 is the schematic diagram of the typical multi-user MIMO communication system of prior art.As Fig. 1, this multi-user MIMO communication system comprises: base station and a plurality of user; Wherein, the number of transmit antennas of base station is M, and M has K user U (1) that is in state of activation to U (K) more than or equal to 1 in system, and each user's number of antennas is N, and N is more than or equal to 1.

Fig. 2 is the schematic flow sheet of the multi-user dispatching method of one embodiment of the invention.As Fig. 2, the method for the multi-subscriber dispatching of one embodiment of the invention comprises the steps:

Step 201, required basic number of transmit antennas when determining each user's proper communication is determined the first configurable antenna number of cyclic delay diversity transmitting antenna according to described basic number of transmit antennas;

Step 202 obtains the current average Signal to Interference plus Noise Ratio that is in the user of state of activation;

Step 203 with described average Signal to Interference plus Noise Ratio and the first sudden change threshold of presetting, is classified as low Signal to Interference plus Noise Ratio user set with described average Signal to Interference plus Noise Ratio less than the described first user who suddenlys change threshold value;

Step 204 is according to described the first configurable antenna number, for being in the low set of user assignment circulation delay sample and the low set circulation delay antenna in described low Signal to Interference plus Noise Ratio user set;

Step 205 utilizes described low set circulation delay sample and described low set circulation delay antenna to carry out the processing of circulation delay transmit diversity to the user who is in described low Signal to Interference plus Noise Ratio user set.

The below is described basic principle and the algorithm of the multi-user dispatching method of the embodiment of the present invention.

Base station transmit signals X _k ^tExperience channel H _k ^tAfter, the signal that k user receives constantly at t is Y _k ^t,

$Y_k^t=H_k^t{X}_k^t+N_k^t,$

N wherein _k ^tRepresent the noise signal that k user receives constantly at t, k=1 ..., K, K are in the number of users of state of activation for this residential quarter.

For OFDM (OFDM, Orthogonal Frequency Division Multiplexing) symbol, M transmit antennas in base station is transmitted into the signal of k user's n root antenna and is

$y_k\left(n\right)=\underset{m=1}{\overset{M}{\mathrm{\Σ}}}{h}_k(n,m)x_k\left(m\right)+n_k\left(m\right)$

Wherein M represents base station transmit antennas number, x _k(m), y _k(n), n _k(m) be respectively emission symbol, receiving symbol and noise, h _kThe channel response of (n, m) expression from base station m transmit antennas to k user n root antenna.

The Signal to Interference plus Noise Ratio SINR that can detect on k user's n root antenna at this moment, _k(n, m) be,

${\mathrm{SINR}}_k(n,m)=\frac{{\left|h_k(n,m)\right|}^2}{\frac{M}{\mathrm{\γ}\left(n\right)}+{\mathrm{\Σ}}_{m^{\′}\≠m}{\left|h_k(n,m^{\′})\right|}^2}$

Wherein M represents the base station transmit antennas number, and γ (n) is k the signal to noise ratio on user n root antenna.

If consider the weighted factor of every antenna, every user's average Signal to Interference plus Noise Ratio is,

${\stackrel{\‾}{\mathrm{SINR}}}_k=\underset{k=1}{\overset{N}{\mathrm{\Σ}}}{\mathrm{\α}}_k{\mathrm{SINR}}_k,$

α wherein _kWeighted factor for every antenna.

According to the first default sudden change threshold value Th _LWith the second sudden change threshold value Th _HCurrent each user who is in state of activation is divided into high Signal to Interference plus Noise Ratio user set, common Signal to Interference plus Noise Ratio user set or hang down Signal to Interference plus Noise Ratio user set, wherein, with average Signal to Interference plus Noise Ratio less than Th _LThe user be subdivided into low Signal to Interference plus Noise Ratio user set, with average Signal to Interference plus Noise Ratio more than or equal to Th _LAnd less than Th _HThe user be subdivided into common Signal to Interference plus Noise Ratio user set, with average Signal to Interference plus Noise Ratio more than or equal to Th _HThe user be subdivided into high Signal to Interference plus Noise Ratio user set.Th _LBe less than or equal to Th _HDue to, the user of high Signal to Interference plus Noise Ratio does not need just can obtain good received signal quality by cyclic delay diversity, therefore, only the user who is in low Signal to Interference plus Noise Ratio user set is carried out the cyclic delay diversity processing in an embodiment of the present invention, to obtain good received signal quality.Work as Th _LBe not equal to Th _HThe time, the user for being in common Signal to Interference plus Noise Ratio user set can not carry out any processing, and allow it carry out proper communication; Also can first configurable antenna number configurable according to reality and configured the second configurable antenna number of determining to can be used for providing for the user in common Signal to Interference plus Noise Ratio user set service to the antenna number of low Signal to Interference plus Noise Ratio user set, process thereby the user in common Signal to Interference plus Noise Ratio user set is carried out cyclic delay diversity, processing mode is with the processing mode to the user in low Signal to Interference plus Noise Ratio user set.

In order effectively to be in suitable circulation delay antenna and the circulation delay time samples of user assignment of hanging down in Signal to Interference plus Noise Ratio user set for each, each user who is in low Signal to Interference plus Noise Ratio user set must feed back to the base station with its average Signal to Interference plus Noise Ratio value, processes (time domain) or Phase Processing (frequency domain) so that corresponding circulation delay is carried out by following formula in the base station:

$x_k=x(t-{\mathrm{\&delta;}}_k)=\frac{1}{\sqrt{L}}\underset{a=0}{\overset{L-1}{\mathrm{\&Sigma;}}}{e}^{-\mathrm{<figure-callout\; id="2"\; label="j"\; filenames="S200810104443XE00021.png"\; state="\{\{state\}\}">j</figure-callout>}\frac{2\mathrm{\&pi;}}{L}a{\mathrm{\&delta;}}_k}X\left(a\right){\mathrm{<figure-callout\; id="2"\; label="e\; j"\; filenames="S200810104443XE00021.png"\; state="\{\{state\}\}">e</figure-callout>}}^j,$

δ wherein _kExpression time domain delay sample, L represents Fourier transform length, x and X (a) represent respectively transmitting of time domain and frequency domain, k=1 ..., M, wherein M represents the base station transmit antennas number.

If the span of time domain delay sample is [d _min, d _max], the average Signal to Interference plus Noise Ratio that the user of K state of activation returns is respectively

(k=1 ..., K), establish U _HAnd U _LBe respectively high Signal to Interference plus Noise Ratio user set and hang down Signal to Interference plus Noise Ratio user set, the feedback cycle that the base station arranges is PIERIOD _Feedback(k).

Preferably, due to the increase along with excited users,

Feedback can greatly increase the expense of air interface, therefore by further restriction

Feedback quantity, can reduce the amount of information of uplink feedback channel, thereby and reduce the expense of uplink air interface.Particularly, because the user of high Signal to Interference plus Noise Ratio does not need just can obtain good received signal quality by cyclic delay diversity, therefore do not need to feed back continually for these users

Only need periodically feedback, be and be in high Signal to Interference plus Noise Ratio user and gather U _HIn the feedback cycle of the average Signal to Interference plus Noise Ratio that arranges of user can be longer.Yet user's average Signal to Interference plus Noise Ratio can occur alternately to change under mobile status, gathers U if be in high Signal to Interference plus Noise Ratio user _HIn the user Undergo mutation, value diminishes, and shortens gradually this user's feedback cycle, until it changes to less than Th _L, this user develops U _LIn.And gather U for being in low Signal to Interference plus Noise Ratio user _LIn the user, because it must could obtain good received signal quality by cyclic delay diversity, therefore feed back continually for these users' needs

Be its feedback cycle and U _HIn the user compare, relatively shorter.If being in low Signal to Interference plus Noise Ratio user, these gather U _LIn the user

Undergo mutation, it is large that value becomes, and increases gradually this user's feedback cycle, until U _LIn the user

Value mutation arrives greater than Th _H, this U _LIn the user develop U _HIn.

Exemplarily, for being in U _HAnd U _LThe feedback cycle of user in user set can be respectively according to following Formula feedback cycle and

Between nonlinear correspondence relation, be in U _HAnd U _LWhen the average Signal to Interference plus Noise Ratio of the user in user set changes, the feedback cycle of this user's average Signal to Interference plus Noise Ratio can be changed according to this nonlinear correspondence relation, wherein, PIERIOD _Feedback(0) initial value of expression feedback cycle, this initial value can be selected empirical value:

$U_H:{\mathrm{PIERIOD}}_{\mathrm{feedback}}\left(k\right)={\mathrm{PIERIOD}}_{\mathrm{feedback}}\left(0\right)+{({\stackrel{\&OverBar;}{\mathrm{SINR}}}_k-{\mathrm{Th}}_H)}^{\mathrm{\&upsi;}}$

$U_L:{\mathrm{PIERIOD}}_{\mathrm{feedback}}\left(k\right)={\mathrm{PIERIOD}}_{\mathrm{feedback}}\left(0\right)-{({\stackrel{\&OverBar;}{\mathrm{SINR}}}_k-{\mathrm{Th}}_L)}^{\mathrm{\&upsi;}}$

Th wherein _HAnd Th _LBe respectively the user and gather U _HAnd U _L The sudden change threshold value, υ be feedback cycle and

Relational index, according to feedback cycle initial value PIERIOD _Feedback(0) difference, in practical application, υ can suitably adjust.In specific implementation, Th _HAnd Th _LValue can be identical or different.For Th _HAnd Th _LDifferent situations, Th _HGreater than Th _LDue to, under mobile status, user's average Signal to Interference plus Noise Ratio can change, and works as U _LUser's in user's set

Greater than sudden change threshold value Th _HThe time, need not carry out cyclic delay diversity to this user and process; And because average Signal to Interference plus Noise Ratio changes, work as U _HUser's in user's set

Less than sudden change threshold value Th _LThe time, need that this user is carried out cyclic delay diversity and process; As the user neither at U _LUser's set is not also at U _HIn the time of in user set, resource situation during according to cyclic delay diversity empty can adopt cyclic delay diversity to process, and also can not adopt cyclic delay diversity to process.

Exemplarily, Fig. 3 provided in three kinds of situations feedback cycle and

Non-corresponding relation curve.In these three kinds of situations, PIERIOD _Feedback(0), the value of Th and υ is slightly different.But as Fig. 3, the general character of three curves is, changes when violent at user's average signal-to-noise ratio, and it is more violent that feedback cycle corresponding to user also changes ground; And changing little and when relaxing at user's average signal-to-noise ratio, it is less and relax that feedback cycle corresponding to user also changes ground.

The below is described below the respective algorithms that the multi-user dispatching method of this embodiment of the invention adopts:

1) initialization: U _L=0, U _H=0, δ _k∈ [d _min, d _max], ${\stackrel{\&OverBar;}{\mathrm{SINR}}}_k=0(k=1,...,K),$

Prominent the first variable domain value is Th _L, the second variable domain value is Th _H, feedback cycle PIERIODfeedback (k) initial value is empirical value;

2) user of each state of activation calculates it And will

Value feeds back to the base station;

3) base station:

Note: to each user's

Sort

for?k＝0?to?K

$U_L(k)=\min \left({\stackrel{\&OverBar;}{\mathrm{SINR}}}_k\right)$

Distribute δ _kWith the circulation delay antenna to U _L(k)

$U_H\left(k\right)=\max \left({\stackrel{\&OverBar;}{\mathrm{SINR}}}_k\right)$

end?for

for?U _L(k)

if

Increase then PIERIOD _Feedback(k) elongated; End if;

if

Reduce then PIERIOD _Feedback(k) shorten; End if;

if

then?U _L(k)＝＞U _H(k)；end?if

end?for

for?U _H(k)

if

Increase then PIERIOD _Feedback(k) elongated; End if;

if Reduce then PIERIOD _Feedback(k) shorten; End if;

if

then?U _H(k)＝＞U _L(k)；end?if

end?for

4) if the residing Signal to Interference plus Noise Ratio user of user gathers, variation has occured, the base station is with this change notification user, and the state of the residing Signal to Interference plus Noise Ratio user set after the user changes according to oneself adopts corresponding receive mode.Exemplarily, as be in low Signal to Interference plus Noise Ratio user and gather U _L, carry out cyclic delay diversity and process; As not being in low Signal to Interference plus Noise Ratio user set, carry out acyclic delay diversity and process.

Above-mentioned 3) processing of mainly with program language, the base station being carried out in is described.

According to above-mentioned algorithm, the multi-user dispatching method of another embodiment of the present invention comprises the steps:

Initialization arranges: U _L=0, U _H=0, δ _k∈ [d _min, d _max], ${\stackrel{\&OverBar;}{\mathrm{SINR}}}_k=0(k=1,...,K),$

The first sudden change thresholding Th _L, the second sudden change threshold value is Th _H, feedback cycle PIERIOD _Feedback(k) initial value is empirical value;

Calculate the Signal to Interference plus Noise Ratio SINR that can detect on user's the n root antenna of each state of activation _k

By SINR _kCalculate each user's average Signal to Interference plus Noise Ratio And feedback

Value is to the base station;

The base station is to the user feedback of current state of activation

Sort;

Press

Value is chosen from low to high

A the user that value is minimum enters U _LChoose

B the user that value is the highest enters U _H

Be respectively set U _LIn circulation delay sample δ corresponding to user assignment _kWith the circulation delay antenna;

For set U _LIn the user, if Be Th greater than the first sudden change thresholding _L,

Feedback cycle PIERIOD _Feedback(k) elongated, until

Value greater than Th _HThe user is from set U _LMiddle differentiation is to U _H

For set U _HIf in the user

Be Th less than the sudden change thresholding _H,

Feedback cycle PIERIOD _Feedback(k) shorten, until

Value less than Th _LThe user is from set U _HMiddle differentiation is to U _L

When the user from the set U _LMiddle differentiation is to U _HOr from set U _HMiddle differentiation is to U _LThe user all must be notified in the base station;

The user selects to adopt corresponding receive mode according to own residing user's Set Status.

Fig. 4 is in the multi-user dispatching method of another embodiment of the present invention, the schematic flow sheet of user's side.As Fig. 4, the flow process of user's side comprises the steps:

Step 401, initialization SINR _k,

PIERIOD _Feedback, k represents k user;

Step 402 receives the signal that launch the base station;

Step 403 judges whether to be in the low Signal to Interference plus Noise Ratio set that the base station is divided; In this way, execution in step 405; Otherwise, execution in step 404; SINR _k

Step 404 is processed according to other default base band signal process side's schemes, and process ends;

Step 405, the Signal to Interference plus Noise Ratio SINR of every antenna of calculating user k _k

Step 406, the average Signal to Interference plus Noise Ratio of calculating user k

Step 407, whether the feedback cycle of the average Signal to Interference plus Noise Ratio of judgement feedback has arrived; In this way, execution in step 408; Otherwise, execution in step 409;

Step 408 is processed according to other default base band signal process side's schemes, and process ends;

Step 409, user feedback

To the base station, and process ends.

Exemplarily, if user k calculates first and feeds back average Signal to Interference plus Noise Ratio

It does not carry out the judgement of step 403; If user k is not the average Signal to Interference plus Noise Ratio that calculates first and feed back calculating user k And after the information that its its residing user who has acquired the base station transmission gathers, just carry out the judgement of step 403.

Fig. 5 is in the multi-user dispatching method of another embodiment of the present invention, the schematic flow sheet of base station side.As Fig. 5, the flow process of receiver side comprises the steps:

Step 501, initialization U _L, U _H, δ _k,

The first sudden change thresholding Th _L,

The second sudden change threshold value Th _H

Step 502 receives the feedback signal that the user launches;

Step 503, the average Signal to Interference plus Noise Ratio of base station to user feedback

Sort;

Step 504, according to above-mentioned sequence, the division of high and low Signal to Interference plus Noise Ratio set is carried out in the base station to the user, wherein,

Less than Th _LThe user be subdivided into low Signal to Interference plus Noise Ratio user set,

Greater than Th _HThe user be subdivided into high Signal to Interference plus Noise Ratio user set;

Step 505 has judged whether that downlink data sends; In this way, execution in step 507; Otherwise, execution in step 506;

Step 506 is processed according to other default base band signal process side's schemes, and process ends;

Step 507 is inquired about the residing high and low Signal to Interference plus Noise Ratio set of user;

Step 508 according to described inquiry, judges whether the user is in the low Signal to Interference plus Noise Ratio user set that the base station is divided; In this way, execution in step 510; Otherwise, execution in step 509;

Step 509 adopts default acyclic delay diversity launch scenario to process, and process ends;

Step 510 is distributed circulation delay time samples δ _kPostpone transmitting antenna with configuration cycles;

Step 511 is according to the δ that distributes _kWith the transmitting antenna of configuration, the user is carried out cyclic delay diversity emission processing, and process ends.

The embodiment of the invention also discloses a kind of base station.Fig. 6 is the structural representation of the base station of one embodiment of the invention.As Fig. 6, the base station of the embodiment of the present invention comprises:

Circulation delay antenna determination module 601, required basic number of transmit antennas when be used for determining each user's proper communication is determined the first configurable antenna number of cyclic delay diversity transmitting antenna according to described basic number of transmit antennas;

Average Signal to Interference plus Noise Ratio obtains module 602, is used for obtaining the current average Signal to Interference plus Noise Ratio that is in each user of state of activation;

The user gathers division module 603, be used for being divided into high and low Signal to Interference plus Noise Ratio user set according to described each user of large young pathbreaker of the average Signal to Interference plus Noise Ratio of described acquisition, described average Signal to Interference plus Noise Ratio is subdivided in described low Signal to Interference plus Noise Ratio user set less than the user of default the first sudden change threshold value, described average Signal to Interference plus Noise Ratio is subdivided in described high Signal to Interference plus Noise Ratio user set greater than the user of default the second sudden change threshold value, and described the first sudden change threshold value is less than or equal to described the second sudden change threshold value;

The circulation delay transmit diversity is processed processing module 604, is used for that the described user who is in low Signal to Interference plus Noise Ratio user set is carried out the circulation delay transmit diversity and processes.

Preferably, in the base station of this embodiment, described circulation delay transmit diversity is processed processing module and is comprised:

Circulation delay sample distribution module is used to the described user assignment circulation delay sample that belongs in low Signal to Interference plus Noise Ratio user set;

Circulation delay antenna assignment module is used to the described user assignment circulation delay antenna that belongs in low Signal to Interference plus Noise Ratio user set;

The antenna control module is used for according to described circulation delay sample, described circulation delay antenna being selected to control.

Preferably, the base station of this embodiment also comprises:

Low Signal to Interference plus Noise Ratio user judge module is used for before described circulation delay transmit diversity processing module is processed, and judges whether the user is in described low Signal to Interference plus Noise Ratio user set.

Preferably, the base station of this embodiment also comprises:

Feedback cycle arranges module, is used to described each user that the feedback cycle of average Signal to Interference plus Noise Ratio is set, and the described feedback cycle of the user in high Signal to Interference plus Noise Ratio user set that is in is greater than the described feedback cycle that is in the user in low Signal to Interference plus Noise Ratio user set;

Sending module is used for described each user's feedback cycle and residing Signal to Interference plus Noise Ratio user aggregate information are sent to described each user.

Preferably, the base station of this embodiment also comprises:

Feedback cycle changes module, is used for changing the feedback cycle of the average Signal to Interference plus Noise Ratio of described each user feedback self when variation has occured described each user's average Signal to Interference plus Noise Ratio.

Fig. 7 is the structural representation of the base station of another embodiment of the present invention.As Fig. 7, in this embodiment, the function that average Signal to Interference plus Noise Ratio obtains module is completed by base station radio-frequency transceiver module 701; The function of low Signal to Interference plus Noise Ratio user judge module is gathered enquiry module 704 by the user and is come inquiry judging.in this embodiment, after base station radio-frequency transceiver module 701 receives the signal that the user sends, at first the average Signal to Interference plus Noise Ratio by 702 pairs of active user's feedbacks of the average Signal to Interference plus Noise Ratio order module of base station user sorts, then utilize the user to gather division module 703 user that these users carry out high Signal to Interference plus Noise Ratio and low Signal to Interference plus Noise Ratio is gathered division, when downlink data transmission is carried out in the base station, if after gathering enquiry module 704 inquiries by the user, this user of judgement belongs to user's set of hanging down Signal to Interference plus Noise Ratio, by circulation delay sample distribution module 705, circulation delay antenna assignment module 706 and antenna control module 707 carry out the circulation delay sample for this user together and day line options is controlled.

The embodiment of the invention also discloses a kind of user receiving device.Fig. 8 is the structural representation of the user receiving device of the embodiment of the present invention.As Fig. 8, the user receiving device 800 of the embodiment of the present invention comprises:

Signal to Interference plus Noise Ratio detection module 801 is for detection of the Signal to Interference plus Noise Ratio on self every antenna;

Average Signal to Interference plus Noise Ratio computing module 802 is used for the average Signal to Interference plus Noise Ratio by the weighted factor calculating user of described every antenna;

Average Signal to Interference plus Noise Ratio feedback module 803 is used for calculating average Signal to Interference plus Noise Ratio and feeding back to the base station described.

Preferably, the user receiving device of this embodiment also comprises:

Periodic feedback trigger control module is used for the feedback cycle of sending out according to the average Signal to Interference plus Noise Ratio of self, controls described average Signal to Interference plus Noise Ratio feedback module and periodically current average Signal to Interference plus Noise Ratio is fed back to the base station;

Preferably, the user receiving device of this embodiment also comprises:

Whether user's Set Status judging unit is used for before described Signal to Interference plus Noise Ratio detection module detects, judge self to be in low Signal to Interference plus Noise Ratio user set, in this way, carry out described detection; Otherwise, process ends.

Fig. 9 is the structural representation of the user receiving device of another embodiment of the present invention.As Fig. 9, in the user receiving device of this embodiment, after user receiving device receives by user's radio-frequency (RF) receiving and transmission module 901 signal that sends the base station, at first judge own current whether being in the low Signal to Interference plus Noise Ratio user set of dividing the base station by user's Set Status judge module 902, if in low Signal to Interference plus Noise Ratio user set, detect the Signal to Interference plus Noise Ratio SINR on every antenna in base band Signal to Interference plus Noise Ratio detection module 903 _k, then calculated this user's average Signal to Interference plus Noise Ratio by the average Signal to Interference plus Noise Ratio computing module 904 of base band, controlled by periodic feedback trigger control module 905 at last, by average Signal to Interference plus Noise Ratio feedback module 906, current average Signal to Interference plus Noise Ratio is fed back to the base station.Be in high Signal to Interference plus Noise Ratio user set can mask above-mentioned processing by selector switch if judge by user's Set Status judge module 902.

Utilize the advantage after the technical scheme of the embodiment of the present invention to comprise:

1) user is carried out height Signal to Interference plus Noise Ratio user and gather division, low Signal to Interference plus Noise Ratio user is adopted the cyclic delay diversity emission, be conducive to improve low Signal to Interference plus Noise Ratio user's communication quality, improve the fairness of multi-subscriber dispatching;

2) low Signal to Interference plus Noise Ratio user feedback and periodic feedback can reduce the amount of information of uplink feedback channel, reduce the expense of uplink air interface;

3) dynamically divide high and low Signal to Interference plus Noise Ratio user set, meet the changeable actual environment of mobile subscriber's state.

The technical scheme of the embodiment of the present invention is not identical by the Noise and Interference impact that different users is suffered under different mobile statuss and different communication environment, therefore can be according to user's different situations, it is feasible suitably selecting cyclic delay diversity to participate in scheduling.The above is the preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the described principle of the embodiment of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (15)

1. the method for a multi-subscriber dispatching, is characterized in that, comprises the steps:

Required basic number of transmit antennas when determining each user's proper communication is determined the first configurable antenna number of cyclic delay diversity transmitting antenna according to described basic number of transmit antennas;

Obtain the current average Signal to Interference plus Noise Ratio that is in the user of state of activation;

With described average Signal to Interference plus Noise Ratio and the first sudden change threshold of presetting, described average Signal to Interference plus Noise Ratio is classified as low Signal to Interference plus Noise Ratio user set less than the described first user who suddenlys change threshold value;

According to described the first configurable antenna number, for being in the low set of user assignment circulation delay sample and the low set circulation delay antenna in described low Signal to Interference plus Noise Ratio user set;

Utilize described low set circulation delay sample and described low set circulation delay antenna to carry out the processing of circulation delay transmit diversity to the user who is in described low Signal to Interference plus Noise Ratio user set.

2. method according to claim 1, it is characterized in that, described average Signal to Interference plus Noise Ratio is the described current user who is in state of activation by detecting the Signal to Interference plus Noise Ratio on self every antenna, the average Signal to Interference plus Noise Ratio that calculates by the weighted factor of described every antenna.

3. method according to claim 1, is characterized in that, after described step with described average Signal to Interference plus Noise Ratio and default the first sudden change threshold, also comprises:

Described average Signal to Interference plus Noise Ratio is classified as high Signal to Interference plus Noise Ratio user set more than or equal to the described first user who suddenlys change threshold value;

The feedback cycle of average Signal to Interference plus Noise Ratio is set for the described current user who is in state of activation, is in the feedback cycle of the user in described high Signal to Interference plus Noise Ratio user set greater than the feedback cycle that is in the user in described low Signal to Interference plus Noise Ratio user set; And

Described current described feedback cycle and the residing Signal to Interference plus Noise Ratio user of this user aggregate information that is in the user of state of activation is sent to the described current user who is in state of activation.

4. method according to claim 3, it is characterized in that, after described described feedback cycle with the described current user who is in state of activation and the residing Signal to Interference plus Noise Ratio user of this user aggregate information are sent to the described current user's who is in state of activation step, also comprise:

Receive and describedly currently be in the user of state of activation according to the described average Signal to Interference plus Noise Ratio of described feedback cycle periodic feedback.

5. method according to claim 3, is characterized in that, described the step of feedback cycle of average Signal to Interference plus Noise Ratio is set for the described current user who is in state of activation after, also comprise:

When the described current described average Signal to Interference plus Noise Ratio that is in the user of state of activation changes, change described feedback cycle;

Wherein, when described average Signal to Interference plus Noise Ratio becomes large, extend described feedback cycle; When described average Signal to Interference plus Noise Ratio diminishes, shorten described feedback cycle.

6. method according to claim 3, is characterized in that, after the current user's who is in state of activation of described acquisition average Signal to Interference plus Noise Ratio step, also comprises:

With described average Signal to Interference plus Noise Ratio and the second sudden change threshold of presetting, described the second sudden change threshold value is classified as common Signal to Interference plus Noise Ratio user set with described average Signal to Interference plus Noise Ratio more than or equal to described the first sudden change threshold value and less than the described second user who suddenlys change threshold value greater than described the first sudden change threshold value;

According to described the first configurable antenna number and be in the number of users of described low Signal to Interference plus Noise Ratio user set, determine to can be used for providing for the user in described common Signal to Interference plus Noise Ratio user set the second configurable antenna number of the antenna of circulation delay transmit diversity service;

According to described the second configurable antenna number, for being in user assignment ordinary set circulation delay sample and the ordinary set circulation delay antenna in described common Signal to Interference plus Noise Ratio user set;

Utilizing described ordinary set circulation delay sample and described ordinary set circulation delay antenna to carry out the circulation delay transmit diversity to the described user who is in low Signal to Interference plus Noise Ratio user set processes.

7. method according to claim 3, is characterized in that, after the step of the current user's who is in state of activation of described acquisition average Signal to Interference plus Noise Ratio, also comprises:

When the described current residing Signal to Interference plus Noise Ratio user set of user that is in state of activation is gathered not simultaneously with the described current user residing Signal to Interference plus Noise Ratio user in front once division who is in state of activation, with the described current user who is in state of activation of described change notification.

8. a base station, is characterized in that, comprising:

Circulation delay antenna determination module, required basic number of transmit antennas when be used for determining each user's proper communication is determined the first configurable antenna number of cyclic delay diversity transmitting antenna according to described basic number of transmit antennas;

Average Signal to Interference plus Noise Ratio obtains module, is used for obtaining the current average Signal to Interference plus Noise Ratio that is in the user of state of activation;

The user gathers the division module, is used for described average Signal to Interference plus Noise Ratio and the first sudden change threshold of presetting are classified as low Signal to Interference plus Noise Ratio user set with described average Signal to Interference plus Noise Ratio less than the described first user who suddenlys change threshold value;

Circulation delay transmit diversity processing module is used for according to described the first configurable antenna number, for being in the low set of user assignment circulation delay sample and the low set circulation delay antenna in described low Signal to Interference plus Noise Ratio user set; Utilize described low set circulation delay sample and described low set circulation delay antenna to carry out the processing of circulation delay transmit diversity to the user who is in described low Signal to Interference plus Noise Ratio user set.

9. base station according to claim 8, is characterized in that, described circulation delay transmit diversity processing module comprises:

Circulation delay sample distribution module is used to the described described low set circulation delay sample of user assignment that belongs in low Signal to Interference plus Noise Ratio user set;

Circulation delay antenna assignment module is used to the described described low set circulation delay antenna of user assignment that belongs in low Signal to Interference plus Noise Ratio user set;

The antenna control module is used for according to described low set circulation delay sample, described low set circulation delay antenna being selected to control.

10. according to claim 8 or 9 described base stations, is characterized in that, also comprises:

Low Signal to Interference plus Noise Ratio user judge module is used for before described circulation delay transmit diversity processing module is processed, and judges whether the described current user who is in state of activation is in described low Signal to Interference plus Noise Ratio user gathers.

11. base station according to claim 8 is characterized in that, described user gathers the division module and also is used for described average Signal to Interference plus Noise Ratio is classified as high Signal to Interference plus Noise Ratio user set more than or equal to the described first user who suddenlys change threshold value; Described base station also comprises:

Feedback cycle arranges module, be used to the described current user who is in state of activation that the feedback cycle of described average Signal to Interference plus Noise Ratio is set, be in the feedback cycle of the user in described high Signal to Interference plus Noise Ratio user set greater than the feedback cycle that is in the user in described low Signal to Interference plus Noise Ratio user set;

Sending module is used for described current feedback cycle and the described current residing Signal to Interference plus Noise Ratio user of the user aggregate information that is in state of activation that is in the user of state of activation is sent to the described current user who is in state of activation.

12. base station according to claim 11 is characterized in that, also comprises:

Feedback cycle changes module, is used for changing described feedback cycle when the described current average Signal to Interference plus Noise Ratio that is in the user of state of activation changes;

Wherein, when described average Signal to Interference plus Noise Ratio becomes large, extend described feedback cycle; When described average Signal to Interference plus Noise Ratio diminishes, shorten described feedback cycle.

13. a multi-subscriber dispatching system is characterized in that described system comprises user receiving device and base station;

Wherein, described user receiving device comprises:

The Signal to Interference plus Noise Ratio detection module is for detection of the Signal to Interference plus Noise Ratio on self every antenna;

Average Signal to Interference plus Noise Ratio computing module is used for the average Signal to Interference plus Noise Ratio by the weighted factor calculating user of described every antenna;

Average Signal to Interference plus Noise Ratio feedback module is used for calculating average Signal to Interference plus Noise Ratio and feeding back to the base station described;

wherein, described base station is with described average Signal to Interference plus Noise Ratio and the first sudden change threshold of presetting, described average Signal to Interference plus Noise Ratio is classified as low Signal to Interference plus Noise Ratio user set less than the described first user who suddenlys change threshold value, and required basic number of transmit antennas when determining each user's proper communication, determine the first configurable antenna number of cyclic delay diversity transmitting antenna according to described basic number of transmit antennas, for being in the low set of user assignment circulation delay sample and the low set circulation delay antenna in described low Signal to Interference plus Noise Ratio user set, utilize described low set circulation delay sample and described low set circulation delay antenna to carry out the processing of circulation delay transmit diversity to the user who is in described low Signal to Interference plus Noise Ratio user set.

14. multi-subscriber dispatching according to claim 13 system is characterized in that, described user receiving device also comprises:

Periodic feedback trigger control module is used for the feedback cycle of sending out according to the average Signal to Interference plus Noise Ratio of self, controls described average Signal to Interference plus Noise Ratio feedback module and periodically current average Signal to Interference plus Noise Ratio is fed back to the base station.

15. multi-subscriber dispatching according to claim 13 system is characterized in that, described user receiving device also comprises:

Whether user's Set Status judging unit is used for before described Signal to Interference plus Noise Ratio detection module detects, judge self to be in low Signal to Interference plus Noise Ratio user set, in this way, carry out described detection; Otherwise, process ends.

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