CN103313408B

CN103313408B - A kind of more sector coordinated scheduling methods and device

Info

Publication number: CN103313408B
Application number: CN201210061744.5A
Authority: CN
Inventors: 罗薇; 刘锟; 鲁照华; 李卫敏
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2012-03-09
Filing date: 2012-03-09
Publication date: 2018-02-16
Anticipated expiration: 2032-03-09
Also published as: CN103313408A

Abstract

The invention provides a kind of more sector coordinated scheduling methods, including：Taken out successively in baseband pool according to dispatching priority and treat dispatch terminal, dispatch terminal is treated to each of taking-up, performs following operation：By currently treating signal quality value that dispatch terminal obtains on each idling-resource block to idling-resource block sequencing, by signal quality idling-resource block is taken out in turn from good to difference, judge whether to meet default distributive condition, if meet, then the idling-resource block is distributed to and described currently treats dispatch terminal, otherwise, continue to take out next idling-resource block and judged, current treat that dispatch terminal is assigned with idling-resource block or judges that all idling-resource blocks can not all be distributed to until to be described and described currently treat dispatch terminal.The present invention also provides a kind of more sector coordinated scheduling devices.

Description

A kind of more sector coordinated scheduling methods and device

Technical field

The present invention relates to the communications field, more particularly to a kind of OFDM (Orthogonal Frequency Division Multiplexing, referred to as OFDM) distributing antenna system in more sector coordinated scheduling methods and device.

Background technology

Coordinate multipoint (Coordinative Multiple Point, COMP) technology, that is, it is mutually only to refer to multiple geographical position Scattered transfer point is found to take for multiple terminals by different cooperation modes (such as joint transmission, Combined Treatment, cooperative scheduling) Business.Wherein, multiple transmission point can have the base station of full resource management module, baseband processing module and radio frequency unit, or Person is the multiple radio frequency units and antenna (such as spaced antenna) of geographical position inequality, or via node.

At OFDM (Orthogonal Frequency Division Multiplexing, referred to as OFDM) In system, in same sector, when base station carries out downlink data transmission with different terminals, because these downlinks are orthogonal , so, it can avoid disturbing in sector.However, the downlink between different sectors may not be orthogonal, therefore, often One terminal all may be by the descending interference from the base station of other adjacent sectors, i.e. inter-sector interference.If done between sector Disturb serious, then can reduce the transmittability of power system capacity, particularly sector-edge terminal, so influence the covering power of system with And the performance of terminal.In order to overcome inter-sector interference and ensure certain bandwidth availability ratio, the interference of time-frequency domain can be used to assist Conditioning technology, different sub-band resources are distributed into edge termination, to reduce inter-sector interference intensity.

Interference coordination dispatching method is the terminal that different sub-band resources are distributed to interference source each other, to reduce as far as possible Inter-cell interference intensity, but in traditional interference coordination dispatching method for each sector, simply by edge termination It is considered as the terminal of interference source each other, and the sub-band resources block for distributing to edge termination is fixed, is so ensureing adjacent sectors Edge termination distribution different sub-band resource block while also have lost the gain of frequency selectivity, and when load imbalance In the case of the wasting of resources be present.

The content of the invention

The technical problem to be solved in the present invention is to provide a kind of more sector coordinated scheduling methods and device, do not increased with reaching Add additional signaling overhead and ensure to realize interference coordination between sector under the premise of the flow of sector as far as possible, strengthening system covering Purpose.

In order to solve the above problems, the invention provides a kind of more sector coordinated scheduling methods, including：

Taken out successively in baseband pool according to dispatching priority and treat dispatch terminal, dispatch terminal is treated to each of taking-up, held The following operation of row：

By currently treating that signal quality value that dispatch terminal obtains on each idling-resource block to idling-resource block sequencing, presses Signal quality takes out idling-resource block in turn from good to difference, judges whether to meet default distributive condition, if it is satisfied, then will The idling-resource block distribute to it is described currently treat dispatch terminal, otherwise, continue to take out next idling-resource block and judged, directly Currently treat that dispatch terminal is assigned with idling-resource block or it is described to judge that all idling-resource blocks can not all be distributed to to be described Currently treat dispatch terminal.

Further, the above method can also have the characteristics that, described to judge whether to meet that default distributive condition includes：

Judge other sectors under same baseband pool whether on the idling-resource block currently taken out dispatch terminal, if do not had Have, then meet default distributive condition；

If at least one other sector under same baseband pool dispatch terminal on the idling-resource block currently taken out, Then：

Judge that this currently treats scheduling eventually when the idling-resource block currently taken out is distributed to currently when dispatch terminal Whether the interference for each terminal that end is dispatched to each sector under the baseband pool on the idling-resource block currently taken out Decline whether be less than or equal to signal quality thresholding less than or equal to signal quality caused by interference threshold or interference, if it is, Meet the default distributive condition, otherwise, be unsatisfactory for the default distributive condition.

If dispatch terminal is currently treated without cooperation sector, or, currently treat that dispatch terminal has cooperation sector, and currently wait to adjust The cooperation sector not dispatch terminal on the idling-resource block currently taken out of terminal is spent, then meets default distributive condition；

There is the dispatch terminal on the idling-resource block currently taken out if currently treating the cooperation sector of dispatch terminal, judge By the idling-resource block currently taken out distribute to it is described it is current when dispatch terminal when, this currently treats that dispatch terminal is each to its The interference of each terminal that cooperation sector is dispatched on the idling-resource block currently taken out whether be less than or equal to interference threshold or Signal quality caused by person's interference declines whether be less than or equal to signal quality thresholding, if it is, meeting the default distribution Condition, otherwise, it is unsatisfactory for the default distributive condition.

Further, the above method can also have the characteristics that methods described also includes：

Modulating-coding collection MCS corresponding to the channel quality indicator (CQI) that terminal is fed back in the serving sector of terminal is with giving MCS threshold values compare, be then far point edge termination if less than the MCS threshold values；

Otherwise, the serving sector of the terminal counts the Reference Signal Received Power RSRQ to adjacent sectors that the terminal reports Metrical information and the terminal compare difference between the two and given measurement to the RSRQ metrical informations of the serving sector Difference threshold, if less than the measurement difference threshold, then the adjacent sectors are the cooperation sector of the terminal；If the terminal does not have There is cooperation sector, then the terminal is inner ring terminal, is otherwise near point edge termination；

When terminal is far point edge termination or inner ring terminal, no cooperation sector, when terminal is near point edge termination, have Cooperate sector.

Further, the above method can also have the characteristics that, judge currently to treat dispatch terminal to working as follows Signal quality caused by the interference for the terminal dispatched on the idling-resource block of preceding taking-up declines whether be less than or equal to signal quality door Limit：

Calculate by the idling-resource block that currently takes out distribute and be not assigned to it is described when dispatch terminal when, it is described to work as The new signal mass value and original signal mass value for the terminal dispatched on the idling-resource block of preceding taking-up, according to the new signal mass value Overall spectrum variable quantity is obtained with original signal mass value, by the overall spectrum variable quantity and default overall spectrum variable quantity threshold value Compare, if less than equal to the overall spectrum variable quantity threshold value, then signal quality caused by disturbing is dropped by less than being equal to signal Quality threshold, otherwise, signal quality caused by interference, which declines, is more than signal quality thresholding.

Further, the above method can also have the characteristics that, the signal quality value is Signal to Interference plus Noise Ratio SINR value；

It is described to be included according to the new signal mass value and original signal mass value acquisition overall spectrum variable quantity：

Wherein, SINR_UEFor original signal mass value, NewSINR_UEFor new signal mass value, Δ SE_UEFor overall spectral efficiency Variable quantity.

The present invention also provides a kind of more sector coordinated scheduling devices, including：

Dispatching priority determining unit, for determining to treat the dispatching priority of dispatch terminal in baseband pool, according to the tune Degree priority is taken out successively treats dispatch terminal；

Resource block sequencing unit, treat dispatch terminal in each sky for what is currently taken out according to dispatching priority determining unit The signal quality value obtained on not busy resource block is to idling-resource block sequencing；

Scheduling unit, the free time is taken out in turn to difference from good according to signal quality for the sequence by resource block sequencing unit Resource block, judge whether to meet default distributive condition, if it is satisfied, then the idling-resource block is distributed into the dispatching priority What level determining unit was currently taken out treats dispatch terminal, otherwise, continues to take out next idling-resource block and is judged, until for institute That states that dispatching priority determining unit currently takes out treats that dispatch terminal is assigned with idling-resource block or judges all idling-resources What block can not all distribute to that the dispatching priority determining unit currently takes out treats dispatch terminal.

Further, said apparatus can also have the characteristics that, the scheduling unit judges whether full according to following manner The default distributive condition of foot：

Further, said apparatus can also have the characteristics that, described device also includes terminal type determining unit, is used for By the modulating-coding collection MCS corresponding to terminal feedback channel quality instruction CQI compared with given MCS threshold values, if less than institute MCS threshold values are stated, then are far point edge termination；Otherwise, the Reference Signal Received Power to adjacent sectors that the terminal reports is counted RSRQ metrical informations and the terminal to the RSRQ metrical informations of the serving sector, compare difference between the two with it is given Difference threshold is measured, if less than the measurement difference threshold, then the adjacent sectors are the cooperation sector of the terminal；If the end Without cooperation sector, then the terminal is inner ring terminal, is otherwise near point edge termination at end；

Currently when dispatch terminal is far point edge termination or inner ring terminal, no cooperation sector；Currently treat that dispatch terminal is During near point edge termination, there is cooperation sector.

Further, said apparatus can also have the characteristics that, the scheduling unit judges currently to wait to adjust as follows Whether signal quality caused by the interference of terminal that degree terminal-pair is dispatched on the idling-resource block currently taken out declines is less than etc. In signal quality thresholding：

Further, said apparatus can also have the characteristics that, the signal quality value is Signal to Interference plus Noise Ratio SINR value；

The scheduling unit obtains overall spectrum variable quantity according to the new signal mass value and original signal mass value to be included：

The present invention can be with the advantage of shared terminal feedback information using sector in baseband pool, will be all in whole baseband pool The terminal of sector carries out unified priority ranking, and the high terminal of priority is first dispatched, and is dispatched after the relatively low terminal of priority, Need to consider the optimal of itself and the terminal interference sufficiently small two higher to priority when scheduling selection resource block Item factor.And the priority ranking of existing technology terminal is only limited among this sector, also do not estimated when scheduling To interference caused by the terminal possibility of other sectors, and it is simply forced in given part resource according to the different type of terminal Selected, to have the function that AF panel, to lack flexibility in block.Interference can be estimated by the present invention, ensured preferentially The high terminal distribution of level causes to disturb stronger terminal each other between cooperation sector as far as possible on the premise of best resource blocks The frequency subband resource differed is assigned to, to reach interference coordination, improves the frequency spectrum of overall spectral efficiency and edge termination The purpose of efficiency.

Brief description of the drawings

Fig. 1 is the entire flow figure of 1 system distribution resource allocation method according to embodiments of the present invention；

Fig. 2 is that terminal distribution RB (Resource Block, resource block) resource block is given according to embodiments of the present invention 1 sector Particular flow sheet；

Fig. 3 is according to embodiments of the present invention 1 unscheduled RB distribution scene；

Fig. 4 is particular flow sheet of 3 sector according to embodiments of the present invention to terminal distribution RB；

Fig. 5 is the more sector coordinated scheduling device block diagrams of the embodiment of the present invention.

Embodiment

Describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that do not conflicting In the case of, the feature in embodiment and embodiment in the application can be mutually combined.

Because the total transmission power of terminal has the upper limit, therefore the transmitting antenna number of terminal is more, averagely to every hair The transmission power of antenna is penetrated with regard to smaller, thus terminal when using single-antenna transmission than multi-antenna transmission when the power that can use will Greatly, in order to strengthen up-link coverage as far as possible, while the complexity that system is realized also is reduced, the terminal in the present invention Data are sent using single antenna.

By the present invention, all base stations are divided into several baseband pools by system, and the sector in same baseband pool can be with The feedback information of shared schedule information and terminal measurement, the setting of baseband pool is changeable, such as, can by a base station or Three sectors under different base station are considered as a baseband pool, and for example, can be by being total under seven adjacent base stations of geographical position 21 sectors are considered as a baseband pool.The maximum sector number that baseband pool includes does not limit, depending on baseband pool disposal ability It is fixed, because the sector schedule information in baseband pool and terminal measurement feedack can be shared, therefore can be by a base United Dispatching is carried out with the terminal in pond.

Each weights for treating dispatch terminal, the CQI that each sector can feed back according to terminal are calculated first (Channel Quality Information, channel quality indication (CQI) information) calculates weights, then same baseband pool Under sector share the weights information of all terminals, carry out overall sequence, according to the sequence, be followed successively by terminal distribution tune Resource is spent, meanwhile, needing to estimate the terminal when to terminal distribution resource can be to scheduled after the scheduling of resource Interference caused by terminal, if interference is excessive so that under the signal quality (can be described with Signal to Interference plus Noise Ratio) of scheduled terminal Drop ratio exceedes certain threshold value, then can not be allocated to the terminal distribution resource, it is necessary to change other resource blocks；It is no Then, the resource allocation can be given to the terminal.

Wherein, terminal before some resource block is dispatched, it is necessary to estimate to the every other sector under same baseband pool The scheduled interference of the terminal of same resource block, if on the resource block, adjacent sectors also without dispatching distribution to terminal, Disturbed condition need not then be considered, that is to say, that because the higher terminal of priority is more first dispatched, it is necessary to consider to do other-end Situation about disturbing is fewer, and constraint is fewer, is more possible to choose optimal resource block, and scheduling point after the low terminal of priority Match somebody with somebody, due to the terminal of dispatching distribution before, then terminal needs to consider that the interference to other-end is more, optional money Source block is fewer.

Another way is not consider the terminal under same baseband pool in every other sector same resource block one by one Interference, can selectively consider the interference to partial sector, specifically：

The measurement result that each sector under baseband pool can report according to terminal determines the cooperation sets of sectors of terminal, false It is U to determine terminal, and its serving sector is S, metrical information the meets certain condition and sector under same baseband pool for N1, N2, N3 }, then U cooperation sets of sectors is { N1, N2, N3 }, if according to certain rule, judges terminal U cooperation set of sectors Element in conjunction only has one, i.e. only serving sector, then the terminal is inner ring terminal, on the contrary then be edge termination.If adjust The terminal of degree is inner ring terminal, then need not consider the interference of the terminal-pair other-end, if terminal is edge termination, then , it is necessary to estimate the interference that its sector that cooperates of the terminal-pair has determined the terminal of scheduling before dispatching the terminal.Wherein, edge is whole End further comprises near point edge termination and far point edge termination.When sector number in baseband pool is more, such as there are three layers Totally 57 sectors, this method can reduce amount of calculation.

The embodiment of the present invention provides a kind of more sector coordinated scheduling methods, including：

Wherein, judged whether to meet default distributive condition according to following manner：

Wherein, the cooperation sector of terminal can use various ways to determine, a kind of mode is as follows：

The serving sector of terminal by the modulating-coding collection MCS that terminal is fed back compared with given MCS threshold values, if less than institute MCS threshold values are stated, then are far point edge termination；

When terminal is far point edge termination and inner ring terminal, no cooperation sector, when terminal is near point edge termination, have Cooperate sector.

Wherein, judge current to treat dispatch terminal to the terminal dispatched on the idling-resource block currently taken out as follows Interference whether be less than or equal to interference threshold：

Calculate by the idling-resource block that currently takes out distribute and be not assigned to it is described when dispatch terminal when, it is described to work as The new signal mass value and original signal mass value for the terminal dispatched on the idling-resource block of preceding taking-up, according to the new signal mass value A related variable quantity is obtained to original signal mass value, such as, overall spectrum variable quantity, by the overall spectrum variable quantity with presetting Overall spectrum variable quantity threshold value compare, if less than equal to the overall spectrum variable quantity threshold value, then signal caused by disturbing Quality Down is less than or equal to signal quality thresholding, and otherwise, signal quality caused by interference, which declines, is more than signal quality thresholding.It is overall Spectral change amount is merely illustrative, can also be judged according to the other values that new signal mass value and original signal mass value generate.

Wherein, the signal quality value is Signal to Interference plus Noise Ratio SINR value；

Wherein, SINR_UEFor original signal mass value, NewSINR_UEFor new signal mass value, Δ SE_UEFor overall spectral efficiency Variable quantity.Signal quality value can also use the value of other energy gauge signal qualities in addition to SINR, and this is not limited by the present invention.

Embodiment 1

According to embodiments of the present invention, there is provided in a kind of distributing antenna system, sector interference coordination is dispatched in baseband pool Method and flow, referring to accompanying drawing 1, specific implementation step includes：

Step S101, sector coordinated scheduling update cycle T1 in system configuration baseband pool.T1 does not update baseband pool in the cycle Interior sector schedule information；

Step S102, MCS (Modulating and Coding Set, the tune of the feedback of each serving sector statistics terminal Coded set processed) information and RSRQ (Reference Signal Received Power, Reference Signal Received Power) measurement letter Breath, determine the type and cooperation sets of sectors of terminal.Specific method is as follows：

The MCS information of the feedback of serving sector statistics terminal, compare the MCS and the size of given MCS threshold values of feedback, such as Fruit is less than given MCS threshold values, then is far point edge termination, otherwise needs to determine whether, specific as follows：

The RSRQ metrical informations and terminal to adjacent sectors that serving sector statistics terminal reports arrive serving sector RSRQ metrical informations, compare the size of difference and given measurement difference threshold between the two, it is given will to meet that difference is less than Measurement difference threshold sector index be added to cooperation list of sectors in；If the element in the list of sectors that cooperates is sky, Terminal is inner ring terminal, is otherwise near point edge termination, and the sector in the list of sectors that cooperates is the near point edge termination COMP Set sectors；

Wherein, also terminal type and association can be determined according to geographical position by base station come the geographical position of positioning terminal Make sector.

Step S103, in each serving sector Sector (j) statistics dispatching cycle in the past on each frequency subband by The disturbed condition Rnn (j, k) of UE outside to the sets of sectors in this baseband pool, outside sets of sectors in this baseband pool Instantaneous interference channel can not obtain, so Rnn (j, k) can only use long-time statistical average valueCome approximate：

Wherein：

Trace is Matrix Calculating mark operator；

For Sector (j) the total interference being subject on RB (k) and the autocorrelation matrix of noise；

Disturbed for Sector (j) other sectors UE in CoMP set being subject on RB (k) With the autocorrelation matrix of noise；Wherein I subtracts 1 equal to CoMP set number；

RxNum represents reception antenna number；

Due in actual environment receiving terminal by CoMP set outside interference channel coefficient can not know, soInformation can not directly obtain.But can be obtained by the way that above method is approximate,As Rnn (j, k) value；

Step S104, terminals to be scheduled all to all sectors in baseband pool carry out priority ranking, it is determined that adjusting at first The UEi of the terminal of degree, for example, Sector2；

Specifically, proportionally priority ranking can be carried out by fair scheduling algorithm；

Step S105, with reference to UE (i) transmission power, signal matter of the estimation UE (i) on each idling-resource block RB (k) Amount, specifically, SINR (Signal to Interference plus Noise Ratio, signal and interference plus noise can be used Ratio, abbreviation Signal to Interference plus Noise Ratio) gauge signal quality, it is of course also possible to using other specification gauge signal quality, the present invention is to this It is not construed as limiting.It is assumed to be SINR_{UE (i), RB (k)}, a kind of computational methods are：

Step S106, by SINRs of the UE (i) on each RB_{UE (i), RB (k)}Descending sequence, and by corresponding RB indexes Number it is stored in TmpSchd_UE11In；

Step S107, from TmpSchd_UE(i)It is middle to take out first index, it is assumed that to be RB (k), referring to accompanying drawing 2, according to step S108 and S109 determines whether resource block RB (k) distributing to UE (i)；

Step S108, first determine whether UE (i) is inner ring terminal or far point edge termination, be then by RB (k) resources UE (i) is distributed to, into step S110, otherwise into step S109；

Step S109, UE (i) are near point edge termination, judge whether the sector in its CoMP set dispatches on RB (k) Terminal, resource block RB (k) is then distributed into UE (i) without dispatch terminal；If the sector in its CoMP set in RB (k) up to A rare sector scheduled terminal in RB (k), then needs to consider UE (i) introducing for scheduled according to below step The influence of the spectrum efficiency of terminal：

Due to co-channel interference caused by UE (i), the SINR of scheduled terminal can be reduced on RB (k), it is assumed that in RB (k) scheduled terminal is Sector1 UE1 on, then SINR new UE1 is NewSINR_{UE1, RB (k)}；

Wherein,The Rnn values being calculated for UE1 when not by co-channel interference caused by UE (i), wherein May it is included other with the UE of distribution co-channel interference.H_RB(k)Represent equivalent channel coefficient value；

SINR original UE1 is SINR on RB (k)_{UE1, RB (k)}；

UE1 is on RB (k) because UE (i) presence causes the variation delta SE of overall spectral efficiency_UE1；

As Δ SE_UE1During given less than or equal to one threshold value, then RB (k) resource allocations are then performed to UE (i) Step S110；

As Δ SE_UE1During given more than one threshold value, then by RB (k) from TmpSchd_UE(i)Delete, and return in set Receipt row step S107；If all of the Δ SE on RB (k)_UE1A both greater than given threshold value, then the terminal can not adjust Degree, is transferred to step S111；

After step S110, UE (i) successful dispatch resource block RB (k), Rnn value of other sectors on RB (k) is updated, i.e.,

Step S111, UE (i) is deleted in dispatch terminal set is treated, if treating dispatch terminal set non-NULL, return is held Row step S104；If treating that dispatch terminal collection is combined into sky, need to judge whether all RB dispatch completely, if complete scheduling Step S113 is performed, otherwise performs step S112；

Step S112, the UE dispatched on the RB for the RB indexes front and back do not dispatched is found, judges whether the UE fits Conjunction uses the RB resources.Unscheduled RB distribution scene is as shown in Figure 3.Wherein, UEa and UEb is unscheduled RB regions both sides Dispatch terminal, RB1 ..., RBn are unscheduled RB.

Unscheduled RB processing schemes comprise the following steps that：

Obtain unscheduled RB set；

Unscheduled RB gathers dividing subset, and multiple continuous unscheduled RB are a subset；

Unscheduled RB subsets are handled, it is assumed that current unscheduled RB subsets are (RB1, RB2 ..., RBn-1, RBn)；

From top to bottom, set and attempt scheduling RB set (RB1, RB2 ..., RBn-1, RBn)：UEa attempts scheduling RB1, sentences It is disconnected whether to dispatch, if can dispatch, it tries scheduling RB1 and RB2, the like, if some RB can not be dispatched, Thereafter RB is no longer attempt to dispatch；Preserve the Δ SE result of calculations attempted in scheduling process；

From the bottom up, set and attempt scheduling RB set (RBn, RBn-1 ..., RB2, RB1)：UEb attempts scheduling RBn, sentences It is disconnected whether to dispatch, if can dispatch, it tries scheduling RBn and RBn-1, the like, if some RB can not be dispatched, Then RB thereafter is no longer attempt to dispatch；Preserve the Δ SE result of calculations attempted in scheduling process；

If UEa and UEb can dispatch some RB, the RB is distributed to terminal corresponding to less Δ SE；

If UEa and UEb can not dispatch some RB, the RB is deleted from unscheduled RB subsets.

Judge whether there are remaining unscheduled RB subsets in unscheduled RB set, if so, then return execution step S112, no Then terminate.

Wherein, judge that the idiographic flow whether RBk can dispatch is as follows：

A) because UEa (UEb) is after RBk raises degrees of data, interference is generated to dispatch terminals of the Sector1 on RBk. Assuming that dispatch terminals of the Sector1 on RBk is UE1, then UE1 considers that the SINR after UEa (UEb) interference is：

B) the spectrum efficiency change that Sector1 dispatches terminal UE 1 on RBk is calculated：

If c) Δ SE_UE1Less than or equal to given threshold value, then RBk can be distributed to UEa (UEb), otherwise, can not With distribution；

Step S113, complete scheduling and exit schduling cycle.

Interference can be estimated by this method, ensureing premise of the high terminal distribution of priority to best resource blocks Under, cause to disturb stronger terminal distribution each other to the frequency subband resource differed between cooperation sector as far as possible, with up to To interference coordination, the purpose of overall spectral efficiency and the spectrum efficiency of edge termination is improved, while terminal is classified, only The influence of near point edge termination is considered, to reach the purpose for the speed for improving algorithm.

Embodiment 2

According to embodiments of the present invention, there is provided in a kind of ofdm system, three fans under same base station Area carries out the method and flow of interference coordination scheduling, and specific implementation step includes：

Step S201, sector coordinated scheduling update cycle T1 in system configuration baseband pool.Same base is not updated in the T1 cycles The schedule information of three sectors under standing；

Step S202, the MCS information and RSRQ metrical informations of the feedback of each serving sector statistics terminal, determines terminal Type.Specific method is as follows：

The MCS information of the feedback of serving sector statistics terminal, compares the MCS of feedback and the size of given threshold value, if small In given threshold value, then it is far point edge termination, otherwise needs to determine whether, it is specific as follows：

The RSRQ metrical informations and terminal to two neighboring sector that serving sector statistics terminal reports are to serving sector RSRQ metrical informations, compare the size of difference and given threshold value between the two, will meet that measured value difference is less than given threshold The sector index of value is added in cooperation list of sectors；If it is sky to cooperate with the element in list of sectors, terminal is that inner ring is whole End, is otherwise near point edge termination, and the sector in the list of sectors that cooperates is the COMP Set sectors of the near point edge termination, Generally, for three sector systems, the cooperation sector of near point edge termination is 1, up to 2；

Step S203, in each serving sector Sector (j) statistics dispatching cycle in the past on each frequency subband by The disturbed condition Rnn (j, k) of UE outside to three sectors under this base station, due to instantaneous outside this sets of sectors of base station three Interference channel can not obtain, so Rnn (j, k) can only use the average value of long-time statisticalIt is next approximate, and due to this base Instantaneous interference channel in base station outside three sectors can not obtain, and the instantaneous interference channel of three sectors can obtain in this base station , it is possible to by measure obtain total Rnn_Total subtract this base station section set within instantaneous interference Rnn_inner it is near Seemingly obtain the Rnn outside baseband pool sets of sectors；

Wherein,

Trace is Matrix Calculating mark operator；

For what Sector (j) was subject on RB (k) serving sector is removed in three sectors under this base station Outside other two sector UE interference and the autocorrelation matrix of noise；I=2；

RxNum represents reception antenna number；

Step S204, to all terminals to be scheduled in three sectors in base station, proportionally fair scheduling algorithm enters row major Level sequence, it is determined that the UE (i) of the terminal dispatched at first, for example, Sector2；

Step S205, with reference to UE (i) transmission power, estimation UE (i) can be obtained on each idling-resource block RB (k) SINR value, it is assumed that be SINR_{UE (i), RB (k)}；

Step S206, by SINRs of the UE (i) on each RB_{UE (i), RB (k)}Descending sequence, and by corresponding RB indexes Number it is stored in TmpSchd_UE11In；

Step S207, from TmpSchd_UE(i)It is middle to take out first index, it is assumed that to be RB (k), according to step S108 and S109 Determine whether RB (k) resource allocations to UE (i)；

Step S208, first determine whether UE (i) is inner ring terminal or far point edge termination, be then by RB (k) resources UE (i) is distributed to, into step S110, otherwise into step S109；

Step S209, UE (i) are near point edge termination, judge that other two sectors are either with or without on RB (k) under same base station Dispatch terminal, without dispatch terminal then by RB (k) resource allocations to UE (i)；If with least one fan of the sector under base station Area scheduled terminal in RB (k), then needs to consider UE (i) frequency spectrum of the introducing for scheduled terminal according to below step The influence of efficiency；

Due to co-channel interference caused by UE (i), the SINR of scheduled terminal can be reduced on RB (k), it is assumed that terminal For Sector1 UE1, then SINR new UE1 is NewSINR_{UE1, RB (k)}；

SINR original UE1 is SINR on RB (k)_{UE1, RB (k)}

As Δ SE_UE1During given less than or equal to one threshold value, then RB (k) resource allocations are then performed to UE (i) Step S210；

As Δ SE_UE1During given more than one threshold value, then by RB (k) from TmpSchd_UE(i)Delete, and return in set Receipt row step S207；If all of the Δ SE on RB (k)_UE1A both greater than given threshold value, then the terminal can not adjust Degree, is transferred to step S211；

After step S210, UE (i) successful dispatch resource block RB (k), Rnn value of other sectors on RB (k) is updated, i.e.,：

Step S211, UE (i) is deleted in scheduling set, if treating dispatch terminal set non-NULL, return and perform step S104；If treating that dispatch terminal collection is combined into sky, need to judge whether all RB dispatch completely, step is performed if complete scheduling Rapid S213, otherwise perform step S212；

Step S212, the UE dispatched on the RB for the RB indexes front and back do not dispatched is found, judges whether the UE fits Conjunction uses the RB resources.UE above properly then distributes to UE above, and UE below properly then distributes to UE below, if It is all suitable, then compare both priority according to proportional fair scheduling, which which priority higher position gives；Judging RB is No suitable UE method has many kinds, and simplest method is then to judge whether UE needs more scheduling resources.

Step S213, complete scheduling and exit schduling cycle.

The present embodiment only considers the situation that three sectors are coordinated in base station, and algorithm is succinct, it is easy to accomplish.

Embodiment 3

According to embodiments of the present invention, there is provided in a kind of ofdm system, three fans under same base station Area carries out the method and flow of interference coordination scheduling, and with reference to Fig. 4, specific implementation step includes：

Step S401, sector coordinated scheduling update cycle T1 in system configuration baseband pool.Same base is not updated in the T1 cycles The schedule information of three sectors under standing；After dispatching update cycle arrival, step S402 is performed；

Step S402, each serving sector Sector (j), (j=1,2,3) count each frequency in a dispatching cycle in the past By the disturbed condition Rnn (j, k) of the UE outside three sectors under this base station, (j represents sector, and k represents frequency on rate subband Subband), because the instantaneous interference channel outside this sets of sectors of base station three can not obtain, so Rnn (j, k) can only be used for a long time The average value of statisticsIt is next approximate, and because the instantaneous interference channel outside three sectors in this base station can not obtain, and this The instantaneous interference channel of three sectors can be obtained in base station, it is possible to measurement is obtained into total Rnn_Total and subtracts this base station Instantaneous interference Rnn_inner approximations within sets of sectors obtain the Rnn outside baseband pool sets of sectors；

Wherein,

Trace is Matrix Calculating mark operator；

RxNum represents reception antenna number；

Step S404, to all terminals to be scheduled in three sectors in base station, proportionally fair scheduling algorithm enters row major Level sequence, it is determined that the UE (i) of the terminal dispatched at first, for example, Sector2；

Step S405, with reference to UE (i) transmission power, estimation UE (i) can be obtained on each idling-resource block RB (k) SINR value, it is assumed that be SINR_{UE (i), RB (k)}；

Step S406, by SINRs of the UE (i) on each RB_{UE (i), RB (k)}Descending sequence, and by corresponding RB indexes Number it is stored in TmpSchd_UE11In；

Step S407, from TmpSchd_UE(i)It is middle to take out first index, it is assumed that be RB (k), judge under same base station other two Individual sector is either with or without the dispatch terminal on RB (k), without dispatch terminal then by RB (k) resource allocations to UE (i)；If same base station Under at least one sector of sector scheduled terminal in RB (k), then need according to below step consider UE (i) introducing for The influence of the spectrum efficiency of scheduled terminal；

Due to co-channel interference caused by UE (i), the SINR of scheduled terminal can be reduced on RB (k), it is assumed that terminal For Sector1 UE1, then SINR new UE1 is NewSINR_{UE1, RB (k)}：

SINR original UE1 is SINR on RB (k)_{UE1, RB (k)}

As Δ SE_UE1During given less than or equal to one threshold value, then RB (k) resource allocations are then performed to UE (i) Step S408；

As Δ SE_UE1During given more than one threshold value, then by RB (k) from TmpSchd_UE(i)Delete, and return in set Receipt row step S407；If all of the Δ SE on RB (k)_UE1A both greater than given threshold value, then the terminal can not adjust Degree, is transferred to step S409；

After step S408, UE (i) successful dispatch resource block RB (k), Rnn value of other sectors on RB (k) is updated, i.e.,

Step S409, after UE (i) is deleted in dispatch terminal set, judge when dispatch terminal set non-NULL, then return Receipt row step S404；If treating that dispatch terminal collection is combined into sky, need to judge whether all RB dispatch completely, if adjusted completely Degree then performs step S411, otherwise performs step S410；

Step S410, the UE dispatched on the RB for the RB indexes front and back do not dispatched is found, judges whether the UE fits Conjunction uses the RB resources.UE above properly then distributes to UE above, and UE below properly then distributes to UE below, if It is all suitable, then compare both priority according to proportional fair scheduling, which which priority higher position gives；Judging RB is No suitable UE method has many kinds, and simplest method is then to judge whether UE needs more scheduling resources.

Step S411, complete scheduling and exit schduling cycle.

The present embodiment only considers the situation that three sectors are coordinated in base station, and also terminal is not classified, algorithm letter It is clean, it is easy to accomplish.Interference can be estimated by this method, before the high terminal distribution of guarantee priority to best resource blocks Put, cause to disturb stronger terminal distribution each other to the frequency subband resource differed between cooperation sector as far as possible, with Reach interference coordination, improve the purpose of overall spectral efficiency and the spectrum efficiency of edge termination.

It should be noted that alternatively, each configuration information in examples detailed above can be provided by agreement into Row default configuration, or by upper layer network element match somebody with somebody and postpone notice base station.The upper layer network element can be trunking, base station control Device processed, access service network, connection service network, core network gateway etc..

In addition, above-mentioned multiple examples be applied to up (transmitting terminal is terminal, and receiving terminal is base station) communication system and The scheduling of resource of descending (transmitting terminal is base station, and receiving terminal is terminal) communication system.

The embodiment of the present invention also provides a kind of more sector coordinated scheduling devices, as shown in figure 5, including：

Dispatching priority determining unit, for determining the dispatching priority of terminal to be scheduled in baseband pool, according to described Dispatching priority takes out terminal to be scheduled successively；

Resource block sequencing unit, for according to the terminal that dispatching priority determining unit is currently taken out in each idling-resource The signal quality value obtained on block is to idling-resource block sequencing；

Scheduling unit, the free time is taken out in turn to difference from good according to signal quality for the sequence by resource block sequencing unit Resource block, judge whether to meet default distributive condition, if it is satisfied, then the idling-resource block is distributed into the dispatching priority The terminal currently taken out of level determining unit, otherwise, continue to take out next idling-resource block and judged, until for the scheduling The terminal distribution that priority determining unit is currently taken out idling-resource block judges that all idling-resource blocks can not all distribute The terminal currently taken out to the dispatching priority determining unit.

Wherein, the scheduling unit judges whether to meet default distributive condition according to following manner：

Wherein, described device also includes terminal type determining unit, for terminal feedback channel quality to be indicated into CQI institutes are right The modulating-coding collection MCS answered is then far point edge termination if less than the MCS threshold values compared with given MCS threshold values；It is no Then, count that the terminal reports to the Reference Signal Received Power RSRQ metrical informations of adjacent sectors and the terminal to the clothes The RSRQ metrical informations of business sector, compare difference between the two and given measurement difference threshold, if less than the measurement Difference threshold, then the adjacent sectors are the cooperation sector of the terminal；The sector if terminal does not cooperate, the terminal are inner ring Terminal, it is otherwise near point edge termination；

Wherein, the scheduling unit judges currently to treat dispatch terminal in the idling-resource block currently taken out as follows Signal quality caused by the interference of the terminal of upper scheduling declines whether be less than or equal to signal quality thresholding：

In summary, provided by the embodiment of the present invention in a kind of distributing antenna system, more sectors carry out coordinated scheduling Scheme, realized on the premise of not increasing additional signaling overhead and ensureing sector flow and fairness as far as possible sector it Between interference coordination, improve the flow of edge termination.Also, the technical scheme of the embodiment of the present invention for the existing network architecture and Existing flow etc. is not changed, it is easy to accomplish and promote, there is stronger industrial usability.

Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general Computing device realize that they can be concentrated on single computing device, or be distributed in multiple computing devices and formed Network on, alternatively, they can be realized with the program code that computing device can perform, it is thus possible to they are stored Performed in the storage device by computing device, and in some cases, can be with different from shown in order execution herein The step of going out or describing, they are either fabricated to each integrated circuit modules respectively or by multiple modules in them or Step is fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hardware and software combination.

The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies Change, equivalent substitution, improvement etc., should be included in the scope of the protection.

Claims

A kind of 1. more sector coordinated scheduling methods, it is characterised in that including：

Taken out successively in baseband pool according to dispatching priority and treat dispatch terminal, dispatch terminal is treated to each of taking-up, performed such as Lower operation：

By signal quality value that dispatch terminal obtains on each idling-resource block is currently treated to idling-resource block sequencing, by signal Quality takes out idling-resource block in turn from good to difference, judges whether to meet default distributive condition, if it is satisfied, then by the sky Not busy resource block distribute to it is described currently treat dispatch terminal, otherwise, continue to take out next idling-resource block and judged, Zhi Daowei It is described currently to treat that dispatch terminal is assigned with idling-resource block or it is described current to judge that all idling-resource blocks all be distributed to Treat dispatch terminal；

It is described to judge whether to meet that default distributive condition includes：

Judge other sectors under same baseband pool whether on the idling-resource block currently taken out dispatch terminal, if not provided, Then meet default distributive condition；

If at least one other sector under same baseband pool dispatch terminal on the idling-resource block currently taken out,：

Judge that this currently treats dispatch terminal pair when the idling-resource block currently taken out is distributed to currently when dispatch terminal Whether the interference for each terminal that each sector under the baseband pool is dispatched on the idling-resource block currently taken out is less than Decline whether be less than or equal to signal quality thresholding equal to signal quality caused by interference threshold or interference, if it is, meeting The default distributive condition, otherwise, it is unsatisfactory for the default distributive condition；

Or

It is described to judge whether to meet that default distributive condition includes：

If dispatch terminal is currently treated without cooperation sector, or, currently treat that dispatch terminal has cooperation sector, and currently treat scheduling eventually The cooperation sector at the end not dispatch terminal on the idling-resource block currently taken out, then meet default distributive condition；

There is the dispatch terminal on the idling-resource block currently taken out if currently treating the cooperation sector of dispatch terminal, judge inciting somebody to action The idling-resource block currently taken out is distributed to described current when dispatch terminal, and this currently treats dispatch terminal to its each cooperation Whether the interference for each terminal that sector is dispatched on the idling-resource block currently taken out is less than or equal to interference threshold or dry Signal quality declines whether be less than or equal to signal quality thresholding caused by disturbing, if it is, meet the default distributive condition, Otherwise, it is unsatisfactory for the default distributive condition.
2. the method as described in claim 1, it is characterised in that methods described also includes：

Modulating-coding collection MCS and given MCS corresponding to the channel quality indicator (CQI) that terminal is fed back in the serving sector of terminal Threshold value compares, and is then far point edge termination if less than the MCS threshold values；

Otherwise, the serving sector of the terminal counts the Reference Signal Received Power RSRQ to adjacent sectors that the terminal reports and measured Information and the terminal compare difference between the two and given measurement difference to the RSRQ metrical informations of the serving sector Threshold value, if less than the measurement difference threshold, then the adjacent sectors are the cooperation sector of the terminal；If the terminal is not assisted Make sector, then the terminal is inner ring terminal, is otherwise near point edge termination；

When terminal is far point edge termination or inner ring terminal, no cooperation sector, when terminal is near point edge termination, there is cooperation Sector.
3. the method as described in claim 1, it is characterised in that

Judge currently to treat that the interference of terminal of the dispatch terminal to dispatching on the idling-resource block currently taken out is led as follows The signal quality of cause declines whether be less than or equal to signal quality thresholding：

Calculate by the idling-resource block that currently takes out distribute and be not assigned to it is described when dispatch terminal when, it is described currently to take The new signal mass value and original signal mass value for the terminal dispatched on the idling-resource block gone out, according to the new signal mass value and original Signal quality value obtains overall spectrum variable quantity, by the overall spectrum variable quantity and default overall spectrum variable quantity threshold value ratio Compared with if less than equal to the overall spectrum variable quantity threshold value, then signal quality caused by disturbing is dropped by less than being equal to signal matter Thresholding is measured, otherwise, signal quality caused by interference, which declines, is more than signal quality thresholding.
4. method as claimed in claim 3, it is characterised in that the signal quality value is Signal to Interference plus Noise Ratio SINR value；

It is described to be included according to the new signal mass value and original signal mass value acquisition overall spectrum variable quantity：

<mrow> <msub> <mi>&Delta;SE</mi> <mrow> <mi>U</mi> <mi>E</mi> </mrow> </msub> <mo>=</mo> <mfrac> <mrow> <mi>l</mi> <mi>o</mi> <mi>g</mi> <mrow> <mo>(</mo> <mn>1</mn> <mo>+</mo> <msub> <mi>SINR</mi> <mrow> <mi>U</mi> <mi>E</mi> </mrow> </msub> <mo>)</mo> </mrow> <mo>-</mo> <mi>l</mi> <mi>o</mi> <mi>g</mi> <mrow> <mo>(</mo> <mn>1</mn> <mo>+</mo> <msub> <mi>NewSINR</mi> <mrow> <mi>U</mi> <mi>E</mi> </mrow> </msub> <mo>)</mo> </mrow> </mrow> <mrow> <mi>l</mi> <mi>o</mi> <mi>g</mi> <mrow> <mo>(</mo> <mn>1</mn> <mo>+</mo> <msub> <mi>SINR</mi> <mrow> <mi>U</mi> <mi>E</mi> </mrow> </msub> <mo>)</mo> </mrow> </mrow> </mfrac> </mrow>

Wherein, SINR_UEFor original signal mass value, NewSINR_UEFor new signal mass value, Δ SE_UEChange for overall spectral efficiency Amount.
A kind of 5. more sector coordinated scheduling devices, it is characterised in that including：

Dispatching priority determining unit, it is excellent according to the scheduling for determining to treat the dispatching priority of dispatch terminal in baseband pool First level is taken out successively treats dispatch terminal；

Resource block sequencing unit, treat dispatch terminal in each idle money for what is currently taken out according to dispatching priority determining unit The signal quality value obtained in source block is to idling-resource block sequencing；

Scheduling unit, idling-resource is taken out in turn to difference from good according to signal quality for the sequence by resource block sequencing unit Block, judge whether to meet default distributive condition, if it is satisfied, then it is true that the idling-resource block is distributed into the dispatching priority What order member was currently taken out treats dispatch terminal, otherwise, continues to take out next idling-resource block and is judged, until for the tune What degree priority determining unit was currently taken out treats that dispatch terminal is assigned with idling-resource block or judges all idling-resource blocks all Can not distribute to that the dispatching priority determining unit currently takes out treats dispatch terminal；

The scheduling unit judges whether to meet default distributive condition according to following manner：

Judge other sectors under same baseband pool whether on the idling-resource block currently taken out dispatch terminal, if not provided, Then meet default distributive condition；

If at least one other sector under same baseband pool dispatch terminal on the idling-resource block currently taken out,：

Judge that this currently treats dispatch terminal pair when the idling-resource block currently taken out is distributed to currently when dispatch terminal Whether the interference for each terminal that each sector under the baseband pool is dispatched on the idling-resource block currently taken out is less than Decline whether be less than or equal to signal quality thresholding equal to signal quality caused by interference threshold or interference, if it is, meeting The default distributive condition, otherwise, it is unsatisfactory for the default distributive condition；

Or the scheduling unit judges whether to meet default distributive condition according to following manner：

If dispatch terminal is currently treated without cooperation sector, or, currently treat that dispatch terminal has cooperation sector, and currently treat scheduling eventually The cooperation sector at the end not dispatch terminal on the idling-resource block currently taken out, then meet default distributive condition；

There is the dispatch terminal on the idling-resource block currently taken out if currently treating the cooperation sector of dispatch terminal, judge inciting somebody to action The idling-resource block currently taken out is distributed to described current when dispatch terminal, and this currently treats dispatch terminal to its each cooperation Whether the interference for each terminal that sector is dispatched on the idling-resource block currently taken out is less than or equal to interference threshold or dry Signal quality declines whether be less than or equal to signal quality thresholding caused by disturbing, if it is, meet the default distributive condition, Otherwise, it is unsatisfactory for the default distributive condition.
6. device as claimed in claim 5, it is characterised in that described device also includes terminal type determining unit, for inciting somebody to action Modulating-coding collection MCS corresponding to terminal feedback channel quality instruction CQI is compared with given MCS threshold values, if less than described MCS threshold values, then it is far point edge termination；Otherwise, the Reference Signal Received Power to adjacent sectors that the terminal reports is counted RSRQ metrical informations and the terminal compare difference between the two and given measurement to the RSRQ metrical informations of serving sector Difference threshold, if less than the measurement difference threshold, then the adjacent sectors are the cooperation sector of the terminal；If the terminal does not have There is cooperation sector, then the terminal is inner ring terminal, is otherwise near point edge termination；

Currently when dispatch terminal is far point edge termination or inner ring terminal, no cooperation sector；Currently treat that dispatch terminal is near point During edge termination, there is cooperation sector.
7. device as claimed in claim 5, it is characterised in that

The scheduling unit judges currently to treat as follows dispatch terminal to being dispatched on the idling-resource block currently taken out Signal quality caused by the interference of terminal declines whether be less than or equal to signal quality thresholding：

Calculate by the idling-resource block that currently takes out distribute and be not assigned to it is described when dispatch terminal when, it is described currently to take The new signal mass value and original signal mass value for the terminal dispatched on the idling-resource block gone out, according to the new signal mass value and original Signal quality value obtains overall spectrum variable quantity, by the overall spectrum variable quantity and default overall spectrum variable quantity threshold value ratio Compared with if less than equal to the overall spectrum variable quantity threshold value, then signal quality caused by disturbing is dropped by less than being equal to signal matter Thresholding is measured, otherwise, signal quality caused by interference, which declines, is more than signal quality thresholding.
8. device as claimed in claim 7, it is characterised in that the signal quality value is Signal to Interference plus Noise Ratio SINR value；

The scheduling unit obtains overall spectrum variable quantity according to the new signal mass value and original signal mass value to be included：

<mrow> <msub> <mi>&Delta;SE</mi> <mrow> <mi>U</mi> <mi>E</mi> </mrow> </msub> <mo>=</mo> <mfrac> <mrow> <mi>l</mi> <mi>o</mi> <mi>g</mi> <mrow> <mo>(</mo> <mn>1</mn> <mo>+</mo> <msub> <mi>SINR</mi> <mrow> <mi>U</mi> <mi>E</mi> </mrow> </msub> <mo>)</mo> </mrow> <mo>-</mo> <mi>l</mi> <mi>o</mi> <mi>g</mi> <mrow> <mo>(</mo> <mn>1</mn> <mo>+</mo> <msub> <mi>NewSINR</mi> <mrow> <mi>U</mi> <mi>E</mi> </mrow> </msub> <mo>)</mo> </mrow> </mrow> <mrow> <mi>l</mi> <mi>o</mi> <mi>g</mi> <mrow> <mo>(</mo> <mn>1</mn> <mo>+</mo> <msub> <mi>SINR</mi> <mrow> <mi>U</mi> <mi>E</mi> </mrow> </msub> <mo>)</mo> </mrow> </mrow> </mfrac> </mrow>

Wherein, SINR_UEFor original signal mass value, NewSINR_UEFor new signal mass value, Δ SE_UEChange for overall spectral efficiency Amount.