CN103079277A - Resource scheduling and distributing method and system in orthogonal frequency division multiplexing system - Google Patents
Resource scheduling and distributing method and system in orthogonal frequency division multiplexing system Download PDFInfo
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- CN103079277A CN103079277A CN201110327231XA CN201110327231A CN103079277A CN 103079277 A CN103079277 A CN 103079277A CN 201110327231X A CN201110327231X A CN 201110327231XA CN 201110327231 A CN201110327231 A CN 201110327231A CN 103079277 A CN103079277 A CN 103079277A
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Abstract
The invention provides a resource scheduling and distributing method and system in an orthogonal frequency division multiplexing system. The method comprises the steps of: determining coordinative sector sets of terminals by a super base station and each base station subordinate to the super base station, pre-distributing resources for the terminals by each sector or a central processing unit of each base station, and regulating distribution results by the super base station to ensure that different resource blocks are distributed to edge terminals with the same coordination sector set. With the adoption of the technical scheme disclosed by the invention, on the premise of not increasing extra signalling overheads and guaranteeing the flow of the sectors as much as possible, the interference coordination among the sectors is realized, and the flow of the edge terminals is improved.
Description
Technical field
The present invention relates to the communications field, relate in particular to scheduling of resource distribution method and the system of many sectors Combined Treatment in a kind of OFDM (Orthogonal Frequency Division Multiplexing is referred to as OFDM) system.
Background technology
Distributing antenna system is a kind of novel network architecture, in LTE-A (Long term evaluation-Advanced) system, be called again collaborative multiple spot (Coordinative Multiple Point, COMP) transmission, in this new framework, the Base Band Unit of several adjacent base stations is concentrated on certain super base station, form BBU (the Baseband Unit that concentrates, Base Band Unit), intermediate frequency or radiofrequency signal that BBU generates are delivered to each wireless remote unit (Radio Remote Unit by the RoF optical fiber transmission, RRU), i.e. antenna station.Antenna station in the distributing antenna system can be regarded a plurality of sectors of super base station as, therefore can well carry out working in coordination with between the antenna station, thereby can obtain " gain of associating sending/receiving ".
Carry out in the data transmission system of scheduling controlling in the employing base station, the dispatching distribution of all resources of system is undertaken by the base station usually, for example, the resource situation that can use when the resource allocation conditions when downlink transfer is carried out in the base station and terminal are carried out uplink etc., these are all distributed by base station scheduling.
In OFDM (Orthogonal Frequency Division Multiplexing is referred to as OFDM) system, in the same sector, when base station and different terminals carry out downlink data transmission, because these down links are orthogonal, so, can avoid disturbing in the sector.Yet the down link between the different sectors may not be quadrature, and therefore, each terminal may be subject to the descending interference from the base station of other adjacent sectors, that is, and and inter-sector interference.If inter-sector interference is serious, then can reduces the transmittability of power system capacity, particularly sector-edge user, and then affect the covering power of system and the performance of terminal.In order to overcome inter-sector interference and to guarantee certain bandwidth availability ratio, can adopt the interference coordination technique of time-frequency domain, different sub band resources is distributed to edge termination, to reduce inter-sector interference intensity.
The interference coordination dispatching method is that different sub band resources is distributed to edge termination, to reduce presence of intercell interference intensity, but in traditional interference coordination dispatching method for each sector, distributing to the sub band resources piece of edge termination fixes, the gain of when the edge termination that guarantees adjacent sectors distributes the different sub-band Resource Block, also having lost frequency selectivity like this, and in the situation of load imbalance, have the wasting of resources.
Summary of the invention
The present invention is proposed in order to address the above problem, the invention provides scheduling of resource distribution method and system in a kind of ofdm system, do not increasing extra signaling consumption and guaranteeing as far as possible to realize under the flow prerequisite of sector interference coordination between the sector, the problem of the flow of raising edge termination to solve.
The invention provides the scheduling of resource distribution method in a kind of ofdm system, comprising:
The coordination sets of sectors of terminal is determined in each base station under super base station or the super base station, the CPU of each sector or each base station is the terminal pre-allocation resource, super base station is adjusted allocation result, is assigned to not identical Resource Block so that coordinate the identical edge termination of sets of sectors.
Further, in distributing antenna system, that super base station is for determining the coordination sets of sectors of terminal, its method is: the reporting information of super base station statistics terminal, determine the Neighboring Cell List of terminal, then therefrom select the sector that is positioned under the same super base station, add serving sector, form the coordination sets of sectors of this terminal;
In other ofdm systems except distributed system, it is the coordination sets of sectors that terminal is determined in each base station under the super base station, its method is: the sector that is positioned under the same super base station is selected in the base station from the Neighboring Cell List of terminal, add serving sector, form the coordination sets of sectors of this terminal.
Further, in distributing antenna system, be the Neighboring Cell List that terminal is determined in super base station, in other ofdm systems except distributed system, be the Neighboring Cell List that terminal is determined in each base station under the super base station;
Described super base station or each base station determine the method for the Neighboring Cell List of terminal be following any one:
(1) the statistics terminal to report to the RSRQ metrical information of adjacent sectors, compare and measure the size of value and given threshold value, join in the Neighboring Cell List satisfying the sector index of measured value greater than given threshold value;
(2) the RSRQ metrical information that arrives adjacent sectors of statistics terminal to report and terminal are to the RSRQ metrical information of serving sector, difference more between the two and the size of given threshold value join in the Neighboring Cell List satisfying the sector index of measured value difference less than given threshold value.
Further, the Resource Block adjustment is carried out to each sector successively according to preset order in described super base station; When sector S is adjusted, carry out according to following steps:
Step a: all of searching serving sector and be described sector S need the terminal of adjustresources piece, the Resource Block of each terminal and scheduling thereof, indistributable Resource Block form the item of information of this terminal, and each item of information forms in the Resources list to be adjusted of described sector S;
The described terminal of adjustresources piece that needs is: the terminal that its scheduling resource block is identical with the scheduling resource block of the terminal of same type;
Step b: from the source schedule information table of described sector S, select one of them as current adjustment terminal u, if there is the terminal v that meets the following conditions in other terminals that need adjust, then exchanging the scheduling resource block of described terminal u and terminal v: terminal u and terminal v is dissimilar terminals, then execution in step d; If there is not then execution in step c;
Step c: the allowable resource of determining terminal u, find out the center terminal of having dispatched allowable resource, the scheduling resource of selecting one of them center terminal and terminal u to distribute exchanges, and deletes the item of information of terminal u from the Resources list to be adjusted of described sector S, then returns step b;
Steps d: need the item of information of deletion terminal u and terminal v the terminal of adjustresources piece from all of described sector S, then return step b;
Describedly can not Resources allocation refer to the Resource Block summation that the other-end of same type is dispatched;
Described allowable resource is all resources except can not Resources allocation;
The terminal of described same type refers to have the terminal of identical coordination sector.
Further, described default order is adjusted for beginning from sector priority order from low to high.
Further, in such a way any of described super base station generates sector priority under this super base station:
Generate at random the priority orders of each sector by random device; Perhaps,
Sort according to statistic flow, the sector priority that flow is lower is higher.
The present invention also provides the distribution system of the scheduling of resource in a kind of ofdm system, and described system comprises determination module, distribution module and adjusting module;
Described determination module is for the coordination sets of sectors of determining terminal;
Described distribution module is used to the terminal pre-allocation resource;
Described adjusting module is used for allocation result is adjusted, and is assigned to not identical Resource Block so that coordinate the identical edge termination of sets of sectors.
Further, in distributing antenna system, described determination module is positioned at super base station, and in other ofdm systems except distributed system, described determination module is arranged in each base station under the super base station;
Described determination module is determined the coordination sets of sectors of terminal in such a way: the reporting information of determination module statistics terminal, determine the Neighboring Cell List of terminal, then therefrom select the sector that is positioned under the same super base station, add serving sector, form the coordination sets of sectors of this terminal.
Further, described determination module also is used in such a way any and determines the Neighboring Cell List of terminal:
(1) determination module is added up the RSRQ metrical information to adjacent sectors of terminal to report, compares and measures the size of value and given threshold value, joins in the Neighboring Cell List satisfying the sector index of measured value greater than given threshold value;
(2) the RSRQ metrical information that arrives adjacent sectors of determination module statistics terminal to report and terminal are to the RSRQ metrical information of serving sector, difference more between the two and the size of given threshold value join in the Neighboring Cell List satisfying the sector index of measured value difference less than given threshold value.
Further, described adjusting module is positioned at super base station, successively the Resource Block adjustment is carried out in each sector according to preset order; When sector S is adjusted, carry out in such a way:
It is that all of described sector S need the terminal of adjustresources piece that adjusting module is searched serving sector, the Resource Block of each terminal and scheduling thereof, indistributable Resource Block are formed the item of information of this terminal, each item of information is formed in the Resources list to be adjusted of described sector S;
Adjusting module selects one of them as current adjustment terminal u from the Resources list to be adjusted of described sector S, if there is the terminal v that meets the following conditions in other terminals that need adjust, then exchanging the scheduling resource block of described terminal u and terminal v: terminal u and terminal v is dissimilar terminals, then adjusting module needs the item of information of deletion terminal u and terminal v the terminal of adjustresources piece from all of described sector S, afterwards remaining terminal is adjusted;
If there is not the terminal v that satisfies described condition, then adjusting module is determined the allowable resource of terminal u, find out the center terminal of having dispatched allowable resource, the scheduling resource of selecting one of them center terminal and terminal u to distribute exchanges, and from the Resources list to be adjusted of described sector S the item of information of deletion terminal u, then remaining terminal is adjusted;
The described terminal of adjustresources piece that needs is: the terminal that its scheduling resource block is identical with the scheduling resource block of the terminal of same type;
Describedly can not Resources allocation refer to the Resource Block summation that the other-end of same type is dispatched;
Described allowable resource is all resources except can not Resources allocation;
The terminal of described same type refers to have the terminal of identical coordination sector.
Further, described default order is adjusted for beginning from sector priority order from low to high.
Further, described system also comprises the generation module that is positioned at super base station, is used in such a way any and generates sector priority under the super base station:
Generate at random the priority orders of each sector by random device; Perhaps,
Sort according to statistic flow, the sector priority that flow is lower is higher.
By the present invention, the coordination sets of sectors of terminal can be determined according to the measurement result of terminal to report in each sector under the super base station, suppose that terminal is U, its serving sector is S, metrical information satisfies sector certain condition and that be positioned under the same super base station and is { N1, N2, N3}, then the coordination sets of sectors of U is { S, N1, N2, if N3} is according to certain rule, the element of judging in the terminal U coordination sets of sectors only has one, namely only have serving sector, terminal centered by this terminal then, on the contrary then be edge termination.Each sector is the terminal pre-allocation resource according to proportional fair scheduling, then the pre-allocation of resources result-sharing is given the controller of super base station, super base station is according to the priority between the sector, successively allocation result is finely tuned (method of adjustment is described in detail) in specific embodiment, be assigned to not identical frequency subband resource so that coordinate the identical edge termination of sets of sectors, to reach interference coordination, improve the purpose of the flow of edge termination.
Description of drawings
Fig. 1 is the flow chart that the scheduling of resource distribution method is carried out in super base station in the distributing antenna system according to the embodiment of the invention to terminal;
Fig. 2 is the distribution map of super base station and antenna in the distributing antenna system according to the embodiment of the invention 1, as shown in the figure, antenna C1, C2...C6 is connected with super base station by optical fiber, therefore can claim that these days, the sector of line end representative belonged to super base station Bs, the sector of antenna D representative does not then belong to super base station Bs;
Fig. 3 is the flow chart of the method that super base station is adjusted with criterion in a certain order to the preallocated result of each sector resources in the distributing antenna system according to the embodiment of the invention 1;
Fig. 4 is the base station distribution figure of super base station CPU and each adjacent sectors in the distributing antenna system according to the embodiment of the invention 2, sector C1, and C2...C6 is connected with super base station by optical fiber;
Fig. 5 is the flow chart that the resource adjustment is carried out in super base station among the inventive method embodiment according to the Resources list to be adjusted of sector S1.
Embodiment
Hereinafter also describe in conjunction with the embodiments the present invention in detail with reference to accompanying drawing.Need to prove that in the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
Scheduling of resource distribution method and the system of many sectors Combined Treatment in the invention provides in a kind of ofdm system, the coordination sets of sectors of terminal is determined in each base station under super base station or the super base station, the CPU of each sector or each base station is the terminal pre-allocation resource, super base station is adjusted allocation result, is assigned to not identical Resource Block so that coordinate the identical edge termination of sets of sectors.
Super base station is the superpower base station of a kind of disposal ability, and other base stations need that information is sent to super base station and process.Can be an independent entity, can in some base station entity, also can be the general designation of all concentrated sector BBU of BBU also.
System embodiment
Present embodiment provides the distribution system of the scheduling of resource in a kind of ofdm system, comprises determination module, distribution module and adjusting module;
Determination module is for the coordination sets of sectors of determining terminal;
Distribution module is used to the terminal pre-allocation resource;
Adjusting module is used for allocation result is adjusted, and is assigned to not identical Resource Block so that coordinate the identical edge termination of sets of sectors.
Further, in distributing antenna system, determination module is positioned at super base station, and in other ofdm systems except distributed system, determination module is arranged in each base station under the super base station;
Determination module is determined the coordination sets of sectors of terminal in such a way: the reporting information of determination module statistics terminal, determine the Neighboring Cell List of terminal, then therefrom select the sector that is positioned under the same super base station, add serving sector, form the coordination sets of sectors of this terminal.
Further, determination module also is used in such a way any and determines the Neighboring Cell List of terminal:
(1) determination module is added up the RSRQ metrical information to adjacent sectors of terminal to report, compares and measures the size of value and given threshold value, joins in the Neighboring Cell List satisfying the sector index of measured value greater than given threshold value;
(2) the RSRQ metrical information that arrives adjacent sectors of determination module statistics terminal to report and terminal are to the RSRQ metrical information of serving sector, difference more between the two and the size of given threshold value join in the Neighboring Cell List satisfying the sector index of measured value difference less than given threshold value.
Further, adjusting module is positioned at super base station, successively the Resource Block adjustment is carried out in each sector according to preset order; When sector S is adjusted, carry out in such a way:
It is that all of described sector S need the terminal of adjustresources piece that adjusting module is searched serving sector, the Resource Block of each terminal and scheduling thereof, indistributable Resource Block are formed the item of information of this terminal, each item of information is formed the Resources list to be adjusted of described sector S;
Adjusting module selects one of them as current adjustment terminal u from the source schedule information table of sector S, if there is the terminal v that meets the following conditions in other terminals that need adjust, then exchanging the scheduling resource block of described terminal u and terminal v: terminal u and terminal v is dissimilar terminals, then adjusting module needs the item of information of deletion terminal u and terminal v the terminal of adjustresources piece from all of described sector S, afterwards remaining terminal is adjusted;
If there is not the terminal v that satisfies described condition, then adjusting module is determined the allowable resource of terminal u, find out the center terminal of having dispatched allowable resource, the scheduling resource of selecting one of them center terminal and terminal u to distribute exchanges, and from the Resources list to be adjusted of described sector S the item of information of deletion terminal u, then remaining terminal is adjusted;
Need the terminal of adjustresources piece to be: the terminal that its scheduling resource block is identical with the scheduling resource block of the terminal of same type;
Can not Resources allocation refer to the Resource Block summation that the other-end of same type is dispatched;
Allowable resource is all resources except can not Resources allocation;
The terminal of same type refers to have the terminal of identical coordination sector.
Further, described default order is adjusted for beginning from sector priority order from low to high.
Further, described system also comprises the generation module that is positioned at super base station, is used in such a way any and generates sector priority under the super base station:
Generate at random the priority orders of each sector by random device; Perhaps,
Sort according to statistic flow, the sector priority that flow is lower is higher.
Embodiment of the method
Embodiment one
Embodiment one provides in the distributing antenna system of a kind of OFDM, the method of inter-sector interference coordinated scheduling and flow process, in this distributing antenna system, the RRU of each sector (Radio Remote Unit) is in different geographical position, the BBU of each sector (Baseband Unit) is in identical geographical position, the information of each sector can be by BBU independent process separately, there is simultaneously a CU (CPU), can conveniently read the data of each sector and carry out unified processing, the BBU of these each sectors that concentrate in together and CU are referred to as a super base station, present embodiment provides a kind of method and flow process of inter-sector interference coordinated scheduling, as shown in Figure 1, can may further comprise the steps:
Step S101, terminal periodic reports the RSRQ metrical information;
Wherein, metrical information comprises at least but does not limit with one of following: Reference Signal Received Power (Reference Signal Received Power, RSRP) measurement or RS received signal quality (Reference Signal Received Quality, RSRQ) are measured.The RSRP measurement is that the RS in certain frequency band (Reference Signal) received power is measured, thereby obtains the signal strength signal intensity in this frequency band.RSRQ measures the ratio that then is defined as signal strength signal intensity and interference strength.
Step S102, the reporting information of terminal is added up in super base station, determines the Neighboring Cell List of terminal.Two kinds of methods are specifically arranged:
The RSRQ metrical information to adjacent sectors of terminal to report is added up in super base station, compares and measures the size of value and given threshold value, joins in the Neighboring Cell List satisfying the sector index of measured value greater than given threshold value; Perhaps
The RSRQ metrical information that RSRQ metrical information and the terminal to adjacent sectors of super base station statistics terminal to report arrives serving sector, difference more between the two and the size of given threshold value join in the Neighboring Cell List satisfying the sector index of measured value difference less than given threshold value;
Step S103, sets of sectors is determined to coordinate in super base station;
Particularly: the sector that is positioned under the same super base station is selected in super base station from the Neighboring Cell List of terminal, add serving sector, forms the coordination sets of sectors of this terminal.If the element in the coordination sets of sectors of terminal greater than upper layer network cell location threshold value M, is then only got the index of M sector of its measured value maximum and coordinated the sector as it, namely the coordination sector number of any terminal all is not more than M (M＞1).(in general, suggestion M gets 3 or 4)
Step S104, super base station statistics terminal is coordinated the sector, judges terminal type, particularly: if only have element of serving sector in the coordination sets of sectors of terminal, terminal centered by this terminal then, on the contrary then be edge termination.Then further classify edge termination in super base station, principle of classification is: all are coordinated the identical edge termination of sets of sectors and are classified as a class, and set up an edge termination classification chart, as shown in the table, wherein first row represents the numbering of edge termination type, secondary series represents the coordination sets of sectors of the type terminal, the edge termination index set of the type is shown in the 3rd tabulation, and enabled state is shown in the 4th tabulation, and 1 expression enables, 0 expression does not enable, and all is set to 1 when initial;
| Type | Coordinate sets of sectors | The edge termination set | Enabled state |
| 1 | {n11，n12..} | {u11，u12，...} | 1 |
| 2 | {n21，n22，..} | {u21，u22，...} | 1 |
| ... | ... | ... | 1 |
Step S105, each sector BBU under the super base station proportionally fair scheduling algorithm carries out pre-scheduling to the terminal under each sector, generate a resource scheduling information table, described resource scheduling information table has indicated each terminal whether to be assigned to Resource Block, be assigned to which Resource Block, each sector all generates such resource scheduling information table, then all this table is shared to super base station controller;
Step S106, super base station generates the priority orders of each sector at random by random device;
Step S107 adjusts each sector successively according to priority order from low to high, until all sector adjustment are finished.
Step S108, the resource scheduling information table after super base station will be adjusted sends to each sector, and flow process finishes.
The concrete adjustment mode of step 107 is as follows:
Step S201: choose the minimum sector of medium priority, current super base station, be assumed to be sector S1, super base station is according to the edge termination classification form, only consider the edge termination type (enabling to be designated 1 type in the form) that enables, find out the edge termination type that all coordinate to comprise in the sets of sectors sector S1, determine simultaneously the edge termination index, suppose for sector S1, above-mentioned edge termination one total N class, type number is respectively { T1, T2...TN}, hypothesis i=1 then changes step S202 over to when initial;
Step S202: super base station selected { T1, i edge termination type Ti among the T2...TN} judge i≤N, are execution in step 203 then, otherwise execution in step 206;
Step 203: determine the edge termination set of the type and coordinate sets of sectors, then determine the edge termination of the type identical frequency resource block that whether has been scheduled in twos according to the resource scheduling information table, do not consider the terminal that is not scheduled, if the frequency resource block of terminal scheduling is different, the sign that enables of the type in the edge termination classification form is set to 0, make i=i+1, return step S202, otherwise change step S204 over to;
Step S204 if there is the identical terminal of scheduling resource block, then finds out these terminals, whether the serving sector of searching one by one these terminals is S1, if the serving sector of neither one is S1, then makes i=i+1, change step S202 over to, if there is such terminal, then execution in step 205;
Step 205: with the terminal index of each terminal, the Resource Block of its scheduling and the item of information that indistributable Resource Block forms this terminal; Each item of information forms the Resources list to be adjusted of sector S;
Particularly: the statistics serving sector is not all Resource Block of having dispatched of edge termination of the type of S1, be assumed to be { RB11, RB12...RB1P}, it is added in the Resources list to be adjusted of sector S1, and form is as follows, and first row represents the Resource Block that needs that this terminal distributed are adjusted, secondary series GC group connector call number, then the Resource Block that the 3rd row GC group connector cannot distribute makes i=i+1, returns step S202;
| The Resource Block that has distributed | The terminal index | The Resource Block that cannot distribute |
| RBd1 | U1 | RB11，RB12...RB1P |
| RBd2 | U2 | RB21，RB22...RB2X |
| ... | ... | ... |
Especially: if terminal distribution a plurality of frequency resource block, the frequency resource block that has belongs to the Resource Block that this terminal cannot be distributed, the frequency resource block that has does not belong to the Resource Block that this terminal cannot be distributed, the part that then only will belong to the Resource Block that this terminal cannot distribute adds in the Resources list to be adjusted, for example: an edge termination UE is arranged, distributed 3 frequency resource block to be respectively RB1, RB2, RB3, wherein RB1 does not belong to the Resource Block that cannot distribute, and RB2 and RB3 belong to the Resource Block that cannot distribute, and then need following two row are added in the Resources list to be adjusted;
The resource adjustment is carried out according to the Resources list to be adjusted of sector S1 in super base station, specifically as shown in Figure 5, comprises that step S206 is to step S209;
Step S206, order according to the Resources list to be adjusted circulates, and determines the current Resource Block RBw that needs adjustment, determines current terminal u, u can not distributes resource blocks gather, and determines other Resource Block that need to adjust and corresponding terminal in the Resources list to be adjusted;
Step S207, current terminal v is determined in other Resource Block that need to adjust and corresponding terminal circulation in the Resources list to be adjusted, v's can not Resources allocation and Resources allocation RBv, carries out following two judgements:
Terminal v can not Resources allocation comprise the Resources allocation RBw of terminal u;
Terminal u can not Resources allocation comprise the Resources allocation RBv of terminal v;
U belongs to different terminal types with terminal v if above-mentioned two conditions all satisfy the explanation terminal, then changes step S208 over to, otherwise re-starts step S207, enters next circulation, until circulation finishes, changes step S209 over to.
Step S208, Resources allocation Rbw and the RBv of the correspondence of terminal u in the Resources list to be adjusted and terminal v are exchanged, classify Rbw and RBv as from the Resources list to be adjusted deletion first two, upgrade the resource scheduling information table of sector S1, return step S206 and continue next circulation, until circulation finishes, then change step S209 over to;
Step S209, the allowable resource (i.e. all resources except can not Resources allocation) of terminal u is determined in super base station, find out the center terminal of having dispatched allowable resource, the resource of selecting one of them center terminal and terminal u to distribute exchanges, upgrade the resource scheduling information table, classify the item of Rbw as from the Resources list deletion first to be adjusted, if there is no qualified center terminal, then will not adjust, return step S206 and continue next circulation, until circulation finishes then to change over to step S210;
Step S210, this sector scheduling resource is adjusted complete, changes step S201 over to, carries out the processing of next sector, until the sector circulation finishes.
Embodiment two
Present embodiment provides method and the flow process of the interval interference coordination scheduling of a kind of other ofdm system middle fans except distributing antenna system, in this system, carry out the mutual transmission of information between each sector by optical fiber, the information of each sector is by separately BBU independent process, there is simultaneously a CU (CPU), it can be arranged in some sectors entity, it also can be an independently entity, be connected with adjacent sector base stations by optical fiber, carry out information interaction, this CPU is called super base station, all coupled sectors are called the adjacent sectors of this super base station, all can be subjected to the control of this super base station, present embodiment provides method and the flow process of concrete inter-sector interference coordinated scheduling, can may further comprise the steps:
Step S101, terminal periodic reports the RSRQ metrical information;
Wherein, metrical information comprises at least but does not limit with one of following: Reference Signal Received Power (Reference Signal Received Power, RSRP) measurement or RS received signal quality (Reference Signal Received Quality, RSRQ) are measured.The RSRP measurement is that the RS in certain frequency band (Reference Signal) received power is measured, thereby obtains the signal strength signal intensity in this frequency band.RSRQ measures the ratio that then is defined as signal strength signal intensity and interference strength.
Step S102, the reporting information of terminal is added up in each base station, determines the Neighboring Cell List of terminal.Two kinds of methods are specifically arranged:
The RSRQ metrical information to adjacent sectors of terminal to report is added up in the base station, compares and measures the size of value and given threshold value, joins in the Neighboring Cell List satisfying the sector index of measured value greater than given threshold value; Perhaps,
The RSRQ metrical information that RSRQ metrical information and the terminal to adjacent sectors of base station statistics terminal to report arrives serving sector, difference more between the two and the size of given threshold value join in the Neighboring Cell List satisfying the sector index of measured value difference less than given threshold value;
Step S103, the coordination sets of sectors of terminal is determined in each base station under the super base station;
Particularly: the sector that is positioned under the same super base station is selected in the base station from the Neighboring Cell List of terminal, add serving sector, forms the coordination sets of sectors of this terminal.If the element in the coordination sets of sectors of terminal greater than upper layer network cell location threshold value M, is then only got the index of M sector of its measured value maximum and coordinated the sector as it, namely the coordination sector number of any terminal all is not more than M (M＞1).(in general, suggestion M gets 3 or 4)
Step S104, each base station statistics terminal is coordinated sector under the super base station, judges terminal type, particularly: if only have element of serving sector in the coordination sets of sectors of terminal, terminal centered by this terminal then, on the contrary then be edge termination.Then further classify edge termination in super base station, principle of classification is: all are coordinated the identical edge termination of sets of sectors and are classified as a class, and set up an edge termination classification chart, as shown in the table, wherein first row represents the numbering of edge termination type, secondary series represents the coordination sets of sectors of the type terminal, the edge termination index set of the type is shown in the 3rd tabulation, enabled state is shown in the 4th tabulation, 1 expression enables, 0 expression does not enable, and all is set to 1 when initial, and this edge termination classification chart is issued super base station by wireline interface;
| Type | Coordinate sets of sectors | The edge termination set | Enabled state |
| 1 | {n11，n12..} | {u11，u12，...} | 1 |
| 2 | {n21，n22，..} | {u21，u22，...} | 1 |
| ... | ... | ... | 1 |
Step S105, the BBU of each base station under the super base station proportionally fair scheduling algorithm carries out pre-scheduling to the terminal under each sector, generate a resource scheduling information table, described resource scheduling information table has indicated each terminal whether to be assigned to Resource Block, be assigned to which Resource Block, each sector all generates such resource scheduling information table, then all this table is sent to super base station;
Step S106, super base station generates the priority orders of each sector at random by random device;
Step S107 adjusts each sector successively according to priority order from low to high, until all sector adjustment are finished.
Step S108, the resource scheduling information table after super base station will be adjusted sends to each sector, and flow process finishes.
The concrete adjustment mode of step 107 is as follows:
Step S201: choose the minimum sector of medium priority, current super base station, be assumed to be sector S1, super base station is according to the edge termination classification form, only consider the edge termination type (enabling to be designated 1 type in the form) that enables, find out the edge termination type that all coordinate to comprise in the sets of sectors sector S1, determine simultaneously the edge termination index, suppose for sector S1, above-mentioned edge termination one total N class, type number is respectively { T1, T2...TN}, hypothesis i=1 then changes step S202 over to when initial;
Step S202: super base station selected { T1, i edge termination type Ti among the T2...TN} judge i≤N, are execution in step 203 then, otherwise execution in step 206;
Step 203: determine the edge termination set of the type and coordinate sets of sectors, then determine the edge termination of the type identical frequency resource block that whether has been scheduled in twos according to the resource scheduling information table, do not consider the terminal that is not scheduled, if the frequency resource block of terminal scheduling is different, the sign that enables of the type in the edge termination classification form is set to 0, make i=i+1, return step S202, otherwise change step S204 over to;
Step S204 if there is the identical terminal of scheduling resource block, then finds out these terminals, whether the serving sector of searching one by one these terminals is S1, if the serving sector of neither one is S1, then makes i=i+1, change step S202 over to, if there is such terminal, then execution in step 205;
Step 205: with the terminal index of each terminal, the Resource Block of its scheduling and the item of information that indistributable Resource Block forms this terminal; Each item of information forms in the Resources list to be adjusted of sector S;
Particularly: the statistics serving sector is not all Resource Block of having dispatched of edge termination of the type of S1, be assumed to be { RB11, RB12...RB1P}, it is added in the Resources list to be adjusted of sector S1, and form is as follows, and first row represents the Resource Block that needs that this terminal distributed are adjusted, secondary series GC group connector call number, then the Resource Block that the 3rd row GC group connector cannot distribute makes i=i+1, returns step S202;
| The Resource Block that has distributed | The terminal index | The Resource Block that cannot distribute |
| RBd1 | U1 | RB11，RB12...RB1P |
| RBd2 | U2 | RB21，RB22...RB2X |
| ... | ... | ... |
Especially: if terminal distribution a plurality of frequency resource block, the frequency resource block that has belongs to the Resource Block that this terminal cannot be distributed, the frequency resource block that has does not belong to the Resource Block that this terminal cannot be distributed, the part that then only will belong to the Resource Block that this terminal cannot distribute adds in the Resources list to be adjusted, for example: an edge termination UE is arranged, distributed 3 frequency resource block to be respectively RB1, RB2, RB3, wherein RB1 does not belong to the Resource Block that cannot distribute, and RB2 and RB3 belong to the Resource Block that cannot distribute, and then need following two row are added in the Resources list to be adjusted;
The resource adjustment is carried out according to the Resources list to be adjusted of sector S1 in super base station, specifically as shown in Figure 5, comprises that step S206 is to step S209;
Step S206, order according to the Resources list to be adjusted circulates, and determines the current Resource Block RBw that needs adjustment, determines current terminal u, u can not distributes resource blocks gather, and determines other Resource Block that need to adjust and corresponding terminal in the Resources list to be adjusted;
Step S207, current terminal v is determined in other Resource Block that need to adjust and corresponding terminal circulation in the Resources list to be adjusted, v's can not Resources allocation and Resources allocation RBv, carries out following two judgements:
Terminal v can not Resources allocation comprise the Resources allocation RBw of terminal u;
Terminal u can not Resources allocation comprise the Resources allocation RBv of terminal v;
U belongs to different terminal types with terminal v if above-mentioned two conditions all satisfy the explanation terminal, then changes step S208 over to, otherwise re-starts step S207, enters next circulation, until circulation finishes, changes step S209 over to.
Step S208, Resources allocation Rbw and the RBv of the correspondence of terminal u in the Resources list to be adjusted and terminal v are exchanged, classify Rbw and RBv as from the Resources list to be adjusted deletion first two, upgrade the resource scheduling information table of sector S1, return step S206 and continue next circulation, until circulation finishes, then change step S209 over to;
Step S209, the allowable resource (i.e. all resources except can not Resources allocation) of terminal u is determined in super base station, find out the center terminal of having dispatched allowable resource, the resource of selecting one of them center terminal and terminal u to distribute exchanges, upgrade the resource scheduling information table, classify the item of Rbw as from the Resources list deletion first to be adjusted, if there is no qualified center terminal, then will not adjust, return step S206 and continue next circulation, until circulation finishes then to change over to step S210;
Step S210, this sector scheduling resource is adjusted complete, changes step S201 over to, carries out the processing of next sector, until the sector circulation finishes.
By above-mentioned steps, in distributing antenna system, coordinated scheduling is carried out in many sectors, realizes interference coordination between the sector under the prerequisite of sector flow and fairness not increasing extra signaling consumption and guarantee as far as possible, improves the flow of edge termination.
Need to prove that as a kind of possibility, each configuration information in the above-mentioned example can carry out default configuration by the agreement regulation, perhaps is configured rear informing base station by upper layer network element.The upper layer network element here can be trunking, base station controller, access service network, connection service network, core net gateway etc.
The scheduling of resource of up (transmitting terminal is the terminal use, and receiving terminal is the base station) communication system that in addition, above-mentioned Multi-instance all is applicable to and descending (transmitting terminal is the base station, and receiving terminal is the terminal use) communication system.
In sum, pass through the solution of the present invention, take pseudo-handover operation for terminal in the overweight sector of fractional load, in the load balancing that realizes under the prerequisite that does not increase extra signaling consumption and terminal complexity between the sector, thereby the throughput that elevator system is total, reduce scheduling and wait for time delay, improve the flow of edge termination.And technical scheme of the present invention, is easy to realize and promote to have stronger industrial usability all less than revising for the existing network architecture and existing flow process etc.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. the scheduling of resource distribution method in the ofdm system comprises:
The coordination sets of sectors of terminal is determined in each base station under super base station or the super base station, the CPU of each sector or each base station is the terminal pre-allocation resource, super base station is adjusted allocation result, is assigned to not identical Resource Block so that coordinate the identical edge termination of sets of sectors.
2. the method for claim 1 is characterized in that:
In distributing antenna system, that super base station is for determining the coordination sets of sectors of terminal, its method is: the reporting information of super base station statistics terminal, determine the Neighboring Cell List of terminal, then therefrom select the sector that is positioned under the same super base station, add serving sector, form the coordination sets of sectors of this terminal;
In other ofdm systems except distributed system, it is the coordination sets of sectors that terminal is determined in each base station under the super base station, its method is: the sector that is positioned under the same super base station is selected in the base station from the Neighboring Cell List of terminal, add serving sector, form the coordination sets of sectors of this terminal.
3. method as claimed in claim 2 is characterized in that:
In distributing antenna system, be the Neighboring Cell List that terminal is determined in super base station, in other ofdm systems except distributed system, be the Neighboring Cell List that terminal is determined in each base station under the super base station;
Described super base station or each base station determine the method for the Neighboring Cell List of terminal be following any one:
(1) the statistics terminal to report to the RSRQ metrical information of adjacent sectors, compare and measure the size of value and given threshold value, join in the Neighboring Cell List satisfying the sector index of measured value greater than given threshold value;
(2) the RSRQ metrical information that arrives adjacent sectors of statistics terminal to report and terminal are to the RSRQ metrical information of serving sector, difference more between the two and the size of given threshold value join in the Neighboring Cell List satisfying the sector index of measured value difference less than given threshold value.
4. the method for claim 1 is characterized in that:
The Resource Block adjustment is carried out to each sector successively according to preset order in described super base station; When sector S is adjusted, carry out according to following steps:
Step a: all of searching serving sector and be described sector S need the terminal of adjustresources piece, the Resource Block of each terminal and scheduling thereof, indistributable Resource Block form the item of information of this terminal, and each item of information forms in the Resources list to be adjusted of described sector S;
The described terminal of adjustresources piece that needs is: the terminal that its scheduling resource block is identical with the scheduling resource block of the terminal of same type;
Step b: from the source schedule information table of described sector S, select one of them as current adjustment terminal u, if there is the terminal v that meets the following conditions in other terminals that need adjust, then exchanging the scheduling resource block of described terminal u and terminal v: terminal u and terminal v is dissimilar terminals, then execution in step d; If there is not then execution in step c;
Step c: the allowable resource of determining terminal u, find out the center terminal of having dispatched allowable resource, the scheduling resource of selecting one of them center terminal and terminal u to distribute exchanges, and deletes the item of information of terminal u from the Resources list to be adjusted of described sector S, then returns step b;
Steps d: need the item of information of deletion terminal u and terminal v the terminal of adjustresources piece from all of described sector S, then return step b;
Describedly can not Resources allocation refer to the Resource Block summation that the other-end of same type is dispatched;
Described allowable resource is all resources except can not Resources allocation;
The terminal of described same type refers to have the terminal of identical coordination sector.
5. method as claimed in claim 4 is characterized in that:
Described default order is adjusted for beginning from sector priority order from low to high.
6. method as claimed in claim 5 is characterized in that, in such a way any of described super base station generates sector priority under this super base station:
Generate at random the priority orders of each sector by random device; Perhaps,
Sort according to statistic flow, the sector priority that flow is lower is higher.
7. the scheduling of resource distribution system in the ofdm system, it is characterized in that: described system comprises determination module, distribution module and adjusting module;
Described determination module is for the coordination sets of sectors of determining terminal;
Described distribution module is used to the terminal pre-allocation resource;
Described adjusting module is used for allocation result is adjusted, and is assigned to not identical Resource Block so that coordinate the identical edge termination of sets of sectors.
8. system as claimed in claim 7 is characterized in that:
In distributing antenna system, described determination module is positioned at super base station, and in other ofdm systems except distributed system, described determination module is arranged in each base station under the super base station;
Described determination module is determined the coordination sets of sectors of terminal in such a way: the reporting information of determination module statistics terminal, determine the Neighboring Cell List of terminal, then therefrom select the sector that is positioned under the same super base station, add serving sector, form the coordination sets of sectors of this terminal.
9. system as claimed in claim 8 is characterized in that:
Described determination module also is used in such a way any and determines the Neighboring Cell List of terminal:
(1) determination module is added up the RSRQ metrical information to adjacent sectors of terminal to report, compares and measures the size of value and given threshold value, joins in the Neighboring Cell List satisfying the sector index of measured value greater than given threshold value;
(2) the RSRQ metrical information that arrives adjacent sectors of determination module statistics terminal to report and terminal are to the RSRQ metrical information of serving sector, difference more between the two and the size of given threshold value join in the Neighboring Cell List satisfying the sector index of measured value difference less than given threshold value.
10. system as claimed in claim 7 is characterized in that:
Described adjusting module is positioned at super base station, successively the Resource Block adjustment is carried out in each sector according to preset order; When sector S is adjusted, carry out in such a way:
It is that all of described sector S need the terminal of adjustresources piece that adjusting module is searched serving sector, the Resource Block of each terminal and scheduling thereof, indistributable Resource Block are formed the item of information of this terminal, each item of information is formed in the Resources list to be adjusted of described sector S;
Adjusting module selects one of them as current adjustment terminal u from the Resources list to be adjusted of described sector S, if there is the terminal v that meets the following conditions in other terminals that need adjust, then exchanging the scheduling resource block of described terminal u and terminal v: terminal u and terminal v is dissimilar terminals, then adjusting module needs the item of information of deletion terminal u and terminal v the terminal of adjustresources piece from all of described sector S, afterwards remaining terminal is adjusted;
If there is not the terminal v that satisfies described condition, then adjusting module is determined the allowable resource of terminal u, find out the center terminal of having dispatched allowable resource, the scheduling resource of selecting one of them center terminal and terminal u to distribute exchanges, and from the Resources list to be adjusted of described sector S the item of information of deletion terminal u, then remaining terminal is adjusted;
The described terminal of adjustresources piece that needs is: the terminal that its scheduling resource block is identical with the scheduling resource block of the terminal of same type;
Describedly can not Resources allocation refer to the Resource Block summation that the other-end of same type is dispatched;
Described allowable resource is all resources except can not Resources allocation;
The terminal of described same type refers to have the terminal of identical coordination sector.
11. system as claimed in claim 10 is characterized in that:
Described default order is adjusted for beginning from sector priority order from low to high.
12. system as claimed in claim 11 is characterized in that:
Described system also comprises the generation module that is positioned at super base station, is used in such a way any and generates sector priority under the super base station:
Generate at random the priority orders of each sector by random device; Perhaps,
Sort according to statistic flow, the sector priority that flow is lower is higher.
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| CN103415020A (en) * | 2013-07-26 | 2013-11-27 | 西安交通大学 | Interference solution based on frequency division in relay system |
| WO2016026119A1 (en) * | 2014-08-21 | 2016-02-25 | 华为技术有限公司 | Coordinated multi-point transmission method and apparatus |
| CN106211338A (en) * | 2016-07-13 | 2016-12-07 | 江苏中兴微通信息科技有限公司 | A kind of user scheduling method utilizing spatial domain position characteristic |
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| CN101674652A (en) * | 2009-10-15 | 2010-03-17 | 华为技术有限公司 | Frequency resource distribution method and device |
| CN101998650A (en) * | 2009-08-31 | 2011-03-30 | 上海交通大学 | Channel allocation method and system in wireless communication system |
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| WO2011063740A1 (en) * | 2009-11-24 | 2011-06-03 | 华为技术有限公司 | Base station, network system and implementation method |
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| CN101998650A (en) * | 2009-08-31 | 2011-03-30 | 上海交通大学 | Channel allocation method and system in wireless communication system |
| CN101674652A (en) * | 2009-10-15 | 2010-03-17 | 华为技术有限公司 | Frequency resource distribution method and device |
| WO2011063740A1 (en) * | 2009-11-24 | 2011-06-03 | 华为技术有限公司 | Base station, network system and implementation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103415020A (en) * | 2013-07-26 | 2013-11-27 | 西安交通大学 | Interference solution based on frequency division in relay system |
| WO2016026119A1 (en) * | 2014-08-21 | 2016-02-25 | 华为技术有限公司 | Coordinated multi-point transmission method and apparatus |
| CN106576263A (en) * | 2014-08-21 | 2017-04-19 | 华为技术有限公司 | Coordinated multi-point transmission method and apparatus |
| CN106576263B (en) * | 2014-08-21 | 2020-04-03 | 华为技术有限公司 | Coordinated multi-point transmission method and device |
| CN106211338A (en) * | 2016-07-13 | 2016-12-07 | 江苏中兴微通信息科技有限公司 | A kind of user scheduling method utilizing spatial domain position characteristic |
| CN106211338B (en) * | 2016-07-13 | 2019-06-14 | 江苏中兴微通信息科技有限公司 | A kind of user scheduling method using airspace position characteristic |
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