CN101437292A - Method and apparatus for scheduling time frequency resource of OFDM system - Google Patents
Method and apparatus for scheduling time frequency resource of OFDM system Download PDFInfo
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- CN101437292A CN101437292A CNA2008102405083A CN200810240508A CN101437292A CN 101437292 A CN101437292 A CN 101437292A CN A2008102405083 A CNA2008102405083 A CN A2008102405083A CN 200810240508 A CN200810240508 A CN 200810240508A CN 101437292 A CN101437292 A CN 101437292A
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Abstract
The invention discloses a method and a device for scheduling time-frequency resource of an orthogonal frequency-division multiplexing (OFDM) system. The method comprises the following steps: according to the number N of cells in the clusters of the OFDM system and the number S of sectors of each cell, a time-frequency resource is divided into N*S time-frequency resource block groups; during the allocation of the time-frequency resource, part or all of the N*S time-frequency resource block groups are allocated to the sectors of the cells according to the actual business of each sector, wherein the time-frequency resource block groups allocated to the sectors are different, the time-frequency resource block groups allocated to the same sector are different, and the priority levels of the time-frequency resource block groups allocated to each sector are arranged from high to low according to an allocation sequence; and the base stations in each cell allocate the time-frequency blocks of the time-frequency resource block groups to services in need according to the high-to-low sequence of the priority levels of the time-frequency resource block groups allocated to the sectors of the cell.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to the dispatching method and the device thereof of running time-frequency resource in a kind of ofdm system.
Background technology
OFDM (Orthogonal Frequency Division Multiplexing, OFDM) technology is suggested in the sixties in 20th century as a kind of high speed transmission technology of wireless communication system, in recent years along with the develop rapidly of Digital Signal Processing and integrated circuit technique, this technology is applied in multiple communication standard, as IEEE 802.16 series standards, 3GPP Long Term Evolution (Long-Term Evolution, LTE) etc., in next generation mobile communication system IMT-Advanced, also be expected to become the key technology of main flow.
The same with other cellular communication systems, ofdm system also needs to determine frequency reuse mode when the network planning, the line frequency of going forward side by side planning, wherein:
The radio-ray path loss characteristic that is based on channeling realizes that its unit is a carrier wave.Distance is enough far away between two base stations, and the carrier frequency that is used for a base station so can be multiplexing by the carrier frequency of another base station, thereby improved spectrum efficiency.The zone that each base station covers is called honeycomb, uses the cellular cell of same frequency to be called co-frequency cell.Distance D between these co-frequency cells is called frequency reuse distance.In design, frequency reuse distance D must be enough far away, so that enough low with subchannel interference level, thus covering quality guaranteed.
The base unit of frequency planning is a cell cluster, bunch being that unit carries out channeling in the overlay area.Bunch be the set of one group of N sub-district, this N has used a sub-district whole available spectrum resources, but each cell operation frequency is different, and each sub-district distribution mode and frequency allocation plan have determined frequency reuse mode in bunch.
In existing resource management and dispatching method, also do not plan, thereby limited the interference suppressioning effect of minizone at the time-frequency two-dimensional characteristic of OFDM/OFDMA resource management.
Summary of the invention
The embodiment of the invention provides the dispatching method and the system thereof of running time-frequency resource in a kind of ofdm system, to solve the problem that the presence of intercell interference of not carrying out scheduling of resource at the time-frequency two-dimensional characteristic of resource management in the prior art and causing suppresses weak effect.
The dispatching method of running time-frequency resource in the ofdm system that the embodiment of the invention provides comprises:
According to bunch number of cells N that is comprised in the described system and the number of sectors S that each sub-district is comprised, available running time-frequency resource is divided into N * S time group in advance;
When carrying out time-frequency resource allocating, actual volume according to each sector, to partly or entirely distribute to each sector in each sub-district in described N * S the time group, wherein, different for the time group that each sector is distributed, the priority of the time group that the time group is different and each sector is assigned to that is assigned in each sector is provided with from high to low according to the sequencing that distributes;
The priority order from high to low of the time group that the base station in each sub-district is assigned to according to each sector in the sub-district, place uses to required business the time assignment in the time group.
The dispatching patcher of time-frequency font in the ofdm system that the embodiment of the invention provides comprises:
The resource distribution module, be used to receive and store available running time-frequency resource information, described available running time-frequency resource information comprises the part or all of time group information in N * S the time group, wherein, different for the time group that each sector is distributed, the priority of the time group that the time group is different and each sector is assigned to that is assigned in each sector is provided with from high to low according to the sequencing that distributes; Wherein, N is a number of cells, and S is the number of sectors that each sub-district comprised;
The scheduling of resource module is used for the priority order from high to low of the time group that is assigned to according to each sector, sub-district, this dispatching device place, uses to required business the time assignment in the time group.
In the above embodiment of the present invention, give each sector with the time set of dispense and the priority of time group is set, and carry out scheduling of resource according to the priority of Resource Block group, make the priority difference of the same resource block group number of distributing in the different sectors, thereby use the probability of same resource block greatly to reduce in the different sectors simultaneously, can effectively reduce annoyance level in the net, both adapt to the demand that traffic carrying capacity changes, can guarantee covering quality again.Again because the time group has the two-dimensional characteristics of time and frequency, reduced the scheduling of resource granularity than the resource regulating method of prior art, thereby improved the interference suppressioning effect of minizone.
Description of drawings
Fig. 1 is (N=4, multiplexer mode figure S=3) of OFDMA system in the embodiment of the invention;
Fig. 2 distributes the schematic diagram of 1 group of Resource Block group for every sector in the system shown in Figure 1;
Fig. 3 distributes the schematic diagram of 2 groups of Resource Block groups for every sector in the system shown in Figure 1;
Fig. 4 distributes the schematic diagram of 4 groups of Resource Block groups for every sector in the system shown in Figure 1;
Fig. 5 is the Resource Block group schematic diagram of the actual use in every sector in the embodiment of the invention;
Fig. 6 uses one group of Resource Block group schematic diagram for heavy traffic sector, same sub-district in the embodiment of the invention to an adjacent low traffic sector temporarily;
Fig. 7 uses one group of Resource Block group schematic diagram for heavy traffic sector, same sub-district in the embodiment of the invention respectively to two adjacent low traffic sectors temporarily;
When Fig. 8 all uses one group of Resource Block group for each sector, sub-district in the embodiment of the invention, the distribution schematic diagram of Resource Block group coverage;
When Fig. 9 all uses two groups of Resource Block groups for each sector, sub-district in the embodiment of the invention, the distribution schematic diagram of Resource Block group coverage;
When Figure 10 all uses three groups of Resource Block groups for each sector, sub-district in the embodiment of the invention, the distribution schematic diagram of Resource Block group coverage;
When Figure 11 all uses four groups of Resource Block groups for each sector, sub-district in the embodiment of the invention, the distribution schematic diagram of Resource Block group coverage;
Figure 12 is the structural representation of the dispatching patcher of running time-frequency resource in the ofdm system in the embodiment of the invention.
Embodiment
The embodiment of the invention is at the time-frequency two-dimensional characteristic of OFDM/OFDMA system resource management and scheduling, proposed the dispatching method of time-frequency unit-Resource Block, and proposed OFDM/OFDMA dynamic time-frequency dispatching method at the dynamic change of network load based on resource management.The dispatching method that the embodiment of the invention provides had both been drawn the advantage of legacy frequencies dispatching method, strengthened specific aim again to the OFDM/OFDMA technology, dynamic programming method has further improved the performance of planning, and control is disturbed with management OFDM/OFDMA networking better.
Below in conjunction with accompanying drawing to the embodiment of the invention is described in detail.
In the OFDM/OFDMA system, resource management is a time-frequency two-dimensional with scheduling, in time, is that unit carries out dispatching management according to time slot or symbol generally, on frequency, is that unit handles by a plurality of subcarriers often.1 time resource is handled unit * 1 frequency resource and is handled the minimum particle size that unit has constituted a resource scheduling management.In 3GPP LTE standard, this time-frequency dispatching management unit is called Resource Block, 1 Resource Block=(12 15kHz or 24 7.5kHz subcarriers) * 1 time slot.In the IEEE 802.16e standard, directly do not define Resource Block, but also according to the time-the frequency mode carries out resource scheduling management, chronomere's is-symbol, 1 symbol=102.9ms, cps are the combination-subchannels of subcarrier.Adopt the method in the 3GPP LTE codes and standards in embodiments of the present invention, with the time-least unit of frequency management and dispatching is called Resource Block.This method also is applicable to other ofdm systems such as WiMAX.
Use all available running time-frequency resources for the coverage that makes each sub-district in the embodiment of the invention, (N represents number of cells to need that available running time-frequency resource is divided into N * S, S represents the number of sectors in each sub-district) group Resource Block group, when giving each sector of each sub-district with these Resource Block set of dispense, can pass through the repeated dispensing process, all Resource Block components are fitted on each sub-district.Distribute 1 group of Resource Block group for each sector each time, and setting is assigned to the priority of the Resource Block group in each sector, the priority of the Resource Block group in each sector is arranged from high to low by the sequencing that distributes, and each time in the assigning process, the Resource Block group of distributing between each sector has nothing in common with each other each other, and the Resource Block group that is assigned with in each sector also has nothing in common with each other.
Time-frequency multiplexer mode figure with OFDMA system shown in Figure 1 is that example describes below.There are 4 bunches among the time-frequency multiplexer mode figure of shown in Figure 1 middle OFDMA system, are designated as A, B, C, D respectively; 4 sub-districts (coverage of a base station is a sub-district) are arranged in each bunch, and promptly N=4 is designated as B respectively
1, B
2, B
3, B
4, the coverage of each sub-district is divided into 3 sectors, and promptly S=3 is designated as S respectively
I, 1, S
I, 2, S
I, 3(1≤i≤4).At OFDMA system shown in Figure 1, use all available running time-frequency resources for the coverage that makes each sub-district in the embodiment of the invention, available running time-frequency resource is divided into N * S=12 group Resource Block group, and, be designated as 1,2 to every group of Resource Block group serial number, ..., 12.12 groups of Resource Block components are fitted in the process of each sub-district, and each assigning process is:
Distribute for the first time: to bunch in each sector of each sub-district carry out the distribution of the 1st group of Resource Block group, the priority of the Resource Block group of distributing in each sector is set, it is the highest that the priority that is assigned to the 1st group of Resource Block group in each sector is made as in sector separately.Distribution result is as shown in table 1 for the first time:
Table 1
As can be seen from Table 1,1 group of Resource Block group is distributed in each sector, and the Resource Block group is all inequality between all sectors.Resource Block group number between each sector of same sub-district differs 4.The priority level of setting each Resource Block group of this sub-distribution is the limit priority in the sector separately, and note is done 1 grade.At this moment, the distribution schematic diagram of Resource Block group as shown in Figure 2, wherein, S
I, j(1≤i≤4,1≤j≤3) expression sector, the numbering of the numeral Resource Block group behind the colon.
Distribute for the second time: to bunch in each sector of each sub-district carry out the distribution of the 2nd Resource Block group, the priority of the Resource Block group of distributing in each sector is set, the priority of the 2nd group of Resource Block group being assigned in each sector the 1st group of Resource Block group of priority ratio in sector is separately taken second place.The 2nd Resource Block group carried out in each sector distribute, distribution method is:
Because the 2nd group of Resource Block group is the secondary multiplexing of Resource Block group in this bunch, multiplex distance is lower than the 1st group, thereby the priority of the 2nd group of Resource Block group is come after the 1st group of Resource Block group.The allocation result of this Resource Block group is as shown in table 2, and Resource Block group from high to low sequence arrangement according to priority in the sector is middlely separated with "/", and behind multiplexing the finishing of Resource Block group, the Resource Block set of dispense schematic diagram of each sector as shown in Figure 3 for the second time.
Table 2
Distribute for the third time: to bunch in each sector of each sub-district carry out the distribution of the 3rd group of Resource Block group, the priority of the Resource Block group of distributing in each sector is set, the priority of the 3rd group of Resource Block group being assigned in each sector the 2nd group of Resource Block group of priority ratio in sector is separately taken second place.The 3rd group of Resource Block set of dispense carried out in each sector, and distribution method is:
Because the 3rd group of Resource Block group is Resource Block group multiplexing once more in this bunch, multiplex distance is lower than the 1st, 2 group, thereby the priority of the 3rd group of Resource Block group is come after the 1st, the 2 group of Resource Block group.The allocation result of this Resource Block group is as shown in table 3, and Resource Block group from high to low sequence arrangement according to priority in the sector is middlely separated with "/".
Table 3
The 4th sub-distribution: to bunch in each sector of each sub-district carry out the distribution of the 4th group of Resource Block group, the priority of the Resource Block group of distributing in each sector is set, the priority of the 4th group of Resource Block group being assigned in each sector the 3rd group of Resource Block group of priority ratio in sector is separately taken second place.The 4th group of Resource Block set of dispense carried out in each sector, and distribution method is:
Because the 4th group of Resource Block group is Resource Block group multiplexing once more in this bunch, multiplex distance is lower than the 1st, 2,3 group, thereby the priority of the 4th group of Resource Block group is come after the 1st, 2, the 3 group of Resource Block group.The allocation result of this Resource Block group is as shown in table 4, and Resource Block group from high to low sequence arrangement according to priority in the sector is middlely separated with "/", the 4th time the Resource Block group is multiplexing finish after, the Resource Block set of dispense schematic diagram of each sector is as shown in Figure 4.
Table 4
As can be seen from Table 4,4 groups of Resource Block groups that the same sector number of each sub-district distributes are identical, but use the prioritization difference.If the Resource Block group of respectively organizing in the same sector is not used order, completely random is used, and it is overlapping that serious Resource Block group then can take place, and increased annoyance level.And, reduced annoyance level owing in the above-mentioned distribution method, introduced priority, thereby can realize that extent for multiplexing changes with the capacity dynamic change.
In the above-described embodiment, be to bunch in the sub-district count N=4, the time-frequency combination planing method of the OFDMA system of sector number S=3, this method can be applied to that the sub-district number is N in any bunch, sector number is that the OFDMA system time frequency of S is united planning, and follow following principle: after N * S time group numbered in order, by the N sub-distribution and be that at every turn each sector distributes 1 Resource Block group, for distributing N Resource Block group in each sector, wherein, divide for the first time timing, to be numbered i, i+N, the time group correspondence of i+ (S-1) * N is distributed to each sector in the i sub-district, wherein, 1≤i≤N; Each branch timing later on, be each sector is distributed in the M sub-district time group be preceding once be the time group that respective sectors is distributed in the M+1 sub-district, be each sector is distributed in the N sub-district time group be preceding once be the time group that respective sectors is distributed in the 1st sub-district, wherein, 1≤M＜N.
In another embodiment of the present invention, to bunch in carry out the Resource Block group between each sector, sub-district distribution need repeatedly repeat, till the Resource Block group number that distributes in each sector is N, and newly assigned Resource Block group is to determine like this in the sector: when the Resource Block group number that has distributed in each sector of each sub-district is 0, for distributing one group of mutually different Resource Block group respectively in each sector of each sub-district; When the Resource Block group number that has distributed in each sector of each sub-district during less than N, distribute as follows: (each sector among 1≤i≤N) is multiplexing h sub-district (1≤h≤N respectively in the i sub-district, h ≠ i, and h local resource piece group never is multiplexed to the i sub-district) sector of the identical numbering Resource Block group of having distributed.Prioritization between newly multiplexing Resource Block group is constant, but priority comes after those Resource Block groups of having distributed.When carrying out the Resource Block set of dispense, repeat with the Resource Block group of having distributed if run into newly assigned Resource Block group, then no longer this Resource Block group is joined in the Resource Block group of this time distributing to the sector.When carrying out the Resource Block set of dispense, also can distribute according to the traffic carrying capacity size needs of each sector, as, traffic carrying capacity hour, when 1 group of Resource Block group just can satisfy business need, can only carry out the distribution of first resource piece group, follow-up increase according to traffic carrying capacity can be carried out the repeatedly distribution of Resource Block group successively.
When the base station in the sub-district need be for the service provisioning running time-frequency resource, the priority order from high to low of the time group that is assigned to according to each sector in the sub-district, place, base station used to required business the time assignment in the time group.Use order for the Resource Block in the same Resource Block group can preestablish, as, the order of setting can be random sequence, number from big to small or order from small to large according to Resource Block.
By foregoing description as can be known, because the use of Resource Block group is carried out according to priority orders, the time-frequency combination planing method of the OFDMA system that provides by the above embodiment of the present invention, make the priority difference of the same resource block group number of distributing in the different sectors, thereby use the probability of same resource block greatly to reduce in the different sectors simultaneously, can effectively reduce annoyance level in the net, both adapt to the demand that traffic carrying capacity changes, can guarantee covering quality again.
In the running time-frequency resource planing method that the above embodiment of the present invention is described, can also further increase other householder methods, make that the scope of application of this running time-frequency resource dispatching method is more extensive, better effects if.For example, can adopt between each sector, same sub-district and use the Resource Block group temporarily, or/and other householder methods of the dynamic assignment of employing Resource Block group coverage etc. are carried out running time-frequency resource planning.
In another embodiment of the present invention, the Resource Block group between each sector, same sub-district can be used temporarily.As shown in Figure 5, sub-district B
iSector S
I, 1The traffic carrying capacity of (1≤i≤4) is bigger, use 2 groups of Resource Block groups (be numbered: 1/2), sector S
I, 2With sector S
I, 3Traffic carrying capacity less, current is used 1 group of Resource Block group, wherein sector S
I, 2Use is numbered 5 Resource Block group, sector S
I, 2Use is numbered 9 Resource Block group.As sector S
I, 1Traffic carrying capacity increase gradually, not obvious when need increasing the 3rd group of Resource Block group if other two sector traffic carrying capacitys change, according to above-mentioned dispatching method, should enable the 3rd priority Resource Block group 3.But in view of sector S
I, 2With sector S
I, 3In the Resource Block group 6 and 10 of the 2nd priority all be not used, and the annoyance level that uses the Resource Block group of the 2nd priority to bring will be lower than and uses the 3rd priority Resource Block group.Thereby this moment sector S
I, 1Can be to sector S
I, 2Use the idling-resource piece group 6 of its 2nd priority temporarily and (that is, sector S is distributed to Resource Block group 6 in the base station of this sub-district temporarily
I, 2Use), the Resource Block set of dispense schematic diagram of this sub-district is as shown in Figure 6 at this moment.As sector S
I, 1Traffic carrying capacity continue to increase, not obvious when needing to increase the 4th group of Resource Block group if other two sector traffic carrying capacitys still change, then this moment sector S
I, 1Can be to sector S
I, 3Use its 2nd priority idling-resource piece group 10, the Resource Block set of dispense schematic diagram of this sub-district as shown in Figure 7 at this moment temporarily.Sector S
I, 1Use priority and the sector S of next Resource Block group in former sector
I, 1The Resource Block group of middle lowest priority is identical, and keeps using the priority of the Resource Block group of coming, but is placed on sector S
I, 1Use after the Resource Block group of middle equal priority.
By foregoing description as can be known, the introducing of Resource Block group priority has realized that reusing degree is with the capacity dynamic change, adapted to the dynamic change of network capacity, the interim borrowing method of Resource Block group has then strengthened capacity adaptive capacity pockety between different sectors in the sub-district, and the adaptive capacity of the professional acute variation in sector.
Because reusing degree difference, the annoyance level of different priorities Resource Block group are also different in each sector.Thereby, can also carry out dynamic assignment to Resource Block group coverage in order to improve the multiplex distance of low priority resources piece group.
In another embodiment of the present invention, be provided with two kinds of methods for the Resource Block coverage in the same Resource Block group: (1) with the coverage method, that is: each Resource Block covers identical zone; (2) different coverage methods are promptly pressed the far and near subregion of further dividing apart from the base station, according to the priority assignment subregion of reality use in the overlay area.Base station in the sub-district can adopt first method that the coverage of Resource Block group is set earlier, when traffic carrying capacity changes, when needing to adjust Resource Block group use number, correspondingly adjusts the overlay area of using the Resource Block group again.In the second approach, cell base station is counted n according to the Resource Block group of using in this sector and apart from the distance of base station, this sector can be divided into this sector reality at n identical strip region of the Resource Block group quantity of usefulness, and according to priority ordering, the overlay area of distributes resource blocks group from outside to inside successively from high to low.The outer collar region of the Resource Block group coverage sector of high priority, the Resource Block group coverage sector inner circle area of low priority.The multiplex distance of low priority resources piece group is little, distributes closely overlay area, has reduced operating power, has reduced annoyance level, has promoted covering quality.
Below in conjunction with sub-district B in the system of above-mentioned N=4, S=3
1Further specify the dynamic adjustment process of coverage for example:
As shown in Figure 8, according to the traffic carrying capacity needs, sub-district B
1One group of Resource Block group is all used in interior each sector, and this moment, the coverage of Resource Block group was whole sector;
As shown in Figure 9, according to the traffic carrying capacity needs, sub-district B
1Interior each sector all needs to use two groups of Resource Block groups, and each sector also is divided into inside and outside two parts zone.High priority Resource Block group 1,5,9 covers perimeter, sector separately, and low priority resources piece group 2,6,10 covers sector interior zone separately;
As shown in figure 10, according to the traffic carrying capacity needs, sub-district B
1In each sector all need to use three groups of Resource Block groups, that each sector is divided into accordingly is interior, in, outer three subregions.High priority Resource Block group 1,5,9 covers perimeter, sector separately, and the 2nd priority Resource Block group 2,6,10 covers sector central region separately, and the 3rd priority Resource Block group 3,7,11 covers sector interior zone separately;
As shown in figure 11, according to the traffic carrying capacity needs, sub-district B
1Four groups of Resource Block groups are all used in interior each sector, and four subregions are divided by the distance base station distance in each sector, correspondingly give the Resource Block group of different priorities.
For the various embodiments described above of the present invention, what need illustrate a bit is: the OFDMA frame is divided into uplink frame, downlink frame, and the frame of each direction can be divided into service bearer, management and control etc. and have different coverings and capacity characteristic part.At the different requirements of different parts in the OFDMA system-frame, can carry out independent Resource Block planning respectively according to the method that the above embodiment of the present invention proposed.
For the various embodiments described above of the present invention, if the sub-district number is that N, sector number are that number of resource blocks is M, is designated as SC in the OFDMA system of S in any bunch
1, SC
2..., SC
M, M Resource Block is divided into N * S group, then the number of resource blocks L in each Resource Block group is
Expression is not more than the maximum integer of x, according to 1,2 ..., N * S is numbered Resource Block group i={SC to the Resource Block group
I-1* L+1, SC
I-1* L+2 ..., SC
i* L}, (1≤i≤N * S).Thus, also have M-L * N * S Resource Block not to be assigned in the Resource Block group, cell base station can be used for the dilatation of heavy traffic base station, indoor covering or other purposes with these Resource Block.
It may be noted that in addition a bit: the various embodiments described above of the present invention are to be that example describes with OFDMA, but method of the present invention is equally applicable to other ofdm system.
Based on identical technical conceive, the embodiment of the invention also provides the dispatching patcher of running time-frequency resource in a kind of ofdm system.
Referring to Figure 12, the structural representation of the dispatching device 1 of the ofdm system kind running time-frequency resource that provides for the embodiment of the invention, this device comprises: resource distribution module 11, scheduling of resource module 12, this dispatching device 1 can be located at base station equipment.In this dispatching device 1:
Scheduling of resource module 12 is used for the priority order from high to low of the time group that is assigned to according to each sector, sub-district, dispatching device 1 place, uses to required business the time assignment in the time group.
The time group that is assigned in certain sector of sub-district, scheduling of resource module 12 place is not enough to provide data transmission capacity, and also exist in the time group that is assigned in other sectors of this sub-district with described certain sector in during the at the same level and idle time group of the time group of lowest priority, scheduling of resource module 12 is given described certain sector with the time set of dispense of free time and is kept the priority of idle time group, and the time group of free time is used have other time groups of equal priority with it after.
Above-mentioned scheduling of resource module 12 also can be according to the time group quantity in each sector that is assigned to the sub-district, place, in this cell coverage area be with the base station center from inside to outside separately each sector in the sub-district be divided into the belt-like zone of respective numbers, according to priority order from high to low, successively the time set of dispense is given belt-like zone from outside to inside.
When available running time-frequency resource comprises M time, comprise L time in each time group, wherein, L is for being no more than M/ (during the maximum integer of the institute's value of N * S); Above-mentioned scheduling of resource module 12 can be given the resource block reservations except that N * S time group in the described available running time-frequency resource other professional uses of appointment.
In sum, the above embodiment of the present invention realizes the running time-frequency resource scheduling at the time-frequency two-dimensional characteristic of OFDM/OFDMA resource management on the basis of the time-frequency two-dimensional of Resource Block being united planning.The present invention program has realized planning separately and scheduling of resource having different the covering with the channel of capacity requirement in consolidated network, and support resource piece group extent for multiplexing is less with dynamic change, the co-channel interference of power system capacity, and realize simple, for whole network, planning can realize in a step, stronger to covering with the dynamic change adaptability of capacity, when changing, the business of this network and capacity do not need network is reconfigured.In the prior art to adopt traditional be the frequency planning and the scheduling scheme of unit with the carrier wave more, the granularity of its planning and scheduling is too thick, can't control the minizone co-channel interference, the above embodiment of the present invention is by planning at the time-frequency two-dimensional characteristic of OFDM/OFDMA resource management and on this basis scheduling of resource, time resource is taken into account, reduce the planning granularity, improved the interference suppressioning effect of minizone.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1, the dispatching method of running time-frequency resource in a kind of ofdm system, it is characterized in that, according to bunch number of cells N that is comprised in the described system and the number of sectors S that each sub-district is comprised, available running time-frequency resource is divided into N * S time group in advance;
When carrying out time-frequency resource allocating, actual volume according to each sector, to partly or entirely distribute to each sector in each sub-district in described N * S the time group, wherein, different for the time group that each sector is distributed, the priority of the time group that the time group is different and each sector is assigned to that is assigned in each sector is provided with from high to low according to the sequencing that distributes;
The priority order from high to low of the time group that the base station in each sub-district is assigned to according to each sector in the sub-district, place uses to required business the time assignment in the time group.
2, the method for claim 1 is characterized in that, will partly or entirely distribute to each sub-district in described N * S the time group, is specially:
Distribute the time group by N time for each sector, with whole each sub-district of distributing in described N * S the time group;
Perhaps, distribute the time group for each sector, the part in described N * S the time group is distributed to each sub-district by M time, wherein, 1≤M＜N.
3, the method for claim 1 is characterized in that, after distributing the time group for each sector, also comprises:
If the time group that is assigned in first sector of a sub-district is not enough to provide data transmission capacity, and also exist in the time group that is assigned in other sectors of this sub-district with described first sector in the at the same level and idle time group of time group of lowest priority, then the base station of this sub-district is given described first sector with the time set of dispense of described free time and is kept the priority of described idle time group, and the time group of described free time is used after other time groups that have equal priority with it are assigned.
4, the method for claim 1 is characterized in that, after distributing the time group for each sector, also comprises:
The base station of each sub-district is according to the time group quantity of distributing in its sector, in its coverage with this base station be the center from inside to outside will be separately each sector in the sub-district be divided into the belt-like zone of respective numbers, according to priority order from high to low, successively the time set of dispense is given belt-like zone from outside to inside.
5, the method for claim 1 is characterized in that, described available running time-frequency resource comprises M time, comprises L time in each time group, and wherein, L is for being no more than the M/ (maximum integer of institute's value of N * S);
The base station of each sub-district uses to the business of regulation the Resource Block assignment except that N * S time group in the described available running time-frequency resource.
6, the dispatching device of running time-frequency resource in a kind of ofdm system is characterized in that, comprising:
The resource distribution module, be used to receive and store available running time-frequency resource information, described available running time-frequency resource information comprises the part or all of time group information in N * S the time group, wherein, different for the time group that each sector is distributed, the priority of the time group that the time group is different and each sector is assigned to that is assigned in each sector is provided with from high to low according to the sequencing that distributes; Wherein, N is a number of cells, and S is the number of sectors that each sub-district comprised;
The scheduling of resource module is used for the priority order from high to low of the time group that is assigned to according to each sector, sub-district, this dispatching device place, uses to required business the time assignment in the time group.
7, device as claimed in claim 6, it is characterized in that, described resource distribution module is further used for, and by receiving N resource distribution process, the whole time group information configuration in described N * S the time group is given the sub-district at this dispatching device place; Perhaps, by receiving M time resource distribution process, with the sub-district of the part time group information configuration in described N * S the time group to this dispatching device place, wherein, 1≤M＜N.
8, device as claimed in claim 6, it is characterized in that, described scheduling of resource module is further used for, the time group that is assigned in first sector of sub-district, place is not enough to provide data transmission capacity, and also exist in the time group that is assigned in other sectors of this sub-district with described first sector in during the at the same level and idle time group of the time group of lowest priority, give described first sector with the time set of dispense of described free time and keep the priority of described idle time group, and the time group of described free time is used after other time groups that have equal priority with it are assigned.
9, device as claimed in claim 6, it is characterized in that, described scheduling of resource module is further used for, according to the time group quantity in each sector that is assigned to the sub-district, place, in this cell coverage area be with the base station center from inside to outside separately each sector in the sub-district be divided into the belt-like zone of respective numbers, according to priority order from high to low, successively the time set of dispense is given belt-like zone from outside to inside.
10, device as claimed in claim 6 is characterized in that, described available running time-frequency resource comprises M time, comprises L time in each time group, and wherein, L is for being no more than the M/ (maximum integer of institute's value of N * S);
Described scheduling of resource module is further used for, and the resource block reservations except that N * S time group in the described available running time-frequency resource is given other professional uses of appointment.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102118752A (en) * | 2009-12-31 | 2011-07-06 | 中国移动通信集团设计院有限公司 | Method and device for interference control and coordination |
| WO2011079642A1 (en) * | 2009-12-31 | 2011-07-07 | 中兴通讯股份有限公司 | Method, system and base station for mapping cell resources |
| CN101801091B (en) * | 2010-01-28 | 2012-11-14 | 北京邮电大学 | Method and device for allocating resources in OFDM/MIMO system |
| CN109005595A (en) * | 2018-06-29 | 2018-12-14 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The method of adaptively selected multichannel self-organizing network time frequency block |
| CN111147216A (en) * | 2018-11-03 | 2020-05-12 | 上海朗帛通信技术有限公司 | Method and apparatus in a node used for wireless communication |
| CN112566067A (en) * | 2020-12-04 | 2021-03-26 | 兰州理工大学 | TDMA-OFDM combined safety information transmission channel resource block allocation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102118752A (en) * | 2009-12-31 | 2011-07-06 | 中国移动通信集团设计院有限公司 | Method and device for interference control and coordination |
| WO2011079642A1 (en) * | 2009-12-31 | 2011-07-07 | 中兴通讯股份有限公司 | Method, system and base station for mapping cell resources |
| CN102118752B (en) * | 2009-12-31 | 2013-04-03 | 中国移动通信集团设计院有限公司 | Method and device for interference control and coordination |
| CN102118868B (en) * | 2009-12-31 | 2015-10-21 | 中兴通讯股份有限公司 | Cell resources in cooperative measurement set during multipoint cooperative transmission mapping method and system |
| CN101801091B (en) * | 2010-01-28 | 2012-11-14 | 北京邮电大学 | Method and device for allocating resources in OFDM/MIMO system |
| CN109005595A (en) * | 2018-06-29 | 2018-12-14 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | The method of adaptively selected multichannel self-organizing network time frequency block |
| CN109005595B (en) * | 2018-06-29 | 2022-08-30 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Method for self-adaptively selecting multi-channel self-organizing network time frequency block |
| CN111147216A (en) * | 2018-11-03 | 2020-05-12 | 上海朗帛通信技术有限公司 | Method and apparatus in a node used for wireless communication |
| CN111147216B (en) * | 2018-11-03 | 2022-08-19 | 上海朗帛通信技术有限公司 | Method and apparatus in a node used for wireless communication |
| CN112566067A (en) * | 2020-12-04 | 2021-03-26 | 兰州理工大学 | TDMA-OFDM combined safety information transmission channel resource block allocation method |
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