CN101052196A - Base station of orthogonal frequency division multiplex system and dispath method for it small area carrier resource - Google Patents
Base station of orthogonal frequency division multiplex system and dispath method for it small area carrier resource Download PDFInfo
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- CN101052196A CN101052196A CNA2006100750200A CN200610075020A CN101052196A CN 101052196 A CN101052196 A CN 101052196A CN A2006100750200 A CNA2006100750200 A CN A2006100750200A CN 200610075020 A CN200610075020 A CN 200610075020A CN 101052196 A CN101052196 A CN 101052196A
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Abstract
The method comprises: for the mobile station sitting in center of the local cell, determining its neighboring cells appointed by the beam when a beam-forming is made for it; determining the sub-carrier set (Fe, to) used by the edge location of the neighboring cells; assigning the sub-carrier set (Fe, to) and the carrier resources out of the sub-carrier set (Fe, in) used by the edge location of the local cell for the mobile station in priority. The invention also reveals a base station using the method thereof.
Description
Technical field
The present invention relates to OFDM (Orthogonal Frequency Division Multiplexing, OFDM) OFDMA of technology (Orthogonal Frequency Division Multiplexing Access, OFDM) multi-access mode relates in particular to the method for the dispatching method of sub-district carrier resource in the mobile communication system that adopts OFDMA and the base station that this method is used.
Background technology
In LTE (Long Term Evolution, Long Term Evolution project) physical-layer techniques discussion and evolution, the OFDM technology has become one of adopted mainstream technology of possibility.The cardinal principle of OFDM technology is high-speed data-flow is passed through string and conversion, forms a plurality of low speed datas streams parallel transmission on a plurality of orthogonal sub-carriers, thereby reduces intersymbol interference effectively, the raising availability of frequency spectrum.
When adopting the OFDMA multi-access mode, if contiguous different user terminals has distributed identical subcarrier will cause the phase mutual interference.For the travelling carriage in the same sub-district (MS, Mobile Station), base station (BS, Base Station) can distribute different subcarriers for it, with the interference between reduction or elimination travelling carriage.And how to guarantee to make full use of under the condition of system resource, suppress the interference of travelling carriage between different districts effectively, become the focus of present discussion.
The method that reduces presence of intercell interference mainly contains frequency soft multiplexing technology and antenna beam figuration technology.
In the frequency soft multiplexing technology, the sub-district is divided into marginal position and centre position, wherein marginal position is for may cause the territorial scope that interferes with each other with the marginal position of other sub-districts, and all the other are the centre position of sub-district.The principle of down direction frequency soft multiplexing technology as shown in Figure 1, BS1, BS2 and BS3 are respectively the base station of sub-district 1,2 and 3, mobile station MS 12, MS22 and MS32 lay respectively at the centre position of sub-district 1,2 and 3, and mobile station MS 11, MS21 and MS31 lay respectively at the marginal position of sub-district 1,2,3.Each sub-district uses different sub-carrier set to be combined into mobile station MS 11, MS21 and the MS31 distributing carrier wave resource of marginal position respectively, as the subcarrier set of filling with oblique line among Fig. 1, to reduce or to eliminate phase mutual interference between them.To mobile station MS 12, MS22 and the MS32 in centre position, sub-district, allocation of subcarriers arbitrarily, as among Fig. 1 with the subcarrier set of a filling, by the transmitting power of suitable these travelling carriages of reduction, utilize signal attenuation can alleviate interference to neighbor cell.
The signal bondage of antenna beam figuration technology by will sending to travelling carriage reduces the interference to the travelling carriage of other non-beam coverage area in a narrower beam coverage.Because signal is within the specific limits restrained, the travelling carriage of non-overlay area can be interfered hardly; Owing to the decay of signal, the influence that distance travelling carriage far away is subjected to is also very little simultaneously, thereby the wave beam forming technology has better action for suppressing presence of intercell interference.
In the prior art frequency soft multiplexing technology and antenna beam figuration technology are combined use.Yet, even use this two kinds of technology simultaneously, in the interference that still may cause the minizone in some cases.For example in Fig. 2, mobile station MS 211 and mobile station MS 222 belong to sub-district 1 and sub-district 2 respectively, the zone of dot-hatched is the marginal position of each sub-district in the sub-district 1 and 2, and the triangle shadow region is sub-district 1 when sending downstream signals for mobile station MS 211, the beam coverage area of formation; MS222 is positioned at the mobile station MS 222 of sub-district 2 marginal positions owing in beam coverage, when mobile station MS 211 had used identical subcarrier with MS222, will be interfered.Because the travelling carriage that is positioned at the centre position, sub-district is allocation of subcarriers arbitrarily, thereby the situation of presence of intercell interference can appear inevitably.
Summary of the invention
What the present invention will solve is the problem that causes presence of intercell interference in the prior art for any allocation of subcarriers of travelling carriage that is positioned at the centre position, sub-district.
The dispatching method of sub-district carrier resource may further comprise the steps in the ofdm system of the present invention:
A) to the travelling carriage in this centre position, sub-district, the neighbor cell of beam position when determining that it is carried out figuration;
B) determine the employed subcarrier set of described neighbor cell marginal position F
E, to
C) be preferably this travelling carriage allocation of subcarriers set F
E, toWith the employed subcarrier set in this cell edge position F
E, inOutside the available carrier wave resource.
Preferably, described method also comprises:
D) group carrier set F
E, inAnd F
E, toOutside available carrier wave resource when being less than the user demand of this travelling carriage, judge this sub-district in this dispatching cycle whether also scheduling be positioned at the travelling carriage of marginal position, if, insufficient section priority allocation subcarrier set F
E, toThe available carrier wave resource; If not, insufficient section priority allocation subcarrier set F
E, inThe available carrier wave resource.
Preferably, also comprise after the described step a):
Receive the travelling carriage schedule information of the current marginal position of described neighbor cell;
If the current not scheduling of described neighbor cell is positioned at the travelling carriage of marginal position, be preferably this travelling carriage allocation of subcarriers set F
E, inOutside the available carrier wave resource.
Preferably, also comprise between described step b) and the step c): if described neighbor cell surpasses 1, when wherein there being the sub-district current when scheduling is positioned at the travelling carriage of marginal position, at subcarrier set F
E, toIn leave out this employed subcarrier in cell edge position.
Preferably, described method also comprises:
Determine the position of travelling carriage in this sub-district;
To the travelling carriage of this cell edge position, from subcarrier set F
E, inIn be this travelling carriage distributing carrier wave resource.
Preferably, the position of described travelling carriage in this sub-district by calculating this travelling carriage pilot frequency information intensity and arrival bearing or determine by the path loss information that this travelling carriage reports.
Preferably, described when travelling carriage is carried out figuration the neighbor cell of beam position determine according to the arrival bearing of this travelling carriage.
The present invention also provides the base station in a kind of ofdm system, comprises neighbor cell module, neighbor cell sub-carrier block, carrier resource distribution module, wherein:
The neighbor cell of beam position when the travelling carriage that the neighbor cell module is used for being defined as being positioned at this centre position, sub-district carries out wave beam forming;
The neighbor cell sub-carrier block is used for determining the employed subcarrier set of the marginal position F of the neighbor cell of described beam position
E, to
The carrier resource distribution module is used for according to F
E, toWith the employed subcarrier set in this cell edge position F
E, inBe this travelling carriage distributing carrier wave resource, distribution method comprises priority allocation F
E, toAnd F
E, inOutside the available carrier wave resource.
Preferably, described base station also comprises neighbor cell Real-Time Scheduling module, is used for receiving the travelling carriage schedule information of the current marginal position of described neighbor cell;
The neighbor cell travelling carriage schedule information of neighbor cell sub-carrier block reception of neighboring cell Real-Time Scheduling module output will not dispatched the employed subcarrier of marginal position of sub-district of marginal position travelling carriage from F in the described neighbor cell
E, toMiddle deletion.
Preferably, the distribution method of described carrier resource distribution module also comprises: work as F
E, inAnd F
E, toOutside available carrier wave resource when being less than the user demand of this travelling carriage, if the travelling carriage that is positioned at marginal position is not dispatched in this sub-district in this dispatching cycle, insufficient section priority allocation subcarrier set F
E, inThe available carrier wave resource; Otherwise work as F
E, toWhen being not empty set, insufficient section priority allocation subcarrier set F
E, toThe available carrier wave resource.
The present invention is not by distribute the employed subcarrier of marginal position of the neighbor cell of its beam position as far as possible for the travelling carriage in centre position, sub-district, make the travelling carriage in centre position, sub-district be operated in different carrier frequencies as far as possible, reduced the interference of minizone with the travelling carriage of the marginal position of the neighbor cell that may disturb;
Further, the present invention will not carry out the travelling carriage of the employed marginal position allocation of carriers of neighbor cell of marginal position travelling carriage scheduling to this sub-district by knowing the scheduling of resource situation of neighbor cell in real time, has increased the flexibility of carrier resource scheduling.
Description of drawings
Fig. 1 is the principle schematic of down direction frequency soft multiplexing technology;
The schematic diagram of beam coverage when Fig. 2 carries out figuration for the travelling carriage to the centre position, sub-district;
Fig. 3 is the flow chart of carrier resource dispatching method embodiment one of the present invention;
The schematic diagram of beam position neighbor cell when Fig. 4 carries out figuration for the travelling carriage to the centre position, sub-district;
Fig. 5 is the flow chart of carrier resource dispatching method embodiment two of the present invention;
The structural representation of Fig. 6 base station of the present invention.
Embodiment
In the prior art, the frequency soft multiplexing technology has only been considered the problem of phase mutual interference between the travelling carriage of neighbor cell marginal position, the wave beam forming technology has only been considered the problem disturbed between the inner travelling carriage in same sub-district, and the wave beam of not considering the travelling carriage in centre position, a sub-district can cause the problem of interference to the marginal position of neighbor cell in its coverage.When the travelling carriage to the centre position, sub-district carries out the carrier resource scheduling, if, just can avoid interference to neighbor cell marginal position travelling carriage for its carrier wave that distributes the marginal position different frequency of the neighbor cell that covers with this sub-district and its wave beam.
In ofdm system, the carrier resource of sub-district is dispatched to carry out certain dispatching cycle.In each dispatching cycle, determine travelling carriage set and available carrier wave resource collection that this dispatching cycle will be serviced earlier, carry out resource allocation again; Whenever finish the resource allocation of a travelling carriage, just with its deletion from set, and will from the available carrier wave resource collection, delete for the subcarrier of its distribution, all travelling carriages have all carried out finishing after the resource allocation this scheduling in all resources have assigned or gathered.When the present invention is certain travelling carriage Resources allocation in dispatching cycle,, also to consider the position of other travelling carriages in the travelling carriage set of this dispatching cycle except considering the position of this travelling carriage.
The flow process of sub-district carrier resource dispatching method embodiment one among the present invention shown in Figure 3 at step S301, is determined position of each travelling carriage in scheduled mobile stations set and the set in this dispatching cycle, this sub-district.
At step S302, determine the available carrier wave resource of this sub-district in this dispatching cycle.
At step S303, determine current scheduled mobile stations.
At step S304, whether judge travelling carriage in the centre position of this sub-district, if, execution in step S305; If not, change step S312.The position of travelling carriage in the sub-district can be judged by the intensity and the arrival bearing of pilot frequency information of measuring and calculating travelling carriage in the base station among the present invention, also can draw the position of travelling carriage in the sub-district by the path loss information that travelling carriage reports.
At step S305, wave beam neighbor cell pointed when determining that this travelling carriage carried out figuration.A kind of possible method is defined as its shaped-beam sub-district pointed for the arrival bearing according to this mobile station signal.
The wave beam that the base station is sent to a travelling carriage may point to a neighbor cell, also may point to two neighbor cells, and this is relevant with travelling carriage residing position in the sub-district.As shown in Figure 4, some boundary points meeting while and two other sub-district adjacency of sub-district 1, during when the line sensing of this cell base station and travelling carriage or near these boundary points, as the mobile station MS in the sub-district 1 422, wave beam can point to sub-district 4 and sub-district 5 simultaneously during to this travelling carriage figuration; And when the linking to these boundary points certain deviation is arranged of this cell base station and travelling carriage, as the mobile station MS in the sub-district 1 411, wave beam only can point to sub-district 2 during to its figuration.
All applicable in the present embodiment to the situation of neighbor cell of beam position and two neighbor cells of sensing.
Get back to Fig. 3,, determine the employed subcarrier set in this cell edge position F at step S306
E, in, and the employed subcarrier set of the neighbor cell marginal position of beam position F
E, to
When adopting the frequency soft multiplexing technology, the marginal position of each abutting subdistrict uses the subcarrier set that does not coincide.The base station of each sub-district can use the mode of information to learn the employed subcarrier of abutting subdistrict marginal position by exchange resource to each other, also can the relevant information of this sub-district be reported intermediate node by each sub-district, as aGW (Access Gateway, and obtain the relevant information of other abutting subdistricts from intermediate node IAD).AGW is the upper layer node of base station in the LTE system, and an aGW may be connected with a plurality of base stations simultaneously, and the data channel that is connected to core network is provided for the base station.
At step S307, be preferably this travelling carriage and distribute set F
E, inAnd F
E, toOutside available subcarrier.In other words, being preferably this travelling carriage distributes in available carrier wave set and does not belong to F
E, inAnd F
E, toSubcarrier.
At step S308, judge F
E, inAnd F
E, toOutside available subcarrier whether can satisfy of the user demand of this travelling carriage to subcarrier, if change step S313; If not, execution in step S309.
At step S309, judge whether this sub-district dispatches the travelling carriage that is positioned at marginal position in this dispatching cycle, whether comprise the travelling carriage that is positioned at marginal position in the promptly current travelling carriage set that is scheduled, if, execution in step S311, if not, execution in step S310.
At step S310, preferentially this travelling carriage allocation of subcarriers is gathered F
E, inIn the available carrier wave resource, change step S313.
At step S311, be preferably this travelling carriage allocation of subcarriers set F
E, toIn the available carrier wave resource, change step S313.
At step S312, for being in this travelling carriage allocation of subcarriers set F of this cell edge position
E, inIn the available carrier wave resource.
At step S313, judge whether whether travelling carriage in this of travelling carriage set has all been dispatched dispatching cycle or resource assigns, if, execution in step S315; If not,, execution in step S314.
At step S314, the travelling carriage of this Resources allocation is deleted from the scheduled mobile stations set, after the subcarrier that has distributed is deleted, change step S302, for next one travelling carriage to be scheduled carries out scheduling of resource from the available carrier wave resource collection.
At step S315, this carrier resource scheduling dispatching cycle finishes, and scheduled mobile stations is in the enterprising line data transmission of the subcarrier that is its distribution.The available subcarrier set is reverted to the subcarrier set that all can be used for transmitting data.
In embodiment one, the current utilization of resources situation of the neighbor cell of beam position has not been considered in each sub-district when allocation of subcarriers.Though in this sub-district the beam position of certain travelling carriage neighbor cell, if but the current travelling carriage that does not have scheduling to be in marginal position of this neighbor cell, even this travelling carriage in this sub-district uses the carrier wave with the same frequency of this neighbor cell marginal position, can not cause interference yet.Among the embodiment two of dispatching method the current resource operating position of neighbor cell is taken into account in the present invention, made that the distribution of carrier resource is more flexible.
The flow process of embodiment two at step S501, is determined position of each travelling carriage in scheduled mobile stations set and the set in this dispatching cycle, this sub-district as shown in Figure 5.
At step S502, the travelling carriage schedule information of the current marginal position of neighbor cell that received beam points to.Comprise in the travelling carriage schedule information of sub-district whether current this sub-district has dispatched the travelling carriage that is positioned at marginal position.
Know that with this sub-district among the embodiment one other employed subcarriers in cell edge position are similar, the base station of each sub-district can be learnt the travelling carriage scheduling situation of abutting subdistrict marginal position by the mode that exchanges current resource scheduling information to each other, also can the relevant Real-Time Scheduling information of this sub-district be reported intermediate node by each sub-district, as aGW, and obtain the relevant Real-Time Scheduling information of other abutting subdistricts from intermediate node.
At step S503, determine the available carrier wave resource of this sub-district in this dispatching cycle.
At step S504, determine current scheduled mobile stations.
At step S505, whether judge travelling carriage in the centre position of this sub-district, if, execution in step S506; If not, change step S517.
At step S506, wave beam neighbor cell pointed when determining that this travelling carriage carried out figuration.
At step S507, judge that whether not the current scheduling of neighbor cell is positioned at the travelling carriage of its marginal position, promptly is not in the travelling carriage requests resource allocation of marginal position and/or is using carrier resource, if change step S516 in the neighbor cell; If not, execution in step S508.
When the neighbor cell of beam position comprised more than one sub-district, when having only the current travelling carriage of all not dispatching marginal position in each sub-district, the judged result of this step was just for being.
At step S508, determine the employed subcarrier set in this cell edge position F
E, in, and the employed subcarrier set of the neighbor cell marginal position of beam position F
E, to
When the neighbor cell of beam position surpassed 1, execution in step S509 judged whether current sub-district of not dispatching the marginal position travelling carriage is arranged in the neighbor cell, if, execution in step S510; If not, change step S511.
To current sub-district of not carrying out the scheduling of marginal position travelling carriage in the neighbor cell, the employed subcarrier set of its marginal position can be used for distributing to this travelling carriage in this sub-district, and can not cause interference to this neighbor cell.Therefore at step S510, the deletion subcarrier is gathered F
E, toIn the employed subcarrier of marginal position of this neighbor cell.
At step S511, be preferably this travelling carriage and distribute set F
E, inAnd F
E, toOutside available subcarrier.
At step S512, judge F
E, inAnd F
E, toOutside available subcarrier set whether can satisfy of the user demand of this travelling carriage to subcarrier, if change step S518; If not, execution in step S513.
At step S513, judge whether this sub-district dispatches the travelling carriage that is positioned at marginal position in this dispatching cycle, whether comprise the travelling carriage that is positioned at marginal position in the promptly current travelling carriage set that is scheduled, if, execution in step S515, if not, execution in step S514.
At step S514, preferentially this travelling carriage allocation of subcarriers is gathered F
E, inIn the available carrier wave resource, change step S518.
At step S515, be preferably this travelling carriage allocation of subcarriers set F
E, toIn the available carrier wave resource, change step S518.
At step S516,, be preferably this travelling carriage allocation of subcarriers set F in this sub-district when all neighbor cells are current when all the travelling carriage of marginal position not being dispatched
E, inOutside the available carrier wave resource, change step S518.
At step S517, for being in this travelling carriage allocation of subcarriers set F of this cell edge position
E, inIn the available carrier wave resource.
At step S518, judge whether whether travelling carriage in this of travelling carriage set has all been dispatched dispatching cycle or resource assigns, if, execution in step S520; If not, execution in step S519.
At step S519, the travelling carriage of this Resources allocation is deleted from the scheduled mobile stations set, after the subcarrier that has distributed is deleted, change step S504, for next one travelling carriage to be scheduled carries out scheduling of resource from the available carrier wave resource collection.
At step S520, this carrier resource scheduling dispatching cycle finishes, and scheduled mobile stations is in the enterprising line data transmission of the subcarrier that is its distribution.The available subcarrier set is reverted to the subcarrier set that all can be used for transmitting data.
Figure 6 shows that the structural representation of using the base station of carrier resource dispatching method among the present invention, neighbor cell sub-carrier block 630 is connected with carrier resource distribution module 640 with neighbor cell module 610, neighbor cell Real-Time Scheduling module 620 respectively.
When the base station was the travelling carriage distributing carrier wave resource in this centre position, sub-district, the wave beam when by neighbor cell module 610 bases this travelling carriage being carried out figuration was determined the neighbor cell of beam position.
Whether the travelling carriage schedule information of the current marginal position of neighbor cell that neighbor cell Real-Time Scheduling module 620 received beams point to dispatches the travelling carriage that is positioned at its marginal position comprising current neighbor cell.Neighbor cell Real-Time Scheduling module 620 is optional module.
The neighbor cell that neighbor cell sub-carrier block 630 is determined according to neighbor cell module 610, the employed subcarrier of marginal position that generates these neighbor cells is gathered F
E, toWhen the base station comprises neighbor cell Real-Time Scheduling module 620, according to the neighbor cell current mobile station schedule information of neighbor cell Real-Time Scheduling module 620 output, in the neighbor cell of neighbor cell sub-carrier block 630 with beam position current sub-district of not carrying out the marginal position scheduling at the employed subcarrier of marginal position from set F
E, toMiddle deletion.
Receive the set F of neighbor cell sub-carrier block 630 outputs
E, to, carrier resource distribution module 640 is according to F
E, toGather F with the subcarrier that use this cell edge position
E, inCarrying out carrier resource distributes.Carrier resource distribution module 640 priority allocation subcarriers set F
E, inAnd F
E, toOutside the available carrier wave resource; Work as F
E, inAnd F
E, toOutside available carrier wave resource when being less than the user demand of this travelling carriage, judge whether this sub-district carries out the marginal position scheduling in this dispatching cycle, if not, insufficient section priority allocation subcarrier set F
E, inThe available carrier wave resource.If carry out the marginal position scheduling, work as F
E, toWhen being not empty set, insufficient section priority allocation subcarrier set F
E, toThe available carrier wave resource; If F
E, toBe empty set, then can be for the only surplus set F of the carrier wave of this cell allocation
E, inIn available subcarrier, this moment can be according to other conditional decisions of the prior art distributing carrier wave resource between the travelling carriage of the travelling carriage in centre position and marginal position how.
The present invention by carrier resource dispatching method reasonable in design, has further suppressed the interference of minizone effectively on the basis that frequency soft multiplexing technology and wave beam forming technology combine.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection range of the present invention.
Claims (10)
1. the dispatching method of sub-district carrier resource in the orthogonal frequency division multiplex OFDM system is characterized in that, may further comprise the steps:
A) to the travelling carriage in this centre position, sub-district, the neighbor cell of beam position when determining that it is carried out figuration;
B) determine the employed subcarrier set of described neighbor cell marginal position F
E, to
C) be preferably this travelling carriage allocation of subcarriers set F
E, toWith the employed subcarrier set in this cell edge position F
E, inOutside the available carrier wave resource.
2. the distribution method of sub-district carrier resource in the ofdm system according to claim 1 is characterized in that described method also comprises:
D) group carrier set F
E, inAnd F
E, toOutside available carrier wave resource when being less than the user demand of this travelling carriage, judge this sub-district in this dispatching cycle whether also scheduling be positioned at the travelling carriage of marginal position, if, insufficient section priority allocation subcarrier set F
E, toThe available carrier wave resource; If not, insufficient section priority allocation subcarrier set F
E, inThe available carrier wave resource.
3. the distribution method of sub-district carrier resource in the ofdm system as claimed in claim 1 or 2 is characterized in that, also comprises after the described step a):
Receive the travelling carriage schedule information of the current marginal position of described neighbor cell;
If the current not scheduling of described neighbor cell is positioned at the travelling carriage of marginal position, be preferably this travelling carriage allocation of subcarriers set F
E, inOutside the available carrier wave resource.
4. as the distribution method of sub-district carrier resource in the ofdm system as described in the claim 3, it is characterized in that, also comprise between described step b) and the step c): if described neighbor cell surpasses 1, when wherein there being the sub-district current when scheduling is positioned at the travelling carriage of marginal position, at subcarrier set F
E, toIn leave out this employed subcarrier in cell edge position.
5. the distribution method of sub-district carrier resource in the ofdm system as claimed in claim 1 or 2 is characterized in that described method also comprises:
Determine the position of travelling carriage in this sub-district;
To the travelling carriage of this cell edge position, from subcarrier set F
E, inIn be this travelling carriage distributing carrier wave resource.
6. as the distribution method of sub-district carrier resource in the ofdm system as described in the claim 5, it is characterized in that: the position of described travelling carriage in this sub-district by calculating this travelling carriage pilot frequency information intensity and arrival bearing or determine by the path loss information that this travelling carriage reports.
7. the distribution method of sub-district carrier resource in the ofdm system as claimed in claim 1 or 2 is characterized in that: described when travelling carriage is carried out figuration the neighbor cell of beam position determine according to the arrival bearing of this travelling carriage.
8. the base station in the ofdm system is characterized in that, comprises neighbor cell module, neighbor cell sub-carrier block, carrier resource distribution module, wherein:
The neighbor cell of beam position when the travelling carriage that the neighbor cell module is used for being defined as being positioned at this centre position, sub-district carries out wave beam forming;
The neighbor cell sub-carrier block is used for determining the employed subcarrier set of the marginal position F of the neighbor cell of described beam position
E, to
The carrier resource distribution module is used for according to F
E, toWith the employed subcarrier set in this cell edge position F
E, inBe this travelling carriage distributing carrier wave resource, distribution method comprises priority allocation F
E, toAnd F
E, inOutside the available carrier wave resource.
9. as the base station in the ofdm system as described in the claim 8, it is characterized in that: described base station also comprises neighbor cell Real-Time Scheduling module, is used for receiving the travelling carriage schedule information of the current marginal position of described neighbor cell;
The neighbor cell travelling carriage schedule information of neighbor cell sub-carrier block reception of neighboring cell Real-Time Scheduling module output will not dispatched the employed subcarrier of marginal position of sub-district of marginal position travelling carriage from F in the described neighbor cell
E, toMiddle deletion.
10. as the base station in the ofdm system as described in claim 8 or 9, it is characterized in that the distribution method of described carrier resource distribution module also comprises: work as F
E, inAnd F
E, toOutside available carrier wave resource when being less than the user demand of this travelling carriage, if the travelling carriage that is positioned at marginal position is not dispatched in this sub-district in this dispatching cycle, insufficient section priority allocation subcarrier set F
E, inThe available carrier wave resource; Otherwise work as F
E, toWhen being not empty set, insufficient section priority allocation subcarrier set F
E, toThe available carrier wave resource.
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| CN104735676A (en) * | 2013-12-19 | 2015-06-24 | 宇龙计算机通信科技(深圳)有限公司 | Wireless local area network communication method and wireless local area network communication device |
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