CN102118752A - Method and device for interference control and coordination - Google Patents
Method and device for interference control and coordination Download PDFInfo
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- CN102118752A CN102118752A CN2009102175160A CN200910217516A CN102118752A CN 102118752 A CN102118752 A CN 102118752A CN 2009102175160 A CN2009102175160 A CN 2009102175160A CN 200910217516 A CN200910217516 A CN 200910217516A CN 102118752 A CN102118752 A CN 102118752A
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Abstract
The invention discloses a method and a device for interference control and coordination, which solve the problem of stronger interference between resource blocks used in different areas during subsequent use of the resource blocks. The method comprises the following steps: determining a transmission channel included in an available spectrum as well as resource blocks included in the transmission channel after a spectrum change is detected, and then determining the interference value of the transmission channel in interference; as to any area in all areas where to-be-allocated resource blocks are positioned, selecting the resource blocks different from the resource blocks to be allocated in the area at present from the determined resource blocks; determining a first weight factor determination strategy corresponding to the area according to first weight factor determination strategies corresponding to different allocation states; allocating first weight factors for the selected resource blocks according to the determined strategy; and allocating the selected resource blocks to the area, and configuring use priorities for the allocated resource blocks according to the interference value of the transmission channel and the first weight factors for the allocated resource blocks.
Description
Technical field
The present invention relates to the Computers and Communication technical field, relate in particular to a kind of Interference Control and coordination approach and device.
Background technology
In order to effectively utilize the frequency spectrum resource of dynamic change, the CR technology was proposed first in 1999, the CR technology is meant the environment of the unauthorized user with cognitive function around can perception, the frequency spectrum resource that lasting detection has been authorized, and guarantee authorized user preferential use and situation that transmission performance is impaired hardly under the use current detection to frequency spectrum cavity-pocket (idle frequence) communicate.Over past ten years, the CR technology has been subjected to extensive concern, is considered to solve the nervous and low most promising technology of frequency spectrum resource utilization ratio of current wireless frequency spectrum resource.
And OFDM (OFDM, Orthogonal Frequency Division Multiplex) technology then is the high speed transmission technology at a kind of wireless communication system of the proposition sixties in 20th century, this technology is applied in multiple communication standard, as IEEE 802.16 series standards, 3GPP Long Term Evolution (Long-Term Evolution, LTE) standard etc., and it also is expected to become the key technology of main flow in next generation mobile communication system IMT-Advanced.Orthogonal frequency division multiplexing multiple access inserts the multiple access to communication system that (OFDMA) system is based on the OFDM technology, and in the OFDM/OFDMA system, resource management is a time-frequency two-dimensional with scheduling: in time, be that unit carries out dispatching management according to time slot or symbol generally; On frequency, be that unit handles often by a plurality of subcarriers, 1 time resource is handled unit * 1 frequency resource and is handled the minimum particle size that unit has just constituted a resource scheduling management, it is the time-frequency thread, 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.
At present, adopt in the communication system that comprises unauthorized user of CR technology, need divide the idling-resource piece and be equipped with the communication that realizes unauthorized user, and, also need adopt corresponding Interference Control and coordination technique at different Resource Block, when could conflict, reduce between the unauthorized user and disturb in the Resource Block generation of the Resource Block of avoiding unauthorized user to use and authorized user use.In the prior art, it no matter is distribution to the idling-resource piece, still carry out Interference Control and coordination at the different resource piece, all be based on and carry out under the condition that communication system has the fixing frequency spectrum resource that can be used by unauthorized user, and at the situation that can be changed by the frequency spectrum resource that unauthorized user uses in the communication system, this moment is if influencing each other between the Resource Block that frequency spectrum resource comprised do not consider variation in the process that Resource Block is distributed after, then might occur follow-uply when using Resource Block, between the Resource Block that is used in the zones of different more strongly disturbing problem can take place.
Summary of the invention
The embodiment of the invention provides a kind of Interference Control and coordination approach and device, in order to solve after the frequency spectrum resource that can be used by unauthorized user changes, influencing each other between the Resource Block that frequency spectrum resource comprised after in the process that Resource Block is distributed, not considering variation, then might occur follow-uply when using Resource Block, between the Resource Block that is used in the zones of different more strongly disturbing problem can take place.
The embodiment of the invention is by the following technical solutions:
A kind of Interference Control and coordination approach comprise:
After detecting the frequency spectrum that can be used and changing, determine the Resource Block that current transmission channel that can be comprised by the frequency spectrum that unauthorized user uses and described transmission channel comprise, and determine the described transmission channel interference value of suffered interference respectively by unauthorized user; And
Carry out at the arbitrary zone in each zone of Resource Block to be allocated:
From the Resource Block of determining, choose the Resource Block that is different from the current Resource Block that has distributed in this zone; And
According to the predetermined first weight factor definite strategy corresponding, determine that first weight factor of the resource block assignments state correspondence that this zone is current is determined strategy with different distribution state; And
Determine strategy according to first weight factor of determining, be described resource block assignments first weight factor of choosing;
Give this zone with the described resource block assignments chosen, and, be that priority is used in the described Resource Block configuration that distributes according to the interference value and described first weight factor of transmission channel under the described Resource Block that distributes.
Preferably, after giving this zone with the described resource block assignments chosen, also comprise: at the total resources of judging all Resource Block of distributing to this zone during, from the Resource Block of distributing to other zones and not taken by other zones, choose Resource Block and allocate to this zone less than this regional tentation data transmission quantity.
Preferably, said method can also comprise step: use priority for the described Resource Block configuration of allotment, wherein Pei Zhi use priority is lower than the corresponding respectively use priority of all Resource Block of distributing to this zone.
Preferably, interference value and described first weight factor according to transmission channel under the described Resource Block that distributes, for the described Resource Block configuration that distributes uses priority specifically to comprise: according to the interference value of transmission channel under the described Resource Block that distributes, second weight factor of definite described Resource Block that distributes; Carry out the product calculation of described second weight factor and described first weight factor, obtain the product calculation result; And the use priority of the described Resource Block that described product calculation result is defined as distributing.
Preferably, after the described Resource Block configuration use priority of distributing, also comprise: this zone is carried out divide subregion operation, wherein divide the subregion number that obtains described subregion identical and different and the distance between the specific base in this zone and have nothing in common with each other with the number of the current Resource Block that has been assigned with in this zone; Based on the current use priority order from high to low of having distributed to this regional Resource Block, with distribute to that this regional Resource Block is distributed to successively and described specific base between distance each described subregion from far near.
A kind of Interference Control and conditioning unit, comprise: determining unit, be used for after detecting the frequency spectrum that can be used and changing by unauthorized user, determine the Resource Block that current transmission channel that can be comprised by the frequency spectrum that unauthorized user uses and described transmission channel comprise, and determine the described transmission channel interference value of suffered interference respectively; Choose the unit, be used for arbitrary zone execution: from the Resource Block that determining unit is determined, choose the Resource Block that is different from the current Resource Block that has distributed in this zone at each zone of Resource Block to be allocated; The strategy determining unit is used for determining that according to the predetermined definite strategy of first weight factor corresponding with different distribution state first weight factor of the resource block assignments state correspondence that this zone is current is determined strategy; The first weight factor determining unit, first weight factor that is used for determining according to tactful determining unit is determined strategy, for choosing described resource block assignments first weight factor of unit selection; Allocation units are used for giving this zone with the described resource block assignments of choosing unit selection; Use the priority dispensing unit, described first weight factor that the interference value of transmission channel and the first weight factor determining unit are determined under the described Resource Block that the allocation units that are used for determining according to determining unit distribute is for priority is used in the described Resource Block configuration that allocation units distribute.
The embodiment of the invention provides a kind of Interference Control and coordinate scheme, this scheme can be after the frequency spectrum that can be used by unauthorized user changes, take all factors into consideration the suffered interference value that causes by frequency spectrum resource variation etc. of each transmission channel that current usable spectrum comprises and current resource block assignments state in each zone of Resource Block to be allocated, and determine the use priority of Resource Block according to above-mentioned interference value and resource block assignments state, because this scheme that the embodiment of the invention provides can be when determining the use priority of Resource Block, consider the phase mutual interference between the affiliated transmission channel of Resource Block, thereby can for Resource Block dispose one suitable, can embody the use priority of the affiliated suffered interference of transmission channel of Resource Block, therefore can solve after the frequency spectrum resource that can be used by unauthorized user changes, influencing each other between the Resource Block that frequency spectrum resource comprised after in the process that Resource Block is distributed, not considering variation, then might occur follow-uply when using Resource Block, between the Resource Block that is used in the zones of different more strongly disturbing problem can take place.
Description of drawings
A kind of Interference Control that Fig. 1 provides for the embodiment of the invention and the idiographic flow schematic diagram of coordination approach;
Fig. 2 is the concrete schematic diagram of the usable spectrum that can be used by unauthorized user supposed in the embodiment of the invention;
Fig. 3 is the concrete schematic diagram of the time-frequency multiplexer mode of an OFDMA system in the embodiment of the invention;
Fig. 4 distributes schematic diagram the first time in whole bunch for Resource Block in the embodiment of the invention;
Fig. 5 is for after having authorized user to take the frequency spectrum resource of transmission channel 2 in the embodiment of the invention, and Resource Block distributes schematic diagram the first time in whole bunch;
Fig. 6 distributes schematic diagram the second time in whole bunch for Resource Block in the embodiment of the invention;
Fig. 7 is for after having authorized user to take the frequency spectrum resource of transmission channel 2 in the embodiment of the invention, and Resource Block distributes schematic diagram the second time in whole bunch;
Fig. 8 is for the third time distribution schematic diagram of Resource Block in whole bunch in the embodiment of the invention;
Fig. 9 is after having authorized user to take the frequency spectrum resource of transmission channel 2 in the embodiment of the invention, for the third time distribution schematic diagram of Resource Block in whole bunch;
Figure 10 is base station B in the embodiment of the invention
iThe signal of the tentation data transmission quantity that the sector that is covered is current;
Figure 11 is sector S in the embodiment of the invention
I1Finish to sector S
I2Use the resource block assignments schematic diagram behind the idling-resource piece 6 temporarily;
Figure 12 is sector S in the embodiment of the invention
I1Finish to sector S
I3Use the resource block assignments schematic diagram behind the idling-resource piece 10 temporarily;
Figure 13 is sector S in the embodiment of the invention
I1The use sequence number is 1 Resource Block, sector S
I3Using sequence number is the concrete schematic diagram of 9 Resource Block;
Figure 14 is sector S in the embodiment of the invention
I2Finish to sector S
I1Use the resource block assignments schematic diagram behind the idling-resource piece 2 temporarily;
Figure 15 is sector S in the embodiment of the invention
I2Finish to sector S
I3Use the resource block assignments schematic diagram behind the idling-resource piece 10 temporarily;
The schematic diagram of the Resource Block coverage when Figure 16 all is assigned with a Resource Block for each sector in the embodiment of the invention;
Figure 17 all has been assigned with the schematic diagram of two Resource Block for each sector in the embodiment of the invention;
Figure 18 all has been assigned with the schematic diagram of three Resource Block for each sector in the embodiment of the invention;
Figure 19 all has been assigned with the schematic diagram of four Resource Block for each sector in the embodiment of the invention;
A kind of Interference Control that Figure 20 provides for the embodiment of the invention and the concrete structure schematic diagram of conditioning unit.
Embodiment
The embodiment of the invention is after the frequency spectrum that can be used by unauthorized user changes, take all factors into consideration the suffered interference value that causes by frequency spectrum resource variation etc. of each transmission channel that current usable spectrum comprises and current resource block assignments state in each zone of Resource Block to be allocated, and determine the use priority of Resource Block according to above-mentioned interference value and resource block assignments state, thereby solved after the frequency spectrum resource that can be used by unauthorized user changes, influencing each other between the Resource Block that frequency spectrum resource comprised after in the process that Resource Block is distributed, not considering variation, in the time of follow-up use Resource Block then might occurring, between the Resource Block that is used in the zones of different more strongly disturbing problem can take place.
Be explained in detail to the main realization principle of embodiment of the invention technical scheme, embodiment and to the beneficial effect that should be able to reach below in conjunction with each accompanying drawing.
The embodiment of the invention at first provides a kind of Interference Control and coordination approach, and the idiographic flow schematic diagram of this method may further comprise the steps as shown in Figure 1:
Step 15, at above-mentioned arbitrary zone, give this zone with the resource block assignments of choosing, and according to being first weight factor of this resource block assignments in the interference value of transmission channel under the Resource Block that distributes and the step 14, for priority is used in the Resource Block configuration that distributes, in embodiments of the present invention, can but be not limited to interference value according to transmission channel under this Resource Block that distributes, determine second weight factor of this Resource Block of distribution, then, carry out the product calculation of this second weight factor and first weight factor again, obtain the product calculation result, thereby the use priority of this Resource Block that this product calculation result is defined as distributing, perhaps, in embodiments of the present invention, can also but be not limited to carry out the sum operation of this second weight factor and first weight factor, thereby the use priority of this Resource Block that the operation result that sum operation obtains is defined as distributing, can also be in the embodiment of the invention according to actual conditions, adopt other to determine to use the mode of priority, do not repeat them here, need to prove, in embodiments of the present invention, the method of determining second weight factor of this Resource Block of distributing according to the interference value of transmission channel under this Resource Block can have multiple, such as, directly the inverse of interference value is set to second weight factor, also can distinguish the interference value of suffered interference according to the transmission channel that frequency spectrum comprises, at first second weight factor greater than the interference value correspondence of being scheduled to interference threshold is set to infinitesimal (or being set to invalid value NaN), then, again according to from large to small interference value correspondence by little mode to the second big weight factor, utilization is not more than the different interference values of predetermined interference threshold, determines and pairing second weight factor of different interference values that is not more than predetermined interference threshold.
This Interference Control and the coordination approach that provide according to the embodiment of the invention, with by earlier to after be that the situation of Resource Block correspondence first weight factor from large to small of region allocation is an example, if in the assigning process of Resource Block, variation has taken place in usable spectrum, make that the interference value with regard to the suffered interference of transmission channel under the Resource Block that has been assigned with increases before usable spectrum changes, and make the interference value of the suffered interference of transmission channel under the Resource Block that after usable spectrum changes, will distribute reduce (second weight factor that this Resource Block that will distribute promptly might occur is significantly smaller than the situation of second weight factor of the Resource Block that has distributed), the such scheme that provides according to the embodiment of the invention then, in the change use priority of the Resource Block that the use priority of this Resource Block that the back distributes just might distribute before usable spectrum changes greater than (being higher than) of usable spectrum, thereby it is follow-up when using the Resource Block that distributes, according to using priority, can preferentially use the Resource Block that after usable spectrum changes, distributes with higher use priority, because it is lower (that is: when using this Resource Block that this has under the Resource Block of higher use priority an interference value of the suffered interference of transmission channel, interference meeting between the different transmission channels is less), and the interference value of the suffered interference of transmission channel is higher (that is: when using this Resource Block under the above-mentioned Resource Block with low use priority that distributes before usable spectrum changes, interference meeting between the different transmission channels is bigger), hence one can see that, this scheme that adopts the embodiment of the invention to provide can dynamically be adjusted the use priority of Resource Block according to the current actual state of transmission channel, after solution can be changed by the frequency spectrum resource that unauthorized user uses effectively, influencing each other between the Resource Block that frequency spectrum resource comprised after in the process that Resource Block is distributed, not considering variation, then might occur follow-uply when using Resource Block, between the Resource Block that is used in the zones of different more strongly disturbing problem can take place.
In embodiments of the present invention, consider that the total resources that all Resource Block in a certain zone might occur might be not enough to satisfy the situation of this regional tentation data transmission quantity, therefore, after in above-mentioned steps 15, giving this zone with the resource block assignments chosen, can further include: at the total resources of judging all Resource Block of distributing to this zone during less than this regional tentation data transmission quantity, choosing Resource Block from the Resource Block of distributing to other zones and not taken by other zones allocates to this zone, it is used to be allocated as this zone by the Resource Block that other zones are not used, can alleviate the situation of this region resource piece deficiency to a certain extent, in embodiments of the present invention, can use priority for the Resource Block configuration of allotment, wherein Pei Zhi use priority is lower than the corresponding respectively use priority of all Resource Block of distributing to this zone, be the mode of a minimum use priority of this resource block assignments of allotment, can make use sequencing can not be subjected to the influence of this Resource Block of interim allotment according to the former Resource Block that uses priority that this zone is assigned with.
In addition, in embodiments of the present invention, after above-mentioned steps 15, can further include step: at first, this zone carried out divide subregion operation, wherein divide the subregion number that obtains subregion identical and different and the distance between the specific base in this zone and have nothing in common with each other with the number of the current Resource Block that has been assigned with in this zone; Then, based on the current use priority order from high to low of having distributed to this regional Resource Block, with distribute to that this regional Resource Block is distributed to successively and specific base between distance each sub regions from far near.。
Below this method of providing with the embodiment of the invention in practice be applied as example, describe the detailed applications flow process of this method that the embodiment of the invention provides in detail:
Before this detailed applications flow process is described, need earlier the applied environment of this detailed applications flow process to be done a hypothesis, in embodiments of the present invention, suppose the current usable spectrum that can be used by unauthorized user as shown in Figure 2, this usable spectrum comprises 3 transmission channel Channel 1, Channel 2 and Channel 3, second weight factor of corresponding each transmission channel is respectively α 1, α 2, α 3, wherein, α 1, α 2, α 3 is determined according to the interference value of the current suffered interference of each transmission channel respectively, such as, α 1+ α 2+ α 3=1 can be set, and α 1 is set, α 2, α 3 all with the interference value relation of being inversely proportional to of the suffered interference of corresponding transmission channel separately, further, above-mentioned each transmission channel respectively comprises 4 Resource Block, and then this usable spectrum comprises 12 Resource Block altogether, is respectively RB1, RB2, ..., RB12, wherein, the arrangement sequence number of arbitrary Resource Block in all Resource Block can be designated as m.And Fig. 3 is the time-frequency multiplexer mode figure of an OFDMA system in the embodiment of the invention, comprises 4 bunches altogether among this Fig. 3, is designated as A, B, C, D respectively, and equal 4 base stations are arranged in each bunch, is designated as B respectively
1, B
2, B
3, B
4, and the zone that each base station covered is divided into 3 sectors, each sector in whole bunch is designated as S respectively
I, 1, S
I, 2, S
I, 3, wherein, i be bunch in the sequence number of each base station, satisfy 1≤i≤4, if be illustrated in the sequence number of a sector in the base station range with j, then j satisfies 1≤j≤3, based on above-mentioned hypothesis, the detailed applications flow process of this method that inventive embodiments provides is as follows:
Distribute for the first time: when bunch in the current resource block assignments state in each sector be current when also not being assigned with Resource Block, need to bunch in each sector, base station carry out the distribution of the 1st Resource Block:
Determine strategy according to current first weight factor that is not assigned with the state correspondence of Resource Block in each sector in predetermined bunch, can be the identical weight factor β of each resource block assignments 1 this moment, therefore, according to α 1, α 2, α 3 and β 1, can calculate respectively 12 Resource Block RB1, RB2 ..., the use priority γ of RB12
11, γ
12 ..., γ
1M..., γ
112, wherein, n is used for characterizing Resource Block and is distributing to the pairing assignment order of all Resource Block of arbitrary sector when distributing to the sector, particularly, the allocation result of the Resource Block that above-mentioned usable spectrum resource is comprised is as shown in table 1 below, and Resource Block RB1, RB2 ..., the use priority of RB12 can be confirmed as α 1 * β 1, α 1 * β 1, α 1 * β 1, α 2 * β 1, α 2 * β 1, α 2 * β 1, α 3 * β 1, α 3 * β 1, α 3 * β 1 successively:
Table 1:
As can be seen from Table 1, each sector in bunch all has been assigned with 1 Resource Block, and does not duplicate the situation of distributes resource blocks, at this moment, Resource Block in whole bunch the distribution schematic diagram as shown in Figure 4, need to prove, in Fig. 4, S
3,1: 3 in order to expression sector S
3,1The Resource Block that is assigned with is that sequence number is 3 Resource Block, i.e. RB3.
If before carrying out above-mentioned distribution, there is authorized user to take the frequency spectrum resource of transmission channel 2, the interference value that determine these transmission channel 2 suffered interference this moment has surpassed predetermined interference threshold, then the second weight factor α 2 of these transmission channel 2 correspondences can be set to NaN, thereby the Resource Block RB5 that shows transmission channel 2 correspondences, RB6, RB7, RB8 can't use, therefore the Resource Block RB5 that comprised of transmission channel 2, RB6, RB7, RB8 is pairing to use priority also to be NaN (Resource Block that uses priority promptly can not use as the Resource Block of NaN), this moment, the allocation result of the Resource Block that the usable spectrum resource comprises was as shown in table 2 below, and the distribution schematic diagram of Resource Block this moment in whole bunch as shown in Figure 5, the implication of each symbol representative and Fig. 4 are similar among Fig. 5, do not repeat them here.
Table 2:
Distribute for the second time: if the current Resource Block of having distributed to each sector is as shown in table 1, and this moment need to bunch in each sector of comprising carry out the distribution of second Resource Block, then this is to carry out second resource block assignments at the current state that has been assigned with a Resource Block in sector, therefore need be the identical weight factor β 2 of each resource block assignments less than β 1, at this moment, suppose corresponding 3 transmission channel Channel 1, second weight factor of Channel2 and Channel 3 still is α 1, α 2, α 3, then RB1, RB2, ..., the use priority γ of RB12 in this sub-distribution
21, γ
22 ..., γ
2M..., γ
212 can be confirmed as α 1 * β 2, α 1 * β 2, α 1 * β 2, α 2 * β 2, α 2 * β 2, α 2 * β 2, α 3 * β 2, α 3 * β 2, α 3 * β 2 successively, and the Resource Block selection rule that adopts in this assigning process is:
When vacant as shown in Figure 1 the frequency spectrum resource of authorized user, the multiplexer mode of Resource Block is as shown in table 3, with symbol "/" the different resource piece of distributing to same sector is separated in the table, at same sector, be positioned at the use priority that use priority that "/" preceding Resource Block has has greater than the Resource Block that is positioned at after "/", the distribution schematic diagram of Resource Block this moment in whole bunch separated the different resource piece of distributing to same sector with symbol "/" in Fig. 6 as shown in Figure 6 equally.
Table 3:
Be similar to and distribute the above-mentioned first time Resource Block, when authorized user has taken the frequency spectrum resource of transmission channel 2, the interference value that determine these transmission channel 2 suffered interference this moment has surpassed predetermined interference threshold, then the second weight factor α 2 of these transmission channel 2 correspondences can be set to NaN, thereby the Resource Block RB5 that shows transmission channel 2 correspondences, RB6, RB7, RB8 can't use, therefore the Resource Block RB5 that comprised of transmission channel 2, RB6, RB7, the pairing priority of using of RB8 also is NaN, this moment, the allocation result of the Resource Block that the usable spectrum resource comprises was as shown in table 4 below, compare the S in the table 4 with table 3
4,1Sector and S
1,3The sector correspondence according to using priority that variation has been taken place in the ordering that Resource Block carries out, such as, in table 3, distribute to S
4,1The use priority of the Resource Block RB4 of sector is the use priority that is higher than Resource Block RB1, and in table 4, distributes to S
4,1The use priority of the Resource Block RB 4 of sector then is lower than the use priority of Resource Block RB1.This moment the distribution schematic diagram of Resource Block in whole bunch as shown in Figure 7, the implication of each symbol representative and Fig. 6 are similar among Fig. 7, do not repeat them here.
Table 4:
Distribute for the third time: if the current Resource Block of having distributed to each sector is as shown in table 3, and this moment need to bunch in each sector of comprising carry out the 3rd, the distribution of four Resource Block, then this is to carry out the 3rd at the current state that has been assigned with a Resource Block in sector, four resource block assignments, therefore need be the identical weight factor β 3 of each resource block assignments less than β 2, and further be the identical weight factor β 4 of each resource block assignments less than β 3, at this moment, suppose corresponding 3 transmission channel Channel 1, second weight factor of Channel 2 and Channel1 still is α 1, α 2, α 3, and the Resource Block selection rule that adopts in this assigning process is:
This time the allocation result of Resource Block is as shown in table 5 below, after assigning, there are 4 available Resource Block every sector, the distribution schematic diagram of Resource Block this moment in whole bunch as shown in Figure 8, with symbol "/" the different resource piece of distributing to same sector is separated, wherein, at same sector, the use priority that comes "/" preceding Resource Block be equally be higher than (greater than) come the use priority of Resource Block after "/".
Table 5:
As can be seen from Table 5, when the entire spectrum resource all can be used by unauthorized user, 4 Resource Block that the sector with same sequence number that each base station covered (being the sector with same sequence number with the 1st sector in the 2nd sub-district as the 1st sector in the 1st sub-district) is assigned with are identical, but the use priority of the same resource block of distributing for the sector with same sequence number that different base station covered has nothing in common with each other, such as, the Resource Block RB1 that distributes to the 1st sector in the 1st sub-district has the highest use priority in distributing to 4 Resource Block of this sector, but the Resource Block RB1 that distributes to the 1st sector in the 4th sub-district is to have minimum use priority in distributing to 4 Resource Block of this sector, the reason of doing like this is if each Resource Block in the same sector does not use order, completely random is used, it is overlapping that serious Resource Block then can take place, sector such as the same sequence number that covers as if different base station is used Resource Block RB1 simultaneously, then can cause using the interference between the user of this Resource Block to become bigger, and make in the embodiment of the invention that the same Resource Block of distributing to different sectors has different use priority, thereby can make follow-up when the Resource Block that uses arbitrary sector to be assigned with, can according to from high to low use priority correspondence by earlier to after the use order of Resource Block, the Resource Block that uses this sector to be assigned with successively, promptly at same Resource Block, maximum with this Resource Block uses the sector of priority just to have the highest priority that uses this Resource Block, the situation of the resource that same Resource Block provides can not appear between the different sectors fighting for evenly matchedly, thereby cause the bigger situation of interference between the transmission channel in the time of can avoiding occurring using same Resource Block, further, owing to this scheme that provides by the embodiment of the invention, in the assigning process of Resource Block, can be dynamically dynamically adjust the height order of the use priority of the Resource Block that each sector is assigned with, thereby can make that follow-up interference between each transmission channel when using priority to call Resource Block is less according to the variation of frequency spectrum.
Similarly, when the authorized user system has taken the frequency spectrum resource of transmission channel 2, the interference value that determine these transmission channel 2 suffered interference this moment has surpassed predetermined interference threshold, then the second weight factor α 2 of these transmission channel 2 correspondences can be set to NaN, thereby the Resource Block RB5 that shows transmission channel 2 correspondences, RB6, RB7, RB8 can't use, therefore the Resource Block RB5 that comprised of transmission channel 2, RB6, RB7, the pairing priority of using of RB8 also is NaN, this moment, the allocation result of the Resource Block that the usable spectrum resource comprises was as shown in table 6 below, as shown in Table 6, because authorized user takies transmission channel 2, thereby compare with table 5, first sector in the table 6 and the 3rd sector correspondence according to using priority that variation has been taken place in the ordering that Resource Block carries out.The distribution schematic diagram of Resource Block this moment in whole bunch as shown in Figure 9.
Table 6:
Follow-up when the Resource Block that need to use each sector to be assigned with, can be according to the tentation data transmission quantity size needs of each sector, according to Resource Block had by the use priority correspondence of big (height) to little (low) by earlier to after choose order, choose Resource Block successively in order to satisfy the demand of tentation data transmission quantity.
In the above-described embodiment, be based on the entire spectrum resource and comprise 3 channels, each channel comprises 4 Resource Block, and number of base stations is 4 in the unauthorized user system bunch, number of sectors is 3 resource block assignments scheme, this scheme can be applied to whole usable spectrum resource and comprise an X channel, comprise M Resource Block altogether, the base station number is N in any bunch, sector number is the resource block assignments in the OFDMA system of S, what need explanation a bit is, to bunch in carry out Resource Block between each sector, base station distribution need repeatedly repeat, till the resource block number that distributes in each sector is N, and newly assigned Resource Block is to determine like this in the sector:
When the Resource Block that has distributed in each sector that each base station covered is 0, for distributing a mutually different Resource Block respectively in each sector that each base station covered; When the Resource Block that has distributed in each sector that each base station covered during less than N, distribute as follows: (arbitrary sector of 1≤i≤N) covered is (1≤h≤N from the h base station in the i base station, h ≠ i i base station) covered, have in the current Resource Block that has been assigned with in sector of same sequence number with this sector, choose a Resource Block that is different from any Resource Block that this sector that the i base station covered has been assigned with, and this resource block assignments that will choose this sector of being covered for the i base station, and first weight factor of this Resource Block of choosing is less than first weight factor of those Resource Block of distributing to this sector.
Explanation a bit again, the base station number is that N, sector number are in the OFDMA system of S in any bunch if this scheme that the embodiment of the invention is provided is applied in, and Resource Block adds up to M, be designated as SC1, SC2 ..., SCM, if M Resource Block is divided into the S group, then the number of resource blocks P of each sector domestic demand distribution is P=[M/S], wherein, [M/S] is not more than the maximum integer of M/S in order to expression, according to 1,2 ..., S carries out the Resource Block sequence number, Resource Block q={SC (q-1} * p+1, SC (q-1} * P+2 ..., SCq * p}, (1≤q≤S).Thus, also have M-P * S Resource Block not to be assigned in the Resource Block group, these Resource Block can be used for high tentation data transmission quantity base station dilatation, indoor covering or other purposes.
In embodiments of the present invention, can also realize temporarily using of Resource Block between each sector, particularly, can carry out Resource Block at following two kinds of situations and use scheme:
First kind of situation: the Resource Block between each sector that same base station covered is used temporarily.At this first kind of situation, suppose base station B
iThe signal of the tentation data transmission quantity that the sector that is covered is current as shown in figure 10, as sector S
I1Tentation data transmission quantity when big, sector S
I1Use 2 Resource Block, the Resource Block sequence number is: 1 and 2, this moment sector S
I2With sector S
I3The tentation data transmission quantity less, only use 1 Resource Block, wherein sector S
I2The use sequence number is 5 Resource Block, and sector S
I3Then using sequence number is 9 Resource Block.As sector S
I1The tentation data transmission quantity increase gradually, not obvious when need increasing the 3rd Resource Block if other two sector tentation data transmission quantities change, then may be thought of as sector S
I1Distribute the 3rd Resource Block, but in view of sector S
I2With sector S
I3The Resource Block 6 and 10 that is assigned with respectively all is not used, and because the use priority of the Resource Block 6 that distributed and 10 is greater than the use priority of the 3rd Resource Block that will distribute, therefore, this moment sector S
I1Can be to sector S
I2Use idling-resource piece 6 temporarily, or to sector S
I3Use idling-resource piece 10, sector S temporarily
I1Finish to sector S
I2Use temporarily behind the idling-resource piece 6 the resource block assignments schematic diagram as shown in figure 11.Further, as sector S
I1The tentation data transmission quantity continue to increase, make to be sector S
I1When the total resources of the Resource Block that distributes is not enough to satisfy this tentation data transmission quantity, not obvious if the tentation data transmission quantity of other two sectors still changes, then this moment sector S
I1Can be to sector S
I3Use idling-resource piece 10, sector S temporarily
I1Finish to sector S
I3Use temporarily behind the idling-resource piece 10 the resource block assignments schematic diagram as shown in figure 12.
Second kind of situation: Resource Block is used to other sectors in the sector of occupied Resource Block temporarily.At this second kind of situation, suppose that current channel 2 (Channel 2) as shown in Figure 2 is authorized to CU, be that 4 Resource Block that channel 2 is comprised can not be used, and, suppose to know the second weight factor α 3 of the second weight factor α 1 of channel 1 by the CR technology this moment greater than channel 3, and sector S
I1And S
I3The tentation data transmission quantity less, currency has used 1 Resource Block, wherein sector S
I1The use sequence number is 1 Resource Block, sector S
I3The use sequence number is 9 Resource Block, and the Resource Block operating position schematic diagram of this moment as shown in figure 13.In order to recover sector S
I2Communication function, sector S
I2Can use sector S
I1The current sequence number that has been assigned with is 2,3,4 Resource Block, because Resource Block 2,3,4 is in same channel and has the second identical weight factor, use the little interference that Resource Block produced of β value so use this moment the big interference that Resource Block produced of the second weight factor β value to be less than, therefore, this moment sector S
I2Can use sector S temporarily
I1Idling-resource piece 2, sector S
I2Finish to sector S
I1Use temporarily behind the idling-resource piece 2 the resource block assignments schematic diagram as shown in figure 14.As sector S
I2The tentation data transmission quantity continue to increase, and channel 2 is when still occupied, if other two sector S
I1, S
I3Tentation data transmission quantity when not having significant change, need relatively sector S
I1Resource Block 3 that is assigned with and sector S
I3The size of the use priority of the Resource Block 10 that is assigned with is supposed by relatively knowing S
I1The use priority of the Resource Block 3 that is assigned with is less than S
I3The use priority of the Resource Block 10 that is assigned with, then this moment sector S
I2Can be to sector S
I3Use idling-resource piece 10, sector S temporarily
I2Finish to sector S
I3Use temporarily behind the idling-resource piece 10 the resource block assignments schematic diagram as shown in figure 15.
According to foregoing description as can be known, this scheme that the embodiment of the invention provides is based on the mode of using priority, CR technology and time-frequency combination planing method are combined, realized reusing degree dynamic change of Resource Block with the variation of capacity of communication system, therefore this scheme of providing of the embodiment of the invention has adapted to the dynamic change of capacity of communication system, the scheme of temporarily using of while Resource Block can realize that also some available resources in the communication system also can continue to keep communication when occupied, strengthened the even adaptive capacity of capacity skewness between the different sectors that the base station is covered, also strengthened the adaptive capacity of the professional acute variation in reply sector simultaneously the communication service of keeping the occupied sector of channel resource.
In addition, this scheme that the embodiment of the invention provides can also further be improved, and is with the dynamic assignment of realization to the Resource Block coverage, specific as follows:
At arbitrary sector, according to number of resource blocks n that is using in this sector and the position that covers the base station of this sector, this sector can be divided into this sector reality at n identical strip region of the Resource Block quantity of usefulness, and with the base station is the center, by use priority correspondence overlay area from outside to inside from high to low, corresponding with the using priority successively transmission subchannel that Resource Block comprised covers a said n strip region, promptly utilize the outer collar region of the transmission subchannel coverage sector that Resource Block comprised with bigger use priority, utilize the transmission subchannel coverage sector inner circle area that Resource Block comprised of less use priority, because it is little to have the multiplex distance of the transmission subchannel that less use priority Resource Block comprised, therefore adopt the above-mentioned method of salary distribution can reduce interference, promote covering quality.Change at above-mentioned tentation data transmission quantity, and according to the situation that changes the number (such as use Resource Block temporarily) of adjusting the employed Resource Block in sector from other sectors, can behind the number of having adjusted Resource Block, correspondingly adjust the overlay area of using Resource Block again.
Below same hypothesis N=4, S=3, and be how the coverage that example further specifies Resource Block is dynamically adjusted with base station 1:
As shown in figure 16, the Resource Block coverage schematic diagram when all being assigned with a Resource Block for each sector, the coverage of a Resource Block of this distribution this moment is whole sector;
As shown in figure 17, for each sector all has been assigned with two Resource Block, and the Resource Block coverage sector schematic diagram when each sector also is divided into inside and outside two parts zone.Wherein, Resource Block 1,5,9 transmission subchannel that comprised with bigger use priority cover the perimeter of corresponding sector, and Resource Block 2,6,10 transmission subchannel that comprised with less use priority then cover the interior zone of corresponding sector;
As shown in figure 18, for each sector all has been assigned with three Resource Block, and with each sector be divided into interior, in, the schematic diagram of Resource Block coverage sector during outer three subregions.Wherein, Resource Block 1,5,9 transmission subchannel that comprised with bigger use priority cover the perimeter of corresponding sector, have the central region that time Resource Block 2,6,10 transmission subchannel that comprised of big use priority cover corresponding sector, Resource Block 3,7,11 transmission subchannel that comprised with minimum use priority cover the interior zone of corresponding sector;
As shown in figure 19, for each sector all has been assigned with four Resource Block, and each sector is divided into four zones by the distance of position, distance base station, correspondingly adopts the transmission subchannel that Resource Block comprised of use priority these four schematic diagrames that the zone covers with different sizes.
It may be noted that a bit: embodiments of the invention are to be that example describes with the OFDMA system, but method of the present invention is equally applicable to other ofdm system.
For what the present invention also needed to illustrate a bit be: the OFDMA frame is divided into uplink frame, downlink frame, the frame of each direction can be divided into service bearer part, administrative section, control part and grade and have the different parts that cover with capacity characteristic, in embodiments of the present invention, at different parts in the OFDMA system-frame of frequency spectrum resource dynamic change, can in same frame, manage scheduling to the pairing Resource Block of different parts respectively according to this method provided by the invention.
Correspondingly, the embodiment of the invention also provides a kind of Interference Control and conditioning unit, and the concrete structure schematic diagram of this device comprises as shown in figure 20:
Determining unit 201, be used for after detecting the frequency spectrum that can be used and changing by unauthorized user, determine the Resource Block that current transmission channel that can be comprised by the frequency spectrum that unauthorized user uses and transmission channel comprise, and the interference value of the suffered interference of definite transmission channel difference;
Choose unit 202, be used for arbitrary zone execution: from the Resource Block that determining unit 201 is determined, choose the Resource Block that is different from the current Resource Block that has distributed in this zone at each zone of Resource Block to be allocated;
The first weight factor determining unit 204 is used for determining strategy according to first weight factor that tactful determining unit 203 is determined, for choosing resource block assignments first weight factor of choosing unit 202;
Use priority dispensing unit 206, first weight factor that the interference value of transmission channel and the first weight factor determining unit 204 are determined under the Resource Block that the allocation units 205 that are used for determining according to determining unit 201 distribute is for priority is used in the Resource Block configuration that allocation units 205 distribute.
Preferably, the said apparatus that the embodiment of the invention provides can also comprise: the Resource Block deployment unit, be used for after allocation units 205 are given this zone with the resource block assignments of choosing, at the total resources of judging all Resource Block of distributing to this zone during, from the Resource Block of distributing to other zones and not taken by other zones, choose Resource Block and allocate to this zone less than this regional tentation data transmission quantity.
Preferably, the said apparatus that the embodiment of the invention provides can further include: use priority determining unit, be used to the Resource Block configuration of Resource Block deployment unit allotment to use priority, wherein Pei Zhi use priority is lower than the corresponding respectively use priority of all Resource Block of distributing to this zone.
Preferably, corresponding a kind of implementation of using priority dispensing unit 206 functions can be divided into following functional module with priority dispensing unit 206 in the embodiment of the invention:
The second weight factor determination module is used for the interference value according to transmission channel under the Resource Block that distributes, and determines second weight factor of the Resource Block of distribution; The product calculation Executive Module is used to carry out the second definite weight factor of the second weight factor determination module and the product calculation of first weight factor, obtains the product calculation result; Use the priority determination module, the use priority of the Resource Block that the product calculation result who is used for that the product calculation Executive Module is obtained is defined as distributing.
Preferably, this device that the embodiment of the invention provides can further include: division unit, be used for this zone carried out and divide the subregion operation, wherein divide the subregion number that obtains subregion identical and different and the distance between the specific base in this zone and have nothing in common with each other with the number of the current Resource Block that has been assigned with in this zone; The resource block assignments unit, be used for the use priority order from high to low of having distributed to this regional Resource Block based on current, with distribute to this regional Resource Block distribute to successively division unit divide obtain and specific base between distance each sub regions from far near.
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. Interference Control and coordination approach is characterized in that, comprising:
After detecting the frequency spectrum that can be used and changing, determine the Resource Block that current transmission channel that can be comprised by the frequency spectrum that unauthorized user uses and described transmission channel comprise, and determine the described transmission channel interference value of suffered interference respectively by unauthorized user; And
Carry out at the arbitrary zone in each zone of Resource Block to be allocated:
From the Resource Block of determining, choose the Resource Block that is different from the current Resource Block that has distributed in this zone; And
According to the predetermined first weight factor definite strategy corresponding, determine that first weight factor of the resource block assignments state correspondence that this zone is current is determined strategy with different distribution state; And
Determine strategy according to first weight factor of determining, be described resource block assignments first weight factor of choosing;
Give this zone with the described resource block assignments chosen, and, be that priority is used in the described Resource Block configuration that distributes according to the interference value and described first weight factor of transmission channel under the described Resource Block that distributes.
2. the method for claim 1 is characterized in that, give this zone with the described resource block assignments chosen after, also comprise:
At the total resources of judging all Resource Block of distributing to this zone during, from the Resource Block of distributing to other zones and not taken by other zones, choose Resource Block and allocate to this zone less than this regional tentation data transmission quantity.
3. method as claimed in claim 2 is characterized in that, also comprises:
Use priority for the described Resource Block configuration of allotment, wherein Pei Zhi use priority is lower than the corresponding respectively use priority of all Resource Block of distributing to this zone.
4. the method for claim 1 is characterized in that, according to the interference value and described first weight factor of transmission channel under the described Resource Block that distributes, for the described Resource Block configuration that distributes uses priority specifically to comprise:
According to the interference value of transmission channel under the described Resource Block that distributes, determine second weight factor of the described Resource Block of distribution;
Carry out the product calculation of described second weight factor and described first weight factor, obtain the product calculation result; And
The use priority of the described Resource Block that described product calculation result is defined as distributing.
5. as the arbitrary described method of claim 1～4, it is characterized in that, after the described Resource Block configuration use priority of distributing, also comprise:
This zone carried out divide subregion operation, wherein divide the subregion number that obtains described subregion identical and different and the distance between the specific base in this zone and have nothing in common with each other with the number of the current Resource Block that has been assigned with in this zone;
Based on the current use priority order from high to low of having distributed to this regional Resource Block, with distribute to that this regional Resource Block is distributed to successively and described specific base between distance each described subregion from far near.
6. Interference Control and conditioning unit is characterized in that, comprising:
Determining unit, be used for after detecting the frequency spectrum that can be used and changing by unauthorized user, determine the Resource Block that current transmission channel that can be comprised by the frequency spectrum that unauthorized user uses and described transmission channel comprise, and determine the described transmission channel interference value of suffered interference respectively;
Choose the unit, be used for arbitrary zone execution: from the Resource Block that determining unit is determined, choose the Resource Block that is different from the current Resource Block that has distributed in this zone at each zone of Resource Block to be allocated;
The strategy determining unit is used for determining that according to the predetermined definite strategy of first weight factor corresponding with different distribution state first weight factor of the resource block assignments state correspondence that this zone is current is determined strategy;
The first weight factor determining unit, first weight factor that is used for determining according to tactful determining unit is determined strategy, for choosing described resource block assignments first weight factor of unit selection;
Allocation units are used for giving this zone with the described resource block assignments of choosing unit selection;
Use the priority dispensing unit, described first weight factor that the interference value of transmission channel and the first weight factor determining unit are determined under the described Resource Block that the allocation units that are used for determining according to determining unit distribute is for priority is used in the described Resource Block configuration that allocation units distribute.
7. device as claimed in claim 6 is characterized in that, also comprises:
The Resource Block deployment unit, be used for after the described resource block assignments that allocation units will be chosen is given this zone, at the total resources of judging all Resource Block of distributing to this zone during, from the Resource Block of distributing to other zones and not taken by other zones, choose Resource Block and allocate to this zone less than this regional tentation data transmission quantity.
8. device as claimed in claim 7 is characterized in that, also comprises:
Dispensing unit is used to the Resource Block deployment unit to allocate to the described Resource Block configuration in this zone and uses priority, and wherein Pei Zhi use priority is lower than the corresponding respectively use priority of all Resource Block of distributing to this zone.
9. device as claimed in claim 6 is characterized in that, described use priority dispensing unit specifically comprises:
The second weight factor determination module is used for the interference value according to transmission channel under the described Resource Block that distributes, and determines second weight factor of the described Resource Block of distribution;
The product calculation Executive Module is used to carry out definite described second weight factor of the second weight factor determination module and the product calculation of described first weight factor, obtains the product calculation result;
Use the priority determination module, be used for the use priority of described Resource Block that the described product calculation result that the product calculation Executive Module obtains is defined as distributing.
10. as the arbitrary described device of claim 6～9, it is characterized in that, also comprise:
Division unit, be used for this zone carried out and divide the subregion operation, wherein divide the subregion number that obtains described subregion identical and different and the distance between the specific base in this zone and have nothing in common with each other with the number of the current Resource Block that has been assigned with in this zone;
The resource block assignments unit, be used for the use priority order from high to low of having distributed to this regional Resource Block based on current, with distribute to this regional Resource Block distribute to successively division unit divide obtain, and described specific base between distance from far near each described subregion.
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| CN 200910217516 CN102118752B (en) | 2009-12-31 | 2009-12-31 | Method and device for interference control and coordination |
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| CN104754587A (en) * | 2013-12-31 | 2015-07-01 | 中兴通讯股份有限公司 | Interference coordinating method and device for LTE (Long Term Evolution) system |
| CN105981425A (en) * | 2014-02-05 | 2016-09-28 | 高通股份有限公司 | Methods For Inter-Operator Coexistence On Shared Spectrum Or Unlicensed Bands |
| CN106304090A (en) * | 2015-05-13 | 2017-01-04 | 索尼公司 | The method and apparatus suppressing interference in dynamic spectrum access system |
| EP3846523A4 (en) * | 2018-08-28 | 2021-10-20 | Sony Group Corporation | Communication control device, communication control method and communication device |
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| EP1855434A1 (en) * | 2006-05-12 | 2007-11-14 | Alcatel Lucent | Resource allocation for OFDM transmission with subcarriers partitioning and bilateral cell subcarriers exchange |
| CN101437292A (en) * | 2008-12-23 | 2009-05-20 | 中国移动通信集团设计院有限公司 | Method and apparatus for scheduling time frequency resource of OFDM system |
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| EP1855434A1 (en) * | 2006-05-12 | 2007-11-14 | Alcatel Lucent | Resource allocation for OFDM transmission with subcarriers partitioning and bilateral cell subcarriers exchange |
| CN101437292A (en) * | 2008-12-23 | 2009-05-20 | 中国移动通信集团设计院有限公司 | Method and apparatus for scheduling time frequency resource of OFDM system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104754587A (en) * | 2013-12-31 | 2015-07-01 | 中兴通讯股份有限公司 | Interference coordinating method and device for LTE (Long Term Evolution) system |
| CN105981425A (en) * | 2014-02-05 | 2016-09-28 | 高通股份有限公司 | Methods For Inter-Operator Coexistence On Shared Spectrum Or Unlicensed Bands |
| CN106304090A (en) * | 2015-05-13 | 2017-01-04 | 索尼公司 | The method and apparatus suppressing interference in dynamic spectrum access system |
| CN106304090B (en) * | 2015-05-13 | 2021-11-23 | 索尼公司 | Method and device for suppressing interference in dynamic spectrum access system |
| EP3846523A4 (en) * | 2018-08-28 | 2021-10-20 | Sony Group Corporation | Communication control device, communication control method and communication device |
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| CN102118752B (en) | 2013-04-03 |
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