CN102118752B - Method and device for interference control and coordination - Google Patents
Method and device for interference control and coordination Download PDFInfo
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- CN102118752B CN102118752B CN 200910217516 CN200910217516A CN102118752B CN 102118752 B CN102118752 B CN 102118752B CN 200910217516 CN200910217516 CN 200910217516 CN 200910217516 A CN200910217516 A CN 200910217516A CN 102118752 B CN102118752 B CN 102118752B
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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 method 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 refers to have the unauthorized user of the cognitive function environment around can perception, the frequency spectrum resource that lasting detection has been authorized, and guarantee authorized user preferential use and transmission performance hardly in the impaired situation use current detection to frequency spectrum cavity-pocket (idle frequence) communicate.Over past ten years, the CR technology has been subject 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, such 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 multiple access (OFDMA) system is based on the multiple access to communication system of OFDM technology, in the OFDM/OFDMA system, resource management and scheduling is time-frequency two-dimensional: in time, be that unit carries out dispatching management according to time slot or symbol generally; On frequency, be that unit processes by a plurality of subcarriers often, 1 time resource is processed unit * 1 frequency resource and is processed the minimum particle size that unit has just consisted of 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 to divide the idling-resource piece and be equipped with the communication that realizes unauthorized user, and, also need to adopt corresponding interference Control and coordination technology for different Resource Block, when could conflict in the Resource Block generation of the Resource Block of avoiding unauthorized user to use and authorized user use, reduce between the unauthorized user and disturb.In the prior art, it no matter is the distribution to the idling-resource piece, or disturb Control and coordination for 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 for the situation that can be changed by the frequency spectrum resource that unauthorized user uses in the communication system, if influencing each other between the Resource Block that the frequency spectrum resource do not consider variation this moment in the process that Resource Block is distributed after comprises, 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 occur.
Summary of the invention
The embodiment of the invention provides a kind of interference Control and coordination method 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 the frequency spectrum resource do not consider variation in the process that Resource Block is distributed after comprises, 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 occur.
The embodiment of the invention is by the following technical solutions:
A kind of interference Control and coordination method comprises:
After detecting the frequency spectrum that can be used by unauthorized user and changing, determine the Resource Block that the current transmission channel that can be comprised by the frequency spectrum that unauthorized user uses and described transmission channel comprise, and determine the interference value that described transmission channel is disturbed respectively; And
Carry out for the arbitrary zone in the regional 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 from different distribution state, determine the definite strategy of the first weight factor corresponding to the current resource block assignments state in this zone; And
Determine strategy according to the first weight factor of determining, be described resource block assignments the first weight factor of choosing;
Give this zone with the described resource block assignments chosen, and according to interference value and described first weight factor of transmission channel under the described Resource Block that distributes, be that priority is used in the described Resource Block configuration 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 less than this regional tentation data transmission quantity, from the Resource Block of distributing to other zones and not taken by other zones, choose Resource Block and allocate to this zone.
Preferably, said method can also comprise step: for priority is used in the described Resource Block configuration of allotment, wherein the use priority of configuration is lower than use priority corresponding to all Resource Block difference of distributing to this zone.
Preferably, interference value and described the 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, the second weight factor of definite described Resource Block that distributes; Carry out the product calculation of described the second weight factor and described the 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, it is different wherein to divide the subregion number that obtains described subregion and the distance specific base in this zone between identical and different from 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 coordination device, comprise: determining unit, be used for after detecting the frequency spectrum that can be used by unauthorized user and changing, determine the Resource Block that the current transmission channel that can be comprised by the frequency spectrum that unauthorized user uses and described transmission channel comprise, and determine the interference value that described transmission channel is disturbed respectively; Choose the unit, be used for the arbitrary zone execution for the regional of Resource Block to be allocated: 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; The strategy determining unit for according to the predetermined first weight factor definite strategy corresponding from different distribution state, is determined the definite strategy of the first weight factor corresponding to the current resource block assignments state in this zone; The first weight factor determining unit, the 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 choosing the described resource block assignments of unit selection to this zone; Use the priority dispensing unit, described the 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 coordination scheme, this scheme can be after the frequency spectrum that can be used by unauthorized user changes, consider the suffered interference value that is caused by frequency spectrum resource variation etc. of each transmission channel that current usable spectrum comprises and the current resource block assignments state of regional 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 that the affiliated transmission channel of Resource Block is disturbed, therefore can solve after the frequency spectrum resource that can be used by unauthorized user changes, influencing each other between the Resource Block that the frequency spectrum resource do not consider variation in the process that Resource Block is distributed after comprises, 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 occur.
Description of drawings
A kind of idiographic flow schematic diagram that disturbs the Control and coordination method that Fig. 1 provides for the embodiment of the invention;
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 is that Resource Block distributes schematic diagram the first time in whole bunch in the embodiment of the invention;
Fig. 5 is 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 is that Resource Block distributes schematic diagram the second time in whole bunch in the embodiment of the invention;
Fig. 7 is 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 covers 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;
Figure 16 is the schematic diagram of the Resource Block coverage when each sector all is assigned with a Resource Block in the embodiment of the invention;
Figure 17 is the schematic diagram that each sector all has been assigned with two Resource Block in the embodiment of the invention;
Figure 18 is the schematic diagram that each sector all has been assigned with three Resource Block in the embodiment of the invention;
Figure 19 is the schematic diagram that each sector all has been assigned with four Resource Block in the embodiment of the invention;
A kind of concrete structure schematic diagram that disturbs the Control and coordination device that Figure 20 provides for the embodiment of the invention.
Embodiment
The embodiment of the invention is after the frequency spectrum that can be used by unauthorized user changes, consider the suffered interference value that is caused by frequency spectrum resource variation etc. of each transmission channel that current usable spectrum comprises and the current resource block assignments state of regional 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 the frequency spectrum resource do not consider variation in the process that Resource Block is distributed after comprises, in the time of then follow-up use Resource Block might occurring, between the Resource Block that is used in the zones of different more strongly disturbing problem can occur.
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 method, and the idiographic flow schematic diagram of the method may further comprise the steps as shown in Figure 1:
This interference Control and coordination method that provides according to the embodiment of the invention, take by first to after as the situation of Resource Block correspondence first weight factor from large to small of region allocation as example, if in the assigning process of Resource Block, variation has occured in usable spectrum, so that the interference value that is disturbed with regard to the transmission channel under the Resource Block that has been assigned with before usable spectrum changes increases, and so that the interference value that the transmission channel under the Resource Block that will distribute after usable spectrum changes is disturbed reduces (situation that second weight factor that this Resource Block that will distribute namely might occur is significantly smaller than the second weight factor of the Resource Block that has distributed), the such scheme that then provides according to the embodiment of the invention, the use priority of the Resource Block that the use priority of this Resource Block that distributes after usable spectrum changes just might be distributed before usable spectrum changes greater than (being higher than), thereby follow-up when using the Resource Block that distributes, according to using priority, can preferentially use the Resource Block with higher use priority that after usable spectrum changes, distributes, because the interference value that this affiliated transmission channel of Resource Block with higher use priority is disturbed is lower (that is: when using this Resource Block, interference meeting between the different transmission channels is less), and the interference value that transmission channel is disturbed under the above-mentioned Resource Block with low use priority that distributes before usable spectrum changes is higher (that is: when using this Resource Block, interference meeting between the different transmission channels is larger), hence one can see that, adopt this scheme that the embodiment of the invention provides can be according to the current actual state of the transmission channel use priority of adjustresources piece dynamically, after solution can be changed by the frequency spectrum resource that unauthorized user uses effectively, influencing each other between the Resource Block that the frequency spectrum resource do not consider variation in the process that Resource Block is distributed after comprises, 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 occur.
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 to a certain extent the situation of this region resource piece deficiency, in embodiments of the present invention, can use priority for the Resource Block configuration of allotment, wherein the use priority of configuration is lower than use priority corresponding to all Resource Block difference of distributing to this zone, be the mode of a minimum use priority of this resource block assignments of allotment, can be so that can not be subject to the impact of this Resource Block of interim allotment according to the use sequencing of 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, it is different wherein to divide the subregion number that obtains subregion and the distance specific base in this zone between identical and different from 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 the method for providing with the embodiment of the invention in practice be applied as example, describe the detailed applications flow process of the method that the embodiment of the invention provides in detail:
Before this detailed applications flow process is described, need first 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, the 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 current interference value that is disturbed of each transmission channel respectively, such as, α 1+ α 2+ α 3=1 can be set, and α 1 is set, α 2, the interference value relation of being inversely proportional to that α 3 all is disturbed with each self-corresponding transmission channel, 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 altogether 4 bunches among this Fig. 3, is designated as respectively A, B, C, D, and equal 4 base stations are arranged in each bunch, is designated as respectively B
1, B
2, B
3, B
4, and the zone that each base station covers is divided into 3 sectors, each sector in whole bunch is designated as respectively S
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 the 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 the first weight factor corresponding to state that is not assigned with 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 corresponding 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 represent 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, determine the interference value that this transmission channel 2 is disturbed this moment and 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 comprises of transmission channel 2, RB6, RB7, RB8 is corresponding to use priority also to be NaN (Resource Block that uses priority namely 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 for the current state that has been assigned with a Resource Block in sector, therefore need to be the identical weight factor β 2 less than β 1 of each resource block assignments, at this moment, suppose corresponding 3 transmission channel Channel 1, the 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, for same sector, be positioned at the use priority that use priority that "/" front 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 to Resource Block, when authorized user has taken the frequency spectrum resource of transmission channel 2, determine the interference value that this transmission channel 2 is disturbed this moment and 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 comprises of transmission channel 2, RB6, RB7, the corresponding 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
1,3Variation has occured according to use priority to the ordering that Resource Block carries out in what the sector was corresponding, 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 for the current state that has been assigned with a Resource Block in sector, four resource block assignments, therefore need to be the identical weight factor β 3 less than β 2 of each resource block assignments, and further be the identical weight factor β 4 less than β 3 of each resource block assignments, at this moment, suppose corresponding 3 transmission channel Channel 1, the 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, for same sector, the use priority that comes "/" front 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 whole frequency spectrum resource all can be used by unauthorized user, 4 Resource Block that the sector with same sequence number that each base station covers (being the sector with same sequence number with the 1st sector in the 2nd residential quarter such as the 1st sector in the 1st residential quarter) is assigned with are identical, but the use priority of the same resource block that the sector with same sequence number that covers for different base station is distributed is different, such as, the Resource Block RB1 that distributes to the 1st sector in the 1st residential quarter 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 residential quarter 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 occur, if the sector of the same sequence number that covers such as different base station is used Resource Block RB1 simultaneously, then can cause using the interference between the user of this Resource Block to become larger, and have different use priority so that distribute to the same Resource Block of different sectors in the embodiment of the invention, thereby can be so that 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 first to after the use order of Resource Block, the Resource Block that uses successively this sector to be assigned with, namely for 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 larger 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, the sequence of can be dynamically dynamically adjusting the use priority of the Resource Block that each sector is assigned with according to the variation of frequency spectrum, thus can be so that follow-up interference between each transmission channel when using priority to call Resource Block be less.
Similarly, when the authorized user system has taken the frequency spectrum resource of transmission channel 2, determine the interference value that this transmission channel 2 is disturbed this moment and 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 comprises of transmission channel 2, RB6, RB7, the corresponding 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, variation has occured according to use priority to the ordering that Resource Block carries out in what the first sector in the table 6 and the 3rd sector were corresponding.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 have by the use priority correspondence of large (height) to little (low) by first to after choose order, choose successively Resource Block in order to satisfy the demand of tentation data transmission quantity.
In the above-described embodiment, be based on whole frequency 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 altogether M Resource Block, 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 to repeatedly repeat, until till the resource block number that distributes in each sector is N, and newly assigned Resource Block is definite like this sector in:
When the Resource Block that has distributed in each sector that each base station covers is 0, for distributing respectively a mutually different Resource Block in each sector that each base station covers; When the Resource Block that has distributed in each sector that each base station covers during less than N, distribute as follows: (arbitrary sector of 1≤i≤N) cover is (1≤h≤N from the h base station in the i base station, h ≠ i i base station) covers, 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 covers has been assigned with, and this resource block assignments that will choose this sector of covering for the i base station, and the first weight factor of this Resource Block of choosing is less than the 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 for following two kinds of situations and use scheme:
The first situation: the Resource Block between each sector that same base station covers is used temporarily.For this first situation, suppose base station B
iThe signal of the tentation data transmission quantity that the sector that covers is current as shown in figure 10, as sector S
I1Tentation data transmission quantity when larger, 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 if other two sector tentation data transmission quantities change when need increasing the 3rd Resource Block, 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 so that 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.
The second situation: Resource Block is used to other sectors in the sector of occupied Resource Block temporarily.For this second 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 comprises can not be used, and, suppose to know the second weight factor α 1 of channel 1 greater than the second weight factor α 3 of channel 3 by the CR technology this moment, 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, so the interference of using the large Resource Block of the second weight factor β value to produce this moment is less than the interference of using the little Resource Block of β value to produce, 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
I1The Resource 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 with the variation of capacity of communication system of Resource Block, 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, strengthen the even adaptive capacity to the communication service of keeping the occupied sector of channel resource of capacity skewness between the different sectors that the base station is covered, also strengthened simultaneously the adaptive capacity of the professional acute variation in reply sector.
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:
For arbitrary sector, according to the 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 centered by the base station, by use priority correspondence overlay area from outside to inside from high to low, the transmission subchannel that comprises of the Resource Block corresponding with using priority covers a said n strip region successively, namely utilize the outer collar region of the transmission subchannel coverage sector that Resource Block with larger use priority comprises, the transmission subchannel coverage sector inner circle area of utilizing the Resource Block of less use priority to comprise, because it is little to have the multiplex distance of the transmission subchannel that less use priority Resource Block comprises, therefore adopt the above-mentioned method of salary distribution can reduce interference, promote covering quality.Change for above-mentioned tentation data transmission quantity, and according to the situation that changes the number (such as use Resource Block from other sectors temporarily) of adjusting the employed Resource Block in sector, can behind the number of having adjusted Resource Block, correspondingly adjust again the overlay area of using Resource Block.
Below same hypothesis N=4, S=3, and 1 coverage that further specifies Resource Block for example adjustment how dynamically take the base station:
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, have the perimeter that transmission subchannel that the Resource Block 1,5,9 of larger use priority comprises covers corresponding sector, have the interior zone that transmission subchannel that the Resource Block 2,6,10 of less use priority comprises then covers 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 subregion.Wherein, have transmission subchannel that the Resource Block 1,5,9 of larger use priority comprises and cover the perimeter of corresponding sector, have time the central region that transmission subchannel that the large Resource Block 2,6,10 that uses priority comprises covers corresponding sector, have the interior zone that transmission subchannel that the minimum Resource Block 3,7,11 that uses priority comprises covers 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 transmission subchannel that the Resource Block of the use priority with different sizes comprises to these four schematic diagrames that the zone covers.
It may be noted that a bit: embodiments of the invention are to describe as an example of the OFDMA system example, 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, for different parts in the OFDMA system-frame of frequency spectrum resource dynamic change, can in same frame, manage scheduling to the corresponding Resource Block of different parts respectively according to the method provided by the invention.
Correspondingly, the embodiment of the invention also provides a kind of interference Control and coordination device, 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 by unauthorized user and changing, determine the Resource Block that the current transmission channel that can be comprised by the frequency spectrum that unauthorized user uses and transmission channel comprise, and the interference value that is disturbed respectively of definite transmission channel;
Choose unit 202, be used for the arbitrary zone execution for the regional of Resource Block to be allocated: 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;
The first weight factor determining unit 204 is used for determining strategy according to the first weight factor that tactful determining unit 203 is determined, for choosing resource block assignments the first weight factor of choosing unit 202;
Use priority dispensing unit 206, the 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 allocation units 205 with the resource block assignments chosen to this zone after, at the total resources of judging all Resource Block of distributing to this zone during less than this regional tentation data transmission quantity, from the Resource Block of distributing to other zones and not taken by other zones, choose Resource Block and allocate to this zone.
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 the use priority of configuration is lower than use priority corresponding to all Resource Block difference of distributing to this zone.
Preferably, corresponding a kind of implementation of using priority dispensing unit 206 functions can be divided into the following functions 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 the second weight factor of the Resource Block of distribution; The product calculation Executive Module is used for carrying out the second definite weight factor of the second weight factor determination module and the product calculation of the 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 subregion operation, it is different wherein to divide the subregion number that obtains subregion and the distance specific base in this zone between identical and different from the number of the current Resource Block that has been assigned with in this zone; The resource block assignments unit, be used for based on the current use priority order from high to low of having distributed to this regional Resource Block, 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. one kind is disturbed the Control and coordination method, it is characterized in that, comprising:
After detecting the frequency spectrum that can be used by unauthorized user and changing, determine the Resource Block that the current transmission channel that can be comprised by the frequency spectrum that unauthorized user uses and described transmission channel comprise, and determine the interference value that described transmission channel is disturbed respectively; And
Carry out for the arbitrary zone in the regional 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 from different distribution state, determine the definite strategy of the first weight factor corresponding to the current resource block assignments state in this zone; And
Determine strategy according to the first weight factor of determining, be described resource block assignments the first weight factor of choosing;
Give this zone with the described resource block assignments chosen, and according to interference value and described first weight factor of transmission channel under the described Resource Block that distributes, be that priority is used in the described Resource Block configuration 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 less than this regional tentation data transmission quantity, from the Resource Block of distributing to other zones and not taken by other zones, choose Resource Block and allocate to this zone.
3. method as claimed in claim 2 is characterized in that, also comprises:
For priority is used in the described Resource Block configuration of allotment, wherein the use priority of configuration is lower than use priority corresponding to all Resource Block difference of distributing to this zone.
4. the method for claim 1 is characterized in that, according to 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 the second weight factor of the described Resource Block of distribution;
Carry out the product calculation of described the second weight factor and described the 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. such 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, it is different wherein to divide the subregion number that obtains described subregion and the distance specific base in this zone between identical and different from 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. one kind is disturbed the Control and coordination device, it is characterized in that, comprising:
Determining unit, be used for after detecting the frequency spectrum that can be used by unauthorized user and changing, determine the Resource Block that the current transmission channel that can be comprised by the frequency spectrum that unauthorized user uses and described transmission channel comprise, and determine the interference value that described transmission channel is disturbed respectively;
Choose the unit, be used for the arbitrary zone execution for the regional of Resource Block to be allocated: 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;
The strategy determining unit for according to the predetermined first weight factor definite strategy corresponding from different distribution state, is determined the definite strategy of the first weight factor corresponding to the current resource block assignments state in this zone;
The first weight factor determining unit, the 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 choosing the described resource block assignments of unit selection to this zone;
Use the priority dispensing unit, described the 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, after giving this zone in the described resource block assignments that allocation units will be chosen, at the total resources of judging all Resource Block of distributing to this zone during less than this regional tentation data transmission quantity, from the Resource Block of distributing to other zones and not taken by other zones, choose Resource Block and allocate to this zone.
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 the use priority of configuration is lower than use priority corresponding to all Resource Block difference 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 the second weight factor of the described Resource Block of distribution;
The product calculation Executive Module is used for carrying out definite described the second weight factor of the second weight factor determination module and the product calculation of described the first weight factor, obtains the product calculation result;
Use the priority determination module, the use priority of the described Resource Block that the described product calculation result who is used for that the product calculation Executive Module is obtained is defined as distributing.
10. such 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 subregion operation, it is different wherein to divide the subregion number that obtains described subregion and the distance specific base in this zone between identical and different from the number of the current Resource Block that has been assigned with in this zone;
The resource block assignments unit, be used for based on the current use priority order from high to low of having distributed to this regional Resource Block, with distribute to this regional Resource Block distribute to successively division unit divide obtain, and described specific base between distance each described subregion from far near.
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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 |
| US20150223077A1 (en) * | 2014-02-05 | 2015-08-06 | Qualcomm Incorporated | Methods for inter-operator coexistence on shared spectrum or unlicensed bands |
| CN106304090B (en) * | 2015-05-13 | 2021-11-23 | 索尼公司 | Method and device for suppressing interference in dynamic spectrum access system |
| JP7415927B2 (en) * | 2018-08-28 | 2024-01-17 | ソニーグループ株式会社 | Communication control device, communication control method, and communication device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
|---|---|---|---|---|
| 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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