CN102413517A - Selection method of residence sub-band - Google Patents
Selection method of residence sub-band Download PDFInfo
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- CN102413517A CN102413517A CN2010102909881A CN201010290988A CN102413517A CN 102413517 A CN102413517 A CN 102413517A CN 2010102909881 A CN2010102909881 A CN 2010102909881A CN 201010290988 A CN201010290988 A CN 201010290988A CN 102413517 A CN102413517 A CN 102413517A
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Abstract
The invention provides a selection method of a residence sub-band. In the method, in each residence sub-band selection period, a hardware capability of UE, a position and a sub-band load state in a system are comprehensively regarded so as to select the residence sub-band of a user. Through periodically and dynamically selecting the residence sub-band of a current edge user or a center user, on one hand, an effect of inhibiting interference of resource configuration of the edge sub-band and the center sub-band to a cell can be effectively performed; on the other hand, the edge user can not appear a starved situation caused by limitation of the configuration of the edge sub-band. Therefore, a system throughput can be effectively increased.
Description
Technical field
The present invention relates to the radio resource management techniques in the GSM, particularly relate to a kind of system of selection of resident subband.
Background technology
At present, in many subbands ofdm system, system's available bandwidth is divided into a plurality of continuous or discrete subbands, adopts OFDM (OFDM) technical transmission on each subband.A typical application scene is the electric power load monitoring and control communication network; Its frequency spectrum is discrete is distributed in the 230M frequency range, and Fig. 1 is power network 230MHz band frequency resource map, and is as shown in Figure 1; Its bandwidth is 8.15MHz; Have the subband of 40 25kHz, the subband of minimum frequency is 223.525MHz, and the subband of high frequency points is 231.675MHz.
Because the number of sub carrier wave that each subband carries is less, and subcarrier is discontinuous between different sub-band, if subscriber equipment (UE) will receive the signal of whole subbands, its receiver bandwidth must reach the whole system bandwidth, and this will make that the manufacturing cost of UE is very high.In order to reduce the cost of UE, can cancel UE and must operate at the restriction on whole subbands, UE is operated on all or part of subband according to the different choice of hardware capabilities, and the most weak UE of ability can only be operated on the single subband.
In order to support list band UE, down control channel (PDCCH) must independent transmission on each subband.For list band UE, transceive data can only be on same subband with monitoring PDCCH; For many subbands UE, transceive data with monitor PDCCH can be on different subbands, but the subband span can not surpass the restriction of UE hardware capabilities.No matter be list band UE or many subbands UE, its subband of monitoring PDCCH all has only one, and this subband is called the resident subband of UE.When UE inserted at random, the base station can select idle subband as resident subband for UE at random.
On the other hand, owing to adopted the air interface design based on the OFDM technology, the user has solved the problem of disturbing in the sub-district better through the quadrature of frequency division realization signal in the sub-district.But, can bring stronger presence of intercell interference during identical networking as cost.Cell Edge User is far away from serving BS, and the received power of useful signal is lower, and influence more easily therefore is interfered; Simultaneously, Cell Edge User is nearer from adjacent sub-district, in the upstream data process of transmitting, also interference is caused in more adjacent sub-district.Particularly when the edge customer of neighbor cell has resided on the identical subband, the possibility that produces presence of intercell interference will increase greatly.How to avoid this situation to take place, improve the signal to noise ratio of Cell Edge User, and then improve the throughput of edge customer, a major issue must considering when becoming system design.
When UE inserted at random, user position information can't be known in the base station, can only cause the resident subband conflict of edge customer of neighbor cell possibly randomly for UE selects resident subband from the subband of free time, brought presence of intercell interference.At this moment, even adopt traditional Inter-Cell Interference Coordination scheme (like partial frequency multiplexing (FFR), soft-frequency reuse (SFR) etc.), can't effectively reduce the interference of minizone.Because; These Inter-Cell Interference Coordination schemes all require when resource allocation, sub-district inward flange user to be forbidden the partial-band resource; 7 cell topology sketch mapes with shown in Fig. 2 are example; Each sub-district is edge subband and two parts of center sub-band with the available band resource division of oneself all among the figure, and edge customer only can use the resource transceive data of edge subband, and the edge subband of neighbor cell needs quadrature.Like this, in case certain edge customer has resided on the subband of forbidding, very likely can can't obtain resource allocation, thereby the phenomenon that edge customer " is died of hunger " occur because of the limited user of causing of UE hardware capabilities.When a large amount of edge customers reside on the forbidding subband, only not only can not improve the performance of edge customer with the interference coordination schemes that combines resource allocation, can have a strong impact on the throughput of edge customer on the contrary.Therefore, be necessary when selecting the resident subband of user, just to consider how to reduce the factor of presence of intercell interference.
A kind of resident subband system of selection that can reduce interference and can improve throughput of system is not proposed at present as yet.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of system of selection of resident subband, and this method can reduce presence of intercell interference and improve throughput of system.
In order to achieve the above object, the technical scheme of the present invention's proposition is:
A kind of system of selection of resident subband, this method may further comprise the steps:
When the selection cycle of resident subband arrives; According to the resident user profile on the resident user list in current sub-district and current all subbands, be built with the resident edge subband tabulation of central user, the list belt edge user list of resident center sub-band and many subbands edge customer tabulation of resident center sub-band;
The resident edge subband tabulation of central user is arranged when empty when said; For said each subband that has in the resident edge subband tabulation of central user; If the resident number of users on this subband reaches preset saturation threshold; Then select a central user, and in the center sub-band of current free time, select a new resident subband as selected central user from this edge subband;
When the list belt edge user list of said resident center sub-band is not sky; For each the list belt edge user in the list belt edge user list of said resident center sub-band, from the edge subband of current free time, select a new resident subband as this list belt edge user;
When many subbands edge customer tabulation of said resident center sub-band is not sky; For each the many subbands edge customer in the tabulation of many subbands edge customer of said resident center sub-band, if the resident subband of this many subbands edge customer (max (and 0, i-n+1); Min (j+n-1, N
SB-1)) outside the scope, and (max (0, i-n+1), min (j+n-1, N
SBIdle subband is arranged-1)), then from (max (and 0, i-n+1), min (j+n-1, N
SB-1)) selects the new resident subband of an idle subband in the scope as this many subbands edge customer; Wherein, said N
SBBe the available sub-band sum in the system, i is the subband numbering of edge subband scope original position, and j is the subband numbering of edge subband scope final position, and n is the maximum functional sub band number that many subbands edge customer can be supported.
In sum, the system of selection of the resident subband of user that the present invention proposes at the selection cycle of each resident subband, is taken all factors into consideration the load condition of subband in hardware capabilities, position and the system of UE, and user's resident subband is selected.Like this; Through periodically the resident subband of current edge customer or central user being carried out Dynamic Selection; Can effectively bring into play the inhibitory action of the resource distribution of edge subband and center sub-band on the one hand to the interference of minizone; Also can effectively avoid edge customer to be subject to the configuration of edge subband on the other hand and occur, thereby can effectively improve throughput of system by situation hungry to death.
Description of drawings
Fig. 1 is a power network 230MHz band frequency resource distribution sketch map;
Fig. 2 is the MRP sketch map of traditional Inter-Cell Interference Coordination scheme;
Fig. 3 is the resident subband range of choice of a many subbands edge customer sketch map;
Fig. 4 is the schematic flow sheet of the embodiment of the invention one.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing and specific embodiment that the present invention is done to describe in detail further below.
Core concept of the present invention is: the present invention carries out on the basis of the technical scheme that edge subband and center sub-band divide and dispose local resource in existing interference coordination schemes; Through periodically the resident subband of current edge customer or central user being carried out Dynamic Selection, reduce the interference of minizone.At the selection cycle of each resident subband, will take all factors into consideration the load condition of subband in hardware capabilities, position and the system of UE, user's resident subband is selected.Like this; Can bring into play on the one hand existing interference coordination schemes and utilize the division of edge subband and center sub-band to reach the purpose of inhibition presence of intercell interference, the while can avoid edge customer limited owing to the UE hardware capabilities and quilt that can't be assigned to due to the data transmission resources " is died of hunger " phenomenon again.
To above-mentioned thought, the present invention will adopt following principle to carry out the selection of the resident subband of user.
1, list belt edge user's resident subband selection principle
Can only be operated on the resident subband and edge customer only can use the resource transmission data characteristic of edge subband to list band UE, restriction list belt edge user can only reside on the edge subband.
If certain list belt edge user is resident having arrived on the center sub-band when inserting at random, resident subband need reselect idle edge subband as resident subband for this user, and indication UE is switched in the base station after knowing this user position information.
2, the resident subband of many subbands edge customer is selected
For many subbands UE since can be outside resident subband transceive data, therefore many subbands edge customer both can reside in the edge subband, also can reside in center sub-band.But when many subbands edge customer resided in center sub-band, its resident subband can not surpass the restriction of UE hardware capabilities to the subband span of nearest edge subband.As shown in Figure 3, supposing the system can be N with sub-band sum
SB, edge subband scope be (i, j), the maximum functional sub band number that many subbands edge customer can be supported is n, then the resident subband scope that can select of this user for (max (and 0, i-n+1), min (j+n-1, N
SB-1)).
If certain many subbands edge customer is resident having arrived outside the above-mentioned subband scope when inserting at random, the base station needs to select resident subband for this user again after knowing this user position information.Restriction when considering resource allocation, in order to utilize the UE ability more fully, it is many as far as possible when selecting resident subband for many subbands edge customer, should to make this user can access the sub band number of resource allocation, (max (0, i-n+1), min (j+n-1, N
SB-1) the more excellent principle of) selecting in the scope can for:
1) if n>=j-i+1, then preferentially (max (and 0, j-n+1), min (i+n-1, N
SB-1)) select the resident subband of idle subband in the scope as this user, this moment this user to access the maximum sub band number of resource allocation be the sub-band sum j-i+1 of edge subband.If there is not idle subband in this scope, again from (max (and 0, i-n+1), max (0, j-n+1)) or (min (i+n-1, N
SB-1), min (j+n-1, N
SB-1)) selects in the scope;
2) if n＜j-i+1, then preferentially (i j) selects the resident subband of idle subband as this user in the scope, this moment this user to access the maximum functional sub band number that the maximum sub band number of resource allocation can support for this user be n.If there is not idle subband in this scope, again from (max (and 0, i-n+1), i) or (j, min (j+n-1, N
SB-1)) selects in the scope.
3, the resident subband of central user is selected
Because central user does not receive the restriction of edge subband when resource allocation, so resident subband can be selected for central user in the base station in system can use the subband scope.But, when the system edges load is heavier, in order to guarantee the performance of edge customer, need reselects idle center sub-band and carry out residently for residing in central user on the edge subband, and indication UE switches resident subband.
Switch in order to reduce unnecessary resident subband; With the presaturation thresholding that the edge subband is set in advance; If certain central user is the resident edge subband that arrived when inserting at random, the edge subband load condition that this user is resident is judged in the base station after knowing user position information; Have only when the resident edge subband of this user approaches to saturation, just need to select resident subband for this user again.
When being equally applicable to change in the UE position, the selection principle of above-mentioned resident subband reselects resident subband for the user.
System of selection below in conjunction with a pair of resident subband of realizing based on mentioned above principle of the specific embodiment of the invention is set forth.Fig. 4 is the schematic flow sheet of this embodiment one.As shown in Figure 4, this embodiment comprises:
Step 401, when the selection cycle of resident subband arrives; According to the resident user profile on the resident user list in current sub-district and current all subbands, be built with the resident edge subband tabulation of central user, the list belt edge user list of resident center sub-band and many subbands edge customer tabulation of resident center sub-band.
Here; When the selection cycle of each resident subband arrives, trigger selection to resident subband, in this step at first according to the resident user profile on the resident user list in current sub-district and current all subbands; Determine three tabulations; The resident edge subband tabulation of central user, the list belt edge user list of resident center sub-band and many subbands edge customer tabulation of resident center sub-band are promptly arranged, so that utilize these tabulations, based on the selection principle of above-mentioned resident subband in step 402; To the central user on the big edge subband of load, reside at the list belt edge user of center sub-band and reside in the many subbands edge customer on the center sub-band outside its hardware capabilities; Carry out the selection of new resident subband, to avoid occurring aforementioned because UE limited ability and phenomenon hungry to death, thereby improve the throughput of system.
Particularly, when making up above-mentioned three tabulations, need read the resident user list in sub-district earlier, obtain the resident user profile on all subbands, comprise the resident sub-reel number locat of UE sign UeId, UE
NumAnd Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) UE
C-RNTI(C-RNTI is used for unique identification and resides in the UE on certain subband); According to central user and edge customer resident on each subband of these Information Statistics, obtain the resident edge subband tabulation of central user, the list belt edge user list of resident center sub-band and many subbands edge customer tabulation of resident center sub-band based on this at last then.
For the selection cycle of the resident subband in this step, when its value is excessive, can avoid the frequency of resident subband gravity treatment excessive; But may influence the transmission performance of edge customer, when its value is too small, then can guarantee the transmission performance of edge customer; But can increase the complexity and control signaling consumption of system owing to the frequency that resident subband is selected is excessive; In practical application, those skilled in the art can be according to actual needs be that it selects suitable value through emulation, and main in the emulation what consider is that the satisfaction of edge customer (comprises throughput; Time delay and packet loss) and control signaling expense; Also will consider the disposal ability of real system in addition, total principle should be on the edge of under the user satisfaction acceptable prerequisite, and selection cycle is the bigger the better.
Step 402, the resident edge subband tabulation of central user is arranged when empty when said; For said each subband that has in the resident edge subband tabulation of central user; If the resident number of users on this subband reaches preset saturation threshold; Then select a central user, and in the center sub-band of current free time, select a new resident subband as selected central user from this edge subband.
In this step, said preset saturation threshold is when its value is excessive; Can avoid the frequency of resident subband gravity treatment excessive, but may influence the transmission performance of edge customer, when its value is too small; Then can guarantee the transmission performance of edge customer, but can be owing to the excessive complexity that increases system of frequency of resident subband selection, in practical application; Those skilled in the art can select suitable value through emulation for it according to actual needs; Main consideration is the satisfaction (comprising throughput, time delay and packet loss) of edge customer and the expense of control signaling in the emulation, also will consider the disposal ability of real system in addition; Total principle should be on the edge of under the user satisfaction acceptable prerequisite, selects saturation threshold to be the bigger the better.
In practical application, this saturation threshold is smaller or equal to the maximum number of users thresholding that can be resident of list band.
Here, said from central user of this edge subband selection, can adopt optional mode to realize.
Saidly in the center sub-band of current free time, select a new resident subband, also adopt optional mode to realize as selected central user
When the list belt edge user list of said resident center sub-band is not sky; For each the list belt edge user in the list belt edge user list of said resident center sub-band, from the edge subband of current free time, select a new resident subband as this list belt edge user.
Saidly from the edge subband of current free time, select a new resident subband, can adopt optional mode to realize as this list belt edge user.
Here; Further; For each list belt edge user, after from the edge subband of current free time, selecting a new resident subband, can also do further adjustment to the central user on the new resident subband of this list belt edge user as this list belt edge user; Further to make the current edge sub band resources that the free time as much as possible is arranged; Offer the edge customer that follow-up needs carry out resident subband adjustment, so can guarantee the sustainability that resident subband is selected, thereby make the subband in each cycle select flow process to optimize more.Particularly, can realize through following method:
Judge whether number of users resident on the edge subband of current selected free time has reached said saturation threshold; If; Then judge on the edge subband of selected free time whether central user is arranged; If then from the edge subband of selected free time, select a central user, and from the center sub-band of current free time, select a new resident subband as this central user.
When many subbands edge customer tabulation of said resident center sub-band is not sky; For each the many subbands edge customer in the tabulation of many subbands edge customer of said resident center sub-band, if the resident subband of this many subbands edge customer (max (and 0, i-n+1); Min (j+n-1, N
SB-1)) outside the scope, and (max (0, i-n+1), min (j+n-1, N
SBIdle subband is arranged-1)), then from (max (and 0, i-n+1), min (j+n-1, N
SB-1)) selects the new resident subband of an idle subband in the scope as this many subbands edge customer.
Wherein, said N
SBBe the available sub-band sum in the system, i is the subband numbering of edge subband scope original position, and j is the subband numbering of edge subband scope final position, and n is the maximum functional sub band number that many subbands edge customer can be supported.
Here, through be resident subband (max (and 0, i-n+1), min (j+n-1, N
SB-1)) the many subbands edge customer outside the scope, as far as possible again (max (and 0, i-n+1), min (j+n-1, N
SB-1)) selects new resident subband within the scope; Can avoid as far as possible because of resource distribution to the restriction of edge customer and many subbands user transceive data with monitor PDCCH on different subbands the time subband span can not surpass the edge customer that the restriction of UE hardware capabilities cause and can't be assigned to the phenomenon of transfer resource, thereby can effectively improve the throughput of system.
Preferably, in order to utilize the UE ability more fully, when selecting resident subband for many subbands edge customer, it is many as far as possible to guarantee that this many subbands edge customer can access the sub band number of resource allocation, said from (max (and 0, i-n+1), min (j+n-1, N
SB-1)) select an idle subband can adopt following method to realize in the scope as the new resident subband of this many subbands edge customer:
When n>=j-i+1, if current (max (0, j-n+1), min (i+n-1, N
SB-1)) idle subband is arranged in the scope, then (max (and 0, j-n+1), min (i+n-1, N
SB-1)) select the resident subband of the subband of a free time in the scope as said many subbands edge customer, otherwise, (max (0, i-n+1), max (0, j-n+1)) or (min (i+n-1, N
SB-1), min (j+n-1, N
SB-1)) selects the new resident subband of the subband of a free time in the scope as said many subbands edge customer.
When n＜j-i+1, if current (i j) has idle subband in the scope, then (i j) selects the resident subband of an idle subband as said many subbands edge customer in the scope, otherwise, (max (0, i-n+1), i) or (j, min (j+n-1, N
SB-1)) selects the new resident subband of the subband of a free time in the scope as said many subbands edge customer.
Here need to prove among the present invention, judge whether the free time is to confirm according to number of users resident on this subband to a subband, when user resident on this subband can be resident on less than the list band maximum number of user the time, it is idle then to be judged to be this subband.Occurrence that wherein should the resident number of users of maximum is decided by system design, specifically depend on each subband the running time-frequency resource that can provide can service that satisfy its qos requirement be provided for what UE.
In practical application, after execution of step 402 is determined in the selection cycle of current resident subband the user of all selections that need carry out resident subband again, system will unify these users are carried out the resident of new subband.
Through the concrete realization flow of embodiment one embodiment one is done further below and set forth.
1. beginning, this flow process is execution in step 2 when system initialization, and execution in step 4 is to step 11 when each resident subband selection cycle timing arrives.
2. obtain relevant configuration information, comprise the number of users thresholding UE that each professional subband can be resident
Max, edge subband presaturation thresholding coefficient lambda, and carry out the cycle T that resident subband is selected.
3. judge whether resident subband selection cycle regularly arrives, if, execution in step 4; Otherwise continue to wait for timing arrives.
4. read the resident user list in sub-district, obtain the resident user profile on all subbands, comprise the resident sub-reel number locat of UE sign UeId, UE
NumWith C-RNTI value UE
C-RNTI
5. add up central user and edge customer resident on each subband, be configured with the resident edge subband tabulation of central user, the list belt edge user list of resident center sub-band and many subbands edge customer tabulation of resident center sub-band.
6. judged whether that central user resides in the edge subband, if, execution in step 7; Otherwise change step 8 over to.
7. the resident subband of central user is selected, and this step specifically comprises following substep:
1) the resident edge subband tabulation of central user is read in beginning.
2) select that first subband in the resident edge subband tabulation of central user is arranged.
3) judge resident number of users UE on this edge subband
AttachedWhether reached the presaturation thresholding:
Wherein, ' 1 ' expression reaches the presaturation thresholding, and ' 0 ' expression does not reach the presaturation thresholding.If this edge subband has reached the presaturation thresholding, execution in step 4), otherwise change step 7) over to, here, λ is a proportionality coefficient, λ UE
MAXBeing used to indicate the presaturation thresholding of resident number of users on the edge subband, when concrete the realization, can also be the number of UE with the presaturation threshold setting, so just can resident number of users and thresholding directly have been compared.
4) judged whether that center sub-band is idle:
Wherein ' 1 ' and this subband of expression is idle, and this subband of ' 0 ' expression is saturated.If have center sub-band idle, execution in step 5); Otherwise change step 9) over to.
5) select a central user from this edge subband.
6) reselect resident subband from the center sub-band of current free time for this central user, and add resident subband to and select information list.Change step 3) over to.
7) judge whether this subband is last subband that has in the resident edge subband tabulation of central user, if change step 9) over to; Otherwise execution in step 8).
8) select that the next subband in the resident edge subband tabulation of central user is arranged, change step 3) over to.
9) step 7 finishes.
8. judged whether that list belt edge user resides in center sub-band, if, execution in step 9; Otherwise change step 10 over to.
9. the resident subband of list belt edge user is selected, and this step specifically comprises following substep:
1) begins, read the list belt edge user list of resident center sub-band.
2) first user in the list belt edge user list of the resident center sub-band of selection.
3) judged whether that the edge subband is idle, if, execution in step 4); Otherwise change step 11) over to.
4) from the edge subband of current free time, reselect resident subband, and add resident subband to and select information list for this list belt edge user.
5) be judged as on the resident subband that this list belt edge user selects and whether have central user resident, if, execution in step 6), otherwise change step 9) over to.
6) judge resident number of users UE on this subband
AttachedWhether reached the presaturation thresholding, if, execution in step 7), otherwise change step 9) over to.
7) select a central user from this subband.
8) from the center sub-band of current free time, reselect resident subband, and add resident subband to and select information list for this central user.
9) judge that whether this list belt edge user is last user in the list belt edge user list of resident center sub-band, if change step 11) over to; Otherwise execution in step 10).
10) the next user in the list belt edge user list of the resident center sub-band of selection changes step 3) over to.
11) step 9 finishes.
10. judged whether that many subbands edge customer resides in center sub-band, if, execution in step 11; Otherwise change step 12 over to.
11. the resident subband of many subbands edge customer is selected, this step specifically comprises following substep:
1) beginning, many subbands edge customer tabulation of reading resident center sub-band.
2) first user in many subbands edge customer tabulation of the resident center sub-band of selection.
3) the resident subband of judging this user whether (max (and 0, i-n+1), min (j+n-1, N
SB-1)) outside the scope scope, if, execution in step 4); Otherwise change step 17 over to).
4) judge that maximum functional sub band number that many subbands edge customer can be supported is that n is (whether i j) satisfies n >=j-i+1, if, execution in step 5) with edge subband scope; Otherwise change step 9) over to.
5) judge (max (0, j-n+1), min (i+n-1, N
SB-1)) whether there is subband idle in the scope, if, execution in step 6); Otherwise change step 7) over to.
6) from (max (and 0, j-n+1), min (i+n-1, N
SB-1)) reselects resident subband for this many subbands edge customer in the scope, and add resident subband to and select information list, change step 13) over to.
7) judge (max (0, i-n+1), max (0, j-n+1)) or (min (i+n-1, N
SB-1), min (j+n-1, N
SB-1)) whether there is subband idle in the scope, if, execution in step 8); Otherwise change step 17 over to).
8) from (max (and 0, i-n+1), max (0, j-n+1)) or (min (i+n-1, N
SB-1), min (j+n-1, N
SB-1)) reselects resident subband for this many subbands edge customer in the scope, and add resident subband to and select information list, change step 13) over to.
9) judged whether that the edge subband is idle, if, execution in step 10); Otherwise change step 11) over to.
10) from the edge subband of current free time, reselect resident subband, and add resident subband to and select information list, change step 13) over to for this many subbands edge customer.
11) judge (max (0, i-n+1), i) or (j, min (j+n-1, N
SB-1)) whether there is subband idle in the scope, if, execution in step 12); Otherwise change step 17 over to).
12) from (max (and 0, i-n+1), i) or (j, min (j+n-1, N
SB-1)) reselects resident subband for this many subbands edge customer in the scope, and add resident subband to and select information list.
13) be judged as on the resident subband that this many subbands edge customer selects and whether have central user resident, if, execution in step 14), otherwise change step 17 over to).
14) judge resident number of users UE on this subband
AttachedWhether reached the presaturation thresholding, if, execution in step 15), otherwise change step 17 over to).
15) select a central user from this subband.
16) from the center sub-band of current free time, reselect resident subband, and add resident subband to and select information list for this central user.
17) judge that whether this many subbands edge customer is last user in many subbands edge customer tabulation of resident center sub-band, if change step 19 over to); Otherwise execution in step 18).
18) the next user in many subbands edge customer tabulation of the resident center sub-band of selection changes step 3) over to.
19) step 11 finishes.
Select information list 12. export resident subband.Change step 3 over to, wait for cycle timing arrives next time.
Can find out by technique scheme; The present invention is through periodically carrying out Dynamic Selection to the resident subband of current edge customer or central user; Can effectively bring into play the inhibitory action of the resource distribution of edge subband and center sub-band on the one hand to the interference of minizone; Also can effectively avoid edge customer to be subject to the configuration of edge subband on the other hand and occur, thereby can effectively improve throughput of system by situation hungry to death.
In sum, more than being merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. the system of selection of a resident subband is characterized in that, this method may further comprise the steps:
When the selection cycle of resident subband arrives; According to the resident user profile on the resident user list in current sub-district and current all subbands, be built with the resident edge subband tabulation of central user, the list belt edge user list of resident center sub-band and many subbands edge customer tabulation of resident center sub-band;
The resident edge subband tabulation of central user is arranged when empty when said; For said each subband that has in the resident edge subband tabulation of central user; If the resident number of users on this subband reaches preset saturation threshold; Then select a central user, and in the center sub-band of current free time, select a new resident subband as selected central user from this edge subband;
When the list belt edge user list of said resident center sub-band is not sky; For each the list belt edge user in the list belt edge user list of said resident center sub-band, from the edge subband of current free time, select a new resident subband as this list belt edge user;
When many subbands edge customer tabulation of said resident center sub-band is not sky; For each the many subbands edge customer in the tabulation of many subbands edge customer of said resident center sub-band, if the resident subband of this many subbands edge customer (max (and 0, i-n+1); Min (j+n-1, N
SB-1)) outside the scope, and (max (0, i-n+1), min (j+n-1, N
SBIdle subband is arranged-1)), then from (max (and 0, i-n+1), min (j+n-1, N
SB-1)) selects the new resident subband of an idle subband in the scope as this many subbands edge customer; Wherein, said N
SBBe the available sub-band sum in the system, i is the subband numbering of edge subband scope original position, and j is the subband numbering of edge subband scope final position, and n is the maximum functional sub band number that many subbands edge customer can be supported.
2. method according to claim 1 is characterized in that, said from the edge subband of current free time, the selection further comprises after the new resident subband as this list belt edge user:
Judge whether the resident number of users on the edge subband of current selected free time has reached said saturation threshold; If; Then judge when whether central user being arranged on the edge subband of selected free time; If then from the edge subband of selected free time, select a central user, and from the center sub-band of current free time, select a new resident subband as this central user.
3. method according to claim 1 is characterized in that, said from (max (and 0, i-n+1), min (j+n-1, N
SB-1)) select an idle subband to be in the scope as the new resident subband of this many subbands edge customer:
When n>=j-i+1, if current (max (0, j-n+1), min (i+n-1, N
SB-1)) idle subband is arranged in the scope, then (max (and 0, j-n+1), min (i+n-1, N
SB-1)) select the resident subband of the subband of a free time in the scope as said many subbands edge customer, otherwise, (max (0, i-n+1), max (0, j-n+1)) and (min (i+n-1, N
SB-1), min (j+n-1, N
SB-1)) selects the new resident subband of the subband of a free time in the scope as said many subbands edge customer;
When n＜j-i+1, if current (i j) has idle subband in the scope, then (i j) selects the resident subband of an idle subband as said many subbands edge customer in the scope, otherwise, (max (0, i-n+1), i) or (j, min (j+n-1, N
SB-1)) selects the new resident subband of the subband of a free time in the scope as said many subbands edge customer.
4. method according to claim 1 is characterized in that, and is said from central user of this edge subband selection, adopts optional mode.
5. method according to claim 1 is characterized in that, saidly in the center sub-band of current free time, selects the new resident subband as selected central user, adopts optional mode.
6. method according to claim 1 is characterized in that, saidly from the edge subband of current free time, selects the new resident subband as this list belt edge user, adopts optional mode.
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| CN110662282A (en) * | 2018-06-28 | 2020-01-07 | 普天信息技术有限公司 | Method and device for controlling whether terminal uses synchronous frame in electric power wireless private network |
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