CN102573082B - Method and equipment for inter-adjacent cell interference coordination in wireless communication system - Google Patents
Method and equipment for inter-adjacent cell interference coordination in wireless communication system Download PDFInfo
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Abstract
The invention relates to a method and equipment for inter-adjacent cell interference coordination in a wireless communication system. The equipment of a target cell acquires priority resource block domain information of other cells in adjacent common-frequency cell groups and total edge load information of the adjacent common-frequency cell groups; and priority resource block domains of the target cell is updated according to the priority resource block domain information of other cells, the edge load information of the target cell and the total edge load information. The method and the equipment have the advantages that: priority frequency domains can be adjusted by combining HII in load indication information according to the distribution of cell edge loads.
Description
Technical field
The present invention relates to field of wireless communications systems, more particularly, to disturbed between the neighbor cell of wireless communication system
The method and apparatus coordinated.
Background technology
In cellular networks, edge customer equipment can cause greatly to disturb to using the neighbor cell of same frequency band.For
Coordination co-channel interference, it is stipulated that exchange load information and interference coordination information by X2 interface in 3GPP LTE protocol.
For base station (for example, eNodeB), intelligently determine the load instruction information of oneself and response from other eNodeB's
Load instruction information is very important.
Currently existing best solution is called static soft partial frequency multiplexing (S-SFFR), in S-SFFR mechanism,
All user equipmenies of center of housing estate can be transmitted using all of frequency resource.And to Cell Edge User equipment, entirely
Frequency band is divided into non-preferential frequency domain and preferential frequencies domain, if being scheduled in non-preferential frequency domain, its transmit power spectrum is close
Degree is strictly limited less than certain level, and performance is subject to a definite limitation；In preferential frequencies domain, then can send out by normal power
Send.Preferential frequencies domain is manual configuration or equal proportion division between neighbor cell.If the HII in load instruction information
(high interference instruction) corresponding Physical Resource Block (PRB) belongs to the preferential domain of cell, then this HII is set to " 1 ", is otherwise provided as
“0”.Regardless of receiving load instruction information content, the preferential domain of the value of HII and eNodeB keeps constant.
But, the premise that S-SFFR mechanism will reach preferable performance is the edge customer equipment between different neighbor cells
Load is balance, and this difficult to reach in actual deployment scenario.In actual scene, co-frequency cell (intra-
Frequency cells) one of the situation a lot of more than other cells of edge load of cell often occur, this will compel
This cell is made to need to dispatch Cell Edge User equipment in non-preferential frequency domain.Simultaneously as the edge customer of other cells
Seldom, their preferential frequencies domain is not just used effectively apparatus of load.At this moment, S-SFFR mechanism performance have larger under
Fall, presence of intercell interference can be very serious.
Content of the invention
It is an object of the invention to provide a kind of method carrying out interference coordination between the neighbor cell of wireless communication system with
Equipment.
According to an aspect of the present invention, provide a kind of the wireless communication system based on OFDMA be used for carry out adjacent
The method of interference coordination between the group of co-frequency cell, wherein, described adjacent co-frequency cell group includes Target cell and adjacent thereto its
His cell, the method comprises the following steps:
A obtains the prioritized resources block domain information of other cells described and the total edge load letter of described adjacent co-frequency cell group
Breath；
B is according to the prioritized resources block domain information of other cells described, and the edge load information of Target cell is total with described
Edge load information comes the prioritized resources block domain of more new target cell, and wherein, described edge load information includes the position of HII value
Figure,
Described step b includes：
- according to below equation calculate update after described Target cell prioritized resources block domain lengthWherein SelfCellEdgeLoad represents the edge of described Target cell
Load information, TotalEdgeLoad represents described total edge load information, and Δ SelfCellEdgeLoad represents that described target is little
The detection changing value of the cell edge load information in area, N represents total number of resource blocks of described adjacent co-frequency cell group, and,
- determine the prioritized resources block domain after its renewal for described Target cell, the prioritized resources block domain tool after described renewal
Length determined by having.
According to another aspect of the present invention, additionally provide a kind of the wireless communication system based on OFDMA be used for into
The equipment of interference coordination between row adjacent co-frequency cell group, wherein, described adjacent co-frequency cell group includes Target cell and phase therewith
Other adjacent cells, wherein, this equipment includes:
Acquisition device, for obtaining the prioritized resources block domain information of other cells described and described adjacent co-frequency cell group
Total edge load information；
Updating device, for the prioritized resources block domain information according to other cells described, and the edge load of Target cell
Information and described total edge load information come the prioritized resources block domain of more new target cell, wherein, described edge load packet
Include the bitmap of HII value,
Described updating device is configured to execute following operation：
- according to below equation calculate update after described Target cell prioritized resources block domain lengthWherein SelfCellEdgeLoad represents the edge of described Target cell
Load information, TotalEdgeLoad represents described total edge load information, and Δ SelfCellEdgeLoad represents that described target is little
The detection changing value of the cell edge load information in area, N represents total number of resource blocks of described adjacent co-frequency cell group, and,
- determine the prioritized resources block domain behind the prioritized resources block domain after its renewal, and described renewal for described Target cell
Length determined by having.
Compared with prior art, the present invention has advantages below：Can be distributed according to cell edge load, and refer to reference to load
Show the HII in information, to adjust preferential frequencies domain.
Brief description
By reading the detailed description that non-limiting example is made made with reference to the following drawings, other of the present invention
Feature, objects and advantages will become more apparent upon：
Fig. 1 is the wireless communication system topology figure of the present invention；
Fig. 2 is the flow chart for carrying out the method for interference coordination between the group of adjacent co-frequency cell of one aspect of the invention；
Fig. 3 is the flow process for carrying out the method for interference coordination between the group of adjacent co-frequency cell of another aspect of the invention
Figure；
Fig. 4 is the prioritized resources block domain distribution schematic diagram of adjacent co-frequency cell group；
Fig. 5 is the equipment schematic diagram for carrying out interference coordination between the group of adjacent co-frequency cell of one aspect of the invention；
Fig. 6 is the equipment schematic diagram for carrying out interference coordination between the group of adjacent co-frequency cell of another aspect of the invention；
In accompanying drawing, same or analogous reference represents same or analogous part.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further detail.
Fig. 1 is the wireless communication system topology figure of the present invention.Described wireless communication system includes multiple adjacent co-frequency cells
Group, wherein, adjacent co-frequency cell group A includes multiple cells, for example, cell 1, cell 2, cell 3 ... cell K.Wherein,
It is each provided with equipment in each cell, for example, be provided with equipment 1 in cell 1, be provided with equipment 2 in cell 2, arrange in cell 3
There is in equipment 3, cell 4 in the equipment 4 that is provided with, cell 5 in the equipment 5 that is provided with, cell 6 setting in the equipment 6 that is provided with, cell 7
There is equipment 7 etc., the equipment between each cell can be in communication with each other.
Described wireless communication system is including but not limited to：LTE or WiMAX system etc., be including but not limited to especially：1)
Wireless communication system based on OFDMA；2) wireless communication system based on TDMA etc..Each equipment, for example, equipment 1, equipment 2, sets
Standby 3, equipment 4, equipment 5, equipment 6, equipment 7 etc., including but not limited to：Base station, e-Node B or network controller etc..
To be described in detail as a example below using cell k as Target cell.
Fig. 2 is the flow chart for carrying out the method for interference coordination between the group of adjacent co-frequency cell of one aspect of the invention.
Specifically, in step S01, equipment k obtains the prioritized resources block domain information of other cells described and described adjacent
The total edge load information of co-frequency cell group.Wherein, prioritized resources block includes but is not limited to：1) preferential frequencies domain；2) when preferentially
Gap domain etc..For example, equipment k obtain cell 2 ... cell k-1, the prioritized resources block domain information of cell k+1...... cell K
And the total edge load information of described adjacent co-frequency cell group A.
Then, in step S02, equipment 7 is according to the prioritized resources block domain information of other cells described, and the side of cell 7
Edge load information to update the prioritized resources block domain of cell 7 with described total edge load information.
Fig. 3 is the flow process for carrying out the method for interference coordination between the group of adjacent co-frequency cell of another aspect of the invention
Figure.Wherein, in group A of adjacent co-frequency cell, whole resources, for example, and band resource or time interval resource, it is divided into N number of in advance
Physical Resource Block, that is, PRB0, PRB1 ... PRBN-1, PRB 0 is adjacent with PRB N-1, the prioritized resources that each cell takies
Block (HII) domain (i.e. HII is the domain of " 1 ") is as shown in Figure 4.
As a kind of optimal way, the equipment of cell k pre-builds and preserves the following information：
SelfStartPRBNo:The initial PRB value in the prioritized resources domain of this cell；
SelfPRBNo:The end PRB value in the prioritized resources domain of this cell；
StartPRBNo(m):In the up-to-date load instruction information of cell m, HII is " 1 " corresponding initial PRB value；
EndPRBNo(m):In the up-to-date load instruction information of cell m, HII is " 1 " corresponding end PRB value；
SelfCellEdgeLoad:The cell edge load information of this cell, can be by all Cell Edge User
Radio bearer (radio bearer) guarantee bit rate (guaranteed bit rate) plus and try to achieve；
ΔSelfCellEdgeLoad:The detection changing value of the cell edge load information of this cell；
TotalEdgeLoad:The total cell edge load information estimated value in all neighbor cells of this cell；
CellEdgeLoad(m):The cell edge load information estimated value of cell m.
Specifically, in step S011, the edge load that equipment k receives from other cells described indicates message.Wherein,
The bitmap (bitmap) of HII value is included but is not limited to, that is, every bit value represents the HII of a PRB in edge load configured information
Value, for " 0 " or " 1 ".
Then, in step S012, equipment k is indicated the edge extracting other cells described in message by described edge load
Load information.For example, equipment k by the load instruction information of cell m receiving extract edge load information include as follows
Information：
HIIStartNo:Corresponding HII value is the initial PRB value of " 1 "；
HIIEndNo:Corresponding HII value is the end PRB value of " 1 "；
HIISize:The number of the corresponding PRB for " 1 " for the HII value.
Then, in step S013, the edge load of the edge load information by cell k for the equipment k and other cells described
Change information is generating described total edge load information.For example, equipment k first estimates cell m according to the edge load information of cell m
Edge load information changing value：
Then, equipment k updates cell m edge load information estimated value again：
StartPRBNo(m)←HIIStartNo
EndPRBNo(m)←HIIEndNo
CellEdgeLoad(m)←ΔLoad(m)+CellEdgeLoad(m)
TotalEdgeLoad←ΔLoad(m)+TotalEdgeLoad.
So, when equipment k often obtains the edge load information of a neighbor cell, that is, according to the edge load based on cell m
The same mode of information is processed, and thus can obtain all neighbor cell total edge load information TotalEdgeLoad.
Then, in step S02, equipment k is according to the prioritized resources block domain information of other cells described, and Target cell
Edge load information and described total edge load information come the prioritized resources block domain of more new target cell.For example, equipment k is according to phase
The edge load information Δ SelfCellEdgeLoad of adjacent cell total edge load information TotalEdgeLoad and cell k calculates
And update the length in its preferential frequencies domain：
And then, equipment k can be according to the prioritized resources block of length Y in its required preferential frequencies domain and other cells described
Domain information is updating the prioritized resources domain of cell k：
SelfStartPRBNo←mod(StartPRBNo(k-1)+1,N)
SelfEndPRBNo←mod(StartPRBNo(k-1)+Y,N)
Wherein, SelfStartPRBNo is the initial value of the PRB in prioritized resources domain of cell k, is the prioritized resources of cell k
The end value of the PRB in domain, the end value of the PRB in the prioritized resources domain that StartPRBNo (k-1) takies for cell k-1.
Finally, in step S03, when conforming to a predetermined condition, equipment k will comprise the edge load information of described Target cell
Edge load configured information be supplied to other cells.Wherein, described predetermined condition includes but is not limited to：
1) receive the edge load configured information that the previous cell of arranged in sequence is sent out, for example, equipment k receives and is derived from
After the edge load configured information that cell k-1 is sent out, the edge load configured information of the edge load information of either own cell k is carried
Supply cell 1 ... cell k-1, cell k+1 ... cell K.
2) receive the configured information sending edge load configured information for instruction, for example, equipment k receives for referring to
Show the edge load configured information sending cell k when sending token (token) of edge load configured information.
It should be appreciated by those skilled in the art that described above all to be described in detail with cell k for Target cell, it is true that
Other cells, for example, cell 1, cell 2 .... cell k-1, cell k+1 ... when cell K is respectively as Target cell,
Accordingly each equipment carry out interference coordination between the group of adjacent co-frequency cell method and apparatus k identical, therefore here no longer repeats.
Fig. 5 is the equipment schematic diagram for carrying out interference coordination between the group of adjacent co-frequency cell of one aspect of the invention.If
Standby k includes：Acquisition device 11 and updating device 12.
Specifically, acquisition device 11 obtains the prioritized resources block domain information of other cells described and described adjacent co-frequency cell
The total edge load information of group.Wherein, prioritized resources block includes but is not limited to：1) preferential frequencies domain；2) priority slot domain etc..Example
As, acquisition device 11 acquisition cell 2 ... cell k-1, the prioritized resources block domain information of cell k+1...... cell K and institute
State the total edge load information of adjacent co-frequency cell group A.
Then, updating device 12 is according to the prioritized resources block domain information of other cells described, and the edge load letter of cell 7
Breath to update the prioritized resources block domain of cell 7 with described total edge load information.
Fig. 6 is the equipment schematic diagram for carrying out interference coordination between the group of adjacent co-frequency cell of another aspect of the invention.
Described equipment k includes：Acquisition device 11, updating device 12 and offer device 13.Wherein, acquisition device 11 includes：Reception device
111st, extraction element 112 and generating means 113.
Wherein, described equipment k be located adjacent co-frequency cell group A in, whole resources, for example, band resource or when
Gap resource, is divided into N number of Resource Block in advance, that is, PRB0, PRB1 ... PRBN-1, PRB 0 is adjacent with PRB N-1, Mei Yi little
Prioritized resources block (HII) domain (i.e. HII is the domain of " 1 ") that area takies is as shown in Figure 4.
As a kind of optimal way, the equipment k of cell k pre-builds and preserves the following information：
SelfStartPRBNo:The initial PRB value in the prioritized resources domain of this cell；
SelfPRBNo:The end PRB value in the prioritized resources domain of this cell；
StartPRBNo(m):In the up-to-date load instruction information of cell m, HII is " 1 " corresponding initial PRB value；
EndPRBNo(m):In the up-to-date load instruction information of cell m, HII is " 1 " corresponding end PRB value；
SelfCellEdgeLoad:The cell edge load information of this cell, can be by all Cell Edge User
Radio frequency carry the guarantee bit rate (guaranteed bit rate) of sub (radio bearer) plus and try to achieve；
ΔSelfCellEdgeLoad:The detection changing value of the cell edge load information of this cell；
TotalEdgeLoad:The total cell edge load information estimated value in all neighbor cells of this cell；
CellEdgeLoad(m):The cell edge load information estimated value of cell m.
Specifically, the edge load that reception device 111 receives from other cells described indicates message.Wherein, edge is born
Carry the bitmap (bitmap) of including but not limited to HII value in configured information, that is, every bit value represents the HII value of a PRB, for " 0 "
Or " 1 ".
Then, extraction element 112 is indicated the edge load letter extracting other cells described in message by described edge load
Breath.For example, extraction element 112 by the load instruction information of cell m receiving extract edge load information include as follows
Information：
HIIStartNo:Corresponding HII value is the initial PRB value of " 1 "；
HIIEndNo:Corresponding HII value is the end PRB value of " 1 "；
HIISize:The number of the corresponding PRB for " 1 " for the HII value.
Then, the edge load change information of the edge load information by cell k for the generating means 113 and other cells described
To generate described total edge load information.For example, generating means 113 first estimate cell m according to the edge load information of cell m
The changing value of edge load information：
Then, generating means 113 update cell m edge load information estimated value again：
StartPRBNo(m)←HIIStartNo
EndPRBNo(m)←HIIEndNo
CellEdgeLoad(m)←ΔLoad(m)+CellEdgeLoad(m)
TotalEdgeLoad←ΔLoad(m)+TotalEdgeLoad.
So, when extraction element 112 often extracts the edge load information of a neighbor cell, generating means 113 are i.e. according to base
Processed in the same mode of the edge load information of cell m, thus can be obtained all neighbor cells total edge load letter
Breath TotalEdgeLoad.
Then, updating device 12 is according to the prioritized resources block domain information of other cells described, and the edge of Target cell is born
Information carrying breath and described total edge load information come the prioritized resources block domain of more new target cell.For example, updating device 12 is according to phase
The edge load information Δ SelfCellEdgeLoad of adjacent cell total edge load information TotalEdgeLoad and cell k calculates
And update the length in its preferential frequencies domain：
And then, updating device 12 can be preferential according to length Y in its required preferential frequencies domain and other cells described
Resource-block domain information is updating the prioritized resources domain of cell k：
SelfStartPRBNo←mod(StartPRBNo(k-1)+1,N)
SelfEndPRBNo←mod(StartPRBNo(k-1)+Y,N)
Wherein, SelfStartPRBNo is the initial value of the PRB in prioritized resources domain of cell k, is the prioritized resources of cell k
The end value of the PRB in domain, the end value of the PRB in the prioritized resources domain that StartPRBNo (k-1) takies for cell k-1.
Finally, when conforming to a predetermined condition, offer device 13 will comprise the edge of the edge load information of described Target cell
Load instruction information is supplied to other cells.Wherein, described predetermined condition includes but is not limited to：
1) receive the edge load configured information that the previous cell of arranged in sequence is sent out, for example, reception device 111 receives
To after the edge load configured information that cell k-1 is sent out, offer device 13 is by the side of the edge load information of either own cell k
Edge load instruction information be supplied to cell 1 ... cell k-1, cell k+1 ... cell K.
2) receive the configured information sending edge load configured information for instruction, for example, equipment k receives for referring to
Show send edge load configured information token (token) when, offer device 13 send cell k edge load configured information.
It should be appreciated by those skilled in the art that described above all to be described in detail with cell k for Target cell, it is true that
Other cells, for example, cell 1, cell 2 .... cell k-1, cell k+1 ... when cell K is respectively as Target cell,
Accordingly the structure and working principle of each equipment is identical with equipment k, therefore here no longer repeats.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of the spirit or essential attributes of the present invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as limiting involved claim.This
Outward it is clear that " inclusion " one word is not excluded for other units or step, odd number is not excluded for plural number.In system claims, statement is multiple
Unit or device can also be realized by software or hardware by a unit or device.The first, the second grade word is used for table
Show title, and be not offered as any specific order.
Claims (10)
1. a kind of method in wireless communication system for carrying out interference coordination between the group of adjacent co-frequency cell, wherein, described phase
Adjacent co-frequency cell group includes Target cell and other cells adjacent thereto, and the method comprises the following steps：
A obtains the described prioritized resources block domain information of other cells and the total edge load information of described adjacent co-frequency cell group；
B is according to the prioritized resources block domain information of other cells described, and the edge load information of Target cell and described total edge
Load information comes the prioritized resources block domain of more new target cell；
Wherein, described edge load information includes the bitmap of HII value,
Described step b includes：
- according to below equation calculate update after described Target cell prioritized resources block domain lengthWherein SelfCellEdgeLoad represents that the edge of described Target cell is born
Information carrying ceases, and TotalEdgeLoad represents described total edge load information, and Δ SelfCellEdgeLoad represents described Target cell
Cell edge load information detection changing value, N represents total number of resource blocks of described adjacent co-frequency cell group, and,
- determine that the prioritized resources block domain behind the prioritized resources block domain after its renewal, and described renewal has for described Target cell
Determined by length.
2. method according to claim 1, wherein, described step a also includes：
- receive the edge load instruction message being derived from other cells described；
- by the edge load information extracting other cells described in described edge load instruction message；
- described total edge load is generated by the edge load information of Target cell and the edge load information of other cells described
Information.
3. method according to claim 1 and 2, wherein, also includes：
I, when conforming to a predetermined condition, the edge load configured information of the edge load information comprising described Target cell is supplied to
Other cells.
4. method according to claim 3, wherein, described predetermined condition includes：
- receive the edge load configured information that the previous cell of arranged in sequence is sent out；
- receive the configured information sending edge load configured information for instruction.
5. method according to claim 1, wherein, described wireless communication system includes LTE, WiMAX system.
6. a kind of in wireless communication system for carrying out the equipment of interference coordination between the group of adjacent co-frequency cell, wherein, described phase
Adjacent co-frequency cell group includes Target cell and other cells adjacent thereto, and wherein, this equipment includes：
Acquisition device, for obtaining the described prioritized resources block domain information of other cells and total side of described adjacent co-frequency cell group
Edge load information；
Updating device, for the prioritized resources block domain information according to other cells described, and the edge load information of Target cell
Come the prioritized resources block domain of more new target cell with described total edge load information；
Wherein, described edge load information includes the bitmap of HII value,
Described updating device is configured to execute following operation：
- according to below equation calculate update after described Target cell prioritized resources block domain lengthWherein SelfCellEdgeLoad represents that the edge of described Target cell is born
Information carrying ceases, and TotalEdgeLoad represents described total edge load information, and Δ SelfCellEdgeLoad represents described Target cell
Cell edge load information detection changing value, N represents total number of resource blocks of described adjacent co-frequency cell group, and,
- determine that the prioritized resources block domain behind the prioritized resources block domain after its renewal, and described renewal has for described Target cell
Determined by length.
7. equipment according to claim 6, wherein, described acquisition device also includes：
Reception device, the edge load for receiving from other cells described indicates message；
Extraction element, for being indicated the edge load information extracting other cells described in message by described edge load；
Generating means, for generate institute by the edge load information of Target cell and the edge load information of other cells described
State total edge load information.
8. the equipment according to claim 6 or 7, wherein, also includes：
Offer device, for when conforming to a predetermined condition, the edge load of the edge load information comprising described Target cell being referred to
Show that information is supplied to other cells.
9. equipment according to claim 8, wherein, described predetermined condition includes：
- receive the edge load configured information that the previous cell of arranged in sequence is sent out；
- receive the configured information sending edge load configured information for instruction.
10. equipment according to claim 6, wherein, described wireless communication system includes LTE, WiMAX system, described sets
The standby base station including described Target cell or NodeB, network controller.
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| WO2014161179A1 (en) * | 2013-04-03 | 2014-10-09 | 华为技术有限公司 | Configuration management method and apparatus for heterogeneous network cell, and network management device |
| CN107787045B (en) * | 2016-08-31 | 2020-04-28 | 中国电信股份有限公司 | Inter-cell interference coordination method and system |
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| CN101064905A (en) * | 2006-04-28 | 2007-10-31 | 华为技术有限公司 | Wireless system frequency resources distribution method, equipment and wireless communication system |
| CN101860912A (en) * | 2009-04-09 | 2010-10-13 | 大唐移动通信设备有限公司 | Resource allocation method, device and system |
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| CN101472339B (en) * | 2007-12-25 | 2010-12-08 | 华为技术有限公司 | Method for coordinating district interference |
| CN101494895B (en) * | 2008-01-22 | 2010-12-08 | 中兴通讯股份有限公司 | Method and system for coordinating interference between districts |
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| CN101860912A (en) * | 2009-04-09 | 2010-10-13 | 大唐移动通信设备有限公司 | Resource allocation method, device and system |
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