CN107295528A - Co-channel interference protection band division methods, device and system - Google Patents
Co-channel interference protection band division methods, device and system Download PDFInfo
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- CN107295528A CN107295528A CN201610195993.1A CN201610195993A CN107295528A CN 107295528 A CN107295528 A CN 107295528A CN 201610195993 A CN201610195993 A CN 201610195993A CN 107295528 A CN107295528 A CN 107295528A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000001228 spectrum Methods 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 abstract description 3
- 238000004590 computer program Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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Abstract
The invention discloses a kind of co-channel interference protection band division methods, device and system, it is related to wireless communication field.Co-channel interference protection band division methods therein include:Some base stations are divided into and backsets origin base station and non-backsets origin base station;The non-base station that has co-channel interference with backsetting origin base station in origin base station of backsetting is defined as co-channel interference base station;The base station that is more than handoff threshold with the handoff relation of co-channel interference base station in origin base station will be backsetted and be defined as the co-channel interference protection band base station that can not be backsetted.The present invention backsets origin base station and non-backsets origin base station by dividing; and from it is non-backset origin base station in determine and backset origin base station and have the base station of co-channel interference; then the base station that can not be backsetted is determined from origin base station is backsetted according to the handover information for backsetting origin base station and co-channel interference base station; and co-channel interference protection band base station is set; the co-channel interference produced during frequency spectrum resource is backsetted can be alleviated, network quality and Consumer's Experience has been ensured.
Description
Technical field
The present invention relates to wireless communication field, more particularly to a kind of co-channel interference protection band division side
Method, device and system.
Background technology
The frequency resource of mobile network is more and more nervous, especially below 1GHz Frequency
Resource, it is difficult to obtain more frequency resource deployment New Generation Mobile Communication Networks to cause operator.
Therefore carry out network in low-frequency range to backset, that is, disposing New Generation Mobile Communication Network turns into operator
The inevitable choice of e-learning quality.However, existing 2G/3G business will be by a transitional period
4G networks can be just moved to, therefore for the nervous city of low-frequency range frequency spectrum resource, operator
4G networks are disposed in high band;For the rural area that low-frequency range frequency spectrum resource is sufficient, operator exists
Low-frequency range disposes 4G networks, realizes the wide covering of 4G networks.
However, may result in the 2G/3G networks of city low-frequency range deployment using such scheme
The 4G networks disposed with rural area low-frequency range are produced into co-channel interference, cause 2G/3G user's
Complain, influence 4G network capacities.
The content of the invention
A technical problem to be solved by this invention is:Alleviate during frequency spectrum resource is backsetted and produce
Co-channel interference.
One side according to embodiments of the present invention is divided there is provided a kind of co-channel interference protection band
Method, including:Some base stations are divided into and backsets origin base station and non-backsets origin base station;Will
The non-base station for having co-channel interference with backsetting origin base station in origin base station of backsetting is defined as co-channel interference
Base station;The handoff relation backsetted in origin base station with co-channel interference base station is more than handoff threshold
Base station is defined as the co-channel interference protection band base station that can not be backsetted.
In one embodiment, non-backset in origin base station with backsetting origin base station is had dry with frequency
The base station disturbed, which is defined as co-channel interference base station, to be included:Obtain the carrier configuration information of some base stations;
According to the carrier configuration information of some base stations, backsetted non-in origin base station with backsetting origin base station
Base station with identical frequency is defined as co-channel interference base station.
In one embodiment, obtaining the carrier configuration information of some base stations includes:Pass through webmaster
System interface obtains the carrier configuration information of some base stations from the data of network management system.
In one embodiment, the handoff relation in origin base station with co-channel interference base station will be backsetted
The co-channel interference protection band base station for being defined as backsetting more than the base station of handoff threshold includes:Obtain
Take the switch data of some base stations;According to the switch data of some base stations, region base is backsetted in acquisition
The switching times stood with co-channel interference base station on same frequency, with cutting for co-channel interference base station
Change backset co-channel interference protection that origin base station be defined as can not backset of the number of times more than handoff threshold
Band base station.
In one embodiment, obtaining the switch data of some base stations includes:Pass through network management system
Interface obtains switch data of some base stations on the frequency disposed from the data of network management system.
In one embodiment, some base stations are divided into and backset origin base station and non-backset region
Base station includes:Frequency spectrum resource configuration information in base station, which is divided, backsets origin base station and non-heavy
Plough origin base station.
In one embodiment, handoff threshold is set according to the acceptable annoyance level of network.
Second aspect according to embodiments of the present invention is divided there is provided a kind of co-channel interference protection band and filled
Put, it is characterised in that including:Region division module, is backsetted for some base stations to be divided into
Origin base station and non-backset origin base station;Co-channel interference base station determining module, for being backsetted non-
The base station for having co-channel interference with backsetting origin base station in origin base station is defined as co-channel interference base station;
Co-channel interference protection band determining module, for will backset in origin base station with co-channel interference base station
The base station that handoff relation is more than handoff threshold is defined as the co-channel interference protection band base station that can not be backsetted.
In one embodiment, co-channel interference base station determining module includes:Carrier configuration information is obtained
Unit is taken, the carrier configuration information for obtaining some base stations;Co-channel interference base station determining unit,
For the carrier configuration information according to some base stations, backsetted non-in origin base station with backsetting region
There is the base station of identical frequency to be defined as co-channel interference base station for base station.
In one embodiment, carrier configuration information acquiring unit is used to pass through network management system interface
The carrier configuration information of some base stations is obtained from the data of network management system.
In one embodiment, co-channel interference protection band determining module includes:Switch data is obtained
Unit, the switch data for obtaining some base stations;Co-channel interference protection band determining unit, is used
In the switch data according to some base stations, acquisition is backsetted origin base station and is located at co-channel interference base station
Switching times on same frequency, are more than handoff threshold with the switching times of co-channel interference base station
Backset the co-channel interference protection band base station that origin base station is defined as backsetting.
In one embodiment, switch data acquiring unit is used to pass through network management system interface from net
Switch data of some base stations on the frequency disposed is obtained in the data of guard system.
In one embodiment, the frequency spectrum resource configuration that region division module is used in base station
Information, which is divided, backsets origin base station and non-backsets origin base station.
In one embodiment, handoff threshold is set according to the acceptable annoyance level of network.
3rd aspect according to embodiments of the present invention is divided there is provided a kind of co-channel interference protection band
System, it is characterised in that including:Foregoing any one co-channel interference protection band divide device and
Network management system, network management system is matched somebody with somebody for providing carrier wave for co-channel interference protection band division device
Confidence ceases the switch data between base station.
The present invention by divide backset origin base station and it is non-backset origin base station, and backset region from non-
Origin base station is determined and backsetted in base station the base station of co-channel interference, and then basis backsets region base
Stand and the handover information of co-channel interference base station determine the base station that can not be backsetted from origin base station is backsetted,
And co-channel interference protection band base station is set, the same frequency produced during frequency spectrum resource is backsetted can be alleviated
Interference, has ensured network quality and Consumer's Experience.
By referring to the drawings to the detailed description of exemplary embodiment of the invention, the present invention
Further feature and its advantage will be made apparent from.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will
The required accompanying drawing used in embodiment or description of the prior art is briefly described, it is clear that
Ground, drawings in the following description are only some embodiments of the present invention, for the common skill in this area
For art personnel, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings
Other accompanying drawings.
Fig. 1 is the flow chart of one embodiment of co-channel interference protection band division methods of the present invention.
Fig. 2 is the structure chart of one embodiment of co-channel interference protection band dividing system of the present invention.
Fig. 3 is the structure chart of one embodiment that co-channel interference protection band of the present invention divides device.
Fig. 4 is the structure chart for another embodiment that co-channel interference protection band of the present invention divides device.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, to the technical scheme in the embodiment of the present invention
It is clearly and completely described, it is clear that described embodiment is only that a part of the invention is real
Apply example, rather than whole embodiments.Description below at least one exemplary embodiment is real
It is merely illustrative on border, never as to the present invention and its application or any limitation used.
Based on the embodiment in the present invention, those of ordinary skill in the art are not before creative work is made
The every other embodiment obtained is put, the scope of protection of the invention is belonged to.
In the present invention, the frequency spectrum resource for having disposed certain standard network in existing network is disposed another again
The network of standard is planted, this process is exactly that frequency spectrum resource backsets process, referred to as " backsetting ".For example,
In the case where 872MHz has deployed 2G or 3G network, 4G nets are disposed in 872MHz
The process of network is to backset.However, the present invention is not only limited in 2G/3G networks to 4G networks
Backset, as needed, the network that can be used for other standards is backsetted.
In order to alleviate the co-channel interference produced during frequency spectrum resource is backsetted, the present invention is proposed.
Fig. 1 is the flow chart of one embodiment of co-channel interference protection band division methods of the present invention.Such as
Shown in Fig. 1, the method for the embodiment includes:
Step S102, some base stations are divided into and backsets origin base station and non-backsets origin base station.
Division backset origin base station and it is non-backset origin base station when, base station distribution feelings can be based on
Frequency spectrum resource configuring condition in condition, base station etc. is divided.For example, the low-frequency resources in rural area
It is more sufficient, it may be considered that it is backsetted, using the base station of rural areas as backsetting region
Base station, origin base station is backsetted using the base station of urban area as non-.
Step S104, has the base of co-channel interference by non-backset in origin base station with backsetting origin base station
Station is defined as co-channel interference base station.
In mobile communication system, in order to improve frequency efficiency, the capacity of system is increased, often
Frequently with channeling technology, i.e., after separated by a distance, in given overlay area,
Many cells using same class frequency are there are, these cells are referred to as co-frequency cell.It is small with frequency
Interference between area is referred to as the carrier frequency of co-channel interference, i.e. garbage signal and the carrier frequency phase of useful signal
Together, and to the receiver for receiving same frequency useful signal the interference caused.
It is determined that during co-channel interference base station, such as the carrier configuration information of associated base stations can be obtained,
Further according to the carrier configuration information of these base stations, backsetted non-in origin base station with backsetting region base
The base station that standing has identical frequency is defined as co-channel interference base station.
Wherein it is possible to obtain some base stations from the data of network management system by network management system interface
Carrier configuration information.Network management system is stored with the configuration information and switch data of magnanimity, can be with
Various information is comprehensively collected and provided, is easy to unified management.
Step S106, will backset with the handoff relation of co-channel interference base station to be more than in origin base station and cuts
The base station for changing thresholding is defined as the co-channel interference protection band base station that can not be backsetted.
Wherein, handoff relation can be the switching times between base station.It is for instance possible to use following
Method determines co-channel interference protection band:First, the switch data of some base stations is obtained;Then,
According to the switch data of some base stations, acquisition is backsetted origin base station and is located at together with co-channel interference base station
Switching times on one frequency, the origin base station of backsetting that switching times are more than handoff threshold is defined as
The co-channel interference protection band base station that can not be backsetted.Switching times more can intuitively reflect base station
Between handoff relation, so as to reflect the usage experience of user.
For example, f1 the and f2 frequencies of A base stations deploy 3G network, B only has f1 in base station
Frequency deploys 3G network, and the corresponding frequency spectrum resource of f2 frequencies of B base stations is in idle condition.
A base stations for be divided into it is non-backset origin base station, origin base station is backsetted in B base stations to be divided into,
Now it is intended to the f2 frequencies in B base stations and disposes 4G networks.B for example can be determined using following methods
Whether base station is the co-channel interference protection band base station that can not be backsetted:First, A base stations and B are obtained
Switch data between base station;Then, A base stations are obtained from switch data with B base stations double
Switching times on the f1 frequencies of Fang Junyi deployment;Finally, judge whether the switching times are more than
Default handoff threshold, if switching times of the A base stations with B base stations on f1 frequencies do not surpass
Handoff threshold is crossed, B base stations can be backsetted, you can to dispose 4G in the f2 frequencies of B base stations
Network;If A base stations are more than handoff threshold, B with switching times of the B base stations on f1 frequencies
Base station is the co-channel interference protection band base station that can not be backsetted, if the f2 frequencies in B base stations are disposed
After 4G, co-channel interference is relatively taken, it may appear that A base stations and switching of the B base stations on f2 frequencies
Number of times is more than the situation of handoff threshold, so as to cause the complaint of user, influences network capacity.
This method reflects these by the handoff relation between each base station on the f1 frequencies disposed
Handoff relation between base station on f2 frequencies to be backsetted, so that only need to matching somebody with somebody using existing network base station
Put and dispose the co-channel interference protection band base station that can determine that and can not backset.
In the above-described embodiments, it can be obtained by network management system interface from the data of network management system
Take switch data of some base stations on the frequency disposed.Because network management system is uniformly stored
Substantial amounts of, comprehensive switch data, without extra deployment test equipment, you can obtain base
Handoff relation between standing.Wherein, the switch data of acquisition can be whole switch datas,
It can be the switch data in certain a period of time.
Wherein, handoff threshold can be set according to the acceptable annoyance level of network.For example,
Requirement of some networks to communication quality is more strict, then handoff threshold can be reduced correspondingly.
By divide backset origin base station and it is non-backset origin base station, and backset origin base station from non-
It is determined that having the base station of co-channel interference with backsetting origin base station, then basis backsets origin base station and same
The handover information of frequency interference base station determines the base station that can not be backsetted from origin base station is backsetted, and sets
Co-channel interference protection band base station is put, the co-channel interference produced during frequency spectrum resource is backsetted can be alleviated,
Network quality and Consumer's Experience have been ensured, new interference will not be introduced to existing network, it is newly-built to backsetting
Network will not produce interference.
The co-channel interference protection band dividing system of one embodiment of the invention is described below with reference to Fig. 2.
Fig. 2 is the structure chart of one embodiment of co-channel interference protection band dividing system of the present invention.
As shown in Fig. 2 the co-channel interference protection band dividing system of the embodiment includes:Co-channel interference is protected
Protecting band divides device 22 and network management system 24.
Device is divided below with reference to Fig. 3 co-channel interference protection bands for describing one embodiment of the invention.
Fig. 3 is the structure chart of one embodiment that co-channel interference protection band of the present invention divides device.Such as
Shown in Fig. 2, the co-channel interference protection band of the embodiment, which divides device 22, to be included:Region division mould
Block 322, backsets origin base station and non-backsets origin base station for some base stations to be divided into;Together
Frequency interference base station determining module 324, for being backsetted non-in origin base station with backsetting origin base station
The base station for having co-channel interference is defined as co-channel interference base station;Co-channel interference protection band determining module
326, for the handoff relation backsetted in origin base station with co-channel interference base station to be more than into handoff threshold
Base station be defined as the co-channel interference protection band base station that can not be backsetted.
Wherein, the frequency spectrum resource that region division module 322 can be used in base station matches somebody with somebody confidence
Breath division backsets origin base station and non-backsets origin base station.
By divide backset origin base station and it is non-backset origin base station, and backset origin base station from non-
It is determined that having the base station of co-channel interference with backsetting origin base station, then basis backsets origin base station and same
The handover information of frequency interference base station determines the base station that can not be backsetted from origin base station is backsetted, and sets
Co-channel interference protection band base station is put, the co-channel interference produced during frequency spectrum resource is backsetted can be alleviated,
Network quality and Consumer's Experience have been ensured, new interference will not be introduced to existing network, it is newly-built to backsetting
Network will not produce interference.
Dress is divided below with reference to Fig. 4 co-channel interference protection bands for describing another embodiment of the present invention
Put.
Fig. 4 is the structure chart for another embodiment that co-channel interference protection band of the present invention divides device.
As shown in figure 4, the co-channel interference base station determining module 324 of the embodiment includes:Carrier wave is configured
Information acquisition unit 4242, the carrier configuration information for obtaining some base stations;Co-channel interference base
Determining unit of standing 4244, for the carrier configuration information according to some base stations, region is backsetted by non-
With backsetting origin base station there is the base station of identical frequency to be defined as co-channel interference base station in base station.
Wherein, carrier configuration information acquiring unit 4242 can be used for by network management system interface from
The carrier configuration information of some base stations is obtained in the data of network management system 24.Co-channel interference base station is true
Order member 4244 matches somebody with somebody confidence by the carrier wave obtained according to carrier configuration information acquiring unit 4242
Breath determines co-channel interference base station, easily can ask non-backset in region in the absence of co-channel interference
The base station of topic is filtered, and improves the treatment effeciency of subsequent operation.
Wherein, co-channel interference protection band determining module 326 can include:Switch data obtains single
Member 4262, the switch data for obtaining some base stations;Co-channel interference protection band determining unit
4264, for the switch data according to some base stations, origin base station and co-channel interference are backsetted in acquisition
Base station is located at the switching times on same frequency, is more than with the switching times of co-channel interference base station and cuts
Change the co-channel interference protection band base station that origin base station is defined as backsetting of backsetting of thresholding.
Wherein, switch data acquiring unit 4262 can be used for by network management system interface from webmaster
Switch data of some base stations on the frequency disposed is obtained in the data of system 24.Due to net
Guard system uniformly stores substantial amounts of, comprehensive switch data, without extra deployment test
Equipment, you can obtain the handoff relation between base station.
Wherein, handoff threshold is set according to the acceptable annoyance level of network.
One application example in, co-channel interference protection band divide device 22 by network management interface from
The network management system 24 of existing network extracts carrier configuration information and the one section of week of these base stations of all base stations
The switch data of phase (such as one week);Then base station is grouped, i.e. M groups are (non-to backset region
Base station) and N groups (backsetting origin base station);M groups base station is divided into two subgroups by continuation,
I.e. I groups (having the base station of co-channel interference with backsetting network) and L groups are (with backsetting network without with frequency
The base station of interference);The neighboring BS relationship of all base stations of I groups and all base stations of N groups is analyzed, if base
Handoff relation in Nn (some base station i.e. in N groups) and the I groups of standing between any base station is big
In default handoff threshold γ, then base station Nn incorporates B groups into, and B groups base station can not be backsetted
Interference protection band base station;If the handoff relation between all base stations of Nn and I group of base station is both less than
Or equal to handoff threshold γ, then base station Nn incorporates A groups into, A groups base station is can backset base station.
In addition, the method according to the invention is also implemented as a kind of computer program product, should
Computer program product includes computer-readable medium, is stored with the computer-readable medium
The computer program of the above-mentioned functions limited in method for performing the present invention.Art technology
Personnel will also understand is that, the various illustrative logical blocks with reference to described by disclosure herein, mould
Block, circuit and algorithm steps may be implemented as the group of electronic hardware, computer software or both
Close.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all at this
Within the spirit and principle of invention, any modification, equivalent substitution and improvements made etc. all should be wrapped
It is contained within protection scope of the present invention.
Claims (15)
1. a kind of co-channel interference protection band division methods, it is characterised in that including:
Some base stations are divided into and backsets origin base station and non-backsets origin base station;
Non- backset in origin base station with the origin base station of backsetting there is into the base station of co-channel interference
It is defined as co-channel interference base station;
The handoff relation backsetted in origin base station with the co-channel interference base station is more than switching
The base station of thresholding is defined as the co-channel interference protection band base station that can not be backsetted.
2. according to the method described in claim 1, it is characterised in that it is described will be described non-heavy
Plough in origin base station and to be defined as co-channel interference with the base station backsetted origin base station and have co-channel interference
Base station includes:
Obtain the carrier configuration information of some base stations;
According to the carrier configuration information of some base stations, by it is described it is non-backset in origin base station with
There is the origin base station of backsetting the base station of identical frequency to be defined as co-channel interference base station.
3. method according to claim 2, it is characterised in that if described in the acquisition
The carrier configuration information at butt station includes:
The carrier wave of some base stations is obtained from the data of network management system by network management system interface
Configuration information.
4. according to the method described in claim 1, it is characterised in that described to be backsetted described
The base station for being more than handoff threshold with the handoff relation of the co-channel interference base station in origin base station is determined
Include for the co-channel interference protection band base station that can not backset:
Obtain the switch data of some base stations;
According to the switch data of some base stations, origin base station is backsetted described in acquisition and described same
Frequency interference base station is located at the switching times on same frequency, the switching with the co-channel interference base station
Number of times backsets the co-channel interference protection band that origin base station is defined as backsetting more than handoff threshold
Base station.
5. method according to claim 4, it is characterised in that if described in the acquisition
The switch data at butt station includes:
Some base stations are obtained in portion from the data of network management system by network management system interface
Switch data on the frequency of administration.
6. according to the method described in claim 1, it is characterised in that described by some base stations
It is divided into and backsets origin base station and non-origin base station of backsetting and include:
Frequency spectrum resource configuration information in base station, which is divided, to be backsetted origin base station and non-backsets region
Base station.
7. according to the method described in claim 1, it is characterised in that the handoff threshold root
Set according to the acceptable annoyance level of network.
8. a kind of co-channel interference protection band divides device, it is characterised in that including:
Region division module, backsets origin base station and non-backsets area for some base stations to be divided into
Domain base station;
Co-channel interference base station determining module, for by it is described it is non-backset in origin base station with it is described heavy
The base station that cultivated origin base station has co-channel interference is defined as co-channel interference base station;
Co-channel interference protection band determining module, for by it is described backset in origin base station with it is described same
The same frequency that the base station that the handoff relation of frequency interference base station is more than handoff threshold is defined as backsetting is done
Disturb protection band base station.
9. device according to claim 8, it is characterised in that the co-channel interference base
Determining module of standing includes:
Carrier configuration information acquiring unit, the carrier configuration information for obtaining some base stations;
Co-channel interference base station determining unit, for the carrier configuration information according to some base stations,
Have the base station of identical frequency true non-backset in origin base station with the origin base station of backsetting
It is set to co-channel interference base station.
10. device according to claim 9, it is characterised in that the carrier wave matches somebody with somebody confidence
Breath acquiring unit is used to obtain described some from the data of network management system by network management system interface
The carrier configuration information of base station.
11. device according to claim 8, it is characterised in that the co-channel interference is protected
Protecting band determining module includes:
Switch data acquiring unit, the switch data for obtaining some base stations;
Co-channel interference protection band determining unit, for the switch data according to some base stations,
The switching time that origin base station is located at the co-channel interference base station on same frequency is backsetted described in obtaining
Number, with the switching times of the co-channel interference base station be more than handoff threshold to backset origin base station true
It is set to the co-channel interference protection band base station that can not be backsetted.
12. device according to claim 11, it is characterised in that the switch data is obtained
Unit is taken to be used to obtain some base stations from the data of network management system by network management system interface
Switch data on the frequency disposed.
13. device according to claim 8, it is characterised in that the region division mould
Block is used to frequency spectrum resource configuration information in base station and divided backset origin base station and non-backset area
Domain base station.
14. device according to claim 8, it is characterised in that the handoff threshold root
Set according to the acceptable annoyance level of network.
15. a kind of co-channel interference protection band dividing system, it is characterised in that including:
Co-channel interference protection band any one of claim 8-14 divides device,
With, network management system, carrier wave is provided for dividing device for the co-channel interference protection band and is matched somebody with somebody
Confidence ceases the switch data between base station.
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