CN105898758A - Interference coordination method based on interference protection area - Google Patents
Interference coordination method based on interference protection area Download PDFInfo
- Publication number
- CN105898758A CN105898758A CN201610325207.5A CN201610325207A CN105898758A CN 105898758 A CN105898758 A CN 105898758A CN 201610325207 A CN201610325207 A CN 201610325207A CN 105898758 A CN105898758 A CN 105898758A
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- China
- Prior art keywords
- base station
- interference
- user
- interference protection
- radio resources
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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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
Abstract
The invention discloses an interference coordination method based on an interference protection area. The method comprises the steps of: 1, calculating interference protection radiuses r0 of users needing base station services according to the fact that a user coverage probability P is greater than a threshold value [beta]; 2, taking the users as centers, and taking circular areas in which the interference protection radiuses are taken as radiuses as interference protection areas of the users; and 3, marking an available wireless resource set of a macro base station and all small-sized base stations as [omega], and marking wireless resources already occupied by the base stations inside the interference protection area of a current user as [R], wherein [R] is a proper subset of [omega], and the available wireless resources of the current user can only be selected from a wireless resource set [omega]\R, namely, the small-sized base stations inside the interference protection area of the current user cannot share the wireless resources with a master service base station of the current user. Through adoption of the interference coordination method, same frequency interference can be suppressed effectively; the spectrum utilization ratio is increased; the system coverage probability is increased; and the performance of the users is improved at the same time.
Description
Technical field
The present invention relates to communication technical field, particularly to a kind of wireless isomorphism or the interference synergic method of heterogeneous network.
Its multiple access technique can be frequency division multiple access (Frequency Division Multiple Access:FDMA), orthogonal frequency
Divide the multiple access technologies such as multiple access (Orthogonal Frequency Division Multiple Access:OFDMA).
Background technology
In recent years, mobile communications industry is faced with the opportunity significantly developed, and forth generation (4G) system is in the world
Gradually obtaining commercialization, the 5th generation (5G) mobile communication technology also obtains each research tissue, mobile communication carrier, International standardization
The attention of tissue.From the point of view of the vision of working bound pair 5G, 5G will have the availability of frequency spectrum and the efficiency of superelevation, in transfer rate and money
The aspect relatively 4G mobile communication such as source utilization rate improve a magnitude or higher, its wireless coverage performance, propagation delay time, security of system
Also will be significantly improved with Consumer's Experience.In order to realize vision and the target of 5G, 5G, in terms of wireless network, will use more
Flexibly, the more intelligent network architecture and networking technology.Wherein, on the basis of original macrocellular, various dissimilar base station is increased
Super-intensive heterogeneous network, can effectively improve network capacity, increase system covering measures, have become as future mobile communications
One of developing direction of SNA.In intensive heterogeneous network, the densification of network makes network node from terminal more
Closely, the lifting of power efficiency and spectrum efficiency is brought.But, the mode of this shared frequency spectrum causes each node with covering
Between interference problem, especially macro base station is to the interference of user's downlink reception in small base station, and the big merit in macro base station edge
The rate terminal use interference to neighbouring small base station.How to solve the performance damage that these interference bring, be that needs go deep into
The major issue of research.Interference synergic is one of effective measures of suppression interference.
Therefore, in the present invention, a kind of interference synergic method of customer-centric is proposed.
Summary of the invention
It is an object of the invention to propose a kind of interference synergic method based on interference protection region, wherein carry out interference association
Same Radio Resource includes: the one or more dimensions Radio Resources such as frequency, time slot, space.The method can be according to residing for user
Communication environment, dynamic suppression Radio Resource shares the interference problem brought.
The technical solution adopted for the present invention to solve the technical problems comprises the steps:
Step 1, each is needed the user that base station services, calculate use according to user covering measures P more than threshold value
The interference protection radius r at family0,
r0=y-1(β)；Formula (1)
Wherein: PmAnd PfBe respectively macro base station launches power and the transmitting power of small base station, r1Service with it for user
Macro base station between distance, λ is the density of small base station of interference, σ2For noise power, T is Signal to Interference plus Noise Ratio thresholding, and β is for being
The covering measures threshold value that system requires；θ is small base station path loss index；α is macro base station path loss index；
Step 2, customer-centric, interference protection radius is the interference protection region that border circular areas is user of radius；
Step 3, the usable radio resources set of macro base station and all small base stations is designated as Ω, if active user's interference
The Radio Resource that base station within protection zone has taken is designated as R, wherein,Then the usable radio resources of active user is only
Can from set of radio resources Ω R chooses.If the Radio Resource that active user has taken is designated as S, wherein,Then when
The usable radio resources of the base station of front user's interference protection intra-zone can only from set of radio resources Ω S chooses.I.e. current
The small base station of the interference protection intra-zone of user can not share Radio Resource with active user.
Noise power σ described in step 12, in interference-limited system, take 0.
Described small-sized base station can also be macro base station.
The present invention has the beneficial effect that:
Base station type, transmitting power in the present invention can be the same or different, and the coverage of base station can be to appoint
The area of coverage of what shape, including cellular cell.Further, threshold T, the covering measures of system requires that β can be actual according to system
Demand determines, the threshold value of each user can be the same or different.
The present invention can effectively suppress co-channel interference, improves the availability of frequency spectrum, improves system covering measures；Improve use simultaneously
The performance at family.
Accompanying drawing explanation
Fig. 1 is one embodiment of the invention.
The concrete system model for macro base station-Home eNodeB two-tier network, has 1 macro base station and several random in figure
The Home eNodeB of distribution, black soft dot represents Home eNodeB, and two gray areas represent grand user 1 and grand user 2 respectively
Interference protection region.
Detailed description of the invention
According to the basic conception of the present invention, when for user's distributing radio resource, it is first determined the interference protection district of user
Territory, then finds out the base station in interference protection region, allows these base station cooperative transmissions to suppress co-channel interference.According to the present invention
A kind of based on interference protection region interference synergic method, specifically comprise the following steps that
Step 1: each is needed the user that base station services, calculates use according to user covering measures P more than threshold value
The interference protection radius r at family0, i.e. P (SINR ＞ T) ＞ β calculating user meets the interference protection region half that covering measures requires
Footpath r0, wherein SINR is by the transmitting power P of user's serving BSm, user and distance r of its serving BS1, interference base station close
Degree and the transmitting power decision of interference base station.
r0=y-1(β)；Formula (1)
Wherein: PmAnd PfBe respectively macro base station launches power and the transmitting power of small base station, r1Service with it for user
Macro base station between distance, λ is the density of small base station of interference, σ2For noise power, T is Signal to Interference plus Noise Ratio thresholding, and β is for being
The covering measures threshold value that system requires.θFor small base station path loss index；αFor macro base station path loss index；
Step 2: customer-centric, r0The interference protection region of user is obtained for radius.Wherein, interference protection region by
The Signal to Interference plus Noise Ratio thresholding T of system, the covering measures of system requires the transmitting power P of the serving BS of β, userm, user takes with it
Distance r of business base station1, the density of interference base station and the transmitting power of interference base station comprehensively determine.
Step 3: serving BS be user distribute Ω Radio Resource in R.
Needing explanation: when having only to be allocated frequency resource, the present invention is exactly a kind of dynamic frequency distribution side
Case, Ω and R is reduced to frequency sets.When having only to plan time slot, the present invention is exactly a kind of time slot allocative decision, Ω
It is reduced to time slot sets with R.The i.e. present invention is that the base station in the interference protection region of user carries out interference synergic.
Base station type, transmitting power in the present invention can be the same or different, and the coverage of base station can be to appoint
The area of coverage of what shape, including cellular cell.Further, threshold T, the covering measures of system requires that β can be actual according to system
Demand determines, the threshold value of each user can be the same or different.
Embodiment 1:
With reference to the accompanying drawings and combine the preferred embodiments of the present invention to describe the one of the present invention based on interference protection district
The interference synergic method in territory.
Only frequency resource being carried out multiplexing distribution in the present embodiment, now Ω and R is reduced to frequency sets, and Ω is whole system
The usable frequency set of system.
See Fig. 1, the interference protection region partitioning method of the grand user of macro base station-Home eNodeB double layer network in the present invention
And frequency resource allocation method.Interference protection region and the nothing of the user of random layer can be designed according to the proposed method
Line resource is distributed, thus solves the AF panel problem of multilayer heterogeneous network.
Step 1: according to P (SINR ＞ T) ＞ β calculate grand user meet the interference protection zone radius that covering measures requires
r0=y-1(β), whereinPmAnd PfIt is respectively sending out of macro base station
Penetrate the transmitting power of power and Home eNodeB, r1For the distance between user and its macro base station serviced, λ is the small-sized base of interference
The density stood, σ2For noise power, T is Signal to Interference plus Noise Ratio thresholding, and β is the covering measures requirement of system.θDamage for Home eNodeB path
Consumption index；αFor macro base station path loss index；
Step 2: customer-centric, r0The interference protection region of user is obtained for radius.Wherein, interference protection region by
The Signal to Interference plus Noise Ratio thresholding T of system, the covering measures of system requires the transmitting power P of the serving BS of β, userm, user takes with it
Distance r of business base station1, the density of interference base station and the transmitting power of interference base station comprehensively determine.The interference protection of different user
Area size may be different.Such as, the interference protection region of grand user 2 is significantly greater than the interference protection region of grand user 1.
Step 3: Home eNodeB 1 (fBS1) is in the interference protection region of grand user 1, therefore, macro base station is carried out with fBS1
Interference synergic.
Step 4: macro base station be grand user 1 distribute Ω Radio Resource in R, R represents the wireless money that fBS1 takies here
Source.
Base station type, transmitting power in the present invention can be the same or different, and the coverage of base station can be to appoint
The area of coverage of what shape, including cellular cell.Further, threshold T, the covering measures of system requires that β can be actual according to system
Demand determines, the threshold value of each user can be the same or different.
Claims (2)
1. an interference synergic method based on interference protection region, it is characterised in that comprise the steps:
Step 1, each is needed the user that base station services, calculate user's according to user covering measures P more than threshold value
Interference protection radius r0,
r0=y- 1(β)；Formula (1)
Wherein: PmAnd PfBe respectively macro base station launches power and the transmitting power of small base station, r1For user service with it grand
Distance between base station, λ is the density of the small base station of interference, σ2For noise power, T is Signal to Interference plus Noise Ratio thresholding, and β is that system is wanted
The covering measures threshold value asked；θ is small base station path loss index；α is macro base station path loss index；
Step 2, customer-centric, interference protection radius is the interference protection region that border circular areas is user of radius；
Step 3, the usable radio resources set of macro base station and all small base stations is designated as Ω, if active user's interference protection
The Radio Resource that the base station of intra-zone has taken is designated as R, wherein,Then the usable radio resources of active user can only
From set of radio resources Ω R chooses.If the Radio Resource that active user has taken is designated as S, wherein,The most current
The usable radio resources of the base station of user's interference protection intra-zone can only from set of radio resources Ω S chooses.I.e. current use
The small base station of the interference protection intra-zone at family can not share Radio Resource with active user.
Method the most according to claim 1, wherein noise power σ described in step 12, take in interference-limited system
0。
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| CN105898758B CN105898758B (en) | 2019-05-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107018515A (en) * | 2017-03-03 | 2017-08-04 | 北京科技大学 | Heterogeneous hierarchical LTE system fractional frequency reuse method based on intermediary's region optimizing |
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| US20150173089A1 (en) * | 2012-07-19 | 2015-06-18 | Samsung Electronics Co., Ltd. | Method and system for delivering system information to user equipment in region of co-channel interference |
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| CN101827373A (en) * | 2010-03-02 | 2010-09-08 | 北京邮电大学 | Method and device for acquiring interference margins in OFDM system |
| US20150173089A1 (en) * | 2012-07-19 | 2015-06-18 | Samsung Electronics Co., Ltd. | Method and system for delivering system information to user equipment in region of co-channel interference |
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Effective date of registration: 20200305 Address after: 518000 Guangdong city of Shenzhen province Baoan District Fuyong street baishixia New Development Zone seventh Patentee after: Shenzhen Xinzhen Intelligent Electronics Co.,Ltd. Address before: 310027 No. 2 street, Xiasha Higher Education Zone, Hangzhou, Zhejiang Patentee before: Hangzhou Electronic Science and Technology Univ |