CN106452653A - Method for inhibiting interference of distributed multi-antenna system on macro cellular base station - Google Patents
Method for inhibiting interference of distributed multi-antenna system on macro cellular base station Download PDFInfo
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- CN106452653A CN106452653A CN201610997191.2A CN201610997191A CN106452653A CN 106452653 A CN106452653 A CN 106452653A CN 201610997191 A CN201610997191 A CN 201610997191A CN 106452653 A CN106452653 A CN 106452653A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
- H04J11/005—Interference mitigation or co-ordination of intercell interference
- H04J11/0056—Inter-base station aspects
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Abstract
The invention provides a method for inhibiting interference of a distributed multi-antenna system on a macro cellular base station. The method comprises the following steps: the plurality of single-antenna micro cellular base stations are managed in a unified manner by using a concentrated control terminal, and the plurality of antennas of the micro cellular base stations form the distributed multi-antenna system with the action of the concentrated control terminal; the distributed multi-antenna system is automatically clustered according to a distribution condition of mobile users in an area; distributed beam forming is achieved on the mobile users in each cluster; as interference orientation from the macro cellular base station is fixed, and the distributed multi-antenna system utilizes the known orientation information of the macro cellular base station to form a null point for the interference from the macro cellular base station, and thus the interference from the macro cellular base station is effectively inhibited; and the transmitting power of the base station in the cluster is adjusted according to a receiving SNR condition of the mobile users. According to the method provided by the invention, the interference from the macro cell can be effectively reduced while communication quality is met, and meanwhile the adjusting speed of the base station power is improved.
Description
Technical field
The present invention relates to the suppressing method that a kind of distributed multi-antenna system is disturbed to macrocell base stations, belong to mechanics of communication
Field.
Background technology
The advantage of microcellulor technology is intended to combine with wireless access using indoor fixed line circuit and the Internet, so that
The High-speed wireless access to indoor user is realized in the wireless base station of microcellulor.At present the research aspect of microcellulor is concentrated mainly on
Research to the agreement of the interconnection between microcellulor and macrocellular, signaling and high-speed packet transmission aspect, and for microcell base station
The research of itself particularly utilizes the research of multi-antenna technology extremely limited at microcell base station end.
In terms of the theoretical research to micro cellular system, document (An Overview of the femtocell
Concept, Bell LABS TECHNICAL JOURNAL, Article first published online：15 MAY
2008) the platypelloid type Internet protocol based on base station router and feature under the conditions of microcellulor are discussed in.Claussen, H.
Deng (Claussen, H.；Pivit, F.；Bell Labs., " Femtocell Coverage Optimization Using
Switched Multi-Element Antennas ", ICC2009, Dresden, 14-18 June 2009, pp1-6.) discuss
Micro cellular system utilizes low-power consumption, the base station of low cost can be that terminal use provides macrocellular coverage not enough supplement
Communication with two-forty.Can be reduced due to the movement of outdoor subscriber by the selection of multiple antennas and suitable antenna mode and increase
Plus signaling consumption.Make the covering model of microcellulor by the pattern of combined optimization antenna and the transmission power of signaling and antenna
Enclose more preferable Yu indoor spatial form to match and decrease the network signaling overhead being increased by moving event.And Kim,
R.Y. (Kim, R.Y. are waited；Jin Sam Kwak；Etemad, K.；“WiMAX femtocell：Requirements,
Challenges, and solutions ", IEEE communication Magazine, Sept 2009, Vol 47 (9), pp：
84-91) discuss indoors under environment, the expense of backbone network can be reduced using micro cellular system and improve user's ring indoors
Performance under border.And the requirement for WIMAX microcellulor is it is proposed that the model that can use and recent and long-term solution party
Method.(Nihtila, the T. such as Nihtila, T.；Increasing Femto Cell Throughput with HSDPA Using
Higher Order Modulation, ICNN 2008, Lahore, pp49-53,1-3MAY 2008) have evaluated in microcellulor bar
Under part, how to effectively utilize the bit error rate performance situation using system during high order modulation for the high s/n ratio advantage of system.
(Knisely, the D. such as Knisely, D.；Yoshizawa, T.；Favichia, F.；Standardization of
Femtocells in 3GPP, IEEE communication Magazine, Sept 2009, VOL47 (9), pp68-75) it is situated between
The micro cellular system structure that continued Standardization in 3 gpp.(Morita, the M. such as Morita, M.；Matsunaga, Y.；
Hamabe, K.；Adaptive Power Level Setting of Femtocell Base Stations for
Mitigating Interference with Macrocells, VTC 2010,6-9Sept, 2010, Ottawa, pp1-5) lead to
Cross the interference that the transmission power of adaptive adjustment microcell base station single antenna eliminates from neighbouring macrocellular and improve system
Signal to Interference plus Noise Ratio, thus improve the data throughput of micro cellular system.(Simsek, the M. such as Simsek, M.；Akbudak, T.；
Bo Zhao；Czylwik, A.；An LTE-femtocell dynamic system level simulator, Smart
Antennas (WSA), 2010International ITG Workshop on, 23-24 Feb.2010, Bremen, pp：66-
71.) tentatively discuss and be aligned by using precoding and adaptive disturbance to disappear using multi-antenna technology in micro cellular system
Interference between except microcellulor, and using different microcellulors between multiple antennas form distributed multiaerial system to improve system
The situation of performance of BER.
In prior art, microcell base station is all generally the transmitting-receiving being exploited separately for mobile subscriber's signal, will not
Multiple microcell base stations combine the scheme carrying out signal transmitting and receiving.Micro cellular system in actual application, except the micro- honeybee closing on
Have between nest outside mutual interference, also suffer from the interference from macrocell base stations.
In existing system, need the adjustment that the transmission power to microcell base station is carried out repeatedly just can accomplish to make grand honeybee
The interference of nest base station is reduced, and so that microcell base station is effectively communicated.Not using many bases in existing method
Stand associated working come to realize communicate and suppress macrocell base stations interference method.
Content of the invention
The technical problem to be solved in the present invention is how to realize communicating and suppression macrocellular using multiple base stations united work
Base station is disturbed.
In order to solve above-mentioned technical problem, the technical scheme is that a kind of distributed multi-antenna system of offer to grand honeybee
The suppressing method of nest base station interference is it is characterised in that the method is made up of following 5 steps：
Step 1：Using centralized Control end, unified management is carried out to multiple microcell base stations with single antenna, concentrating
In the presence of control end, the multiple antennas of multiple microcell base stations form distributed multiaerial system；
Step 2：According to the distribution situation of mobile subscriber in region, automatic sub-clustering is carried out to distributed multiaerial system,
Centralized Control end is effectively managed to these clusters；
Step 3：In each cluster, distributed beam shaping is realized to the mobile subscriber in cluster；When mobile subscriber moves to
During different cluster, jointly realize distributed beam shaping for these mobile subscribers by the multiple antennas of different clusters；
Step 4：Because the jamming bearing from macrocell base stations is fixing, distributed multiaerial system utilizes known
The azimuth information of macrocell base stations null point is formed to the interference from macrocell base stations, thus to from macrocell base stations
Interference is effectively suppressed；
Step 5：According to the state of signal-to-noise that accepts of mobile subscriber, adjust the transmission power of base station in cluster.
Preferably, in described step 1, in a specific region, using a centralized Control end, to many in this region
The individual microcell base station with single antenna carries out centralized Control；In the presence of centralized Control end, can be to micro- honeybee in this region
The transmission power of nest base station coordinates, and now the multiple microcell base stations in this region are equivalent to be a base station, and this
The antenna of a little base stations just constitutes the distributing antenna system being distributed in diverse location.
Preferably, in described step 2, each cluster is to be made up of adjacent multiple microcell base stations.
Preferably, in described step 3, the distributed multiaerial system of the same area is realized after sub-clustering management, permissible
Quantity according to the mobile subscriber in different clusters carries out the allotment of power to the multiaerial system of different clusters, the cluster more than mobile subscriber
Interior increase transmission power that can be suitable, and less power can be distributed in the less cluster of mobile subscriber.
Preferably, in described step 3, during beam shaping, the transmission power of single microcell base station antenna is constant, Duo Getian
Can be so that the signal quality of coated region be exponentially improved after line beam shaping.
Preferably, in described step 4, the orientation due to macrocellular is constant for fixing region, and this orientation is believed
Breath can become the Given information of this regional centralized control end；Distributed multiaerial system assumes there be M single antenna, and M is just
Integer, then can have M-1 degree of freedom can use, you can to form M-1 wave beam, now the jamming bearing of macrocellular can be carved
One null point of formation of meaning, so that the distributed beams of this cluster are formed in the mobile subscriber's communication quality meeting in this cluster
While, effectively inhibit the interference from macrocell base stations.
Preferably, in described step 5, due to the beam shaping of distributed multi-antenna system, directly according to mobile subscriber's
Received signal to noise ratio situation adjust base station in cluster transmission power can it is not necessary to measurement repeatedly is derived from the interference of macrocellular,
Do not need the transmission power of each base station is carried out with adjustment repeatedly.
For micro cellular system, the microcell base station in order to overcome the interference coming from macrocell base stations, to the same area
Realize the control concentrated, constitute distributed multiaerial system in the presence of centralized Control end.Work due to centralized Control end
With multiple antennas at this moment are equivalent to the antenna of a base station, can be by distributed beam shaping to the movement in this region
User realizes effectively communicating.
In order to tackle the problem pockety of mobile subscriber in region, the distributed multi-antenna in this region is adopted automatically
Using the distributed multi-antenna in each cluster, the management of sub-clustering, is at this moment achieved that the distributed beams to mobile subscriber in cluster become
Shape.Simultaneously in order to effectively suppress the interference from macrocell base stations, can be under the control at centralized Control end, using macrocellular
Azimuth information, null point is formed on this orientation, such that it is able to real while realizing to mobile subscriber's efficient communication in cluster
Show the effective suppression to macrocell base stations interference.
After completing beam shaping, base station in cluster is adjusted by the situation of the signal to noise ratio of mobile subscriber's receipt signal in cluster
Transmission power, make mobile subscriber can obtain the signal noise ratio level higher than thresholding.
Compared to existing technology, the method that the present invention provides has the advantages that：
1st, can effectively improve the communication matter of mobile subscriber using the distributed multi-antenna system that centralized Control end is formed
Amount.
2nd, according to the distribution situation of mobile subscriber, adaptive sub-clustering is carried out to distributed multi-antenna system, to the shifting in cluster
Employ family to form wave beam and form null point, thus can effectively drop while meeting communication quality to the orientation of macrocellular
The low interference from macrocellular.
3rd, being shaped using the distributed beams of self adaptation sub-clustering can be by carrying out simply to the transmission power of base station in cluster
Adjustment the complexity of adjustment can be made to be reduced so that mobile subscriber obtains reliable communication efficiency.
Brief description
Fig. 1 is the process of inhibition schematic diagram that distributed multiaerial system realizes to macrocellular interference.
Specific embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than restriction the scope of the present invention.In addition, it is to be understood that after having read the content of present invention instruction, people in the art
Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
The present invention forms distributed multiple antennas system the single antenna belonging to different base station in the presence of centralized Control end
System, the distribution situation according to user is divided into different clusters distributed multiaerial system simultaneously, the multiple Dan Tian in each cluster
Line base station is that the user in these clusters carries out communication service.In order to effectively overcome the interference from macrocell base stations, each cluster
Multiple antennas to realizing distributed beam shaping in cluster, can make in cluster on the premise of each antenna transmitting smaller power
Mobile subscriber obtains higher received signal to noise ratio.The directed radiation that this distributed beam shaping is realized for macroscopically
While improving mobile subscriber's received signal to noise ratio, null point can be formed to the interference radiating way of macrocellular.And in fixation
Region, the incoming wave orientation of macrocellular is known, and this is also provided to using the interference of distributed multiple antennas suppression macrocellular
Convenient.Meanwhile, distributed multiaerial system can also reduce the complexity of the algorithm for suppression interference.
In conjunction with Fig. 1, the tool to the suppressing method that macrocell base stations are disturbed for the distributed multi-antenna system that the present embodiment provides
Body step is as follows：
I, the centralized Control to microcell base station：
Due in the mobile communication realized using microcell base station, so that all standing of movable signal non-blind area,
Therefore need more microcell base stations in places such as for example large-scale office in some specific regions, market, conference halls.If
These microcell base stations are all to work independently, then can form more interference between adjacent base station.And if to these
Base station is controlled it is possible to coordinating to adjacent base station and controlling so that same by what center control end concentrated
The different base station in individual region forms distributed multiaerial system, can effectively reduce micro- honeybee under the control of center control end
Interference between nest base station.
In a specific region, a such as large-scale office space is it is assumed that there is N number of microcellulor base with single antenna
Stand, these base stations carry out centralized Control now by wired connection, have the unified management at a centralized Control end and coordinate this
A little base stations are mobile subscriber's service in this region.In the presence of centralized Control end, can be to the letter of this N number of base station in this region
Number and the coordination that synchronizes of transmission power, now this N number of base station be equivalent to be a base station, and the antenna of these base stations is just
Constitute the distributing antenna system being distributed in diverse location.The advantage of spaced antenna is to be laid in different positions,
Whole region is realized with the covering of non-blind area.
II, the automatic sub-clustering management of many base station distribution formula antenna：
After forming distributed antenna in the presence of centralized Control end, multiple single-antenna base station in same region are just
Constitute distributed multiaerial system.If the mobile subscriber's distribution situation change in this region is less, then for these
The control of distributed antenna is very simple.But when the mobile subscriber's distribution situation in region often changes,
The distribution that more distributed multiaerial system is carried out with power wants complexity with controlling with regard to relative.
In order to be conducive to the distribution of resource, and effectively tackle the diverse location skewness in the same area for the mobile subscriber
Problem, sub-clustering is carried out to the single-antenna base station of the same area, that is, opsition dependent is divided into different groups adjacent single-antenna base station,
So the multiple antennas in each cluster constitute distributed multi-antenna system.The method of sub-clustering can effectively be tackled mobile subscriber and exist
The problem of the skewness of the same area, can effectively allocate transmission power so that the mobile subscriber in different clusters is all obtained can
The communication quality leaning on.
N number of distributed multiple antennas automatically can be divided into M different cluster under the control at centralized Control end, each
Cluster is to be made up of adjacent multiple distributed base stations.Now, centralized Control end is effectively managed to this M cluster, works as shifting
When employing family and moving to different clusters, the multiple antennas having different clusters are jointly realized distributed wave beam for these mobile subscribers and are become
Shape, thus improve the communication quality to mobile subscriber.
III, to the suppression disturbed from macrocell base stations：
The distributed multi-antenna system of the same area is realized after sub-clustering management, can be according to mobile subscriber in different clusters
Access the transmission power that quantity flexibly allocates the spaced antenna of different clusters, so that the mobile subscriber in different cluster obtains
Reliable communication quality.The advantage that distributed beams shape is that less power launched by the single antenna antenna of each base station,
Multiple antenna beams can make the signal quality of coated region being improved at double after shaping, and in the nondirectional area of coverage
Domain does not have this effect.Now, the beam shaping of the distributed multi-antenna in each cluster can effectively be used for tackling
Interference from macrocellular.Orientation due to macrocellular is constant for fixing region, and this azimuth information can become this
The Given information of regional centralized control end, distributed multiple antennas assume there be M single antenna, then can have the M-1 degree of freedom can
With, you can to form M-1 wave beam, now can to the jamming bearing of macrocellular one null point of formation deliberately so that
While obtaining the distributed beams of this cluster and be formed in the mobile subscriber meeting in this cluster and can obtain higher signal to noise ratio, effectively
Inhibit the interference from macrocell base stations.Simultaneously as the beam shaping of distributed multi-antenna system, the work(to base station in cluster
Rate can be obtained by the interference weighed received signal to noise ratio and be derived from macrocellular it is not necessary to repeatedly by simple adjustment,
Also avoid the need for the transmission power of each base station is carried out with adjustment repeatedly, so that the complexity of algorithm is reduced, decrease
The adjustment time of base station power.
Claims (7)
1. a kind of distributed multi-antenna system is disturbed to macrocell base stations suppressing method is it is characterised in that the method is by following 5
Individual step composition：
Step 1：Using centralized Control end, unified management is carried out to multiple microcell base stations with single antenna, in centralized Control
In the presence of end, the multiple antennas of multiple microcell base stations form distributed multiaerial system；
Step 2：According to the distribution situation of mobile subscriber in region, distributed multiaerial system is carried out with automatic sub-clustering, concentrate
Control end is effectively managed to these clusters；
Step 3：In each cluster, distributed beam shaping is realized to the mobile subscriber in cluster；When mobile subscriber moves to difference
Cluster when, jointly realize distributed beam shaping for these mobile subscribers by the multiple antennas of different clusters；
Step 4：Because the jamming bearing from macrocell base stations is fixing, distributed multiaerial system utilizes known grand
The azimuth information of cellular basestation forms null point to the interference from macrocell base stations, thus to the interference from macrocell base stations
Effectively suppressed；
Step 5：According to the state of signal-to-noise that accepts of mobile subscriber, adjust the transmission power of base station in cluster.
2. the suppressing method that a kind of distributed multi-antenna system is disturbed to macrocell base stations as claimed in claim 1, its feature
It is：In described step 1, in a specific region, using a centralized Control end, to multiple in this region, there is Dan Tian
The microcell base station of line carries out centralized Control；In the presence of centralized Control end, can sending out to the microcell base station in this region
Penetrate power to coordinate, now the multiple microcell base stations in this region are equivalent to be a base station, and the sky of these base stations
Line just constitutes the distributing antenna system being distributed in diverse location.
3. the suppressing method that a kind of distributed multi-antenna system is disturbed to macrocell base stations as claimed in claim 1, its feature
It is：In described step 2, each cluster is to be made up of adjacent multiple microcell base stations.
4. the suppressing method that a kind of distributed multi-antenna system is disturbed to macrocell base stations as claimed in claim 1, its feature
It is：In described step 3, the distributed multiaerial system of the same area is realized after sub-clustering management, can be according to different clusters
The quantity of interior mobile subscriber carries out the allotment of power to the multiaerial system of different clusters, can be suitable in the cluster more than mobile subscriber
Increase transmission power, and less power can be distributed in the less cluster of mobile subscriber.
5. the suppressing method that a kind of distributed multi-antenna system is disturbed to macrocell base stations as claimed in claim 1, its feature
It is：In described step 3, during beam shaping, the transmission power of single microcell base station antenna is constant, and 3 antenna beams shape
Afterwards can be so that the signal quality of coated region be exponentially improved.
6. the suppressing method that a kind of distributed multi-antenna system is disturbed to macrocell base stations as claimed in claim 1, its feature
It is：In described step 4, the orientation due to macrocellular is constant for fixing region, and this azimuth information can become
The Given information of this regional centralized control end；Distributed multiaerial system assumes there be M single antenna, and M is positive integer, then permissible
M-1 degree of freedom is had to can use, you can to form M-1 wave beam, now can be to the formation one deliberately of the jamming bearing of macrocellular
Individual null point, so that while the distributed beams of this cluster are formed in the mobile subscriber's communication quality meeting in this cluster, have
The interference inhibiting from macrocell base stations of effect.
7. the suppressing method that a kind of distributed multi-antenna system is disturbed to macrocell base stations as claimed in claim 1, its feature
It is：In described step 5, due to the beam shaping of distributed multi-antenna system, the directly received signal to noise ratio according to mobile subscriber
The transmission power that situation adjusts base station in cluster can be it is not necessary to measurement repeatedly be derived from the interference of macrocellular it is not required that to each
The transmission power of base station carries out adjustment repeatedly.
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Cited By (2)
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| CN109004945A (en) * | 2018-08-03 | 2018-12-14 | 深圳博特创新科技有限公司 | Reception system is passed for the multiple spot distribution figure of venue echo interference |
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