CN1867157B - Wireless network system and capacity expansion method - Google Patents
Wireless network system and capacity expansion method Download PDFInfo
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- CN1867157B CN1867157B CN2006100665513A CN200610066551A CN1867157B CN 1867157 B CN1867157 B CN 1867157B CN 2006100665513 A CN2006100665513 A CN 2006100665513A CN 200610066551 A CN200610066551 A CN 200610066551A CN 1867157 B CN1867157 B CN 1867157B
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Abstract
The invention relates to a wireless network system and relative capacity expanding method. Wherein, it is characterized in that: in the wireless network system, using special antenna configuration to support the network combination and capacity expansion; it uses beehive section as unit to set one group of antennas, which is used to be related with one group of regions that covering the beehive section; each antenna is responsible to cover one section; said group of antenna can use the shaping antenna with several inputs. Therefore, the invention can make the network use low-capacity and low-cost cover at the start, and realize smooth capacity expansion without increasing new station.
Description
Technical field
The present invention relates to wireless communication technology, relate in particular to the networking technology of the communication system (being called for short the 3G system) of third generation WCDMA, CDMA2000.
Background technology
Mobile communcations system is made up of a lot of base station (being called BTS), and provides service by each covering coverage, base station for the user terminal that is in the overlay area.Therefore the area coverage picture honeycomb one by one of base station claims again " cellular system ".
Existing wireless cellular system is basically with three sector form networking, as shown in Figure 1, circle is represented base station location among the figure, arrow is represented the sensing of antenna for base station, sensing at this structural antenna is staggered mutually, therefore, described three sector networking modes have the directional diagram of antenna and the overlay area forms best fit, and advantage such as the interference between the network cell is little.
The foundation of mobile communcations system need be provided with a lot of honeycombs, promptly needs to be provided with a large amount of base stations, the size that how much has determined the network investment cost of the base station number of setting.If make the area coverage of each base station big, the quantity of then setting up the base station of mobile communcations system needs will be lacked, like this, just corresponding networking investment can be lacked.
But the capacity of a base station is limited, therefore when its area coverage is big, will cause capacity density to diminish, and promptly can provide the access number of users to diminish in the unit are.And then cause, when the number of users in the system constantly increases, then need to increase new base station, promptly carry out the network capacity extension.After having increased new base station, reserve corresponding area coverage in order to give newly-increased base station, just need to reduce the area coverage of original base station, this processing is called network division or splitting.
Based on above-mentioned network splitting technology, the desirable networking mode that can adopt at present is: during initial networking, at first make each base station area coverage big, to reduce initial outlay; After, along with the user increases progressively dilatation again, also promptly constantly carry out the network splitting.
Yet adopting network splitting mode to carry out in the processing procedure of dilatation, except needs added necessary equipment, localized network also will carry out complicated readjusting, and causes the dilatation cost too high.For example, in the 3G wireless telecommunication system that adopts WCDMA and CDMA2000 standard, when needs passed through the dilatation of newly-increased base station, in corresponding dilatation processing procedure, the selection of the site of newly-increased base station will bring the site construction cost; And because 3G covers and capacity is associated, the network planning and engineering construction be more complicated all, causes newly-increased base station will increase the base station newly with regard to needs and original base station is on every side carried out the network planning together again, and this this processing can bring bigger workload equally.Therefore, the implementation by the new base station dilatation of this increase will cause the dilatation cost higher.
With Fig. 2 is example, newly-increased base station in the middle of three base station A, the B of Fig. 2, C if desired, and its coverage is seen among Fig. 2 shown in the dashed circle.In Fig. 2, the antenna direction of base station A, B, C is shown in thick arrow, just because the variation of base station coverage area, the antenna of each base station all needs to change the antenna of new spec, and the sensing of antenna all must be carried out interaction adjustment with new antenna for base station with the inclination angle, to meet network planning requirement.And, cause in the overlay area of this expectation, will inevitably having the zone that can't cover because the overlay area of newly-increased base station expectation is irregular.
For example, be divided into three network topology to one of right side as can be seen by the existing network dilatation among Fig. 3 by the left side, in dilation process, if keep the network configuration of three sectors of existing network, then need become the base station center of equilateral triangle to increase a base station, and the antenna of original base station all need need be adjusted 30 degree at per three; Simultaneously, also need increase the site in the dilatation processing procedure, therefore, in present network organizing,, be difficult to accomplish that smooth expansion handles when being divided into two or one when being divided into three network capacity extension operation.
As can be seen, though existing three sectors are best network construction forms of 3G wireless network.But because the existence of above-mentioned problems, cause at present and can't carry out one-to-two, two minutes four gradual smooth expansion based on this three sectors networking.
Therefore, for fear of the appearance of unsmooth dilatation problem, industry generally adopts the network planning principle of " disposable planning " at present.Promptly in several years, the demand of capacity is planned networking, thereby guarantee in several years, need not network is carried out dilatation.
But the implementation of this " disposable planning " will bring following problem:
(1) begin in the wireless network networking, just need to arrange the base station of sufficient amount, and each base station all there are some fixing expenses such as the expense of building a station, storage battery expense and rental charge, cause initial outlay bigger, bring bigger investment pressure and risk to the operator.
(2) because " disposable planning " needs site, more base station, base station, may appear at the position that to build a station suitable site can't be provided, cause network to make rational planning for.
(3) implementation of existing " disposable planning " problem of just temporarily having avoided dilatation does not fundamentally solve the problem that is caused by dilatation that may occur in the future.
Summary of the invention
The purpose of this invention is to provide a kind of Radio Network System and expansion method, the problem that exists with the networking mode that solves " disposable planning " in the prior art, but and provide a kind of networking implementation of smooth expansion for wireless communication system.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides a kind of Radio Network System, be included in and be provided with antenna in the network, the setting of described antenna comprises:
With cellular zone is that unit is provided with one group of antenna, and described one group of antenna is used for the corresponding one group of sub-district that covers cellular zone, and every road antenna is responsible for covering one of them sub-district.
What described one group of antenna adopted is shaped aerial; Described shaped aerial is used for the coverage cell after definite initial coverage cell and the dilatation; Wherein, described shaped aerial comprises two-way input at least, and the input quantity that comprises of described shaped aerial is not less than the quantity of the coverage cell after the described dilatation.
Described shaped aerial is the shaped aerial that comprises four inputs.
Described shaped aerial also is connected with and uses four the road or two-way power mixer, by four the road or two-way power mixer or switch matrix control shaped aerial obtain one tunnel, two road or No. three antennas of equivalence.
Described one group of sub-district comprises: cellular zone is vertically divided the sub-district of acquisition and/or cellular zone laterally divided the sub-district of acquisition according to original antenna direction according to original antenna direction.
The regional extent of each sub-district that comprises in described one group of sub-district big or small identical.
The present invention also provides a kind of implementation method of wireless network dilatation, comprising:
A, the cellular cell in zone to be expanded is divided at least two separate overlay areas,
B, comprise the shaped aerial of two-way input at least, and the input quantity that comprises of described shaped aerial is not less than the quantity of described overlay area for each zone in described at least two separate overlay areas is provided with one respectively; Described shaped aerial is used for the coverage cell after definite initial coverage cell and the dilatation.
Described step B comprises:
B1, employing comprise the shaped aerials of four tunnel inputs as the antenna in described at least two separate overlay areas.
Described step B1 comprises:
When comprising two separate overlay areas, then utilize two two-way power mixers or switch matrix that the road is closed in the input of four tunnel in the described shaped aerial and import, the corresponding overlay area of every road input for two-way;
Perhaps,
When comprising three separate overlay areas, then utilize a two-way power mixer or switch matrix that the two-way in the input of four tunnel in the described shaped aerial is closed the input of Lu Weiyi road, obtain three tunnel inputs altogether, and the corresponding overlay area of every road input;
Perhaps,
When comprising four separate overlay areas, then directly utilize four tunnel inputs of described shaped aerial, the corresponding overlay area of every road input.
As seen from the above technical solution provided by the invention, the present invention proposes a kind of new low-cost dilatation (or smooth expansion) networking plan, solved the dilatation contradictory problems that prior art exists better, thereby make network both can when initial, carry out low capacity, the low-cost covering, can under the situation that does not increase new site, realize very level and smooth dilatation again.Be that realization of the present invention makes low-cost initial networking and low-cost smooth expansion be called possibility.
Description of drawings
Fig. 1 is that three sectors cover schematic diagram;
Fig. 2 is three sector dilatation schematic diagrames;
Fig. 3 is the example schematic diagram of network smooth expansion failure;
Fig. 4 is the schematic diagram of network capacity extension mode one provided by the invention;
Fig. 5 is the schematic diagram of network capacity extension mode two provided by the invention;
Fig. 6 is the schematic diagram of network capacity extension mode three provided by the invention;
Fig. 7 is the schematic diagram of network capacity extension mode four provided by the invention;
The schematic diagram of the shaped aerial that Fig. 8 adopts when specifically implementing for the present invention;
Fig. 9 is the compound direction figure of the initial coverage condition before the not dilatation;
Figure 10 is the coverage condition compound direction figure after the dilatation first;
Figure 11 is the coverage condition compound direction figure after the dilatation once more;
Figure 12 is a hot localised points area dilatation schematic diagram.
Embodiment
Technical scheme provided by the invention can make the operator carry out initial network with low cost and cover, and can carry out level and smooth dilatation again in needs.The present invention's main thought in the specific implementation process comprises: adopt three common sector low capacity, the low-cost network organizing mode that covers when initial, reduce the initial outlay expense.When network needs dilatation, adopt the covering scheme of carrying out the vertical and horizontal splitting, thereby can only change under the situation of antenna of employing not increasing site, base station quantity along original antenna direction, realize level and smooth low-cost dilatation at wireless network.
Among the present invention, specifically can adopt the excipient antenna to implement networking plan provided by the invention, can be by the combination of excipient antenna and input thereof so that do not change antenna during above-mentioned dilatation.Among the present invention, can utilize shaped aerial to be combined into the coverage direction figure of three sectors on the one hand, use for initial the covering; Can also produce the directional diagram after the network splitting on the other hand, use during for dilatation.
Like this, during dilatation after initially covering, the antenna of base station need not be adjusted, and has reduced the workload and the complexity of dilatation.Also can make up, also can carry out dilatation by the built-in switch matrix by external power combiner (or directional coupler) and excipient antenna.
For ease of the understanding of the present invention, specific implementation of the present invention is elaborated below in conjunction with accompanying drawing.
When carrying out the initial networking of cordless communication network, adopt three sector network shown in Figure 1, carry out low capacity, the low-cost covering, carry out smooth expansion from hot localised points then.
In order to accomplish smooth expansion, the present invention proposes new splitting dilatation and cover scheme, be the implementation schematic diagram of dilatation first as Fig. 4, promptly along the network coverage of antenna direction splitting two halves.In this scheme, topology of networks no longer is the honeycombed of positive hexagon during dilatation, but is divided into two " half regular hexagons " along antenna direction, each " half regular hexagon " corresponding sub-district.Like this, the number of site, base station does not increase during dilatation, only needs to increase necessary equipment in the capacity expansion and gets final product, and corresponding equipment in the capacity expansion comprises: one group of new supporting carrier frequency module or base station of antenna and base station.Specifically can adopt two shaped aerials to replace original antenna as described one group of antenna, the directional diagram of every antenna is half of original antenna, covering so altogether was the same with original zone, but capacity increased, and probably can increase by 80% through the corresponding capacity of emulation testing.
Among the present invention, can also adopt horizontal splitting mode to carry out the dilatation operation, specific implementation is two sub-districts with the horizontal splitting of original cellular cell as shown in Figure 5, and adopt corresponding one group of antenna to replace original antenna, thereby can realize dilatation at wireless network.
Among the present invention, when needs further carry out dilatation to network, then also can adopt splitting is three cell scenario, specifically as shown in Figure 6, common three sub-district areas are equal substantially, at this moment, need to adopt the one group of antenna that comprises No. three antennas to replace original antenna, every road antenna is responsible for covering a sub-district, realizes the dilatation of wireless network.
Same principle, further the present invention can also be divided into existing cellular cell the dilatation implementation of four sub-districts, specifically as shown in Figure 7, and four sub-district areas are equal substantially, at this moment, need to adopt the one group of antenna that comprises No. four antennas to replace original antenna, every road antenna is responsible for covering a sub-district, realizes the dilatation of wireless network.
Among the present invention, specifically can adopt the shaped aerial that comprises multi-channel input to replace original antenna as described one group of antenna.Need to prove: if in wireless network, adopted the shaped aerial of corresponding multi-channel input, then when carrying out dilatation, only need just can under the situation of not changing antenna, realize dilatation in conjunction with corresponding power mixer or switch matrix by the shaped aerial technology.
At first will realization that adopt shaped aerial to carry out the wireless network networking being described below, certainly, also can adopt other antennas that can realize the shaped aerial function to realize among the present invention, at this, will be that example describes to adopt shaped aerial.
The invention provides a kind of Radio Network System, in this system, be provided with antenna, the set-up mode of described antenna is specially: with cellular zone is that unit is provided with one group of antenna, described one group of antenna is used for the corresponding one group of sub-district that covers cellular zone, and every road antenna is responsible for covering one of them sub-district; And, the sub-district that obtains can be divided for cellular zone being carried out horizontal direction in described one group of sub-district, also can divide the sub-district that obtains for cellular zone being carried out vertical direction, perhaps, comprise the sub-district that two kinds of dividing mode obtain, the size of the regional extent that each sub-district comprises can be identical or different.That is to say, in the present invention, form cellular zone, utilize this cellular zone just can cover more wide communication zone by one group of sub-district that one group of antenna covers.
Among the present invention, described one group of antenna can adopt shaped aerial to realize, specifically the shaped aerial that comprises four inputs with employing is an example, described shaped aerial also is connected with and uses four the road or two-way power mixer or switch matrix, by four the road or two-way power mixer or switch matrix control shaped aerial obtain one tunnel, two road or No. three antennas of equivalence.
The structure of the excipient antenna that comprises four inputs that the present invention adopts is concrete shown in Fig. 8 (being Fig. 8 a to Fig. 8 e), can by four the road or the control equivalence of two-way power mixer obtains one the tunnel, two-way or No. three antennas, and then can realize the network evolution that needs.Concrete control mode is with reference to Fig. 8, and the shaped aerial itself that comprises four inputs can be equivalent as No. four antennas; Afterwards, on shaped aerial, connect one four road power mixer, can equivalence obtain No. one antenna, promptly can realize single sector pattern with four inputs, its horizontal plane, elevation radiation patytern as shown in Figure 9, this situation can be used when initial networking; Connect two two-way power mixers, then can equivalence obtain the two-way antenna; Connect one one road power mixer, then can equivalence obtain No. three antennas.That is to say, use four the tunnel, two-way power mixer (perhaps being called directional coupler) carries out various combination, can realize respectively that just networking plan provided by the invention and follow-up dilatation handle.
The shaped aerial that below will be more in conjunction with the accompanying drawings employing be comprised multi-channel input describes the specific implementation that existing wireless communications network carries out the dilatation operation.
Embodiment one
When carrying out first time dilatation at existing cordless communication network, with reference to Fig. 8 c, can use two two-way mixers to be connected with antenna port, obtain two sub-districts being divided into two, to realize dilatation.Wherein, the dividing mode of sub-district can have multiple, is example to divide right and left along antenna direction, and two horizontal radiation patterns profile altogether of two sub-districts that obtain after requiring to divide is identical with Fig. 9.The splitting directional diagram can't be accomplished ideal model usually fully, and can only progressively approach but in actual applications,, for example the directional diagram of a reality as shown in figure 10, both direction figure has certain overlay region at the interface place of centre, when the overlay region hour, less to capacity impact.At this moment, elevation radiation patytern is constant.
Because the area of coverage of antenna and original the same during dilatation, so the angle of declination of sensing of the level of antenna and vertical plane all need not be adjusted.The site, base station need not to increase simultaneously.Thereby can reduce the dilatation cost greatly, realize smooth expansion.
Embodiment two
When needing further dilatation based on Figure 10, then with reference to figure 8d and Fig. 8 e, at this moment, splitting also will take place in elevation radiation patytern, as shown in figure 11, specifically can use a two-way mixer to be connected with antenna port, obtain one and be divided into three sub-districts of three, perhaps, do not adopt mixer, obtain one and be divided into four sub-districts of four, to realize dilatation.The principle of other principles and embodiment one is similar, so no longer describe in detail.
In sum, realization of the present invention makes network both can carry out low capacity, the low-cost covering when initial, can realize very level and smooth dilatation under the situation that does not increase new site again.For example, as shown in figure 12, the technical scheme that adopts prior art to provide is not easy to the dilatation at the hot localised points area, adopts technical scheme provided by the invention then can realize smooth expansion very easily.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (8)
1. a Radio Network System is included in and is provided with antenna in the network, it is characterized in that the setting of described antenna comprises:
With cellular zone is that unit is provided with one group of antenna, and described one group of antenna is used for the corresponding one group of sub-district that covers cellular zone, and every road antenna is responsible for covering one of them sub-district; What described one group of antenna adopted is shaped aerial; Described shaped aerial is used for the coverage cell after definite initial coverage cell and the dilatation; Wherein, described shaped aerial comprises two-way input at least, and the input quantity that comprises of described shaped aerial is not less than the quantity of the coverage cell after the described dilatation; Described shaped aerial carries out dilatation in conjunction with power mixer or directional coupler or switch matrix.
2. system according to claim 1 is characterized in that, described shaped aerial is the shaped aerial that comprises four inputs.
3. system according to claim 2, it is characterized in that, described shaped aerial also is connected with and uses four the road or two-way power mixer, by four the road or two-way power mixer or switch matrix control shaped aerial obtain one tunnel, two road or No. three antennas of equivalence.
4. according to each described system of claim 1 to 3, it is characterized in that described one group of sub-district comprises: cellular zone is vertically divided the sub-district of acquisition and/or cellular zone laterally divided the sub-district of acquisition according to original antenna direction according to original antenna direction.
5. system according to claim 4 is characterized in that, the regional extent of each sub-district that comprises in described one group of sub-district big or small identical.
6. the implementation method of a wireless network dilatation is characterized in that, comprising:
A, the cellular cell in zone to be expanded is divided at least two separate overlay areas,
B, comprise the shaped aerial of two-way input at least, and the input quantity that comprises of described shaped aerial is not less than the quantity of described overlay area for each zone in described at least two separate overlay areas is provided with one respectively; Described shaped aerial is used for the coverage cell after definite initial coverage cell and the dilatation; Described shaped aerial carries out dilatation in conjunction with power mixer or directional coupler or switch matrix.
7. method according to claim 6 is characterized in that, described step B comprises:
B1, employing comprise the shaped aerials of four tunnel inputs as the antenna in described at least two separate overlay areas.
8. method according to claim 7 is characterized in that, described step B1 comprises:
When comprising two separate overlay areas, then utilize two two-way power mixers or switch matrix that the road is closed in the input of four tunnel in the described shaped aerial and import, the corresponding overlay area of every road input for two-way;
Perhaps,
When comprising three separate overlay areas, then utilize a two-way power mixer or switch matrix that the two-way in the input of four tunnel in the described shaped aerial is closed the input of Lu Weiyi road, obtain three tunnel inputs altogether, and the corresponding overlay area of every road input;
Perhaps,
When comprising four separate overlay areas, then directly utilize four tunnel inputs of described shaped aerial, the corresponding overlay area of every road input.
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| CN101359947B (en) * | 2007-07-30 | 2017-07-21 | 电信科学技术研究院 | The broadcast wave bean shaping method and device of multi-antenna array system |
| ES2708928T3 (en) * | 2013-06-28 | 2019-04-12 | Huawei Tech Co Ltd | Method of control of multimode base station and base station |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1438782A (en) * | 2002-02-14 | 2003-08-27 | 株式会社Ntt都科摩 | Antenna device of CDMA communication system base station and communication volume optimizing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1438782A (en) * | 2002-02-14 | 2003-08-27 | 株式会社Ntt都科摩 | Antenna device of CDMA communication system base station and communication volume optimizing method |
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