CN1400829A - Method for implementing base station covering distance increment in mobile communication system - Google Patents
Method for implementing base station covering distance increment in mobile communication system Download PDFInfo
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- CN1400829A CN1400829A CN 01126353 CN01126353A CN1400829A CN 1400829 A CN1400829 A CN 1400829A CN 01126353 CN01126353 CN 01126353 CN 01126353 A CN01126353 A CN 01126353A CN 1400829 A CN1400829 A CN 1400829A
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- base station
- carrier frequency
- coverage distance
- mobile communication
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Abstract
A method of increasing the cover distance in the mobile communication system contains the following steps: adding channel assignment of a concentric circle and switching control module in the base station controller to make it support channel assignment and switching with different cover distances to broadcast channel and phoneme channel. If each carrier frequency of the multi-carrier base station exists different combined router loss, then low loss carrier frequency is to be the outer circle and high loss carrier is inner circle of the concentric circle and cover distance of the low loss, carrier frequency is determined to be the actual cover distance of the base station so the outer circle cover distance is larger than original one of the base station to realize the increase of the cover distance of the base station.
Description
(1) technical field
The present invention relates to mobile communication system, more specifically refer to, in mobile communication system, realize the method that base station coverage distance increases.
(2) background technology
In GSM (global system for mobile communications), CDMA (code division multiple access), WCDMA (Wideband Code Division Multiple Access (WCDMA)), CDMA2000 mobile communication system such as (CDMA 2000), the base station belongs to wireless portion, realizes that mobile communication system is by wireless transmission between air interface and the travelling carriage and controlled function.These base stations include but are not limited in base transceiver station (BTS) in global digital mobile communication system (GSM) system, broadband CDMA system (WCDMA) system base transceiver station (BTS) in the base station (NodeB) and broadband CDMA system (CDMA2000) system.
Generally speaking, the base station is made up of a plurality of carrier frequency unit.In order to reduce the quantity of feeder line between the antenna that is used to launch wireless signal and antenna and the carrier frequency unit, adopt mixer that the emission of multichannel carrier frequency unit is synthesized usually.Mixer adopts broadband coupling and cavity to close the road mode more.Because there is the cost height in Filter Combiner, do not support problem such as RF hopping, the mixer of broadband coupled modes uses more.Mixer exists insertion loss, two-in-one in theory wide-band coupler Insertion Loss 3dB.Overloading is closed the road frequently and is generally realized by multistage two-in-one wide-band coupler cascade.When a plurality of carrier frequency of base station configuration, the progression of wide-band coupler increases, and causes the insertion loss to increase synchronously, makes the antenna opening power output reduce, thereby has reduced the coverage distance of base station.
For same base station, the mode possibility that each road carrier frequency closes the road is different, might have different combination losses.Because generally speaking, the antenna opening power output of same each carrier frequency of website should be identical, so that channel continues and switches.Thereby, when the mixer loss of multichannel carrier frequency not simultaneously, the coverage distance of base station reality is determined by the maximum insertion carrier frequency generally speaking.
There is the method for using the concentric circles technology to improve the wireless network frequency repeat utilization ratio in industry at present, sees also the schematic diagram that figure l concentric circles technology covers.The concentric circles technology is by circle and cylindrical (annulus) two parts in base station overlay area is divided into, two parts adopt different frequency repeat utilization ratio (interior round reusability height is low to reduce system interference with raising power system capacity, cylindrical reusability), thereby obtain power system capacity and interference preferably.Concentric circles has realized same website is had the method for different coverage distance carrier frequency controls.
(3) summary of the invention
When the mixer loss of multichannel carrier frequency not simultaneously, utilize the concentric circles technology, make the coverage distance of base station reality insert the decision of loss carrier frequency by minimum.Thereby under the situation of the mixer mode not being made amendment, increase the coverage distance of base station.
The present invention adopts following technical scheme: utilize the concentric circles technology to realize that the method for base station coverage distance increase is based on increase concentrically ringed channel allocation and handover module in base station controller in mobile communication system, utilize each carrier frequency of multiple carrier frequency base station may have different mixer losses simultaneously, make the low coverage distance that decreases carrier frequency become the actual coverage distance of base station.This method may further comprise the steps:
A increases concentrically ringed channel allocation and switching controls module in base station controller, make the base station system support may have channel allocation and switching under the different coverage distance situations to broadcast channel and voice channel;
B, judge whether the combination loss of each carrier frequency of multiple carrier frequency base station is identical:
C if there is different mixer losses in each carrier frequency of multiple carrier frequency base station, utilizes the low-loss carrier frequency as concentrically ringed cylindrical, and the high carrier frequency that decreases is as circle in concentrically ringed;
D determine that the low coverage distance that decreases carrier frequency becomes the actual coverage distance of base station, thereby the coverage distance of cylindrical has been realized the increase of the coverage distance of base station greater than the coverage of original base station.
E, if the mixer loss of each carrier frequency of multiple carrier frequency base station is identical, then, this method lost efficacy.
When above-mentioned mobile communication system is global digital mobile communication system, when every sector 6 carrier frequency adopt the mixer combination of two-in-one mixer+four unification mixers, utilize 2 low-loss carrier frequency as concentrically ringed cylindrical, thereby increase the coverage distance of base station.
Adopt above-mentioned technical solution, when the mixer loss of each carrier frequency of multiple carrier frequency base station not simultaneously, utilize the concentric circles technology to realize that the coverage distance of base station determined by the low carrier frequency that decreases, thereby increase the coverage distance of base station.When low decrease carrier frequency close the road part when lacking the one-level mixer than other carrier frequency, the about 3dB of loss minimizing, the open ground can increase the coverage distance about 20% of base station more in theory.Simultaneously do not need mixer, antenna feeder configuration etc. is modified, have low cost, high-efficiency characteristics.
(4) description of drawings
The schematic diagram that Fig. 1 covers for existing concentric circles technology;
Fig. 2 utilizes the concentric circles technology to realize the schematic flow sheet that base station coverage distance increases;
Fig. 3 realizes the schematic diagram that base station coverage distance increases for utilizing the concentric circles technology in the global digital mobile communication system.
(5) embodiment
See also Fig. 2, in base station controller, increase concentrically ringed channel allocation and switching controls module, utilize each carrier frequency of multiple carrier frequency base station may have different mixer losses, make the low coverage distance that decreases carrier frequency become the actual coverage distance of base station.
This method may further comprise the steps:
1, in base station controller, increases concentrically ringed channel allocation and switching controls module, make the base station system support may have channel allocation and switching under the different coverage distance situations broadcast channel and voice channel
The use of concentric circles technology in channeling is ripe.Because having identical broadcast channel, inside and outside circle allow travelling carriage to insert; When channel allocation and inside and outside circle switched, the concentric circles technology was according to information such as the location of mobile station lead (TA value) of travelling carriage reporting base station and incoming levels, and the judgement travelling carriage is positioned to be justified or cylindrical, and then finishes channel allocation and switching.
2, if there is different mixer losses in each carrier frequency of multiple carrier frequency base station, utilize the low-loss carrier frequency as concentrically ringed cylindrical, the high carrier frequency that decreases is as circle in concentrically ringed
When having different mixer loss, decrease zone that carrier frequency covers as concentrically ringed cylindrical, to solve the covering problem of base station site far-end with low; The zone of height being decreased the carrier frequency covering is as circle in concentrically ringed, to solve the capacity problem of base station site near-end.
3, the coverage distance of cylindrical is greater than original base station coverage condition, thereby improves the coverage distance of base station
In prior art, the antenna opening power output of same each carrier frequency of website should be identical, and actual base station coverage distance is determined by the maximum insertion carrier frequency.
After adopting the concentric circles technology, utilize the low zone of carrier frequency covering of decreasing as concentrically ringed cylindrical.Owing to reduced the mixer loss, the coverage distance of cylindrical is greater than original base station coverage condition, thus the covering of raising base station.
4, if the mixer loss of each carrier frequency of multiple carrier frequency base station is identical, then can't increase the coverage distance of base station by the method
When the mixer loss of each carrier frequency of multiple carrier frequency base station is identical, can not be by the low coverage distance that decreases carrier frequency raising base station.In this case, can improve the covering of base station by the means that increase antenna feeder and change mixer mode.
See also Fig. 3, when above-mentioned mobile communication system is global digital mobile communication system, when every sector 6 carrier frequency adopt the mixer mode of two-in-one mixer+four unification mixers, utilize 2 low-loss carrier frequency as concentrically ringed cylindrical, thereby increase the coverage distance of base station.
When 6 carrier frequency base stations when to adopt the combination mixer be two-in-one mixer+four unification mixer modes, wherein 2 carrier frequency are only by two-in-one mixer, and other 4 carrier frequency are through four unification mixers.Because two-in-one mixer lacks the one-level mixer, the about less 3dB of loss than four unification mixers.By increasing the concentric circles technology, utilize 2 low-loss carrier frequency as concentrically ringed cylindrical, increase the effect that the antenna opening power output increases base station coverage distance thereby reach.
Claims (2)
1, a kind of method that realizes the base station coverage distance increase in mobile communication system is characterized in that, comprises the following steps:
In base station controller, increase concentrically ringed channel allocation and switching controls module, make the base station system support may have channel allocation and switching under the different coverage distance situations broadcast channel and voice channel;
If there is different mixer losses in each carrier frequency of multiple carrier frequency base station, utilize the low-loss carrier frequency as concentrically ringed cylindrical, the high carrier frequency that decreases is as circle in concentrically ringed;
Determine that the low coverage distance that decreases carrier frequency becomes the actual coverage distance of base station, thereby the coverage distance of cylindrical has been realized the increase of the coverage distance of base station greater than the coverage of original base station.
2, a kind of method that base station coverage distance increases that in mobile communication system, realizes as claimed in claim 1, it is characterized in that, when above-mentioned mobile communication system is global digital mobile communication system, and every sector is 6 carrier frequency, when adopting the mixer combination of two-in-one mixer+four unification mixers, then utilize 2 low-loss carrier frequency as concentrically ringed cylindrical, thereby increased the coverage distance of base station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011263539A CN1172548C (en) | 2001-07-27 | 2001-07-27 | Method for implementing base station covering distance increment in mobile communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011263539A CN1172548C (en) | 2001-07-27 | 2001-07-27 | Method for implementing base station covering distance increment in mobile communication system |
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| Publication Number | Publication Date |
|---|---|
| CN1400829A true CN1400829A (en) | 2003-03-05 |
| CN1172548C CN1172548C (en) | 2004-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB011263539A Expired - Lifetime CN1172548C (en) | 2001-07-27 | 2001-07-27 | Method for implementing base station covering distance increment in mobile communication system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101719862B (en) * | 2008-10-09 | 2012-05-23 | 中兴通讯股份有限公司 | Method and device for acquiring uplink/downlink wireless covered space in LTE system |
-
2001
- 2001-07-27 CN CNB011263539A patent/CN1172548C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101719862B (en) * | 2008-10-09 | 2012-05-23 | 中兴通讯股份有限公司 | Method and device for acquiring uplink/downlink wireless covered space in LTE system |
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| CN1172548C (en) | 2004-10-20 |
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