CN1564621A - Method of increasing capacity of cellular moble communication - Google Patents
Method of increasing capacity of cellular moble communication Download PDFInfo
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- CN1564621A CN1564621A CN 200410008789 CN200410008789A CN1564621A CN 1564621 A CN1564621 A CN 1564621A CN 200410008789 CN200410008789 CN 200410008789 CN 200410008789 A CN200410008789 A CN 200410008789A CN 1564621 A CN1564621 A CN 1564621A
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Abstract
The method includes following steps: first the cell with a radius of R is divided into internal cell and external cell based on the disance with the base station, the radius of the internal cell is r, the radius of external cell is R; the available channels are also divided into two parts that separately corresponds to the internal and external cell; the emission power range of internal and external channel is set based on radius of internal and external cell; the base station compares the emission power of user channel with the emission power range of internal and external channel, and determines the location of user, then distributes the relevant internal and external channels.
Description
Technical field
The present invention relates to a kind of method that increases the cellular mobile communication capacity, belong to wireless communication field.
Background technology
Along with the develop rapidly of radio communication, the user capacity problem becomes the matter of utmost importance of restriction mobile communication development gradually.First cell phone system that Bell Laboratory was succeeded in developing in early 1970s has solved the problem of frequency deficiency and user capacity.No matter current is all to use cellular technology in second generation mobile communication system or in 3-G (Generation Three mobile communication system), and the division of honeycomb as shown in Figure 1.Common N the sub-district of whole available channels of using is called cluster, and N/one of whole available channels is used in each sub-district.The size of N can be got different numerical value, for example 3 sub-district systems, 4 sub-district systems, 7 sub-district systems, 12 sub-district systems, 13 sub-district systems or the like.Figure 1 shows that 4 sub-district systems, 4 sub-district A, B, C, D that the black line frame gets up are 1 bunch, and wherein A, B, C, D use whole channels jointly, and identical channel is used in the sub-district that letter is identical.
There is this characteristic of path loss in cellular technology according to electromagnetic wave in spatial transmission, whole overlay area is divided into sub-district one by one, and the service of sub-district is provided by the base station in the sub-district.The part of available channel is used in each sub-district, and its neighbor cell then uses other different channel, in order to avoid interfere with each other.Just continue multiplexing these channels in the sub-district enough far away in distance, that path loss is enough big, this distance enough far away is called the channel multiplexing distance, as the L among Fig. 1.Re-use shared channel behind the multiplex distance of being separated by, the interference of interchannel just can be reduced to acceptable level.By this method channel has been carried out multiplexingly, under the constant situation of total channel number, enlarged user's capacity.
In same honeycomb, for the user near the base station, the power of uplink and downlink signal is all smaller, and the cochannel that other community users are produced disturbs also less; For the user away from the base station, the power of uplink and downlink signal is all bigger, and the cochannel that other community users are produced disturbs also bigger.
In cellular system,, when available channel is not enough in the sub-district, can take the method for cell splitting to increase power system capacity when number of users increases.Cell splitting is with the crowded method that is distinguished into littler sub-district for a short time, and each new sub-district is all set up base station and the corresponding reduction antenna height of oneself and reduced transmitter power.Schematic diagram is divided as shown in Figure 2 in the sub-district of this method, though this method can reduce multiplex distance, but will increase the base station equipment cost, when the user moves, also increase the switching times between user and base station, and also make the distribution of base station frequency of utilization become complicated more simultaneously.
Another kind of solution is a sectorization, as shown in Figure 3.Replace independent in a base station omnidirectional antenna by directional antenna, wherein a certain specific sector of each directional antenna radiation.Use directional antenna, the sub-district will receive only the interference of a part of sub-district in the co-channel cells.Can reduce the interference between the cochannel like this.But increase limited to capacity.
Above-mentioned prior art can be referring to " wireless communication principles and application ", the author: Theodore S.Rappaport Electronic Industry Press, 1999.
Summary of the invention
The objective of the invention is to propose a kind of method that increases mobile cellular, change the division form of cellular cell, with the capacity of further raising radio honeycomb communication system.
The method of the increase cellular mobile communication capacity that the present invention proposes comprises following each step:
(1) according to the distance of cellular base stations, be sub-district and outer sub-district in the cellular cell of R is divided into radius, the radius of interior sub-district is r, the radius of outer sub-district is R, 0＜r＜R;
(2) available channel with mobile communication system is divided into and the corresponding two parts in inside and outside sub-district;
(3) according to the radius size of inside and outside sub-district, set the transmitting power scope of inside and outside cell channel, make the transmitting power scope of the transmitting power scope of outer sub-district greater than interior sub-district;
(4) compare the transmitting power of subscriber channel in the base station with the transmitting power scope of the inside and outside cell channel of step (3) setting, judges the user position, and distribute corresponding inside and outside cell channel to the user.
The method of the increase cellular mobile communication capacity that the present invention proposes, be applied in the radio honeycomb communication system of N sub-district system (N＞1), because the user in the interior sub-district receives that the signal to noise ratio of signal is higher, interior sub-district is subjected to the interference of other co-channel cells less, so cellular division method of using the present invention to propose, channel multiplexing distance in can suitably shortening between the sub-district, the efficient of raising channel multiplexing increases user capacity.
Description of drawings
Fig. 1 is the cellular cell form schematic diagram of general cellular mobile communication.
Fig. 2 and Fig. 3 are that schematic diagram is divided in existing sub-district, have been distinguished into 3 littler sub-districts for a short time with one among Fig. 2, and the different sub-district of wherein different shade representatives is divided into 3 sectors with a microzonation among Fig. 3.
Fig. 4 is the schematic diagram that microzonation divides in one embodiment of the present of invention.
Embodiment
The method of the increase cellular mobile communication capacity that the present invention proposes, at first according to the distance of cellular base stations, be sub-district and outer sub-district in the cellular cell of R is divided into radius, the radius of interior sub-district is r, the radius of outer sub-district is R, 0＜r＜R; The available channel of mobile communication system is divided into and the corresponding two parts in inside and outside sub-district; According to the radius size of inside and outside sub-district, set the corresponding transmission power scope, make the transmitting power of the transmitting power of outer sub-district greater than interior sub-district; Comparing the transmitting power of subscriber channel in the base station with the transmitting power scope of the inside and outside cell channel of setting, judges the user position, and distribute corresponding inside and outside cell channel to the user.
The inventive method has proposed the notion of folded cellular cell on the basis of current cellular division.The far and near difference of base station is divided into two parts with radius for the R sub-district.Division methods is: with hexagonal mid point is mid point, r (0＜r＜R) be the hexagon of the length of side as the line of demarcation, will divide into outer sub-district and interior sub-district for a short time.All available channels also are divided into two parts, use in sub-district and the interior sub-district outside respectively, eliminated interfering with each other between the inside and outside cell channel in the same sub-district like this.This is because the user in the interior sub-district receives that the signal to noise ratio of signal is higher, interior sub-district is subjected to the interference of other co-channel cells less, and therefore the cellular division method of using the present invention to propose can suitably shorten the channel multiplexing distance between the interior sub-district, improve the efficient of channel multiplexing, increase user capacity.Do not make change for outer sub-district multiplexing.
Fig. 4 is the schematic diagram of an embodiment dividing of sub-district that the inventive method proposes, with current second generation mobile communication system (GSM) is example, if original system adopts 4 sub-district systems of prior art, and after adopting folded cellular cell of the present invention, 4 sub-district systems are still adopted in outer sub-district, 1 sub-district system is adopted in interior sub-district, and establishing inside and outside community user density is 1: 1, and then power system capacity can increase by 23%.Tong Xin base station all is based upon the compact district of mobile communication subscriber generally speaking, and therefore as if the user density that adds simultaneously in the imperial palace sub-district, even inside and outside community user density is 2: 1, this moment, power system capacity can be than original increase by 42.9%.If making inside and outside community user density is 3: 1, this moment, power system capacity can be than original increase by 60%.
In actual applications, the scope of cell channel and the corresponding transmitting power of outer cell channel at first determining according to the zones of different of interior sub-district and the covering of outer sub-district, the transmitting power of interior cell channel is defined within the specific limits, and the transmitting power of outer cell channel is on interior cell transmit power and be limited in another bigger value.The position at user place is judged according to channel transmitting power in the base station, and which kind of channel decision uses.Interior cell channel is at first distributed in the base station when the user begins to communicate by letter.When the power of interior cell channel can not satisfy proper communication, user sub-district outside is described, the base station switches to the bigger outer cell channel of power with the user.In communication process, when user emission power changed, base stations control switched on the corresponding channel.
When interior cell channel is not enough, can use the outer cell channel of this sub-district, can not exert an influence system.
When the mobile subscriber is in high-speed moving state and crosses the sub-district, can use outer cell channel always, alleviate the pressure of switching.
Claims (1)
1, a kind of method that increases the cellular mobile communication capacity is characterized in that this method comprises following each step:
(1) according to the distance of cellular base stations, be sub-district and outer sub-district in the cellular cell of R is divided into radius, the radius of interior sub-district is r, the radius of outer sub-district is R, 0＜r＜R;
(2) available channel with mobile communication system is divided into and the corresponding two parts in inside and outside sub-district;
(3) according to the radius size of inside and outside sub-district, set the transmitting power scope of inside and outside cell channel, make the transmitting power scope of the transmitting power scope of outer sub-district greater than interior sub-district;
(4) compare the transmitting power of subscriber channel in the base station with the transmitting power scope of the inside and outside cell channel of step (3) setting, judges the user position, and distribute corresponding inside and outside cell channel to the user.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410008789 CN1564621A (en) | 2004-03-19 | 2004-03-19 | Method of increasing capacity of cellular moble communication |
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| CN 200410008789 CN1564621A (en) | 2004-03-19 | 2004-03-19 | Method of increasing capacity of cellular moble communication |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101754233B (en) * | 2008-11-28 | 2012-10-24 | 京信通信系统（中国）有限公司 | Inter-network carrier channel supporting system |
| CN111132284A (en) * | 2019-12-05 | 2020-05-08 | 珠海格力电器股份有限公司 | Dynamic capacity allocation method for base station and base station |
| CN111901806A (en) * | 2020-08-03 | 2020-11-06 | 苏州韵之秋智能科技有限公司 | Capacity expansion method for 6G communication cellular mobile communication system |
-
2004
- 2004-03-19 CN CN 200410008789 patent/CN1564621A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101754233B (en) * | 2008-11-28 | 2012-10-24 | 京信通信系统（中国）有限公司 | Inter-network carrier channel supporting system |
| CN111132284A (en) * | 2019-12-05 | 2020-05-08 | 珠海格力电器股份有限公司 | Dynamic capacity allocation method for base station and base station |
| CN111132284B (en) * | 2019-12-05 | 2020-12-22 | 珠海格力电器股份有限公司 | Dynamic capacity allocation method for base station and base station |
| CN111901806A (en) * | 2020-08-03 | 2020-11-06 | 苏州韵之秋智能科技有限公司 | Capacity expansion method for 6G communication cellular mobile communication system |
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