CN101977387A - Method for determining distance between relay and base station in LTE-Advanced relay network - Google Patents
Method for determining distance between relay and base station in LTE-Advanced relay network Download PDFInfo
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- CN101977387A CN101977387A CN2010105177550A CN201010517755A CN101977387A CN 101977387 A CN101977387 A CN 101977387A CN 2010105177550 A CN2010105177550 A CN 2010105177550A CN 201010517755 A CN201010517755 A CN 201010517755A CN 101977387 A CN101977387 A CN 101977387A
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Abstract
The invention relates to a method for determining the distance between a relay and a base station in an LTE-Advanced relay network. The relay in the LTE-Advanced relay network serves as an independent wireless access point to realize frequency reuse with a cell base station, and the cell coverage and throughput performance are improved and stronger in-cell interference is introduced. Under the condition of simultaneous inter-cell interference and in-cell interference, the relay position is sensitive to the influence of the inter-cell interference and in-cell interference. By jointly considering the distance between the relay and the base station and cost/performance optimization, the aim of maximizing the system gain brought by the relay through the optimal deploy distance of the relay position is fulfilled.
Description
Technical field
The present invention relates to a kind of method that in the LTE-Advanced junction network, determines the distance between relaying and base station.
Background technology
Along with popularizing and the increase of requirements of mobile subscribers of multimedia application, the research of wireless relay (wirelessrelay) in the mobile network has obtained huge development recently.Wireless relay also is important candidate technologies in LTE-Advanced (LTE-A) system, can effectively improve transmission rate, increases cell coverage area, can better support the user mobility management simultaneously.The LTE-A system has proposed descending peak rate 1Gbps, the performance requirement of up peak rate 100Mbps, can only be present in higher frequency band for the bandwidth spectrum of this capacity of acquisition, all very big in high like this frequency range path loss and penetration loss, very difficult realization covers preferably.The introducing of relaying can be good at addressing this problem.
When the concern relaying brought the performance boost of sub-district, it also was the target that LTE-A honeycomb junction network need be considered that the relaying of cost optimization is disposed.All the more so for Virtual network operator.Compare with the base station, because relaying has smaller volume, lower transmitted power and processing power, its equipment cost and addressing cost all are far smaller than the base station.But relaying must bring extra cost expense as the new extra access point in sub-district.Therefore the combined optimization arrangement of base station and relaying is a very important problem.Concerning Virtual network operator, in order to obtain better input-output ratio, the arrangement of relaying in the sub-district need obtain detail analysis, and especially this point seems and is even more important when cost is limited.
In the relaying deployment issue, the distance between relaying and the base station (we are referred to as the relaying radius) can play significant effects to the estate performance quality.The introducing of relaying has been brought in presence of intercell interference and the sub-district for the sub-district simultaneously and disturbs.If relaying is too near from cell edge, then be to causing serious interference in adjacent sub-district; If relaying is too near from the cell centre base station, then can cause in the sub-district disturb excessive.
Summary of the invention
The technical problem to be solved in the present invention is, unites cost restriction and the estate performance demand of considering Virtual network operator, is that the relaying radius is examined or check to the distance between relaying and base station, maximizes the system gain that relaying brings.
In order to address the above problem, the invention provides a kind of in the LTE-Advanced junction network distance between decision relaying and base station be the method for relaying radius.New method is united cost restriction and the estate performance demand of considering Virtual network operator, by the optimum relaying radius of optimization unit cost gain decision, comprising:
Set up a plurality of relayings be evenly distributed on the equidistant ring in base station on the sub-district basic model;
Set up the relational expression between cost and the cell capacity;
Utilize the change of relaying radius to influence interference model, thereby influence cell capacity, finally search out optimum relaying radius.
Above-mentioned method, wherein, cell capacity is not only relevant with presence of intercell interference, and relevant with interference in the sub-district.
Above-mentioned method wherein, also comprises:
The user distribution that inserts by relaying is near the relaying focus, and the user who inserts by the base station is evenly distributed in the sub-district.Each terminal has two antennas in following provisional capital in the sub-district, guarantees the transmission plan of MIMO 2*2.
Above-mentioned method, wherein, the gain of the cell capacity of normalization cost is a final goal, by cost and performance are connected, obtains optimum compromise gain.
Above-mentioned method, wherein, distance is that the relaying radius obtains in the process of optimization unit cost gain between optimum relaying and base station.
Above-mentioned method wherein, also comprises:
The not optimum simultaneously relaying radius of sub-district relaying number may be different, and the relaying number finally influences sub-district unit cost gain by the influence to interference model.
As can be seen, the embodiment of the invention has following beneficial effect:
The method of the embodiment of the invention, utilize of the influence of the formula examination relaying radius of unit cost gain to sub-district relaying performance gain, unite the relation of having considered restriction of Virtual network operator cost and estate performance demand, the relaying radius problem of Virtual network operator being carried out sub-district relaying deployment has provided the solution that the optimization unit cost gains.In case sub-district relaying number determines that optimum sub-district relaying radius also can be determined thereupon.
Description of drawings
Fig. 1 is illustrative to be sub-district basic framework model (is example with 6 relayings);
Fig. 2 is illustrative to be the basic mode in sub-district;
Fig. 3 is illustrative to be the sub-district frame structure;
Fig. 4 is illustrative when being different relaying number, changes the different unit cost gain curve figure that the relaying radius obtains.
Embodiment
Determine frame structure, interference model and the mode of sub-district according to the cell environment of reality.Virtual network operator can determine to use the relaying of which kind of specification to carry out the deployment of architecture.
At first, gain by the cell capacity under unit cost gain formula η=C/B/ (1+nr) unit of account cost.Wherein η is the cost efficiency factor, and C is a cell capacity, and B is a system bandwidth, and n is a sub-district relaying number, and r is the cost of each relaying and the ratio of base station cost.
The method of the embodiment of the invention, by changing the relaying radius, cell capacity C finally influences the cost efficiency factor owing to the difference of interference model causes changing.Virtual network operator by the unit cost gain formula, can be considered two kinds of different Business Information and IT Solution Mgmt Dep arranging methods based on cost budgeting according to the method for the embodiment of the invention:
One, if the resulting cost budget is not limited, according to Fig. 4, Virtual network operator can consider to adopt optimum relaying radius and relaying number to maximize the unit cost factor;
Its two, if the resulting cost budgetary constraint according to Fig. 4, based on the relaying number that can dispose at present (be subjected to cost restriction), adopts time dominant strategy decision relaying radius to realize the unit cost factor of suboptimum.
Claims (4)
1. method that is used for the distance between LTE-Advanced junction network decision relaying and base station, it is characterized in that: in the LTE-Advanced trunk network, relaying and cell base station carry out frequency reuse, and the sub-district exists in the sub-district simultaneously disturbs and presence of intercell interference.Between relaying and base station distance determining to disturb the sub-district in and presence of intercell interference influence size, optimal distance is trading off of two kinds of interference of realization.The performance gain that the optimum deployment distance of relaying in the sub-district and between the base station brought by the realization unit cost maximizes and obtains.
2. according to the method described in the claim 1, it is characterized in that the frequency re-use factor of whole cellular system is 1, the shared frequency band in relaying and base station.
3. according to each described method in the claim 1 to 2, it is characterized in that choosing of relaying deployed position can not cause interference too strong in the sub-district, can not cause the too strong interference in minizone.
4. according to each described method in the claim 1 to 3, it is characterized in that, optimum between relaying and base station is disposed distance to be connected with cost/best performanceization, different relay arranging methods makes that the cell capacity gain under the unit cost is different, and optimum relaying is disposed apart from being determined by the unit cost maximum capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105177550A CN101977387A (en) | 2010-10-25 | 2010-10-25 | Method for determining distance between relay and base station in LTE-Advanced relay network |
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| CN2010105177550A CN101977387A (en) | 2010-10-25 | 2010-10-25 | Method for determining distance between relay and base station in LTE-Advanced relay network |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103096335A (en) * | 2012-12-26 | 2013-05-08 | 陈宏滨 | Optimization method of spectrum efficiency and energy efficiency of wireless communication system |
| CN104066099A (en) * | 2013-03-19 | 2014-09-24 | 北京邮电大学 | Wireless communication network relay deployment method |
| CN104125581A (en) * | 2013-04-26 | 2014-10-29 | 华为技术有限公司 | Coverage and capacity joint optimization method, device and system thereof |
| CN112782727A (en) * | 2020-11-20 | 2021-05-11 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Station distribution design method based on observation weak area compensation |
-
2010
- 2010-10-25 CN CN2010105177550A patent/CN101977387A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103096335A (en) * | 2012-12-26 | 2013-05-08 | 陈宏滨 | Optimization method of spectrum efficiency and energy efficiency of wireless communication system |
| CN103096335B (en) * | 2012-12-26 | 2016-01-20 | 陈宏滨 | The optimization method of a kind of wireless communication system spectrum efficiency and energy efficiency |
| CN104066099A (en) * | 2013-03-19 | 2014-09-24 | 北京邮电大学 | Wireless communication network relay deployment method |
| CN104066099B (en) * | 2013-03-19 | 2017-10-10 | 北京邮电大学 | A kind of relaying dispositions method of wireless communication networks |
| CN104125581A (en) * | 2013-04-26 | 2014-10-29 | 华为技术有限公司 | Coverage and capacity joint optimization method, device and system thereof |
| CN104125581B (en) * | 2013-04-26 | 2018-03-16 | 华为技术有限公司 | Covering and capacity combined optimization method and device, system |
| CN112782727A (en) * | 2020-11-20 | 2021-05-11 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Station distribution design method based on observation weak area compensation |
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| C06 | Publication | ||
| PB01 | Publication | ||
| DD01 | Delivery of document by public notice |
Addressee: University of Electronic Science and Technology of China Document name: Notification of Passing Preliminary Examination of the Application for Invention |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110216 |