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Asymptotic Analysis of Transmission Capacities for Overlaid Spread-Spectrum Wireless Networks

文献类型： 外文期刊

作者： Wu, Huarui 1 ; Li, Di 2 ; Yin, Changchuan 2 ;

作者机构： 1.Natl Engn Res Ctr Informat Technol Agr, Dept Comp Applicat, Beijing 100097, Peoples R China

2.Beijing Univ Posts & Telecommun, Minist Educ, Key Lab Univ Wireless Commun, Beijing 100876, Peoples R China

关键词： transmission capacity; ad hoc network; spread spectrum; stochastic geometry

期刊名称：CHINA COMMUNICATIONS （ 影响因子：2.688； 五年影响因子：1.981 ）

ISSN： 1673-5447

年卷期： 2010 年 7 卷 3 期

页码：

收录情况： SCI

摘要： We study the transmission capacities of two coexisting spread-spectrum wireless networks (a primary network vs. a secondary network) that operate in the same geographic region and share the same spectrum. We define transmission capacity as the product among the density of transmissions, the transmission rate, and the successful transmission probability. The primary (PR) network has a higher priority to access the spectrum without particular considerations for the secondary (SR) network, while the SR network limits its interference to the PR network by carefully controlling the density of its transmitters. Considering two types of spread-spectrum transmission schemes (FH-CDMA and DS-CDMA) and the channel inversion power control mechanism, we quantify the transmission capacities for these two networks based on asymptotic analysis. Our results show that if the PR network permits a small increase of its outage probability, the sum transmission capacities of the two networks (i.e., the overall spectrum efficiency per unit area) will be boosted significantly over that of a single network.

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