Distributed channel assignment algorithm based on simulated annealing for uncoordinated OSA-enabled WLANs

2011 6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications (CROWNCOM) Pub Date : 2011-06-01 DOI:10.4108/ICST.CROWNCOM.2011.245906

Francisco Novillo, R. Ferrús

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引用次数: 3

Abstract

A promising approach to alleviate ISM band congestion problems in highly dense WLAN scenarios consists of exploiting opportunistic spectrum access (OSA) to underutilized bands under a primary-secondary model. This paper develops a distributed channel assignment algorithm valid for uncoordinated WLAN deployments where access points do not follow any specific planning and they could belong to different administrative domains. Unlike existing channel assignment schemes proposed for legacy WLANs, channel assignment mechanisms for OSA-enabled WLAN should address two distinguishing issues: channel prioritization and spectrum heterogeneity. Over such a basis, this paper develops and assesses the performance of a distributed channel assignment algorithm that is able to exploit both channel prioritization and spectrum heterogeneity concepts. In particular, the algorithm is based on a distributed adaptation of the simulated annealing metaheuristic algorithm commonly used in global optimization problems.

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基于模拟退火的非协调osa无线局域网分布式信道分配算法

在高密度WLAN场景中，缓解ISM频段拥塞问题的一种有前途的方法是在主从模型下利用机会频谱接入(OSA)来充分利用未充分利用的频段。本文开发了一种分布式信道分配算法，适用于接入点不遵循任何特定规划且可能属于不同管理域的非协调WLAN部署。与针对传统WLAN提出的现有信道分配方案不同，支持osa的WLAN的信道分配机制应解决两个不同的问题:信道优先级和频谱异质性。在此基础上，本文开发并评估了分布式信道分配算法的性能，该算法能够利用信道优先级和频谱异质性概念。特别是，该算法基于全局优化问题中常用的模拟退火元启发式算法的分布式自适应。

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2011 6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications (CROWNCOM)

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