A QoS-guaranteed fuzzy channel allocation controller for hierarchical cellular systems

Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 2000-09-01 DOI:10.1109/VETECF.1999.797374

Kuen-Rong Lo, Chung-Ju Chang, Cooper Chang, C. Shung

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引用次数: 14

Abstract

In this paper, we propose a fuzzy channel allocation controller (FCAC) for hierarchical cellular systems. FCAC is designed to contain base-station interface module, resource estimator, performance evaluator, and fuzzy channel allocation processor (FCAP). FCAP is a two-layer fuzzy logic controller that consists of a fuzzy admission threshold estimator in the first layer and a fuzzy channel allocator in the second layer. In the fuzzy admission threshold estimator, it chooses the handoff failure probability and the resource availability as input linguistic variables, and applies the Sugeno position-gradient type reasoning method to adaptively adjust threshold values for the fuzzy channel allocator. In the fuzzy channel allocator, it takes the mobility of users, the channel utilization, and the resource availability as input variables, and it intends to enhance the channel utilization by balancing utilization between macrocell and microcells.

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分级元胞系统的qos保证模糊信道分配控制器

本文提出了一种用于分层元胞系统的模糊信道分配控制器(FCAC)。FCAC被设计成包含基站接口模块、资源估计器、性能评估器和模糊信道分配处理器(FCAP)。FCAP是一种二层模糊逻辑控制器，由第一层模糊接纳阈值估计器和第二层模糊信道分配器组成。在模糊接纳阈值估计器中，选择切换失败概率和资源可用性作为输入语言变量，采用Sugeno位置梯度型推理方法自适应调整模糊信道分配器的阈值。在模糊信道分配器中，以用户的移动性、信道利用率和资源可用性为输入变量，通过平衡宏小区和微小区的利用率来提高信道利用率。

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Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)

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