Multi-Objective Planning and Optimization for WiMAX Multi-Hop Site Placement: Case Study in Nakhon Ratchasima City, Thailand
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Abstract
Wireless Interoperability for Microwave Access (WiMAX) is the interesting wireless broadband technology which has not ever been commercially operated in Thailand. This paper presents a simulation of planning and optimization for WiMAX multi-hop access network which deploys relay station (RS) to extend the coverage area of base station (BS) in a real area. Site placement is an important process for designing wireless access networks in order to optimize the investment cost and quality of services. The proposed multi-objective planning and optimization model aims to assign the optimal number and location of base stations and relay stations considering co-location sites with existing GSM mobile site. The city area of Nakhon Ratchasima, Thailand is chosen for being study area. Integer Linear Programming is used for formulating the planning and optimization model which aims to minimize the BSes and RSes installation cost and maximize the service coverage under signal strength guarantee constraints simultaneously. Numerical network planning results demonstrate that the proposed model can achieve overall service area with economical implementation cost. In addition, it can efficiently serve users in the target service area under the specified budget limitation.
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