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A Study on Quality and Economical Analysis of B-WLL and Optical Transmission Systems for Substituting M/W Relay System  

Suh Kyoung-Whoan (강남대학교 전자공학과)
Choi Yong-Seok (한국전자통신연구원 전파자원연구팀)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.15, no.9, 2004 , pp. 809-819 More about this Journal
Abstract
In this paper, in order to exclude the expansion of M/W relay frequency or its new frequency assignment possibly, we analyzed a possibility of substituting M/W system by B-WLL or optical fiber network regarding service quality and economical points. To define the target of service quality, pre-condition and analysis method for the selected media have been derived to compare each other. E1 transmission with BER 10$^{-1}$ was chosen as a reference capacity, and service distance was calculated f3r the selected media as a function of availability. Also from the economical point we considered 3 systems such as optical fiber, M/W, and B-WLL based upon basic system structure, and analyzed them for various line configurations of fiber optic and B-WLL according to service period, system capacity, transmission distance, and data rate. It was confirmed that B-WLL can provide quality of service with 99.999 % availability within 1.6 km cell radius, and for optical fiber substitution, the leased fiber conduit on an electric pole is more economical than M/W system irrespective of service period, but in case of directly digging for underground conduit, it turned out ineffective regardless of cabling duct types.
Keywords
Microwave Radio Relay System; Optical Transmission System; B-WLL(Broadband-Wireless Local Loop); Availability;
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