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Soft Load Balancing Using the Load Sharing Over Heterogeneous Wireless Networks  

Son, Hyuk-Min (연세대학교 전기전자공학과 무선네트워크 연구실)
Lee, Sang-Hoon (연세대학교 전기전자공학과 무선네트워크 연구실)
Kim, Soo-Chang (한국전자통신연구원 이동통신연구단 개방형기지국연구팀)
Shin, Yeon-Seung (한국전자통신연구원 이동통신연구단 개방형기지국연구팀)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.33, no.7A, 2008 , pp. 757-767 More about this Journal
Abstract
Start Ongoing next generation networks are expected to be deployed over current existing networks, in the form of overlayed heterogeneous networks, in particular, in hot spot areas. Therefore, it will be necessary to develop an interworking technique such as load balancing, to achieve increased overall resource utilization in the various heterogeneous networks. In this paper, we present a new load balancing mechanism termed 'soft' load balancing where the IP(Internet Protocol) traffic of a user is divided into sub-traffic, each of which flows into a different access network. The terminology of soft load balancing involves the use of both load sharing and handover techniques. Through a numerical analysis, we obtain an optimal LBR (Load Balancing Ratio) for determining the volume of traffic delivered to each network over an overlayed multi-cell environment. Using the optimal LBR, a more reliable channel transmission can be achieved by reducing the outage probability efficiently for a given user traffic.
Keywords
Load balancing; load sharing; LBR; Soft load balancing; loading factor;
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