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정수계획법을 이용한 FlexRay 네트워크 메시지 스케줄링 기법
송무근(Moo Geun Song),이동익(Dongik Lee) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
In recent years, time triggered protocols have been developed for time critical applications such as x-by-wire system. In this respect, the FlexRay protocol is likely to become the de-facto standard for in-vehicle network. FlexRay protocol is consist of the static segment which follows a TDMA(Time Division Multiple Access) scheme, and the dynamic segment which adopts a FTDMA(Flexible Time Division Multiple Access) scheme. Each segment has dissimilar network utilization on the message transmission. In this paper, we study the scheduling problem of the message assignment to the static segment and dynamic segment. We define a network utilization by mean of performance index and derive an integer linear programming(ILP) problem that maximizes the network utilization.