車用網路是車用電子是發展中很重要的一部分,現今較廣為人知的車用網路有LIN、CAN、FlexRay、MOST等,其中FlexRay以高可靠度和高傳輸速度著稱,並具有TDMA的通訊機制。FlexRay以靜態區段規劃為重要資料的固定傳遞時段,如何讓網路中各個節點在靜態區段能夠有效率的使用傳遞時段,是本論文的研究重點。現今還沒有關於評估靜態區段效能的有效方法,本論文提出負載資料規劃改善方法,改善基本裝載資料的方法,提升使用率,並藉由負載資料規劃的改善,預先評估適合系統配置的負載資料區域,達到較佳的使用率。我們建立負載資料規劃改善方法的分析情境,也藉此探討拓樸配置對系統造成的影響,最後再使用Matlab來進行模擬和驗證負載資料規劃改善方法,並證明負載資料規劃改善方法的可行性和重要性。
Vehicle network is an important role in the automotive electronic development. Well-known vehicle networks are LIN, CAN, FlexRay, and MOST. FlexRay is known as high reliability, high speed, and time division multiple access (TDMA) communication system. FlexRay transfers the fixed-time and important message by the static time segment. Our thesis proposes a methodology to make each node can efficiently transfers message by static time segment in the network. Nowadays, there is no suitable method to evaluate the utilization of the static segment, so we propose the evaluative measurement. And we propose the payload planning improved method that pre-calculate the appropriate payload number in the static segment. We set up analytical environments and the network topology configuration. We simulate and verify the payload planning improved method by Matlab, which shows the better result to prove the method’s importance and feasibility.