可调度性保证的TTP总线能量有效优化方法  

An Energy Efficiency Optimization Method for TTP Bus with Guaranteed Schedulability

作　　者：赵天鹤 熊华钢[2] 程子敬[3] 李峭[2] ZHAO Tian-he;XIONG Hua-gang;CHENG Zi-jing;LI Qiao(Beihang University, a. School of Large Aircraft;b. School of Electronic Information Engineering, Beijing 100191, Chin;2. National Key Laboratory of Beijing Satellite Information Engineering Institute, Beijing 100080, Chin)

机构地区：[1]北京航空航天大学大型飞机高级人才班,北京100191 [2]北京航空航天大学电子信息工程学院,北京100191 [3]北京卫星信息工程研究所国家重点实验室,北京100080

出　　处：《电光与控制》2018年第6期72-77,101,共7页Electronics Optics & Control

基　　金：国家自然科学基金(91538202,61073012)

摘　　要：在航空电子互连的实际应用中,时间触发协议(TTP)总线存在着一定量的空闲时段,随着节能环保的"绿色航电"理念渗入到航电系统设计的各个层面,提出一种以能量有效为优化目标的消息调度表生成方法,在保证可调度性的前提下利用空闲时间资源合理降低信息码元速率。通过建立静态分片(SP)的消息分配模型,对TTP总线的TDMA周期的调度裕量进行组合优化分配,用以降低部分分片的码元速率,达到节能的效果。构造消息集合案例,设定其中的消息分属于不同节点且具有多种周期和长度参数。案例仿真计算表明,与未采用SP和降频优化的常规方法相比,所提方法不仅可以保证消息的可调度性,而且有效地降低了传输能耗。There is a certain amount of idle time in the Time Triggered Protocol（ TTP） bus in practical applications of avionics interconnection. With the energy-saving ＂green avionics＂concept penetrating into all aspects of the avionics system design,a message-scheduling table generation method is presented,in which energy efficiency is proposed as the optimization objective. On the premise of ensuring schedulability,the idle time resource is used to reduce the information symbol rate reasonably. By building a message allocation model of Static Packing（ SP）,the scheduling slack of the TDMA period of the TTP bus is optimized and allocated to each node to reduce the symbol rate of some of the packs,so as to save energy. A case of the message set is constructed in which messages belong to different nodes and have a variety of periods and length parameters. Case studies show that,compared with the conventional methods not using SP and frequency reduction optimization,this method can not only guarantee the schedulability of messages,but also effectively reduce the energy consumption in transmission.

关 键 词：航空电子综合 实时系统 能量有效 TTP总线 静态分片 

分 类 号：TP393.03[自动化与计算机技术—计算机应用技术]