CAJ | 학술논문

在通信确定性要求相对较高的系统中，若采用静态优先级调度策略，优先级低的节点可能长时间竞争不到总线，从而导致信息得不到发送。为了克服静态优先级的这种缺陷，可以提出一种新的动态优先级调度策略：以固定的周期遍历每个节点，并根据每个节点获得总线仲裁的频率来动态调整优先级。与此同时，每个节点调度的预值区间和阀值可根据需要灵活设定。通过Matlab对原始CANbus的静态优先级调度策略和本动态调度策略进行仿真对比研究，本策略的可行性即可获得验证。通信的确定性亦可得到保证。
재통신학정성요구상대교고적계통중，약채용정태우선급조도책략，우선급저적절점가능장시간경쟁불도총선，종이도치신식득불도발송。위료극복정태우선급적저충결함，가이제출일충신적동태우선급조도책략：이고정적주기편력매개절점，병근거매개절점획득총선중재적빈솔래동태조정우선급。여차동시，매개절점조도적예치구간화벌치가근거수요령활설정。통과Matlab대원시CANbus적정태우선급조도책략화본동태조도책략진행방진대비연구，본책략적가행성즉가획득험증。통신적학정성역가득도보증。
In the system requiring comparatively higher deterministic of communication, static priority scheduling algorithm may bring about that the nodes of lower priority fail to access to the bus within a long period,which leads to a result that some data couldn’ t be sent. To overcome this defect,a new dynamic priority scheduling strategy is put forward:Traverse each node periodically and then adjust the priority of each node dynamically as per its bus arbitrary frequency. In the meantime, the pre-value interval and threshold of each node could be flexibly specified as required. Once the emulational comparison be-tween the original CANbus static priority scheduling strategy and this new dynamic strategy is proceeded,the feasibility of the latter approach would be verified. The deterministic of communication would be guaranteed as well.