基于DCPS的分布式实时通信体系结构分析及时延测试

针对分布式实时系统对结点间通信延迟的确定性要求,探讨了基于DCPS通信模型的分布式实时通信体系结构.分析了联邦式、分布式和集中式的DCPS通信模型体系结构设计策略及其对分布式实时系统通信延迟、可靠性及可扩展性的影响,通过定义实时通信测试主题,设计外部应用接口,提出了一种分布式实时系统的通信延迟测试方法.结果表明,在有效满足分布式实时系统对网络通信延迟确定性要求的前提下,以分布式体系结构设计策略实现的DCPS通信模型具有更小的通信延迟及抖动.

Structure analysis and delay test for DCPS based distributed real-time communication system

Aiming at the deterministic requirement of communication delay among different nodes in the distributed real time system, the structure of DCPS based distributed real time communication system was investigated. The federated, decentralized and centralized structure design strategies for the DCPS communication model and their effects on the communication delay, scalability and reliability of distributed real time system were analyzed. Through defining the test topics for real time communication and designing the external application interfaces, a communication delay test method for the distributed real time system was proposed. The results show that under the premise of fulfilling the deterministic requirement of communication delay in the distributed real time system, the DCPS communication model realized with the decentralized architecture design strategy has smaller communication delay and jitter.