Routing in Mobile Cyber-Physical Systems

• Type: Chapter or Part of a Book
• Date: 2017

Authors

Luis Oliveira (Author) Other; Luis Almeida (Author) FEUP

Book

Title: Cyber-Physical Systems: A Reference

Pages: 1-27

ISBN: 9783642544774

Electronic ISBN: 9783642544774

Other information

Authenticus ID: P-00Q-FXS

DOI: 10.1007/978-3-642-54477-4_3-1

Abstract (EN): Teams of mobile autonomous agents are a class of Cyber-Physical Systems that allow relocating sensors and actuators thus named Mobile-Cyber-Physical Systems (M-CPS). For the sake of topology flexibility, these systems frequently use ad hoc wireless RF communications with WiFi being the preferred technology. In this scope, we consider a WiFi-based communication protocol for M-CPS that sets up a global TDMA framework, resilient to topology changes, and we focus on routing information across a dynamic mesh. In particular, we look into multihop one-to-one communication and compare the usual forwarding approach, in which each node buffers other nodes’ traffic and forwards it in its own slot, with two novel approaches with immediate packet forwarding. One of these approaches enforces full isolation among flows so that flows originating from one node are only transmitted in the slot owned by that node, thus eliminating mutual interference across nodes. The results exhibit a significant reduction in the variations of the network delay and its dependence on topology. We also present a timing analysis with low pessimism for worst-case end-to-end delay in the full isolation case and validate the analysis with simulations using OMNeTCC. This novel forwarding method exhibits more stable timing behavior and lower latencies in the general case.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 27