Towards Reliable Wireless Industrial Communication With Real-Time Guarantees

Predictable real-time communications with improved reliability for IEEE 802.15.4 based industrial networks

“…The analytical framework derived in [2] by the authors, contains both a timing and a real-time analysis for ad mission control in a truncated retransmission protocol. Real-time analysis based on EDF theory for scheduling periodic tasks on a uniprocessor is well-known [3] and uses a two-step method to check the feasibility of a real time task set: a utilization check and a workload check.…”

“…This method has also been mapped to a networking con text in [4]. However, the approach of letting the real time analysis dictate the admission control not only of periodic messages, but also of potential retransmissions of failed packets within messages generated by accepted traffic flows makes [2] quite unique. Prior work in real time communications often provides only statistical per formance without deadline guarantees, e.g.…”

“…Compared to the framework in [2], the introduction of the 802. 15.4 network makes cer tain adaptations to the analysis necessary.…”

“…Uhlemann is partly funded by the Swedish Governmental Agency for Innovation Systems, Vinnova, through the VINNMER program, www.vinnova.se 978-1-4244-5461-7/10/$26.00 ©2010 IEEE In earlier work [2] we developed a theoretical frame work for reliable real-time traffic over a wireless link, reducing the message error rate (MER) through retrans missions, while still being able to guarantee real-time de lay bounds. This paper extends that framework to a sin gle-hop network with a logical star topology using 802.…”

Simulation Study of Topological Structures and Node Coordinations for Deterministic WSN with TSCH

“…Communication bus technologies were introduced in 1990s which made it possible to remove the bundles of cables with few shared bus cables. Then came the introduction of wireless communication systems, with which cables could be removed completely [6]. These implementations gained popularity with the Industrial environment being integrated with the Internet world these days, to meet the growing demands of process efficiencies and the financial objectives [4].…”