Title :
Soft Real-Time Chains for Multi-Hop Wireless Ad-Hoc Networks
Author :
Bui, Bach D. ; Pellizzoni, Rodolfo ; Caccamo, Marco ; Cheah, Chin F. ; Tzakis, Andrew
Author_Institution :
Dept. of Comput. Sci., Illinois Univ., Urbana, IL
Abstract :
Prioritized MAC protocols are needed to support soft real-time communication in wireless networks. In this paper, we introduce real-time chain, a new prioritized MAC protocol to support soft real-time data flows in multi-hop wireless ad-hoc networks. By avoiding packet collisions and limiting the effect of priority inversions, real-time chain is able to provide soft real-time and bandwidth guarantees. Furthermore, the use of multiple channels enables high spatial reuse and transmission rates. Finally, our approach can be integrated with a slightly modified version of the IEEE 802.15.4 standard. The protocol has been fully implemented on Crossbow MICAz hardware and its performance has been validated with a large set of both indoor and outdoor experiments
Keywords :
access protocols; ad hoc networks; personal area networks; Crossbow MICAz hardware; IEEE 802.15.4 standard; MAC protocols; multi-hop wireless ad-hoc networks; soft real-time chains; Ad hoc networks; Bandwidth; Control systems; Media Access Protocol; Monitoring; Spread spectrum communication; Streaming media; Surveillance; Wireless application protocol; Wireless sensor networks;
Conference_Titel :
Real Time and Embedded Technology and Applications Symposium, 2007. RTAS '07. 13th IEEE
Conference_Location :
Bellevue, WA
Print_ISBN :
0-7695-2800-7
DOI :
10.1109/RTAS.2007.34
