Title :
An enhanced high-rate WPAN MAC for mesh networks with dynamic bandwidth management
Author :
Chen, Xi ; Lu, Jianhua ; Zhou, Zucheng
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing
Abstract :
A mesh-enabled WPAN (mesh-WPAN) built on the standard IEEE 802.15.3 MAC allocates channel time node by node along a route. This allocation causes unnecessary packet delays, which is not desirable for multimedia-dominating scenarios. Also, the variability of wireless link may result in relaying nodes´ starvation or buffer overflow. In this work an enhanced MAC protocol for high-rate mesh-WPAN named group relay and token solicitation (GRATS) is proposed. Group relay enables dynamic channel time sharing among the nodes along a route. Token solicitation allows for temporarily adjusting the number of packets in a group. Both mathematical analysis and simulation results show that the GRATS not only solves the relaying nodes´ starvation and buffer overflow problems, but also reduces average packet delay noticeably. Simulation results also show that the GRATS outperforms the IEEE 802.15.3 MAC significantly for delay bounded VBR video traffic in terms of job failure rate
Keywords :
access protocols; channel allocation; mathematical analysis; personal area networks; radio links; telecommunication network management; telecommunication network routing; IEEE 802.15.3 MAC standard; average packet delay; buffer overflow; buffer overflow problems; channel allocation; dynamic bandwidth management; dynamic channel time sharing; group relay and token solicitation; job failure rate; mathematical analysis; mesh networks; mesh-enabled WPAN; multimedia-dominating scenarios; video traffic; wireless link; Analytical models; Bandwidth; Buffer overflow; Delay; Mathematical analysis; Media Access Protocol; Mesh networks; Relays; Time sharing computer systems; Traffic control;
Conference_Titel :
Global Telecommunications Conference, 2005. GLOBECOM '05. IEEE
Conference_Location :
St. Louis, MO
Print_ISBN :
0-7803-9414-3
DOI :
10.1109/GLOCOM.2005.1578406