Z-MAC: a Hybrid MAC for Wireless Sensor Networks

DMCA

Z-MAC: a Hybrid MAC for Wireless Sensor Networks (2005)

Cached

Download Links

Other Repositories/Bibliography

DBLP

by Ajit Warrier , Jeongki Min , Injong Rhee

Citations:

293 - 7 self

BibTeX

@INPROCEEDINGS{Warrier05z-mac:a,
    author = {Ajit Warrier and Jeongki Min and Injong Rhee},
    title = {Z-MAC: a Hybrid MAC for Wireless Sensor Networks},
    booktitle = {},
    year = {2005},
    pages = {90--101},
    publisher = {ACM Press}
}

OpenURL

Abstract

Z-MAC is a hybrid MAC protocol for wireless sensor networks. It combines the strengths of TDMA and CSMA while offsetting their weaknesses. Nodes are assigned time slots using a distributed implementation of RAND. Unlike TDMA where a node is allowed to transmit only during its own assigned slots, a node can transmit in both its own time slots and slots assigned to other nodes. Owners of the current time slot always have priority in accessing the channel over non-owners. Therefore, under low contention where not all owners have data to send, non-owners can “steal ” time slots from owners. This has the effect of switching between CSMA and TDMA depending on contention. Z-MAC is robust to topology changes and clock synchronization errors; in the worst case its performance falls back to that of CSMA. We implemented Z-MAC in TinyOS and evaluated its channel utilization, energy, latency and fairness over single-hop, twohop and multi-hop sensor network topologies constructed using Mica2. The result shows that Z-MAC has remarkably better data throughput than existing sensor MAC protocols while consuming comparable energy (over three times better throughput under high contention).

Keyphrases

wireless sensor network hybrid mac time slot assigned slot hybrid mac protocol high contention distributed implementation multi-hop sensor network topology sensor mac protocol low contention assigned time slot channel utilization comparable energy clock synchronization error data throughput current time slot

DMCA