Title :
Cross-Layer Analysis of Error Control in Wireless Sensor Networks
Author :
Vuran, Mehmet C. ; Akyildiz, Ian F.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA
Abstract :
Severe energy constraints and hence the low power communication requirements amplify the significance of the energy efficient and preferably cross-layer error control mechanisms in wireless sensor networks (WSN). In this paper, a cross-layer methodology for the analysis of error control schemes in WSNs is presented such that the effects of multi-hop routing and the broadcast nature of the wireless channel are investigated. More specifically, the cross-layer effects of routing, medium access and physical layers are considered. This analysis enables a comprehensive comparison of forward error correction (FEC) and automatic repeat request (ARQ) in WSNs. FEC schemes improve the error resiliency compared to ARQ. In a multi-hop network, this improvement can be exploited by reducing the transmit power (transmit power control) or by constructing longer hops (hop length extension), which can be achieved through channel-aware routing protocols. The results of our analysis reveal that for certain FEC codes, the hop length extension decreases both the energy consumption and the end-to-end latency subject to a target PER compared to ARQ. Thus, FEC codes can be regarded as an important candidate for delay sensitive traffic in WSNs. On the other hand, transmit power control results in significant savings in energy consumption at the cost of increased latency. Moreover, the cases where ARQ outperforms FEC codes are indicated for various end-to-end distance and target PER values
Keywords :
access protocols; automatic repeat request; error correction codes; forward error correction; power control; routing protocols; telecommunication congestion control; wireless channels; wireless sensor networks; ARQ; FEC codes; automatic repeat request; cross-layer error control mechanisms; end-to-end distance; end-to-end latency; energy constraints; energy consumption; forward error correction; hop length extension; medium access; multihop routing effects; physical layers; power communication requirements; routing protocols; transmit power control; wireless channel; wireless sensor networks; Automatic repeat request; Delay; Energy consumption; Energy efficiency; Error analysis; Error correction; Forward error correction; Power control; Routing; Wireless sensor networks;
Conference_Titel :
Sensor and Ad Hoc Communications and Networks, 2006. SECON '06. 2006 3rd Annual IEEE Communications Society on
Conference_Location :
Reston, VA
Print_ISBN :
1-4244-0626-9
DOI :
10.1109/SAHCN.2006.288515