DCMA: A Label-Switching MAC for efficient packet forwarding in multi-hop wireless networks
This paper addresses the problem of efficient packet forwarding in a multihop, wireless "mesh" network. We present an efficient interface contained forwarding (ICF) architecture for a "wireless router," i.e., a forwarding node with a single wireless network interface card (NIC) in a multihop wireless network that allows a packet to be forwarded entirely within the NIC of the forwarding node without requiring per-packet intervention by the node's CPU. To effectively forward packets in a pipelined fashion without incurring the 802.11-related overheads of multiple independent channel accesses, we specify a slightly modified version of the 802.11 MAC, called data driven cut-through multiple access (DCMA) that uses multiprotocol label switching (MPLS)-like labels in the control packets, in conjunction with a combined ACK/RTS packet, to reduce 802.11 channel access latencies. Our proposed technique can be used in combination with "frame bursting" as specified by the IEEE 802.11e standard to provide an end-to-end cut-through channel access. Using extensive simulations, we compare the performance of DCMA with 802.11 DCF MAC with respect to throughput and latency and suggest a suitable operating region to get maximum benefits using our mechanism as compared to 802.11
IEEE Journal of Selected Areas in Communications
ACHARYA, A.; Ganu, S.; and MISRA, Archan.
DCMA: A Label-Switching MAC for efficient packet forwarding in multi-hop wireless networks. (2006). IEEE Journal of Selected Areas in Communications. 24, (11), 1995-2004. Research Collection School Of Information Systems.
Available at: http://ink.library.smu.edu.sg/sis_research/659