TY - JOUR
T1 - STiCMAC
T2 - A MAC protocol for robust space-time coding in cooperative wireless LANs
AU - Liu, Pei
AU - Nie, Chun
AU - Korakis, Thanasis
AU - Erkip, Elza
AU - Panwar, Shivendra S.
AU - Verde, Francesco
AU - Scaglione, Anna
N1 - Funding Information:
This work is supported by NSF Grants CNS-0520054 and CNS-0905446, by the New York State Center for Advanced Technology in Telecommunications (CATT), and by the Wireless Internet Center for Advanced Technology (WICAT), an NSF Industry/University Cooperative Research Center. The results presented in this paper have appeared in part at IEEE Globecom 2009 [1].
PY - 2012/4
Y1 - 2012/4
N2 - Relay-assisted cooperative wireless communication has been shown to have significant performance gains over the legacy direct transmission scheme. Compared with single relay based cooperation schemes, utilizing multiple relays further improves the reliability and rate of transmissions. Distributed space-time coding (DSTC), as one of the schemes to utilize multiple relays, requires tight coordination between relays and does not perform well in a distributed environment with mobility. In this paper, a cooperative medium access control (MAC) layer protocol, called STiCMAC, is designed to allow multiple relays to transmit at the same time in an IEEE 802.11 network. The transmission is based on a novel DSTC scheme called randomized distributed space-time coding (R-DSTC), which requires minimum coordination. Unlike conventional cooperation schemes that pick nodes with good links, STiCMAC picks a transmission mode that could most improve the end-to-end data rate. Any station that correctly receives from the source can act as a relay and participate in forwarding. The MAC protocol is implemented in a fully decentralized manner and is able to opportunistically recruit relays on the fly, thus making it robust to channel variations and user mobility. Simulation results show that the network capacity and delay performance are greatly improved, especially in a mobile environment.
AB - Relay-assisted cooperative wireless communication has been shown to have significant performance gains over the legacy direct transmission scheme. Compared with single relay based cooperation schemes, utilizing multiple relays further improves the reliability and rate of transmissions. Distributed space-time coding (DSTC), as one of the schemes to utilize multiple relays, requires tight coordination between relays and does not perform well in a distributed environment with mobility. In this paper, a cooperative medium access control (MAC) layer protocol, called STiCMAC, is designed to allow multiple relays to transmit at the same time in an IEEE 802.11 network. The transmission is based on a novel DSTC scheme called randomized distributed space-time coding (R-DSTC), which requires minimum coordination. Unlike conventional cooperation schemes that pick nodes with good links, STiCMAC picks a transmission mode that could most improve the end-to-end data rate. Any station that correctly receives from the source can act as a relay and participate in forwarding. The MAC protocol is implemented in a fully decentralized manner and is able to opportunistically recruit relays on the fly, thus making it robust to channel variations and user mobility. Simulation results show that the network capacity and delay performance are greatly improved, especially in a mobile environment.
KW - IEEE 802.11
KW - Space-time code MAC (STiCMAC)
KW - cooperative communications
KW - medium access control
KW - protocol design
KW - randomized distributed space-time coding (R-DSTC)
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U2 - 10.1109/TWC.2012.020712.101900
DO - 10.1109/TWC.2012.020712.101900
M3 - Article
AN - SCOPUS:84860219616
SN - 1536-1276
VL - 11
SP - 1358
EP - 1369
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
IS - 4
M1 - 6151783
ER -