STiCMAC

A MAC protocol for robust space-time coding in cooperative wireless LANs

Pei Liu, Chun Nie, Thanasis Korakis, Elza Erkip, Shivendra Panwar, Francesco Verde, Anna Scaglione

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Article number6151783
Pages (from-to)1358-1369
Number of pages12
JournalIEEE Transactions on Wireless Communications
Volume11
Issue number4
DOIs
StatePublished - Apr 2012

Fingerprint

Medium Access Control
Medium access control
Wireless LAN
Local area networks
Relay
Coding
Space-time
Network protocols
Cooperative Communication
IEEE 802.11
Communication
Distributed Environment
Wireless Communication
Decentralized
Vertex of a graph

Keywords

  • cooperative communications
  • IEEE 802.11
  • medium access control
  • protocol design
  • randomized distributed space-time coding (R-DSTC)
  • Space-time code MAC (STiCMAC)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Applied Mathematics

Cite this

STiCMAC : A MAC protocol for robust space-time coding in cooperative wireless LANs. / Liu, Pei; Nie, Chun; Korakis, Thanasis; Erkip, Elza; Panwar, Shivendra; Verde, Francesco; Scaglione, Anna.

In: IEEE Transactions on Wireless Communications, Vol. 11, No. 4, 6151783, 04.2012, p. 1358-1369.

Research output: Contribution to journalArticle

Liu, Pei ; Nie, Chun ; Korakis, Thanasis ; Erkip, Elza ; Panwar, Shivendra ; Verde, Francesco ; Scaglione, Anna. / STiCMAC : A MAC protocol for robust space-time coding in cooperative wireless LANs. In: IEEE Transactions on Wireless Communications. 2012 ; Vol. 11, No. 4. pp. 1358-1369.
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