Titel: Cooperative ARQ with Relay Selection: An Analytical Framework Using Semi-Markov Processes

An important building block in cooperative diversity is relay selection, which has to ensure that a well-suited node is employed as a relay. The required coordination among nodes causes signaling overhead, which in turn can significantly devalue the performance benefits gained by cooperative diversity. A relay update policy defines when a new relay is selected; it can balance the tradeoff between performance and overhead. This tradeoff is studied using mathematical methods. We consider three relay selection schemes, i.e., permanent, reactive, and adaptive, which have different relay update rules. We develop an analytical framework using semi-Markov processes to evaluate the throughput and energy efficiency of cooperative automatic repeat request (ARQ) protocols in time-correlated multipath fading channels. Results reveal potential performance gains of different selection schemes under various conditions. The reactive and adaptive schemes make use of better suited relays due to frequent selections. If their selection overhead, however, is significant, a permanent relay can achieve higher throughput due to negligible overhead. The impact of temporal correlation of fading channels on throughput and energy efficiency is also shown. These insights can be applied for development of cooperative communication protocols.

Publikationstyp: Beitrag in Zeitschrift (Autorenschaft)
Art der Veröffentlichung Printversion
Erschienen in: IEEE Transactions on Vehicular Technology, Vol. 54
IEEE Transactions on Vehicular Technology, Vol. 54
zur Publikation
 ( )
Erscheinungsdatum: 01.01.2014
Titel der Serie: -
Bandnummer: 63
Heftnummer: 1
Erstveröffentlichung: Ja
Seite: S. 178 - 190
Gesamtseitenanzahl: 13 S.



Organisation Adresse
Fakultät für Technische Wissenschaften
Institut für Vernetzte und Eingebettete Systeme
Universitätsstraße 65-67
9020  Klagenfurt am Wörthersee
zur Organisation
Universitätsstraße 65-67
AT - 9020  Klagenfurt am Wörthersee


  • 202041 - Technische Informatik
  • 202038 - Telekommunikation
Forschungscluster Kein Forschungscluster ausgewählt
  • Science Citation Index (SCI)
Informationen zum Zitationsindex: Master Journal List
Peer Reviewed
  • Ja
  • Science to Science (Qualitätsindikator: I)
Klassifikationsraster der zugeordneten Organisationseinheiten:
  • Mobile Systems Group


Keine Kooperationspartner ausgewählt

Beiträge der Publikation

Keine verknüpften Publikationen vorhanden