A Low Coordination Overhead C-ARQ Protocol with Frame Combining

Evaluation of a Cooperative ARQ Protocol for Delay-Tolerant Vehicular Networks

“…Cooperative ARQs are schemes which increase link reliability in data link protocols through the use of node cooperation; see [7], [8], [9], [10]. In [8] authors describe a scheme for improving loss resilience with diversity, focusing on wireless local area networks (WLANs).…”

“…In [9] authors present a generalization of Hybrid-ARQ where retransmitted packets do not need to come from the original source radio but could instead be sent by relays that overhear the transmission. The job reported in [10] presents a novel frame exchange mechanism between a node and its cooperators for C-ARQ/FC (Cooperative ARQ with Frame Combining).…”

“…In a first general scheme, not addressed to VANET, cooperation among nodes is established in a packet-by-packet basis, [10]. DC-ARQ, on the contrary, cooperation is established in the dark areas, where connectivity with the AP is lost.…”

Cooperative ARQ: A Medium Access Control (MAC) Layer Perspective

“…The transmission scheme, which includes the forwarding technique executed by the relays and the combination technique executed by the destination station to combine the different retransmissions received from independent paths. The approach of combining different erroneous copies of a same packet to decode the original packet has been tackled in the past (Charaborty et al, 2005;Morillo-Pozo & García-Vidal, 2007). 4) The MAC protocol which is necessary to tackle with the contention among the relays.…”

Performance analysis of a persistent relay carrier sensing multiple access protocol

“…However, in order to reduce the overhead, it is more convenient to use the basic access mode. 4) A cooperation phase finishes whenever the destination transmits an ACK packet to notify the successful decoding of the original data packet (by properly combining the different copies received from the relay set [11] or because an error-free copy has been received from a relay), or when it transmits a NACK packet if a certain maximum cooperation time-out has elapsed and the original packet has to be discarded. In order to illustrate the operation of PRCSMA, an example of operation is presented in Fig.…”