Hybrid-ARQ based intra-cluster geographic relaying

The paper presents an integrated, cross-layer protocol that utilizes position location (e.g., through an onboard GPS receiver) and jointly performs the operations of physical-layer cooperative diversity, hybrid-ARQ retransmission, and relaying/routing. The protocol is named Hybrid ARq-Based INtra-cluster GEographically-informed Relaying (HARBINGER) and generalizes both geographic random forwarding (GeRaF) and point-to-point hybrid-ARQ. A version, called slow-HARBINGER, is analyzed in detail. Numerical results indicate a dramatic improvement in the energy-latency tradeoff as compared with conventional multihop and GeRaF.