Abstract
Traditional direct transmission or cooperative relaying can hardly meet the traffic demand in the traffic hotspots of the future wireless networks due to the limited radio resources. The store-carry and forward (SCF) scheme can address this issue to some extent, but still suffers from inter-user interference (IUI) of uncoordinated user-to-user (U2U) communications. Existing radio resource allocation approaches can decrease the IUI, but the additional uplink signaling overhead (USO) consumes too much radio resources. To address this issue, we propose a random subchannel selection-based SCF (SCF-RSS) scheme, where a USO-free user selection protocol is designed to establish U2U links. Simulations show that the proposed SCF-RSS can improve the system throughput and energy efficiency compared with the existing SCF.
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