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Data aggregation significantly reduces signaling overhead and delay by encapsulating multiple packets in queue into an aggregated packet in uplink two-hop relaying networks. In addition, hybrid automatic repeat request (HARQ) operation increases the system throughput by retransmitting the entire or part of the packet transmitted at the initial transmission. We combine data aggregation and HARQ schemes...
In order to understand the key merits of multiuser diversity, opportunistic scheduling and spectrum reuse techniques in downlink relay-based cellular networks, this paper analyzes the spectral efficiency performance over a fading multihop broadcast channel (MBC) composed of a base station (BS), a relay station (RS), U far users and V near users in the asymptotic regime of large number of users. Using...
Recently, the cooperative communication is attracting much attention for enlarging the cell coverage and achieving large received SNR. In cooperative communication, the relay station receives the signal from the source station and then forwards it to the destination station. In the decoding and forwarding relay process, the bit error detection is performed the received signal for avoiding the erroneous...
In this paper, a two-hop relay assisted cooperative orthogonal space-time block codes (OSTBC) transmission scheme is considered for the downlink communication of a cellular system, where the base station (BS) and the relay station (RS) cooperate and transmit data to the user equipment (UE) in a distributed fashion. We analyze the impact of the SNR imbalance between the BS-UE and RS-UE links, as well...
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