ABSTRACT
Cooperative networking has received significant attention as an emerging network
design strategy since future cellular networks are eager for higher capacity and larger
coverage due to tremendously growing end-user demands and the amount of wire-
less terminals. One of the ways is to deploy more base stations (BSs) as done in
traditional cellular networks. In contrast a cooperative relay-aided cellular network,
as a more advanced system, introduces the use of relay stations (RSs) to increase the
capacity and the coverage, which provides better quality of service (QoS) especially
for cellular users (CUs) at the cell edge [61]. Moreover, cooperative relaying can also
reduce overall costs compared with traditional non-relay approaches [62]. However,
the performance gain of adopting cooperative relaying in cellular networks can be
minor due to two major reasons: (1) a bottleneck link between the relay station and
cellular user due to non-line-of-sight transmission, and (2) half-duplex cooperation
that basically leads to a 50% throughput reduction of the transmission from the BS
to the CU and may offset potentially achievable benefits from cooperative diversity,
as depicted in Figure 1.7b.
