Cooperative Geographic Routing with Radio Coverage Extension for SER-Constrained Wireless Relay Networks

Coverage-Extended Cooperative Geographic Routing with Optimal Power Allocation for Wireless Multihop Networks

“…Our cooperation strategy follows those of [11], [13], using a modified version of the three-node decode-and-forward (DF) half-duplex signaling scheme as presented in [4]. The scheme consists of a sender S, a relay R, and a receiver D. In each hop, S broadcasts its symbol to both R and D with transmit power P 1 , and then R decodes the received symbol and decides whether to relay it to D. It is assumed that R achieves correct reception of the symbol as long as its received signal-to-noise ratio (SNR) exceeds a certain threshold.…”

“…In [11], we have defined the SER-based radio coverage to identify coverage extension from physical-layer cooperation. As a follow-up study of [11], we highlight some important definitions and properties as follows.…”

“…As a follow-up study of [11], we highlight some important definitions and properties as follows. Throughout this paper, we consider that the network graph G = (V, E) is mapped into a 2-dimensional geographic plane, where every node i ∈ V is characterized by its geographic location x i .…”

“…Nevertheless, these cooperative routing solutions do not take advantage of coverage extension of physical-layer node cooperation, since the cooperative route with coverage extension may be radically different from previous ones. Considering the demands for high efficiency and scalability in multihop routing as well as the potential benefit of coverage extension from cooperative transmission, in [11] we have investigated how the traditional non-cooperative geographic routing can be improved by incorporating the cooperative transmission into the design. Specifically, the previously proposed routing protocol, namely Relay-Aware Cooperative Routing (RACR), enables a forwarding node to make a local route decision depending on the geographic location of its relay while the relay is selected with the purpose of providing the maximum coverage extension toward the destination.…”

“…Specifically, the previously proposed routing protocol, namely Relay-Aware Cooperative Routing (RACR), enables a forwarding node to make a local route decision depending on the geographic location of its relay while the relay is selected with the purpose of providing the maximum coverage extension toward the destination. However, the cooperative geographic routing scheme discussed in [11] is based on the use of equal power allocation. it can be expected that, with optimal power allocation, we can further improve the radio coverage extension of RACR.…”