Abstract
Abstract To account for randomly distributed nodes in a wireless ad hoc network, the transmission capacity is defined as the number of successful transmissions taking place in the network per unit area under an outage constraint. In this paper, we analyze the transmission capacity for dual-hop relaying in a wireless ad hoc network in the presence of both cochannel interference and thermal noise, where interferers are spatially distributed following a Poisson distribution. Specifically, we first present the exact outage probability for amplify-and-forward and decode-and-forward protocols in a Poisson field of interferers without neglecting noise at all nodes. We then derive the transmission capacity of such networks, which determines the maximum allowable density of transmitting nodes for each relay strategy at a specified outage probability and data rate. Numerical results demonstrate that the dual-hop relaying is still beneficial in terms of the transmission capacity in wireless ad hoc Poisson networks.
Highlights
Cooperative relay communication has recently drawn considerable attention to increase network coverage and reliability [1,2]
The analytic and simulated results showed that outage probability of dual-hop relay had an error floor in high density of transmitting nodes and performance was greatly influenced by distance and interference power
We consider a metric of decentralized wireless network, called transmission capacity, for dual-hop relay with AF and DF strategies
Summary
Cooperative relay communication has recently drawn considerable attention to increase network coverage and reliability [1,2]. We analyze exact outage probability of a dual-hop relay with both noise and interference in a wireless ad hoc network. As transmission capacity has considered single-hop transmission without noise, we focus on the transmission capacity of dual-hop relay with noise and specific relaying protocols It is worth of finding maximum successful transmitting nodes per unit area to satisfy outage probability and data rate from transmission capacity of dual-hop relay. Both noise and interference with Poisson distribution are considered, it is noted that dual-hop relay is still beneficial in terms of transmission capacity. ∞ 0 tx−1 e−t dt and g(s,x) is the lower x incomplete gamma function ts−1e−tdt
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