Research
Transmission capacity for dual-hop relaying in wireless ad hoc networks
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* Corresponding author: Jun Heo junheo@korea.ac.kr
1 School of Electrical Engineering, Korea University, 5-1 Anam-dong, Sungbuk-gu, Seoul, Republic of Korea
2 Department of Electronics and Radio Engineering, Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 446-701, Republic of Korea
3 Department of Electronics Engineering, Konkuk University, Seoul 143-701, Republic of Korea
EURASIP Journal on Wireless Communications and Networking 2012, 2012:58 doi:10.1186/1687-1499-2012-58
Published: 22 February 2012Abstract
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.
