Mımo tabanlı kablosuz algılayıcı ağlar için fırsatçı paket iletim planı

2011 IEEE 19th Signal Processing and Communications Applications Conference, SIU 2011 -- 20 April 2011 through 22 April 2011 -- Antalya -- 85528In this paper, we consider a MIMO wireless sensor network model with single hop architecture, which consists of both a central control node and sensor nodes having multiple antennas. In our system model, we concentrate on single beam opportunistic communication and propose a novel MAC protocol that can perform multiuser diversity gain based on effective SNR (ESNR) metric with the aid of selection combining technique. Packet transfer from sensor nodes to control node is initiated when the channel quality of any node exceeds the predefined threshold. In order to maximize the system performance, we find an optimum threshold for packet transmission decision of sensor nodes. The problem of finding the optimum threshold is formulated using the probability of successful packet reception at the control node. The performance of the suggested MAC protocol is demonstrated through Monte Carlo simulations for Rayleigh slow fading channel model. © 2011 IEEE