Author_Institution :
Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC
Abstract :
In this paper, we study link properties over dynamic radio channels based on analytical models and simulations. Specifically, channel variability and mobility are investigated through two quantities: effective transmission range and node-pair distance, respectively. We find that the PDF of link lifetime can be approximated by exponential distribution with parameter characterized by the ratio of average node speed to effective transmission range. Moreover, we show that average link lifetime for slower mobile nodes is mainly determined by radio channel characteristics, whereas for faster mobile nodes, it is dominated by node mobility. Through analysis and simulations, we find that the impacting factors on residual link lifetime are in the decreasing order of average node speed, effective transmission range, and node-pair distance on the fly. We further present the implication and application of link properties to path lifetime, network connectivity, and routing performance.
Keywords :
ad hoc networks; mobile radio; telecommunication network routing; telecommunication network topology; wireless channels; MANET; link dynamics; mobile ad hoc networks; network connectivity; node mobility; radio channels; routing performance; wireless networks; Analytical models; Communications Society; Computational modeling; Computer simulation; Exponential distribution; Fading; Network topology; Peer to peer computing; Routing; Wireless networks;
