Computer Science – Information Theory
Scientific paper
2007-07-24
IEEE Trans. Information Theory, Vol. 53, No. 11, pp. 4127-4149, Nov. 2007
Computer Science
Information Theory
Accepted for publication in IEEE Trans. Inform. Theory, 24 pages
Scientific paper
This paper addresses three issues in the field of ad hoc network capacity: the impact of i)channel fading, ii) channel inversion power control, and iii) threshold-based scheduling on capacity. Channel inversion and threshold scheduling may be viewed as simple ways to exploit channel state information (CSI) without requiring cooperation across transmitters. We use the transmission capacity (TC) as our metric, defined as the maximum spatial intensity of successful simultaneous transmissions subject to a constraint on the outage probability (OP). By assuming the nodes are located on the infinite plane according to a Poisson process, we are able to employ tools from stochastic geometry to obtain asymptotically tight bounds on the distribution of the signal-to-interference (SIR) level, yielding in turn tight bounds on the OP (relative to a given SIR threshold) and the TC. We demonstrate that in the absence of CSI, fading can significantly reduce the TC and somewhat surprisingly, channel inversion only makes matters worse. We develop a threshold-based transmission rule where transmitters are active only if the channel to their receiver is acceptably strong, obtain expressions for the optimal threshold, and show that this simple, fully distributed scheme can significantly reduce the effect of fading.
Andrews Jeffrey G.
Jindal Nihar
Weber Steven
No associations
LandOfFree
The effect of fading, channel inversion, and threshold scheduling on ad hoc networks does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The effect of fading, channel inversion, and threshold scheduling on ad hoc networks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The effect of fading, channel inversion, and threshold scheduling on ad hoc networks will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-440637