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The effect of fading, channel inversion, and threshold scheduling on ad hoc networks
Please use this identifier to cite or link to this item:
http://hdl.handle.net/1860/2696
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| Title: | The effect of fading, channel inversion, and threshold scheduling on ad hoc networks |
| Authors: | Weber, Steven
Andrews, Jeffrey G.
Jindal, Nihar |
| Keywords: | Ad Hoc Networks
Channel Inversion
Fading
Threshold Scheduling
Transmission Capacity (TC) |
| Issue Date: | Nov-2007 |
| Publisher: | Institute of Electrical and Electronics Engineers (IEEE) |
| Citation: | IEEE Transactions on Information Theory, 53(11): pp. 4127-4149. |
| Abstract: | 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. |
| URI: | http://dx.doi.org/10.1109/TIT.2007.907482
http://hdl.handle.net/1860/2696 |
| Appears in Collections: | Faculty Research and Publications (ECE)
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