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Achievable Throughput in Two-Scale Wireless Networks
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DOI：10.1109/JSAC.2009.090913.png)
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We propose a new model of wireless networks which we refer to as two-scale networks. At a local scale, characterised by nodes being within a distance r, channel strengths are drawn independently and identically from a distance-independent distribution. At a global scale, characterised by nodes being further apart from each other than a distance r, channel connections are governed by a Rayleigh distribution, with the power satisfying a distance-based decay law. Thus, at a local scale, channel strengths are determined primarily by random effects such as obstacles and scatterers whereas at the global scale channel strengths depend on distance. For such networks, we propose a hybrid communications scheme, combining elements of distance-dependent networks and random networks. For particular classes of two-scale networks with N nodes, we show that an aggregate throughput that is slightly sublinear in N, for instance, of the form N/log(4) N is achievable. This offers a significant improvement over a throughput scaling behaviour of O(root N) that is obtained in other work.
Keyword:
Wireless networks
ad hoc networks
i.i.d. connections
decay law
throughput
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17.2
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6.4K
被引数:
3.1W
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