Hierarchical Cooperation in Ultra-Wide Band Ad Hoc Networks

Won-Yong SHIN  Koji ISHIBASHI  

Publication
IEICE TRANSACTIONS on Communications   Vol.E96-B   No.3   pp.887-890
Publication Date: 2013/03/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E96.B.887
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Fundamental Theories for Communications
Keyword: 
hierarchical cooperation (HC),  multi-hop,  path-loss exponent,  power-limited,  throughput scaling,  ultra-wide band (UWB),  

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Summary: 
We show an improved throughput scaling law for an ultra-wide band (UWB) ad hoc network by using a modified hierarchical cooperation (HC) strategy; the n wireless nodes are assumed to be randomly sited. In a dense network of unit area, our result indicates that the derived throughput scaling depends on the path-loss exponent α for certain operating regimes due to the power-limited characteristics. It also turns out that the use of HC is helpful in improving the throughput scaling of our UWB network in some conditions. More specifically, assuming that the bandwidth scales faster than nα+1(log n)α/2, it is shown that the HC protocol outperforms nearest multi-hop routing for 2 < α < 3 while using nearest multi-hop routing leads to higher throughput for α ≥ 3.