On the Degrees of Freedom for Multi-Hop Wireless Networks under Layered TDD Constraint

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DOI:

https://doi.org/10.4108/sis.1.3.e4

Abstract

Degrees of freedom (DoF) of a network build a new scaling law characterizing the scalability of capacity at high signal-to-noise region. In this paper, we extend our recent work from cascaded network to the general K-hop layered network. The main framework is based on the assumption of layered TDD, where all nodes at each layer work with the same on/off status. By this approach we decompose the DoF analysis into two steps: 1) apply the result of cascaded networks; 2) analyze / design the transmission of each hop. The upper and lower bounds on DoF are deduced. By viewing the network as cascaded X channels, we find an inner bound of the DoF region, applicable to many message topologies. The detail of message splitting is demonstrated. Finally ultimate analysis shows if the number of antennas/nodes at each relay layer goes to infinity, the lower bound reaches the upper bound. As a by-product, when K > 2 the network can alleviate the effect of TDD with the increase of relay antennas/nodes.

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Published

27-05-2014

How to Cite

1.
Liu F, Wang X, Zeng L. On the Degrees of Freedom for Multi-Hop Wireless Networks under Layered TDD Constraint. EAI Endorsed Scal Inf Syst [Internet]. 2014 May 27 [cited 2024 Nov. 13];1(3):e4. Available from: https://publications.eai.eu/index.php/sis/article/view/2316

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