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2006

A Tutorial on Cross-Layer Optimization in Wireless Networks

8 years 12 months ago
A Tutorial on Cross-Layer Optimization in Wireless Networks
This tutorial paper overviews recent developments in optimization-based approaches for resource allocation problems in wireless systems. We begin by overviewing important results in the area of opportunistic (channel-aware) scheduling for cellular (single-hop) networks, where easily implementable myopic policies are shown to optimize system performance. We then describe key lessons learned and the main obstacles in extending the work to general resource allocation problems for multihop wireless networks. Towards this end, we show that a clean-slate optimization-based approach to the multihop resource allocation problem naturally results in a "loosely coupled" cross-layer solution. That is, the algorithms obtained map to different layers [transport, network, and medium access control/physical (MAC/PHY)] of the protocol stack, and are coupled through a limited amount of information being passed back and forth. It turns out that the optimal scheduling component at the MAC layer ...
Xiaojun Lin, Ness B. Shroff, R. Srikant
Added 13 Dec 2010
Updated 13 Dec 2010
Type Journal
Year 2006
Where JSAC
Authors Xiaojun Lin, Ness B. Shroff, R. Srikant
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