Cross-layer optimization: Difference between revisions

Revision as of 01:13, 1 March 2016

Revision as of 01:14, 1 March 2016

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<ref>F. Foukalas et al.,

[http://ieeexplore.ieee.org/xpl/articleDetailslogin.jsp?tp=&arnumber=44836716151784&contentTypeurl=Journals+http%26+Magazines&sortType3A%3Dasc_p_Sequence2F%26filter2Fieeexplore.ieee.org%3DAND2Fxpls%28p_IS_Number2Fabs_all.jsp%3A44836643Farnumber%293D6151784 "Cross-layer design proposals for wireless mobile networks: a survey and taxonomy "]</ref>

In some communications channels (for example, in power lines), noise may be non-stationary and might vary synchronously with the 50 or 60&nbsp;Hz [[AC current]] cycle. In scenarios like this, overall system performance can be improved if the MAC can get information from the PHY regarding when and how the noise level is changing, so that the MAC can schedule transmission during the periods of time in which noise levels are lower.