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m →Adapting MAC scheduling based on PHY parameters: WP:CHECKWIKI error fixes using AWB (12054) |
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[http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=6151784&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D6151784 "Cross-Layer Optimization Using Advanced Physical Layer Techniques in Wireless Mesh Networks", in IEEE Transactions on Wireless Communications]</ref><ref name=Miao>{{cite book|author1=G. Miao|author2=G. Song|title=Energy and spectrum efficient wireless network design|publisher=[[Cambridge University Press]]|isbn=1107039886|year=2014}}</ref>
In some communications channels (for example, in power lines), noise and interference may be non-stationary and might vary synchronously with the 50 or 60 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 and interference level is changing, so that the MAC can schedule transmission during the periods of time in which noise and interference levels are lower.<ref name="Miao
▲In some communications channels (for example, in power lines), noise and interference may be non-stationary and might vary synchronously with the 50 or 60 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 and interference level is changing, so that the MAC can schedule transmission during the periods of time in which noise and interference levels are lower<ref name=Miao>{{cite book|author1=G. Miao|author2=G. Song|title=Energy and spectrum efficient wireless network design|publisher=[[Cambridge University Press]]|isbn=1107039886|year=2014}}</ref>.
An example of a communications system that allows this kind of Cross-layer optimization is the [[ITU-T]] [[G.hn]] standard, which provides high-speed local area networking over existing home wiring (power lines, phone lines and coaxial cables).
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