Uppsala universitet

Multiuser Diversity and Maximum Entropy Scheduling

Mathias Johansson

Radiovetenskap och Kommunikation RVK 02, Stockholm, June 2002.


Abstract:
Multiuser diversity is exploited by tracking rapidly time-varying radio channels and allocating more transmission resources to users with good instantaneous channel conditions.

We explain how to simultaneously exploit multiuser diversity and variable and highly uncertain source bit rates to maximize system capacity. A framework for scheduling under uncertainty is derived based on the maximum entropy principle.

By using the channel and the source rates as independent sources of diversity, the sum capacity is substantially improved. The performance of maximum entropy scheduling is compared to another recent proposal for exploiting multiuser diversity.

Related publications:
GlobeCom 2001-Paper on this topic.
A system proposal in which multiuser diversity is crucial (RVK02).

 

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