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Cognitive Wireless Networking in the TV Bands - page 47 / 56

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Illustration – Is it difficult after all?

Assume that demands are static and fixed



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Self-induced fragmentation

1. Spatial reuse

(like coloring problem)

2. Avoid self-induced fragmentation

(no equivalent in coloring problem)

Scheduling even static demands is difficult!

The complete problem more complicated

External fragmentation

Dynamically changing demands

etc…

More difficult than coloring!

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