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Cognitive Wireless Networking in the TV Bands - page 43 / 56

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Problem Formulation

Network model:

Set of n nodes V={v1, , vn} in the plane

Total available spectrum S=[fbot,ftop]

Some parts of spectrum are prohibited (used by primary users)

Nodes can dynamically access any contiguous, available spectrum band

Simple traffic model:

Demand Dij(t,Δt) between two neighbors vi and vj

vi wants to transmit Dij(t, Δt) bit/s to vj in [t,t+Δt]

Demands can vary over time!

Goal:  Allocate non-overlapping time-spectrum blocks to nodes to satisfy their demand!

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