Monitoring requirement: distributed (e.g., environmental
monitoring) or localized (e.g., target tracking)
Number of sites: sometimes small, but usually large (especially for
C1WSNs)
Spatial coverage: dense, spars: C1WSN: low-range multihop or
C2WSN: low-range single-hop (point-to-point)
Deployment: fixed and planned (e.g., factory networks) or ad hoc
(e.g., air-dropped)
Environment: benign (factory floor) or adverse (battlefield)
Nature: cooperative (e.g., air traffic control) or noncooperative
(e.g., military targets)
Composition: homogeneous (same types of sensors) or heterogeneous
(different types of sensors)
Energy availability: constrained (e.g., in small sensors) or
unconstrained (e.g., in large sensors)