An Overview of Distributed Energy-Efficient Topology Control for Wireless Ad Hoc Networks

Figure 9

Transmission power selection in the CTCA algorithm. (a) Case 1: Node 𝑁₃’s, where node 𝑁₁ is not able of minimizing its power level without being unconnected. (b) Case 2: Node 𝑁₃ minimizes its power level to its optimal power, but 𝑁₁’s lifetime cannot be increased. (c) Case 3: Node 𝑁₃ maximizes its power level to 𝑝(𝑁₃;𝑁₂). Now, node 𝑁₁ is capable to minimize its power without being unconnected. (d) Case 4: Node 𝑁₁ modifies its certain power level to its potential power and improves lifetime of the network.

(a)

(b)

(c)

(d)