A discrete-event simulator is conducted to evaluate the performance of the proposed KCLS protocol. The multihop wireless network used in the simulation has N homogeneous mobile nodes, which are randomly distributed in the area with S = 30 × 30 square units. All mobile nodes have the same radio transmission range with a radius r = 1 unit. The connection arrival rate for each node is assumed to be Poisson distributed with a mean value of λCall. The mobility model deployed in the simulations is the random walk model [32, 33], in which the node moving velocity is changed only at the beginning of each node-moving epoch. The moving rate and direction of a node within an epoch are constant, following uniform distribution among predefined ranges [0, Vm] and [0,2π], respectively, where Vm is the maximum rate of node moving. All clusters are created and maintained by the KCMBC approach . The parameters used in the simulation are illustrated in Table 7.4.
|Total number of nodes, N||1000–4000|
|Maximum moving rate, Vm||0.2–1 unit/s|
|Time interval of node moving epoch, τe||1 s|
|Mean connection arrival rate, λcall||1/420 s|
|Scaling factor, σ||0.1–0.5|
|Time interval for measuring link available time, TSLOT||10 s|
|Distance threshold, Dth||2 units|
The simulation is independently repeated 10 times. In each simulation run, 50,000 random connection requests are generated excluding a warm-up ...