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Table 1 Notation

From: A novel algorithm to form stable clusters in vehicular ad hoc networks on highways

Notation

Description

r

Service channel transmission range

R

Control channel transmission range

d

Nodal degree

SN

Stable neighbors

CCM

Candidate cluster member

Δv th

The threshold used to classify neighboring nodes as stable or non stable neighbors

μ

The mean value of the speed

σ

The standard deviation of the speed

u

The suitability value to become a cluster-head

p

The position of the vehicle

p norm

The normalized position

v norm

The normalized speed

CH

Cluster-head

CM

Cluster member

COV

Cluster originating vehicle

T wait

The waiting time before announcing the eligibility to become a CH

Γ(t)

A set containing the IDs of the 2r-stable neighbors whose velocities are greater than the velocity of the current vehicle

Λ(t)

A set containing the IDs of the 2r-stable neighbors whose velocities are less than the velocity of the current vehicle

N max

The total number of vehicles in Γ(t) at time t

RT

The residual time of the vehicle in the transmission range of the CH

NCC

The number of cluster changes per vehicle

λtr,mean

The average transition rate between clusters

N i,life

The lifetime of vehicle i during the simulation

K

The total number of vehicles in the system

C avg total

The average number of the total number of the created clusters