5IntroduCtIon
related work in terms of the average relay node count and distribution,
the scalability of the federated WSNs in large scale applications, and
the robustness of thetopologies formed. We elaborate further on this
strategy in Chapter 6 where the hexagonal virtual grid is assumed
instead of the square one. We propose the use of cognitive nodes
(CNs) in the underlying sensor network to provide intelligent infor-
mation processing and knowledge-based services to the end users. We
identify tools and techniques to implement the cognitive functionality
and formulate a strategy for the deployment of CNs in the underlying
sensor network to ensure a high probability of successful data recep-
tion among communicating nodes. From MATLAB
®
simulations, we
were able to verify that in a network with randomly deployed sensor
nodes, CNs can be strategically deployed at predetermined positions,
to deliver application-aware data that satises the end user’s qual-
ity of information requirements, even at high application payloads.
Chapter7 proposes a 3-D grid-based deployment for heterogeneous
WSNs (consisting of SNs, RNs, and MRNs). e problem is cast
as a Mixed Integer Linear Program (MILP) optimization problem
with the objective of maximizing the network lifetime while main-
taining certain levels of fault-tolerance and cost eciency. Moreover,
an Upper Bound (UB) on the deployed WSN lifetime, given that
there are no unexpected node/link failures, has been driven. Based on
practical/harsh experimental settings in OEM, intensive simulations
show that the proposed grid-based deployment scheme can achieve an
average of 97% of the expectedUB.
Additionally, a typical scenario has been discussed and analyzed in
smart cities while considering genetic based approaches in Chapter8.
In this chapter, we study the path planning problem for these DCs
while optimizing their counts and their total traveled distances. As
the total collected load on a given DC route cannot exceed its stor-
age capacity, it is important to decide on the size of the exchanged
data packets (images, videos, etc.) and the sequence of the targeted
data sources to be visited. We propose a hybrid heuristic approach for
public data delivery in smart city settings. In this approach, public
vehicles are utilized as DCs that read/collect data from numerously
distributed Access Points (APs) and relay it back to a central process-
ing base station in the city. We also introduce a cost-based tness
function for DCs election in the smart city paradigm. Our cost-based