Performance Evaluation of Artificial Ant Colony using Zone Based Routing Approach in MANET

International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056
Volume: 04 Issue: 06 | June -2017 www.irjet.net p-ISSN: 2395-0072
© 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 2089
Performance evaluation of artificial ant colony using zone based routing
approach in MANET
Madhvi Patel1, Prof. Dileep Sharma2
1,2 Computer Science Engineering
Nagaji Institute of Technology and Science
Datia, India
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Abstract: AntNet uses “artificial ants” that would
repeatedly travel through the network and collect the
information about the current traffic conditions in the
network. This information would be used to direct the data
packets towards their destination. AntNet showed very
promising results and turned out to be highly adaptive in
dynamic network environments. The capability of AntNet
to adapt to dynamic environments seems to make AntNet-
like protocol well suited for the routing in MANET. In our
work, a self-organizing network model is designed using
ant net routing, and this is a simple routing mechanism.
The way about how local information is exchanged is
depend on the behavior of the node. In order to adapt the
feature of routing algorithms are designed base on
distributed routing that are Ant Net algorithm using Zone
based routing scheme. The algorithms can be used to find
shortest paths in the network hop by hop, and the next hop
selection policies are designed, and the algorithms are
expanded to support quality of service parameters.
Keywords: AntNet, ZRP Performance Metrics, NS-2.
1 INTRODUCTION
In today’s fast growing Internet traffic conditions
changes and failures occurs at some parts of the network
from time-to-time, in an unpredictable manner. Therefore,
there is a need for an algorithm to manage traffic flows and
deliver packets from the source to the destination in a
realistic time. An ideal routing algorithm should be node
and link independent, and be able to deliver packets to
their destination with the minimum amount of delay,
regardless of the network size and the traffic load. The
routing algorithms currently in use lack intelligence, and
need human assistance and interpretation in order to
adapt themselves to failures and changes. In recent years,
agent based systems and reinforcement learning have
attracted researchers interest.
Many aspects of the collective activities of social
insects are self-organized. Theories of self-organization
(SO) in social insects show that complex behavior may
emerge from interactions among individuals that exhibit
simple behavior. This process is spontaneous; it is not
directed or controlled by any individual. The resulting
organization is wholly decentralized or distributed over all
the individuals of
The colony. Recent research shows that SO is
indeed a major component of a wide range of collective
phenomena in social.
The Ant net algorithm is distributed throughout
the network, you must choose the best path to take the
packages to your destination and avoid congestion [9].
Most algorithms using data structures in the nodes
(Routing Tables), these structures are both databases and
local models of global state, the information such as store
and update depends on the algorithm used.
Antnet is a software agent that is.Application
based routing algorithm. Practically ants deposit some
kind of chemical substance that is pheromone which
marks the path that they used and on their way back they
choose the path with the maximum pheromones which
becomes the optimal path. Ants are nothing but software
agents which are used in antnet update the probabilistic
distance vector routing table entries and to collect traffic
information. The existing Antnet Algorithm deals with only
feedback provided to the system by the software agents
and are the round trip time from source to destination.
Then the distance vector table is updated using this
feedback signals. As in the real life scenario chemical
substance deposited by the ants evaporates over time in
the same way routing table entries based on link usage
statistics also evaporates with time. The comparethe
performances of packetsdelivery ratio and average end-to-
end delay are superior to the traditional routing protocol
and ant-colony based routing algorithm as per our
research modified AntNet scheme.

The rest of the paper begins with performance
analysis of zone based routing approach for single hop and
double hop. The rest of this paper is organized as follows.
In Section II and III provides an overview routing protocol
is introduced. Section V, VI and VII shows the Simulation
parameters, performance metrics and simulation model.
Performance summary is demonstrated in Section VIII.
Finally Section IX concludes the paper.
2 ANTHOCNET & ANTNET
ANTHOCNET is combination of reactive route
establishment & proactive route maintenance which
makes it a hybrid multipath routing algorithm. In
ANTHOCNET the paths are set according to the pheromone
tables which indicate their respective quality. After the
route setup, data packets are routed randomly over the
different paths following these pheromone tables. ANTNET
is a table-driven (proactive) Ant Colony Optimization
Routing Algorithm (ACRA) for
Packet switched networks. In this routing algorithm, a
forward ant is launched from the source node at regular
intervals of time. A forward ant at each intermediate node
selects the next hop using the information stored in the
routing table of the node. The next node is select with a
probability proportional to the goodness of that node
which is measured by the amount of pheromone deposited
on the link to the node.
Position Based Routing Algorithm
In Position Based Routing Algorithm it is assume that a
node is aware of its position, the position of its neighbors,
and the position of the destination. The position of nodes
in a network can be estimate by the instruments like GPS
receivers which motivated researchers to propose
position based routing algorithm. Such as GPSR [12] and
DIR
LOCANT: location based ant colony routing algorithm
LOCANT is a location based ant colony optimization
routing algorithm which use location information to
improve efficiency. LOCANT is reactive in nature that’s
why the route is searched for only when there is a
collection of data packets that are to be sent from a source
node to a destination node. LOCANT is able to find
optimum routes when a given network contains nodes of
different transmission ranges. The next phase in our
algorithm is concept of zones.
Delivery of data packets after defining route to the
destination it is very important to deliver the data packets
at the right time. Delivery of data packets too early may
result in the loss of the packet or may follow a longer route
which increases the traffic in the network. On the other
hand, sending late increases the delay. The appropriate
time for sending data packets is determined as follows: For
each of the six zones from the sender to the destination D,
the sender calculates the average and standard deviation
of the delays reported by backward ants using the hop
count. So each backward ant carries the length of the path
passed from the destination to its current hop. Whenever a
backward ant is received by the sender, we update the
average and standard deviation of packet delays for the
corresponding zone using the delay reported by this ant.
To reduce the effect of old backward ants, we define a fixed
size window for each zone that contains recently received
backward ants from that zone. The average and standard
deviation of delays will be calculated only for the
backward ants in the window. When a new backward ant
is received, we put it in the window of the corresponding
zone discarding the oldest ant when the window size has
been attained. Therefore, selecting an appropriate window
size is important. If the window size is too small, the
average delay calculated from the window. Information
would be too far from the real average. If the window size
is very big, existence of very old ants would affect the
result for a long time.
3 ZONE ROUTING PROTOCOL
Zone Routing Protocol or ZRP was the first hybrid routing
protocol with both a proactive and a reactive routing
component. ZRP was first introduced by Haas in 1997. ZRP
is proposed to reduce the control overhead of proactive
routing protocols and decrease the latency caused by
routing discover in reactive routing protocols. ZRP defines
a zone around each node consisting of its k-neighborhood
In ZRP, the distance and a node, all nodes within hop
distance from node belongs to the routing zone of node.
ZRP is formed by two sub-protocols, a proactive routing
protocol: Intra-zone Routing Protocol (IARP), is used
inside routing zones and a reactive routing protocol: Inter-

zone Routing Protocol (IERP), is used between routing
zones, respectively. A route to a destination within the
local zone can be established from the proactively cached
routing table of the source by IARP, therefore, if the source
and destination is in the same zone, the packet can be
delivered immediately. Most of the existing proactive
routing algorithms can be used as the IARP for ZRP.
Figure - Complete block diagram of ZRP
In a mobile ad-hoc network, it can be assumed
that most of the communication takes place between
nodes close to each other. The Zone Routing Protocol
(ZRP) described in takes advantage of this fact and divides
the entire network into overlapping zones of variable size.
It uses proactive protocols for finding zone neighbors
(instantly sending hello messages) as well as reactive
protocols for routing purposes between different zones.
Each node may define its own zone size, whereby the zone
size is defined as number of hops to the zone perimeter.
For instance, the zone size may depend on signal strength,
available power, reliability of different nodes etc. While
ZRP is not a very distinct protocol, it provides a framework
for other protocols. First of all, a node needs to discover its
neighborhood in order to be able to build a zone and
determine the perimeter nodes.
INTRAZONE ROUTING PROTOCOL
Intrazone Routing Protocol is an important part of ZRP
routing protocol. It is not a specific routing protocol but is
a family of limited-depth, link state, proactive routing. It
establishes a route for nodes locate in the same zone. IARP
efficiently guides route queries outward through border
casting and relaying queries blindly from neighbor to
neighbor. IARP helps to enhance the quality of real time
applications and proper route maintenance. It supports
unidirectional links as long as the link source and link
destination lie within a same routing zone. It maintains the
local routing information proactively based on periodic
exchange of neighbor discovery messages. All nodes are
referred by unique IP addresses. Although temporary
loops may form during the time of new link establishment
in the routing zone, it provides support as a loop free
routing protocol [14].
INTERZONE ROUTING PROTOCOL
ZRP uses Interzone routing protocol to communicate with
the nodes in different zones. It follows reactive approach
to find out new routes. Instead of sending queries to other
nodes using traditional flooding, IERP uses BRP which
improves the efficiency. For unidirectional links, IERP
provides the local support based on the routing
information of IARP [15]. Interzone routing protocol helps
to discover the global route and facilitates all the services
to maintain the routes based on local connectivity of
Intrazone routing protocol.
4 RELATED WORKS
AntNet is a hybrid algorithm, containing both reactive and
proactive elements. The algorithm is reactive in the sense
that it only gathers routing information about destinations
that are involved in communication sessions. It is
proactive in the sense that it tries to maintain and improve
information about existing paths while the communication
session is going on (unlike purely reactive algorithms,
which do not search for routing information until the
currently known routes are no longer valid). Routing
information is stored in pheromone tables that are similar
to the ones used in other ACO routing algorithms[1-3].
Forwarding of control and data packets is done in a
stochastic way, using these tables. Link failures are dealt
with using specific reactive mechanisms, such as local
route repair and the use of warning messages. Below, we
describe the general working of the AntNet routing
algorithm. In AntHocNet, routing information is organized
in pheromone tables, similar to the ones used in other ACO
routing algorithms such as the earlier described AntNet[9-
14]
Antnet Routing Algorithm is an agent based routing
algorithm that is influenced from the real ant’s behaviour.
In Antnet ants explores the network to find the optimal
paths from the randomly selected source destination pairs.
Moreover, while exploring the network ants update the
probabilistic routing tables and construct a statistical
model of the nodes local traffic. Ants make use of these
tables to communicate with each other. The algorithm uses
two types of ants namely, forward ants and backward ants
to collect network statistics and to update the routing
table.
In each node there are two types of queues, low priority
and high priority. The data packets and the forward ants

use low priority queues, whereas the backward ants use
the high priority queues. Later forward ants do also use
the high priority queues.
1. Forward Ants who gather information about the state of
the network, and
2. Backward Ants who use the collected information to
adapt the routing tables of routers on their path.
Figure Real Ants Choose Path
An AntNet router contains a special routing table where
each destination is associated to all interfaces and each
interface has a certain probability. This probability
indicates whether or not it is interesting to follow that link
in the current circumstances. The router also contains a
statistical model to store the mean and variance values of
the trip times to all destinations in the routing table. These
are used as reference values [5-8]. On a regular time base,
every router sends a Forward Ant with random
destination over the network. The task of the Forward
Ants is collecting information about the state of the
network. In each router they pass, the elapsed time since
the start is stored on an internal stack together with the
identifier of the router. Then the next hop is determined.
Normally this is based on the probabilities in the routing
table. There is however a small chance (exploration
probability) that the next hop is randomly chosen. This is
necessary to constantly explore the network and to be able
to react fast to network changes like link failures or
congestion.
To overcome the problem of congestion by using change
some energy parameters and change mobility of Ant-
Colony Optimization. In the improved version, of ACO, this
Ant-Colony Optimization can find more than one optimal
outgoing interfaces are identified as compared to only one
path, which are supposed to provide higher throughput
and will be able to explore new and better paths even if the
network topologies gets changed very frequently. This will
distribute the traffic of overloaded link to other preferred
links. Hence the throughput of the network will be
improved and the problem of stagnation will be rectified
[16-19].
This is necessary to constantly explore the
network and to be able to react fast to network changes
like link failures or congestion. the overall performances
using Zone based hybrid routing approach for ant colony
optimization means ant hoc network, the simulation done
for wireless ad hoc network. This shows that results are
able to adapt well to the fast changes in the highly dynamic
environment caused by high node mobility the overall
performance parameters values indicates in graphical
method.
5 SIMULATION PARAMETERS
Simulation Parameters is given below:
PARAMETERS VALUE
Simulator NS-2
Routing protocol Ant-ZRP
Number of Nodes 40
Area 800mX 800m
Packet size 512byte
Simulation time 100 to 500s
Pause time 10.0
Traffic type CBR
Mac protocol Mac/802.11
Speed 10 m/s
6 PERFORMANCE METRICES
Author report performance metrics for the protocols:
 Packet Delivery Ratio - It is calculated by
dividing the number of packet received by
destination through the number packet originated
from source.
PDF = (Pr/Ps)
where Pr is total Packet received and Ps is the total
Packet sent.
 Average Delay- It is defined as the time taken for
a data packet to be transmitted across an MANET
from source to destination.
D = (Tr –Ts)
where Tr is receive Time and Ts is sent Time.
 Normalized Load- It can also be defined as the
ratio of routed packets to data transmissions in a
single simulation. It is the routing overload per
unit data delivered successfully to the destination
node

 Throughput -It is the average number of
messages successfully delivered per unit time.
7 SIMULATION MODEL
Each of the experiments, we specify how the different
applied scenarios were derived from it. We consider a
network of 40 nodes that move in a rectangular area of
800m × 800m. It is an open area. Limit node mobility or
signal propagation. Node movements are defined
according to the RWP mobility model. Under this model,
each node starts from a randomly chosen initial position in
the area, and independently chooses a random speed
between a given maximum speed, and a random
destination. Then, it moves at the chosen speed towards
the chosen destination in a straight line. Upon arrival, it
remains static for a fixed pause time, after which it chooses
a speed to destination. We use a maximum speed of
respectively 10 and 40m/s, and a pause time of 1.0s. Each
experiment has duration of 100s, and is repeated 4 times,
using different random instances of the same scenario.
Data traffic is generated by constant bit rate (CBR)
sessions: 5 data sessions are run between randomly
chosen source and destination nodes. By observing the
performance of the network under mobility we can test
the stability of design in real time scenario with varying
Maximum Speed. Data rate of 2Mbps is used [6, 9].
8 SIMULATION RESULTS ANALYSIS
In this section present the simulation results
demonstrating the effectiveness of our algorithm. the
proposed method has been implemented in NS 2. And the
experimental performance analysis is presented. These
overall performance metrics show with variation
simulation time.
Figure- PDF with varying simulation time
Figure- NRL with varying simulation time
Figure- Average End to End Delay varying simulation time
Figure- Average Throughput varying simulation time
In this first set of experiments, the variation of no of nodes
in the RWP mobility model, from using as intermediate
values of each parameters disc. Varying the simulation
parameters like as simulation time with RWP mobility
model affects the node mobility directly in an obvious way:
the higher the speed, the higher the mobility. Higher
mobility leads to more frequent changes in the network
environment, and therefore to more difficult scenarios.
The results of the experiments are shown in figure, where
we report (a) the delivery ratio, (b) the average end-to-end
delay (c), Average Throughput and (d), the overhead ratio
in number of packets. The results for delivery ratio reflect
the increasing level of difficulty of the scenarios: for all
algorithms the delivery ratio decreases with increasing
node speeds. The best results are obtained by double zone
hierarchical routing approach in wireless environment
using ant hoc network, by change the parameters that even
at the highest speeds are able to deliver average packets of
almost 85 percent. This shows that results are able to
adapt well to the fast changes in the highly dynamic
environment caused by high node mobility the overall
performance parameters values indicates in graphical
method.
9 CONCLUSION
In this section presentAnt based routing network.
Ant systems are self organizing systems which have many
of the characteristics of systems. Here, we describe the
measures that evaluate the performance of the different
routing algorithms in the experiments. The distinguish
between measures of effectiveness and measures of
efficiency.
Our work contains two parts: one is theoretical
study and other is empirical study. In theoretical part of
study it is clear to us that due to the random mobility of

node, routing becomes a complex issue. Till now many
routing protocols are used in MANET. Each routing
protocol has unique features. Based on network
environments. Proactive routing protocols are best suited
in small networks. In large and dense network, proactive
routing protocols cannot perform well. Proactive routing
protocols are table driven. Maintaining thousands of
routing tables properly in large network degrades the
efficiency. So for large and dense networks reactive
routing approach plays a major role. Reactive routing
protocols use destination sequence number and feasible
distance to ensure a loop free routing. Hybrid routing
protocols use reactive and proactive approach in routing
operations. The zone based routing protocol- ZRP uses the
proactive approach for communication within zone. For
the creation of global route it follows the reactive routing
the hybrid algorithm proved to be more efficient. The
algorithm is suitable for urban scenarios or in other words
for dense network where there are more vehicles within
the zone. Route maintenance strategy is used due to the
continuous our objective for this works to develop an
effective Ant colony optimization technique to maximize or
minimize different performance parameters like load,
Delay and received packet percentage.
In future, the proposed multilevel ant colony
optimization algorithm. Multiple Ant-Colony Optimization
can find more than one optimal outgoing interfaces are
identified as compared to only one path, which are
supposed to provide higher throughput and will be able to
explore new and better paths even if the network
topologies gets changed very frequently.
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