MULTI-OBJECTIVE OPTIMIZATION ASSISTED NETWORK CONDITION AWARE QOS-ROUTING PROTOCOL FOR MANETS: MNCQM

International Journal of Computer Networks & Communications (IJCNC) Vol.11, No.4, July 2019
DOI: 10.5121/ijcnc.2019.11401 1
MULTI-OBJECTIVE OPTIMIZATION ASSISTED
NETWORK CONDITION AWARE QOS-ROUTING
PROTOCOL FOR MANETS: MNCQM
Shashi Raj K1
and Siddesh G K2
1
Department of Electronics and Communication, Dayananda Sagar College of
Engineering, Bengaluru, India
2
Department of Electronics and Communication, JSS Academy of Technical Education,
Bengaluru, India
ABSTRACT
The exponential rise in wireless communication systems and allied applications has revitalized academia-
industries to achieve more efficient data transmission system to meet Quality-of-Service (QoS) demands.
Amongst major wireless communication techniques, Mobile Ad-hoc Network (MANET) is found potential to
provide decentralized and infrastructure less communication among multiple distributed nodes across
network region. However, dynamic network conditions such as changing topology, congestion, packet drop,
intrusion possibilities etc often make MANET’s routing a tedious task. On the other hand, mobile network
feature broadens the horizon for intruders to penetrate the network and causes performance degradation.
Unlike classical MANET protocols where major efforts have been made on single network parameter based
routing decision, this research paper proposes a novel Elitist Genetic Algorithm (EGA) Multi-Objective
Optimization assisted Network Condition Aware QoS-Routing Protocol for Mobile Ad-hoc Networks
(MNCQM). Our proposed MNCQM protocol exhibits two phase implementation where at first it performs
node-profiling under dynamic network topology for which three factors; irregular MAC information
exchange, queuing overflow and topological variations have been considered. Towards this objective node
features like Packet Forwarding Probability (PFP) at the MAC layer, Success Probability of Data
Transmission (SPDT) of a neighboring node, and Probability of Successful Data Delivery (PSDD) have
been obtained to estimate Node-Trustworthiness Index (NTI), which is further used to eliminate
untrustworthy nodes. In the second phase of implementation, a novel Evolutionary Computing assisted non-
disjoint best forwarding path selection model is developed that exploits node’s and allied link’s
connectivity and availability features to identify the quasi-sub-optimal forwarding paths. EGA algorithm
intends to reduce hop-counts, connectivity-loss and node or link unavailability to estimate best forwarding
node. One key feature of the proposed model is dual-supplementary forwarding path selection that enables
alternate path formation in case of link outage and thus avoids any iterative network discovery phase.
KEYWORDS
MANET, QoS communication, Node-trustworthiness, Network awareness, Evolutionary computing based
routing decision.
1. INTRODUCTION
The exponential rise in communication system demands, especially wireless communication
systems have revitalized academia-industries to achieve more efficient and Quality of Service
(QoS) centric data transmission. On the other hand, the high pace increase in application and

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allied complexities of the operating conditions has been making classical transmission protocols
confined [1]. Static nature of Wireless Sensor Networks (WSNs) has given rise to a more
effective and mobile network solution named Mobile-Adhoc Network (MANET). Amongst
numerous wireless communication paradigms, MANET has been found more potential to enable
infrastructure-less and decentralized data transmission to serve major communication demands.
The infrastructure-less and decentralized nature of MANET enable it to be used under mobile
network conditions and (Ad-hoc) network restoration purposes during certain natural calamity
[1]. It can be formed by deploying multiple nodes working cooperatively under mobile topology
without imposing need of sophisticated and complex network infrastructure. In addition, the
nodes of MANET can function as routers as well to perform communication between two hosts
by incorporating multi-hop routing scheme. Being a decentralized and infrastructure less network
MANET undergoes significantly high topological changes and network condition’s variation such
as congestion, packet drop, retransmission, link outage, eavesdropping and packet loss caused due
to certain malicious node. Such adversaries often results into QoS compromise. Noticeably, QoS
compromise can be reflected in terms of reduced data transmission rate, higher latency, increased
retransmission, bandwidth and energy exhaustion etc. On contrary, up surging wireless
communication systems demand QoS and Quality of Experience (QoE) provision under dynamic
network conditions [4]. Typically, MANET being a dynamic network topology often undergoes
adversaries like link quality, link outage probability, data drop probability, resource unavailability
etc [40]. The classical reactive routing models employ constrained node parameters to perform
(best) routing decision; however dynamic nature of MANET and allied topological variations
give rise to the probability of varying network (and/or node) condition. Furthermore, MANET has
always been the victim of major network intrusion efforts where malicious nodes try to intrude
the predefined network to cause either data-loss or QoS degradation [2-4]. Exploring in depth it
can be found that in multi-hop transmission in addition to the malicious node, even the native
(predefined and approved) nodes might behave haphazardly impacting overall network
performance [1][4]. These nodes can behave irregularly casing link-outage, data drop, congestion
or queuing delay or overflow etc, which eventually degrades QoS delivery [7]. In this case
exploiting dynamic network and/or node condition for (optimal) best forwarding node (BFN)
selection can be of utmost significance. BFN with suitable routing strategy can reduce link-outage
probability [4], malicious caused premature link-outage, data drop, and retransmission. With this
motive, in this research paper we have focused on developing a robust Dynamic Network (node)
Profiling assisted BFN selection model for QoS delivery over MANETs. Though, a few efforts
have been made to augment routing protocols for MANETs; however majority of the existing
model either employ congestion probability [5] or link quality [41] to perform routing decision. In
practice, there can be the condition where a malicious node with available bandwidth and network
vicinity (i.e., within radio range) can be a part of the existing network and could cause attack or
packet loss in later phase of data transmission. It signifies the need of a robust (node)
trustworthiness estimation model of node-profiling strategy. The node-profiling of a node can
help transmitter identifying optimal BFN to achieve and retain QoS delivery in MANETs. Such
robustness can help a routing decision model to avoid false positive that can preserve QoS
delivery in terms of reliable data transmission and minimum bandwidth exhaustion.
In this research paper the emphasis is made on monitoring and exploiting node characteristics
over simulation period and identifying non-cooperative misbehaving nodes to isolate it for
preserving or augmenting network QoS delivery. Unlike major classical MANET protocols where
it is hypothesized that packet loss occurs due to malicious nodes alone, we have examined
different other factors impacting packet loss. Furthermore, the focus is made on developing a
node-trustworthiness model in conjunction with dynamic network topology to perform node-
profiling that helps in achieving optimal routing decision. To perform node profiling or

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trustworthiness estimation, it is vital to understand key factors signifying a node as malicious or
suitable BFN. With this motive, in this paper we have exploited three key factors; irregularity at
the MAC layer or improper information exchange at IEEE 802.11 MAC, queuing overflow and
topological variations to perform node-profiling. Exploiting multiple dynamic node parameters
such as Packet Forwarding Probability (PFP) at the MAC layer, Success Probability of Data
Transmission (SPDT) of a neighboring node, and Probability of Successful Data Delivery
(PSDD), we have estimated a factor called Node-Trustworthiness Index (NTI) that helps avoiding
untrustworthy nodes. Furthermore, in this paper evolutionary computing assisted routing model is
developed that performs dual disjoint best forwarding path selection by exploiting node or link
connectivity as well as dynamic availability. In addition, it intends to maintain minimum hop
while assuring best (dual) forwarding path with no shared (network) elements. This as a result
intends to maintain network reliability as well as topological optimization assisted reliable routing
so as to retain higher network performance.
The other sections of the paper are divided as follows. Section II discusses some of the key
related works, while problem formulation for the current study is discussed in Section III. The
detailed discussion of the proposed MNCQM routing protocol is given in Section IV. Section V
presents the simulation results and its inferences, while the references used are presented at the
end of the manuscript.
2. RELATED WORK
This section primarily discusses some of the key literatures pertaining to MANET routing
protocols.
The dynamic nature of MANET requires a well defined and cross-information schematic across
the IEEE 802.11 protocol stack [7]. Authors [7-9] have recommended using network (and/or
node) information from the different layers of the protocol stack to make suitable routing
decision. However, they [7-9] focused mainly on achieving QoS delivery by enabling timely and
reliable data transmission. To assure reliability for data transmission over MANET the authors
[10] applied retransmission and replication schemes. Unfortunately, such approaches increase
delay, bandwidth and energy exhaustion that eventually degrades QoS delivery. Authors [11]
applied multi-path transmission concept to achieve higher reliability; however it increased
computational and signaling overheads depleting energy of the nodes. As an augmented solution,
authors [11] developed Sequential Assignment Routing (SAR) that forms multipath in between
source to the destination by forming multiple trees in which the root of the individual tree is a
one-hop neighbor. Authors [11] applied residual energy of each node to perform routing decision,
where the route with maximum energy was considered as Best Forwarding Link (BFL). In
addition to energy, end-to-end delay of each path was considered for routing decision [12][39]. In
[13] authors exploited link quality and number of hops as routing decision parameter to perform
multipath transmission over sensor network. However, authors could not address the issue of
mobility and dynamic routing decision under dynamic network topology which is common in
MANETs. In [14][15], authors estimated cost of each path to assess its suitability as BFL in
sensor network. Noticeably, these all approaches focus mainly on link based decision, while in
practice a malicious node too can have sufficient node feature to become a part of route [6].
Interestingly, such malicious nodes could cause major QoS degradation and link outage in later
phase of communication. An improved model was suggested in [14] where node-entropy was
applied to identify best forwarding node (BFN); however its suitability with MANETs can’t be
assured.

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MANETs with fixed buffer size was considered in [16], where authors applied Markov chain
concept to exploit input rate-dependent throughput and packet loss ratio even under dynamic
transmission scenario for route decision. Authors [16] employed queuing concept, end-to-end
delay to assess the impact of deadline time (packet’s end-to-end delay) and buffer size on network
throughput, delay and packet loss. A multicast routing protocol for MANET was developed in
[17] that constituted multiple multicast trees where each multicast tree meets a predefined
bandwidth demands to support bandwidth efficient routing. To achieve reliable transmission
network coding (NC) scheme was taken into consideration. In [18] kNN query concept was
applied to perform query classification under dynamic network topology for better performance.
Authors [18] applied Filling Area (FA) model to process kNN queries that resulted minimum
overhead and search space. Authors [19] applied delay and bandwidth occupancy feature to
perform routing decision in MANET. Residual energy was used as a objective function to
perform routing decision in Ad-hoc On Demand Multipath Distance Vector (AOMDV) routing in
MANET. The path with minimum energy was considered as BFL to perform multipath data
transmission. A few efforts [20] have exploited clustering concept to perform routing decision
where Genetic Algorithm (GA) was applied for Cluster Head (CH) selection. Clustering with
node trustworthiness concept was applied in [21] to achieve reliable data transmission over
MANETs. Weight based clustering was suggested in [22] to perform routing decision. Authors
[22] applied node parameters like inter-node distance, radio range of the node and residual energy
to perform routing decision. Cross layer concept was applied in [23] to augment routing decision
where approached like enhanced Rate Monotonic Algorithm (RMA) and Earliest Deadline First
(EDF) were applied at the network layer of IEEE 802.11 protocol stack. Authors in [24]
recommended cross layer architecture where they considered node density, mobility and MAC
queuing scheme to assist QoS delivery. Similarly in [25] cross layer model was recommended
where optimization measure was incorporated at the network layer by reducing flooding
overhead.
In addition to the network condition awareness based routing decision; authors have made effort
to employ trust based routing in MANETs [26]. In a few efforts [26] watchdog and path rating
models were applied so as to reduce the adverse affect of malicious nodes on network
performance. However, this approach considered each packet drop as misbehaving node which
can’t be generalized in dynamic network conditions where there can be drop due to numerous
reasons as discussed above. Further in [27-29] authors applied acknowledgment-based routing
schemes. However, it [27] suffered signalling overhead due to iterative beaconing and
acknowledgement by each consecutive node in path to the sender as well as receiver for each
packet of data transmission. Though, being a better solution than [27], the model recommended in
[28] could not address the issue of false malicious node detection and route changes that
adversely affected fair-QoS delivery to each participating node. As an optimised solution authors
[29] proposed an Enhanced Adaptive ACKnowledgement (EAACK) protocol to detect
misbehaviour nodes in MANETs by applying DSA and RSA digital signatures. To assess packet
loss rate in MANETs, authors [30] recommended using the Expected Packet Count (EPC) at the
receiving node. Though, this approach was efficient for estimating packet delivery condition and
allied loss rate, it could not rectify the loss problem in the network. In [31] authors applied
received signal strength indicator (RSSI), the link quality indicator (LQI), and the packet
reception rate (PRR) to perform routing decision in WSNs. However, this approach could not deal
with dynamic topology and varying network condition. Authors [32] exploited inter-node
cooperation features to detect malicious nodes in MANETs; however it suffered excessively due
to conflicting node-status update and trustworthiness of the updates provided by neighbouring
nodes. A defence trust model was developed in [33] that focussed on filtering second hand
information by exploiting information like node-confidentiality, deviation and distance. Authors

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[34] performed node’s overhearing monitoring for intrusion identification. They found that
overhearing results into reduced throughput and high latency. Node collaborative reputation based
routing decision was suggested in [35]. In [36], authors recommended the use of node statistics
such as the number of received forwarded packets etc to assess packet drop probability at a node
in MANET.
3. PROBLEM FORMULATION
To ensure QoS provision and reliable data communication over MANETs enabling optimal route
decision or forwarding path selection is of vital significance. Primarily, under mobile network
condition where there is significantly high topological variation estimating the BFN is highly
tedious task. However, to perform BFN selection under mobility maintaining efficient node table,
network and node parameter state information is must. In addition, applying key node information
to characterize suitability of a node to become BFN can also play vital role in QoS centric
communication. In majority of the existing routing protocols authors have applied node
parameters such as residual energy, packet drop per node, link quality, congestion probability etc
as distinct node-parameters to perform routing decision. However, in practice even an interrupting
node can have sufficient node parameters as stated above, but its inclusion in forwarding path
formation can lead premature link-outage, data drop and hence reduced performance. To alleviate
such kind of problems, authors have applied security model where predominant focus has been
made on data security of node security; however to achieve QoS delivery with reliable data
transmission exploiting both network dynamic conditions as well as node’s trustworthiness is
inevitable. Majority of the classical watchdog schemes often undergo issues like overhearing
caused energy exhaustion. The use of network condition aware and trust based model can be of
utmost significance to avoid any improper node consideration during forwarding path selection.
This approach in addition could avoid immature link outage, intentional packet drop caused due
to untrustworthy nodes. As an optimal solution, this research intends to incorporate a distributed
time division-based node and allied link monitoring strategy so as to enable reliable transmission
decision as well as premature link outage avoidance. In this paper both dynamic network
conditions as well as node-trustworthiness have been taken into consideration. In this paper, at
first Micro-Level Network Assessment has been performed that helps in identifying the key
factors causing packet loss and QoS degradation in MANETs. Employing network condition as
well as node-trustworthiness factor, BFN selection has been performed that not only assures
optimal selection of the forwarding node but also avoids the malicious node that strongly
augments QoS delivery and reliable data transmission over MANETs. Key decisive network
condition parameters, factors such as MAC layer information, queue information such as flooding
condition, and rate of link changes etc have been exploited to perform profiling for each node. In
this research three key factors; irregular or improper information exchange at IEEE 802.11 MAC,
queuing overflow and topological variations. Multiple node parameters such as Packet
Forwarding Probability (PFP) at the MAC layer, Success Probability of Data Transmission
(SPDT) of a neighboring node, and Probability of Successful Data Delivery (PSDD) have been
estimated for each node for respective profiling that helps avoiding any untrustworthy node to
become route member. In addition, to assure QoS centric communication over MANET, this
paper proposes a robust evolutionary computing assisted topological optimization model that
exploits node and link availability and connectivity features to achieve dual (supplementary)
disjoint best forwarding paths. Here, the prime motive is to consider only those nodes or links
with maximum availability and minimum connectivity loss while maintaining minimum hops and
shared network component. This approach can efficiently achieve two parallel disjoint forwarding
path with minimum hops (with minimum connected network elements) so as to ensure reliable

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data transmission without imposing any computational overheads. Unlike classical Dijkstra
minimum distance based approach, MNCQM applies the well known evolutionary computing
algorithm Elitist Genetic Algorithm to perform (dual and disjoint) best forwarding path
estimation. Here, the motive is to form two disjoint paths with minimum shared elements and
hops while ensuring that the participating nodes have sufficient or suitable link and/or node
availability and connectivity. This as a result could achieve better performance even under
dynamic topology or varying network conditions.
4. PROPOSED METHOD
The overall design or implementation of the proposed MNCQM routing protocol can be presented
in two consecutive phases. These are:
1. Node Profiling and Trustworthiness Estimation
2. Evolutionary Computing assisted topological optimization and dual-disjoint (best)
forwarding path selection.
The detailed discussion of the proposed MNCQM routing protocol and allied implementation
model is presented in the sub-sequent sections.
4.1 Node Profiling and Trustworthiness Estimation
Identifying the parameters having direct relation to the network performance (here, MANET) can
be vital to design an optimistic routing model. Before designing the proposed routing model, a
snippet of the key parameters influencing MANET’s performance are given as follows:
Undeniably, in MANET’s both dynamic topology as well as vulnerability of getting attacked due
to malicious nodes are the critical factors affecting overall performance. To design a novel and
robust routing protocol for MANETs, in this paper we have critically addressed the constraints
influencing overall performance, especially causing data drop. These factors are:
1. IEEE 802.11e MAC information,
2. Queuing Overflow Condition, and
3. Dynamic Topology or Topological Variations.
A snippet of these key factors and allied solution is discussed in the sub-sequent sections.
4.1.1 IEEE 802.11e MAC information
In practice MANET might undergo packet drop condition at the MAC layer, especially at the
forwarding node. Practically, the prime reasons behind data drop at MAC are obstacle routing
entries or malicious nodes, suddenly imposed congestion, out-of-range from next hop node etc. It
signifies that a well informed condition of the MAC layer of IEEE 802.11 protocol can be vital to
assess data drop and make preventive measure so as to achieve QoS delivery. Observing IEEE
802.11 MAC standard, which is default protocol stack for MANET, a transmitter or forwarding
node transmits targeted data packet and receives a link-layer ACK from the receiver [16].
Considering the significance of link quality towards QoS delivery, authors [16] recommending
transmission of a beacon message or probe packet before transmitting the targeted actual data
packet. In this process, each node required transmitting or broadcasting a probe signal or packet at

7
the interval of 10 seconds. However, such iterative probe packet transmission lead energy as well
as bandwidth exhaustion. Unlike such classical approaches, in our previous paper [41], we
designed a cross layer model where Adaptive Link Quality (ALQ) was obtained from proactive
node table management scheme that enables our routing protocol to retain reliable forwarding
node selection. Though, this approach was efficient to avoid selection of any link-vulnerable node
selection; however could not address the characteristics and activities of a link between two
nodes. Assessing link-characteristics can help performing link-profiling that eventually could
enable optimal Best Forwarding Link (BFL) Selection. In our proposed model, to avoid energy
and bandwidth exhaustion as occurred in [16], we focus on leveraging the beacon signal (say,
HELLO signal) which is already exchanged in the routing activities. Here, each node performs
node feature exchange with its neighbouring node at certain defined interval (here, 10 second).
More specifically, in our proposed routing scheme, each node exchanges dynamic link
information to its one-hop distant neighbour node by exploiting a preset number of beacon
signals. In this process, each node maintains the retrieved beacon message (i.e., HELLO)
pertaining to the on-hop distant neighbouring node. In case a node receives the expected number
of beacon message from its one-hop distant neighbouring node it states that there exists suitable
network-link condition and interference-less condition to make BFL decision. On contrary, in
case a node finds a link behaving irregularly and dropping packets it signifies that the link and
allied node is vulnerable. In addition, in case a node doesn’t receive any beacon message,
specifically the total expected number of HELLO messages, it signifies the presence of certain
link-interference or vulnerabilities. In our proposed MNCQM protocol, addition to the one-hop
distant neighbouring node, the Best Forwarding Node (BFN) too exchanges its dynamic node
information to the neighbouring node that enables reliable BFL selection for QoS centric
communication. Thus, employing this information, a node P can estimate the likelihood whether a
node can transmit data successfully to the destination node Q. Exploring link quality and its
reliability at the link layer between these two nodes can help establishing a secure and fault
resilient transmission. In this paper the Packet Forwarding Probability (PFP) at the MAC layer
has been estimated using (1).
P =
μ ,
μ ,
(1)
In above equation (1), μ signifies the total number of beacon message of HELLO packets
received, while μ states the total expected number of beacon message during transmission time
t , t . In addition to the PFP sensitive routing, we have focussed on assessing “Queuing-
Overflow” to ensure reliable data delivery.
4.1.2 Queuing Overflow Conditions
In typical MANET network, data queues might undergo overflow condition because of the
sudden increased payloads, multiple simultaneous activities and buffer consumption. In addition,
the simultaneous node activities such as functional-as-routers for multi-hop forwarding too
impose queuing overflow. When the route-traffic exceeds a suitable limit or threshold its results
into limited data traffic, low data rate transmission that eventually causes QoS violation [31][32].
Practically, the node-queuing overflow can be visualized in terms of data drop by neighbouring or
forwarding node, whose selection as BFN can lead unreliable path (say, BFL) selection. Such
nodes can cause link-outage of data drop abruptly. Thus, identifying such misbehaviour node can
help avoiding any probability of link-failure or data loss. With this motive, in this paper
identifying a forwarding node with packet dropping behaviour, it has been marked as a

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misbehaving node which has been further excluded to become a part of BFL. Practically,
exceedingly high data traffic can cause congestion in a channel or over a link that eventually
results into queuing overflow on certain node. In addition to the above stated vulnerable node
identification we have examined Traffic Load Intensity (TLI) [33] of a node that signifies its
ability to accommodate data traffic without imposing any significant data drop. In MNCQM
routing model, we have considered CLI as the decision variable that estimates the Queue-status at
the one-hop distant neighbouring node signifying its suitability to forward data without imposing
data drop and retransmission. Here, the source node monitors the load traffic statistics proactively
using Proactive Node Table Management (PNTM). In MNCQM, to estimate the load condition
and congestion each forwarding candidate-node or neighbouring node samples its Interface
Queue Length (IQL) at the MAC layer of IEEE 802.11e and transmits it to the transmitter node as
a part of beacon acknowledgement or HELLO message.
Consider i be the one-hop distant neighbouring node and l be the value of jth sample presenting
queue length at current time-instant. Let, L be the total number of queue-length samples retrieved
over the expected time period. In such case, the average traffic load at a node can be estimated
using (2).
TL =
1
L
l
(2)
Consider, l ! be the maximum IQL of a node at its IEEE 802.11e MAC layer. Thus, the total
Traffic Load Density (TLD) at that node can be estimated using (3).
TLD =
TL
l !
(3)
In our proposed MNCQM protocol we have exploited the dynamic value of TLD to estimate the
Success Probability of Data Transmission (SPDT) at a neighbouring node i (i.e., P#$ _ ).
Mathematically, it is obtained by (4).
P#$ _ = 1 − TLI( (4)
As stated in above section, since the probability of successful data transmission is related to TLD,
it can be inferred that a significantly small value of TLD can influence packet forwarding
probability. With this motive, in this paper we have focussed on selecting a neighbouring node
with suitable TLD. Noticeably, relatively higher node density causes more traffic in the network
as well as higher TLD for the neighbouring (forwarding) nodes. This as a result could reduce the
eventual packet forwarding success probability P#$ _ . In MANETs it becomes inevitable to
consider security issues, especially when certain node starts behaving unexpectedly and violates
the protocol. Such nodes can often cause packet drop and hence degraded network performance.
In some cases, it has been found that in MANETs the malicious nodes often lies or mislead about
its queuing condition or allied network status. For instance, an intruder can abruptly state its
queue is completely occupied and full signifying no bandwidth available to accommodate traffic
data. This issue often leads improper bandwidth utilization and QoS violation. Alleviating such
malicious nodes can help retaining reliable BFL to achieve QoS transmission over MANETs.
MNCQM routing model characterizes each neighbouring nodes and profiles it in above stated
terms to remove such nodes becoming a part of BFL and thus achieves optimal performance even
under dynamic topology and network changes.

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4.1.3 Dynamic Topology
In majority of the classical trusts-based routing scheme researchers have focussed on alleviating
the issue of overhearing to characterize the trustworthiness of a node. In these approaches,
transmitter node forwards its data to the next hop node only after assuring that it doesn’t cause
overhearing and resulting re-transmission probability to the one-hop distant nodes. This feature
helps in enabling reliable and resource efficient data transmission to the sink node. In case a
transmitter is capable of overhearing the packet forwarding from the one-hop BFN node, it states
fair and successful interaction, else identified as malicious node. The situation when a transmitter
node is not able to overhear the re-transmission of its packet effectively even though it took place,
or the sink node is unreachable because of the stale routing information, this forwarding node is
identified as malicious node and is avoided from becoming part of the BFL formation. In
addition, node mobility or resulting topological variations in MANETs could impose numerous
vulnerabilities when making BFN and/or BFL selection. In such case assessing trustworthiness of
the each participating node is vital to achieve QoS provision [34]. Practically, a node can assess
trustworthiness of the neighbouring node based on the rate of link changes [34]. In MNCQM, we
have used the Rate of Link Change (RLC) to assess node trustworthiness and its relation to
achieve higher QoS provision. Here, RLC at certain node i has been estimated using equation (5).
η = γ + ε (5)
In equation (5), the variable γ$ states the Rate of Link Arrival (RLA), while ε$ signifies Rate of
Link Outage (RLO) or breakage rate by ith node [35]. Considering the suggestions [35] where the
maximum RLA γ _ ! is equivalent to the RLO, we have derived the maximum RLC (ε _ ! ) as
γ$ ! + ε _ ! = 2. σ . Thus, the RLC can be obtained using (6).
η =
γ + ε
2. σ
(6)
Now, estimating the value of the above derived equation (6), MNCQM estimates the highest
Probability Of Successful Data Delivery (PSDD) (or forwarding) by a node using (7).
P1 = 1 − η (7)
Observing (7), it can be found that the higher RLC signifies more dynamic neighbourhoods that
could adversely affect the probability of successful data transmission (or forwarding) by a node.
In such case, MNCQM considers a node with moderate or low RLC to constitute network
topology.
4.2 Evolutionary Computing assisted topological optimization and dual-disjoint
(best) forwarding path selection
So far in the previous sections, we focussed on assessing nodes for their reliability and
trustworthiness; however in MANETs selecting best forwarding node based on network
conditions awareness is must. With this motive, in this paper dual object function has been taken
into consideration where the first intends to obtain the reliable node for network planning, while
another focuses on achieving optimal network topology configuration and the Best Forwarding
Path (BFP) formation. The previous section mainly addressed identifying the reliable or
trustworthy nodes (say, node profiling) to be considered for network planning. This section

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mainly discusses the second objective of this research, i.e., to perform network condition aware
routing decision. To achieve it, we have intended to exploit node features so as to identify a node
with minimum hop, optimal bandwidth use, minimum energy consumption and higher network
availability. To assure reliable communication over dynamic-topology MANET, we have
designed a novel Dual-Route Concept (DRC) that possess two parallel routes from source to
destination, while retaining second route as “Standby-Solution”. This second route also called
Remote Front-End Concentrator (RFEC) provides alternate path in case of any fault condition
using logical AND gate configuration. With this configuration the data transmission can be
continued till at least one path is functional and it makes overall communication system robust
and reliable.
Being a network condition aware routing model, we consider dynamic node characterization in
terms of “Availability, Unavailability, Connectivity and Connectivity Loss”. Here, availability
signifies the time for which a node or allied link can be active and functional. On contrary,
unavailability refers the duration for which link or node remains dead. Similarly, connectivity
refers the time for which the node remains connected, while connectivity loss refers the time
fraction during which the node remains detached to the allied RFEC. Typically, connectivity loss
is defined as the likelihood of a node being detached to the RFEC at certain random period.
Observing these two factors, it can be found that to achieve reliable data transmission, retaining
higher connectivity and availability is must, and statistically these network parameters can be
exploited to obtain probabilistic behaviour of a node for future decision. Exploring in depth it can
be found that the node behaviour or characteristics in MANET often varies due to movement,
relative location, changing node parameters etc. This variation is somewhere related to hop-
counts and availability of the link. Considering this fact, in this paper, as second objective we
have developed a network optimization model using heuristic concept that intends to maintain
maximum connectivity or availability, minimum hops etc.
4.2.1 Hop-Count Optimization
Selecting nodes with the minimum number of hops can enable network reliable as well as
computational efficient. Considering this fact, our proposed routing protocol intends to retain
optimal connectivity while maintaining minimum hops and disjoint paths for routing decision.
Unlike major exiting approaches where Dijkstra algorithm is used to perform the shortest path
selection, we have developed an evolutionary computing (EC) assisted enhanced shortest path
planning model. This approach enables optimal path formation from one node to another in a
graph by performing pruning of the complete set of paths. Typically, to perform path formation,
Dijkstra algorithm increases the selected paths (hop-counts) by supplementing a new hop to any
neighboring node. This process applies all connecting (neighbouring) nodes and hence constructs
multiple paths. During pruning in case multiple paths connects or meets at the same intermediate
node, then the two BFPs are selected and others are removed. This approach enables selection of
the single best path with better connectivity and hop counts and hence is better than classical
Dijkstra algorithm. Additionally, this approach reduces the search space (i.e., the number of nodes
to be searched in the next steps) that makes overall computation efficient and resource efficient.
In addition to the hop-count optimization, we have focussed on achieving higher availability to
ensure QoS provision. A snippet of the proposed no-disjoint availability enhancement scheme is
given as follows:

11
4.2.2 No-Disjoint Availability Optimization
To achieve (no) disjoint availability optimization, in our proposed routing model the two paths
possessing maximum availability are identified. Unlike hop-count optimization, here we focus on
exploiting node and link availability information (except the joint node). Once performing
shortest path planning and network (topology) optimization, the path with the minimum
computational cost is identified (the lower node or components would result into lower cost).
However, practically due to the stochastic nature of the availability, total path availability can not
be the sum of the availability of comprising nodes or elements. In such case, a first order
approximation method can be applied to obtain path/node unavailability (as the sum of
unavailability of comprising node or elements), which can further be used to perform routing
decision. Thus, considering these two objectives, in this paper a Multi-Objective Optimization
(MOO) scheme is developed using Elitist Genetic Algorithm (EGA) that intends to identify best
two disjoint paths with minimum unavailability and higher reliability. To achieve it in this paper
EGA has been applied in conjunction with Monte Carlo simulation that enables inculcation of the
dynamic topology and network uncertainties. The detailed discussion of the proposed MOO
optimization method is given in the sub-sequent sections.
4.2.3 Bayesian Network (BN)
To model the network and its probabilistic behaviour we have applied Bayesian Network (BN)
model, where a direct acyclic graph is formed. In this model each node in the graph signifies a
random variable, where the direct links are selected in such manner that the (joint) cumulative
probability distribution of all comprising nodes (say, variable) can be estimated as the product of
the conditional likelihood of each variable in its graph. When such correspondence are satisfied
between the structure of the graph and the cumulative probability, the graphical model is stated as
BN [37][38].Once obtaining the key graph structure and allied conditional probability of each
node the BN is formed, it becomes easy to estimate the probability (probable values) of the
variables in the graph. Considering our research objective where the focus is made on developing
a BFP with higher connectivity, BN avoids deriving any sophisticated mathematical formulations
for node-connectivity as a function of node availability and link quality. With this motive, in our
proposed routing model BN scheme has been considered as the probabilistic estimation model for
network routing optimization. BN based MANET can be represented in terms of multi-layer
hierarchical structure comprising node and links, branches, paths and connectivity. A snippet of
these variables is given as follows:
Table 1. Snippet of the variables
Variable Significance
Node and
Links
BN node as variable 1 can be only when the node can communicate or is
available. If a node is not available for communication it is labelled as 0.
Branches BN node is 1 only when connected nodes and the links connecting the
nodes are available.
Paths In this layer of BM, each node is responsible for providing a path
connecting node 0 to the RFEC.
Connectivity It states the connectivity between the selected nodes.
Here, one assumption that the availability of a node is often independent of the availability of
other node. Similarly, availability of a link can be independent of the availability of the other
links. Typically in BM, the probability of the first layer is specified by availability of each node

12
or link, while the second and third layers assume a deterministic approach stating that any branch
or path can work only when associated elements functions. In such case, it gives the allied
conditional probabilities as 1 or 0. In the same way the path variables can be selected. The last or
the fourth layer variable signifies the service state of node signifying 1 when the node is
connected to RFEC and 0 otherwise. Considering above discussion it can be inferred that the state
of all variables can be defined as the function of the variables in lower layers and hence
conditional probability values can also be selected other than 0 or 1. Once constructing the BN
the node connectivity and allied network conditions are obtained. Observing the state of the node
or link connectivity and availability has been obtained. This information can also be applied to
estimate the link-outage probability estimation. In addition, it can enable learning different rules
and allied associations amongst the pattern or network data. The detailed discussion of the link
and node availability/connectivity estimation is given in the sub-sequent sections. Though, BN
avoids deriving any sophisticated mathematical model for link or node connectivity, however a
snippet of the mathematical models involved is given as follows:
4.2.4 Optimal Path Availability Estimation
In MANET, a route ℛ or path connecting source n4 to the destination n5 can be the evolving
sequence of nodes 6 = {n4 … … . n5} which are connected with respective link (quality) order,
given as ℰ = {e4, , … … . e5 ,5}.
Here, the variable e , < states the link in between the node n and node n < . As already stated, a
route or path can exist (say, available) only when all connected nodes and constituting links are
available, and hence it can be written as (8).
A ℛ = > ?@
5
4
An B > ?
5
C 4
eC,C< (8)
Now, the unavailable path can be obtained as (9).
U R = 1 − A R = 1 − > A@
5
4
An B > A AeC,C< B
5
C 4
(9)
Typically, in current day scenarios with advanced communication paradigm, link or node
unavailability cases are less and therefore “First-Order Approximation (FOP) can be vital. Now,
ignoring in (9) each product with multiple unavailability cases, node or link unavailability can be
derived as (10).
U ℛ =1-∏ 1 −5
4 U@(n ∏ 1 − U5
C 4 eC,C<
≈ ∑ U@
5
4 An B + ∑ U5
C 4 eC,C<
(10)
Equation (10) signifies an additive unavailability paradigm in which the overall influence of
incorporating additional node augments an unavailability increment that predominantly relies on
the unavailability of the supplemented node or associated link. In practice, such additive
paradigms can be more reliable as compared to the non-additive ones due to the issues pertaining
to the finite precision terms in the form1 - I, (tentative value near 10 J
). Furthermore, such
additive paradigm enables use of Dijkstra algorithm to identify the most available path.

13
4.2.4.1 Node Connectivity
It refers the likelihood that minimum one path in between source to destination is functional.
Considering our proposed model, any node n4 can be connected to the RFEC only when any of
these criteria is satisfied.
1. Node n4 is available.
2. Node C is available.
3. Minimum one of the paths from n4 to destination is functional or available.
As already discussed to retain QoS delivery over MANET, our proposed routing protocol
hypothesizes that the individual node possesses two distinct (disjoint) paths connecting to the
RFEC. In case of completely disjoint paths where it doesn’t share any node or link, the (node)
connectivity can be obtained using following method:
Consider that the paths for a node n4 be ℛ4, …….ℛK and ℛC
LLLL be the nodes and links from
ℛC (excluding terminals). Then
C n4 = ? n4 ? NO ℛC
LLLL
K
C 4
P ? C
(11)
In (11), the second component signifies the availability of the disjoint set of sub-paths. Now,
considering the availability of the terminal nodes the connectivity of n4 can be lost in case all
routes ℛC
LLLL fail. Now, hypothesizing link or allied node’s failure as independent -independent,
availability can be obtained using (12).
? NO ℛC
LLLL
K
C 4
P = 1 − > U
K
C 4
ℛC
LLLL
(12)
Now, considering {nC,4, … … … . nC, fC} as the set of nodes and {eC, ,R … . . , nC, fC , fC} as the
corresponding links from path k in such manner that nC,4 = n4 y nC, fC = C, then applying
equation (9), we can estimate the link or node unavailability as equation (13).
U ℛC
LLLLL = 1 − ? ℛC
LLLLLLL
=1 − ∏ ?@
5T
nC, ∏ ?
5T
4 (eC, , < )
(13)
Now, using equations (11), (12) and (13), connectivity of a node n4 can be obtained as (14).
C n4 = ? n4 ? C
× N1 − > N1 − > ?@
5T
AnC, B > ?
5T
4
eC, , < P
K
C 4
P
(14)
As already stated to achieve reliable and robust transmission over MANETs selecting a path with
minimum shared elements can be vital. With this motive we estimate the total shared elements in
each path.

14
4.2.4.2 Shared elements per path estimation
This is the matter of fact that connectivity of a node with two non-disjoint routes can be obtained
by decoupling the role of shared elements and allied disjoints nodes or links. Consider that ℛ4
and ℛ be the two supplementary paths then the connectivity can be obtained using (15).
C n4 = > A@
5
VWX
An B > A
5
CVWY
eC,C<
×
Z
[

1 − ]1 − > A@ An4, B > A
VWY,^VWX,^
Ae4, , < B_
× ]1 − > A@ An , B > A
VWY,VWX,
Ae , , < B_
`
a
b
(15)
In (15), the variables Φ@ and Φ signify the sets of shared elements (i.e., node and links,
correspondingly). Similarly, the variables Φ@, and Φ , states the sets of non-shared elements
from path i. Now, substituting availability products with 1st order approximations defined in the
form of respective unavailability, the connectivity loss can be estimated using (16) and (17).
L n4 = 1 − C n4 (16)
L n4 ≈ U@
5
VWX
An B + U
5
CVWY
AeC,C< B
+ N U@
VWX,^
n4, + U
VWY,^
e4, , < P
× N U@
VWX,
n , + U
VWY,
e , , < P
(17)
Considering the fact that non-shared links don’t contribute loss probability of the node
significantly, it is obtained using (18)
L n4 ≈ U@
5
VWX
An B + U
5
CVWY
AeC,C< B
(18)
Now, observing (17) and (18) it can be found that the most reliable pair would have two distinct
disjoint paths, as the shared or common nodes or links possess a first-order influence (18)
exhibiting that even a single fault in any shared element can disrupt both paths or link-outage and
hence QoS violation. However, the most reliable pair might possess non disjoint paths due to no
supplementary non-disjoint node or link and the low presence of disjoint paths. In this case the

15
routes with certain common links might retain high levels of reliability and availability. Unlike
classical approach, in this paper we intend to perform routing decision only with the nodes with
the minimum connectivity loss probability. With this motive, we have applied a MOO model that
intends to estimate the paths with minimum hop counts as well as minimum Connectivity Loss
(CL).
4.2.4.3 Elitist Genetic Algorithm (EGA) based Best Forwarding Path Selection
Unlike classical analytical model, in this paper we have applied Elitist Genetic Algorithm (EGA)
that performs MOO to achieve best forwarding paths for reliable and QoS centric routing over
MANETs. In this method the proposed EGA model intends to reduce the connectivity loss as
defined in (10). In our proposed approach EGA algorithm considers both connectivity loss and
number of hops as objective function to perform the best (non-disjoint) forwarding paths
estimation, and thus simulates the problem of MOO. Our proposed EGA method intends to
achieve a quasi-optimal solution by retaining maximum connectivity and link reliability. EGA
continues retrieving suitable forwarding paths by searching over a set of feasible paths, which are
continuously constructed by supplementing a new hop and estimating respective availability and
connectivity. In this method, EGA terminates when the likelihood of estimating a suitable or
better paths (two non-disjoint paths) is very low.
The overall routing optimization method can be illustrated using following process-sequences:
Step-1 Network Initialization
1.1. Perform node profiling using Packet Forwarding Probability (PFP) at the MAC layer,
Success Probability of Data Transmission (SPDT) of a neighboring node, and Probability of
Successful Data Delivery (PSDD) criteria and isolate malicious or non-trustworthy nodes.
1.2. Form a BN with multiple nodes and allied elements.
1.3. Assign n4 as the inception node and n5 as the RFEC. Consider S4 = {n4 } be the functional
or active paths.
Step-2 Identify the incomplete path having not connectivity with RFEC node in ef .
2.1. Select an incomplete path R* ϵ SC .
2.2. Estimate all possible paths retrieved by prolonging R* from its terminal node by appending
or adding a single hop.
2.3. Estimate SC
h
by substituting R* in SC by the extended paths.
2.4. Estimate the probability of link outage of all the new path pairs by means of the proposed
Bayesian Network.
2.5. Perform pruning by setting SC< as the result of eliminating all suboptimal paths in SC .
Step-3 Use BFP to transmit data from source to destination
3.1. Form the best forwarding path from the identified two non-disjoint paths and initiate data
transmission between source and destination.
The simulation results obtained and their respective inferences are presented in the sub-sequent
section.

16
5. SIMULATION RESULTS AND DISCUSSION
In this paper an optimistic vision was made to ensure MANET secure and reliable while giving
the specific focus to augment QoS delivery. Observing major existing works, it can be found that
most of the at hand protocols either focus on network security or on performance enhancement;
while to achive a cumulatve optimal solution maintainig balance between security as well as
performance is must. This paper focusses on assessing node’s reliability based routing decision as
well as node or network parameter sensitive routing decision. In other words, the proposed
MNCQM routing protool can be stated as a dual-optimization measure where focus was made at
first to ensure that no untrustworthy node is participating or available in routing table, while in the
next phase an evolutionary computing assisted network topological management scheme was
developed so as to ensure reliable data transmission. In the first phase of work, the protocol
exploited different node behaviour to assess its suitability to becomes topology, while in the
ascending phase node connectivty and availability were considered to design a most reliable best
forwarding path. In addition, the focus was made on maintainig minimum number of hops so as to
reduce both vulnerability as well as computational cost. Towards this objective Elitist Genetic
Algorithm (EGA) was developed which was executed over Baysian based topology to estimate
dual-best forwarding paths with minimum shared components. Here, the prime objective was to
construct two disjoint paths with higher connectivity and availability so that in case of any
probable node or link failure the supplimentary could ensure timely data delivery without
executing network discovery phase. This as a result saves computation, resource as well as
reduces delay. Noticeably, in the proposed method the key significance of dual path strategy is to
ensure reliable communication while maintaining minimum hops, minimum connectivity-loss and
maximum link or node availability. The overall proposed routing protocol was developed using
well known Network Simulator tool named NS2. The proposed MNCQM routing protocol has
been implemented as enhancement of the classical AODV routing protocol with native IEEE
802.11 standard protocol stack. Noticeably, to assess efficacy of our proposed model during
simulation compromising nodes as well as node death condition was applied. The predominant
motive was to assess proactive routing decision by the proposed routing protocol. Some of the
key network simulation parameters are given in Table 2.
Table 2. Simulation Environment
Parameter Value
MAC IEEE 802.11
PHY 802.11PHY
Antenna Omni-directional
Radio Range 200
Number of nodes 10,20,30,40,50,60
Efficiency of RF power amplifier 0.47
Link margin 40 dB
Gain factor 30 dB
Power density of AWGN channel -134 dBm /Hz
Noise Figure (Receiver) 10 dB
Carrier frequency 2.5 GHz
BER performance 10 i
Transmitter circuit power consumption 98.2 mw
Receiver circuit power consumption 112.6 mw
Antenna gain of Transceiver 5 dB

17
Routing table management Proactive
Transmission rate 10-512 kb/sec
Packet size 512 kb
Routing Protocol Native AODV
MNCQM
The overall performance analysis has been performed in reference to the proactive routing
protocol AODV in terms of Packet Delivery Ratio (PDR), Packet Loss Ratio (PLR), Energy
Consumption, Delay and bandwidth consumption. A snippet of the results obtained and their
inferences is given as follows:
Figure 1 presents the comparative performance of our proposed MNCQM routing protocol and
native AODV protocol. Observing the results it can be found that the proposed routing model
outperforms classical AODV. As stated above our proposed MNCQM routing protocol at first
identifies compromizing nodes and dead nodes based on different node parameters or
characteristics like Packet Forwarding Probability (PFP) at the MAC layer, Success Probability of
Data Transmission (SPDT) of a neighboring node, and Probability of Successful Data Delivery
(PSDD) which enables it to avoid such untrustworthy nodes to be a part of route or tranmission
path. During communication, MNCQM assesses link or node quality including node connectivity
and availability (or link connectivity and availability) to identify dual-disjoint paths between
source and desitnation node. This approach enables our proposed MNCQM routing protocol to
exhibit more reliable data transmission than the native AODV routing protocol. This efficacy can
be observed through the results obtained (Figure 1 and Figure 2). Here, MNCQM routing protocol
exhibits PDR upto 100% which is higher than the native AODV protocol (PDR-84%). Similarly,
PLR performance to affirms robustness of our proposed MNCQM routing protocol over classical
AODV routing approach. Observing above results, it can be found that the proposed MNCQM
routing protocol exhibits better even with increase in nodes or network density. Interestingly, in
Figure 1 initially it exhibits low PDR with lower number of nodes that could be caused due to
lack of sufficient nodes in between source and destination with higher inter-node distance. With
increase in node density MNCQM finds sufficient nodes (say, neighbouring nodes) to perform
EGA based forwarding path estimation followed by data transmission.
Figure 1. Packet Delivery Ratio (%) Figure 2. Packet Loss Ratio (%)
Figure 3 presents delay performance by the proposed MNCQM routing protocol, where it can be
found that it outperforms classical AODV because of minimum retransmission possibility and
higher PDR. In other words, MNCQM assures reliable transmission and hence avoids
retransmission probability. In addition, it avoids iterative network discovery during any link

18
outage (due to pre-established supplementary or disjoint supplementary path) probability and
therefore the delay incurred is very less.
Figure 3. Delay performance (ms) Figure 4. Energy Consumption (mJ)
The impact of such robustness can be easily visualized in Figure 4, where MNCQM has exhibited
lower energy consumption as compared to native AODV protocol. Figure 5 presents the
bandwidth utilization by MNCQM where it supersedes native AODV. This is because of link or
network adaptive routing decision and minimum communication overheads. Typically overheads
impose routing protocol to undergo resource or spectrum exhaustion, MNCQM avoids such
complexity and hence preserves bandwidth significantly. Moreover, as it avoids iterative
signaling cost during alternate path formation, its bandwidth efficacy can be hypothesized
affirmatively.
Figure 5. Bandwidth Utilization (kbps)
Finally, the overall performance analysis is summarized in table 3. It clearly indicates that there is
greater improvement in above discussed parameters with MNCQM over AODV.

19
Table 3. Comparative Analysis
Parameter AODV MNCQM Percentage of
Improvement of the
MNCQM
Packet Delivery Ratio 84% 100% 16
Packet Loss Ratio 15% 0% 15
Delay 8 ms 4 ms 50
Energy Consumption 1.1 mJ 1 mJ 91
Bandwidth Utilization 220 kbps 440 kbps 50
6. CONCLUSION
Considering the significance of a novel and robust routing protocol for QoS centric MANETs, in
this paper multi-objective optimization with hierarchical enhancement effort was considered. To
achieve it, the focus was made on ensuring topology formation only with reliable or trustworthy
nodes and then constituting dual disjoint best forwarding path estimation while maintaining
higher node and link connectivity as well as link availability. In addition, this research developed
a novel evolutionary computing based shortest path identification scheme with higher availability
and minimum connectivity loss. Such robustness can be of vital significance when considering
that with classical shortest path models to constitute dual best forwarding path there can be
common nodes or links (say elements) that in case of adversaries could force entire network to
stop communication and hence can degrade QoS assurance. On contrary, MNCQM avoids
common network elements even assuring minimum hops, high connectivity and high availability
that eventually strengthened it to exhibit higher packet delivery ratio, minimum packet loss,
minimum delay and minimum energy consumption. Undeniably, the use of Elitist Genetic
Algorithm (EGA) for the considered multi-objective optimization could have contributed
significantly to perform dual disjoint best forwarding paths for QoS centric communication over
MANETs. Summarily, the proposed MNCQM routing protocol can be stated as an optimistic
routing approach focused on assuring reliable as well as computational efficient topological
planning to accomplish QoS centric communication over MANETs. The simulation results have
exhibited that the proposed routing protocol can enable better performance in terms of packet
delivery ratio, packet loss, delay, bandwidth consumption, energy exhaustion that affirms its
suitability with real-time communication or routing purposes. One noticeable robustness of the
proposed routing protocol is that it avoids dependency on a single BFN based routing decision
that in case of node or link failure could cause QoS degradation. On contrary, MNCQM provides
optimized supplementary path with no-common network elements and hence can guarantee
successful data delivery. In future in addition to the link connectivity and availability, node
dynamic characteristics such as packet injection rate, also called packet velocity, congestion
probability etc can be used to make best forwarding decision.

20
REFERENCES
[1] S. Corson and J. Macker, “Mobile Ad hoc Networking (MANET): Routing Protocol Performance
Issues and Evaluation Considerations”, IETF WG Charter, http://www.ietf.org/html.charters/manet-
charter.html, January 1999.
[2] Z. Iqbal, S. Khan, Amjad Mehmood, Jaime Lloret, and Nabil Ali Alrajeh “Adaptive Cross-Layer
Multipath Routing Protocol for Mobile Ad Hoc Networks” Hindawi Publishing Corporation Journal
of Sensors Volume 2016, Article ID 5486437, 18 pages.
[3] C. T. Calafate, M. P. Malumbres, J. Oliver, J. C. Cano and P. Manzoni, "QoS Support in MANETs: a
Modular Architecture Based on the IEEE 802.11e Technology," in IEEE Transactions on Circuits and
Systems for Video Technology, vol. 19, no. 5, pp. 678-692, May 2009.
[4] Z. Li and X. Yang, "A Reliability-Oriented Web Service Discovery Scheme with Cross-Layer Design
in MANET," 2016 IEEE International Conference on Web Services, San Francisco, CA, 2016, pp.
404-411.
[5] S. V. Sangolli and J. Thyagarajan, "An efficient congestion control scheme using cross-layered
approach and comparison of TCP variants for mobile ad-hoc networks (MANETs)," 2014 First
International Conference on Networks & Soft Computing, Guntur, 2014, pp. 30-34.
[6] P. Samar and S. B. Wicker, “On the behavior of communication links of a node in a multi-hop mobile
environment,” in proceedings 5th ACM Intl. symposium on Mobile ad hoc networking and
computing, 2004.
[7] D. Chen and P. K. Varshney, “QoS support in wireless sensor networks: a survey”, International
Conference on Wireless Networks, ICWN '04, Las Vegas, USA, June 2004, pp. 227-233.
[8] F. Xia, “QoS Challenges and opportunities in wireless sensor/actuator networks”, Sensors 2008, vol.8,
no.2, 2008, pp. 1099-1110.
[9] Y.J. Li, C.S. Chen, Y.Q. Song and Z. Wang, “Real-time QoS support in wireless sensor networks: a
survey”, 7th IFAC International Conference on Fieldbuses and Networks in Industrial and Embedded
Systems, FeT’07, Toulouse, France, 2007.
[10] H. Alwan and A. Agarwal, “A Survey on Fault Tolerant Routing Techniques in Wireless Sensor
Networks”, in proceedings of the Third International Conference on Sensor Technologies and
Applications, Athens/Glyfada, Greece, 2009, pp. 366-371.
[11] K. Sohrabi, J. Gao, V. Ailawadhi, and G. Pottie, “Protocols for self organization of a wireless sensor
network,” IEEE Personal Communications, vol. 7, no. 5, 2000, pp. 16–27.
[12] K. Akkaya and M. Younis, “An Energy-Aware QoS Routing Protocol for Wireless Sensor Networks”,
in proceedings of the 23rd International Conf. on Distributed Computing Systems Workshops, 2003,
pp. 710-715.
[13] J. Chen, R. Lin, Y. Li and Y. Sun, “LQER: A Link Quality Based Routing for Wireless Sensor
Networks”, Sensors, vol. 8, 2008, pp.1025- 1038.
[14] B. C. Villaverde, S. Rea and D. Pesch, “Multi- objective Cross-Layer Algorithm for Routing over
Wireless Sensor Networks”, Third International Conference on Sensor Technologies and
Applications, Athens/Glyfada, Greece, 2009, pp. 568-574.

21
[15] P.A. Abdul Saleem, Dr. Naveen Kumar “Cross Layer Design Approach in Wireless Mobile ADHOC
Network Architecture” International Journal of Advanced Research in Computer and Communication
Engineering Vol. 2, Issue 3, March 2013.
[16] Y. Fang, Y. Zhou, X. Jiang and Y. Zhang, "Practical Performance of MANETs Under Limited Buffer
and Packet Lifetime," in IEEE Systems Journal, vol. 11, no. 2, pp. 995-1005, June 2017.
[17] Y. H. Chen, E. H. K. Wu and G. H. Chen, "Bandwidth-Satisfied Multicast by Multiple Trees and
Network Coding in Lossy MANETs," in IEEE Systems Journal, vol. 11, no. 2, pp. 1116-1127, June
2017.
[18] Y. Komai, Y. Sasaki, T. Hara and S. Nishio, " ${k}$ Nearest Neighbor Search for Location-
Dependent Sensor Data in MANETs," in IEEE Access, vol. 3, pp. 942-954, 2015.
[19] R. Jia et al., "Optimal Capacity–Delay Tradeoff in MANETs With Correlation of Node Mobility," in
IEEE Transactions on Vehicular Technology, vol. 66, no. 2, pp. 1772-1785, Feb. 2017.
[20] S. Sett, P. Kumar Guha Thakurta “Effect of optimal cluster head placement in MANET through multi
objective GA”, In IEEE International Conference on Advances in Computer Engineering and
Applications(ICACEA), pp. 832-837, 2015.
[21] D. Barman Roy Rituparna Chaki “MCBHIDS: Modified layered cluster based algorithm for black
hole IDS”, In Annual IEEE India Conference (INDICON), pp.1-6, 2013.
[22] Neha Gupta, Rajeev Kumar Singh, Manish Shrivastava, “Cluster formation through improved
weighted clustering algorithm (IWCA) for mobile ad-hoc networks”, Tenth IEEE International
Conference on Wireless and Optical Communications Networks(WOCN), pp. 1-5, 2013.
[23] M. Rath, B. Pati and B. K. Pattanayak, "Cross layer based QoS platform for multimedia transmission
in MANET," In 11th International Conference on Intelligent Systems and Control (ISCO),
Coimbatore, 2017, pp. 402-407.
[24] M. A. Gawas, L. J. Gudino and K. R. Anupama, "Cross layer multi QoS metric routing for
multimedia traffic in 802.11E over MANETs," 2016 Eighth International Conference on Ubiquitous
and Future Networks (ICUFN), Vienna, 2016, pp. 582-587.
[25] Z. Li and X. Yang, "A Reliability-Oriented Web Service Discovery Scheme with Cross-Layer Design
in MANET," 2016 IEEE International Conference on Web Services (ICWS), San Francisco, CA,
2016, pp. 404-411.
[26] S. Marti, T. J. Giuli, K. Lai, and M. Baker, “Mitigating routing misbehavior in mobile ad hoc
networks,” in proceedings of the 6th annual ACM Intl. conference on Mobile computing and
networking, 2000.
[27] K. Liu, J. Deng, P. K. Varshney, and K. Balakrishnan, “An acknowledgment-based approach for the
detection of routing misbehavior in MANETs,” IEEE Transactions on Mobile Computing, 6(5):536-
550, 2007.
[28] T. Sheltami, A. Basabaa, and E. Shakshuki, “A3acks: adaptive three acknowledgments intrusion
detection system for MANETs,” Journal of Ambient Intelligence and Humanized Computing,
5(4):611–620, 2014.
[29] E. M. Shakshuki, N. Kang, and T. R. Sheltami, “Eaack—a secure intrusion-detection system for
MANETs, ” IEEE Transactions on Industrial Electronics, 60(3):1089–1098, 2013.

22
[30] D. S. De Couto, D. Aguayo, J. Bicket, and R. Morris, “A high-throughput path metric for multihop
wireless routing,” Wireless Networks, 11(4):419-434, 2005.
[31] B. Shebaro, D. Midi, and E. Bertino, “Fine-grained analysis of packet losses in wireless sensor
networks,” in 11th IEEE Intl. Conference on Sensing, Communication, and Networking (SECON),
2014.
[32] S. Buchegger and J. L. Boudec, “Performance analysis of the confidant protocol,” in proceedings of
the 3rd ACM Intl. conference on Mobile ad hoc networking & computing, 2002.
[33] A. Shabut, K. Dahal, S. Bista, and I. Awan, “Recommendation based trust model with an effective
defence scheme for MANETs,” IEEE Transactions on Mobile Computing, 14(10):2101–2115, 2015.
[34] J. Parker, J. Undercoffer, J. Pinkston, and A. Joshi, “On intrusion detection and response for mobile
ad hoc networks,” in IEEE Intl. Conference on Performance, Computing, and Communications, 2004.
[35] P. Michiardi and R. Molva, “Core: a collaborative reputation mechanism to enforce node cooperation
in mobile ad hoc networks,” in Advanced Communications and Multimedia Security, Springer, 2002.
[36] F. Anjum and R. Talpade, “Lipad: lightweight packet drop detection for ad hoc networks,” in 60th
IEEE Vehicular Technology Conf., volume 2, 2004.
[37] F. V. Jensen, Bayesian Networks and Decision Graphs. New Jersey: Springer-Verlag, 2001.
[38] E. Castillo, J. M. Gutierrez, and A. S. Hadi, Expert Systems and probabilistic Network Models. New
York: Springer-Verlag, 1997.
[39] T. H. Sureshbhai, M. Mahajan and M. K. Rai, "An Investigational Analysis of DSDV, AODV and
DSR Routing Protocols in Mobile Ad Hoc Networks," 2018 International Conference on Intelligent
Circuits and Systems (ICICS), Phagwara, pp. 281-285, 2018.
[40] Saghian, Malihe, Ravanmehr, Reza, “Efficient QoS-aware Middleware for Resource Discovery in
Mobile Ad Hoc Networks”, Adhoc & Sensor Wireless Networks, Vol. 43 Issue 3/4, p283-312,2019.
[41] Shashi Raj K, Siddesh G K,"QoS Oriented Cross-synch Routing Protocol for Event Driven, Mission-
critical Communication Over MANET: Q-CSRPM", International Journal of Computer Network and
Information Security(IJCNIS), Vol.10, No.11, pp.18-30, 2018.DOI: 10.5815/ijcnis.2018.11.03.
AUTHORS
Shashi Raj K. is a research scholar in the department of Electronics and
Communication Engineering at Dayananda Sagar College of Engineering,
Bengaluru. He has received his B.E degree in Electronics and Communication
Engineering and M.Tech degree in VLSI Design and Embedded Systems from
VTU, Belgaum. He has eleven international, one national journal publications and
three international conference publications to his credit. His research area and area
of specialization includes Wireless Networks, VLSI and Embedded systems. He is
a life member of the Indian Society for Technical Education.

23
Dr. Siddesh G. K. is a Professor and Head of the department of Electronics and
Communication Engineering at JSS Academy of Technical Education,
Bengaluru. He obtained his B chelors and Masters Degree in Electronics and
Communication Engineering from Bangalore University and Manipal Academy
of Higher Education, Karnataka respectively. He also obtained his doctrol degree
from Visvesvaraya Technological University Belgaum, Karnataka, India. He has
20 international journal publications and 5 international conference publication
to his credit. His research area and area of specialization includes Wireless
communication, Computer Networks, Image and Data compression and Processing.

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