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Lifetime of MANET Networks Increased Using
Cooperative DEL-CMAC Protocol by Parallel
Communication

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Abstract: Cooperative communication, which utilizes nearby terminals to relay the overhearing information to achieve the diversity
gains, has a great potential to improve the transmitting efficiency in wireless networks. To deal with the complicated medium access
interactions induced by relaying and leverage the benefits of such cooperation, an efficient Cooperative Medium Access Control
(CMAC) protocol is needed. In this paper, we propose Distributed Energy-adaptive Location-based CMAC protocol, namely DELCMAC,
for Mobile Ad-hoc networks (MANETs). The design objective of DEL-CMAC is to improve the performance of the MANETs in
terms of network lifetime and energy efficiency. By proposing parallel communication among the neighboring nodes the through put
and the network lifetime of the MANET networks can be achieved.


Introduction
A Mobile Ad-hoc NETwork (MANET) is a self-configured
network of mobile terminals connected by wireless links.
Mobile terminals such as cell phones, portable gaming
devices, PDAs (Personal Digital Assistants) and tablets all
have wireless networking capabilities. By participating in
MANETs, these terminals may reach the Internet when they
are not in the range of Wi-Fi access points or cellular base
stations, or communicate with each other when no
networking infrastructure is available. MANETs can also be
utilized in the disaster rescue and recovery described in One
primary issue with continuous participation in ANETs is the
network lifetime, because the aforementioned wireless
terminals are battery powered, and energy is a scarce
resource.
Cooperative Communication (CC) is a promising technique
for conserving the energy consumption in MANETs. The
broadcast nature of the wireless medium (the so-called
wireless broadcast advantage) is exploited in cooperative
fashion. The wireless transmission between a pair of
terminals can be received and processed at other terminals
for performance gain, rather than be considered as an
interference traditionally. CC can provide gains in terms of
the required transmitting power due to the spatial iversity
achieved via user cooperation. However, if we take into
account the extra processing and receiving energy
Consumption required for cooperation, CC is not always
energy efficient compared to direct transmission. There is a
tradeoff between the gains in transmitting power and the
losses in extra energy consumption.
2. Related Work
MANETs whose lifetime depends on their battery usage. Its
applications such as the Videogames, PDAs Defense organizations. Considering the network (MANETs)
deployed in the military regions, where the infrastructure
would be poor, if DEL-CMAC protocol is implemented then
, by parallel communication among the nodes in the network
will increase the network lifetime. Even a little save in the
battery will be of great use. Likewise if deployed on the
larger networks like MANETs, a definite increase in the
lifetime of the network can be achieved. The purpose of the
paper is to improve the network lifetime of the MANETs by
providing parallel communication among the neighboring
nodes in the network.
By achieving parallel communication among the nodes, the
throughput will increase and thereby instead of single
transfer of the packets, multiple packets can be transferred.
Different packets can be transferred simultaneously leading
to an efficient data transmission The basic premise is to
implement e protocol to provide parallel communication
among the nodes in the network. Compared with existing
mac protocol , the asynchronous gap that is generated is not
put to use, thereby there will be a normal rate of packet
transmission and since the MANETs rely on their battery
single transmission and its delay will use most of the battery
life and the lifetime of the network will be reduced. By
proposing the implementation of the DEL-CMAC protocol
the protocol makes sure that the asynchronous gap is utilized
and the packets can be sent across the neighboring nodes
and during this gap multiple packets can be transferred
parallel.
The existing cmac protocols mainly focus on the throughput
enhancement while failing to investigate the energy
efficiency or the network lifetime. While the works on the
network lifetime generally fixate on the physical layer or the
network layer. Our focus is on the MAC layer, and is
distinguished from the previous protocols. Zhu et al have
proposed a CMAC protocol for wireless adhoc networks
however; beneficial cooperation considering signaling
overhead is not addressed. H.Shan designed a busy tone based cross layer CMAC protocol to use busy tones to help
avoiding collisions in the cooperative scenario at the cost
and implementation complexity .A network coding aware
CMAC protocol has been proposed by Wang et al in which
relay node can forward the data for the source node, while
delivering its own data simultaneously, but the network
lifetime is not addressed.
C. Zhai proposed a distributed CMAC protocol to improve
the lifetime of the wireless sensor networks, but it’s based
on the assumption that every node can connect to the base
station within one hop, which is impractical for most
applications .ion (DCF) ,
A novel distributed energy adaptive location based CMAC
protocol namely, DEL_CMAC for MANETs is designed
based on the IEEE 802.11 Distributed Coordination
Function (DCF), which is widely used standard protocol for
most wireless sensor networks.
Moh et al have designed a Cmac protocol named cd-mac
which lets relay transmit simultaneously with the source
using the space time coding technique. Shan et al have
explored a concept of cooperation region, whereby
beneficial cooperative transmissions can be identified.
however energy consumption is not evaluated for both of
them.
By implementing the proposed protocol, the neighbouring
nodes parallelly communicate with them and the status of
the nodes will be globally updated across to all other nodes.
By doing this all other nodes in the the network will be
updated with the current status of the nodes and congestion
can be avoided.