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ABSTRACT
Cooperative communication is used for conserving the energy in mobile adhoc network. Cooperative communication is used for realizing spatial diversity through a virtual antenna array formed by multiple antennas of different nodes. Cooperative scheme improve the performance between sources to destination with the help of relay. In this paper we enhance CSMA/CA in cooperative MAC protocol for improving the energy efficiency and reducing the delay rate. The C-MAC protocol achieves high channel utilization during high traffic load without compromising energy efficiency. The proposed system consists of sleep and active mode.
. INTRODUCTION
A mobile ad hoc network (MANET) is a infrastructure-less network of mobile devices connected without wires. It has independent mobile nodes that can communicate with each other through radio waves. The mobile nodes within the radio range of each other can communicate directly, whereas others need the aid of intermediate nodes to route their packets.
Each device in a MANET can move free in any direction, and changes its link to
other devices frequency. MANETs has a routable networking environment on top of a Link Layer ad hoc network. MANETs circa typically communicate at radio frequencies (30 MHz - 5 GHz). Routes between nodes contain multiple hop like nodes act as routers to forward packets for each other and node mobility may cause the routes change. The main advantage is low-cost, flexibility and it is ease & Speed of deployment, decreased dependence on infrastructure. MANET has many applications in Military environments Civilian environments Emergency
operations like search-and-rescue / policing and fire fighting. To reduce packet loss ratio and improve network throughput, and reduce the energy consumption in Mobile ad hoc networks, a scheduling scheme employed based on node model and analyze the stability property of a network system.
2. RELATED WORKS
2.1 Hybrid Energy Efficient Distributed Protocol for Heterogeneous Wireless Sensor
Network
Author : Harneet Kour , Ajay K. Sharma July 2010
Hybrid Energy Efficient Distributed Protocol for Wireless Sensor Network has been used to extend the network lifetime. Hybrid energy efficient distributed protocol is clustering protocol. Here residual energy is used as primary parameter and network topology features as secondary parameter. The lifetime of sensor networks to be limited there is a chance to re-energize the sensor network by adding more nodes.Multi-level H-HEED prolongs lifetime and shows better performance than other level of HHEED and HEED protocol.
2.2 An Adaptive Energy Aware Node Scheduling Scheme In Clustering for Wireless Sensor Networks
Author : Ms.Namrata ,S. Baghele Year 2012
In this paper, author proposed a clustering method with coverage and
RELATED WORKS
energy aware TDMA scheduling scheme. The cluster formation is done by the base station according to the current residual energy, due to congestion avoidance and energy management the coverage area of cluster Member is reduced. We achieve increased number of user in particular one channel the number of user is increased.
2.3 Extending the lifetime of Wireless Sensor Networks through Adaptive Sleep
Authors : Giuseppe Anastasi, Marco Conti, Mario Di Francesco Year 2007
In this paper, author proposed an Adaptive Staggered SLEEP Protocol (ASLEEP) for efficient power management in wireless sensor networks targeted to periodic data acquisition. This protocol dynamically adjusts the sleep schedules of nodes to match the network demands, even in time-varying operating conditions. They uses the CSMA scheme for process the data, but it may be not efficient in fixed WSN network and there is no detail to data management
Energy-Efficient Topology Control In Cooperative Ad Hoc Network
Authors : Ying Zhu, Minsu Huang,
Siyuan Chen, and Yu Wang, Aug.2011
Cooperative communication (CC) provides space diversity through allowing multiple nodes cooperatively relay the signals to receiver so that combined signal at the receiver can be correctly decoded. Since CC can minimize the transmission power and elaborate the coverage range of transmission, it has been considered in topology control protocols
. 3.PROTOCOL DESCRIPTION
3.1 SYSTEM DESIGN
DESCRIPTION
• The sensor node is the node that is the central unit in the network. That is the intermediate to the sensor channel and the wireless channel.
• That is linked with the sensor signalling condition that will check the signal strength value of the sensor node and process the sensor signal.
• The sleep/awake scheduler makes the sensor node as active or sleep state.
. CONCLUSION
Here in this paper we use CSMA/CA mechanism, where the nodes can sleep and awake at same time and same interval, if it does not have any data. If any node has to send the data then sender and receiver should be in active node, remaining all nodes can go to sleep. By this we can save the energy.