Z-MAC: A Hybrid MAC for Wireless Sensor Networks

Presented By:-
Subodh Kumar Gond
Roll. No. 08EC6415
M.Tech. 1st Year
Telecommunication System Engineering


Introduction

What is MAC
-Controlling access to the channel
What is Z-MAC

- A Hybrid MAC which Combine the strengths of CSMA and TDMA while offsetting their weakness.

- The main feature of Z-MAC is its adaptability to the level of contention in the network .

CSMA (Carrier Sense Multiple Access)
¢ ....etc

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sir
i am the student of M.tech.and i am working on wireless sensor network MAC protocols.
please send me the MATLAB coding for average packet latency in T-MAC and S-MAC protocols.on my mail id...([email protected]).

Anjali Varshney ....etc

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Impact of Node Mobility on Routing Protocols for Wireless Sensor Networks
G. Santhosh Kumar, M.V. Vinu Paul and K. Poulose Jacob
Abstract”
1
Wireless sensor networks monitor their
surrounding environment for the occurrence of some
anticipated phenomenon. Most of the research related to
sensor networks considers the static deployment of sensor
nodes. Mobility of sensor node can be considered as an
extra dimension of complexity, which poses interesting
and challenging problems. Node mobility is a very
important aspect in the des ....etc

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MAC Protocols for Sensor Networks



The characteristics of sensor networks

Tight constraints
Computation power
Storage
Primary functions
Sample the environment for sensory information
Propagate data back to the infrastructure
Traffic pattern
Little activity in lengthy period
Intensive traffic in short time
Highly correlated traffic
End to end flows are required to be fair

An adaptive rate control scheme

The metrics for evaluation of ....etc

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ABSTRACT
We propose a CDMA-based power controlled medium accessprotocol for mobile ad hoc networks (MANETs). Unlikepreviously proposed protocols, ours accounts for the multipleaccess interference (MAI), thereby addressing the notoriousnear-far problem that undermines the throughputperformance in MANETs. Channel-gain information obtainedfrom overheard RTS and CTS packets over an outof-band control channel is used to dynamically bound thetransmission power of mobile terminals in the vicinity ofa receiver. By properly estimating the requi ....etc

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Wireless Sensor Networks

A wireless sensor network consists of large Number Of Nodes.Large number of heterogeneous Sensor devices spread over a large field.They perform Wireless sensing and Data Networking. Group of sensors linked by wireless media to perform distributed sensing tasks
Each node has three components: sensing, processing, and communication. Networked sensors can continue to operate accurately in face of failure of individual sensors.Each sensor node operates autonomously with no central point of control in the network. E ....etc

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Abstract—The pervasive adoption of IEEE 802.11 radios in the past decade has made possible for the easy Internet access from a vehicle, notably drive-thru Internet. Originally designed for the static indoor applications, the throughput performance of IEEE 802.11 in the outdoor vehicular environment is, however, still unclear especially when a large number of fast-moving users transmitting simultaneously. In this paper, we investigate the performance of IEEE 802.11 DCF in the highly mobile vehicular networks. We first propose a simple yet accu ....etc

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Sensor Medium Access Control (S-MAC) FOR WIRLESS NETWORKS

ABSTRACT

S-MAC is a medium-access control (MAC) protocol designed for wireless sensor networks. Wireless sensor networks use battery-operated computing and sensing devices. A network of these devices will collaborate for a common application such as environmental monitoring. We expect sensor networks to be deployed in an ad hoc fashion, with individual nodes remaining largely inactive for long periods of time, but then becoming suddenly active when somet ....etc

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Abstract
The third generation(3G) wireless network is envisaged as the next generation wireless solution for meeting the demand of its users. It promises to provide wireless access to multimedia applications at rates upto 2Mbps. But the problems of intermittent disconnection, high error rate in wireless networks can cause degradation of protocols and compromise the QoS (Quality-of-Service) guaranteed to the users. So, there is a need for adaptive protocols, which, on determining the current adverse wireless network conditions, adapt t ....etc

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sir...
please send me the MATLAB code for energy consumption in S-MAC and Token BAsed MAC Protocol. on my mail id ([email protected])


Anjali Varshney ....etc

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