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Automatic Analysis of Primary and Secondary
Networks in a Shared IEEE 802.11 System
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Objectives
primary and a secondary (cognitive) network whenboth networks use the IEEE 802.11 based distributedcoordination function for medium access control.
The theoretical expressions are validated using
extensive simulations carried out in the NetworkSimulator
Our results provide RF ethical insights into theperformance and robustness of different schemes formedium access by the secondary network
that simply in RFeasing the secondary contentionwindow size is only marginally inferior to silent-periodbased methods in terms of its throughput performance
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INTRODUCTION
A recent and emerging approach to dramatically improvethe efficiency of spectral usage by a secondary network isthat of Radio frequency (RF)
the RF proposals are targeted towards frequency bands
where the primary signal does not employ any form ofspectrum sensing prior to transmission
This undesirable phenomenon is referred to as channelcapture in the literature.
We also illustrate the generality of the analytical framework
we develop by using it to derive the throughputperformance of other simpler secondary MAC techniquessuch as in RFeasing the contention window length andobserving a mandatory silent period.
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EXISTING SYSTEM:
Manually operated in cell phone tower
The IEEE 802.15.4 protocol offers great potential for
industrial wireless sensor networks, especially when
operating in beacon-enabled mode over star orcluster-tree topologies.
Disadvantages:
Only for tree topologies.
And also physical layer.
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Literature Review 1
A survey of quality of service in IEEE 802.11 networks
Outline:
This article surveys 802.11 QoS schemes, including
service differentiation in the MAC layer, admission control and
bandwidth reservation in MAC, and to meet these challenges
by providing the necessary enhancements for the required
QoS.
Author:
H. Zhu, M. Li, I. Chlamtac, and B. Prabhakaran,
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Limitation
It only analysis the Qos of 802.11 of primary
network.
It gives the survey of MAC layer only, higher
layers are avoided.
Throughput is less compare to the proposed
system.
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Literature Review 2
A Unified Model for the Performance Analysis of
IEEE 802.11e EDCA
Outline:
This paper gives a new unifiedperformance model and analysis
method to study the saturation throughput and delay performance
of EDCA, under the assumption of a finitenumber of stations and
ideal channel conditions in a single-hop WLAN.
Author:
J. He, L. Zheng, Z. Yang, and C. T. Chou
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Limitation
Performance is analyzed only for single hop
but proposed system it is multi hop
It gives only the assumption value of delays
with a numerous No. of stations.
Collision and Retransmissions are not
considered in the performance.
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PROPOSED SYSTEM:
100% POWER SAVING SYSTEM
USER DEFIND FOR SIGNAL SHARING BY
TOWER MANAGEMENT SYSTEM
FOR ALL TOWER WILL BE CONTROL BY LAN
BUS SYSTEM
USER DEFINED SIGNAL TRANSMISSION
FUNCTION
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ADVANTAGE
Power saving mechanism
CAN BUS will be controlled networks
For all tower will controlled system
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APPLICATION
1. EB system
2. Tower system
3. Home application4. All Networking system