Medium Access Control(MAC) Layer Design And Data Query Processing For Wireless Sensor Networks
Abstract
In this dissertation, there are four main aspects included: energy
reservation on MAC layer, secure improvement for DoS attacks on
MAC layer, query processing with uncertainty for sensor database
systems, and throughput maximization on MAC layer for ultra
wideband communication systems.
In energy reservation, we proposed asynchronous MAC (A-MAC)
protocol and asynchronous schedule-based MAC (ASMAC) protocol.
A-MAC and ASMAC protocols are attractive due to their
suitabilities for multihop networks and capabilities of removing
accumulative clock-drifts without any network synchronization.
Moreover, we build a traffic-strength- and network-density-based
model to adjust essential algorithm parameters adaptively.
In secure problem, we proposed a secure MAC protocol for WSNs. Our
algorithm-FSMAC firstly design multiple indicators for intrusion
detection according to the classification of popular DoS attacks
on MAC layer of WSNs, and innovatively utilizes fuzzy logic theory
to implement making decision on intrusion.
In query processing, we proposed a quality-guaranteed and
energy-efficient (QGEE) algorithm. QGEE utilizes in-network query
processing method to task WSDSs through declarative queries, and
confidence interval strategy to determine the accuracy of query
answers. Given a query, the QGEE algorithm can reduce disturbance
from measurements with extreme error and minimize energy
consumption, while providing satisfying service for various
applications.
In MAC protocol design for ultra wideband, we proposed a
throughput maximized MAC protocol (TM-MAC). In TM-MAC, we
implement concurrent multiuser access scheme. For multiuser
interference, we establish a model to adaptively adjust the data
transmission rate to generate the expected signal to interference
noise ratio (SINR) at the receiver side for reliable
communications. In subset formation, we propose a general
analytical framework that captures the unique characteristics of
shared wireless channel and throughput variance.