Citation
Khatun, Sabira
(2003)
Adaptive Error Control Schemes For Supporting Quality Of Service In Wireless Atm Networks.
Doctoral thesis, Universiti Putra Malaysia.
Abstract
This thesis deals with the error control problems, which is one of the major issues
for supporting quality of service (QoS) in wireless ATM (W A TM). Generally in
wireless communication, error is induced by impairment prone wireless links. As a
method of quality of service based error control, the design and performance
evaluation of a retransmission based error control scheme is proposed to overcome
wireless channel impairments for multimedia traffic support over wireless A TM
networks. The purpose of the proposed error control scheme is to provide error-free
services to the higher layers by either correcting the errors in a packet or
recovering corrupted packets by retransmission in a wireless link.
From the perspective of error control, multimedia traffic can be divided into two
types: loss-sensitive traffic and delay-sensitive traffic. To support all these traffic
over W ATM networks, we propose two approaches for error control. One
approach is to utilize the reliable AAL protocol, which are referd to as AALXl and AALX2, as the end-to-end error control, based on our knowledge-based selectivereject
automatic repeat request (KSRARQ) scheme, and adaptive header protection
with KSRARQ scheme for loss-sensitive and delay-sensitive traffic, respectively.
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