Title :
An adaptive control of the request access bandwidth of the DQRUMA for providing the QoS in an OFDM-based W-ATM system
Author :
Verikoukis, Ch V.
Author_Institution :
Signal Theor. & Commun. Dept., Tech. Univ. of Catalonia, Barcelona, Spain
Abstract :
This paper presents an adaptive control of the request access bandwidth of DQRUMA (distributed queuing request update multiple access) for providing QoS for multimedia traffic in a W-ATM system. Dynamic conversion of the transmission channel to multiple request access channels is applied when there is a large number of backlogged users. The protocol has been simulated in conjunction with a type-II hybrid-ARQ protocol based on punctured RS codes. The analysis was carried out for an OFDM scheme with QPSK modulation on each carrier. The hidden Markov model is used for modelling the physical layer of the system.
Keywords :
OFDM modulation; Reed-Solomon codes; adaptive control; asynchronous transfer mode; automatic repeat request; hidden Markov models; multi-access systems; multimedia communication; packet radio networks; quadrature phase shift keying; quality of service; queueing theory; telecommunication channels; telecommunication traffic; OFDM; QPSK modulation; QoS; W-ATM; adaptive control; distributed queuing request update multiple access; hidden Markov model; hybrid-ARQ protocol; multimedia traffic; punctured RS codes; request access bandwidth; transmission channel; wireless ATM; Access protocols; Adaptive control; Automatic repeat request; Bandwidth; Base stations; Broadcasting; Downlink; Permission; Timing; Traffic control;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010784
