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

Volume

5

fYear

2002

fDate

2002

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on

Print_ISBN

0-7803-7448-7

Type

conf

DOI

10.1109/ISCAS.2002.1010784

Filename

1010784