Title :
Up-link performance of the DQRUMA MAC protocol in a realistic indoor environment for W-ATM networks
Author :
Verikoukis, Ch V. ; Olmos, J.J.
Author_Institution :
Dept. of Signal Theory & Commun., Tech. Univ. of Catalunia, Barcelona, Spain
Abstract :
This paper evaluates by simulation the performance of the distributed queuing request update multiple access (DQRUMA) MAC protocol in a realistic indoor environment. This protocol has been simulated in conjunction with a type-II hybrid-ARQ protocol based on punctured R-S codes for the LLC layer. The analysis was carried out for a multicarrier modulation scheme (OFDM) with QPSK modulation on each carrier. The hidden Markov model (HMM) is used for modelling the physical layer of the system. The performance of the protocol in terms of throughput, mean delay, CLR and p.d.f. of the delay is presented. The pseudo-Bayesian algorithm as well as harmonic back-off are applied to calculate the retransmission probability for the backlogged users
Keywords :
Bayes methods; OFDM modulation; Reed-Solomon codes; access protocols; asynchronous transfer mode; automatic repeat request; hidden Markov models; indoor radio; land mobile radio; packet radio networks; probability; quadrature phase shift keying; queueing theory; radio links; CLR; DQRUMA MAC protocol; HMM; OFDM; PDF; QPSK modulation; W-ATM networks; backlogged users; distributed queuing request update multiple access; harmonic back-off; hidden Markov model; indoor environment; mean delay; mobile transmitter; multicarrier modulation; performance evaluation; physical layer; pseudo-Bayesian algorithm; punctured R-S codes; retransmission probability; simulation; throughput; type-II hybrid-ARQ protocol; up-link performance; Access protocols; Delay; Hidden Markov models; Indoor environments; Media Access Protocol; OFDM modulation; Physical layer; Probability; Quadrature phase shift keying; Throughput;
Conference_Titel :
Vehicular Technology Conference, 2000. IEEE-VTS Fall VTC 2000. 52nd
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-6507-0
DOI :
10.1109/VETECF.2000.886107
