Multiplo acesso em redes de comunicação sem fio
AUTOR(ES)
Rosanna Mara Rocha Silveira
DATA DE PUBLICAÇÃO
2003
RESUMO
This work analyses the mechanisms of multiple access in broadband wireless communication networks using ATM (Asynchronous Transfer Mode) technology. The uplink - from terminals to the base station - uses the TOMA (Time Division Multiple Access) technique with contention and reservation slots. The downlink - from the base station to the terminals - uses the TOM (Time Division Multiplexing) in a broadcasting way. The methodology of analysis is based on Monte Carlo and discrete event simulations. The mechanisms under analysis are: contention resolution algorithms; algorithms to schedule reservation requests; piggybacking; dynamic allocation algorithms for contention and reservation slots; frame length and contention slot length; and priority for real time traffic. By means of the comparative analysis of performance of the several mechanisms involved in the multiple access, a proposal, joining all the components, is evaluated for real time traffic and non-real time traffic, with Poisson and non-Poisson traffics
ASSUNTO(S)
sistemas de comunicação sem fio sistemas de comunicação sem fio - controle de acesso modo de transferencia assincrono simulação (computadores)
