Title :
Adaptive Scheduling Algorithms for Multimedia Traffic in Wireless OFDMA Systems
Author :
Cecchi, Marco ; Fantacci, Romano ; Marabissi, Dania ; Tarchi, Daniele
Author_Institution :
Dept. of Electron. & Telecommun., Univ. of Florence, Firenze
Abstract :
This paper deals with the problem of finding an optimal subcarrier allocation strategy for uplink and downlink communications in an OFDMA metropolitan wireless system. In particular a two steps approach is considered; at the first step the scheduler establishes the amount of resources to assign to users on the basis of their quality of service (QoS) constraints, while, at the second step, channel conditions are used to allocate subcarriers to users. A simple strategy for choosing the appropriate modulation and coding scheme according to the channel conditions of the assigned subcarriers is also proposed.
Keywords :
OFDM modulation; adaptive scheduling; encoding; multimedia communication; quality of service; telecommunication traffic; wireless channels; adaptive scheduling; coding scheme; downlink communications; metropolitan wireless system; modulation scheme; multimedia traffic; optimal subcarrier allocation; quality of service; uplink communications; wireless OFDMA systems; Adaptive scheduling; Downlink; Modulation coding; Multimedia systems; OFDM; Resource management; Scheduling algorithm; Telecommunication traffic; Traffic control; Wireless communication;
Conference_Titel :
Global Telecommunications Conference, 2008. IEEE GLOBECOM 2008. IEEE
Conference_Location :
New Orleans, LO
Print_ISBN :
978-1-4244-2324-8
DOI :
10.1109/GLOCOM.2008.ECP.997