Research Article
An Adaptive MAC-PHY Approach for Medium Access Control in VBR MC-CDMA Systems
@INPROCEEDINGS{10.1109/MSAN.2005.1489950, author={Giovanni Berlanda Scorza and Claudio Sacchi and Fabrizio Granelli}, title={An Adaptive MAC-PHY Approach for Medium Access Control in VBR MC-CDMA Systems}, proceedings={1st International ICST Conference on Multimedia Services Access Networks}, publisher={IEEE}, proceedings_a={MSAN}, year={2005}, month={8}, keywords={Code division multiaccess Multicarrier modulation Medium Access Control}, doi={10.1109/MSAN.2005.1489950} }- Giovanni Berlanda Scorza
Claudio Sacchi
Fabrizio Granelli
Year: 2005
An Adaptive MAC-PHY Approach for Medium Access Control in VBR MC-CDMA Systems
MSAN
IEEE
DOI: 10.1109/MSAN.2005.1489950
Abstract
In this work1, the capability of MC-CDMA to support asynchronous multi-user variable-bit-rate (VBR) transmission over multipath channel is exploited, jointly with an efficient Medium Access Control (MAC) strategy, in order to allow a significant number of VBR users to share the same bandwidth with different quality of service profiles. An application scenario related to WLAN transmission has been considered in order to assess the proposed MAC methodology. Available radio resources (i.e. the orthogonal subchannels) are selectively attributed to transmitting users depending on their achieved performance at the MAC level, measured by an “intelligent” Access Point (AP). When quality level is not satisfactory for one or more users, the AP issues a decrease of the data rate for such users while providing them with an increased number of subcarriers, in order to guarantee a lower bitrate fostered against frequency-selective channel distortions. Performance is evaluated through extensive simulation, demonstrating good performance and high flexibility of the approach.
