In the last few years, the wireless local loop (WLL) has been shown to be an attractive alternative to the wired technology for large bandwidth services provisioning. We introduce an IP-based WLL system supporting different services such as fast Internet access, data, voice and videoconference. The proposed system guarantees quality of service (QoS) requirements to different service classes through a MAC protocol named RQDMA (ReQuest based Dynamic Multiple Access) that employs a dynamic bandwidth-sharing algorithm providing high efficiency and fairness among users. The access technique is based on multicarrier CDMA. We also present the inter-working of RQDMA with the IETF Reservation Protocol (RSVP) and an extensive performance evaluation to assess the efficiency, fairness and delay performance of RQDMA with realistic traffic sources.
["L. Dell'Uomo", 'F. Fraccalvieri', 'U. Teloni']
RQDMA: a MAC protocol supporting QoS in an IP-based broadband wireless local loop