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Broadband packet wireless access incorporating high-speed IP packet transmission

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3 Author(s)
S. Abeta ; Wireless Labs., NTT DoCoMo, Inc, Kanagawa, Japan ; H. Atarashi ; M. Sawahashi

This paper proposes broadband packet wireless access focusing on the data link layer incorporating the IP-based core network, employing variable spreading factor-orthogonal frequency and code division multiplexing (VSF-OFCDM) with two-dimensional spreading that prioritizes time domain spreading in the forward link and multi-carrier/DS-CDMA (MC/DS-CDMA) in the reverse link for the system beyond IMT-2000. Based on the aforementioned wireless access schemes, we present inter-cell and inter-sector slow cell selection tracking shadowing variation, which is advantageous to the router-based IP core network due to its slow hard handover feature. We propose several data link control methods: adaptive radio link parameter control in the physical layer according to the quality of service (QoS) requirement, random access channel based short and long packet transmission (note that message part of random access channel is used for reservation) in the reverse link, and a maximum carrier-to-interference power ratio (CIR) based fast packet scheduling algorithm with assuring minimum throughput for access users while still maintaining fairness of packet assignment in the forward link. Furthermore, we present the throughput performance in the forward link employing Type-II hybrid ARQ called incremental redundancy coupled with the adaptive modulation and channel coding scheme with turbo coding to show a peak throughput above 100 Mbps.

Published in:

Vehicular Technology Conference, 2002. Proceedings. VTC 2002-Fall. 2002 IEEE 56th  (Volume:2 )

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