An IP-over-Ethernet-based ultrahigh-speed wireless LAN prototype operatingin the 60-GHz band

We have developed an IP-over-Ethernet-based ultra high-speed multimedia wir eless LAN prototype operating in the: 60-GHz band. It employs a media-acces s-control (MAC) protocol based on reservation-based slotted idle signal mul tiple access (RS-ISMA), which was implemented in the former prototype, for supporting various IP traffic such as real-time AV traffic and best-effort web traffic. The protocol also has a new function called NACK sensing for t he efficient retransmission of wireless multicast packets. It was demonstra ted that the prototype can provide the world's fastest radio transmission s peed of 128 Mbps for two-way communications. We have measured the throughpu t and latency of the prototype LAN for Ethernet-frame transmission in a poi nt-to-point baseband-connected environment. The measurement showed that the prototype LAN provides a maximum throughput of 30 Mbps, and that the measu red throughput agrees with the theoretically predicted throughput. It also showed that the maximum latency, which includes switching and routing laten cy in the wired part, is below 1 msec.