WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, WIRELESS COMMUNICATION METHOD, AND COMPUTER PROGRAM

摘要

Random access operation is performed under a communication environment in which a plurality of communication modes having different transmission rate coexist with small overhead. A high-grade communication station spoofs information of a packet length and a rate in a decoding portion so that a value of (packet length)/(rate) corresponds to a duration where the communication is hoped to be stopped. The other station receiving the spoofed information receives the rest of the packet with the designated rate during the interval designated by the value of (packet length)/(rate). In this case, the packet length and the rate are not those of actually transmitted packet so that this packet is discarded.

主权项

1. An electronic device for a wireless communication system, the electronic device comprising:
a controller configured to
set rate information indicating 6 Mbps, which is lower than other rates used in a conventional station, in a rate field of a first signal portion, wherein the 6 Mbps is different from an/ actual rate at which a data unit is transmitted, the first signal portion, receivable at the conventional station, is transmitted prior to the data unit, and the first signal portion has a reserved area;set length information, calculated based on the rate information, in a length field of the first signal portion, wherein the length field has an upper limit, and the length information is recognizable for the conventional station;set actual rate information in a rate field of a second signal portion in a high throughput (HT) portion, wherein the second signal portion, receivable at a high throughput (HT) station, is transmitted prior to the data unit and follows the first signal portion; andset actual length information in a length field of the second signal portion; and a transmitter configured to
transmit a legacy signal obtained by modulating information in the first signal portion with a first binary phase-shift keying (BPSK) modulation scheme based on signal points of a first signal point location; andtransmit a high throughput (HT) signal obtained by modulating information in the second signal portion with a second BPSK modulation scheme based on signal points of a second signal point location, wherein each of the signal points of the second signal point location is phase rotated by 90 degrees relative to a signal point of the first signal point location, whereinthe transmitter is configured to transmit the HT signal following the legacy signal without providing a spoofed flag in the reserved area.