| 摘要 |
A radio LAN system and a radio LAN system signal collision evading method capable of evading signal collision between a radio LAN system starting communication periodically and a radio LAN system starting communication after waiting for an empty communication path. When a scheduler block (6) recognizes presence of a non-signal interval between a downlink phase and an uplink phase upon scheduling a communication frame, the scheduler block (6) arranges an NAV setting signal after the downlink phase so as to cover the non-signal interval in accordance with an instruction from a NAV setting signal generation block (8), thereby performing scheduling and transmission. Thus, in the non-signal interval, no data transmission is performed by a radio LAN system station of the IEEE 802. 11a standard, thereby evading signal collision in the uplink phase period.
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