Radio lan system and radio lan system signal collision...

H - Electricity – 04 – L

Patent

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Details

H04L 12/28 (2006.01)

Patent

CA 2407542

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.

L'invention concerne un système de réseau local radio et un procédé évitant une collision de signal entre un système de réseau local radio débutant périodiquement une communication et un système de réseau local radio débutant une communication après attente d'une voie de communication libre. Lorsqu'un bloc programmateur (6) reconnaît la présence d'un intervalle sans signal entre une phase descendante et une phase montante, lors de la programmation d'une trame de communication, le bloc programmateur (6) arrange un signal d'établissement de support d'applications réseau après la phase descendante de façon à couvrir l'intervalle sans signal selon une instruction du bloc de génération (8) d'établissement de signal de support d'applications de réseau, réalisant ainsi programmation et émission. En conséquence, dans l'intervalle sans signal, aucune émission de données n'est réalisée par une station du système de réseau local radio au standard IEEE 802.11a, ce qui permet d'empêcher une collision de signal dans la période de la phase montante.

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