Matsushita Electric Industrial Co., Ltd.

Eiji Ohmori

Jun Yamada

Masaki Terashima

Kenichi Ooyama

In a microcellular system operated in the same frequency band as a cellular system, an interference-free channel is automatically searched and allocated. The microcellular system which shares the frequency band with the cellular system comprises a control unit, a base station and a multi-channel selecting receiver. The multi-channel selecting receiver monitors a use status of cellular channels of the band by repetitively scanning voice channels for a scanning time period substantially longer than the duration of any single voice communication to detect idling channels and allocates them to its own system. Whenever a communication request is issued, the base station detect a channel not used by its own system from the idling channels and allocates it for communication.

Method for allocating idle channels of a cellular mobile telephone

In a microcellular system operated in the same frequency band as a cellular system, an interference-free channel is automatically searched and allocated. The microcellular system which shares the frequency band with the cellular system comprises a control unit, a base station and a multi-channel selecting receiver. The multi-channel selecting receiver monitors a use status of cellular channels of the band to detect idling channels and allocates them to its own system. Whenever a communication request is issued, the base station detects a channel not used by its own system from the idling channels and allocates it for communication.

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Ohya, Japan

Eiji Ohmori