Ericsson Gmbh

Sony Ericsson Mobile Communications Ab

Peter M Mangum

Mark D Priest

Robert A Zak

Paul Henry Nichols

Steven T Dreon

Laurence A La Fratta

Clyde R Butler, Jr

Gary J Pitcher

Myra Rice

A base station is configured to facilitate its rapid deployment to provide trunked radio communication system. The base station includes a receiving section and a transmitting section functioning as a repeater operating on a single trunked duplex channel. The base station also includes another receiving section for interrogating the presence of pre-existing RF energy in a given geographic area before allowing the base station to become active. This prevents a newly introduced deployable base station from interfering with pre-existing deployable or fixed base stations.

Transportable base station for a trunked radio communication system

A vehicular repeater system communicates with a portable mobile radio using the same RF communication band and digital trunking protocol that it communicates with a base site. The repeater station may employ an operational radio within a vehicle which communicates with the base site. A separate repeater radio module is connected to the operational radio, preferably through hardwired links. The separate repeater radio module includes a transmitting section which receives messages from the base site through the operational radio, and forwards these messages through a passive RF interface to a portable radio. The separate repeater also includes a receiving section which receives messages from the portable radio, and forwards these messages through the operational radio to the base site. Additionally, the receiver section may include a padded receiving section with low power amplification and additional receiver attenuation for monitoring other nearby vehicular repeater systems for potential interference prior to allowing its own vehicular repeater to become active.

In-band vehicular repeater for trunked radio system

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Forest, VA, United States of America

Peter M Mangum