Frequency sharing method, receiving station and transmitting...

Telecommunications – Radiotelephone system – Zoned or cellular telephone system

Reexamination Certificate

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Details

C370S343000, C455S436000, C455S437000, C455S446000

Reexamination Certificate

active

08036676

ABSTRACT:
In a frequency sharing radio system including a plurality of systems that share a specific frequency, upon establishment of a new system using a frequency that an existing system uses, a receiving station of the existing system receives a signal from a transmitting station of the existing system at a transmission frequency. The receiving station of the existing system transmits a beacon signal indicating a reception range thereof at the transmission frequency. A transmitting station of the new system detects a beacon signal transmitted from a receiving station of another system, and judges whether signal transmission is possible based on a result of the detection.

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Hans-Jürgen Perz, et al., “Adjustable Transmission Power for Mobile Communications with Omnidirectional and Directional Antennas in an One-And Multi-Hop Environment”, Vehicular Technology Conference, XP010037156, May 19, 1991, pp. 630-635.

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