초록 ▼

A method and apparatus is provided for the overlaid operation of two or more wireless communication systems where one of the two systems is a small-scale or indoor system and the other is a large-scale or outdoor system. The indoor system monitors the operation of the outdoor system and detects whic

A method and apparatus is provided for the overlaid operation of two or more wireless communication systems where one of the two systems is a small-scale or indoor system and the other is a large-scale or outdoor system. The indoor system monitors the operation of the outdoor system and detects which part of the available radio resources are temporarily not in use or interference-free in the outdoor system. The indoor system dynamically selects an unused outdoor channel for indoor operation. The indoor radio traffic is divided into TDD time slots with the slots being used for monitoring the existing radio communication on other outdoor channels so that fast changes according to changing traffic and interference conditions are possible. Synchronization, timing and phase control may be added to assist in the maintenance of an error-free communication network.

대표청구항 ▼

[ What is claimed is:] [1.] An indoor CDMA communication system operable within the coverage area of an outdoor communication system, the outdoor communication system using an uplink frequency band for uplinking signals and a downlink frequency band for downlinking signals, the indoor CDMA communica

[ What is claimed is:] [1.] An indoor CDMA communication system operable within the coverage area of an outdoor communication system, the outdoor communication system using an uplink frequency band for uplinking signals and a downlink frequency band for downlinking signals, the indoor CDMA communication system comprising:at least one mobile station transceiver;an indoor base station transceiver operating transparently within the coverage area of the outdoor communication system, the indoor base station transceiver comprising:monitoring means for periodically monitoring the uplink frequency band and the downlink frequency band;means for determining a plurality of candidate frequencies on one of either the uplink frequency band or the downlink frequency band based upon a pre-determined acceptable interference level;means for selecting one candidate frequency from said plurality of candidate frequencies for use in bi-directional communication between said indoor base station transceiver and said at least one mobile station transceiver.