Cellular radio system

专利名称：Cellular radio system申请号：JP51468290申请日：19901107公开号：JPH05501036A公开日：19930225

摘要：A method to enhance the quality of cellular radio service is disclosed. Onlythose channels that have a reduced likelihood of co-channel or adjacent channelinterference are allocated. This technique, in addition, allows information to be providedto the operating company of drawbacks with the currently engineered RF environment. Inparticular, the base station will scan for RSSI readings on its channel and channelsadjacent to it. If an RSSI measurement above a predetermined threshold is detected, it isassumed that the base station is intercepting a signal from a mobile that is presentlybeing served by another voice channel on an adjacent cell. If this base station wereselected to process a call, it may interfere with the call that is already in progress on thecurrent channel or a call that is in progress on an adjacent channel. The base station willinform the controller when it detects an RSSI reading above the predefined thresholdindicating that the possibility for co-channel and adjacent interference exists. It will alsoinform the controller when the detected RSSI reading has gone back below thepredefined threshold indicating that the possibility for co-channel and adjacentinterference has ceased. If an idle voice channel reports the possibility of co-channel oradjacent interference, it will not be chosen to process a call until all other voice channelsthat are not reporting interference are in use. When the voice channel reports that thepossibility for co-channel or adjacent channel interference has ceased, it will be returned

to its normal priority level to be selected to process a call.

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