| 摘要 |
PURPOSE: To allow the system to trace a change in a radio wave environment and an interference state in a short time and to detect the state of change by allowing a mobile station to measure the electric field strength and quality of an outgoing radio wave and allowing a base station to process the radio wave. CONSTITUTION: A radio base station BS makes two-way communication with a mobile station MS moving in a zone by means of an outgoing radio wave RWD and an incoming radio wave RWU. The radio wave RWD includes an outgoing control and speech channel and the radio wave RWU includes an incoming call and speech channel different from an outgoing frequency. The mobile station MS measures the reception level and speech quality of the received outgoing control channel at a desired interval and sends them to the base station BS through the incoming control channel of the incoming radio wave RWU. The base station BS collects the data for a desired period, an arithmetic processing section 17 applies statistic processing to the data to analyze the interference state of the operating channel of the zone, and when it is deteriorated from a specified state of a reference characteristic storage section 18, the operating channel frequency in the zone is revised into other frequency. Thus, management control and artificial management by a central controller are not required. |
