Portable telephone with moving status detection function
AssigneeNEC Corporation
InventorIsao Suzuki
Life of this patent
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Abstract
A portable telephone allowing easy and accurate estimation of its moving speed at the moment when an incoming call is received is disclosed. A moving status detector is provided which detects a moving status of the portable telephone based on measured reception signal strengths, each of which is measured on a sequentially selected one of N neighboring radio channels that are previously designated by the base station at a timing other than a communication timing of the designated radio channel in response to receipt of a call setup signal for an incoming call from the base station using the designated radio channel.
Claims16
A method for determining a moving status of a portable telephone, comprising the steps of:
- a) receiving a call setup signal for an incoming call from a base station using a designated radio channel;
- b) measuring a reception signal strength on a sequentially selected one of N radio channels that are previously designated by the base station at a timing other than a communication timing of the designated radio channel, where N is an integer greater than 1;
- and
- c) determining a moving status of the portable telephone based on measured reception signal strengths.
A portable telephone comprising:
- a transceiver for receiving and transmitting radio signals from and to a base station using a radio channel designated by the base station;
- a reception level measuring circuit for measuring a reception signal intensity on a currently selected radio channel;
- and
- a moving status detector for detecting a moving status of the portable telephone based on measured reception signal strengths, each of which is measured on a sequentially selected one of N neighboring radio channels that are previously designated by the base station at a timing other than a communication timing of the designated radio channel in response to receipt of a call setup signal for an incoming call from the base station using the designated radio channel.
Dependencies are inferred from the claim text.