Mobile station having indoor/outdoor mode shifting function
First Claim
1. A mobile station which communicates via wireless line with a base station forming a communication network and which receives a GPS signal from a GPS satellite, said mobile station comprising:
- comparing means which compares reception strength of said GPS signal with a threshold to detect presence or absence of the GPS signal;
determining means which determines a mode of indoor or outdoor according to the presence or the absence of the GPS signal;
altering means which alters a setup of a mobile station interface according to said mode; and
a satellite reception timer which sets a reception period of said GPS signal and sets a start of said reception period when said mode is determined,wherein said comparing means compares the reception strength of the GPS signal received at every said reception period.
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Accused Products
Abstract
In a mobile station, a period for receiving a GPS signal from a predetermined satellite based on data for satellite reception is set up by a timer, and the GPS signal whose reception level is higher than a threshold value is awaited. Until elapsed time reaches a preset time, indoor counter is incremented if the GPS signal is unable to be received or outdoor counter is incremented if the GPS signal is able to be received. When each counter reaches a specified value, each mode is determined. If the mode is different from a previous mode, a mode shift is executed and setups of user interfaces, display, speaker and others, are altered for the updated mode, indoor or outdoor.
21 Citations
12 Claims
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1. A mobile station which communicates via wireless line with a base station forming a communication network and which receives a GPS signal from a GPS satellite, said mobile station comprising:
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comparing means which compares reception strength of said GPS signal with a threshold to detect presence or absence of the GPS signal; determining means which determines a mode of indoor or outdoor according to the presence or the absence of the GPS signal; altering means which alters a setup of a mobile station interface according to said mode; and a satellite reception timer which sets a reception period of said GPS signal and sets a start of said reception period when said mode is determined, wherein said comparing means compares the reception strength of the GPS signal received at every said reception period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A setup altering method for a mobile station which communicates via wireless line with a base station forming a communication network and which receives a GPS signal from a GPS satellite, said setup altering method comprising steps of:
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comparing reception strength of said GPS signal with a threshold to detect presence or absence of the GPS signal; determining a mode of indoor or outdoor according to the presence or the absence of the GPS signal; altering a setup of a mobile station interface according to said mode; and setting a reception period of said GPS signal and a start of said reception period when said mode is determined, and counting continuous times of the presence or the absence detected at said comparing step. - View Dependent Claims (11, 12)
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Specification