[특허]Position registration for cellular satellite communication systems

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04B-007/185 H04B-001/40 H04Q-007/20
출원번호	US-0754382 (1996-11-21)
발명자 / 주소	Dent, Paul W. Raith, Alex K.
출원인 / 주소	Ericsson Inc.
대리인 / 주소	Myers Bigel Sibley & Sajovec
인용정보	피인용 횟수 : 52 인용 특허 : 32

초록 ▼

A method for determining the position of a mobile radio telephone in a satellite communication system is disclosed. First, a mobile radio telephone scans a plurality of paging channels and measures the signal strength of the paging channels. The mobile radio telephone then selects the paging channel

A method for determining the position of a mobile radio telephone in a satellite communication system is disclosed. First, a mobile radio telephone scans a plurality of paging channels and measures the signal strength of the paging channels. The mobile radio telephone then selects the paging channel with the strongest signal strength and decodes the information broadcasted on the selected channel. The information contained in the paging channel can include frequencies or timeslots of paging channels in surrounding spot beams. The mobile station then measures the signal strength of paging channels in surrounding spot beams and quantizes the measurements to determine a coarse position of the mobile radio telephone.

대표청구항 ▼

A method for determining the position of a mobile radio telephone in a satellite communication system is disclosed. First, a mobile radio telephone scans a plurality of paging channels and measures the signal strength of the paging channels. The mobile radio telephone then selects the paging channel

A method for determining the position of a mobile radio telephone in a satellite communication system is disclosed. First, a mobile radio telephone scans a plurality of paging channels and measures the signal strength of the paging channels. The mobile radio telephone then selects the paging channel with the strongest signal strength and decodes the information broadcasted on the selected channel. The information contained in the paging channel can include frequencies or timeslots of paging channels in surrounding spot beams. The mobile station then measures the signal strength of paging channels in surrounding spot beams and quantizes the measurements to determine a coarse position of the mobile radio telephone. g said plurality of cells when said device is used. 5. The device as claimed in claim 4, wherein said plurality of cells are sequentially charged one by one. 6. The device as claimed in claim 4, wherein said switching device connects said plurality of cells in parallel when said plurality of cells are to be charged. 7. A heating device comprising: a main power source; an auxiliary power source comprising a chargeable capacitor; a heater comprising a main heating element configured to heat when supplied with power from said main power source and an auxiliary heating element configured to heat when supplied with power from said auxiliary power source; a charger for charging said capacitor of said auxiliary power source when supplied with power from said main power source; a switch for selectively causing said auxiliary power source to be charged or to feed power to said auxiliary heating element; a residual power detector for detecting power remaining in said auxiliary power source; and a controller for adjusting power to be fed from said auxiliary power source to said auxiliary heating element in accordance with an output of said residual power detector representative of the power remaining in said auxiliary power source. 8. The device as claimed in claim 7, wherein said controller shuts off power supply from said auxiliary power source to said auxiliary heating element when the power remaining in said auxiliary power source decreases to a preselected value. 9. The device as claimed in claim 7, wherein said auxiliary power source comprises a plurality of cells. 10. The device as claimed in claim 9, further comprising a switching device for serially connecting said plurality of cells when said device is used. 11. The device as claimed in claim 10, wherein said plurality of cells are sequentially charged one by one. 12. The device as claimed in claim 10, wherein said switching device connects said plurality of cells in parallel when said plurality of cells are to be charged. 13. A heating device comprising: a main power source; an auxiliary power source comprising a chargeable capacitor; a heater comprising a main heating element configured to heat when supplied with power from said main power source and an auxiliary heating element configured to heat when supplied with power from said auxiliary power source; a charger for charging said capacitor of said auxiliary power source when supplied with power from said main power source; a switch for selectively causing said auxiliary power source to be charged or to feed power to said auxiliary heating element; a temperature sensor for sensing a temperature of said heater; and a controller for controlling power to be fed from said auxiliary power source to said auxiliary heating element in accordance with a temperature of said heater. 14. The device as claimed in claim 13, wherein said auxiliary power source comprises a plurality of cells. 15. The device as claimed in claim 14, further comprising a switching device for serially connecting said plurality of cells when said device is used. 16. The device as claimed in claim 15, wherein said plurality of cells are sequentially charged one by one. 17. The device as claimed in claim 15, wherein said switching device connects said plurality of cells in parallel when said plurality of cells are to be charged. 18. A heating device comprising: a main power source; an auxiliary power source comprising a chargeable capacitor; a heater comprising a main heating element configured to heat when supplied with power from said main power source and an auxiliary heating element configured to heat when supplied with power from said auxiliary power source; a charger for charging said capacitor of said auxiliary power source when supplied with power from said main power source; a switch for selectively causing said auxiliary power source to be charged or to feed power to said auxiliary heating element; a switching device for se lectively causing said auxiliary power source to be charged or to feed power to said auxiliary heating element; and a temperature controller for adjusting the power to be fed from said auxiliary power source to said auxiliary heating element in accordance with a variation of temperature of said heater. 19. The device as claimed in claim 18, wherein said auxiliary power source comprises a plurality of cells. 20. The device as claimed in claim 19, further comprising a switching device for serially connecting said plurality of cells when said device is used. 21. The device as claimed in claim 20, wherein said plurality of cells are sequentially charged one by one. 22. The device as claimed in claim 20, wherein said switching device connects said plurality of cells in parallel when said plurality of cells are to be charged. 23. A fixing device for fixing a toner image formed on a recording medium, comprising: a heating device comprising: a main power source; an auxiliary power source comprising a chargeable capacitor; a heater comprising a main heating element configured to heat when supplied with power from said main power source and an auxiliary heating element configured heat when supplied with power from said auxiliary power source; a charger for charging said capacitor or said auxiliary power source when supplied with power from said main power source; a switch for selectively causing said auxiliary power source to be charged or to feed power to said auxiliary heating element; and a controller for adjusting the power to be fed from said auxiliary power source to said auxiliary heating element; and a heat roller accommodating said heater. 24. A fixing device for fixing a toner image formed on a recording medium, comprising: a heating device comprising: a main power source; an auxiliary power source comprising a chargeable capacitor; a heater comprising a main heating element configured to heat when supplied with power from said main power source and an auxiliary heating element configured to heat when supplied with power from said auxiliary power source; a charger for charging said capacitor of said auxiliary power source when supplied with power from said main power source; a switch for selectively causing said auxiliary power source to be charged or to feed power to said auxiliary heating element; a residual power detector for detecting power remaining in said auxiliary power source; and a controller for adjusting power to be fed from said auxiliary power source to said auxiliary heating element in accordance with an output of said residual power detector representative of the power remaining in said auxiliary power source; and a heat roller accommodating said heater. 25. A fixing device for fixing a toner image formed on a recording medium, comprising: a heating device comprising: a main power source; an auxiliary power source comprising a chargeable capacitor; a heater comprising a main heating element configured to heat when supplied with power from said main power source and an auxiliary heating element configured to heat when supplied with power from said auxiliary power source; a charger for charging said capacitor of said auxiliary power source when supplied with power from said main power source; a switch for selectively causing said auxiliary power source to be charged or to feed power to said auxiliary heating element; a temperature sensor for sensing a temperature of said heater; and a controller for controlling power to be fed from said auxiliary power source to said auxiliary heating element in accordance with a temperature of said heater; and a heat roller accommodating said heater. 26. A fixing device for fixing a toner image formed on a recording medium, comprising: a heating device comprising: a main power source; an auxiliary power source comprising a chargeable capacitor; a heater comprising a main heating element configured to heat when supplied with p

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이 특허에 인용된 특허 (32) 인용/피인용 타임라인 분석

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A	생활필수품
A62	인명구조; 소방(사다리 E06C)
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