[특허]Cellular telephone for monitoring analog and digital control channels

Cellular telephone for monitoring analog and digital control channels 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04Q-007/32
출원번호	US-0132163 (1993-10-04)
발명자 / 주소	Dahlin Jan E. A. S. (Jarfalla SEX) Mueller Walter G. A. (Kista SEX) Ghisler Walter (Upplands Vasby SEX)
출원인 / 주소	Telefonaktiebolaget L M Ericsson (Stockholm SEX 03)
인용정보	피인용 횟수 : 80 인용 특허 : 0

초록 ▼

The present invention is directed to a cellular mobile radio telephone system in which mobile stations may select either analog or digital control channels. Analog and dual-mode mobile stations are equipped to become multi-mode mobile stations which monitor both analog and digital control channels depending on the selected mode. Downlink multi-mode mobile stations, while required to use analog control channels for call access, may nonetheless scan digital control and paging channels to receive downlink control and paging communications from the land-based system. Bi-directional multi-mode mobile stations have the same capabilities as downlink mobiles but also are equipped to transmit control information to the land station over the uplink digital control channel. If no digital control channel is available, the multi-mode mobile stations scan primary and secondary sets of analog control channels. In this way, analog and dual-mode mobile stations may benefit from the advantages of monitoring digital control channels and digital paging channels including multiple pages per channel and battery-saving capabilities.

대표청구항 ▼

A multi-mode mobile radio telephone station for interacting with a plurality of base stations where at least some of said base stations conduct control communications with said mobile station over analog control channels and at least some of said base stations conduct control communications with said mobile station over digital control channels, said mobile station comprising: a mode selection switch for switching said mobile station between an analog mode and a digital mode; means for conducting control communications with one of said base stations over an analog control channel associated with this base station when said mobile station is switched to an analog mode; means for conducting control communications with one of said base stations over a digital control channel associated with this base station when said mobile station is switched to a digital mode; means for scanning a set of digital control channels, overhead message receiving means for determining if one of said digital control channels is available; means for scanning a first set of analog control channels if none of said digital control channels is available; detecting means, connected to said first set of analog control channel scanning means, for detecting at least one indicating bit which indicates whether or not a first preferred transmission system has digital traffic channel capabilities; means for scanning a set of primary analog paging channels in response to said indicating bit indicating that said first preferred transmission system has digital traffic channel capabilities; and means for scanning a second set of analog control channels in response to said indicating bit indicating that said first preferred transmission system does not have digital traffic channel capabilities.

이 특허를 인용한 특허 (80)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Cellular telephone for monitoring analog and digital control channels 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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Cellular telephone for monitoring analog and digital control channels 원문보기

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연구과제 타임라인

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이 특허를 인용한 특허 (80)

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