GB2274750A - Method and circuit for selecting tuning of a radio receiver - Google Patents
Method and circuit for selecting tuning of a radio receiverInfo
- Publication number
- GB2274750A GB2274750A GB9326218A GB9326218A GB2274750A GB 2274750 A GB2274750 A GB 2274750A GB 9326218 A GB9326218 A GB 9326218A GB 9326218 A GB9326218 A GB 9326218A GB 2274750 A GB2274750 A GB 2274750A
- Authority
- GB
- United Kingdom
- Prior art keywords
- radio receiver
- control channels
- communication link
- circuit
- power levels
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title abstract 2
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
- H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
- H03J1/0091—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor provided with means for scanning over a band of frequencies
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/26—Circuits for superheterodyne receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mobile Radio Communication Systems (AREA)
- Transmitters (AREA)
- Transceivers (AREA)
- Circuits Of Receivers In General (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
A circuit and method for selecting tuning of a radio receiver to a frequency channel of a set of frequency channels. The radio receiver scans selected or control channels and measures the power levels of signals generated upon control channels. Only when the measured power levels (684) of the signals generated upon the respective ones of the control channels are in excess of a certain power level is a communication link attempted to he effectuated with a transmitter of such data signals (696). When a communication link cannot be effectuated, the radio receiver powers down (708) for a predetermined time period, then powers on again (710), and the power levels of signals transmitted upon the control channels are again measured (710). Effectuation of a communication link with a transmitter which transmits a signal upon one of the control channels is attempted if the measured power level on such control channel increases beyond a certain amount. <IMAGE>
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US88080892A | 1992-05-08 | 1992-05-08 | |
PCT/US1993/003692 WO1993023963A1 (en) | 1992-05-08 | 1993-04-19 | Method and circuit for selecting tuning of a radio receiver |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9326218D0 GB9326218D0 (en) | 1994-04-20 |
GB2274750A true GB2274750A (en) | 1994-08-03 |
GB2274750B GB2274750B (en) | 1996-06-12 |
Family
ID=25377146
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9326218A Expired - Lifetime GB2274750B (en) | 1992-05-08 | 1993-04-19 | Method and circuit for selecting tuning of a radio receiver |
Country Status (11)
Country | Link |
---|---|
JP (1) | JP3196211B2 (en) |
CN (1) | CN1035588C (en) |
CA (1) | CA2112809A1 (en) |
DE (2) | DE4392213T1 (en) |
FR (1) | FR2691027B1 (en) |
GB (1) | GB2274750B (en) |
HU (1) | HUT69370A (en) |
IT (1) | IT1261466B (en) |
RU (1) | RU2123771C1 (en) |
SE (1) | SE9400018L (en) |
WO (1) | WO1993023963A1 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07508392A (en) * | 1993-04-21 | 1995-09-14 | モトローラ・インコーポレーテッド | Method and circuit for radio receiver retuning |
FR2726139A1 (en) * | 1994-10-19 | 1996-04-26 | Philips Electronics Nv | RADIO RECEIVER WITH AUTOMATIC STATION SEARCH |
EP0714217B1 (en) * | 1994-11-22 | 2005-07-27 | Ntt Mobile Communications Network Inc. | Method for searching a control channel in a mobile station |
US5940746A (en) * | 1995-12-29 | 1999-08-17 | Motorola, Inc. | Channel scanning apparatus and method |
JP3271504B2 (en) * | 1996-02-02 | 2002-04-02 | 三菱電機株式会社 | Frequency estimation circuit and AFC circuit using the same |
GB2320991A (en) * | 1996-12-20 | 1998-07-08 | Dsc Telecom Lp | Channel selection control in a cellular radio communications system |
EP0983701A2 (en) * | 1997-04-14 | 2000-03-08 | Nortel Networks Limited | Method and system for avoiding communication failure in cdma systems |
US6233247B1 (en) | 1998-03-12 | 2001-05-15 | Nortel Networks Limited | Method and system for avoiding communication failure in CDMA systems |
US6396867B1 (en) | 1997-04-25 | 2002-05-28 | Qualcomm Incorporated | Method and apparatus for forward link power control |
GB2332823A (en) * | 1997-12-29 | 1999-06-30 | Samsung Electronics Co Ltd | Sequential selection of control channels for call attempt |
GB9925234D0 (en) * | 1999-10-25 | 1999-12-22 | Simoco Int Ltd | Mobile radio communications systems |
KR100374568B1 (en) * | 2001-01-17 | 2003-03-03 | 삼성전자주식회사 | Power off control method for mobile station |
EP1482747B1 (en) * | 2003-05-28 | 2006-10-11 | Telefonaktiebolaget LM Ericsson (publ) | Cell search scheduling in a wireless cellular communication network |
JP4551814B2 (en) * | 2005-05-16 | 2010-09-29 | Okiセミコンダクタ株式会社 | Wireless communication device |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4783780A (en) * | 1985-07-09 | 1988-11-08 | U.S. Philips Corp. | Method and apparatus for selecting a free channel in a mobile radio system |
US4903320A (en) * | 1987-03-20 | 1990-02-20 | Fujitsu Limited | Apparatus for selecting control channel in mobile communication system |
US4905301A (en) * | 1988-07-28 | 1990-02-27 | Motorola, Inc. | Selective system scan for multizone radiotelephone subscriber units |
US5119502A (en) * | 1990-08-30 | 1992-06-02 | Telefonaktiebolaget L M Ericsson | Periodic system ordered rescan in a cellular communication system |
US5203012A (en) * | 1992-02-10 | 1993-04-13 | Motorola, Inc. | Method and apparatus for optimum channel assignment |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2087369A5 (en) * | 1970-05-15 | 1971-12-31 | Cit Alcatel | |
DE2402562C3 (en) * | 1974-01-19 | 1978-07-13 | Te Ka De Felten & Guilleaume Fernmeldeanlagen Gmbh, 8500 Nuernberg | Method for the automatic search of modulated radio channels |
GB2057267B (en) * | 1979-08-29 | 1983-05-18 | Allcock J A | Sensory isolation tank |
CH671124A5 (en) * | 1986-04-30 | 1989-07-31 | Zellweger Uster Ag | |
FI83715C (en) * | 1989-09-25 | 1991-08-12 | Nokia Mobile Phones Ltd | LOGIKSTYRD INTRIMNING OCH KOMPENSATION AV SIGNALNIVAOER OCH DEVIATIONER I EN RADIOTELEFON. |
FI83717C (en) * | 1989-09-25 | 1991-08-12 | Nokia Mobile Phones Ltd | Procedure for tuning and compensating power levels in a radiophone |
JP2867538B2 (en) * | 1990-01-30 | 1999-03-08 | 日本電気株式会社 | Channel selection method |
JP2927055B2 (en) * | 1991-07-12 | 1999-07-28 | 日本電気株式会社 | Control channel acquisition method and circuit |
-
1993
- 1993-04-19 JP JP52023493A patent/JP3196211B2/en not_active Expired - Lifetime
- 1993-04-19 CA CA002112809A patent/CA2112809A1/en not_active Abandoned
- 1993-04-19 WO PCT/US1993/003692 patent/WO1993023963A1/en active Application Filing
- 1993-04-19 RU RU94014617A patent/RU2123771C1/en active
- 1993-04-19 HU HU9400043A patent/HUT69370A/en unknown
- 1993-04-19 DE DE4392213T patent/DE4392213T1/en active Pending
- 1993-04-19 DE DE4392213A patent/DE4392213C2/en not_active Expired - Fee Related
- 1993-04-19 GB GB9326218A patent/GB2274750B/en not_active Expired - Lifetime
- 1993-05-03 IT ITRM930277A patent/IT1261466B/en active IP Right Grant
- 1993-05-07 FR FR9305496A patent/FR2691027B1/en not_active Expired - Lifetime
- 1993-05-07 CN CN93105681A patent/CN1035588C/en not_active Expired - Lifetime
-
1994
- 1994-01-04 SE SE9400018A patent/SE9400018L/en not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4783780A (en) * | 1985-07-09 | 1988-11-08 | U.S. Philips Corp. | Method and apparatus for selecting a free channel in a mobile radio system |
US4903320A (en) * | 1987-03-20 | 1990-02-20 | Fujitsu Limited | Apparatus for selecting control channel in mobile communication system |
US4905301A (en) * | 1988-07-28 | 1990-02-27 | Motorola, Inc. | Selective system scan for multizone radiotelephone subscriber units |
US5119502A (en) * | 1990-08-30 | 1992-06-02 | Telefonaktiebolaget L M Ericsson | Periodic system ordered rescan in a cellular communication system |
US5203012A (en) * | 1992-02-10 | 1993-04-13 | Motorola, Inc. | Method and apparatus for optimum channel assignment |
Also Published As
Publication number | Publication date |
---|---|
IT1261466B (en) | 1996-05-23 |
HUT69370A (en) | 1995-09-28 |
CN1082786A (en) | 1994-02-23 |
CN1035588C (en) | 1997-08-06 |
ITRM930277A0 (en) | 1993-05-03 |
DE4392213C2 (en) | 1999-04-29 |
JP3196211B2 (en) | 2001-08-06 |
HU9400043D0 (en) | 1994-05-30 |
CA2112809A1 (en) | 1993-11-25 |
FR2691027A1 (en) | 1993-11-12 |
ITRM930277A1 (en) | 1994-11-03 |
SE9400018L (en) | 1994-03-07 |
GB9326218D0 (en) | 1994-04-20 |
DE4392213T1 (en) | 1994-06-09 |
JPH06508973A (en) | 1994-10-06 |
SE9400018D0 (en) | 1994-01-04 |
FR2691027B1 (en) | 1995-08-11 |
GB2274750B (en) | 1996-06-12 |
RU2123771C1 (en) | 1998-12-20 |
WO1993023963A1 (en) | 1993-11-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) |
Free format text: REGISTERED BETWEEN 20110120 AND 20110126 |
|
PE20 | Patent expired after termination of 20 years |
Expiry date: 20130418 |