WO2000059187A1 - Schnurlostelefon - Google Patents
Schnurlostelefon Download PDFInfo
- Publication number
- WO2000059187A1 WO2000059187A1 PCT/DE2000/000876 DE0000876W WO0059187A1 WO 2000059187 A1 WO2000059187 A1 WO 2000059187A1 DE 0000876 W DE0000876 W DE 0000876W WO 0059187 A1 WO0059187 A1 WO 0059187A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- handset
- time
- base
- power supply
- clock
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/725—Cordless telephones
- H04M1/72502—Cordless telephones with one base station connected to a single line
-
- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/26—Setting the time according to the time information carried or implied by the radio signal the radio signal being a near-field communication signal
Definitions
- the invention relates to a cordless telephone with a clock function.
- Cordless telephones with a clock function are also known, in which the time or date and time can be shown on the display of the handset and, if appropriate, the base station. This is a useful additional function, especially when the handset is used outdoors, for example in the garden or in the children's playground.
- the handset does not have to have its own time base, but the base station can display the time generated here directly on the handset display.
- a disadvantage of known cordless telephones with a clock function is that the clock function fails in the event of an interruption in the supply voltage, for example in the event of faults in the power supply or (on the part of the handset) complete exhaustion of the battery or a battery change.
- a separate current source button cell or corresponding battery
- these solutions also have disadvantages.
- the storage capacity of a capacitor used for this purpose may not be sufficient to ensure clock function in the event of long interruptions in the power supply.
- Both the provision of a capacitor and an auxiliary power source represent an additional expenditure on components, which results in an increase in costs.
- the invention is therefore based on the object of specifying an improved cordless telephone with a clock function, in which the availability of this function is ensured with a very high degree of probability and which does not require any significant additional design and expense.
- the invention includes the basic technical teaching of realizing the clock function via the connection between the base station and the handset by appropriately using oscillator elements present in the base station and the handset as the clock generator and assigned processing capacity.
- a particularly high level of security for ensuring the watch function is created in a version in which the support is bidirectional, i.e. not just one
- Power interruption on the handset means a resynchronization of the clock function via the connection to the base station, but Even if the base station is interrupted, the clock function established there can be resynchronized via the connection to the handset.
- the query means provided for realizing the resynchronization function are preferably designed such that they are activated automatically after the interruption of a power supply.
- a power supply for example by changing the rechargeable batteries, or is at least noticed by the user, it is also possible to provide a manual actuating element.
- the usefulness of the invention depends essentially on the fact that the interrogation or resynchronization means are implemented essentially in software on the basis of the existing hardware processing capacity and the existing transmitting and receiving devices.
- radio clock module in the base station increases the availability of the clock function even further and simplifies the execution on the part of the base station, but is of course associated with increased costs. This solution will therefore be useful if the use of the radio clock module is already being considered for reasons of the precision of the time.
- Fig. 1 shows a functional block diagram of the components of an embodiment of a cordless telephone and essential for the implementation of the invention
- Fig. 2 is a functional block diagram of an embodiment of the base station modified compared to Fig. 1.
- FIG. 1 shows, in a highly schematic detail, the functional components of a cordless telephone 1 which are essential for the explanation of the invention and which comprises a base station 1A and a mobile unit 1B (or several mobile units of the same construction).
- the base station 1A has a mains power supply 3 via a mains connection 3a, which - which is symbolized by a bold arrow pointing to the right - feeds all components of the base station.
- RAM working memory
- ROM program memory
- the base station has a radio clock receiver 7 with a downstream radio time processing stage 9, the output of which is connected to a transmitter 13 of the mobile station via a time transmitter switch 11 controlled by the controller 5.
- a base station reception stage 15 is connected to the controller 5 on the output side (among other things).
- the handset 1B has a battery power supply 17, which - which is symbolized again by a bold arrow - supplies the entire handset with energy.
- the battery power supply 17 is assigned a voltage sensor 19 with a downstream threshold discriminator 21 for detecting voltage interruptions or an inadmissible drop in the operating voltage.
- the output of the threshold discriminator 21 is connected to the input of a flip-flop 23, the output of which is connected to a time-of-day query generator 25 and which - depending on the specific design of the query generator - can be designed as a monostable flip-flop or as a bistable flip-flop.
- the query generator Gate 25 is connected on the output side to a handset transmitter stage 27.
- the handset also has a controller (handset controller) 29 with an associated working memory 29a and program memory 29b.
- the controller On the input side, the controller is connected to an input keyboard 31 on the handset, via which, for example, a time display can be called up.
- the handset 1B has an internal clock generator with a quartz base 33, which is followed in the usual way by divider and counter stages for obtaining a time display, which are summarized in the figure in a time generation stage 35.
- the output of the time generation stage 35 is connected to a display 39 of the handset via a time display switch 37 controlled by the handset controller 29.
- a handset receiving stage 41 is connected on the output side to the handset controller 29.
- the handset controller 29 in turn is connected via a time synchronization stage 43 to a control input of the time generation stage 35.
- the radio clock receiver 7 and the radio time processing stage 9 permanently provide high-precision real-time, which (which is not part of the invention) can optionally be displayed there and / or used for control purposes. If the mains power supply should fail, an automatic resynchronization of the real-time generation is carried out after the restoration in a manner known from radio clocks, so that the radio time is available again in the base station shortly after the end of the interruption.
- a real-time, although less precise, independent of the base station is obtained from the clock signals of the quartz base 33 by means of the time generation stage 35 and, with a corresponding key input by the user of the control, the handset controller 29 via the time of day.
- Display switch 37 displayed on the display 39. If the batteries are exhausted or the battery is replaced, the operating voltage provided for the battery power supply 17 falls below a permissible minimum value, which is detected by the voltage sensor 19 and the threshold discriminator 21 and leads to the generation of an activation pulse for the time-of-day query generator 25 by the flip-flop 23 as soon as it is detected Operating voltage rises again above the permissible minimum value (for example after the batteries have been charged or replaced).
- the time-of-day query generator then outputs a predetermined query sequence to the handset transmission stage 27 and at the same time activates the handset controller 29 for processing a response signal from the base station 1A that is then to be received via the handset reception stage 41.
- This response signal is generated there by the fact that the query signal transmitted by the handset transmission stage 27 via the air interface (symbolized by a jagged arrow) is received by the base station reception stage 15 in the base station controller 5 for processing on the basis of a program stored in the program memory 5b subjected and then the time switch 11 of the base station is closed.
- the time signal present at the output of the radio time processing stage 9 is then transferred to the base station transmission stage 13 and transmitted through this to the handset reception stage 41. From its output it goes to the handset controller 29 which, on the basis of a program stored in the program memory 29b, controls the time synchronization stage 43, which in turn effects an adjustment of the time generation stage 35 to the radio time transmitted by the base station.
- FIG. 2 shows an implementation of the base station modified compared to the embodiment shown in FIG. 1. Components that match in both figures are also identified by the same reference numerals and are not explained again below. The most important difference is the replacement of the radio clock receiver by an inexpensive quartz time base 7 ', which, however, cannot be self-resynchronized. Therefore, in this embodiment of the base station 1A '- in a manner similar to the handset according to FIG. 1 - a voltage discriminator 45 at the output of the power supply 3 and a time synchronization stage 47 are to be provided, which have a control input of the modified time processing stage (quartz time processing stage) 9 ' connected is.
- the output of the voltage discriminator 45 is connected to a flip-flop 49, which in a manner similar to the flip-flop 23 of the handset from FIG. 1 outputs a trigger pulse as soon as the operating voltage rises again after an inadmissible drop in the operating voltage of the mains power supply 3.
- This trigger pulse activates a base-side time-of-day query generator 51, which outputs a preprogrammed query signal sequence to the base station transmitter stage 13.
- this query is received in the receiving part of the partner station (here: the handset), processed in its controller 29 and answered with the output of time information via its transmitter 27 .
- This is received in its own receiver 15 and fed via the controller 5 to the time synchronization stage 47, which it uses to resynchronize the quartz time processing stage 9 1 .
- this function requires the provision of a connection between the output of the time generation stage 35 and the input of the handset transmission stage 27 according to FIG. 1, which via the controller 29 upon receipt of an question signal is activated via the receiving stage 41. Since the structure of the handset differs from that shown in FIG. 1 only in this aspect, the handset in FIG. 2 has not been shown again.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Electric Clocks (AREA)
- Telephone Set Structure (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00920404A EP1163782A1 (de) | 1999-03-26 | 2000-03-21 | Schnurlostelefon |
CA002368440A CA2368440A1 (en) | 1999-03-26 | 2000-03-21 | Cordless telephone |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19913885.0 | 1999-03-26 | ||
DE19913885A DE19913885C2 (de) | 1999-03-26 | 1999-03-26 | Schnurlostelefon |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000059187A1 true WO2000059187A1 (de) | 2000-10-05 |
Family
ID=7902605
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2000/000876 WO2000059187A1 (de) | 1999-03-26 | 2000-03-21 | Schnurlostelefon |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1163782A1 (de) |
CA (1) | CA2368440A1 (de) |
DE (1) | DE19913885C2 (de) |
WO (1) | WO2000059187A1 (de) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06120881A (ja) * | 1992-10-06 | 1994-04-28 | Fujitsu Ltd | コードレス電話装置のカレンダ修正方法 |
JPH08186868A (ja) * | 1994-12-27 | 1996-07-16 | Casio Comput Co Ltd | 携帯通信システム |
DE19536580A1 (de) * | 1995-09-29 | 1997-04-03 | Siemens Ag | Telekommunikationsendgerät |
EP0828205A1 (de) * | 1996-09-04 | 1998-03-11 | Nokia Mobile Phones Ltd. | Anzeige der Uhrzeit in einem Funktelefon |
EP0924581A1 (de) * | 1997-12-15 | 1999-06-23 | Koninklijke Philips Electronics N.V. | Schnurloses Telefon und Verwaltungsmethode eines Zeitgebers |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5964939A (ja) * | 1982-10-05 | 1984-04-13 | Nec Corp | 移動無線システム |
US5655218A (en) * | 1994-07-29 | 1997-08-05 | Motorola, Inc. | Radiotelephone communication unit displaying chronological information |
GB2297854B (en) * | 1995-02-07 | 1999-04-07 | Nokia Mobile Phones Ltd | Real time clock |
JPH1093685A (ja) * | 1996-09-18 | 1998-04-10 | Sanyo Electric Co Ltd | 留守番電話機能付きコードレス電話装置 |
-
1999
- 1999-03-26 DE DE19913885A patent/DE19913885C2/de not_active Expired - Fee Related
-
2000
- 2000-03-21 EP EP00920404A patent/EP1163782A1/de not_active Withdrawn
- 2000-03-21 WO PCT/DE2000/000876 patent/WO2000059187A1/de not_active Application Discontinuation
- 2000-03-21 CA CA002368440A patent/CA2368440A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06120881A (ja) * | 1992-10-06 | 1994-04-28 | Fujitsu Ltd | コードレス電話装置のカレンダ修正方法 |
JPH08186868A (ja) * | 1994-12-27 | 1996-07-16 | Casio Comput Co Ltd | 携帯通信システム |
DE19536580A1 (de) * | 1995-09-29 | 1997-04-03 | Siemens Ag | Telekommunikationsendgerät |
EP0828205A1 (de) * | 1996-09-04 | 1998-03-11 | Nokia Mobile Phones Ltd. | Anzeige der Uhrzeit in einem Funktelefon |
EP0924581A1 (de) * | 1997-12-15 | 1999-06-23 | Koninklijke Philips Electronics N.V. | Schnurloses Telefon und Verwaltungsmethode eines Zeitgebers |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 018, no. 406 (E - 1585) 28 July 1994 (1994-07-28) * |
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 11 29 November 1996 (1996-11-29) * |
Also Published As
Publication number | Publication date |
---|---|
EP1163782A1 (de) | 2001-12-19 |
DE19913885A1 (de) | 2000-10-05 |
CA2368440A1 (en) | 2000-10-05 |
DE19913885C2 (de) | 2001-02-08 |
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