EP0505001A1 - Système de télé-appel adapté pour vérifier le fonctionnement des dispositives portatives de télé-appel - Google Patents

Système de télé-appel adapté pour vérifier le fonctionnement des dispositives portatives de télé-appel Download PDF

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Publication number
EP0505001A1
EP0505001A1 EP92200763A EP92200763A EP0505001A1 EP 0505001 A1 EP0505001 A1 EP 0505001A1 EP 92200763 A EP92200763 A EP 92200763A EP 92200763 A EP92200763 A EP 92200763A EP 0505001 A1 EP0505001 A1 EP 0505001A1
Authority
EP
European Patent Office
Prior art keywords
paging
paging device
rack
feature
compartment
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
Application number
EP92200763A
Other languages
German (de)
English (en)
Other versions
EP0505001B1 (fr
Inventor
Gauke Klaas Zijlstra
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ascom Tateco AB
Original Assignee
Ericsson Radio Systems BV
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Filing date
Publication date
Application filed by Ericsson Radio Systems BV filed Critical Ericsson Radio Systems BV
Publication of EP0505001A1 publication Critical patent/EP0505001A1/fr
Application granted granted Critical
Publication of EP0505001B1 publication Critical patent/EP0505001B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • G08B3/1008—Personal calling arrangements or devices, i.e. paging systems
    • G08B3/1016—Personal calling arrangements or devices, i.e. paging systems using wireless transmission
    • G08B3/1075—Paging racks

Definitions

  • the invention relates to a paging system as defined by the preamble of claim 1.
  • a paging system of the abovementioned type is described in US Patent Specification 3808538. If a paging device in the known system receives a message whose identification number is equal to the identification number stored in the paging device, an equality signal is generated and delivered to a control input of an amplifier for generating an acoustic paging signal. If the paging device has been placed in the rack, it receives a supply voltage for charging a storage battery in the paging device from the rack via a number of contacts. If the paging device has been placed in the rack, the supply voltage is also delivered to a control input of the amplifier in order to suppress the generation of the acoustic paging signal.
  • the paging device If the paging device has been placed in the rack and it generates the equality signal, this produces a presence signal which is delivered to the transmitting device via a processing circuit in the rack so that the transmitting device receives an indication of the presence of the paging device in the rack and, consequently, of the accessibility of the user of the paging device.
  • the equality signals or presence signals received from the various compartments of the rack are the same and are delivered via a number of conductors to the transmitting device.
  • Another drawback of the known system is that the presence of a paging unit in the rack can only be detected if, while it is still unaware of said presence, the transmitting device broadcasts a message intended for said paging device, which might occur any length of time after the paging device has been placed in the rack.
  • the object of the invention is to eliminate the drawbacks of the known paging system and to improve the system.
  • the satisfactory operation of the paging device can consequently be checked from the transmitting device. Because the passive feature which the second identification number of the paging device represents is insensitive to electronic interferences, defects and/or an empty accumulator or battery, the satisfactory operation of the paging device can be detected in good time and with high reliability.
  • the check message may be broadcast by the transmitting device at an intensity different from other messages, as a result of which the transmitting device can check whether the receiving sensitivity of the paging device is adequate. If desired, the transmitting device may broadcast a series of check messages at different transmission intensities for this purpose.
  • the passive feature which represents the second identification number of a paging device, may be such a simple feature that it can easily be provided on paging devices of the type described in said US Patent Specification 3808538 without the paging devices having to be modified further. As a result, the cost of implementation of the invention can be kept down.
  • the paging system may optionally be designed for storing in a memory data which indicate, for the various paging devices of the system, the presence or absence thereof in a rack.
  • FIG. 1 diagrammatically shows a paging system according to the invention.
  • the system comprises a central transmitting device 1, a number of portable paging devices 2 and a rack 3.
  • the rack 3 has a number of compartments 4 which are each suitable for placing a paging device 2 therein.
  • the rack 3 also has a processing circuit 5 which is connected to the transmitting device 1.
  • the transmitting device 1 may comprise operating means 6 and/or means for the remote reception of control signals for broadcasting a message.
  • each paging device 2 Assigned to each paging device 2 is a first individual identification number which, as explained with reference to figure 4, is stored in a memory 24 of the paging device 2.
  • the transmitting device 1 is suitable for compiling a message which contains a first individual identification number and for broadcasting the message via an aerial 7.
  • FIG. 2 shows, in perspective, a paging device 2 which bears on one side a passive feature 9 which represents a second individual identification number assigned to the paging device.
  • the passive feature 9 may be a simple feature, for example an optically, magnetically or mechanically detectable feature.
  • the first and second identification numbers of any paging device may be any symbol which can represent an identification code or identification number. Furthermore, it is not necessary that the first and second identification numbers assigned to a paging device 2 are identical.
  • FIG 3 diagrammatically shows a section of a compartment 4 into which a paging device 2 is partly inserted via an opening 10.
  • the compartment 4 has three contacts 11a, 11b, 11c.
  • the paging device 2 has three contacts 12a, 12b, 12c. Once the paging device 2 has been completely inserted in the compartment 4, the contacts 11a, 11b, 11c touch the contacts 12a, 12b, and 12c, respectively.
  • the contacts 11a, 11b are connected via two conductors of a bundle 15 to the terminals of a supply source (not separately shown) of the rack 3, to which the processing circuit 5 of the rack is also connected.
  • the contacts 12a, 12b are connected to terminals of a storage battery or storage battery supply circuit 27, shown in figure 4, of the paging device 2.
  • the compartment 4 also has a sensor 16 which is connected to the processing circuit 5 via a pair of conductors of the bundle 15.
  • the paging device 2 having the passive feature 9 is moved with respect to the sensor 16, the sensor 16 is suitable for detecting the feature 9. As a result, the sensor 16 and the processing circuit 5 are capable of detecting the second identification number represented by the feature 9.
  • the processing circuit 5 delivers an identification signal to the transmitting device 1 via a connection 13, which identification signal contains the second identification number of the feature 9.
  • the transmitting device 1 compiles a check message of which the first identification number is the first identification number of the paging device whose second identification number is embodied in the identification signal received from the rack 3. The transmitting device 1 then broadcasts the check message.
  • the paging device 2 If the paging device 2 to which said first and second identification numbers are assigned is working satisfactorily and receives the control message mentioned in the rack 3, the paging device 2 generates an equality signal which is delivered via the contacts 11c, 12c to the processing circuit 5 of the rack 3.
  • the processing circuit 5 delivers the equality signal, hereinafter also referred to as presence signal, to the transmitting device 1 which consequently obtains an indication of the satisfactory operation of the paging device 2, paged by means of the check message, in the rack 3.
  • the transmitting device 1 can also obtain an indication of the receiving sensitivity of said paging device 2. For that purpose, the transmitting device 1 may broadcast the check message a number of times at various transmission intensities.
  • the feature 9 may be an optically detectable feature.
  • the feature consists, for example, of a bar code, the bars of which cross the direction of insertion of the device 2 into the compartment 4.
  • the sensor 16 is in that case an optical sensor which may have a light-providing device, such as a light-emitting diode (LED), for illuminating a feature 9 which is being fed past, and a light-sensitive device, such as a light-sensitive diode, for detecting reflected light.
  • a light-providing device such as a light-emitting diode (LED)
  • a light-sensitive device such as a light-sensitive diode
  • the feature 9 may, as an alternative, be a magnetically detectable feature and consist, for example, of a magnetic tape strip.
  • the sensor 16 is a magnetically sensitive sensor.
  • the feature 9 may, as an alternative, be a mechanically detectable feature, for example consisting of a pattern of depressions or elevations.
  • the depressions or elevations may be detected by one or more switches which form the sensor 16 or in another way, for example with a laser scanner like that of a CD player.
  • the sensor 16 is preferably mounted close to the feed opening 10 of the compartment 4, as a result of which the feature 9 can be relatively long and is consequently able to contain a lot of information or the information can be spread over a longer distance. As a result, the feature 9 must be produced less precisely and/or the sensor 16 must be less sensitive and/or less precise. In addition, with such a location of the sensor 16, the feed-through speed will be more uniform, as a result of which the risk of incorrect detection of the feature 9 is counteracted.
  • the feature 9 is an optically or magnetically detectable feature of the abovementioned type, it is possible for the feature 9 to be mounted, for example, as an adhesive strip on paging devices of before the invention, for example of the type described in the said US Patent Specification 3808538.
  • FIG. 4 shows an electrical block diagram of a paging device 2 of a paging system according to the invention.
  • the paging device 2 comprises an aerial 19, a receiving circuit 20 which is connected to the aerial 19 and to a decoder 21, the latter being connected to a comparator 22 and a control circuit 23 which is connected to a memory 24, operating means, such as switches 25, a signal generator 26 and the storage battery or storage battery supply circuit 27 already mentioned.
  • the memory 24 is also connected to the comparator 22 and contains at least one first individual identification number assigned to the paging device 2.
  • the signal generator 26 may be an optical and/or acoustic and/or electromechanical signal generator.
  • the aerial 19 and the receiving circuit 20 of the paging device 2 are suitable for receiving and demodulating a message transmitted by the central transmitting device 1.
  • the receiving circuit 20 delivers the message to the decoder 21 which extracts the first identification number and any other data in the message.
  • the comparator 22 compares the first identification number received with the at least one identification number stored in the memory 24 and, in the event of equality, delivers an enable signal to the control circuit 23 for further processing the other data received, which may be presented by means of the signal generator 26. If the comparator 22 detects the equality mentioned, the control circuit 23 delivers an equality signal or presence signal to the contact 12c of the paging device 2.
  • the signal delivered to the contact 12c may simply be the output signal of the comparator 22, in which case the contact 12c may be connected directly to the output of the comparator 22 instead of to an output of the control circuit 23.
  • the signal delivered to the contact 12c may contain, according to the invention, the first identification number stored in the memory 24.
  • the transmitting device 1 achieves greater certainty about whether a presence signal received from the rack 3 does, or does not, originate from the paged paging device 2.
  • the contact 12c is in that case connected to the control circuit 23.
  • the transmitting device 1 and/or the processing circuit 5 of the rack 3 may optionally have a memory (not shown) for the storage therein of data which indicate for the paging devices of the system whether they have, or have not, been placed in the rack or in one of a number of racks of the system.
  • the presence of a paging device 2 may be detected in the way described above if the paging device 2 is inserted in a compartment 4 of the rack 3.
  • a paging device 2 from the rack 3 can easily be detected with the aid of the embodiment shown in figure 5 of a compartment 30 which differs from the compartment 4 shown in figure 3 in that the compartment 30 has a switch 31 which is in a first state if a portable device 2 has been placed in the compartment 30 and which is otherwise in a second state.
  • the switch 31 is connected via two conductors of the bundle 15' to the processing circuit 5, which is able to detect the change in state of the switch 31 and, in accordance therewith, can control the memory in order to alter the datum, previously assigned to the paging device 2, which indicated the presence of the paging device 2 in the compartment 30.
  • the passive feature 9 the processing circuit 5 and the sensor 16 can be such that the processing circuit 5 and the sensor 16 can detect the removal of a paging device 2 out of a compartment 4 by that they can detect the passing by of the passive feature (in opposite direction). It is sufficient then that a detection signal is generated which indicates the removal, without the detection signal containing a representation of the feature from which a second individual identification number could be derived.
  • the check message is transmitted by an other transmitter.
  • the other transmitter is for instance a transmitter arranged within the rack, whereby the processing circuit of the rack comprises in a memory a table containing first and second individual identification numbers assigned to the different paging devices, and the processing circuit passing test results to the central transmitting device 1.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)
EP19920200763 1991-03-21 1992-03-17 Système de télé-appel adapté pour vérifier le fonctionnement des dispositives portatives de télé-appel Expired - Lifetime EP0505001B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9100505A NL9100505A (nl) 1991-03-21 1991-03-21 Stelsel voor het detecteren van de aanwezigheid in een rek van een draagbare eenheid die geschikt is voor het uitzenden of ontvangen van een signaal met een toegewezen identificatienummer.
NL9100505 1991-03-21

Publications (2)

Publication Number Publication Date
EP0505001A1 true EP0505001A1 (fr) 1992-09-23
EP0505001B1 EP0505001B1 (fr) 1996-12-04

Family

ID=19859043

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920200763 Expired - Lifetime EP0505001B1 (fr) 1991-03-21 1992-03-17 Système de télé-appel adapté pour vérifier le fonctionnement des dispositives portatives de télé-appel

Country Status (3)

Country Link
EP (1) EP0505001B1 (fr)
DE (1) DE69215561T2 (fr)
NL (1) NL9100505A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2775103A1 (fr) * 1998-02-13 1999-08-20 Bernard Daragon Dispositif pour connaitre la disponibilite d'individus identifies d'un groupe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3808538A (en) * 1971-12-06 1974-04-30 Sonab Dev Ab Radio communication system
DE2738887A1 (de) * 1977-08-29 1979-03-22 Licentia Gmbh Einrichtung zur abwesenheitsanzeige fuer eine personenrufanlage
GB2212310A (en) * 1987-11-09 1989-07-19 Step By Step Consultants Limit Monitoring movable equipment and goods

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3808538A (en) * 1971-12-06 1974-04-30 Sonab Dev Ab Radio communication system
DE2738887A1 (de) * 1977-08-29 1979-03-22 Licentia Gmbh Einrichtung zur abwesenheitsanzeige fuer eine personenrufanlage
GB2212310A (en) * 1987-11-09 1989-07-19 Step By Step Consultants Limit Monitoring movable equipment and goods

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2775103A1 (fr) * 1998-02-13 1999-08-20 Bernard Daragon Dispositif pour connaitre la disponibilite d'individus identifies d'un groupe

Also Published As

Publication number Publication date
NL9100505A (nl) 1992-10-16
DE69215561T2 (de) 1997-03-27
DE69215561D1 (de) 1997-01-16
EP0505001B1 (fr) 1996-12-04

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