WO1991009504A1 - Protocole d'indication a structure multiple pour un recepteur d'appel selectif - Google Patents

Protocole d'indication a structure multiple pour un recepteur d'appel selectif Download PDF

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Publication number
WO1991009504A1
WO1991009504A1 PCT/US1990/006478 US9006478W WO9109504A1 WO 1991009504 A1 WO1991009504 A1 WO 1991009504A1 US 9006478 W US9006478 W US 9006478W WO 9109504 A1 WO9109504 A1 WO 9109504A1
Authority
WO
WIPO (PCT)
Prior art keywords
selective call
call receiver
information
output
receiver according
Prior art date
Application number
PCT/US1990/006478
Other languages
English (en)
Inventor
Joan S. Deluca
Michael J. Deluca
Original Assignee
Motorola, Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Motorola, Inc. filed Critical Motorola, Inc.
Publication of WO1991009504A1 publication Critical patent/WO1991009504A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/022—Selective call receivers
    • H04W88/023—Selective call receivers with message or information receiving capability
    • 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
    • G08B3/1025—Paging receivers with audible signalling details
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/222—Personal calling arrangements or devices, i.e. paging systems
    • G08B5/223—Personal calling arrangements or devices, i.e. paging systems using wireless transmission
    • G08B5/224—Paging receivers with visible signalling details

Definitions

  • This invention relates in general to selective call receivers and more specifically to a selective call receiver signalling format having a single address and accommodating two or more information formats including, for example, numeric, alphanumeric, graphic, and voice.
  • a message comprises an address if the message is a tone only message, or an address and information if the message is a data message.
  • the information in a data message conventionally comprised one of several information formats including numeric (transmitted by BCD), alphanumeric (transmitted by ASCII), or voice (transmitted by digital or analog).
  • a preamble of a POCSAG signal comprises a number of zero-to-one transitions for bit synchronization.
  • the first word following the preamble is a sync code word which contains a predetermined binary sequence used for frame synchronization.
  • the structure of the addresses and information may be referred to as the signalling format.
  • the receivers are divided into a plurality of groups and a twenty three bit code in the preamble selects one of the groups in addition to providing means for bit and frame synchronization.
  • a start code indicates that the preamble is finished and the information following contains selective call addresses of selective call receivers within the group and messages for those selective call receivers in a pattern of sixteen information words followed by one start code word.
  • the information following each of the addresses comprised only one information format. Each address would specify to the selective call receiver receiving that address whether its information following would be numeric, alphanumeric, or voice.
  • the selective call receiver would thereby encode the proper format as transmitted, e.g., BCD or ASCII.
  • a selective call receiver comprising a receiver for receiving a signal; the signal comprising an address identifying the selective call receiver, a first information packet having a first information format, a second information packet having a second information format, and a control character; and an output device for presenting the first information packet in a first output mode corresponding to the first information format in response to the control character, and the second information packet in a second output mode corresponding to the second information format.
  • FIGURE 1 is a block diagram of a conventional selective call receiver.
  • FIGURE 2 is a diagram of the signalling format in accordance with a first embodiment.
  • FIGURE 3 is a diagram of the signalling format in accordance with a second embodiment.
  • FIGURE 4 is a diagram of the signalling format in accordance with a third embodiment. Detailed Description of the Invention
  • a transmitter 10 sends signals to an electronic device 11 such as a selective call receiver including a pager comprises an antenna 12 for receiving the signals coupled to a receiver circuit 13 which demodulates the signals received.
  • a memory 15 is coupled to the microprocessor 14 for storing those messages containing the address of the selective call receiver 11 as determined by the microprocessor 14. The portion of the memory 15 in which the address or address are stored is generally referred to as the code plug.
  • the microprocessor 14 also controls the storing and recalling of those messages.
  • An alert device 16 provides an alert, i.e., audible, visual or tactile, to the user that a message has been received and is ready to be presented.
  • An output device 17 may be a visual display for presenting the message in a numeric mode, a graphic mode or an alphanumeric mode, for example, and/or a speaker controlled by the microprocessor 14 for presenting the message in an audible mode.
  • the controls 18 allow the user to command the microprocessor 14 to perform the selective call receiver 11 operations well known to those skilled in the art and typically include control switches such as an on/off control button, a function control, etc.
  • control switches such as an on/off control button, a function control, etc.
  • the signalling format in accordance with a first embodiment of the present invention is structured so it can coexist with present selective call protocols such as GSC (Motorola's Golay Sequential Code) or POCSAG (Great Britain's Post Office Code Standardization Advisory Group) on a single or multiple frequency - channels.
  • the signalling format comprises a preamble, a code word, an address A_, messages MIA, M_2V and M3N and control characters CCi and CC2.
  • the preamble and code word for example, in POCSAG, provides bit and frame synchronization, respectively.
  • the preamble provides both bit and frame synchronization and the code word generally is a start code for the subsequent information.
  • the address Ai identifies the desired selective call receiver or receivers in a manner well known to those skilled in the art.
  • the address A informs the selective call receiver that the following message MIA is transmitted in ASCII and will be alphanumeric.
  • the control character CCi informs the selective call receiver that the message M2V immediately following is transmitted in digital or analog and will be presented aurally (voice).
  • the control character CC 2 informs the selective call receiver that the message M3N immediately following is transmitted in BCD and will be numeric.
  • the control character CC3 informs the selective call receiver that the message M4N immediately folowing is transmitted in pixal or a data stream corrosponding to FAX 1, FAX 2, FAX 3, or FAX 4 protocols, for example, and will be presented graphically.
  • a second embodiment of the signalling format comprises an address Ai, messages MIA, M2V and M3N and control characters CCi, CC2 and CC 3 .
  • the address does not specify a format; however, the control characters CCi, CC2 and CC3 precede each of the words of messages MIA, M2V and M3N, respectively, thereby informing the selective call receiver in which the following message or messages will be received and presented.
  • the control characters CCi, CC2 and CC3 may each comprise the first three bits of the 21 bit words with the 10 bits for parity immediately following the 21 bit word.
  • control character CCi may comprise the bits "000”
  • control character CC2 may comprise the bits "001”
  • control character CC2 may comprise the bits "010". Since the control signal is transmitted with each word, this embodiment provides immunity to control signals being corrupted by noise.
  • Other information formats, i.e., graphics, may be transmitted in a similar manner.
  • a third embodiment of the signalling format comprises an address A. ⁇ , messages MIA, M2V and M3N, control characters CCi, CC 2 , CC3 and CC 4 , and message length designators LDi, LD 2 , and LD3.
  • Each of the message length designators LDi, LD2, and LD3 define the length of the respective messages MIA, M2V and M3N-
  • the control character CC4 indicates that it is the last control character and the messages follow immediately thereafter.
  • Other information formats, i.e., graphics, may be transmitted in a similar manner.
  • each of the messages MIA, M2V and M3N may alternative comprise several messages in each information format, respectively, and may be interchanged in order.
  • any number of information formats may be transmitted with a single address wherein the information is transmitted in an efficient format, i.e., a number character may be transmitted using only four bits in a BCD format, an alpha character may be transmitted using only seven bits in an ASCII format, and graphic information may be transmitted in a pixal format or one of the FAX formats. Transmitting each information type in an optimum format provides for efficient usage of a paging channel. For example, transmitting a number or an alpha character in a graphic format would require at least 35 pixel bits and transmitting numbers in an ASCII format would require seven bits.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Un récepteur d'appel sélectif (11) comprend un récepteur (13) recevant un signal, le signal comprenant une adresse (A1) identifiant le récepteur d'appel sélectif, un premier paquet d'informations (M1A) possédant une première structure d'informations (CC1), un deuxième paquet d'informations (M2V) possédant une deuxième structure d'informations (CC2) et un caractère de commande. Un dispositif de sortie (17) présente le premier paquet d'informations dans un premier mode de sortie correspondant à la première structure d'informations en réponse au caractère de commande et le deuxième paquet d'informations dans un deuxième mode de sortie correspondant à la deuxième structure d'informations en réponse à l'adresse ou à un deuxième caractère de commande.
PCT/US1990/006478 1989-12-14 1990-11-09 Protocole d'indication a structure multiple pour un recepteur d'appel selectif WO1991009504A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US45049489A 1989-12-14 1989-12-14
US450,494 1989-12-14

Publications (1)

Publication Number Publication Date
WO1991009504A1 true WO1991009504A1 (fr) 1991-06-27

Family

ID=23788316

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1990/006478 WO1991009504A1 (fr) 1989-12-14 1990-11-09 Protocole d'indication a structure multiple pour un recepteur d'appel selectif

Country Status (2)

Country Link
AU (1) AU6953491A (fr)
WO (1) WO1991009504A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0572415A1 (fr) * 1991-02-22 1993-12-08 Motorola, Inc. Protocole de signalisation multiformat pour recepteur selectif d'appels
CH683052A5 (de) * 1992-02-19 1993-12-31 Erika Koechler Verfahren zum Uebertragen langer Nachrichten, insbesondere Bilder, in einem Funkrufnetz.
US5363090A (en) * 1992-07-23 1994-11-08 Motorola, Inc. Method and apparatus for combining submessages of a message to form the complete message
WO1999030297A1 (fr) * 1997-12-05 1999-06-17 Maxon Systems Inc. (London) Ltd. Teleavertisseur

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4849750A (en) * 1987-10-20 1989-07-18 Telefind Corp. Paging receiver with dynamically programmable channel frequencies and functionality

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4849750A (en) * 1987-10-20 1989-07-18 Telefind Corp. Paging receiver with dynamically programmable channel frequencies and functionality

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0572415A1 (fr) * 1991-02-22 1993-12-08 Motorola, Inc. Protocole de signalisation multiformat pour recepteur selectif d'appels
EP0572415A4 (en) * 1991-02-22 1994-06-29 Motorola Inc Multiple format signalling protocol for a selective call receiver
CH683052A5 (de) * 1992-02-19 1993-12-31 Erika Koechler Verfahren zum Uebertragen langer Nachrichten, insbesondere Bilder, in einem Funkrufnetz.
US5363090A (en) * 1992-07-23 1994-11-08 Motorola, Inc. Method and apparatus for combining submessages of a message to form the complete message
WO1999030297A1 (fr) * 1997-12-05 1999-06-17 Maxon Systems Inc. (London) Ltd. Teleavertisseur

Also Published As

Publication number Publication date
AU6953491A (en) 1991-07-18

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