Selective paging receiver with message display

• US 4,818,987 A
• Filed: 12/17/1986
• Issued: 04/04/1989
• Est. Priority Date: 12/18/1985
• Status: Expired due to Term

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Ide, Motoki, Oyagi, Takashi
• Primary Examiner(s): Caldwell, Sr., John W.
• Assistant Examiner(s): Holloway, III, Edwin C.
• Application Number:
  US06/942,603
• Time in Patent Office: 839 Days
• Field of Search: 340/825.44, 340/825.48, 340/825.47, 340/311.1, 340/825.52, 455/343, 455/31, 455/38, 379/56, 379/57
• US Class Current: 340/7.46
• CPC Class Codes: H04W 88/023 with message or information receiving capability
• CPC Class Codes: H04W 88/026 using digital address codes
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A selective paging receiver with message display has a receiver section, a number setting circuit, a paging number detector, and a display panel. The receiver section receives paging signals sent to the paging receiver, and recovers a paging number data signal and a message data signal from the paging signals. The message data signal includes both individual message data for the paging receiver, and common message data for the paging receiver in common with a preselected group of similar receivers. A number setting circuit assigns both a preselected individual paging number and a preselected common paging number to the receiver. The paging number detector searches for the individual paging number in a particular group time frame of the paging number signal. This time frame corresponds to a paging receiver group to which the paging receiver belongs. The paging number detector conducts a parallel search for the common paging number without regard for the particular group time frame. Upon detection of the individual paging number, the paging number detector outputs an individual detection signal. Upon detection of the common paging number, the paging number detector outputs a common detection signal. The display responds to the individual detection signal by displaying the contents of the individual message data and responds to the common detection signal by displaying the contents of the common message data.

Claims

1. A selective paging receiver with message display, comprising:

a receiver section for receiving paging signals sent to the paging receiver and for recovering a paging number data signal and a message data signal from them, the message data signal including individual message data for said paging receiver and common message data for said paging receiver in common with a preselected group of similar receivers, said group of receivers being identified by a group time frame;

number setting means for assigning to the receiver both a preselected individual paging number which includes designation of a preselected paging receiver group, and a preselected common paging number;

paging number detector means for simultaneously comparing both said individual paging number with the recovered paging number data signal in a particular group time frame corresponding to the designated group of said paging receiver, and said common paging number with the recovered paging number data signal in a time interval not limited to said particular group time frame, and for outputting an individual match signal in response to a detection of said individual paging number and for outputting a common detection signal in response to a match of said common paging number; and

display means responsive to the individual detection signal for displaying the contents of the individual message data and responsive to the common detection signal for displaying the contents of the common message data.

2. A paging receiver for use in a system which transmits signals to both individual paging receivers and groups of said paging receivers, each of said paging receivers being identified by an individually assigned number which contains both individual and group identification, said signals including individual message data associated with numerical designations for identifying individual paging receivers and group message data associated with a common message number for a group of paging receivers, said signals being sent to said paging receivers in cyclically recurring time frames which are dedicated to identify and designate each of the groups, each of said paging receivers being within an associated group, each of said paging receivers comprising means at each of said paging receivers for receiving said signals, detector means for searching through said received signals for the number which identifies a time frame of a group containing the searching paging receiver and for simultaneously searching for both the number which is individual to the searching paging receiver during the identified time frame containing said searching receiver and for a group time frame containing a common message number for the paging receiver without regard to the time frame of the group containing the paging receiver, and means responsive to a detection of a number identifying either the paging receiver or the common message number for displaying the message associated with the detected numerical designation.

3. The paging receiver of claim 2 wherein said numerical designations for identifying paging receivers include at least one bit of lesser significance for identifying the group, and said detector means comprises means for storing the numerical designation identifying the individual receiver in a memory, means for comparing received signals with the stored designation, means for counting data words in said signal as it is received, and means for responsive to said word count for identifying the group of paging receivers to which said individual message data is directed.

4. The paging receiver of claim 3 and means associated with said detector means for reading three least significant bits in said numerical designation and responsive thereto identifying the group time frame to which the paging receiver belongs, and means responsive to the read out of said least significant bits for identifying the individual paging receiver in the group which is being signaled.

5. The paging receiver of claim 4 and means responsive to said identification of said group for searching for a numerical match within said time frame dedicated to that identified group.

6. The paging receiver of claim 5 wherein said frames are identified by frame sync signals, and means responsive to a succeeding frame sync signal for canceling said search for a numerical match.

7. The paging receiver of claim 5 wherein said signals include a sync signal and a preamble signal, there being at least two modes for energizing said paging receiver, and means for detecting both a sync signal and said preamble, and means responsive to said detection of said preamble signal for switching an energization mode for said receiver and going into a search for said sync signal mode.

8. The paging receiver of claim 7 and means responsive to a failure to detect two successive frame sync signals for canceling the switched energization mode.

9. A paging receiver comprising means for receiving and decoding message signals associated with multibit numerical signals for individually identifying said paging receiver, said multibit numerical signals being sent in cyclically recurring time frames, each of said signals including at least one bit for identifying a particular time frame which is dedicated to a group-call group of said paging receivers to which said paging receiver belongs, first means responsive to the receipt of said signals in each of said cyclically recurring time frames for searching for the time frame dedicated to the group to which said paging receiver belongs, means responsive to a detection of said dedicated time frame for searching for the numerical signal which individually identifies said paging receiver, second means responsive to the receipt of said signals for searching through all of said time frames for a different numerical signal indicating the presence of a common message number, said first and second means operating simultaneously during at least part of said searching, and means responsive to a detection of said dedicated time frame and said individual numerical signal for displaying a message directed to an individual paging receiver and responsive to said different signal for displaying a common message.

10. The paging receiver of claim 9 and means for selectively energizing said paging receiver in either a low level battery saving mode or a high level operating mode, said cyclically recurring time frames having individually associated sync pulses, message signals having a preamble signal, and means responsive to said preamble signal and the sync pulse of said dedicated time frame for switching said paging receiver to said high level mode.

11. The paging receiver of claim 10 and means responsive to a failure to detect two successive frame sync pulses for switching said paging receiver to said low level mode.

12. A paging receiver comprising:

receiver means for receiving a paging signal including an individual paging number which is assigned to said receiver and a common paging number which is assigned at least to said receiver, said paging signal being transmitted in cyclically recurring time frames;

decoder means for simultaneously searching the received paging signal both for said individual paging number in a particular group time frame corresponding to the designated group of said paging receiver and said common paging number in a time interval not limited to said particular group time frame, and for outputting an individual detection signal in response to a detection of said individual paging number and for outputting a common detection signal in response to a detection of said common paging number; and

indicating means responsive to one of said individual and common detection signals for indicating the reception of either said individual or common paging numbers.