METHOD FOR SPECIFYING TRANSMITTING TIMES FOR CYCLICALLY SENDING OUT DATA MESSAGES, AND SUBSCRIBER DEVICE THEREFOR

• US 20090067390A1
• Filed: 09/12/2007
• Published: 03/12/2009
• Est. Priority Date: 09/12/2007
• Status: Abandoned Application

• Current Assignee: eQ-3 Entwicklung GmbH
• Original Assignee: eQ-3 Entwicklung GmbH
• Inventors: Grass, Frank, Reemts, Lars, Thole, Heiko, Willenborg, Markus, Reiss, Keno
• Application Number:
  US11/854,079
• Publication Number:
  US 20090067390A1
• Time in Patent Office: Days
• US Class Current: 370/336
• CPC Class Codes: G06F 13/385 for adaptation of a particular data processing system to different peripheral devices

Abstract

A method for specifying transmitting times for cyclically sending out data messages (3) in a data transmission network (1) is disclosed, which has a plurality of subscriber devices (2) containing transmitting and/or receiving units networked together, comprising allocating a message counter to the individual data messages (3) of a transmitting subscriber device (2) in such a manner that the message counters for a sequence of data messages (3) differ from one another, individually specifying a transmitting time (ST_x,y+1) following a transmitting time (ST_x,y), for sending out a next data message (3) for each subscriber device transmitting the data message (3), and each subsequent transmitting time of the transmitter, in such a manner that the times between in each case two successive transmitting times (ST_x,y, ST_x,y+1) of a cycle continuously varies for each transmitting subscriber device (2), and specifying the transmitting times by means of a function for generating a pseudo random number. The pseudo random number is determined in dependence on a subscriber address permanently allocated to the transmitting subscriber device (2) and on the message counter which is allocated to the data message sent out or following.

Claims

1. Method for specifying transmitting times for cyclically sending out data messages (3) in a data transmission network (1) which has a plurality of subscriber devices (2) containing transmitting and/or receiving units networked together, comprising allocating a message counter to the individual data messages (3) of a transmitting subscriber device (2) in such a manner that the message counters of a sequence of data messages (3) differ from one another, individually specifying a transmitting time (ST_x,y+1) following a transmitting time (ST_x,y), for sending out a next data message (3) for each subscriber device transmitting the data message (3), and each subsequent transmitting time of the transmitter, in such a manner that the times between in each case two successive transmitting times (ST_x,y, ST_x,y+1) of a cycle continuously varies for each transmitting subscriber device (2), and specifying the transmitting times by means of a function for generating a pseudo random number, characterized in that the pseudo random number is determined in dependence on a subscriber address permanently allocated to the transmitting subscriber device (2) and on the message counter which is allocated to the data message sent out or following.

2. Method according to claim 1, characterized by incrementing a message counter allocated to a preceding data message (3) of a transmitting subscriber device (2) and allocating the incremented message counter to the subsequent data message (3) of the transmitting subscriber device (2).

3. Method according to claim 1, characterized by adding a minimum cycle time, specified for a transmitting cycle, to the pseudo random number.

4. Method according to claim 1, characterized by specifying a transmitting time for a repeated sending-out of a data message (3) in dependence on a pseudo random number.

5. Method according to claim 1, characterized in that a transmitting time for a subsequent data message (3) is specified on sending out a data message (3) and the transmitting time is a period between the beginnings of the transmitting cycles of two successive data messages (3) of a transmitting subscriber device.

6. Method according to claim 1, characterized in that the transmitting subscriber device (2) switches to a receiving mode for receiving data messages (3) after the transmitting subscriber device (2) has sent out a data message (3).

7. Method according to claim 1, characterized in that the subscriber device (2) receiving a data message (3) determines the next transmitting time for the transmitting subscriber device (2) for sending out a subsequent data message (3) in dependence on a subscriber address permanently allocated to the transmitting subscriber device (2) and on a message counter allocated individually to the data message (3).

8. Subscriber device (2) for transmitting data messages (3) in a data transmission network (1) at cyclically specified transmitting times by means of a transmitting unit and by means of a transmitting time control unit which is set up for allocating a message counter to the individual data messages (3) of a transmitting subscriber device (2) in such a manner that the message counters of a sequence of data messages (3) differ from one another, and for individually specifying a transmitting time (ST_x,y+1), following a transmitting time (ST_x,y) for a data message (3), for sending out a next data message (3) for transmitting subscriber device (2) in such a manner that the times between in each case two successive transmitting times (ST_x,y, ST_x,y+1) of a cycle continuously varies for the subscriber device (2), characterized in that the transmitting time control unit has a random number generator and is set up for specifying the transmitting times in functional relationship with a pseudo random number generated by the random number generator in dependence on an individual subscriber address permanently allocated to the subscriber device (2) and on the message counter allocated to the data message (3) sent out or following.

9. Subscriber device (2) according to claim 8, characterized in that the transmitting time control unit is set up for incrementing a message counter allocated to a preceding data message (3) of a transmitting subscriber device and allocating the incremented message counter to the subsequent data message (3) of the transmitting subscriber device (2).

10. Subscriber device (2) according to claim 8, characterized in that the transmitting time control unit is set up for adding a minimum cycle time, specified for a transmitting cycle, to the pseudo random number.

11. Subscriber device (2) according to claim 8, characterized in that the transmitting time control unit is set up for specifying a transmitting time for a repeated sending-out of a data message (3) in dependence on the pseudo random number.

12. Subscriber device (2) according to claim 8, characterized in that the subscriber device (2) has a receiver and is set up for switching to a receiving mode for receiving data messages (3) immediately after the subscriber device (2) has sent out a data message (3).

13. Subscriber device (2) according to claim 8, characterized in that the transmitting unit is a radio transmitting unit.