Method to synchronise data and a transmitter and a receiver realising said method

• US 20050169413A1
• Filed: 12/30/2004
• Published: 08/04/2005
• Est. Priority Date: 11/08/1996
• Status: Active Grant

• Current Assignee: RPX Corporation
• Original Assignee: Alcatel Alsthom
• Inventors: Spruyt, Paul Marie Pierre, Van Der Putten, Frank, Adriaensen, Karel August Catharina
• Granted Patent: US 7,372,930 B2
• Time in Patent Office: Days
• US Class Current: 375/354
• CPC Class Codes: H04J 3/0623 Synchronous multiplexing systems, e.g. synchronous digital hierarchy/synchronous optical network (SDH/SONET), synchronisation with a pointer process
• CPC Class Codes: H04J 3/0632 Synchronisation of packets and cells, e.g. transmission of voice via a packet network, circuit emulation service [CES] queuing arrangements in packet switching elements H04L49/90; synchronising systems for the synchronous transmission of a pulse code modulated video signal with one or more other pulse code modulated signals H04N7/56
• CPC Class Codes: H04L 7/0083 taking measures against momentary loss of synchronisation, e.g. inhibiting the synchronisation, using idle words or using redundant clocks

Abstract

A method to realise synchronisation in a receiver (RX), of data (DAT) sent from a transmitter (TX) to the receiver (RX), with a signal (SIG) available in the receiver (RX). The method includes the following steps: in the receiver (RX) generating trigger signals (T) from the signal (S); sending the trigger signals (T) from the receiver (RX) to the transmitter (TX); upon receipt of the trigger signals (T) by the transmitter (TX) sending the data (DAT) from the transmitter (TX) to the receiver (RX).

Claims

1. A method for synchronizing the insertion of data from a transmitting entity into a digital data stream realized in a receiving entity, comprising the steps of:

identifying in said data stream time moments when there is availability to insert said data into said data stream;

generating at least one signal to indicate to said transmitting entity the time moments when said data fits into an available place in said data stream;

sending said at least one signal to said transmitting entity;

receiving said at least one signal by said transmitting entity; and

sending said data from said transmitting entity to said receiving entity after a predetermined time period, wherein said data is synchronized in said available place in said data stream.

9. The method for synchronizing the insertion of data according to claim 1, wherein said data stream is an ADSL data stream.

10. The method for synchronizing the insertion of data according to claim 1, wherein said transmitting entity is an asynchronous transfer mode transmitting entity.

11. The method for synchronizing the insertion of data according to claim 1, wherein said predetermined time period is determined by said at least one signal and said predetermined time period is a waiting period realized in said transmitting entity.

12. The method for synchronizing the insertion of data according to claim 1, wherein said predetermined time period is substantially immediately after receipt of said at least one signal.

13. The method for synchronizing the insertion of data according to claim 1, wherein said at least one signal is a coded sequence of bits.

14. The method for synchronizing the insertion of data according to claim 1, wherein said data is sent by said transmitting entity and received by said at least one signal is only one signal which is needed to trigger said sending entity to send said data.

2. (canceled)

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15. A transmitting entity for synchronizing the insertion of data into a digital data stream realized in a receiving entity, comprising:

a signal receiving entity to receive at least one signal to trigger the sending of data after a predetermined time period for insertion into the digital data stream; and

a data sending entity triggered by said signal receiving entity to send data from said transmitting entity to the digital data stream after the predetermined time period, wherein said data is synchronized for receipt in a predetermined place in said digital data stream.

16. The transmitting entity for synchronizing the insertion of data according to claim 15, wherein said data stream is an ADSL data stream.

17. The transmitting entity for synchronizing the insertion of data according to claim 15, wherein said transmitting entity is an asynchronous transfer mode transmitting entity.

18. The transmitting entity for synchronizing the insertion of data according to claim 15, wherein said predetermined time period is substantially immediately after receipt of said at least one signal.

19. The transmitting entity for synchronizing the insertion of data according to claim 15, wherein said at least one signal is a coded sequence of bits.

20. The transmitting entity for synchronizing the insertion of data according to claim 15, wherein said at least one signal is only one signal which is needed to trigger said sending entity to send said data.

21. A receiving entity for inserting from a transmitting entity data synchronized with available time moments in a digital data stream, comprising:

a signal generator to identify time moments when it is available for data to fit into said digital data stream and to generate at least one signal to permit said transmitting entity to send said data after said predetermined time period; and

a data receiving entity to receive the data sent by said transmitting entity after a predetermined time period, wherein said data is synchronized in the data stream realized in said receiving entity.

22. The receiving entity for inserting data according to claim 21, wherein said data stream is an ADSL data stream.

23. The receiving entity for inserting data according to claim 21, wherein said transmitting entity is an asynchronous transfer mode transmitting entity.

24. The receiving entity for inserting data according to claim 21, wherein said predetermined time period is determined by said at least one signal and said predetermined time period is a waiting period realized in said transmitting entity.

25. The receiving entity for inserting data according to claim 21, wherein said predetermined time period is substantially immediately after receipt of said at least one signal.

26. The receiving entity for inserting data according to claim 21, wherein said at least one signal is a coded sequence of bits.

27. The receiving entity for inserting data according to claim 21, wherein said at least one signal is only one signal which is needed to trigger said sending entity to send said data.

28. The transmitting entity for synchronizing the insertion of data according to claim 21, wherein said predetermined time period is determined by said at least one signal and said predetermined time period is a waiting period realized in said transmitting entity.