Method to synchronize data and a transmitter and a receiver realizing said method

• US 7,372,930 B2
• Filed: 12/30/2004
• Issued: 05/13/2008
• Est. Priority Date: 11/08/1996
• Status: Active Grant

• Current Assignee: RPX Corporation
• Original Assignee: Alcatel Alsthom
• Inventors: Van Der Putten, Frank, Adriaensen, Karel August Catharina, Spruyt, Paul Marie Pierre
• Primary Examiner(s): Corrielus; Jean B.
• Application Number:
  US11/026,258
• Publication Number:
  US 20050169413A1
• Time in Patent Office: 1,230 Days
• Field of Search: 375/219, 375/222, 375/295, 375/316, 375/354, 375/358, 370395-396, 455 68- 70
• US Class Current: 375/358
• 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 realize synchronization 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 (SIG); sending the trigger signals (T) from the receiver (RX) to the transmitter (TX); and 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 by said receiving entity in said digital data stream, without a request from the transmitting entity, time moments when there is availability to insert said data into said digital data stream;

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

sending said at least one signal to said transmitting entity by said receiving 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.

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

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

4. The method for synchronizing the insertion of data according to claim 1, wherein said predetermined time period is a waiting period realized in said transmitting entity.

5. 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.

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

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

8. A transmitting entity for synchronizing the insertion of data into a digital data stream realized in a receiving entity, said transmitting entity comprises:

a signal receiving entity configured to receive from the receiving entity, without a request from the transmitting entity, at least one signal to trigger sending of data after a predetermined time period for insertion into the digital data stream, wherein said at least one signal is generated by the receiving entity without the request from the transmitting entity by identifying time moments when said data fits into an available place in said digital data stream; and

a data sending entity configured, after being triggered by said at least one signal, to send said data from said transmitting entity to the receiving entity in 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.

9. The transmitting entity for synchronizing the insertion of data according to claim 8, wherein said data stream is an ADSL data stream.

10. The transmitting entity for synchronizing the insertion of data according to claim 8, wherein said transmitting entity is an asynchronous transfer mode transmitting entity.

11. The transmitting entity for synchronizing the insertion of data according to claim 8, wherein said predetermined time period is substantially immediately after receipt of said at least one signal.

12. The transmitting entity for synchronizing the insertion of data according to claim 8, wherein said at least one signal is a coded sequence of bits.

13. The transmitting entity for synchronizing the insertion of data according to claim 8, wherein said at least one signal is only one signal which is needed to trigger said sending entity to send said data.

14. The transmitting entity according to claim 8, wherein said predetermined time period is a waiting period realized in said transmitting entity.

15. A receiving entity for facilitating insertion by a transmitting entity data synchronized with time moments in a digital data stream, said receiving entity comprises:

a signal generator configured to identify said time moments when it is available for data to fit into said digital data stream, without a request from the transmitting entity, and to generate at least one signal to permit said transmitting entity to send said data after a predetermined time period; and

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

16. The receiving entity for inserting data according to claim 15, wherein said data stream is an ADSL data stream.

17. The receiving entity for inserting data according to claim 15, wherein said transmitting entity is an asynchronous transfer mode transmitting entity.

18. The receiving entity for inserting data according to claim 15, wherein said predetermined time period is a waiting period realized in said transmitting entity.

19. The receiving entity for inserting data according to claim 15, wherein said predetermined time period is substantially immediately after receipt of said at least one signal.

20. The receiving entity for inserting data according to claim 15, wherein said at least one signal is a coded sequence of bits.

21. The receiving entity for inserting data according to claim 15, wherein said at least one signal is only one signal which is needed to trigger said transmitting entity to send said data.