Next generation network system based on TCM ISDN technique and control method thereof

Abstract

A next generation network system based on a time compression multiplex integrated service digital network technique (TCM ISDN) and a control method thereof. The system includes a synchronous clock generator for generating a transmit timing reference (TTR) reference clock to be used in a TCM ISDN and an xDSL, using a broadband clock provided through an asynchronous transfer mode (ATM) network; and a TCM ISDN subscriber processor for temporarily storing TCM ISDN data received from a public switched telephone network (PSTN), arranging a frame of the TCM ISDN data, synchronizing the TCM ISDN data to the TTR reference clock provided from the synchronous clock generator, and transmitting the synchronized TCM ISDN data to a TCM ISDN subscriber while, synchronizing the TCM ISDN data received from a TCM ISDN terminal, to the TTR reference clock input from the synchronous clock generator, temporarily storing the synchronized TCM ISDN data, and transmitting the stored TCM ISDN data to the PSTN.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete appreciation of the invention and many of the attendant advantages thereof, will be readily apparent as the same becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings in which like reference symbols indicate the same or similar components, wherein:

FIG. 1 is a functional block diagram illustrating the construction of a next generation network system based on a TCM ISDN technique according to the present invention;

FIG. 2A is a functional block diagram illustrating the detailed construction of a reception storage unit in the next generation network system based on the TCM ISDN technique of FIG. 1;

FIG. 2B is a functional block diagram illustrating the detailed construction of a transmission storage unit in the next generation network system based on the TCM ISDN technique of FIG. 1;

FIG. 2C is an illustration of inputs and outputs of the transmission/reception storage unit of FIGS. 2A and 2B;

FIG. 3 is a flowchart illustrating a next generation network system control method based on a TCM ISDN technique according to the present invention;

FIG. 4 is a flowchart illustrating in detail the step (S1) of, in a synchronous clock generator, generating and providing a TTR reference clock and an xDSL data synchronous clock using a broadband clock in the next generation network system control method based on the TCM ISDN technique of FIG. 3;

FIG. 5 is a flowchart illustrating in detail the step (S2) of, in a TCM ISDN subscriber processor, temporarily storing ISDN data received from a PSTN, synchronizing the stored ISDN data to a TTR reference clock and an xDSL data synchronous clock, and transmitting the synchronized data to a TCM ISDN terminal in the next generation network system control method based on the TCM ISDN technique of FIG. 3; and

FIG. 6 is a flowchart illustrating in detail the step (S3) of, in a TCM ISDN subscriber processor, synchronizing ISDN data received from a TCM ISDN terminal, to a TTR reference clock and an xDSL data synchronous clock, temporarily storing the synchronized ISDN data, and transmitting the stored ISDN data to a PSTN.

Claims

1. A next generation network system based on a time compression multiplex (TCM) integrated service digital network (ISDN) technique, in which a TCM ISDN (time compression multiplex integrated service digital network) service and an x digital subscriber line (xDSL) service are integrated, the system comprising: a synchronous clock generator for generating a transmit timing reference (TTR) reference clock to be used in a time compression multiplex integrated service digital network and an xDSL, using a broadband clock provided through an asynchronous transfer mode (ATM) network; anda time compression multiplex integrated service digital network subscriber processor for temporarily storing time compression multiplex integrated service digital network data received from a public switched telephone network (PSTN), arranging a frame of the time compression multiplex integrated service digital network data, synchronizing the time compression multiplex integrated service digital network data to the TTR reference clock provided from the synchronous clock generator, and transmitting the synchronized time compression multiplex integrated service digital network data to a time compression multiplex integrated service digital network subscriber while, synchronizing the time compression multiplex integrated service digital network data received from a time compression multiplex integrated service digital network terminal, to the TTR reference clock input from the synchronous clock generator, temporarily storing the synchronized time compression multiplex integrated service digital network data, and transmitting the stored time compression multiplex integrated service digital network data to the public switched telephone network.

2. The system of claim 1, wherein the synchronous clock generator comprises: a clock processor for generating an xDSL data synchronization clock and a TTR reference clock using the broadband clock provided from the asynchronous transfer mode network; anda phase locked loop for providing a time compression multiplex integrated service digital network data clock to the time compression multiplex integrated service digital network subscriber processor, using the xDSL data synchronization clock and the TTR reference clock provided from the clock processor and a divided clock provided from an oscillator.

3. The system of claim 1, wherein the broadband clock received from the asynchronous transfer mode network is a DCS clock of 64 KHz.

4. The system of claim 2, wherein the time compression multiplex integrated service digital network data clock provided from the phase locked loop is a clock of 2.049 KHz.

5. The system of claim 1, wherein the time compression multiplex integrated service digital network subscriber processor comprises: a transmission storage unit for temporarily storing the time compression multiplex integrated service digital network data input from the public switched telephone network;a reception storage unit for temporarily storing the time compression multiplex integrated service digital network data received from the time compression multiplex integrated service digital network terminal; anda frame arrangement unit for, upon receipt of the time compression multiplex integrated service digital network data from the public switched telephone network, temporarily storing the received time compression multiplex integrated service digital network data in the transmission storage unit, synchronizing the stored time compression multiplex integrated service digital network data to the TTR reference clock provided from the synchronization clock generator, and transmitting the synchronized time compression multiplex integrated service digital network data to the time compression multiplex integrated service digital network subscriber while, upon receipt of the time compression multiplex integrated service digital network data from the time compression multiplex integrated service digital network terminal, synchronizing the received time compression multiplex integrated service digital network data to the TTR reference clock provided from the synchronization clock generator, temporarily storing the synchronized time compression multiplex integrated service digital network data, and transmitting the stored time compression multiplex integrated service digital network data to the public switched telephone network.

6. The system of claim 5, wherein the transmission storage unit comprises: an ISDN transmission data input area for storing the input data; andan ISDN transmission data output area for outputting the stored data.

7. The system of claim 6, wherein the transmission storage unit includes three storage areas set in a unit of 32 bytes.

8. The system of claim 5, wherein the reception storage unit has a capacity of 128 bytes.

9. The system of claim 8, wherein the reception storage unit comprises: an ISDN reception data input area for storing the input data; andan ISDN reception data output area for outputting the stored data.

10. The system of claim 9, wherein the reception storage unit further comprises an ISDN reception data moving area for moving the data from the ISDN reception data input area to the ISDN reception data output area.

11. The system of claim 10, wherein the reception storage unit comprises three storage areas set in a unit of 32 bytes.

12. A next generation network system control method based on a time compression multiplex (TCM) integrated service digital network (ISDN) technique, for frame synchronization in a next generation network system that can process a time compression multiplex integrated service digital network and an x digital subscriber line (xDSL), the method comprising the steps of: generating, by a synchronization clock generator, a transmit timing reference (TTR) reference clock and an xDSL data synchronization clock, using a broadband clock provided from an asynchronous transfer mode (ATM) network; andupon receipt of time compression multiplex integrated service digital network data from a public switched telephone network (PSTN), temporarily storing, by a time compression multiplex integrated service digital network subscriber processor, the received time compression multiplex integrated service digital network data, synchronizing the stored time compression multiplex integrated service digital network data to the TTR reference clock and the xDSL data synchronous clock, and transmitting the synchronized time compression multiplex integrated service digital network data to a time compression multiplex integrated service digital network subscriber.

13. The method of claim 12, wherein the step of generating, by the synchronization clock generator, the TTR reference clock and the xDSL data synchronization clock, using the broadband clock provided from the asynchronous transfer mode network, comprises the steps of: receiving, by the synchronization clock generator, the broadband clock from the asynchronous transfer mode network;generating, by the synchronization clock generator, the xDSL data synchronization clock and the TTR reference clock, using the received broadband clock; andgenerating, by the synchronization clock generator, a time compression multiplex integrated service digital network data clock using the generated xDSL data synchronization clock and TTR reference clock, and a divided clock provided from an oscillator, and providing the generated time compression multiplex integrated service digital network data clock to the time compression multiplex integrated service digital network subscriber processor.

14. The method of claim 13, wherein the time compression multiplex integrated service digital network data clock is a clock of 2.049 KHz.

15. The method of claim 12, wherein the step of, upon receipt of the time compression multiplex integrated service digital network data from the public switched telephone network, temporarily storing, by the time compression multiplex integrated service digital network subscriber processor, the received time compression multiplex integrated service digital network data, synchronizing the stored time compression multiplex integrated service digital network data to the TTR reference clock and the xDSL data synchronization clock, and transmitting the synchronized time compression multiplex integrated service digital network data to the time compression multiplex integrated service digital network subscriber, comprises the steps of: storing, by the time compression multiplex integrated service digital network subscriber processor, the time compression multiplex integrated service digital network data received from the public switched telephone network, in an ISDN transmission data input area; andsynchronizing, by the time compression multiplex integrated service digital network subscriber processor, the time compression multiplex integrated service digital network data stored in an ISDN transmission data output area, to the TTR reference clock, and transmitting the synchronized time compression multiplex integrated service digital network data to a time compression multiplex integrated service digital network terminal.

16. The method of claim 15, wherein in the step of, upon receipt of the time compression multiplex integrated service digital network data from the public switched telephone network, temporarily storing, by the time compression multiplex integrated service digital network subscriber processor, the received time compression multiplex integrated service digital network data, synchronizing the stored time compression multiplex integrated service digital network data to the TTR reference clock and the xDSL data synchronization clock, and transmitting the synchronized time compression multiplex integrated service digital network data to the time compression multiplex integrated service digital network subscriber, after the time compression multiplex integrated service digital network data is transmitted in synchronization with the TTR reference clock, the time compression multiplex integrated service digital network data stored in each area is shifted and moved to a next area.

17. The method of claim 12, further comprising the step of, upon receipt of the time compression multiplex integrated service digital network data from a time compression multiplex integrated service digital network terminal, synchronizing, by the time compression multiplex integrated service digital network subscriber processor, the received time compression multiplex integrated service digital network data to the TTR reference clock and the xDSL data synchronization clock, temporarily storing the synchronized time compression multiplex integrated service digital network data, and transmitting the stored time compression multiplex integrated service digital network data to the public switched telephone network.

18. The method of claim 17, wherein the step of, upon receipt of the time compression multiplex integrated service digital network data from the time compression multiplex integrated service digital network terminal, synchronizing, by the time compression multiplex integrated service digital network subscriber processor, the received time compression multiplex integrated service digital network data to the TTR reference clock and the xDSL data synchronization clock, temporarily storing the synchronized time compression multiplex integrated service digital network data, and transmitting the stored time compression multiplex integrated service digital network data to the public switched telephone network, comprises the steps of: synchronizing, by the time compression multiplex integrated service digital network subscriber processor, the time compression multiplex integrated service digital network data received from the time compression multiplex integrated service digital network terminal, to the TTR reference clock, and storing the synchronized time compression multiplex integrated service digital network data in an ISDN reception data input area; andtransmitting, by the time compression multiplex integrated service digital network subscriber processor, the time compression multiplex integrated service digital network data stored in an ISDN reception data output area, to the public switched telephone network.

19. The method of claim 18, wherein in the step of, upon receipt of the time compression multiplex integrated service digital network data from the time compression multiplex integrated service digital network terminal, synchronizing, by the time compression multiplex integrated service digital network subscriber processor, the received time compression multiplex integrated service digital network data to the TTR reference clock and the xDSL data synchronization clock, temporarily storing the synchronized time compression multiplex integrated service digital network data, and transmitting the stored time compression multiplex integrated service digital network data to the public switched telephone network, after transmitting the time compression multiplex integrated service digital network data stored in synchronization with the TTR reference clock, to the public switched telephone network, the time compression multiplex integrated service digital network subscriber processor shifts and moves the time compression multiplex integrated service digital network data stored in each area, to a next area.