Communication network with bandwidth managers for allocating bandwidth to different types of traffic

• US 5,526,350 A
• Filed: 06/21/1994
• Issued: 06/11/1996
• Est. Priority Date: 03/09/1994
• Status: Expired due to Term

• Current Assignee: British Telecommunications PLC (BT Group PLC)
• Original Assignee: British Telecommunications PLC (BT Group PLC)
• Inventors: Gittins, Christopher J., Cox, Simon A.
• Primary Examiner(s): Kizou, Hassan
• Application Number:
  US08/263,350
• Time in Patent Office: 721 Days
• Field of Search: 370/53, 370/57, 370/58.1, 370/60, 370/62, 370/60.1, 370/68.9, 370/79, 370/112, 370/118, 379/93, 379/96, 348/14, 348/15, 348/16, 358/425, 358/426, 358/434, 358/435
• US Class Current: 370/468
• CPC Class Codes: H04L 2012/5615 Network termination, e.g. NT1, NT2, PBX
• CPC Class Codes: H04L 2012/5619 Network Node Interface, e.g. tandem connections, transit switching
• CPC Class Codes: H04L 2012/5632 Bandwidth allocation
• CPC Class Codes: H04Q 11/0478 Provisions for broadband connections
• CPC Class Codes: H04Q 2213/13174 Data transmission, file transfer
• CPC Class Codes: H04Q 2213/1322 PBX
• CPC Class Codes: H04Q 2213/13332 Broadband, CATV, dynamic bandwidth allocation
• CPC Class Codes: H04Q 2213/13337 Picturephone, videotelephony
• CPC Class Codes: H04Q 2213/13384 Inter-PBX traffic, PBX networks, e.g. corporate networks
• CPC Class Codes: H04Q 2213/13523 bandwidth management, e.g. capacity management
• CPC Class Codes: H04Q 3/0016 Arrangements providing connection between exchanges
• CPC Class Codes: H04Q 3/0029 Provisions for intelligent networking
• CPC Class Codes: H04Q 3/0066 Bandwidth allocation or management

Abstract

A switched telecommunications network includes a plurality of switches for switching different types of traffic, such as audio data, including voice data, fax and modem originated data, digital computer originated data and video data. A communications link connects a user'"'"'s site to the network, and bandwidth manager are provided to multiplex traffic of different types for transmission over the link. After transmission over the link, a complementary bandwidth manager is arranged to de-multiplex the traffic for application to the respective switches. The bandwidth manager is arranged to dynamically allocate bandwidth to the different types of traffic, thereby optimizing the available bandwidth provided by the communications link.

Claims

1. A switched telecommunications network comprising:

a first switching means for switching a first type of traffic;

a second switching means for switching a second type of traffic;

a communications link connecting a user'"'"'s site to the network;

a bandwidth manager, at the user'"'"'s end of the communications link, arranged to multiplex traffic of the first and second types for transmission over the link; and

a complementary bandwidth manager, at the switching end of the link, arranged to de-multiplex the first and second traffic types for application to respective switching means,

wherein the bandwidth manager includes means to allocate bandwidth to particular types of traffic in response to customer demand.

2. A network as in claim 1, wherein the bandwidth manager includes means for guaranteeing a minimum level of bandwidth for particular traffic types.

3. A network as in claim 1, further comprising means for multiplexing video data.

4. A network as in claim 1 including means for multiplexing computer originated data.

5. A network as in claim 1 further comprising means for multiplexing voice data or audio data.

6. A switched telecommunications network comprising:

a first switching means for switching a first type of traffic;

a second switching means for switching a second type of traffic;

a communications link connecting a user'"'"'s site to the network;

a bandwidth manager, at the user'"'"'s end of the communications links, arranged to multiplex traffic of the first and second types for transmission over the link;

a complementary bandwidth manager, at the switching end of the link, arranged to de-multiplex the first and second traffic types for application to respective switching means,

a third switching means for switching a third type of traffic,

wherein the bandwidth manager is arranged to multiplex the first, second and third types of traffic, and

wherein the complementary bandwidth manager is arranged to de-multiplex the first, second and third types of traffic.

7. A switched telecommunications network comprising:

a first switching means for switching a first type of traffic;

a second switching means for switching a second type of traffic;

a communications link connecting a user'"'"'s site to the network;

a bandwidth manager, at the user'"'"'s end of the communications link, arranged to multiplex traffic of the first and second types for transmission over the link;

a complementary bandwidth manager, at the switching end of the link, arranged to de-multiplex the first and second traffic types for application to respective switching means, and

means for multiplexing voice data or audio data,

wherein the bandwidth manager includes means for identifying voice data, and for compressing the voice data to facilitate efficient transmission through the network.

8. A switched telecommunications network comprising:

a first switching means for switching a first type of traffic;

a second switching means for switching a second type of traffic;

a communications link connecting a user'"'"'s site to the network;

a bandwidth manager, at the user'"'"'s end of the communications link, arranged to multiplex traffic of the first and second types for transmission over the link;

a complementary bandwidth manager, at the switching end of the link, arranged to de-multiplex the first and second traffic types for application to respective switching means, and

means for multiplexing voice data or audio data,

wherein the bandwidth manager includes means for identifying facsimile encoded data, and for re-coding the facsimile data to facilitate efficient transmission through the network.

9. A switched telecommunications network comprising:

a first switching means for switching a first type of traffic;

a second switching means for switching a second type of traffic;

a communications link connecting a user'"'"'s site to the network;

a bandwidth manager, at the user'"'"'s end of the communications link, arranged to multiplex traffic of the first and second types for transmission over the link;

a complementary bandwidth manager, at the switching end of the link, arranged to de-multiplex the first and second traffic types for application to respective switching means, and

means for multiplexing voice data or audio data,

wherein the bandwidth manager includes means for identifying audio encoded computer originated data from a modem, and for re-coding said data to facilitate efficient transmission.

10. A method of communicating over a network, the method comprising steps of:

switching a first type of traffic via a first switching means;

switching a second type of traffic via a second switching means;

connecting a user'"'"'s site to the network via a communications link;

multiplexing traffic of the first and second types for transmission over the link at the user'"'"'s end of the link;

de-multiplexing the first and second traffic types for application to respective switching means at the switching end of the link, and

allocating bandwidth to particular types of traffic in response to customer demand.

11. A method as in claim 10, further comprising guaranteeing a minimum level of bandwidth for particular traffic types.

12. A method as in claim 10 wherein one of the traffic types is video data.

13. A method as in claim 10 wherein one of the said traffic types is computer originated data.

14. A method as in claim 10 wherein one of the traffic types is voice data or audio data.

15. A method of communicating over a network, the method comprising steps of:

switching a first type of traffic via a first switching means;

switching a second type of traffic via a second switching means;

connecting a user'"'"'s site to the network via a communications link;

multiplexing traffic of the first and second types for transmission over the link at the user'"'"'s end of the link;

de-multiplexing the first and second traffic types for application to respective switching means at the switching end of the link, and

multiplexing a third traffic type.

16. A method of communicating over a network, the method comprising steps of:

switching a first type of traffic via a first switching means;

switching a second type of traffic via a second switching means;

connecting a user'"'"'s site to the network via a communications link;

multiplexing traffic of the first and second types for transmission over the link at the user'"'"'s end of the link;

de-multiplexing the first and second traffic types for application to respective switching means at the switching end of the link,

wherein one of the traffic types is voice data or audio data,

identifying voice data, and

compressing the voice data to reduce transmission bandwidth requirements.

17. A method of communicating over a network, the method comprising steps of:

switching a first type of traffic via a first switching means;

switching a second type of traffic via a second switching means;

connecting a user'"'"'s site to the network via a communications link;

multiplexing traffic of the first and second types for transmission over the link at the user'"'"'s end of the link;

de-multiplexing the first and second traffic types for application to respective switching means at the switching end of the link,

wherein one of the traffic types is voice data or audio modulated data,

identifying facsimile encoded data, and

re-coding said facsimile data so as to facilitate efficient transmission.

18. A method of communicating over a network, the method comprising steps of:

switching a first type of traffic via a first switching means;

switching a second type of traffic via a second switching means;

connecting a user'"'"'s site to the network via a communications link;

multiplexing traffic of the first and second types for transmission over the link at the user'"'"'s end of the link;

de-multiplexing the first and second traffic types for application to respective switching means at the switching end of the link,

wherein one of the traffic types is voice data or audio data,

identifying audio encoded computer originated data from a modem, and

re-coding said data to facilitate efficient transmission.