System and method for allocating bandwidth for a call

• US 7,079,534 B1
• Filed: 09/05/2001
• Issued: 07/18/2006
• Est. Priority Date: 02/20/1998
• Status: Expired due to Term

• Current Assignee: Sprint Communications Company LP (Deutsche Telekom AG)
• Original Assignee: Sprint Communications Company LP (Deutsche Telekom AG)
• Inventors: Medhat, Khalid Mohamed, Gardner, Michael Joseph, Boldt, Dean Charles
• Primary Examiner(s): Chin, Wellington
• Assistant Examiner(s): MEW, KEVIN D
• Application Number:
  US09/947,818
• Time in Patent Office: 1,777 Days
• Field of Search: 370/389, 370/395.1, 370/398, 370/399, 370/395.2, 370/395.21, 370/395.32, 370/395.41, 370/395.52
• US Class Current: 370/389
• CPC Class Codes: H04L 12/5601 Transfer mode dependent, e.g. ATM
• CPC Class Codes: H04L 2012/5629 Admission control
• CPC Class Codes: H04L 2012/5679 Arbitration or scheduling
• CPC Class Codes: H04L 47/15 in relation to multipoint traffic arrangements for broadcast or multicast in data networks H04L12/18
• CPC Class Codes: H04L 47/20 Traffic policing
• CPC Class Codes: H04L 47/70 Admission control; Resource allocation
• CPC Class Codes: H04L 47/762 triggered by the network
• CPC Class Codes: H04L 47/821 Prioritising resource allocation or reservation requests
• CPC Class Codes: H04Q 2213/13003 Constructional details of switching devices
• CPC Class Codes: H04Q 2213/1305 Software aspects
• CPC Class Codes: H04Q 2213/13076 Distributing frame, MDF, cross-connect switch
• CPC Class Codes: H04Q 2213/13176 Common channel signaling, CCS7
• CPC Class Codes: H04Q 2213/13196 Connection circuit/link/trunk/junction, bridge, router, gateway
• CPC Class Codes: H04Q 2213/13332 Broadband, CATV, dynamic bandwidth allocation
• CPC Class Codes: H04Q 3/0025 Provisions for signalling

Abstract

A communication system includes a signaling processor that receives and processes SS7 message to select virtual paths. The communication system includes an interworking system that converts time division multiplex communications into asynchronous communications for transfer over the selected virtual paths. The communication system includes a bandwidth management system that allocates spare bandwidth from one virtual path to another based on messages from the signaling processor, but does not allow the bandwidth of a virtual path to exceed a maximum threshold.

Claims

1. A method of operating a communication system, the method comprising:

in a signaling processor, receiving and processing Signaling System Seven (SS7) messages for a plurality of calls to select virtual paths for the calls and to transfer control messages for the calls identifying the virtual paths;

in an interworking system, receiving the control messages and receiving user communications for the calls in a time division multiplex format;

in the interworking system, converting the user communications to an asynchronous format and transferring the user communications in the asynchronous format over the virtual paths in response to the control messages;

in a bandwidth management system, receiving and processing the control messages to determine if a first one of the virtual paths requires additional bandwidth and if the additional bandwidth would cause the first virtual path to exceed a maximum bandwidth allocation;

in the bandwidth management system, if the additional bandwidth is required and would not cause the first virtual path to exceed the maximum bandwidth allocation, then to determine if a second one of the virtual paths has spare bandwidth; and

in the bandwidth management system, if the additional bandwidth would not cause the first virtual path to exceed the maximum bandwidth allocation, then to allocate the additional bandwidth to the first virtual path and to de-allocate the spare bandwidth from the second virtual path.

2. The method of claim 1 wherein the asynchronous format comprises asynchronous transfer mode.

3. The method of claim 1 wherein the control messages are transferred over internet protocol links.

4. The method of claim 1 wherein the user communications in the asynchronous format identify the virtual paths in headers for the user communications.

5. The method of claim 1 wherein transferring the user communications in the asynchronous format over the virtual paths comprises transferring the user communications in the asynchronous format over the virtual paths to customer premises equipment.

6. The method of claim 1 further comprising, in the bandwidth management system, blocking subsequent calls in response to congestion.

7. The method of claim 1 further comprising, in the bandwidth management system, re-routing subsequent calls in response to congestion.

8. A communication system comprising:

a signaling processor configured to receive and process Signaling System Seven (SS7) messages for a plurality of calls to select virtual paths for the calls and to transfer control messages for the calls identifying the selected virtual paths;

an interworking system configured to receive the control messages and to receive user communications for the calls in a time division multiplex format, convert the user communications to an asynchronous format, and transfer the user communications in the asynchronous format over the selected virtual paths in response to the control messages; and

a bandwidth management system configured to receive and process the control messages to determine if a first one of the virtual paths requires additional bandwidth and if the additional bandwidth would cause the first virtual path to exceed a maximum bandwidth allocation, and if the additional bandwidth is required and would not cause the first virtual path to exceed the maximum bandwidth allocation, then to determine if a second one of the virtual paths has spare bandwidth, and if the second one of the virtual paths has spare bandwidth, the to allocate the additional bandwidth to the first virtual path and to de-allocate the spare bandwidth from the second virtual path.

9. The communication system of claim 8 wherein the asynchronous format comprises asynchronous transfer mode.

10. The communication system of claim 8 wherein the control messages are transferred over internet protocol links.

11. The communication system of claim 8 wherein the user communications in the asynchronous format identify the virtual paths in headers for the user communications.

12. The communication system of claim 8 wherein the interworking system transfers the user communications in the asynchronous format over the virtual paths to customer premises equipment.

13. The communication system of claim 8 wherein the bandwidth management system is configured to block subsequent calls in response to congestion.

14. The communication system of claim 8 wherein the bandwidth management system is configured to reroute subsequent calls in response to congestion.