Method and system for sharing over-allocated bandwidth between different classes of service in a wireless network

• US 7,349,704 B2
• Filed: 09/01/2005
• Issued: 03/25/2008
• Est. Priority Date: 07/02/2001
• Status: Expired due to Term

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Patel, Achal R., Miernik, Jerzy, Choksi, Ojas T., Patel, Pulin R.
• Primary Examiner(s): D AGOSTA, STEPHEN M
• Application Number:
  US11/219,460
• Publication Number:
  US 20050286559A1
• Time in Patent Office: 936 Days
• Field of Search: 455/452.2, 455/445, 455/450, 455/451, 455/452.1, 455/453, 455/464, 370/231, 370/235, 370/237, 370/395.41, 370/395.42
• US Class Current: 455/453
• CPC Class Codes: H04W 28/20 Negotiating bandwidth
• CPC Class Codes: H04W 36/16 Performing reselection for specific purposes
• CPC Class Codes: H04W 72/56 based on priority criteria

Abstract

A method and system for sharing over-allocated bandwidth between different classes of service in a wireless network. Traffic is transmitted for a first service class in excess of bandwidth allocated to the first service class using unused bandwidth allocated to a second class. After transmitting traffic for the first service class in excess of bandwidth allocated to the first service class using unused bandwidth allocated to a second class, traffic for a third service class is transmitted in unused bandwidth remaining in the second service class.

Claims

1. A method for sharing bandwidth between service classes, comprising:

selectively allocating bandwidth among one or more of a first service class, a second service class, and a third service class;

transmitting traffic for the second service class in excess of bandwidth allocated to the second service class using unused bandwidth allocated to the third service class, wherein the third service class comprises a lower priority than the first service class and the second service class comprises a lower priority than the first service class, and wherein the second service class has a higher priority than the third service class, and wherein the third service class includes excess bandwidth that is accommodating non-bursty service classes or voice traffic;

coordinating bandwidth for each of the service classes such that the traffic is transmitted according to rules associated with the priorities of each of the service classes, and wherein the first service class has a substantial guarantee of traffic arrival, the second service class has a limited guarantee of traffic arrival, and the third service class has a substantially limited guarantee or no guarantee of traffic arrival; and

evaluating whether or not to leverage unused voice bandwidth to accommodate a bandwidth requirement for any service class before using unused bandwidth allocated to a lower priority service class, wherein the first service class comprises video traffic.

2. The method of claim 1, wherein the third service class comprises a best effort (BE) class of service, the second service class comprises an assured forwarding (AF) class of service, and the first service class comprises an expedited forwarding (EF) class of service.

3. The method of claim 1, wherein the second class comprises non-bursty traffic flows, and wherein the non-bursty traffic flows comprise voice traffic.

4. The method of claim 1, wherein the allocated bandwidths vary based on traffic volume in a service class, and wherein the allocated bandwidths are determined based on real time operating conditions.

5. A system for sharing bandwidth between service classes, comprising:

means for selectively allocating bandwidth among one or more of a first service class, a second service class, and a third service class;

means for transmitting traffic for the second service class in excess of bandwidth allocated to the second service class using unused bandwidth allocated to the third service class, wherein the third service class comprises a lower priority than the first service class and the second service class comprises a lower priority than the first service class, and wherein the second service class has a higher priority than the third service class, and wherein the third service class includes excess bandwidth that is accommodating non-bursty service classes or voice traffic;

means for coordinating bandwidth for each of the service classes such that the traffic is transmitted according to rules associated with the priorities of each of the service classes, and wherein the first service class has a substantial guarantee of traffic arrival, the second service class has a limited guarantee of traffic arrival, and the third service class has a substantially limited guarantee or no guarantee of traffic arrival; and

means for evaluating whether or not to leverage unused voice bandwidth to accommodate a bandwidth requirement for any service class before using unused bandwidth allocated to a lower priority service class, wherein the first service class comprises video traffic.

6. The system of claim 5, wherein the third service class comprises a best effort (BE) class of service, the second service class comprises an assured forwarding (AF) class of service, and the first service class comprises an expedited forwarding (EF) class of service.

7. The system of claim 5, wherein the second class comprises non-bursty traffic flows, and wherein the non-bursty traffic flows comprises voice traffic.

8. The system of claim 5, wherein the allocated bandwidths vary based on traffic volume in a service class, and wherein the allocated bandwidths are determined based on real time operating conditions.

9. Software for sharing bandwidth between service classes, the software being embodied in a computer readable medium and comprising computer code such that when executed is operable to:

selectively allocate bandwidth among one or more of a first service class, a second service class, and a third service class;

transmit traffic for the second service class in excess of bandwidth allocated to the second service class using unused bandwidth allocated to the third service class, wherein the third service class comprises a lower priority than the first service class and the second service class comprises a lower priority than the first service class, and wherein the second service class has a higher priority than the third service class, and wherein the third service class includes excess bandwidth that is accommodating non-bursty service classes or voice traffic;

coordinate bandwidth for each of the service classes such that the traffic is transmitted according to rules associated with the priorities of each of the service classes, and wherein the first service class has a substantial guarantee of traffic arrival, the second service class has a limited guarantee of traffic arrival, and the third service class has a substantially limited guarantee or no guarantee of traffic arrival; and

evaluate whether or not to leverage unused voice bandwidth to accommodate a bandwidth requirement for any service class before using unused bandwidth allocated to a lower priority service class, wherein the first service class comprises video traffic.

10. The medium of claim 9, wherein the third service class comprises a best effort (BE) class of service, the second service class comprises an assured forwarding (AF) class of service, and the first service class comprises an expedited forwarding (EF) class of service.

11. The medium of claim 9, wherein the second class comprises non-bursty traffic flows, and wherein the non-bursty traffic flows comprise voice traffic.

12. The medium of claim 9, wherein the allocated bandwidths vary based on traffic volume in a service class, and wherein the allocated bandwidths are determined based on real time operating conditions.

13. An apparatus for sharing bandwidth between service classes, comprising:

a gateway operable to allocate bandwidth among one or more of a first service class, a second service class, and a third service class, the gateway being further operable to transmit traffic for the second service class in excess of bandwidth allocated to the second service class using unused bandwidth allocated to the third service class, wherein the third service class comprises a lower priority than the first service class and the second service class comprises a lower priority than the first service class, and wherein the second service class has a higher priority than the third service class, and wherein the third service class includes excess bandwidth that is accommodating non-bursty service classes or voice traffic, whereby bandwidth is coordinated for each of the service classes such that the traffic is transmitted according to rules associated with the priorities of each of the service classes, and wherein the first service class has a substantial guarantee of traffic arrival, the second service class has a limited guarantee of traffic arrival, and the third service class has a substantially limited guarantee or no guarantee of traffic arrival, and wherein a determination is made as to whether or not to leverage unused voice bandwidth to accommodate a bandwidth requirement for any service class before using unused bandwidth allocated to a lower priority service class, wherein the first service class comprises video traffic.

14. The apparatus of claim 13, wherein the third service class comprises a best effort (BE) class of service, the second service class comprises an assured forwarding (AF) class of service, and the first service class comprises an expedited forwarding (EF) class of service.

15. The apparatus of claim 13, wherein the second class comprises non-bursty traffic flows, and wherein the non-bursty traffic flows comprise voice traffic.

16. The apparatus of claim 13, wherein the allocated bandwidths vary based on traffic volume in a service class, and wherein the allocated bandwidths are determined based on real time operating conditions.

17. An apparatus for sharing bandwidth between service classes in a wireless network, comprising:

a gateway operable to transmit traffic for a first service class in excess of bandwidth allocated to the first service class using unused bandwidth allocated to a third service class, the gateway being further operable to transmit the traffic for the first service class in unused bandwidth remaining in a second service class in cases where a bandwidth requirement for the traffic is not met by using the unused bandwidth allocated to the third service class, wherein the third service class comprises a lower priority than the first service class and the second service class comprises a lower priority than the first service class, and wherein the third service class includes excess bandwidth that is accommodating non-bursty service classes or voice traffic, whereby bandwidth is coordinated for each of the service classes such that the traffic is transmitted according to rules associated with the priorities of each of the service classes, and wherein the first service class has a substantial guarantee of traffic arrival, the second service class has a limited guarantee of traffic arrival, and the third service class has a substantially limited guarantee or no guarantee of traffic arrival, and wherein a determination is made as to whether or not to leverage unused voice bandwidth to accommodate a bandwidth requirement for any service class before using unused bandwidth allocated to a lower priority service class, wherein the first service class comprises video traffic.

18. The apparatus of claim 17, wherein the third service class comprises a best effort (BE) class of service, the second service class comprises an assured forwarding (AF) class of service, and the first service class comprises an expedited forwarding (EF) class of service.

19. The apparatus of claim 17, wherein the second class comprises non-bursty traffic flows, and wherein the non-bursty traffic flows comprise voice traffic.