Technique for implementing an admission control scheme for data flows

1. A method for implementing an admission control scheme for data flows, the method comprising the steps of:

determining a current error value in response to a queue size in a packet buffer;

generating a packet drop probability based at least in part on the current error value;

receiving a data packet having one or more specified data types; and

determining whether to reject or accept the received data packet at a queue based at least in part on the packet drop probability and a predetermined flow rejection threshold;

wherein the packet drop probability is used to control congestion associated with the queue.

2. The method of claim 1 , wherein the one or more specified data types indicate an initialization of a data flow.

3. The method of claim 1 , wherein the step of determining further comprises the step of:

determining whether the packet drop probability is greater than or equal to the predetermined flow rejection threshold.

4. The method of claim 1 , wherein the queue size is maintained at a predetermined queue threshold.

5. The method of claim 1 , wherein the step of determining further comprises the step of:

sending a signal to at least one source of the data packet to reduce an associated sending rate.

6. The method of claim 1 , wherein the step of controlling further comprises the step of:

determining whether a randomly generated number is less than or equal to the packet drop probability.

7. A method for implementing an admission control scheme for data flows, the method comprising the steps of:

determining a current error value in response to a queue size in a packet buffer;

generating a packet drop probability based at least in part on the current error value;

receiving a data packet having a data type;

determining whether to reject or accept the received data packet at a queue based at least in part on the packet drop probability and a predetermined flow rejection threshold; and

using the packet drop probability to control congestion associated with the queue;

wherein the step of controlling further comprises the step of:

determining whether a count variable is greater than or equal to an inter-drop interval.

8. The method of claim 7 , wherein the inter-drop interval comprises an inverse of the packet drop probability.

9. A system for implementing an admission control scheme for data flows, the system comprising:

an active queue management module for determining a current error value in response to a queue size in a packet buffer and for generating a packet drop probability based at least in part on the current error value;

a packet receiver for receiving a data packet having one or more specified data types; and

an admission control module for determining whether to reject or accept the received data packet at a queue based at least in part on the packet drop probability and a predetermined flow rejection threshold.

10. The system of claim 9 , wherein the one or more specified data types indicates an initialization of a data flow.

11. The system of claim 9 , wherein the admission control module determines whether the packet drop probability is greater than or equal to the predetermined flow rejection threshold.

12. The system of claim 9 , wherein the packet drop probability is used to control congestion associated with the queue.

13. The system of claim 12 , wherein the queue size is maintained at a predetermined queue threshold.

14. The system of claim 12 , wherein a signal is sent to at least one source of the data packet to reduce an associated sending rate.

15. The system of claim 12 , further comprising:

a random number generator for generating a random number; and

a drop decision logic for determining whether the random number is less than or equal to the packet drop probability.

16. A system for implementing an admission control scheme for data flows, the system comprising:

an active queue management module for determining a current error value in response to a queue size in a packet buffer and for generating a packet drop probability based at least in part on the current error value;

a packet receiver for receiving a data packet having a data type; and

an admission control module for determining whether to reject or accept the received data packet at a queue based at least in part on the packet drop probability and a predetermined flow rejection threshold;

wherein an inter-drop interval is computed from the packet drop probability and the packet drop probability is used to control congestion associated with the queue; and

a drop decision logic for determining whether a count variable is greater than or equal to the inter-drop interval.

17. The system of claim 16 , wherein the inter-drop interval comprises an inverse of the packet drop probability.

18. A computer readable media for implementing an admission control scheme for data flows, comprising:

computer program code to determine a current error value in response to a queue size in a packet buffer;

computer program code to generate a packet drop probability based at least in part on the current error value;

computer program code to receive a data packet having a data type; and

computer program code to determine whether to reject or accept the received data packet at a queue based at least in part on the packet drop probability and a predetermined flow rejection threshold.