Method and device for efficient bandwidth management

Multiplex communications – Data flow congestion prevention or control – Control of data admission to the network

Reexamination Certificate

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Details

C370S230000, C370S412000

Reexamination Certificate

active

07065048

ABSTRACT:
The present invention provides a method, computer-readable medium and device for dynamically managing allocation of bandwidth in a packet network using a Dynamic Setting Scheme (DSS) for Class Based Queuing (CBQ). The method includes the steps of maintaining a minimized reserved portion of bandwidth to minimize delay jitter and maximizing a shared portion of bandwidth to maximize overall bandwidth utilization. Allocation of bandwidth may be based on a sharing tree hierarchical scheme that provides for temporary borrowing of bandwidth by real-time applications from bandwidth of non-real-time applications and blocks borrowing of bandwidth by non-real-time applications from bandwidth of real-time applications. DSS typically provides for using measurable parameters, such as queue length and number of borrowing attempts per a predetermined length of time/observation window, as control triggers for implementing adjustment of bandwidth allocation. In one embodiment, the steps include measuring a predetermined parameter at predetermined observation window times and dynamically adjusting allocated bandwidth for parent classes of real-time traffic by adjusting an average of the predetermined parameter to have a value within a predetermined stable region.

REFERENCES:
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patent: 6560230 (2003-05-01), Li et al.
patent: 6570883 (2003-05-01), Wong
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S. Floyd and V. Jacobson, “Link-Sharing and Resource Management Models for Packet Networks”, IEEE/ACM Transactions on Networking, vol. 3 No. 4, Aug. 1995, pp. 1-22.

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