Apparatus and methods for dynamic bandwidth allocation

Details Apparatus and methods for dynamic bandwidth allocation Apparatus and methods for dynamic bandwidth allocation

2005-04-05

2005-04-05

Nguyen, Steven (Department: 2665)

Multiplex communications

Communication techniques for information carried in plural...

Adaptive

C370S230000

Reexamination Certificate

active

06876668

ABSTRACT:
A system capable of dynamically reserving bandwidth and adjusting bandwidth reservations for active sessions of data communication in a data communications device is provided. The system generally separates the operation of bandwidth allocation and adjustment from the operation of data transport through the device, thereby allowing bandwidth reservations and adjustments to be made without disturbing sessions of data communication that are actively being transported through the device. The system can accept requests to allocate or reserve bandwidth in a data communications device using bandwidth reservation protocols such as RSVP. The reservation requests create sender state data that can be used to compute resource allocation data. The resource allocation data can be used to label data storage locations in a data storage mechanism according to the required bandwidth reservations. A data scheduling apparatus, which is ignorant of particular sessions and specific amounts of reserved bandwidth, examines data and deposits data into data storage locations having a label corresponding to a session identification specified in the data, if any. If an unknown or no session identification is specified in the data, the data scheduler deposits data into a data storage location that is unlabeled or that has an unreserved label. Thus session bandwidth is determined by the percentage of labeled data storage locations for the session. Changes in bandwidth reservations are reflected in the separate operation of alterations made in the data storage labeling scheme, and do not affect the data scheduler, or data dequeuing mechanisms, thus allowing data sessions to continue without interruption during bandwidth adjustments.

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Brandon, R. et al., “Resource ReSerVation Protocol (RSVP)—Version 1 Functional Specification,” <ftp://ftp/isi.edu/in-notes/rfc2205.txt>, Network Working Group Request for Comments, 99 pages, Sep. 1997.
Steve Berson, “RSVP Protocol Overview,” (Last Modified Mar. 5, 1999) <http://www.isi.edu/rsvp/overview.html>, 2 Pages.
Medhavi Bhatia, “QoS over the Internet: The RSVP protocol,” <http://www/cis/upenn.edu/˜bhatia/rsvp.html> (visited Apr. 30, 1999).

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