The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 23, 1999
Filed:
Aug. 23, 1996
Qin Zheng, Boxborough, MA (US);
Mitsubishi Electric Information Technology Center America, Inc., Cambridge, MA (US);
Abstract
In a cell switched network such as an ATM network, a connection admission ntrol system is provided to establish connections which guarantee user requested end-to-end cell transmission delay bounds. The subject system uses, a bit stream approach to model the worst case cell generation pattern of a connection and provides mechanisms to construct new bit streams after the original ones are delayed, multiplexed, demultiplexed, or filtered within a network. Given arriving bit streams at a queueing point, a system is provided to obtain the worst-case cell queueing delay which is used to check if a connection can be established with the requested delay bounds. In one embodiment, the subject system uses the CBR/VBR traffic models as defined in the ATM Forum Traffic Management Specification Version 4.0 to derive the worst-case bit stream for a connection and calculates the worst case queueing delay based on the conventional static priority First In First Out, or FIFO, cell transmission scheduling at switches. The subject invention provides a simple and efficient way to support real-time CBR/VBR services as defined by the ATM Forum over existing ATM networks without requiring a sophisticated cell transmission scheduling mechanism at switches.