Multiplex communications – Pathfinding or routing – Combined circuit switching and packet switching
Reexamination Certificate
1999-02-11
2001-11-06
Kizou, Hassan (Department: 2662)
Multiplex communications
Pathfinding or routing
Combined circuit switching and packet switching
C370S401000, C370S477000, C370S521000, C375S240000, C348S384100
Reexamination Certificate
active
06314095
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to method and apparatus for a high-speed multimedia content switch with compressed Internet Protocol header.
BACKGROUND OF THE INVENTION
Today's high-end Internet Protocol (IP) router is capable of switching several million packets per second (PPS). When a real-time transport protocol (RTP) header compression function is turned on for Voice over IP (VOIP) applications, however, the switching rate of the IP router is reduced to 10,000 PPS, which is equivalent to less than two (2) full duplex T1 compressed VoIP traffic.
The only solution today is to use a faster central processing unit (CPU) on the IP router for RTP header compression and IP switching tasks. A two hundred megahertz (200 MHz) CPU on the Cisco™ 7500 router could increase the packet-processing rate to 10,000 PPS, which is still too slow for large scale VoIP applications. For example, process-switching the VoIP traffic with RTP header compression on an optical carrier (OC)-3 fiber link (155 Mega) requires at least seventy-five (75) high-end Cisco™ 7500 series routers.
Thus, there exists a need for a scheme that allows the IP router to transparently switch various multimedia content with a compressed RTP header at its native speed (million PPS) through the IP network, such as switching digitized VoIP network.
REFERENCES:
patent: 5293379 (1994-03-01), Carr
patent: 5307413 (1994-04-01), Denzer
patent: 5446736 (1995-08-01), Gleeson et al.
patent: 5535199 (1996-07-01), Amri et al.
patent: 5627829 (1997-05-01), Gleeson et al.
patent: 5633891 (1997-05-01), Rebec et al.
patent: 5673322 (1997-09-01), Pepe et al.
patent: 6115384 (2000-09-01), Parzych
Viswanathan et al. “A Proposed Architecture For MPLS”, Internet Draft, Jul. 1997.*
Rosen, E.C.; Cisco Systems, Inc.; Viswanathan, A.; Lucent Technologies; Callon, R.; Ironbridge Networks, Inc.; “Multiprotocol Label Switching Architecture” Network Working Group-Internet Draft; Feb. 1999; http:/ / www.ietf.org/shadow.html.
Casner, S.; Jacobson, V.; “Compressing IP/UDP/RTP Headers for Low-Speed Serial Links” Feb. 1999; URL ftp://ftp.isi.edu/in-notes/rfc2508.txt.
Degermark, M.; Nordgren, B.; Pink, S.; “IP Header Compression” Feb. 1999; URL ftp: / / ftp.isi.edu/in-notes/rfc2507.txt.
Hughes Terri S.
Kizou Hassan
Mansfield Heather L.
Motorola Inc.
Pappas Joanne N.
LandOfFree
Method and apparatus for a high-speed multimedia content... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for a high-speed multimedia content..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for a high-speed multimedia content... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2605749