Title:
METHOD AND APPARATUS FOR BANDWIDTH OPTIMIZATION IN NETWORK RING TOPOLOGY
Document Type and Number:
WIPO Patent Application WO2003098879
Kind Code:
A3
Abstract:
A data traffic network element for a line switched ring network. The network has a data ingress point for receiving ingress payload data having multiple working connections transported in respective timeslots, at least one of the connections being passed through the network element. The network also has a data egress point for releasing egress payload data in the ring network including the connection. The traffic network element includes a timeslot interchange entity for interchanging the connection to a timeslot in the egress payload data different from the timeslot of the connection in the ingress payload data, wherein data over the connection is transported to and from said network element in different timeslots. One advantage of the network element with the timeslot interchange is the ability to provide a better bandwidth utilization by allowing to set connections over otherwise stranded bandwidth. In a specific example of implementation, the ring network is a BLSR ring network that uses the SONET protocol for data transmission. The timeslot interchange entity has the ability to store information identifying currently implemented timeslot interchanges. This information is available for access by protection switching logic during protection switching operations.
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Inventors:
ALLAYE-CHAN MARK (CA)
DE BOER EVERT (CA)
WARREN PAUL (CA)
DE BOER EVERT (CA)
WARREN PAUL (CA)
Application Number:
PCT/CA2003/000728
Publication Date:
May 06, 2004
Filing Date:
May 15, 2003
Export Citation:
Assignee:
NORTEL NETWORKS LTD (CA)
ALLAYE-CHAN MARK (CA)
DE BOER EVERT (CA)
WARREN PAUL (CA)
ALLAYE-CHAN MARK (CA)
DE BOER EVERT (CA)
WARREN PAUL (CA)
International Classes:
H04J3/08; H04Q11/04; (IPC1-7): H04L12/43; H04J3/08; H04J3/16; H04L12/437; H04L12/46; H04L29/14
Foreign References:
| EP1185014A2 | 2002-03-06 | |||
| EP0645905A2 | 1995-03-29 | |||
| EP0920153A2 | 1999-06-02 |
Other References:
"S/DMS TransportNode Overview", NORTEL NETWORKS S/DMS TRANSPORTNODE OVERVIEW, 1996, pages 1 - 136, XP002252611, Retrieved from the Internet [retrieved on 20030822]
"Network Hierarchy and Multilayer Survivability - Draft", IETF - TRAFFIC ENGINEERING WORKING GROUP, January 2002 (2002-01-01), XP002268144, Retrieved from the Internet [retrieved on 20040126]
"Network Hierarchy and Multilayer Survivability - Draft", IETF - TRAFFIC ENGINEERING WORKING GROUP, January 2002 (2002-01-01), XP002268144, Retrieved from the Internet
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