EP0797374A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Synchronous transmission system adapted to carry both synchronous and asynchronous traffic
Assignee: Nortel Networks Ltd
•
Filing: 1997-03-21
•
Granted: —
•
Expires: 2017-03-21
Abstract
Abstract A synchronous transmission system is adapted to carry both synchronous and asynchronous traffic and has a number of nodes providing ingress and egress of the traffic. Each node includes first and second ATM/SDH identifiers whereby the switch can separate the synchronous and asynchronous traffic. Separate processing of synchronous and asynchronous traffic is performed at each node.
Inventors
- 👤 Peter Holland
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 13:42
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/16; H04J3/1605; H04J3/1611; H04J3/1617; H04J2203/00; H04J2203/0001; H04J2203/0089; H04L; H04L12/00; H04L12/54; H04L12/56; H04L12/5601; H04L2012/5672
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
70 words
A synchronous transmission system adapted to carry both synchronous and asynchronous traffic in virtual containers each provided with a respective path overhead, the system having a number of nodes providing ingress and egress of said traffic, wherein means are provided at said nodes for identifying the synchronous and asynchronous traffic from said path overheads and means for performing separate switching of the identified synchronous and asynchronous traffic at that node.
Claim 2
Dependent Claim
42 words
A system as claimed in claim 1, wherein each said node incorporates a switch, said switch being interfaced to the network via first and second ATM/SDH identifiers whereby in use the switch is enabled to differentiate between the synchronous and asynchronous traffic.
Claim 3
Dependent Claim
27 words
A system as claimed in claim 1, and including network manager means whereby in use the switch is enabled to differentiate between the synchronous and asynchronous traffic.
Claim 4
Dependent Claim
21 words
A system as claimed in claim 3, and including means for demultiplexing synchronous traffic via a cross-connect to a synchronous interface.
Claim 5
Dependent Claim
21 words
A system as claimed in claim 4, and including a cell switch coupled to an asynchronous interface for processing asynchronous traffic.
Claim 6
Dependent Claim
52 words
A multiplexer/demultiplexer node for a synchronous network carrying synchronous and asynchronous traffic in virtual containers each provided with a path header, the node including means for identifying the synchronous and asynchronous traffic from said path overheads and means for performing separate switching of the identified synchronous and asynchronous traffic at that node.
Claim 7
Independent Claim
72 words
A method of processing communications traffic comprising synchronous traffic and asynchronous traffic carried in virtual containers and received at a synchronous network node, the method including providing each said virtual container with a path overhead, providing in said path overhead information identifying the traffic as synchronous or asynchronous, retrieving said identifying information at said node, and, responsive to said retrieval, providing separate switching of the synchronous and asynchronous traffic at the node.
Claim 8
Dependent Claim
20 words
A method as claimed in claim 7, wherein said identifying information comprises a signal label byte in said path overhead.
Claim 9
Dependent Claim
20 words
A method as claimed in claim 7, wherein said identifying information comprises a path trace byte in said path overhead.
Claim 10
Dependent Claim
27 words
A method as claimed in claim 9, wherein said information retrieval is performed from a look-up table providing a matching between path traces and respective traffic types.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.