Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Routing and bandwidth assignment for flexible grid wavelength switched optical networks

A technology of wavelength switching and optical network, which is applied in the direction of multiplexing system selection device, selection device, multiplex communication, etc.

Inactive Publication Date: 2014-04-23
TELEFON AB LM ERICSSON (PUBL)
View PDF2 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing RWA solutions are not directly applicable to BV-OXC due to frequency grid and different bandwidth granularity of optical signals

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Routing and bandwidth assignment for flexible grid wavelength switched optical networks
  • Routing and bandwidth assignment for flexible grid wavelength switched optical networks
  • Routing and bandwidth assignment for flexible grid wavelength switched optical networks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] The present invention will be described with respect to particular embodiments and with reference to certain drawings but the invention is not limited thereto but only by the claims. The drawings described are only schematic and non-limiting. In the drawings, the size of some of the elements may be exaggerated and not drawn on scale for illustrative purposes.

[0039] definition:

[0040] Where the term "comprising" is used in the present description and claims, it does not exclude other elements or steps, and should not be understood as being limited to the components listed thereafter. Where an indefinite or definite article is used when referring to a singular noun (eg "a" or "an", "the"), this includes a plural of that noun unless something else is specifically stated.

[0041] Elements or components of the nodes or networks may include logic encoded in the medium for performing any kind of information processing. Logic may include software encoded on a disk or o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Routing and bandwidth assignment of new paths of different bandwidths, occupying different numbers of adjacent frequency slots in a wavelength switched optical network (20), involves selecting (100) a route, and assigning (110, 120) a set of adjacent frequency slots. The assignment can place wider ones of the new paths at an opposite end of a spectrum of the available frequency slots, to an end where narrower ones are placed. A size of sets of available adjacent slots remaining after the assignment is likely to be increased, compared to a conventional first fit assignment. A wider subsequent new path can sometimes be accommodated along all or some of the route and thus the blocking probability can be lowered. The selecting of which of the possible routes to use can be made dependent on which has more sets of available adjacent frequency slots, or which has a wider gap between occupied slots.

Description

technical field [0001] The invention relates to a method of routing and wavelength assignment of new paths in a wavelength-switched optical network carrying paths of different bandwidths, a corresponding device and a corresponding computer program. Background technique [0002] ITU-T is currently revising Recommendation G.694.1 (G.694.1 "Spectral grids for WDM applications: DWDM frequency grid", ITU-T Recommendation, June 2002), which defines the minimum channel spacing for DWDM. Common frequency grid. Study Group 15 of the ITU-T is discussing what might be a more efficient grid spacing to be used in next generation optical networks. Bandwidth-Variable Optical Cross-Connect (BV-OXC) has currently been proposed to improve spectrum utilization in Wavelength Switched Optical Networks (WSON). An initial BV-OXC implementation is provided to illustrate operation with different modulation formats and bit rates. BV-OXC overcomes the fixed ITU-T grid spacing by enabling per-port a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04J14/02
CPCH04J14/0224H04J14/026H04J14/0267H04J14/0269H04J14/0257H04J14/0271H04J14/0227H04Q11/0062H04Q2011/0086
Inventor N.萨姆博F.库吉尼P.卡斯托尔迪G.博塔里P.伊奥瓦纳
Owner TELEFON AB LM ERICSSON (PUBL)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com