Wavelength Connectivity Advertisement in Optical Networks
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Solution Overview
Problem
Existing techniques for determining network node capabilities and constraints in communication networks are ineffective in certain situations, particularly in providing accurate wavelength connectivity information in real-time.
Innovation Solution
Network nodes establish and advertise wavelength connectivity information in real-time, using protocols like GMPLS to describe available wavelengths between input and output links, enabling effective circuit planning and resource reservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If known techniques are used to determine network node capabilities, then circuit setup information can be obtained, but the information may not be accurate or effective in certain situations
Solution Approach 1:
The patent implements a feedback mechanism where network nodes advertise their wavelength connectivity information to other nodes in real-time. This allows the network to maintain accurate and reliable information about available wavelengths and circuit capabilities, resolving the contradiction by continuously updating and verifying connectivity data across the network.
Solution Approach 2:
The patent establishes wavelength connectivity information in advance through advertisement mechanisms before circuit setup is needed. By pre-determining and broadcasting available wavelengths and node capabilities, the network ensures accurate information is available when circuit establishment is required, improving both precision and reliability.
2Loss of information
If wavelength connectivity information is advertised in real-time to all network nodes, then accurate information dissemination is achieved, but network complexity and communication overhead increase
Solution Approach 1:
The patent segments the advertisement process by allowing individual network nodes to advertise their specific wavelength connectivity information independently. Each node broadcasts its own capabilities and constraints, rather than requiring centralized management, which reduces overall network complexity while ensuring complete information availability.
Solution Approach 2:
The patent creates a universal advertisement mechanism that all network nodes can participate in independently. Each node serves multiple functions: it advertises its own capabilities, receives advertisements from other nodes, and uses this information for circuit setup. This multi-functional approach reduces the need for specialized management infrastructure.
Data Source
AI summary
In particular embodiments, providing wavelength connectivity information to a network includes establishing wavelength connectivity information for a network node of the network. The network node comprises link pairs, where a link pair has an input link and an output link. The wavelength connectivity information describes a set of available wavelengths between an input link and an output link. The wavelength connectivity information is inserted into an advertisement, and the advertisement is sent to at least a subset of the network nodes of the network in real time.