ASEAN Control Channel Flooding for Multi-Layer ASON Networks
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Solution Overview
Problem
The flooding mechanism in existing multi-layer ASON/GMPLS networks is inefficient, leading to a significant increase in the number of TE LSA packets, which severely affects routing performance due to the multiplication of packets across more TE links and control channels compared to single-layer networks.
Innovation Solution
Implement a filtering rule-based approach to determine the appropriate control channel for flooding data packets based on the layer type of traffic engineering links, reducing the number of packets sent by only using control channels that allow flooding, thereby optimizing bandwidth usage and improving routing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flooding mechanism is adopted for multi-layer networks with more TE links and control channels, then complete topology information synchronization is achieved, but the number of TE LSA packets is multiplied and routing performance deteriorates
Solution Approach 1:
The patent segments the control channels into different types (e.g., intra-layer and inter-layer control channels) and applies different flooding strategies to each type. TE LSA packets are selectively flooded only on appropriate control channels based on the layer type of the corresponding TE link, rather than flooding on all control channels. This segmentation reduces the number of packet transmissions while ensuring complete topology synchronization.
Solution Approach 2:
The patent applies local quality by making each control channel have specific flooding permissions based on its type. Each TE link's attribute information is associated with a specific layer type, and only control channels of corresponding types are used for flooding. This localized approach ensures that each packet is transmitted only where necessary, improving routing performance while maintaining synchronization reliability.
2Reliability
If TE LSA packets are flooded on all control channels, then topology synchronization is ensured, but bandwidth occupation increases
Solution Approach 1:
The patent extracts and removes unnecessary packet transmissions by identifying which control channels should not receive TE LSA packets based on layer type matching. Instead of flooding on all control channels, the mechanism extracts only the relevant control channels for each TE link and floods packets only on those channels, thereby reducing bandwidth occupation while maintaining synchronization.
Solution Approach 2:
The patent applies partial action by flooding TE LSA packets on only a subset of control channels (those whose layer types match the TE link layer type) rather than on all control channels. This partial flooding approach is sufficient to achieve complete topology synchronization across the multi-layer network while significantly reducing bandwidth consumption.
Data Source
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AI summary
Embodiments of the present invention provide an information transmission method, a communication device and a communication system. The method includes: in a multi-layer network, obtaining a data packet including attribute information of a traffic engineering link locally; according to a layer type of the traffic engineering link corresponding to the attribute information of the traffic engineering link in the data packet, looking up a control channel allowing flooding the data packet based on a preset filtering rule, where the filtering rule includes a corresponding relationship between a layer type of the control channel and the layer type of the traffic engineering link; and sending the data packet from the control channel allowing flooding the data packet to connected a neighbor node. Embodiments of the present invention also provide a corresponding communication device and a communication system.