Multicast Network Interconnection via Central Agent Path
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Solution Overview
Problem
Nodes in separate networks and Destination Oriented Directed Acyclic Graphs (DODAGs) belonging to the same multicast group often fail to receive multicast data due to their configuration to communicate only within their own networks, leading to incomplete distribution of multicast data.
Innovation Solution
A central agent identifies paths between networks with members of the same multicast group and establishes connections between them using a shortest-path algorithm, enabling the distribution of multicast data across multiple networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If nodes are configured to communicate only within their own networks (intra-PAN communication), then network configuration complexity is reduced and stability is maintained, but multicast data distribution completeness deteriorates when members span multiple networks
Solution Approach 1:
The patent introduces an intermediary mechanism where root nodes of different DODAGs act as mediators to establish inter-network multicast routing. The root nodes exchange multicast group information and establish forwarding paths between networks, allowing multicast data to traverse multiple networks while maintaining individual network configuration simplicity.
Solution Approach 2:
The solution segments the multicast routing function into two parts: intra-network routing handled by individual DODAGs and inter-network routing handled by root node coordination. This segmentation allows each network to maintain its own configuration simplicity while enabling complete multicast distribution through coordinated root nodes.
2Reliability
If nodes establish connections across multiple networks to enable multicast distribution, then multicast data distribution completeness is improved, but path determination complexity and communication overhead increase
Solution Approach 1:
The patent implements preliminary action by having root nodes proactively exchange multicast group membership information before actual multicast data transmission. This advance information exchange enables pre-establishment of routing paths, reducing the complexity of real-time path determination when multicast data needs to be transmitted across networks.
3Reliability
If inter-network multicast routing is enabled, then multicast data distribution coverage is improved, but energy consumption and communication overhead increase
Solution Approach 1:
The patent applies partial action by enabling inter-network multicast routing only for specific multicast groups that have members in multiple networks, rather than establishing universal inter-network routing for all traffic. This selective approach reduces unnecessary energy consumption and communication overhead while maintaining complete coverage for actual multicast needs.
Data Source
AI summary
Techniques for connecting networks to facilitate distribution of data are described. For example, to distribute multicast data to members of a multicast group that span multiple networks, the techniques may identify a path between networks that each have a member of the multicast group, such as a shortest path between networks. The techniques may inform the networks on the path to establish a connection with an adjacent network. This may allow multicast data for a multicast group to be distributed to members of the multicast group that are located in separate networks.