Wireless Network Information Distribution via State-Based Multicast
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Solution Overview
Problem
Conventional wireless networks face increased traffic and load due to the need for repeated information transmission to multiple nodes in a dense network, which is not effectively addressed by existing multicast protocols.
Innovation Solution
An information distribution method that determines the state of receiving nodes and creates a distribution list to send status data directly to nodes in a given state, reducing the number of transmissions by using a unicast protocol only when necessary, thereby minimizing network traffic and load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unicast protocol is used to send information to each receiving node individually, then information can be delivered to all nodes, but the number of transmissions increases proportionally to the number of receiving nodes, causing increased network traffic and load
Solution Approach 1:
The patent merges multiple unicast transmissions into a single multicast transmission by identifying receiving nodes in the same state and sending information to all of them simultaneously through one multicast packet, thereby reducing network traffic while maintaining complete information delivery
Solution Approach 2:
The patent segments the receiving nodes into different groups based on their states (e.g., moving state, stationary state), and applies different transmission strategies to each segment - using multicast for nodes in the same state and unicast for nodes in different states, optimizing both delivery reliability and traffic efficiency
2Quantity of substance
If multicast protocols (DVMRP, MOSPF) are used to reduce transmissions, then network load decreases, but path control packets and long data headers cause network congestion in dense wireless networks
Solution Approach 1:
The patent uses simple state identification parameters instead of complex multicast protocol mechanisms, creating lightweight transmission packets that do not require extensive path control overhead, thus reducing protocol complexity while achieving efficient multicast functionality
Solution Approach 2:
The patent extracts only the essential function of multicast (sending to multiple nodes in the same state) from the complex multicast protocol suite, implementing a simplified version that uses basic state comparison and direct transmission without the overhead of path control packets and long data headers
3Reliability
If information is sent repeatedly to each node, then all nodes receive the information reliably, but the sending node's transmission workload increases with the number of receiving nodes
Solution Approach 1:
The patent combines multiple individual transmissions into a single multicast transmission for nodes in the same state, dramatically reducing the sending node's transmission workload while ensuring all target nodes receive the information reliably through the multicast mechanism
Data Source
AI summary
An information distribution method for sending similar information from a sending node to all of receiving nodes in a given state in a dense wireless network. The sending node sends, only one time, information including status data directly to all of receiving nodes in an area where communication with the sending node is possible, not via a node other than the respective receiving nodes. Thereafter, the sending node determines whether or not any record corresponding to a receiving node to which the information should be sent is left in a distribution list. Only when it is determined that any record corresponding to a receiving node is left in the distribution list, the sending node sends information similar in content to the information sent in the directly sending step to the receiving node corresponding to the record left in the distribution list by using a unicast protocol.