Synchronized Multi-Sink Routing for Wireless Nodes
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Solution Overview
Problem
Conventional routing methods for low-power and lossy wireless networks (LLNs) are not optimized for multi-sink routing, leading to inefficiencies in packet delivery and increased overhead, particularly due to the lack of synchronization with multiple data sinks, which affects network reliability and energy efficiency.
Innovation Solution
A method for synchronized multi-sink routing where a node synchronizes its clock with a primary data sink and maintains clock offsets for secondary data sinks, allowing for simultaneous data packet transmission to multiple sinks without updating the synchronization, enabling adaptive switching between sinks based on network conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a node switches transmission from one data sink to another in conventional unsynchronized multi-sink routing, then the node can adapt to changing network conditions, but additional synchronization process increases delay
Solution Approach 1:
The node performs preliminary synchronization with multiple data sinks before switching is needed. By pre-establishing synchronized connections with both primary and secondary data sinks, the node eliminates the need for synchronization updates when switching occurs, thereby reducing delay while maintaining adaptability
2Device complexity
If conventional routing methods are used for multi-sink routing in LLNs, then routing is simpler to implement, but network overhead increases and reliability decreases
Solution Approach 1:
The invention changes the synchronization parameter state by maintaining continuous synchronization with multiple data sinks simultaneously. This parameter change enables the node to switch between sinks without loss of synchronization status, improving reliability while keeping implementation complexity manageable through standardized synchronization procedures
3Reliability
If multiple copies of data are transmitted to multiple data sinks using multiple paths, then data delivery reliability increases, but network overhead becomes excessive
Solution Approach 1:
Instead of transmitting multiple copies of data to multiple sinks, the invention applies partial action by transmitting single copies to synchronized sinks. The synchronization mechanism provides the reliability benefit without the excessive overhead of redundant transmissions, achieving the right balance through selective application of synchronization rather than redundant data copying
Data Source
AI summary
A method transmitting packets in a wireless network including a node, a first data sink and a second data sink is disclosed. The method performs a synchronization of the node with the first data sink and the second data sink and transmits first data packets from the node to the first data sink at a first allocated time synchronized with the first data sink. Next, the method transmits second data packets from the node to the second data sink at a second allocated time synchronized with the second data sink. The first and the second data packets are transmitted without updating the synchronization.