Mesh Node Wake-Up Signal Context Routing
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Solution Overview
Problem
In wireless mesh networks, particularly Bluetooth mesh networks, the existing wake-up radio approach introduces significant delays due to the need for sequential multi-step procedures at each hop, and nodes may not know the address of the next-hop node, making it inefficient for multi-hop scenarios.
Innovation Solution
Incorporating context information in the wake-up signal message that specifies the path between the source and destination nodes, allowing only relevant nodes to wake up, thereby reducing unnecessary power consumption and latency by eliminating the need for sequential acknowledgments and activating only necessary nodes in the path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the existing wake-up radio approach is used in Bluetooth mesh networks, then power consumption is reduced by keeping receivers off, but significant delays are introduced due to sequential multi-step procedures at each hop
Solution Approach 1:
The patent applies preliminary action by including context information (source address, destination address, next-hop address) in the wake-up signal message before transmission. This allows receiving nodes to pre-determine whether they need to wake up by checking if their address matches the next-hop address in the context information, eliminating the need for sequential wake-up procedures and acknowledgments at each hop.
2Use of energy by moving object
If the existing wake-up radio approach is used, then nodes save power by staying in sleep mode, but nodes may not know the address of the next-hop node making the procedure inefficient
Solution Approach 1:
The patent applies segmentation by dividing the wake-up signal message into distinct components: context information (source address, destination address, next-hop address) and payload data. This segmentation allows receiving nodes to efficiently process only the relevant next-hop address portion to determine whether to wake up, improving transmission efficiency while maintaining power savings.
Solution Approach 2:
The patent uses the context information in the wake-up signal message as an intermediary that carries routing information (next-hop address) without requiring separate control messages. This intermediary mechanism allows nodes to determine their participation in the data path and wake up accordingly, eliminating the need for additional signaling exchanges.
3Reliability
If sequential multi-step procedures are used at each hop for wake-up, then reliable data transmission is achieved, but significant delays are introduced due to repeated wake-up procedures
Solution Approach 1:
The patent merges the wake-up signal transmission with the data transmission process by including all necessary routing context information (source address, destination address, next-hop address) in a single wake-up signal message. This combining allows receiving nodes to process multiple pieces of information simultaneously and wake up only if needed, eliminating the need for separate wake-up procedures at each hop while maintaining reliable transmission.
Data Source
AI summary
A method of waking up a mesh node in a wireless mesh network, wherein said mesh node comprises a main receiver and a wakeup receiver, and wherein said method comprises the steps of receiving, by said wakeup receiver of said mesh node, a wake up signal message, wherein said wake up signal message comprises context information which is related to a path between a source mesh node and a destination mesh node corresponding to said wake up signal message, determining, by said wakeup receiver of said mesh node, that said context information is applicable for said mesh node, activating, by said wakeup receiver of said mesh node, said main receiver of said mesh node for subsequently receiving a data message.