Preamble Mutualization in Sensor Networks
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Solution Overview
Problem
Existing channel access protocols in sensor networks lead to high energy consumption and increased risk of collision when multiple sensor nodes transmit data to sink nodes, as they require multiple preambles to be sent, each consuming energy and potentially causing channel access conflicts.
Innovation Solution
A method that allows nodes relaying a preamble to also transmit data to the same destination node without sending an additional preamble, enabling mutualization of preambles to reduce energy consumption and minimize channel occupancy and collision risks, by modifying the preamble to include information about subsequent data transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each sensor node transmits a preamble before sending data to sink nodes, then data transmission can be initiated, but energy consumption increases and collision risk increases
Solution Approach 1:
The patent merges multiple preambles into a single shared preamble that can be used by multiple sensor nodes for data transmission. Instead of each node transmitting its own preamble, nodes share a common preamble structure, thereby reducing the total number of preambles transmitted and lowering energy consumption while maintaining reliable data transmission capability.
Solution Approach 2:
The preamble is designed to serve multiple functions and multiple nodes simultaneously. A single preamble transmission can announce data transmission intentions of multiple sensor nodes, making the preamble a universal signal that performs channel access coordination for the entire network rather than individual nodes.
2Productivity
If multiple sensor nodes transmit preambles simultaneously to access the channel, then data transmission opportunities are secured, but collision risk on channel access increases
Solution Approach 1:
The patent implements a preliminary action mechanism where sensor nodes announce their data transmission intentions in advance through a shared preamble structure. This preliminary announcement allows the network to coordinate channel access before actual data transmission begins, preventing simultaneous transmissions and reducing collision risk while maintaining high throughput.
Solution Approach 2:
The preamble transmission mechanism incorporates feedback elements that allow sensor nodes to learn about channel conditions and transmission schedules from other nodes' preamble contents. This feedback enables nodes to adjust their transmission timing and avoid collisions, thereby improving channel access reliability without sacrificing productivity.
Data Source
AI summary
A data transmitter is provided for transmitting data that makes it possible for nodes, relaying the preamble transmitted by a transmitter node, to also transmit data to a single destination node without, in turn, transmitting another preamble. In a network comprising a plurality of nodes that alternately observe sleeping and waking periods in an asynchronous manner relative to each other, a node receives a first preamble that is transmitted by at least one transmitter node. The first preamble comprises at least one first set of information related to transmission, by the transmitter node, of a first data set to a destination node. The adjacent node transmits a second data set to the destination node or to another node from the transmission of the first data set.