Ambient IoT Interrogation Protocol for Energy-Limited Data Discovery
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Solution Overview
Problem
Existing Ambient Internet of Things (A-LoT) devices face power depletion during interrogations due to inefficient energy harvester capabilities, leading to incorrect information provision and system resource exhaustion.
Innovation Solution
Ambient IoT devices are powered by energy harvesters, and communication protocols are optimized to reduce message volume and processing by using random numbers and unique identifiers selectively, allowing devices to conserve energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If UEs respond to multiple messages or process large messages, then data exchange completeness is improved, but energy consumption increases faster than energy harvester can replenish
Solution Approach 1:
The patent applies partial action by implementing early termination of the interrogation process. When the reader device determines that it has received sufficient information (e.g., a predetermined number of unique identifiers or a target information type), it sends a termination message to stop further UE responses. This prevents UEs from expending energy on complete response sequences when full data exchange is unnecessary, directly resolving the contradiction between information completeness and energy consumption.
2Measurement precision
If UEs provide full unique identifiers in all interrogations, then information accuracy is improved, but power resources are depleted faster
Solution Approach 1:
The patent segments the information exchange process into phases: initial identification using random numbers, and detailed identification using unique identifiers only when necessary. The reader device determines whether full unique identifiers are needed based on the interrogation purpose, and if not, terminates the process early. This segmentation allows the system to maintain information accuracy when needed while extending device operation duration by avoiding unnecessary full identifier transmissions.
3Loss of information
If reader device requests complete inventory information from all UEs, then data completeness is improved, but system resources are exhausted
Solution Approach 1:
The patent implements feedback mechanisms where the reader device monitors the interrogation process and sends termination messages when sufficient information is obtained. The system continuously evaluates whether the collected data meets the required completeness threshold and adjusts the interrogation process accordingly, preventing system resource exhaustion while maintaining adequate data completeness.
4Reliability
If UEs respond to every interrogation message, then response reliability is improved, but energy depletion occurs in extreme cases
Solution Approach 1:
The patent applies preliminary action by having the reader device determine in advance whether complete UE responses are necessary based on the interrogation purpose. The reader device sends control messages that pre-specify the required information level, allowing UEs to conserve energy by not processing or transmitting full responses when the preliminary determination shows that abbreviated responses or early termination will suffice while maintaining response reliability.
Data Source
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AI summary
Method and system for communicating with user equipment, UE, the method comprising the steps of a reader device receiving a request to interrogate one or more UE. In response to the request, the reader device transmitting an initial message to the one or more UE. The one or more UE responding to the initial message by transmitting a first message. The reader device responding to the first message by sending a second message to the one or more UE unless the request received by the reader device to interrogate the one or more UE comprises data indicating that the second message is not required. When a second message is sent by the reader device to the one or more UE, the one or more UE responding to the second message with a third message unless data is received from the reader device by the one or more UE indicating that a response to a second message is not required.