AIoT Uplink Response Linking via Request Identifier Mapping
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Solution Overview
Problem
The variability in response delays and routes for AIoT devices in uplink and downlink communications makes it challenging to associate network requests with their corresponding responses, particularly when different network nodes are involved in sending triggers and receiving responses.
Innovation Solution
A system and method are introduced to link uplink responses to downlink triggers by using a Response Identification Entity (RIE) that sends a request identifier alongside the AIoT triggering request, allowing the AIoT device to generate a response identifier, which is then mapped to the request identifier by the network, enabling accurate routing of responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple relay devices and routes are used to reach AIoT devices, then network coverage and connectivity are improved, but response delay variability increases and message association becomes challenging
Solution Approach 1:
The network node performs preliminary action by storing the downlink trigger message along with its identifier before receiving the uplink response. This allows the network to prepare the association context in advance, enabling quick matching when the response arrives through different relay paths, thus reducing response delay variability while maintaining network coverage through multiple routes
2Adaptability or versatility
If different network nodes send triggers and receive responses, then network flexibility is improved, but message association between downlink requests and uplink responses becomes difficult
Solution Approach 1:
The downlink trigger message acts as an intermediary carrier containing the request identifier. When the AIoT device sends the uplink response, it includes the same request identifier, creating a link between the response and the original downlink trigger. This intermediary mechanism enables any network node to correctly associate and route responses regardless of which node originated the trigger, thus maintaining network flexibility while preventing message association loss
3Use of energy by moving object
If relay devices store or forward requests based on AIoT device state, then power efficiency is improved, but response routing becomes more complex and association harder
Solution Approach 1:
The system implements feedback by having the AIoT device echo back the request identifier in its uplink response message. This feedback mechanism provides a clear reference that relay devices and network nodes can use to trace the message origin and correctly route the response, simplifying the routing complexity even when relay devices dynamically store or forward requests based on AIoT device power state
Data Source
AI summary
A system and method for linking uplink responses to downlink triggers are described. The system and method may enable the network to associate the network or request in the downlink with the ambient-power enabled IoT (AIoT) device(s) response in the uplink. The response identification entity (RIE) sends a request identifier alongside the initiated AIoT triggering request by a network network function (NF), such as the application function (AF), to the AIoT device. When an AIoT device receives the request, the AIoT device analyses the response message and sends a response message to the network. When the RIE receives the response message from the access and mobility management function (AMF), the RIE analyses the response message and associates the response with the request. The RIE sends the IDs of the NFs that have initiated the request to the AMF. The AMF uses the NF IDs to route the response.