IoT Handover Using Resume ID for Context Retrieval
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Solution Overview
Problem
In wireless communication systems, IoT devices face challenges when switching between cells, leading to energy wastage and spectrum inefficiency due to the inability to timely transfer UE context from the old base station to the new one, resulting in fallback to legacy attach procedures.
Innovation Solution
Implementing a method where IoT devices provide a Resume ID to the new base station to retrieve and transfer the UE context, allowing for seamless resumption of connections without extended signaling, thereby avoiding legacy attach procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If IoT devices use legacy attach procedures when switching cells, then connection establishment is possible, but energy consumption increases and spectrum efficiency decreases
Solution Approach 1:
The network stores context information (including Resume ID) in advance at the old base station before the device switches cells. When the device moves to a new base station, the context can be quickly retrieved using the pre-stored Resume ID, avoiding the need to perform complete attach procedures and thus saving energy while maintaining connection reliability.
Solution Approach 2:
The Resume ID acts as an intermediary identifier that enables the new base station to retrieve the device's context information from the old base station without requiring the device to re-establish the entire connection. This intermediary mechanism facilitates efficient context transfer and reduces energy consumption.
2Productivity
If IoT devices perform complete attach procedures during handover, then connection is re-established, but spectrum efficiency deteriorates due to extended signaling
Solution Approach 1:
The invention extracts only the essential context information (including the Resume ID) from the complete attach procedure. Instead of performing full authentication and setup again, the system retrieves only the necessary context using the Resume ID, significantly reducing signaling overhead while maintaining handover efficiency.
Solution Approach 2:
The context information is copied and stored at the old base station in advance. When handover occurs, this copied context can be quickly transferred to the new base station using the Resume ID, avoiding the need to re-generate all connection parameters and reducing signaling requirements.
3Reliability
If UE context is not transferred timely during cell switching, then connection can be maintained, but energy wastage and spectrum inefficiency occur
Solution Approach 1:
The system performs preliminary storage of context information at the old base station before the device actually switches cells. This advance preparation ensures that when handover occurs, the context is already available for quick retrieval, maintaining connection continuity while preventing energy wastage that would result from delayed context transfer.
Data Source
AI summary
A system is disclosed in which a base station receives, from a communication device, a request for establishing a communication connection via the base station. The base station obtains information indicating from where a context associated with a previously established communication connection can be retrieved; retrieves the context associated with the previously established communication connection based on the obtained information; and resumes the previously established communication connection with the communication device using the retrieved context.