IoT Connection Resumption via Context Retrieval
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Solution Overview
Problem
Current solutions for IoT devices under 3GPP standards face challenges in resuming connections during mobile terminated calls when devices move to new base stations, leading to potential loss of connectivity and increased signaling overhead, which compromises energy efficiency and resource utilization.
Innovation Solution
Implementing a system where IoT devices send a resume identifier and current location to the core network, allowing the base station to retrieve and set up necessary radio bearers efficiently, even when the device has moved to a new cell, thereby maintaining connectivity and optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If IoT devices use existing connection resumption mechanisms, then connection speed is improved, but signaling overhead increases and energy efficiency deteriorates
Solution Approach 1:
The patent extracts the essential resumption identifier from the full connection context and uses it as a key to retrieve only the necessary bearer information from the base station. This selective extraction avoids the need to re-establish all bearers, reducing signaling overhead while maintaining fast connection resumption and improving energy efficiency.
Solution Approach 2:
The base station preliminarily stores the resumption identifier and bearer context information before the connection is suspended. When resumption is needed, this pre-stored information is quickly retrieved and reused, eliminating the need for full connection re-establishment and reducing both signaling overhead and energy consumption.
2Adaptability or versatility
If devices move to new base stations during calls, then mobility flexibility is improved, but connectivity reliability deteriorates
Solution Approach 1:
The core network node receives location information from the IoT device and uses it to identify the current serving base station. This feedback mechanism allows the system to update the association between the resumption identifier and the current base station, ensuring that connectivity is maintained even when the device moves to a new location.
Solution Approach 2:
The core network node acts as an intermediary that coordinates between the IoT device and the base station during mobility events. It manages the resumption identifier and triggers appropriate actions (such as fetching bearer context) to maintain connectivity reliability while allowing the device to move freely between base stations.
3Stability of the object's composition
If all bearers are resumed during connection resumption, then service continuity is improved, but resource utilization deteriorates
Solution Approach 1:
Instead of resuming all bearers unconditionally, the system performs partial resumption by retrieving only the necessary bearer context information using the resumption identifier. The base station then determines which bearers actually need to be re-established based on current network conditions and device requirements, avoiding unnecessary resource consumption while maintaining essential service continuity.
Data Source
AI summary
A system is disclosed in which a base station receives, from a core network node (e.g. a mobility management entity), a resume identifier associated with a communication device located within a cell of the base station. The base station retrieves, based on the received resume identifier, a user equipment (UE) context associated with the communication device, for use in resumption of a suspended communication connection (e.g. a radio resource control connection) by the communication device.