Base Station State Propagation for Seamless High-Mobility Handovers
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Solution Overview
Problem
Current 4G LTE and proposed 5G mobile communication systems are not well-suited for high-mobility applications due to latency issues in handover processes, which can render fast-moving devices connectionless during handovers, especially in scenarios like Connected Vehicle Technology and high-speed railways.
Innovation Solution
Implementing a method to share the state of active connections among base station nodes within a tracking area, allowing seamless handovers with minimal latency by propagating the UE state through collaborating base stations, thereby reducing the need for complex handover schemes and procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional handover schemes are used in 4G LTE and 5G networks, then mobility management can be performed with existing infrastructure, but handover latency increases causing connection loss for fast-moving devices
Solution Approach 1:
The patent pre-establishes connectivity relationships between a mobile device and multiple base station nodes before handover is needed. By maintaining pre-configured connection parameters and authentication states with potential target base stations in advance, the system eliminates the need for time-consuming handover procedures when the device moves, thus reducing handover latency while maintaining connection continuity
Solution Approach 2:
The patent implements dynamic connection management where the mobile device can rapidly switch between pre-configured base station nodes based on real-time signal conditions and mobility state. This dynamic approach allows the system to adapt connection parameters on-the-fly without triggering traditional handover procedures, thereby reducing latency for fast-moving devices while maintaining reliable connectivity
2Ease of operation
If traditional mobility management procedures are implemented, then core network control can be maintained, but the complexity of handover procedures increases causing delays in high-mobility scenarios
Solution Approach 1:
The patent extracts and removes complex core network involvement from the handover process by enabling direct peer-to-peer connectivity management between mobile devices and base station nodes. By taking out the centralized handover control from the core network and implementing distributed connection management at the edge, the system simplifies procedures and reduces execution time while maintaining operational ease
Solution Approach 2:
The patent enables mobile devices to autonomously manage their own connections by selecting and switching between pre-configured base station nodes without requiring complex core network-mediated handover procedures. This self-service approach allows devices to independently handle connectivity transitions, significantly reducing procedure complexity and execution time for high-mobility applications
Data Source
AI summary
Systems and methods are provided for sharing context of a mobile device among base station nodes for mobility management in mobile communications networks. An active connection is established between a first base station node and a mobile device, within radio access network of a mobile communications network. Other base station nodes in the radio access network within a tracking area of the mobile device are identified, and a state propagation process is performed to share a state of the active connection between the first base station node and the mobile device with at least a second base station node determined to be within the tracking area of the mobile device. The shared state is utilized to enable the mobile device to seamlessly establish an active connection with the second base station node and communicate with the mobile communications network through the active connection with the second base station node.