User Equipment Handover via Radio Link Failure Declaration
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Solution Overview
Problem
Wireless devices face challenges in maintaining connectivity as they move between different base station coverage areas, leading to potential drops in communication due to inadequate handover mechanisms, especially for devices with limited communication resources like narrowband UEs.
Innovation Solution
A wireless device, such as a user equipment (UE), autonomously determines signal metrics between itself and multiple base stations, declaring a radio link failure with the current base station if a stronger signal metric is detected from another base station, allowing it to initiate a handover to the stronger base station, even if channel conditions with the current base station are adequate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE autonomously initiates handover based on signal metric comparison, then connectivity reliability is improved, but device complexity increases
Solution Approach 1:
The UE autonomously performs handover initiation by comparing signal metrics and declaring radio link failure without requiring network control, enabling the device to self-manage connectivity transitions and improve reliability independently
Solution Approach 2:
The UE proactively declares radio link failure and initiates handover before actual connection degradation occurs by comparing signal metrics in advance, preventing connectivity drops rather than reacting to failures
2Speed
If the UE proactively declares radio link failure to initiate handover, then handover speed is improved, but loss of time occurs due to connection interruption
Solution Approach 1:
The UE compares signal metrics and declares radio link failure in advance before actual connection degradation, enabling proactive handover initiation that speeds up the transition process while minimizing disruption
Solution Approach 2:
The radio link failure declaration serves as an intermediary mechanism that triggers the handover process, allowing seamless transition between base stations by using the failure declaration as a bridge state rather than a complete connection break
Data Source
AI summary
Aspects of the present disclosure provide techniques and apparatus for user equipment initiated handover. Certain aspects include a method for wireless communications by a user equipment (UE) including determining a first signal metric between the UE and a first base station, while the UE has a connection established with the first base station. The method further includes determining a second signal metric between the UE and a second base station, while the UE does not have a connection established with the second base station. The method further includes determining that the second signal metric is stronger than the first signal metric. The method further includes declaring a radio link failure with the first base station based on determining that the second signal metric is stronger than the first signal metric. The method further includes establishing a connection with the second base station.