User Individual Offset for Adaptive Cellular Handover
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Solution Overview
Problem
Existing cellular networks face challenges in managing mobility due to the inflexibility of cell individual offset (CIO), leading to increased handover failures, which affect user experience quality and signaling load, and existing customization methods lack sufficient flexibility and customization.
Innovation Solution
Introduce a novel handover parameter called User Individual Offset (UIO) that is tailored to each user based on factors like velocity, trajectory, and mobility pattern, providing greater flexibility and precision in handover operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Cell Individual Offset (CIO) is used to manage handovers, then handover decisions can be adjusted, but flexibility and customization for individual users are limited
Solution Approach 1:
The patent segments the handover parameter configuration from cell-level to user-level. Instead of applying a single CIO value to all users in a cell, the system introduces User Individual Offset (UIO) parameters that are specifically configured for each user equipment. This segmentation enables differentiated handover control for different users while maintaining the overall handover management framework.
Solution Approach 2:
The patent implements dynamic handover parameter adjustment by allowing UIO values to be modified in real-time based on user-specific conditions such as mobility patterns, service requirements, and channel conditions. This dynamic approach contrasts with the static CIO configuration and enables adaptive optimization of handover performance for individual users.
2Speed
If CIO values are adjusted to accelerate handover, then handover timing can be optimized, but unintended handovers and ping-pong effects occur
Solution Approach 1:
The patent applies local quality by configuring different UIO values for different users based on their specific characteristics. Instead of using a uniform CIO adjustment that affects all users equally, the system tailors the offset parameter to each user's mobility pattern, service type, and channel conditions. This localized approach ensures that handover timing is optimized for each user without causing unintended handovers or ping-pong effects in other users' connections.
3Productivity
If network densification is implemented to enhance capacity, then mobile data traffic capacity increases, but handover frequency and handover failure probability increase
Solution Approach 1:
The patent changes the handover parameter structure from cell-level CIO to user-level UIO. This parameter change enables more precise control over handover triggering conditions for each user in the densified network. By adjusting UIO values based on user-specific factors, the system can optimize handover timing to reduce handover failures while maintaining the high capacity benefits of network densification.
Data Source
AI summary
Systems and methods for improving cellular handover performance are provided. A user individual offset parameter (UIO) is provided which may modify a measured signal strength parameter for a particular user equipment, improving handover performance. The UIO may be calculated and optimized such that one or more key performance indicators including signal to interference and noise ratio, handover success rate, and signaling overhead are maximized. A base station may compute or retrieve the value of a UIO for a particular user equipment, and adjust a measured signal strength and quality metric using the UIO. The UIO may be calculated either by the user equipment, the base station, or the core network.