Cell Reselection Offset and Hysteresis for Wireless Access Points
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Solution Overview
Problem
Wireless communication systems face challenges in efficiently reselecting access points to ensure continuous and optimal service as mobile devices move, particularly in balancing signal quality, data throughput, and billing preferences, with existing methods lacking in effectively favoring preferred access points for extended coverage and service retention.
Innovation Solution
Mobile devices apply an offset to measurement parameters of preferred access points during cell reselection, and utilize hysteresis values when connected to these points, to enhance their desirability and maintain connectivity for longer durations, thereby favoring preferred access points over others.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If offsets are applied to favor preferred access points during cell reselection, then service retention and connectivity duration are improved, but coverage range is reduced
Solution Approach 1:
The patent applies offset values to measurement parameters of preferred access points, modifying the ranking criteria to favor these points. This parameter change allows the mobile device to maintain connectivity with preferred access points for extended durations even when signal quality would normally warrant reselection to other access points.
2Stability of the object's composition
If hysteresis values are applied to preferred access points, then service consistency is improved, but reselection flexibility is reduced
Solution Approach 1:
The patent applies hysteresis values as a preliminary anti-action to prevent frequent reselection between preferred and non-preferred access points. By adding this stabilizing factor before reselection decisions are made, the system reduces measurement fluctuations and maintains service consistency with preferred access points.
3Adaptability or versatility
If offsets are applied to expand coverage of preferred access points, then service availability is improved, but measurement accuracy is reduced
Solution Approach 1:
The patent introduces offset values as intermediary adjustments to measurement parameters. These offsets act as mediators that expand the effective coverage area of preferred access points by modifying measurement rankings, thereby improving service availability while managing the trade-off with measurement precision.
Data Source
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AI summary
Systems and methodologies are described that facilitate applying offsets and/or selectable hysteresis values to favor access points in cell reselection. In measuring and ranking surrounding access points in reselection, offsets can be applied to favorable access points to facilitate cell reselection thereto. The offset can positively affect measurements, and thus ranking as well, in some cases. Negative offsets can also be applied to lower measurements (and thus ranking) of some access points. Moreover, hysteresis values can be applied in measuring current cells to prevent frequent reselection. The hysteresis values can be selected based on a type of the current cell or related access point to expand the coverage area where desired. Thus, where the current access point is favorable, a larger hysteresis can be added to measurements related to the current access point.