Adaptive Cell Reselection Measurement Rate for Wireless Devices
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Solution Overview
Problem
Current cell reselection techniques in wireless communications face a trade-off between power efficiency and the need for frequent measurements to support mobile devices, particularly in scenarios where devices may move and require improved network connectivity.
Innovation Solution
A method for adapting the rate of neighbor cell measurements based on the signal strength and quality of the serving cell, allowing for more efficient cell reselection by adjusting measurement rates according to predetermined thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rate of neighbour cell measurements is increased to support mobile devices, then network connectivity is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the measurement rate adjustable rather than fixed. The device dynamically adapts the neighbour cell measurement rate based on detected mobility conditions, transitioning between different measurement rates according to whether mobility is detected. This resolves the contradiction by providing high measurement rates when mobility is detected (improving connectivity) and low measurement rates when stationary (reducing power consumption).
Solution Approach 2:
The patent changes the parameter of measurement rate based on detected conditions. When mobility is detected, the device switches to a first (higher) measurement rate; when no mobility is detected, it switches to a second (lower) measurement rate. This parameter adaptation resolves the technical contradiction by matching the measurement rate to the actual mobility state of the device.
2Use of energy by moving object
If the rate of neighbour cell measurements is decreased to improve power efficiency, then power consumption is reduced, but the ability to serve mobile devices deteriorates
Solution Approach 1:
The system dynamically adjusts the measurement rate based on detected mobility conditions. When the device is stationary, it uses a lower measurement rate to conserve power. When mobility is detected, it automatically switches to a higher measurement rate to ensure proper service capability. This dynamic adaptation resolves the contradiction between power efficiency and service capability.
Solution Approach 2:
The measurement rate parameter is changed based on mobility detection results. The device switches between a first measurement rate (when mobility detected) and a second measurement rate (when stationary), ensuring that the parameter adapts to actual operational needs and resolves the contradiction between power consumption and service quality.
3Ease of manufacture
If a common cell reselection solution is provided for both fixed and mobile devices, then manufacturing economies of scale are achieved, but the solution must accommodate conflicting requirements
Solution Approach 1:
The patent implements a universal cell reselection solution that works for both fixed and mobile devices through a single device architecture. The device includes a mobility detection mechanism that automatically determines whether it is stationary or mobile and adjusts measurement rates accordingly. This multi-functional approach allows the same hardware to serve both fixed and mobile applications, achieving manufacturing economies of scale while adapting to different device types through software-controlled parameter adjustment.
Solution Approach 2:
The solution uses dynamic adaptation to accommodate both fixed and mobile devices with a common architecture. The device detects its mobility state and dynamically adjusts the neighbour cell measurement rate, allowing the same physical device to operate efficiently in both fixed (lower rate) and mobile (higher rate) scenarios, thus achieving universality without sacrificing adaptability.
Data Source
AI summary
A method of performing cell reselection by a wireless communications device comprises measuring a signal strength of radio signals received from a serving cell, determining whether the signal strength of the signals received from the serving cell is lower than a first predetermined signal strength threshold, if the signal strength is lower than the first predetermined signal strength threshold measuring a signal strength of a neighbor cell operating on the same frequency as the serving cell to generate signal strength measurements at a first rate, and in accordance with the signal strength measurements of the neighbor cell generated at the first rate determining whether to reselect to the neighbor cell.