Beam Measurement Relaxation for Power-Efficient Wireless Mobility
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Solution Overview
Problem
Future wireless communications networks face challenges in power management due to the use of beam forming, particularly in devices with varying data traffic profiles and types, such as reduced complexity devices and high-resolution displays, which require efficient radio resource management (RRM) measurements without compromising mobility.
Innovation Solution
A method for a communications device to dynamically adjust a delta threshold for RRM measurement states based on the number of detected beams, allowing it to enter a relaxed measurement state when signal strength exceeds a threshold, reducing power consumption while maintaining RRM accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beam forming is used to improve coverage and data rates, then network performance is improved, but power consumption during radio resource management measurements increases
Solution Approach 1:
The patent implements dynamic adjustment of measurement frequency based on beam conditions. The communications device transitions between normal measurement state and relaxed measurement state, dynamically configuring the second delta threshold according to the number of detected beams. When multiple beams are detected, the device enters relaxed state with reduced measurement frequency, thereby reducing power consumption while maintaining network performance.
Solution Approach 2:
The patent changes the measurement parameter (frequency of measurements) based on detected beam conditions. By configuring the second delta threshold dynamically according to the number of detected beams, the system adjusts the strictness of measurement evaluation. This parameter change allows the device to reduce measurement frequency when in relaxed state, directly addressing the power consumption issue while maintaining performance through adaptive parameter adjustment.
2Use of energy by moving object
If measurement frequency is reduced to conserve power, then power consumption decreases, but measurement accuracy may be compromised
Solution Approach 1:
The patent implements a feedback mechanism where the communications device continuously monitors the number of detected beams and adjusts measurement frequency accordingly. The device determines whether to remain in relaxed measurement state by comparing signal strength differences with the dynamically configured second delta threshold. This feedback loop ensures that measurement accuracy is maintained when necessary (when beam conditions warrant it) while allowing power savings when conditions permit relaxed measurements.
Solution Approach 2:
The system dynamically transitions between normal and relaxed measurement states based on real-time beam detection results. The second delta threshold is reconfigured according to the number of detected beams, making the measurement process adaptive rather than static. This dynamic approach ensures measurement accuracy is preserved when beam conditions change, while enabling power consumption reduction during stable relaxed states.
3Use of energy by moving object
If the communications device remains in relaxed measurement state, then power consumption is reduced, but mobility management may be affected
Solution Approach 1:
The patent uses feedback from beam detection to determine whether to maintain relaxed measurement state. The device continuously evaluates whether the difference between reference measurement level and current measurement level exceeds the second delta threshold. This feedback mechanism ensures that mobility management reliability is maintained by exiting relaxed state when beam conditions indicate potential mobility issues, while allowing power savings during stable conditions.
Solution Approach 2:
The communications device autonomously manages its own measurement state without continuous network control. The device self-determines when to enter or exit relaxed measurement state based on its own beam detection results and the dynamically configured second delta threshold. This self-service approach allows the device to balance power consumption and mobility management reliability independently, making decisions based on real-time conditions without constant network intervention.
Data Source
AI summary
A method of operating a communications device for communicating data via a wireless communications network comprises detecting one or more of a plurality of beams of radio signals transmitted by the wireless communications network. The method comprises determining whether a received signal strength of the radio signals of each of the one or more beams exceeds a first evaluation threshold, identifying a sub-set of the set of detected beams of radio signals which can be used to receive data carried by the radio signals of the beam for which the received signal strength exceeds the first evaluation threshold, and entering a relaxed radio measurement state in which the communications device reduces an amount of attempted measurements of the plurality of beams of radio signals compared with a normal state according to one or more relaxed measurement state criteria.