Zero-Power Mobility Management Using Harvesting-Aware Cell Selection
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Solution Overview
Problem
Zero power devices face challenges in mobility management due to limited power harvesting and simple receiver modules, which hinder accurate measurement of reference signals, leading to inefficiencies in cell reselection and handover processes.
Innovation Solution
Implement mobility management based on first information, including reference signal measurement results, decoding results of target messages, and power harvesting information, to facilitate serving device selection, reselection, or handover, particularly for zero power or wake-up receiver devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If zero power devices use simple receiver modules to reduce device complexity and power consumption, then device complexity and power consumption are reduced, but measurement precision of reference signals deteriorates
Solution Approach 1:
The patent combines multiple measurement results (reference signal measurement results from simple receiver modules and decoding results from target messages) to form a comprehensive mobility management decision basis. This merging approach allows the system to compensate for the limited measurement capability of simple receiver modules by integrating additional information sources, thereby maintaining measurement precision while keeping device complexity low.
Solution Approach 2:
The patent introduces an intermediary processing mechanism that collects and processes multiple types of information (reference signal measurements, decoding results, power harvesting information) to support mobility management decisions. This intermediary layer compensates for the limitations of simple receiver modules by aggregating and analyzing multiple data sources, thus improving effective measurement precision without increasing the complexity of the receiver module itself.
2Use of energy by moving object
If zero power devices harvest limited power to maintain operation, then device operation is sustained, but mobility management accuracy deteriorates due to insufficient power for accurate measurements
Solution Approach 1:
The patent applies partial action by using multiple information sources (reference signal measurements, decoding results, power harvesting information) rather than relying solely on reference signal measurements. This partial approach compensates for the insufficient power available for accurate reference signal measurements by incorporating alternative information sources that require less power to process, thereby maintaining mobility management accuracy under power constraints.
Solution Approach 2:
The patent changes the parameters used for mobility management decisions from relying primarily on reference signal measurement results to incorporating multiple parameters including decoding results of target messages and power harvesting information. This parameter change allows the system to adapt to limited power availability by using information sources that can be processed with lower power consumption while maintaining decision accuracy.
3Adaptability or versatility
If mobility management uses multiple information sources including decoding results and power harvesting information, then mobility management flexibility and accuracy are improved, but device complexity increases
Solution Approach 1:
The patent implements multi-functionality by using a unified mobility management mechanism that processes multiple types of information (reference signal measurements, decoding results, power harvesting information) through the same decision-making framework. This universal approach allows the system to adapt to different information sources and conditions without requiring separate processing paths for each type of information, thereby improving flexibility while controlling device complexity through standardized processing procedures.
Data Source
AI summary
A method for wireless communication includes: performing, by a first communication device, mobility management based on first information, the first communication device being a zero power device or an ambient device, or the first communication device being a device with a wake up receiver; the mobility management including at least one of: serving device selection, serving device reselection, or serving device handover; where the first information is at least one of: a reference signal measurement result of a serving device and/or a reference signal measurement result of a candidate device, a decoding result of a target message, a decoding result of a target channel, or power harvesting information of the first communication device.