Wireless Device Beam Logging for Mobility Management
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Solution Overview
Problem
Current wireless communication networks face challenges in managing mobility efficiently, particularly with the introduction of 5G and massive beamforming, which increases the number of beams to measure, leading to higher energy consumption, latency, and a risk of dropped connections due to the need for extensive radio signal measurements.
Innovation Solution
A method where wireless devices generate and send logs of beam information, including detection times when connected and disconnected, to network nodes, allowing for prediction of future beam detection and optimization of beam selection, reducing the number of necessary measurements and improving connection quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wireless devices perform extensive radio signal measurements to manage mobility in 5G networks with massive beamforming, then beam selection accuracy is improved, but energy consumption increases
Solution Approach 1:
The patent applies preliminary action by having the wireless device log and store beam information during connected states before mobility events occur. The device records beam IDs, reference signal received powers, and timestamps in advance, so that when mobility is needed, the network can retrieve pre-collected data without requiring extensive real-time measurements, thus reducing energy consumption while maintaining beam selection accuracy.
2Reliability
If wireless devices measure a larger number of beams for mobility management, then connection reliability is improved, but latency increases
Solution Approach 1:
The system performs preliminary logging of beam information during connected states, storing beam IDs, signal strengths, and timestamps in advance. When mobility is required, the network retrieves this pre-collected data quickly, avoiding the need for extensive real-time measurements across multiple beams, thereby reducing latency while maintaining connection reliability through accurate beam prediction.
Solution Approach 2:
The patent implements feedback by having the wireless device continuously monitor and log beam measurement results during connected states, then transmit this historical data to the network node. The network uses this feedback information to predict future beam selections and make informed mobility management decisions, ensuring reliable connections without requiring extensive real-time measurements that would increase latency.
3Measurement precision
If wireless devices log beam information during both connected and disconnected states, then mobility prediction accuracy is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by having the wireless device use the same logging mechanism for both connected and disconnected states. The device logs beam information in connected states using standard measurement procedures, and continues logging during disconnected states using simplified procedures, with the same log structure serving both purposes. This multi-functional approach improves mobility prediction accuracy without significantly increasing device complexity, as the logging framework remains consistent across different states.
Data Source
AI summary
Method performed by a wireless device (130) operating in a wireless communications network (100) wherein a plurality of beams (121) is transmitted by one or more network nodes (111, 113, 114) in the wireless communications network (100). The wireless device (130) generates (602) a log over a period of time. The log comprises: a) information about a first set of beams (122) in the plurality of beams (121) detected by the wireless device (130), and b) a time of detection. The log comprises the information and the time of detection for both of: i) a first set of time periods when the wireless device (130) was in a connected state in the wireless communications network (100), and ii) a second set of time periods when the wireless device (130) lacked a connection in the wireless communications network (100). The wireless device (130) sends (605) the generated log to a first network node (111).