User Terminal Beam Update Notification for 5G Recovery
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Solution Overview
Problem
In future radio communication systems like 5G and NR, beam forming is used to reduce carrier frequency difficulties and radio wave propagation loss, but existing beam recovery methods fail to promptly improve communication quality when transmission/reception beams deteriorate due to factors like UE or base station rotation, or obstructions.
Innovation Solution
A radio communication method where the user terminal autonomously updates its transmission beam and notifies the base station, allowing the base station to change its reception beam accordingly, reducing the need for additional control signals and enabling quick recovery from beam failures without requiring reconnection through random access procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam forming is used to reduce carrier frequency difficulties and radio wave propagation loss, then communication coverage and quality are improved, but the system becomes vulnerable to beam failure due to UE/base station rotation or obstructions
Solution Approach 1:
The base station pre-configures multiple reception beams and maintains beam failure detection mechanisms before actual beam failure occurs. When beam failure is detected through monitoring uplink signals, the base station can quickly switch to alternative reception beams without requiring random access reconnection procedures.
Solution Approach 2:
The system dynamically adapts reception beams based on changing channel conditions. The base station continuously monitors uplink signal quality and adjusts reception beam configurations in real-time to maintain communication quality despite UE or base station rotation, or the appearance of obstructions.
2Reliability
If existing beam recovery methods are used, then beam failure can be detected, but communication quality deterioration is not improved promptly
Solution Approach 1:
The base station pre-configures multiple reception beams and maintains beam failure detection mechanisms before actual beam failure occurs. When beam failure is detected through monitoring uplink signals, the base station can quickly switch to alternative reception beams without requiring random access reconnection procedures.
Solution Approach 2:
The system implements continuous feedback mechanisms where the base station monitors uplink signals to detect beam failure conditions. Based on this feedback, the base station can trigger rapid beam recovery procedures by switching to pre-configured alternative reception beams, significantly reducing recovery time compared to existing methods that require random access reconnection.
3Loss of time
If the user terminal autonomously updates transmission beam and notifies the base station, then recovery time is reduced, but additional control signals are required
Solution Approach 1:
The user terminal autonomously monitors downlink beam quality and performs self-service beam updates by selecting alternative beams when failure is detected. The terminal notifies the base station of beam updates using efficient signaling mechanisms, enabling rapid recovery without requiring extensive base station control or additional overhead compared to network-controlled beam management approaches.
Data Source
Figure 1A~1B
Figure 2
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AI summary
To suppress continuation of deterioration of communication quality due to beam failure, also in the case of using beam forming in both transmission and reception, a user terminal according to one aspect of the present invention is characterized by having a control section that controls a transmission beam, and a transmission section that transmits a signal using the transmission beam, where when the control section updates the transmission beam, the transmission section transmits information about transmission beam update, using an updated transmission beam.