Terminal Beam Tracking via Dual Report Information
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Solution Overview
Problem
Current beam tracking techniques in 5G communication systems, such as those using MIMO, face challenges in maintaining continuity and accuracy, particularly for high-speed user equipment (UE) movement, due to the high overhead of reference signals and difficulty in dynamically adjusting beam settings.
Innovation Solution
A terminal apparatus and base station system that reports first and second report information for downlink user data and beam tracking, allowing the base station to adjust transmission settings and improve beam tracking accuracy by considering interference and reception power, and utilizing multiple beam paths to enhance resistance to blocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If beam tracking is performed continuously to maintain accuracy for high-speed user equipment, then beam tracking accuracy is improved, but communication overhead increases due to frequent reference signal transmissions
Solution Approach 1:
The patent implements periodic beam tracking using downlink reference signals transmitted at regular intervals rather than continuously. The terminal apparatus measures reception power of these periodic reference signals and reports beam tracking information only when necessary, reducing overhead while maintaining tracking accuracy for high-speed user equipment
Solution Approach 2:
The terminal apparatus autonomously determines whether beam tracking is needed by comparing reception power measurements against thresholds and selecting appropriate beams based on its own measurements, rather than requiring continuous network-controlled tracking adjustments
2Reliability
If multiple downlink reference signals are transmitted using different beams to improve tracking reliability, then beam tracking reliability is improved, but device complexity increases at the base station
Solution Approach 1:
The patent divides the beam tracking process into separate downlink reference signal transmissions, each using a different beam direction. The terminal apparatus measures each segmented reference signal independently and selects the best beam, allowing the base station to manage multiple beams through structured, modular signal transmission rather than complex coordinated control
Solution Approach 2:
The terminal apparatus provides feedback information about reception power measurements and beam selection to the base station. This feedback mechanism allows the base station to adjust beam settings based on actual terminal measurements, improving reliability through adaptive control without requiring complex real-time coordination
3Stability of the object's composition
If beam settings are dynamically adjusted to follow high-speed user equipment movement, then beam tracking continuity is improved, but difficulty in detecting and measuring increases
Solution Approach 1:
The base station transmits downlink reference signals using multiple different beam directions in advance before the terminal needs to select a beam. The terminal apparatus measures these pre-transmitted reference signals and determines the appropriate beam based on reception power, enabling continuous tracking without requiring complex real-time measurement and adjustment
Data Source
AI summary
[Object] To provide a mechanism that can improve the continuity of beam tracking.[Solution] A terminal apparatus, including: a communication unit configured to perform communication with a base station configured to form a plurality of beams and perform communication; and a control unit configured to report first report information for downlink user data related to reception results of a group of downlink reference signals including a plurality of downlink reference signals transmitted from the base station using the beams and second report information for beam tracking intended for the terminal apparatus by the base station to the base station.