Adaptive Directional Beamwidth Control for Moving Multi-Beam Links
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Solution Overview
Problem
Existing multi-beam communication systems, particularly in 5G NR systems using millimeter wave bands, lack the ability to adaptively control the beamwidth of directional beams in response to changes in the communication environment due to device movement, leading to potential interruptions and excessive system load.
Innovation Solution
A device and method that control the beamwidth of directional beams by determining a direction and beamwidth based on kinematic quantity parameters (such as speed and distance traveled) and directional distance parameters (such as actual inter-device distance and inter-device beam centerline distance), allowing for adaptive beamwidth adjustment to maintain communication links and optimize transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed beam codebook with predetermined directional beams is used, then the system structure is simple and easy to implement, but the system cannot adapt to communication environment changes caused by device movement, leading to communication link interruptions
Solution Approach 1:
The patent implements dynamic beamwidth adjustment by introducing a beamwidth control unit that modifies the beamwidth of directional beams based on communication environment parameters such as device movement speed and distance. This transforms the static beam codebook into a dynamic system where beamwidth can be adaptively changed without fundamentally altering the overall system structure, thus improving adaptability while controlling complexity
Solution Approach 2:
The patent changes the beamwidth parameter of directional beams based on communication environment conditions. By adjusting the beamwidth parameter dynamically according to device movement speed and distance, the system adapts to environment changes without requiring a complete redesign of the beam codebook structure, resolving the contradiction between adaptability and system complexity
2Productivity
If the beamwidth is reduced to improve transmission efficiency, then the directional gain increases, but the beam becomes more sensitive to device movement, causing frequent beam switches and excessive system load
Solution Approach 1:
The patent dynamically adjusts beamwidth based on device movement speed. When devices are stationary or moving slowly, the system uses narrow beams for high transmission efficiency. When devices move quickly, the system automatically widens the beams to maintain link stability, thus dynamically balancing transmission efficiency and communication reliability based on actual movement conditions
Solution Approach 2:
The patent introduces a feedback mechanism where the beamwidth control unit receives information about device movement speed and distance, then adjusts beamwidth accordingly. This feedback loop ensures that beamwidth is optimized based on real-time communication environment, preventing excessive beam switching while maintaining transmission efficiency, thus resolving the contradiction between productivity and reliability
3Reliability
If the beamwidth is increased to maintain communication link stability, then the system can tolerate device movement better, but the transmission efficiency and directional gain decrease
Solution Approach 1:
The system dynamically adjusts beamwidth based on device movement conditions. When devices are stationary or moving slowly, narrow beams are used for high transmission efficiency. When devices move quickly, beamwidth is increased to maintain link stability. This dynamic adjustment resolves the contradiction by optimizing beamwidth for each specific operational condition rather than using a fixed width
Solution Approach 2:
The patent changes the beamwidth parameter adaptively based on communication environment parameters such as device movement speed and distance. By modifying this key parameter dynamically, the system achieves both high transmission efficiency when conditions permit and reliable communication when devices move, thus resolving the contradiction between productivity and reliability
4Reliability
If frequent beam switching is performed to track moving devices, then the communication link is maintained, but the system load increases excessively
Solution Approach 1:
The patent implements dynamic beamwidth adjustment that reduces the frequency of beam switching. By widening beams when devices move quickly, the system maintains communication links without requiring frequent beam switches, thus reducing system load while maintaining link continuity, resolving the contradiction between reliability and device complexity
Data Source
AI summary
The directional beamwidth control device includes: an antenna part configured to generate a plurality of directional beams; a transceiver part including at least one transceiver unit (TXRU) configured to supply signal to the antenna part or receive signal from the antenna part; and a control part configured to control the beam generation of the antenna part, and to control TXRU assignment of the transceiver part and signal transmission and reception, wherein the control part controls the antenna part to generate a beam by determining a direction and beamwidth of the beam, and performs control to determine the beamwidth based on a kinematic quantity parameter according to movement of at least one of the reference communication device and other communication device and a directional distance parameter of the reference communication device and the other communication device.