UE Beamforming Adaptation for 5G Connectivity
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Solution Overview
Problem
5G wireless communication systems face challenges in maintaining reliable connectivity and coverage due to increased path loss at higher frequencies, requiring more complex and costly antenna arrays to form high gain beams, which limits the number of concurrent beams that can be formed, and are sensitive to time and space variations, leading to quicker degradation of signal quality.
Innovation Solution
The implementation of UE beamforming, which allows user equipment to adapt and change beams dynamically, combined with network-controlled beam management, to maintain connectivity and coverage by generating multiple beams and adjusting them in real-time, reducing the need for frequent handovers and improving signal reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If higher frequencies are used to increase network capacity and speed, then data transmission rate is improved, but path loss increases reducing coverage and reliability
Solution Approach 1:
The patent implements dynamic beam management where the network controls UE beamforming based on real-time channel conditions. The UE adapts its transmit beams dynamically according to network instructions, allowing the system to optimize for both high data rates and reliable connectivity by adjusting beam directions and parameters based on current signal quality and mobility state
Solution Approach 2:
The system changes beamforming parameters (beam direction, gain, width) based on UE mobility state and channel conditions. When UE is stationary or moving slowly, narrower high-gain beams are used for maximum data rate. When UE mobility increases, the system adjusts beam parameters to maintain reliability, resolving the contradiction between speed and reliability
2Strength
If high gain beams are formed to compensate for path loss, then signal strength is improved, but the number of concurrent beams is limited increasing device complexity
Solution Approach 1:
The patent segments the beam management function between network and UE. The network performs beam selection and control, while the UE executes beamforming based on network instructions. This segmentation allows the use of high gain beams without requiring the UE to independently manage complex beamforming algorithms, reducing UE device complexity while maintaining signal strength
Solution Approach 2:
The network performs beam management self-service by autonomously selecting and instructing UEs on which beams to use. This eliminates the need for complex UE-side beam management algorithms and reduces overhead, allowing high gain beams to be used effectively without increasing overall system complexity
3Area of stationary object
If narrow high gain beams are used to extend coverage, then signal reach is improved, but the system becomes more sensitive to time and space variations causing quicker signal degradation
Solution Approach 1:
The patent implements dynamic beam adaptation where the system transitions from static narrow beams to dynamic beams that adjust to UE mobility. The network monitors channel conditions and instructs UEs to adjust beam parameters in real-time, allowing the system to maintain coverage area while compensating for signal degradation due to mobility through continuous adaptation
Solution Approach 2:
The system uses feedback mechanisms where the network receives channel quality reports from UEs and adjusts beamforming parameters accordingly. This feedback loop allows the system to detect signal quality degradation early and adjust beams to maintain stability, resolving the contradiction between coverage extension and signal stability
4Reliability
If frequent handovers are performed to maintain connectivity in mobile scenarios, then connection reliability is improved, but network overhead and latency increase
Solution Approach 1:
The patent implements preliminary beam alignment where the network prepares beam configurations in advance based on predicted UE movement patterns. By pre-configuring beams along expected UE trajectories, the system reduces the need for frequent handovers and minimizes handover latency while maintaining connection reliability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the reliability and coverage of 5G networks by allowing for more efficient beam management, reducing interference, and maintaining signal quality across a wider area with fewer handovers, thereby improving user experience and network efficiency.
Implementation Method 1
the UE device performs UE beam sweeping for transmission or reception, e.g., to detect a specific UE beam
Implementation Method 2
transmitting or receiving a common signal, e.g., a synchronization signal, a reference signal, a discovery signal, or a physical downlink control channel signal
Data Source
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AI summary
A method for a wireless communications system is disclosed. In one example, a user equipment (UE) (e.g. a mobile phone), receives an indication from a network about one or more UE beams that the UE can use for transmission or reception. The UE uses the one or more UE beams for transmission or reception. If and when a certain condition is fulfilled, for example, there is a beam tracking failure, the UE transmits or receives a specific signal via a specific UE beam. The specific UE beam is different from the one or more UE beams that were indicated by the network, and is selected by the UE.