Beam Management in Unlicensed Spectrum for 5G IoT
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Solution Overview
Problem
Next generation cellular systems, such as 3GPP-NR, face challenges in achieving efficient and unified radio resource acquisition and tracking across various use cases like eMBB, URLLC, and mMTC, each with different coverage requirements and frequency bands, due to varying propagation losses.
Innovation Solution
A beam management scheme in the unlicensed spectrum is developed, where user equipment (UE) and base stations exchange configuration information for physical uplink control channel (PUCCH) resources, allowing for the determination and application of transmit and receive beams based on downlink control information (DCI) formats, enabling efficient data forwarding during UE movement between LTE and 5G systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If beamforming and massive MIMO techniques are used to decrease propagation loss and increase transmission distance, then transmission distance and data rates are improved, but device complexity and system configuration complexity increase
Solution Approach 1:
The patent applies preliminary action by configuring PUCCH resource information and beam parameters in advance before actual data transmission. The base station pre-configures multiple PUCCH resources with different beam directions and parameters, allowing the UE to quickly switch beams during movement without complex real-time calculations, thus reducing system configuration complexity while maintaining extended transmission distance
Solution Approach 2:
The patent implements dynamics by enabling dynamic beam switching based on UE movement and channel conditions. The system allows real-time adjustment of transmit and receive beams according to changing propagation conditions, maintaining optimal transmission distance and quality without requiring permanent complex configuration for all possible scenarios
2Adaptability or versatility
If unified radio resource acquisition mechanism is implemented across various use cases and frequency bands, then system adaptability is improved, but difficulty of detecting and measuring synchronization signals increases due to different propagation losses
Solution Approach 1:
The patent applies local quality by configuring PUCCH resources with beam parameters specifically optimized for local propagation conditions. Different PUCCH resources are associated with different beam directions and transmission parameters tailored to specific frequency bands and coverage requirements, enabling the system to adapt to various use cases while maintaining manageable detection complexity through localized optimization
Solution Approach 2:
The patent implements parameter changes by adjusting PUCCH resource parameters such as beam direction, transmission power, and frequency based on propagation loss characteristics. The system dynamically modifies these parameters according to the specific use case and frequency band, achieving unified resource acquisition across diverse scenarios while compensating for different propagation losses through parameter adaptation
3Reliability
If data transmission is maintained during UE movement between LTE and 5G systems, then service continuity is improved, but radio resource management complexity increases
Solution Approach 1:
The patent uses PUCCH resource configuration as an intermediary mechanism to facilitate seamless data transmission during UE movement between LTE and 5G systems. By pre-configuring PUCCH resources that can be used in both systems with appropriate beam parameters, the patent enables smooth handover and maintains service continuity without requiring complex real-time resource negotiation and coordination between different radio access technologies
Data Source
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AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method of a user equipment (UE) in a wireless communication system is provided. Embodiments of the present disclosure provide beam management scheme in the unlicensed spectrum.