Sidelink Beamforming for 5G UE Path Loss Reduction
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Solution Overview
Problem
Wireless communications systems, particularly in Frequency Range 2 (FR2), face challenges with signal attenuation and path loss, leading to reduced signal range and quality, which affects the reliability and efficiency of sidelink communications between user equipment (UEs) in 5G networks.
Innovation Solution
The implementation of an initial sidelink beamforming procedure that involves transmitting multiple beamforming bursts using different transmit beams and receiving beams to establish reliable communication connections, with the selection of time-frequency resources determined using sidelink resource allocation modes 1 and 2 to avoid interference and optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beamforming is used to focus transmission energy, then signal quality and reliability are improved, but device complexity increases
Solution Approach 1:
The beamforming procedure is divided into multiple phases: initial beam sweeping to establish beam pairs, beam refinement through feedback mechanisms, and beam maintenance. This segmentation allows the complex beamforming process to be managed through structured stages, reducing overall system complexity while maintaining reliability.
Solution Approach 2:
The patent implements feedback mechanisms where the receiving UE provides beam indication information back to the transmitting UE. This feedback loop enables automatic beam pair optimization without requiring complex manual configuration, thereby improving reliability while keeping the system manageable.
2Area of stationary object
If multiple transmit beams are used to cover different directions, then communication coverage is improved, but transmission time increases
Solution Approach 1:
The system performs preliminary beam sweeping to identify and establish optimal beam pairs before actual data transmission begins. This preliminary action allows the transmitting UE to pre-determine the best beams for communication, reducing the time needed during actual data transmission while maintaining comprehensive coverage.
Solution Approach 2:
The beamforming procedure uses periodic beam sweeping and refinement cycles to maintain communication quality. By organizing beam management as periodic actions rather than continuous operations, the system achieves comprehensive coverage while controlling time consumption through scheduled intervals.
3Loss of energy
If beamforming is implemented for FR2 frequencies, then path loss is reduced, but power consumption increases
Solution Approach 1:
The patent dynamically adjusts beamforming parameters such as beam width, beam direction, and transmission power based on channel conditions and feedback information. By optimizing these parameters in real-time, the system reduces path loss effectively while minimizing unnecessary power consumption through adaptive rather than fixed-power transmission.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for wireless communication. An example method includes determining one or more parameters for an initial sidelink beamforming procedure involving one or more transmit beams, each associated with a respective antenna panel of a first UE, and performing the initial sidelink beamforming procedure using the one or more parameters. Performing the initial sidelink beamforming procedure includes transmitting at least a first physical sidelink shared channel (PSSCH) burst, comprising transmitting each PSSCH transmission of one or more PSSCH transmissions using a different respective transmit beam, wherein each PSSCH transmission of the one or more PSSCH transmissions includes respective initial sidelink beamforming information, monitoring, based on the initial sidelink beamforming information, for at least one response message from a second UE responding to at least one of the one or more PSSCH transmissions, and taking one or more actions based on the monitoring.