Per-Beam LBT for Unlicensed Band Signal Transmission
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving signals in unlicensed bands, particularly in managing interference and optimizing beam usage for enhanced mobile broadband, ultra-reliability and low-latency communication, and massive machine-type communication scenarios.
Innovation Solution
The proposed method involves performing listen-before-talk (LBT) for multiple beams in unlicensed bands, using independent per-beam LBT for multibeam transmission, and configuring energy detection thresholds based on transmission types to minimize interference and optimize channel access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If independent per-beam LBT is performed for multiple beams in unlicensed bands, then interference is reduced and beam usage is optimized, but device complexity and processing overhead increase
Solution Approach 1:
The LBT procedure is segmented and applied independently to each beam rather than treating all beams as a single unit. This allows each beam to perform its own channel sensing and access determination, reducing interference between beams and optimizing channel utilization for each directional transmission path.
Solution Approach 2:
The system dynamically selects which beams to activate based on real-time channel conditions detected through independent LBT sensing. Beams can be dynamically enabled or disabled depending on whether their respective channel access is successful, allowing adaptive optimization of beam usage without fixed predetermined configurations.
2Object-affected harmful factors
If energy detection thresholds are configured based on transmission types, then interference management is optimized, but configuration complexity increases
Solution Approach 1:
Different energy detection thresholds are configured for different transmission types (e.g., URLLC, eMBB, mMTC) based on their specific requirements. Each transmission type receives a customized threshold level that is locally optimized for its interference tolerance and service requirements, rather than using a single universal threshold.
Solution Approach 2:
The energy detection threshold parameter is changed and adjusted according to the transmission type being performed. The system modifies this critical parameter dynamically based on whether the transmission is for ultra-reliable low-latency communication, enhanced mobile broadband, or massive machine-type communication, optimizing interference management for each scenario.
Data Source
AI summary
Disclosed is a method of performing an uplink (UL) transmission by a user equipment (UE) in a wireless communication system. Specifically, the method comprises performing sensing on a plurality of beams, wherein each of the plurality of beams is sensed independently; performing the UL transmission through at least one beam sensed to be idle among the plurality of beams, wherein counter values for the each of the plurality of beams are set independently.