Unlicensed Uplink Detection Beam Selection for Directional LBT
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Solution Overview
Problem
The challenge in determining a detection beam for unlicensed uplink channels, particularly in directional LBT, is unresolved, leading to inefficiencies in channel access on unlicensed spectrum.
Innovation Solution
A method for determining a detection beam for unlicensed uplink channels involves receiving beam configuration information from a network device, which enables the user equipment to determine a transmission beam and subsequently a detection beam for performing LBT, thereby optimizing channel access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the network device provides explicit detection beam indication, then the LBT detection accuracy is improved, but the signaling overhead and system complexity increase
Solution Approach 1:
The UE autonomously determines the detection beam by deriving it from the transmission beam configuration information that it already has. Instead of requiring explicit detection beam indications from the network device, the UE uses its own transmission beam settings to self-determine the appropriate detection beam, thereby reducing signaling overhead while maintaining detection accuracy.
Solution Approach 2:
The transmission beam configuration information serves dual purposes: it configures the UE for data transmission and simultaneously enables the UE to determine the detection beam for LBT. This multi-functional use of the configuration information eliminates the need for separate detection beam signaling, reducing system complexity while maintaining precision.
2Measurement precision
If additional beam configuration signaling is sent from network device to UE, then the detection beam determination accuracy is improved, but the transmission resources are consumed
Solution Approach 1:
The UE uses its own transmission beam configuration information to self-determine the detection beam, eliminating the need for the network device to send additional beam configuration signaling. This self-service approach maintains accurate detection beam determination while conserving transmission resources that would otherwise be consumed by extra signaling messages.
Solution Approach 2:
The patent effectively discards the need for separate detection beam configuration signaling by recovering the necessary information from the existing transmission beam configuration. The UE reuses the transmission beam settings to determine the detection beam, thereby eliminating redundant signaling and conserving transmission resources.
Data Source
AI summary
A method for determining a detection beam for an unlicensed uplink channel is performed by a user equipment. The method includes: receiving beam configuration information from a network device, wherein the beam configuration information is configured to indicate a transmission beam for sending the unlicensed uplink channel; and determining, based on the beam configuration information, a detection beam for performing a listen before talk (LBT) detection on the unlicensed uplink channel.