Antenna Panel Mode Switching for 5G UE Latency Reduction
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing antenna panel switching in user equipment (UE) for 5G networks, leading to increased latency and delays due to panel activation times, which affect data transmission and reception performance, especially in scenarios requiring ultra-reliable and low-latency communications.
Innovation Solution
The implementation of two operational modes in user equipment (UE) and base stations, where UE sends timing information for beam switch and report timings, allowing the base station to select the appropriate mode, thereby optimizing antenna panel usage and reducing latency by either avoiding or accounting for panel activation delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If antenna panel switching is performed to improve CSI acquisition accuracy, then measurement precision is improved, but latency increases due to panel activation time
Solution Approach 1:
The system dynamically switches between two operational modes based on timing conditions: Mode 1 where the UE does not switch antenna panels, and Mode 2 where the UE performs antenna panel switching. This dynamic adaptation allows the system to optimize between measurement precision and latency by selecting the appropriate mode based on current scheduling requirements and timing information.
Solution Approach 2:
The invention introduces mode-specific scheduling offsets as a parameter change mechanism. By adjusting the scheduling offset based on the operational mode (with or without panel switching), the system accounts for panel activation delays in Mode 2 while maintaining tight scheduling in Mode 1, thereby resolving the contradiction between achieving accurate CSI measurements and minimizing latency.
2Productivity
If mode-specific scheduling offsets are implemented to reduce latency, then productivity is improved, but device complexity increases
Solution Approach 1:
The system implements feedback mechanisms where the UE sends timing information including beam switch timing and beam report timing to the base station. The base station uses this feedback to determine the appropriate operational mode and scheduling offset, creating a closed-loop control system that manages complexity through intelligent decision-making based on real-time conditions rather than fixed complex configurations.
Data Source
AI summary
A method may include sending, by a user equipment that includes a plurality of antenna panels, to a base station, timing information including at least one of a beam switch timing or a beam report timing, wherein the timing information includes timing information provided for at least one of a first mode of operation or a second mode of operation, wherein the first mode of operation comprising the user equipment not performing switching between an active antenna panel and an inactive antenna panel, and the second mode of operation comprising the user equipment performing switching between an active antenna panel and an inactive panel; and receiving, by the user equipment, at least one downlink control information indicating a mode of operation for the user equipment, wherein the indicated mode of operation is at least one of the first mode of operation or the second mode of operation.