UE Antenna Panel Selection for Beam Switching Latency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly in LTE and transitioning to 5G, face challenges in efficiently managing uplink antenna panel selection for user equipment (UE) to optimize beam quality and reduce latency, which affects communication performance and power consumption.
Innovation Solution
A method where the UE determines conditions for beam switching based on quality metrics and reports latency to the base station, allowing for targeted antenna panel selection and switching within specified latency periods, enabling flexible and efficient antenna panel management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE switches antenna panels to improve beam quality, then communication performance is improved, but switching latency increases
Solution Approach 1:
The UE performs measurements and evaluations of target antenna panels in advance, maintaining a ready list of candidate panels with pre-assessed beam qualities. When beam switching is needed, the UE can immediately transition to a pre-evaluated panel, significantly reducing the switching latency while ensuring high beam quality.
Solution Approach 2:
The system dynamically adjusts beam switching decisions based on real-time channel conditions, traffic requirements, and measured beam qualities. The UE continuously monitors downlink reference signals and adapts its antenna panel selection to current conditions, optimizing the trade-off between beam quality and switching latency dynamically.
2Reliability
If the UE activates multiple antenna panels to improve communication performance, then beam quality is improved, but power consumption increases
Solution Approach 1:
The UE activates antenna panels selectively based on spatial direction and service requirements. Instead of uniformly activating all panels, the system activates only the specific panels needed for current communication tasks, optimizing power consumption while maintaining necessary communication performance in different spatial directions.
Solution Approach 2:
The UE activates a subset of antenna panels rather than all available panels, using only the minimum number required to achieve the desired communication performance. This partial activation approach reduces power consumption while still meeting quality requirements by activating only sufficiently many panels.
3Reliability
If the UE performs frequent beam switching to optimize communication, then beam quality is improved, but system complexity increases
Solution Approach 1:
The UE implements a feedback mechanism where measurement results of candidate antenna panels are reported to the network, and switching decisions are made based on this feedback. The network can provide recommendations or commands for beam switching, distributing the decision-making complexity between UE and network rather than concentrating it entirely in the UE.
Solution Approach 2:
The UE autonomously performs beam switching based on its own measurements and evaluations of antenna panel qualities. By self-managing the beam switching process using pre-configured parameters and local measurements, the UE reduces the need for complex network-controlled switching procedures, simplifying overall system management.
Data Source
AI summary
Apparatuses, systems, and methods for user equipment device (UE) uplink antenna panel selection. The UE may determine, based on at least one condition, to perform a beam switch from a current beam being used for communications with a base station. The UE may transmit, to the base station, an indication of an antenna panel status that may include an indication of a latency associated with the beam switch. The UE may receive, from the base station, an indication to switch to a target beam and to perform the switch, based on the indication, to the target beam. The indication of the antenna panel status may include a beam switching latency level for each beam in a beam report, a beam switch request that may indicate the target beam, and/or a beam switch request that may indicate that an antenna panel switch is to be applied by the UE.