UE Uplink Beam Selection Based on Service Demand Triggers
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Solution Overview
Problem
In wireless communication systems, particularly at millimeter wave frequencies, thermal noise and UE interference limit the effectiveness of downlink and uplink transmissions, necessitating improved beam selection techniques to enhance communication performance.
Innovation Solution
A UE beam selection mechanism that monitors for triggering events based on service demands, such as target transmit power and data buffer levels, to select beams with higher EIRP capability, facilitating improved uplink transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beamforming is used to improve signal quality, then communication reliability is improved, but device complexity increases due to multiple antenna elements and beam selection mechanisms
Solution Approach 1:
The patent implements dynamic beam selection where the UE monitors triggering events (such as target transmit power changes, data buffer levels, pathloss variations) and switches between beams based on current service demands. This dynamic adaptation allows the system to maintain communication reliability through beamforming while managing complexity by only activating complex beam selection mechanisms when triggering events occur, rather than continuously
Solution Approach 2:
The patent changes the parameter of beam selection criteria from static (always using same beam or UL/DL correspondence) to dynamic based on service demand parameters. The UE evaluates multiple parameters including target transmit power, data buffer level, pathloss, and EIRP capability to determine when to switch beams. This parameter-based dynamic selection improves reliability by adapting to changing conditions while managing complexity through conditional evaluation rather than continuous complex processing
2Productivity
If UE transmits at higher power to overcome interference, then uplink transmission performance is improved, but energy consumption increases
Solution Approach 1:
The patent dynamically adjusts transmit power based on service demand parameters. When triggering events indicate high-priority services (large data buffers, high target transmit power requirements, significant pathloss), the UE increases power accordingly. For normal conditions, the UE maintains lower power levels. This conditional power adjustment improves uplink transmission performance when needed while reducing energy consumption during normal operation
Solution Approach 2:
The system implements dynamic power control that responds to triggering events. Rather than transmitting at constant high power, the UE monitors service demand parameters and adjusts power dynamically. This allows the system to achieve high uplink transmission performance when service demands require it while conserving energy during periods of normal operation, effectively resolving the contradiction between performance and energy consumption
3Productivity
If multiple beams are monitored and selected based on service demands, then uplink throughput is improved, but processing time and complexity increase
Solution Approach 1:
The patent implements event-triggered beam selection where the UE monitors for specific triggering events (target transmit power changes, data buffer thresholds, pathloss variations) rather than continuously evaluating all beams. The triggering event serves as a preliminary indicator that beam selection is needed. This approach improves uplink throughput by ensuring beam selection occurs when service demands change while reducing processing time by avoiding continuous evaluation of all beams
Solution Approach 2:
The system changes from continuous beam monitoring to parameter-based triggering. Specific parameters (target transmit power, data buffer level, pathloss) serve as triggers that initiate beam selection only when they cross certain thresholds. This parameter-based approach improves uplink throughput by responding to actual service demand changes while minimizing processing time by avoiding unnecessary beam evaluations during stable conditions
Data Source
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AI summary
Apparatus, methods, and computer-readable media for facilitating UE beam selection based on service demands are disclosed herein. An example method of wireless communication includes determining to select an UL beam having a higher EIRP capability than an EIRP capability associated with a current beam for transmitting on UL when at least one of a target transmit power based on a TPC exceeds an EIRP capability associated with the current beam or when an amount of data in a buffer of the UE is greater than a data threshold. The example method also includes determining, upon determining to select the UL beam, a set of UL beams with an EIRP capability satisfying an EIRP capability threshold and a respective beamforming direction corresponding to a beamforming direction associated with the current beam, selecting one UL beam of the set of UL beams, and transmitting on UL on the selected UL beam.