Beam-Specific Uplink Power Control in Multi-Beam Networks
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Solution Overview
Problem
Uplink power control in wireless communications networks utilizing multiple beams is complicated due to the complexity of managing beam patterns and interference, especially in multi-beam scenarios.
Innovation Solution
A method and apparatus for transmit power control in wireless communication systems, involving remote and network units, that utilize reference signal resources and antenna array properties to determine optimal beam patterns and power levels for uplink transmissions, incorporating closed-loop power control processes and power control parameters to manage interference effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple beams are used for communication in uplink, then communication coverage and capacity are improved, but power control complexity increases
Solution Approach 1:
The patent segments the power control process into distinct phases: determining beam patterns for multiple uplink transmissions, selecting reference signal resources associated with each beam pattern, measuring reference signals, calculating pathloss values for each beam, and determining transmit power based on beam-specific parameters. This segmentation allows complex multi-beam power control to be managed through systematic, step-by-step procedures.
Solution Approach 2:
The patent performs preliminary actions by pre-determining beam patterns and selecting reference signal resources before actual uplink transmissions occur. The remote unit prepares beam patterns for multiple uplink transmissions and associates reference signal resources with each beam pattern in advance, enabling efficient power control during actual transmissions without real-time computation delays.
2Reliability
If beam patterns are optimized for uplink transmissions, then communication quality is improved, but interference management becomes more difficult
Solution Approach 1:
The patent implements feedback mechanisms where the remote unit measures reference signals transmitted through different beam patterns, calculates pathloss values based on these measurements, and uses this feedback information to determine optimal transmit power for each beam. The network entity receives uplink transmissions and can provide further feedback for power adjustment, creating a closed-loop system that manages interference while maintaining communication quality.
Solution Approach 2:
The patent applies local quality by determining beam-specific parameters for each uplink transmission, including beam-specific beam patterns, beam-specific reference signal resources, and beam-specific pathloss values. Each beam is optimized independently with its own power control parameters, allowing precise control of communication quality and interference management for each spatial direction rather than using uniform parameters across all beams.
Data Source
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AI summary
Apparatuses, methods, and systems are disclosed for uplink power control. One method (600) includes: receiving (602) a message that configures a set of resources that each includes a downlink resource or an uplink sounding resource and is associated with an uplink transmission beam pattern; receiving (604) scheduling information for an uplink transmission that is associated with a resource of the set of resources; determining (606) an uplink transmission beam pattern associated with the resource; determining (608) a configured maximum output power for the uplink transmission beam pattern that is based on an antenna array property associated with the uplink transmission beam pattern; determining (610) a transmit power for the uplink transmission based on the configured maximum output power; and performing (612) the uplink transmission using the uplink transmission beam pattern based on the transmit power.