Uplink Power Allocation via SRS-Based Headroom Selection
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Solution Overview
Problem
In certain wireless communications networks, uplink transmission power is limited, and there is a need to effectively manage and allocate power among multiple carriers to ensure compliance with maximum output power constraints.
Innovation Solution
A method and apparatus for uplink transmission power allocation that involves determining whether a power headroom report for a serving cell is based on an actual or reference sounding reference signal transmission, and selecting an uplink carrier for power headroom computation based on configuration parameters, allowing for prioritization and computation of power headroom reports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink transmission power is limited to comply with maximum output power constraints, then power allocation compliance is improved, but transmission performance may deteriorate
Solution Approach 1:
The patent implements dynamic power allocation by determining whether to use actual or reference sounding reference signal transmissions based on configuration parameters. The system dynamically selects between actual SRS transmissions (when configuration parameters indicate) or reference SRS transmissions (when configuration parameters are not configured), allowing flexible power management that adapts to different operational conditions while maintaining compliance with maximum output power constraints.
Solution Approach 2:
The patent changes the parameter of power headroom report computation by selecting different uplink carriers for computation based on configuration parameters. When configuration parameters are not configured, the system uses reference SRS transmissions; when configured, it uses actual SRS transmissions. This parameter change enables the system to optimize power allocation while maintaining compliance.
2Productivity
If power headroom report computation is performed on multiple uplink carriers, then power allocation efficiency is improved, but system complexity increases
Solution Approach 1:
The patent segments the power headroom report computation by selecting specific uplink carriers for computation based on configuration parameters. Instead of uniformly computing power headroom across all carriers, the system segments the computation to specific carriers (first uplink carrier or second uplink carrier) depending on whether configuration parameters are set, thereby improving efficiency while managing complexity.
Solution Approach 2:
The patent applies local quality by treating different uplink carriers differently based on their configuration parameters. When configuration parameters are configured for a specific carrier, the system uses actual SRS transmissions for that carrier; when not configured, it uses reference SRS transmissions. This localized differentiation optimizes power allocation efficiency for each carrier based on its specific configuration status.
Data Source
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AI summary
Apparatuses, methods, and systems are disclosed for uplink transmission power allocation. One method (1000) includes receiving (1002) a configuration of two uplink carriers. The method (1000) includes determining (1004) whether a configuration parameter corresponding to at least one of a first uplink carrier and a second uplink carrier for a serving cell is configured. The method (1000) includes determining (1006) whether a power headroom report is based on an actual sounding reference signal ("SRS") transmission or a reference SRS transmission. The method (1000) includes, in response to determining that the power headroom report is based on a reference SRS transmission, selecting (1008) an uplink carrier for power headroom computation from the two uplink carriers based on whether the configuration parameter for the two uplink carriers. The method (1000) includes computing (1010) the power headroom report for the serving cell based on a reference SRS transmission on the uplink carrier.