Uplink Power Allocation for Multi-Cell PUCCH and PUSCH Transmission
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Solution Overview
Problem
Current mobile communication systems face challenges in controlling uplink transmission power when user equipment transmits to multiple cells and base stations, particularly when transmitting Physical Uplink Control Channels (PUCCH) and Physical Uplink Shared Channels (PUSCH) simultaneously across different serving cells.
Innovation Solution
A method and apparatus for controlling uplink transmission power by allocating power to PUCCH and/or PUSCH across multiple cells and transmitting them to one or more base stations, with the base station providing Radio Resource Control (RRC) configuration parameters to indicate simultaneous Uplink Control Information (UCI) transmission, allowing for controlled power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink transmission power is allocated to multiple cells simultaneously, then data transmission capacity is improved, but power management complexity increases
Solution Approach 1:
The patent segments uplink power management by introducing separate power control mechanisms for different cell types (serving cells and non-serving cells). The base station configures different power allocation rules, maximum power limits, and transmission conditions for each cell category, thereby simplifying the overall power management while enabling multi-cell transmission.
Solution Approach 2:
The patent implements dynamic power allocation where the user equipment adjusts transmission power based on real-time conditions including cell type, uplink grant reception status, and configured maximum powers. The base station dynamically configures power parameters through RRC signaling and adjusts power distribution according to traffic requirements and channel conditions.
2Reliability
If transmission power is increased for simultaneous PUCCH and PUSCH transmission, then communication reliability is improved, but power overload risk increases
Solution Approach 1:
The patent applies different power allocation strategies and maximum power limits to different cell types (serving vs. non-serving cells). For serving cells, the UE ensures reliable PUCCH transmission with appropriate power prioritization, while for non-serving cells, power is allocated based on uplink grants and configured limits, preventing any single cell from causing power overload.
Solution Approach 2:
The patent changes power parameters dynamically based on transmission conditions. The base station configures cell-specific maximum powers, power offsets, and allocation ratios through RRC parameters. The UE adjusts actual transmission power based on these parameters, total available power, and priority rules, thereby maintaining reliability while avoiding overload.
3Reliability
If power allocation prioritizes PUCCH transmission, then control information reliability is improved, but data transmission efficiency decreases
Solution Approach 1:
The patent segments power allocation into control channel (PUCCH) and data channel (PUSCH) components with different prioritization rules. For serving cells, PUCCH power is ensured first to maintain control reliability. For non-serving cells, power is allocated based on uplink grants and data requirements, balancing control and data transmission efficiency across different cell types.
Solution Approach 2:
The patent implements dynamic power adjustment where the UE calculates PUCCH and PUSCH power based on configured parameters, channel conditions, and priority rules. The base station dynamically configures power ratios, maximum powers, and allocation strategies through RRC signaling, allowing the system to adapt to varying traffic conditions while ensuring control information reliability.
Data Source
AI summary
Provided are a method and an apparatus for controlling uplink transmission power. A method for controlling uplink transmission power by a terminal may include allocating transmission power of one or more uplink control channels and/or one or more uplink data channels in order to transmit the uplink control channels and/or the uplink data channels in two or more cells and transmitting the uplink control channel and/or the uplink data channel to one or more base stations according to the allocated transmission power.