Radio Base Station TRP Group Power Control
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Solution Overview
Problem
Current radio base station technologies cannot independently control transmission power for each transmission reception point (TRP) within a radio base station, leading to inconsistent signal-to-interference plus noise ratios (SINRs) across TRPs, limiting the ability to optimize wireless terminal transmission powers.
Innovation Solution
A radio base station with multiple antenna sections and a measurement unit that groups reception beams and performs transmission power control for wireless terminal transmission beams in units of TRP groups based on measured reception quality, allowing for tailored power adjustments for each TRP.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission power control is performed using conventional methods, then the system maintains simple control mechanisms, but the SINR consistency across multiple TRPs deteriorates
Solution Approach 1:
The patent segments the transmission power control by introducing separate TPC commands for each TRP group. The base station divides TRPs into multiple groups and transmits independent TPC commands to wireless terminals for each group, enabling differentiated power control per TRP group while maintaining manageable control complexity through structured segmentation.
Solution Approach 2:
The patent applies local quality by allowing different transmission power adjustments for different TRP groups based on their specific reception conditions. Each TRP group can have customized TPC commands tailored to its local SINR characteristics, path loss conditions, and interference environment, rather than applying uniform power control across all TRPs.
2Reliability
If separate TPC commands are transmitted for each TRP, then the SINR optimization for each TRP improves, but the control overhead increases
Solution Approach 1:
The patent merges multiple TPC commands into a single downlink control information (DCI) message transmitted via PDCCH. Instead of sending separate control messages for each TRP, the base station combines TPC commands for multiple TRP groups into one aggregated DCI structure, reducing the quantity of control transmissions while maintaining the ability to optimize SINR for each TRP group independently.
Solution Approach 2:
The patent creates a universal TPC command structure that can simultaneously serve multiple TRP groups. The DCI message is designed to carry power control information for different TRP groups in a multi-functional format, allowing a single control transmission to perform the function of optimizing power for multiple TRPs rather than requiring separate dedicated commands for each.
3Ease of operation
If uniform transmission power is set for all terminal transmission beams, then the control complexity is reduced, but the reception quality consistency across TRPs deteriorates
Solution Approach 1:
The patent introduces dynamic transmission power control where the terminal transmission beam power is no longer fixed but can be adjusted based on TRP group conditions. The wireless terminal dynamically modifies its transmission power for different beams corresponding to different TRP groups according to received TPC commands, enabling adaptive power control that maintains reception quality consistency while preserving operational simplicity through automated adjustment.
Data Source
AI summary
The present invention includes: a plurality of antenna sections, each of which to generate base station reception beams and to receive, by using the base station reception beams, one or more signals transmitted from a wireless terminal using one or more terminal transmission beams; a measurement unit that measures reception quality of each of the signals for each of the base station reception beams; and a control unit that groups the base station reception beams into groups in units of the antenna sections, and perform transmission power control on the terminal transmission beams of the wireless terminal in units of the groups, on the basis of a result of measurement of the measurement unit in units of the groups.