Terminal Power Reporting for Higher-Power Uplink Coverage
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Solution Overview
Problem
Uplink transmission in future radio communication systems, such as NR, faces challenges with reduced coverage and deteriorated communication quality due to insufficient consideration of higher transmission power beyond nominal maximum output power.
Innovation Solution
A terminal and base station system that includes a transmitting section for reporting state information on the utilization of higher output power and a control section for managing uplink transmission based on this information, enabling high-power CA/DC operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If higher transmission power than nominal maximum output power is used for uplink transmission, then UL transmission coverage is improved, but transmission power control complexity increases
Solution Approach 1:
The terminal performs preliminary capability reporting to the base station by including state information in power headroom reports, indicating whether higher output power than nominal maximum output power can be utilized. This advance notification allows the base station to prepare appropriate reception parameters and scheduling decisions before actual high-power transmission occurs, thereby enabling coverage enhancement without creating operational complexity at transmission time.
Solution Approach 2:
The system establishes a feedback mechanism where the terminal reports its higher power capability status to the base station through power headroom reports. The base station then uses this feedback information to adjust downlink reception parameters and scheduling decisions. This closed-loop feedback approach allows dynamic adaptation to varying transmission power capabilities, resolving the contradiction between achieving extended coverage and maintaining simple power control operations.
2Productivity
If higher output power is utilized for uplink transmission, then communication quality and throughput are improved, but power management complexity increases
Solution Approach 1:
The terminal includes state information indicating higher output power capability in advance within power headroom reports. This preliminary notification enables the base station to pre-configure appropriate power management parameters and scheduling strategies, allowing high throughput to be achieved through optimized resource allocation rather than brute-force high power transmission, thus reducing actual power management complexity during data transmission.
Solution Approach 2:
The power management system dynamically adapts to the terminal's actual capability by using the reported state information to adjust downlink reception parameters and scheduling decisions. The system transitions from static nominal power operation to dynamic power adaptation, where transmission parameters are continuously optimized based on real-time capability reports, achieving improved throughput while managing complexity through intelligent adaptation rather than fixed high-power operation.
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes a transmitting section that transmits a report including one or more pieces of state information regarding utilization of higher output power than nominal maximum output power corresponding to a band, and a control section that controls uplink transmission using the output power when the state information indicates that the utilization is possible. According to one aspect of the present disclosure, the coverage of UL transmission can be improved.