UE Power Capability Signaling for Coverage-Edge Precoding
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing UE transmit power, particularly for UEs located at the edge of a coverage area, leading to potential signal dropouts and connectivity issues due to insufficient power transmission.
Innovation Solution
UEs transmit an indication of their maximum transmit power capability, and base stations provide a transmit precoding configuration based on this capability, enabling coherent and non-coherent UEs to transmit communication signals at full power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE transmits at increased power level to maintain connection at coverage edge, then connection reliability is improved, but power management complexity increases
Solution Approach 1:
The UE reports its maximum transmit power capability in advance to the network, allowing the base station to pre-configure appropriate transmit precoding settings. This preliminary capability indication eliminates the need for complex real-time power management decisions, as the network already knows the UE's power limits and can optimize transmissions accordingly.
Solution Approach 2:
The system implements a feedback mechanism where the UE indicates its maximum transmit power capability to the base station, and the base station responds with transmit precoding configuration. This feedback loop enables the network to adapt to UE power constraints and optimize connection reliability without requiring complex continuous power adjustment mechanisms.
2Illumination intensity
If UE transmits at full power to establish connection at coverage edge, then signal quality is improved, but energy consumption increases
Solution Approach 1:
The UE provides advance information about its maximum transmit power capability, enabling the base station to determine the minimum necessary transmit power required for reliable communication. This prevents unnecessary full-power transmissions and optimizes energy consumption by using only the power level needed for successful communication.
Solution Approach 2:
The system dynamically adjusts the transmit power parameter based on UE capability indication and channel conditions. Instead of always transmitting at full power, the system modifies the power level to match both the UE's capabilities and the actual communication requirements, thereby reducing energy consumption while maintaining signal quality.
3Reliability
If network configures transmit precoding based on UE capability, then communication reliability is improved, but signaling overhead increases
Solution Approach 1:
The UE reports its maximum transmit power capability as a preliminary parameter, which the base station uses to configure transmit precoding. By establishing this capability indication in advance, the network can efficiently configure appropriate transmission parameters without requiring extensive ongoing signaling, thus minimizing overhead while maintaining reliability.
Solution Approach 2:
The maximum transmit power capability indication serves multiple functions: it enables the base station to configure transmit precoding, determine appropriate power levels for various scenarios, and optimize communication parameters. This multi-functional capability report reduces the need for separate signaling messages, thereby minimizing signaling overhead.
Data Source
AI summary
Wireless communications systems and methods related to wireless communications in a system are provided. A user equipment (UE) may transmit to a base station (BS), an indication of a maximum transmit power capability of the UE. The UE may receive from the BS, a transmit precoding configuration based on the UE's maximum transmit power capability. Additionally, the UE may transmit to the BS, a communication signal using the transmit precoding configuration.