Terminal PUSCH Power Control via MAC CE Signaling
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Solution Overview
Problem
In next-generation mobile communication systems, the existing methods for determining power control parameters for uplink transmissions in radio communication systems, such as NR, are limited, leading to potential deterioration of system performance if not appropriately determined.
Innovation Solution
A terminal is equipped with a control section that determines power control parameters for the Physical Uplink Shared Channel (PUSCH) based on Medium Access Control (MAC) control elements, enabling more precise transmission power control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power control parameters are determined using existing DCI-based methods, then the transmission can be controlled, but the number of candidate values is limited and system performance deteriorates
Solution Approach 1:
The patent changes the signaling method from DCI to MAC CE for transmitting power control parameters. MAC CE provides a more flexible parameter structure that can accommodate a larger number of candidate values for power control, thereby improving system performance without being constrained by the limited DCI format.
2Ease of operation
If DCI is used to indicate power control parameters, then transmission control is achieved, but the parameter value options are restricted
Solution Approach 1:
The patent segments the power control parameter indication into two parts: the MAC CE provides the parameter index or identifier, and the actual parameter values are stored in a pre-configured table or buffer. This segmentation allows DCI to maintain its simple control function while MAC CE provides the extended parameter value options.
Solution Approach 2:
The patent introduces MAC CE as an intermediary between the network and the terminal for power control parameter transmission. MAC CE acts as a mediator that carries parameter indices or additional information, which then maps to actual power control values, thereby expanding the parameter value options without complicating the DCI structure.
Data Source
AI summary
A terminal according to one aspect of the present disclosure includes: a control section that determines a power control parameter for a physical uplink shared channel (PUSCH), based on reception of a medium access control control element (MAC CE); and a transmitting section that transmits the PUSCH by using transmission power based on the power control parameter. According to one aspect of the present disclosure, a parameter for transmission power control can be appropriately determined.