Uplink Power Control for PSD Delta Management
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing power for uplink channels, particularly in ensuring that the difference in power spectral densities between control and data channels does not exceed the maximum limit, to avoid exceeding the link budget and maintaining network performance.
Innovation Solution
A method where user equipment determines the transmit powers for control and data channels to be within a specified difference, allowing for resource block reduction based on these powers, ensuring that the power spectral density difference is less than the maximum accommodable, and transmitting these channels in contiguous resource blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE transmits control channel and data channel in the same subframe with different PSDs, then the uplink control functionality is improved, but the device complexity increases due to power management requirements
Solution Approach 1:
The patent changes the power spectral density parameter by applying a PSD reduction factor to the control channel transmission. This allows the UE to transmit both control and data channels simultaneously while managing power differences within acceptable limits, thereby improving uplink control functionality without excessive complexity increase
Solution Approach 2:
The patent applies partial action by selectively reducing PSD only for the control channel when necessary, rather than uniformly reducing all transmissions. This targeted approach maintains necessary control functionality while avoiding unnecessary power reduction on data channels, balancing functionality improvement with complexity management
2Adaptability or versatility
If the PSD difference between control channel and data channel exceeds the maximum limit, then the resource allocation flexibility is improved, but the link budget constraint is violated causing network performance degradation
Solution Approach 1:
The patent implements feedback by monitoring the PSD difference between control and data channels and dynamically adjusting the control channel PSD using a reduction factor. This feedback mechanism ensures the PSD difference remains within the maximum limit, maintaining link budget compliance while allowing resource allocation flexibility
Solution Approach 2:
The patent makes the PSD reduction factor dynamic rather than fixed, adjusting it based on the actual PSD difference between control and data channels. This dynamic adjustment allows the system to maximize resource allocation flexibility while continuously ensuring link budget constraints are not violated
Data Source
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AI summary
A user equipment (UE) may transmit a control channel and a data channel using contiguous resource allocations of a portion of a slot. The control channel may be associated with control channel power spectral density (PSD) and the data channel may be associated with a data channel PSD. When a difference between the control channel PSD and the data channel PSD exceeds a maximum delta value, the UE may experience degraded performance as a result of tonal interference and/or the like. In some aspects, the UE may determine a control channel transmit power for the control channel and a data channel transmit power for the data channel. The control channel transmit power and the data channel transmit power may be determined such that the maximum delta value is not exceeded and that a threshold relating to a link budget is satisfied, thereby ensuring that performance is not degraded.