Base Station UE Grouping for Downlink Power Control
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Solution Overview
Problem
Wireless communication systems face challenges in reducing inter-channel interference between downlink (DL) and uplink (UL) transmissions, leading to degraded quality and range of UL signals due to concurrent DL transmissions from base stations.
Innovation Solution
Base stations divide UEs into groups and use different transmit power levels for DL data transmissions based on the ability of UEs to receive and decode signals, adjusting power levels to minimize interference on UL channels while maintaining DL signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations transmit DL data at high power levels to ensure DL signal quality, then DL reception is improved, but inter-channel interference on UL channels increases
Solution Approach 1:
The patent applies local quality by assigning different Tx power levels to different UE groups based on their specific channel conditions. UEs with good channel quality (e.g., closer to base station) are assigned lower Tx power levels, while UEs with poor channel quality (e.g., farther away) are assigned higher Tx power levels. This localized power allocation optimizes DL signal quality for each UE while minimizing overall inter-channel interference on UL channels.
Solution Approach 2:
The patent changes the power level parameter dynamically by adjusting Tx power based on UE grouping and channel conditions. The base station monitors channel quality indicators and reconfigures Tx power levels accordingly, allowing the system to adapt to changing conditions and maintain optimal performance in terms of both DL reception quality and UL interference levels.
2Reliability
If base stations use uniform high Tx power for all UEs, then all UEs receive good DL signal quality, but power consumption increases and UL interference worsens
Solution Approach 1:
Instead of applying uniform high power to all UEs, the patent applies local quality by tailoring Tx power levels to the specific needs of each UE group. This ensures that only UEs requiring high power (those with poor channel conditions) receive it, while UEs with good channel conditions receive lower power, thereby reducing overall base station power consumption while maintaining adequate DL signal quality for all UEs.
Solution Approach 2:
The patent applies partial action by providing high Tx power only to the extent necessary for each UE group. Rather than over-provisioning power to all UEs uniformly, the system provides just enough power to meet the requirements of each group, avoiding excessive power consumption while ensuring minimum quality thresholds are met for all users.
3Use of energy by stationary object
If base stations reduce DL Tx power to minimize UL interference, then power consumption decreases, but UL signal quality and range degrade
Solution Approach 1:
The patent applies local quality by creating different Tx power levels tailored to specific UE groups rather than using a single uniform power level. This allows the base station to reduce power for groups with good channel conditions (minimizing interference and power consumption) while maintaining adequate power for groups with poor channel conditions (preserving UL signal quality and range where needed).
Solution Approach 2:
The system dynamically changes power parameters by adjusting Tx power levels based on channel conditions and UE grouping. This allows the base station to optimize the balance between power consumption and UL transmission quality, reducing power when conditions permit while maintaining quality when needed.
Data Source
AI summary
Aspects of the disclosure relate to downlink (DL) transmissions using various powers and assigning frequency resources based on the powers. An example base station may transmit, to a first user equipment (UE), an indication of a first transmit (Tx) power for one or more first DL transmissions to a first group of a plurality of groups. The first group may include the first UE. The first Tx power may have a first power level different from a second power level of a second Tx power for one or more second DL transmissions to a second group of the plurality of groups. Then, the base station may transmit, to the first UE, a first DL transmission of the one or more first DL transmissions using the first Tx power. Other aspects, embodiments, and features are also claimed and described.