Carrier Group MIMO Layer Adaptation for Power Savings
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Solution Overview
Problem
In wireless communication systems, especially in carrier aggregation (CA) environments, user equipment (UE) faces challenges in achieving power savings due to the inability to activate or deactivate antennas when multiple component carriers (CCs) or bandwidth parts (BWPs) are configured with different numbers of multiple-input multiple-output (MIMO) layers.
Innovation Solution
The implementation of carrier group-based MIMO layer configuration and antenna adaptation, where the UE is configured with groups of CCs and sets of maximum MIMO layers, allowing the UE to determine and adjust the number of MIMO layers across CCs within a group, enabling joint antenna adaptation and power savings even in CA scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple component carriers (CCs) or bandwidth parts (BWPs) are configured with different numbers of MIMO layers, then the system can support diverse MIMO configurations for different carriers, but the user equipment (UE) cannot activate or deactivate antennas to achieve power savings
Solution Approach 1:
The patent segments the CCs/BWPs into groups and assigns different MIMO layer configurations to different groups. This allows the UE to activate or deactivate antenna groups based on which CCs/BWPs are active, enabling power savings while maintaining configuration flexibility. The segmentation is implemented through grouping CCs/BWPs and configuring different max_MIMO_layer values for different groups.
Solution Approach 2:
The patent introduces dynamic adaptation where the UE can change the number of active MIMO layers based on the actual CCs/BWPs being used. The UE determines the number of MIMO layers to activate based on the active CCs/BWPs configuration, allowing dynamic power adjustment rather than static antenna activation/deactivation.
2Use of energy by moving object
If the UE is configured with groups of CCs and sets of maximum MIMO layers, then the UE can align MIMO layer configurations across CCs to achieve power savings, but the configuration and control complexity increases
Solution Approach 1:
The patent makes the MIMO layer configuration mechanism universal by applying the same grouping and configuration approach across different CCs and BWPs. The UE uses a unified method to determine max_MIMO_layer for all active CCs/BWPs based on their group assignments, simplifying the complexity through standardization rather than handling each carrier individually.
Solution Approach 2:
The patent incorporates feedback mechanisms where the UE reports its capability regarding max_MIMO_layer configuration and the network provides feedback on which CCs/BWPs to activate. This feedback loop simplifies the configuration process by allowing the network to make informed decisions about active carriers based on UE capabilities and network conditions.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for carrier group based multiple-input multiple-output (MIMO) layers and antenna adaptation. A method that may be performed by a user equipment (UE) includes receiving a configuration of one or more groups of component carriers (CCs) and, for each group of CCs, one or more sets of configured maximum number of MIMO layers. Each set includes a configured maximum number of MIMO layers associated with each CC in the group. The UE receives an indication of at least one of the one or more sets and determines the configured maximum number of MIMO layers associated with each CC in the corresponding group of CCs based on the indication.