PUCCH Power Control on Secondary Carriers With Closed-Loop Segmentation
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Solution Overview
Problem
There is a need for improved power control mechanisms during uplink transmissions, particularly in wireless communication systems utilizing carrier aggregation, to address issues related to delays and inefficiencies in transmitting uplink control information on secondary component carriers.
Innovation Solution
Implementing carrier-specific accumulative closed-loop power control, where power control values are separately accumulated for each uplink component carrier, including a primary and secondary component carrier, to optimize PUCCH transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation is implemented to allow UE to communicate using primary and secondary component carriers, then communication capacity and data rate are improved, but power control complexity and transmission delay increase
Solution Approach 1:
The patent segments the power control mechanism by introducing carrier-specific accumulative closed-loop power control, where separate power control values are maintained for each component carrier (primary and secondary). This segmentation allows independent power adjustment per carrier, resolving the complexity issue by organizing power control parameters in a structured, carrier-specific manner rather than a unified approach.
Solution Approach 2:
The patent applies preliminary action by pre-configuring power control parameters including pathloss reference signals and power control adjustment states for each component carrier before transmission begins. The base station prepares and signals these parameters to the UE in advance through RRC configuration, enabling the UE to perform power control calculations efficiently without real-time delays.
2Productivity
If carrier aggregation is implemented to allow UE to communicate using primary and secondary component carriers, then communication capacity and data rate are improved, but transmission delay increases
Solution Approach 1:
The base station pre-configures power control parameters including pathloss reference signals, power control adjustment states, and initial power values for each component carrier before the UE needs to transmit. This preliminary configuration eliminates real-time calculation delays and allows the UE to immediately perform power control adjustments when transmission is required.
Solution Approach 2:
The patent enables the UE to autonomously perform power control calculations using pre-configured parameters and accumulated power control values stored for each component carrier. The UE independently determines transmit power based on pathloss measurements and accumulated adjustments without requiring continuous base station intervention, thereby reducing transmission delay.
3Measurement precision
If separate power control values are accumulated for each component carrier, then power control accuracy is improved, but device complexity increases
Solution Approach 1:
The patent segments power control parameters and accumulation states by component carrier, with separate accumulative closed-loop power control values maintained for the primary component carrier and each secondary component carrier. This segmentation improves accuracy by allowing carrier-specific optimization while organizing complexity into manageable, structured units that can be independently configured and managed.
Solution Approach 2:
The patent introduces specific parameters such as pathloss reference signal identifiers and power control adjustment state indicators that change per component carrier. These parameter variations enable accurate, carrier-specific power control while providing a standardized framework that manages complexity through consistent parameter naming and organization across different carriers.
Data Source
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AI summary
Aspects relate to supporting power control for physical uplink control channel (PUCCH) transmissions on an uplink secondary component carrier (SCC) of a wireless communication system. In some aspects, a user equipment (UE) receives a power control configuration from a base station for use by the UE for a PUCCH transmission on a selected uplink SCC. The UE then transmits, based at least in part on the power control configuration, the PUCCH to the base station on the selected uplink SCC. Closed-loop and open-loop power control examples are provided. In some aspects, common or shared power control configurations are provided by the base station for use with each component carrier of a PUCCH group. In other aspects, carrier-specific power control configurations are provided by the base station.