PUCCH Resource De-configuration in Carrier Aggregation SCells
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Solution Overview
Problem
In wireless communication systems, particularly in carrier aggregation, there is a need for efficient de-configuration of Physical Uplink Control Channel (PUCCH) resources from Secondary Cells (SCells) to optimize resource management and reduce power consumption.
Innovation Solution
A method and apparatus for a UE to configure SCells with PUCCH resources, receive RRC signaling indicating de-configuration, and activate or deactivate the SCells accordingly, with the option to set SCell deactivation timers to infinity or flush HARQ buffers based on the signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PUCCH resources are configured for SCells in carrier aggregation, then uplink control capability is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent implements dynamic configuration of PUCCH resources on SCells through RRC signaling. The network can flexibly configure or de-configure PUCCH resources on SCells based on traffic conditions and control requirements, allowing the system to adapt between having PUCCH capability (for better control reliability) and not having it (for reduced complexity), thus resolving the contradiction between reliability and device complexity
Solution Approach 2:
The patent changes the configuration parameter state of PUCCH resources on SCells by receiving RRC signaling that indicates de-configuration. This parameter change allows the system to transition between different operational states (with or without PUCCH on SCell) to balance control capability needs against device complexity constraints
2Reliability
If PUCCH resources are configured for SCells, then control channel functionality is improved, but power consumption increases
Solution Approach 1:
The patent enables periodic or conditional configuration of PUCCH resources on SCells through RRC signaling rather than continuous configuration. The network can periodically assess whether PUCCH functionality on SCell is needed and configure/de-configure accordingly, reducing power consumption when the functionality is not immediately required while maintaining control channel capability when needed
Solution Approach 2:
The dynamic nature of the configuration allows the system to switch between power-efficient states (PUCCH de-configured) and performance-optimized states (PUCCH configured) based on real-time network conditions and traffic requirements, resolving the contradiction between control channel functionality and power consumption
3Adaptability or versatility
If RRC signaling is used to de-configure PUCCH resources, then resource management flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts the PUCCH configuration management from static initial configuration and separates it into dynamic RRC signaling operations. This allows the network to selectively de-configure PUCCH resources on specific SCells only when needed, rather than managing all resources through continuous signaling, thus achieving flexibility while controlling signaling overhead by taking action only when necessary
Data Source
AI summary
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for configuring a Secondary Cell (SCell) with Physical Uplink Control Channel (PUCCH) resource; receiving an Radio Resource Control (RRC) signaling indicating that the PUCCH resource is de-configured from the SCell, wherein the RRC signaling includes an indication which indicates whether the UE activates or deactivates the SCell from which PUCCH resource is de-configured; de-configuring the PUCCH resource from the SCell; and activating or de-activating the SCell according to the indication after the UE de-configures PUCCH from the SCell.