De-configuring SCell PUCCH Resources via RRC Signaling
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Solution Overview
Problem
In carrier aggregation systems, there is a need for an efficient method to de-configure a cell from Physical Uplink Control Channel (PUCCH) resources, as existing methods are inadequate in managing cell deactivation and resource allocation efficiently.
Innovation Solution
A method for a User Equipment (UE) to configure a Secondary Cell (SCell) with PUCCH resources, receive RRC signaling for de-configuration, and subsequently deactivate the SCell by flushing HARQ buffers and stopping the SCell deactivation timer, while disabling SRS transmission, channel status reporting, and other activities on the SCell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If PUCCH resource is configured for SCell, then uplink control capability is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic configuration and de-configuration of PUCCH resources on SCell through RRC signaling. The system can adaptively enable or disable PUCCH functionality on secondary cells based on network conditions and service requirements, allowing the UE to transition between different operational states (configured with PUCCH, de-configured from PUCCH, activated, deactivated) to optimize the balance between control capability and device complexity.
2Productivity
If SCell is deactivated, then resource management efficiency is improved, but loss of time occurs during de-activation process
Solution Approach 1:
The patent employs a deactivation timer mechanism that is started or restarted when PUCCH resource de-configuration is received. This timer provides a predetermined time window for the UE to complete the de-activation process, including flushing HARQ buffers and stopping SCell activities. By establishing this time-bound procedure in advance, the system ensures efficient resource management while maintaining a structured timeline for the de-activation transition.
3Reliability
If HARQ buffers are flushed during de-activation, then data integrity is improved, but loss of information occurs
Solution Approach 1:
The patent converts the potentially harmful loss of HARQ buffer data into a beneficial mechanism for maintaining data integrity in the broader system context. When PUCCH resource de-configuration is received, the UE flushes HARQ buffers associated with the de-activated SCell. This prevents stale or inconsistent HARQ data from persisting in a cell that is no longer actively transmitting control information, thereby ensuring that the network and UE maintain synchronized views of active data transmissions across the carrier aggregation system.
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 de-configuring a cell from PUCCH resource in a carrier aggregation system, the method comprising: configuring a Secondary Cell (SCell) with Physical Uplink Control Channel (PUCCH) resource; receiving an RRC signaling indicating that the PUCCH resource PUCCH resource is de-configured from the SCell; and de-activating the SCell after the UE de-configures the PUCCH resource from the SCell according to the RRC signaling.