PUCCH Secondary Cell Deactivation Timer for Wireless Load Management
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Solution Overview
Problem
Current multicarrier communication systems face challenges in efficiently managing multiple physical uplink control channel (PUCCH) groups, leading to high PUCCH load on primary cells and limited flexibility in resource allocation, especially as the number of aggregated carriers and PUCCH payloads increase.
Innovation Solution
The implementation of multiple PUCCH groups, where cells are grouped to distribute PUCCH resources across primary and secondary cells, allowing for independent configuration and activation/deactivation of PUCCH resources to offload traffic and reduce battery power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple PUCCH groups are implemented to distribute PUCCH resources, then PUCCH load on primary cells is reduced and resource allocation flexibility is enhanced, but device complexity and configuration management complexity increase
Solution Approach 1:
The patent divides the PUCCH resources into multiple independent PUCCH groups (first PUCCH group and second PUCCH group), each associated with different serving cells. This segmentation allows PUCCH resources to be distributed across multiple cells rather than concentrated on primary cells, reducing the load on primary cells while maintaining manageable complexity through structured group organization.
Solution Approach 2:
The patent implements dynamic activation and deactivation of PUCCH groups based on traffic conditions and battery status. The system can switch between first PUCCH group (with PUCCH resources) and second PUCCH group (without PUCCH resources) depending on whether the device has data to transmit or is in battery saving mode, providing flexibility without permanent complexity.
2Device complexity
If PUCCH resources are concentrated on primary cells, then configuration management is simplified, but PUCCH load on primary cells increases and resource allocation flexibility is limited
Solution Approach 1:
By segmenting PUCCH resources into multiple groups associated with different serving cells, the patent distributes the PUCCH load away from primary cells to secondary cells. This segmentation reduces the concentration of PUCCH traffic on primary cells, improving load distribution while the grouped structure maintains configuration manageability.
Solution Approach 2:
The patent makes secondary cells multi-functional by enabling them to carry PUCCH resources in addition to their primary data transmission function. This allows secondary cells to serve dual purposes: normal data communication and control channel transmission, thereby distributing PUCCH load effectively while utilizing existing cell infrastructure.
3Reliability
If PUCCH resources are continuously activated, then communication reliability is maintained, but battery power consumption increases
Solution Approach 1:
The patent implements dynamic switching between first PUCCH group (activated with PUCCH resources) and second PUCCH group (deactivated without PUCCH resources) based on device state. When data transmission is needed, the first group is activated ensuring reliable communication. When in battery saving mode with no data, the second group is used to conserve power, maintaining reliability only when necessary.
Solution Approach 2:
The patent applies different quality levels of PUCCH resource activation locally based on device conditions. Instead of uniform activation across all cells, the system selectively activates PUCCH resources on specific cells (first or second PUCCH group) depending on local conditions such as data buffer status and battery level, optimizing the balance between reliability and power consumption.
4Use of energy by moving object
If PUCCH resources are deactivated to save battery power, then energy consumption is reduced, but communication reliability and responsiveness decrease
Solution Approach 1:
The patent employs dynamic activation strategies where PUCCH resources are deactivated (second PUCCH group) during battery saving modes but can be rapidly reactivated (switching to first PUCCH group) when data transmission requirements arise. This dynamic approach ensures power savings during idle periods while maintaining the capability for immediate communication restoration when needed.
Solution Approach 2:
The patent prepares both first and second PUCCH groups in advance with their respective configurations, so that switching between activated and deactivated states can occur rapidly without delay. The preliminary configuration of alternative PUCCH groups ensures that when power saving is needed, deactivation is already structured, and when communication is needed, activation can immediately occur without setup delays.
Data Source
AI summary
A wireless device receives configuration parameters of cells grouped into physical uplink control channel (PUCCH) groups. The PUCCH groups comprise a secondary PUCCH group. The secondary PUCCH group comprises a PUCCH secondary cell with a secondary PUCCH. A deactivation timer of the PUCCH secondary cell is restarts in response to a physical downlink control channel (PDCCH) on any secondary cell, other than the PUCCH secondary cell, in the secondary PUCCH group indicating an uplink grant or a downlink assignment. The PUCCH secondary cell is deactivated in response to the deactivation timer expiring.