PUCCH Group Deactivation for Secondary Cell Load Management
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Solution Overview
Problem
Current LTE networks face challenges in efficiently managing PUCCH transmissions across multiple cells, leading to high PUCCH load on primary cells and limited flexibility in resource allocation, which affects network performance and battery life.
Innovation Solution
The implementation of multiple PUCCH groups, where cells are grouped to distribute PUCCH resources across secondary cells, allowing for flexible configuration and dynamic activation/deactivation of PUCCH SCells to offload traffic from primary cells and optimize resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If PUCCH transmissions are concentrated on primary cells, then control signaling is simplified, but PUCCH load on primary cells increases and network flexibility is reduced
Solution Approach 1:
The patent divides the network into multiple PUCCH groups, where each group is associated with a specific cell (primary or secondary). This segmentation allows PUCCH transmissions to be distributed across multiple cells rather than concentrated on primary cells, reducing the load on primary cells while maintaining manageable complexity through organized group structures.
Solution Approach 2:
The patent enables dynamic configuration and reconfiguration of PUCCH groups, allowing the network to adaptively assign PUCCH resources to different cells based on traffic conditions and network requirements. This dynamic capability enhances network flexibility while distributing PUCCH load across multiple cells as needed.
2Adaptability or versatility
If PUCCH resources are distributed across multiple cells, then network flexibility is enhanced, but device complexity for managing PUCCH groups increases
Solution Approach 1:
The patent creates PUCCH group configurations that can be universally applied across different cells and scenarios. The group configuration structure serves multiple functions: organizing cells, managing PUCCH resources, and enabling flexible association between cells and groups. This multi-functionality reduces the overall complexity of managing distributed PUCCH resources.
Solution Approach 2:
The patent implements mechanisms for monitoring and managing PUCCH group configurations, where the network can assess the status of PUCCH resources across different groups and dynamically adjust configurations. This feedback mechanism helps maintain optimal performance while managing the complexity of distributed PUCCH group configurations.
3Use of energy by moving object
If PUCCH SCell is deactivated, then battery power is conserved, but PUCCH transmission capability is reduced
Solution Approach 1:
The patent enables dynamic activation and deactivation of PUCCH SCells based on network conditions and traffic requirements. When PUCCH transmission is needed on a secondary cell, the PUCCH SCell can be activated; when not needed, it can be deactivated to conserve battery power. This dynamic control resolves the contradiction between power consumption and transmission capability.
Solution Approach 2:
The patent implements mechanisms where the system automatically manages the activation state of PUCCH SCells based on configured criteria and network conditions, reducing the need for manual intervention while optimizing both power consumption and transmission capability.
Data Source
AI summary
A base station transmits, to a wireless device, a configuration of a physical uplink control channel (PUCCH) group including a first secondary cell with a secondary PUCCH, and a second secondary cell. The base station transmits, in a first subframe, a media access control command including a bitmap indicating deactivation of the first secondary cell. In response to the deactivation of the first secondary cell, reception of channel state information for the second secondary cell is stopped in a second subframe that is eight subframes after the first subframe and stopping the reception does not occur before the second subframe.