Secondary Cell Activation Using TRS-Based Channel State Reporting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Efficient methods for activating a secondary cell (SCell) in a wireless communication system, particularly in 5G networks, are lacking, especially in scenarios requiring high reliability and low latency, such as those supporting ultra-reliable and low latency communication (URLLC) services.
Innovation Solution
A method involving a terminal receiving messages from a base station for activating a SCell, including channel state reporting based on aperiodic tracking reference signals (TRS), and the base station transmitting and receiving channel state reports to manage SCell activation efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional cell activation methods are used, then the basic cell activation function is maintained, but the activation speed is slow and cannot meet low latency requirements
Solution Approach 1:
The patent applies preliminary action by pre-configuring SCell parameters including physical cell identity, frequency information, and measurement resources before activation is needed. When activation is required, the terminal can quickly retrieve and utilize these pre-configured parameters, significantly reducing activation time and meeting low latency requirements for URLLC services.
Solution Approach 2:
The patent segments the cell activation process into distinct phases: RRC connection establishment with pre-configuration of SCell parameters, activation decision based on channel state reports, and actual activation execution. This segmentation allows for optimized processing at each phase, improving overall activation speed while maintaining system reliability.
2Measurement precision
If comprehensive channel state measurement is performed, then measurement precision is improved, but the measurement time increases and latency is not reduced
Solution Approach 1:
The patent applies partial action by selectively measuring only the necessary channel state information for SCell activation rather than performing comprehensive measurements. The terminal measures channel states based on pre-configured measurement resources and aperiodic tracking reference signals, obtaining sufficient precision for activation decisions without the time cost of full measurements.
Solution Approach 2:
The patent utilizes periodic and aperiodic tracking reference signals to obtain channel state information. The terminal can configure periodic measurements for ongoing channel monitoring and aperiodic measurements for activation decisions, balancing measurement precision with time efficiency by only performing measurements when needed for activation.
3Power
If multiple SCells are configured for high data rate, then the data transmission capability is improved, but the system complexity increases
Solution Approach 1:
The patent applies universality by using a unified activation management mechanism that handles multiple SCells through standardized procedures. The terminal and base station use common channel state reporting and activation decision processes across all SCells, reducing the complexity increase that would result from managing multiple cells with different specialized procedures.
Solution Approach 2:
The patent implements dynamic activation and deactivation of SCells based on real-time channel conditions and traffic requirements. Rather than maintaining all configured SCells in active state, the system dynamically activates only those needed for current data transmission, reducing management complexity while preserving high data rate capability when required.
4Reliability
If strict URLLC requirements are applied, then reliability is improved, but the transmission time interval must be shortened, increasing system complexity
Solution Approach 1:
The patent applies parameter changes by configuring different TTI lengths and channel state reporting periods based on service requirements. For URLLC services, the system uses shorter TTIs and adjusted reporting intervals to meet reliability requirements, while maintaining compatibility with longer TTIs for eMBB services. This flexible parameter adjustment avoids the need for completely separate system configurations.
Data Source
AI summary
The present disclosure relates to a communication technique for merging IoT technology with a 5G communication system for supporting a data transmission rate higher than that of a 4G system, and a system therefor. The present disclosure can be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security- and safety-related services, and the like) on the basis of 5G communication technology and IoT-related technology. Embodiments of the present disclosure relate to a wireless communication system and, more particularly, to a cell activation method and device in a wireless communication system.