Configured Periodic Grant Timing Alignment Multicarrier Systems
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Solution Overview
Problem
Current multicarrier communication systems face challenges in efficiently managing signal timing and resource allocation across multiple carriers, leading to suboptimal performance in terms of data transmission and reception timing alignment, especially in scenarios involving carrier aggregation and dual connectivity.
Innovation Solution
The implementation of advanced signal processing techniques, including OFDM (Orthogonal Frequency Division Multiplexing) and dynamic modulation and coding schemes, along with timing advance mechanisms, to enable precise timing alignment and efficient resource allocation across multiple carriers, facilitating better multicarrier communication systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple carriers are aggregated for increased data transmission capacity, then productivity is improved, but device complexity increases due to challenging resource management and timing alignment across carriers
Solution Approach 1:
The patent segments the resource management function by introducing separate configured grants for different carriers, with each grant independently managed. This allows the system to handle multiple carriers through modular resource allocation rather than monolithic management, reducing the complexity burden while maintaining high data transmission capacity
Solution Approach 2:
The patent implements dynamic resource allocation through configured grants that can be activated or deactivated based on traffic conditions. The network can dynamically adjust which carriers are active and how resources are distributed across them, enabling the system to adapt to changing conditions and optimize the balance between productivity and complexity
2Reliability
If timing alignment is strictly enforced across all carriers, then reliability of data transmission is improved, but loss of time increases due to complex timing advance calculations and adjustments
Solution Approach 1:
The patent applies preliminary timing alignment through configured grants that are pre-configured with timing parameters. By establishing timing relationships in advance through RRC configuration and MAC CE activation, the system avoids real-time timing calculations and adjustments, thereby maintaining reliable timing alignment while minimizing time loss
Solution Approach 2:
The patent replaces complex mechanical timing adjustment mechanisms with a signaling-based approach. Instead of continuous timing advance calculations and adjustments, the system uses RRC configuration messages and MAC CE commands to establish and modify timing parameters, substituting computational mechanics with streamlined signaling procedures that reduce time loss while maintaining alignment accuracy
Data Source
AI summary
A wireless device receives parameters of a configured periodic grant. The parameters indicate: a timing offset and a symbol number; a first periodicity indicating a time interval between two subsequent resources; and demodulation reference signal parameters. One or more symbols of a resource of the configured periodic grant are determining based on the timing offset, the symbol number, and the first periodicity. One or more transport blocks are transmitted, via the resource of the configured periodic grant, employing the demodulation reference signal parameters.