PDCCH Repetitive Transmission via TCI State Segmentation
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Solution Overview
Problem
Current 5G communication systems face challenges in effectively providing repetitive transmission of downlink control information in network cooperative communications, which is crucial for maintaining reliable data transmission and efficient resource allocation in mobile communication systems.
Innovation Solution
The solution involves a terminal and base station configuration that includes a transceiver and controller, capable of receiving and transmitting specific transmission configuration indication states and downlink control information, allowing for the identification of matching TCI states and the subsequent reception of physical downlink shared channels based on this information, ensuring effective resource allocation and data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repetitive transmission of downlink control information is implemented in network cooperative communications, then data transmission reliability is improved, but device complexity and resource allocation difficulty increase
Solution Approach 1:
The patent divides the downlink control information transmission into multiple segments by configuring separate TCI state sets for different CORESET pool indices. Each CORESET pool index (0 or 1) has its own activated TCI state set, allowing the system to segment the transmission reliability improvement into manageable parts rather than requiring complete system-wide complexity increases.
Solution Approach 2:
The patent applies preliminary action by pre-configuring and activating TCI state sets for different CORESET pool indices before actual data transmission. The base station sends activation indications in advance, allowing the terminal to prepare multiple TCI state sets that can be quickly switched between during repetitive transmissions, thereby improving reliability without adding operational complexity during actual transmission.
2Reliability
If multiple TCI state sets are configured for different CORESET pool indices, then transmission reliability is improved, but information management complexity increases
Solution Approach 1:
The patent uses copying by creating duplicate TCI state sets for different CORESET pool indices. Instead of managing a single complex TCI state structure, the system copies the TCI state configuration into separate sets (first TCI state set for CORESET pool index 0, second TCI state set for CORESET pool index 1), making information management simpler and more reliable through redundancy.
Solution Approach 2:
The patent applies local quality by assigning specific TCI state sets to specific CORESET pool indices locally. Each CORESET pool index has its own dedicated TCI state set with appropriate quality characteristics, allowing the system to optimize information management locally for each pool index rather than managing a single global TCI state structure.
3Productivity
If network cooperative communications with repetitive transmission are implemented, then service effectiveness is improved, but system resource allocation difficulty increases
Solution Approach 1:
The patent applies dynamics by enabling flexible switching between different TCI state sets based on the CORESET pool index used for each transmission. The system can dynamically select which TCI state set to use for each repetitive transmission instance, allowing adaptive resource allocation that improves service effectiveness without requiring static complex configuration for all possible scenarios.
Data Source
AI summary
The present disclosure relates to a communication technique that converges a 5G communication system for supporting a higher data rate after a 4G system with IoT technology, and a system thereof. The disclosure may be applied to intelligent services (e.g., smart home, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail business, security and safety-related services, etc.) based on 5G communication technology and IoT-related technology. The disclosure discloses a coverage enhancement method for a PDCCH in a wireless communication system.