Cooperative 5G Signal Reception Using Cross-Cell QCL References
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Solution Overview
Problem
There is a need for improved data transmission and reception approaches in wireless communication systems, particularly in 5G networks, to enhance network cooperation and support various service types such as eMBB, mMTC, and URLLC, which require higher data rates, increased coverage, and ultra-low latency.
Innovation Solution
A method and device for transmitting and receiving signals between a transmission node and a UE through cooperative communication, utilizing cell configuration information to identify a QCL reference antenna port based on synchronization signal blocks (SSB) or channel state information reference signals (CSI-RS) associated with different physical cell identities (PCIs) for improved reliability and capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cooperative communication is implemented with multiple transmission points, then reliability and capacity of data transmission are improved, but device complexity and configuration management become more complex
Solution Approach 1:
The patent applies preliminary action by pre-configuring QCL relationships and reference antenna ports before actual data transmission. The base station configures TCI states and QCL parameters in advance, allowing the UE to quickly identify reference antenna ports from SSB or CSI-RS of different PCIs when needed, thus reducing real-time configuration complexity while maintaining multi-point transmission reliability
Solution Approach 2:
The patent uses QCL reference antenna ports as intermediaries to connect multiple transmission points (different PCIs) to the UE. By establishing QCL relationships between reference antenna ports from different cells and the target antenna port, the system enables cooperative communication without requiring direct complex coordination between all transmission points, simplifying the overall system management
2Productivity
If QCL reference antenna port is identified based on SSB or CSI-RS from different PCIs, then transmission capacity and coverage are increased, but measurement precision and identification accuracy become more challenging
Solution Approach 1:
The patent segments the identification process by separately configuring and managing QCL relationships for different reference signals (SSB and CSI-RS) from different PCIs. Each reference signal maintains its own QCL relationship configuration, allowing the UE to independently measure and identify each reference antenna port without interference, thus maintaining measurement precision while increasing transmission capacity through multiple points
Solution Approach 2:
The patent applies parameter changes by dynamically selecting and switching between different QCL configurations based on transmission needs. The system can change the identified reference antenna port by updating TCI state indications, allowing flexible adaptation between different PCIs and reference signals while maintaining accurate identification through predefined QCL parameters
Data Source
AI summary
The present disclosure relates to a communication technique for converging IoT technology with a 5G communication system for supporting a higher data transmission rate beyond a 4G system, and a system therefor. The present disclosure may be applied to an intelligent service (for example, a smart home, a smart building, a smart city, a smart car or connected car, health care, digital education, retail business, a security and safety-related service, etc.) on the basis of 5G communication technology and IoT-related technology. In addition, the present disclosure relates to a method and device for carrying out cooperative communication in a wireless communication system. A method of a terminal of a communication system, according to one embodiment of the present disclosure, comprises the steps of: receiving, from a base station associated with a first cell, cell configuration information including a TCI configuration and a QCL configuration; checking a QCL reference antenna port on the basis of the cell configuration information; and receiving a signal from the base station on the basis of a QCL relationship with the checked QCL reference antenna port, wherein the QCL reference antenna port may be checked on the basis of a CSI-RS or SSB associated with a second cell.