CDM Group TCI Mapping for Multi-Source Data Channel Transmission
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Solution Overview
Problem
Current techniques for conveying single-source transmission configurations in wireless communication networks face challenges when extending them to support multiple transmission sources, particularly in multi-source scenarios, leading to inefficiencies and limitations in data transmission.
Innovation Solution
The implementation of methods for receiving and transmitting multiple Transmission Configuration Indicator (TCI) states with source RS pairs and quasi-colocation (QCL) relations for demodulation reference signals (DM-RS) across code-division multiplexing (CDM) groups, allowing for improved channel parameter determination and scheduling of physical data channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single-source transmission configurations are used, then device complexity is reduced, but adaptability to multi-source scenarios deteriorates
Solution Approach 1:
The patent segments the transmission configuration by introducing separate TCI states for different CDM groups. Each CDM group (first and second CDM groups) can be independently configured with its own TCI state, allowing the system to handle multiple transmission sources through structured segmentation of the configuration space.
Solution Approach 2:
The patent adds a new dimension to the transmission configuration by introducing CDM group-based TCI state indication. Instead of a single unified configuration, the system now operates in a multi-dimensional space where each CDM group has its own configuration parameters, enabling multi-source transmission without proportionally increasing overall complexity.
2Adaptability or versatility
If multiple TCI states with source RS pairs are implemented, then adaptability to multi-source scenarios is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by allowing different TCI states to be associated with different CDM groups. Each CDM group can have customized QCL relations and source RS pairs tailored to its specific transmission requirements, rather than applying a uniform configuration across all groups. This localized approach enables multi-source support while managing complexity through targeted configuration.
Data Source
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AI summary
Embodiments include methods, performed by a user equipment (UE), for transmitting or receiving a plurality of physical data channels in a wireless network. Such methods include receiving, from the wireless network, an indication of a Transmission Configuration Indicator (TCI) state that includes one or more source reference signal (RS) pairs. Each source RS pair has a pair of quasi-colocation (QCL) relations with antenna ports, for demodulation reference signals (DM-RS), that are mapped to a plurality of code-division multiplexing (CDM) groups. Such methods include receiving/transmitting the physical data channels based on the QCL relations for the source RS pairs of the indicated TCI state. Each physical data channel corresponds to a CDM group and is received/transmitted in association with the DM-RS having antenna ports mapped to the corresponding CDM group. Other embodiments include complementary methods performed by a wireless network, and UEs and wireless networks configured to perform such methods.