Wireless Downlink Layer Group Mapping for Multi-Point Transmission
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Solution Overview
Problem
Current wireless communication systems face challenges in supporting high-speed data transmission, accommodating a large number of connected devices, and achieving low latency and high energy efficiency, particularly in next-generation mobile communication systems.
Innovation Solution
The method involves mapping multiple time units and multiple TCI states or QCL reference signals for transmitting and receiving downlink data through multiple transmission points, allowing for the transmission and reception of downlink data across different transmission points and layer groups, with each layer group determined based on a predefined rule and transmission rank.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transmission points are used to transmit downlink data, then communication reliability and data rate are improved, but system complexity and resource management difficulty increase
Solution Approach 1:
The patent segments the downlink data transmission by dividing layers into different layer groups (first layer group and second layer group), each associated with different transmission points. This segmentation allows the system to manage multiple transmission points independently through separate layer groups, improving reliability while controlling complexity through structured division.
Solution Approach 2:
The patent introduces a new dimension of layer grouping to manage transmission points. By associating different layer groups with different transmission points and configuring TCI states at the layer group level rather than individual layer level, the system adds a management dimension that handles multi-point transmission complexity systematically.
2Adaptability or versatility
If multiple TCI states are configured for multiple layer groups, then transmission flexibility and adaptability are improved, but configuration complexity and signaling overhead increase
Solution Approach 1:
The patent merges the configuration of multiple TCI states by associating them with layer groups rather than individual layers. Each layer group can be configured with multiple TCI states, allowing the system to manage transmission flexibility at the group level, reducing configuration complexity while maintaining adaptability.
Solution Approach 2:
The layer group structure serves multiple functions: it groups layers for transmission point association, manages TCI state configurations, and enables flexible mapping between layer groups and transmission points. This multi-functionality reduces overall system complexity while maintaining transmission flexibility.
3Productivity
If downlink data is transmitted across multiple time units and transmission points, then data rate and communication efficiency are improved, but latency and scheduling complexity increase
Solution Approach 1:
The patent performs preliminary configuration of layer groups and their associations with transmission points and TCI states before actual data transmission. This preliminary setup enables efficient scheduling across multiple time units and transmission points, improving communication efficiency while reducing latency by avoiding real-time decision complexity.
Data Source
AI summary
The present specification provides a method for transmitting and receiving downlink data in a wireless communication system and a device for same. In particular, the method carried out by a terminal may comprise the steps of: receiving downlink control information for scheduling the downlink data in a first time unit and a second time unit; receiving information on mappings between layer groups and transmission configuration indication (TCI) states; receiving downlink data, which is related to a first layer group, in the first time unit on the basis of a first TCI state; receiving downlink data, which is related to a second layer group, in the first time unit on the basis of a second TCI state; and receiving downlink data, which is related to a third layer group, in the second time unit on the basis of a third TCI state.