Distributed MIMO Control Information for Non-QCL Site Identification
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Solution Overview
Problem
Current systems fail to indicate multiple non-quasi-co-location base stations transmitting data to a terminal in distributed MIMO scenarios, limiting the terminal's ability to receive data from these sites.
Innovation Solution
A method and apparatus that generate and send control information with multiple site indication messages to the terminal, allowing it to identify and receive data from non-quasi-co-location sites, including transmission parameter and port number information, enabling data reception from multiple non-quasi-co-location sites.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If distributed MIMO is introduced with multiple non-QCL base stations, then system capacity and coverage are improved, but the terminal cannot identify which base stations are transmitting data
Solution Approach 1:
The patent segments the control information by introducing separate site indication messages for each non-QCL base station. Each site indication message independently identifies a specific base station, allowing the terminal to distinguish and identify multiple transmitting base stations simultaneously. This segmentation resolves the information loss problem while maintaining the high capacity benefits of distributed MIMO.
Solution Approach 2:
The patent introduces site indication messages as intermediary elements between the base stations and the terminal. These messages serve as mediators that carry identification information about which base stations are transmitting data, enabling the terminal to correctly identify and process signals from multiple non-QCL base stations without direct interaction between the base stations and terminal identification processes.
2Device complexity
If only one group of QCL parameters is configured in DCI format 2D, then control information structure is simple, but the terminal can receive PDSCH from only one base station
Solution Approach 1:
The patent makes the control information structure universal by introducing site indication messages that can indicate multiple base stations. The same control information format (DCI) can now serve multiple functions: it can indicate one base station or multiple base stations depending on the distributed MIMO configuration, enhancing adaptability while maintaining structural consistency.
Solution Approach 2:
The patent introduces dynamic flexibility into the control information structure through site indication messages. The number and content of site indication messages can dynamically adjust based on how many non-QCL base stations are transmitting, allowing the system to adapt between single-base-station and multi-base-station scenarios without changing the fundamental control information framework.
Data Source
AI summary
A data transmission method and apparatus are provided. The method includes: receiving control information from a network side device, wherein the control information comprises transmission parameter indication information, wherein the transmission parameter indication information is used to indicate a quantity of transport layers for at least two codewords and port numbers of ports for the at least two codewords; and determining, based on the transmission parameter indication information, a quantity of transport layers for at least two codewords and port numbers of ports for the at least two codewords, wherein ports used by different codewords of the at least two codewords are non-quasi-co-location, and ports used by one codeword of the at least two codewords are quasi-co-location when the codeword has more than one port.