Multi-Beam Data Transmission via Consolidated DCI Scheduling
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Solution Overview
Problem
In 5G high-frequency communication systems, the short transmission distance and susceptibility to obstacles of high-frequency signals lead to inefficient data transmission, particularly due to the need for frequent DCI resource usage, which limits the number of terminal devices that can be supported and affects cell data transmission performance.
Innovation Solution
A data transmission method where a network device sends first information indicating transmission parameters required for multiple data transmissions to a terminal device, allowing the terminal to receive data using these parameters without the need for DCI indication for each transmission, thereby reducing DCI resource usage and improving performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If one piece of DCI is used each time the network device sends the to-be-transmitted data to the terminal device, then the transmission parameters can be correctly indicated for each data transmission, but DCI resources are wasted and the quantity of terminal devices that can be scheduled is limited
Solution Approach 1:
The patent merges multiple DCI indications into a single DCI message that carries transmission parameters for multiple data transmissions. Instead of sending separate DCI for each data transmission, the network device consolidates the control information, allowing one DCI to schedule multiple PDSCH receptions with different transmission parameters such as TCI states, time-frequency resources, and HARQ process numbers.
Solution Approach 2:
The patent makes a single DCI message perform multiple functions by enabling it to indicate transmission parameters for multiple different data transmissions. The DCI structure is designed to universally cover various transmission scenarios including different beams, time slots, and frequency resources, allowing one DCI to replace multiple specialized DCI messages.
2Reliability
If multiple beams are used for multi-beam polling transmission to overcome obstacle blocking, then data transmission reliability is improved, but the quantity of terminal devices that can be scheduled is limited due to DCI resource constraints
Solution Approach 1:
The patent combines multiple beam scheduling operations into a single DCI message, allowing the network device to schedule multiple terminal devices using different beams simultaneously. This merging of scheduling operations enables multi-beam polling transmission to serve more terminal devices without proportionally increasing DCI resource consumption.
Solution Approach 2:
The patent introduces a new dimension to DCI functionality by enabling a single DCI to schedule multiple PDSCH receptions across different time-frequency-beam dimensions. The DCI structure incorporates multiple TCI states, time-domain resource allocations, and frequency-domain resource allocations, allowing scheduling in multiple dimensions simultaneously rather than sequentially.
Data Source
AI summary
This application discloses a data transmission method and apparatus, the method comprising: sending first information to a terminal device, wherein the first information indicates at least two transmission configuration indicator (TCI)-states; sending a radio resource control (RRC) signaling to the terminal device, wherein the RRC signaling configures a total quantity of transmission times that a same transport block (TB) is to be transmitted in different time units; and sending the same TB in each time unit of the different time units using the at least two TCI-states, wherein a time interval is between two adjacent time units in which the same TB is transmitted.