Data Transmission Method and Apparatus
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Solution Overview
Problem
In mobile communication systems like 5G NR, the challenge is to support multiple secondary terminals in simultaneous uplink data transmission using time-frequency resources allocated to a primary terminal, limiting the number of devices that can be connected due to constraints on orthogonal DMRS ports and beam directions.
Innovation Solution
A method where a first terminal apparatus determines a part of the time-frequency resource used by a second terminal apparatus for uplink data transmission, allowing multiple terminals to share the same resource without affecting performance, through techniques such as frequency hopping and RV management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single terminal uses all time-frequency resources for uplink transmission, then transmission performance is maintained, but the quantity of supported terminals is limited
Solution Approach 1:
The patent segments the time-frequency resources allocated to a primary terminal into multiple parts, allowing different secondary terminals to use different segments for their uplink transmissions. This segmentation enables multiple terminals to share the overall resource pool while each terminal uses only a portion, thereby increasing the quantity of supported terminals without compromising individual transmission performance.
Solution Approach 2:
The patent introduces a new dimension of resource allocation by allowing multiple secondary terminals to share the primary terminal's time-frequency resources through orthogonal DMRS ports and sequences. This dimensional approach enables resource multiplexing in the code domain, effectively increasing system capacity without reducing the resources available to any single terminal.
2Quantity of substance
If multiple terminals share the same time-frequency resources, then system capacity increases, but resource allocation complexity increases
Solution Approach 1:
The patent enables secondary terminals to autonomously determine their resource allocations by monitoring uplink grant information intended for primary terminals and independently identifying suitable time-frequency resources and orthogonal DMRS ports. This self-service mechanism eliminates the need for the network to individually configure resources for each secondary terminal, thereby increasing system capacity without proportionally increasing allocation complexity.
Solution Approach 2:
The patent establishes predetermined rules and criteria that secondary terminals use to select time-frequency resources and orthogonal DMRS ports before actual transmission occurs. These preliminary determinations simplify real-time resource allocation by allowing terminals to autonomously make decisions based on pre-defined parameters, reducing the complexity of dynamic resource management.
Data Source
AI summary
A data transmission method includes a first terminal apparatus that obtains a first time-frequency resource. The first time-frequency resource is used by a second terminal apparatus to transmit first uplink data. The first time-frequency resource is based on first uplink grant information of the second terminal apparatus. The first terminal apparatus sends second uplink data on a second time-frequency resource. The second time-frequency resource is a part of the first time-frequency resource.