Multiple Access Signatures for Wireless Data Transmission
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Solution Overview
Problem
In communications systems, particularly in scenarios involving enhanced mobile broadband (eMBB) and ultra-reliable low latency communications (URLLC), simultaneous data transmission from eMBB and URLLC terminal devices on the same physical resource leads to interference, making it difficult for network devices to detect data accurately, resulting in poor data transmission performance.
Innovation Solution
The use of different demodulation reference signals (DMRS) and preamble sequences for each terminal device allows the network device to jointly detect and improve data transmission by employing distinct multiple access signatures (MAS) for eMBB and URLLC devices, enabling better differentiation and reception of data on shared resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If eMBB and URLLC terminal devices simultaneously send data on the same physical resource, then resource utilization is improved, but data transmission reliability deteriorates due to detection difficulty
Solution Approach 1:
The patent segments the data transmission by dividing terminal devices into different groups (first group for eMBB, second group for URLLC) and assigns different multiple access signatures to each group. This segmentation allows simultaneous transmission on the same physical resource while maintaining detectability through distinct signature characteristics.
Solution Approach 2:
The patent applies local quality by assigning different types of multiple access signatures to different terminal device groups. Specifically, the first group uses a first type of MAS while the second group uses a second type of MAS, creating locally differentiated transmission characteristics that enable reliable detection despite shared physical resources.
2Measurement precision
If different multiple access signatures are used for eMBB and URLLC devices, then data detection accuracy is improved, but system complexity increases
Solution Approach 1:
The patent employs a universal multiple access signature structure that can serve multiple functions. The same MAS framework is used for both eMBB and URLLC devices, with only the specific signature parameters differing. This universal approach maintains system simplicity while enabling differentiated detection through parameter variation rather than structural complexity.
Data Source
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AI summary
Embodiments of this application disclose a data transmission method. The method includes: receiving, by a network device, first data sent by a first terminal device on a multiplexing resource, where the first data is generated based on a first multiple access signature MAS; receiving, by the network device, second data sent by a second terminal device on the multiplexing resource, where the second data is generated based on a second MAS, and the first MAS and the second MAS include different demodulation reference signals DMRSs and/or different preamble sequences; and detecting, by the network device based on the first MAS and the second MAS, the first data and the second data that are sent on the multiplexing resource. Therefore, data transmission performance can be improved.