Multi-Beam PUSCH Transmission for 5G Reliability
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Solution Overview
Problem
The reliability of physical uplink shared channel (PUSCH) transmission in 5G mobile communication systems is low due to the use of single-beam-based repetition transmission, which fails if the beam quality deteriorates or is blocked by obstacles.
Innovation Solution
Implementing a data transmission method that uses a plurality of beams for PUSCH repetition transmission by determining L sounding reference signal (SRS) resources with different spatial relations and performing Q PUSCH transmissions using these resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single-beam-based repetition transmission is used for PUSCH, then device complexity is reduced, but transmission reliability deteriorates
Solution Approach 1:
The patent segments the single transmission beam into multiple beams (first beam and second beam). Each beam carries a portion of the PUSCH repetition transmissions. This segmentation allows the system to maintain multiple transmission paths simultaneously, improving reliability without requiring a completely new complex transmission framework.
Solution Approach 2:
The patent introduces dynamic beam selection and switching mechanisms. The terminal device can dynamically choose which beam to use for transmission based on beam quality feedback from the network device. This dynamic adaptation allows the system to respond to changing channel conditions, maintaining reliability while managing complexity through adaptive rather than static configurations.
2Reliability
If multiple beams are used for PUSCH repetition transmission, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements preliminary beam establishment and quality assessment before actual PUSCH transmission. The network device pre-configures multiple beams and their corresponding SRS resources, and performs beam quality measurement and feedback in advance. This preliminary preparation reduces the complexity during actual transmission by having the beam selection criteria already established, rather than making complex decisions in real-time.
Solution Approach 2:
The patent implements a feedback mechanism where the network device measures the quality of each beam (using SRS resources associated with each beam) and provides feedback to the terminal device. This feedback guides the terminal's beam selection for PUSCH transmission. The feedback loop allows the system to maintain reliability through informed beam selection while managing complexity by using measured quality metrics rather than exhaustive search algorithms.
3Adaptability or versatility
If multiple SRS resources with different spatial relations are configured, then beam diversity is increased, but signaling overhead increases
Solution Approach 1:
The patent makes the SRS resources serve multiple functions. The same SRS resources are used both for beam management (measuring and evaluating beam quality) and for determining PUSCH transmission parameters. This multi-functionality reduces the need for separate dedicated resources for each purpose, thereby reducing signaling overhead while maintaining beam diversity through the universal SRS configuration.
Data Source
AI summary
A data transmission method, a device, a chip, and a readable storage medium are disclosed, to perform PUSCH repetition transmission by using a plurality of beams, and improve reliability of transmission. In embodiments of this application, a terminal device determines a plurality of SRS resources, the plurality of SRS resources correspond to a plurality of beams, and the terminal device performs many PUSCH repetition transmissions based on the plurality of beams, to improve reliability of the PUSCH repetition transmission.