Random Access Transmission via PUSCH Scrambling Parameter
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Solution Overview
Problem
In 5G mobile communications, uplink transmission failures occur during random access processes due to the network device's inability to detect uplink data packets sent by terminals in asynchronous states, leading to inefficiencies and increased power consumption.
Innovation Solution
A random access transmission method where a terminal obtains a data scrambling parameter for the physical uplink shared channel (PUSCH) and sends a random access message based on this parameter, ensuring the network device can decode the message correctly, thereby improving detection success rates and reducing unnecessary blind detection and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the terminal sends uplink data in an asynchronous state without achieving uplink timing synchronization, then resource consumption and power consumption are reduced, but the network device cannot successfully detect the data packets, resulting in uplink transmission failure
Solution Approach 1:
The terminal performs preliminary actions by obtaining uplink timing advance information through random access procedures before sending uplink data. The network device provides timing adjustment commands in advance to ensure the terminal can transmit data in synchronous state, guaranteeing detection success while avoiding continuous asynchronous retransmissions that would increase power consumption
Solution Approach 2:
The network device provides feedback in the form of timing advance commands to adjust the terminal's uplink transmission timing. This feedback mechanism enables the terminal to correct timing deviations and maintain synchronous transmission, ensuring reliable detection while optimizing power consumption by avoiding persistent asynchronous transmissions
2Measurement precision
If the network device performs blind detection to detect random access messages on PUSCH resources, then detection coverage is maintained, but detection complexity increases and detection success rate decreases
Solution Approach 1:
The patent introduces timing advance information as an intermediary element that mediates between the terminal and network device. The terminal obtains timing advance commands from the network device and uses them to adjust its transmission timing, creating a coordinated timing reference that eliminates the need for blind detection while ensuring accurate message detection
Solution Approach 2:
The system changes the timing parameter of uplink transmissions by providing timing advance commands to the terminal. This parameter adjustment transforms asynchronous transmissions into synchronous transmissions aligned with the network device's expected reception windows, thereby eliminating blind detection requirements and reducing detection complexity
Data Source
AI summary
The present disclosure discloses a random access transmission method and a terminal. The method includes: obtaining a data scrambling parameter of a physical uplink shared channel PUSCH; and sending a random access message based on the data scrambling parameter, where the random access message corresponds to the PUSCH and a physical random access channel PRACH. In a random access process of a terminal in embodiments of the present disclosure, a random access message is sent on a random access resource based on a data scrambling parameter of a PUSCH. Correspondingly, a network device decodes the PUSCH on the random access resource based on the data scrambling parameter, to obtain the corresponding random access message.