Uplink Transmission Timing Adjustment for NR-U Processing Delays
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Solution Overview
Problem
In New Radio (NR)-based access to unlicensed spectrum, terminal devices face challenges when the start position of uplink transmission indicated by the network device occurs before a valid uplink transmission resource, leading to uncertainty about how to perform the transmission.
Innovation Solution
The method involves determining the start position of the uplink channel and assessing whether a processing delay is satisfied, based on the start position and processing capability of the terminal device, to enable valid uplink transmission. This includes using specific processing times and parameters like C and Δ to determine if the uplink channel can be transmitted effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the network device schedules uplink transmission start position before valid uplink transmission resource, then the uplink transmission timing is optimized for network control, but the terminal device cannot perform valid transmission due to insufficient processing time
Solution Approach 1:
The terminal device performs preliminary actions by determining the start position of the uplink channel and assessing processing delay satisfaction before actual transmission. The device checks whether the time from receiving uplink grant to uplink transmission start meets the required processing capability, and prepares appropriate uplink data or null data accordingly, ensuring transmission validity is maintained while adhering to network-scheduled timing.
2Reliability
If the terminal device waits for valid uplink transmission resource after network scheduling, then transmission validity is ensured, but transmission delay increases and communication efficiency deteriorates
Solution Approach 1:
The terminal device autonomously determines whether the processing delay is satisfied by comparing the time between receiving uplink grant and uplink transmission start against its processing capability. Based on this self-assessment, the device independently decides whether to perform uplink transmission and what data to transmit, eliminating the need to wait for additional network confirmation while ensuring transmission validity.
3Speed
If the terminal device transmits without checking processing delay, then transmission timing is maintained, but transmission may be invalid due to insufficient processing time
Solution Approach 1:
The terminal device implements a feedback mechanism by determining whether the processing delay is satisfied based on the start position of the uplink channel and its processing capability. This internal assessment provides feedback that guides the transmission decision: if processing delay is satisfied, the device transmits uplink data; otherwise, it transmits null data or performs no transmission, ensuring validity while maintaining network-scheduled timing.
Data Source
AI summary
The present disclosure provides an uplink transmission method, an electronic device, and a storage medium. The method includes: determining, by a terminal device, a start position of an uplink channel; and determining, by the terminal device, a transmission of the uplink channel based on whether a processing delay is satisfied. Whether the processing delay is satisfied is dependent on the start position of the uplink channel and/or a processing capability of the terminal device.