Uplink Processing Techniques for Reduced Uplink Timelines
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Solution Overview
Problem
Wireless communication systems face challenges in reducing uplink timelines, particularly for high-priority communications like ultra-reliable, low-latency communications (URLLC), where conventional methods delay transmission due to processing overhead, preventing UEs from meeting latency requirements.
Innovation Solution
Initiating uplink transmission processing at the user equipment (UE) prior to receiving an uplink grant, using identified transmission parameters to prepare data packets at higher layers such as the MAC or RLC layer, and implementing shorter retransmission timelines to ensure successful transmission within a predetermined latency budget.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional uplink transmission methods are used, then processing overhead is reduced, but uplink timeline is extended and latency requirements cannot be met
Solution Approach 1:
The patent applies preliminary action by initiating uplink transmission processing at the UE before receiving the uplink grant. The UE prepares data packets at higher layers (MAC or RLC layer) in advance using identified transmission parameters, so that when the grant is received, transmission can occur with minimal additional processing time, thereby reducing the overall uplink timeline and latency.
2Productivity
If uplink transmission processing is initiated prior to receiving uplink grant, then uplink timeline is reduced, but processing resource requirements increase
Solution Approach 1:
The UE performs preliminary processing of uplink data packets before receiving the uplink grant, preparing them at the MAC or RLC layer using identified transmission parameters. This advance preparation enables faster transmission when the grant is received, improving productivity while managing processing resources through efficient pre-processing rather than intensive real-time processing.
3Loss of time
If shorter retransmission timelines are implemented, then latency budget is met, but reliability requirements become more challenging
Solution Approach 1:
The patent applies preliminary action by preparing data packets in advance before the uplink grant is received. This pre-processing ensures that when retransmission is needed, the UE can quickly retransmit the already-prepared data within the shorter retransmission timeline, meeting latency requirements while maintaining reliability through the use of predetermined transmission parameters and efficient resource allocation.
Data Source
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AI summary
Methods, systems, and devices for wireless communications are described in which uplink timelines may be reduced by initiating, at a user equipment (UE), uplink transmission processing prior to receipt of an uplink grant for an uplink communication. A UE may identify one or more uplink transmission parameters associated with a reduced uplink transmission timeline for an uplink communication, and use the uplink transmission parameters to initiate processing of the uplink communication prior to receiving an uplink grant from a base station. The uplink transmission parameters may allow for packet preparation at a higher layers (e.g., at a medium access control (MAC) layer or radio link control (RLC) layer) to be started or completed prior to receipt of the uplink grant.