Uplink Transmission Bundle Shift to Handle Configured-Grant Jitter
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in managing uplink transmission bundles due to alignment issues with configured grants, leading to resource wastage and inefficient use of transmission occasions, particularly in scenarios with uplink jitter and repetition of transport blocks.
Innovation Solution
A user equipment (UE) indicates a shift value or offset to adjust the transmission of uplink bundles based on uplink jitter, allowing transmission to occur at non-initial occasions and efficiently utilize unused transmission occasions through UTO-UCI, aligning with actual rather than logical bundles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE transmits the bundle of repetitions using the logical bundle of transmission occasions, then the transmission is aligned with the configured grant, but the UE cannot transmit when the bundle is ready due to uplink jitter
Solution Approach 1:
The patent introduces a shift value mechanism that dynamically adjusts the transmission bundle alignment based on actual uplink readiness. Instead of fixed logical bundle alignment, the UE can shift the transmission bundle to start at different positions (first transmission occasion, second transmission occasion, or third transmission occasion) depending on when the bundle is ready, resolving the contradiction between alignment and flexibility.
2Reliability
If the UE waits for the next aligned transmission occasion, then the transmission is synchronized with the configured grant, but transmission resources are wasted during the waiting period
Solution Approach 1:
The patent enables preliminary transmission by allowing the UE to indicate readiness and transmit the bundle before the next logical bundle alignment point. The shift value mechanism permits the UE to start transmission at the first available occasion rather than waiting for the next aligned occasion, eliminating idle waiting time and resource wastage while maintaining synchronization through the shift indication.
3Productivity
If the UE uses the first transmission occasion for the bundle, then the transmission is efficient, but the UE cannot accommodate uplink jitter and may lose data
Solution Approach 1:
The patent changes the transmission timing parameter by introducing a shift value that can take multiple values (first transmission occasion, second transmission occasion, or third transmission occasion). This parameter change allows the UE to adapt the transmission start time based on uplink jitter conditions, ensuring both efficiency (by transmitting as soon as ready) and reliability (by accommodating jitter without data loss).
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a first control signal indicating parameters for a configured grant and a repetition factor or quantity of slots for a transport block of uplink data associated with the configured grant. The UE may transmit, via an uplink resource during a first transmission occasion of the configured grant, a second control signal indicative of a shift value for a bundle of repetitions or slots of the transport block within a first set of transmission occasions based on an uplink jitter of the bundle. The second control signal may indicate sets of unused transmission occasions based on the shift value and either the repetition factor or quantity of slots. The UE may transmit the bundle using the first set and a second set of transmission occasions according to the shift value.