PUSCH Transmission in Uplink Pilot Time Slot via Dynamic Timing
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting a physical uplink shared channel (PUSCH) during an uplink pilot time slot (UpPTS), particularly in terms of scheduling timing and differentiating uplink grants, which affects communication reliability and latency reduction capabilities.
Innovation Solution
The techniques involve selecting appropriate timing for transmitting scheduling information for PUSCH in UpPTS based on user equipment (UE) capabilities, differentiating uplink grants, and managing hybrid automatic repeat request (HARQ) processes to optimize communication efficiency and reduce latency, while also determining whether to transmit uplink control information (UCI) on the PUSCH.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PUSCH is transmitted in UpPTS, then uplink data transmission capability is improved, but scheduling timing complexity increases
Solution Approach 1:
The patent segments the scheduling timing into distinct cases based on UE capability (first timing for UEs capable of shorter processing, second timing for others). This segmentation allows the system to optimize for advanced UEs without forcing complex scheduling on all devices, resolving the contradiction between improved productivity and reduced complexity.
Solution Approach 2:
The patent implements dynamic timing selection where the scheduling timing is adapted based on UE capability indicators. The system dynamically chooses between first and second timing configurations, allowing flexibility to improve uplink data transmission when possible while falling back to more robust timing when needed, thus balancing productivity and complexity.
2Loss of time
If scheduling timing is shortened to reduce latency, then communication latency is reduced, but scheduling information transmission reliability deteriorates
Solution Approach 1:
The patent changes the timing parameter based on UE capability. For UEs with advanced processing capability, a shorter first timing is used to reduce latency. For UEs with standard capability, a longer second timing is used to ensure reliable reception and processing of scheduling information. This parameter adaptation resolves the contradiction between latency reduction and reliability maintenance.
3Productivity
If uplink grants are differentiated to optimize resource allocation, then resource allocation efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by providing different scheduling timing treatments to different UE groups based on their capabilities. Advanced UEs receive optimized first timing configurations while standard UEs receive conventional second timing configurations. This localized differentiation improves overall resource allocation efficiency without requiring all devices to handle complex scheduling logic.
4Reliability
If HARQ processes are optimized for UpPTS transmissions, then uplink transmission reliability is improved, but processing complexity increases
Solution Approach 1:
The patent implements preliminary action by having UEs indicate their capability to handle shorter scheduling timing in advance. This capability indication allows the network to pre-determine appropriate timing configurations, enabling optimized HARQ processes for capable UEs without requiring complex real-time processing decisions, thus improving reliability while managing processing complexity.
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AI summary
A method for wireless communication at a user equipment, UE (115), as well as for a base station (105) are described. Furthermore, the respective apparatuses are described. The method at the UE (115) comprises receiving an uplink grant for a physical uplink shared channel, PUSCH, in an uplink pilot time slot, UpPTS (340), and an uplink grant for uplink transmission in an uplink subframe in a same transmission time interval, TTI, differentiating between the uplink grants based on a downlink control information, DCI, format, identifying the uplink grant for the PUSCH in the UpPTS (340) based on the differentiation, determining a transmission time interval for the PUSCH in the UpPTS (340) based on the identified uplink grant and transmitting the PUSCH in the UpPTS (340) based at least in part on the identified uplink grant.