Maximum Deferral Time for Wireless Feedback Messages
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Solution Overview
Problem
In wireless communication systems, particularly in 5G and LTE networks, there is a challenge in managing feedback messages effectively due to changes in slot formats and dedicated grants, leading to collisions and inefficient resource utilization, where user equipment (UE) may defer feedback messages beyond practical times, causing scheduling issues and resource wastage.
Innovation Solution
Implementing a maximum deferral time mechanism, where both user equipment (UE) and base stations are informed of a maximum time to defer feedback messages, ensuring they are transmitted within this timeframe to prevent prolonged delays and resource accumulation, thereby conserving processing and signaling resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE defers feedback message transmission beyond scheduled time to avoid collisions, then feedback reliability is improved, but scheduling efficiency deteriorates and resource wastage increases
Solution Approach 1:
The patent introduces a maximum deferral time parameter that dynamically limits how long feedback messages can be postponed. This parameter change resolves the contradiction by allowing deferral only within bounded time windows, ensuring reliability improvement while preventing unlimited delays that would harm scheduling efficiency. The base station configures this parameter to balance collision avoidance with resource utilization.
2Reliability
If UE defers feedback messages indefinitely to ensure proper delivery, then feedback accuracy is improved, but time resources are wasted and processing burden increases
Solution Approach 1:
The base station performs preliminary action by configuring the maximum deferral time parameter before feedback transmission issues arise. This advance configuration enables the UE to make informed decisions about when to transmit feedback, preventing excessive delays while ensuring reliable delivery. The preliminary setup of time boundaries resolves the contradiction between ensuring delivery and minimizing delay.
3Productivity
If UE transmits feedback messages immediately at scheduled time, then scheduling efficiency is improved, but message collisions increase and feedback reliability deteriorates
Solution Approach 1:
The patent applies dynamics by making the feedback transmission timing flexible rather than fixed. The UE dynamically adjusts transmission time based on whether the scheduled slot is available, deferring only when necessary but within bounded limits. This dynamic approach resolves the contradiction by allowing immediate transmission when possible (maintaining efficiency) while permitting controlled deferral when needed (maintaining reliability).
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of a maximum deferral time for deferring transmission of a feedback message after receiving a physical downlink control channel (PDCCH) or physical downlink shared channel (PDSCH) communication. The UE may receive the PDCCH or PDSCH communication. The UE may transmit the feedback message for the PDCCH or PDSCH communication within the maximum deferral time if the feedback message is deferred beyond a scheduled time for transmission. Numerous other aspects are described.