Adaptive Feedback Timing for UE Processing Capability

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Solution Overview

Problem

In LTE systems, shortening the processing duration in User Equipment (UE) renders existing feedback timing information for downlink data inapplicable, impacting user-plane delay performance.

Innovation Solution

Determine the processing capability of UE to adjust feedback timing information, allowing for timely feedback on downlink data retransmission, even when processing duration is shortened, by using new feedback timing information specific to the UE's processing capability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If the processing duration in UE is shortened to improve user-plane delay performance, then the user-plane delay is reduced, but the existing feedback timing information becomes inapplicable

Engineering Contradiction:

Improveuser-plane delayVSAvoidfeedback timing information applicability

Core Design Contradiction:

Loss of timeVSAdaptability or versatility

Solution Approach 1:

The patent introduces dynamic feedback timing information that adapts to different UE processing capabilities. Instead of using fixed feedback timing, the system dynamically determines appropriate feedback timing based on the UE's actual processing duration, allowing the feedback mechanism to remain applicable even when processing durations vary.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the feedback timing parameter from a fixed value to a variable that depends on UE processing capability. By introducing processing capability-based feedback timing, the system allows feedback timing to be adjusted according to different processing durations, maintaining applicability across various processing speeds.

Inventive Principle:

Principle #35Parameter changes

2Loss of time

If the processing duration in UE is shortened to improve user-plane delay performance, then the user-plane delay is reduced, but the feedback timing information and implicit PUCCH resource indication become inapplicable

Engineering Contradiction:

Improveuser-plane delayVSAvoidfeedback timing information

Core Design Contradiction:

Loss of timeVSLoss of information

Solution Approach 1:

The patent transforms the feedback timing from a fixed parameter to a dynamic parameter based on UE processing capability. This allows the feedback timing to be recalculated according to the actual processing duration, preventing information loss when processing speeds change.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements a feedback mechanism where the UE reports its processing capability, and the network adjusts feedback timing accordingly. This closed-loop feedback ensures that timing information remains accurate and applicable even as processing durations are shortened.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS10911205B2Method and device for feeding back downlink data

Publication Date: 2021.02.02 DATANG MOBILE COMM EQUIP CO LTD

AI summary

Disclosed in the present application are a method and device for feeding back downlink data. When a processing duration of an UE is shortened, feedback timing information for feeding back downlink data may be adaptively changed. The method comprises: determining a processing capability of an UE, the processing capability referring to a processing duration that the UE takes to process the received downlink data to determine whether said downlink data needs to be retransmitted; according to the determined processing capability, determining the feedback timing information of the UE feeding back the downlink data.