Semi-Static HARQ Codebook Scheduling for TDD Wideband Gaps
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face inefficiencies in power consumption and HARQ feedback due to scheduling wideband communications with deterministic gaps, leading to unnecessary HARQ feedback during unscheduled time periods.
Innovation Solution
Implementing a time division duplexing (TDD) pattern with defined periods for wideband communication scheduling and HARQ feedback, where the UE transmits a semi-static feedback codebook that includes feedback for scheduled periods and omits feedback for unscheduled periods, allowing for baseband processing during these gaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wideband communication scheduling is performed continuously without gaps, then communication throughput is improved, but power consumption increases due to continuous UE operation
Solution Approach 1:
The patent implements periodic wideband communication scheduling with deterministic gaps between scheduling opportunities. The UE is scheduled for wideband communication only during specific time periods (first time period) and remains unscheduled during other periods (second time period), allowing the UE to enter lower power states during gaps while maintaining communication throughput during active scheduling periods
2Reliability
If HARQ feedback is transmitted for all scheduling opportunities including unscheduled periods, then feedback completeness is improved, but unnecessary feedback transmission increases power consumption
Solution Approach 1:
The patent extracts and removes the unnecessary portion of HARQ feedback transmission by configuring the UE to transmit feedback codebooks only during scheduled wideband communication periods. The feedback codebook is configured to include feedback information only for the first time period when wideband communication is scheduled, omitting feedback for the second time period when no wideband communication occurs, thereby eliminating wasteful feedback transmissions
3Reliability
If the UE operates at high power level continuously for wideband communication, then communication quality is improved, but baseband processing efficiency decreases due to insufficient processing time
Solution Approach 1:
The patent implements periodic scheduling with deterministic gaps that provide dedicated baseband processing time. The TDD pattern configures specific time periods where wideband communication occurs followed by gaps where the UE can perform baseband processing at lower power levels, ensuring sufficient processing time while maintaining communication quality during active periods
Solution Approach 2:
The patent applies preliminary action by configuring the TDD pattern and feedback codebook in advance through control signaling. The UE is pre-configured with the TDD pattern parameters and feedback codebook structure before communication begins, allowing the UE to prepare processing routines and transition between power states efficiently without real-time decision delays
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive control signaling that indicates a set of parameters for wideband communication with the UE in accordance with a time division duplexing (TDD) pattern, the TDD pattern comprising a first time period during which scheduling the UE for wideband communication is available and a second time period during which scheduling the UE for wideband communication is not available. The UE may monitor for a wideband communication scheduled for the first time period in accordance with the set of parameters. The UE may transmit a semi-static feedback codebook associated with the wideband communication based on a result of the monitoring, wherein the semi-static feedback codebook includes feedback information for the wideband communication scheduled for the first time period and omits feedback information for the second time period.