Multi-PDSCH HARQ Timing and SLIV Conflict Resolution
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing conflicts between the timing of uplink feedback communications and time domain resource allocations for multiple downlink communications, leading to inefficiencies and potential interference.
Innovation Solution
A method and apparatus for wireless communication that adjusts time domain resource allocations (TDRA) and uplink feedback timing based on detected conflicts, using start and length indicator values (SLIVs) and feedback timing indicators to resolve scheduling conflicts in multi-PDSCH grants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple downlink communications are scheduled using multi-PDSCH grant, then resource utilization efficiency is improved, but scheduling conflicts between uplink feedback and downlink communications occur
Solution Approach 1:
The patent applies preliminary action by determining TDRA adjustments before transmitting downlink communications. The base station identifies potential conflicts between uplink feedback and downlink communications in advance, adjusts TDRA parameters proactively, and then transmits the communications. This prevents scheduling conflicts from occurring rather than resolving them after they arise, thereby maintaining both high resource utilization and reliable conflict-free scheduling.
2Reliability
If TDRA is adjusted to avoid scheduling conflicts, then uplink feedback reliability is improved, but scheduling flexibility is reduced
Solution Approach 1:
The patent applies dynamics by making TDRA adjustable rather than fixed. The base station dynamically determines TDRA parameters based on real-time detection of scheduling conflicts between uplink feedback and downlink communications. When conflicts are detected, the TDRA is adjusted to resolve them; when no conflicts exist, the original flexible scheduling is maintained. This dynamic approach preserves scheduling flexibility while ensuring uplink feedback reliability.
3Reliability
If conflict detection and adjustment mechanisms are implemented, then communication reliability is improved, but system complexity increases
Solution Approach 1:
The patent applies self-service by enabling the base station to autonomously detect scheduling conflicts and adjust TDRA parameters without external intervention. The base station's processor automatically identifies conflicts between uplink feedback and downlink communications, determines appropriate TDRA adjustments, and implements the corrections. This self-service mechanism improves communication reliability through automated conflict resolution while minimizing the need for additional system infrastructure or manual configuration.
Data Source
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AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a grant that schedules multiple downlink communications, wherein the grant includes multiple start and length indicator values (SLIVs) that indicate respective time domain resource allocations (TDRAs) for the multiple downlink communications and a feedback timing indicator that indicates timing of uplink feedback communications for the multiple downlink communications. The UE may determine that there is a conflict between a timing of a first uplink feedback communication for a first downlink communication of the multiple downlink communications and a TDRA for a second downlink communication of the multiple downlink communications. The UE may adjust at least one of the TDRA for the second downlink communication or the timing of the first uplink feedback communication. Numerous other aspects are provided.