Multi-TRP Scheduling Collision Backoff for Higher Throughput
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Solution Overview
Problem
Existing wireless communication systems face challenges in handling scheduling collisions between multiple transmit receive points (TRPs) due to overlapping communications, leading to inefficiencies in throughput and increased latency.
Innovation Solution
Allowing scheduling collisions between TRPs and enabling TRPs to back off from transmissions when necessary, using a configured backoff window or random backoff value, to manage overlapping communications and optimize resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple TRPs transmit scheduled communications simultaneously, then resource utilization increases, but scheduling collisions occur causing throughput degradation and increased latency
Solution Approach 1:
The system implements feedback mechanisms where TRPs monitor for scheduling collisions and exchange collision indication messages. When a collision is detected, the involved TRPs receive feedback about the collision event and adjust their transmission schedules accordingly, enabling dynamic adaptation to resolve the contradiction between resource utilization and collision-free operation
Solution Approach 2:
The patent introduces dynamic backoff mechanisms where TRPs can adjust their transmission timing based on detected collisions. The backoff duration and behavior are not fixed but adapt dynamically based on collision patterns, allowing the system to optimize between aggressive resource utilization and collision avoidance in real-time conditions
2Reliability
If TRPs avoid scheduling collisions through strict coordination, then transmission reliability improves, but resource utilization and throughput decrease
Solution Approach 1:
The system changes the parameter of collision handling from binary (avoid or collide) to a continuous spectrum by introducing configurable backoff windows and probabilistic backoff factors. This allows TRPs to adjust their behavior based on traffic conditions, prioritizing reliability when necessary while maximizing resource utilization when conditions permit
Solution Approach 2:
Instead of requiring complete coordination between all TRP pairs, the system applies partial coordination only when collisions are detected or predicted to be harmful. This selective approach allows most TRPs to operate independently and maximize resource utilization, while applying coordination only where necessary to maintain reliability
3Reliability
If TRPs implement collision detection and backoff mechanisms, then scheduling collision handling improves, but signaling overhead and latency increase
Solution Approach 1:
The system performs preliminary actions by pre-configuring backoff parameters, windows, and behaviors before collisions occur. TRPs are pre-programmed with collision handling strategies, so when a collision is detected, they can execute predetermined backoff actions immediately without extensive negotiation or calculation, reducing the time loss from collision recovery
Solution Approach 2:
The collision handling process is segmented into distinct phases: detection phase, indication phase, and backoff execution phase. This segmentation allows each phase to be optimized independently, with fast detection mechanisms, efficient indication messaging, and rapid backoff execution, minimizing the total time loss while maintaining reliable collision handling
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first transmit receive point (TRP) may receive an indication of a detection of a scheduling collision of a first scheduled communication of a first scheduling message from the first TRP and a second scheduled communication of a second scheduling message from a second TRP. The first TRP may back off from transmitting the first scheduled communication based at least in part on the indication. Numerous other aspects are described.