HARQ Feedback Resource Allocation for Collision Avoidance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional techniques for providing hybrid automatic repeat request (HARQ) feedback in wireless communications systems are deficient in avoiding collisions between HARQ feedback transmissions and between HARQ feedback transmissions and other transmissions.
Innovation Solution
The described techniques configure resources for HARQ feedback transmissions to be exclusive of each other, allowing a base station to indicate specific resource sets for user equipment (UE) to use for HARQ feedback, thereby avoiding collisions. If overlapping resources are detected, the UE may multiplex bits of the HARQ feedback transmission with other transmissions or drop the other transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If multiple HARQ feedback transmissions are scheduled in the same time slot, then the feedback latency is reduced, but collisions between feedback transmissions occur
Solution Approach 1:
The patent segments the time slot into multiple non-overlapping resource sets for different HARQ feedback transmissions. Each feedback transmission is assigned a dedicated time-frequency resource set that does not collide with others, allowing multiple feedback transmissions within the same slot while maintaining reliability through resource isolation.
2Adaptability or versatility
If HARQ feedback resources are allocated dynamically, then the system adaptability is improved, but the complexity of resource management increases
Solution Approach 1:
The patent establishes predetermined rules and configurations for HARQ feedback resource allocation before actual transmissions occur. The base station configures multiple resource sets in advance with defined time-frequency structures, and the UE follows predefined selection criteria based on received data, reducing the need for complex real-time negotiation and management while maintaining adaptability.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. Generally, the described techniques provide for avoiding collisions between hybrid automatic repeat request (HARQ) feedback transmissions and between HARQ feedback transmissions and other transmissions. In one example, a base station may configure resources for HARQ feedback transmissions such that the resources are exclusive of each other to avoid collisions between HARQ feedback transmissions. In another example, a base station may indicate resources for a user equipment (UE) to use for HARQ feedback transmissions such that the resources are exclusive of each other to avoid collisions between HARQ feedback transmissions. In yet another example, if a HARQ feedback transmission and another transmission are scheduled on overlapping resources, a UE may be configured to multiplex bits of the HARQ feedback transmission and the other transmission or drop the other transmission.