HARQ Process Partitioning for Multi-TRP Wireless Communication
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE and NR technologies, face challenges in efficiently managing hybrid automatic repeat request (HARQ) processes across multiple base stations and user equipment, leading to suboptimal performance in multi-TRP communication scenarios due to limitations in resource allocation and error handling.
Innovation Solution
Implementing HARQ process partitioning by mapping sets of HARQ processes to corresponding types, allowing user equipment to configure and manage HARQ processes based on received indications, and enabling base stations to select appropriate HARQ processes for communication, thereby improving resource utilization and error handling in multi-TRP environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ processes are managed without partitioning in multi-TRP scenarios, then device complexity is reduced, but communication reliability deteriorates due to suboptimal resource allocation and error handling
Solution Approach 1:
The patent applies segmentation by dividing the HARQ process space into multiple partitions, where each partition is associated with a specific TRP. This allows independent management of HARQ processes for different TRPs, improving communication reliability in multi-TRP scenarios while maintaining manageable complexity through structured organization
2Productivity
If HARQ processes are partitioned and mapped to different TRPs, then communication efficiency improves through optimized resource allocation, but device complexity increases due to additional configuration and management overhead
Solution Approach 1:
The HARQ process space is segmented into multiple partitions, each associated with a specific TRP. This segmentation enables optimized resource allocation for each TRP independently, improving communication efficiency while the structured partitioning approach keeps the increased complexity manageable through clear organization
Solution Approach 2:
The network configures the HARQ process partitions and associations with TRPs in advance through RRC signaling. This preliminary configuration allows the UE to efficiently manage HARQ processes during data transmission without real-time decision complexity, improving communication efficiency while managing configuration overhead
3Loss of information
If multiple HARQ processes are managed without type differentiation, then ease of operation is maintained, but loss of information increases due to insufficient error handling capabilities in multi-TRP scenarios
Solution Approach 1:
The patent applies local quality by introducing HARQ process types that provide differentiated error handling capabilities for different TRPs. Each HARQ process type is associated with specific error handling parameters and retransmission strategies, reducing information loss in multi-TRP scenarios while maintaining ease of operation through automated type-based management
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an indication of a mapping between a plurality of sets of hybrid automatic repeat request (HARQ) processes and a corresponding plurality of HARQ process types. The UE may configure one or more HARQ processes of the UE based at least in part on the indication. In some aspects, a base station may transmit, to a UE, an indication of a mapping between a plurality of sets of HARQ processes and a corresponding plurality of HARQ process types. The base station may select a HARQ process, of the plurality of HARQ processes, to be used for a communication with the UE based at least in part on the mapping. Numerous other aspects are provided.