HARQ Process Identifier Determination for Multi-TRP Scheduling
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Solution Overview
Problem
In wireless communication systems, particularly in multi-transmit receive point (multi-TRP) configurations, user equipment (UE) faces challenges in determining hybrid automatic repeat request (HARQ) process identifiers for multiple configured scheduling processes, leading to difficulties in performing forward error correction for downlink and uplink communications.
Innovation Solution
The UE determines HARQ process identifiers for multiple configured scheduling processes by receiving information from TRPs, using equations to calculate identifiers based on slot and symbol numbers, allowing assignment of identifiers to respective process instances, enabling forward error correction across multiple TRPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple configured scheduling processes are used in multi-TRP configurations, then communication reliability and error correction capability are improved, but HARQ process identifier determination becomes complex and error-prone
Solution Approach 1:
The patent divides the HARQ process identifier determination into separate segments for each configured scheduling process. Each process instance has its own dedicated HARQ process identifier set, allowing independent management and determination without interference from other processes. This segmentation resolves the complexity by creating modular, process-specific identifier management.
Solution Approach 2:
The patent performs preliminary configuration of HARQ process identifier sets for each configured scheduling process before actual data transmission. The network device pre-assigns and configures distinct HARQ process identifier ranges for different TRPs and scheduling processes, so that during operation, the UE can directly use these pre-configured identifiers without complex real-time determination, thereby reducing operational complexity while maintaining reliability.
2Adaptability or versatility
If HARQ process identifiers are determined using equations based on slot and symbol numbers, then identifier assignment becomes systematic, but calculation overhead and processing time increase
Solution Approach 1:
The network device performs preliminary configuration of HARQ process identifier sets and their corresponding equations for each configured scheduling process before data transmission begins. The UE stores these pre-configured identifier sets and associated parameters (such as offset values, scaling factors), enabling it to quickly determine identifiers by simple substitution of current slot and symbol numbers into pre-established equations, rather than performing complex calculations in real-time.
Solution Approach 2:
The patent applies different HARQ process identifier determination equations and parameters locally to each configured scheduling process and TRP combination. Each process instance has its own customized identifier determination method tailored to its specific timing and resource allocation characteristics, allowing flexible and adaptive identifier assignment while optimizing processing efficiency for each local context rather than using a universal complex equation.
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 determine a first hybrid automatic repeat request (HARQ) process identifier set associated with a first configured scheduling process and may determine a second HARQ process identifier set associated with a second configured scheduling process. The UE may assign an HARQ process identifier, included in the first HARQ process identifier set, to a process instance associated with the first configured scheduling process and may assign an HARQ process identifier, included in the second HARQ process identifier set, to a process instance associated with the second configured scheduling process. Numerous other aspects are provided.