HARQ Process Differentiation for Multi-TRP Wireless Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly in LTE and NR technologies, face challenges in efficiently managing hybrid automatic repeat request (HARQ) processes for multi-transmit receive point (TRP) modes, leading to excessive processing resource consumption and inability to distinguish between HARQ processes corresponding to different TRPs, which degrades user equipment (UE) performance.
Innovation Solution
The method involves determining HARQ processes for a multi-TRP mode based on the quantity of component carriers (CCs) and HARQ processes capable by the UE, and differentiating between TRPs using control resource sets (CORESETs) or search spaces associated with decoded downlink control information (DCI), ensuring that the total quantity of HARQ processes does not exceed the UE's capability and allowing identification of data from different TRPs for improved resource management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the quantity of HARQ processes is increased to support multi-TRP modes, then the capability to handle multiple TRPs is improved, but the processing resource consumption of the UE increases
Solution Approach 1:
The patent segments HARQ processes into different groups associated with different TRPs. Each TRP is assigned a specific set of HARQ process identifiers, allowing the UE to differentiate and process HARQ processes from different TRPs separately. This segmentation enables efficient resource management by preventing the UE from having to process all HARQ processes simultaneously across all TRPs, thus reducing processing resource consumption while maintaining the capability to handle multiple TRPs.
2Device complexity
If HARQ processes from different TRPs are not differentiated, then the system complexity is reduced, but the ability to identify and manage data from specific TRPs deteriorates
Solution Approach 1:
The patent applies local quality by assigning specific properties (TRP identifiers) to different HARQ processes based on their associated TRP. Each HARQ process is tagged with information indicating which TRP it belongs to, allowing the UE to locally identify and manage data from specific TRPs without requiring complex global differentiation mechanisms. This approach maintains relatively simple system architecture while enabling precise identification and management of TRP-specific data.
3Adaptability or versatility
If the UE is configured with more HARQ processes than its capability, then the multi-TRP mode support is enhanced, but the UE performance deteriorates due to excessive processing
Solution Approach 1:
The patent implements dynamic configuration of HARQ processes based on UE capability. The network configures the quantity and distribution of HARQ processes across TRPs according to the specific UE's processing capabilities, rather than using a fixed configuration for all UEs. This dynamic approach allows the system to enhance multi-TRP mode support for capable UEs while preventing performance degradation in UEs with limited processing resources, as each UE receives a configuration matched to its actual capability.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may determine a control resource set (CORESET) associated with decoded downlink control information (DCI) or a search space associated with the decoded DCI. The user equipment may determine a transmit receive point (TRP) differentiation between TRPs associated with a multi-TRP mode based at least in part on the CORESET associated with the decoded DCI or the search space associated with the decoded DCI. Numerous other aspects are provided.


