Configuration-Based HARQ Triggers Without DCI Priority Overhead
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face inefficiencies in managing hybrid automatic repeat request (HARQ) feedback due to the lack of flexible priority settings in triggering mechanisms, leading to suboptimal resource allocation and performance.
Innovation Solution
Implementing a configuration-based HARQ trigger system that allows for selecting and transmitting HARQ feedback priorities without explicitly indicating them, enabling more efficient resource allocation and improved communication performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If HARQ feedback trigger includes explicit priority field indication, then priority identification is accurate, but downlink control information overhead increases
Solution Approach 1:
The patent extracts the priority indication function from the downlink control information (DCI) and relocates it to higher-layer signaling (RRC or MAC signaling). This separation allows the DCI to be more concise while priority information is conveyed through configuration signals, resolving the contradiction between accurate priority identification and control overhead reduction.
Solution Approach 2:
The patent introduces higher-layer signaling (RRC/MAC signaling) as an intermediary mechanism to carry priority configuration information. This intermediary layer conveys priority settings before HARQ feedback generation, eliminating the need for explicit priority fields in the DCI while maintaining accurate priority identification through the configured priority-to-HARQ-process mapping.
2Ease of manufacture
If fixed priority mapping is used for HARQ feedback, then implementation is simple, but adaptability to different service requirements is limited
Solution Approach 1:
The patent transforms the fixed priority mapping into a dynamic, configurable mapping mechanism. Through higher-layer signaling, the network can dynamically assign different priorities to different HARQ feedback processes based on actual service requirements. This allows flexible adaptation to various service types (e.g., URLLC, eMBB, mMTC) while maintaining a relatively simple implementation structure through configuration-based operation.
Solution Approach 2:
The patent enables dynamic parameter changes in priority configuration through higher-layer signaling. Instead of using fixed priority values, the system allows the network to modify priority assignments and mappings based on current traffic conditions and service requirements. This parameter flexibility provides adaptability to different service requirements while keeping the core mechanism simple through configuration-based parameter adjustment.
3Productivity
If multiple priorities are supported in HARQ feedback, then resource allocation efficiency improves, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by configuring priority mappings and HARQ feedback process associations before actual data transmission occurs. Through higher-layer signaling (RRC/MAC), the network pre-establishes the relationship between priorities and HARQ processes, so that during operation, the UE can efficiently generate feedback without complex real-time decision-making. This preliminary configuration enables multiple priority support while reducing operational complexity.
Solution Approach 2:
The patent enables the UE to autonomously determine which HARQ feedback processes to activate based on pre-configured priority mappings and received downlink control information. The UE self-determines the appropriate feedback generation without requiring complex network coordination or additional signaling during the feedback transmission, thereby supporting multiple priorities while minimizing system complexity through autonomous operation based on pre-established configurations.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive signaling indicating one or more selected priorities, of at least two priorities, to which a trigger for hybrid automatic repeat request (HARQ) feedback applies. The UE may receive downlink control information (DCI) including the trigger for the HARQ feedback and omitting a field indicating the one or more selected priorities. The UE may transmit the HARQ feedback for the one or more selected priorities in accordance with the signaling. Numerous other aspects are described.