Autonomous Resource Selection for HARQ Retransmissions
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Solution Overview
Problem
Current wireless communication systems, particularly in 3GPP LTE and NR, face challenges in efficiently managing resource allocation and retransmissions for Transport Blocks (TBs) in diverse usage scenarios, including eMBB, mMTC, and URLLC, where autonomous resource selection and retransmission grants are not effectively standardized for optimal performance.
Innovation Solution
A method where a wireless device autonomously selects a set of resources from a pool for N number of TB transmissions and requests a retransmission grant based on completion and requirement, using a Hybrid Automatic Repeat request (HARQ) process identifier, allowing for efficient resource management and retransmissions in various communication scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a wireless device autonomously selects resources from a pool for N transmissions, then resource utilization efficiency is improved, but the complexity of resource management increases
Solution Approach 1:
The resource pool is segmented into multiple individual resources that can be independently selected. The transmission process is segmented into N independent transmissions, each with its own resource selection. This segmentation allows the device to manage resources in discrete, manageable units rather than as a monolithic pool, improving utilization while controlling complexity through structured division.
Solution Approach 2:
The wireless device performs preliminary autonomous resource selection before transmissions are needed. By pre-selecting resources from the pool for N transmissions in advance, the device prepares resource allocation proactively, improving runtime efficiency while the complexity is managed through upfront planning rather than real-time decision-making under pressure.
2Reliability
If retransmission grants are requested based on completion and requirement status, then service quality is improved, but the signaling overhead increases
Solution Approach 1:
The system implements feedback mechanisms where the wireless device monitors transmission completion status and retransmission requirements. Based on this feedback, the device intelligently requests retransmission grants only when necessary (when N transmissions are completed and retransmission is required). This feedback-driven approach ensures high service quality by maintaining reliable communication while reducing unnecessary signaling overhead through conditional grant requests.
3Adaptability or versatility
If autonomous resource selection is implemented for diverse usage scenarios, then adaptability is improved, but the difficulty of standardization increases
Solution Approach 1:
The patent implements a universal resource selection mechanism that can be applied across diverse usage scenarios (eMBB, mMTC, URLLC, V2X). The same autonomous resource selection framework and HARQ process management approach works universally for different service types, improving adaptability while actually reducing standardization difficulty by providing a single standardized solution rather than scenario-specific implementations.
Data Source
AI summary
A method and apparatus for activation and retransmissions for a pool of resources is provided. A first device autonomously selects a set of resources on a pool of resources for N number of transmissions of a Transport Block (TB) stored in a process. The first device transmits, to the network, a request for a retransmission grant for the process based on i) the N number of transmission being completed and ii) retransmission of the TB being required. The request includes a Hybrid Automatic Repeat request (HARQ) process identifier (ID) associated to the process.