Sidelink Resource Allocation via HARQ NACK Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently allocating resources for sidelink signals, particularly in determining the appropriate amount of resources needed based on Hybrid Automatic Repeat Request (HARQ) feedback, which can lead to resource wastage and suboptimal signaling.
Innovation Solution
A method and apparatus that involve transmitting and receiving HARQ feedback to dynamically allocate resources for sidelink signals, where the number of resources for the next sidelink signal is determined based on the received HARQ feedback, allowing for adaptive resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resources are allocated for sidelink signals without considering HARQ feedback, then resource allocation is simple and fast, but resource wastage occurs and allocation efficiency deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where HARQ feedback information is transmitted from the receiving terminal to the scheduling terminal. The scheduling terminal uses this feedback to dynamically adjust resource allocation for sidelink signals, ensuring that resources are allocated based on actual transmission needs and improving overall resource allocation efficiency while reducing waste
Solution Approach 2:
The patent introduces dynamic resource allocation where the number of resources allocated for sidelink signals is adjusted based on HARQ feedback. This dynamic adjustment allows the system to adapt resource allocation in real-time according to channel conditions and transmission requirements, optimizing productivity while minimizing resource wastage
2Productivity
If resources are allocated based on HARQ feedback, then resource allocation efficiency improves and waste is reduced, but signaling overhead and system complexity increase
Solution Approach 1:
The patent uses HARQ feedback as a compact information carrier that conveys transmission status (ACK/NACK) from receiving to scheduling terminals. This feedback mechanism provides necessary information for resource allocation decisions without requiring extensive signaling, thus improving productivity while keeping signaling overhead manageable
Solution Approach 2:
The patent adjusts resource allocation parameters based on HARQ feedback outcomes. When NACK is received, the system increases resource allocation for retransmission; when ACK is received, normal allocation continues. This parameter adjustment approach improves resource allocation efficiency while utilizing existing feedback structures to minimize additional signaling complexity
Data Source
AI summary
One embodiment relates to a method for transmitting and receiving a signal by means of a base station in a wireless communication system, comprising the steps of: transmitting, to a first terminal, a signal for allocating a resource for a sidelink signal; receiving, from the first terminal, information on the number of one or more Hybrid Automatic Repeat Request (HARQ) Non-ACKnowledgement (NACK) feedbacks for the sidelink signal; and transmitting, to the first terminal, information for allocating a resource for the next sidelink signal, wherein the number of resources for the next sidelink signal is determined on the basis of information on the number of one or more HARQ NACK feedbacks for the sidelink signal.