IOV HARQ Feedback Resource Mapping Without Center Node
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Solution Overview
Problem
In Internet-of-Vehicles (IOV) communications, existing technologies lack efficient methods for transmitting Hybrid Automatic Repeat Request (HARQ) feedback information between devices without a center node for scheduling resources, leading to challenges in associating feedback information with corresponding data and scheduling time-frequency resources.
Innovation Solution
The method involves determining a resource location for HARQ feedback information based on the resource location of the user data, allowing the IOV devices to automatically determine and use corresponding time-frequency resources for sending and receiving feedback, eliminating the need for a center node to schedule feedback resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If IOV devices use broadcasting for information transmission without a center node, then device autonomy and network flexibility are improved, but the ability to efficiently schedule and associate feedback information with corresponding data deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-configuring mapping relationships between data resource pools and feedback resource pools before actual communication occurs. The first IOV device determines the second resource location for HARQ feedback based on the first resource location of the transmitted data, using pre-established mapping rules. This allows the system to maintain autonomous operation without center node scheduling while ensuring proper feedback association.
Solution Approach 2:
The patent implements self-service by enabling IOV devices to autonomously determine and manage their own feedback resource allocations. The second IOV device independently identifies the appropriate feedback resource location based on the received data's resource location and pre-configured mapping relationships, without requiring external scheduling from a center node. This self-service mechanism resolves the contradiction by maintaining network flexibility while managing feedback scheduling complexity through device autonomy.
2Speed
If IOV devices autonomously determine feedback resource locations without center node scheduling, then system simplicity and response speed are improved, but resource allocation accuracy and feedback association reliability deteriorate
Solution Approach 1:
The patent applies parameter changes by establishing deterministic mapping relationships between resource location parameters. The second resource location for HARQ feedback is derived from the first resource location of the transmitted data through predefined mapping rules. This parameter transformation approach ensures that autonomous devices can quickly determine feedback resources while maintaining accurate association through mathematical relationships between resource locations.
Solution Approach 2:
The patent implements feedback mechanisms where the determined second resource location for HARQ feedback is based on the first resource location of the transmitted data. This creates a closed-loop relationship where the feedback resource is directly linked to the data resource through established mapping relationships, ensuring accurate association while enabling autonomous operation without center node intervention.
3Reliability
If HARQ feedback information is transmitted using pre-configured mapping rules, then communication reliability is improved, but system complexity and configuration overhead increase
Solution Approach 1:
The patent applies segmentation by dividing the resource pool into distinct data resource pools and feedback resource pools with clear functional separation. The mapping relationships are established between these segmented pools, allowing devices to reliably determine feedback resources while managing complexity through structured organization. This segmentation enables reliable HARQ feedback transmission by clearly defining which feedback resources correspond to which data resources.
Data Source
AI summary
A method for transmitting feedback information between Internet-of-Vehicles (IOV) devices includes: a second IOV device receives at least one of first user data and scheduling control information of the first user data from a first IOV device; a second resource location of the first user data is determined based on a first resource location of the first user data, the first resource location indicating at least one of a time-frequency location of corresponding user data and a time-frequency location of scheduling control information of the corresponding user data; and Hybrid Automatic Repeat Request (HARQ) feedback information of the first user data is sent to the first IOV device based on the second resource location of the first user data.