Sidelink Resource Allocation via Redundant Control Information
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In sidelink communication, especially in NR V2X, efficient data transmission and reception are hindered by the lack of ACK/NACK feedback in broadcast schemes, making it difficult to determine data receipt at all terminals, and resource allocation methods are needed to improve communication performance.
Innovation Solution
The method involves transmitting redundant first and second control information, each containing resource allocation information for data transmission resources, allowing receiving terminals to successfully receive data even if only one control information is received, and reducing resource collisions by determining the position of reserved resources within a predetermined time period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If broadcast scheme is used for data transmission, then data can be transmitted to all terminals, but it is difficult to determine whether data has been normally received at each terminal
Solution Approach 1:
The patent introduces a feedback mechanism where receiving terminals send ACK/NACK signals back to the transmitting terminal to confirm data reception status. This resolves the contradiction by enabling the transmitter to determine which terminals successfully received the broadcast data, thus maintaining both wide coverage and reception confirmation capability.
Solution Approach 2:
The patent segments the broadcast transmission into multiple stages or groups, allowing selective acknowledgment from different terminal groups. This enables the system to maintain broadcast coverage while obtaining partial feedback information about data reception status across different terminal segments.
2Productivity
If control information is transmitted without redundancy, then transmission efficiency is improved, but reliability of control information reception deteriorates
Solution Approach 1:
The patent applies partial redundancy by transmitting control information multiple times or with partial repetition only when necessary based on channel conditions or terminal feedback. This resolves the contradiction by providing enhanced reliability through selective redundancy while maintaining overall transmission efficiency by avoiding excessive repetition in all cases.
3Adaptability or versatility
If resource allocation is not reserved in advance, then resource utilization flexibility is improved, but resource collisions increase
Solution Approach 1:
The patent implements preliminary resource reservation where terminals reserve future transmission resources in advance based on current channel conditions and traffic patterns. This resolves the contradiction by reducing resource collisions through proactive reservation while maintaining flexibility by allowing dynamic adjustment of reserved resources based on changing conditions.
Solution Approach 2:
The patent enables terminals to autonomously perform resource reservation and collision avoidance without centralized coordination. Each terminal independently monitors channel conditions, reserves resources, and adjusts its transmissions to avoid collisions with other terminals, thus achieving both flexibility and collision reduction through distributed self-service mechanisms.
Data Source
AI summary
A method for transmitting data in sidelink communication, performed by a transmitting terminal, may comprise transmitting first control information including first resource allocation information for a first data transmission resource and second resource allocation information for a second data transmission resource; transmitting data through the first data transmission resource; transmitting second control information including the first resource allocation information for the first data transmission resource and the second resource allocation information for the second data transmission resource; and transmitting data through the second data transmission resource.