5G NR Sidelink Resource Reservation Conflict Detection
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Solution Overview
Problem
Current wireless communication systems face challenges in determining sidelink collisions and half-duplex conflicts, particularly in 5G networks, which affect the reliability of sidelink communications and resource allocation, especially in unlicensed and licensed spectrum operations.
Innovation Solution
Implementing mechanisms for determining sidelink collisions and half-duplex conflicts through inter-UE coordination feedback and enhanced resource (re-)selection procedures, including techniques for identifying and resolving conflicts in 5G networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sidelink communications are implemented in 5G networks, then wireless connectivity and network capacity are improved, but collisions and half-duplex conflicts increase, reducing communication reliability
Solution Approach 1:
The patent implements preliminary collision detection and half-duplex conflict identification before sidelink transmissions occur. UEs perform sensing procedures to detect potential collisions and conflicts in advance, allowing them to select alternative resources or adjust transmission parameters proactively, thereby preventing reliability degradation while maintaining sidelink functionality
Solution Approach 2:
The patent establishes feedback mechanisms where UEs report detected collisions and half-duplex conflicts to the network. This feedback enables the network to adjust resource allocation, modify sidelink configuration parameters, and coordinate transmissions to resolve conflicts, thereby improving communication reliability without sacrificing sidelink adaptability
2Reliability
If resource allocation for sidelink communications is increased, then communication reliability is improved, but resource conflicts and collisions increase due to more UEs accessing the same resources
Solution Approach 1:
The patent segments sidelink resources into dedicated pools for different UE groups, services, or priority levels. By dividing the resource space, the system can allocate sufficient resources to maintain reliability while reducing the probability of collisions through spatial and functional separation of transmissions
Solution Approach 2:
The patent dynamically adjusts transmission parameters such as power levels, modulation schemes, and time-frequency resource selections based on detected collision and conflict conditions. This allows the system to maintain reliable communications by adapting parameters in real-time while avoiding resource conflicts through parameter diversification
3Reliability
If collision detection and resolution mechanisms are implemented, then communication reliability is improved, but system complexity increases due to additional signaling and processing
Solution Approach 1:
The patent enables UEs to autonomously detect collisions and half-duplex conflicts using local sensing capabilities and stored configuration information. UEs independently identify problematic resources and select alternative transmissions without requiring complex centralized coordination, thereby improving reliability while limiting the increase in system complexity through decentralized self-service mechanisms
Data Source
AI summary
A computer-readable storage medium stores instructions to configure a UE for sidelink operation in a 5G NR network, and to cause the UE to perform operations including encoding a first SCI for transmission. The first SCI includes a first resource reservation for a subsequent sidelink transmission by the UE in a pre-selected slot. A second SCI received from a second UE is decoded. The second SCI includes a second resource reservation for a subsequent sidelink transmission by the second UE in the pre-selected slot. A reservation conflict is detected based on the first resource reservation and the second resource reservation using the pre-selected slot. A third SCI is encoded for transmission based on the detection of the reservation conflict. The third SCI includes a modified version of the first resource reservation for the subsequent sidelink transmission by the UE.