NR V2X Sidelink Resource Reservation with Dynamic Slot Formats
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Solution Overview
Problem
In the context of 5G NR V2X communication, flexible slot configurations can lead to challenges in resource allocation and signaling for partial coverage communication or inter-cell communication, particularly when slot formats change, causing issues with reserved resources being unavailable for sidelink transmission.
Innovation Solution
A method for performing sidelink transmission involves receiving information on multiple resource pools configured based on different slot formats, reserving resources accordingly, and adapting transmission based on these configurations to ensure efficient communication, including canceling or reconfiguring previously reserved resources and utilizing additional dedicated resource pools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible slot configurations are used in NR V2X communication, then system adaptability and versatility are improved, but resource allocation reliability deteriorates when slot formats change
Solution Approach 1:
The patent implements dynamic resource pool configuration where the network can configure multiple resource pools with different slot formats and dynamically indicate which resource pool should be used for sidelink transmission. This allows the system to adapt to changing conditions while maintaining reliable resource allocation through network control.
Solution Approach 2:
The patent changes the slot format parameters dynamically by configuring multiple resource pools with different slot formats (e.g., different numbers of downlink, uplink, and flexible symbols) and allowing the network to indicate which configuration should be applied. This enables adaptation to varying traffic conditions while maintaining allocation reliability.
2Adaptability or versatility
If multiple resource pools with different slot formats are configured, then communication adaptability is improved, but device complexity increases
Solution Approach 1:
The patent creates a universal resource pool configuration framework where multiple resource pools are defined with different slot formats, but all follow the same management and selection procedures. The network indicates which resource pool to use through standardized signaling, allowing the system to handle diverse communication requirements through a unified mechanism.
3Productivity
If resource reservation is performed based on initial resource pool configuration, then resource allocation efficiency is improved, but transmission reliability deteriorates when slot formats change after reservation
Solution Approach 1:
The patent implements a feedback mechanism where the network monitors slot format changes and provides updated resource pool configuration indications to UEs. When slot formats change after resource reservation, the network can indicate alternative resources or adjust the configuration, ensuring that previously reserved resources remain valid and transmissions are reliable.
Data Source
AI summary
A method by which a first device (100) performs sidelink transmission and an apparatus for supporting same are presented. The method comprises the steps of: receiving information about a first resource pool set on the basis of a first slot format; reserving a first resource for the sidelink transmission on the basis of the information about the first resource pool; receiving information about a second resource pool set on the basis of a second slot format, after reserving the first resource; and performing the sidelink transmission on the basis of the information about the second resource pool.