Sidelink Resource Indication for Flexible NR TDD Allocation
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Solution Overview
Problem
The flexible nature of New Radio (NR) TDD configurations and variable slot usage for sidelink synchronization signals complicates the design of sidelink resource pools, making it difficult to provide adapted bitmap indication as in Long Term Evolution (LTE), leading to increased complexity and reduced resource utilization.
Innovation Solution
A resource determining method and terminal that obtain and utilize resource indication information, including target time periods and resource bitmaps, to determine sidelink transmission resources, simplifying the design by eliminating the need for reserved resources and improving resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If LTE-style fixed TDD configurations are used for NR sidelink resource pools, then bitmap indication can be adapted, but the system cannot accommodate NR's flexible TDD configurations with variable uplink resources (0-80) and flexible synchronization slots (1-64 slots)
Solution Approach 1:
The patent changes the parameters of resource indication from fixed LTE-style bitmaps to flexible NR-style indications that adapt to variable TDD configurations. The resource pool configuration includes parameters for uplink resource quantity (0-80) and synchronization slot quantity (1-64 slots), allowing the system to accommodate different NR TDD configurations dynamically.
Solution Approach 2:
The patent introduces dynamic resource allocation mechanisms where the sidelink resource pool can be flexibly configured based on current TDD conditions. The system dynamically adjusts resource allocation parameters including time domain resources, frequency domain resources, and resource indication information to match the flexible NR TDD configurations.
2Productivity
If flexible NR TDD configurations are implemented, then resource utilization is improved, but the complexity of providing adapted bitmap indication increases significantly
Solution Approach 1:
The patent extracts the resource indication mechanism from the fixed LTE bitmap approach and creates a separate, flexible NR-style indication system. This allows the resource pool to be configured independently according to NR requirements without being constrained by LTE bitmap structures, thereby improving resource utilization while managing complexity.
Solution Approach 2:
The patent creates a universal resource indication mechanism that can handle both LTE and NR configurations. The sidelink resource pool configuration includes universal parameters that can adapt to different TDD configurations, making the system multi-functional and capable of supporting various resource allocation scenarios without requiring separate specialized designs.
3Ease of manufacture
If reserved resources are maintained in the resource pool, then resource allocation is simplified, but resource utilization efficiency decreases
Solution Approach 1:
The patent discards the concept of permanently reserved resources in the sidelink resource pool. Instead, all resources are made available for dynamic allocation based on actual sidelink transmission needs. The network can allocate resources on-demand and recover them when not needed, eliminating waste from reserved but unused resources while maintaining allocation flexibility through dynamic configuration.
Data Source
AI summary
Embodiments of the present disclosure provide a resource determining method and a terminal. The method includes: obtaining resource indication information, where the resource indication information includes at least one of the following: at least one target time period, at least one resource bitmap, and a period of the at least one resource bitmap; and determining, according to the resource indication information, a resource used for sidelink transmission or a resource used for sidelink transmission within the target time period.