Interlaced Resource Mapping for Sidelink-Unlicensed OCB Compliance
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Solution Overview
Problem
Current wireless communication systems face challenges in meeting the higher performance requirements for sidelink transmission, particularly in terms of transmission width, communication speed range, communication delay, and reliability, especially when relying solely on licensed spectrum, necessitating the development of sidelink-unlicensed (SL-U) technology to utilize unlicensed frequency bands effectively.
Innovation Solution
A resource configuration method and device that maps Interlaced Resource Blocks (IRBs) to resource pools, determining configuration information based on subcarrier spacing, ensuring that two consecutive IRBs are separated by a specific number of resource blocks, thereby meeting the Occupied Channel Bandwidth (OCB) requirements on unlicensed frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sidelink transmission is limited to licensed spectrum only, then network control and reliability are maintained, but transmission width and communication speed range are insufficient to meet future diversified application demands
Solution Approach 1:
The patent segments the unlicensed spectrum resources into multiple resource pools with different configurations, allowing the system to divide and conquer the challenge of unlicensed spectrum usage. Each resource pool can be independently configured with specific IRB patterns, enabling flexible adaptation to different application scenarios while maintaining overall system control through network-side configuration management.
Solution Approach 2:
The patent changes key parameters such as subcarrier spacing, cyclic prefix length, and IRB pattern configurations to optimize performance for different service types. By dynamically adjusting these parameters in the resource pool configurations, the system can adapt to diverse application requirements including eMBB, URLLC, and mMTC scenarios while operating on unlicensed spectrum.
2Reliability
If resource allocation on unlicensed frequency bands does not meet OCB requirements, then spectrum utilization is simplified, but transmission performance and compliance with regulatory standards deteriorate
Solution Approach 1:
The patent applies preliminary action by pre-configuring resource pools with valid IRB patterns that inherently satisfy OCB requirements. The network device prepares multiple resource pool configurations in advance, each with pre-validated IRB mappings and subcarrier spacing configurations, so that when unlicensed spectrum is needed, compliant resource allocations are already ready to be activated without complex real-time calculations.
Solution Approach 2:
The patent introduces resource pools as an intermediary layer between the network device and terminals for unlicensed spectrum resource allocation. This intermediary structure with predefined IRB patterns and configurations simplifies the interaction while ensuring OCB compliance, as the resource pool configurations act as pre-validated templates that both network and terminals can reference without complex negotiations.
3Productivity
If IRBs are allocated without specific separation patterns, then resource allocation flexibility is increased, but OCB requirements and spectral efficiency are compromised
Solution Approach 1:
The patent applies local quality by creating different IRB separation patterns (M values) for different resource pools based on local requirements. Each resource pool can have its own specific IRB configuration with tailored separation distances, allowing optimal spectral efficiency for specific service types while maintaining overall system manageability through localized rather than uniform configuration.
Solution Approach 2:
The patent introduces dynamics by allowing the network to configure multiple resource pools with different IRB patterns and enable/disable them dynamically based on traffic conditions and service requirements. The system can switch between different resource pool configurations with varying IRB separations and subcarrier spacings to adapt to changing spectral efficiency requirements without reconfiguring the entire system.
Data Source
AI summary
A resource configuration method is performed by a network device, and includes: mapping interlaced resource blocks to at least one resource pool, and determining configuration information of each resource pool in the at least one resource pool. The configuration information of each resource pool indicates a number of and positions of interlaced resource block indexes configured for the corresponding resource pool, and two consecutive interlaced resource blocks in the same interlaced resource block index are separated by M resource blocks, M being determined by a size of subcarrier spacing.