NTN Random Access Resource Pools for Large-Cell Capacity
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Solution Overview
Problem
Next generation telecommunication systems, particularly Non-Terrestrial Networks (NTN), face challenges with larger cell sizes leading to reduced user density and significant transmission delays due to excessive cell coverage, which current random access resource configurations are not optimized for.
Innovation Solution
Implementing multiple common and dedicated random access resource pools with extended frequency domains and flexible configurations per cell, beam, or bandwidth part, along with enhanced power control and distinct resource selection methods to accommodate varying transmission delays and user densities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If larger cell sizes are used in NTN systems, then cell coverage is improved, but random access capacity deteriorates
Solution Approach 1:
The patent divides the random access resources into multiple resource pools (first random access resource pool and second random access resource pool) with different configurations. This segmentation allows the system to accommodate both extensive cell coverage and sufficient random access capacity by providing differentiated resource allocations for different service types or user groups within the large cell.
Solution Approach 2:
Different random access resource pools are configured with different parameters (such as different time-frequency resources, different preamble sets, or different response window durations) to provide localized optimization. This allows specific quality of service requirements to be met in different regions or for different user types within the large cell coverage area.
2Area of stationary object
If larger cell sizes are used in NTN systems, then cell coverage is improved, but user density deteriorates
Solution Approach 1:
By segmenting the cell into multiple resource pools with different configurations, the system can support varying user densities in different regions. Resource pools can be optimized for high-density scenarios or low-density scenarios, allowing the large cell to accommodate diverse user distribution patterns.
Solution Approach 2:
The random access configuration can be dynamically adjusted based on detected user density conditions. The system can switch between different resource pool configurations or adjust parameters dynamically to optimize performance under varying user density conditions within the large cell.
3Area of stationary object
If larger cell sizes are used in NTN systems, then cell coverage is improved, but transmission delay deteriorates
Solution Approach 1:
The patent introduces multiple random access resource pools with different time-domain configurations, including different response window durations and different timing advance values. This segmentation allows the system to accommodate the variability in transmission delays across different locations within the large cell by providing multiple timing options for random access procedures.
Solution Approach 2:
Different resource pools use different parameter settings such as varying response window lengths, different preamble formats, or different power control parameters to optimize performance for different transmission delay conditions. This parameter differentiation allows the system to compensate for the extended propagation delays inherent in large-cell NTN deployments.
Data Source
AI summary
Method, systems and devices for improved random access resource configuration and resource selection in a random access procedure. Multiple common resource pools are configured to increase random access resource capacity.