Position-Aware RACH Configuration for Non-Terrestrial Network Capacity
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Solution Overview
Problem
In non-terrestrial networks, terminal devices without positioning capability face reduced RACH capacity due to the need for larger time intervals between adjacent time domain resources to accommodate their RACH receiving windows, limiting network access efficiency.
Innovation Solution
Generate and send multiple random access configurations with different time domain resources to terminal devices based on their positioning capability, allowing devices with and without positioning to select appropriate configurations for efficient random access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the time interval between adjacent time domain resources is increased to accommodate RACH receiving windows for terminal devices without positioning capability, then network access reliability is improved, but RACH capacity deteriorates
Solution Approach 1:
The patent segments RACH resources into two distinct groups: first RACH resources for terminal devices without positioning capability with larger time intervals, and second RACH resources for terminal devices with positioning capability with smaller time intervals. This segmentation allows each group to use resources optimized for their specific needs, resolving the contradiction between reliability for devices without positioning and overall RACH capacity.
Solution Approach 2:
The patent applies local quality by configuring different time interval characteristics for different RACH resource groups. The first RACH resources have larger time intervals localized for devices without positioning capability, while the second RACH resources have smaller time intervals localized for devices with positioning capability. This localized optimization allows the system to maintain reliability where needed while maximizing capacity elsewhere.
2Reliability
If the time interval between adjacent time domain resources is increased to ensure proper RACH receiving window operation, then access success rate is improved, but resource utilization deteriorates
Solution Approach 1:
The patent divides RACH resources into separate groups with different time interval configurations. The first group uses larger time intervals to ensure access success for devices without positioning capability, while the second group uses smaller time intervals to maximize resource utilization for devices with positioning capability. This segmentation resolves the contradiction between access success rate and resource utilization.
Solution Approach 2:
The patent changes the time interval parameter differently for different RACH resource groups. The first RACH resources use larger time interval values to ensure proper receiving window operation, while the second RACH resources use smaller time interval values to improve resource utilization. This parameter differentiation allows the system to optimize both access success rate and resource utilization simultaneously.
Data Source
AI summary
Embodiments of the present application provide a communication method and apparatus, and a device. The method includes: a terminal device receives network configuration information sent by the network device for acquiring a network device, wherein, the network configuration information includes multiple random access configurations, and time domain resources indicated by the multiple random access configurations are different; and the terminal device selects a specified random access configuration from the multiple random access configurations according to positioning capability of the terminal device to perform random access. RACH capacity is increased.