Random Access Window Grouping for NTN Beam Establishment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In satellite mobile communication scenarios with large coverage areas, the efficiency of initial beam establishment is reduced due to varying user data and access user quantities across different beam coverage areas, leading to random access congestion when dynamic configurations are used for SSB beam sweeping and RO mapping.
Innovation Solution
Implement user grouping based on different random access conditions, configuring random access resources within specific windows, and activating additional windows when traffic or user overload occurs, using network devices to manage access collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic configuration of SSB beam sweeping periodicity and SSB-RO mapping is used to improve initial beam establishment efficiency in NTN scenarios, then beam establishment efficiency is improved, but random access congestion occurs when large quantities of user traffic bursts appear
Solution Approach 1:
The patent segments the random access process by dividing users into different groups (first user group and second user group) with different random access behaviors. The first user group performs random access in a first random access window while the second user group performs random access in a second random access window, effectively segmenting the random access time resources to reduce collisions during traffic bursts
Solution Approach 2:
The patent dynamically adjusts the random access window configuration based on traffic conditions. When traffic burst is detected, the network dynamically opens additional random access windows for the second user group, allowing flexible adaptation to varying traffic loads while maintaining low collision probability
2Ease of manufacture
If fixed mapping relationship between SSB and RO is used in NR system, then implementation is simple, but efficiency of initial beam establishment is reduced in NTN scenarios with large coverage areas
Solution Approach 1:
The patent introduces dynamic configuration of SSB-RO mapping relationships. The network device dynamically determines which ROs to open for different user groups based on detected traffic conditions, allowing the system to adapt to varying beam establishment needs while maintaining manageable implementation through standardized protocols
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Embodiments of this application pertain to the communication field, and provide a communication method and apparatus, to resolve a problem of random access collision. The method includes: An access network device groups users based on different grouping conditions, configures a corresponding random access window for each user group, where the random access window includes one or more random access resources, and configures, for a terminal device by using first information, time domain position information of the random access window and user grouping information corresponding to the random access window, so that the terminal device can determine a corresponding user group based on the user grouping information corresponding to the random access window, and initiate random access by using a random access resource in the random access window corresponding to the user group to which the terminal device belongs. This improves random access efficiency and reliability.