RU Regrouping Schedules for Multi-DU Interference Control
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Solution Overview
Problem
Existing 5G O-RAN systems face challenges in managing interference between cells due to complex control requirements, especially in multi-DU environments, and struggle to efficiently allocate resources for diverse communication needs ranging from high-speed, high-capacity to low-speed, low-capacity services.
Innovation Solution
A management device and method that regroups RUs by changing their connection from one DU to another, rescheduling resource blocks to prevent interference, and reallocating resources to optimize resource usage without complex control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CoMP technology is used to prevent interference between cells, then spectrum usage is increased, but control complexity increases significantly
Solution Approach 1:
The patent segments the radio access network into independent DUs, each managing its own RUs and generating independent schedules. This segmentation eliminates the need for complex inter-cell coordination while maintaining efficient resource utilization through autonomous DU operations.
Solution Approach 2:
The patent introduces a management device as an intermediary that handles RU regrouping between DUs. This intermediary automatically generates new schedules and manages resource allocation, preventing interference without requiring complex control protocols between DUs.
2Productivity
If resource allocation is optimized for high-speed, high-capacity services, then communication performance improves, but resource allocation complexity increases due to multiple use cases
Solution Approach 1:
The patent applies local quality by allowing each DU to independently optimize resource allocation for its specific RUs and connected UEs based on local traffic conditions. This enables differentiated resource allocation strategies for different use cases (high-speed vs. low-speed services) without requiring centralized complex coordination.
Solution Approach 2:
The management device dynamically changes resource allocation parameters when regrouping RUs between DUs. By adjusting schedule parameters and resource block assignments based on current network conditions and service requirements, the system optimizes performance for diverse use cases without increasing operational complexity.
Data Source
AI summary
A management device communicably connected with first and second Distributed Units (DUs) communicably connected with first and second groups of Radio Units (RUs), the management device including one or more processors that, when regrouping an RU to be regrouped among the first group of RUs by terminating a connection with the first DU and newly communicably connecting with the second DU, execute processes of: acquiring information regarding first and second schedules, which are followed respectively by the first and second groups of RUs before regrouping; generating third and fourth schedules, which are to be followed respectively by the first and second groups of RUs after the regrouping, and which are assumed to be such that interference will not logically occur between the regrouped RU and the other RUs in the first and seconds group after regrouping; and supplying the third and fourth schedules to the first and second DUs, respectively.