Master Distributed Unit Coordination for Wireless Network Interference
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Solution Overview
Problem
Current wireless communication networks face challenges in efficiently managing resource allocation and interference in densely spaced radio access networks, particularly in cell-free massive MIMO configurations, which affect signal-to-noise ratio and overall system performance.
Innovation Solution
The implementation of a centralized or distributed scheduler that coordinates contemporaneous transmission and reception across multiple radio units and distributed units, using channel state information to allocate resources and precoders, and negotiating resource blocks and precoders among units to optimize signal delivery and interference management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple distributed units transmit simultaneously to improve network capacity, then system throughput increases, but interference between transmissions worsens
Solution Approach 1:
A master distributed unit is introduced as an intermediary between multiple distributed units and the core network. The master DU coordinates resource allocation, precoder selection, and transmission scheduling among multiple DUs, enabling simultaneous transmissions while managing interference through centralized control at the master DU level.
Solution Approach 2:
The system dynamically adjusts transmission parameters including precoder matrices, resource block allocations, and power levels based on channel state information. By changing these parameters coordinateably across multiple DUs, the system optimizes network capacity while controlling interference through parameter coordination.
2Object-generated harmful factors
If resource allocation is centralized to improve coordination, then interference management improves, but system complexity increases
Solution Approach 1:
The system segments control functions between a master distributed unit and multiple slave distributed units. The master DU handles centralized coordination for interference management, while slave DUs execute specific transmission tasks. This segmentation provides centralized interference control without requiring full centralization of the entire system.
3Productivity
If channel state information is collected from all radio units to improve signal quality, then throughput increases, but information processing complexity increases
Solution Approach 1:
The system extracts and processes channel state information at the master distributed unit level, which then coordinates resource allocation and precoder selection. By centralizing CSI processing at the master DU rather than requiring all DUs to process complete CSI sets, the system achieves high throughput through coordinated transmissions while reducing overall information processing complexity through functional extraction.
Data Source
AI summary
A radio access network operates by obtaining, at a scheduler, CSI corresponding to a plurality of RUs associated with a master DU and another plurality of RUs associated with at least one other DU, wherein the CSI associated with the another plurality of RUs is obtained via another scheduler or via the at least one other DU; allocating, based on the CSI, a resource allocation for resource blocks associated with the plurality of RUs and the another plurality of RUs; negotiating with the another scheduler to obtain PRB resources of RUs controlled by the another scheduler; generating, based on the CSI, precoders associated with the plurality of RUs and the another plurality of RUs; and facilitating, via the master DU and based on the precoders and the resource allocation, contemporaneous transmission to a user equipment UE via the plurality of RUs and the another plurality of RUs and contemporaneous reception from the user equipment UE via the plurality of RUs and the another plurality of RUs.