Dynamic Functional Splits in Radio Access Network Central and Distributed Units
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing fronthaul requirements for radio access networks, particularly in terms of latency, bandwidth, and synchronization, especially as they transition to 5G technologies, due to the need for high-capacity, low-latency connections between remote radio heads and centralized baseband units.
Innovation Solution
The implementation of dynamic functional splits between central and distributed units in radio access networks, allowing for flexible allocation of processing tasks and resource utilization based on fronthaul capacity, latency, and deployment morphology, using the HetNet Gateway and Converged Wireless System to optimize network performance across different scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If centralized baseband processing is implemented with remote radio heads connected via fiber, then installation in large buildings and campuses is eased, but fiber availability and fronthaul infrastructure requirements become major problems
Solution Approach 1:
The system segments the baseband processing functionality into multiple distributed baseband units that can operate independently or in coordination. Each baseband unit can serve local radio heads without requiring connection to a centralized processor, thereby reducing dependency on extensive fiber infrastructure while maintaining the benefits of centralized coordination where fiber is available.
Solution Approach 2:
The patent introduces a spatial dimension to baseband processing by allowing distributed units to be placed at multiple locations throughout the network infrastructure. This enables radio heads to connect to the nearest available baseband unit, reducing fronthaul distance and fiber requirements while maintaining processing efficiency through coordinated operation across multiple units.
2Quantity of substance
If protocol stacks are distributed between different components to address fronthaul requirements, then fronthaul capacity requirements are reduced, but network operators lose control and must rely on equipment vendors' assessment
Solution Approach 1:
The system dynamically allocates protocol stack functions between centralized and distributed components based on real-time network conditions, fronthaul capacity, and operational requirements. This dynamic configuration allows network operators to adjust the distribution of processing functions to optimize fronthaul usage while maintaining control over network performance and vendor independence.
Solution Approach 2:
The patent enables changing of operational parameters such as protocol stack distribution, processing allocation, and fronthaul configuration to adapt to different network conditions and operator requirements. This parameter flexibility allows operators to control network behavior and optimize performance without being locked into fixed vendor assessments.
3Adaptability or versatility
If multiple functional split options are provided by standards bodies, then flexibility in addressing fronthaul needs is improved, but network operators are left at the mercy of equipment vendors' assessment
Solution Approach 1:
The system implements a universal platform that can operate with multiple functional split configurations between centralized and distributed components. This multi-functional architecture allows the same hardware and software platform to adapt to different fronthaul scenarios and operator preferences, while providing operator-controlled selection and configuration of the appropriate split option rather than vendor-imposed choices.
Data Source
AI summary
Systems and methods for Radio Access Network dynamic functional splits are de-scribed. In one embodiment, a method may be disclosed for Radio Access Network dynamic func-tional splits, comprising: determining, by a user for a RAN, a first split of different functionalities between a central Unit (CU) and a Distributed Unit (DU), the functionalities including a Radio Resource Controller (RRC), a Packet Data Convergence Protocol (PDCP), a Radio Link Control (RLC); a Medium Access control (MAC), a Physical Layer (PHY), and a Radio Frequency Unit (RF); and wherein the system is able to provide different splits of the functionalities based on fac-tors such as user count, fronthaul capacity, fronthaul usage, required baseband processing capacity, and latency.