Virtualized RAN Orchestration via Adaptive IP Fronthaul
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Solution Overview
Problem
Traditional distributed radio access networks face challenges in managing latency and complexity due to fixed radio spectrum limitations, leading to expensive and error-prone network deployment and maintenance, especially with the increasing data traffic from smartphones.
Innovation Solution
The implementation of a virtualized Radio-as-a-Service (RaaS) technology using adaptive IP-based fronthaul protocols, allowing for dynamic orchestration and management of baseband units (BBUs) and remote radio units (RRUs) over standard IP networks, enabling flexible deployment and resource allocation without dedicated hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional distributed RAN architecture is used with dedicated hardware, then network reliability is maintained, but device complexity and deployment cost increase
Solution Approach 1:
The patent segments the RAN architecture by decoupling the BBU into control plane and user plane functions, and separating RRUs from BBUs through IP-based fronthaul. This segmentation allows independent deployment and management of different network functions, reducing overall deployment complexity while maintaining reliability through modular architecture.
Solution Approach 2:
The patent implements universal BBUs that can serve multiple RRUs and support multiple radio access technologies (2G, 3G, 4G) through software configuration rather than dedicated hardware. This multi-functionality reduces device complexity and deployment cost while maintaining network reliability through flexible resource allocation.
2Adaptability or versatility
If fixed radio spectrum is used, then spectrum management is simplified, but network adaptability to increasing data traffic deteriorates
Solution Approach 1:
The patent implements dynamic spectrum management through software-defined radio (SDR) in the BBUs, allowing real-time adjustment of frequency allocation, modulation schemes, and bandwidth based on traffic demands. This dynamic approach enhances spectrum adaptability to increasing data traffic while the centralized control plane simplifies overall spectrum management complexity.
Solution Approach 2:
The patent changes the management approach from fixed hardware-based spectrum allocation to software-configurable parameter adjustment. The control plane dynamically modifies spectrum parameters (frequency, bandwidth, power) based on network conditions, enhancing adaptability while centralizing management functions to reduce complexity.
3Ease of operation
If RRUs are tightly coupled to BBUs, then processing speed is maintained, but network flexibility and ease of maintenance deteriorate
Solution Approach 1:
The patent introduces an IP-based fronthaul network as an intermediary between BBUs and RRUs, replacing direct physical coupling. This intermediary maintains processing speed through optimized IP protocols and quality of service (QoS) mechanisms while enabling flexible deployment, remote maintenance, and dynamic resource allocation that improve ease of operation.
Solution Approach 2:
The patent segments the tight coupling between BBUs and RRUs by introducing logical separation over IP networks. This segmentation allows independent maintenance and upgrading of BBUs and RRUs without affecting the other, improving ease of operation while maintaining processing performance through dedicated IP resources and QoS guarantees.
4Productivity
If specialized hardware is used for RAN functions, then processing performance is optimized, but adaptability to changing demands and ease of deployment worsen
Solution Approach 1:
The patent replaces specialized hardware with software-based processing in virtualized BBUs that run on commodity hardware. The control plane software dynamically allocates processing resources to maintain optimized performance while the virtualization framework provides adaptability to changing demands and simplifies deployment through software configuration rather than hardware installation.
Solution Approach 2:
The patent changes from fixed hardware performance optimization to dynamic software parameter adjustment. The virtualized BBU can modify processing parameters (thread priority, resource allocation, algorithm selection) based on demand, maintaining productivity while providing deployment flexibility through software configuration on standard hardware platforms.
Data Source
AI summary
One embodiment is directed to a system comprising a baseband unit (BBU), a cluster of remote radio units (RRUs), and an orchestration module. The cluster of RRUs and BBU communicate with each other over a fronthaul link using an adaptive protocol. The cluster of RRUs is configured to appear as a single base station to a plurality of mobile terminals in connection with providing wireless service to the plurality of mobile terminals. The orchestration module is configured to configure the cluster of RRUs so that a first RRU of the cluster of RRUs transmits first data to a first mobile terminal included in the plurality of mobile terminals and a second RRU of the cluster of RRUs transmits second data to a second mobile terminal included in the plurality of mobile terminals during a same time period using a same frequency.