Centralized BBU Pool Dynamic Load Sharing
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Solution Overview
Problem
Current cooperative radio access networks (C-RANs) face challenges in achieving cost-effective long distance fiber connections, scalable and dynamic load sharing, fault tolerance, reduced power consumption, and improved performance, particularly in centralized baseband unit (BBU) processing.
Innovation Solution
The implementation of a hardware architecture that includes a centralized BBU processing pool with dynamic load sharing capabilities, where processing units can be powered off during low traffic periods, and a control unit that manages load migration and power management, optimizing processing capacity and reducing overall power consumption by sharing peak loads between urban and suburban base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If centralized BBU processing is implemented in C-RAN, then processing capacity and performance are improved, but power consumption increases due to continuous operation of processing units
Solution Approach 1:
The system dynamically adjusts the operational state of processing units based on real-time traffic load conditions. Processing units are activated or deactivated according to demand, transforming the static power consumption model into a dynamic one that adapts to varying network conditions, thereby resolving the contradiction between maintaining processing capacity and reducing power consumption.
Solution Approach 2:
The system changes the operational parameter of processing units from a fixed on/off state to a dynamically adjustable state based on load conditions. By monitoring traffic load and adjusting the number of active processing units accordingly, the system optimizes the balance between processing capacity and power consumption, addressing the technical contradiction effectively.
2Use of energy by moving object
If processing units are powered off during low traffic periods, then power consumption is reduced, but response time increases when traffic peaks occur
Solution Approach 1:
The system performs preliminary actions by keeping standby processing units ready and pre-configured. When traffic load increases, these standby units can be rapidly activated without significant delay, ensuring that response time is maintained even though units are powered off during low traffic periods. This preliminary preparation resolves the contradiction between power reduction and response time.
Solution Approach 2:
The system implements feedback mechanisms that continuously monitor traffic load conditions and automatically trigger the activation of processing units when thresholds are exceeded. This closed-loop control ensures that units are activated in a timely manner in response to actual demand, preventing excessive response delays while still maintaining power savings during low traffic periods.
3Adaptability or versatility
If dynamic load sharing is implemented, then scalability and adaptability are improved, but system complexity increases due to load management overhead
Solution Approach 1:
The system segments the load management function into modular components that can be independently controlled and scaled. Each processing unit operates semi-autonomously with standardized interfaces, allowing the system to scale by simply adding more units without proportionally increasing management complexity. This segmentation resolves the contradiction between scalability and system complexity.
Data Source
AI summary
Embodiments of an enhanced Node B (eNB) configured for use in a cooperative radio access networks (C-RAN) and method for central baseband unit (BBU) processing are generally described herein. In some embodiments, the eNB may include a baseband unit (BBU) processing pool comprising a plurality of processing units. The BBU processing pool is configured to share the processing load of several sectors. A control unit may monitor the processing load of the processing units and perform dynamic load sharing by migrating the baseband processing between the processing units without changing a carrier used by user equipment operating with a sector.