Master-Slave Base Station Architecture for Dynamic RRU Expansion
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Solution Overview
Problem
The existing LTE network system faces increased management burdens as the number of cells grows with the expansion of air interface resources, leading to inefficiencies in cell management.
Innovation Solution
A communication system comprising a master base station, slave base stations, and remote radio units (RRUs) where the master base station sends downlink data to slave base stations or RRUs, which perform Layer 1 and Layer 2 baseband processing to convert the data into air interface vector data and analog data, allowing for dynamic addition of slave base stations or RRUs without increasing the number of cells, thereby maintaining manageable resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of base stations and cells is increased to expand air interface resources, then the air interface resources are improved, but the management burden of cell management equipment increases
Solution Approach 1:
The patent segments the base station functionality by introducing remote radio units (RRUs) that can be independently managed. Each RRU handles specific radio functions while being controlled by a central base station, allowing air interface resources to be expanded through additional RRUs without proportionally increasing the management burden at the cell level.
Solution Approach 2:
The patent introduces an intermediary management layer where the base station manages multiple RRUs, which in turn manage multiple cells. This hierarchical structure acts as a mediator that reduces the direct management burden on cell management equipment by consolidating control at the base station level.
2Quantity of substance
If more RRUs are connected to a base station to increase cells, then the air interface resources are expanded, but the complexity of data transmission and processing increases
Solution Approach 1:
The patent segments the data transmission path by having the base station send data to specific RRUs based on transmission channel identifiers, rather than managing all cells directly. This segmentation reduces data transmission complexity by creating a hierarchical routing structure where the base station only needs to manage RRU-level routing.
Solution Approach 2:
The patent changes the management parameter from cell-level direct control to RRU-level control using transmission channel identifiers. This parameter change simplifies data transmission by using RRU identifiers as the primary routing key, reducing the complexity of managing multiple cells directly.
Data Source
AI summary
A communication system and method are provided. The communication system includes a master base station, a slave base station and a remote radio unit (RRU); where a cell controlled by the slave base station is included in cells controlled by the master base station. The master base station is configured to receive downlink data and send the downlink data to the slave base station; and the slave base station corresponds to a transmission channel identifier of the downlink data. The slave base station is configured to receive the downlink data sent by the master base station, convert the downlink data into air interface downlink vector data, and send the air interface downlink vector data to the RRU. The RRU is configured to convert the air interface downlink vector data into analog data and send the analog data to a user equipment, thereby realizing data transmission.