Macro Pico Base Station Virtualization for Interference Mitigation
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Solution Overview
Problem
The enhancement of system capacity is limited due to the failure in joint processing between base stations in existing data transmission systems, which also restricts backhaul capability and synchronization requirements, leading to interference and suboptimal data rates in heterogeneous networks.
Innovation Solution
Implementing a data transmission method and system where a macro base station and a pico base station share the same station address, with an added antenna group interconnected through optical fibers, enabling centralized resource scheduling and joint transmission using beamforming to mitigate interference and improve data rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If base stations implement independent transmission without joint processing, then device complexity and synchronization requirements are reduced, but system capacity enhancement is limited and interference between cells increases
Solution Approach 1:
The patent merges the transmission functions of macro base station and pico base station by introducing a virtualization layer. The macro base station's antenna group is virtually combined with the pico base station to form a coordinated transmission system, enabling joint processing without physical integration. This allows resource scheduling and signal transmission to be coordinated between both base stations, improving system capacity while managing complexity through virtualization.
Solution Approach 2:
The patent introduces a virtualization mechanism as an intermediary between the macro base station and pico base station. This virtual layer enables joint processing and coordinated resource allocation without requiring direct complex interactions between the physical base stations. The virtualization framework mediates the coordination, reducing synchronization requirements and processing complexity while still achieving enhanced system capacity.
2Object-affected harmful factors
If base stations implement joint transmission with real-time coordination, then interference between cells is reduced and data rates are improved, but backhaul capability requirements and synchronization requirements increase
Solution Approach 1:
The patent implements preliminary resource allocation and scheduling decisions at the macro base station before actual data transmission. The macro base station pre-determines resource blocks, modulation schemes, and power levels based on channel state information, reducing the need for real-time coordination during transmission. This preliminary action reduces synchronization requirements while maintaining interference mitigation benefits.
Solution Approach 2:
The patent segments the joint transmission process into distinct functional layers: resource allocation, channel estimation, precoding, and signal transmission. Each layer can be processed independently with reduced synchronization requirements. The segmentation allows interference mitigation to be achieved through coordinated resource allocation without requiring tight real-time synchronization across all transmission parameters.
3Productivity
If centralized resource scheduling is implemented between macro and pico cells, then overall data rate is maximized, but backhaul capability requirements increase
Solution Approach 1:
The patent extracts the complex centralized scheduling function and relocates it to the macro base station, which has greater processing capabilities. The pico base station focuses on simpler functions like local channel estimation and signal transmission. This extraction reduces the backhaul overhead by eliminating the need to transfer large amounts of scheduling data between base stations, while still achieving centralized optimization of overall data rate.
Solution Approach 2:
The patent implements partial centralized scheduling where only critical resource allocation parameters are coordinated between macro and pico cells, rather than full centralized control of all transmission parameters. This partial action achieves sufficient data rate improvement while significantly reducing backhaul capability requirements compared to complete centralized scheduling.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for joint scheduling of communication resources, overcoming capacity limitations and enhancing overall data rates by synchronizing and coordinating transmissions between macro and pico cells, thereby reducing interference and maximizing data throughput.
Implementation Method 1
an antenna group is added at the station address of the macro base station, the antenna group and the macro base station interconnected through optical fibers, the antenna group covering the pico cell by using beamforming to implement functions of the pico base station
Data Source
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AI summary
The present invention provides a data transmission method and system, where the method is used in system architecture adopting a virtual heterogeneous network, where a macro base station covering a macro-cell and a pico base station covering a pico-cell share the same station address, and the method includes the following step: sending control information and data information to user terminals in the macro-cell and the pico-cell according to location information of the user terminals so that the user terminals obtain the data information according to the control information. The system includes a sending module. The present invention implements joint scheduling of resources between a macro base station and a pico base station, reduces interference between cells, and maximally improves an overall data rate.