Dynamic Point Selection for Interference Management in Wireless Networks
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Solution Overview
Problem
Wireless communication networks face challenges in maintaining acceptable signal quality due to high building penetration loss, leading to interference issues that affect the efficient use of limited radio resources, particularly in areas with moderate traffic where macro cellular base stations struggle to provide reliable service.
Innovation Solution
The method involves determining interference at multiple network nodes and selecting an optimal transmission point for mobile entities based on the interference levels, employing techniques such as dynamic point selection and semi-static point selection to mitigate interference and enhance resource utilization within cell clusters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If macro cellular base stations are deployed to provide indoor services, then coverage area is improved, but signal quality deteriorates due to high building penetration loss
Solution Approach 1:
The patent divides the network into cell clusters with multiple transmission points (macro cells and small cells) to provide indoor services. Instead of relying on a single macro base station, the system segments coverage into multiple nodes that can cooperate to deliver signals into buildings, thereby maintaining signal quality while extending coverage area.
Solution Approach 2:
The patent introduces small cells as intermediary nodes between macro base stations and indoor users. These small cells act as mediators that receive signals from macro cells and retransmit them into buildings, overcoming the building penetration loss problem while maintaining the broad coverage of macro cells.
2Reliability
If multiple network nodes are used to improve coverage, then signal reliability is improved, but interference increases affecting resource utilization
Solution Approach 1:
The patent employs dynamic point selection (DPS) where the transmitting point is selected dynamically based on current interference conditions and user needs. This dynamic adaptation allows the system to switch between different transmission points in cell clusters, reducing interference while maintaining signal reliability through real-time optimization.
Solution Approach 2:
The patent changes the parameter of transmission point selection from static to dynamic/semi-static based on interference measurements. By monitoring interference levels at different network nodes and adjusting the transmitting point accordingly, the system maintains signal reliability while minimizing interference through parameter optimization.
3Productivity
If dynamic point selection is implemented to reduce interference, then resource utilization is improved, but system complexity increases
Solution Approach 1:
The patent implements semi-static point selection (SPSS) as a compromise between dynamic and static selection. Instead of full dynamic selection, the system updates transmission point configurations at semi-static intervals, achieving most of the interference reduction and resource utilization benefits while significantly reducing the signaling overhead and system complexity associated with continuous dynamic selection.
Data Source
AI summary
Methods and apparatus are disclosed for interference management. The interference management is based on dynamic point selection or semi-static point selection. The method includes determining interference at a plurality of network nodes. The method includes selecting a transmission point from the plurality of network nodes for a transmission to at least one mobile entity based on the determined interference.