Geometrical Interference Analysis for mm-Wave Cellular Networks
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Solution Overview
Problem
Current cellular networks operating in the mm-wave frequency band lack efficient methods to identify and mitigate potential mutual interference among intra-system communications, leading to transmission collisions and increased signaling overhead.
Innovation Solution
A geometrical-based interference analysis is employed to determine interference sets of mm-wave transmission links and implement resource partitioning mechanisms, such as time-division multiplexing, or alternative measures like establishing transmission links on lower frequencies, to prevent collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mm-wave frequency bands are used to increase network capacity and peak bit rates, then spectral availability and bandwidth are improved, but transmission collisions and mutual interference among intra-system communications worsen
Solution Approach 1:
The patent performs preliminary identification of potential interfering transmission links using geometrical analysis of antenna radiation patterns and link configurations before collisions occur. This allows the network controller to proactively establish resource sharing clusters and apply time-division multiplexing or frequency band assignment to prevent collisions, rather than reacting after interference occurs.
Solution Approach 2:
The patent segments the set of transmission links into distinct resource sharing clusters based on geometrical interference analysis. Each cluster contains links that could potentially interfere with each other, allowing the system to manage interference at the cluster level through coordinated resource allocation, time-division multiplexing, or frequency band assignment.
2Reliability
If resource partitioning mechanisms are implemented to prevent transmission collisions, then transmission reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent applies resource partitioning mechanisms locally only to transmission links that are identified as potentially interfering through geometrical analysis. Instead of applying uniform resource management across all links, the system selectively creates resource sharing clusters only where interference risk exists, based on the radiation patterns and spatial relationships of specific antenna systems.
Data Source
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AI summary
A method for assigning frequency bands on a cellular network deployed in a geographical area is provided. The cellular network comprises a plurality of network nodes each one equipped with at least one antenna having a corresponding radiation pattern and being configured to activate transmission links between pairs of corresponding network nodes to exchange traffic. The method comprises, in response to the assessment of a new transmission link to be activated between a first network node and a second network node, carrying out the following sequence of operations: retrieving an indication of coordinates of the first and second network nodes within the geographical area; retrieving an indication of resource sharing clusters of the cellular network, each resource sharing cluster comprising a group of transmission links considered as potentially cause of transmission collisions to each other, selecting a set of the resource sharing clusters according to a comparison of the coordinates of the first network node with the coordinates of the network nodes corresponding to the transmission links of the resource sharing clusters; if the selected set of resource sharing clusters is not empty, carrying out the following operations a) – c): a) identifying possible transmission collisions between the new transmission link and the transmission links of the selected set of resource sharing clusters according to a comparison of the coordinates of the network nodes corresponding to the transmission links of the selected set of resource sharing clusters with the radiation pattern of the first network node; b) assigning one of the frequency bands to the new transmission link according to the identification of the possible transmission collisions; c) activating the new transmission link by exploiting the assigned frequency band.