Directional Antenna Sub-Cells for Interference Management
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Solution Overview
Problem
Future radio communication networks face challenges in supporting increased user density and data rates while managing inter-cell interference and maintaining energy efficiency, particularly in dense urban areas and high-user-density environments.
Innovation Solution
The use of directional antennas arranged to overlap and create sub-cells within a cell area, allowing user equipment to communicate with a subset of antennas whose paths intersect, enabling efficient signal transmission and reception while minimizing interference through periodic phase modulation and coordinated scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency reuse of 1 is used to increase network efficiency and data rates, then network capacity and data rates improve, but inter-cell interference increases
Solution Approach 1:
The cell area is segmented into multiple sub-cells by dividing the coverage area into distinct regions, each served by specific directional antennas. This segmentation allows frequency reuse of 1 to be implemented while limiting interference between sub-cells, as each sub-cell operates with dedicated antenna resources.
Solution Approach 2:
Different directional antennas are assigned to different sub-cells with specific spatial orientations. Each antenna serves a particular directional sector, creating local quality differentiation in signal transmission and reception. This allows interference management to be optimized locally in each sub-cell while maintaining overall network capacity.
2Reliability
If CoMP techniques are used to serve users at cell edges with multiple base stations, then signal reception and throughput improve, but backhaul network demand and coordination complexity increase
Solution Approach 1:
The network is segmented into multiple directional antennas, each independently serving specific sub-cells. This segmentation allows signal transmission to be divided across multiple antenna paths, providing diversity and reliability for users at cell edges without requiring complex joint processing between geographically separated base stations.
Solution Approach 2:
Each directional antenna is designed to be multi-functional, serving multiple sub-cells in different directions. This universality allows a single antenna system to provide CoMP-like benefits by serving users at cell edges through multiple directional paths, eliminating the need for complex inter-base-station coordination.
3Productivity
If directional antennas are arranged to create overlapping sub-cells, then user density per radio equipment increases, but signal coordination and interference management become more complex
Solution Approach 1:
The cell area is segmented into multiple sub-cells through the arrangement of directional antennas with overlapping coverage. Each antenna is assigned to serve specific sub-cells, creating a segmented network structure that increases user density while maintaining manageable coordination through clear antenna-sub-cell associations.
Solution Approach 2:
The system transitions from traditional two-dimensional cell coverage to a three-dimensional antenna array configuration with directional beams overlapping in space. This dimensional change allows multiple antennas to serve the same geographic area from different spatial angles, increasing user density while enabling interference management through spatial separation.
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 increases user density per radio equipment or reduces equipment needed, limits interference, and achieves low interference outside served areas, enhancing network capacity and performance.
Implementation Method 1
each directional antenna provides a directional radio path along which the directional antenna is configured to send and receive radio communications
Implementation Method 2
controlling the signals transmitted from the plurality of directional antennas to define a plurality of sub-cells within the cell area by an overlap of a plurality of directional radio paths
Data Source
AI summary
A plurality of sub-cells are defined within a cell area of a radio communication network by the intersection of a radio paths of a plurality of directional radio antennas. The plurality of directional radio antennas are arranged to broadcast radio signals simultaneously, and to receive radio signals simultaneously. This disclosure relates to determining of signal values transmitted by or received from the plurality of directional radio antennas in a radio communication network.