Microwave Node Preamble Detection for Backhaul Interference Mitigation
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Solution Overview
Problem
Current microwave backhaul networks lack effective means to identify and mitigate interference between communication nodes, which hinders network densification and efficient frequency reuse.
Innovation Solution
A microwave communication node equipped with a transmitter to broadcast a unique preamble and a receiver to detect interference levels, allowing network control units to adjust transmit-receive parameters to reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If microwave communication networks increase frequency reuse and densification to handle growing data traffic, then network capacity and coverage are improved, but interference between radio links increases
Solution Approach 1:
The patent implements a feedback mechanism where communication nodes continuously measure interference levels by detecting preambles from other nodes and report these measurements to a network control unit. The network control unit uses this feedback information to dynamically adjust transmit power and frequency allocation, enabling the network to adapt to changing interference conditions while maintaining high frequency reuse and densification.
Solution Approach 2:
The patent changes operational parameters dynamically based on measured interference levels. The network control unit adjusts transmit power levels and frequency assignments according to real-time interference measurements, allowing the system to optimize performance by varying parameters in response to actual network conditions rather than using fixed configurations.
2Ease of manufacture
If existing power control methods are combined with higher frequency reuse, then cost savings are achieved, but power rushes occur causing unnecessary interference
Solution Approach 1:
The patent introduces feedback-based power control where nodes measure actual interference levels and report to the network control unit, which then adjusts power levels accordingly. This prevents power rushes by ensuring power increases are based on actual network conditions rather than aggressive predetermined algorithms, reducing unnecessary interference while maintaining cost-effective frequency reuse.
Solution Approach 2:
The patent uses preliminary measurements of interference levels through preamble detection before making power control decisions. The network control unit has advance knowledge of interference conditions through reported measurements, allowing it to plan power adjustments that avoid power rushes and unnecessary interference while still achieving cost savings through efficient frequency reuse.
3Device complexity
If no means are used to identify interference between microwave communication nodes, then device complexity is reduced, but network densification and frequency reuse are hindered
Solution Approach 1:
The patent implements self-service interference detection where each communication node autonomously measures interference levels by detecting preambles from other nodes and reports measurements to the network control unit. This distributed self-service approach enables network densification through intelligent interference management without requiring complex centralized interference analysis systems, maintaining operational simplicity while enhancing productivity.
Solution Approach 2:
The patent uses preambles as intermediaries to enable interference detection. Each node transmits a unique preamble that serves as an identifier and measurement signal. The preambles act as intermediaries that carry information about node presence and signal characteristics, allowing the network control unit to identify and manage interference between nodes without requiring direct complex node-to-node analysis.
Data Source
AI summary
The disclosure relates to a microwave communication node and method for detecting and mitigating interference in a microwave network. The microwave communication node comprises a transmitter configured to broadcast a preamble that allows other microwave communication nodes to identify the microwave communication node as the sender, and a receiver configured to detect preambles broadcasted by other microwave communication nodes and determine interference levels of the other nodes by measuring signal strength and identifying the sender of each received preamble.