Hybrid Optical Wireless Sensor Network QoS Optimization
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Solution Overview
Problem
Wireless sensor networks face challenges in providing quality of service (QoS) and energy-efficiency due to resource constraints, packet loss, and varying application requirements, where traditional protocols often conflict between network lifetime and QoS metrics.
Innovation Solution
The integration of optical and radio frequency (RF) wireless sensor networks with quality-aware cross-link optimization, allowing nodes to switch between optical and wireless links to exploit link diversity and minimize contiguous wireless links, thereby improving transmission performance and energy-efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless sensor networks use traditional protocols to ensure packet reliability, then packet loss is reduced, but energy consumption increases due to frequent retransmissions
Solution Approach 1:
The patent merges optical and wireless communication channels into a hybrid sensor network architecture. Optical channels provide high-speed, low-interference communication for reliable data transmission, while wireless channels maintain network flexibility and mobility. This combination resolves the contradiction by achieving packet reliability through optical links without the energy-consuming retransmissions associated with traditional wireless-only protocols.
Solution Approach 2:
The patent introduces an optical communication channel as an intermediary between sensor nodes and the sink. This optical channel acts as a reliable intermediary that guarantees packet delivery without requiring frequent retransmissions, thereby reducing energy consumption while maintaining packet reliability. The optical channel mediates the transmission between wireless sensing and data collection functions.
2Productivity
If wireless sensor networks increase transmission bandwidth to improve throughput, then data transmission speed increases, but radio collisions and interference increase
Solution Approach 1:
The patent replaces the wireless radio communication mechanism with an optical communication mechanism for bulk data transmission. Optical communication provides significantly higher bandwidth and does not suffer from radio collisions or electromagnetic interference. This substitution enables high throughput without the harmful radio collisions that plague traditional wireless networks.
Solution Approach 2:
The patent segments the communication function into two distinct channels: optical channels for high-speed data transmission and wireless channels for control and low-data-rate communication. This segmentation allows the system to achieve high throughput through optical links while using wireless links only for functions that require their unique capabilities, thereby minimizing radio collisions.
3Area of stationary object
If wireless sensor networks deploy more sensor nodes to improve network coverage, then monitoring capability increases, but network complexity and energy consumption increase
Solution Approach 1:
The patent adds an optical communication dimension to the traditional wireless sensor network architecture. By introducing optical channels as a new dimension of communication, the system can achieve better network coverage and monitoring capability through optical links while managing complexity through hierarchical organization and the complementary strengths of both optical and wireless channels.
Data Source
AI summary
A network includes an optical sensor network; and a radio frequency (RF) wireless sensor network coupled to the optical sensor network, wherein the optical sensor network and the RF wireless sensor network communications are coordinated over both optical and wireless links.