Dual-Mode Router for WirelessHART and ISA100.11a Interoperability
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Solution Overview
Problem
Existing wireless process communication standards like WirelessHART and ISA100.11a coexist but do not interoperate effectively, leading to inefficiencies and potential collisions in shared radio-frequency spectrum and timeslots, which limits the performance and management of joint networks.
Innovation Solution
A dual-mode router is developed to translate and relay packets between WirelessHART and ISA100.11a networks, enabling efficient use of the radio-frequency spectrum, avoiding transmission collisions, and providing coordinated system management by leveraging similarities in physical, MAC, and DLL layers, and using a common network infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If WirelessHART and ISA100.11a networks operate in the same frequency band, then wireless communication coverage is improved, but transmission collisions and interference increase
Solution Approach 1:
The patent implements time-division multiple access (TDMA) where WirelessHART and ISA100.11a networks are assigned different time slots for transmission. This periodic allocation of transmission opportunities eliminates collisions while maintaining coverage, as each network transmits only during its designated time window
Solution Approach 2:
The system dynamically adjusts transmission parameters including time slot allocation, frequency hopping sequences, and power levels based on real-time network conditions. This dynamic adaptation allows the networks to coexist efficiently in the same frequency band without fixed collision-prone schedules
2Adaptability or versatility
If distinct wireless network standards operate independently, then device compatibility is maintained, but network management complexity increases
Solution Approach 1:
The gateway device is designed with multi-functionality to support both WirelessHART and ISA100.11a protocols simultaneously. It can act as a WirelessHART router, an ISA100.11a router, a translator between the two standards, and a network manager, consolidating what would otherwise require multiple separate devices
Solution Approach 2:
The gateway serves as an intermediary between WirelessHART and ISA100.11a networks, translating packets and coordinates transmission schedules. This intermediary function simplifies management by providing a single point of control that handles protocol conversion and coordination, rather than requiring direct peer-to-peer management between incompatible standards
3Use of energy by moving object
If wireless networks use shared radio-frequency spectrum, then spectrum utilization is improved, but transmission collisions occur
Solution Approach 1:
The system divides the shared radio-frequency spectrum into periodic time slots, allocating specific slots to WirelessHART and others to ISA100.11a networks. This periodic structure maximizes spectrum utilization while preventing collisions by ensuring only one network transmits at any given time
Solution Approach 2:
The gateway performs preliminary coordination by pre-scheduling transmission time slots and frequency hopping sequences for both networks before transmission begins. This advance planning ensures efficient spectrum use while eliminating the possibility of collisions by reserving specific spectral resources for each network
Data Source
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AI summary
A dual-mode router (50) for conveying process communication packets across a plurality of distinct wireless process communication networks is provided. The router (50) includes wireless communication circuitry (52) and a controller coupled to the wireless communication circuitry (52). The wireless communication circuitry (52) is configured to interact with signals from each of the plurality of distinct wireless process communication networks. The controller (58) is configured to adapt process communication packets from a first distinct wireless process communication network for transmission over a second distinct wireless process communication network. Methods for configuring the distinct wireless process communication networks and relaying process packets over the distinct wireless process communication networks are also provided.