wireless communications august 29, 2019
TRANSCRIPT
Wireless Communications
August 29, 2019
Bruce CollinsDirector - Product Management
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Cambium Networks at a Glance
• Wireless-Fabric company enabling purpose built 5G-like solutions
• Pioneer in Point-to-Multipoint and Point-to-Point IP Wireless Fixed Broadband Solutions
• Focused on global wireless connectivity; 2 meters to 245km – people, places and things
• Spun out of Motorola Solutions in October 2011• HQ outside of Chicago, IL• 700+ employees across 6 continents• More than 7 million nodes shipped totaling over
$1.5B
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Cambium Networks’ Wireless Fabric – Affordable, Scalable and Compelling Quality
GLOBAL SUPPORT
Copyright 2018 Cambium Networks, Ltd. All rights reserved.3
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Communications Market Direction
Needs
• Increasing demand for data
• Industries moving to private networks and IIoT implementations
• Security (physical and network)
• Accommodate dense sector deployments
• Preserve capital investment and minimize operating expenses
Challenges
• Available spectrum is limited and heavily congested
• Noise floor continues to climb
• Site leases in urban and suburban markets require highly efficient sectors
• Return on investment of deployed capital
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Consolidated Set of Applications
• Transport for SCADA and process control data
• Video surveillance and voice services
• High-capacity backhaul
• Remote facility connectivity
• Migration from serial to IP networks
• Offshore and over-water communications
• Plus…..
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Selecting a Mission-Critical Communications Infrastructure
• Capacity vs. Range vs. Spectrum
• Network Topology (PTP, PMP, Mesh, Ring)
• Licensed vs. Unlicensed spectrum
• Line of Sight (LOS) and Non Line of Sight (NLOS)
• Higher Modulation vs. More Streams (MU-MIMO)
• Resilience / High-Availability
• Power Consumption
• Standards vs. Proprietary
• Public vs. Private
• Security
• Quality of Service (QoS) / Traffic Prioritization
• Network Management
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What is a Legacy Wireless SCADA System?
• Serial-only communications (9600 baud or less)
• No remote firmware updates (EPROM’s)
• No remote management
• Specialized vendor-specific protocols
• Unsupported hardware and software
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What is a Modern Wireless SCADA System?
• Standards-based IP-based communications
• Centralized Network Management
• Fewer discrete devices (I/O, converters, RTU’s)
• Software-defined radios for higher capacity and more efficient spectrum usage
• Capital-efficient migration path
Fewer Truck RollsFaster Response TimesReduced Outage Times
Reduced Network Management CostsHigher Security
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Oil and Gas – Upstream/Midstream/Downstream Wireless Solutions
• Leaders of broadband in the oil field• Becoming the de facto standard for broadband
deployments• Digital Oilfield – we’ve been doing this for 13+ years
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Source: U.S. Energy Information Administration
Delaware BasinBalkan ShalePermian BasinEagleford Shale –
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Case Studies - 1Operator / Location
Wireless Applications Technologies Deployed Unique Aspects
Upstream PermianDelaware
• Corporate LAN Extension• Bandwidth injection to the pad
backhauling well automation / process control
• Video from pad and from drilling rigs
• 5 GHz Massive MU-MIMO PMP
• Licensed Microwave Backhaul
• Heavy use of video for on-pad video conferencing and troubleshooting
Upstream Delaware/Permian
• Well data gathering • Well shut-ins
• 5GHz and 900 MHz PTP and PMP
• 900 MHz Narrow-band• 5GHz MU-MIMO• Licensed Narrow-band
• Beam-forming helps with RF/Interference
• Using narrow-band and broadband as resilient backups
• Using GPIO built into radio rather than adding PLC/RTU
Upstream PowderRiver/Permian
• Remote access to business network
• Wellpad connectivity• Workforce automation
• Licensed Microwave• 3GHz PMP and PTP • 450 MHz Narrow-band• 900 MHz Narrow-band
• Migrating from 5GHzto 3GHz
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Natural Gas Pipeline - Colorado
• 300 nodes over 200 kilometers– Broadband backhaul– Licensed Narrow-band to each node– Each AP connects to 30-60 EP’s
• General Contractor: Cambium Partner– Network design– Procurement– Installation
• Application– Measuring flow rates– Detecting Leaks– Monitoring Temperature/Pressure
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Rail Applications – Mixing Serial with IP traffic14
Case Study:• Rail Yard Automation• Dual radio in back to back
repeater mode to connect each sensor/actuator and backhaul to signal operations center.
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IIOT System Architecture with Cambium Networks
ThingsNetwork
Control
SCADA
PLC
Ethernet Cable
Wireless Broadband
Wireless Narrowband
Protocols
Modbus TCP
DNP3
Modbus RTUMQTT
RTU
serialcnReach
VoltageCurrentOn/OffImpedance cnReach
cnReach
PTP820PTP700PMP450ePMPcnPilot
cnReach
Serial to IP
IP to Serial
IO to IP
IP capable things
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Deployment Topologies
Point to Point
Point to Multi-Point
Access Point (AP)
Back to Back Repeater(Dual-Radio)
End Point (EP)
End Point (EP)
End Point (EP)
Store-and-Forward Repeater(Single Radio)
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cnReachtm Narrow-Band Platform
DeploymentFlexibility
• PTP/PMP/Store-and-Forward Relay• Optional Digital / Analog I/O• Dual-band 900 MHz (MAS / ISM)• 700 MHz Licensed (U.S. Only)• 450 MHz (U.S. and Global/ETSI options)• 220 MHz• IO Expander Options• Dual-radio options
Highly Integrated I/O Feature Set
• MQTT, Seamless Serial, MODBUS TCP to RTU, Wire replacement
Reliable • 100% factory testing over temperature• ATEX/HAZLOC• Made in the U.S.A.
Low Power Consumption
• Simple integration with existing power (including solar)
Scalable • Access Point Synchronization• Adaptive Modulation
Secure • 128/256-bit AES encryption
Manageable • Cloud or NOC-based cnMaestro• LINKPlanner planning and BOM’s
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cnMaestro – Single Pane of Glass Management
Configuration and Firmware Updates
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Seamless Serial
• Broadcast type serial service to reduce TCP/IP overhead over the air
Serial DataTCP/IP
Serial Packetizer
Local TCP Server
Radio Raw Serial Data Broadcast over the airUsing Group ID as Identifier
TCP IP Header
Processing
Serial DataTCP/IP Serial Packetizer
Local TCP Server
Radio
TCP IP Header
Processing
• Serial Data is Prioritized over IP data
• In case of store-and-forwarding, it can pass through REP without problem.
TCP Terminal Client
Seamless Serial Map
TCP Terminal Client
Seamless Serial Map
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Modbus RTU over Seamless Serial
RTUserial
EP
Serial Service Seamlessserial
RTU BridgeSeamless serial
Seamless serial
Modbus TCPSlave
AP
Convert to Modbus RTU
192.168.0.3
192.168.0.3:4000
192.168.0.4
Modbus TCP Master
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Modbus TCP to Serial Modbus RTU Gateway
• Interworking between Modbus RTU and Modbus TCP– Modbus TCP over IP to Serial Modbus RTU– Modbus TCP over Seamless Serial to Serial Modbus RTU
RTUserial
cnReach network
Modbus TCPSlaveSerial to IP RTU bridge IP
Modbus TCP Master
TCP/IPTCP/IP orSeamless Serial
192.168.0.3:502
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Modbus RTU over TCP/IP
RTUserial
cnReach
Modbus TCPSlaveSerial Service RTU bridge IP
Modbus TCP Master
TCP/IP
192.168.0.3
192.168.0.3:4000
Convert to Modbus RTU
TCP/IP
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Digital I/O Representative Schematic and Examples
• Sense switch closing/openings with Digital Inputs
• Drive motor contacts or actuators with Digital Outputs (DO)
• Count low-frequency or high-frequency occurrences with Digital Inputs
• Pull-up resistor used to keep DO either normally ‘low’ or normally ‘high’
• Digital In can sink maximum 2A
4.7Kohm
65 Kohm0.1 OhmDigital Out
Pull-Up Enabled
+5 VDC
Digital In I/O Module Pin
I/O Module Pin
M
+5 VDC
Example: Digital Out
Example: Digital In
I/O ModulePin
Motor
Dry-contact Switch (door open/close)
cnReach
cnReach
cnReach
Detail view
External view
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Analog I/O Representative Schematic and Examples
• Measure pressures and levels with Analog inputs
• Drive variable valves or pump rates with Analog outputs
• Measurements use 16-bit A/D circuitry
4.7Kohm
250 Ohm
65K Ohm
Analog Input
Pull-Up Enabled
+VDC
I/O Module Pin
Example: Analog Out
Example: Analog In
I/O ModulePin
Pressure Gauge
Current Source
+VDC
AnalogOutput
Strong Pull-Down
Enabled
Voltmeter16-bit
Calibrated
+VDCCurrent Source
(4-20 mAOr
1-5VDC)
I/O ModulePin Proportional
Valve(4 mA – Closed;20mA – Open)
+VDC
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Wire Replacement Use Case
Flow Meter
Water Level Meter
Pump
Analog input 4-20mA DC
Analog input 4-20mA DC
Dry contact
cnReach with IOcnReach with IO
Amalog Meter(Flow Rate, Water Level)
Analog output 4-20mA DC
Fault LampOperation Lamp
(Pump Fault/Pump On/Off etc.)
Digital Output
Case #1, Read pin states on cnReach at Location A when state of pins on cnReach at location B changes (e.g. Door Switch opens/closes)
Case #2 Water pumps deployment - Signals input on the intake pump side shall be output on the processing plant side in the same format and score
Dry contact inputDigital output
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LOCAL PLC EXAMPLE
Door Sensor
LED
cnReach
• Door Sensor is a dry contact sensor connecting to PIN11 and PIN12• LED is connected to PIN1 and PIN4 • LED can be turned on using different level of current • Requirement is to turn on the LED when door is open and turn it off when door is close
Sample code
DR7= fnDRGet(7); PRINT DR7;IF DR7=1 THEN
fnHRSet(272,20000);PRINT "DOOR OPEN";
ELSEfnHRSet(272,0);PRINT "DOOR CLOSED";
ENDIF
Output on status pageIO configuration:
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Data Concentrator
• Introduced to make Modbus TCP polling much more efficient over narrow band links
RTU
RTU
RTU
SCADA Master
Wireless link
Modbus TCP
Modbus TCP
Modbus TCP
Without Data Concentrator
RTU
RTU
RTU
SCADA Master
Wireless linkModbus TCP
With Data Concentrator(DC)
cnReach cnReach
cnReachcnReach
DC
Modbus TCP
Modbus TCP
Modbus TCP
Same type of data from multiple RTU can be combined in single query
502 504
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Data Concentrator Configuration1) Add devices to the concentrator2) For each devices, you can add multiple polls3) Using Register (actually ModbusTCP channel address) as reference for the polls
Starting addressNumber of registers
This allows the DC to poll many registers at once
Registers that you are going to use
Here we poll 0-6 (7 registers, but only use 4)
Error can be set herePut in the register you want to use
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Data Concentrator Configuration
Add same type of data into a output.
In the example here, we add digital outputs from to different devicesNow you can query all these digital outputs in a single poll.
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MQTT (Message Queuing Telemetry Transport) overview
Brokersensor
sensor
Publish
Publish
Device
Subscribe
Control Master
Publish
Subscribe
High Level Architecture• Reduces traffic load by 90% or more depending on application• Change from polling to publish/subscribe
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MQTT Support by cnReach
cnReach
RTU
RTU
RTU
ModBusTCP MQTT PublisherMQTT Subscriber
MQTTPublish/Subscribe
MQTTBroker
ControllerPublishSubscribe
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Cambium Networks’ Wireless Fabric – Affordable, Scalable and Compelling Quality
GLOBAL SUPPORT
Copyright 2018 Cambium Networks, Ltd. All rights reserved.32
