Radio Technology for Real-Time Application - The flex WARE Project

Transcription

1 Radio Technology for Real-Time Application - The flex WARE Project Wireless Factory Starter Group Meeting N 20-2 October ETSI, Sophia Antipolis, France Dr.-Ing. Lutz Rauchhaupt Institut für Automation und Kommunikation e.v. Magdeburg Werner-Heisenberg-Str. 396 Magdeburg Tel Fax: lutz.rauchhaupt@ifak.eu

2 Institut f. Automation und Kommunikation e.v. Magdeburg Research topic "Wireless Industrial Communication" Assessment of wireless technologies and solutions with respect to industrial automation applications Integration of wireless technologies and solutions into automation communication networks 2

3 Outline. flex WARE Target Application Scenarios 2. flex WARE Key Features 3. flex WARE Architecture 4. flex WARE Basic Technology Investigations Wireless LAN DECT CLDPS 3

4 Flexible Wireless Automation in Real-Time Environments Funded by European Commission (7. Framework, STREP, Objective 3 ICT , FKZ: ICT ) Duration: 09/ /20 Coordinator: Austrian Academy of Sciences (AAS, AUT) Partners: Austrian Academy of Sciences (AAS, AUT) Institute for Industrial IT (init, GER) Institut für Automation und Kommunikation (ifak, GER) Connect Blue (cb, SWE) Oregano Systems GmbH (ore, AUT) University of Catania (unict, ITA) Schneider Electric (schn, FRA) rt-solution.de GmbH (rt-sol, GER) Website: 4

5 flex WARE Target Application Fields Storage systems Luggage transport systems 5

6 flex WARE Target Application Scenario Provided by FIG Members AGVs for smart warehouse Description: Up to 0 AGVs moving in a 0m x 0m area Dynamic path calculation Moving speed: up to m/s Centralised architecture managed by a controller in the backbone network Need for mobile wireless push buttons for global emergency stop of all vehicles Expected performances: AGV PLC backbone: non critical traffic (traceability, non critical commands), latency between 50 ms and 0 ms AGV PLC devices: latency < 2 ms, so wireless is not considered here. Central controller HMI (mobile wireless emergency stop) Trend for the future: convergence between different wireless technologies with central configuration and maintenance. Strong interest for middleware independent from wireless technology. 6

7 flex WARE Target Application Scenario Provided by FIG Members Wireless industrial cranes over electrolytic cells for aluminium reduction Description of the setup: 2 parallel rows of 200 electrolytic cells (500m long) 8 overhead cranes move along the cells to handle the raw materials in and the liquid metal out Each crane operates over 300m Wireless communications: Crane PLC central controller in the plant backbone Task assignment & emergency commands from central controller to the crane Report of status information by the crane HMI traffic for the operator of the crane Crane PLC Crane PLC Anti-collision system Main requirements: Network Security, Reliability, Safety (SIL3) 7

8 flex WARE Integrated Solution for Factory Automation Factory Automation based on wireless technology Support of Mobility Flexibility Scalability Network Based Control Quality of Service Safety and security 8

9 flex WARE Key Features Multiple cells under one roof (Bandwidth and range limitation) Seamless handover between cells (Real-time requirements) Resource management (Bandwidth limitation and real-time requirements) Need for location awareness (Safety requirements and fast handover) Clock synchronisation (Localisation and real-time requirements) Integrated security approach (Safety requirements) 9

10 flex WARE System Architektur Real-time Backbone Network flex WARE controller flex WARE access point flex WARE node Automation device Wireless communication

11 flex WARE QoS Architecture: Controller (FC)

12 flex WARE QoS Architecture: Access Point (FAP) 2

13 flex WARE QoS Architecture: Node (FN) 3

14 flex WARE Handover Concept Approach: Usage of position information and the available centralised view of the system 4

15 Investigation of the Timing Behaviour of Industrial Wireless LAN Solutions Tests objective Investigation of influences to the time behaviour Wireless data rate Implementation Adjacent channel interference Condition summary Tx Channel Interferer WLAN 2 m 3 m m Tx Channel SUT WLAN Tx Channel Interferer WLAN 3 3 industrial WLAN solutions from different manufacturers 93 test cases with packet transmissions each (93 Mio time values) WLAN Channel, 7, 3 Data rates [MBit/s]: 6, 9, 2, 8, 24, 36, 48, 54, auto Level [dbm] Frequency [MHz] 5

16 Test Setup for WLAN Investigations Communication Load: 58 Bytes / 0,4 ms AP Channel 3, 3, m m Communication Load: 64 Bytes / ms AP Channel 7, 3, m Communication Load: 58 Bytes / 0,4 ms AP Channel

17 WLAN With Different Data Rates Without Interferer Numb ber of Packets Numb ber of Packets Transmission Delay [ms] Transmission Delay [ms] Transmission Delay at 6 MBit/s Transmission Delay at 54 MBit/s 7

18 Transmission Delay at Different Data Rates 2 Minimum Maximum Percentil 95th Delay [ms] Transmission TC.. TC..2 TC..3 TC..4 TC..5 TC..6 TC..7 TC..8 TC..9 6 Mbps 9 Mbps 2 Mbps 8 Mbps 24 Mbps 36 Mbps 48 Mbps 54 Mbps automatic 8

19 WLAN at 2 MBit/s without Interferer Numb ber of Packets Numb ber of Packets Transmission Delay [ms] Update Time [ms] Transmission Delay for Test Case..3 Update Time for Test Case..3 9

20 WLAN 2 at 2 MBit/s without Interferer Numb ber of Packets Number of Packets Transmission Delay [ms] Update Time [ms] Transmission Delay for Test Case 2..3 Update Time for Test Case

21 WLAN 3 at 2 MBit/s without Interferer Numb ber of Packets Numb ber of Packets Transmission Delay [ms] Update Time [ms] Transmission Delay for Test Case 3..3 Update Time for Test Case

22 Timing of WLAN (Channel 7, 2 MBit/s) with Interferences from Channel and Number of Packets Number of Packets Number of Packets Transmission Delay [ms] Transmission Delay [ms] Transmission Delay [ms] Distance of the interferer = m = 3 m = m Number of Packets Number of Packets Number of Packets Update Time [ms] Update Time [ms] Update Time [ms] 22

23 Timing of WLAN, 2 and 3 (Channel 7, 2 MBit/s) with Interferences from Channel and 3 in 3 m distance Number of Packets Number of Packets Number of Packets Transmission Delay [ms] Transmission Delay [ms] Transmission Delay [ms] WLAN WLAN 2 WLAN Number of Packets Number of Packets Number of Packets Update Time [ms] Update Time [ms] Update Time [ms] 23

24 Investigation of the Timing Behaviour of DECT CLDPS Protocol Timing Behaviour Investigations of a DECT Solution DECT Point-to-Point-Connection FT-PT PT-FT DECT with CLDPS Point-to-Point-Connection FT-PT PT-FT Point-to-Multipoint-Connection Burst Transfer FT-PTs Distributed Transfer FT-PTs Test objective Investigation of influences to the time behaviour Principal behaviour Optimisation potential Influencing values for defining test cases ca. 30 test cases has been executed with.000 packets per connection (ca. 5,6 Mio time values) User data length: 64 Byte (58 Byte) Application cycle: 5 ms ms Burst Transfer FT-PTs with Transfer PTs-FT Distributed Transfer FT-PTs with Transfer PTs-FT Multipoint-to-Point-Connection PTs-FT with Burst Transfer FT-PTs PTs-FT with Distributed Transfer FT-PTs 24

25 Test Architecture for DECT with CLDPS Test Application Distributed Test Component Distributed Test Component DUT DUT Distributed Test Component DUT Test Producer or Test Consumer Anritsu Data Quality Analyser Communication Interface Ethernet MBit/s Communication Characteristics Distributed Test Component DUT Test Producer or Test Consumer Conditions Portable Terminal (PT) Fixed Terminal (FT) Wireless Communication Media DECT with CLDPS RF Cable

26 Spectrum FT-PT-Transmission, T AC = 5 ms 26

27 Transmission Delay and Update Time for FT-PT-Transmission T AC = 30 ms T AC = 5 ms 27

28 Spectrum FT-PTs-Transmission, Distributed T AC = 3*24 ms 6ms / 24ms T AC =3*6ms / 3*24ms FT to PT FT to PT2 FT to PT3 FT to PT FT to PT2 28

29 Transmission Delay and Update Time for FT-PTs-Transmission, Distributed T AC = 3 * 24 ms FT - PT FT - PT2 FT - PT3 29

30 Spectrum FT-PTs- and PTs-FT-Transmission, Distributed T AC = 3 * 24 ms and T AC = 24 ms 30

31 Media Time FT-PTs- and PTs-FT-Transmission, Distributed T AC = 3 * 24 ms and T AC = 24 ms 3

32 Transmission Delay and Update Time FT-PTs- and PTs-FT-Transmission FT - PT PT - FT 32

33 Media Time DECT versus WLAN Level [dbm] Time [µs] 648 µs ca. 90 µs at 54 MBit/s 33

34 Transmission Delay and Update Time DECT versus WLAN, T AC = ms Number of Packets DECT CLDPS FT-PT DECT CLDPS PT-FT Transmission Delay [ms] WLAN 2 MBit/s Number of Packets Update Time [ms] 34

35 Summary and Outlook flex Ware addresses future wireless cellular network solutions for real-time communication in the factory hall. flex Ware takes into account different basis wireless technologies. The investigation of available implementations is the basis to indicate optimisation potential with respect to the flex WARE key features. Proof of concept platform will be implemented based formal specification. Formal specification and simulation model can support future standardisation activities. 35