Wire Lan Testing
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The document discusses emulating wireless network transmissions using wired Ethernet connections by: 1) Simulating radio propagation between nodes to determine packet reception. 2) Segmenting frames and simulating transmission speed to emulate analog radio effects. 3) Simulating collisions by only allowing one station to completely transmit a radio frame at a time.
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This document provides instructions for installing and configuring Oracle Business Intelligence Applications (BI Apps) 11.1.1.7.1. The steps include installing JDK 1.6, WebLogic 10.3.6, running the RCU utility for OBIEE 11.1.1.7.0, installing and configuring OBIEE and ODI with the "Skip Repository Configuration" option, running the RCU utility for ODI and BI Apps schemas, installing and configuring BI Apps 11.1.1.7.1, applying FMW patches, updating the BIACOMP schema, integrating ODI security with OPSS, and setting up the ODI Studio to connect to the BI Apps
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Non daude ekonomistak LinkedInen?
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The document provides mobile design best practices, including minimizing images and ads to reduce data usage, accommodating different user preferences for browsing vs. searching, creating custom apps only for transactional rather than informational content, avoiding Flash, ensuring access on common mobile URLs, and including prominent home and back links. It also recommends limiting choices given screen size, maintaining a site depth of 4-6 levels, accommodating larger fonts and spacing between links, designing for different screen sizes and devices, and accounting for regional usage patterns that differ from developed markets.
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Common Myths and Misconceptions About the VA Hybrid Loan
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Ethernet is a widely used local area network technology that operates at the Physical and Data Link layers of the OSI model. It uses CSMA/CD access method to share the transmission medium and detect collisions. Key Ethernet standards include 10Base-T, 100Base-TX, 1000Base-T, and 10GBase-T for copper cable, as well as 100Base-FX and 1000Base-LX for fiber-optic cable. Switches help improve network performance by segmenting collision domains and enabling full-duplex transmissions.
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The document discusses the Wireless Controller Area Network (WCAN) protocol. WCAN is based on the Controller Area Network (CAN) protocol but makes it wireless. It uses a token frame scheme to transmit messages in a ring network topology. Simulation results showed that WCAN can achieve higher throughput and packet delivery ratios than IEEE 802.11 in some scenarios, especially when the packet transmission rate is increased. WCAN is suitable for real-time industrial automation and vehicle applications where microcontrollers need to wirelessly communicate with each other.
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Wire Lan Testing
- 1. WIRE-LAN TESTING OF WIRELESS NETWORK-CENTRIC SYSTEMS
- 2. July.15, 2002 WIRELESS NETWORK SIMULATION: GENERAL DYNAMICS C4 Systems
- 4. CONCEPT
- 5. EMULATE DIGITAL RADIO TRANSMISSION Station 1 Station 2 Wire Transmission(s) probe Data/ Voice/ Video Packet
- 8. SEGMENT FRAMES, EMULATE RADIO TRANSMIT SPEED Data/ Voice/ Video Packet, Analog Xmssn Start/Change Stop/Change EMULATION TYPE 1: 2: 3: 4: Probe Trailer Interframe gap computed to have last bit of the trailer coincide with the last bit of the emulated packet. Where data is unimportant, e.g. background traffic, can send minimum-sized trailer to save bandwidth. Other emissions (jamming, co-site, infared, optical) non-realtime simulation
- 9. SIMULATE COLLISIONS Real Time Transmit Part I Receive Part I Detect Collision Transmit Part I Receive Part I Receive Part II Transmit Part II Detect Collision Station I Station II ONLY ONE STATION COMPLETELY SENDS RADIO FRAME
- 10. CONSISTENT, DISTRIBUTED EMULATION For multiple active probes, consistency rule guarantees all receivers choose the same random seed. RANDOM SEED probe
- 11. RANDOM SEED BRINGS FAIRNESS BACK TO COLLISION MODEL Probe Trailer Receiver Timeline Time Of First Received Bit. Random Seed Sets Virtual Receive Time Within These Limits.
- 12. DEMONSTRATION
- 13. WIRELESS NETWORK SIMULATION: DEMONSTRATION LAN 10 Base T Linux 2.2.15 Uses Ordinary PC Components + Software + Modified Driver For 3 Com Ethernet III Card i586 i586 i586 i686 i686 i686 i686 i686 Two Drops Required For Identical Receive Ordering
- 14. APPROXIMATE WIRELESS LAN THROUGHPUT
- 15. SATURATION THROUGHPUT 550 600 650 700 750 800 850 Offered Traffic, Kbit/s Throughput, Kbit/s Tests, Five PCs Bianchi, Five Stations Tests, Seven PCs Bianchi, Seven Stations Five PCs Seven PCs Emulation Parameters Data Length 1024 octets MAC header 34 octets Channel Bit Rate 1 Mbit/s SIFS 28 s Slot Time 50 s ACK length 30 octets PHY header 16 octets Propagation delay 1 s DIFS 130 s Five PCs Seven PCs 610 623 721 714 812 812 906 912 1032 1026 10 9.8 10 9.8 max, avg frames delivered (1,000) 10 9.8 10 9.8 10 9.5 5.3 4.9 6.7 6.5 8.6 7.6 10 9.3 10 8.7 1.23 1.22 1.3 1.27 max avg 1.23 1.23 1.32 1.31 1.25 1.24 1.31 1.30 Five PCs Seven PCs Average Number Attempts Per Frame (Bianchi - 1.22, five stations)
- 16. Five PCs Seven PCs Bianchi - 1.22, five stations AVERAGE ATTEMPTS PER FRAME 812 812 906 912 1032 1026 Offered Traffic (Kbit/s) 1.23 1.22 1.3 1.27 max avg 1.23 1.23 1.32 1.31 1.25 1.24 1.31 1.30
- 17. VARY CONTENTION WINDOW (SATURATION)
- 22. COMPARISON (FOR REAL-TIME EMULATION)
Editor's Notes
- Is this Hardware In the Loop Testing?
- Initiative Title: Future Combat Systems Command and Control Sponsor: Battle Command Battle Lab - Leavenworth Initiative Type / Status: DARPA Program/ Ongoing CSE = Commander’s Support Environment Experimentation / Demonstration Strategy: The first FCS C2 Experiment was conducted at Ft Monmouth from 2-14 December under the operational control of the Program Manager. The experimental objective for this first of 4 experiments was “See and Move”. The objectives were focused on the ability of the 4 man command and control cell to manipulate the Unit Cells ISR assets to see the enemy and to maneuver their organic vehicles. The C2 cell operated in a mock-up based on the LAV III vehicle in an OTB driven scenario. The first week was spent training on the C2 Software (a Da Vinci derivative known as Commander’s Support Environment or CSE) and the second consisted of multiple scenario runs (2 to 3 a day). ARI representatives were collecting human factors feedback from the users following each run and collected and end of exercise survey. The next experiment is scheduled for May and will increase the workload and functional complexity of the cell by adding the “Shoot” function. It is expected the same players and facilitators will be involved. There are 4 planned experiments in this series. * FY03: Develop an integrated scaled operational and systems architecture for Unit Cell. *Develop a FCS C2 experimental demonstrator * Battle command training and rehearsal device *Experimental platform for future FCS research
- Bagrodia’s paper, page 5 discusses the impact of MAC retransmission limits on packet drop rates. Uses -- Sensor Fusion, Communications Bandwidth Allocation, Information Management, Information Security, Information Warfare, Network Maintenance, Location Management, Robotic Teams. Enablers -- Mobile software (Mobile Agents), Adaptive Software (Active Networks, Software Radios), Sensor Networks (LANs, Industry LANs), Distributed Algorithms (Multi-access techniques, Self-Organizing Networks, Self-Healing Networks, Distributed Optimization, Cooperative Target Recognition, Cooperative Target Tracking, Cooperative Node Mapping)