Changes between Version 19 and Version 20 of Documentation/FAQ


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Timestamp:
Dec 9, 2005, 8:15:28 PM (18 years ago)
Author:
faiyaz
Comment:

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  • Documentation/FAQ

    v19 v20  
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    28 The ORBIT radio grid emulator is an indoor wireless network testbed. It supports experimental research on a broad range of wireless networking issues and application concepts with various network topologies and network layer protocol options.  It also support virtual mobility for mobile network protocol and application research. The ORBIT radio grid emulator currently uses 802.11x based radio cards. Some examples of systems and protocol designs that can be investigated on the ORBIT emulator grid include:
     28The ORBIT radio grid emulator is an indoor wireless network testbed. It supports experimental research on a broad range of wireless networking issues and application concepts with various network topologies and network layer protocol options.  It also support virtual mobility for mobile network protocol and application research. The ORBIT radio grid emulator currently uses 802.11a/b/g based radio cards. Some examples of systems and protocol designs that can be investigated on the ORBIT Testbed include:
    2929
    3030  * Large-scale wireless access networks based on 802.11a, b, g radios along with new protocols for discovery, routing, mobility management, security, etc. under various indoor and outdoor usage scenarios and network topologies.
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    3333  * Mobile applications such as location-based services, VoIP over MANET, mobile multicasting, etc.
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    35 In the future, the ORBIT emulator grid will support other radio interfaces such as Blootooth and allow research on heterogenerous wireless networks. It can also accommodate new technologies such as UWB as they emerge.
     35In the future, the ORBIT Testbed will support other radio interfaces such as Blootooth, Zigbee, GNU Radio, and allow research on heterogenerous wireless networks. It can also accommodate new technologies such as UWB as they emerge.
    3636         
    3737Can I test my new physical layer model on ORBIT?
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    3939
    40 No. Due to indoor setup constrains, the ORBIT emulator grid does not capture all radio channel effects. The radio channels for the ORBIT emulator grid will normally have no significant multipath. For physical layer radio testing, the absence of multipath would be unacceptable; however, for a wireless network testbed, the differences are less significant.  A combination of channel impairment and multiuser interference results in the failure of the physical layer to provide a reliable link so that connectivity is lost at the network layer. Using programmable interference and grid mobility, the emulator will create similar variations in network connectivity.
     40No. Due to indoor setup constrains, the ORBIT emulator grid does not capture all radio channel effects. The radio channels for the ORBIT Testbed will normally have no significant multipath effects. For physical layer radio testing, the absence of multipath would be unacceptable; however, for a wireless network testbed, the differences are less significant.  A combination of channel impairment and multiuser interference results in the failure of the physical layer to provide a reliable link so that connectivity is lost at the network layer. Using programmable interference and grid mobility, the testbed can create similar variations in network connectivity.
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    61 Currently, RSSI, TX_power, noise, throughput, offered-load, and packet retry can be measured and collected. Users can select one or more of these parameters to be collected and stored in the database.
     61Currently, RSSI, TX_power, noise, throughput, offered-load, and the number of packet retransmissions can be measured and collected. Users can select one or more of these parameters to be collected and stored in the database.
    6262
    6363Getting Started
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    9797           
    98 Yes. you can get root access to all of the radio nodes used in your experiments.
     98Yes. The nodes are yours to do what you will during your slot.  Just ssh root@nodeX-Y and be greeted by the familiar root@node:~/# prompt.
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    100100Do my nodes have consoles I can look at?
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    102102
    103 Yes. Each of the radio nodes has its own serial console line with which you can interact through the chasis manager (CM). In any case, all console output from each node is saved so that you may look at it later.
     103Yes. Each of the radio nodes has its own serial console with which you can interact through the chasis manager (CM).  From the experiment console machine, telnet 10.1.X.Y 3025 in the case of the grid, and telnet 10.1.10N.XXXXYYYY 3025 in the case of the sandbox where N is the sandbox number.
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    105105Can I reboot (power cycle) my nodes?
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    113113
    114 Yes. We provide sources and packages for a few versions of  Linux. We are also developing software components and libriaries for experiemnt control, experiment data collection, and user application development.
     114Yes. We provide packages mainly for GNU/Debian Linux, but sources are also available that should compile on most distributions. We are also developing software components and libriaries for experiment control, data collection, and application development.
     115
    115116
    116117Hardware Setup