Topology Control in SB4

As shown in Figure 1, sandbox 4 consists of 8 nodes and a WiMAX subsystem that consists of a basestation and a controller. To prevent interference, each node is housed in ​Ramsey Electronics RF enclosure that provides 80 dB of isolation. Nodal wireless devices (Atheros 5000X mini-PCI card and Intel 6250 mini-PCIe 802.11/802.16) are connected to a power combiner and fed through the enclosure access port to the outside SMA connector which is wired to a single input/output of the ports of the RF Transceiver Test System from ​JFW Industries. This configuration enables fairly tight control of RF attenuation between the nodes. The topology is controlled through the ​OMF based Instrumentation AM.

Basestation is controlled through ​OMF based ​WiMAX RF Aggregate Manager Service that is running on machine cons-wm-01.

Example of topology control (execute on console.sb4):

To set attenuation between node1-8 and the BS to 20 dB

    wget -O status.xml "http://internal2dmz.orbit-lab.org:5052/instr/set?portA=8&portB=9&att=20"

Example of wimax control (execute on console.sb4):

To turn ARQ on (​ARQ Control part of wimaxrf AM)

    wget -O status.xml "http://cons-wm-01:5052/wimaxrf/arq?enable=true"