wiki:Hardware/bDomains/aGrid

Version 36 (modified by seskar, 8 years ago) ( diff )

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Grid

Table of Contents

  1. Hardware
    1. Domains
      1. Grid
        1. Massive-MIMO mini-racks
        2. Servers
        3. Noise Injection subsystem
          1. Noise Antennas in the Grid
      1. Outdoor
        1. Fixed nodes
        2. Mobile nodes
        3. Netbooks
        4. Android Phones
          1. HTC Evo 4G (model: PC36100)
      1. Sandboxes
        1. SB1
          1. RF Connections
        1. SB2
          1. RF Connections
          2. Networking Setup (eth2)
          3. Using images based on baselines before June 12, 2017
          4. Resetting / Rebooting X310's
        1. SB3
        1. SB4
          1. Node to Node RF Path
          2. Node to WiMAX basestation RF Path
        1. SB5
        1. SB6
          1. CR-Kit
          2. Parallela Platform
          3. WARP
        1. SB7
        1. SB8
        1. SB9
          1. Data Switch Connections
          2. Procedures (Edge Core Wedge)

Block diagram of the ORBIT Grid domain is shown in Figure 1. Main components of this domain are:

  • Grid nodes: 20 x 20 machines arranged in the grid configuratoin (20 rows with 20 nodes each) with spacing of 3 feet.
  • Massive-MIMO racks: four mini-racks of SDRs with 32 antennas each
  • Servers: number of servers of varying capabilities
  • Virtual machines: number of on-demand VM instances
  • Noise injection subsystem:
  • Support infrastructure: Ethernet switches, console and other support hardware
ORBIT Grid Block Diagram
Figure 1: ORBIT GRID

Massive-MIMO mini-racks

Massive-MIMO mini-rack
Figure 2: Massive-MIMO mini-rack

Servers

Number of hihger-core count/larger memory servers some of which are equipped with GPUs.

Noise Injection subsystem

The Centralized Arbitrary Waveform Injection Subsystem (CAWIS) consists of arbitrary waveform generator (Agilent ESG) connected through distribution network to four multi-band antennas located in the four corners of the grid. The distribution network enables control over the attenuation of the individual antenna feed. Using CAWIS, users can inject (among other types of waveforms) AWGN signals into the main ORBIT grid and thus create different topologies.

Noise Antennas in the Grid
Figure 2: CAWIS
Interference Injection Subsystem Block Diagram
a.) Block Diagram b.) Noise injection antenna positions

As most of the Orbit services, CAWIS is a web-based service accessible from main grid console through url: ​http://instrument1.orbit-lab.org:5054/interference. As with other aggregate managers, accessing this url without any other arguments will show it's usage page.

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