wiki:WiMAXInteg/CampusInstallation

Version 21 (modified by hmussman@bbn.com, 9 years ago) (diff)

--

7. Campus Installation

The following sections outline the steps necessary to complete a campus installation, based on a WiMAX base station kit provided by Rutgers WINLAB and NEC.

The contents of the WiMAX base station kit provided by Rutgers WINLAB and NEC are listed here:

ISSUE: Need current list.

The (significant) items that the campus must provide are listed are:

ISSUE: Need current list.

Once the WiMAX base station kit has been installed on the campus, and is operational, the GPO can arrange the transfer of ownership from the NSF to the university.

7.1 Obtain FCC License

Each campus must apply to the FCC and obtain a license (experimental authorization) to operate the WiMAX equipment at their location.

NOTE: It is suggested that this process be started IMMEDIATELY, to assure that a license can be obtained.

ISSUE: What situations are likely? Where the university has a license? What if they don't have a license?

The person submitting the application needs to obtain either a personal or institution FCC Registration Number (FRN). If one is not available, it can be obtained through FCC's COmmission REgistration System (CORES) registration.

With the FRN, an applicant can start the application process by filling out Form 442. Required information for filling up the form includes:

  • Frequency: [specify range near 2.5GHz]
  • Frequency tolerance: 0.00002 %
  • Power: 20 W
  • Radius: 5 km
  • Location: [use Google Earth/Maps to find out latitude/longitude of the location where you plan to install the antenna]
  • Emission designator: W7D
  • Contracting Agency: National Science Foundation
  • Contract Number: 0944089

ISSUE: What about requesting multiple sites? Note that WINALB/Rutgers license lists two sites.

It should be noted that this license (experimental authorization) "is to be used for fulfilling the requirements of a U.S. government contract".

Each application should attach a project overview, including details of NSF contract (award) in the filing process. to increase the likelihood of license issuance and to expedite the process.

At the end of the application process, the applicant must pay the $60 application fee; the fastest method of payment is by credit card. NOTE: FCC has a site for testing the application process.

Once application process is completed and assuming there are no issues with the particular location, FCC will issue a WIMAX license after 4-8 weeks .

Here is a sample license, the WINLAB Rutgers WiMAX license received from the FCC.

ISSUE: The Rutgers/WINLAB license state: "Licensee must get consent from Educational Broadband Services and Broadband Radio Services licensees in the immediate vicinity of the tests."

This must be done at each site. Could it be done for all sites by contacting Sprint/ClearWire on behalf of GENI?

ISSUE: What happens when Sprint/ClearWire stsrts commercial service in the area? Must shut down? When might this be expected?

7.2 Identify Outdoor Site on Campus

An outdoor site (e.g., the roof of a building) should be identified on campus that meets these requirements:

  • High, to maximize range. Since throughput and coverage of WiMAX systems are highly influenced by the antenna location, care should be taken that the antenna is mounted so that siginificant portion of First Fresnel Zone is clear of obstructions. Ideally the antenna is mounted on the elevated structure providing clear line of sight to most of the intended coverage area.
  • Access to building ground, for lightning protection, using a heavy ground cable.
  • Access to Indoor Equipment Room, for power and fiber (signal) cables. The use of a conduit is preferred, but otherwise the fiber (signal) cables must be mechanically protected.
  • Secure access, to prevent unauthorized people from disrupting operation, or receiving unhealthy electromagnetic exposure.

NOTE: It is suggested that this process be started IMMEDIATELY, to assure that an appropriate outdoor site can be identifed.

7.3 Identify Indoor Equipment Room on Campus

An indoor site (e.g., an IT equipment room) should be identified on campus that meets these requirements:

  • Equipment rack space to mount Base Station Indoor Unit.
  • Equipment rack space to mount Linux Servers contained in kit, currently 3 servers.
  • Access to Outdoor Site, for power and fiber (signal) cables. The use of a conduit is preferred, but otherwise the fiber (signal) cables must be mechanically protected.
  • Access to building ground, to ground equipment racks and mounted equipment.
  • Access to -48VDC feeds for Base Station Outdoor Unit (max 4A) and Base Station Indoor Unit (max 8.3A), or else -48VDC rectifiers run from 110VAC feeds.
  • Access to 110VAC feeds for Linux Servers, and possibly -48VDC rectifiers. If possible, the 110VAC feeds should be protected with an Uninterruptible Power Supply (UPS) that bridges short power gaps, to prevent disrupting the WiMAX testbed from the most common (short) power gaps.
  • Access to backbone network Layer 2 connection.
  • Secure access, to prevent unauthorized people from disrupting operation.

NOTE: It is suggested that this process be started IMMEDIATELY, to assure that an appropriate indoor equipment room can be identifed.

7.4 Install Wiring at Outdoor Site and to Indoor Equipment Room

The following cables must be run at the Outdoor Site and between the Outdoor Site and the Indoor Equipment Room:

  • Heavy ground cable, from pole to building ground, for lightning protection.

ISSUE: Does this require a PE?

  • Two coaxial cables between (one) Outdoor Unit and (one) Antenna, including lightning protector. See ?

ISSUE: Does kit contain these cables?

  • One -48VDC power cable, from (one) Outdoor Unit to indoor equipment room. See ?

ISSUE: Does kit contain this cable?

  • Two fiber signal cables, from (one) Outdoor Unit to indoor equipment room. See ?

ISSUE: Does kit contain these cables?

7.5 Install Pole at Outdoor Site and Ground

7.6 Install Antenna at Outdoor Site

Non-Penetrating Roof Antenna Mounting Example The base station kit includes one dual-polarization, omnidirectional antenna.

Since throughput and coverage of WiMAX systems are highly influenced by the antenna location, care should be taken that the antenna is mounted so that siginificant portion of First Fresnel Zone is clear of obstructions. Ideally the antenna is mounted on the elevated structure providing clear line of sight to most of the intended coverage area.

The installation should be performed by qualified PE to ensure proper grounding and should follow NEC's mounting instructions.

7.7 Install Base Station Outdoor Unit

The Outdoor Unit (ODU) is mounted outdoors, near the antenna. It connects to the antenna with a coaxial cable, and connects to the Indoor Unit (IDU) with two fibers. In addition, it requires a -48 power feed and a protection ground.

The installation should be performed by qualified PE to ensure proper grounding and should follow NEC's installation instructions

7.8 Complete Wiring Between Outdoor Site and Indoor Equipment Room

7.9 Install Indoor Equipment Racks and Ground

7.10 Install 120VAC and -48VDC Power Feeds and/or Supplies

7.11 Install Base Station Indoor Unit

The Indoor Unit (IDU) is mounted indoors, typically in an equipment room. It connects to the ODU with two fibers, and to the Linux servers usxing an ethernet cable. In addition, it requires a -48 power feed and a protection ground.

The installation should be performed by qualified PE to ensure proper grounding and should follow NEC's installation instructions

7.12 Complete Wiring of Base Station Indoor Unit

7.13 Initial Check-Out of Antenna and Base Station Outdoor and Indoor Units

7.14 Install Linux Server(s) and Software

7.15 Connect Backbone Network

7.16 Provide Reference Client Platform

7.17 Inital Check-Out of Campus WiMAX Testbed

Attachments (5)