wiki:WiMAXInteg/CampusInstallation

Version 27 (modified by hmussman@bbn.com, 9 years ago) (diff)

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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 (principal) 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.

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

ISSUE: Do we also need GPS receiver and antenna, per NEC documentation? If we do not install it now, what might we be missing later?

7.3 Identify Indoor Equipment Room on Campus

An indoor site (e.g., an IT equipment room) should be identified on campus that meets the requirements listed in Section 1.3 of the NEC Installation Manual for Base Station (IMN:BS), and particularly the following requirments:

  • 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 optical 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. See Sections 3.5 and 2.6 of the NEC Installation Manual for Base Station (IMN:BS) for technical specifications of the Base Station Outdoor and Indoor Units.
  • 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 available Ethernet (VLAN) switching capacity, if possible.
  • 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:

ISSUE: Does this require a PE to certify proper grounding?

ISSUE: Does kit contain this cable?

ISSUE: Does kit contain these cables?

7.5 Install Pole at Outdoor Site and Ground

A pole must be provided and mounted at the outdoor site to safely and securely mount the Antenna and Base Station Outdoor Unit.

ISSUE: Does the kit contain the pole?

See Section 6.6 of the NEC Installation Manual for Base Station (IMN:BS)

See Section 1.2 of NEC Sector Antenna Installation Manual, which specifies a pole diameter between 48mm and 120mm.

For example, the pole may be suuported on a roof using an H bracket; see Section 6.1 of the NEC Installation Manual for Base Station (IMN:BS)

ISSUE: Does this require a PE to certify the safety?

The pole should be mounted in a position that optimizes the performance (e.g., the range) of the antenna.

ISSUE: Should the pole be placed to allow for the possible addition of a second or even third antenna?

The pole must be connected to the heavy cable that runs to the building ground, for lightning protection.

7.6 Install Antenna at Outdoor Site

Non-Penetrating Roof Antenna Mounting Example The base station kit includes one dual-polarization, omnidirectional antenna, for operation in the 2.5GHz range. The installation should follow the NEC Sector Antenna Installation Manual, Sections 1. through 5. 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.

ISSUE: All of this needs to be explained. How does its height influence the coverage? Are we limited to 6' above the structure? If so, how is this measured? On which side of the pole should the antenna be mounted? How should it be tilted? How do these influence the coverage pattern?

ISSUE: Do we also need GPS receiver and antenna, per NEC documentation? If we do not install it now, what might we be missing later?

7.7 Install Base Station Outdoor Unit

The Base Station 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 optical fibers. In addition, it requires a -48VDC power feed and a protection ground.

The installation should follow the instructions in Sections 3.1 through 3.3 of the NEC Installation Manual for Base Station (IMN:BS)

7.8 Complete Wiring at Outdoor Site and to Indoor Equipment Room

  • Verify connection of heavy ground cable, from building ground to grounding bar at Outdoor Site, and from grounding bar to pole, for lightning protection. Connect ground cable from grounding bar to the Outdoor Unit. See Figures 3-9, 4-1 and Sections 3.4.2.2 and 6.3 of the NEC Installation Manual for Base Station (IMN:BS)

ISSUE: Does kit contain these cables?

  • One -48VDC power cable, from Outdoor Unit to indoor equipment room. See ?
  • Two fiber signal cables, from Outdoor Unit to indoor equipment room. See ?

7.9 Install Indoor Equipment Racks and Ground

Install (or identify) indoor equipment racks in the indoor equipment room, with sufficient space to mount:

  • Base Station Indoor Unit (5U). See ?
  • Three Linux Servers (3 x 1U = 3U)
  • Ethernet (VLAN) switch (typically 2U), or utilize existing Ethernet switch capacity.

See Section 2.3.3 of the NEC Installation Manual for Base Station (IMN:BS)

These racks must be properly connected to building ground.

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

Provide -48VDC feeds for Base Station Outdoor Unit (max 4A) and Base Station Indoor Unit (max 8.3A), or else provide -48VDC rectifiers run from 110VAC feeds to supply these loads.

ISSUE: If -48VDC rectifiers are required, what is recommended? Individual units for each load? Sized to suuport a fully populated Base Station Indoor Unit? Or less?

Provide 110VAC feeds for Linux Servers, Ethernet switch (if provided), and -48VDC rectifiers (if provided).

ISSUE: 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. If this is not available, should one be added? If so, what is recommended?

7.11 Install Base Station Indoor Unit

The Base Station Indoor Unit (IDU) is mounted indoors, typically in an equipment room.

The IDU in the kit is equipped for 1-Sector Configuration, per Figure 2-3 of NEC Installation Manual for Base Station (IMN:BS), and includes:

  • One NW INTFC unit.

The NW INTFC unit connects to a -48VDC power feed and a protection ground, and supplies power to the entire Indoor Unit. See Section 2.2.2 and Figure 2-4 of NEC Installation Manual for Base Station (IMN:BS)

The NW INTFC unit connects to the ASN-GW function, supported on the Linux servers, using an ethernet cable that connects to the Ethernet switch, that provides the necessary VLAN.

  • One CHC unit.

Each CHC unit supports one Outdoor Unit and Sector Antenna. It connects to the ODU with two fibers. See Section 2.2.3 and Figure 2-5 of NEC Installation Manual for Base Station (IMN:BS)

ISSUE: Optionally, each CHC unit could support two Outdoor Units and Sector Antennas. Is there any reason to do this? Or, is this for redundancy?

ISSUE: Optionally, two additional CHC units could be installed. WIll there ever be areason to do this? To serve multiple sectors?

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 Ethernet (VLAN) Switch, or Identify Existing Capacity

7.15 Install Linux Server(s) and Software

7.16 Connect Backbone Network

7.17 Provide Reference Client Platform

7.18 Inital Check-Out of Campus WiMAX Testbed

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