Changes between Version 53 and Version 54 of WiMAXInteg/CampusInstallation


Ignore:
Timestamp:
02/17/10 11:11:16 (10 years ago)
Author:
hmussman@bbn.com
Comment:

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  • WiMAXInteg/CampusInstallation

    v53 v54  
    153153The base station kit includes one dual-polarization, omnidirectional antenna, for operation in the 2.5GHz range.  [[BR]]
    154154 
    155 Install the antenna following Sec 1 - 5 of the [attachment:ANTENNA.pdf NEC Sector Antenna Installation Manual]
    156  
    157 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 significant 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.
     155To install the antenna:
     156 * Follow Sec 1 - 5 of the [attachment:ANTENNA.pdf NEC Sector Antenna Installation Manual]
     157 * Antenna height is limited to 6 m above the roof of the building, for reasons of aircraft safety.
     158 * 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 significant 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.
    158159
    159160ISSUE:  On which side of the pole should the antenna be mounted?  How should it be tilted?  How do these influence the coverage pattern? 
     
    164165The Base Station Outdoor Unit (ODU) is mounted outdoors, near the antenna. 
    165166
    166 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. 
     167It connects to the antenna with a coaxial cable, and connects to the Indoor Unit (IDU) with a dual optical fiber cable.  In addition, it requires a -48VDC power feed and a protection ground. 
    167168
    168169The installation should follow the instructions in Sec 3.1 - 3.3 of the [attachment:BS_INSTALLATION.pdf NEC Installation Manual for Base Station (IMN:BS)]
     
    172173
    173174 * 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 Sec 3.4.2.2, Fig 3-9, and Sec 6.3 of the [attachment:BS_INSTALLATION.pdf NEC Installation Manual for Base Station (IMN:BS)]
    174 
    175  * Connect two coaxial cables between Outdoor Unit and Antenna, including lightning protectors.  See Sec 3.4.2.3, Fig 3-9, 4-1, and Sec 6.4 of the[attachment:BS_INSTALLATION.pdf NEC Installation Manual for Base Station (IMN:BS)]
    176 
    177 ISSUE:  Does kit contain these cables?
    178 
    179  * Connect one -48VDC power cable from indoor equipment room to Outdoor Unit.  See Sec 3.4.1, Fig 4-1 and Sec 6.3 of the [attachment:BS_INSTALLATION.pdf NEC Installation Manual for Base Station (IMN:BS)]
    180 
    181  * Connect two optical fiber signal cablesfrom indoor equipment room to Outdoor Unit.  See Sec 3.4.1, Fig 4-1 and Sec 6.4 of the [attachment:BS_INSTALLATION.pdf NEC Installation Manual for Base Station (IMN:BS)]
     175 * Connect a coaxial cable between Outdoor Unit and Antenna, including lightning protectors.  See Sec 3.4.2.3, Fig 3-9, 4-1, and Sec 6.4 of the[attachment:BS_INSTALLATION.pdf NEC Installation Manual for Base Station (IMN:BS)]
     176 * Connect the -48VDC power cable from indoor equipment room to Outdoor Unit.  See Sec 3.4.1, Fig 4-1 and Sec 6.3 of the [attachment:BS_INSTALLATION.pdf NEC Installation Manual for Base Station (IMN:BS)]
     177 * Connect the dual optical fiber cable from indoor equipment room to Outdoor Unit.  See Sec 3.4.1, Fig 4-1 and Sec 6.4 of the [attachment:BS_INSTALLATION.pdf NEC Installation Manual for Base Station (IMN:BS)]
    182178
    183179
     
    185181
    186182Install (or identify) indoor equipment racks in the indoor equipment room, per Sec 2.3.3 of the [attachment:BS_INSTALLATION.pdf NEC Installation Manual for Base Station (IMN:BS)], with sufficient space to mount:
    187 
    188183 * Base Station Indoor Unit (5U). 
    189 
    190  * (Multiple) Linux Servers (1U)
    191 
     184 * Multiple Linux Servers (1U), 1 - 4.
    192185 * Ethernet (VLAN) switch (typically 1U), or utilize existing Ethernet switch capacity.
    193186
    194  
    195187These racks must be connected to building ground.
    196188
    197189
    198 
    199 === 8.10 Install 120VAC and -48VDC Power Feeds and/or Supplies ===
    200 
    201 
    202 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.
    203 
    204 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?
    205 
    206 Provide 110VAC feeds for Linux Servers, Ethernet switch (if provided), and -48VDC rectifiers (if provided). 
    207 
    208 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?
    209 
     190=== 8.10 Install 120VAC feeds and -48VDC Power Supplies ===
     191
     192 * Provide 110VAC feeds for Linux Servers, Ethernet switch (if provided), and -48VDC power supplies.
     193 * 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. 
     194 * Install -48VDC power supplies for Base Station Outdoor Unit (max 4A) and Base Station Indoor Unit (max 8.3A), and connect them to 110VAC feeds.
    210195
    211196