HomeMy WebLinkAboutApplication APPLICANT 1/3/2014 (10) Site Justification
AT&T is proposing a new site, EG34 in the city of Springfield, Oregon. This is a AT&T service area that
has a significant service coverage gap as illustrated in Exhibit 1A. The Exhibit shows the proposed
site (Red star) and nearest adjacent sites to the North and NE (three Blue triangles). As can be seen,
there is a large coverage gap in all areas not shaded in Green.
This gap determination was a result of a combination of customer complaints, service requests and RF
design analysis as shown in Exhibit IE. The service coverage improvement is targeted mostly along
portion of Harlow Rd leading to the round about, intersecting with Martin Luther King Pkwy and also
along portion of Pioneer Pkwy north of Hwy 126. This site will provide the coverage from Mallard Ave
to 126 HWY and will cover the surrounding Residential areas and secondary streets. This still also
improve the coverage to the Gateway mall.
Exhibit 1113, demonstrates the minimum acceptable expanded level of service that will be provided
with the addition of the new proposed site with antenna Tip height at 120'. This is where an AT&T
handset can be reliably used to make and receive telephone calls in the presence of varying signals.
The site will serve in all newly shaded Green areas. The proposed antenna tip height of 120' ft. is the
minimum required to achieve the coverage objective. Reducing antenna height will reduce the sites
effectiveness and will make the proposed new facility ineffective as show in Exhibit IC with antenna
Tips at 70'. Notice the reduced coverage.
The other towers and alternate candidate locations NW & N of the proposed site, as shown in Exhibit
1D, will not fulfill the coverage gap objectives as can be seen. They are located in areas of existing
coverage and do not fill in the coverage gap.
Whip antennas are typically not used by wireless carriers anymore. The radiated signal is
omnidirectional and they provide no capacity relief. Therefore, sites are now sectored using directional
arrays where overall site capacity is immensely increased. Repeaters and microcells also do not have
the ability to handle capacity and their coverage area is limited due to lower powered transmitte
associated with them.
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Customer complaints and coverage issues.
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■ Acceptable Service Coverage
■ Se"ice Coverage Gap
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Proposed New Site
. Existing Site
Appendix
Engineering Network Design Parameters
The data below are the engineering design assumptions that were use in generating the
propagation map simulations. AT&T constantly does extensive propagation model
adjustments to insure they accurately reflect actual wireless signal conditions.
Technology Frequency Band Morphology- Indoor
f
TS LTE 700 8S0 11900 AWS WCS Dense Urban7 Urban Suburban Rural
x x x
High Band Morphology Signal Definitions (RSRP or RSCP): 1900, AWS, WCS
Dense Urban : -80dBm
Urban : -98dBm
Suburban : -108dBm
Rural : -116dBm
Low Band Morphology Signal Definitions (RSRP or RSCP): : 700, 850
Dense Urban : -70dBm
Urban : -90clBm
Suburban : -98dBm
Rural : -113dBm