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Found 3 results

  1. Samsung Telecommunications America 2.5 ghz 8T8R RRH & Antenna Model: RRH-V3 / RRH-B8 The equipment and antennas as posted are unique to Sprint Corporations nationwide 8T8R TDD-LTE deployment and there should absolutely be no mistaking these equipment for anyone elses. This specific setup uses a Samsung 8 Transmit 8 Receive (8T8R) Remote Radio Head (RRH) and a compatible 8T8R 2496-2690 mhz antenna. A Sprint Samsung B41 TDD-LTE (Spark) 8T8R Setup Samsung Network Vision 1.0 + 2.5 Setup NV 1.0 + 2.5 Setup with RADAR filters Close Look View from Back View from Below Special Case "Tri-Band Antenna" Setup Deployed for engineering reasons these sites do not deploy a dedicated 8T8R antenna for 2.5 but instead opts for a three frequency antenna that supports 800 MHz + 1900 MHz and 2500 MHz. Due to size constraints for the antennas they limit the 8T8R RRUs to 4T4R (4 Jumpers from radios to antennas) with the subsequent decrease of maximum capacity (60 MHz vs 120 MHz of 8T8R). Diagram of above setup Much thanks to el1117 & dkyeager & Oakley707 Full album
  2. Samsung TDD-LTE gear which are being utilized in Clearwire priority sites. . Clearwire - Samsung TDD-LTE RRH SLS-BD106Q & Antennas Samsung TD-LTE RRUs mounted behind BRS/EBS Antenna Sprint 2500-2600 mhz TD-LTE Setup Note the Antennas are much thicker and fatter than the antennas being utilized by Sprint Network Vision. Clearwire TD-LTE Base Station / Cabinet May be subject to change as TD-LTE sites start being integrated into the Network Vision setups. Happy Hunting! I'll clean the post up this weekend when I have more time. Courtesy of Sbolen from Missouri market. Samsung TDD RRH SLS-BD104Q1 Samsung TDD RRH SLS-BD106Q
  3. What are Protection Sites?

    Migrated from Original Forum. Originally Posted 24 July 2011 What are Protection Sites? by Sprint 4G Rollout Updates on Sunday, July 24, 2011 at 10:01am You keep reading around S4GRU about "Protection Sites." But what are protection sites, you ask? Sprint broadcasts it's 4G WiMax signal on 2.5GHz-2.65GHz (along with it's partner Clear/Clearwire). That's up to 150MHz of spectrum (variable by market). More than any other carrier in the country. Before 2007, 2.5GHz-2.65GHz was allocated by the FCC as EBS and BRS spectrum (Educational Broadband Service/Broadcast Radio Service). EBS was used by any public education organization free of charge on a first come, first served basis. However, this spectrum was relatively little used. At it's peak, only 100 education institutions actually utilized the spectrum for educational purposes. Most actually leased their spectrum to Clearwire for their pre-WiMax network. This was deemed a huge waste of spectrum by the FCC (and it was). When you consider the entire population of the U.S. and the total data capacity of the EBS spectrum, it was not even 1/100th of 1% utilized! In 2004, the FCC decided to reallocate the EBS/BRS spectrum for mobile internet and gave notice to the EBS/BRS license holders that in 2007 they would be repurposing the spectrum. EBS license holders could reapply with the broadband carriers in the 2007 reallotment. It was a confusing mess. In reality in the way it was structured, EBS spectrum winners were subleasing spectrum from the schools and universities. BRS spectrum licenses were purchased outright. In 2007 the EBS spectrum went out for bid. Two bidders ended up with the lion's share of the 150MHz of spectrum...Sprint and Clearwire. Sprint ending up with 60MHz of nationwide coverage. Clearwire with 90MHz of nationwide coverage. One of the conditions to the bidders is a clause called "Minimum Coverage Standards." For the EBS Spectrum, the FCC breaks up the 50 States and U.S. Territories into approx. 500 Basic Trading Areas, or BTA's (In other wireless spectrum, they use CMA's, or Cellular Market Areas). They use these to manage licenses for EBS spectrum. Licenses for each BTA are good for 10 years upon issuance. At 10 year intervals, they need to be renewed. At renewal, service provided is evaluated by the FCC. 99% of all renewals are approved. Some carriers have spectrum in all the BTA's (or CMA's). Some only have regions. Some have regions in one set of spectrum and other regions in other sections. It can be very messy and confusing to track FCC licenses. In 2008, Sprint and Clearwire received FCC approval and merged their EBS/BRS spectrum holdings into a singular holding of the 150MHz block and formed the joint-venture company Clear. Back to the Minimum Coverage Standards. The FCC mandated that a minimally acceptable amount of coverage be in every BTA by May 1, 2011. Clearwire started rolling out protection sites in earnest in early 2011. However, did not meet the Minimum Coverage Standards in all BTA's by May 1st, and started filing for extensions. Any winning bidder who did not provide minimally acceptable service within a BTA, will be subject to having the license revoked and the original license holder will be unable to ever regain it. This is very strong language about revocation. Minimum acceptable coverage to the FCC for this spectrum is: 30% of the BTA's Population Has Useable Service, or... 50% of the Geographical Area (Square Mileage) of the BTA has Useable Service. If one of these two items is met, then the license holder has met the Minimum Acceptable Coverage Standards required by the FCC for the EBS spectrum. Sprint/Clear 4G Basic Trading Area (BTA) Map showing all 500 BTA's in the U.S. The ones in green have at least (1) Sprint/Clear 4G tower in operation. The ones in white have no Clearwire service in operation. In the map above, you can see all the 500 BTA's in the United States. What Sprint/Clear have decided was to put up at least one tower every in every BTA in the country. So in 2011, they broke from the conventional rollout. They are deploying "Protection Sites" in all the BTA's. These are sites intended to keep the FCC at bay with the intention of trying to meet minimum acceptable service to maintain licensing. It appears that in larger population BTA's (250k+), they are deploying more than one protection site to meet the 30% population coverage minimum. Sprint/Clear are well on their way to being complete with the BTA Protection Site rollout before the end of 2011. They are averaging about 7 to 10 towers per week. So largely the areas in white will all be filled in green in short order. There will be a few exceptions. BTA's that have Clearwire's Pre-WiMax technology (like Reno, Dayton and Anchorage) will not receive protection sites. They already meet the FCC Minimum Coverage Requirements as the Pre-WiMax is broadcast on the same 2.5GHz spectrum. Most likely, the FCC will not give Sprint/Clear any grief over the minimum service clauses because they are attempting to do something. The clause is largely to prevent people from buying the spectrum and just sitting on it as an investment. The FCC really wants it just to be used. Most likely, the extension for Minimum Coverages will be given. The service requirements on the 700MHz spectrum are far more stringent than they were on the 2.5GHz spectrum. Verizon, AT&T and MetroPCS have less time to roll out. And the terminology used in it's FCC licensing doesn't have vague words like "minimum acceptable", but rather "substantial coverage."
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