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AT T Release Specifications To Help Build 5G Cell Sites ((FREE))


AT T Release Specifications To Help Build 5G Cell Sites ((FREE))

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Remember when you lost all signal as the elevator doors closed With the majority of today's cellular traffic occurring indoors, many buildings have upgraded their cellular coverage so that those incidents are now few and far between. DAS and small cells have enhanced cellular in-building and large public venue coverage based on consumer demands for seamless connectivity. In fact, wireless is now often referred to in the industry as the fourth utility, as important to a building as water, electricity, or HVAC. This trend will only continue as the thirst for consumer connectivity continues.

Wireless networks are composed of cell sites divided into sectors that send data through radio waves. Fourth-generation (4G) Long-Term Evolution (LTE) wireless technology provides the foundation for 5G. Unlike 4G, which requires large, high-power cell towers to radiate signals over longer distances, 5G wireless signals are transmitted through large numbers of small cell stations located in places like light poles or building roofs. The use of multiple small cells is necessary because the millimeter wave (mmWave) spectrum-- the band of spectrum between 30 and 300 gigahertz (Ghz) that 5G relies on to generate high speeds -- can only travel over short distances and is subject to interference from weather and physical obstacles, like buildings or trees.

MmWave signals can be easily blocked by objects such as trees, walls and buildings -- meaning that, much of the time, mmWave can only cover about a city block within direct line of sight of a cell site or node. Different approaches have been tackled regarding how to get around this issue. A brute-force approach involves using multiple nodes around each block of a populated area so that a 5G-enabled device can use an Air interface -- switching from node to node while maintaining MM wave speeds.

Wireless service providers are beginning to install the small cell infrastructure and equipment necessary to move toward 5G, and these upgrades will lead to construction activity beginning soon on streetlights and utility poles in Naperville. Streetlight and utility poles are of adequate height and separation to accommodate 5G antennas without the need for installing additional poles across the City. Using existing streetlight and utility poles helps to minimize the aesthetic impact of the upgraded 5G service.

Even before an application is received, City staff members evaluate proposed small cell locations and consult with wireless service providers through an award-winning pre-application process. This process has been recognized with the Exemplary Systems in Government Award for Enterprise Systems from URISA, the Urban and Regional Information Systems Association. This early review helps providers choose optimal sites where small cells will not interfere with utilities or public safety communications.

C-band can fix this. The government auctioned off 280MHz of airwaves in the main C-band, and another 100MHz in 3.45, that are likely to go up to about a half-mile from each tower, so plenty of bandwidth for several different wireless carriers to have solid 5G using mostly existing cell sites.

Our first tests of Verizon's C-band show about a 0.37-mile range in very dense Queens, NY. That seems to be limited not by the power of the airwaves, though, but by Verizon not wanting its cell sites to interfere with each other. So half a mile in much of the country still feels good to me.

The toolbox provides functions and reference examples to help you characterize uplink and downlink baseband specifications and simulate the effects of RF designs and interference sources on system performance. You can generate waveforms and customize test benc


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