Tessco Wireless Journal February March 2014 Page 3 TWJ Feb_March 2014

The entire product offering and your pricing is on TESSCO.com or call TESSCO at 800.472.7373. 3 The entire product offering and your pricing is on TESSCO.com or call TESSCO at 800.472.7373. 3 The entire product offering and your pricing is on TESSCO.com or call TESSCO at 800.472.7373. 3 www.tessco.com/go/twj February / March 2014 It's Time. technology is capable of meeting small cell requirements and can be engineered to back feed the power grid with excess power generated, creating green credits or off- setting power for utility payment. Power consumption is also a consideration and can hit the bottom line hard. Self- optimized network (SON) technology will also play a role in managing power use by turning cells off during low- demand / off-peak hours to save on power consumption. These are aspects often overlooked in the small cell / metrocell power discussion: impact your power solution lightning to protect sensitive equipment Remote or co-located with the small cell? mous feeds equipment Backhaul Let's assume that a small cell / metrocell site has been identified and all hurdles have been passed. The site is perfect, providing both a capacity offload and increasing geographical coverage, creating a perfect hotspot. Power has been identified and agreements signed. There's only one thing left backhauling the traffic. What's the best solution? That depends. The first and preferable option is fiber. Explore all your options to access fiber and be sure to consider the cost of installation and reoccurring lease expense. It may be that these expenses exceed other backhaul options or that the required site construction to access the fiber is blocked by the site owner or agree- ments. When you reach this point in your deployment, the next best option is a carrier-grade, street-level wireless backhaul solution. Going wireless has been identified as the leading op- tion for small cell / metrocell backhaul deployments based on the installation ease, capacity, and flexible architectures that solve multiple site constraints. Microwave and mil- limeter wave solutions are available and widespread use is anticipated. Both licensed and unlicensed solutions are deployable on a case-by-case basis with either line-of- sight or non-line-of-site. Of course there are tradeoffs. Licensed spectrum may or may not be available and there could be considerable expense associated with securing spectrum, and interference levels at the site may eliminate the unlicensed options. Wireless backhaul's flexibility can offer multiple to- pology options to overcome line-of-sight impediments. The backhaul access can use a point-to-point (PTP) or point-to-multipoint (PTMP) configuration with PTP used to overcome line-of-site constraints and to increase ca- pacity and PTMP helping with capacity by essential load balancing the traffic. Because of the proposed density and relatively short distances between small cell / metro- cell locations, it's possible to daisy chain, PTP, or create a PTMP or meshed network with each cell passing its traffic down the line where the final link to the macrosite or core handles the traffic from multiple small cell / metrocell ac- cess points. Additionally, this PTMP topology can be used to manage capacity, actively increasing load from path to path with demand. There are of course other backhaul performance re- quirements and operational considerations including: QoS thresholds, timing and synchronization, capacity growth, RF and physical security, and possible operation adminis- tration and management functionality. Not enough can be said around the importance of getting the backhaul piece of the small cell / metrocell trifecta right. It is absolutely the critical component when identifying the site location. Low cost, ease of install, and robust capacity will spotlight the leading backhaul solutions along with their ability to deliver acceptable QoS and OAM functionality. Selecting the best site location, and engineering the installation with power and backhaul requirements is only the beginning and prompts the need for partnerships, al- liances and agreements between all parties in the small cell ecosystem. TESSCO is prepared to support your efforts in this complex process. Considering the scale, the vast installation variables, and complexity of each cell rollout, TESSCO's broad infrastructure, power, and backhaul of- fering, along with carrier-class program logistics, will be instrumental in meeting the forecasted demand. Each site will require accuracy and redundancy to ensure on-time installation and turn up. TESSCO will work with your proj- ect teams to engineer, kit, preassemble, stage and ship based on your exact specifications. Contact your TESSCO Account Manager or visit www.tessco.com to learn more. Capacity & Coverage = Metrocells TESSCO FEATURE Small Cell / Metrocell Backhaul Spectrum Overview 6-42 GHz Microwave LOS PTP Typically licensed; the go-to-backhaul solution for macrocells. Expensive reoccurring license; high reliability; high CAPEX and OPEX. Unlicensed /registration licensed; short-range, high-capacity. Pure LOS requires expertise in alignment. Sensitive to movement requiring secure mounting. Narrow beam limits interference; susceptible to street-level interruptions from large vehicles and dynamic environment. LOS PTP 60-80 GHz Millimeter Wave Unlicensed and registered licensed; perfect for working in and around obstacles such as signage and architecture. Typically a PTMP solution; directional antennas can be used; PTP to increase capacity by sectoring the central site. Allows for great resilience in a dynamic environment; interference mitigated through network management; reduced OPEX with PTMP tree topology. PTP/PTMP NLOS Sub-6 GHz

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