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www.huawei.com US 700MHz and Mexico APT Border Planning Patrick Kaiser Director Product Marketing NA HUAWEI TECHNOLOGIES CO., LTD. Benefits of 700Mhz APT Spectrum Plan Key Benefits of 700 APT Plan US plan 2 times the capacity in 15MHz compared to typical 10MHz bandwidth providing critical capacity as MBB quickly grows Smartphones have increased business costs. Larger economies of scale promotes lower device costs. Dedicated capacity on demand rather than dedicated spectrum contributes to greater capacity on average Traffic is Booming Mobile Business MBB: 19x Web / Email P2P APT plan Global economies of scale – lower handset costs, simplified roaming 400 million users 4 billion users Amount of spectrum harmonised for large scale commercial use 37 per cent 83 per cent Amount of spectrum dedicated 16% dedicated to public safety and connectivity spectrum model 0%, spectrum not dedicated (capacity guaranteed) Number of 2 x 10/2 x 15 MHz 2/0 networks that can be supported 4/3 Cost of covering the entire population $150 million $800 million Minimum time it will take to deploy a network covering the 2.5 years entire population of Mexico City 1.5 years Video Characteristics of the two segmentation models for the 700 MHz band 2010 2011 2012 2013 2014 2015 2016 HUAWEI TECHNOLOGIES CO., LTD. Reference Source: Cofetel Page 2 US-Mexico Border Spectrum Coordination Challenges 9MHz guard band provides cleaner 10MHz block 15MHz carrier would overlap with SDL Scenario1a,b UL DL Guard gap: 16M DL 10M:verizon DL Guard band 9M DL 10M:ATT/VZW UL scenario2 scenario2 Scenario1a,b UL Greater challenge because of the overlap of DL/UL inter-systems Scenario1a,b US Public Safety Challenge UL UL DL Scenario1a: BS-BS Inter-channel interference – BS1 TX overlaps BS2 RX, most challenging. Requires separation distance at key cites (ex. San Diego-Tijuana), sharper BS filter, careful RNP. Will require detailed regulatory coordination in transition zone. Lower 10MHz will have lower interference due to 16/9MHz guard bands. Scenario1b: UE-UE Inter-channel interference – UE1 TX overlaps UE2 RX. Coordination is probabilistic (close proximity of UE1-UE2) and difficult to control. Scenario2: BS-UE inter-channel interference, channel of BS1 TX overlaps UE RX. Usually covered by existing treaties. Similar scenario as inter-technology interference. Requires traditional RNP. Interference to BS1 RX from UE2 TX usually considered negligible due to low TX power of UE. Similar to scenario1a. Scenario3: Interference from DTV51 significantly reduced due to 5MHz guard band. Scenario4: Spectrum in US currently owned by ATT, broadcast only, commercial plans unknown. Will likely require regulatory coordination. HUAWEI TECHNOLOGIES CO., LTD. Page 3 US-Mexico Border Spectrum Interference Mitigation Options Antenna Down Tilt Antenna Down Tilt Added BS Filtering* *Not beneficial for co-channel interference. macro macro Small(er) cell Small(er) cell Vs. Coordinated antenna orientation can substantially reduce interference as a lower cost option Required 90dB isolation for lower 10MHz block can be obtained with <1km ISD (54km if direct line-of-site) HUAWEI TECHNOLOGIES CO., LTD. Mitigation Options Small/smaller cells (reduced BS TX levels) within buffer zone operate at lower power levels as will UE. Required on both sides. RNP options Down tilt of antennas facing away from border reduce cell size and interference Orientation of antenna main load and back lobes reduce interference Consider restriction to lower 10MHz block near key cities (SD-Tijuana) reducing buffer zone to ~54km Added TX/RX BS filtering can improve BS-BS Inter-channel interference RNP restrictions unnecessary past ~60-70km inter-site buffer zone. Will make US 700MHz plan difficult in smaller LA countries Page 4 Thank you www.huawei.com Copyright©2011 Huawei Technologies Co., Ltd. All Rights Reserved. The information contained in this document is for reference purpose only, and is subject to change or withdrawal according to specific customer requirements and conditions.