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US 700MHz and Mexico APT Border Planning

US 700MHz and Mexico APT Border Planning. Patrick Kaiser Director Product Marketing NA. Benefits of 700Mhz APT Spectrum Plan. Key Benefits of 700 APT Plan 2 times the capacity in 15MHz compared to typical 10MHz bandwidth providing critical capacity as MBB quickly grows

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US 700MHz and Mexico APT Border Planning

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  1. US 700MHz and Mexico APT Border Planning Patrick Kaiser Director Product Marketing NA

  2. Benefits of 700Mhz APT Spectrum Plan • Key Benefits of 700 APT 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 MBB: 19x Characteristics of the two segmentation models for the 700 MHz band Reference Source: Cofetel

  3. US-Mexico Border Spectrum Coordination Challenges Greater challenge because of the overlap of DL/UL inter-systems 9MHz guard band provides cleaner 10MHz block 15MHz carrier would overlap with SDL Scenario1a,b Scenario1a,b UL DL scenario2 Scenario1a,b US Public Safety Challenge Guard gap: 16M UL DL 10M:verizon Guard band 9M scenario2 DL UL DL UL 10M:ATT/VZW scenario4 scenario3 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 BS1TX 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.

  4. US-Mexico Border Spectrum Interference Mitigation Options Antenna Down Tilt Antenna Down Tilt Added BS Filtering* *Not beneficial for co-channel interference. • 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 macro macro Vs. Small(er) cell Small(er) cell • 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)

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