Issue link: https://read.uberflip.com/i/1423190
LoRa Alliance ® Whitepaper Page 42 of 49 LoRaWAN ® Gateways Radio Coexistence Issues and Solutions Copyright ©2021 LoRa Alliance, Inc. All rights reserved. www.lora-alliance.org • 864 – 869.2MHz in Russia It could be understood that a gateway manufacturer would want to avoid producing eight different versions of EMEA gateways to accommodate all the different above unlicensed bands. A unique gateway supporting the 863 – 876MHz band would be suitable for all the EMEA countries. One or more external cavity filters could be envisaged to accommodate each country's specifications regarding out-of-band emissions or out-of-band blocker rejection. Examples were provided in §7.1. In North America, both LTE (band 5 mainly) and unlicensed bands (902 – 928MHz) are clearly defined and harmonized across countries (USA, Canada, Mexico, Bahamas, Panama, etc.). Using embedded filters makes complete sense in this zone. The situation is more complex in the APAC zone, as we have different unlicensed bands in the 915 – 928MHz range but also different usages of the LTE bands 8, 5, and 20, as detailed in the table below: Unlicensed Band LTE DL Band Countries LoRaWAN Regional Parameters 915 – 928MHz 870 – 890MHz 935 – 960MHz Australia New Zealand Tonga AS923-1 AU915 915 – 918MHz 870 – 880MHz 925 – 960MHz Philippines AS923-3 917 – 923.5MHz 864 – 894MHz 950 – 960MHz South Korea KR920 918 – 923MHz 869 – 880MHz 925 – 960MHz Vietnam AS923-2 918 – 925MHz 869 – 894MHz 925 – 960MHz Solomon Islands AS923-1 919 – 924MHz 870 – 880MHz 925 – 960MHz Malaysia Myanmar AS923-1 920 – 923MHz 869 – 880MHz 925 – 960MHz Indonesia AS923-2 920 – 924MHz 925 – 960MHz Sri Lanka AS923-1 920 – 925MHz 870 – 890MHz 869 – 894MHz 930 – 960MHz Brunei Hong Kong Macao Singapore Taiwan Thailand AS923-1 920 – 928MHz 860 – 890MHz 935 – 960MHz Japan New Zealand AS923-1 922 – 925MHz 870 – 885MHz 930 – 960MHz Bangladesh AS923-1 923 – 925MHz 870 – 880MHz 927 – 960MHz Cambodia Laos AS923-1 It could be difficult for a gateway manufacturer to accommodate all the specific requirements of each country regarding unlicensed bands vs. LTE DL bands (12 configurations). A unique gateway supporting the 915 – 928MHz bands would be suitable for all the APAC countries. Several external cavity filters could be envisaged