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TS001-1.0.4 LoRaWAN® L2 1.0.4 Specification

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LoRaWAN ® L2 1.0.4 Specification © 2020 LoRa Alliance ® Page 69 of 90 The authors reserve the right to change specifications without notice. For a single omnidirectional antenna gateway, the value of InfoDesc is 0 when 2078 broadcasting GPS coordinates. For a site featuring sector antennas, for example, the first 2079 antenna broadcasts the beacon with InfoDesc=0, the second antenna with InfoDesc=1, 2080 and so on. 2081 13.3.1 Gateway GPS coordinate: InfoDesc=0, 1 or 2 2082 For InfoDesc=0,1 or 2, the content of the Info field encodes the GPS coordinates of the 2083 antenna broadcasting the beacon: 2084 2085 Size (octets) 3 3 Info Lat Lng Table 78: Beacon Info field format, InfoDesc=0,1,2 2086 2087 2088 The latitude and longitude fields (Lat and Lng, respectively) encode the geographical 2089 location of the gateway as follows: 2090 The north–south latitude SHALL be encoded using a two's complement 24-bit word, where 2091 −2 23 corresponds to 90° south (the South Pole) and 2 23 corresponds to 90° north (the North 2092 Pole). 2093 The east–west longitude SHALL be encoded using a two's complement 24-bit word, where 2094 −2 23 corresponds to 180° west and 2 23 corresponds to 180° east. 2095 Note: It is not possible to describe 90° north because 2^23-1 is the 2096 largest number that can be represented in two's complement notation. 2097 This approximately 1.2 m position error at the North Pole is considered 2098 small. 2099 2100 13.3.2 NetID + GatewayID 2101 For InfoDesc=3, the content of the Info field encodes the Network's NetID plus a freely 2102 allocated gateway or cell identifier. The format of the Info field is 2103 2104 2105 Size (octets) 3 3 Info NetID GatewayID Table 79: Beacon Info field format, InfoDesc=3 2106 2107 2108 2109 2110 2111 2112 2113

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