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LoRaWAN ® IPv6 Adaptation Layer Specification TS010-1.0.0 ©2022 LoRa Alliance ® Page 5 of 15 The authors reserve the right to change specifications without notice. 2 Introduction 113 114 This document describes how to use Static Context and Header Compression (SCHC), 115 defined in [RFC8724, RFC9011], as an adaptation layer to enable LoRaWAN end-devices to 116 use IPv6-based stacks over LoRaWAN. 117 118 Worst-case LoRaWAN application payload sizes are too small to transport IPv6 headers, let 119 alone additional upper layer headers or application payload. Furthermore, LoRaWAN does 120 not natively provide fragmentation and reassembly. An adaptation layer is therefore required 121 to enable IPv6-based applications over a LoRaWAN Layer 2 medium. 122 SCHC provides header compression and decompression as well as optional fragmentation 123 and reassembly between the application layer of an end-device and its corresponding 124 application northbound of the Application Server. SCHC was designed to be efficient over 125 mediums with Maximum Transmission Units (MTU) on the order of 10s-100s of bytes and is 126 able to cope with widely asymmetric, or even unidirectional, connectivity. 127 Using a SCHC adaptation layer, a LoRaWAN link can deliver the 1280-byte MTU required by 128 IPv6 and therefore can transport IPv6 and upper layer headers and payloads. 129 130