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Thread is an IPv6-based, low-power mesh networking technology for Internet of things (IoT) products. [1] The Thread protocol specification is available at no cost; however, this requires agreement and continued adherence to an end-user license agreement (EULA), which states "Membership in Thread Group is necessary to implement, practice, and ship Thread technology and Thread Group specifications."
6LoWPAN (acronym of "IPv6 over Low-Power Wireless Personal Area Networks") [1] was a working group of the Internet Engineering Task Force (IETF). [2] It was created with the intention of applying the Internet Protocol (IP) even to the smallest devices, [3] enabling low-power devices with limited processing capabilities to participate in the Internet of Things.
The payload length field of IPv6 (and IPv4) has a size of 16 bits, capable of specifying a maximum length of 65 535 octets for the payload. In practice, hosts determine the maximum usable payload length using Path MTU Discovery (yielding the minimum MTU along the path from sender to receiver), to avoid having to fragment packets.
IEEE 802.15.4 protocol stack. Devices are designed to interact with each other over a conceptually simple wireless network.The definition of the network layers is based on the OSI model; although only the lower layers are defined in the standard, interaction with upper layers is intended, possibly using an IEEE 802.2 logical link control sublayer accessing the MAC through a convergence sublayer.
The IPv6 subnet size is standardized by fixing the size of the host identifier portion of an address to 64 bits. The addressing architecture of IPv6 is defined in RFC 4291 and allows three different types of transmission: unicast , anycast and multicast .
IPv6 is the successor to the first addressing infrastructure of the Internet, Internet Protocol version 4 (IPv4). In contrast to IPv4, which defined an IP address as a 32-bit value, IPv6 addresses have a size of 128 bits. Therefore, in comparison, IPv6 has a vastly enlarged address space.
The Total Length field of IPv4 and the Payload Length field of IPv6 each have a size of 16 bits, thus allowing data of up to 65 535 octets. This theoretical limit for the Internet Protocol (IP) MTU, however, is reached only on networks that have a suitable link layer infrastructure. While IPv4 has no facilities to exceed its theoretical IP MTU ...
Static Context Header Compression (SCHC) is a standard compression and fragmentation mechanism defined in the IPv6 over LPWAN working group at the IETF. It offers compression and fragmentation of IPv6/UDP/CoAP packets to allow their transmission over the Low-Power Wide-Area Networks (LPWAN).