(*) pronounced “chic”
It prevents the synchronization between elements communicating on the network. Synchronization is actually the operation that consumes the most bandwidth. In LPWAN networks, the nature of data flows is highly predictable. So, rather than saturating the bandwidth with this information, we found it smart to store these communication contexts both in the device and in the network management platform.
When the data is still too heavy to be transported under the given network conditions, SCHC incorporates a fragmentation. This splits the messages and manages their transmission in the network.
Compression : 80% of IoT frame structure is identical from a message to another. SCHC removes any redundant data.
Decompression: The frame sent contains the communication context and the key data to reconstruct the original message.
Outcome of the LPWAN Working Group at IETF, SCHC has been published as an RFC in April 2020.
The Internet Engineering Task Force (IETF) is the international body that defines the standards that guarantee the interoperability and evolution of Internet networks since 1986, in particular with the Internet protocol suite (TCP/IP). The IETF is behind the success of the Internet, by building a scalable system capable of connecting billions of devices and remaining operational after 30+ years.
SCHC is a compression and fragmentation framework tailored for LPWAN.
SCHC compression and fragmentation is a IETF standard by the LPWAN WG. The solution complies with RFCs 8724 and 9011.
IPv6 over LoRaWAN with SCHC is a prerequisite to DLMS over LoRaWAN as specified in the communication profile for LPWAN (Bluebook 14).
The LoRa Alliance leverages SCHC for IPv6 communication over LoRaWAN as specified in TS010-1.0.0.
Convert wired services or densify a network of devices with LPWAN connectivity and still keep the original legacy applications and communication protocols. Acklio’s solution adapts protocols with minimum engineering effort. Acklio’s SCHC implementation offers a standard adaptation stack for accelerated time-to-market and reduced TCO.
“We are pleased to cooperate with Acklio for IPv6 packet transmission based on B-CDMA technology. B-CDMA has been used in the form of a star topology for the MAC layer communication. Innovid has advanced this technology into mesh network technology. Through this collaboration, Innovid expects to expand its services to various IoT and IP based applications in the future.“
IPv6 over LoRaWAN®
The Internet protocols are now available in a standard implementation, using the SCHC adaptation layer. This provides new use cases, flexibility in development and integration of solutions – while benefiting from the efficiency of LoRaWAN.
“IPv6 support is a new milestone for LoRaWAN and the LoRa Alliance. It relies heavily on Acklio’s contributions to the IPv6 Task Force and is now proven on DLMS for smart metering. I want to thank Acklio for their support and contributions to driving the LoRaWAN standard forward.“
As specified by the LoRa Alliance, IPv6 operations requires the SCHC adaptation layer for mirroring operations of compression and decompression plus, if required, fragmentation frames, at both the device and the core network.
Pioneer & global leader of SCHC, Acklio offers the reference software to rollout DLMS solutions over LoRaWAN:
Learn more about the LoRaWAN technology by downloading the Actility “What is LoRaWAN” white paper