Acklio

2bis rue de la Chataigneraie 35510 Cesson-Sevigne Cedex France ana@ackl.io

Ericsson

Stockholm Stockholm Sweden edgar.ramos@ericsson.com

Acklio

2bis rue de la Chataigneraie 35510 Cesson-Sevigne Cedex France sothy@ackl.io

lpwan Working Group The Static Context Header Compression (SCHC) specification describes a header compression and fragmentation functionalities for LPWAN (Low Power Wide Area Networks) technologies. SCHC was designed to be adapted over any of the LPWAN technologies. This document describes the use of SCHC over the NB-IoT channels, and provides elements for an efficient parameterization.

The Static Context Header Compression (SCHC) defines a header compression scheme and fragmentation functionality, both specially tailored for Low Power Wide Area Networks (LPWAN) networks defined in . Header compression is needed to efficiently bring Internet connectivity to the node within an NB-IoT network. SCHC uses an static context to performs header compression with specific parameters that need to be adapted into the NB-IoT channels. This document describes the use of SCHC and its parametrizing over the NB-IoT channels.

This document will follow the terms defined in , in , and the (TGPP23720). UE. User Equipment eNB. Node B. Base Station that controls the UE MME. Mobility Management Entity. Handle mobility of the UE S-GW. Serving Gateway. Routes and forwards the user data packets through the access network HSS. Home Subscriber Server. It is a database that performs mobility management P-GW. Packet Data Node Gateway. Interface between the internal with the external network TBD

TDB

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(Rule ID on L2) TBD

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The Rule ID the SCHC identifies are: * In the SCHC C/D context the Rule used to keep the Field Description of the header packet. In SCHC Fragmentation the specific modes and settings. And at least one Rule ID may be reserved to the case where no SCHC C/D nor SCHC fragmentation were possible. TBD

TBD

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## Fragmentation Headers TBD

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Rule ID DTag FCN Retransmission Timer Inactivity Timer MAX_ACK_Retries MAX_ATTEMPS TBD

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3GPP access security is specified in (TGPP33203).

TGPP23720 3GPP, “TR 23.720 v13.0.0 - Study on architecture enhancements for Cellular Internet of Things”, 2016. TGPP33203 3GPP, “TS 33.203 v13.1.0 - 3G security; Access security for IP-based services”, 2016.

Low Power Wide Area Networks (LPWAN) are wireless technologies with characteristics such as large coverage areas, low bandwidth, possibly very small packet and application layer data sizes and long battery life operation. This memo is an informational overview of the set of LPWAN technologies being considered in the IETF and of the gaps that exist between the needs of those technologies and the goal of running IP in LPWANs. This document defines the Static Context Header Compression (SCHC) framework, which provides header compression and fragmentation functionality. SCHC has been tailored for Low Power Wide Area Networks (LPWAN). SCHC compression is based on a common static context stored in LPWAN devices and in the network. This document applies SCHC compression to IPv6/UDP headers. This document also specifies a fragmentation and reassembly mechanism that is used to support the IPv6 MTU requirement over LPWAN technologies. Fragmentation is mandatory for IPv6 datagrams that, after SCHC compression or when it has not been possible to apply such compression, still exceed the layer two maximum payload size. The SCHC header compression mechanism is independent of the specific LPWAN technology over which it will be used. Note that this document defines generic functionality. This document purposefully offers flexibility with regard to parameter settings and mechanism choices, that are expected to be made in other, technology-specific, documents.