Re: [lp-wan] I-D Action: draft-ietf-lpwan-ipv6-static-context-hc-03.txt

HI,

In draft-ietf-lpwan-ipv6-static-context-hc-03,
3.  Static Context Header Compression

Figure 1 based on [I-D.ietf-lpwan-overview] terminology represents the 
architecture for compression/decompression.

In draft-farrell-lpwan-overview-04,
2.1. LoRaWAN
[[Ed: Text here is from [I-D.farrell-lpwan-lora-overview]]]

In draft-farrell-lpwan-lora-overview-01,
2. Terminology
o End-device: a LoRa client device, sometimes called a mote. Communicates 
with gateways.

o Classes A, B and C define different device capabilities and modes of 
operation for end-devices. End-devices can transmit uplink
messages at any time in any mode of operation (so long as e.g., ISM band 
restrictions are honoured). An end-device in Class A can
only receive downlink messages at predetermined timeslots after each uplink 
message transmission. Class B allows the end-device
to receive downlink messages at periodically scheduled timeslots. Class C 
allows receipt of downlink messages at anytime. Class
selection is based on the end-devices’ application use case and its power 
supply. (While Classes B and C are not further
described here, readers may have seen those terms elsewhere so we include 
them for clarity.)

Based on the descriptions above, it is not clear for me to see whether the 
end-device requires the UDP facilities.

Regards,

Gengyu WEI
Network Technology Center
School of Computer
Beijing University of Posts and Telecommunications
-----原始邮件----- 
From: weigengyu
Sent: Saturday, May 13, 2017 11:42 AM
To: lp-wan@ietf.org
Subject: Re: [lp-wan] I-D Action: 
draft-ietf-lpwan-ipv6-static-context-hc-03.txt

Hi all,

There is a question, maybe a silly question.

Does the end-device in Lora, Sigfox, or the like networks need the
facilities of UDP protocol?
It is heard that it generally is simple one function device,
the port multiplexing is required or not?

Regards,

Gengyu WEI
Network Technology Center
School of Computer
Beijing University of Posts and Telecommunications
-----原始邮件----- 
From: internet-drafts@ietf.org
Sent: Saturday, May 06, 2017 2:01 AM
To: i-d-announce@ietf.org
Cc: lp-wan@ietf.org
Subject: [lp-wan] I-D Action: draft-ietf-lpwan-ipv6-static-context-hc-03.txt

A New Internet-Draft is available from the on-line Internet-Drafts
directories.
This draft is a work item of the IPv6 over Low Power Wide-Area Networks of
the IETF.

        Title           : LPWAN Static Context Header Compression (SCHC) and
fragmentation for IPv6 and UDP
        Authors         : Ana Minaburo
                          Laurent Toutain
                          Carles Gomez
Filename        : draft-ietf-lpwan-ipv6-static-context-hc-03.txt
Pages           : 36
Date            : 2017-05-05

Abstract:
   This document describes a header compression scheme and fragmentation
   functionality for IPv6/UDP protocols.  These techniques are
   especially tailored for LPWAN (Low Power Wide Area Network) networks
   and could be extended to other protocol stacks.

   The Static Context Header Compression (SCHC) offers a great level of
   flexibility when processing the header fields.  Static context means
   that information stored in the context which, describes field values,
   does not change during the packet transmission, avoiding complex
   resynchronization mechanisms, incompatible with LPWAN
   characteristics.  In most of the cases, IPv6/UDP headers are reduced
   to a small identifier.

   This document describes the generic compression/decompression process
   and applies it to IPv6/UDP headers.  Similar mechanisms for other
   protocols such as CoAP will be described in a separate document.
   Moreover, this document specifies fragmentation and reassembly
   mechanims for SCHC compressed packets exceeding the L2 pdu size and
   for the case where the SCHC compression is not possible then the
   IPv6/UDP packet is sent.

The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-lpwan-ipv6-static-context-hc/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-lpwan-ipv6-static-context-hc-03
https://datatracker.ietf.org/doc/html/draft-ietf-lpwan-ipv6-static-context-hc-03

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-lpwan-ipv6-static-context-hc-03

Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

_______________________________________________
lp-wan mailing list
lp-wan@ietf.org
https://www.ietf.org/mailman/listinfo/lp-wan

_______________________________________________
lp-wan mailing list
lp-wan@ietf.org
https://www.ietf.org/mailman/listinfo/lp-wan 