LLN Fragment Forwarding and Recovery
draft-thubert-roll-forwarding-frags-01
| Document | Type | Expired Internet-Draft (individual) | |
|---|---|---|---|
| Authors | Pascal Thubert , Jonathan Hui | ||
| Last updated | 2013-08-29 (Latest revision 2013-02-25) | ||
| Stream | (None) | ||
| Formats |
Expired & archived
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| Stream | Stream state | (No stream defined) | |
| Consensus boilerplate | Unknown | ||
| RFC Editor Note | (None) | ||
| IESG | IESG state | Expired | |
| Telechat date | (None) | ||
| Responsible AD | (None) | ||
| Send notices to | (None) |
https://www.ietf.org/archive/id/draft-thubert-roll-forwarding-frags-01.txt
Abstract
In order to be routed, a fragmented packet must be reassembled at every hop of a multihop link where lower layer fragmentation occurs. Considering that the IPv6 minimum MTU is 1280 bytes and that an an 802.15.4 frame can have a payload limited to 74 bytes in the worst case, a packet might end up fragmented into as many as 18 fragments at the 6LoWPAN shim layer. If a single one of those fragments is lost in transmission, all fragments must be resent, further contributing to the congestion that might have caused the initial packet loss. This draft introduces a simple protocol to forward and recover individual fragments that might be lost over multiple hops between 6LoWPAN endpoints.
Authors
(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)