January 2018
Intermediate to advanced
524 pages
13h 33m
English
Content preview from Internet of Things for Architects
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Header compression and fragmentation
While the advantage of having virtually unlimited IP addresses for things is a significant milestone, placing IPv6 on an 802.15.4 link poses some challenges that must be overcome to make 6LoWPAN usable. First is the fact that IPv6 has a Maximum Transmission Unit (MTU) size of 1280 bytes, while 802.15.4 has a limit of 127 bytes. The second issue is that IPv6 in general adds significant girth to an already bloated protocol. For example, in IPv6 headers are 40 bytes long.
Note IEEE 802.15.4g does not have a limitation of 127 bytes for a frame length.
Header compression is a means to compress and remove redundancy in the IPv6 standard header for efficiency reasons. Normally, header compression is status-based, ...
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