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After 6LowPAN stack. Every node can have the different internet IPv6 address. So,

  1. Is 6LOWPAN stack is present in GATEWAY or sensor mote as well?

  2. In a case of sensor mote, is a GATEWAY required? Can't 6LOWPAN enable sensor to directly connect to IPv6 Router?

Correct me if I am missing some fact or data.

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In any case, a 6LoWPAN enabled Sensor Network needs a Gateway to interact with an end user who might be using a standard 802.11 WLAN or a 802.3 Ethernet based network.

The Gateway needs to translate the 6LoWPAN enabled IPv6 addresses into addresses that standard networks can understand and communicate. For instance, if a node with 6LoWPAN enabled on it with Header Compression has Address ::1 there needs to be some defined way to know how to access this sensor node over a connected network. For that you need a gateway which does translation for you.

Have a look into 6lbr by CETIC for some more implementation specific example.

Read this Awesome IPv6-WSN-Book for better understanding of 6LoWPAN

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  • Just follow up question. Before 6LowPAN you can address the WSN nodes. What advantage 6LoWPAN gives? I will read your resources if answer lies in them but else please just see...
    – Sahil Gupta
    Commented Aug 17, 2017 at 17:47
  • WSN nodes work on 802.15.4 have max. MTU of 127 Bytes IPv6 Addresses take a lot of space. 6LoWPAN compresses these IPv6 Addresses so that they can fit into the MTU and makes addressing simple within a network
    – Shan-Desai
    Commented Aug 17, 2017 at 17:54
  • Ok. I will check how they used to get address before 6LowPAN then.
    – Sahil Gupta
    Commented Aug 17, 2017 at 18:02
  • the First Chapter of the Book will give you all the idea.
    – Shan-Desai
    Commented Aug 17, 2017 at 18:04

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