Wi-SUN api documentation changes

Author: KariHaapalehto

docs/api/networkinterfaces/MeshInterface.md

@@ -2,16 +2,17 @@
 
 <span class="images">![](https://os.mbed.com/docs/development/mbed-os-api-doxy/class_mesh_interface.png)<span>MeshInterface class hierarchy</span></span>
 
-The Arm Mbed Mesh API allows the application to use the IPv6 mesh network topologies through the [Nanostack](../reference/mesh-tech.html#nanostack) networking stack.
+The Arm Mbed Mesh API allows the application to use the IPv6 mesh network topologies through the Nanostack networking stack.
 
-Mbed OS provides two types of IPv6 based mesh networks:
+Mbed OS provides 3 types of IPv6 based mesh networks:
 
 - 6LoWPAN_ND, loosely following the Zigbee-IP specification.
+- Wi-SUN, following the specification from Wi-SUN alliance.
 - Thread, following the specification from Thread Group.
 
-Nanostack is the networking stack that provides both of these protocols. For more information on the stack internals, please refer to the [6LoWPAN mesh technology](../reference/mesh-tech.html) section. Application developers use Nanostack through the Mbed Mesh API.
+Nanostack is the networking stack that provides these protocols. For more information on the stack internals, please refer to the [Thread](../reference/thread.html), [Wi-SUN](../reference/wi-sun.html) and [6LowPAN](../reference/mesh-tech.html) sections. Application developers use Nanostack through the Mbed Mesh API.
 
-The application can use the `LoWPANNDInterface` or `ThreadInterface` object for connecting to the mesh network. When successfully connected, the application can use the Mbed [C++ socket APIs](network-socket.html) to create a socket to start communication with a remote peer.
+The application can use the `LoWPANNDInterface`, `WisunInterface` or `ThreadInterface` object for connecting to the mesh network. When successfully connected, the application can use the Mbed [C++ socket APIs](network-socket.html) to create a socket to start communication with a remote peer.
 
 You can configure the mesh interface by providing values in `mbed_app.json`, as the [mesh configuration](../reference/configuration-mesh.html) section documents.
 
@@ -23,7 +24,7 @@ You can configure the mesh interface by providing values in `mbed_app.json`, as
 
 ### Supported mesh networking modes
 
-Currently, 6LoWPAN-ND (neighbor discovery) and Thread bootstrap modes are supported.
+Currently, 6LoWPAN-ND (neighbor discovery), Wi-SUN FAN and Thread bootstrap modes are supported.
 
 ### Network connection states
 
@@ -41,10 +42,12 @@ See the example application [mbed-os-example-mesh-minimal](https://github.com/AR
 
 ### Mesh example
 
-To learn how to use mesh, please see our [light control tutorial](../tutorials/light-control.html), which demonstrates a light control application, where devices can control the LED status of all devices in the network. You can build the application for the unsecure 6LoWPAN-ND or Thread network.
+To learn how to use mesh, please see our [light control tutorial](../tutorials/light-control.html), which demonstrates a light control application, where devices can control the LED status of all devices in the network. You can build the application for the unsecure 6LoWPAN-ND, Wi-SUN or Thread network.
 
 ### Related content
 
-- [Nanostack](../reference/mesh-tech.html#nanostack) technology reference material.
-- [6LoWPAN and Thread Mesh configuration documentation](../reference/configuration-mesh.html).
+- [Thread](../reference/thread.html) technology reference material.
+- [Wi-SUN](../reference/wi-sun.html) technology reference material.
+- [6LowPAN](../reference/mesh-tech.html) technology reference material.
+- [6LoWPAN, Wi-SUN and Thread Mesh configuration documentation](../reference/configuration-mesh.html).
 - [Light control tutorial](../tutorials/light-control.html).