Ad hoc wireless configuration - MS Windows XP

Almost all notebook in our office are connected to our AP hotspot to get connect to the Internet and we all can share many resources depend on our sharing policy. One time there a problem in our hotspot caused by electrical problem that make our hotspot device broken. In the same time there was a meeting that is require all meeting member notebook connect to each other for presentation and data sharing.

Alternatively we are using adhoc to connect our notebook in one network and then the meeting are go on with no problem until it's finish.

So, what is this ad hoc?

ad hoc is a network connection method which is most often associated with wireless devices. The connection is established for the duration of one session and requires no base station. Instead, devices discover others within range to form a network for those computers. Devices may search for target nodes that are out of range by flooding the network with broadcasts that are forwarded by each node. Connections are possible over multiple nodes (multihop ad hoc network). Routing protocols then provide stable connections even if nodes are moving around (Source - Wikipedia).

How to create ad hoc?

Configuration on host notebook.

First, right click to Wireless icon then view all available network.
Next, click "Change advanced settings" then select "Wireless Networks" panel.
Next, remove all preferred networks then click add..

Fill Network name (SSID) with whatever name you want.
Next, select "open" for Network Authentication and select "Disable" for Data encryption.
Do not forget to check the "This is a computer-to-computer (ad hoc) network; access point are not used".

Done, you've create a ad hoc host, next you need is to set the static ip for the wireless to the same network with the other notebook client, and then just wait for the client to connect.

Configuration for the client notebook.

First remove all preferred network then use the same network ip for the wireless and then check if there is available network you've configured before (SSID you've set before) in the wireless network list, connect to it then you are done.

Once again this post just based on my experience, for the official articles try read this.