DAY 2 | Mobile Networks [VAP]

Date:20th January 2015

The second day started with discussion on Mobility protocols and Handover optimization.

 Dr. ASHUTOSH DUTTA

The key speaker for today was Dr. ASHUTOSH DUTTA. He is the renowned personality and a very experienced in the field of Wireless Communication. He is currently the member of AT&T . He is the co-author of the book "Mobility protocols and Handover optimization".

Today he tried to map the things that was told by Mr. Krishna Sirohi on the 1st day, on the basis of standardized protocols defined for the network system. He talked about the IP, TCP and network layers and explaining how the terminal devices are found when a source device tries to communicate with it based on IP/TCP. He talked about the differences between UDP and TCP. TCP is more reliable than UDP but TCP fails when we have large number of subscribers. He told us about the delays and loss of data (speech,video,info etc) which is there in the mobile networks and why it is there. He explained the PING PONG effect. In between Mr. Bhopendra Singh supported the explanation given by Dr. Ashutosh. There were discussion on cellular access characteristics and on Mobility Taxonomy. We saw the architectures of GSM and CDMA based networks. We closely studied the communication at every OSI layer and the edge to edge error Handling. Later on we studied DHCP, SIP. Although, SIP was covered more in detail. He showed the delay time in every layer that he tested on Linux OS. He stressed on the importance of learning Linux OS. He showed us the open source software Wireshark that is used to monitor the network that is recorded in a orderly fashion which seemed very easy to use but hard to study (;P).
The 2nd Day ended with the explaination of one of the projects that was explained by Mr. Bhupendra Singh in detail.


2nd day was much more challenging for us to study and understand each and every thing they told us. At present it seems difficult to analyse the things in a perfect way. But there is some kind of motivation also to know more. Sooner and later we will grasp aspects of networks studied so far.