Enhancement of binding update for mobile IP

The Mobile IP analysis model does not give much investigation of the situation when the correspondent node (CN) is also a mobile node. Triangle routing reflects the assumption of a stationary CN. When the CN is also mobile, the routing path is not a triangle any more. Moreover, the binding update (BU) between two mobile nodes is more complex than the binding update from a mobile node to a stationary node. When two mobile nodes transfer bulk data between them, the efficiency will be greatly affected by the binding update mechanisms. This paper presents our study on bulk data transfer between two mobile nodes. We present a comprehensive list of possible BU transmission methods, and we show our performance evaluations of them. By analyzing the results, we found several important factors that affect efficiency in terms of traffic load and average bit rate. Finally, we present our improvement on BU transmission method and its evaluation results. The results showed that our improvement is very helpful when the CN is mobile.