The demand of information services is popular in recent years. However, the requested of correct answer in a mobile environment needs to have more attentions. This is due to the scope of query depends to the user location. In this paper, we propose an extension approach to handle the situation where a mobile user misses a query result at current time and expects to receive a next query result in the next interval time. The aim of this extension approach is to avoid redundant process in order to get a new query result. We show the efficiency of our proposed algorithm by giving some different examples and evaluations.