A new multi-access technique OFDMA-RL for remote lab system

The Remote Lab System (RLS) is a special combination between software and materials to give the chance for students to access remotely the laboratory equipment. With this system universities will be able to build a full online license and master's degree. Actually, the operational remote lab allows students access the equipment remotely. The number of beneficiaries of remote lab services continues to increase. The reservation process and the limit of the slot time given for each student became weaknesses for the RLS. In this paper, we propose and test a famous technique to share remotely the laboratory equipment between students at the same time. In fact, we test the Orthogonal Frequency Division Multiple Access (OFDMA) and exploit the good user separation done by the OFDMA technique, and also each users is assigned a frequency. The identification of each user or equipment lab will be based on the assigned frequency. Applying OFDMA to manage multi- user of our RLS allows us more than one student access our equipment lab. The system OFDMA allows students reused some equipment lab in multiple practical work or shared it between multiple-users. The limitation of our software and equipment lab present a hard barrier for us to test our solution for more than three users at the same time. In order to let our system stable we decide to give the possibility for only two users sharing the laboratory equipment at the same time.