Improving peer coordination quality in mobile P2P networks considering peer awareness and group synchronization: Implementation and performance evaluation of two fuzzy-based systems

Peer-to-peer (P2P) networks are a technology that makes two or more peers to communicate randomly in a network by using appropriate data and communication systems without the help of any central administration. P2P networks are very dynamic, where the peers join and leave the network freely. There are many issues in P2P networks, such as security, peers heterogeneity and the quality of coordination between peers. In this work, we have considered the latter and present a distributed event-based awareness approach for P2P groupware systems. We propose two Fuzzy-based Peer Coordination Quality Systems (FPCQS) for improving peer Awareness and Group Synchronization in mobile P2P networks according to four input parameters: Group Synchronization (GS), Peer Communication Cost (PCC), Peer Mobility (PM) and Time for Finishing the Required Task (TFRT). The output of our systems is Peer Coordination Quality (PCQ). We make a comparison study between FPCQS1 and FPCQS2. The simulation results show that when GS is increased, the PCQ is increased. But, by increasing PCC, the PCQ is decreased. When the PM is 50 units, the PCQ is the best. Considering the effect of TFRT parameter, we found that when TFRT is increased, the PCQ is decreased. Comparing the complexity, the FPCQS2 is more complex than FPCQS1. However, FPCQS2 considers also the TFRT, which makes the system more reliable.