P2P applications on smart phones using cellular communications

In this paper we describe four P2P applications developed for smart phones, ranging from distributed computing to content sharing and search in closed and open user groups. Their common feature relies in the communication interface which has been cellular data transmission (SMS, HSCSD, respectively GPRS). Through our examples we highlight various aspects that application development on smart phones has to take into account, such as traffic efficiency, CPU load and social awareness. We discuss our main observations related to the experiments and highlight some promising directions for future mobile P2P applications. The discussed set of applications developed by us in the period between 2001-2005 cover the areas of distributed computing, large-scale content sharing in open communities, content sharing in closed groups, respectively keyword search in a social network of phones