Abstract:
High technological advancement in the field of communication has introduced a new era in
wireless device interconnectivity. The advent of wireless M2M (Machine-to-machine,
mobile-to-machine and machine-to-mobile) facilitates networking between machines and
devices. It combines- communication, electronics, software and power technologies to enable
remote human and machine interaction with discrete systems and processes. Wireless M2M
can be supported by almost all wireless technologies that include GSM/GPRS, UMTS/3G,
LTE, WLAN, WiMAX etc. M2M over EDGE/GPRS is popular as its security features are
already available, provides flexibility in mobility and being low-priced. Wireless M2M offers
the opportunity of remote controlling a system as TCP/IP based protocols can run over the
GSM network like a traditional local area network (LAN) or wide area network (WAN)
environment. Already some costly tools are developed in the world market to remotely
control a particular power system.
Parallel approach has been taken into this project to remotely control a power device by
means of a cellular operator’s EDGE/GPRS network. It involves selection of appropriate
applications and ability to combine those to enable M2M interaction. A simple approach has
been pursued to develop a client-server model which is the basic of the entire concept. Client
and server will communicate to each other using wireless data network. Unique type of
Access Point Name (APN) is required to enable server-client interaction in which traffic will
not traverse to open Internet. Selection of appropriate application is also important as latency
in the air interface appends extra delay and propagation constraints play a major role in
packet loss which can distort control signal. To overcome these factors, data transfer rate
between client and server may be kept as minimum as possible. Again, move from
proprietary application to open source based application introduces security hole and leads
the system open to vulnerable attacks. To avoid security breach, GSM layer protection in
combination with application layer encryption can be used.
