ABSTRACT
In recent years, the growth in mobile computing technology has been explosive, and new wireless technologies have rapidly emerged. The desire to be connected anytime, anywhere, and in any way has led to an increasing array of heterogeneous systems, applications, devices, and service providers. It is envisioned that this heterogeneity is unlikely to disappear in the foreseeable future for two reasons. One is that the variety of application requirements makes it difficult to find a single optimal and universal solution. The other is that, in their eagerness to capture the market, competing organizations are releasing proprietary systems. As a result, the key to the success of next-generation mobile communication systems is the ability to provide seamless services in such a heterogeneous environment.
