Service broker is a software component that maps users request to proper services.
By using the broker, users can access various services without any knowledge of the
services. However, design of the service broker for GCE (Global Computing
Environment) is quite difficult because a broker cannot cope with all the information
of services which are spread over the world. Thus, we need to build new
architectural foundations for global service brokering. In this paper, we propose a
scalable broker system for GCE based on the federation of personalized brokers. In
our broker system, every user can have a service broker. The broker maintains the
information of services related to the user and exchanges the information with
neighboring brokers if necessary. As a result, the broker can provide proper services
to users faster and a burden of brokers can also be decreased.