The method and system of the present invention provides an improved technique for replacing, implementing and managing computer-related assets. The light source unit includes a first light source emitting red light, a second light source emitting green light and a third light source emitting blue light. Thus, in spite of a high degree of fluorination, the polymer can be prepared in a simple manner and in high yield. The charging system then identifies a subscriber in the area of the RAN, identifies a service plan for the subscriber, and generates modified rules that deviate from predefined rules in the service plan of the subscriber in response to the congestion condition.