Patent ID: 7051107

Claim:
A computer system comprising: a message sending/receiving means for transferring a series of messages based on an application, a service layer for providing a specific additional service to the application in accordance with a policy of specific control or instructions to each message, a policy manager for holding and centrally managing various policies and supplying a policy corresponding to a message in accordance with a request for acquisition from the service layer, and a communication layer for transferring messages given the service by the service layer in accordance with the policy with the application of the other party, wherein the service layer is provided with an analyzing means dividing the parameters described in each message for specifying the message into (i) static parameters not changing over a long period and (ii) dynamic parameters changing over a short period and for extracting said static and dynamic parameters individually from each of said messages, and a requesting means for requesting the policy manager to provide a group of policies allocated to the static parameters using the extracted static parameters.