Method, system, apparatus and computer program product for interrupt scheduling in processing communication. In one embodiment the method includes: a sending computer program and a receiving computer program, coupling at least one registered signal identifier and a corresponding registered signal function with said receiving computer program; sending a communication including a request signal identifier by said sending computer program to said receiving computer program; receiving said communication sent at (B) by said receiving computer program; and performing said corresponding registered signal function without context switching of said receiving computer program if said request signal identifier received is coupled with said registered signal identifier. A system, router, computer program and computer program product are also disclosed.