Design and implementation of the interworking function for call processing control between B-ISDN and N-ISDN

B-ISDN과 N-ISDN간의 호처리 제어 연동기능부 설계 및 구현

  • 유상신 (고려대학교 전자공학과) ;
  • 김중철 (고려대학교 전자공학과) ;
  • 김영궁 (고려대학교 전자공학과) ;
  • 박정식 (고려대학교 전자공학과) ;
  • 장경훈 (고려대학교 전자공학과) ;
  • 김덕진 (고려대학교 전자공학과)
  • Published : 1996.10.01


This paper focuses on the necessities of interworking and dervation of the requirements of interworking system for interworking between 64 Kbps based N-ISDN (narrowband ISDN) and B-ISDN(broadband ISDN). Furthermore, the design and the implementation of IWF (interworking function) are presentd. We analyze two ISDN signalling systems, and propose the architecture of interworking system. And then we make the baisc call procedure model between N-ISDN and B-ISDN, and verify the dynamic behaviors through the reachability tree of petri net. IWF is designed and implemented for transforming the differences between the two signalling systems. The operational confirmity of th eimplemented program was confirmed by the local test method. The performance of IWF was evaluated throguh the simulation language SLAM-II. As the result of evaluation shows, we confirm that the processing delay is maintained within 3 ms under the utilization 0.9.