A SIMULATION STUDY ON LAN MAN INTERCONNECTION WITH AN ATM NETWORK/

Recently as one of attractive applications in the B-ISDN era, LAN/MAN interconnection through an ATM network has been coming up because burs tiness of LAN/MAN data traffic is applicable to distinctive features o f cell based ATM network. In order to overcome a difference of the con nection mode, i.e., CL packet transfer of LAN/MAN and CO cell transfer of ATM network, a number of interworking and bandwidth allocation mec hanisms have been proposed. These methods, however, indicate both meri ts and drawbacks concerning with CL data transfer quality, network res ource efficiency and processing overhead in IWU/CLS and the network, a nd have been mostly evaluated only for a single IWU model. This paper aims at showing the most appropriate method of LAN/MAN interworking fo r IWU-IWU or IWU-CLSF connection. In the paper, some interworking issu es including a general qualitative assessment are clarified. We then e valuate the selected five interworking methods based on Bandwidth Rene gotiation (BR) and VC Establishment (VCE), which are combined with Tra ffic Enforcement Functions (TEFs) based on policing mechanisms and Cel l Loss Control (CLC) scheme. By transient and stationary simulation ap proach for a single IWU and an IWU-CLS connection model, the most appl icable method is indicated as a case study from view points of the com munication quality, effective use of the bandwidth and processing load .