Cell-Attached Frame Encapsulation Schemes for a Global Networking Service Platform

Junichi MURAYAMA  Hideo KITAZUME  Naoya KUKUTSU  Hiroyuki HARA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E80-B   No.10   pp.1429-1435
Publication Date: 1997/10/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Network Interworking)
Category: System architecture
Keyword: 
internetwork,  multimedia,  platform,  connectionless,  ATM,  

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Summary: 
This paper proposes cell-attached frame encapsulation schemes in which encapsulation processing can be performed without cell reassembly. The proposed schemes are especially useful for a global networking service platform to integrate widely distributed user LANs into a single internetwork. The platform itself is an ATM-based frame forwarding network composed of access networks and a core network. These elemental networks are interconnected via edge nodes. In order to improve network interworking performance, these edge nodes should perform encapsulation processing without cell reassembly. Our proposal solves this problem. In the proposed schemes, when the first cell of a cell-divided access network frame arrives at an ingress edge node, a core-header-cell is generated from the IP header described in the first cell payload. This core-header-cell is first transmitted and then succeeding incoming cells including the first cell are forwarded cell-by-cell as soon as they arrive. Since cell-by-cell forwarding-processing reduces frame forwarding latency and cell buffer capacity, these schemes are effective from the viewpoint of both performance improvement and cost reduction.