J. Murayama et al., CELL-ATTACHED FRAME ENCAPSULATION SCHEMES FOR A GLOBAL NETWORKING SERVICE PLATFORM, IEICE transactions on communications, E80B(10), 1997, pp. 1429-1435
This paper proposes cell-attached frame encapsulation schemes in which
encapsulation processing can be performed without cell reassembly. Th
e proposed schemes are especially useful for a global networking servi
ce platform to integrate widely distributed user LANs into a single in
ternetwork. The platform itself is an ATM-based frame forwarding netwo
rk composed of access networks and a core network. These elemental net
works are interconnected via edge nodes. In order to improve network i
nterworking 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 ce
lls including the first cell are forwarded cell-by-cell as soon as the
y arrive. Since cell-by-cell forwarding-processing reduces frame forwa
rding latency and cell buffer capacity, these schemes are effective fr
om the viewpoint of both performance improvement and cost reduction.