Title:
【発明の名称】パケット通信網用のユーザから網へのインタフェースプロトコール
Document Type and Number:
Japanese Patent JP2594641
Kind Code:
B2
Abstract:
A high capacity metropolitan area network (MAN) is described. Data traffic from users is connected to data concentrators at the edge of the network, and is transmitted over fiber optic data links to a hub where the data is switched. The hub includes a plurality of data switching modules, each having a control means, and each connected to a distributed control space division switch. Advantageously, the data switching modules, whose inputs are connected to the concentrators, perform all checking and routing functions, while the 1024x1024 maximum size space division switch, whose outputs are connected to the concentrators, provides a large fan-out distribution network for reaching many concentrators from each data switching module. Distributed control of the space division switch permits several million connection and disconnection actions to be performed each second, while the pipelined and parallel operation within the control means permits each of the 256 switching modules to process at least 50,000 transactions per second. The data switching modules chain groups of incoming packets destined for a common outlet of the space division switch so that only one connection in that switch is required for transmitting each group of chained packets from a data switching module to a concentrator. MAN provides security features including a port identification supplied by the data concentrators, and a check that each packet is from an authorized source user, transmitting on a port associated with that user, to an authorized destination user that is in the same group (virtual network) as the source user.
Inventors:
William Paul Reddenski
Garry Arthur Rhodiger
Scott Briar Steel
Warner Ulrich
Ronald Clair Wedding
Bruce Ronald Zell
Garry Arthur Rhodiger
Scott Briar Steel
Warner Ulrich
Ronald Clair Wedding
Bruce Ronald Zell
Application Number:
JP7868289A
Publication Date:
March 26, 1997
Filing Date:
March 31, 1989
Export Citation:
Assignee:
AT&T CORP.
International Classes:
G06F13/00; H04L9/32; H04L12/22; H04L12/28; H04L12/56; H04L29/06; (IPC1-7): H04L12/22; G06F13/00; H04L9/32
Domestic Patent References:
| JPS6262642A | ||||
| JPS6356038A | ||||
| JPS59158424A |
Attorney, Agent or Firm:
Masao Okabe (3 others)