Label handling in packet networks

Details Label handling in packet networks Label handling in packet networks

1994-03-10

1996-08-13

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

H04L 1256

Patent

active

055463878

ABSTRACT:
In a packet network for electronic transfer of data packets from one end station to another end station, there are, in the conventional way, a number of switch units. Each end station is connected to a switch unit, and the switch units perform the transfer of data packets along an established connection. The switch units are provided with switch ports on all of their connections. In these switch ports, a substitution is performed of labels of the data packets, both for data packets arriving to the switch unit and for data packets forwarded from the switch unit. The substitution prevents data packets belonging to different connections from having the same label and also offers distributed services in the data network. The data packet labels are constructed of a VPI field and a VCI field and, for data packets that arrive directly from or are sent directly to an end station, a GFC-field. In the substitution of the label of a data packet arriving to a switch unit, a table look-up is first performed in the associated switch port by way of the contents of the VPI field of the data packet. The result of the table look-up gives a direct information if the data packet belongs to a connection having a label comprising only a VPI field (VP connection), and then its contents are replaced by a record obtained in the table look-up. If the data packet has both a VPI field and a VCI field (VC connection), its VPI and VCI fields are replaced by new label portions obtained from a second table look-up.

REFERENCES:
patent: 3979733 (1976-09-01), Fraser
patent: 4218756 (1980-08-01), Fraser
patent: 4494230 (1985-01-01), Turner
patent: 4894822 (1990-01-01), Buhrke et al.
patent: 4947388 (1990-08-01), Kuwahara et al.
patent: 4995032 (1991-02-01), Demichelis et al.
patent: 5099475 (1992-03-01), Koziki et al.
patent: 5166926 (1992-11-01), Cisneros et al.
patent: 5287349 (1994-02-01), Hyodo et al.

Affiliated with

Also associated with

Rating

Label handling in packet networks does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Label handling in packet networks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Label handling in packet networks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1054791