Multiplex communications – Wide area network – Packet switching
Patent
1993-07-01
1995-04-11
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 941, 379111, 379112, 379113, 379114, 379121, H04L 1214
Patent
active
054065550
ABSTRACT:
In order to individually charge subscribers of a local area network (LAN) or LAN's, a charging apparatus is used in the LAN or in bridge apparatus interconnecting the LAN's to accumulate charges by counting subscriber packets transmitted therethrough as transmission packets additionally including particular packets for use regardless of intentions of the subscribers and includes a memory section in which type field values are preliminarily stored to indicate the particular packets. For one of the transmission packets, an address memory area is loaded with source and destination addresses included in the packet under consideration. A field value memory area is loaded with a type field value included in the packet in question. When the type field value coincides in the memory area and in the memory section, address combinations of such source and destination addresses are accumulated in an address accumulating memory as those included in the subscriber packets with the particular packets excluded from the transmission packets. Counts are accumulated in correspondence to the address combinations as the charges. Each time when an address combination coincides in the memory area and in the memory, one is added to the counts in correspondence to the address combination in question. If not yet included, an address combination in the memory area is additionally accumulated in the memory as a new entry.
REFERENCES:
patent: 4879742 (1989-11-01), Taniguchi et al.
patent: 4933931 (1990-06-01), Kokubo
patent: 5007048 (1991-04-01), Kowalk
patent: 5065393 (1991-11-01), Sibbit et al.
Blum Russell W.
NEC Corporation
Olms Douglas W.
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