Multiplex communications – Data flow congestion prevention or control – Control of data admission to the network
Patent
1996-04-18
1998-05-19
Marcelo, Melvin
Multiplex communications
Data flow congestion prevention or control
Control of data admission to the network
370234, 370395, H04L 1226
Patent
active
057545308
ABSTRACT:
An ATM network carries several categories of services, each having its own traffic characteristics and performance requirements. The ABR (available bit rate) service category is the only existing one suited for high-reliability data communications, such as file transfer, LAN emulation, etc. The invention relates to the control of ABR traffic flow in an ATM network, to quickly utilize the bandwidth left unused by higher priority service categories while minimizing ABR cell loss, and maintaining fairness among ABR connections. On each ABR connection, the source end system periodically sends RM (resource management) cells to the corresponding destination end system which loops them back to the source. The ATM network may instruct the ABR sources of the exact rates it can support by modifying a certain field in the RM cells. The invention relates to techniques of deriving the proper explicit cell rate for each ABR connection.
REFERENCES:
patent: 5633859 (1997-05-01), Jain et al.
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Aboul-Magd Osama
Awdeh Ra'ed Y.
Marcelo Melvin
Northern Telecom Limited
Toyooka Yoshiharu
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