Multiplex communications – Data flow congestion prevention or control – Flow control of data transmission through a network
Patent
1997-12-03
2000-10-03
Kizou, Hassan
Multiplex communications
Data flow congestion prevention or control
Flow control of data transmission through a network
370231, 370394, G01R 3108, H04L 1228
Patent
active
061282839
ABSTRACT:
A novel system and apparatus for transmitting data between the two nodes of a network is provided. The transmission is effected by using an error recovery protocol featuring a positive group acknowledgement. A sender unit on one node receives the user data and groups the data into consecutive cells, the cells being clustered into groups, each cell in a group being assigned a unique sequence number. The groups of cells are transmitted over a physical channel to a receiver unit on a different node. The receiver unit examines the cell stream and issues an acknowledgment message to the sender unit only when all of the cells in a group have been received. Once the sender unit has completed the transmission of a group of cells, it starts observing the physical channel for an acknowledgement message from the receiver unit. If after a predetermined time period the acknowledgement message has not been received, the sender unit transmits the group of cells again. This system allows to reduce the number of acknowledgement messages between the sender unit and the receiver unit while allowing low error-rate transmission between the nodes of the network.
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Cheung Derek Chung Lap
Leung Ming C.
Ozdemir Kadir
Sabaa Amr Gaber
Kizou Hassan
Nguyen Hanh
Nortel Networks Corporation
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