Data retransmission method used in confirmation information tran

Details Data retransmission method used in confirmation information tran Data retransmission method used in confirmation information tran

1997-10-24

2000-08-01

Patel, Ajit

Multiplex communications

Communication techniques for information carried in plural...

Adaptive

370469, 709227, 709231, 710105, G06F 1100, H04J 316

Patent

active

060977310

ABSTRACT:
A data retransmission method for a confirmation information transmission is provided which improves reliability of information transmission by preventing the loss of data when a transmission of data from layer 3 fails in layer 2. When transmitting layer-3-data from layer 3 to layer 2, layer 2 initiates timer observation and simultaneously transmits confirmation data to layer 1. If this transmission fails, a reply from layer 1 cannot be received and a retransmission procedure also fails, layer 2 notifies layer 3 of transmission failure, and simultaneously discards the layer-3-data. Layer 3 retransmits to layer 2 the layer-3-data which it previously transmitted, and layer 2 again transmits confirmation data to layer 1. If this transmission succeeds, layer 2 terminates the timer observation and notifies layer 3 of the successful transmission.

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patent: 5243595 (1993-09-01), Woest et al.
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patent: 5502712 (1996-03-01), Akita
patent: 5677918 (1997-10-01), Tran et al.
patent: 5790553 (1998-08-01), Deaton, Jr. et al.
"OSI--Computer Network for Tomorrow", by K. Tabata, et al., 1st Edition, published Sep. 8, 1998, Japanese Standards Association Inc., pp. 104-105 (See 3.2.6(4)"Sequence Nos." section and pp. 133-135 (3.3.5(2) "Data Transfer and Error Control" sequence control).

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