Transmitting sequence numbers of information in a

专利名称：Transmitting sequence numbers of

information in a packet data transmissionsystem

发明人：David S. Drynan,David M. Baker申请号：US06/688110申请日：19841231公开号：US04617657A公开日：19861014

摘要：In a packet data transmission system, correctly received information packetsare acknowledged by piggybacking their sequence numbers onto information packetsbeing transmitted. The control field of each information packet includes a bit whichindicates whether or not there is a piggybacked acknowledgement. Acknowledgementscan also be transmitted separately in control packets having no information field. Eachacknowledgement consists of not only the sequence number of a correctly receivedinformation packet, but also the acknowledgement status of a plurality of precedinginformation packets whereby these can be negatively acknowledged if necessary. Thesequence numbers can have any one of three different sizes, for efficient transmission ofsequence numbers on transmission links of arbitrary transmission speed and length (andhence delay). The sequence number size which is used on any particular transmission linkis determined on set-up of the link in dependence upon the transmission speed and theround-trip delay of the link.

申请人：NORTHERN TELECOM LIMITED

代理人：R. John Haley

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