Patent ID: 6671255
Filing Date: 2003-12-30
Classification: H04L,H04Q

Abstract:
A method of controlling a data packet flow between at least two interconnected units, between which data packets are transferred in at least one direction, comprising the following steps:transmitting a backpressure message from a receiving unit that is permanently or temporarily unable to receive data packets to the unit or units from which it is arranged to receive data packets wherein said backpressure message further comprises a message level indicator indicating the number of levels passed by said backpressure message; for each unit that the message passes, changing or adding information to the message so that it comprises information about all units that the message has passed and further incrementing said message level indicator; and stopping all data packet flows intended to pass the unit from which the backpressure message originated, in the source or the sources of data packet flows, when a backpressure message is received.