Patent ID: 7006435
Filing Date: 2006-02-28
Classification: H04L,H04Q

Abstract:
1. A routing device for routing streams at a node in a packet transmission network, wherein each stream is transmitted with specified parameters for its loss and delay in the network, the routing device comprising: stream admission control circuitry for receiving a stream request and for reading: (i) said specified parameters and any values for loss and delay already incurred at preceding nodes in the network, or (ii) said specified parameters as modified to take account of loss and delay already incurred at preceding nodes in the network, to determine in conjunction with existing streams already being handled by the routing device whether to accept or reject the stream request; buffer circuitry including a plurality of buffers, wherein one or more of said buffers are allotted to said stream if the stream request has been accepted; and means for transmitting: (i) the stream request with modified values for loss and delay, or (ii) the stream request with modified parameters to take account of loss and delay incurred at this and preceding nodes in the network, if the stream request has been accepted, and for returning a fail signal if the stream request has been rejected.