Dynamic encoding rate control minimizes traffic congestion in a packet network
AssigneeCodex Corporation
InventorsMichael G. Hluchyj, Nanying Yin
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Abstract
This invention is suited for a packet network that carries bursty data. A mechanism is coupled to an edge node for coding bursty information into a digital format at either a first coding rate of a second coding rate which is less than the first rate. A mechanism senses traffic overload of one or more intermediate nodes carrying the bursty informaton. A mechanism which is responsive to the overload sensing mechanism causes the coding mechanism to switch from the first rate to the second rate while a traffic overload is sensed. Thus, network demand requirements are reduced and the overload will be alleviated.
Claims12
A method for minimizing traffic overload at an edge node in a packet network that carries bursty traffic and includes intermediate nodes through which traffic is routed, the method comprising the steps of:
- coding bursty information at one edge node into a digital format for transmission as packets to another edge node, the coding including a first coding rate utilized except during a traffic overload and a second coding rate less than the first rate;
- determining at said one edge node if a reverse congestion indicator (RCIB) in the header of a packet sent from said another node is set thereby indicating a traffic overload condition in the transmission path from said one edge node to said another node;
- if said RCIB is set, utilizing said second coding rate at said one node to reduce the traffic input into the network.
A packet network that carries bursty traffic and includes edge nodes that input traffic into the network and intermediate nodes through which traffic is routed comprising:
- means for coding bursty information at one edge node into a digital format for transmission as packets to another edge node, the coding means including a first coding rate utilized except during a traffic overload and a second coding rate less than the first rate;
- means for determining if a reverse congestion indicator (RCIB) in the header of a packet sent from said another node to said one node is set thereby indicating a traffic overload condition in the transmission path from said one edge node to said another node;
- if said RCIB is set, said determining means utilizing said second coding rate at said one node to reduce the traffic input into the network.
Dependencies are inferred from the claim text.