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US 2004/0177087 A1Published application
Self-adaptive scheduling method and network element
AssigneeNokia Corporation
InventorsHaitao Wu, Keping Long, Shiduan Cheng, Jian Ma
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AssigneeNokia Corporation
InventorsHaitao Wu, Keping Long, Shiduan Cheng, Jian Ma
Estimating the term…
The present invention relates to a method and network element for scheduling data transmission in a packet data network, e.g. a differentiated services network. Data traffic of a predetermined traffic class is classified based on a predetermined traffic profile, e.g. responsive or non-responsive traffic, and an in-profile rate of the data traffic is estimated. Then, a weight determining a transmit order of queued data packets of said predetermined traffic class is adjusted according to the estimated in-profile rate. Thus, the data traffic is marked into different classes based on the traffic profile and a queue scheduler improves fairness between the classified flows in the packet data network. Thereby, enhanced fairness between traffic profiles can be achieved easily and effectively.
A method of scheduling data transmission in a network element of a packet data network, said method comprising the steps of:
A method according to any one of the preceding claims, further comprising the steps of queuing data packets of said in-profile traffic in a separate sub-queue, and scheduling said queued data packets based on said adjusted weight.
A method according to any one of the preceding claims, wherein said predetermined traffic profile is used to separate responsive traffic from non-responsive traffic.
A method according to any one of the preceding claims, wherein said predetermined traffic class is an AF class.
A method according to any one of the preceding claims, wherein said in-profile rate is a green packet rate of TCM marked packets.
A method according to any one of the preceding claims, wherein said estimation step is performed by periodically calculating said in-profile rate at a predetermined interval.
A method according to any one of the preceding claims, wherein said weight adjustment step is performed periodically at a predetermined or dynamic interval.
A method according to any one of the preceding claims, further comprising the step of using a priority scheduling for an EF class traffic, and sharing remaining bandwidth by said scheduling method.
A network element for scheduling data transmission in a packet data network, said network element comprising:
Dependencies are inferred from the claim text.