Programmable scheduling for IP routers

A router and routing technology, applied in the field of IP network

Inactive Publication Date: 2005-09-14
NOKIA TECH OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This means extra effort and cost not only for operators but also for providers

Method used

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  • Programmable scheduling for IP routers
  • Programmable scheduling for IP routers
  • Programmable scheduling for IP routers

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Embodiment Construction

[0020] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part hereof, and show by way of illustration specific exemplary embodiments in which the invention can be practiced. Each embodiment has been described in sufficient detail to enable those skilled in the art to practice the invention, and it is to be understood that other embodiments may be utilized or other changes may be made without departing from the spirit or scope of the invention. Accordingly, the following detailed description is not intended to be limiting, and the scope of the present invention is only defined by the appended claims.

[0021] In the present specification and claims, unless the context clearly indicates otherwise, the following terms have the meanings explicitly associated with those described herein. The term "node" refers to a network element, such as a router. The term "importance" refers to the prio...

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Abstract

A scheduling system for IP routers is provided. A programmable scheduler for IP routers can support single stage and multistage scheduling. This allows flexible combinations of scheduling and widens dramatically the available QoS (Quality of Service) solutions to operators. With this kind of scheduling the router through a scheduling configuration interface (355) to support almost any known scheduling method or combination. Priority Queuing (PQ) and Deficit Round Robin (DRR) methods are used according to one embodiment.

Description

technical field [0001] The invention relates to an IP network, in particular to a programmable scheduling system of an IP router. Background technique [0002] The adoption of Differentiated Services and other Quality of Service (QoS) methods necessitates the deployment of several buffers for each router output link. In general, router providers have implemented one or possibly several different ways to configure the scheduling between these different caches of the router. However, this limits the possibilities these technologies offer to provider-specific solutions and makes it difficult and expensive for operators to modify and update their routers. [0003] Scheduling is an important part of any packet-based data network element such as an IP router. Scheduling is a function within an IP router that decides which queue to serve in turn. In fact, scheduling decides from which buffer to pick the next transmitted IP packet, which can significantly affect performance. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L47/2491H04L47/52
CPCH04L47/2491H04L47/2441H04L47/14H04L47/10H04L47/2408H04L12/5693H04L47/60H04L47/522H04L45/60H04L47/50H04W8/04
Inventor 尤西·鲁图亚尼·拉卡科皮维尔霍·I·雷伊塞宁
Owner NOKIA TECH OY
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