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Method and device for pre-determining time delay in node, and method and device for guarantee of time delay

A prediction method and technology of a prediction device, applied in digital transmission systems, electrical components, transmission systems, etc., can solve problems such as inability to guarantee different delay-sensitive services, difficulty, waste of network resources, etc., and achieve accurate prediction values ​​and calculation The effect of low load and low load

Inactive Publication Date: 2007-04-04
FUJITSU LTD +1
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Problems solved by technology

However, since DiffServ no longer provides quality of service guarantees for individual service flows, service providers have to adopt "over-provisioning" methods to guarantee end-to-end delays for delay-sensitive services
This "over-allocation" has the following disadvantages: 1) a large amount of network resources are wasted; 2) it is difficult to ensure "over-allocation" in the entire network while the network traffic continues to grow; 3) it cannot be sensitive to different delays Services provide different guarantees (for example, the delay guarantee required by IP telephony is much stricter than that required by video conferencing)

Method used

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  • Method and device for pre-determining time delay in node, and method and device for guarantee of time delay
  • Method and device for pre-determining time delay in node, and method and device for guarantee of time delay
  • Method and device for pre-determining time delay in node, and method and device for guarantee of time delay

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Embodiment Construction

[0034] The delay prediction technologies in the prior art are based on various assumptions about the network and traffic rather than their actual conditions. These technologies can be divided into the following three categories:

[0035]1. Assume that the EF traffic (accelerated forwarding traffic) in the network is very small, and its queuing delay is negligible;

[0036] 2. Assume that at each node of the network, EF traffic always fills the entire physical memory of the node;

[0037] 3. It is assumed that the physical memory of each node is unlimited and the scale of the network is limited.

[0038] The common point of these three types of technologies is that they all ignore the impact of network and traffic changes on delay, so the error between the predicted value and the actual delay provided by them is also large. Moreover, these techniques are proposed based on various assumptions that limit their applicability. For example, the first type of technology can only be...

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Abstract

The time delay predicting method is used in predicting the time delay of traffic flow in each jump in each path, and comprises: determining the maximum queue length of each jump; according to the maximum queue length of each jump, determining the maximum queue time delay of each jump.

Description

technical field [0001] The present invention relates to the quality of service (QoS) control in the telecommunication network, more specifically, relates to the technology of predicting the time delay of each node of the network and providing time delay guarantee for delay-sensitive services. Background technique [0002] Recently, more and more new services have been applied on the IP network. Among these services, many services (such as IP telephony, video conferencing, etc.) are very sensitive to the time delay experienced in network transmission, and excessive time delay will seriously affect the service quality of these services. Therefore, Quality of Service (QoS) guarantee has become a hot issue in current IP network control. There have been many research results in this field, most of which are based on one of the following two models: integrated service (Integrated Service) and differentiated service (Differentiated Service). The advantage of integrated service is...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L45/121H04L45/122
Inventor 李磊李阳春山田仁
Owner FUJITSU LTD
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