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Network system

A network system and network technology, applied in the field of QoS assurance, can solve problems such as uncontrollable network QoS, and achieve the effect of low cost and guaranteed QoS

Inactive Publication Date: 2009-03-04
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the method described in Patent Document 3, like the method described in Non-Patent Document 1, there is no mechanism for controlling the network, and QoS in the network cannot be controlled.

Method used

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Experimental program
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no. 1 Embodiment approach

[0068] The first embodiment of the present invention will be described.

[0069] Fig. 1 is a block diagram showing the configuration of a network system according to the first embodiment of the present invention.

[0070] In this embodiment, sound and / or image are transmitted from the computer 101 to the computer 102. The service generated in the computer 101 is input from the border router 103 to the core network 112 of the carrier via the access network 110. The network 112 includes border routers 103 and 104 and core routers 105, 106, and 107.

[0071] The services input to the network 112 are output from the border router 104 via the core router 106 and the core router 107, and output from the network 112. The business output from the network 112 reaches the computer 102 via the access network 111. The QoS of the network 112 is managed by the resource management server 108.

[0072] In addition, sound and / or images are sent from the computer 121 to the computer 122. The servic...

no. 2 Embodiment approach

[0244] Next, the second embodiment of the present invention will be described.

[0245] The second embodiment is the same as the first embodiment except for the difference between the content of each message at the time of transmission of the measurement result (that is, at the time of feedback) and the processing content in each device. In the second embodiment, as explained below, when a QoS problem occurs, first, the application (especially the application on the receiving side) is involved in the solution of the QoS problem, and second, in the communication Multiple networks and / or multiple network devices on the path are shared to solve the problem. In addition, in the second embodiment, although an example is shown in which both the first and second features described above are applied to the network system of the first embodiment, any of the first or second features may be used. One is applied to the network system of the first embodiment.

[0246] Involving the application...

no. 3 Embodiment approach

[0268] In the first embodiment described above, the policy is set via the resource management server. However, the following changes may be added to the first embodiment. That is, in the sequence of FIG. 4C, each router can receive the QoS improvement target related to the router as an SNSLP message, so even if the resource management server is not used, it can set itself. This has the effect of preventing messages from being concentrated on the resource management server and becoming a bottleneck.

[0269] Next, a third embodiment of the present invention will be explained.

[0270] In the third embodiment, as the sequence at the time of transmission of the measurement result (that is, the feedback phase), the sequence shown in FIG. 4D is used instead of the sequence shown in FIG. 4C described above. In addition, in the third embodiment, similar to the communication from the computer 101 to the computer 102 in the first embodiment, data is transmitted from the computer 121 to the...

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Abstract

Provided is a network system which is coupled to first and second computers including: at least one network node; a network device; and a resource management server. In the network system, QoS requirements are set for a communication between the first and second computers; the second computer measures QoS of the first communication, and transmits the control information including an identifier of the first communication and a result of the measurement of QoS to the first computer; the network device captures the control information, and transmits to the resource management server a message including the identifier of the first communication and the measurement result which are extracted from the captured control information; and the resource management server estimates a cause of failure in satisfying the QoS requirements if the measurement result does not satisfy the QoS requirements, and sets QoS for the network node judged to involve the cause.

Description

Technical field [0001] The present invention relates to a network system for transmitting packets, in particular to a QoS (quality of service, quality of service) guarantee in the network. Background technique [0002] In the past, in network systems such as the Internet, it was difficult to ensure communication quality related to QoS between endpoints (that is, delay and jitter between terminals, between servers and terminals, etc.). However, NGN (Next Generation Networks), which is being standardized according to ITU-T and ETSI, is the goal of ensuring QoS between endpoints in new networks based on Internet protocols. [0003] If network services are unified like the existing telephone network, the necessary QoS specifications will be grasped in advance through the network. However, in consideration of various multimedia communications to be widely used in NGN, users of terminals and home gateways use a carrier network (NGN) to grasp the QoS specifications required for multimed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L29/06H04L47/20H04L47/52H04L47/6275
CPCH04L43/16H04L41/0893H04L47/20H04L41/5003H04L43/0852H04L47/10H04L41/5019H04L43/087H04L47/26H04L43/0829H04L41/0896H04L41/0894
Inventor 金田泰
Owner HITACHI LTD