WO2004086677A1 - A VoIP COMMUNICATIONS NETWORK TESTING METHOD AND APPARATUS - Google Patents
A VoIP COMMUNICATIONS NETWORK TESTING METHOD AND APPARATUSInfo
- Publication number
- WO2004086677A1 WO2004086677A1 PCT/EP2004/003683 EP2004003683W WO2004086677A1 WO 2004086677 A1 WO2004086677 A1 WO 2004086677A1 EP 2004003683 W EP2004003683 W EP 2004003683W WO 2004086677 A1 WO2004086677 A1 WO 2004086677A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- test
- connection
- node
- test pattern
- network
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
- H04L43/55—Testing of service level quality, e.g. simulating service usage
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
Definitions
- a VoIP communications network testing method and apparatus A VoIP communications network testing method and apparatus.
- This invention relates to a VoIP communications network testing method and apparatus.
- Voice over IP communications networks are networks which utilise the Internet Protocol to transmit voice over data networks.
- the data network may be the Internet or a company's intranet or managed networks provided by internet service providers. Such networks are popular since they provide one network which can handle both data and voice communications, there are potential cost savings and such networks enable the convenient provision of additional services.
- a method of testing a VQIP communications network comprising providing a test pattern, transmitting the test pattern over at least part of the network to a node and examining the test pattern received at the node.
- the test pattern may be transmitted from a first network node to a second network node and then the test pattern is examined or alternatively the pattern may be transmitted to a series of nodes ending in the originating node and then the step of examining the transmitted test pattern is carried out.
- the step of examining the transmitted test pattern may comprise a comparison of the transmitted pattern with a pre-stored test pattern.
- the test pattern may be considered as a test signal and in one embodiment of the invention is a .wav based signal.
- a test pattern is sent from a Time Division Multiplexing (TDM) side of a media gateway to another media gateway which loops the test pattern back.
- TDM Time Division Multiplexing
- test pattern is sent from within the IP network to a media gateway from whence it is looped back to the IP network.
- a test pattern is sent from a media gateway to a remote office test line device on the TDM network where it is then examined.
- a test pattern is sent from a media gateway to a remote office test line device in an IP network where it is then examined. In this way one path of the network may be tested rather than a loop involving two paths outward and return.
- FIGS 1 and 3 show VoIP communications networks operating in accordance with embodiments of the invention.
- FIGS 2 and 4 show data flow diagrams for the communications networks shown in figures 1 and 3.
- a VoIP communications network includes a Softswitch 2, network nodes 3, 4, media gateways 5, 6 a remote office test line device 7 and an SS7 network 8.
- the Softswitch 2 is one from the hiQ 8000/9200 TM family sold by Siemens Information and Communication Networks. A full specification for this equipment is available from the manufacturer under the following reference SURPASS hiQ 8000 Feature Description Guide, Part number A30828-X1121-A215-02-7671.
- the media gateways 5 and 6 are from the hiG 1200 TM family of products also available from Siemens Information and Communications Networks and specified in SURPASS hiG 1200 NMC-SMX Administration Guide For Solaris, Part number A30828-X1121-A186-03-7671.
- the ROTL device is in this embodiment a PowerProbe 6000 by Minacom.
- the PowerProbe 6000 is capable of examining speech patterns by providing Perceptual Evaluation of Speech Quality measurements based on ITU's P862 recommendations (Perceptual evaluation of speech quality (PESQ): An objective method for end-to-end speech quality assessment of narrow-band telephone networks and speech codecs, P.862, TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU, 02/2001).
- PESQ Perceptual evaluation of speech quality
- This embodiment of the invention tests the communications path quality by transmission of a test pattern from the ROTL device 7 to the media gateway 6 and back to the ROTL device where it is compared with the pattern that was sent.
- the test pattern is a fragment of speech held as a .wav file.
- the ROTL device 7 signals via the SS7 network via the A or F link to the Softswitch 2 that it wishes to perform a test to a . particular test NPA-NXX number.
- the Softswitch 2 interprets the test destination NPA-NXX into a unique test Media Gateway Control Protocol End Point in the media gateway 6.
- a Create Connection command "netwloop" is sent from the Softswitch 2 to the media gateway 6 to create a connection between the ROTL device 7 and the media gateway 6.
- the connection is a loop back connection resulting in a looped test path including the ROTL device 7, the nodes 3 and 4 and the media gateway 6.
- the Softswitch 2 then sends a command to create a connection on the ROTL device 7 with the mode set to send/receive. With the connection completed, the ROTL device 7 transmits a test pattern to the media gateway 6 from whence it is returned.
- the ROTL device then performs a comparison between the sent and the received patterns to determine the signal quality.
- Figure 2 shows the call flow involved in this embodiment of the invention.
- FIG. 3 shows a further embodiment of the invention in which like components bear the same reference numerals as the first embodiment.
- the ROTL device 7 is a Time Division Multiplexing (TDM) based device.
- TDM Time Division Multiplexing
- the ROTL device sends a signal via the SS7 network to the Softswitch 2 that it wishes to perform a test to a particular test NPA-NXX number.
- the Softswitch 2 interprets in a next step an originating point code and circuit identification code sent by the ROTL device 7 into a unique test MGCP end point. It further interprets the test destination NPA-NXX into a unique test MGCP end point in the destination media gateway 6.
- the Softswitch 2 sends a MGCP CRCX command to the gateway 6 with the mode "netwloop". Then the Softswitch 2 sends a MGCP command to the media gateway 5 to which the ROTL device 7 is connected to create a connection.
- the ROTL device 7 sends the test pattern over the looped test path between the device itself and the media gateways 5 and 6.
- the test signal is looped back from the media gateway 6 to the media gateway 5 and thence to the ROTL device 7.
- the ROTL device 7 compares the returned signal with that originally transmitted and analyzed to determine the quality. With the test completed, the Softswitch 2 is signalled and the call is released. The call flow is illustrated in figure 4.
- a pattern or test signal is sent from the ROTL device to another network element and returned to the device.
- the returned signal is then analysed.
- the test signal will have travelled on an outward and return path. It may be desirable in some circumstances to test just one path.
- the ROTL device 7 initiates a test and a network node transmits a test pattern to the ROTL device 7.
- the ROTL device 7 holds a copy of the original pattern against which the received pattern is compared to form an analysis of the quality of the communications path.
- a .wav file is provided to the ROTL device 7 and also the media gateway 6.
- the ROTL device 7 signals to the Softswitch 2 via the ' SS7 network that it wishes to perform a test to a test number NPA- NXX.
- the Softswitch 2 interprets the originating point code and the circuit identification code sent by the ROTL device 7 into an MGCP end point.
- the Softswitch then transmits to that gateway an MGCP command "send”.
- the Softswitch 2 also send a command to the ROTL device 7 to "receive”. With the connection completed, the test pattern is sent from the media gateway to the ROTL device 2 where it is received and analysed against a stored signal. When the test is completed the ROTL device 7 signals the Softswitch 2 to release the connection.
- the location in the network of a poorly performing path may be identified.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US45733903P | 2003-03-25 | 2003-03-25 | |
US60/457,339 | 2003-03-25 |
Publications (1)
Publication Number | Publication Date |
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WO2004086677A1 true WO2004086677A1 (en) | 2004-10-07 |
Family
ID=33098220
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/EP2004/003683 WO2004086677A1 (en) | 2003-03-25 | 2004-03-24 | A VoIP COMMUNICATIONS NETWORK TESTING METHOD AND APPARATUS |
Country Status (1)
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WO (1) | WO2004086677A1 (en) |
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WO2009132105A3 (en) * | 2008-04-23 | 2010-02-25 | Vonage Network Llc | Method and apparatus for testing in a communication network |
US8670313B2 (en) | 2006-08-22 | 2014-03-11 | Centurylink Intellectual Property Llc | System and method for adjusting the window size of a TCP packet through network elements |
US8687614B2 (en) | 2006-08-22 | 2014-04-01 | Centurylink Intellectual Property Llc | System and method for adjusting radio frequency parameters |
US8717911B2 (en) | 2006-06-30 | 2014-05-06 | Centurylink Intellectual Property Llc | System and method for collecting network performance information |
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