Correlation of media plane and signaling plane of media services in a packet-switched network
First Claim
1. A method for correlating at least one media data path and a signaling session of a service in a passive monitoring system of a packet-switched network, the method comprising:
- detecting in a signaling plane probe located in the packet-switched network a signaling session of the service, wherein the identification of the signaling session comprises identifying one or more media data paths of the media plane of the service based on signaling information of the signaling session monitored in the signaling probe,generating a signaling session identifier for the signaling session of the service at the signaling plane probe,registering the signaling session at a correlation unit by transmitting a registration message from the signaling plane probe to the correlation unit, wherein the registration message comprises the signaling session identifier of the signaling session and the one or more media data paths of the service identified by the signaling plane probe,receiving at the correlation unit a correlation request message from a media plane probe located in the packet-switched network, wherein the correlation request message indicates a media data path,determining by the correlation unit whether a signaling session of a service for the media data path comprised within the correlation request message is registered at the correlation unit, andif the signaling session is registered at the correlation unit, transmitting a correlation response message from the correlation unit to the media plane probe, wherein the correlation response message comprises the determined signaling session identifier of the signaling session associated with the media data path comprised within the correlation request message.
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Abstract
This invention relates to methods for correlating at least one media path and a signaling session of a packet-switched network and to an implementation of these methods in hardware and software. To overcoming one or more of the limitations and challenges on the correlation of signaling plane and media plane of services, the invention defines a key, which can be used for correlation of media streams and signaling sessions. The invention is based on a signaling probe identifying new services and associated media paths of the media plane by detecting their corresponding signaling sessions and determining for each service a signaling session identifier. The signaling probe registers the signaling sessions and their media paths at a correlation unit using the signaling session identifiers as a key, which allows a media probe to query the correlation unit for respective signaling session identifiers that correspond to media paths detected in the media plane traffic.
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Citations
14 Claims
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1. A method for correlating at least one media data path and a signaling session of a service in a passive monitoring system of a packet-switched network, the method comprising:
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detecting in a signaling plane probe located in the packet-switched network a signaling session of the service, wherein the identification of the signaling session comprises identifying one or more media data paths of the media plane of the service based on signaling information of the signaling session monitored in the signaling probe, generating a signaling session identifier for the signaling session of the service at the signaling plane probe, registering the signaling session at a correlation unit by transmitting a registration message from the signaling plane probe to the correlation unit, wherein the registration message comprises the signaling session identifier of the signaling session and the one or more media data paths of the service identified by the signaling plane probe, receiving at the correlation unit a correlation request message from a media plane probe located in the packet-switched network, wherein the correlation request message indicates a media data path, determining by the correlation unit whether a signaling session of a service for the media data path comprised within the correlation request message is registered at the correlation unit, and if the signaling session is registered at the correlation unit, transmitting a correlation response message from the correlation unit to the media plane probe, wherein the correlation response message comprises the determined signaling session identifier of the signaling session associated with the media data path comprised within the correlation request message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A signaling plane probe for use in a passive monitoring system of a packet-switched network, the signaling plane probe comprising:
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a monitoring unit adapted to receive packets of a service on the packet-switched network, a detection unit adapted to detect a signaling session of the service, by identifying one or more media data paths of a media plane of the service based on signaling information of the service comprised in the received packets, a processing unit adapted to generate a signaling session identifier for the signaling session of the service, a transmitter unit adapted to transmit a session registration message from the to a correlation unit to register the signaling session of the service at a correlation unit, wherein the session registration message comprises the generated signaling session identifier of the signaling session and the one or more media data paths of the service identified by detection unit. - View Dependent Claims (11, 12)
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13. A correlation unit for use in a passive monitoring system of a packet-switched network, the correlation unit comprising:
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a receiving unit adapted to receive a session registration message from a signaling plane probe, wherein the session registration message comprises a signaling session identifier of a signaling session of a service and the one or more media data paths of the service, and registration management unit adapted to register the signaling session, by storing the signaling session identifier message, the one or more media data paths of the service, optionally, a reliability indication of the reliability of the association between the signaling session and the media data path comprised in the correlation request message in a database, wherein the receiving unit is further adapted to receive a correlation request message from a media plane probe located in the packet-switched network, wherein the correlation request message indicates a media data path, and wherein the correlation unit further comprises a processing unit adapted to deter mine whether a signaling session of a service is registered in the database for the media data path comprised within the correlation request message; and
further adapted to generate a correlation response message comprising the determined signaling session identifier of the signaling session associated with the media data path comprised within the correlation request message, anda transmitting unit adapted to transmit the correlation response message to the media plane probe.
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14. A media plane probe for use in a passive monitoring system of a packet-switched network, the media plane probe comprising:
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a monitoring unit adapted to receive packets of a plural services on the packet-switched network and adapted to detect media data paths of media streams of the services from the received packets, a processing unit to generate a correlation request message indicating a media data path of a service detected by the monitoring unit, a transmitter unit adapted to transmit the correlation request message to a correlation unit, and a receiving unit adapted to receive a correlation response message from the correlation unit, wherein the correlation response message comprises a signaling session identifier of the signaling session associated with the media data path comprised within the correlation request message.
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Specification