Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Bearer Backhauling

IP.com Disclosure Number: IPCOM000173329D
Original Publication Date: 2008-Aug-12
Included in the Prior Art Database: 2008-Aug-12

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

In networks mandatory and optional modification of media content, carried by one or multiple transport bearers, is processed by associated transport entities (e.g. MGW: Media Gateway). Not all processing functionalities are offered in all transport entities as this would be a waste of resources. At present, the media stream is terminated in the associated (predefined/pre-installed) transport entity. The media content is processed as requested or packet address manipulation is performed. Typically, when operating a communication or data network, transfer of signaling (control plane) and transport (user plane) information between network entities (nodes) is required. The user plane traffic can be controlled by one or several "roles" in order to run a certain application.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 28% of the total text.

Page 1 of 11

Bearer Backhauling

Idea: Peter Hagl, AT-Vienna; Franz Kalleitner, AT-Vienna

In networks mandatory and optional modification of media content, carried by one or multiple transport

bearers, is processed by associated transport entities (e.g. MGW: Media Gateway). Not all processing

functionalities are offered in all transport entities as this would be a waste of resources. At present, the

media stream is terminated in the associated (predefined/pre-installed) transport entity. The media

content is processed as requested or packet address manipulation is performed. Typically, when

operating a communication or data network, transfer of signaling (control plane) and transport (user

plane) information between network entities (nodes) is required. The user plane traffic can be

controlled by one or several "roles" in order to run a certain application.

A novel solution to the problem mentioned above is presented in the following. It allows the redirection

of user plane traffic towards a third party agent "on demand" without user interaction. To this end,

functionality such as modification, manipulation, sniffing, controlling, or authorization can be swapped

out from any transport entity to another entity, which can be either the same physical entity or not, by

backhauling the bearer from the concerned transport entity. This principle is illustrated in Figure 1. The

red lines indicate that the signaling and transport may be the same physical entity or not. The bearer

backhauling is illustrated by the thick line penetrating the signaling domain.

Depending on the service scenario, a temporary or persistent tunnel between signaling and transport

can be established to backhaul the media traffic form and to the concerned bearer entity. This can be

based on the IP (Internet Protocol) tunnel option for internet based transport networks. The

backhauling agents can be placed either at the same physical entity or at different physical entities. In detail the backhauling agent can be a new function which is typically controlled by one or more

applications, while an application can be placed either locally or externally. When placed locally the

application uses an internal interface to access a backhauling agent (Figure 2a), whereas when

placed externally the application can be physically placed somewhere else at a remote node (Figure

2b). In general such a function is called "role" in the following. Three roles making use of the proposed

bearer backhauling functionality are e.g. MGCF (Media Gateway Control Function), MRF (Media

Resource Function), and MSC Server (Mobile Switching Center Server), as depicted in Figure 3.

Entities belonging to the transport layer are for instance the MGW or the MRF.

A transport bearer may consist of one or several sub-bearers and each sub-bearer has to be assigned

to one LC (Logical Channel). The bac...