ERICSSON MGW PDF

Mass storage Micro processor DSP Processing boards Network interface boards which is a fully redundant telecom platform that can be used for several different products. Its robust, real-time control system and efficient cell transport system guarantee cost-effective applications that support time-division multiplexing, ATM and IP transmission. A cell-switching fabric allows functionality to be distributed across boards and subracks. A real-time router4, which is embedded in the media gateway, provides distributed forwarding at wireline speeds to all interfaces. Figure 4 shows a simplified view of the connection model. The connection handler, which keeps a logical view of the connection Ericsson Review No.

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Its robust, real-time control system and efficient cell transport system guarantee cost-effective applications that support time-division multiplexing, ATM and IP transmission. A cell-switching fabric allows functionality to be distributed across boards and subracks. A real-time router4, which is embedded in the media gateway, provides distributed forwarding at wireline speeds to all interfaces.

The real-time router handles IPv4, IPv6, header compression, IP security protocol IPsec , and differentiated services DiffServ ; provides MPLS edge functionality, including traffic engineering and protection; provides advanced firewall filtering and classification; and supports virtual private networks VPN.

Figure 4 shows a simplified view of the connection model. The connection handler, which keeps a logical view of the connection Ericsson Review No. The resource components can thus have any physical location in the node.

In this example, voice coding and echo-cancellation services are performed on the voice stream. By inserting different kinds of media framing and media stream components, it is possible to set up processing of virtually any media stream on demand. Only a small set of component types is needed, and it is not necessary to prepare in advance for all forthcoming combinations of functionality in a connection chain. The media gateway comprises several physical interfaces ranging from 1.

The interface to the switch fabric is not dependent on rate or technology. Operators can upgrade the switch fabric, interfaces, or processor boards without disturbing traffic. Three kinds of processor board are available Figure 5 : The general-purpose board GPB targets processes that execute on the distributed processor cluster.

The special-purpose board SPB is a workhorse for protocol termination. The Figure 6 Photograph of the media stream board. The media stream board MSB is a workhorse for processing media streams Figure 6. It is composed of several standard digital signal processors DSP. Nearly all media stream components are processed on this board.

To allow efficient and flexible resource handling, all media stream components in the media gateway are thought of as belonging to a common pool. Resource components have been developed for use with specific components Figure 5. The resource components can be allocated in needed numbers and type relative to the boards total processing capacity. The concept also allows for future hardware accelerationthat is, some resource components can be implemented in dedicated hardware to further increase capacity and reduce footprint.

Media framing components The resource components can be allocated to any of the processor boards. Internet protocol IP. User datagram protocol UDP. Real-time transport protocol RTP. Layer 2 tunneling protocol L2TP. Gateway tunneling protocol GTP. Time-division multiplexing TDM. The main task of the media framing components Box B is to convert protocols between different transmission networks and to adapt them to the media stream components Box C.

Using this same mechanism, it is easy to process the streams by inserting a media stream component. For example, with the outlined architecture, the GPRS network can easily be enhanced with real-time media streams.

Ericsson Review No. A signaling gateway function is needed to convey the signaling messages across different transport domains.

These messages are set up between the servers but the call is transmitted through the media gateway node. To reduce the footprint, the signaling gateway application which provides signaling interworking between IP, ATM, and TDM networkshas been co-located in the media gateway node.

The signaling gateway application also contains signal transfer point STP functionality, in order to relay signaling system no. All modes of the AMR voice codec are supported.

This allows operators to choose the subset of voice codecs they want to use in their networks. Echo cancellerecho cancellers attenuate echo generated from the conversion between four-wire and two-wire transmission in the PSTN; and reduce mobile crosstalk.

Multiparty callsupport for conversations between more than two parties. It also receives DTMF tonesfor example, tones that are to be used with the interactive messaging application.

Interactive messagingthe interactive messaging application provides subscribers with informative messages on special conditions in the network or conditions that pertain to the service in use. Chargingthe charging function supports the generation of volume-based charging information for GPRS services. Operation and maintenance The media gateway is managed by a Webbased thin-client application that can be run from a standard Web browser and Java virtual machine on any computer, locally or remotely.

The thin-client application displays a graphical presentation of the management application but does not store data on the node. The connection between the media gateway and the thin-client can be localover an Ethernet cable; or remoteusing a secure intranet.

Dedicated management applications are embedded in the media gatewaythat is, it contains all the software it needs to manage the node. The graphical user interface GUI has the same look and feel as all other network element interfaces in Ericssons thirdgeneration core network and radio access network.

It features a modular design that allows applications to scale from small base stations up to very large network nodes, such as a radio network controller or media gateway.

The CPP allows different applications to be co-located in the same network node.

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Its robust, real-time control system and efficient cell transport system guarantee cost-effective applications that support time-division multiplexing, ATM and IP transmission. A cell-switching fabric allows functionality to be distributed across boards and subracks. A real-time router4, which is embedded in the media gateway, provides distributed forwarding at wireline speeds to all interfaces. The real-time router handles IPv4, IPv6, header compression, IP security protocol IPsec , and differentiated services DiffServ ; provides MPLS edge functionality, including traffic engineering and protection; provides advanced firewall filtering and classification; and supports virtual private networks VPN.

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M-MGw product has been developed since year by people in Finland and Hungary. Background Traditionally the telecom business has been slow, characterised by standardisation and regulations. The product development has followed this business model with heavy upfront planning and big multi-year projects. Only a few people in product management had good understanding of the entire product. The result was organisational silos with multiple handover related challenges. The lead times and feedback loops within the product development were long.

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Yozshushura Number of supported Virtual Media Gateways has been increased. Expansions are still available for GMP V2. It is possible to use this feature for each interface type Iu, Nb and Mb-interfaces. With the feature Compressed Speech on Nb Interface it will be possible to carry speech over the core network in a compressed format.

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