Abstract:
Fully meshed virtual paths obtained with smaller number of settings, thus facilitating expansion of VPN service. A communication device in a virtual private network (VPN) having a VPN accommodation function for connecting an intra-organization network or inter-organization network through the Internet includes; a first means for generating a VPN address, a format of which includes both a VPN number for uniquely identifying a VPN in a certain scope and a closed address used in an organization or among organizations, either converting a packet header into a header having the above-mentioned VPN address or adding the above-mentioned VPN address to a packet header for transmission; and a second means for on receiving the packet having a header of the VPN address format, either converting the received packer into a packet format equivalent to an original packet format or removing a header having VPN address format.
Abstract:
In a multi-layer telecommunications system which includes an application layer and a transport layer, differing transport technologies are interworked without terminating the application layer signaling or without involving a technology interworking in the control plane of the application layer (e.g., without interworking in the application signaling). In various illustrated embodiments, the application layer is a radio network layer of a wireless telecommunications system. In at least some embodiments of the present invention a transport layer interworking function is situated on an interface between two nodes (26, N) of the radio access network (RAN). The interworking function can be located in a separate node, or within one of the Nodes having both ATM and internet protocol (IP) interfaces. There are numerous modes of implementing the interworking of the present invention, regardless of which interface is affected (e.g., an Iur interface, an Iu interface, or an Iub interface). A first interworking mode involves interworking with q.aal2 signaling. There are various ways or options of implementing the interworking with q.aal2 signaling. A first such example option is to use an IP specific signaling protocol over the IP network. A second example option is to use q.aal2 signaling over the IP network to/from the IP node. In one of its aspects, the present invention also provides an optimization feature in the event that nodes on both sides of the interface (Iu interface, Iur interface, or Iub interface) are IP-connected nodes. Another interworking mode involves obtaining address and binding identifier parameters to be included in application signaling messages by consulting a transport layer interworking gateway. Yet another mode of implementing interworking for the present invention involves tunneling.
Abstract:
Method and arrangement for communication of data packets between a first device (D1) in a first local network (A) and a second device (D2) in a second local network (B). where private IP addresses are used for devices present in the first and second local networks. A first gateway (100) of the first network updates(1:1) a local name server record (100a) with a domain name and an IP address of a second gateway (102) of the second network, each gateway having a local DNS function. When an outgoing DNS request is received (1:2) from the first device referring to a hostname of the second device, the IP address of the second gateway is determined (1:3) from the local name server record based on a domain name in the hostname. A DNS request is then sent (1:4) to the second gateway using the determined IP address, to obtain a current private IP address of the second device in a DNS response (1:5) from the second gateway. A DNS response is then forwarded (1:8) to the first device, referring to the current private IP address of the second device.
Abstract:
The present invention provides an electronic device system which combines the mutual functions without employing the mutual relationship of the master and slave, and which is high in convenience for the user. The vehicle AV device according to an embodiment of the present invention has a PIN cable which performs mutual communication with a PND through a wire or wirelessly, and a control microcomputer which recognizes a command sent from the PND through the PIN cable, and which performs the processing of the PND instead using the function of itself in accordance with the recognized command.
Abstract:
A translation engine is provided for efficiently translating SDH/SONET frames (101) to Ethernet frames (105) and vice versa. In accordance with one embodiment, a translation system includes a buffer (103) for holding SDH/SONET (101) and Ethernet frames (105). An Ethernet Media Access Control (MAC) address for a corresponding SDH/SONET TDM slot (103 E-103 F) further provided. A translation engine for translating SDH/SONET frames (101) into Ethernet frames (105) is in communication with an output interface. The SDH/SONET payload (101 A) is sent through a translation engine to translate the SDH / SONET payload (101 A) into an Ethernet payload (105 A). For translating from Ethernet to SDH / SONET, a reverse process occurs.
Abstract:
Erfindungsgemäss sind eine Einrichtung (E) und ein Verfahren zur Steuerung und/oder Überwachung von entlang eines Verkehrsnetzwerks angeordneten dezentralen Funktionseinheiten (DFE) vorgesehen, umfassend: a) ein übergeordnetes Steuerungssystem (30), das mit den dezentralen Funktionseinheiten (DFE) mittels Datentelegrammen (DT) Informationen austauscht, b) ein Datentransportnetzwerk (TN) mit einer Anzahl von Netzzugangspunkten (2 bis 16), wobei das übergeordnete Steuerungssystem (30) über mindestens einen Netzzugangspunkt (2, 4) an dem Datentransportnetzwerk (TN) angekoppelt ist; c) Kommunikationseinheiten (18 bis 28), die an einem Netzzugangspunkt (6 bis 16) angeschlossen sind, wobei: d) die dezentralen Funktionseinheiten (DFE) zu Untergruppen (A bis E) mit jeweils eigenem Subnetzwerk (NA bis NE) zusammengefasst sind; und wobei e) das Subnetzwerk (NA bis NE) jeder der Untergruppen (A bis E) an jedem seiner beiden Ende jeweils über eine Kommunikationseinheit (18 bis 28) und über einem Netzzugangspunkt (6 bis 16) an dem Datentransportnetzwerk (TN) angekoppelt ist. Auf diese Weise kann für die Ankopplung der dezentralen Funktionseinheiten ein digitales Transportnetzwerk genutzt werden, welches in jeder Weise robust gegen ein einfaches Fehlerereignis ist, dennoch eine sehr geschickte und adernsparende Verwendung von weit verbreiteten üblichen Stellwerkskabeln erlaubt und schliesslich auch nur eine vergleichsweise geringe Zahl von Netzzugangspunkten benötigt.
Abstract:
A method of performing a negotiation session on a modem connection. The method includes receiving a plurality of negotiation signals from the source modem, by a first gateway, forwarding at least some of the received negotiation signals from the first gateway to a second gateway, over a packet based network, receiving, by the first gateway, responses to the forwarded negotiation signals from the second gateway, forwarding the responses from the second gateway to the source modem, by the first gateway, and transmitting from the first gateway to the source modem, response signals to at least some of the received negotiation signals, without receiving a response to the at least some of the signals from the second gateway.