摘要:
A method, apparatus, and system are described for accessing networked devices without accessible network addresses via Virtual IP (VIP) addresses. The system consists of a first Device Services Controller (DSC), featuring a Host Controller component that can make available a virtual network interface and corresponding virtual IP address (VIP) and having a first conduit manager to create a first outgoing TCP/IP conduit connection to a device service manager (DSM). When networking traffic arrives at the virtual networking interface with the associated VIP, the Host Controller component automatically processes and forwards that traffic to the DSM. The DSM processes and relays traffic from the first outgoing TCP/IP conduitconnection to a second DSC, which has a Device Controller component and a second conduit manager to create a second direct outgoing TCP/IP conduit connection to the DSM. An IP redirector in the DSM receives communication traffic from the first established TCP/IP conduit connection from the first DSC and then routes the communication traffic down the second established TCP/IP conduit connection to the second DSC based on a Virtual IP address to real IP address mapping stored in the registry of the DSM. The Host Controller component processes and delivers the network traffic from the DSM to the appropriate local networked device and if appropriate send back any return traffic back to the DSM, which will return it to the first DSC for delivery to the originating network device, Using this mechanism, it is possible for two networked devices on separate networks to communicate even if there does not exist a route to the network address of the target device.
摘要:
A method of providing data communication to a vehicle (1), the method comprising establishing a connection with a first base station (A) at a first time, and transmitting data packets from the vehicle to the first base station, establishing a connection with a second base station (B) at a second later time, and transmitting data packets from the vehicle to the second base station after said second time, receiving data packets from said first base station after said first time and after said second time.
摘要:
A method of providing data communication to a vehicle (1). The method comprises receiving a first data packet from a device associated with said vehicle (2) at an intermediate device (12,13,16,17), said first data packet comprising a first identifier identifying said vehicle, modifying said first identifier to identify said intermediate device and forwarding said modified first data packet from said intermediate device to a further device (4). A communications session between said device associated with said vehicle and said further device is established, and a session identifier is associated with the communications session, and said first data packet comprises said session identifier and said modified data packet comprises said session identifier.
摘要:
A method, apparatus, and system are described for accessing networked devices without accessible network addresses via Virtual IP (VIP) addresses. The system consists of a first Device Services Controller (DSC), featuring a Host Controller component that can make available a virtual network interface and corresponding virtual IP address (VIP) and having a first conduit manager to create a first outgoing TCP/IP conduit connection to a device service manager (DSM). When networking traffic arrives at the virtual networking interface with the associated VIP, the Host Controller component automatically processes and forwards that traffic to the DSM. The DSM processes and relays traffic from the first outgoing TCP/IP conduitconnection to a second DSC, which has a Device Controller component and a second conduit manager to create a second direct outgoing TCP/IP conduit connection to the DSM. An IP redirector in the DSM receives communication traffic from the first established TCP/IP conduit connection from the first DSC and then routes the communication traffic down the second established TCP/IP conduit connection to the second DSC based on a Virtual IP address to real IP address mapping stored in the registry of the DSM. The Host Controller component processes and delivers the network traffic from the DSM to the appropriate local networked device and if appropriate send back any return traffic back to the DSM, which will return it to the first DSC for delivery to the originating network device, Using this mechanism, it is possible for two networked devices on separate networks to communicate even if there does not exist a route to the network address of the target device.
摘要:
A signaling agency implementing method, in which the network system comprises media gateway and media gateway controller locating in different networks, and at least an agency device locating in different networks borders; under the control of the same media gateway controller, each media gateway has the sole message attributes of MEGACO signaling, the media gateway controller distinguishes different media gateways by the message attributes; the media gateways' own information is contained in the media gateway message attributes; media gateway controller contains information of both media gateway controller and media gateways in its message attributes, the agency device implements signaling transmission between the media gateway and the media gateway controller by utilizing the message attributes. According to the method of the present invention, any information of the media gateway is not necessary to the agency device, and the media gateway controller needs not to know whether there is an agency device existing between it and the media gateway, consequently, the present invention realizes the media gateway controller service easily.
摘要:
A simple means is used to realize a virtual network communication via an home network and Internet. A relay device 4 comprises bridge module 12 provided between a network protocol stack 13 and each of network devices 10, 11 for bridging for packets which are not addressed to the relay device or VLAN, or not broadcast request packets; a server address storage section 17 for storing the global address of a server; a tunneling session establishing section 20 for establishing a tunneling connection with the server based on the global address; a capsulating processing section 21 for capsulating a originating address and sending it to the server via the tunneling connection; and a virtual IP address/private IP address conversion section 22 for decapsulating a packet addressed to the relay device, converting a destination virtual network address included in this packet to a private IP address on the LAN of a client apparatus, and sending it onto the LAN via the bridge module.
摘要:
An implementing method for MMS NAT traversing includes the following steps: configuring public network address IP1 on NAT apparatus, configuring private network address IP2 and IP3 on the network port of proxy apparatus, and static NAT converting public network address IP1 and private network address IP3 of proxy apparatus; terminals in the private network configure the address of the system control apparatus as IP2; the proxy apparatus communicates with terminals in the private network using IP2; the proxy apparatus communicates with terminals in the public network through NAT apparatus and system control apparatus using IP3, and the proxy apparatus is notified the public network address IP1 of data packets that have been NAT converted by data configuration; the IP address in MMS signaling layer and the IP address in an IP packet head are respectively converted by proxy apparatus and NAT apparatus. According to the present invention, because the IP address in MMS signaling layer and the IP address in the IP packet head are respectively converted by proxy apparatus and NAT apparatus, implementing of MMS NAT traversing can be more effectively, and the cost of network establishment can be less.
摘要:
A front end of an IPv6 communication network includes a network entry point device (114) and a plurality of tunnel servers (118) which facilitate the communication of user information between a host computer (108) of an IPv4 communication network (110) and an IPv6 wireless communication device (130). The network entry point device is configured to direct a tunnel request from the host computer to a selected tunnel server, which establishes a tunnel connection with the host computer. For the tunnel connection, the data packets can be encapsulated based on SSH, PPTP, L2TP, IPSec or PP standards. The tunnel server facilitates the communication of user information between the host and the wireless device through the tunnel connection. The tunnel server also performs a dynamic routing protocol (DRP). In accordance with the DRP, the tunnel server updates a local routing table to reflect the newly established tunnel connection and broadcasts updated routing table information to the other tunnel servers and at least one router (126). In another technical aspect, a back end of the IPv6 wireless device facilitates communication with the IPv6 wireless device when it operates in an IPv4 wireless communication network. This can be achieved by a router (126) encapsulating packets to the temporary IPv6 - address assigned to a wireless device (130) using a temporary IPv4 - address.