Abstract: Systems and methods for roaming between a mobile node and at least one serving node connected to a network are disclosed. The present application provides a method for roaming between. In the system and method, a first communication is established between the mobile node and one of the serving nodes through a control server, when an Ethernet transceiver is used by the mobile node. Ethernet is used for communications between the mobile node and the control server, and a wireless communication technology for communications between the control server and the serving node. The control server also translates communications between Ethernet and the wireless communication technology. In the system and method, a second communication is established between the mobile node and one of the serving nodes with the wireless communication technology, when a wireless communication technology transceiver is used by the mobile node.

Abstract: Systems and methods for roaming between a mobile node and at least one serving node connected to a network are disclosed. The present application provides a method for roaming between. In the system and method, a first communication is established between the mobile node and one of the serving nodes through a control server, when an Ethernet transceiver is used by the mobile node. Ethernet is used for communications between the mobile node and the control server, and a wireless communication technology for communications between the control server and the serving node. The control server also translates communications between Ethernet and the wireless communication technology. In the system and method, a second communication is established between the mobile node and one of the serving nodes with the wireless communication technology, when a wireless communication technology transceiver is used by the mobile node.

Abstract: Systems and methods for roaming between a mobile node and at least one serving node connected to a network are disclosed. The present application provides a method for roaming between. In the system and method, a first communication is established between the mobile node and one of the serving nodes through a control server, when an Ethernet transceiver is used by the mobile node. Ethernet is used for communications between the mobile node and the control server, and a wireless communication technology for communications between the control server and the serving node. The control server also translates communications between Ethernet and the wireless communication technology. In the system and method, a second communication is established between the mobile node and one of the serving nodes with the wireless communication technology, when a wireless communication technology transceiver is used by the mobile node.

Abstract: A system and method of load balancing in an upstream proxy. Information is received from a plurality of downstream proxies. A list of downstream proxies is maintained. Weights are assigned to each of the downstream proxies in the list, the weight based upon information received from the downstream proxies.

Abstract: Systems and methods for roaming between a mobile node and at least one serving node connected to a network are disclosed. The present application provides a method for roaming between. In the system and method, a first communication is established between the mobile node and one of the serving nodes through a control server, when an Ethernet transceiver is used by the mobile node. Ethernet is used for communications between the mobile node and the control server, and a wireless communication technology for communications between the control server and the serving node. The control server also translates communications between Ethernet and the wireless communication technology. In the system and method, a second communication is established between the mobile node and one of the serving nodes with the wireless communication technology, when a wireless communication technology transceiver is used by the mobile node.

Abstract: Systems and methods for roaming between a mobile node and at least one serving node connected to a network are disclosed. The present application provides a method for roaming between. In the system and method, a first communication is established between the mobile node and one of the serving nodes through a control server, when an Ethernet transceiver is used by the mobile node. Ethernet is used for communications between the mobile node and the control server, and a wireless communication technology for communications between the control server and the serving node. The control server also translates communications between Ethernet and the wireless communication technology. In the system and method, a second communication is established between the mobile node and one of the serving nodes with the wireless communication technology, when a wireless communication technology transceiver is used by the mobile node.

Abstract: A system and method for Internet telephony between a caller station and a callee station are described. The caller station is connected to a first edge network via a first telephony interface, and the callee station is connected to a second edge network via a second telephony interface. An intermediate network is connected to the first edge network via a first router and is connected to the second edge network via a second router. The callee station is associated with a callee station number. The first router initiates the call in response to a setup message that includes the callee station number. A first gatekeeper, controlling the first router, and a second gatekeeper, controlling the second router, together mediate the process of setting up the call. A back end server, in communication with the first and second gatekeepers, stores the addresses and station numbers needed to set up the call.

Abstract: A method to support the assignment of a globally unique network public address and, optionally, a number of locally unique ports to a first private network subdevice having a private network address on a network access system from a second private network subdevice having a public network address using Realm Specific Internet Protocol, wherein the public network address is used by the first private network device to communicate with network devices on an external network.

Abstract: A system and methods are shown for selecting a packet data serving node (PDSN) for a mobile node in an Internet Protocol network. A network node receives a message associated with a mobile node. The message includes a service request parameter corresponding to a requested service. The network node uses the service request parameter to select the address of a packet data serving node (PDSN) offering the service. The network node then sends a response message directing a connection with the selected PDSN. The service request parameter may be an international mobile subscriber identifier (IMSI) that identifies a subscriber requesting a static IP address, in which case the network node directs a connection with a PDSN that offers an. Internet connection with the static IP address.

Abstract: A method and system for call monitoring in a wireless network by querying various network components for information about a call path through the wireless network. The network components in the wireless network may include foreign agent control nodes, home agent control nodes, packet data serving nodes, home agents, and/or authentication, authorization, and accounting servers. These network components may be queried to determine the foreign agent and the home agent to which a call is assigned. The foreign agent and the home agent may also define information about a call on the wireless network, i.e., the state of the call. Advantageously, the information provided by the foreign agent and the home agent may allow for monitoring a call path through the wireless network.

Abstract: A system and method are shown for load balancing across global network resources using an existing network protocol, such as Mobile IP, having a redirect feature. According to one method, each of a plurality of servers at a data center uses Mobile IP to obtain an IP address that is also provided to a content server site. Further, a content server site includes a plurality of IP addresses assigned to the plurality of servers and creates a load database including load data for each server. When a client request is received at the content server site from a client device, the content server site determines a network address of a server to process the client request based on the load data, and provides the network address of the server to the client device. When the client device receives the network address of the server, the client device sends an application request to the selected server, and the selected server sends an application response to the client device.

Abstract: A system and methods are shown for providing packet data serving node (PDSN) load balancing and fault tolerance. One exemplary method includes providing an access node with a plurality of packet data serving nodes and at least one system manager, receiving from a radio node on a first packet data serving node a registration request, determining that the first packet data serving node is unable to serve the registration request, and sending a packet data serving node selection request from the first packet data serving node to the system manager. The method further includes determining at the system manager a second packet data serving node to serve the registration request, and providing an address of the second packet data serving node to the first packet data serving node. The method further includes sending a registration reply message from the first packet data serving node to the radio node, where the registration reply message includes the address of the second packet data serving node.

Abstract: In a method and system of establishing mobile network communications in a network such as a mobile IP network, an agent node receives a registration request message that includes routing address fields such as a home address field, a home agent address field, and a care-of address field. The registration request further includes an extension field. The extension field of the registration request message includes at least one substitute address value. The agent node interprets the registration request message by selecting addresses from the message. When an address value in an address field is a void value, the agent node selects a substitute address value from the extension field. When an address value in the address field is not a void value, the agent node selects the address value in the address field. Using the selected addresses, the agent node establishes a mobile network session with the mobile node.

Abstract: A system and method for providing wireless Internet protocol access is provided. A network entity may be coupled to both a second generation and a third generation network access node. The network entity may intercept a request from a mobile node and determine whether the mobile node desires services from the second or third generation network. The network entity may then establish the proper communication session based on the type of session requested by the mobile node. By employing the network entity, service providers can effectively migrate from the second generation network architecture to the third generation architecture with minimal or no loss of services for users. Also, employing such a network entity enables users to operate a bi-functional mobile node, such as one that requires both second and third generation network access.

Abstract: A method and system of transferring data rate and state information of mobile nodes between access and home networks is provided. A mobile node may register with a foreign agent on a foreign network, by sending mobile node information, such as a data rate at which the mobile node operates and a dormancy status of the mobile node, to a radio access network, which forwards the information to the foreign agent. The foreign agent may then contact a home agent on the mobile node's home network to setup a call. The foreign agent may send the mobile node information, such as the data rate or the dormancy state, to the home agent during call-setup or during the call as well.

Abstract: A method and application programming interface for using multiple network addresses on a common physical layer. The host protocol stack supports multiple Internet Protocol interfaces. When a process makes a function call to create a new socket, a new IP address is associated with the socket. Each socket is then bound to an IP address that is distinct from the IP addresses bound to other sockets. This is in contrast to conventional sockets that are bound to a common IP address. In this manner, each process may be associated with a unique IP address. Such a configuration may useful in Internet telephony where each call process receives a unique private IP address in a virtual private network.

Abstract: A system and method for providing a handoff of a call from a mobile node. The call has associated state information. The call is established between the mobile node and a first RNN and the mobile node and a first PDSN. Thereafter, the mobile node roams and establishes a link between the mobile node and a second RNN. A second PDSN is selected to service the mobile node. A direct communication path is established between the first PDSN and the second PDSN. State information of the call is exchanged between the first PDSN and the second PDSN using the communication path.

Abstract: A system and methods are shown for providing packet data serving node (PDSN) redundancy. One exemplary method includes providing an access node with a plurality of packet data serving nodes and at least one system manager, establishing an N to 1 redundancy of active to standby PDSNs. Upon establishing a communications session with a mobile node, each active PDSN provides state updates to the standby PDSN including only non-recoverable data. Upon failure of any active PDSN, the standby PDSN reassigned as an active PDSN replacing the failed unit and assuming the communications session with the mobile node. The remaining active PDSNs are notified of the reassignment and transmission of updated state data is discontinued.

Abstract: A method and system for Mobile Internet Protocol (IP) device redundancy. As mobile devices roam away from a home network and change a connective status, mobility binding records are sent to a multicast network address on the home network. The multicast network address multicasts the mobility binding records to other active Mobile IP home agent control nodes, standby home agent control nodes and standby home agents on the home network. The method and system allows standby home agent control nodes or standby home agents to be transparently switched for active home agent control nodes or active home agents that fail without downloading or uploading large numbers of mobility binding records after a failure. The method and system may also help reduce failed calls (e.g., data sessions including Voice over IP (VoIP), H.323, etc.), network congestion and improve user satisfaction in Mobile IP systems.

Abstract: A method for determining the validity of an n-dimensional policy table in a router. The router may include a processor, a memory (e.g. ROM, flash memory, non-volatile memory, hard disk, etc.), and two or more policy rules stored in the memory. Each policy rule may have one or more dimensions (or parameters), designated generally by the symbol n. In accord with the method, the processor may make a determination whether any particular policy rule in the table intersects any subsequent policy rule in the table in every dimension n. If no rules in the table intersect in every dimension n, then the policy table is valid, and the router may operate normally.