48 results about "Mobile ip protocol" patented technology

A micro-mobility network routing system and method implementing a protocol that extends the macro mobility support of Mobile IP to support micro mobility is disclosed which permits a more efficient and easily implemented Internet routing protocol for network devices to be affected. The macro mobility feature herein refers to the notion in which the mobile node gains access to the Internet, while retaining the same IP address. This concept is used only once when the mobile node enters the coverage area of a foreign domain (eventually its home domain). The concept of micro mobility within this context eases routing packets to the mobile node while its moves within the foreign network. The present invention implements these new features via the use of message compositions and protocol extensions that extend the prior art Mobile IP protocols.

A gateway, configured for providing connectivity between a wide area network and mobile routers within a mobile ad hoc network, is configured for registering the mobile routers with their respective home agents using a prescribed mobile IP protocol. The gateway identifies the mobile routers using a prescribed proactive mobile ad hoc network routing protocol. The gateway locates, for each identified mobile router, its corresponding home agent via the wide area network according to the prescribed mobile IP protocol, and registers the corresponding identified mobile router with the home agent according to the prescribed mobile IP protcol. The gateway can then forward a packet received from a home agent to the corresponding mobile router. Hence, the gateway provides mobile routers within a mobile ad hoc network with access to the wide area network, without any necessity for the prescribed mobile IP protocol to be implemented within the mobile routers.

A gateway, configured for providing connectivity between a wide area network and mobile routers within a mobile ad hoc network, is configured for registering the mobile routers with their respective home agents using a prescribed mobile IP protocol. The gateway identifies the mobile routers using a prescribed proactive mobile ad hoc network routing protocol. The gateway locates, for each identified mobile router, its corresponding home agent via the wide area network according to the prescribed mobile IP protocol, and registers the corresponding identified mobile router with the home agent according to the prescribed mobile IP protocol. The gateway can then forward a packet received from a home agent to the corresponding mobile router. Hence, the gateway provides mobile routers within a mobile ad hoc network with access to the wide area network, without any necessity for the prescribed mobile IP protocol to be implemented within the mobile routers.

In an access network which supports a mobile IP protocol, a packet data protocol context is opened at support node and a gateway node in order to establish a connection between a mobile node and a mobile IP foreign agent located at the gateway node. A mobile IP registration over the connection is initiated. The gateway node monitors whether the registration is successful or fails. The PDP context is deleted, if the registration irrecoverably fails. If the registration was unsuccessful but a retry could be successful, the PDP context may not deleted, but the registration is retried.

A network paging system and method implementing a Mobile IP protocol that allows transparent routing of IP datagrams sent by a Correspondent Node (CN) (any Internet node that wants to communicate with a Mobile Node) to a Mobile Node (MN) in the Internet is disclosed. The IP paging protocol disclosed is an extension to Mobile IP to allow dormant mode operation permitting conservation of battery power when not receiving / sending IP datagrams. The disclosed technique permits a mobile node to alternate between dormant and active modes to conserve its power resources. In the disclosed invention, the mobile node does not perform location updates as long as it is in dormant mode. In a preferred embodiment, the implement IP paging protocol is a Layer-3 protocol used to find the paging area, in which the MN is located and to alert MN to come out of dormant mode, whenever there is an incoming traffic. The present invention in some preferred embodiments defines a new paging protocol, which uses triggers from Layer-2 to gracefully bring down the Layer-3 interface. The disclosed IP paging protocol benefits from a link layer (Layer-2 or L2) triggers, which provide timely information to network layer (Layer-3 or L3) about the progress of events in Layer-2.

An improved method of maintaining data throughput during handoff in a wireless communication link operating with the Mobile IP protocol is described. A first base station initially servicing a mobile subscriber unit is associated with a first Mobile IP foreign agent that is registered with the Mobile IP home agent as a first mobility binding between the subscriber unit and the home agent. When the subscriber unit issues a request to be handed off from the first base station to a second base station, a second foreign agent associated with the second base station is registered with the home agent as a simultaneous binding with the first mobility binding between the subscriber unit and the home agent. This permits both foreign agents to simultaneously receive a sequence of data packets from the home agent. Before handoff is executed, the data packet sequence routed to the second foreign agent is stored at the second base station. After handoff is complete, such stored packets are forwarded to the subscriber unit starting with a predetermined numbered packet in the stored sequence, and the first foreign agent is de-registered with the home agent.

In one embodiment, accounting information for a mobile node operating according to Mobile IP Protocol is updated. A network device that supports Mobile IP composes a request packet for the mobile node. The request packet identifies the mobile node and includes at least one counter associated with accounting information pertaining to the mobile node. The request packet is then sent to a server adapted for performing accounting. The server then logs the accounting information for the mobile node. The server may then send a reply packet to the network device acknowledging logging of the accounting information pertaining to the mobile node. A bill for Mobile IP services may then be generated from the accounting information.

Methods, systems and computer program products for load balancing using Mobile Internet Protocol (IP) Version 6 are provided. A request for a connection is received from a client at a routing stack. A Mobile IP Version 6 Binding Update message is transmitted from the routing stack to the client responsive to the received request. The Binding Update message identifies a selected target stack so as to allow the client to communicate directly with the target stack bypassing the routing stack.

A mobile IP location server that retrieves the location of a mobile device based on the public IP address that a mobile device is using. A mobile IP location server comprises a mobile location protocol interface, an identifier resolver, and a location manager. The mobile location protocol interface interacts with location applications and receives and responds to location requests. The identifier resolver converts a device's public IP address to a real mobile identifier (e.g. MSISDN) and performs address conversion by either interacting with an HTTP proxy server or querying a network address translation (NAT) table. The location manager retrieves the location of a mobile device given the device's real mobile identifier (e.g. MSISDN). A web application requests mobile IP location services by transmitting an IP request to the mobile IP location server. An IP location request contains a mobile device's public IP address, port number, and any application specific information.

The present invention is to reduce consumption of band resources and delay in communication as a whole. A functional configuration of a home agent according to the present invention will be described as follows. A Mobile IP protocol process portion 902 has a function of receiving / transmitting a registration request message / registration acknowledgement message about movement of a mobile host. An explicit multicast packet process portion 903 has a function of analyzing receivers' addresses written in an explicit multicast type packet, and a function for changing the packet. In addition, the explicit multicast packet process portion 903 has a function of transferring an explicit multicast packet when the packet to be transferred is not encapsulated with an IP header addressed to CoA of a mobile host in packet transfer to a packet-undelivered host. A Mobile IP packet transfer portion 904 has a function of encapsulating an explicit multicast type packet with an IP header addressed to CoA of a mobile host and transferring the encapsulated packet to the mobile host.