48 results about "Mobile ip protocol" patented technology

Methods and apparatus for updating accounting information for a mobile node operating according to Mobile IP Protocol are disclosed. A network device which 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.

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 packet sent in a mobile IP communication between different regions passes through a particular address translation unit, so that the communication route cannot be optimized. The packet cannot be delivered to a mobile node not having a fixed home address. To overcome the difficulties, the address translation unit includes a function to process the mobile IPv6 protocol. The mobile node includes a function to dynamically acquire a home address. A first network and a second network each identify the mobile node by a SIP (session initiation protocol) identifier. The mobile node acquires a home address on the second network and registers a corresponding relation between the identifiers and the home address thereof. A terminal on the second network acquires the home address of the mobile node from information of the mobile node registered to the SIP server according to a SIP procedure.

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.

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.

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.

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.

The invention discloses a local internet protocol (IP) access method, which comprises that: a terminal sends an attach request message to a mobility management entity through a base station, and the mobility management entity sends an attach receiving message to the base station and indicates the base station to allocate care-of addresses for users; the base station allocates the care-of addresses for the users and sends the allocated care-of addresses and the attach receiving message to the terminal together; the terminal receives the message sent by the base station, acquires an IP address of a local home agent (L-HA) and initiates and establishes security association with the L-HA; and the terminal informs the L-HA of binding update. The invention also correspondingly discloses a local IP access system. The local IP access is realized by utilizing a mobile IP protocol, and a binding relationship between the care-of addresses of the terminal with a home address is established in the L-HA, namely the users communicate with external through the L-HA, so the service interruption caused by switching under different base stations for the users can be avoided and the user experience is improved.

The invention discloses a method for realizing mobile node identity anonymity during mobile internet protocol (IP) registration, which mainly solves the problems of identity leakage and poor security of mobile nodes during registration in the prior art. The method has the following technical key points: a mobile node identity extension field is added into a registration request message to store atemporary identity identifier of the mobile node so that an attacker cannot wiretap the real identity of the mobile node; the temporary identity identifier of the mobile node, namely H (IDMN / / NHA), is constructed by performing hash operation on the real identity of the mobile node and the random number of a home agent, so that the attacker cannot deduce the real identity of the mobile node according to the wiretapped temporary identity identifier; and due to the randomness of the temporary identity identifier during registration at each time, the attacker cannot track the position movement ofthe mobile node, so the privacy of the mobile node is protected fully. The method can be used for identity anonymity during the roaming authentication of mobile subscribers of the mobile communication system of the next generation.

Methods for transmitting packets using a Mobile IP protocol between a mobile node and a first node in a data network after the mobile node has transmitted data packets to the first node via a first router from a first CoA or CCoA address and by a first security association with the first node. One method includes the mobile node, sending to the first node via a second router using a second CoA or CCoA address, data packets that include an identifier of the mobile node that enables the first node to identify the mobile node as the sender of the data packets during an initial time period after transmission of the data packets via the second router has started, and during the initial time period, the mobile node authenticates the data packets it transmits to the first node using the first security association with the first node.

In an access network which supports a mobile IP protocol, a mobile station may perform several handovers between access nodes during a long session which may cause inefficient mobile IP routing. In the present invention, an access node, which is the target of a handover during an IP session, is arranged to check the preferred mobility agent in respect of the optimal routing on the mobile IP level, and if a more preferred mobility agent is available and not the same as a current mobility agent, the connection to the current mobility agent is closed, and a new connection to the preferred mobility agent of the respective access node is opened. In merit of the new connection established by the access node to the preferred mobility agent, the agent advertisement messages sent by the new mobility agent can be received by the mobile node, and thereby the mobile node is able to detect the change of the attachment point (i.e. mobility agent) and to initiate standard mobile IP registration.

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.

Adding extension field of protocol version number to registered information message of mobile IP, the method makes party of sending message possible to inform party of receiving message that protocol version number is adopted in the party of sending message. According to version number, the party of receiving message determines relevant protocol process mode so as to guarantee compatibility between devices of implementing new / old version according to mobile IP protocol. The invention guarantees that mobile nodes can obtain mobile IP protocol service reliably, and ensures interoperability between devices from different manufacturers. The method does not need to add new entitative device in mobile IP network, and will not increase additional cost of building network for multiple versions in protocol.

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 method, system and device for protecting a network node by an access blocking function, such as a correspondent node firewall, are disclosed. The access blocking function protects either a first or a second network node and allows access to the protected network node from the other network node via a link associated to an address of the first network node and an address of the second network node. The second network node is configured to change its address. The method comprises associating the link associated to the old address of the second network node to the new address of the second network node when the second network node changes its address.

The invention discloses a method for allocating mobile-node network address identifiers MN-NAI. The method comprises the following steps that: a mobility management entity MME sends a protocol indication message to a Serving gateway GW in order to instruct the Serving GW to adopt a specified protocol type; when the specified protocol type is a proxy mobile IP protocol PMIP, the Serving GW constructs and sets an MN-NAI in a Proxy Binding Update message, and sends the Proxy Binding Update message to a packet data network gateway PDN GW so as to establish a PMIP tunnel. The invention simultaneously discloses a device for realizing the method, and service gateway equipment comprising the device. The embodiment of the invention defines the allocation of the MN-NAI. The invention has the advantages of powerfully replenishing the prior communication process and communication proposal and perfecting system functions.

The invention provides a method for accessing a mobile internet protocol (IP) network and an IP bearer network. The mobile IP network is accessed through a router for supporting IP network access and arranged at the edge of the IP bearer network, a new route is built for the accessed mobile IP network, and the new route does not transmit flow of the mobile IP network before a route switching command of an application server is received. After the new route is built, the flow of the mobile IP network is switched into the new route under the scheduling of the application server. The method for accessing the mobile IP network and the IP bearer network build a route in advance in a high speed moving process of the mobile IP network, switching of a fast route and the route is achieved, and the new route can not affect data which is transmitted.

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 invention provides a method for managing traffic streams used in mobile internet. Under the precondition that compatible standard moves IP protocol, mobile nodes are permitted to be out of the home proxy and main home address, at the same time, a plurality of distribution-typed home proxy server DHPs and distribution-typed home address DHoAs exist, and the position management in which the traffic stream is taken as granularity and the transmission route control are realized. MN can select DHP for different traffic streams dynamically, the DHP which provides service for each traffic stream is selected near a communication node of the corresponding opposite end, therefore, end-to-end delay in the communication of the mobile node and the communication node of the opposite end is shortened effectively. MN realizes the switching in which the traffic stream is taken as granularity and transmission route control in the process of movement. The introduction of DHP greatly reduces the dependency on HA by MN, thus not only reducing the congestion in home network and HA load, but also reducing the influence on MA by the possible failure and fault on the home network and HA, at the same time, the network domain in which CN is located can monitor and control the traffic streams conveniently.

The invention discloses a method for constructing a safety system and a safety mechanism for a mobile IP, and the system in the invention is composed of a foreign network consisting of a plurality of mobile nodes, an SSL VPN gateway and an intranet consisting of a home agent and a communication opposite terminal, wherein each mobile node consists of a VPN module and a mobile IP protocol module. The method for constructing the safety mechanism in the invention has the following steps: 1) registering on the home agent when a mobile node roams to other places; 2) responding to the register request of the mobile node by the home agent and performing authentication, encryption and encapsulation on the data grouping by the mobile node; 3) performing authentication and decryption and submitting to the home agent after the SSL VPN gateway receives the data grouping of the mobile node; and 4) removing IP-in-IP encapsulated by the mobile IP protocol by the home agent, submitting to the communication opposite terminal and completing communication. The invention is suitable for environments with low mobile network bandwidth and long time delay, and is convenient in maintenance.

The invention provides an address information setting method such that when home agent information such as an address of a home agent, which is basic information for activating mobile IP protocol processing, is acquired, it is made possible to perform communication that satisfies requirements desired by a user or an application by starting mobile IP protocol processing using home agent information acquired according to an instruction of a user. In addition, it is possible to reduce the work burden on a user for making settings and provide a mobile terminal with high convenience by automatically acquiring home agent information on a link at a time specified by the user.

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.

Systems and methodologies are described that facilitate Mobile IP home agent (HA) discovery in a wireless communication system. Discovery of a HA for Mobile IP can be conducted as described herein for a mobile terminal located on a network wherein movement of the terminal is managed by a network-based mobility protocol. For example, various aspects described herein can be utilized for discovery of a HA located in a 3GPP network from 3GPP and / or non-3GPP access. Further, various aspects described herein can be utilized to discover a gateway acting as mobility anchor for a network mobility protocol utilized by the network. As additionally described herein, HA discovery can be conducted in connection with DNS query formation and communication, network attach and / or re-attach procedures, Neighbor Discovery signaling, and / or other procedures.

Method and system for providing system information in a communication network. According to an embodiment, the present invention provides a method for providing networking routing in compliance with a Mobile IP protocol. The method includes providing a mobile node, which includes a plurality of interfaces. The plurality of interfaces includes a first interface and a second interface. The first interface is associated with a first service, a second service, and a first address. The second interface is associated with a third service and a second address. The method also includes providing a home agent that is configured to store a plurality of entries associated with mobile nodes. The method additionally includes sending a first packet from the mobile node to the home agent. The first packet includes at least a first entry and a second entry.

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.