US20060019708A1 - System and method to allow simple IP mobile nodes to operate seamlessly in a mobile IP network with true roaming capabilities - Google Patents
System and method to allow simple IP mobile nodes to operate seamlessly in a mobile IP network with true roaming capabilities Download PDFInfo
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- US20060019708A1 US20060019708A1 US11/235,589 US23558905A US2006019708A1 US 20060019708 A1 US20060019708 A1 US 20060019708A1 US 23558905 A US23558905 A US 23558905A US 2006019708 A1 US2006019708 A1 US 2006019708A1
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- home agent
- address
- mobile node
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/06—Authentication
- H04W12/062—Pre-authentication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/08—Mobility data transfer
- H04W8/12—Mobility data transfer between location registers or mobility servers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
- H04W8/20—Transfer of user or subscriber data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/04—Network layer protocols, e.g. mobile IP [Internet Protocol]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/005—Data network PoA devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/18—Service support devices; Network management devices
- H04W88/182—Network node acting on behalf of an other network entity, e.g. proxy
Definitions
- This present invention relates to allowing a mobile node, which is transmitting a data message to a destination device, to move between networks.
- Mobile nodes which have become widely used in society today, may take a variety of forms.
- the mobile node may be a cellular phone or personal communication service (PCS) device.
- PCS personal communication service
- a mobile node may be coupled directly or indirectly to a wireless network.
- the wireless network may be directly or indirectly coupled to another device.
- the mobile node may wish to communicate with this other device.
- the mobile node may be also coupled to a user device.
- the user device may be any device that is capable of transmitting and/or receiving any type of information.
- the user device may be a personal digital assistant (PDA) or a personal computer. Other types of user devices are possible.
- PDA personal digital assistant
- Mobile nodes may travel within a “home” network and travel to other (“foreign”) networks. Wherever the mobile node is located, other users and entities may need to send information to the mobile node and the mobile node may desire to send information to these other users and entities.
- the mobile node may be given a permanent address (“home address”) on the home network.
- home address When away from its home network, the current address (“care-of address”) associated with the mobile node may reflect the mobile node's current point of attachment within the foreign network.
- the mobile node may use its home address as the source address of all information, for example, IP datagrams that the mobile node sends or receives from other users or entities.
- the home network may include a home agent.
- the home agent may perform several functions. For example, the home agent may maintain information concerning the mobile node, for instance, the current location of the home device. In another example, when another user or entity desires to communicate with the mobile node, the home agent may act as a router and “tunnel” information to the mobile node (when the mobile node is attached to a foreign network).
- the foreign network may include a foreign agent, which may also perform several functions. For example, when a mobile node moves to the foreign network, the mobile node may contact the foreign agent.
- the foreign agent may be a router on the foreign network and provide routing services to the mobile node while the mobile node is registered on the foreign network.
- the foreign agent may also “detunnel” and deliver information to the mobile node that was tunneled by the mobile node's home agent.
- Home agents and foreign agents may advertise their availability on each network for which they provide service.
- a newly arrived mobile node may send a solicitation on the foreign network to learn if any prospective foreign agents are present.
- the mobile node When the mobile node is away from its home network, it may register its care-of address with its home agent. Depending on its method of attachment, the mobile node may register either directly with its home agent, or through a foreign agent, which forwards the registration to the home agent.
- the mobile node Upon the traversal of a serving area by a mobile node, the mobile node must register with a new foreign agent. Transfer of session from one foreign agent to another may be performed using a proxy server to re-establish the mobile node user's profile information, and the home agent to re-establish the connection profile for the session.
- the system and method of the present invention advantageously allows a mobile node to transmit data to a user device while moving between networks.
- the address of the home agent of the mobile node may be determined by using a proxy server, no matter where the mobile node is located.
- a mobile node is coupled to a proxy server.
- the mobile node may have a home agent and an associated home administration, authorization, and authentication (HAAA) server.
- HAAA home administration, authorization, and authentication
- the proxy server may determine the address of the HAAA.
- the proxy server may contact the HAAA and, responsively, may receive information indicating a methodology to determine the address of the home agent of the mobile node.
- the proxy server may determine the address of the home agent using information received from the HAAA. Information may then be routed from the mobile node to the home agent having the address. Thereafter, if the mobile node moves to a different network, the above procedure may be repeated and connectivity with the home agent will not be lost.
- a mobile node is coupled to a wireless network.
- a PDSN is also coupled to the wireless network and a proxy server is coupled to the PDSN.
- a HAAA server is coupled to the proxy server and a home agent is coupled to the PDSN.
- the mobile node may send a request message to the wireless network, and the wireless network may send the request message to the PDSN.
- the PDSN may forward the request message to the proxy server.
- the proxy server may have a table and PDSN may determine the address of the HAAA from the table.
- the HAAA may be contacted and may send information representative of an IP address assignment to the proxy server.
- the proxy server may determine the address of the home agent based upon the information. The message may thereafter be routed to the home agent having the address.
- the proxy server may determine that the mobile node has ‘roamed’, or traversed to a new packet data serving node or foreign agent, and may explicitly reclaim any resources (perform “resource allocation”) affiliated with the original session on the original foreign agent.
- the mechanism of resource management may be performed in conjunction with reclaiming resources allocated to the original session on the home agent.
- Reclaiming of resources from the original foreign agent by the proxy server may be performed using resource-management messages following the RADIUS protocol for communication. Management of resources on the home agent by the foreign agent may be triggered by the completion of the resource reclamation procedure between the proxy server and the foreign agent, and may follow the mobile IP de-registration procedures.
- FIG. 1 is a diagram illustrating a preferred embodiment of the system for transmitting data to a home agent in accordance with the present invention
- FIG. 2 is one example of a table used by the proxy server in accordance with a preferred embodiment of the present invention.
- FIG. 3 is a call-flow diagram illustrating setting up a connection in accordance with a preferred embodiment of the present invention
- FIG. 4 is a call-flow diagram illustrating tearing down a connection in accordance with a preferred embodiment of the present invention
- FIG. 5 is a flow chart of the operation of the proxy server in accordance with a preferred embodiment of the present invention.
- FIG. 6 is a call-flow diagram illustrating resource allocation in accordance with a preferred embodiment of the present invention.
- a system includes a mobile node 102 , a first network 104 , a second network 109 , a first packet data serving node (PDSN) 106 , a second PDSN 112 , a proxy server 108 , a home agent 114 , a first home administration, authorization, and authentication (HAAA) server 116 , a second HAAA server 118 , and a destination device 120 .
- a database 107 may be coupled to the proxy server 108 .
- the mobile node 102 may be coupled to the network 104 via a connection 103 or to the network 109 via the connection 110 .
- the network 104 may be coupled to the PDSN 106 via a connection 105 and the network 109 may be coupled to the PDSN 112 via a connection 111 .
- the PDSN 106 and the PDSN 112 may be coupled to the proxy server 108 and the home agent 114 .
- the proxy server 108 is coupled to the HAAA 116 and the HAAA 118 .
- the home agent 114 is coupled to the destination device 120 .
- the mobile node 102 is any type of mobile wireless device.
- the mobile node may be a cellular telephone, a PCS device, or a personal digital assistant (PDA).
- PDA personal digital assistant
- other types of mobile nodes are possible.
- the networks 104 and 109 may be an IS-95/CDMA or CDM2000 wireless network.
- the network may be a wireless cellular communication network.
- the networks 104 and 109 may also include a variety of devices such as base stations, MSCs, and switches. Of course, the networks 104 and 109 may include other devices, as well.
- the first PDSN 106 and the second PDSN 112 may aggregate traffic from the networks 104 and 109 and provide a path for this traffic to a data network.
- the PDSN 106 and PDSN 109 may be CommWorks Corporation Packet Data Serving Node. Of course, other examples of PDSNs are possible.
- the functions of the proxy server 108 may be implemented by a processor using computer instructions stored in a memory.
- the proxy server 108 may determine the address of the home agent 114 so that as the mobile node 102 moves between networks 104 and 109 , connectivity between the mobile node 102 and the destination device 120 .
- the home agent 114 may be any server that has home agent capabilities.
- the home agent 114 is a home agent manufactured by CommWorks Corporation.
- the home agent 114 tunnels information from the mobile node 102 to the destination device 120 .
- the first HAAA server 116 and the second HAAA server 118 may be any type of HAAA server.
- the first HAAA server 116 and the second HAAA server 118 may be a Funk Software Steel Belted RADIUS server.
- the mobile node 102 having a domain address may establish a session with the network 104 and the PDSN 106 .
- LPC negotiations may be performed to establish the session.
- the PDSN 106 may send an access-request message, for example, a CHAP access-request message to the proxy server 108 .
- the proxy server 108 may determine a HAAA server 116 or 118 based upon the domain address. For example, as described elsewhere in this specification, the proxy server may use a table to find the address of the HAAA relating to the domain address.
- the proxy server 108 may send the access-request message to the HAAA 116 .
- the HAAA 116 may return an access-accept message to the proxy server.
- the access-accept message may include an indication of the methodology to be used to determine the home address of the mobile node 102 .
- the indication of methodology may indicate that the proxy should use a static address for the home address as assigned by the HAAA or consult a local address pool (“dynamic addressing”) to determine the home address of the mobile node.
- a static address e.g., 10.10.10.1010
- a fixed address e.g. 10.10.10.10
- This value is provided in the IP address attribute of an access-accept message.
- the absence of the IP Address attribute, or the existence of a predetermined IP address (e.g. 255.255.255.254) may be used to instruct the proxy to use an address pool to find the address of the home agent.
- the proxy may assign a home agent address.
- the value may be provided in the Next-Hop-Gateway attribute of the access-accept message.
- the value may be indicated by the HAAA.
- the absence of the attribute indicates to the proxy that it should select a home agent address for the request based on request parameters (for e.g. the domain name).
- request parameters for e.g. the domain name.
- the proxy server 108 may receive the message and from the indication of methodology determine the address of the home agent 114 . This address may be passed to the PDSN 106 . The PDSN 106 then may route all messages from the mobile node 102 through the home agent 114 to the destination device 120 .
- a teardown procedure may be performed. Thereafter, the same procedure as described above may be used to establish a connection to a home agent 114 , this time via the PDSN 112 .
- a table 200 has a realm entry 202 .
- the realm entry is ABC.com.
- the table also has a home agent entry 204 .
- the entry indicates the address of the home agent, HA1.
- HA1 may itself be a pointer to the actual address, for example, “10.1.1.1.”
- the table 200 also has a pool entry 206 , which is “POOL1.”
- POOL1 points to an address pool 214 , which includes a plurality of home agent addresses.
- the table also includes a preferred HAAA entry 208 and a secondary HAAA entry 210 , which have addresses of 20.1.1.1 and 20.1.1.10, respectively.
- the table 200 also includes a network type field 216 , which is set to “Mobile IP”. The field could also have values of “Simple IP”, or “Mobile Proxy Agent”. Of course, there may be other fields in the table and additional entries for different realms.
- FIG. 3 one example of a session set-up procedure is described. This example describes communications between a mobile node, network, PDSN, proxy server, home agent (HA) and HAAA coupled together as illustrated in FIG. 1 .
- HA home agent
- an access-request message for example an access-request message conforming to the CHAP protocol, is sent from the PDSN to the proxy server.
- the proxy server determines that there is no existing session (from information in its database), selects a HAAA server, and sends the access-request message to the HAAA server.
- the HAAA server sends a access-accept message to the proxy server.
- the message may contain information indicative of the methodology that the proxy server may use to determine the home address of the mobile node.
- the message may include, the framed IP address, framed compression type, and frame protocol.
- the proxy server selects an address of the home agent (based upon the information indicative of methodology) and creates a session.
- a session is defined by a record inserted into a database (either local or network accessible) which stores the user's connection information.
- the proxy server sends an access-accept message, for example, including the IP address of the home agent, to the PDSN.
- the PDSN sends a request to set up a link to the home agent.
- the request for example, may be in the form of a registration request (RRQ) message according to the Mobile IP protocol as defined in RCF2002.
- the message may include the address of the home agent and other information.
- the home agent sends a response to the request (at step 310 ) indicating that the link can be set-up.
- the response for example, may be in the for of a registration response (RRP) message according to the Mobile IP protocol.
- the response message is an acknowledgement of receipt of the request.
- a configuration request message is sent from the mobile node to the PDSN.
- the configuration request message may be in the form of a IPCPConfigRequest message according to the IPCP protocol defined in RFC1332.
- the purpose of the configuration request message is to open a connection for communication between the mobile node and the PDSN.
- a configuration request message is sent from PDSN to the mobile node.
- the configuration request message may be in the form of an IPCConfigRequest message according to the IPCP protocol.
- the purpose of this configuration request message is to open a IP connection for communication between the PDSN and the mobile node.
- the PDSN sends a configuration acknowledgment in response to the configuration request message sent at step 314 .
- the configuration acknowledgement message may be a IPCPConfigack message according to the IPCP protocol and include the IP address assigned to the user.
- the purpose of the configuration acknowledgement message is to provide an indication of receipt and acceptance of the connection request from the mobile node.
- the mobile node sends a configuration acknowledgment in response to the configuration request message sent at step 316 .
- the configuration acknowledgement message may be an IPCPConfigack message according to the IPCP protocol.
- the purpose of the configuration acknowledgement message is to indicate acceptance of the connection request from the PDSN.
- the PDSN sends an accounting request message to the proxy server.
- the purpose of the message is initial transmission of billing information.
- the accounting message may be a start message according to the RADIUS protocol.
- the proxy server forwards the accounting request message to the HAAA server.
- the accounting message may be a start message according to the RADIUS protocol.
- the HAAA sends an accounting response message to the proxy server.
- the purpose of the response message is acknowledgement of receipt of the accounting request message.
- the accounting response message is sent according to the RADIUS protocol.
- the proxy server forwards the accounting response message to the PDSN.
- the purpose of the response message is acknowledgment of receipt of the accounting request message.
- the accounting response message is sent according to the RADIUS protocol.
- This example describes communications between a network, PDSN, proxy server, home agent (HA) and HAAA coupled together as illustrated in FIG. 1 .
- the network sends the PDSN a RRQ-lifetime message, which requests that the connection between the mobile and the home agent be torn down.
- the PDSN responds by sending a RRQ-Accept message to the network, which informs the network that the request to tear down the connection has been accepted.
- the PDSN sends an accounting request message to the proxy server.
- the purpose of the message is to indicate termination of the billing session.
- the accounting message may be a stop message according to the RADIUS protocol.
- the proxy server forwards the accounting request message to the HAAA server.
- the purpose of the message is to notify the HAAA of the accounting session termination.
- the accounting message may be a stop message according to the RADIUS protocol.
- the HAAA sends an accounting response message to the proxy server.
- the purpose of the response message is acknowledgement of receipt of the accounting request message.
- the accounting response message is sent according to the RADIUS protocol.
- the proxy server forwards the accounting response message to the PDSN.
- the purpose of the response message is acknowledgement of the accounting request message.
- the accounting response message is sent according to the RADIUS protocol.
- the PDSN sends a Resource Free Request message to the Proxy server.
- the purpose of the message is clean up and removal of active session information from the proxy's session database.
- the message is formatted according to the RADIUS protocol.
- the proxy server responds with a Resource Free Response message that is sent to the PDSN.
- This response message is formatted according to the RADIUS protocol.
- the PDSN sends a deRRQ-Lifetime message to the home agent.
- the message may be according to the Mobile IP protocol.
- the purpose of this message is removal of any active session information on the home agent.
- the home agent responds with a deRRP Accept message that it sends to the PDSN.
- the message may be according to the Mobile IP protocol.
- the purpose of this message is acknowledgement of the request message. At this point, the session has been torn down.
- a mobile node moves from a first PDSN (“PDSN_src”) to a second PDSN (“PDSN_tgt”).
- the MN has a home agent, a home radius server, and a proxy server associated with it.
- the mobile node has an active connection established with the PDSN_src, as has been described elsewhere in this specification.
- the mobile node has traversed from the packet data serving area covered by the PDSN_src to the area covered by the PDSN_tgt.
- the mobile node may attempt to establish a new connection with the PDSN_tgt, by initiating LCP negotiations and authentication procedures.
- the PDSN_tgt may send an access-request message for authentication to the proxy server.
- the proxy server may communicate the authentication request to the home AAA server at step 603 a and receive an access-accept message at step 603 b.
- the proxy server may accept the request for authentication by the PDSN_tgt by sending an access-accept message to the PDSN_tgt.
- the proxy server may be triggered (by the request for authentication from the traversing mobile node) to reclaim the resources that remain from the original session on the PDSN_src, prior to traversal.
- the request for resource-reclaim may be acknowledged by the PDSN_src in step 606 with a resource-free-request.
- the proxy server may respond to the request with a resource-free-response in step 607 .
- Messages for steps 603 , 604 , 605 , 606 , 607 , and 608 may be formatted according to the RADIUS protocol.
- the PDSN_src may delete all information about the session from its Visitor List databases.
- the message may be according to the Mobile IP protocol. The purpose of this message is removal of any active session information on the home agent.
- the home agent may respond with a de-registration response (de-RRP) message that it may send to the PDSN_src.
- the message may be according to the Mobile IP protocol.
- the purpose of this message is acknowledgement of the request message.
- the PDSN_tgt may send a RRQ message in order to establish a registration with the home agent.
- the RRQ may have a non-zero or infinite lifetime.
- the home agent may respond with a RRP message, indicating acknowledgement of the request.
- a CHAP accept message may be sent from the PDSN_tgt to the mobile node.
- the purpose of this message is to indicate to the mobile node that authentication was completed successfully.
- IPCP negotiations take place between the mobile node and the PDSN_tgt. The purpose of these negotiations is to establish an IP communication connection between the mobile node and the PDSN. At this point, the session has been torn down on the PDSN_src, and the session has been actively transferred to the PDSN_tgt.
- the proxy server receives the message from an outside entity (e.g., the PDSN or the HAAA) and determines the type of message.
- an outside entity e.g., the PDSN or the HAAA
- the proxy server determines the address of the HAAA using a table stored at the proxy server. For example, assuming that the message includes a domain name of “ABC.com”, the proxy server may look at a table of FIG. 2 and determine that, as a first choice, the HAAA has an address is 20.1.1.1.
- the access-request message is passed to the HAAA with the address of 20.1.1.1. Execution then ends.
- the proxy server determines the home address of the mobile node. In order to determine the address, the proxy server examines the access-accept message.
- the access-accept message includes a field, which indicates the methodology the proxy server may use to determine the home address of the mobile node. For example, if the field IP Address exists and contains an IP address assigned by the HAAA, the proxy server may use the address proposed. In another example, the field may not exist, or may have a magic IP address value (e.g. 255.255.255.254). This indicates to the proxy server to find an address from a pool. The proxy server may consult its table and find the pool, then find an address from the pool.
- the proxy server may also assign a home agent address for the mobile node.
- the home agent address may be determined from the domain name (ABC.com).
- the home agent address then may be sent in the Next-Hop-Gateway field of the access-accept message.
- the proxy server forwards the access-accept message and address to the PDSN. Execution then ends.
- the proxy server may perform no processing except to generate a message to be forwarded, and the proxy server passes the message to another entity. Execution then ends.
- the proxy server message keep the proxy server then may forward the message intact o another entity. Execution then ends.
- a computer usable medium can include a readable memory device, such as, a hard drive device, a CD-ROM, a DVD-ROM, or a computer diskette, having computer readable program code segments stored thereon.
- the computer readable medium can also include a communications or transmission medium, such as, a bus or a communications link, either optical, wired, or wireless having program code segments carried thereon as digital or analog data signals.
Abstract
A system and method of transmitting information between a mobile node and a home agent of the mobile node. The mobile node has an associated home AAA server. The address of the HAAA is determined. The HAAA is contacted and, responsively, receives information indicating a methodology of determining the home address of the mobile node. A proxy server determines the address of the home agent using information received from the PDSN. The information is routed from the mobile node to the home agent having the address.
Description
- This present invention relates to allowing a mobile node, which is transmitting a data message to a destination device, to move between networks.
- Mobile nodes, which have become widely used in society today, may take a variety of forms. For example, the mobile node may be a cellular phone or personal communication service (PCS) device.
- A mobile node may be coupled directly or indirectly to a wireless network. In turn, the wireless network may be directly or indirectly coupled to another device. The mobile node may wish to communicate with this other device.
- The mobile node may be also coupled to a user device. The user device may be any device that is capable of transmitting and/or receiving any type of information. For instance, the user device may be a personal digital assistant (PDA) or a personal computer. Other types of user devices are possible.
- Mobile nodes may travel within a “home” network and travel to other (“foreign”) networks. Wherever the mobile node is located, other users and entities may need to send information to the mobile node and the mobile node may desire to send information to these other users and entities.
- In order to determine the location of the mobile node (and transfer the information), the mobile node may be given a permanent address (“home address”) on the home network. When away from its home network, the current address (“care-of address”) associated with the mobile node may reflect the mobile node's current point of attachment within the foreign network. The mobile node may use its home address as the source address of all information, for example, IP datagrams that the mobile node sends or receives from other users or entities.
- To facilitate the transfer of information between the mobile node and other users and entities, the home network may include a home agent. The home agent may perform several functions. For example, the home agent may maintain information concerning the mobile node, for instance, the current location of the home device. In another example, when another user or entity desires to communicate with the mobile node, the home agent may act as a router and “tunnel” information to the mobile node (when the mobile node is attached to a foreign network).
- The foreign network may include a foreign agent, which may also perform several functions. For example, when a mobile node moves to the foreign network, the mobile node may contact the foreign agent. In one illustrative example, the foreign agent may be a router on the foreign network and provide routing services to the mobile node while the mobile node is registered on the foreign network. The foreign agent may also “detunnel” and deliver information to the mobile node that was tunneled by the mobile node's home agent.
- Home agents and foreign agents may advertise their availability on each network for which they provide service. A newly arrived mobile node may send a solicitation on the foreign network to learn if any prospective foreign agents are present. When the mobile node is away from its home network, it may register its care-of address with its home agent. Depending on its method of attachment, the mobile node may register either directly with its home agent, or through a foreign agent, which forwards the registration to the home agent.
- Upon the traversal of a serving area by a mobile node, the mobile node must register with a new foreign agent. Transfer of session from one foreign agent to another may be performed using a proxy server to re-establish the mobile node user's profile information, and the home agent to re-establish the connection profile for the session.
- The system and method of the present invention advantageously allows a mobile node to transmit data to a user device while moving between networks. Conveniently, the address of the home agent of the mobile node may be determined by using a proxy server, no matter where the mobile node is located.
- In one embodiment of the present invention, a mobile node is coupled to a proxy server. The mobile node may have a home agent and an associated home administration, authorization, and authentication (HAAA) server.
- The proxy server may determine the address of the HAAA. The proxy server may contact the HAAA and, responsively, may receive information indicating a methodology to determine the address of the home agent of the mobile node. The proxy server may determine the address of the home agent using information received from the HAAA. Information may then be routed from the mobile node to the home agent having the address. Thereafter, if the mobile node moves to a different network, the above procedure may be repeated and connectivity with the home agent will not be lost.
- In another embodiment of the present invention, a mobile node is coupled to a wireless network. A PDSN is also coupled to the wireless network and a proxy server is coupled to the PDSN. A HAAA server is coupled to the proxy server and a home agent is coupled to the PDSN.
- The mobile node may send a request message to the wireless network, and the wireless network may send the request message to the PDSN. The PDSN may forward the request message to the proxy server. The proxy server may have a table and PDSN may determine the address of the HAAA from the table. The HAAA may be contacted and may send information representative of an IP address assignment to the proxy server. The proxy server may determine the address of the home agent based upon the information. The message may thereafter be routed to the home agent having the address.
- In another embodiment of the invention, upon the traversal of the mobile node between packet data serving areas, the proxy server may determine that the mobile node has ‘roamed’, or traversed to a new packet data serving node or foreign agent, and may explicitly reclaim any resources (perform “resource allocation”) affiliated with the original session on the original foreign agent. The mechanism of resource management may be performed in conjunction with reclaiming resources allocated to the original session on the home agent. Reclaiming of resources from the original foreign agent by the proxy server may be performed using resource-management messages following the RADIUS protocol for communication. Management of resources on the home agent by the foreign agent may be triggered by the completion of the resource reclamation procedure between the proxy server and the foreign agent, and may follow the mobile IP de-registration procedures.
- These as well as other features and advantages of the present invention will become apparent to those of ordinary skill in the art by reading the following detailed description, with appropriate reference to the accompanying drawings.
- Preferred embodiments of the present inventions are described with reference to the following drawings, wherein:
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FIG. 1 is a diagram illustrating a preferred embodiment of the system for transmitting data to a home agent in accordance with the present invention; -
FIG. 2 is one example of a table used by the proxy server in accordance with a preferred embodiment of the present invention; -
FIG. 3 is a call-flow diagram illustrating setting up a connection in accordance with a preferred embodiment of the present invention; -
FIG. 4 is a call-flow diagram illustrating tearing down a connection in accordance with a preferred embodiment of the present invention; -
FIG. 5 is a flow chart of the operation of the proxy server in accordance with a preferred embodiment of the present invention; and -
FIG. 6 is a call-flow diagram illustrating resource allocation in accordance with a preferred embodiment of the present invention. - Referring to
FIG. 1 , a system includes amobile node 102, afirst network 104, asecond network 109, a first packet data serving node (PDSN) 106, asecond PDSN 112, aproxy server 108, ahome agent 114, a first home administration, authorization, and authentication (HAAA)server 116, asecond HAAA server 118, and adestination device 120. Adatabase 107 may be coupled to theproxy server 108. - The
mobile node 102 may be coupled to thenetwork 104 via aconnection 103 or to thenetwork 109 via theconnection 110. Thenetwork 104 may be coupled to thePDSN 106 via aconnection 105 and thenetwork 109 may be coupled to thePDSN 112 via aconnection 111. ThePDSN 106 and thePDSN 112 may be coupled to theproxy server 108 and thehome agent 114. Theproxy server 108 is coupled to theHAAA 116 and theHAAA 118. Thehome agent 114 is coupled to thedestination device 120. - The
mobile node 102 is any type of mobile wireless device. For example, the mobile node may be a cellular telephone, a PCS device, or a personal digital assistant (PDA). Of course, other types of mobile nodes are possible. - The
networks networks networks - The
first PDSN 106 and thesecond PDSN 112 may aggregate traffic from thenetworks PDSN 106 andPDSN 109 may be CommWorks Corporation Packet Data Serving Node. Of course, other examples of PDSNs are possible. - The functions of the
proxy server 108 may be implemented by a processor using computer instructions stored in a memory. Theproxy server 108 may determine the address of thehome agent 114 so that as themobile node 102 moves betweennetworks mobile node 102 and thedestination device 120. - The
home agent 114 may be any server that has home agent capabilities. In one example, thehome agent 114 is a home agent manufactured by CommWorks Corporation. Thehome agent 114 tunnels information from themobile node 102 to thedestination device 120. - The
first HAAA server 116 and thesecond HAAA server 118 may be any type of HAAA server. In one example, thefirst HAAA server 116 and thesecond HAAA server 118 may be a Funk Software Steel Belted RADIUS server. - In one example of the operation of the network of
FIG. 1 , themobile node 102 having a domain address (e.g., ABC.com) may establish a session with thenetwork 104 and thePDSN 106. For example, LPC negotiations may be performed to establish the session. - The
PDSN 106 may send an access-request message, for example, a CHAP access-request message to theproxy server 108. Theproxy server 108 may determine aHAAA server proxy server 108 may send the access-request message to theHAAA 116. - The
HAAA 116 may return an access-accept message to the proxy server. The access-accept message may include an indication of the methodology to be used to determine the home address of themobile node 102. For example, the indication of methodology may indicate that the proxy should use a static address for the home address as assigned by the HAAA or consult a local address pool (“dynamic addressing”) to determine the home address of the mobile node. In the case of a static address, a fixed address (e.g., 10.10.10.10) may be used to indicate that the home address of the mobile node is fixed, and provided by the HAAA. This value is provided in the IP address attribute of an access-accept message. In the case of dynamic addressing, the absence of the IP Address attribute, or the existence of a predetermined IP address (e.g. 255.255.255.254) may be used to instruct the proxy to use an address pool to find the address of the home agent. - In addition to the home address for the mobile node, the proxy may assign a home agent address. The value may be provided in the Next-Hop-Gateway attribute of the access-accept message. The value may be indicated by the HAAA. The absence of the attribute indicates to the proxy that it should select a home agent address for the request based on request parameters (for e.g. the domain name). Of course other indications of methodology and other methodologies are possible.
- The
proxy server 108 may receive the message and from the indication of methodology determine the address of thehome agent 114. This address may be passed to thePDSN 106. ThePDSN 106 then may route all messages from themobile node 102 through thehome agent 114 to thedestination device 120. - If the
mobile node 102 moves to the network 109 (via connection 110), a teardown procedure may be performed. Thereafter, the same procedure as described above may be used to establish a connection to ahome agent 114, this time via thePDSN 112. - Referring now to
FIG. 2 , one example of a table used by a proxy server is described. A table 200, has arealm entry 202. In this case, the realm entry is ABC.com. The table also has ahome agent entry 204. In this case, the entry indicates the address of the home agent, HA1. HA1 may itself be a pointer to the actual address, for example, “10.1.1.1.” - The table 200 also has a
pool entry 206, which is “POOL1.” POOL1 points to anaddress pool 214, which includes a plurality of home agent addresses. The table also includes apreferred HAAA entry 208 and asecondary HAAA entry 210, which have addresses of 20.1.1.1 and 20.1.1.10, respectively. The table 200 also includes anetwork type field 216, which is set to “Mobile IP”. The field could also have values of “Simple IP”, or “Mobile Proxy Agent”. Of course, there may be other fields in the table and additional entries for different realms. - Referring now to
FIG. 3 , one example of a session set-up procedure is described. This example describes communications between a mobile node, network, PDSN, proxy server, home agent (HA) and HAAA coupled together as illustrated inFIG. 1 . - At
step 302, an access-request message, for example an access-request message conforming to the CHAP protocol, is sent from the PDSN to the proxy server. Atstep 304, the proxy server determines that there is no existing session (from information in its database), selects a HAAA server, and sends the access-request message to the HAAA server. - At
step 306, the HAAA server sends a access-accept message to the proxy server. For example, the message may contain information indicative of the methodology that the proxy server may use to determine the home address of the mobile node. In addition, the message may include, the framed IP address, framed compression type, and frame protocol. - At
step 308, the proxy server selects an address of the home agent (based upon the information indicative of methodology) and creates a session. A session is defined by a record inserted into a database (either local or network accessible) which stores the user's connection information. The proxy server sends an access-accept message, for example, including the IP address of the home agent, to the PDSN. - At
step 310, the PDSN sends a request to set up a link to the home agent. The request, for example, may be in the form of a registration request (RRQ) message according to the Mobile IP protocol as defined in RCF2002. The message may include the address of the home agent and other information. - At
step 312, the home agent sends a response to the request (at step 310) indicating that the link can be set-up. The response, for example, may be in the for of a registration response (RRP) message according to the Mobile IP protocol. The response message is an acknowledgement of receipt of the request. - At step 314 a configuration request message is sent from the mobile node to the PDSN. In one example, the configuration request message may be in the form of a IPCPConfigRequest message according to the IPCP protocol defined in RFC1332. The purpose of the configuration request message is to open a connection for communication between the mobile node and the PDSN.
- At step 316 a configuration request message is sent from PDSN to the mobile node. In one example, the configuration request message may be in the form of an IPCConfigRequest message according to the IPCP protocol. The purpose of this configuration request message is to open a IP connection for communication between the PDSN and the mobile node.
- At
step 318, the PDSN sends a configuration acknowledgment in response to the configuration request message sent atstep 314. For example, the configuration acknowledgement message may be a IPCPConfigack message according to the IPCP protocol and include the IP address assigned to the user. The purpose of the configuration acknowledgement message is to provide an indication of receipt and acceptance of the connection request from the mobile node. - At
step 320, the mobile node sends a configuration acknowledgment in response to the configuration request message sent atstep 316. For example, the configuration acknowledgement message may be an IPCPConfigack message according to the IPCP protocol. The purpose of the configuration acknowledgement message is to indicate acceptance of the connection request from the PDSN. - At
step 322, the PDSN sends an accounting request message to the proxy server. The purpose of the message is initial transmission of billing information. The accounting message may be a start message according to the RADIUS protocol. - At
step 324, the proxy server forwards the accounting request message to the HAAA server. The accounting message may be a start message according to the RADIUS protocol. - At
step 326, the HAAA sends an accounting response message to the proxy server. The purpose of the response message is acknowledgement of receipt of the accounting request message. The accounting response message is sent according to the RADIUS protocol. - At
step 328, the proxy server forwards the accounting response message to the PDSN. The purpose of the response message is acknowledgment of receipt of the accounting request message. The accounting response message is sent according to the RADIUS protocol. - Referring now to
FIG. 4 , a teardown procedure is described. This example describes communications between a network, PDSN, proxy server, home agent (HA) and HAAA coupled together as illustrated inFIG. 1 . - At
step 400, the network sends the PDSN a RRQ-lifetime message, which requests that the connection between the mobile and the home agent be torn down. Atstep 402, the PDSN responds by sending a RRQ-Accept message to the network, which informs the network that the request to tear down the connection has been accepted. - At
step 404, the PDSN sends an accounting request message to the proxy server. The purpose of the message is to indicate termination of the billing session. The accounting message may be a stop message according to the RADIUS protocol. - At
step 406, the proxy server forwards the accounting request message to the HAAA server. The purpose of the message is to notify the HAAA of the accounting session termination. The accounting message may be a stop message according to the RADIUS protocol. - At
step 408, the HAAA sends an accounting response message to the proxy server. The purpose of the response message is acknowledgement of receipt of the accounting request message. The accounting response message is sent according to the RADIUS protocol. - At
step 410, the proxy server forwards the accounting response message to the PDSN. The purpose of the response message is acknowledgement of the accounting request message. The accounting response message is sent according to the RADIUS protocol. - At
step 412, the PDSN sends a Resource Free Request message to the Proxy server. The purpose of the message is clean up and removal of active session information from the proxy's session database. The message is formatted according to the RADIUS protocol. - At
step 414, the proxy server responds with a Resource Free Response message that is sent to the PDSN. This response message is formatted according to the RADIUS protocol. - At
step 416, the PDSN sends a deRRQ-Lifetime message to the home agent. The message may be according to the Mobile IP protocol. The purpose of this message is removal of any active session information on the home agent. - At
step 418, the home agent responds with a deRRP Accept message that it sends to the PDSN. The message may be according to the Mobile IP protocol. The purpose of this message is acknowledgement of the request message. At this point, the session has been torn down. - Referring now to
FIG. 6 , one example of a transfer of session from one foreign agent to another due to traversal of a packet data serving area is described. InFIG. 6 , a mobile node (“MN”) moves from a first PDSN (“PDSN_src”) to a second PDSN (“PDSN_tgt”). The MN has a home agent, a home radius server, and a proxy server associated with it. - At
step 600, the mobile node has an active connection established with the PDSN_src, as has been described elsewhere in this specification. - At
step 601 the mobile node has traversed from the packet data serving area covered by the PDSN_src to the area covered by the PDSN_tgt. Atstep 602, the mobile node may attempt to establish a new connection with the PDSN_tgt, by initiating LCP negotiations and authentication procedures. Atstep 603, the PDSN_tgt may send an access-request message for authentication to the proxy server. The proxy server may communicate the authentication request to the home AAA server atstep 603 a and receive an access-accept message atstep 603 b. - At
step 604, the proxy server may accept the request for authentication by the PDSN_tgt by sending an access-accept message to the PDSN_tgt. - At
step 605, the proxy server may be triggered (by the request for authentication from the traversing mobile node) to reclaim the resources that remain from the original session on the PDSN_src, prior to traversal. The request for resource-reclaim may be acknowledged by the PDSN_src instep 606 with a resource-free-request. The proxy server may respond to the request with a resource-free-response instep 607. Messages forsteps - At
step 608, the PDSN_src may delete all information about the session from its Visitor List databases. Atstep 609, the PDSN_src may send a de-registration request (de-RRQ) for example, with lifetime=0, to the home agent. The message may be according to the Mobile IP protocol. The purpose of this message is removal of any active session information on the home agent. - At
step 610, the home agent may respond with a de-registration response (de-RRP) message that it may send to the PDSN_src. The message may be according to the Mobile IP protocol. The purpose of this message is acknowledgement of the request message. - At
step 611, the PDSN_tgt may send a RRQ message in order to establish a registration with the home agent. The RRQ may have a non-zero or infinite lifetime. Atstep 612, the home agent may respond with a RRP message, indicating acknowledgement of the request. - At
step 613, a CHAP accept message may be sent from the PDSN_tgt to the mobile node. The purpose of this message is to indicate to the mobile node that authentication was completed successfully. Atstep 614, IPCP negotiations take place between the mobile node and the PDSN_tgt. The purpose of these negotiations is to establish an IP communication connection between the mobile node and the PDSN. At this point, the session has been torn down on the PDSN_src, and the session has been actively transferred to the PDSN_tgt. - Referring now to
FIGS. 2 and 5 , one example of the operation of a proxy server is described. Atstep 502, the proxy server receives the message from an outside entity (e.g., the PDSN or the HAAA) and determines the type of message. - If the type of message is an access-request, then at
step 504, the proxy server determines the address of the HAAA using a table stored at the proxy server. For example, assuming that the message includes a domain name of “ABC.com”, the proxy server may look at a table ofFIG. 2 and determine that, as a first choice, the HAAA has an address is 20.1.1.1. Atstep 506, the access-request message is passed to the HAAA with the address of 20.1.1.1. Execution then ends. - If the type of message is an access-accept, then at
step 508, the proxy server determines the home address of the mobile node. In order to determine the address, the proxy server examines the access-accept message. In one example, the access-accept message includes a field, which indicates the methodology the proxy server may use to determine the home address of the mobile node. For example, if the field IP Address exists and contains an IP address assigned by the HAAA, the proxy server may use the address proposed. In another example, the field may not exist, or may have a magic IP address value (e.g. 255.255.255.254). This indicates to the proxy server to find an address from a pool. The proxy server may consult its table and find the pool, then find an address from the pool. The proxy server may also assign a home agent address for the mobile node. The home agent address may be determined from the domain name (ABC.com). The home agent address then may be sent in the Next-Hop-Gateway field of the access-accept message. Of course, other methodologies may be indicated and other methods of determining the address are possible. Atstep 510, the proxy server forwards the access-accept message and address to the PDSN. Execution then ends. - If the type of message is an accounting request, then at
step 512, the proxy server may perform no processing except to generate a message to be forwarded, and the proxy server passes the message to another entity. Execution then ends. - If the type of message is an accounting response, then at
step 516, the proxy server message keep the proxy server then may forward the message intact o another entity. Execution then ends. - It should be understood that the programs, processes, methods and systems described herein are not related or limited to any particular type of computer or network system (hardware or software), unless indicated otherwise. Various types of general purpose or specialized computer systems may be used with or perform operations in accordance with the teachings described herein.
- In view of the wide variety of embodiments to which the principles of the present invention can be applied, it should be understood that the illustrated embodiments are exemplary only, and should not be taken as limiting the scope of the present invention. For example, the steps of the flow diagrams may be taken in sequences other than those described, and more or fewer elements may be used in the block diagrams. While various elements of the preferred embodiments have been described as being implemented in software, in other embodiments in hardware or firmware implementations may alternatively be used, and vice-versa.
- It will be apparent to those of ordinary skill in the art that methods involved in the system and method for determining the address of a home agent may be embodied in a computer program product that includes a computer usable medium. For example, such a computer usable medium can include a readable memory device, such as, a hard drive device, a CD-ROM, a DVD-ROM, or a computer diskette, having computer readable program code segments stored thereon. The computer readable medium can also include a communications or transmission medium, such as, a bus or a communications link, either optical, wired, or wireless having program code segments carried thereon as digital or analog data signals.
- The claims should not be read as limited to the described order or elements unless stated to that effect. Therefore, all embodiments that come within the scope and spirit of the following claims and equivalents thereto are claimed as the invention.
Claims (20)
1. A method of transmitting information between a mobile node and a home agent of the mobile node, the mobile node having an associated home AAA server, the method comprising:
determining the address of the HAAA;
contacting the HAAA and, responsively, receiving information indicating a methodology of determining the address of the home agent of the mobile node;
determining the address of the home agent using information received from the HAAA and the PDSN; and
routing the information from the mobile node to the home agent having the address.
2. The method of claim 1 further comprising:
moving the mobile node to a second network;
re-determining the address of the HAAA;
re-contacting the HAAA and, responsively, receiving information indicating a methodology to determine the address of the home agent of the mobile node;
re-determining the address of the home agent; and
re-routing information to the home agent having the address.
3. The method of claim 1 wherein the message involves using a static address.
4. The method of claim 1 wherein the methodology involves obtaining an address from an address pool.
5. A system comprising:
a mobile node;
a wireless network coupled to the mobile node;
a PDSN coupled to the wireless network;
a proxy server coupled to the PDSN, the proxy server including a table, the table including information indicating the home address of the mobile node;
a HAAA coupled to the proxy server;
a home agent coupled to the PDSN;
wherein the mobile node sends a access-request message to the wireless network, and the wireless network sends the access-request message to the PDSN;
wherein the PDSN forwards the access-request to the proxy server;
wherein the proxy server determines the address of the HAAA;
wherein the HAAA receives the access-request message and, responsively, sends information representative of an IP address assignment to the proxy server, and the proxy server determines the address of the home agent using the information and the table; and
wherein a data message is thereafter routed to the home agent having the address.
6. The system of claim 5 wherein the address of the home agent is determined statically.
7. The system of claim 5 wherein the address of the home agent is determined dynamically.
8. The system of claim 5 wherein the address is determined from an address pool.
9. The system of claim 5 wherein the network includes a PDSN.
10. The system of claim 5 wherein said mobile subsequently moves to a second network and the address of the HAAA and HA are re-computed.
11. A system for transmitting information between a mobile node and a home agent of the mobile node, the mobile node having an associated home AAA server, the system comprising:
means for determining the address of the HAAA;
means for contacting the HAAA and, responsively, receiving information indicating a methodology of determining the address of the home agent of the mobile node;
means for determining the address of the home agent using information received from the PDSN; and
means for routing the information from the mobile node to the home agent having the address.
12. A computer readable medium having stored therein instructions for causing a processing unit to execute the following method:
determining the address of the HAAA;
contacting the HAAA and, responsively, receiving information indicating a methodology of determining the address of the home agent of the mobile node;
determining the address of the home agent using information received from the PDSN; and
routing the information from the mobile node to the home agent having the address.
13. A computer program for transmitting information between a mobile node and a home agent of the mobile node, the mobile node having an associated home AAA server, comprising:
first code for determining the address of the HAAA;
second code for contacting the HAAA and, responsively, receiving information indicating a methodology of determining the address of the home agent of the mobile node;
third code for determining the address of the home agent using information received from the PDSN; and
fourth code for routing the information from the mobile node to the home agent having the address.
14. A method for tunneling data to a home agent of a mobile node from the mobile node, the home agent having an HAAA server, the mobile node coupled to a first network, the method comprising:
requesting a look-up methodology from the HAAA server of the home agent; responsively, receiving a look-up methodology from the HAAA server;
determining the address of the home agent using a mapping table and the look-up methodology, the mapping table including a plurality of home agent addresses; and
tunneling data to the home agent using the address of the home agent.
15. The method of claim 14 further comprising establishing said table.
16. The method of claim 14 further comprising:
moving the mobile node to a second network;
re-requesting a look-up methodology from the HAAA server of the home agent; responsively, re-receiving a look-up methodology from the HAAA server;
re-determining the address of the home agent using a mapping table and the look-up methodology, the mapping table including a plurality of home agent addresses; and
tunneling data to the home agent using the address of the home agent.
17. A computer readable medium having stored therein instructions for causing a processing unit to execute the following method:
requesting a look-up methodology from the HAAA server of the home agent; responsively, receiving a look-up methodology from the HAAA server;
determining the address of the home agent using a mapping table and the look-up methodology, the mapping table including a plurality of home agent addresses; and
tunneling data to the home agent using the address of the home agent.
18. A computer program for tunneling data between a mobile node and a home agent, comprising:
first code for requesting a look-up methodology from the HAAA server of the home agent;
second code for responsively, receiving a look-up methodology from the HAAA server;
third code for determining the address of the home agent using a mapping table and the look-up methodology, the mapping table including a plurality of home agent addresses; and
fourth code for tunneling data to the home agent using the address of the home agent.
19. A system for tunneling data to a home agent of a mobile node from the mobile node, the home agent having an HAAA server, the mobile node coupled to a first network, the system comprising:
means for requesting a look-up methodology from the HAAA server of the home address of the mobile node;
means for, responsively, receiving a look-up methodology from the HAAA server;
means for determining the address of the home agent using a mapping table and the look-up methodology, the mapping table including a plurality of home agent addresses; and
means for tunneling data to the home agent using the address of the home agent.
20. A system for reclaiming and releasing session resources on a PDSN, proxy server and home agent during packet data serving area traversal, the system comprising:
means for requesting a reclamation of resources on the PDSN by the proxy server, upon detection of traversal of the mobile node from a first coverage area to a second coverage area;
means for, responsively, receiving a resource management from the PDSN;
means for acknowledging the resource management request with a resource-free-response by the proxy server to the PDSN;
means for releasing resources allocated to a PDSN session from the home agent, by the PDSN; and
means for responding to the de-RRQ messaging triggered by resource management, with a de-RRP message.
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Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060045080A1 (en) * | 2004-08-31 | 2006-03-02 | Islam M K | System and method for handling simple IP to mobile IP transition |
US20070016774A1 (en) * | 2005-07-15 | 2007-01-18 | Sanjay Bakshi | Secure proxy mobile apparatus, systems, and methods |
US20070042776A1 (en) * | 2005-08-19 | 2007-02-22 | Sanjay Bakshi | Wireless packet-switched paging apparatus, systems, and methods |
US20070086395A1 (en) * | 2005-10-14 | 2007-04-19 | Sanjay Bakshi | Wireless paging apparatus, systems and methods |
US20070104179A1 (en) * | 2005-10-21 | 2007-05-10 | Roshni Srinivasan | Sleep-mode wireless cell reselection apparatus, systems, and methods |
US20070268919A1 (en) * | 2006-05-19 | 2007-11-22 | Futurewei Technologies, Inc. | Using DHCPv6 and AAA for Mobile Station Prefix Delegation and Enhanced Neighbor Discovery |
US20080043758A1 (en) * | 2004-09-30 | 2008-02-21 | Gerardo Giaretta | Method and System for Controlling Mobility in a Communication Network, Related Network and Computer Program Product Therefor |
US20080318568A1 (en) * | 2006-03-01 | 2008-12-25 | Huawei Technologies Co., Ltd. | Method and apparatus for determining home agent attached by mobile node |
US20080316962A1 (en) * | 2005-10-19 | 2008-12-25 | Huawei Technologies Co., Ltd. | Method, system and apparatus for performing mobile internet protocol deregistering |
US7602795B1 (en) | 2002-08-20 | 2009-10-13 | Sprint Spectrum L.P. | Method and system for identifying a mobile station to a content server |
US7616647B1 (en) | 2003-03-11 | 2009-11-10 | Sprint Spectrum L.P. | Method and system for wireless local number portability |
US20100035643A1 (en) * | 2008-08-07 | 2010-02-11 | Verizon Corporate Services Group Inc. | Hybrid network resource and policy management with mobility support |
CN101873576A (en) * | 2009-04-24 | 2010-10-27 | 大唐移动通信设备有限公司 | Relay node capability report method, system and device |
US20100287278A1 (en) * | 2008-01-08 | 2010-11-11 | Cisco Technology, Inc. | Automatic Proxy Detection and Traversal |
US20110035482A1 (en) * | 2008-05-07 | 2011-02-10 | Huawei Technologies Co., Ltd. | Method for Disconnecting Multiple Hosts from Network, and Network Management Device |
US8356343B1 (en) * | 2008-02-01 | 2013-01-15 | Sprint Communications Company L.P. | Session continuity on reauthentication |
CN104144225A (en) * | 2013-05-10 | 2014-11-12 | 中国电信股份有限公司 | Method and system for controlling allocation of IPv4 address and PDSN |
Families Citing this family (50)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7139829B2 (en) * | 2001-05-08 | 2006-11-21 | Nortel Networks Limited | Identification of unused resources in a packet data network |
US7382748B1 (en) * | 2001-10-24 | 2008-06-03 | Nortel Networks Limited | Assigning a dynamic home agent for a mobile network element |
US7346772B2 (en) * | 2002-11-15 | 2008-03-18 | Cisco Technology, Inc. | Method for fast, secure 802.11 re-association without additional authentication, accounting and authorization infrastructure |
JP4270888B2 (en) * | 2003-01-14 | 2009-06-03 | パナソニック株式会社 | Service and address management method in WLAN interconnection |
US7286512B1 (en) * | 2003-03-07 | 2007-10-23 | Utstar, Inc. | System and method for supporting alternative addressessing in a mobile network |
KR100770848B1 (en) * | 2003-11-06 | 2007-10-26 | 삼성전자주식회사 | Method And System supporting mobility of internet protocol of mobile station in mobile communication system |
US7773554B2 (en) * | 2003-12-03 | 2010-08-10 | John Wallace Nasielski | Methods and apparatus for CDMA2000/GPRS roaming |
US7675885B2 (en) * | 2003-12-03 | 2010-03-09 | Qualcomm Incorporated | Methods and apparatus for CDMA2000/GPRS roaming |
EP1709780A1 (en) * | 2004-01-15 | 2006-10-11 | Interactive People Unplugged AB | Device to facilitate the deployment of mobile virtual private networks for medium/large corporate networks |
US8619701B2 (en) * | 2004-05-03 | 2013-12-31 | Core Wireless Licensing S.A.R.L. | Method of facilitating handoff for CDMA networks using IP protocols |
CN100589374C (en) * | 2004-07-08 | 2010-02-10 | 中兴通讯股份有限公司 | Method for preventing IP attress leakage when using point to point protocol |
KR101086349B1 (en) * | 2004-07-30 | 2011-11-23 | 텔레콤 이탈리아 소시에떼 퍼 아찌오니 | Method And System For Controlling Operation Of A Communication Network, Related Network And Computer Program Product Therefor |
CN102088463B (en) * | 2004-09-30 | 2012-11-28 | 意大利电信股份公司 | Method and system for controlling mobility of communication network, and related network and computer program product |
EP1646189A1 (en) | 2004-10-06 | 2006-04-12 | Matsushita Electric Industrial Co., Ltd. | WLAN radio access network to UMTS radio access network handover with network requested packet data protocol context activation |
US8239563B2 (en) | 2004-10-27 | 2012-08-07 | Marvell International Ltd. | Method and apparatus for using multiple links at a handheld device |
CN100578476C (en) * | 2005-01-25 | 2010-01-06 | 松下电器产业株式会社 | Communication terminal, terminal switching system, and terminal switching method |
CN100450279C (en) * | 2005-03-22 | 2009-01-07 | 华为技术有限公司 | Method for realizing user data management based on wireless system |
KR100678151B1 (en) | 2005-08-01 | 2007-02-02 | 삼성전자주식회사 | Method and system for servicing roaming in mobile communication system |
US7496057B2 (en) * | 2005-08-10 | 2009-02-24 | Cisco Technology, Inc. | Methods and apparatus for optimizations in 3GPP2 networks using mobile IPv6 |
US8539554B2 (en) * | 2005-12-26 | 2013-09-17 | Panasonic Corporation | Mobile network managing apparatus and mobile information managing apparatus for controlling access requests |
JP4754964B2 (en) * | 2005-12-28 | 2011-08-24 | 富士通株式会社 | Radio network control apparatus and radio network control system |
US7885636B2 (en) * | 2006-01-31 | 2011-02-08 | United States Cellular Corporation | Data pre-paid in simple IP data roaming |
US8369357B2 (en) * | 2006-02-28 | 2013-02-05 | Cisco Technology, Inc. | System and method for providing simultaneous handling of layer-2 and layer-3 mobility in an internet protocol network environment |
CN101496387B (en) | 2006-03-06 | 2012-09-05 | 思科技术公司 | System and method for access authentication in a mobile wireless network |
US7715562B2 (en) | 2006-03-06 | 2010-05-11 | Cisco Technology, Inc. | System and method for access authentication in a mobile wireless network |
CN101079704B (en) * | 2006-05-24 | 2010-08-18 | 中兴通讯股份有限公司 | System and method for implementing mobile IP access |
US7782824B2 (en) * | 2006-07-20 | 2010-08-24 | Cisco Technology, Inc. | Method and system for handling a mobile endpoint in a wireless network |
KR101398908B1 (en) * | 2007-05-22 | 2014-05-26 | 삼성전자주식회사 | Method and system for managing mobility in mobile telecommunication system using mobile ip |
US20080313332A1 (en) * | 2007-06-18 | 2008-12-18 | Qualcomm Incorporated | Methods and apparatus for resource management in a communication network |
CN101330528B (en) * | 2007-10-25 | 2011-09-21 | 中兴通讯股份有限公司 | Mobile IP network optimization system and implementing method thereof |
KR100940093B1 (en) * | 2008-05-13 | 2010-02-02 | 주식회사 케이티 | Method and system for discovering a dynamic Home Agent for proxy mobile Internet Protocol at handover |
US8898323B2 (en) | 2008-10-22 | 2014-11-25 | Qualcomm Incorporated | Mobility protocol selection in a multi-internet protocol mobility environment |
US8683048B2 (en) * | 2008-11-26 | 2014-03-25 | Qualcomm Incorporated | Apparatus and method for selecting IP services |
US8693368B2 (en) * | 2009-07-22 | 2014-04-08 | Hewlett-Packard Development Company, L.P. | Method and system for remote identification of a network node |
US8566926B1 (en) | 2010-03-18 | 2013-10-22 | Sprint Communications Company L.P. | Mobility protocol selection by an authorization system |
US8340292B1 (en) | 2010-04-01 | 2012-12-25 | Sprint Communications Company L.P. | Lawful intercept management by an authorization system |
US8391858B1 (en) | 2010-06-15 | 2013-03-05 | Sprint Spectrum L.P. | Mitigating the impact of handoffs through comparison of non-preferred wireless coverage areas |
US8359028B1 (en) | 2010-06-15 | 2013-01-22 | Sprint Spectrum L.P. | Mitigating the impact of handoffs through comparison of historical call lengths |
US8649355B1 (en) | 2010-09-01 | 2014-02-11 | Sprint Spectrum L.P. | Supporting simple IP with address translation in a wireless communication device |
US8565129B1 (en) | 2010-09-01 | 2013-10-22 | Sprint Spectrum L.P. | Supporting simple IP with address translation in a proxy mobile IP gateway |
US8892724B1 (en) | 2010-10-08 | 2014-11-18 | Sprint Spectrum L.P. | Assigning a type of address based on expected port utilization |
EP2638775A1 (en) * | 2010-11-08 | 2013-09-18 | Nokia Siemens Networks Oy | Method, apparatus and system for deciding on a control entity for a packet data connection |
US9185606B1 (en) | 2012-10-12 | 2015-11-10 | Sprint Spectrum L.P. | Assignment of wireless network resources |
US10102755B1 (en) | 2013-10-07 | 2018-10-16 | Satcom Direct, Inc. | Method and system for aircraft positioning—automated tracking using onboard global voice and high-speed data |
US9565618B1 (en) | 2013-10-09 | 2017-02-07 | Satcom Direct, Inc. | Air to ground management of multiple communication paths |
US9553658B1 (en) | 2013-10-09 | 2017-01-24 | Satcom Direct, Inc. | Router for aircraft communications with simultaneous satellite connections |
US9577742B1 (en) | 2013-10-10 | 2017-02-21 | Satcom Direct, Inc. | Data compression and acceleration for air to ground communications |
US10049508B2 (en) | 2014-02-27 | 2018-08-14 | Satcom Direct, Inc. | Automated flight operations system |
US9554275B1 (en) | 2014-10-19 | 2017-01-24 | Satcom Direct, Inc. | Voice and SMS communication from a mobile device over IP network and satellite or other communication network |
US10993147B1 (en) | 2015-02-25 | 2021-04-27 | Satcom Direct, Inc. | Out-of-band bandwidth RSVP manager |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5325362A (en) * | 1993-09-29 | 1994-06-28 | Sun Microsystems, Inc. | Scalable and efficient intra-domain tunneling mobile-IP scheme |
US6608832B2 (en) * | 1997-09-25 | 2003-08-19 | Telefonaktiebolaget Lm Ericsson | Common access between a mobile communications network and an external network with selectable packet-switched and circuit-switched and circuit-switched services |
US6512754B2 (en) * | 1997-10-14 | 2003-01-28 | Lucent Technologies Inc. | Point-to-point protocol encapsulation in ethernet frame |
AU745231B2 (en) * | 1997-12-17 | 2002-03-14 | British Telecommunications Public Limited Company | Proxy routing |
US6230012B1 (en) * | 1998-08-07 | 2001-05-08 | Qualcomm Incorporated | IP mobility support using proxy mobile node registration |
US6760444B1 (en) * | 1999-01-08 | 2004-07-06 | Cisco Technology, Inc. | Mobile IP authentication |
JP2000224233A (en) * | 1999-02-04 | 2000-08-11 | Kdd Corp | Mobile communication system |
US6707809B1 (en) * | 1999-02-25 | 2004-03-16 | Utstarcom, Inc. | Method for forwarding data to idle mobile nodes, and home agent control node for use in the method |
DE69927238T2 (en) * | 1999-02-26 | 2006-07-13 | Lucent Technologies Inc. | Mobile IP with quality of service support |
FI108832B (en) * | 1999-03-09 | 2002-03-28 | Nokia Corp | IP routing optimization in an access network |
US6466964B1 (en) * | 1999-06-15 | 2002-10-15 | Cisco Technology, Inc. | Methods and apparatus for providing mobility of a node that does not support mobility |
EP1201068A2 (en) * | 1999-07-16 | 2002-05-02 | 3Com Corporation | Mobile internet protocol (ip) networking with home agent and/or foreign agent functions distributed among multiple devices |
EP1083724A1 (en) * | 1999-09-10 | 2001-03-14 | Lucent Technologies Inc. | Method and apparatus for IP address discovery |
US6622016B1 (en) * | 1999-10-04 | 2003-09-16 | Sprint Spectrum L.P. | System for controlled provisioning of telecommunications services |
EP1219091B1 (en) * | 1999-10-08 | 2006-08-30 | Telefonaktiebolaget LM Ericsson (publ) | Wide area network mobility for ip based networks |
US6684256B1 (en) * | 2000-01-27 | 2004-01-27 | Utstarcom, Inc. | Routing method for mobile wireless nodes having overlapping internet protocol home addresses |
US6795705B1 (en) * | 2000-10-31 | 2004-09-21 | Utstarcom, Inc. | Hot standby protocol for wireless devices |
CA2428712A1 (en) * | 2000-11-13 | 2002-05-30 | Ecutel | System and method for secure network mobility |
-
2001
- 2001-05-04 US US09/849,834 patent/US6978128B1/en not_active Expired - Fee Related
-
2002
- 2002-04-29 CN CNB021190127A patent/CN100352228C/en not_active Expired - Fee Related
- 2002-04-30 JP JP2002128995A patent/JP3964257B2/en not_active Expired - Fee Related
- 2002-05-03 KR KR1020020024401A patent/KR20020084828A/en not_active Application Discontinuation
-
2005
- 2005-09-26 US US11/235,589 patent/US20060019708A1/en not_active Abandoned
-
2007
- 2007-03-19 JP JP2007071303A patent/JP2007228602A/en active Pending
Cited By (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7602795B1 (en) | 2002-08-20 | 2009-10-13 | Sprint Spectrum L.P. | Method and system for identifying a mobile station to a content server |
US7990986B1 (en) | 2002-08-20 | 2011-08-02 | Sprint Spectrum L.P. | Method and system for identifying a mobile station to a content server |
US7616647B1 (en) | 2003-03-11 | 2009-11-10 | Sprint Spectrum L.P. | Method and system for wireless local number portability |
US20060045080A1 (en) * | 2004-08-31 | 2006-03-02 | Islam M K | System and method for handling simple IP to mobile IP transition |
US20100177705A1 (en) * | 2004-08-31 | 2010-07-15 | Research In Motion Limited | System and method for handling simple ip to mobile ip transition |
US7710931B2 (en) * | 2004-08-31 | 2010-05-04 | Research In Motion Limited | System and method for handling simple IP to mobile IP transition |
US8787334B2 (en) | 2004-08-31 | 2014-07-22 | Blackberry Limited | System and method for handling simple IP to mobile IP transition |
US8593963B2 (en) | 2004-09-30 | 2013-11-26 | Telecom Italia S.P.A. | Method and system for controlling mobility in a communication network, related network and computer program product therefor |
US20080043758A1 (en) * | 2004-09-30 | 2008-02-21 | Gerardo Giaretta | Method and System for Controlling Mobility in a Communication Network, Related Network and Computer Program Product Therefor |
US9357374B2 (en) | 2004-09-30 | 2016-05-31 | Telecom Italia S.P.A. | Method and system for controlling mobility in a communication network, related network and computer program product therefor |
US20110164498A1 (en) * | 2004-09-30 | 2011-07-07 | Telecom Italia S.P.A | Method and System for Controlling Mobility in a Communication Network, Related Network and Computer Program Product Therefor |
US7940779B2 (en) | 2004-09-30 | 2011-05-10 | Telecom Italia S.P.A. | Method and system for controlling mobility in a communication network, related network and computer program product therefor |
US7313394B2 (en) * | 2005-07-15 | 2007-12-25 | Intel Corporation | Secure proxy mobile apparatus, systems, and methods |
US20070016774A1 (en) * | 2005-07-15 | 2007-01-18 | Sanjay Bakshi | Secure proxy mobile apparatus, systems, and methods |
US20070042776A1 (en) * | 2005-08-19 | 2007-02-22 | Sanjay Bakshi | Wireless packet-switched paging apparatus, systems, and methods |
US20070086395A1 (en) * | 2005-10-14 | 2007-04-19 | Sanjay Bakshi | Wireless paging apparatus, systems and methods |
US20100268787A1 (en) * | 2005-10-19 | 2010-10-21 | Huawei Technologies Co., Ltd. | Method, System and Apparatus for Performing Mobile Internet Protocol Deregistering |
US7961681B2 (en) * | 2005-10-19 | 2011-06-14 | Huawei Technologies Co., Ltd. | Method, system and apparatus for performing mobile internet protocol deregistering |
US8112084B2 (en) | 2005-10-19 | 2012-02-07 | Huawei Technologies Co., Ltd. | Method, system and apparatus for performing mobile internet protocol deregistering |
US20080316962A1 (en) * | 2005-10-19 | 2008-12-25 | Huawei Technologies Co., Ltd. | Method, system and apparatus for performing mobile internet protocol deregistering |
US7693555B2 (en) | 2005-10-21 | 2010-04-06 | Intel Corporation | Sleep-mode wireless cell reselection apparatus, systems, and methods |
US20110103279A1 (en) * | 2005-10-21 | 2011-05-05 | Roshni Srinivasan | Sleep-mode wireless cell reselection apparatus, systems, and methods |
US20070104179A1 (en) * | 2005-10-21 | 2007-05-10 | Roshni Srinivasan | Sleep-mode wireless cell reselection apparatus, systems, and methods |
US8259634B2 (en) | 2005-10-21 | 2012-09-04 | Intel Corporation | Sleep-mode wireless cell reselection apparatus, systems, and methods |
US20080318568A1 (en) * | 2006-03-01 | 2008-12-25 | Huawei Technologies Co., Ltd. | Method and apparatus for determining home agent attached by mobile node |
US20070268919A1 (en) * | 2006-05-19 | 2007-11-22 | Futurewei Technologies, Inc. | Using DHCPv6 and AAA for Mobile Station Prefix Delegation and Enhanced Neighbor Discovery |
US8625609B2 (en) * | 2006-05-19 | 2014-01-07 | Futurewei Technologies Inc. | Using DHCPv6 and AAA for mobile station prefix delegation and enhanced neighbor discovery |
US20100287278A1 (en) * | 2008-01-08 | 2010-11-11 | Cisco Technology, Inc. | Automatic Proxy Detection and Traversal |
US8356343B1 (en) * | 2008-02-01 | 2013-01-15 | Sprint Communications Company L.P. | Session continuity on reauthentication |
US20110035482A1 (en) * | 2008-05-07 | 2011-02-10 | Huawei Technologies Co., Ltd. | Method for Disconnecting Multiple Hosts from Network, and Network Management Device |
US8909750B2 (en) * | 2008-05-07 | 2014-12-09 | Huawei Technologies Co., Ltd. | Method for disconnecting multiple hosts from network when the gateway mobile station used by the multiple hosts indicates it is exiting the network, and network management device |
US8265676B2 (en) * | 2008-08-07 | 2012-09-11 | Verizon Patent And Licensing Inc. | Hybrid network resource and policy management with mobility support |
US20100035643A1 (en) * | 2008-08-07 | 2010-02-11 | Verizon Corporate Services Group Inc. | Hybrid network resource and policy management with mobility support |
CN101873576A (en) * | 2009-04-24 | 2010-10-27 | 大唐移动通信设备有限公司 | Relay node capability report method, system and device |
CN104144225A (en) * | 2013-05-10 | 2014-11-12 | 中国电信股份有限公司 | Method and system for controlling allocation of IPv4 address and PDSN |
Also Published As
Publication number | Publication date |
---|---|
CN1384648A (en) | 2002-12-11 |
KR20020084828A (en) | 2002-11-11 |
JP2003018195A (en) | 2003-01-17 |
JP2007228602A (en) | 2007-09-06 |
CN100352228C (en) | 2007-11-28 |
JP3964257B2 (en) | 2007-08-22 |
US6978128B1 (en) | 2005-12-20 |
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