Patent application number | Description | Published |
20080198805 | Optimized Reverse Tunnelling for Packet Switched Mobile Communication Systems - A method and a server acting as a Home Agent are provided for packet switched data transmission between a first mobile node and a correspondent mobile node in a mobile communication system comprising a plurality of mobile networks. Each of the first mobile node and the correspondent mobile node are allocated to respective home networks, and a network server is provided as a home agent to each mobile node, respectively. Then, data packets are routed from the first mobile node to the correspondent mobile node, over a first data tunnel from the first mobile node to any first one of the home agents and over a second data tunnel from said first one of the home agents to the correspondent mobile node without passing the respective other home agent. | 08-21-2008 |
20080253382 | Multiple Interface Mobile Node With Simultaneous Home- And Foreign Network Connection - The invention relates to a method for node management in a packet-switched network, wherein a first node acts as a proxy for a second node, both nodes having network-layer addresses and link-layer addresses, the network-layer addresses at the network layer and the link-layer addresses at the link layer being used for communication in the packet-switched network. The method comprises the following steps performed by the first node: The first node receives from the second node a request to receive and forward packets addressed to the second node's network-layer address, whereby the same network-layer address is associated with the first node and the second node, and the first node and the second node have distinct link-layer addresses. The first node advertises to nodes attached to the packet-switched network the first node's link-layer address as a destination address for the second node's network-layer address, while the second node does not advertise. The first node receives in response to advertising, packets destined to the second node's network-layer address having the first node's link-layer address; and forwards packets addressed to the second node's network-layer address to the second node using its link-layer address. | 10-16-2008 |
20080256220 | Enabling Simultaneous Use of Home Network and Foreign Network by a Multihomed Mobile Node - The invention relates to a method performed by a home agent serving a mobile node in a home network of the mobile node upon attachment of a mobile node to the home network as well as to the home agent. Further, the invention also relates to a method for enabling simultaneous use of a plurality of interfaces by a mobile node being attached to a home network through one of the plurality of interfaces and to at least one foreign network through at least another interface of the plurality of interfaces. Moreover, the invention provides a mobile node and a proxy acting on behalf of the mobile node. To enable a mobile node to use a home network and at least one further foreign network for communications the invention suggests the registration of the mobile node's home address or of a network node within its home network as a care-of address in the home network. | 10-16-2008 |
20080291867 | Dynamic Discovery of Home Agent With Specific Binding - The invention relates to a method for obtaining a home node address in a packet switched network comprising nodes. The method comprises the steps of a first node sending to a first home node of a home network a request containing information about a home address of a mobile node to determine whether a binding with said home address indicating a registration of said mobile node at the first home node exists; the first home node receiving the request, said first home node comprising a stored binding table; determining whether the binding with said home address exists in any home node of the home network; and if the home address of the mobile node is in the binding table of any of the home nodes in the home network, the first node receiving a reply comprising the address of the home node with said binding. | 11-27-2008 |
20090010271 | POLICY CONTROL IN THE EVOLVED SYSTEM ARCHITECTURE - The invention relates to a method and system for policy control in a data packet network comprising a user equipment, a gateway and a home policy control node. The method comprises the steps of establishing a session between the user equipment and an application function. Then a session identifier is generated by the user equipment, and the same session identifier is generated by the home policy control node. The user equipment requests bearer establishment from the data packet network and marks bearer establishment packets with said session identifier. The gateway derives a user equipment identifier from the bearer establishment packets and determines policy decisions based on the session identifier and the user equipment identifier. The user equipment marks data packets sent over the established bearer with the session identifier; and the gateway applies policy and charging information for the session to the marked data packets. | 01-08-2009 |
20090059829 | SLEEP-STATE FOR MOBILE TERMINAL AND SERVICE INITIATION FOR MOBILE TERMINALS IN SLEEP-STATE - The invention relates to the initiation of a service to a mobile terminal capable of communicating via at least a first and second access network. Further, the invention relates to a reduction of power consumption of mobile terminals supporting connectivity to at least two access networks. The invention also relates to mobile communication systems and in particular to mobile communications through heterogeneous access networks. In order to prove improved method for initiating services to mobile terminals and/or to reduce power consumption of mobile terminals, the invention introduces of a sleep state that can be entered by the terminal for an access system if same is not used. Upon requesting a service from/to the mobile terminal, the mobile terminal starts service initiation through a second access system and transits back to active state for the first access system for service provision. | 03-05-2009 |
20090097453 | METHOD AND SYSTEM FOR FAST HANDOVERS USING DYNAMIC ROUTER ADVERTISEMENTS - The invention relates to a method for managing the movement of a mobile node from a first router in a first network to a second router in a second network, wherein the mobile node communicates with a corresponding node. In order to enable seamless communication between the mobile node and the corresponding node, the second router is dynamically configured by the first router to transmit a router advertisement message to the mobile node, the router advertisement message comprising a subnet prefix of an IP address of the mobile node, said subnet prefix belonging to the first network. A layer 3 link change as observed by the mobile node can be postponed and a default router of the mobile node can be changed to the new access router immediately after the layer 2 handover, thus enabling very fast handovers without requiring modifications to the mobile node implementations. | 04-16-2009 |
20090129314 | ROUTE OPTIMIZATION WITH LOCATION PRIVACY SUPPORT - The invention relates to a method for route optimisation of packet switched data transmissions between a first mobile node and a second mobile node in a mobile communication system comprising a plurality of access networks. The method comprises the step of transmitting return routability protocol packets and data packets. The return routability protocol packets and data packets are analysed, and at least part of an address comprised in headers of the return routability protocol packets and data packets is removed. | 05-21-2009 |
20090168698 | METHOD AND APPARATUS FOR SIMULTANEOUS LOCATION PRIVACY AND ROUTE OPTIMIZATION FOR COMMUNICATION SESSIONS - The invention relates to a method for routing packets in a system of packet-switched networks comprising a plurality of home agents, at least one mobile node and at least one correspondent node, the mobile node having at least a first home address and communicating with the correspondent node over a first of the plurality of home agents. The method comprises the following steps carried out by the mobile node: receiving an application layer request message from the correspondent node; looking up a correspondent node address in a part of the application layer request message; locating a second of the plurality of home agents in proximity to a direct path between the mobile node and the correspondent node using the correspondent node address; bootstrapping with the second home agent to obtain a second home address; including the second home address in a part of an application layer response message to the correspondent node to enable the correspondent node to use the second home address for data communications with the mobile node. | 07-02-2009 |
20090201855 | MOBILE IPV6 OPTIMISED REVERSE TUNNELLING FOR MULTI-HOMED TERMINALS - The invention relates to a method for packet-switched data transmission between a multi-homed mobile node and a correspondent node in a mobile communication system comprising a plurality of mobile networks. The method comprises the steps of selecting by the mobile node one of its home addresses to be used for communication with the correspondent node. The mobile node registers at least one of a plurality of addresses assigned to a considered network interface as care-of-address at a mobile node's home agent responsible for the selected home address. The correspondent node's home agent and mobile node's home agent receive and store candidate proxy home agent addresses. A correspondent node's home agent sends a request to the correspondent node. The correspondent node registers at least one of a plurality of addresses assigned to a considered network interface as care-of-address at the correspondent node's home agent. At least one of the proxy home agent addresses, one of the mobile node's care-of-addresses, and one of the correspondent node's care-of-addresses is selected on both the mobile node's home agent and the corresponding node's home agent, and the mobile node is triggered by the mobile node's home agent and the correspondent node by the corresponding node's home agent to switch a tunnel, so that two endpoints of the tunnel are one of the selected proxy home agent addresses and the selected mobile node's care-of addresses. | 08-13-2009 |
20090216906 | INTER-DOMAIN CONTEXT TRANSFER USING CONTEXT TRANSFER MANAGERS - A method and apparatus for improved context transfer in heterogeneous networks is presented. Context information is collected from source entities in a first access network by a context transfer manager and transmitted to a context transfer manager of a second access network which forwards the context information to target entities therein, in one of the context transfer managers at least a part of the context information is translated from a format supported in the first access network to another format supported in the second access network. The method may be carried out proactively preceding a handover or reactively following a handover. In one embodiment, context transfer within one access domain is performed directly between access routers, whereas context transfer between different access domains is performed via the context managers. In another embodiment, beacons from access points are counted in order to determine candidates for a pending handover. | 08-27-2009 |
20090307485 | METHOD FOR MITIGATING DENIAL OF SERVICE ATTACKS AGAINST A HOME AGAINST - The invention relates to a method for mitigating the effects of a DoS attack against a home agent supporting mobility for a plurality of mobile nodes. Furthermore the invention also relates to a home agent, a mobile node and a communication system implementing the method for mitigating the effects of a DoS attack against a home agent supporting mobility for a plurality of mobile nodes. To consider the problem of DoS attacks in the design of a mechanism for improving communication systems enabling mobility of mobile nodes, the invention proposes to configure a plurality of addresses at which the home agent is reachable in a communications network and to assign to each of the mobile nodes at least one of the plurality of home agent addresses. If a denial of service attack is detected by the home agent, the home agent de-configures the home agent address to which data packets of the denial of service attack are destined. | 12-10-2009 |
20100027509 | LOCAL MOBILITY ANCHOR RELOCATION AND ROUTE OPTIMIZATION DURING HANDOVER OF A MOBILE NODE TO ANOTHER NETWORK AREA - The invention relates to a method for managing the mobility of a mobile node that moves to a different network, but keeps the same IP address. It is proposed to perform route optimization by a Proxy MIP agent on behalf of the MN, thereby shortening the data-path while allowing network-based mobility. At session setup with a correspondent node, the PCC system in the home network derides whether route optimization is to be performed for the communication session. The PMIPa requests relevant information for the route optimization, including the decision for route optimization and the addresses of MN and CN, from the PCC system in the home network, when the MN attaches to the new network area. Accordingly, route optimization is performed by using the Return Routability Procedure according to MIPv6, thereby applying the MN's IP address as Home Address, and the PMIPa's address as Care-of Address of the MN. | 02-04-2010 |
20100046558 | HEADER REDUCTION OF DATA PACKETS BY ROUTE OPTIMIZATION PROCEDURE - The invention relates to a method for reducing the header size of data packets exchanged between a Mobile Node and its Home Agent. Different sort of headers are utilized between a Correspondent Node and the MN's HA, and between the MN and its HA. The sort of header used between the MN and its HA allows to reduce the header size of exchanged packets on said data path section, as only one header is necessary, compared to the necessity of two headers of the previous sort, used between the CN and the HA. To achieve this, a modified route optimization procedure is performed between the MN and its HA, wherein the HA participates in the RO on behalf of the CN. Thus, the RO remains transparent for the CN, while the MN thinks normal RO is happening. The invention also relates to several network entities that participate in the method. | 02-25-2010 |
20100054133 | Loop Detection For Mobile IP Home Agents - The present invention relates to a method and computer-readable medium for loop detection in data packet communication utilizing a tunnel in a network comprising a plurality of nodes. The method comprises the steps of, when a first node transmits a data packet, encoding an identification of the first node in at least two header fields of the data packet to be transmitted, and when the first node receives a data packet, analysing the at least two header fields of the data packet, deciding if a loop exists by determining if the data packet was sent by the first node itself, based on the analysis of the at least two header fields of the data packet. | 03-04-2010 |
20100056175 | MOBILITY MANAGEMENT IN COMMUNICATION NETWORKS - The invention relates to a method for tracking locations of mobile terminals in a communication network. Further, the invention relates to a communication network and apparatuses therein capable of performing individual steps of the method according to different embodiments of the invention. To decrease the signaling load imposed by mobility related signaling the invention suggests to group mobile terminals in so called mobility groups and to reduce the signaling overhead by performing a location update on a per-mobility group basis. In one exemplary embodiment of the invention this is realized by only one of the mobile terminals in a mobility group sending a group location update on behalf of the group to trigger the location update for the mobility group. Alternatively, in another embodiment of the invention, a network operator trusted or controlled entity sends a group location update on behalf of the group to trigger the location update for the mobility group. | 03-04-2010 |
20100199332 | Access-Network to Core-Network Trust Relationship Detection for a Mobile Node - The invention provides a method for trust relationship detection between a core and access network for a user equipment. The gist is that a security tunnel establishment procedure is used so one entity, be it part of the core network or be it the user equipment itself, is provided with information to determine whether the access network is trusted or untrusted. The information may comprise a first IP address/prefix, which is initially assigned to the user equipment, upon attaching to the access network. The necessary information may further comprise a second IP address/prefix, which is an address/prefix that is allocated at a trusted entity of the core network. Depending which entity determines the trust relationship of the access network, it might be necessary to transmit either the first IP address/prefix or the second IP address/prefix or the first and the second IP address/prefix using the security tunnel establishment procedure. | 08-05-2010 |
20100215019 | DETECTION OF MOBILITY FUNCTIONS IMPLEMENTED IN A MOBILE NODE - The invention relates to a method for configuring an IP address of a mobile node attaching to a first access network during an inter-access technology handover from another, second access network. Moreover, the invention relates to a mobile access gateway and a mobile node that participate in this method. First and second access network belong to a network domain offering a network-based mobility function. In order to detect whether a mobile node implements a network-based mobility function a virtual interface discovery is performed by checking whether the mobile node also configures the address according to the home network prefix offered to the mobile node before the handover on its interface to the first access network. In parallel, an address configuration is performed. Based on the detection of whether a virtual interface is implemented at the mobile node, the mobile access gateway may decide whether to use network-based mobility or client-based mobility and change the address configuration. | 08-26-2010 |
20100284331 | MOBILE IP ROUTE OPTIMIZATION IN IP VERSION TRANSITION SCENARIOS - The invention relates to a method for routing packets in a system of packet-switched networks using different internet protocol versions. The system comprises a plurality of home agents, at least one mobile node and at least one correspondent node. A first mobile node is configured with at least one topologically correct internet protocol address of a first internet protocol version and is located in a network supporting at least routing of packets having a header of the first internet protocol version. The method comprises the following steps. Communication is requested with a first correspondent node being configured with at least an internet protocol address of a second internet protocol version and being located in a network supporting at least the routing of packets having a header of the second internet protocol version, by an application on the first mobile node. A first of the plurality of home agents is located in proximity to a direct path between the first mobile node and the first correspondent node, the first home agent being located in a network supporting at least the routing of packets to the first mobile node with the packets having a header of the first internet protocol version and the routing of packets to the first correspondent node with the packets having a header of the second internet protocol version. Bootstrapping is carried out with the first home agent to obtain a first home address of the second internet protocol version and other communication parameters. The first mobile node's location is registered with the first home agent by sending a first binding update message comprising a first mobile node's topologically correct address of the first internet protocol version as care-of address and the first home address as home address; and the first home agent is used in bi-directional tunnelling mode, the outer header of the tunnelled packets using the first internet protocol version and the inner header of the tunnelled packets using the second internet protocol version, for communication with the first correspondent node, with the communication parameters set up in the bootstrapping step and the first home address as home address. | 11-11-2010 |
20100323700 | NON-3GPP TO 3GPP NETWORK HANDOVER OPTIMIZATIONS - The invention relates to a method for a handover of a mobile node from a non-3GPP to a 3GPP network, and of a mobile node, which is located in a non-3GPP/3GPP network. The handover is improved by discovering an appropriate MME and registering the mobile node at the discovered MME, in advance. This includes to first determine the location of the mobile node in the non-3GPP network, so as to be able to detect an MME in the vicinity of the mobile node's location. The 3GPP contexts are then transmitted to the new MME before the handover is performed. Moreover, the invention teaches to change the Serving-Gateway in the 3GPP network before performing a handover, thereby accelerating the handover. When a handover gets likely, the mobile node's location is determined and a new Serving-Gateway is selected. The data path is changed to go via the new Serving-Gateway. | 12-23-2010 |
20110026435 | HOME AGENT DISCOVERY UPON CHANGING THE MOBILITY MANAGEMENT SCHEME - The invention relates to a method for discovering a home agent serving a mobile node upon the mobile node changing its mobility management scheme in a packet-switched network and the implementation of such method in a mobile node or home agent. In order to propose a home agent discover scheme that maintains session continuity in a seamless manner upon a mobile node changing its mobility management scheme, a mobile node comprises information on its location prior to changing the mobility management scheme to one of the first signaling messages transmitted upon changing the mobility management scheme (home agent discovery message). The receiving node uses this information to identify the home agent serving the mobile node or to provide a hint to the home agent where the mobile node is registered in a response message to the mobile node. This approach may also be used for path optimization when a mobile node moves from a trusted to an un-trusted access network. | 02-03-2011 |
20110110249 | OPTIMIZATION OF 3GPP NETWORK ATTACHMENT - The current invention relates to a method for a network attachment procedure and a user equipment in a wireless mobile network, the wireless mobile network comprising a user equipment with a temporary identity and at least one mobility management entity. The method comprises the steps of providing an estimation whether the user equipment is unknown at the mobility management entity and sending the user equipment's temporary identity during the network attachment procedure. If the user equipment has been estimated to be unknown at the at least one mobility management entity, the user equipment's identity is sent during the network attachment procedure. These steps are carried out by the user equipment. | 05-12-2011 |
20110110335 | INTER-DOMAIN CONTEXT TRANSFER USING CONTEXT TRANSFER MANAGERS - A method and apparatus for improved context transfer in heterogeneous networks is presented. Context information is collected from source entities in a first access network by a context transfer manager and transmitted to a context transfer manager of a second access network which forwards the context information to target entities therein. In one of the context transfer managers at least a part of the context information is translated from a format supported in the first access network to another format supported in the second access network. The method may be carried out proactively preceding a handover or reactively following a handover. In one embodiment, context transfer within one access domain is performed directly between access routers, whereas context transfer between different access domains is performed via the context managers. In another embodiment, beacons from access points are counted in order to determine candidates for a pending handover. | 05-12-2011 |
20110153792 | ENABLING SIMULTANEOUS USE OF HOME NETWORK AND FOREIGN NETWORK BY A MULTIHOMED MOBILE NODE - The invention relates to a method performed by a home agent serving a mobile node in a home network of the mobile node upon attachment of a mobile node to the home network as well as to the home agent. Further, the invention also relates to a method for enabling simultaneous use of a plurality of interfaces by a mobile node being attached to a home network through one of the plurality of interfaces and to at least one foreign network through at least another interface of the plurality of interfaces. Moreover, the invention provides a mobile node and a proxy acting on behalf of the mobile node. To enable a mobile node to use a home network and at least one further foreign network for communications the invention suggests the registration of the mobile node's home address or of a network node within its home network as a care-of address in the home network. | 06-23-2011 |
20110216743 | OPTIMIZATION OF HANDOVERS TO UNTRUSTED NON-3GPP NETWORKS - The invention relates to a method for ensuring IP session continuity upon a handover of a mobile node to a non-3GPP network, wherein an ongoing IP session of the mobile node goes via a packet data network gateway. For non-3GPP networks it is necessary to discover a security gateway and to then establish the corresponding tunnels to the ePDG to form the new data path; a security tunnel between the mobile node and the security gateway, and an IP tunnel between the packet data network gateway and the security gateway. In order to prepare the handover to possible non-3GPP accesses, the two tunnels are pre-established, however maintained deactivated until their use is actually needed. Accordingly, when handing over to the non-3GPP network, the IP session may be continued without any significant interruption by activating the already established tunnels. | 09-08-2011 |
20110238822 | DETECTION OF THE MOBILITY MANAGEMENT FUNCTION USED BY THE NETWORK - The invention relates to a method and mobile node capable of detecting whether or not the network to which the mobile node is attached is using a network-based mobility management function for the mobile node or not. In order to enable a mobile node to detect whether the network is using a network-based mobility function for the mobile node, upon establishment of a PDN connection or IP session, the mobile node sends a probe message to the network destined to itself and determines based on the modifications of the probe message returned to the mobile node whether the network is using a network-based mobility function for the mobile node or not. | 09-29-2011 |
20110261787 | SECURE TUNNEL ESTABLISHMENT UPON ATTACHMENT OR HANDOVER TO AN ACCESS NETWORK - The invention relates to a method, mobile node and computer-readable medium for establishing (or pre-establishing) a secure tunnel to an ePDG to prepare for a mobile node attachment or handover to another access network. To reduce the delay of a handover or upon attachment of a mobile node to an access network implied by mechanisms to discover a ePDG, the mobile node maintains a reachability list that can be consulted to identify an ePDG or ePDGs that are reachable in the target access network, i.e. to which the mobile node may establish a secure tunnel. If the mobile node can identify a reachable ePDG for a given access network from the reachability list, the mobile node (pre-)establishes a secure tunnel to the ePDG upon attaching to the given access network. In alternative solutions DNS, DHCP or other mechanism can be used to provide the mobile node with information on ePDGs in its vicinity. | 10-27-2011 |
20120188944 | HOME AGENT ON A HOME LINK - In node management in a packet-switched network, a first node acts as a proxy for a second node. Both nodes have network-layer addresses at the network layer and link-layer addresses at the link layer. The first node receives a request to receive and forward packets addressed to the second node's network-layer address. The same network-layer address is associated with the first and the second node, and the first and the second node have distinct link-layer addresses. The first node advertises to nodes attached to the packet-switched network the first node's link-layer address as a destination address for the second node's network-layer address; the second node does not advertise. The first node receives in response to advertising, packets destined to the second node's network-layer address having the first node's link-layer address and forwards packets addressed to the second node's network-layer address to the second node using its link-layer address. | 07-26-2012 |
20120238266 | ENABLING SIMULTANEOUS USE OF HOME NETWORK AND FOREIGN NETWORK BY A MULTIHOMED MOBILE NODE - The invention relates to a method performed by a home agent serving a mobile node in a home network upon attachment of a mobile node to the home network as well as to the home agent. The invention also relates to a method for enabling simultaneous use of a plurality of interfaces by a mobile node being attached to a home network through one of the plurality of interfaces and to at least one foreign network through at least another interface of the plurality of interfaces. Moreover, the invention provides a mobile node and a proxy acting on behalf of the mobile node. To enable a mobile node to use a home network and at least one foreign network for communications the invention suggests the registration of the mobile node's home address or of a network node's address within its home network as a care-of address in the home network. | 09-20-2012 |
20120276904 | SLEEP-STATE FOR MOBILE TERMINAL AND SERVICE INITIATION FOR MOBILE TERMINALS IN SLEEP-STATE - The invention relates to the initiation of a service to a mobile terminal capable of communicating via at least a first and second access network. Further, the invention relates to a reduction of power consumption of mobile terminals supporting connectivity to at least two access networks. The invention also relates to mobile communication systems and in particular to mobile communications through heterogeneous access networks. In order to prove improved method for initiating services to mobile terminals and/or to reduce power consumption of mobile terminals, the invention introduces of a sleep state that can be entered by the terminal for an access system if same is not used. Upon requesting a service from/to the mobile terminal, the mobile terminal starts service initiation through a second access system and transits back to active state for the first access system for service provision. | 11-01-2012 |
20120297186 | ROUTE OPTIMIZATION WITH LOCATION PRIVACY SUPPORT - The invention relates to a method for route optimisation of packet switched data transmissions between a first mobile node and a second mobile node in a mobile communication system comprising a plurality of access networks. The method comprises the step of transmitting return routability protocol packets and data packets. The return routability protocol packets and data packets are analysed, and at least part of an address comprised in headers of the return routability protocol packets and data packets is removed. | 11-22-2012 |
20130083734 | DYNAMIC DISCOVERY OF HOME AGENT WITH SPECIFIC BINDING - The invention relates to a method for obtaining a home node address in a packet switched network comprising nodes. The method comprises the steps of a first node sending to a first home node of a home network a request containing information about a home address of a mobile node to determine whether a binding with said home address indicating a registration of said mobile node at the first home node exists; the first home node receiving the request, said first home node comprising a stored binding table; determining whether the binding with said home address exists in any home node of the home network; and if the home address of the mobile node is in the binding table of any of the home nodes in the home network, the first node receiving a reply comprising the address of the home node with said binding. | 04-04-2013 |
20130136072 | GROUP-BASED PAGING FOR MACHINE-TYPE-COMMUNICATION (MTC) DEVICES - The invention relates to a method for paging a group of MTC devices, and for transmitting parameter information to the MTC devices using the paging mechanism. MTC devices are grouped together and a different group ID per group to which the MTC device belongs is assigned to the MTC device. A specific group paging resource indication is determined for each group wherein each MTC device is assigned one of the group paging resource indications. The network pages MTC devices of a group by transmitting a paging message at the corresponding channel resources and including the corresponding group ID. Additionally, the group paging resource indications of several groups of MTC devices can be aligned in such a way with the transmissions and re-transmissions by the network, that the different groups respectively receive the transmission and re-transmissions of the paging message. | 05-30-2013 |
20130225163 | ENABLING SIMULTANEOUS USE OF HOME NETWORK AND FOREIGN NETWORK BY A MULTIHOMED MOBILE NODE - The invention relates to a method performed by a home agent serving a mobile node in a home network upon attachment of a mobile node to the home network as well as to the home agent. The invention also relates to a method for enabling simultaneous use of a plurality of interfaces by a mobile node being attached to a home network through one of the plurality of interfaces and to at least one foreign network through at least another interface of the plurality of interfaces. Moreover, the invention provides a mobile node and a proxy acting on behalf of the mobile node. To enable a mobile node to use a home network and at least one foreign network for communications the invention suggests the registration of the mobile node's home address or of a network node's address within its home network as a care-of address in the home network. | 08-29-2013 |
20130322311 | HOME AGENT DISCOVERY UPON CHANGING THE MOBILITY MANAGEMENT SCHEME - The invention relates to a method for discovering a home agent serving a mobile node upon the mobile node changing its mobility management scheme in a packet-switched network and the implementation of such method in a mobile node or home agent. In order to propose a home agent discover scheme that maintains session continuity in a seamless manner upon a mobile node changing its mobility management scheme, a mobile node comprises information on its location prior to changing the mobility management scheme to one of the first signaling messages transmitted upon changing the mobility management scheme (home agent discovery message). The receiving node uses this information to identify the home agent serving the mobile node or to provide a hint to the home agent where the mobile node is registered in a response message to the mobile node. | 12-05-2013 |
20130324125 | NON-3GPP TO 3GPP NETWORK HANDOVER OPTIMIZATIONS - A method for a handover of a mobile node from a non-3GPP to a 3GPP network, and of a mobile node, which is located in a non-3GPP/3GPP network. The handover is improved by discovering an appropriate MME and registering the mobile node at the discovered mobility management entity (MME), in advance. This includes to first determine the location of the mobile node in the non-3GPP network, so as to be able to detect an MME in the vicinity of the mobile node's location. The 3GPP contexts are then transmitted to the new MME before the handover is performed. Moreover, the Serving-Gateway in the 3GPP network is changed before performing a handover, thereby accelerating the handover. When a handover gets likely, the mobile node's location is determined and a new Serving-Gateway is selected. The data path is changed to go via the new Serving-Gateway. | 12-05-2013 |
20140301365 | INTER-DOMAIN CONTEXT TRANSFER USING CONTEXT TRANSFER MANAGERS - A method and apparatus for improved context transfer in heterogeneous networks is presented. Context information is collected from source entities in a first access network by a context transfer manager and transmitted to a context transfer manager of a second access network which forwards the context information to target entities therein. In one of the context transfer managers at least a part of the context information is translated from a format supported in the first access network to another format supported in the second access network. The method may be carried out proactively preceding a handover or reactively following a handover. In one embodiment, context transfer within one access domain is performed directly between access routers, whereas context transfer between different access domains is performed via the context managers. In another embodiment, beacons from access points are counted in order to determine candidates for a pending handover. | 10-09-2014 |
20140341041 | DEVICE TRIGGERING AND APN-BASED CONGESTION CONTROL - The present invention relates to device triggering in case of a congestion control. A triggering server transmits a device trigger request to a terminal over a communication network including a serving network node. The network node evaluates whether the connection can be established from the terminal to the server, including determining whether the network is congested and/or whether a back-off timer is running and/or the remaining time of the back-off timer at the terminal. Then the network node transmits a delivery delay indication to a device triggering control server to provide it with the delivery delay indication indicating at least one of impossibility of establishing the connection to the server after the trigger or a data transmission delay. | 11-20-2014 |