Patent application number | Description | Published |
20090219832 | FAST CONFIGURATION OF A DEFAULT ROUTER FOR A MOBILE NODE IN A MOBILE COMMUNICATION SYSTEM - The invention relates to a method for fast configuring of a default router for a mobile node in a mobile communication system. A default router is used by a mobile node to transmit outgoing data to. The mobile node moves from a first to a second network area, which are respectively connected to a first and second router. In order to update the default router, after changing an attachment of the mobile node to the network, the new second router is adapted to transmit a notification to the mobile node, for changing its default router to the new router. According to the invention, the second router may also transmit a message to inform the mobile node about an expiration of the old first router. The new router may also send a message, including an indication about a new rust-hop router for the outgoing data of the mobile node. | 09-03-2009 |
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 |
20100046434 | NETWORK-BASED AND HOST-BASED MOBILITY MANAGEMENT IN PACKET-BASED COMMUNICATION NETWORKS - The present invention describes a method for signalling to a mobility anchor point a position of a mobile node in a network using a network-based mobility management scheme for managing the mobility of the mobile node, said method comprising receiving, by a network element, from the mobile node, during or after network authentication of the mobile node, a sequence number used by a process implementing a mobile node-based mobility management scheme for managing the mobility of the mobile node, and transmitting, by the network element, to the mobility anchor point a message on a position of the mobile node in the network, wherein said message comprises the received sequence number. A common sequence number variable for BU and PBU messages is used, so that the HA is able to determine a correct transmission order of PBU/BU messages based on the sequence number in the message. | 02-25-2010 |
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 |
20100097983 | CONNECTION BASED LOCAL IP-MOBILITY - The invention relates to a method for packet switched data transmission in a local network, the local network comprising a mobile node and a plurality of interconnected connection anchor points each with a link at which the mobile node can attach. The method comprises the steps of detecting a movement of the mobile node from a first connection anchor point to a second connection anchor point, the mobile node communicating via a tunnelled connection between the first and second connection anchor point, maintaining the existing tunnelled connections between the second connection anchor point and the first connection anchor point, and enabling new connections between the mobile node and correspondent nodes using addresses that are topologically correct. | 04-22-2010 |
20100097992 | NETWORK CONTROLLED OVERHEAD 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 (MN) and a gateway that is located between the MN and a Corresponding Node (CN). Different sort of headers are utilized between the MN and the gateway, and between the gateway and the CN. The sort of header, obtained by an optimizing procedure, allows to reduce the header size of exchanged packets on said data path section. To achieve this, a modified route optimization (RO) process is performed between the MN and the gateway, wherein the gateway acts on behalf of the CN. After completing the first RO process, the MN initiates and performs a second RO process with the gateway acting as CN. After completing both route optimization processes, data packet transmission is performed between the CN and the gateway after switching from IPsec tunnel mode to IPsec transport mode. | 04-22-2010 |
20100189103 | Header Size Reduction of Data Packets - The invention relates to a method for reducing the header size of data packets by removing inner headers from the data packets, wherein at least an outer header remains for routing purposes. When removing the inner headers from a data packet, a newly configured address of the receiving and/or the transmitting entity is inserted in the remaining outer header of the data packet. Context information is provided in the receiving entities for reconstructing the removed inner headers, wherein the context information is referred to by the newly configured address that is in the source and/or destination address of the outer header. The reduced data packet is transmitted with only one header, thereby significantly reducing the size of each data packet. The original packet is completely reconstructed at the receiving entity thereby allowing to proceed with the usual processing of each data packet. | 07-29-2010 |
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 |
20100272062 | ROUTE OPTIMIZATION CONTINUITY AT HANDOVER FROM NETWORK-BASED TO HOST-BASED MOBILITY - To achieve this object the current invention provides a method, a mobile node, a mobile access gateway, a home agent and a communication system for handover of a mobile node between access networks either supporting network based mobility or not supporting network based mobility, in a packet switched communication network comprising at least the mobile, mobile access gateway, a correspondent node and a home agent. The method comprises the steps of performing proxy route optimization towards the correspondent node on behalf of the mobile node, performing handover from a current access network to a target access network, and determining whether the proxy route optimization is needed after the handover. If the proxy route optimization is needed after the handover, it is determined whether return routability based route optimization or home based route optimization are to be carried out, and if return routability based route optimization is to be carried out information regarding the proxy route optimization is sent to the mobile node by the home agent. If home agent based route optimization is to be carried out the method further comprises the following steps of generating and managing a route optimization state in a mobile node by the mobile node's home agent, and updating the correspondent nodes routing state with the mobile node's new location. | 10-28-2010 |
20100296481 | METHODS IN MIXED NETWORK- AND HOST-BASED MOBILITY MANAGEMENT - A first aspect of the invention relates to a method for improving security at a local mobility anchor implementing both a network-based and a host-based mobility management scheme for managing the mobility of a mobile node. It suggests a method for verifying an attachment of a mobile node (MN) to a network element in a network. A second aspect of the invention relates to a method to be implemented in a mobility anchor node, which detects whether a race condition between registration messages occurs and resolves the most recent location of a mobile node. A third aspect of the invention relates to a method for detecting whether a binding cache entry for a mobile at a correspondent node has been spoofed and to a method for registering a care-of address of a mobile node at a correspondent node. | 11-25-2010 |
20110122815 | INFORMATION EXCHANGE BETWEEN GATEWAYS FOR ROUTE OPTIMIZATION WITH NETWORK-BASED MOBILITY MANAGEMENT - The invention relates to a method for informing two access gateways about each other's presence and identity, in order to establish a data path between them, thereby shortening the overall data path of data packets exchanged between two mobile nodes (MN), that are located in different networks. In particular, each access gateway is provided with the other gateway's address and additionally with the other MN's address for forwarding by the access gateway those data packets destined to the other MN to the other access gateway. A combination of Session Initiation Protocol messages (Invite and Ringing) and route optimization messages are used, so as to confer the information on the gateway's ID and MN's address to the gateways. | 05-26-2011 |
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 |
20120044949 | ROUTE OPTIMIZATION OF A DATA PATH BETWEEN COMMUNICATING NODES USING A ROUTE OPTIMIZATION AGENT - The invention relates to optimizing a data path between two communication nodes. A route optimization agent (ROA) is determined in the current network of the second communication node, preferably on the data path between the two communication nodes. Then, an IP tunnel is established between the first communication node and the ROA, the IP tunnel and the corresponding security association of said IP tunnel being based on the home address of the first communication node in its home network. The first communication node may have two IP tunnels based on the same home address, one to its home agent and one to the ROA. Corresponding routing entries and binding cache entries need to be established in the ROA and the first communication node so that all data packets between the two communication nodes are exchanged via the established IP tunnel over the ROA. | 02-23-2012 |
20120164979 | INTER-VPLMN HANDOVER VIA A HANDOVER PROXY NODE - The invention relates to a method for performing a handover of a mobile node (MN) from a source to a target network, wherein a handover proxy node (HPN) is used to relay the handover of the MN to one of previously measured cells. The MN discovers an appropriate HPN and triggers the handover to the HPN by reporting the measurements together with the HPN ID as destination of the handover. When receiving the Handover Initiation message for handing over the MN to the HPN, the HPN will not proceed with the handover but adapts said handover to indicate a handover of the MN from the HPN to the target base station. Upon receiving the Handover Initiation message in the target network, system resources are configured for data forwarding between the source and target network, and for the data path used by the MN when attaching to the target base station. | 06-28-2012 |
20120269167 | ENHANCED ATTACHMENT PROCEDURE FOR ATTACHING A UE TO A 3GPP ACCESS NETWORK - The invention relates to methods for (re)attaching a UE to a 3GPP access network and for storing bearer context information of a UE upon handover from a 3GPP access network to a non-3GPP access network. Furthermore, the invention relates to 3GPP network nodes, such as mobility management entity, serving gateway and packed data gateway, and a UE that are specially adapted to perform these methods. In order to decrease of the delay time during (re)attachment of a UE to a 3GPP access network, the invention proposes to maintain context information on data bearer(s) of a UE within the 3GPP access network and the UE, while the UE is not attached to the 3GPP access network, so that data bearer context information for this UE is available and can be used for the (re)activation of data bearer(s) once the UE is attaching to the 3GPP access network again. | 10-25-2012 |
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 |
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 |