Nec Corporation

Nec Europe Ltd.

Stefan Schmid

Toshiyuki Tamura

Tarik Taleb

Hajime Zembutsu

Gottfried Punz

Thilo Ewald

Anand Raghawa Prasad

Marco Liebsch

Andreas Kunz

Jun Awano

Frank Zdarsky

Andreas Maeder

Saverio Niccolini

Marcus Brunner

Bernd Lamparter

Marcus Schoeller

Paulo Ferrer Loureiro

Patrick Stupar

Sabah Al Sabea

Pierre Imai

Eskindir Asmare

A mobility management system in which mobility management for a mobile terminal is performed, including a plurality of mobility anchor nodes configured to communicate with an external network; an access gateway configured to communicate with the mobile terminal and the plurality of anchor nodes, and configured to send, to at least one of the mobility anchor nodes, a packet being relayed between the mobility terminal and the external network; and a control unit having at least one hardware processor configured to execute modules to control the access gateway to switch a destination mobility anchor node of the packet.

Mobility management system, mobility management method, access GW apparatus, mobility management control apparatus, and computer-readable medium

A communication method in LIPA/SIPTO architecture is provided which, when a user equipment (UE) is to connect from a serving area to an external network, allows re-selection of an optimal gateway. The communication method allows selecting a gateway apparatus physically or topologically close to a site, where the user equipment is attached.

Communication system and communication controlling method

A protection against an unsolicited communication for an IMS (PUCI) system includes a call session control function (CSCF), and a plurality of PUCE application servers. The PUCI application servers make an evaluation as to whether a communication received from the user equipment is an unsolicited communication; the CSCF makes a decision on routing toward the PUCI application servers based on the evaluation; then, the PUCI application servers execute the routing based on the decision.

Protection against unsolicited communication for internet protocol multimedia subsystem

An access gateway (GW) receives, from a mobility management node, a transmission-path control signal for changing a route of only part of a data packet flow that pertains to a mobile terminal and is originally relayed through the access GW and a first mobility anchor. In response to receiving the transmission-path control signal, the access GW establishes a logical transmission path with a second mobility anchor for transferring the part of the data packet flow, and transfers the part of the packet flow to the second mobility anchor and also transfers a remaining part of the packet flow to the first mobility anchor by distinguishing a data packet received from the mobile terminal.

To improve detection accuracy of SPIT, first, an identification information gathering apparatus receives various identification information from an IP phone terminal which has transmitted an INVITE message. A PUCI server generates bind identification information by binding or associating various identification information received from an identification information gathering apparatus via an SIP server and registers the bind identification information to a gray list stored in a list storing portion. A SPIT determination portion evaluates the bind identification information in reference to the gray list and determines whether or not the session start request from the IP phone terminal is allowed.

Malicious call detection apparatus, malicious call detecting method and computer program for detecting malicious calls

A PUCI system is designed to process an incoming call originated by the user equipment toward the counterpart user equipment via an EMS node having a PUCI-light functionality, which includes an IBCF/I-CSCF, a S-CSCF, and a database storing the PUCI-light information. Through a query to the database indicating a suspicious session in relation to the incoming call, the IMS node immediately blocks the suspicious session or simply marks the suspicious session for the further processing at a subsequent node. The reason for rejection is included in a SIP BYE/ERROR message of an original session setup message, which is interpreted by a previous IMS node so as to obtain the relevant information from a SIP header. The relevant information is stored in either a global operator policy database or a local database, thus enabling a PUCI-negating IMS node to reject an unsolicited call related to the blocked session.

A clustered femtocell network including a plurality of femtocell access points that are connected via a logical interface to a mobile network in order to provide user equipments with radio access to the mobile network, wherein the mobile network includes a Mobility Management Function&#x2014;MMF&#x2014;, is characterized in that a logical function&#x2014;Proxy Mobility Management Function P-MMF&#x2014;is provided that localizes mobility management of the user equipments in the clustered femtocell network, wherein the P-MMF intercepts and interprets mobility-related signaling between the MMF and the femtocell access points in such a way that it emulates towards the femtocell access points the behavior of the mobile network's MMF and towards the mobile network's MMF the behavior of the femtocell access points. Furthermore, a method for operating a clustered femtocell network is disclosed.

Apparatus and method for local mobility management in a clustered femtocell network

A method for supporting quality of service (QoS) mechanisms during a handover process or in preparation of a handover process, wherein a user equipment (UE) attaches to an access network (AN) via points of attachment (PoA), wherein the handover process supports changing connection of the UE from one of the points of attachment&#x2014;current PoA&#x2014;to another one of the points of attachment&#x2014;target PoA&#x2014;while maintaining all ongoing connections of the UE, wherein signalling messages are exchanged between the current PoA and a second PoA during or in preparation of the handover process, the second PoA including the target PoA or a candidate for the target PoA, and wherein the AN supports inner QoS mechanisms on a communication path within the AN, the communication path being used for communication between one of the PoA and a core network (CN) or between one of the PoA and a network entity within the AN, is characterized in that a triggering message is sent to the second PoA by the current PoA, the triggering message being received by an UE proxy located on the second PoA, wherein the UE proxy, in reaction to the triggering message, controls the inner QoS mechanisms to ensure QoS on the communication path.

Method for supporting quality of service mechanisms during a handover process or in preparation of a handover process

A method for detecting attacks to multimedia systems, wherein a communication path (1) is established within the multimedia system by a multimedia communication flow between a communication source and a communication destination, is characterized in that at least two devices (3, 4, 8) are provided along the communication path (1), each the device (3, 4, 8) acting as inspection device (2) that is enabled to inspect the multimedia communication flow that transits the inspection device (2), and that the results of the single inspections are accumulated along the communication path (1). Furthermore, a multimedia system with attack detection functionality is described.

Method for detecting attacks to multimedia systems and multimedia system with attack detection functionality

A method for facilitating communication in a mobile communication system in which address-delegating entities are involved, wherein mobile nodes attaching to the communication system get assigned an address or address prefix, wherein the address or address prefix assignment is delegated from an entity being associated with mobility management&#x2014;mobility entity&#x2014;to some other configuration component (), is characterized in that the configuration component (), upon being delegated by a mobility entity to assign a mobile node an address or address prefix, stores information about the delegating mobility entity. Furthermore, a corresponding mobile communication system with discovery functionality of address-delegating entities is disclosed.

Method for facilitating communication in a mobile communication system and mobile communication system

A reliable and flexible method for controlling traffic within a network structure without the addition of remarkable complexity to the core network is provided, the structure including a PDN (Packet Data Network), an operator core network with a DNS (Domain Name System) server, a HeNB (Home evolved Node B) or HNB (Home Node B) and/or eNB (Evolved Node B) or NB (Node B) and a UE (User Equipment) that is associated with the HeNB or HNB and/or eNB or NB. On the basis of a predefinable routing policy the DNS server is controlling whether a traffic from a UE to a destination address within a local network associated to the HeNB or HNB or eNB or NB or within a PDN and/or vice versa will be routed via the core network or directly via the local network in support of local network protocol access or selected network protocol traffic offload.

Method for controlling the traffic within a network structure and a network structure

A method for link quality estimation in a wireless network, is characterized in that nodes of the wireless network perform the steps of sending packets to other nodes, monitoring all packets received from other nodes being located within their communication range, and calculating sent-received ratios with respect to other nodes and deriving thereof a link quality towards the respective nodes.

Growing community of inventors

Heidelberg, Germany

Stefan Schmid