Nec Corporation

Jun Awano

Stefan Schmid

Marco Liebsch

Toshiyuki Tamura

Makoto Fujinami

A packet forwarding node includes a storage unit to store a packet forwarding table used for forwarding a packet based on an identifier which identifies a link between nodes on a packet forwarding path and a forwarding unit to receive an incoming packet including a plurality of the identifiers, and to forward the incoming packet based on an identifier corresponding to the packet forwarding node.

Communication system, forwarding node, path management server, communication method, and program

A control method and device, as well as a system, are provided that make it possible to perform relocation at an appropriate timing without impairing a user's sensory feeling about use of a service. A relocation control devicethat controls relocation of a packet network gatewaywhich provides functionality as an anchor for ensuring mobility of a mobile terminal in a mobile communication system, includes a bearer information acquisition sectionthat, when an occasion for relocation arises, acquires information to obtain importance and a use state of a communication between a mobile terminaland the packet network gateway, and a relocation determination sectionthat determines whether or not to perform relocation, based on the importance and the use state of the communication.

Gateway relocation control method and control device in mobile communication system

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 base station apparatus includes a first identification information acquisition unit for acquiring first identification information for identifying a terminal, the terminal being under management of the base station apparatus, a second identification information generation unit for generating second identification information associated with the first identification information acquired by the first identification information acquisition unit, and a terminal identification information notification unit for notifying an external device of the second identification information generated by the second identification information unit as information for identifying the terminal. An external apparatus is notified of identification information generated based on highly confidential first identification information within a base station, so that personalization can be feasible between a terminal and the external apparatus.

Base station apparatus and communication system

A pass-through packet determination unit () of an anchor GWA controls whether or not to transfer a Layer 3 packet arriving from an external network () to a downlink channel set up with a mobile terminal () based on a transfer policy. Further, a transfer policy control unit () changes the transfer policy to enable transfer of a multicast packet or a broadcast packet to the mobile terminal () by the downlink channel in response to receiving from the mobile terminal () a Layer 3 packet preliminarily specified as a trigger to start transfer of a multicast packet or a broadcast packet to the mobile terminal () by the downlink channel.

Gateway device, mobile communication system, mobile terminal, packet transfer control method, control method of mobile terminal, and non-transitory computer readable medium

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.

Provided is a home network system in which an appropriate mobility anchor is allocated for a mobile node and the number of mobility anchors can be reduced. A subscriber information accumulation server () accumulates first communication load prediction data for each time of a mobile node (). An anchor information accumulation server () accumulates second communication load prediction load for each time of each mobility anchor (). When 'a mobility anchor allocation request' is transmitted from the mobile node () to an anchor allocation server (), the anchor allocation server () adds the first communication load prediction data and the second communication load prediction load data so as to obtain third communication load prediction data. Among a plurality of mobility anchors (), a mobility anchor in which the third communication load prediction data is not greater than the load upper limit value at all the times and the maximum value of the second communication load prediction data is minimum is selected and allocated.

Home network system and mobility anchor allocation method used in the home network system

A communication system includes transfer nodereceiving a registration request signal from mobile nodeand serverreceiving the registration request signal from transfer node. Transfer nodedetermines, depending on the type of a transmission trigger for the registration request signal occurred, whether or not the number of mobile nodes which will be registered or which will have registration expiry time postponed are a plurality. If the plurality of mobile nodes are not to be processed, transfer nodetransmits a registration request signal for one mobile node to server. If the plurality of mobile nodes are to be processed, transfer nodetransmits an aggregation registration request signal concerning the plurality of mobile nodes, to server. Serverexecutes a process of registering or postponing the mobile node or the plurality of mobile nodes according to signal received from transfer node

Communication system, transfer node, mobile node, server apparatus, communication control method, and program

A communication system comprises a path management server that configures forwarding path information that is configured by arranging link IDs for identifying communication interfaces provided in respective forwarding nodes in a forwarding path of a data transfer network or links extending between said respective forwarding nodes and neighboring nodes thereof. For packets to which is added a header containing the forwarding path information, a forwarding node performs packet forwarding processing in accordance with the forwarding path information.

A communication system () includes an anonymizing device () and a server (). The anonymizing device () generates an anonymous address based on a prefix acquired from the server (), receiving a packet transmitted from a communication node (), rewrites a source address of the received packet into an anonymous address, encapsulates the received packet, and sends the packet to a second network () using the address of the anonymizing device () as a source address of the encapsulated packet and the address of the server () as a destination address. Then, receiving the encapsulated packet transmitted from the anonymizing device (), the server () decapsulates the encapsulated packet and sends the packet to the second network (). High anonymity can be thereby assured.

Anonymization using anonymizing device and packet server in which anonymous address is generated based on prefix acquired from server

The object of the present invention is to provide a mobile terminal management system in which a mobile terminal can rapidly decide a PMIP operation or CMIP operation in accordance with the policy of a network administrator. According to the present invention, a network notifies a mobile terminal whether or not the mobile terminal is operable with the PMIP function. Moreover, the mobile terminal of the present invention transmits, to the network, notification saying that a use request for CMIP function has been stored in accordance with the policy of a terminal side, such as user setting or service contents, upon connection or hand-over to the access network.

Mobile terminal management system, network device, and mobile terminal operation control method used for them

A home network system in which an appropriate mobility anchor is allocated for a mobile node and the number of mobility anchors can be reduced. A subscriber information accumulation server accumulates first communication load prediction data for each time of a mobile node. An anchor information accumulation server accumulates second communication load prediction load for each time of each mobility anchor. When 'a mobility anchor allocation request' is transmitted from the mobile node to an anchor allocation server, the anchor allocation server adds the first communication load prediction data and the second communication load prediction load data so as to obtain third communication load prediction data. Among a plurality of mobility anchors, a mobility anchor in which the third communication load prediction data is not greater than the load upper limit value at all the times and the maximum value of the second communication load prediction data is minimum is selected and allocated.

An image encoding apparatus includes a quantization control section that supplies a rounded Q-scale to a quantization section for quantizing each macroblock according to the rounded Q-scale. A Q-scale is generated for each macroblock based on the amount of generated codes produced by encoding. The Q-scale is rounded within a set range by a rounding control section. The rounded Q-scale is smaller in amount than the Q-scale. Since the same Q-scale values will continue in succession, these can be omitted from a stream, allowing the reduced amount of quantization information and the increased amount of information allocated to images.

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Tokyo, Japan

Jun Awano