Abstract: A wireless terminal for transmitting data to a base station with placing the data on a plurality of subcarriers, the wireless terminal includes: an antenna; and a processor configured for controlling the antenna to transmit, to the base station, a request signal for requesting an access right with placing the request signal on a predetermined number of subcarriers; and controlling the antenna to transmit, to the base station, a request message for requesting a communication resource being transmitted by subcarriers whose number is less than the predetermined number, to use the access right assigned by the base station with respect to the request signal when the wireless terminal has transmission data; wherein the processor is configured to control the antenna to transmit the request message to the base station when the level of communication with the base station is lower than a threshold value.

Abstract: A radio communication apparatus including: a radio interface; and a processor configured to control the radio interface to transmit a Ranging signal to a base station and to control a transmission power level of the Ranging signal; when the processor controls the radio interface to retransmit the Ranging signal, the retransmission includes a first phase and a second phase, the first phase in which the processor controls the radio interface to retransmit the Ranging signal at substantially a same transmission power level as at the time of initial transmission, or performs substantially a same calculation as that made at the time of the initial transmission of the Ranging signal and retransmits the Ranging signal at the calculated transmission power level, the second phase in which the processor increases the transmission power level and retransmits the Ranging signal at the increased transmission power level.

Abstract: A wireless communication terminal apparatus communicates with a wireless base station wirelessly. The wireless communication terminal apparatus includes a wireless communication unit and a control unit. The wireless communication unit communicates wirelessly. The control unit transmits a search request, in which search duration for searching a wireless base station is included, from the wireless communication unit to a wireless base station during connection, and when a search response is received in the wireless communication unit from the wireless base station during connection, suspends at least a transmitter in the transmitter and a receiver of the wireless communication unit in all or a part of the search duration.

Abstract: A radio terminal includes a first part that has a first gain switchable between first and second levels, a second part that continuously controls a second gain, and a control part. A first range of the combined gain of the first and second gains obtained by the second part with the first gain set at the first level and a second range of the combined gain obtained by the second part with the first gain set at the second level have at least an overlap. The control part switches the first gain from one to the other of the first and second levels if the combined gain is within the overlap and a change in the combined gain exceeds a predetermined value, or if the combined gain is within the overlap and the radio terminal is in a period of no transmission or reception in intermittent transmission or reception.

Abstract: A terminal device directly communicates with a base station by using a WiMAX™ connection. If the user moves the terminal device and switches from the direct wireless connection established with the base station to a relayed connection established with the base station via a relay device, the terminal device sends a connection request to the relay device. When a connection request is received from the terminal device, the relay device switches the connection between the terminal device and the base station to a WiMAX connection, established via the relay device. Once the relayed connection is established between the terminal device and the base station, the relay device relays data between the terminal device and the base station, using a Wi-Fi connection between the relay device and the terminal device, and using the WiMAX connection between the relay device and the base station.

Abstract: At the time of exchanging routing information of a remote site, it is examined whether there is duplicated routing information, and when the duplicated routing information exists, an address conversion rule is generated. With this, when performing communication, address conversion is performed only for the communication to a site having a duplicated network address. In case of communication to a site having no duplicated network address, by performing IP communication intact, it becomes possible to omit unnecessary address conversion processing in a gateway. Also, when there is a duplicated address, by assigning a new network address which is not used in a site under a gateway to the duplicated address included in the routing information, and distributing the newly assigned address, it becomes possible to transmit a packet to a gateway appropriate to each destination, when there are a plurality of gateways in a subnet.

Abstract: A communication apparatus includes a controller configured to control transmission of a bandwidth request message, the transmission being triggered by a detection of connection establishment between the communication apparatus and a destination apparatus in a layer that is higher than a media-access control layer; and a transmitter configured to transmit the bandwidth request message in accordance with a control of the controller.

Abstract: A community control server stores in a community defining table, data of a correspondence between Interior Gateway Protocol (IGP) routers that are connected to a community and another community. The community control server collects prefix data that is included in routing information that is received by the IGP routers and identification data of the IGP routers. Based on the community defining table and the identification data, the community control server detects a community corresponding to a prefix. Upon receiving data of whether to transmit the routing information in the form of the permission to distribute them between communities, based on data of the community the community control server determines the prefix corresponding to the source community and transmits the prefix data to the IGP routers.

Abstract: The hierarchical packet processing system comprises a relay unit and a server, which relay received packets. The relay unit comprises a call unit for calling up a prescribed service processing unit for performing the service process of a received packet, a first service processing unit for performing the service process of the received packet by the call of the call unit, a second service processing unit for performing a virtual service process of the received packet by the call of the call unit. The server comprises an external service processing unit for performing the arbitrary service process of the received packet instead of the second service processing unit when the call unit calls up the second service processing unit.

Abstract: Configuration information set in one virtual path configuration apparatus is shared with all the virtual path configuration apparatuses in the virtual private network. The configuration information may be shared by transmitting the configuration information to other virtual path configuration apparatuses or receiving configuration information from the other virtual path configuration apparatuses.

Abstract: To prevent throughput reduction during handover, the wireless communication system includes a wireless terminal and a plurality of wireless base stations communicating wirelessly with the wireless terminal and performs control to lower the speed at which the wireless terminal communicates with a communication party upon time-out of a timer value generated in accordance with the time required for transmission/reception of a signal between the wireless terminal and a communication party, wherein the wireless base station performs the control to lower the speed of the communication with the wireless terminal so as to increase the timer value when the wireless base station decides execution of the handover of the communication with the wireless terminal to another wireless base station autonomously or in response to a request from the wireless terminal, and subsequently, executes the handover.

Abstract: A control device includes a virtual IF set to associate with address information of an interface on a forwarding device and, when detecting that an application section accesses the virtual IF, requests the forwarding device to set a packet transfer rule for transferring a packet received on an interface to the control device while making the packet associate with the virtual IF. The forwarding device sets the packet transfer rule requested by the control device.

Abstract: A radio terminal includes a first part that has a first gain switchable between first and second levels, a second part that continuously controls a second gain, and a control part. A first range of the combined gain of the first and second gains obtained by the second part with the first gain set at the first level and a second range of the combined gain obtained by the second part with the first gain set at the second level have at least an overlap. The control part switches the first gain from one to the other of the first and second levels if the combined gain is within the overlap and a change in the combined gain exceeds a predetermined value, or if the combined gain is within the overlap and the radio terminal is in a period of no transmission or reception in intermittent transmission or reception.

Abstract: In a network apparatus including a forwarding unit corresponding to a base point for conducting packet transmission/reception with an external network, and plural control units for operating plural applications that are arranged to access virtual interfaces of the control units that correspond to actual interfaces of the forwarding unit so that the network apparatus appears from the outside to be functioning as a single unit. A routing process of generating a routing table is executed at a master control unit corresponding to one of the control units, and if the routing table of the master control unit is updated, a routing table of the forwarding unit is updated by a routing synchronization process that operates independently from the routing process. One or more routing tables of one or more slave control units corresponding to the control units other than the master control unit are updated through the forwarding unit.

Abstract: A packet processing system including a forwarding apparatus that sends and receives a packet by using a network interface and a control apparatus that includes an application receiving the packet is provided. The control apparatus includes: a symbol part corresponding to the forwarding apparatus; and a transfer control part for sending a request message, to the forwarding apparatus, requesting the forwarding apparatus to set a packet transfer rule for transferring a receiving packet to the application; and the forwarding apparatus includes: a transfer control part for setting the packet transfer rule as requested by the request message; wherein the packet transfer rule includes an interface identifier corresponding to the communication port; and when the control apparatus detects that the interface identifier is changed, the control apparatus sends a correction message, to the forwarding apparatus, requesting the forwarding apparatus to correct the interface identifier in the packet transfer rule.

Abstract: A first edge node in an MPLS network system includes a generation module generating a key value for determining an allocating destination link in a way that uses, as input values, a piece of source identifying information and a piece of destination identifying information contained in a header of a forwarding target frame before being attached with an MPLS header enabling the frame to be forwarded across an MPLS network on the basis of an MPLS protocol, an embedding module embedding the key value generated by the generation module into a specified field in the MPLS header, and a transmitting module transmitting the MPLS frame containing the key value embedded into the specified field in its MPLS header to the MPLS network.

Abstract: A community control server stores in a community defining table, data of a correspondence between Interior Gateway Protocol (IGP) routers that are connected to a community and another community. The community control server collects prefix data that is included in routing information that is received by the IGP routers and identification data of the IGP routers. Based on the community defining table and the identification data, the community control server detects a community corresponding to a prefix. Upon receiving data of whether to transmit the routing information in the form of the permission to distribute them between communities, based on data of the community the community control server determines the prefix corresponding to the source community and transmits the prefix data to the IGP routers.

Abstract: A virtual interface having a global address of a physical interface on an Internet side of a gateway is provided in a terminal. An application unit of the terminal transmits a packet to the Internet using the virtual interface. The packet is transferred to the gateway through a downlink transfer path. The gateway transmits the packet from the physical interface on the Internet side to the Internet.

Abstract: At the time of exchanging routing information of a remote site, it is examined whether there is duplicated routing information, and when the duplicated routing information exists, an address conversion rule is generated. With this, when performing communication, address conversion is performed only for the communication to a site having a duplicated network address. In case of communication to a site having no duplicated network address, by performing IP communication intact, it becomes possible to omit unnecessary address conversion processing in a gateway. Also, when there is a duplicated address, by assigning a new network address which is not used in a site under a gateway to the duplicated address included in the routing information, and distributing the newly assigned address, it becomes possible to transmit a packet to a gateway appropriate to each destination, when there are a plurality of gateways in a subnet.

Abstract: In a packet data processing apparatus for processing a packet received from a network by a processor, a packet data access part includes a plurality of registers arranged in series and sequentially shifts the received packet through the plurality of registers toward an outlet of the packet data access part in synchronization with a clock. The processor processes the received packet by accessing the packet data access part while the received packet is being shifting through the plurality of registers.