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| Number | Title | Issue Date |
| 8107461 | SIP exchange system The total system, which is operated by SIP (Session Initiation Protocol) call sequence and SIP call replacement sequence, comprises control part which includes sequence part for immediately performing the SIP call replacement sequence upon detecting communication of... | 01/31/2012 |
| 8036607 | Wireless terminal and wireless base station In a case where a switching source wireless communication system is a wireless communication system in which a transmission timing of a packet or data rate can be controlled in a wireless base station, the switching source wireless communication system, which notifi... | 10/11/2011 |
| 7996033 | Radio communication system and base station A radio communication system includes a grouping unit for grouping a plurality of base stations into a plurality of groups (Soft Handoff Groups) and a determining unit for selecting base stations belonging to one and the same group selected from the groups produced ... | 08/09/2011 |
| 7830924 | Stuffing and destuffing operations when mapping low-order client signals into high-order transmission frames A unit timing signal synchronized with a high-order transmission frame is used for measuring a difference between the number of data pieces of a client signal mapped to the high-frequency frame and the number of data pieces of the output client signal by integrating... | 11/09/2010 |
| 7796741 | Call connection control unit and call connection control method The invention provides a call connection control method which can use a conventional telephone as-is and performing linking with a low possibility of mistaking telephones, and a call connection control unit for implementing the method. Upon receiving an outgoing cal... | 09/14/2010 |
| 7756057 | Method and apparatus for determining transmission rate based on number of unused slots A radio communication terminal, being used in a radio communication systems in which the transmission rate varies depending on radio wave conditions and communication statuses of other users, comprises a reception module which receives packets transmitted by a base ... | 07/13/2010 |
| 7751394 | Multicast packet relay device adapted for virtual router An object of the present invention is to solve a problem that when multicast is utilized in a network configured with virtual routers, traffic in the relay network is increased. According to the present invention, the number of multicast packets via the relay networ... | 07/06/2010 |
| 7729699 | Switching center for mobile handover In a mobile communication system having an ATM-processed transfer path, a non-instantaneous interrupt handover can be realized. In a mobile communication network including an ATM-processed transfer path, when a mobile station is moved between cells during communicat... | 06/01/2010 |
| 7680414 | Passive optical network system and operating method thereof A Passive Optical Network system implementing a parent station capable of receiving high-speed burst signals transmitted from a plurality of subsidiary stations to a parent station, with excellent bandwidth utilization efficiency in the link from the stations to the... | 03/16/2010 |
| 7676127 | Optical communication system using WDMA and CDMA In a PON system, an OLT periodically transmits a channel resource information block specifying a carrier wavelength and a spreading code on a first downstream channel to which a spread-spectrum spreader having a first spreading code is applied; one of ONUs receives ... | 03/09/2010 |
| 7664398 | ONU management method and optical line termination In a PON system, a PON-ID assigned to a connected ONU before replacement is assigned to a newly connected ONU after the replacement and, setting data before the replacement is succeeded also after the replacement. An OLT includes a PON-ID state where a management st... | 02/16/2010 |
| 7656872 | Packet forwarding apparatus and communication network suitable for wide area Ethernet service L2TP packet forwarding apparatus to be connected to at least two LACs (L2TP Access Concentrators) via L2TP sessions to receive packets transmitted from a gateway, which accommodates user terminals, in the form of a L2TP packet encapsulated in Bridge over PPP, has a ... | 02/02/2010 |
| 7653311 | Optical wavelength add-drop multiplexer Part of an inputted optical add signal 118 is reflected by a mirror 117, and is thereby inputted into an optical wavelength multiplexer 105 in the reverse direction so that the optical add signal is returned to paths 115-1 through ... | 01/26/2010 |
| 7653310 | Wavelength division multiplex (WDM) transmission system A low-cost configuration of, and at the same time to control the variable dispersion compensator at a high speed in a variable dispersion compensator for compensating the wavelength dependent accumulated dispersion resulting from the wavelength dependency of the tra... | 01/26/2010 |
| 7650075 | Optical add-drop multiplexer, and optical network equipment using the same Heretofore, it was necessary to individually locate an optical switch, an optical switch control circuit, and the like, before and after an optical transceiver that performs optical protection. As a result, costs and the space for implementation increase, and a dela... | 01/19/2010 |
| 7649890 | Packet forwarding apparatus and communication bandwidth control method In a network for forwarding user packets by a tunneling protocol, an egress edge node to which tunnels concentrate from a plurality of ingress edge nodes allocates a bandwidth to each of sessions multiplexed through each of the tunnels and notifies each of the ingre... | 01/19/2010 |
| 7647039 | Wireless communication apparatus, wireless communication network and software upgrading method A base station control portion selects one or multiple signals in accordance with the state of radio waves from signals received through multiple communication paths. A wireless communication apparatus communicates with a wireless terminal and a wired communication ... | 01/12/2010 |
| 7643421 | Packet forwarding apparatus A BAS/load balancer which combines the functions of a BAS (Broadband Access Server) providing a dynamic network connection to a user network, and a load balancing relaying the communications traffic of the user network to one of plural load balancing target apparatu... | 01/05/2010 |
| 7640013 | Wireless communication apparatus, wireless communication network and software upgrading method A base station control portion 200 selects one or plural signals from signals received by plural settable communication paths in accordance with the state of the wave. A wireless communication apparatus 110 communicates with a wireless terminal 300 | 12/29/2009 |
| 7639984 | Wireless communication system A wireless communication which suppresses radio interference between wireless base stations and improves the channel efficiency is implemented. In the wireless communication system including a central base station, a plurality of remote base stations having a direct... | 12/29/2009 |
| 7636879 | Error correction decoder An error correction decoder possessing a decoding method with high error correction performance and capable of operating at a low operating frequency and on a reduced circuit scale. A decoding method based on the SOVA method for improving error correction performanc... | 12/22/2009 |
| 7634278 | Wireless communication system and base station There is provided admission control in view of wireless resources. A base station 120 obtains a down wireless resource available rate (available rate of slot allocation) based on a down QoS requested bandwidth Bi requested by a terminal i during Qo... | 12/15/2009 |
| 7630637 | PON system and optical network unit Provided is an ONU that suppresses transmission of a useless multicast control message to a PON section and enables a communication bandwidth of the PON section to be effectively used. The ONU of the PON system has a multicast group management table that shows a cor... | 12/08/2009 |
| 7627298 | Wireless communication method with data rate selected based on interference A terminal 211 measures pilot signals transmitted in directional (beam) patterns from an adjacent cell and an own cell, and estimates reception qualities with the presence (high)/absence (low) of the interference from the adjacent cell. The terminal 211 | 12/01/2009 |
| 7626934 | Packet transfer apparatus A packet transfer apparatus has a controller for controlling transmission of a PADO packet on the basis of the information that is previously set in the packet transfer apparatus in order that the PADO packet can be transmitted back to the terminals or a PADI can be... | 12/01/2009 |
| 7620325 | Transmission apparatus with function of multi-step bandwidth assignment to other communication apparatuses A transmission apparatus for use in fixed bandwidth communications and variable bandwidth communications. The transmission apparatus has a memory unit, which stores information contained in a frame and indicating the amount of data to be transmitted from a terminal ... | 11/17/2009 |
| 7620074 | Communication system, master communication device, and slave communication device A communication system is provided which allows synchronous devices in different synchronous communication networks to have synchronous communications with one another via an asynchronous communication network. In the communication system of the present invention, a... | 11/17/2009 |
| 7620002 | Apparatus and method for controlling multiplex number in spatial domain This invention provides a controller of multiplex number in spatial domain that collects from a plurality of radio communication apparatuses the number of terminals connected thereto and the multiplex number in spatial domain, determines the ratio of (the number of ... | 11/17/2009 |
| 7616645 | Frame forwarding apparatus for converting VLAN identifiers A frame forwarding apparatus is provided with a frame forwarding processing unit for converting a VLAN ID of a frame received from one subscriber terminal into a group VLAN ID and converting a group VLAN ID of a frame received from an ISP router into a subscriber VL... | 11/10/2009 |
| 7616615 | Packet forwarding apparatus for connecting mobile terminal to ISP network A packet forwarding apparatus enabling selective provider type access service in a mobile communication network, including a first group of line interfaces connected to routers deployed to service areas of a mobile network, a second group of line interfaces connecte... | 11/10/2009 |
| 7616567 | Shaping apparatus, communication node and flow control method for controlling bandwidth of variable length frames A shaping apparatus comprising a plurality of buffer memories allocated for different flows, bandwidth control units associated with the buffer memories, and a read control unit, wherein each of the bandwidth control units issues a first frame output request based o... | 11/10/2009 |
| 7616318 | Apparatus for measuring waveform of optical electric field, optical transmission apparatus connected thereto and a method for producing the optical transmission apparatus An electric field waveform of an optical signal is precisely measured with high time resolution. Particularly, determination of inter-symbol interference has been difficult. Output light from the laser source is divided into first and second portions. The first port... | 11/10/2009 |
| 7610049 | Wireless communication system, server and mobile station therefor This invention provides a wireless communication system wherein a network to which a mobile station should be handed over can be selected, using parametric data collected from network components other than the mobile station. Time taken for a handover between differ... | 10/27/2009 |
| 7606491 | ONU management method and optical line termination In a PON system, a PON-ID assigned to a connected ONU before replacement is assigned to a newly connected ONU after the replacement and, setting data before the replacement is succeeded also after the replacement. An OLT includes a PON-ID state where a management st... | 10/20/2009 |
| 7602800 | PON system Disclosed herewith is a PON system and a bandwidth controlling method capable of controlling congestion with use of an upstream bandwidth in a PON section efficiently when congestion occurs in a gateway (GW) connected to an OLT. An OLT connected to a plurality of ON... | 10/13/2009 |
| 7599682 | Method of implementing multi-party conference service by using broadcast/multicast service of a wireless communications system This invention provides a method of implementing a multi-party conference service (MPCS) using broadcast/multicast service of a wireless communications system used for a conference focus, the context of a corresponding broadcast/multicast service session is generate... | 10/06/2009 |
| 7599660 | Base station apparatus and control method for controlling channel density A base station apparatus is provided for adaptively controlling a maximal accommodation channel number per unit area (for example, the coverage area of a cell or sector) in accordance with a traffic quantity without relying upon detachment of a mobile base station a... | 10/06/2009 |
| 7583659 | Media gateway and automatic telephone call redirecting service system A media gateway built in an exchange comprises a media gateway control unit connected to a control unit of the exchange, a first protocol processing unit for executing a call connection procedure according to a first call control protocol with an IP call connection ... | 09/01/2009 |
| 7580636 | Optical switch and method for controlling optical path thereof An optical switch is provided with: an optical matrix switch; and an optical path decision section which divides input light into two branches, supplies the input light of one divided branch to the optical matrix switch, demultiplexes the input light of the other di... | 08/25/2009 |
| 7577141 | Communication system An IPv4-IPv6 multicast address translation table is dynamically created, so that it is unnecessary to register multicast servers in advance. When an IPv4 MC group address exists as a response of a DNS server to a DNS request of an IPv6 MC client or when an IPv6 MC g... | 08/18/2009 |
