Patent application number | Description | Published |
20090059924 | PACKET TRANSMITTING METHOD, RELAY NODE AND RECEIVING NODE - A packet transmitting method wherein an explicit multicast packet can be transmitted with the consumption of communication bands of broadcast media being suppressed. According to this method, a link level multicast is used to transmit an explicit multicast packet only to next hop nodes that, even when receiving the explicit multicast packet through the link level multicast, will not output the same packet to the broadcast media, while a unicast is used to transmit an explicit multicast packet to the other next hop nodes. | 03-05-2009 |
20090116482 | MULTICAST DISTRIBUTION DEVICE AND MULTICAST DISTRIBUTION METHOD - Provided is a multicast distribution device for transmitting a packet in which a reception node can easily perform signal synchronization between a plurality of hierarchized data. The multicast distribution device ( | 05-07-2009 |
20090245252 | COMMUNICATION TERMINAL AND RETRANSMISSION REQUEST METHOD - A multicast communication system in which a receiving node which has detected a packet loss can make a retransmission request without applying a high load to a transmitting node, all receiving nodes, and the band of the entire network. The transmitting node transmits an explicit multicast data packet including an address list including a plurality of destination addresses and a bitmap indicating whether the data packet has been delivered to the respective destination addresses, to a plurality of the receiving nodes. The receiving node which has detected the packet loss checks an address list and bitmap of another data packet received and selects a receiving node to which the another data packet has been delivered as a retransmission requester. The receiving node which has detected the packet loss creates a unicast retransmission request packet with the selected receiving node as the destination and transmits it to the selected receiving node. | 10-01-2009 |
20110002333 | TERMINAL AND N-TREE CONSTRUCTING METHOD - A terminal apparatus is provided that minimizes traffic congestion by reducing end-to-end delay and maximizes the bandwidth available in shared N-tree ALM nodes. In this terminal apparatus, an optimal stream path information table ( | 01-06-2011 |
20110002334 | COMMUNICATION TERMINAL AND COMMUNICATION STATE CHANGE METHOD - A generating unit ( | 01-06-2011 |
20110064079 | COMMUNICATION CHANNEL BUILDING DEVICE AND N-TREE BUILDING METHOD - Disclosed is a communication channel building device which can guarantee a fair bandwidth allocation and exhibit a preferable perception AV quality in an ALM application. A transfer table building controller ( | 03-17-2011 |
20110110260 | STREAMING COMMUNICATION DEVICE, STREAMING COMMUNICATION METHOD, AND STREAMING COMMUNICATION SYSTEM - A streaming communication device which accurately estimates a packet which will be lost in the future. A streaming communication device which transmits or receives a stream via a router over a packet-switched network, the streaming communication device including: an accumulating unit ( | 05-12-2011 |
20110128958 | APPLICATION LAYER MULTICAST (ALM) TREE CONSTRUCTING APPARATUS, ALM TREE CONSTRUCTING METHOD, PROGRAM, AND INTEGRATED CIRCUIT - The ALM tree constructing apparatus ( | 06-02-2011 |
20110170417 | TRANSMISSION RATE CONTROL DEVICE AND TRANSMISSION RATE CONTROL METHOD - A first communication terminal which communicates with a second communication terminal through a best effort network includes: a communication history storage unit in which a communication history is stored for each of the communication terminals; and a round-trip delay time calculation unit which calculates a round-trip delay time that occurs in a communication with the second communication terminal. The second communication terminal includes a target loss event rate calculation unit which calculates a target loss event rate that is to be set by the first communication terminal in a communication with the second communication terminal, based on a past transmission rate that is recorded in the communication history and has been realized in the communication with the second communication terminal, and on the round-trip delay time that occurs in the communication with the second communication terminal. The first communication terminal changes a transmission rate which is set at the present time to a target transmission rate which is calculated based on the target loss event rate and the round-trip delay time. According to the transmission rate control device, when it is determined that the bandwidth that is estimated to be available in a communication through the network is rapidly changed, the transmission rate can be changed to a target bit rate in a short time period. | 07-14-2011 |
20110222431 | TRANSMITTING APPARATUS, RECEIVING APPARATUS, TRANSMITTING AND RECEIVING SYSTEM, AND TRANSMITTING AND RECEIVING METHOD - To provide a transmitting apparatus capable of accurately estimating an available bandwidth even in a high bandwidth in a network. The transmitting apparatus ( | 09-15-2011 |
20110243130 | TRANSMITTER TERMINAL AND RECEIVER TERMINAL - A problem of the invention is to provide a transmitter terminal and a receiver terminal that can realize transmission of a real-time stream as the final transmission delay time is shortened by avoiding occurrence of reorder. In a transmitter terminal ( | 10-06-2011 |
20110305169 | TERMINAL DEVICES AND PACKET TRANSMITTING METHOD - After a delivery tree is reorganized by a local processing, all terminal devices can recognize, in a short time, a delivery route as changed. In a local one of the terminal devices, if the local terminal device is a source node and further if the load of the CPU in any one of nodes exceeds a threshold value or the available band of the circuit line between nodes exceeds a threshold value, then a delivery tree organizing unit ( | 12-15-2011 |
20120063360 | PATH SETTING DEVICE AND PATH SETTING METHOD - Disclosed is a path setting device capable of setting a distribution path of packets more speedily, when the originator of information is switched. The terminal ( | 03-15-2012 |
20120128002 | TRANSMITTING TERMINAL AND BANDWIDTH ESTIMATING METHOD - A transmitting terminal for used in a communication system having the transmitting terminal and receiving terminals which are connected to each other in a tree shape, each of the receiving terminals copies the data transmitted from the transmitting terminal and transfers the copied data to a receiving terminal in downstream, includes a receiving section that receives a receiver report including a packet loss rate and a round trip time, a bandwidth estimation target terminal selection section that selects a receiving terminal to be estimated on the basis of distribution tree information and a packet loss rate included in the receiver report, and a bandwidth estimation section that estimates a bandwidth of the network to control a transmission rate of data on the basis of the packet loss rate and the round trip time included in the receiver report transmitted from the selected receiving terminal. | 05-24-2012 |
20120158818 | COMMUNICATIONS TERMINAL, COMMUNICATIONS METHOD, AND PROGRAM AND INTEGRATED CIRCUIT FOR COMMUNICATION - A communication terminal ( | 06-21-2012 |
20120198060 | NETWORK DELAY ESTIMATION APPARATUS AND A NETWORK DELAY ESTIMATION METHOD - A network delay estimation apparatus capable of creating a metric tree with high accuracy and in a short time. Network delay estimation apparatus ( | 08-02-2012 |
20130142243 | TRANSMITTING DEVICE, TRANSMITTING METHOD, INTEGRATED CIRCUIT, AND PROGRAM - A transmitting device can suppress degradation of the video quality and determine a proper transmission rate, and include a transmitting unit that transmits a communication packet to a receiving device, a receiving unit that receives a feedback packet, which is a response signal corresponding to the communication packet, from the receiving device, a detecting unit that detects a change of a reception interval of the feedback packet, and a transmission rate determining unit that decreases a transmission rate at which the transmitting unit transmits the communication packet in the case where the change of the reception interval is detected, and increases the transmission rate on the basis of an amount of change of a travelling speed of at least either the transmitting device or the receiving device before and after the decrease in the transmission rate. | 06-06-2013 |
20130159475 | COMMUNICATION TERMINAL, COMMUNICATION CONTROL METHOD, AND PROGRAM - A communication terminal capable of seamless reproduction of stream data even when structure of an ALM tree changes during the reproduction of stream data includes a control unit which causes a reproduction unit to start reproduction of a stream data packet at a time point which is later than a predetermined time point by a total of all delay times corresponding to a communication path from the communication terminal to a leaf terminal. The delay times are obtained by an obtainment unit. | 06-20-2013 |
20130215789 | COMMUNICATION TERMINAL AND CLUSTER MONITORING METHOD - It is an object to provide a communication terminal capable of determining a cluster formation so as to promptly perform addition of a participant terminal, while maintaining the quality of a stream relay path. Cluster monitoring terminal ( | 08-22-2013 |
20140362690 | COMMUNICATION APPARTUS, COMMUNICATION METHOD, AND PROGRAM - A communication apparatus includes a packet output unit that performs normal transmission of a normal packet and retransmission of at least one retransmission packet, a feedback receiver that receives a retransmission request that designates a retransmission packet to request retransmission, and a controller that determines that the retransmission packet for the received retransmission request is to be transmitted or is scheduled to be transmitted based on an amount of data scheduled to be transmitted for a predetermined period. | 12-11-2014 |
Patent application number | Description | Published |
20090285211 | COMMUNICATION METHOD AND RECEIVING TERMINAL - It is an object of the present invention to receive/play a streaming immediately after a switching not to disconnect it when a terminal for receiving the streaming is switched from a first receiving terminal to a second receiving terminal | 11-19-2009 |
20100031109 | RECEIVING TERMINAL AND RECEIVING METHOD - A receiving terminal is provided that prevents a load on a network near a receiving terminal from increasing when a retransmission request is made to a plurality of other terminals, and enables the probability of being able to compensate for a lost packet by means of a retransmission packet to be increased. In a receiving terminal that transmits a retransmission request for compensating for a lost packet lost in a network, a measurement section measures a time period corresponding to a distance in the network between the receiving terminal and a plurality of receiving terminals, a calculation section calculates for each of the receiving terminals a float (spare time period) found by subtracting the current time and a time period measured by the measurement section from a playback time at which a retransmitted packet is played back, and a decision section decides retransmission request transmission timing and a retransmission request transmission destination for each of the receiving terminals based on the calculated floats. | 02-04-2010 |
20100074113 | FLOW CONTROL METHOD, TRANSMITTING TERMINAL DEVICE USED IN SAME, RECEIVING TERMINAL DEVICE AND PACKET TRANSFER SYSTEM - It is an object to provide a flow control method in which a packet round trip time is not excessively calculated out and its performance is not unnecessarily deteriorated even at the time of continuously connected packet transfers through relays of a plurality of receiving terminal devices. This method is directed to a flow control method in which the delivery of packets are carried out through relays of a plurality of receiving terminal devices. The method is comprised of steps (S | 03-25-2010 |
20100157795 | TRANSMITTING APPARATUS AND TRANSMISSION RATE CONTROL METHOD - In a communication of explicit multicast system used in SICC, the frequency of variation of the transmission rate is reduced to achieve a multimedia data transmission exhibiting a high quality. An available bandwidth estimating part ( | 06-24-2010 |
20100158000 | TRANSMITTING APPARATUS AND TRANSMITTING METHOD - To transmit multimedia data in such a manner that is adaptive to the transmission, capability of a receiving apparatus and/or to the congestion state of a network. In a transmitting apparatus ( | 06-24-2010 |
20100183012 | DATA TRANSMITTING APPARATUS AND DATA RETRANSMITTING METHOD - A data transmitting apparatus is provided for making it possible to send out a retransmitting packet at early timing even in the case where a delivery tree structure is unclear. A transmitting terminal device ( | 07-22-2010 |