Patent application number | Description | Published |
20090080424 | PACKET COMMUNICATION SYSTEM WITH QOS CONTROL FUNCTION - A packet communication system of the present invention has first mode, second mode and third mode to apply to input packets. The first mode is a mode that decides priority of the packet by at least one of the address information and the application information, the second mode is a mode that decides priority of the packet by the DS value, the third mode is a mode that decides rewrite the DS value by at least one of the address information and the application information. A control unit of the packet communication system switches a mode to apply an input packet of the first mode, the second mode and the third mode based on the packet header information of the input packet. | 03-26-2009 |
20100110889 | Policing device - A policing device having a table storing monitored bandwidth, packet history information for each importance level, and the allocation weight of the monitored bandwidth for each importance level, a policing table control circuit for reading out these items of information into each storage of a policing unit when a packet is inputted, and a calculation unit for judging the bandwidth of the input packet as being conformant or non-conformant to the contract on the basis of these items of information, thereby to control the bandwidth at each importance level. | 05-06-2010 |
20100232444 | FRAME TRANSFER METHOD AND FRAME TRANSFER DEVICE - Disclosed herewith is a network that can connect as many VPNs as possible to itself. In order to realize such a network, in the frame transfer method of the present invention, which enables a transfer path to be formed between nodes in the network so as to transfer frames, a terminal for transmitting frames or node located outside the transfer path, upon transmitting a frame through the transfer path, writes the transfer path selection information related to the transfer path and the output line information related to the output line from the terminating node of the transfer path in the frame according to the destination information set in the frame and transmits the frame to the destination. The starting node of the transfer path decides the transfer path used for transferring the frame according to the transfer path selection information set in the frame to transmit the frame while the terminating node of the transfer path decides the output line used to output the frame therefrom according to the output line set in the frame, thereby transmitting the frame to the output line. | 09-16-2010 |
20140016461 | PACKET RELAY DEVICE AND METHOD - When a delay between a packet relay device and a receiving terminal increases, congestion notifications are delayed, and communication quality declines. When a flow is assessed to be in a congestion state, a packet delay device overwrites, within a packet header of an acknowledgement packet for the flow which is received thereafter from a receiving terminal, a field which denotes a network congestion state with a value which denotes that a congestion state is in effect, and transmits same as an acknowledgement packet. It is thus possible to issue a congestion notification over a path from the packet relay device to the receiving terminal, eliminating a congestion notification path from the packet relay device to the receiving terminal and from the receiving terminal to the packet relay device, facilitating avoiding a decline in communication quality even if the delay between the packet relay device and the receiving terminal increases. | 01-16-2014 |
20140192647 | NETWORK APPARATUS, PERFORMANCE CONTROL METHOD, AND NETWORK SYSTEM - To prevent the switching time influences power saving efficiency and packet loss prevention performance, it is provided a network apparatus for transferring packets, including a transfer part for transferring received packets to a given destination, and a determining part for obtaining traffic volume of the packets to be transferred. The determining part determines periodicity of changes to the traffic volume, predicts traffic volume after a predetermined period of time with use of the determined periodicity, and controls transfer performance of the transfer part based on a result of the traffic volume prediction. | 07-10-2014 |
20150029861 | COMMUNICATION DEVICE AND COMMUNICATION SYSTEM - There is provided a communication device for controlling an upper limit bandwidth of TCP communication for transmission. There is further provided a communication device for enhancing a communication bandwidth for TCP and restricting it to an upper limit for transmission by use of new TCP for enhancing a communication bandwidth. The device comprises a transmission bandwidth control unit for determining a communication bandwidth of each session of TCP or new TCP, a token bucket update unit for determining whether packets are transmittable per session, and a maximum bandwidth control unit for determining whether packets are transmittable based on an upper limit of a total sum of all the set sessions, wherein when the maximum bandwidth control unit determines that packets are transmittable, the token bucket update unit transmits packets of a session determined as transmittable. | 01-29-2015 |
20150318958 | COMMUNICATION APPARATUS AND PACKET TRANSFER METHOD - To efficiently retransmit discarded packets and to reduce discarded location storage capacity, it is provided a communication apparatus to be coupled to a network, the communication apparatus being configured to: transmit data to a correspondent communication apparatus coupled to the network; receive an acknowledgement transmitted from the correspondent communication apparatus; monitor whether or not a storage capacity shortage for storing discarded locations of transmitted data in the correspondent communication apparatus; and retransmit data by setting a retransmission priority for discarded locations in a case of the storage capacity shortage. | 11-05-2015 |
20150319064 | PACKET COMMUNICATION METHOD AND DEVICE - An object of the present invention is to measure a packet loss rate by using information included in a general communication protocol. In a network including a transmission terminal, a communication line, and a reception terminal, the transmission terminal adds a number denoting a packet order to a transmission packet and transmits the transmission packet, and the reception terminal is a system using a protocol in which an order of packets, which have been received, is returned as an acknowledgement, and a system using a selective acknowledgement to notify of reception of discontinuous data when the reception terminal receives the discontinuous data. A method for measuring a packet loss rate by using a number of transmission packets and information on an acknowledgement and a selective acknowledgement is provided in the transmission terminal. | 11-05-2015 |