Fujitsu Corporation

Junji Tagane

Ryuji Oda

Masahiro Tanaka

Tomoyuki Furutono

Norihito Nishimoto

Kazuhiro Muraoka

Norimichi Hiroshige

Kazunori Umezaki

Seiji Tokunaga

Minoru Nishida

Akio Koga

Kaori Chigusa

Ryuji Fukuhara

Katsuyuki Fujiyoshi

When a connection control device determines that the connection control device is in a congested state, based on whether a usage of at least one of hardware resources necessary for call processing to establish a call connection is equal to or more than a predetermined threshold value, the CPU of the connection control device forcefully disconnects an established call connection after a connection available time elapses, and, when an INVITE message is transmitted from a terminal device, the CPU of the connection control device receives the INVITE message, calculates the wait time, creates and transmits a response message stating the wait time, and stores the message as a reserved call on a reservation list.

Telephony system, connection control method, connection control device and recording medium

A network quality monitoring device includes a packet receiving unit that receives packets used by a signaling protocol server device that is a server device for processing the signaling protocol, a signaling protocol packet extracting unit that extracts signaling protocol packets for controlling the signaling protocol from packets received by the packet receiving unit, a session management table storing unit that stores the session management tables, a signaling protocol quality analyzing unit that collects quality information regarding the network quality from a session management table corresponding to sessions that have transitioned to a predetermined communication state among the session management tables stored in the session management table storing unit and, based on the collection result, analyzes statistical information regarding the network quality.

Network quality monitoring device and method for internet services involving signaling

A SIP serverincludes a first memorystoring a route management table in which, of route set information specified by a SIP signal on a session-by-session basis, address information as of each Record-Route header value is associated with a logical number, the same address information as of a Record-Route header values being set to the same single logical number; and a second memorystoring session information other than the address information as of each Record-Route header value, instance management information for use in session control, and logical numbers. The address information as of each Record-Route header value, which is stored in the first memoryis read on the basis of the logical numbers stored in the second memory

Server for transferring a communication message

A transmitting/receiving unit receives a SIP signal after occurrence of trouble in a SIP server and outputs a call ID of the SIP signal to a recovery-file searching unit. A session control unit once again procures a call process resource and an instance for a session corresponding to a recovery file and stores the call process resource data and the instance data in a main storage unit. The main storage unit stores anew session data included in the recovery file. A recovery-file creating unit creates the recovery file. An external storage unit stores therein the recovery file. The recovery-file searching unit retrieves from the external storage unit the recovery file that matches with the call ID output by the transmitting/receiving unit and outputs the recovery file to the session control unit and the main storage unit.

Communication management apparatus and communication management method

A method and a system for seizing at least one communication channel for use in a first call. Information on a plurality of states of a plurality of communication channels are held in an channel-state-information holding unit. Based on the information on the states of the communication channels, at least one optimum communication channel from among the plurality of communication channels is determined as the at least one communication channel, and seized for use in the first call. The determination is made so that after the above determination and seizure for the first call, consecutive communication channels for use in a second call can be successfully seized with high probability. Further, when consecutive communication channels are required for the first call, and not immediately available, the at least one optimum communication channel may be secured by vacating one of the plurality of communication channels used in an existing call, and allocating an idle one of the plurality of communication channels to the existing call.

Method and system of seizing communication channel enhancing usability of remaining communication channels

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Fukuoka, Japan

Junji Tagane