摘要:
An encryption information determination section in a communication device negotiates an encryption algorithm to be used for encrypted communications with an encryption information determination section in a network camera, which is a communication counterpart. At this time, the encryption algorithm to be selected is varied depending on the CPU load of the communication device. That is, if the CPU utilization rate is high, a low-load encryption algorithm is selected, and if the CPU utilization rate is low, a high-load encryption algorithm is selected. A encryption/decryption processing section performs code processing using the encryption algorithm selected by the encryption information determination section.
摘要:
To provide a communication apparatus for achieving further improvements in communication quality and power saving effect, without depending on network environments. A portable terminal (211) as a communication apparatus includes: a communication I/F unit (108) performing data transmission/reception with a transmitter apparatus (203) on a communication protocol having flow control such as TCP; a power control unit (106) switching power on and off to the communication I/F unit (108); and a suppression/resumption control unit (104) determining cycle interval Tc and cycle data size Dc according to communication quality required by a communication application program and, per cycle interval Tc, causing data of cycle data size Dc to be transmitted in a burst state, suppressing data transmission from the transmitter apparatus (203), and causing the power control unit (106) to power off the communication I/F unit (108) while the data transmission is suppressed (T2 to T3), using the flow control mechanism.
摘要:
A transmitting side communications device transmits a Delete Payload of an IPsec SA using an ISAKMP SA that satisfies a transmission condition, and more preferably using all ISAKMP SAs that exist between communications devices. The receiving side communications device accepts a Delete Payload by an ISAKMP SA that satisfies a reception condition, and preferably any ISAKMP SA that exists between the communications devices. As long as there exists an IPsec SA that was established using the ISAKMP SA, it remains possible to maintain an ISAKMP SA, without completely deleting it, and to transmit and receive a Delete Payload by that ISAKMP SA.
摘要:
A transmitting side communications device transmits a Delete Payload of an IPsec SA using an ISAKMP SA that satisfies a transmission condition, and more preferably using all ISAKMP SAs that exist between communications devices. The receiving side communications device accepts a Delete Payload by an ISAKMP SA that satisfies a reception condition, and preferably any ISAKMP SA that exists between the communications devices. As long as there exists an IPsec SA that was established using the ISAKMP SA, it remains possible to maintain an ISAKMP SA, without completely deleting it, and to transmit and receive a Delete Payload by that ISAKMP SA.
摘要:
To provide a communication apparatus which is capable of voluntarily controlling, according to its own reception capability, data transmission traffic, while reducing the burden for the control. The communication apparatus includes: a communication unit (35) which receives data; an ACK generating unit (45) which generates an ACK packet and transmit the ACK packet to a transmitting side apparatus (38), the ACK packet indicating a response to the transmitting side apparatus (38), the response corresponding to the data received by the communication unit (35); and a window updating notification generating unit (46) which generates a window updating notifying packet and transmit the window updating notifying packet to the transmitting side apparatus (38) irrespective of a result of the data reception by the communication unit (35), the window updating notifying packet requesting the transmitting side apparatus (38) to transmit data.
摘要:
It is an object of the present invention to provide a QoS controllable communication device and communication system. A device 114 such as a first IP telephone comprising a QoS control unit 121 of the present invention transmits first transmission control data to a device 111 such as a PC performing lower priority communication. The first transmission control data includes data for changing the communication path of the lower priority communication, and the PC 111, having received the first transmission control data, performs subsequent lower priority communication through the first IP telephone or other device 114, enabling the first QoS control unit 121 to perform priority control. Because the present invention employs widely used protocols such as ARP and ICMP, the device 111 receiving the control data does not need protocols specific to the present invention.
摘要:
A content playback device includes a communication unit which communicates with a control device; a display unit which displays content; an input unit which accepts input; and a content playback authorization determination unit which determines whether to switch from content being displayed to acquired content, wherein the content playback authorization determination unit determines whether it is necessary to acquire an instruction as to whether to switch from the content being displayed to the acquired content, and when the content playback authorization determination unit acquires an authorization instruction or determines that it is not necessary to acquire the instruction, the content playback authorization determination unit switches from the content being displayed to the acquired content, and when the content playback authorization determination unit acquires a rejection instruction, the content playback authorization determination unit causes the display unit to continue display of the content being displayed.
摘要:
It is intended to provide a method of three-dimensionally culturing normal joint chondrocytes; the production and supply of chondrocytes; and a transplantation material to be used in an injured site in a joint tissue.
摘要:
The content reproduction device receives, from a server, information for indicating the location of content reproduction control information that is required for acquiring the content reproduction control information, and acquires the content reproduction control information from the server. Then, the content reproduction device extracts AV data and clip identification information for specifying clip information for managing the AV data. Then, the content reproduction device converts a predetermined part of the information for indicating the location of the content reproduction control information by applying the clip identification information and a predetermined conversion rule, generates information for indicating the location of the clip information and the AV data, and acquires the clip information and the AV data from the server.
摘要:
It is intended to provide a method of three-dimensionally culturing normal joint chondrocytes; the production and supply of chondrocytes; and a transplantation material to be used in an injured site in a joint tissue.