Abstract: An information processor of an aspect of the disclosure includes a protection section protecting first communication between a first device and a second device and second communication between a third device and the second device. The protection section executes the following (1) to (4): (1) deriving or receiving a first session key; (2) using the first session key for encryption or decryption and message authentication of the first communication; (3) using the first communication protected by the first session key to receive a second session key; and (4) using the second session key for encryption, decryption, or message authentication of the second communication. Here, the total number of times of communication or the total amount of communication data from the start of use to the end of the use of the second session key differs between the first communication and third communication between the first device and the third device.

Abstract: The present disclosure relates to an information processing device, a mobile device, and a communication system for enabling further enhancement of safety.

Abstract: Provided is a communication device, including: a transmission and reception unit that transmits and receives a signal with an other communication device; an error detection unit that detects an occurrence of an error by having the transmission and reception unit receive a preamble specifying a type of data to be transmitted next, and comparing a bit sequence of a signal received following the preamble to a bit sequence that should be transmitted for the type specified for transmission by the preamble; and a conflict avoidance unit that, if the occurrence of an error is detected by the error detection unit, instructs the transmission and reception unit to transmit a clock corresponding to a certain number of bits following the preamble, and then transmit an abort signal giving an instruction to terminate communication partway through.

Abstract: A communication apparatus includes: a communication unit that performs signal transmission to and from a communication partner apparatus; and a communication control unit that changes a signal ratio in a first direction to the communication partner apparatus and a signal ratio in a second direction from the communication partner apparatus in accordance with a signal transmission state with the communication partner apparatus.

Abstract: The present disclosure relates to a communication apparatus, a communication method, a program, and a communication system that enable more reliable communication. An I3C master receives a max read length and a max write length from an I3C slave. Then, when transmitting/receiving data to/from the I3C slave, the I3C master controls transmission/reception of the data so that the data to be transferred in one data transfer has a data length equal to or shorter than the max read length and the max write length, and transmits transfer length information indicating the data length of the data to be transferred, prior to data transfer of the data. The present technology is applicable to a bus IF, for example.

Abstract: A transmission device according to an aspect of the present disclosure communicates with a reception device via a control data bus. The transmission device includes a generation unit that generates an interrupt request, and a transmission section that transmits data to the reception device via the control data bus. The interrupt request includes at least an identification bit to identify a type of transmission data, an information bit for the transmission data, and the transmission data.

Abstract: The present disclosure relates to a communication device, a communication method, and a program for offering adaptability to a wider variety of applications and enhancing reliability of communications. With a CCI protocol implemented as an upper layer, a physical layer transmits and receives data including an extended header and an extended footer to and from another communication device. A CCI-FS processing section compares a Desination ID included in the extended header with an ID (Source ID) given to the communication device, and determines whether or not the data is for accessing the communication device. The physical layer is MIPI A-PHY that has an asymmetrical upper layer of a point-to-point topology and is designed to allow high-speed data transmission, control data, and electric power to share one physical wire. The present technology is applicable to a communication system that is used for connection in an in-vehicle camera, for example.

Abstract: Communication devices and systems are disclosed. In one example, a communication device is configured to communicate with a communication partner device in accordance with a protocol including a first operation and a second operation. The first operation includes identification information of the communication partner device, write-instructing information, identification information of a first storage unit of the communication partner device, and data to be written in the first storage unit. The second operation follows the first operation and includes identification information of the communication partner device, write-instructing information, identification information of a second storage unit of the communication partner device, information indicating a number of the protocols, and a cyclic redundancy check (CRC) code used to detect an error in the protocol. The second storage unit is configured to store the CRC code and the information indicating the number of the protocols.

Abstract: [Overview] [Problem to be Solved] To provide a communication device and a communication system that each enable transmission of a command and data of I3C in a protocol different from the I3C. [Solution] A communication device according to a first aspect of the present disclosure includes: an I3C device section that generates a command and data of I3C; and a communication device section that transmits the command and data of the I3C to another communication device via a bus by using a payload in a protocol different from the I3C.

Abstract: A communication device according to an aspect of the present disclosure includes: a determination section that determines propriety of a retransmission request on a basis of priority specified for each area within a frame in retransmission control; and a transmission section that generates retransmission request data, and makes transmission to another communication device, in a case where the retransmission request is permitted in the determination section.

Abstract: The present disclosure relates to a transmission device, a reception device, and a communication system made compatible with more various uses and adaptable to a rule of packet modification prohibition on a transmission path. The transmission device adds a packet header for extension different from a packet header for a physical layer to packet data obtained by packing data to be transmitted and generates an Application Specific payload limited as a protection range to be protected by prohibiting modification on a transmission path is generated, and adds at least a packet header for a predetermined physical layer to the Application Specific payload, to generate a packet for the physical layer. The reception device receives the transmitted packet for the physical layer and acquires the Application Specific payload from the packet. The present technology can be applied to, for example, a communication system used in connection with an inside of a mobile device or an in-vehicle camera.

Abstract: In one example, a communication device includes a LINK that generates a first output signal on a basis of a first external signal from a first external device, outputs the first output signal to a second external device, generates a second output signal on a basis of a second external signal from the second external device, and outputs the second output signal to the first external device, in which each of the first output signal and the second external signal includes command information indicating content of a command transmitted from the first external device, final-destination-device-identification-information for identifying a final destination device of data transmitted from the first external device, internal address information indicating an internal address of the final destination device, data length information indicating a length of the data transmitted from the first external device, and data-end-position-information indicating an end position of the data transmitted.

Abstract: In one example, a communication device includes a LINK that generates a first output signal on a basis of a first external signal from a first external device, outputs the first output signal to a second external device, generates a second output signal on a basis of a second external signal from the second external device, and outputs the second output signal to the first external device, in which each of the first output signal and the second external signal includes command information indicating content of a command transmitted from the first external device, final-destination-device-identification-information for identifying a final destination device of data transmitted from the first external device, internal address information indicating an internal address of the final destination device, data length information indicating a length of the data transmitted from the first external device, and data-end-position-information indicating an end position of the data transmitted.

Abstract: [Object] Effectively perform data communication [Solving Means] A communication device includes: a LINK that generates a first output signal on a basis of a first external signal from a first external device, outputs the first output signal to a second external device, generates a second output signal on a basis of a second external signal from the second external device, and outputs the second output signal to the first external device, in which each of the first output signal and the second external signal includes command information indicating content of a command transmitted from the first external device, final-destination-device-identification-information for identifying a final destination device of data transmitted from the first external device, internal address information indicating an internal address of the final destination device, data length information indicating a length of the data transmitted from the first external device, and data-end-position-information indicating an end position of t

Abstract: [Object] Effectively perform data communication [Solving Means] A communication device includes: a LINK that generates a first output signal on a basis of a first external signal from a first external device, outputs the first output signal to a second external device, generates a second output signal on a basis of a second external signal from the second external device, and outputs the second output signal to the first external device, in which each of the first output signal and the second external signal includes command information indicating content of a command transmitted from the first external device, final-destination-device-identification-information for identifying a final destination device of data transmitted from the first external device, internal address information indicating an internal address of the final destination device, data length information indicating a length of the data transmitted from the first external device, and data-end-position-information indicating an end position of t

Abstract: Communication is performed more reliably. A CCI (I3C DDR) processing section determines status of an index when requested to be accessed by an I3C master for a read operation. An error handling section then controls an I3C slave 13 to detect occurrence of an error based on the status of the index and to neglect all communication until DDR mode is stopped or restarted by the I3C master, the I3C slave 13 being further controlled to send a NACK response when performing acknowledge processing on a signal sent from the I3C master. This technology can be applied to the I3C bus, for example.

Abstract: A CCI (I3C SDR) processing section determines status of an index when requested to be accessed by an I3C master for a read operation. An error handling section then controls an I3C slave 13 to detect occurrence of an error based on the status of the index and to neglect all communication until communication is restarted or stopped by the I3C master, the I3C slave 13 being further controlled to send a NACK response when performing acknowledge processing on a signal sent from the I3C master. This technology can be applied to the I3C bus, for example.

Abstract: The present disclosure relates to a communication device, a communication method, and a program that make it possible to perform an appropriate output control based on time synchronization for a plurality of sensors. There are provided: a communication processing control section that controls communication processing in accordance with a predetermined standard with a plurality of sensors; and a time synchronization counter to implement a timing control defined in the standard. Then, information processing is performed that is necessary for an output control that causes the time synchronization counter to time synchronize with time synchronization counters included in the respective sensors to output time data indicating a timing at which sampling data is sampled together with the sampling data sampled at a predetermined sampling cycle in the plurality of sensors. The present technology is applicable, for example, to a communication system employed in a movable body including the plurality of sensors.

Abstract: The present disclosure relates to a communication device, a communication method, and a program that make it possible to provide higher communication quality. A retransmission detection unit acquires a message count included in a header of a packet transmitted from a communication device on a transmission side via a data channel, and detects the message count of the packet that is a candidate for which retransmission is requested as a retransmission candidate message count, and a retransmission request unit generates retransmission request data for requesting retransmission of the packet held to be enabled to be transmitted by the communication device on the transmission side among a plurality of the packets with the retransmission candidate message count. The present technology can be applied to, for example, a communication system mounted on a vehicle.

Abstract: To perform communication more definitely and efficiently. In order to perform communication in which a group address is used setting a plurality of arbitrary slaves to a single group and setting the group to a destination, a slave having a group-belonging capability capable of belonging to the group and performing communication is recognized. Then, in a state in which a slave having the group-belonging capability and a slave having no group-belonging capability mixedly join in a bus, the group address is assigned to the slave recognized to have the group-belonging capability. The present technology is, for example, applicable to a bus IF.