Abstract: Provided is a communication apparatus and a method that allow for synthesis of information using an original signal and a retransmission signal for retransmitting information of the original signal whose demodulation has failed, in wireless communication with independent physical layer and MAC layer. Information is transmitted regarding a configuration of a retransmission signal for retransmitting information of an original signal whose demodulation has failed to a sender of the retransmission signal, and the retransmission signal transmitted from the sender is received on the basis of the information regarding the configuration of the retransmission signal transmitted. The present disclosure is applicable, for example, to a transmission/reception apparatus, a communication apparatus, an information processing apparatus, electronic equipment, a computer, a storage medium, and a system, and so on.

Abstract: To provide a communication apparatus that realizes data sharing and coordinate transmit of shared data. A communication apparatus that operates as an access point includes: a communicating unit configured to transmit and receive wireless signals; and a control unit configured to control communication operations in the communicating unit, the communication operations including a communication operation for sharing data to be simultaneously transmitted to a single communication terminal between adjacent access points and a communication operation for recognizing that sharing of the data has been completed. The control unit is configured to perform control when transmitting the shared data simultaneously with the adjacent access points so as to multiplex the shared data with a transmission stream addressed to another communication apparatus and transmit the shared data as a multi-user multiplexed stream.

Abstract: The present technology relates to a wireless communication apparatus and method, and a program which enable communication to be performed more efficiently. The wireless communication apparatus includes a preamble generating unit configured to generate a preamble signal including header information, an inter-training generating unit configured to generate an inter-training signal including at least part of information of the header information, and a wireless transmission processing unit configured to transmit transmission data after transmitting the preamble signal in at least one or more frequency channels among a plurality of the frequency channels and transmit a plurality of the inter-training signals by utilizing one or a plurality of the frequency channels among the plurality of the frequency channels during a transmission period of the transmission data. The present technology can be applied to a wireless communication apparatus.

Abstract: Provided is a communication device that favorably implements SR communication and MU communication. A communication device that operates as a base station includes a determination unit that determines a communication status in a BSS of the communication device, and a control unit that controls transmission and reception of a signal regarding connection change of a terminal according to the communication status to and from a surrounding base station. The determination unit determines the presence of a small number of terminals falling outside a distribution of implementation statuses of spatial reuse communication or multi user communication of entire subordinate terminals, and transmits a signal requesting the small number of terminals to be connected to the surrounding base station or transmits a signal inquiring of the surrounding base station acceptance of the small number of terminals.

Abstract: The present technology relates to a communication control device, a communication control method, a communication terminal, and a communication method that enable an access point serving as a connection destination, to be smoothly switched. A communication control device causes a second communication device to generate a switching response frame indicating a response of connection switching that is to be transmitted to a communication terminal configured to switch a connection destination from a first communication device to the second communication device, on the basis of information regarding connection between the first communication device and the communication terminal. The present technology can be applied to a communication system.

Abstract: A communication device and a communication method for allowing a communication terminal to be able to search for access points within a short time are provided. A communication device operating as an access point in a wireless network transmits a beacon signal at a predetermined beacon interval on an operation channel selected from available frequency channels. In addition, the communication device performs data transmission and data reception to/from a communication terminal subordinate thereto on the operation channel, and transmits a notification signal including information about the operation channel while switching channels at each predetermined cycle in available frequency channels other than the operation channel.

Abstract: The present technology relates to an information processing device and method and a program capable of efficiently protecting sufficient security. An information processing device includes a communication unit that transmits information regarding security of the information processing device and receives designation information indicating processing to be performed for security protection, transmitted in response to the transmission of the information regarding the security and a control unit that performs the processing for security protection on a basis of the designation information in a case where the control unit transmits data to a predetermined device or in a case where the control unit receives data transmitted from the device. The present technology is applicable to a healthcare IoT system.

Abstract: [Object] To make it possible to reduce wasteful retransmission processing and improve use efficiency of communication channels with regard to wireless LAN systems. [Solving Means] There is provided a wireless LAN communication apparatus including: a transmitter that transmits a data frame storing a plurality of fixed-length pieces of coded data for which it is possible to determine whether or not decoding is successfully performed; and a controller that controls retransmission processing in units of the pieces of coded data.

Abstract: A communication device and a communication method that transmit and receive wireless packets are provided. A communication device includes a control unit that determines a subcarrier to be a null tone according to information applied to a packet and a transmission unit that generates a multi-carrier signal in which the determined subcarrier is set as a null tone and wirelessly transmits the signal. The control unit determines a position of a subcarrier and the number of subcarriers to be a null tone or a position of a subcarrier in correspondence with the information and, in addition, changes a subcarrier to be a null tone according to temporal variation of the information.

Abstract: To provide a communication apparatus which controls channel access operation under a multi user environment, and a communication method. Channel access operation of each STA after an MU mode is finished is controlled through a trigger frame from an AP to prevent collision immediately after the MU mode is finished. Further, the AP sets a smaller CW upon transmission of the trigger frame than a CW of an STA to preferentially transmit the trigger frame and give priority to communication in the MU mode over communication in an SU mode. Further, by the CW of each STA upon switching of the mode being not reset, a transmission waiting period after the MU mode is finished is shortened.

Abstract: The present technology relates to a communication apparatus and a communication method capable of realizing more reliable communication. Provided is a communication apparatus including a control unit that performs control to use an available frequency channel to transmit a data frame to another communication apparatus, and add, to the data frame, available channel information regarding the frequency channel available for transmitting and receiving a frame. The present technology can be applied to, for example, a wireless LAN system.

Abstract: Wireless transmission paths are utilized efficiently. An information processing device includes a control section. If data destined for the own device is received from another device and if there exists undelivered data in the data, the control section performs control to transmit a retransmission request for the data to the other device. If there exists no undelivered data in the data destined for the own device and received from the other device, the control section performs control not to transmit a confirmation of reception.

Abstract: [Overview] [Problem to be Solved] It is possible to achieve more appropriate retransmission control in wireless LAN systems. [Solution] There is provided a wireless LAN communication device including: a generator that generates a data frame for which a data unit in which an encoding process is performed and a data unit in which a retransmission process is performed are different from each other; and a transmission section that transmits the data frame. The encoding process makes it possible to determine whether or not decoding is successful.

Abstract: The present technology relates to a communication apparatus and a communication control method that make it possible to enhance the flexibility of a communication network. A communication apparatus includes a monitoring section that monitors a status of a communication network having a hierarchical structure, a role setting section that sets a role in the hierarchical structure on the basis of the status of the communication network, and an operation control section that controls execution of operation of the role that has been changed. The present technology can be applied to a communication apparatus that performs wireless communication in a communication network, for example.

Abstract: A plurality of sensor devices that senses environmental data at installation positions is appropriately arranged. Each sensor device includes a device detection unit, a position fixing unit, a sensor unit, and a transmission unit. The device detection unit performs operation of detecting another sensor device in the surrounding area and generates a detection result thereof. The position fixing unit fixes a position of the own sensor device on the basis of the detection result obtained by the device detection unit. The sensor unit senses environmental data at a position fixed by the position fixing unit. The transmission unit transmits the data sensed by the sensor unit.

Abstract: A communication device shortening a scanning time of a communication terminal is provided. A communication device functioning as an access point includes: a first signal processing unit generating a first signal of which a subordinate communication terminal is notified; a second signal processing unit generating a second signal which includes information regarding the first signal and of which a communication terminal before connection is notified; and a communication unit simultaneously transmitting the first and second signals. The second signal includes information regarding a channel to be used to transmit the first signal and further includes at least one piece of information among a transmission length of the second signal, a transmission length of the first signal, and the number of times the second signal is repeated.

Abstract: An information processing device includes a condition setting unit that sets a change condition that is a condition for changing data, and a data processing unit that changes the data in a case where the change condition is satisfied.

Abstract: The present technology relates to a communication apparatus and a communication method that permit realization of more reliable communication. Provided is a communication apparatus that includes a control section that performs control such that plural aggregated subframes are sent in a predetermined sequence for each frame included in each of spatially multiplexed streams when a frame is sent to another communication apparatus as plural spatially multiplexed streams. The present technology is applicable, for example, to a communication apparatus included in a wireless LAN system.

Abstract: A wireless communication device in a wireless network sets management information notification cycles at specified time intervals and transmits management information containing receive timing information showing its own position to start receiving information, receive window information, and receive cycle information. Another wireless communication device receiving that management information links it to a communication device number for the corresponding wireless communication device and stores the receive timing, the receive window information, and the receive cycle information. When seeding information, the receive start position of the corresponding communication device is found from the receive timing information, the receive window information, and the receive cycle information of the other, communication and information is then transmitted at that timing. An asynchronous ad-hoc communication wireless network can therefore be configured without a particular control station.

Abstract: To provide a mechanism capable of improving the efficiency of communications without disturbing other communications, presented herein is a wireless communication device having a reception circuitry that receives a signal and a transmission circuitry that transmits a signal on a basis of a first threshold value set in association with a second threshold value. The first threshold value includes a detection level related to an electric wave in the wireless communication device, and the second threshold value includes a reception determination level of a signal detected by the wireless communication device.