摘要:
According to an embodiment, a charge-discharge control device includes a receiving unit, a selecting unit, and a group controller. The receiving unit receives feasibility information. The selecting unit selects, of electric power devices that send the feasibility information indicating disallowance of simultaneously belonging to a plurality of charging groups, one electric power device as a representative device of the charging group to which belongs that electric power device; and selects, of electric power devices that send the feasibility information indicating disallowance of simultaneously belonging to a plurality of discharging groups, one electric power device as a representative device of the discharging group to which belongs that electric power device. Via the selected representative device, the group controller controls the other electric power devices belonging to the charging group or the discharging group to which belongs the selected representative device.
摘要:
A wireless authentication terminal that connects to a network via a wireless base station, the wireless authentication terminal comprises a communication unit that performs communication compliant with IEEE802.15.4, an authentication processing unit that transmits and receives communication messages and performs authentication processing for connecting to a network, a filter processing unit that changes the communication messages allowed to pass through between the communication unit and the authentication processing unit, an encryption level determination unit that determines a level at which the communication unit encrypts the communication message, and a control unit that controls an operation state of the filter processing unit and the encryption level determination unit based on the phase of the authentication processing in the authentication processing unit.
摘要:
One embodiment provides a charge/discharge instruction apparatus, including: a charge/discharge instruction unit which instructs a charge/discharge determination apparatus to perform a charge/discharge control of a battery; a charge/discharge information storage unit which stores charge/discharge information for charging/discharging the battery; a control unit which controls an access request to the battery based on the stored charge/discharge information and contents of the charge/discharge control; a generating unit which generates a communication message concerned with the access request controlled by the control unit; and a communication unit which transmits the communication message concerned with the access request to the charge/discharge determination apparatus.
摘要:
A determination determines permission/forbiddance to charge an accumulator that obtains electrical power from a power grid network. The determination device comprises a first acquisition unit configured to acquire first information about a requested power amount requested to charge the accumulator, a second acquisition unit configured to acquire second information about an available power amount that can be provided from the power grid network, and a determination unit configured to determine permission or forbiddance with respect to the accumulator based on the first information and the second information.
摘要:
A wireless communication apparatus including a main queue to store MAC frames, a plurality of subqueues related to the main queue and used to control retransmission of the MAC frame, each of the subqueues having different priority for transmission of the MAC frame, respectively, an extracting device configured to extract the MAC frame from the main queue on the basis of a destination and the priority, and distribute the extracted MAC frame to one of the plurality of subqueues for each priority, and an aggregating device configured to extract MAC frames from the plurality of subqueues to form a MAC super frame.
摘要:
A physical frame is generated and transmitted to a destination terminal. In this physical frame, one of a data frame, an acknowledgement frame, and an acknowledgement request frame, and a transmission permission frame which is used in place of a normal Ack frame associated with a delayed Block Ack, and permits the destination terminal to perform piggyback transmission, are aggregated.
摘要:
A communication apparatus includes a receiving device configured to receive one physical frame in which a plurality of MAC frames are aggregated. This physical frame includes one acknowledgement request frame for the plurality of MAC frames. The apparatus includes an acknowledgement frame forming device configured to form an acknowledgement frame representing reception statuses of the plurality of MAC frames in response to the acknowledgement request frame. The apparatus also includes a transmitting device configured to transmit the acknowledgement frame. This acknowledgement frame includes a compressed acknowledgement frame representing an acknowledgement bitmap having a size equal to a maximum number of MSDUs (MAC Service Data Units) when one MPDU (MAC Protocol Data Unit) corresponds to one MSDU.
摘要:
A communication apparatus includes a receiving device configured to receive a physical frame in which a plurality of MAC frames, each having a sequence number, are aggregated. A reception buffer which stores MAC frames of the physical frame received by the receiving device. A determination device determines whether or not the first MAC frame in the physical frame received by the receiving device has been successfully received. A reception buffer management device determines, when the first MAC frame has been successfully received, a MAC frame to be forwarded to an upper layer, on the basis of the sequence number of the first MAC frame, and extracts the MAC frame from the reception buffer.
摘要:
A generation device generates a frame to be transmitted to a destination communication apparatus. The frame includes a first separation field, a first MAC protocol data unit (MPDU) following the first separation field, a second separation field following the first MPDU, a third separation field following the second separation field, and a third MPDU following the third separation field. The second separation field includes length information set to a value of zero to indicate no second MPDU directly follows the second separation field. The first MPDU includes a first MAC header, a first data field, and a first frame check sequence (FCS). The first FCS is for detecting an error occurred in at least the first data field. The third MPDU includes a third MAC header, a third data field, and a third FCS. The third FCS is for detecting an error occurred in at least the third data field.
摘要:
A communication apparatus includes a receiving device configured to receive one physical frame in which a plurality of MAC frames are aggregated. This physical frame includes one acknowledgement request frame for the plurality of MAC frames. The apparatus includes an acknowledgement frame forming device configured to form an acknowledgement frame representing reception statuses of the plurality of MAC frames in response to the acknowledgement request frame. The apparatus also includes a transmitting device configured to transmit the acknowledgement frame. This acknowledgement frame includes a compressed acknowledgement frame representing an acknowledgement bitmap having a size equal to a maximum number of MSDUs (MAC Service Data Units) when one MPDU (MAC Protocol Data Unit) corresponds to one MSDU.