摘要:
A communication system includes: a plurality of distributed control devices, each of which is configured to utilize a first wireless communication for forming a network cell and controlling at least one communication device coupled to the network cell to transfer data via the first wireless communication, based on a communication path of multi-hop communication; at least one relay device coupled to a network cell formed by one of the plurality of distributed control devices and configured to utilize the first wireless communication for transferring the data from the one of the plurality of distributed control devices to another one of the plurality of distributed control devices; and a central control device configured to utilize a second wireless communication for managing the communication path and controlling the plurality of distributed control devices located in the communication path to transfer the data, based on the communication path.
摘要:
A communication system includes a first communication apparatus, a second communication apparatus, and a third communication apparatus. The first communication apparatus transfers content data to the second communication apparatus and the third communication apparatus using wireless communication. The second communication apparatus includes a first communication unit that transfers first control data including a reception request for receiving the content data transferred by the first communication apparatus if the wireless communication between the second communication apparatus and the first communication apparatus is disconnected. The third communication apparatus includes a second communication unit that transfers the content data transferred by the first communication apparatus to the second communication apparatus using the wireless communication if the third communication apparatus receives the first control data from the second communication apparatus.
摘要:
In the invention, wireless communication devices transmit beacon frames in an order in compliance with a CSMA/CA protocol. A wireless communication device as a transmitting station of a multicast frame uses one of the beacon frames to notify wireless communication devices as receiving stations of the multicast frame that an ACK frame is to be transmitted when the multicast frame is received. On receipt of the multicast frame, the wireless communication devices as the receiving stations transmit ACK frames in order of transmitting the beacon frames at SIFS intervals.
摘要:
In a communication system incorporating a communication apparatus that transfers/receives a TS packet using MPEG-2-TS to synchronize a video signal with an audio signal includes a communication circuit to pad the TS packet with a null frame to reach a prescribed frame size when storing the TS packet that includes a PCR value in a frame. In the communication apparatus, the communication circuit deletes the null frame in the TS packet when receiving the TS packet. The communication apparatus further includes an encoder that outputs a PCR report signal that indicates that the generated TS packet includes the PCR value to the communication circuit. In the communication apparatus, the size of the frame is set in multiples of the size of the TS packet. The communication apparatus further includes an input device to configure whether the TS packet is padded automatically or manually.
摘要:
A communication system includes multiple first communication devices and second and third communication devices. Each first communication device performs first wireless communication using a directive radio wave using first and second function modules; performs second wireless communication wider in communication range than the first wireless communication using a third function module; and generates different network cells. The second communication device performs the first wireless communication with the first function module and connects to one of the network cells. The third communication device manages a multi-hop communication path using the second wireless communication. Each first communication device collects, in the first wireless communication, peripheral communication device information; transmits the information to the third communication device in the second wireless communication; and transfers, in the first wireless communication, data received in the first wireless communication to another communication device, through the communication path instructed by the third communication device.
摘要:
A wireless communication system includes a first wireless communication apparatus and multiple second wireless communication apparatuses. The first wireless communication apparatus includes circuitry that detects that a wireless communication between the first wireless communication apparatus and at least one of the second wireless communication apparatuses is disconnected, requests, if the circuitry detects that the wireless communication with at least one of the second wireless communication apparatuses is disconnected, one of the second wireless communication apparatuses whose wireless communication is not disconnected to perform beam-forming training sequence directed to the second wireless communication apparatus whose wireless communication is disconnected, and determines, based on a result of the beam-forming training sequence acquired from the second wireless communication apparatus whose wireless communication is not disconnected, the second wireless communication apparatus whose wireless communication is not disconnected as a relay apparatus for the second wireless communication apparatus whose wireless communication is disconnected.
摘要:
A wireless communication system includes multiple wireless communication devices including a first wireless communication device that centrally controls a plurality of second wireless communication devices and compatible with a multiple wireless communication standards. The multiple wireless communication standards includes a first wireless communication standard and one or more wireless communication standards using a frequency band lower than that of the first wireless communication standard. The first wireless communication device includes a receiver, a determination unit, and a transmitter. The plurality of second wireless communication devices each establish the wireless communication using the first wireless communication standard based on the routing information that each of the plurality of second wireless communication devices itself acquires from the first wireless communication device.
摘要:
A wireless communication system includes a first wireless communication apparatus and multiple second wireless communication apparatuses. The first wireless communication apparatus includes circuitry that detects that a wireless communication between the first wireless communication apparatus and at least one of the second wireless communication apparatuses is disconnected, requests, if the circuitry detects that the wireless communication with at least one of the second wireless communication apparatuses is disconnected, one of the second wireless communication apparatuses whose wireless communication is not disconnected to perform beam-forming training sequence directed to the second wireless communication apparatus whose wireless communication is disconnected, and determines, based on a result of the beam-forming training sequence acquired from the second wireless communication apparatus whose wireless communication is not disconnected, the second wireless communication apparatus whose wireless communication is not disconnected as a relay apparatus for the second wireless communication apparatus whose wireless communication is disconnected.
摘要:
In a communication system incorporating a communication apparatus that transfers/receives a TS packet using MPEG-2-TS to synchronize a video signal with an audio signal includes a communication circuit to pad the TS packet with a null frame to reach a prescribed frame size when storing the TS packet that includes a PCR value in a frame. In the communication apparatus, the communication circuit deletes the null frame in the TS packet when receiving the TS packet. The communication apparatus further includes an encoder that outputs a PCR report signal that indicates that the generated TS packet includes the PCR value to the communication circuit. In the communication apparatus, the size of the frame is set in multiples of the size of the TS packet. The communication apparatus further includes an input device to configure whether the TS packet is padded automatically or manually.
摘要:
In the invention, wireless communication devices transmit beacon frames in an order in compliance with a CSMA/CA protocol. A wireless communication device as a transmitting station of a multicast frame uses one of the beacon frames to notify wireless communication devices as receiving stations of the multicast frame that an ACK frame is to be transmitted when the multicast frame is received. On receipt of the multicast frame, the wireless communication devices as the receiving stations transmit ACK frames in order of transmitting the beacon frames at SIFS intervals.