Wireless communication system, wireless communication apparatus, wireless communication method and computer program
The present invention eliminates a transmission-waiting operation which is unnecessary while accommodating a prioritized traffic. Although a communication station enters a transmission-disallowed state in response to detection of a signal addressed to another station in accordance with medium access control based on CSMA, if the communication station receives a frame transmitted with priority to a local station during the transmission waiting, it cancels the transmission-disallowed state, sends back a frame responding the frame transmitted with priority and effectively operates a transmission prioritized period. The communication station starts a search procedure to perform a processing of evading duplication of the transmission prioritized periods if it judges a possibility of a problem occurring in a time zone in which reception with priority is possible.
1. A wireless communication system comprising:
a plurality of communication stations, said plurality of communication stations configured to transmit beacons with information associated with a network being described therein to each other communication station to construct a network, each communication station configured to receive timing information from said neighborhood communication station, the timing information indicating which time periods during which the neighborhood communication station cannot receive a transmission.
2. The wireless communication system according to claim 1 , wherein each communication station is configured to decide which time periods the communication station cannot receive a transmission based on the received timing information of the neighborhood communication station.
3. The wireless communication system according to claim 1 , wherein each communication station is configured to receive timing information including an indication for each time period in a frame whether or not the neighborhood communication station can receive a transmission in each time period in the frame or not.
4. A wireless communication station comprising:
a transmitter configured to transmit a beacon with information associated with a network being described therein to another communication station to construct a network, the beacon also including timing information indicating which time periods during which the communication station cannot receive a transmission; and
a receiver configured to receive timing information from said another communication station, the timing information indicating which time periods during which the another communication station cannot receive a transmission.
5. The wireless communication station according to claim 4 , further comprising:
a decision unit configured to decide which time periods the communication station cannot receive a transmission based on the received timing information of the another communication station.
6. The wireless communication station according to claim 5 , wherein the decision unit is configured to generate an indication for each time period in a frame whether or not the communication station can receive a transmission in each time period in the frame or not.
7. The wireless communication station according to claim 4 , wherein the receiver is configured to receive timing information including an indication for each time period in a frame whether or not the another communication station can receive a transmission in each time period in the frame or not.
8. A wireless communication method comprising:
transmitting a beacon with information associated with a network being described therein from a first communication station to a second communication station to construct a network, the beacon also including timing information indicating which time periods during which the first communication station cannot receive a transmission;
receiving the timing information by the second communication station;
determining by the second communication station a time period during which the first communication station can receive a transmission; and
transmitting information from second communication station to the first communication station during the time period in which the first indication station can receive a transmission.
9. The wireless communication method according to claim 8 , further comprising:
determining by the second communication station which time periods the second communication station cannot receive a transmission based on the received timing information of the first communication station.
10. The wireless communication system according to claim 9 , further comprising:
generating by the second communication station an indication for each time period in a frame whether or not the second communication station can receive a transmission in each time period in the frame or not.
11. The wireless communication system according to claim 10 , further comprising:
transmitting from the second communication station to the first communication station the indication for each time period in a frame whether or not the second communication station can receive a transmission in each time period in the frame or not.
12. The wireless communication method according to claim 8 , further comprising: receiving by the second communication station timing information including an indication for each time period in a frame whether or not the first communication station can receive a transmission in each time period in the frame or not.