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 communication circuit used in a mesh station using a signal described in IEEE 802.11, comprising:
a modulator circuit configured to output a modulated signal based on information specifying a duration of transmission opportunities and information specifying a periodicity of the transmission opportunities,
wherein the mesh station sets an offset of the transmission opportunity indicating a beginning of the transmission opportunity with respect to a beginning of a transmission interval.
2. The communication circuit according to claim 1 , wherein the communication circuit
sets the information specifying the duration of the transmission opportunities and the information specifying the periodicity of the transmission opportunities,
transmits the information specifying the duration of the transmission opportunities, the information specifying the periodicity of the transmission opportunities, and the offset of the transmission opportunity to at least one other mesh station, and
outputs the modulated signal during the transmission opportunity.
3. A communication method performed in a mesh station using a signal described in IEEE 802.11, comprising:
outputting, with circuitry, a modulated signal based on information specifying a duration of transmission opportunities and information specifying a periodicity of the transmission opportunities; and
setting, with the circuitry, an offset of the transmission opportunity indicating a beginning of the transmission opportunity with respect to a beginning of a transmission interval.
4. The communication method according to claim 3 , further comprising:
setting the information specifying the duration of the transmission opportunities and the information specifying the periodicity of the transmission opportunities;
transmitting the information specifying the duration of the transmission opportunities, the information specifying the periodicity of the transmission opportunities, and the offset of the transmission opportunity to at least one other mesh station; and
outputting the modulated signal during the transmission opportunity.
5. A non-transitory computer-readable storage medium storing computer-readable instructions thereon, which, when executed by a mesh station using a signal described in IEEE 802.11, cause the mesh station to perform a method comprising:
outputting a modulated signal based on information specifying a duration of transmission opportunities and information specifying a periodicity of the transmission opportunities; and
setting an offset of the transmission opportunity indicating a beginning of the transmission opportunity with respect to a beginning of a transmission interval.
6. The non-transitory computer-readable storage medium according to claim 5 , further comprising:
setting the information specifying the duration of the transmission opportunities and the information specifying the periodicity of the transmission opportunities;
transmitting the information specifying the duration of the transmission opportunities, the information specifying the periodicity of the transmission opportunities, and the offset of the transmission opportunity to at least one other mesh station; and
outputting the modulated signal during the transmission opportunity.