Wireless communication system, wireless communication device and wireless communication method, and computer program

A wireless communication system for transmitting and receiving a plurality of data units in which sequence numbers are assigned to transmit data units to identify the data units,

• wherein, if selective acknowledgement is applied, the receiving communication station describes in reception acknowledgement information ACK the sequence numbers of completely received data units in the order of sequence number, and bit map information represented by mapping the state of reception of data of the subsequent sequence numbers into relative bit positions from the sequence numbers, and transmits the information,
• wherein, if selective acknowledgement is applied, the receiving and transmitting communication stations add information indicating a causal data flow to transmit data and acknowledgement.

A wireless communication system in which random access is made concomitantly using the RTS/CTS method wherein a communication station as the origin of data transmission transmits a request to send packet RTS and starts data transmission in response to the reception of a response packet CTS from a communication station as the destination of data transmission,

• wherein it is permitted to transmit and receive packets in which any two or more of request to send RTS, confirmative advice CTS, data, and acknowledgement ACK are multiplexed.

A wireless communication device for transmitting and receiving a plurality of data units in which sequence numbers are assigned to transmit data units to identify the data units, comprising:

• an ACK information transmitting means which, if selective acknowledgement is applied, describes in a reception acknowledgement information ACK the sequence numbers of completely received data units in the order of sequence number, and bit map information represented by mapping the state of reception of data of the subsequent sequence numbers into relative bit positions from the sequence numbers in response to data reception, and transmits the information, and
• a packet transmitting means which, if selective acknowledgement is applied, adds information indicating a causal data flow when it transmits transmit data and an acknowledgement in response to data reception/transmission.

A wireless communication device which makes random access concomitantly using the RTS/CTS method wherein a communication station as the origin of data transmission transmits a request to send packet RTS and starts data transmission in response to the reception of a response packet CTS from a communication station as the destination of data transmission, the wireless communication device comprising:

• an information generating means which generates information of request to send RTS, confirmative advice CTS, data, and acknowledgement ACK;
• and
• a packet transfer communication means which transmits and receives packets in which any two or more of request to send RTS, confirmative advice CTS, data, and acknowledgement ACK are multiplexed.

A wireless communication method for transmitting and receiving a plurality of data units, comprising the steps of:

• assigning sequence numbers to transmit data units to identify the data units, and, if selective acknowledgement is applied, describing in reception acknowledgement information ACK the sequence numbers of completely received data units in the order of sequence number and bit map information represented by mapping the state of reception of data of the subsequent sequence numbers into relative bit positions from the sequence numbers in response to data reception, and transmitting the information;
• and
• adding information indicating a causal data flow when transmitting transmit data and an acknowledgement in response to data transmission/reception.

A wireless communication method for making random access concomitantly using the RTS/CTS method wherein a communication station as the origin of data transmission transmits a request to send packet RTS and starts data transmission in response to the reception of a response packet CTS from a communication station as the destination of data transmission, the method comprising:

• an information generating step in which information of request to send RTS, confirmative advice CTS, data, and acknowledgement ACK is generated;
• and
• a packet transfer communication step in which a packet in which any two or more pieces of information of request to send RTS, confirmative advice CTS, data, and acknowledgement ACK are multiplexed is transmitted and received.

A computer program described in a computer-readable format for carrying out on a computer system the control of communicating operation for transmitting and receiving a plurality of data units, the computer program comprising the steps of:

• assigning sequence numbers to transmit data units to identify the data units, and, if selective acknowledgement is applied, describing in reception acknowledgement information ACK the sequence numbers of completely received data units in the order of sequence number and bit map information represented by mapping the state of reception of data of the subsequent sequence numbers into relative bit positions from the sequence numbers in response to data reception, and transmitting the information;
• and
• adding information indicating a causal data flow when transmitting transmit data and an acknowledgement in response to data transmission/reception.

A computer program described in a computer-readable format for carrying out on a computer system the processing for controlling communicating operation in a communication environment in which random access is made concomitantly using the RTS/CTS method wherein a communication station as the origin of data transmission transmits a request to send packet RTS and starts data transmission in response to the reception of a response packet CTS from a communication station as the destination of data transmission, the computer program comprising:

• an information generating step in which information of request to send RTS, confirmative advice CTS, data, and acknowledgement ACK is generated;
• and
• a packet transfer communication step in which a packet in which any two or more pieces of information of request to send RTS, confirmative advice CTS, data, and acknowledgement ACK are multiplexed is transmitted and received.

A wireless communication system in which random access is made concomitantly using the RTS/CTS method wherein a communication station as the origin of data transmission transmits a request to send packet RTS and starts data transmission in response to the reception of a response packet CTS from a communication station as the destination of data transmission,

• wherein the RTS transmitting communication station transmits an RTS in which information related to one or more data units for which transmission is tried is described.

A wireless communication system in which a data transmitting communication station acquires transmission right on a medium and then carries out data communication with a data receiving communication station,

• wherein, after data transmission from the data transmitting communication station is stopped, it is detected whether the subsequent data is present in the data transmitting communication station or not, and, if the subsequent data is present, it is made easier for the data transmitting communication station to acquire transmission right for transmitting the subsequent data.

A wireless communication method in a communication environment in which each communication station acquires transmission right on the medium before carrying out data communication, comprising:

• a step in which the presence or absence of transmit data from other communication stations is detected;
• and
• a medium access control step in which, in response to detection of the presence of transmit data from another communication station, a signal is transmitted onto said medium for eliminating other communication stations' transmission right so as to make it easier for the communication station to acquire transmission right for transmitting data.

A computer program described in a computer-readable format for carrying out on a computer system the processing for controlling communicating operation in a communication environment in which each communication station acquires transmission right on the medium before carrying out data communication, the computer program comprising:

• a step in which the presence or absence of transmit data from other communication stations is detected;
• and
• a medium access control step in which, in response to detection of the presence of transmit data from another communication station, a signal is transmitted onto said medium for eliminating other communication stations' transmission right so as to make it easier for the communication station to acquire transmission right for transmitting data.