Patent ID: 8270379

Claim:
A wireless terminal constituting an ad-hoc network to perform communication, comprising: a frame transmitter to transmit a data frame wirelessly, the data frame containing a frame identifier and a variable that is to be modified according to a predetermined rule when the data frame directly received by a first subsequent wireless terminal is forwarded from the first subsequent wireless terminal to a second subsequent wireless terminal, as well as when the data frame is forwarded from the second subsequent wireless terminal to yet another subsequent wireless terminal; a memory to store a record of the variable at the time of transmission of the data frame by the frame transmitter; a frame receiver to receive a data frame wirelessly transmitted from one of the first and second subsequent wireless terminals which have forwarded the data frame originally transmitted by the frame transmitter, the received data frame having the same frame identifier as the data frame transmitted by the frame transmitter; and a frame reception recognizer to recognize that the first subsequent wireless terminal has received the data frame transmitted by the frame transmitter, when a difference between the variable contained in the received data frame and the variable stored in the memory is one, and that the second subsequent wireless terminal has received the data frame transmitted by the transmitting, when the difference between the variable contained in the received data frame and the variable stored in the memory is two.