Patent ID: 7965632

Claim:
A wireless communication system operating without a base station and including a plurality of communication apparatuses associated with respective communication areas, the system comprising: an information transmission source communication apparatus for forming a data packet by inserting a preamble signal into each transmission data and transmitting the formed data packet to a receiving destination communication apparatus over a transmission path, the receiving destination communication apparatus being one of the communication apparatuses that are located within the communication area of the transmission source communication apparatus, wherein a preamble signal is inserted in each transmission packet transmitted between the transmission source communication apparatus and the receiving destination communication apparatus so as to be integral with each transmission data, wherein said transmission packet being at least one of a beacon signal, a data packet, an acknowledgment packet, a negative acknowledgment packet, a transmission request packet, and a confirmation notice packet, wherein said transmission packet contains error detection information for header information in said transmission packet, wherein said beacon signal and data packet contain error detection information for payload information in respective beacon signal and data packet; and at least one of the plurality of communication apparatuses not currently communicating for recognizing that the transmission path is used for a predetermined interval by the transmission source communication apparatus and the receiving destination communication apparatus from a time when a preamble signal from a transmission packet is detected.