Wireless communication system, and interference preventing method

摘要

Where two or more wireless communication networks having mutually different physical layers coexist, and wireless communication is performed between a plurality of devices and a coordinator in each one of the wireless communication networks, the coordinator of one wireless communication network generates coexistence notification frame data to notify coordinators of the other wireless communication networks of existence of the coordinator. This first coordinator encodes the generated coexistence notification frame data, inserts source data so as to be set as FEC data, modulates the FEC data through a Gaussian frequency shifting keying system (GFSK) so as to be set as a GFSK modulated wave signal, and transmits the GFSK modulated wave signal to the coordinators of the other wireless communication networks.

主权项

1. A wireless communication system comprising:
two or more coexisting wireless communication networks having mutually different physical layers, each network having a plurality of devices and a coordinator, wireless communication being performed between said plurality of devices and the coordinator in each of the wireless communication networks, said coordinator configured to enter a scanning period upon initial input of power and thereafter transmitting in a superframe format, said scanning period having a length that is equal to or longer than a length of a superframe; and the coordinator of one wireless communication network including: a data generating unit that generates coexistence notification frame data used for notifying coordinators of the other wireless communication network(s) of existence of the coordinator; an FEC encoder that encodes the coexistence notification frame data generated by the data generating unit and inserts source data before the encoding into the encoded data as source code data so as to be set as FEC data; a modulation unit that modulates the FEC data transmitted from the FEC encoder through a Gaussian frequency shifting keying system (GFSK) or a frequency shifting keying system (FSK) so as to be set as a modulated wave signal; and a transmission unit that transmits the modulated wave signal generated by the modulation unit to the coordinators of the other wireless communication network(s), said coexistence notification frame data being transmitted once for at least one superframe; and said coordinator of the one wireless communication network being configured to acquire the coexistence notification frame data transmitted by another coordinator of another wireless communication network that is present in a vicinity during the scanning period and, upon acquiring the coexistence notification frame data of the another coordinator, to perform control for preventing communication interference with the another wireless communication network.