COEXISTENCE SYSTEM TO INTEGRATE HETEROGENEOUS WIRELESS NETWORK DEVICES USING THE SAME FREQUENCY BAND INTO ONE HARDWARE BOARD AND ITS OPERATION METHOD

摘要

A coexistence system for integrating heterogeneous wireless network devices, which use an identical frequency band, into a single board and an operation method thereof are provided to increase the throughput, reduce the frequency of retransmission, and minimize the power consumption by enabling an IEEE 802.11 WLAN and an IEEE 802.15.4 LR-WPAN to successfully execute their respective communication without any collision even though an identical frequency band is used. A coexistence system for integrating heterogeneous wireless network devices, which use an identical frequency band, into a single board comprises the first wireless network equipment(30), a synchronization unit(20), and the second wireless network equipment(10). The first wireless network equipment(30), or an IEEE 802.15.4 LR-WPAN, generates an interrupt to make a request for active channel reservation. The synchronization unit(20), such as ACROS(Active Channel Reservation for cOexiStence) software, forwards a channel reservation request interrupt in order to synchronize the time information between the first wireless network equipment(30) and the second wireless network equipment(10) which uses the same frequency band as the first wireless network equipment(30). The second wireless network equipment(10), or an IEEE 802.11 WLAN, reserves a radio channel through an RTS(Request To Send)/CTS(Clear To Send) switching scheme according to the channel reservation request interrupt. The second wireless network equipment(10), inactivated during the reservation period, helps the first wireless network equipment(30) to use the radio channel without interference.