Abstract: A bandwidth recovery method for a communication system includes: transmitting a first uplink scheduling message to at least a first communication node and a second communication node of a plurality of communication nodes in the communication system; detecting if a communication channel is in an idle state after a first transmission start time; then, transmitting a second uplink scheduling message to the plurality of the communication nodes when the communication channel is found to be in the idle state after the first transmission start time.

Abstract: A bandwidth recovery method for a communication system includes: transmitting a first uplink scheduling message to at least a first communication node and a second communication node of a plurality of communication nodes in the communication system; detecting if a communication channel is in an idle state after a first transmission start time; then, transmitting a second uplink scheduling message to the plurality of the communication nodes when the communication channel is found to be in the idle state after the first transmission start time.

Abstract: Provided is a system for parallel transmission over WLAN and method therefor. The method comprises causing a first mobile station to transmit an RTS and causing a second mobile station to transmit a CTS after receiving the RTS; searching third mobile stations to find any one receiving the RTS not the CTS and taking it as transmitting terminal; after receiving the CTS causing the first mobile station to transmit a first fragmentation to the second mobile station, after receiving the first fragmentation causing the second mobile station to reply to the first mobile station with an ACK, and repeatedly causing the first mobile station to transmit a next fragmentation until the fragmentations have been transmitted; and causing the transmitting terminal to transmit an RTS to a receiving terminal when the first mobile station is transmitting, and causing the receiving terminal to transmit a CTS after the second mobile station replying to the first mobile station with the ACK.