Abstract: Provided is a system for immediate retransmission over WLAN and a method therefor. The system includes a first mobile station, a second mobile station, and an AP or LN. The first mobile station intends to transmit data to the second mobile station. The method comprises in a data transmission stage causing the first mobile station to transmit a data frame to the second mobile station; in a retransmission request stage causing the AP or the LN to broadcast a retransmission.request in response to detecting that the second mobile station fails to receive the data frame; and in an immediate retransmission stage causing the first mobile station to immediately retransmit the data frame in response to receiving the retransmission.request.

Abstract: Provided is a system for load balance on APs over a WLAN and method therefor. The system comprises a WLAN switch in an ESS; a plurality of APs in the ESS, each AP having a BSS wherein at least two BSSs overlap; and a plurality of mobile stations in the BSSs wherein each of the mobile stations located in the overlaid BSSs is adapted to choose one AP for connection from the APs capable of connecting thereto. Each mobile station is adapted to detect each connected AP and record the same, in response to connection to the AP the mobile station is adapted to report information about the connected AP to the WLAN switch via the connected AP, and the WLAN switch is adapted to cause any two APs to have a substantially equal number of the connected mobile stations by adjustment.

Abstract: In a wireless local area network comprising an AP, and a first mobile station adapted to directly transmit data to a second mobile station, an enhanced direct link transmission method comprises causing the first mobile station to transmit an EDLP.request; (i) when the first and second mobile stations are adjacent, responsive to receiving the EDLP.request, the second mobile station replying an EDLP.response containing a result code indicating SUCCESS to the first mobile station in a first time or (ii) when they are not adjacent, causing the AP to reply an EDLP.response containing a result code indicating NOT_ADJACENT to the first mobile station in a second time if the second time is longer than the first time; and responsive to receiving the EDLP.response, the first mobile station transmitting a data frame to the second mobile station in the adjacent case or the AP in the non-adjacent case.

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.