METHOD AND DEVICE FOR MULTI-USER DATA TRANSMISSION IN WIRELESS LOCAL AREA NETWORK

摘要

The invention provides a method for multi-user data transmission in a multiple input multiple output (MIMO) system. The method includes: transmitting a request to send (RTS) to the main user on at least two bandwidths; receiving a clear to send (CTS) transmitted by the main user on each bandwidth, said CTS being the response from the main user to the RTS; transmitting the RTS to a secondary user on the same bandwidth used to receive the CTS transmitted by the main user; receiving a CTS transmitted by the secondary user, said CTS being the response from the secondary user to the RTS; transmitting data to the main user and the secondary user on the same bandwidth used to receive the CTS transmitted by the main user and the CTS transmitted by the secondary user. The bandwidth for transmitting the RTS of the secondary user in the invention can be dynamically adjusted according to the useable bandwidth of the main user to avoid the transmission of unnecessary RTS on certain secondary channels and conserve the transmission power of the access point (AP) and the user.