Medium access control method and data transmission method using the same in wireless local area network

A method for transmitting data using a medium access control (MAC) protocol in a wireless local area network (WLAN), comprising:

• forming a first superframe of a shared channel, wherein the first superframe comprises a plurality of downlinks, a plurality of uplinks, and a plurality of short uplinks, and wherein a total number of the plurality of downlinks is equal to a total number of the plurality of uplinks;
• transmitting a bandwidth schedule report (BSR) frame to a plurality of terminals, wherein the BSR frame is transmitted via a first downlink in the plurality of downlinks in the first superframe, and wherein the BSR frame identifies which of the uplinks and downlinks in the first superframe are allocated to which of the terminals;
• receiving a bandwidth request (BR) frame from a first terminal in the plurality of terminals, wherein the BR frame comprises a request for bandwidth allocation for the first terminal in a second superframe of the shared channel, and wherein the BR frame is received via one of the short uplinks in the first superframe;
• allocating bandwidth in the second superframe to the first terminal in response to the receiving the BR frame;
• transmitting a second BSR frame to the plurality of terminals, wherein the second BSR frame is transmitted via a first downlink in the second superframe, and wherein the second BSR frame identifies which of uplinks and downlinks in the second superframe are allocated to which of the terminals;
• and
• transmitting data frames and an acknowledge frame to one or more of the terminals, wherein the data frames and the acknowledge frame are transmitted via one or more allocated downlinks in the second superframe.

A method for transmitting data using a medium access control (MAC) protocol in a wireless local area network (WLAN), comprising:

• receiving, by a terminal, a bandwidth schedule report (BSR) frame from a base station, wherein the BSR frame is received via a first downlink in a plurality of downlinks in a first superframe of a shared channel, wherein the first superframe comprises the plurality of downlinks, a plurality of uplinks, and a plurality of short uplinks, and wherein the BSR frame identifies which of the uplinks and downlinks in the first superframe are allocated to the terminal;
• transmitting, by the terminal, a bandwidth request (BR) frame to the base station, wherein the BR frame comprises a request for bandwidth allocation for the terminal in a second superframe of the shared channel, and wherein the BR frame is transmitted via one of the short uplinks in the first superframe;
• receiving, by the terminal, a second BSR frame from the base station, wherein the second BSR frame is received via a first downlink in the second superframe, wherein the second BSR frame identifies which of uplinks and downlinks in the second superframe are allocated to the terminal, and wherein the uplinks and downlinks in the second superframe that are allocated to the terminal correspond to the request in the BR frame;
• and
• transmitting, by the terminal, data frames and an acknowledge frame to the base station, wherein the data frames and the acknowledge frame are transmitted via one or more allocated uplinks in the second superframe.