Method and apparatus for reserving data channel in a wireless access system

A method for reserving a data channel in a wireless access system, the method performed by a receiving node and comprising:

• receiving a first request frame for reserving the data channel from a sending node;
• and
• transmitting a notify frame to the sending node after a first time period expires but before a second time period expires, if the first request frame collides with a second request frame received from another sending node;
• or
• transmitting the notify frame to the sending node after the second time period expires, if the first request frame does not collide with the second request frame,
• wherein the first time period is a Short Inter-Frame Space (SIFS) and the second time period is an Intermediate Inter-Frame Space (IIFS) which is configured with the SIFS and a slot time.

A sending node supporting a method for reserving a data channel in a wireless access system, the sending node comprising:

• a transmission module for transmitting a radio frame;
• a reception module for receiving a radio frame;
• and
• a processor supporting the method for reserving the data channel,
• wherein the transmission module transmits a request frame for reserving the data channel,
• the reception module receives a notify frame in response to the request frame after a first time period or after a second time period, and
• the processor determines that the request frame has been collided when the notify frame is received after the first time period expires but before the second time period expires and determines that the data channel has been reserved successfully when the notify frame is received after the second time period expires, and
• wherein the first time period is a Short Inter-Frame Space (SIFS) and the second time period is an Intermediate Inter-Frame Space (IIFS) which is configured with the SIFS and a slot time.

A receiving node supporting a method for reserving a data channel in a wireless access system, the receiving node comprising:

• a transmission module for transmitting a radio frame;
• a reception module for receiving a radio frame;
• and
• a processor supporting the method for reserving the data channel,
• wherein the reception module receives a first request frame for reserving the data channel from a sending node, and
• the transmission module transmits a notify frame to the sending node after a first time period expires but before a second time period expires when the first request frame collides with a second request frame received from another sending node, or transmits the notify frame to the sending node after the second time period expires when the first request frame does not collide with the second request frame, and
• wherein the first time period is a Short Inter-Frame Space (SIFS) and the second time period is an Intermediate Inter-Frame Space (IIFS) which is configured with the SIFS and a slot time.