Apparatus and method for controlling traffic between wireless LAN device and access point in a wireless LAN system

An access point for controlling traffic for real time service in a wireless local area network (LAN) system, the access point transmitting and receiving packets to and from a wireless LAN terminal in said wireless LAN system, said access point comprising:

• a transceiver for transmitting and receiving a packet to and from said wireless LAN terminal;
• a signal-determination unit for determining whether the packet is real time packet;
• and
• a signal-controlling unit for controlling re-transmission according to transmission failure when the packet is determined to be a real time packet by said signal-determination unit.

An apparatus for controlling traffic between at least one wireless local area network (LAN) terminal and an access point in a wireless LAN system, said apparatus comprising:

• a first signal-determination unit in said wireless LAN terminal for determining whether a first packet to be transmitted is a real time packet;
• a first signal-controlling unit in said wireless LAN terminal for controlling re-transmission according to transmission failure when the first packet to be transmitted is determined to be a real time packet by said first signal-determination unit;
• a second signal-determination unit in said access point for determining whether a second packet to be transmitted is a real time packet;
• and
• a second signal-controlling unit in said access point for controlling re-transmission according to transmission failure when the second packet to be transmitted is determined to be a real time packet by said second signal-determination unit.

A method for controlling traffic for real time service between wireless local area network (LAN) terminals and an access point in a wireless LAN system, the method comprising the steps of:

• (a) determining, at a first wireless LAN terminal, whether any other wireless LAN terminal attempts to re-transmit a packet to the access point;
• (b) when it is determined in step (a) that no other wireless LAN terminal attempts to re-transmit a packet to the access point, determining, at the first wireless LAN terminal, whether the packet to be transmitted to the access point is a real time packet;
• and
• (c) when the packet to be transmitted to the access point is a real time packet as determined in step (b), controlling, at the first wireless LAN terminal, packet re-transmission according to transmission failure.