Method and apparatus for transmitting packet by using indirect acknowledgement timer in wired/wireless integrated network

A packet transmission apparatus connected to a transmitter through a wired link and connected to a receiver through a wireless link, comprising:

• a transceiver for the transmitter connected with the transmitter through the wired link, for receiving a data packet and transmitting an acknowledgement packet or an indirect acknowledgement packet;
• a transceiver for the receiver connected with the receiver through the wireless link, for transmitting a data packet and receiving the acknowledgement packet;
• a buffer for storing a data packet received from the transmitter;
• and
• an indirect acknowledgement controller for establishing an indirect acknowledgement timer to a data packet stored in said buffer, setting up a size of the buffer base on the acknowledgement packet received from the transceiver for the receiver and generating an indirect acknowledgement packet according to whether the buffer is overflowed in case the acknowledgement packet is not received from the receiver until the indirect acknowledgement timer is elapsed.

A computer readable record medium storing instructions for executing a method for transmitting a packet in a packet transmission apparatus, the method comprising the steps of:

• a) setting up an indirect acknowledgement timer to a data packet received from the transmitter, storing the data packet into a buffer and transmitting the data packet to receiver;
• b) updating a size of the buffer based on a acknowledgement packet received from the receiver and treating the data packet received from the transmitter;
• and
• c) transmitting an indirect acknowledgement packet to the transmitter according to a state of the buffer in case an acknowledgement packet is not received from the receiver until the indirect acknowledgement timer is elapsed.