Access network device for managing queue corresponding to real time multimedia traffic characteristics and method thereof

A queue management method of an access network device providing a mobile node with access to a network and, in which if a packet destined for the mobile node is received, the access network stores the packet in a transmission queue and transmitting the stored packet to the mobile node in a storage order, the method comprising:

• the access network device receiving from the mobile node a handover initiation packet indicating a beginning of a handover when the handover of the mobile node initiates;
• the access network device transmitting the packet to a new access network device when the packet destined for the mobile node is received after the reception of the handover initiation packet;
• determining whether the packet is transmittable within a delivery deadline allowed for real-time transmission at the mobile node when the packet is for real-time transmission;
• and
• dropping the packet instead of storing the packet in the transmission queue when determined that the packet transmission is infeasible within the delivery deadline.

An access network device comprising:

• a packet input part receiving a packet destined for a certain node;
• a transmission queue storing the packet received through the packet input part and transmitting the packet in a sequential order of the storage;
• and
• a controller dropping the packet instead of storing the packet in the transmission queue when the received packet is for real-time transmission and a prediction of infeasibility to transmit the packet within a delivery deadline allowed for the real-time transmission packet to a destination node has been made.

An access network device providing a mobile node with access to a certain network, the device comprising:

• a packet input part receiving a packet destined for the mobile node and a handover initiation packet indicating a handover initiation of the mobile node;
• a transmission queue storing the packet received after the reception of the handover initiation packet and transmitting the packet to a new access network device handover from the mobile node in a storage order;
• and
• a controller dropping the packet instead of storing the packet in the transmission queue when the received packet is for real-time transmission and a prediction of infeasibility to transmit the packet within a delivery deadline allowed for the real-time transmission of the packet from a destination node has been made.