Patent ID: 8588189

Claim:
An OFDMA-TDMA (Orthogonal Frequency Division Multiple Access-Time Division Multiple Access) based wireless Internet terminal comprising: a QoS profile storing information about a QoS policy; Media Access Control (MAC) layer software, comprising: a classifier configured to identify a type of packet traffic and classify data packets corresponding to the packet traffic according to the QoS policy stored in the QoS profile, an admission controller configured to determine admission or discard the classified data packets provided from a plurality of QoS queues based on a current call state and characteristics of the classified data packets, and a first priority controller configured to give first priorities to the admitted classified data packets according to the QoS policy; and MAC layer hardware, comprising: a PDU maker configured to generate PDUs from the data packets given the first priorities, a second priority controller configured to determine data packet types of the PDUs based on headers or an identifier of the PDUs and determine second priorities of the PDUs based on the determined data packet types and a predetermined priority policy that predetermines priorities of data packets according to a data packet type, wherein the second priorities are different from the first priorities; a sorting queue configured to store the PDUs based on the second priorities of the PDUs assigned by the second priority controller, and a transmitter configured to arrange the PDUs given the second priorities in an allocated bandwidth to transmit the PDUs; wherein the MAC layer software further comprises the plurality of QoS queues for dividing and storing the data packets classified by the classifier, and a plurality of priority queues for dividing and storing the data packets admitted by the admission controller based on their first priorities, wherein the classifier identifies the type of packet traffic and stores a data packet of the packet traffic in one of the plurality of QoS queues based on the QoS policy corresponding to the identified type, wherein the admission controller stores the data packet, which is determined for admission, in one of the plurality of priority queues and discards data packets that have a degree of importance lower than a predetermined degree based on a network state, and wherein the type of the packet traffic comprises at least one of audio data and burst data, and wherein the PDUs are MAC PDUs, and the second priority controller determines which one among an ACK packet, a management message packet and a user data packet, a corresponding packet is, based on headers or identifiers of the MAC PDUs and gives the second priories to the MAC PDUS in the order of the ACK packet, the management message packet and the user data packet independently from the QoS profile.