Patent ID: 7978651

Claim:
A method for managing bandwidth for quality of service (QoS)-based uplink data transmission of a mobile terminal in an orthogonal frequency division multiple access (OFDMA)/time division multiple access (TDMA)-based high-speed portable Internet (HPi) system, the method comprising: scanning, by the mobile terminal, management messages queued in the mobile terminal; calculating a desired bandwidth for each connection identifier (CID) of the management messages queued in the mobile terminal; scanning user packets queued in the mobile terminal; calculating a desired bandwidth for each CID of the user packets queued in the mobile terminal; identifying a bandwidth request for each CID of the management messages and for each CID of the user packets as a general access type or a random access type; storing bandwidth requests identified as the general access type in a general access type bandwidth request list; storing bandwidth requests identified as the random access type in a random access type bandwidth request list; performing the bandwidth requests stored in the random access type bandwidth request list prior to performing the bandwidth request stored in the general access type bandwidth request list; and re-performing a bandwidth request for a CID when the type of bandwidth request is changed from the general access type to the random access type, wherein the management messages are linked to each other through a linked list in a management message list and are pointed by a connection identifier index indicating a predetermined connection of the mobile terminal and a control channel index indicating a type of a control channel for transmission of the management message of the mobile terminal, and wherein the user packets are linked to each other through a linked list in a user packet list and are pointed by the connection identifier index and a service class index indicating quality of service classes of uplink data of the mobile terminal.