Method and apparatus for transmitting data based on OFDM
AssigneeElectronics and Telecommunications Research Institute
InventorsSeok Bong Hyun, Byung Jo Kim, Seong Su Park
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Abstract
Provided is a method and apparatus for transmitting data based on OFDM (Orthogonal Frequency Division Multiplexing). The method includes: forming a plurality of packets suitable for a selected transmission mode from data input to a transmitter; determining a transfer rate of the data; when the data transfer rate is determined to be low and synchronous connection oriented link should be maintained, dividing each of the plurality of packets into a plurality of sub-packets; and transmitting the divided sub-packets, wherein when the divided sub-packets are transmitted, a power supply duration of the transmitter is reduced by using a DPM (dynamic power management) or fine state control unit.
Claims7
A method for transmitting data based on OFDM (Orthogonal Frequency Division Multiplexing), the method comprising the steps of:
- forming a plurality of packets suitable for a selected transmission mode from data input to a transmitter;
- determining a transfer rate of the data and required quality of service;
- when a data transfer rate is determined to be low and a synchronous connection oriented link should be maintained, dividing each of the packets into a plurality of divided sub-packets, wherein a power supply duration of the transmitter is reduced from a transmission end time of each of the divided sub-packets to a transmission start time of a next sub-packet;
- and
- transmitting the divided sub-packets, wherein when the divided sub-packets are transmitted, the power supply duration of the transmitter is reduced.
An apparatus for transmitting data based on Orthogonal Frequency Division Multiplexing (OFDM), the apparatus comprising:
- a packet configuration unit for forming a plurality of packets suitable for a selected transmission mode from payload data generated in an upper application layer and a MAC (Media Access Control) layer and storing the plurality of packets therein;
- a packet dividing unit for, when it is determined that a transfer rate of the stored packets is low, dividing each of the plurality of packets into a plurality of sub-packets;
- a modulating unit for OFDM-modulating the payload data of the packets or the sub-packets;
- an analog/RF unit for converting the modulated signal into an analog signal and RF-transmitting the converted analog signal;
- and
- a fine state controlling unit or dynamic power management (DPM) unit for, when the sub-packets are transmitted, reducing a power supply duration of the modulating unit and the analog/RF unit, wherein the fine slate controlling unit reduces the power supply duration of the modulating unit and the analog/RE unit from a transmission end time of each of the sub-packets to a transmission start time of a next sub-packet.
Dependencies are inferred from the claim text.