Apparatus and method for transmitting/receiving data in a communication system
AssigneesSamsung Electronics Co., Ltd., Korea Advanced Institute of Science and Technology (KAIST)
InventorsDong-Ho Kim, Bang-Chul Jung, Dan-Keun Sung, Yung-Soo Kim, Young-Jun Hong, Sung-Soo Cho
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Abstract
A method and apparatus for transmitting/receiving data in a communication system are provided, in which an MCS level is determined for data, a codeword including the data and a parity is generated by encoding the data using the determined MCS level, code symbols are generated from the codeword using IR scheme, and each of the code symbols is sent in a corresponding subframe.
Claims10
A method for transmitting Multicast/Broadcast Service (MBS) data by a Base Station (BS) in a communication system, the method comprising the steps of:
- receiving Channel Quality Information (CQI) from a plurality of Mobile Stations (MSs) receiving a same type of MBS data, wherein the plurality of MSs includes at least three MSs;
- detecting a first MS having a most inferior channel status among the plurality of MSs receiving the same type of MBS data, based on the received CQI;
- determining a Modulation and Coding Scheme (MCS) level for the MBS data based on the CQI received from the first MS;
- transmitting, to the first MS, a first message indicating to feed back CQI in a first period;
- transmitting, to all other MSs, except the first MS, among the plurality of MSs receiving the same type of MBS data, a second message indicating to feed back CQI in a second period, wherein the second period is configured to be longer than the first period;
- detecting a second MS, different from the first MS, as having the most inferior channel status based on the CQI received during the first period and the second period;
- and
- when the second MS is detected as having the most inferior channel status based on the CQI received during the first period and the second period, changing the MCS level based on the CQI received from the second MS, and transmitting information on the changed MCS level to the plurality of MSs;
- and
- determining MCS levels differently for different types of MBS data, and changing MCS levels each time an MS having a most inferior channel status for each of the types of MBS data changes.
A Base Station (BS) for transmitting Multicast/Broadcast Service (MBS) data in a communication system, the BS comprising:
- a transmitter;
- a receiver configured to receive Channel Quality Information (CQI) from a plurality of Mobile Stations (MSs) receiving a same type of MBS data, wherein the plurality of MSs includes at least three MSs;
- and
- a controller configured
- to detect a first MS having a most inferior channel status among the plurality of MSs receiving the same type of MBS data, based on the received CQI,
- to determine a Modulation and Coding Scheme (MCS) level for the MBS data based on the CQI received from the first MS, to control the transmitter transmit, to the first MS, a first message indicating to feed back CQI in a first period,
- to control the transmitter to transmit, to all other MSs, except the first MS, among the plurality of MSs receiving the same type of MBS data, a second message indicating to feed back CQI in a second period, wherein the second period is configured to be longer than the first period,
- to detect a second MS, different from the first MS, as having the most inferior channel status based on the CQI received during the first period and the second period,
- when the second MS is detected as having the most inferior channel status based on the CQI received during the first period and the second period, to change the MCS level based on the CQI received from the second MS, and to control the transmitter to transmit information on the changed MCS level to the plurality of MSs,
- wherein the controller is configured to determined MCS levels differently for different types of MBS data, and to change MCS levels each time an MS having a most inferior channel status for each of the types of MBS data changes.
Dependencies are inferred from the claim text.