Reverse transmission apparatus and method in a mobile communication system supporting HARQ
First Claim
1. A mobile station apparatus for retransmitting data in a reverse direction upon receiving a retransmission request for a data transmitted from a base station after transmitting the data in the reverse direction in a mobile communication system supporting hybrid automatic retransmission request (HARQ), comprising:
- a radio frequency (RE) receiver for receiving a retransmission control signal for the reverse data over a forward link; and
a controller for determining whether to retransmit the reverse data using the retransmission control signal received from the RE receiver, and controlling transmission of retransmission data using a traffic-to-pilot power ratio (TPR) included in the retransmission control signal.
1 Assignment
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Accused Products
Abstract
A mobile station apparatus and method for retransmitting data in a reverse direction upon receiving a retransmission request for the data transmitted in the reverse direction from a bases station after transmitting the data in the reverse direction in a mobile communication system supporting hybrid automatic retransmission request (HARQ). The apparatus comprises a radio frequency (RF) receiver for receiving a retransmission control signal for the reverse data over a forward link; and a controller for determining whether to retransmit the reverse data using the retransmission control signal received from the RF receiver, and controlling transmission of retransmission data using a traffic-to-pilot power ratio (TPR) included in the retransmission control signal.
18 Citations
42 Claims
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1. A mobile station apparatus for retransmitting data in a reverse direction upon receiving a retransmission request for a data transmitted from a base station after transmitting the data in the reverse direction in a mobile communication system supporting hybrid automatic retransmission request (HARQ), comprising:
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a radio frequency (RE) receiver for receiving a retransmission control signal for the reverse data over a forward link; and a controller for determining whether to retransmit the reverse data using the retransmission control signal received from the RE receiver, and controlling transmission of retransmission data using a traffic-to-pilot power ratio (TPR) included in the retransmission control signal. - View Dependent Claims (2, 3, 4, 5, 7)
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6. A mobile station apparatus for retransmitting data in a reverse direction upon receiving a retransmission request for a data received from a base station after transmitting the data in the reverse direction in a mobile communication system supporting hybrid automatic retransmission request (HARQ), comprising:
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a radio frequency (RF) receiver for receiving a retransmission control message for the reverse data over a forward link; a controller for outputting a control signal including a number of retransmission data symbols depending on the retransmission control message received from the RF receiver; and a channel encoder for channel-encoding the reverse data, and outputting the encoded data according to the control signal. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A base station apparatus for transmitting a retransmission request message for received data in a mobile communication system supporting hybrid automatic retransmission request (HARQ), comprising:
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an Eb/Nt (ratio of energy to interference per bit) calculator for measuring Eb/Nt of data received. an error detection signal generator for checking whether there is an error in the received data and generating an error detection signal according to the checking result; a controller for determining a traffic-to-pilot power ratio (TPR) value during retransmission using information received from the Eb/Nt calculator upon receiving the error detection signal for the received data from the error detection signal generator; and a transmitter for forming forward control information using the TPR value determined by the controller, and transmitting the forward control information. - View Dependent Claims (14, 15, 16)
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17. A base station apparatus for transmitting a retransmission request message for received data in a mobile communication system supporting hybrid automatic retransmission request (HARQ), comprising:
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an Eb/Nt (ratio of energy to interference per bit) calculator for measuring Eb/Nt of the received data; an error detection signal generator for checking whether the received data has an error and generating an error detection signal according to the checking result; a controller for determining a number of retransmission code symbols using information received from the Eb/Nt calculator upon receiving the error detection signal for the received data from the error detection signal generator; and a transmitter for forming forward control information using the number of retransmission code symbols determined by the controller, and transmitting the forward control information. - View Dependent Claims (18, 19, 20, 21)
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22. A method for retransmitting data in a reverse direction upon receiving a retransmission request from a bases station in a mobile communication system supporting hybrid automatic retransmission request (HARQ), comprising the steps of:
- (a) decoding a received signal, and determining whether the received signal includes the retransmission request; and
(b) if the received signal includes the retransmission request, controlling a traffic-to-pilot power ratio (TPR) according to retransmission control information included in the received signal, and then performing retransmission through a reverse channel. - View Dependent Claims (23, 24, 25, 31)
- (a) decoding a received signal, and determining whether the received signal includes the retransmission request; and
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26. A method for retransmitting data in a reverse direction by a mobile station upon receiving a retransmission request from a base station in a mobile communication system supporting hybrid automatic retransmission request (HARQ), comprising the steps of:
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(a) decoding a received control information, and determining whether the control information includes the retransmission request; (b) if the control information includes the retransmission request, generating as many retransmission data symbols as a number of symbols, whose information is included in the control information; and (c) retransmitting the generated retransmission data symbols over a reverse channel. - View Dependent Claims (27, 28, 29, 30)
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32. A method for transmitting a retransmission request message for received data in a mobile communication system supporting hybrid automatic retransmission request (HARQ), comprising the steps of:
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(a) measuring Eb/Nt (ratio of energy to interference per bit) of reverse data when an error has occurred in the received data; (b) determining a traffic-to-pilot power ratio (TPR) required during retransmission using a total Eb/Nt value of the received data; and (c) forming control information using the TPR value required during retransmission, and transmitting the control information over a given forward channel. - View Dependent Claims (33, 34, 35, 36, 37)
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38. A method for transmitting a retransmission request message for received data by a base station in a mobile communication system supporting hybrid automatic retransmission request (HARQ), comprising the steps of:
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determining whether the data received in the reverse direction has an error; determining a number of code symbols required during retransmission by comparing an Eb/Nt value of the data transmitted from a mobile station with a target Eb/Nt value; and forming control information using information on the number of retransmission code symbols, and transmitting the control information. - View Dependent Claims (39, 40, 41, 42)
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Specification