Radio communication base station device, radio communication mobile station device, and radio communication method
View Patent ↗In order to perform appropriate reception quality control on each mobile station in a multimedia broadcast/multicast service, a layered coding section 101 encodes input data by dividing the input data into two layers and obtains a first layer code string and a second layer code string. The first layer code string is input to a CRC code addition section 102 and a CRC code for an error inspection is added thereto at every predetermined block. On the other hand, the second layer code string is input to a CRC code addition section 103 and a CRC code for an error inspection is added thereto at every predetermined block. The first layer code string and the second layer code string with the CRC codes added are input to a layered modulation section 104 and the layered modulation section 104 modulates a plurality of code strings coded by being divided into a plurality of layers in such away that error rates differ hierarchically among the plurality of code strings and a radio section 105 sends the modulated symbol.
1. A radio communication mobile station apparatus comprising:
a receiving section that receives one symbol transmitted from a radio communication base station apparatus;
a demodulation section that demodulates the one symbol to obtain a base layer encoded string and an enhanced layer encoded string;
an inspection section that performs error inspection of the base layer encoded string and the enhanced layer encoded string;
a measuring section that measures reception quality of the one symbol; and
a transmission section that transmits a notification signal for notifying the reception quality to the radio communication base station apparatus when one or both of the base layer encoded string and the enhanced layer encoded string have an error and that does not transmit the notification signal for notifying the reception quality to the radio communication base station apparatus when neither the base layer encoded string nor the enhanced layer encoded string has an error,
wherein the radio communication base station apparatus:
divides input data into base layer data and enhanced layer data and encodes the base layer data and the enhanced layer data to obtain the base layer encoded string and the enhanced layer encoded string,
assigns the base layer encoded string to a higher bit of a plurality of bits forming the one symbol and the enhanced layer encoded string to a lower bit of the plurality of bits forming the one symbol to generate the one symbol, and
transmits the one symbol.