Mobile communication system, base station apparatus, user equipment, and method
A base station apparatus is used in a mobile communication system in which at least a shared data channel is transmitted by an orthogonal modulation scheme using an I-channel and a Q-channel. The base station apparatus includes a providing unit providing Acknowledgement/Non-Acknowledgement information indicating whether retransmission of a signal received in uplink is required; a mapping unit mapping a number of multiplexed users of the Acknowledgement/Non-Acknowledgement information to the I-channel or the Q-channel based on a predetermined mapping table; and a reporting unit reporting the Acknowledgement/Non-Acknowledgement information to the respective users. The mapping table indicates that, when the number of the multiplexed users is equal to or less than a predetermined number, the Acknowledgement/Non-Acknowledgement information is associated with the I-channel or the Q-channel, and otherwise, the Acknowledgement/Non-Acknowledgement information is associated with the I-channel and the Q-channel.
1. A base station apparatus comprising:
an antenna;
a receiving unit that receives data on a physical uplink shared channel (PUSCH) from a user equipment terminal, the physical uplink shared channel (PUSCH) being assigned to one or more resource blocks, a plurality of resource blocks including the one or more resource blocks being arranged in a frequency direction, a resource block number being assigned to each of the resource blocks;
a generation unit comprising circuitry configured to generate Acknowledgement/Non-Acknowledgement information (ACK/NACK) for the physical uplink shared channel (PUSCH) received by the receiving unit; and
a transmission unit that transmits via the antenna the Acknowledgement/Non-Acknowledgement information (ACK/NACK) generated by the generation unit to the user equipment terminal,
wherein the resource of the Acknowledgement/Non-Acknowledgement information (ACK/NACK) transmitted by the transmission unit corresponds to the minimum resource block number among the resource block numbers of the one or more resource blocks assigned to the physical uplink shared channel (PUSCH), and
wherein the Acknowledgment/Non-Acknowledgment information (ACK/NACK) transmitted to the user equipment terminal by the transmission unit, the resource of which Acknowledgement/Non-Acknowledgement information
(ACK/NACK) corresponds to the minimum resource block number among the resource block numbers of the one or more resource blocks assigned to the physical uplink shared channel (PUSCH), is code-spread.
2. The base station apparatus according to claim 1 ,
wherein the resource of the Acknowledgement/Non-Acknowledgement information (ACK/NACK) transmitted by the transmission unit is assigned to any one of I-channel and Q-channel for a single user equipment terminal and is assigned to any one of the I-channel and the Q-channel or both for a plurality of user equipment terminals.
3. A user equipment terminal comprising:
an antenna;
a transmission unit that transmits data on a physical uplink shared channel (PUSCH) to a base station apparatus, the physical uplink shared channel (PUSCH) being assigned to one or more resource blocks, a plurality of resource blocks including the one or more resource blocks being arranged in a frequency direction, a resource block number being assigned to each of the resource blocks; and
a receiving unit that receives Acknowledgement/Non-Acknowledgement information (ACK/NACK) for the physical uplink shared channel (PUSCH) transmitted by the transmission unit,
wherein the resource of the Acknowledgement/Non-Acknowledgement information (ACK/NACK) received by the receiving unit corresponds to the minimum resource block number among the resource block numbers of the one or more resource blocks assigned to the physical uplink shared channel (PUSCH) transmitted by the transmission unit, and
wherein the Acknowledgment/Non-Acknowledgment information (ACK/NACK) transmitted to the user equipment terminal and received by the receiving unit, the resource of which Acknowledgement/Non-Acknowledgement information (ACK/NACK) corresponds to the minimum resource block number among the resource block numbers of the one or more resource blocks assigned to the physical uplink shared channel (PUSCH), is code-spread.
4. The user equipment terminal according to claim 3 ,
wherein the resource of the Acknowledgement/Non-Acknowledgement information (ACK/NACK) received by the receiving unit is assigned to any one of I-channel and Q-channel for a single user equipment terminal and is assigned to any one of the I-channel and the Q-channel or both for a plurality of user equipment terminals.
5. A communication method for a base station apparatus communicating with a user equipment terminal, the method comprising the steps of:
receiving data on a physical uplink shared channel (PUSCH) from the user equipment terminal, the physical uplink shared channel (PUSCH) being assigned to one or more resource blocks, a plurality of resource blocks including the one or more resource blocks being arranged in a frequency direction, a resource block number being assigned to each of the resource blocks;
generating Acknowledgement/Non-Acknowledgement information (ACK/NACK) for the physical uplink shared channel (PUSCH) received in the receiving; and
transmitting the Acknowledgement/Non-Acknowledgement information (ACK/NACK) generated in the generating to the user equipment terminal,
wherein the resource of the Acknowledgement/Non-Acknowledgement information (ACK/NACK) transmitted in the transmitting corresponds to the minimum resource block number among the resource block numbers of the one or more resource blocks assigned to the physical uplink shared channel (PUSCH), and
wherein the Acknowledgment/Non-Acknowledgment information (ACK/NACK) transmitted to the user equipment terminal and received in the receiving, the resource of which Acknowledgement/Non-Acknowledgement information (ACK/NACK) corresponds to the minimum resource block number among the resource block numbers of the one or more resource blocks assigned to the physical uplink shared channel (PUSCH), is code-spread.
6. A communication method for a user equipment terminal communicating with a base station apparatus, the method comprising the steps of:
transmitting data on a physical uplink shared channel (PUSCH) to the base station apparatus, the physical uplink shared channel (PUSCH) being assigned to one or more resource blocks, a plurality of resource blocks including the one or more resource blocks being arranged in a frequency direction, a resource block number being assigned to each of the resource blocks; and
receiving Acknowledgement/Non-Acknowledgement information (ACK/NACK) for the physical uplink shared channel (PUSCH) transmitted in the transmitting,
wherein the resource of the Acknowledgement/Non-Acknowledgement information (ACK/NACK) received in the receiving corresponds to the minimum resource block number among the resource block numbers of the one or more resource blocks assigned to the physical uplink shared channel (PUSCH) transmitted in the transmitting), and
wherein the Acknowledgment/Non-Acknowledgment information (ACK/NACK) transmitted to the user equipment terminal and received in the receiving, the resource of which Acknowledgement/Non-Acknowledgement information (ACK/NACK) corresponds to the minimum resource block number among the resource block numbers of the one or more resource blocks assigned to the physical uplink shared channel (PUSCH), is code-spread.
7. A communication system comprising:
a user equipment terminal that transmits data on a physical uplink shared channel (PUSCH) that is assigned to one or more resource blocks, a plurality of resource blocks including the one or more resource blocks being arranged in a frequency direction, a resource block number being assigned to each of the resource blocks; and
a base station apparatus that generates Acknowledgement/Non-Acknowledgement information (ACK/NACK) for the physical uplink shared channel (PUSCH) received from the user equipment terminal and transmits the generated Acknowledgement/Non-Acknowledgement information (ACK/NACK) to the user equipment terminal,
wherein the resource of the Acknowledgement/Non-Acknowledgement information (ACK/NACK) transmitted by the base station apparatus corresponds to the minimum resource block number among the resource block numbers of the one or more resource blocks assigned to the physical uplink shared channel (PUSCH) received by the base station apparatus, and
wherein the Acknowledgment/Non-Acknowledgment information (ACK/NACK) transmitted to the user equipment terminal by the base station apparatus, the resource of which Acknowledgement/Non-Acknowledgement information/ACK/NACK) corresponds to the minimum resource block number among the resource block numbers of the one or more resource blocks assigned to the physical uplink shared channel (PUSCH), is code-spread.