METHOD OF HANDLING HARQ COLLISION AND PUSCH RETRANSMISSION COLLISION IN TDD

摘要

A method of handling PUSCH data retransmission collision, in a user terminal of TDD, wherein, the user terminal uses a first UL/DL configuration mode in a first radio frame, the method comprises the following steps: receiving a reconfiguration message from a base station, the reconfiguration message is used to indicate the user terminal to use a second UL/DL configuration mode in a second radio frame; judging whether PHICH for a first PUSCH data transmission is located in the first radio frame; if yes, judging whether the second radio frame includes a collision subframe, wherein, the downlink subframe occupied by the PHICH is also used to bear uplink retransmission resource allocation; when including, determining a retransmission uplink subframe used to retransmit PUSCH data by using a remapping scheme, when the second radio frame includes the collision subframe; and retransmitting the PUSCH data in the retransmission uplink subframe.

主权项

1. A method of handling PUSCH data retransmission collision, in a user terminal of a time division multiplexing system, wherein, the user terminal uses a first UL/DL configuration mode in a first radio frame, and the user terminal uses PHICH feedback to determine whether the data from PUSCH is received correctly, the method comprises:
receiving a reconfiguration message from a base station, the reconfiguration message is used to indicate the user terminal to use a second UL/DL configuration mode in a second radio frame adjacent to the first radio frame; judging whether PHICH for a first PUSCH data transmission is located in the first radio frame; judging whether the second radio frame includes a collision subframe if the PHICH for the first PUSCH data transmission is located in the first radio frame, wherein, the downlink subframe occupied by the PHICH for the first PUSCH data transmission is also used to bear a uplink retransmission resource allocation, the collision subframe is a uplink subframe to which the uplink retransmission resource allocation is to be mapped according to the first UL/DL configuration mode, but to be configured as a downlink subframe according to the second UL/DL configuration mode; determining a retransmission uplink subframe used to retransmit PUSCH data by using a remapping scheme, when the second radio frame includes the collision subframe; and retransmitting the PUSCH data in the retransmission uplink subframe.