Automatic retransmission in communications systems

摘要

Automatic retransmission in communications systems. In one embodiment, a portion of data is identified to be retransmitted based on feedback information indicating a negative acknowledgement (NACK) during a cyclic redundancy check (CRC) on a previous transmission of the portion of data. A retransmission mode is selected for the portion of data, from at least a first mode that retransmits the portion of data on at least a first transmitter antenna while transmitting new data on at least a second transmitter antenna, based on first desired transmission characteristics; and a second mode that retransmits the portion of data simultaneously on at least the first and second transmitter antennas, based on second desired transmission characteristics.

主权项

1. A method in a multiple-input multiple-output (MIMO) communications system, for retransmitting data, the method comprising:
identifying that a portion of data is to be retransmitted based on a feedback information indicating that the portion of data received a negative acknowledgement (NACK) during a cyclic redundancy check (CRC) on a previous transmission of the portion of data; determining an error allowance of an application type associated with the portion of data; selecting a retransmission mode for retransmitting the portion of data based on the error allowance of the application type associated with the portion of data, including:
based at least on determining that the application type allows for error by prioritizing volume of data transfer over data transfer accuracy, selecting a first mode of retransmission that retransmits the portion of data on at least a first transmitter antenna while transmitting new data on at least a second transmitter antenna; orbased at least on determining that the application type does not allow for error by prioritizing data transfer accuracy over volume of data transfer, selecting a second mode of retransmission that retransmits the portion of data simultaneously on at least the first and second transmitter antennas; and retransmitting the portion of data using the selected mode of retransmission.