Dual codeword re-transmission

摘要

The present invention addresses apparatuses, methods and computer program product for providing enhanced codeword re-transmission for multi-codeword in 4 antenna branch HSDPA MEMO wireless communication network, thereby preventing getting stuck in higher than rank 1transmissions. When a negative acknowledgement signaling is received from a terminal upon transmission including a first and a second codeword to the terminal, the codeword not associated with the negative acknowledgement signaling is replaced with a temporary codeword, and a transmission a re-transmission of the codeword associated with the negative acknowledgement signaling and the temporary codeword to the base station is caused.

主权项

1. A base station comprising:
at least one processor and at least one memory storing software, wherein the at least one processor and the at least one memory with the software are configured to cause the base station to at least:
receive a negative acknowledgement signaling from a terminal upon a first transmission comprising a first and a second codeword to the terminal, said first transmission defining a rank;provide a temporary codeword for whichever of the first and second codewords that is not associated with the negative acknowledgement signaling; andsend to the terminal a second transmission comprising a retransmission of whichever of the first and second codewords that is associated with the negative acknowledgement signaling and the temporary codeword such that the second transmission defines a same rank as the first transmission, said retransmitted codeword that is associated with the negative acknowledgement signaling being transmitted with a higher transmit power than the temporary codeword; wherein the temporary codeword is an empty codeword which cannot be used for performing an associated hybrid automatic repeat request HARQ process.