SCRAMBLING AND MODULATION TO CONSTRAIN THE CONSTELLATION SIZE OF ACK/NAK TRANSMISSION ON THE DATA CHANNEL

摘要

Aspects describe maximizing a Euclidean distance for an ACK transmission as a function of the number of bits in a HARQ-ACK and a modulation order. Encoding includes placing escape sequences in the HARQ-ACK, wherein the number of escape sequences is based on the number of bits and the modulation order. Multiple encoded ACK blocks are combined to obtain a vector sequence that is multiplexed with the encoded data and interleaved, such as on a “time-first” manner. Scrambling is performed as a function of the size and the modulation order. For a 1-bit ACK, the scrambling is performed to achieve any two corners in any constellation for transmission for the ACK. For a 2-bit ACK, the scrambling is performed to achieve any four corners in any constellation for transmission for the ACK.

主权项

1. A method for facilitating maximizing a Euclidean distance for an acknowledgement (ACK) or a negative acknowledgement (NAK) transmission on an uplink, comprising:
transmitting a packet to at least one device; receiving an ACK/NAK transmission from the at least one device in response to the packet, wherein the ACK/NAK transmission is encoded as a function of a size of the ACK/NAK transmission in number of bits and a modulation order to obtain a bit sequence, the bit sequence is scrambled based on the size of the ACK/NAK transmission and the modulation order to constrain a constellation size of the ACK/NAK transmission embedded in a data channel based on the size of the ACK/NAK transmission, and the size of the ACK/NAK transmission is less than the modulation order so that constellation points are chosen to correspond to edges of a constellation; and decoding the received ACK/NAK transmission to determine whether to retransmit the packet to the at least one device.