Symbol-group based spreading schemes

A method for wireless communication, comprising:

• transmitting, by a network node, an indication of a first set of N sequences, wherein each of the first set of N sequences is from an orthogonal spreading sequence set that comprises L sequences, wherein L is a spreading length, wherein N is a symbol-group length, and wherein each of the L sequences is of length L;
• transmitting, by the network node to a first terminal, the symbol-group length, the spreading length and an index of the orthogonal spreading sequence set in a first signaling message;
• transmitting, by the network node to the first terminal, a spreading sequence pattern indicator in a second signaling message, wherein a selection of the first set of N sequences is based on the spreading sequence pattern indicator;
• receiving, over a time and frequency resource and from the first terminal, a first spread signal comprising a first group of N data symbols spread using the first set of N sequences;
• and
• receiving, over the time and frequency resource and from a second terminal, a second spread signal comprising a second group of N data symbols spread using a second set of N sequences.

A wireless communications apparatus for wireless communication comprising a processor, wherein the processor is configured to:

• transmit, by a terminal, a first spread signal that is generated by spreading a first group of N data symbols using a first set of N sequences,
• wherein N is a symbol-group length, wherein each of the first set of N sequences is from an orthogonal spreading sequence set that comprises L sequences, wherein L is a spreading length, and wherein each of the L sequences is of length L,
• wherein the symbol-group length, the spreading length and an index of the orthogonal spreading sequence set are received in a first signaling message, and
• wherein the first set of N sequences is selected based on a spreading sequence pattern indicator in a second signaling message received by the terminal.

A wireless communications apparatus for wireless communication comprising a processor, wherein the processor is configured to:

• transmit, by a network node, an indication of a first set of N sequences, wherein each of the first set of N sequences is from an orthogonal spreading sequence set that comprises L sequences, wherein L is a spreading length, wherein N is a symbol-group length, and wherein each of the L sequences is of length L;
• transmit, by the network node to a first terminal, the symbol-group length, the spreading length and an index of the orthogonal spreading sequence set in a first signaling message;
• transmit, by the network node to the first terminal, a spreading sequence pattern indicator in a second signaling message, wherein a selection of the first set of N sequences is based on the spreading sequence pattern indicator;
• receive, over a time and frequency resource and from the first terminal, a first spread signal comprising a first group of N data symbols spread using the first set of N sequences;
• and
• receive, over the time and frequency resource and from a second terminal, a second spread signal comprising a second group of N data symbols spread using a second set of N sequences.