Patent ID: 11923891
Assignee: DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A non-orthogonal multiple access (NOMA) multi-layer transmission method, comprising:
determining, by network equipment, a spread spectrum sequence group used by a terminal for NOMA multi-layer transmission, wherein the terminal is configured for the NOMA multi-layer transmission, the spread spectrum sequence group comprises N spread spectrum sequences, the N spread spectrum sequences correspond to N data layers, the N spread spectrum sequences are mutually orthogonal, N is a quantity of data layers of the NOMA multi-layer transmission, and N is an integer greater than 1; and
receiving, by the network equipment, data sent by the terminal, wherein the data comprises the N data layers using the spread spectrum sequence group for spreading, and during spreading the N data layers, different data layers use different spread spectrum sequences;
wherein the determining, by the network equipment, the spread spectrum sequence group used by the terminal for the NOMA multi-layer transmission comprises:
selecting, by the network equipment, a spread spectrum sequence group for the NOMA multi-layer transmission from a spread spectrum sequence pool for the terminal, wherein the spread spectrum sequence pool comprises M spread spectrum sequence groups, spread spectrum sequences in each of the M spread spectrum sequence groups are mutually orthogonal, and M is an integer greater than 1;
wherein the spread spectrum sequence pool comprises 48 spread spectrum sequence groups, each of the 48 spread spectrum sequence groups comprises two mutually orthogonal spread spectrum sequences, and each of the two spread spectrum sequences comprises four vector elements; and
wherein the spread spectrum sequence pool is shown in a table as follows:, Spread

spectrum

sequence

group

number
Spread spectrum sequence

1
1
  i
−1
−i

1
−i
−1
  i

2
1
−1
  1
−1

1
−1
−1
  1

3
1
−1
−i
  i

1
−1
  i
−i

4
1
  i
−i
−1

1
−i
  i
−1

5
1
  i
−i
  i

0
  1
  0
−1

6
1
−1
  1
  i

1
  0
−1
  0

7
1
  i
  0
−1

1
−i
−1
  0

8
1
  0
  i
−1

0
  1
−i
−1

9
1
−i
  i
−i

1
−1
−i
  1

10
1
−1
  1
−i

1
  i
−1
  1

11
1
  0
−1
  i

0
  1
  i
−1

12
1
−i
  0
  i

1
  i
−1
  0

13
0
  1
−1
  1

1
  i
  0
−i

14
1
−1
  1
  0

1
  0
−1
−i

15
1
  0
−i
−1

1
  0
  i
  0

16
1
−i
  0
−1

0
  1
  0
  i

17
1
−i
−1
  1

1
  1
  i
−1

18
1
−1
  i
  1

1
  i
−1
−1

19
1
  0
  0
−1

1
−1
  0
  1

20
1
  1
−i
−1

0
  0
  1
  i

21
1
−i
−1
−1

0
  1
  i
  0

22
1
  1
  0
−1

1
  0
−1
  1

23
1
  0
−1
−1

1
  i
  1
  0

24
1
  i
  i
−1

0
  1
  0
−i

25
1
  i
−1
  i

1
−i
  1
  i

26
1
  i
  1
−i

1
−i
−1
−i

27
1
  0
−i
  0

1
−1
  i
  0

28
1
−i
−i
−1

1
  i
  0
  0

29
1
−i
  0
  0

0
  0
  1
−i

30
0
  1
−i
  0

0
  1
  i
  1

31
0
  1
−i
  1

1
−i
  1
  0

32
0
  1
  i
−i

1
−1
  0
−i

33
0
  1
−1
−i

1
−i
−i
  0

34
1
  i
−i
  0

1
  0
  i
−i

35
1
−1
−i
  0

0
  1
−i
  i

36
1
  i
−i
  1

1
−i
  i
  1

37
0
  1
−1
  i

1
  i
  i
  0

38
1
−i
  i
  0

0
  1
  1
−i

39
1
−1
  1
  1

1
  1
−1
  1

40
1
−1
  i
−1

1
  1
−1
  i

41
1
  i
  1
−1

1
−i
  i
  i

42
1
−i
  1
−1

1
−1
−1
−i

43
1
−1
−i
−1

1
  i
  i
−i

44
1
  1
−i
  0

0
  1
  i
  i

45
0
  1
−i
−i

1
  1
  i
  0

46
1
  1
  i
−i

1
−1
−i
−i

47
0
  1
  1
  i

0
  1
−1
  0

48
1
−1
  0
  0

0
  0
  1
−1.