Multi-layer resource spread multiple access with permuted power scaling and phase rotation

Patent metadata

Field	Value
Publication number	US-2019313402-A1
Application number	US-201916374553-A
Country	US
Kind code	A1
Filing date	Apr 3, 2019
Priority date	Apr 6, 2018
Publication date	Oct 10, 2019
Grant date	—

Abstract

Aspects of the disclosure relate to methods and an apparatus for transmitting a signal in a multi-layer hybrid resource spread multiple access (RSMA) system. A non-orthogonal multiple access (NOMA) user equipment (UE) demultiplexes a stream of bits into a plurality of layers, encodes each layer with a different coding rate, modulates each layer of encoded bits with a different modulation scheme, and spreads and scrambles each layer of modulated symbols with a different spreading code and a corresponding different scrambling code. Thereafter, the NOMA UE permutes the plurality of layers having spread and scrambled symbols into a plurality of interleaved layers, scales and phase rotates each interleaved layer with a different scaling factor and a corresponding different phase rotating factor, sums the scaled and phase rotated symbols, maps the summed symbols onto a set of allocated resources, and transmits the mapped symbols via the set of resources.

First claim

What is claimed is:

1 . A method operable at a non-orthogonal multiple access (NOMA) user equipment (UE) for transmitting a signal, the method comprising:
demultiplexing a stream of bits into a plurality of layers; encoding each layer of demultiplexed bits with a different coding rate; modulating each layer of encoded bits with a different modulation scheme to generate modulated symbols; permuting the plurality of layers having modulated symbols into a plurality of interleaved layers; scaling and phase rotating each interleaved layer of modulated symbols with a different scaling factor and a corresponding different phase rotating factor; summing the scaled and phase rotated symbols of the plurality of interleaved layers; and mapping the summed symbols onto a set of resources allocated to the NOMA UE.

2 . The method of claim 1 , further comprising spreading and scrambling each layer of modulated symbols with a different spreading code and a corresponding different scrambling code prior to the permuting of the plurality of layers into the plurality of interleaved layers.

3 . The method of claim 1 , further comprising spreading and scrambling the summed symbols with a spreading code and a scrambling code prior to the mapping of the summed symbols onto the set of resources.

4 . The method of claim 1 , wherein the set of resources is shared by another UE in a non-orthogonal manner.

5 . The method of claim 1 , wherein the stream of bits includes information bits from at least one of:
a physical uplink data channel; a physical uplink control channel; or a combination of the physical uplink data channel and the physical uplink control channel.

6 . The method of claim 5 , wherein the information bits are from different physical uplink channels and are demultiplexed onto different layers.

7 . The method of claim 5 , wherein the information bits are from a single physical uplink channel and are demultiplexed onto different layers according to quality of service (QoS) requirements of the single physical channel.

8 . The method of claim 1 , wherein the permuting of the plurality of layers into the plurality of interleaved layers is time-variant.

9 . The method of claim 1 , further comprising transmitting the mapped symbols via the set of resources.

10 . A non-orthogonal multiple access (NOMA) user equipment (UE) for transmitting a signal, comprising:
means for demultiplexing a stream of bits into a plurality of layers; means for encoding each layer of demultiplexed bits with a different coding rate; means for modulating each layer of encoded bits with a different modulation scheme to generate modulated symbols; means for permuting the plurality of layers having modulated symbols into a plurality of interleaved layers; means for scaling and phase rotating each interleaved layer of modulated symbols with a different scaling factor and a corresponding different phase rotating factor; means for summing the scaled and phase rotated symbols of the plurality of interleaved layers; and means for mapping the summed symbols onto a set of resources allocated to the NOMA UE.

11 . The NOMA UE of claim 10 , further comprising means for spreading and scrambling each layer of modulated symbols with a different spreading code and a corresponding different scrambling code, wherein each layer of modulated symbols is spread and scrambled prior to the permuting of the plurality of layers into the plurality of interleaved layers.

12 . The NOMA UE of claim 10 , further comprising means for spreading and scrambling the summed symbols with a spreading code and a scrambling code, wherein the summed symbols are spread and scrambled prior to the mapping of the summed symbols onto the set of resources.

13 . The NOMA UE of claim 10 , wherein the set of resources is shared by another UE in a non-orthogonal manner.

14 . The NOMA UE of claim 10 , wherein the stream of bits includes information bits from at least one of:
a physical uplink data channel; a physical uplink control channel; or a combination of the physical uplink data channel and the physical uplink control channel.

15 . The NOMA UE of claim 14 , wherein the information bits are from different physical uplink channels and are demultiplexed onto different layers.

16 . The NOMA UE of claim 10 , wherein the information bits are from a single physical uplink channel and are demultiplexed onto different layers according to quality of service (QoS) requirements of the single physical channel.

17 . The NOMA UE of claim 10 , wherein the means for permuting is configured to permute the plurality of layers into the plurality of interleaved layers in a time-variant manner.

18 . The NOMA UE of claim 10 , further comprising means for transmitting the mapped symbols via the set of resources.

19 . A non-orthogonal multiple access (NOMA) user equipment (UE) for transmitting a signal, comprising:
at least one processor; a transceiver communicatively coupled to the at least one processor; and a memory communicatively coupled to the at least one processor, wherein the at least one processor is configured to:
demultiplex a stream of bits into a plurality of layers,
encode each layer of demultiplexed bits with a different coding rate,
modulate each layer of encoded bits with a different modulation scheme to generate modulated symbols,
permute the plurality of layers having modulated symbols into a plurality of interleaved layers,
scale and phase rotate each interleaved layer of modulated symbols with a different scaling factor and a corresponding different phase rotating factor,
sum the scaled and phase rotated symbols of the plurality of interleaved layers, and
map the summed symbols onto a set of resources allocated to the NOMA UE.

20 . The NOMA UE of claim 19 , wherein the at least one processor is further configured to spread and scramble each layer of modulated symbols with a different spreading code and a corresponding different scrambling code prior to permuting the plurality of layers into the plurality of interleaved layers.

21 . The NOMA UE of claim 19 , wherein the at least one processor is further configured to spread and scramble the summed symbols with a spreading code and a scrambling code prior to mapping the summed symbols onto the set of resources.

22 . The NOMA UE of claim 19 , wherein the set of resources is shared by another UE in a non-orthogonal manner.

23 . The NOMA UE of claim 19 , wherein the stream of bits includes information bits from at least one of:
a physical uplink data channel; a physical uplink control channel; or a combination of the physical uplink data channel and the physical uplink control channel.

24 . The NOMA UE of claim 23 , wherein the information bits are from different physical uplink channels and are demultiplexed onto different layers.

25 . The NOMA UE of claim 23 , wherein the information bits are from a single physical uplink channel and are demultiplexed onto different layers according to quality of service (QoS) requirements of the single physical channel.

26 . The NOMA UE of claim 19 , wherein at least one processor is configured to permute the plurality of layers into the plurality of interleaved layers in a time-variant manner.

27 . The NOMA UE of claim 19 , wherein the at least one processor is further configured to transmit

Assignees

• Qualcomm Inc

Inventors

• Lei Jing
• Park Seyong
• Soriaga Joseph Binamira
• Bhushan Naga
• Ji Tingfang

Classifications

• H04W72/21 Primary

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04L5/0037

  Inter-user or inter-terminal allocation · CPC title

• H04L5/0042

  Intra-user or intra-terminal allocation · CPC title

• H04L5/0023 Primary

  Time-frequency-space · CPC title

• H04L27/20

  Modulator circuits; Transmitter circuits · CPC title