CN-122003824-A - Flexible signaling to enable unequal modulation and multi-layer transmission in wireless communications

Abstract

Various schemes for flexible signaling to support unequal modulation and multi-layer transmission in wireless communications are described. A device (e.g., a work Station (STA)) generates a physical layer protocol data unit (PPDU) and performs transmission of the PPDU, signaling one or more of (1) whether the transmission employs unequal modulation (UEQM) or multi-layer coding (MLC) and unequal Modulation and Coding Scheme (MCS) levels (UEQ-MCS), (2) whether the transmission is for a single Physical Layer Convergence Procedure (PLCP) service data unit (PSDU) or multiple PSDUs per user, and (3) whether the transmission employs joint coding or independent coding.

Inventors

• HU SHENGQUAN
• LIU JIANHAN
• THOMAS EDWARD PARE JR.

Assignees

• 联发科技股份有限公司

Dates

Publication Date

20260508

Application Date

20240808

Priority Date

20230811

Claims (20)

1. 1. A method, comprising: Generating a physical layer protocol data unit by a processor of the device, and Performing, by the processor, a transmission of the physical layer protocol data unit and signaling one or more of: Whether the transmission employs an unequal modulation or multi-layer coding and a plurality of unequal modulation and coding scheme levels; whether the transmission is for a single physical layer convergence procedure service data unit or multiple physical layer convergence procedure service data units per user, and Whether the transmission employs a joint or independent coding.
2. 2. The method of claim 1 wherein the transmission comprises an unequal modulation transmission jointly encoded for the single physical layer convergence procedure service data unit for each user.
3. 3. The method of claim 2, wherein the performing of the transmission comprises performing the unequal modulation transmission on a resource unit or multiple resource unit basis.
4. 4. The method of claim 2, wherein the performing of the transmission comprises performing the unequal modulation transmission on a spatial stream basis.
5. 5. The method of claim 1, wherein the transmission comprises an unequal modulation and coding scheme level or unequal modulation transmission of independent codes of the physical layer convergence procedure service data units for each user.
6. 6. The method of claim 5 wherein the performing of the transmission includes performing the unequal modulation and coding scheme level or unequal modulation transmission on a resource unit or multiple resource unit basis.
7. 7. The method of claim 5 wherein the performing of the transmission includes performing the unequal modulation and coding scheme level or unequal modulation transmission on a spatial stream basis.
8. 8. The method of claim 1, wherein the signaling further indicates whether the transmission is based on resource units or multiple resource units or spatial streams.
9. 9. The method of claim 8, wherein the signaling further indicates a modulation and coding scheme level and a number of spatial streams: In case the transmission is based on resource units or multiple resource units and employs the unequal modulation or unequal modulation and coding scheme levels, each resource unit or multiple resource units, or In the case where the transmission is based on spatial streams and employs the unequal modulation or unequal modulation and coding scheme levels, each spatial stream.
10. 10. The method of claim 8, wherein the signaling further indicates a resource unit or a combination of multiple resource units for the unequal modulation or unequal modulation and coding scheme level.
11. 11. The method of claim 8 wherein the signaling further indicates the level of unequal modulation or unequal modulation and coding schemes for a single user transmission or an orthogonal frequency division multiple access multi-user transmission.
12. 12. The method of claim 8, wherein the signaling further indicates: a mixed bandwidth multi-user multiple input multiple output employing the unequal modulation or unequal modulation and coding scheme levels, and The unequal modulation or unequal modulation and coding scheme levels for ultra high reliability multi-user physical layer protocol data units for a downlink and for triggered physical layer protocol data units for an uplink.
13. 13. The method of claim 1, wherein the signaling further comprises using a common signal field of the physical layer protocol data unit to indicate one or more of: Whether the transmission employs an equal modulation or the unequal modulation or unequal modulation and coding scheme level; whether the transmission is based on resource units or multiple resource units or spatial streams, and One resource unit or a combination of multiple resource units.
14. 14. The method of claim 13 wherein a value of a physical layer protocol data unit type and compression mode subfield of the common signal field indicates whether the transmission is a single user transmission or a multi-user multiple input multiple output transmission.
15. 15. The method of claim 13, wherein a value of a punctured channel information subfield of the common signal field indicates the resource unit or combination of resource units for unequal modulation or unequal modulation and coding scheme level transmission on a resource unit or multiple resource units basis.
16. 16. The method of claim 1, wherein the signaling further comprises using a common field in an ultra high reliability signal field of the physical layer protocol data unit to indicate one or more of: Whether the transmission employs an equal modulation or the unequal modulation or unequal modulation and coding scheme level; whether the transmission is based on resource units or multiple resource units or spatial streams, and One resource unit or multiple resource unit combination option.
17. 17. The method of claim 16, wherein a value of an ignore subfield of the ultra-high reliability signal field indicates whether the transmission is performed on a resource unit or multiple resource units basis or a spatial stream basis.
18. 18. The method of claim 16, wherein a value of a number of non-orthogonal frequency division multiple access user subfields of the ultra-high reliability signal field indicates whether the transmission is an equal modulation for a single user or an unequal modulation or unequal modulation and coding scheme level for the single user.
19. 19. The method of claim 1, wherein the signaling further comprises using a user field in an ultra high reliability signal field of the physical layer protocol data unit to indicate one or more of: a modulation and coding scheme level; A number of spatial streams, and Whether the transmission employs the joint or independent coding.
20. 20. An apparatus, comprising: A transceiver configured to wirelessly transmit and receive, and A processor coupled to the transceiver and configured to perform operations comprising: Generating a physical layer protocol data unit, and Performing, by the transceiver, a transmission of the physical layer protocol data unit and signaling one or more of: Whether the transmission has an unequal modulation or multi-layer coding with multiple unequal modulation and coding scheme levels; whether the transmission is for a single physical layer convergence procedure service data unit or multiple physical layer convergence procedure service data units per user, and Whether the transmission has a joint coding or independent coding.

Description

Flexible signaling to enable unequal modulation and multi-layer transmission in wireless communications Cross reference The present disclosure is part of U.S. provisional patent application No. 63/518,964, filed on 8.11 of 2023, the contents of which are incorporated herein by reference in their entirety, claiming priority benefits. Technical Field The present disclosure relates generally to wireless communications, and more particularly to techniques related to flexible signaling to enable unequal modulation and multi-layer transmission in wireless communications. Background Unless otherwise indicated herein, the approaches described in this section are not prior art to the claims listed below and are not admitted to be prior art by inclusion in this section. In wireless communications, wi-Fi (or WiFi) and wireless local area networks (wireless local area networks; WLANs) conforming to one or more Institute of Electrical and Electronics Engineers (IEEE) ELECTRICAL AND Electronics Engineers, for example, performance and throughput improvements at different signal-to-interference-and-noise ratio (SINR) levels, quality of service (quality of service; qoS) enhancements, and latency reduction are key goals for the next generation Wi-Fi 8 ultra-high reliability (Ultra High Reliability; UHR) systems. Unequal modulation (unequal modulation; UEQM) and multi-layer coding/transmission (MLC) and unequal modulation and coding schemes (unequal modulation and coding scheme; UEQ-MCS) have been considered as potential enabling technologies to achieve Wi-Fi 8 targets. UEQM can be applied to physical-layer protocol data unit (physical-layer protocol data unit; PPDU) transmission, single physical-layer convergence procedure (physical-layer convergence procedure; PLCP) service data unit (SERVICE DATA unit; PSDU) and joint coding for each user. UEQM may be allocated on a frequency sub-block/Resource Unit (RU)/multiple RU (multi-RU; MRU) basis or on a spatial stream (SPATIAL STREAM; SS) basis, or both. Unequal MCS levels or MLCs (UEQ-MCS) or UEQM may be applied to PPDU transmission and independent/separate coding of multiple PSDUs per user. UEQ-MCS may also be scheduled on a frequency sub-block/RU/MRU basis or an SS basis, or both. However, how to enable UEQM or UEQ-MCS transmission and joint coding or independent coding for a single PSDU or multiple PSDUs per user remains to be defined. Thus, a flexible signaling solution is needed to achieve unequal modulation and multi-layer transmission in wireless communications. Disclosure of Invention The following summary is provided for purposes of illustration only and is not intended to be limiting in any way. That is, the following summary is intended to introduce a selection of concepts, benefits, and advantages of the novel and non-obvious techniques described herein. Selected embodiments will be further described in the following detailed description. Accordingly, the following summary is not intended to identify essential features of the claimed subject matter, nor is it intended to be used to determine the scope of the claimed subject matter. It is an object of the present disclosure to provide schemes, concepts, designs, techniques, methods and devices related to flexible signaling to enable unequal modulation and multi-layer transmission in wireless communications. Under the various proposed schemes described herein, the signaling method may be based on a universal signal field (U-SIG) and/or an extremely high throughput signal (EHT-SIG) or trigger frame format, as specified in IEEE 802.11 be. It is believed that implementation of the proposed solution solves or alleviates the above problems. In one aspect, a method may involve generating a PPDU. The method may also involve performing transmission of the PPDU and signaling one or more of (1) whether the transmission employs unequal modulation (UEQM) or multi-layer coding (MLC) and unequal modulation and coding scheme (UEQ-MCS), (2) whether the transmission employs a single PSDU or multiple PSDUs per user, and (3) whether the transmission employs joint coding or independent coding. In another aspect, an apparatus may include a transceiver and a processor coupled to the transceiver. The transceiver may be configured to transmit and receive wirelessly. The processor may be configured to generate a PPDU. The processor may also perform transmission of the PPDU and signal one or more of (1) whether the transmission employs unequal modulation (UEQM) or multi-layer coding (MLC) and unequal modulation and coding schemes (UEQ-MCS), (2) whether the transmission employs a single PSDU or multiple PSDUs per user, and (3) whether the transmission employs joint coding or independent coding. Notably, while the description provided herein may be in the context of certain radio access technologies, networks, and network topologies (e.g., wi-Fi), the proposed concepts, schemes, and any variants/derivatives thereof may be implemented in other type