Techniques and apparatus for multiplexing schemes for millimeter wave downlink single carrier waveforms
阅读说明:本技术 用于针对毫米波下行链路单载波波形的复用方案的技术和装置 (Techniques and apparatus for multiplexing schemes for millimeter wave downlink single carrier waveforms ) 是由 雷静 J·孙 T·卡道斯 于 2018-07-10 设计创作,主要内容包括:概括地说,本公开内容的某些方面涉及无线通信。更具体地,本公开内容的各方面提供了可以适用于单载波波形的复用方案。例如,本文描述的一些技术和装置允许对多个不同的数据流的复用,而不破坏波形的单载波属性。另外或替代地,本文描述的一些技术和装置可以提供作为复用方案的一部分的不均衡错误保护、不均衡带宽分配等。本文描述的复用方案的例子包括同相/正交(I/O)复用、至少部分地基于分层比特映射的叠加正交幅度调制(QAM)、利用叠加编码对QAM的极分复用、以及使用特定于UE的波束的频分复用(FDM)。(Certain aspects of the present disclosure generally relate to wireless communications. More specifically, aspects of the present disclosure provide multiplexing schemes that can be adapted to single carrier waveforms. For example, some of the techniques and apparatus described herein allow multiplexing of multiple different data streams without violating the single-carrier property of the waveform. Additionally or alternatively, some of the techniques and apparatus described herein may provide unequal error protection, unequal bandwidth allocation, and/or the like as part of a multiplexing scheme. Examples of multiplexing schemes described herein include in-phase/quadrature (I/O) multiplexing, superimposed Quadrature Amplitude Modulation (QAM) based at least in part on layered bit mapping, polar division multiplexing of QAM with superimposed coding, and Frequency Division Multiplexing (FDM) using UE-specific beams.)
1. A method of wireless communication performed by a transmitter device, comprising:
receiving a first data stream and a second data stream;
modulating the first data stream to produce a first modulated data stream;
modulating the second data stream to produce a second modulated data stream; and
multiplexing the first modulated data stream and the second modulated data stream into symbols using an in-phase carrier and a quadrature carrier.
2. The method of claim 1, wherein the transmitter device is further configured to: adding a first signature to the first data stream and a second signature to the second data stream,
wherein the first signature and the second signature are added for identification of a destination of the first data stream and the second data stream by at least one recipient device.
3. The method of claim 2, wherein the first signature and the second signature are added after channel coding of the first data stream and the second data stream.
4. The method of claim 1, wherein the modulation is amplitude modulation.
5. The method of claim 1, wherein the first data stream is associated with a first recipient device and the second data stream is associated with a second recipient device.
6. The method of claim 1, wherein the first data stream is associated with a first recipient device and a second recipient device,
wherein time division multiplexing is used to multiplex symbols associated with the first and second recipient devices for transmission.
7. A method of wireless communication performed by a recipient device, comprising:
receiving a signal having an in-phase component and a quadrature component;
identifying at least one symbol associated with the recipient device,
wherein the at least one symbol is identified from at least one of the in-phase component or the quadrature component; and
demodulating the at least one symbol.
8. The method of claim 7, wherein the at least one symbol is identified based at least in part on the at least one symbol being received on the one of the in-phase component or the quadrature component.
9. The method of claim 7, wherein the at least one symbol is identified based at least in part on a signature associated with the at least one symbol that is specific to the recipient device.
10. The method of claim 7, wherein the at least one symbol is identified from a plurality of symbols on the one of the in-phase component or the quadrature component,
wherein the at least one symbol is time division multiplexed with the plurality of symbols.
11. A transmitter device for wireless communication, comprising:
a memory; and
one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:
receiving a first data stream and a second data stream;
modulating the first data stream to produce a first modulated data stream;
modulating the second data stream to produce a second modulated data stream; and
multiplexing the first modulated data stream and the second modulated data stream into symbols using an in-phase carrier and a quadrature carrier.
12. The transmitter device of claim 11, wherein the transmitter device is further configured to: adding a first signature to the first data stream and a second signature to the second data stream,
wherein the first signature and the second signature are added for identification of a destination of the first data stream and the second data stream by at least one recipient device.
13. The transmitter device of claim 12, wherein the first signature and the second signature are added after channel coding of the first data stream and the second data stream.
14. The transmitter device of claim 11, wherein the modulation is amplitude modulation.
15. The transmitter device of claim 11, wherein the first data stream is associated with a first recipient device and the second data stream is associated with a second recipient device.
16. The transmitter device of claim 11, wherein the first data stream is associated with a first recipient device and a second recipient device,
wherein time division multiplexing is used to multiplex symbols associated with the first and second recipient devices for transmission.
17. A recipient device for wireless communication, comprising:
a memory; and
one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:
receiving a signal having an in-phase component and a quadrature component;
identifying at least one symbol associated with the recipient device,
wherein the at least one symbol is identified from at least one of the in-phase component or the quadrature component; and
demodulating the at least one symbol.
18. The receiver device of claim 17, wherein the at least one symbol is identified based at least in part on the at least one symbol being received on the one of the in-phase component or the quadrature component.
19. The recipient device of claim 17, wherein the at least one symbol is identified based at least in part on a signature associated with the at least one symbol that is specific to the recipient device.
20. The receiver device of claim 17, wherein the at least one symbol is identified from a plurality of symbols on the one of the in-phase component or the quadrature component,
wherein the at least one symbol is time division multiplexed with the plurality of symbols.
21. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising:
one or more instructions that, when executed by one or more processors of a transmitter device, cause the one or more processors to:
receiving a first data stream and a second data stream;
modulating the first data stream to produce a first modulated data stream;
modulating the second data stream to produce a second modulated data stream; and
multiplexing the first modulated data stream and the second modulated data stream into symbols using an in-phase carrier and a quadrature carrier.
22. The non-transitory computer-readable medium of claim 21, wherein the one or more instructions, when executed by the one or more processors, further cause the one or more processors to: adding a first signature to the first data stream and a second signature to the second data stream,
wherein the first signature and the second signature are added for identification of a destination of the first data stream and the second data stream by at least one recipient device.
23. The non-transitory computer-readable medium of claim 22, wherein the first signature and the second signature are added after channel encoding of the first data stream and the second data stream.
24. The non-transitory computer-readable medium of claim 21, wherein the modulation is amplitude modulation.
25. The non-transitory computer-readable medium of claim 21, wherein the first data stream is associated with a first recipient device and the second data stream is associated with a second recipient device.
26. The non-transitory computer-readable medium of claim 21, wherein the first data stream is associated with a first recipient device and a second recipient device,
wherein time division multiplexing is used to multiplex symbols associated with the first and second recipient devices for transmission.
27. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising:
one or more instructions that, when executed by one or more processors of a recipient device, cause the one or more processors to:
receiving a signal having an in-phase component and a quadrature component;
identifying at least one symbol associated with the recipient device,
wherein the at least one symbol is identified from at least one of the in-phase component or the quadrature component; and
demodulating the at least one symbol.
28. The non-transitory computer-readable medium of claim 27, wherein the at least one symbol is identified based at least in part on the at least one symbol being received on the one of the in-phase component or the quadrature component.
29. The non-transitory computer-readable medium of claim 27, wherein the at least one symbol is identified based at least in part on a signature associated with the at least one symbol that is specific to the recipient device.
30. The non-transitory computer-readable medium of claim 27, wherein the at least one symbol is identified from a plurality of symbols on the one of the in-phase component or the quadrature component,
wherein the at least one symbol is time division multiplexed with the plurality of symbols.
31. An apparatus for wireless communication, comprising:
means for receiving a first data stream and a second data stream;
means for modulating the first data stream to generate a first modulated data stream;
means for modulating the second data stream to produce a second modulated data stream; and
means for multiplexing the first modulated data stream and the second modulated data stream into symbols using an in-phase carrier and a quadrature carrier.
32. The apparatus of claim 31, further comprising: means for adding a first signature to the first data stream and a second signature to the second data stream,
wherein the first signature and the second signature are added for identification of a destination of the first data stream and the second data stream by at least one recipient device.
33. The apparatus of claim 32, wherein the first signature and the second signature are added after channel coding of the first data stream and the second data stream.
34. The apparatus of claim 31, wherein the modulation is amplitude modulation.
35. The apparatus of claim 31, wherein the first data stream is associated with a first recipient device and the second data stream is associated with a second recipient device.
36. The apparatus of claim 31, wherein the first data stream is associated with a first recipient device and a second recipient device,
wherein time division multiplexing is used to multiplex symbols associated with the first and second recipient devices for transmission.
37. An apparatus for wireless communication, comprising:
means for receiving a signal having an in-phase component and a quadrature component;
means for identifying at least one symbol associated with the apparatus,
wherein the at least one symbol is identified from at least one of the in-phase component or the quadrature component; and
means for demodulating the at least one symbol.
38. The apparatus of claim 37, wherein the at least one symbol is identified based at least in part on the at least one symbol being received on the one of the in-phase component or the quadrature component.
39. The apparatus of claim 37, wherein the at least one symbol is identified based at least in part on the apparatus-specific signature associated with the at least one symbol.
40. The apparatus of claim 37, wherein the at least one symbol is identified from a plurality of symbols on the one of the in-phase component or the quadrature component,
wherein the at least one symbol is time division multiplexed with the plurality of symbols.
Technical Field
Aspects of the present disclosure relate generally to wireless communications, and more specifically to techniques and apparatus for a multiplexing scheme for millimeter wave (mmwave) downlink Single Carrier (SC) waveforms.
Background
Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. A typical wireless communication system may employ multiple-access techniques capable of supporting communication with multiple users by sharing the available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access techniques include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE/LTE-advanced is an enhanced set of Universal Mobile Telecommunications System (UMTS) mobile standards promulgated by the third generation partnership project (3 GPP).
A wireless communication network may include a plurality of Base Stations (BSs) capable of supporting communication for a plurality of User Equipments (UEs). The UE may communicate with the BS via a downlink and an uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in greater detail herein, the BSs may be referred to as nodes B, gNB, Access Points (APs), radio heads, Transmit Receive Points (TRPs), New Radio (NR) BSs, 5G node BS, and so on.
The above multiple access techniques have been adopted in various telecommunication standards to provide a common protocol that enables different user equipments to communicate on a city, country, region and even global level. New Radios (NR), which may also be referred to as 5G, are an enhanced set of LTE mobile standards promulgated by the third generation partnership project (3 GPP). NR is designed to better integrate with other open standards by improving spectral efficiency, reducing costs, improving services, utilizing new spectrum, and using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) (CP-OFDM) on the Downlink (DL), CP-OFDM and/or SC-FDM (e.g., also known as discrete fourier transform spread OFDM (DFT-s-OFDM)) on the Uplink (UL), to better support mobile broadband internet access, and to support beamforming, multiple-input multiple-output (MIMO) antenna techniques, and carrier aggregation. However, as the demand for mobile broadband access continues to grow, there is a need for further improvements in LTE and NR technology. Preferably, these improvements should be applicable to other multiple access techniques and telecommunications standards employing these techniques.
Disclosure of Invention
In some aspects, a method for wireless communication performed by a transmitter device may comprise: receiving a first data stream and a second data stream; modulating the first data stream to produce a first modulated data stream; modulating the second data stream to produce a second modulated data stream; and multiplexing the first modulated data stream and the second modulated data stream into symbols using an in-phase carrier and a quadrature carrier.
In some aspects, a transmitter device for wireless communication may include memory and one or more processors configured to: receiving a first data stream and a second data stream; modulating the first data stream to produce a first modulated data stream; modulating the second data stream to produce a second modulated data stream; and multiplexing the first modulated data stream and the second modulated data stream into symbols using an in-phase carrier and a quadrature carrier.
In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a transmitter device, may cause the one or more processors to: receiving a first data stream and a second data stream; modulating the first data stream to produce a first modulated data stream; modulating the second data stream to produce a second modulated data stream; and multiplexing the first modulated data stream and the second modulated data stream into symbols using an in-phase carrier and a quadrature carrier.
In some aspects, an apparatus for wireless communication may comprise: means for receiving a first data stream and a second data stream; means for modulating the first data stream to generate a first modulated data stream; means for modulating the second data stream to produce a second modulated data stream; and means for multiplexing the first modulated data stream and the second modulated data stream into symbols using an in-phase carrier and a quadrature carrier.
In some aspects, a method for wireless communication performed by a recipient device may comprise: receiving a signal having an in-phase component and a quadrature component; identifying at least one symbol related to the recipient device (e.g., based at least in part on a preamble signature sequence specific to the recipient device), wherein the at least one symbol is identified from at least one of the in-phase component or the quadrature component; and demodulating the at least one symbol.
In some aspects, a receiver device for wireless communication may include memory and one or more processors configured to: receiving a signal having an in-phase component and a quadrature component; identifying at least one symbol related to the recipient device, wherein the at least one symbol is identified from at least one of the in-phase component or the quadrature component; and demodulating the at least one symbol.
In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a recipient device, may cause the one or more processors to: receiving a signal having an in-phase component and a quadrature component; identifying at least one symbol related to the recipient device, wherein the at least one symbol is identified from at least one of the in-phase component or the quadrature component; and demodulating the at least one symbol.
In some aspects, an apparatus for wireless communication may comprise: means for receiving a signal having an in-phase component and a quadrature component; means for identifying at least one symbol related to the recipient device, wherein the at least one symbol is identified from at least one of the in-phase component or the quadrature component; and means for demodulating the at least one symbol.
In some aspects, a method for wireless communication may comprise: receiving a plurality of data streams; mapping sets of data streams of the plurality of data streams to respective sets of bit layers of a plurality of bit layers, wherein each bit layer of the plurality of bit layers corresponds to a binary spread value generated based at least in part on a Quadrature Amplitude Modulation (QAM) constellation; and transmitting a signal including the plurality of bit layers.
In some aspects, a transmitter device for wireless communication may include memory and one or more processors configured to: receiving a plurality of data streams; mapping sets of data streams of the plurality of data streams to respective sets of bit layers of a plurality of bit layers, wherein each bit layer of the plurality of bit layers corresponds to a binary spread value generated based at least in part on a QAM constellation; and transmitting a signal including the plurality of bit layers. In some aspects, the signal may identify an assignment of bit layers for a user device or a recipient.
In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a recipient device, may cause the one or more processors to: receiving a plurality of data streams; mapping sets of data streams of the plurality of data streams to respective sets of bit layers of a plurality of bit layers, wherein each bit layer of the plurality of bit layers corresponds to a binary spread value generated based at least in part on a QAM constellation; and transmitting a signal including the plurality of bit layers.
In some aspects, an apparatus for wireless communication may comprise: means for receiving a plurality of data streams; means for mapping sets of data streams of the plurality of data streams to respective sets of bit layers of a plurality of bit layers, wherein each bit layer of the plurality of bit layers corresponds to a binary spread value generated based at least in part on a QAM constellation; and means for transmitting a signal including the plurality of bit layers.
In some aspects, a method for wireless communication performed by a recipient device may comprise: receiving a signal comprising a plurality of bit layers, wherein the plurality of bit layers are generated based at least in part on a QAM constellation; identifying at least one associated bit layer of the plurality of bit layers that is associated with the recipient device; and determining a data stream based at least in part on the at least one layer of relevant bits.
In some aspects, a receiver device for wireless communication may include memory and one or more processors configured to: receiving a signal comprising a plurality of bit layers, wherein the plurality of bit layers are generated based at least in part on a QAM constellation; identifying at least one associated bit layer of the plurality of bit layers that is associated with the recipient device; and determining a data stream based at least in part on the at least one layer of relevant bits.
In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a recipient device, may cause the one or more processors to: receiving a signal comprising a plurality of bit layers, wherein the plurality of bit layers are generated based at least in part on a QAM constellation; identifying at least one associated bit layer of the plurality of bit layers that is associated with the recipient device; and determining a data stream based at least in part on the at least one layer of relevant bits.
In some aspects, an apparatus for wireless communication may comprise: means for receiving a signal comprising a plurality of bit layers, wherein the plurality of bit layers are generated based at least in part on a QAM constellation; means for identifying at least one associated bit layer of the plurality of bit layers that is associated with the apparatus; and means for determining a data stream based at least in part on the at least one layer of relevant bits.
In some aspects, a method for wireless communication performed by a transmitter device may comprise: performing a modulation technique with respect to at least two data streams to generate at least two modulated data streams corresponding to the at least two data streams; applying respective polarization patterns to the at least two modulated data streams; and transmitting the at least two modulated data streams as a multiplexed signal after applying the respective polarization modes.
In some aspects, a transmitter device for wireless communication may include memory and one or more processors configured to: performing a modulation technique with respect to at least two data streams to generate at least two modulated data streams corresponding to the at least two data streams; applying respective polarization patterns to the at least two modulated data streams; and transmitting the at least two modulated data streams as a multiplexed signal after applying the respective polarization modes.
In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a transmitter device, may cause the one or more processors to: performing a modulation technique with respect to at least two data streams to generate at least two modulated data streams corresponding to the at least two data streams; applying respective polarization patterns to the at least two modulated data streams; and transmitting the at least two modulated data streams as a multiplexed signal after applying the respective polarization modes.
In some aspects, an apparatus for wireless communication may comprise: means for performing a modulation technique with respect to at least two data streams to generate at least two modulated data streams corresponding to the at least two data streams; means for applying respective polarization modes to the at least two modulated data streams; and means for transmitting the at least two modulated data streams as a multiplexed signal after applying the respective polarization modes.
In some aspects, a method for wireless communication performed by a recipient device may comprise: receiving a multiplexed signal comprising at least two modulated data streams associated with respective polarization modes, wherein the respective polarization modes are applied using respective polarized antennas of a transmitter device; and obtaining data from an associated one of the at least two modulated data streams, wherein at least one other of the at least two modulated data streams is filtered based at least in part on at least one of the respective polarization modes.
In some aspects, a receiver device for wireless communication may include memory and one or more processors configured to: receiving a multiplexed signal comprising at least two modulated data streams associated with respective polarization modes, wherein the respective polarization modes are applied using respective polarized antennas of a transmitter device; and obtaining data from an associated one of the at least two modulated data streams, wherein at least one other of the at least two modulated data streams is filtered based at least in part on at least one of the respective polarization modes.
In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a recipient device, may cause the one or more processors to: receiving a multiplexed signal comprising at least two modulated data streams associated with respective polarization modes, wherein the respective polarization modes are applied using respective polarized antennas of a transmitter device; and obtaining data from an associated one of the at least two modulated data streams, wherein at least one other of the at least two modulated data streams is filtered based at least in part on at least one of the respective polarization modes.
In some aspects, an apparatus for wireless communication may comprise: means for receiving a multiplexed signal comprising at least two modulated data streams associated with respective polarization modes, wherein the respective polarization modes are applied using respective polarized antennas of a transmitter device; and means for obtaining data from an associated one of the at least two modulated data streams, wherein at least one other of the at least two modulated data streams is filtered based at least in part on at least one of the respective polarization modes.
In some aspects, a method for wireless communication performed by a transmitter device may comprise: dividing a bandwidth into a plurality of non-overlapping sub-bands; assigning different ones of the plurality of non-overlapping sub-bands to different receiver devices; and forming a plurality of respective beams for the different receiver devices, wherein each beam of the plurality of respective beams occupies a respective subband of the different subbands assigned to the different receiver devices.
In some aspects, a transmitter device for wireless communication may include memory and one or more processors configured to: dividing a bandwidth into a plurality of non-overlapping sub-bands; assigning different ones of the plurality of non-overlapping sub-bands to different receiver devices; and forming a plurality of respective beams for the different receiver devices, wherein each beam of the plurality of respective beams occupies a respective subband of the different subbands assigned to the different receiver devices.
In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a transmitter device, may cause the one or more processors to: dividing a bandwidth into a plurality of non-overlapping sub-bands; assigning different ones of the plurality of non-overlapping sub-bands to different receiver devices; and forming a plurality of respective beams for the different receiver devices, wherein each beam of the plurality of respective beams occupies a respective subband of the different subbands assigned to the different receiver devices.
In some aspects, an apparatus for wireless communication may comprise: means for dividing a bandwidth into a plurality of non-overlapping sub-bands; means for assigning different ones of the plurality of non-overlapping sub-bands to different recipient devices; and means for forming a plurality of respective beams for the different receiver devices, wherein each beam of the plurality of respective beams occupies a respective subband of the different subbands assigned to the different receiver devices.
In some aspects, a method for wireless communication performed by a recipient device may comprise: transmitting information identifying a bandwidth capability of the recipient device to a transmitter device, wherein the bandwidth capability corresponds to a sub-band of a beam bandwidth of the transmitter device; and receiving a receiver device-specific beam from the transmitter device, wherein the receiver device-specific beam is receiver device-specific and occupies the subband, wherein the receiver device-specific beam is one of a plurality of non-overlapping receiver device-specific beams transmitted by the transmitter device in the band bandwidth.
In some aspects, a receiver device for wireless communication may include memory and one or more processors configured to: transmitting information identifying a bandwidth capability of the recipient device to a transmitter device, wherein the bandwidth capability corresponds to a sub-band of a beam bandwidth of the transmitter device; and receiving a receiver device-specific beam from the transmitter device, wherein the receiver device-specific beam is receiver device-specific and occupies the subband, wherein the receiver device-specific beam is one of a plurality of non-overlapping receiver device-specific beams transmitted by the transmitter device in the band bandwidth.
In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a recipient device, may cause the one or more processors to: transmitting information identifying a bandwidth capability of the recipient device to a transmitter device, wherein the bandwidth capability corresponds to a sub-band of a beam bandwidth of the transmitter device; and receiving a receiver device-specific beam from the transmitter device, wherein the receiver device-specific beam is receiver device-specific and occupies the subband, wherein the receiver device-specific beam is one of a plurality of non-overlapping receiver device-specific beams transmitted by the transmitter device in the band bandwidth.
In some aspects, an apparatus for wireless communication may comprise: means for transmitting information identifying a bandwidth capability of the apparatus to a transmitter device, wherein the bandwidth capability corresponds to a subband of a beam bandwidth of the transmitter device; and means for receiving an apparatus-specific beam from the transmitter device, wherein the apparatus-specific beam is apparatus-specific and occupies the subband, wherein the apparatus-specific beam is one of a plurality of non-overlapping apparatus-specific beams transmitted by the transmitter device in the beam bandwidth.
Aspects include, in general, methods, apparatuses, systems, computer program products, non-transitory computer-readable media, base stations, user equipment, wireless communication devices, transmitter devices, receiver devices, and processing systems as substantially described herein with reference to and as illustrated by the accompanying description and figures.
The foregoing has outlined rather broadly the features and technical advantages of the examples according to the present disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The nature of the concepts disclosed herein (both their organization and method of operation), together with the advantages associated therewith, will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purposes of illustration and description and is not intended as a definition of the limits of the claims.
Drawings
So that the manner in which the above recited features of the present disclosure can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to aspects, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only certain typical aspects of this disclosure and are therefore not to be considered limiting of its scope, for the description may admit to other equally effective aspects. The same reference numbers in different drawings may identify the same or similar elements.
Fig. 1 is a block diagram conceptually illustrating an example of a wireless communication network in accordance with various aspects of the present disclosure.
Fig. 2 illustrates a block diagram conceptually illustrating an example of a base station communicating with a User Equipment (UE) in a wireless communication network in accordance with various aspects of the disclosure.
Fig. 3 is a block diagram conceptually illustrating an example of a frame structure in a wireless communication network, in accordance with various aspects of the present disclosure.
Fig. 4 is a block diagram conceptually illustrating two example subframe formats with a normal cyclic prefix, in accordance with various aspects of the present disclosure.
Fig. 5 is a diagram illustrating an example of in-phase/quadrature multiplexing in accordance with various aspects of the present disclosure.
Fig. 6 is a diagram illustrating an example of superimposed Quadrature Amplitude Modulation (QAM) based at least in part on hierarchical bit mapping in accordance with various aspects of the present disclosure.
Fig. 7 is a diagram illustrating an example of polarization division multiplexing (polarization division multiplexing) for wireless communication, in accordance with various aspects of the present disclosure.
Fig. 8 is a diagram illustrating an example of Frequency Division Multiplexing (FDM) using UE-specific beamforming in accordance with various aspects of the present disclosure.
Fig. 9 is a diagram illustrating an example process performed, for example, by a base station, in accordance with various aspects of the disclosure.
Fig. 10 is a diagram illustrating an example process performed, for example, by a wireless communication device, in accordance with various aspects of the present disclosure.
Fig. 11 is a diagram illustrating an example process performed, for example, by a base station, in accordance with various aspects of the disclosure.
Fig. 12 is a diagram illustrating an example process performed, for example, by a wireless communication device, in accordance with various aspects of the present disclosure.
Fig. 13 is a diagram illustrating an example process performed, for example, by a base station, in accordance with various aspects of the disclosure.
Fig. 14 is a diagram illustrating an example process performed, for example, by a wireless communication device, in accordance with various aspects of the present disclosure.
Fig. 15 is a diagram illustrating an example process performed, for example, by a base station, in accordance with various aspects of the disclosure.
Fig. 16 is a diagram illustrating an example process performed, for example, by a wireless communication device, in accordance with various aspects of the present disclosure.
Detailed Description
A transmitter device (e.g., a base station or UE) may use a multiplexing scheme to generate signals for transmitting data to a receiver device (e.g., other base stations or UEs). For example, a transmitter device may combine data streams intended for one or more recipient devices into a single data stream or signal using a multiplexing scheme. Examples of multiplexing schemes may include Frequency Division Multiplexing (FDM) (e.g., where the system frequency spectrum is divided into non-overlapping subbands allocated to different users), Code Division Multiplexing (CDM) (e.g., where different users are assigned orthogonal or quasi-orthogonal spreading codes), Time Division Multiplexing (TDM) (e.g., where different users are scheduled to transmit in different time slots), and Space Division Multiplexing (SDM) (e.g., where different spatially separable antenna beams are formed for different users).
With the advent of 5G/NR, greater frequency bandwidth has been allocated, particularly for mm-wave transmission. Radio Frequency (RF) constraints and propagation properties that are unique to mm-waves may introduce new design challenges for cellular networks. One such design challenge is the use of Single Carrier (SC) waveforms. Compared to OFDM, SC waveforms have lower peak-to-average power ratio (PAPR), which results in benefits in terms of power efficiency, link budget enhancement, and low complexity design. However, conventional multiplexing schemes (e.g., TDM, CDM, FDM, SDM, etc.) may not be fully applicable to SC waveforms and/or may not provide sufficient flexibility with respect to unbalanced error protection, unbalanced bandwidth allocation, etc.
Some of the techniques and apparatus described herein provide multiplexing schemes that may be applied to SC waveforms. For example, some of the techniques and apparatus described herein allow multiplexing of multiple different data streams without violating the single-carrier property of the waveform. Additionally or alternatively, some of the techniques and apparatus described herein may provide unequal error protection, unequal bandwidth allocation, and/or the like as part of a multiplexing scheme. Examples of multiplexing schemes described herein include in-phase/quadrature (I/O) multiplexing, superposition QAM based at least in part on hierarchical bit mapping, polar-division multiplexing of QAM with superposition coding, and FDM using UE-specific beams, as described in conjunction with fig. 5, 6, 7, and 8, respectively. These multiplexing schemes may preserve SC waveforms while achieving unequal error protection, unequal bandwidth allocation, and the like.
Various aspects of the disclosure are described more fully below with reference to the accompanying drawings. This disclosure may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Based on the teachings herein one skilled in the art should appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the present disclosure. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. Moreover, the scope of the present disclosure is intended to cover such an apparatus or method implemented with other structure, functionality, or structure and functionality in addition to or other than the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein may be embodied by one or more elements of a claim.
Several aspects of a telecommunications system will now be presented with reference to various apparatus and techniques. These apparatus and techniques are described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, procedures, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.
It should be noted that although aspects are described herein using terms commonly associated with 3G and/or 4G wireless technologies, aspects of the present disclosure may be applied in other generation-based communication systems, such as 5G and beyond communication systems (including NR technologies).
Fig. 1 is a diagram illustrating a
The BS may provide communication coverage for a macrocell, a picocell, a femtocell, and/or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs having an association with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG)). The BS for the macro cell may be referred to as a macro BS. The BS for the pico cell may be referred to as a pico BS. The BS for the femto cell may be referred to as a femto BS or a home BS. In the example shown in fig. 1, BS110 a may be a macro BS for
In some examples, the cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of the mobile BS. In some examples, BSs may be interconnected to each other and/or to one or more other BSs or network nodes (not shown) in the
The
BS110 may include a
UE120 may include a
UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout
Some UEs may be considered Machine Type Communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, a robot, a drone, a remote device (e.g., a sensor, a meter, a monitor, a location tag, etc.), which may communicate with a base station, another device (e.g., a remote device), or some other entity. The wireless node may provide a connection to or to a network (e.g., a wide area network such as the internet or a cellular network), for example, via a wired or wireless communication link. Some UEs may be considered internet of things (IoT) devices and/or may be implemented as NB-IoT (narrowband internet of things) devices. Some UEs may be considered Customer Premises Equipment (CPE). UE120 may be included within a housing 120' that houses components of UE120, such as a processor component, a memory component, and so forth.
In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a particular RAT and may operate on one or more frequencies. A RAT may also be referred to as a radio technology, air interface, etc. Frequencies may also be referred to as carriers, channels, etc. Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.
In some examples, access to the air interface may be scheduled, where a scheduling entity (e.g., a base station) allocates resources for communication between some or all of the devices and apparatuses within a service area or cell of the scheduling entity. Within this disclosure, the scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities, as discussed further below. That is, for scheduled communications, the subordinate entity utilizes the resources allocated by the scheduling entity.
The base station is not the only entity that can be used as a scheduling entity. That is, in some examples, a UE may serve as a scheduling entity that schedules resources for one or more subordinate entities (e.g., one or more other UEs). In this example, the UE is acting as a scheduling entity, while other UEs utilize resources scheduled by the UE for wireless communication. The UE may serve as a scheduling entity in a peer-to-peer (P2P) network and/or in a mesh network. In the mesh network example, in addition to communicating with the scheduling entity, the UEs may optionally communicate directly with each other.
Thus, in a wireless communication network having scheduled access to time-frequency resources and having a cellular configuration, a P2P configuration, and a mesh configuration, a scheduling entity and one or more subordinate entities may communicate utilizing the scheduled resources.
As noted above, fig. 1 is provided by way of example only. Other examples are possible and may differ from the example described with respect to fig. 1.
Fig. 2 shows a block diagram of a design of
At
At UE120,
On the uplink, at UE120, a transmit
In some aspects, one or more components of UE120 may be included in a housing. Controllers/
In some aspects, a recipient device (e.g., UE 120) may include: means for receiving a signal having an in-phase component and a quadrature component; means for identifying at least one symbol related to the
In some aspects, a transmitter device (e.g., BS 110) may comprise: means for receiving a first data stream and a second data stream; means for modulating a first data stream to generate a first modulated data stream; means for modulating a second data stream to produce a second modulated data stream; means for multiplexing the first modulated data stream and the second modulated data stream into symbols using in-phase and quadrature carriers; means for adding a first signature to a first data stream and a second signature to a second data stream; means for receiving a plurality of data streams; means for mapping sets of data streams of a plurality of data streams to respective sets of bit layers of a plurality of bit layers; means for transmitting a signal comprising a plurality of bit layers; means for assigning respective sets of bit layers to one or more entities associated with a plurality of data streams; means for performing a modulation technique with respect to at least two data streams to generate at least two modulated data streams corresponding to the at least two data streams; means for applying respective polarization modes to at least two modulated data streams; means for transmitting the at least two modulated data streams as multiplexed signals after applying the respective polarization modes; means for dividing a bandwidth into a plurality of non-overlapping sub-bands; means for assigning different ones of a plurality of non-overlapping sub-bands to different receiver devices; means for forming a plurality of respective beams for different recipient devices; and so on. In some aspects, these units may include one or more components of BS110 described in conjunction with fig. 2.
As noted above, fig. 2 is provided as an example only. Other examples are possible and may differ from the example described with respect to fig. 2.
Fig. 3 illustrates an
Although some techniques are described herein in connection with frames, subframes, slots, etc., the techniques may be equally applicable to other types of wireless communication structures, which may be referred to in the 5G NR using terms other than "frame," "subframe," "slot," etc. In some aspects, a wireless communication structure may refer to a periodic, time bounded communication unit defined by a wireless communication standard and/or protocol.
In some telecommunications (e.g., LTE), a BS may transmit Primary Synchronization Signals (PSS) and Secondary Synchronization Signals (SSS) on the downlink in the center of the system bandwidth for each cell supported by the BS. As shown in fig. 3, the PSS and SSS may be sent in
In other systems (e.g., such NR or 5G systems), the node B may transmit these signals or other signals at these or different locations of the subframe. Additionally or alternatively, the node B may use a different multiplexing scheme, e.g., the multiplexing scheme described elsewhere herein.
As noted above, fig. 3 is provided as an example only. Other examples are possible and may differ from the example described with respect to fig. 3.
Fig. 4 shows two example subframe formats 410 and 420 with a normal cyclic prefix. The available time-frequency resources may be divided into resource blocks. Each resource block may cover 12 subcarriers in one slot and may include multiple resource elements. Each resource element may cover one subcarrier in one symbol period and may be used to transmit one modulation symbol, which may be real or complex valued.
Publicly available under the designation "Evolved Universal Radio Access (E-UTRA); PSS, SSS, CRS and PBCH in LTE are described in 3GPP technical specification 36.211 of Physical Channels and Modulation ".
An interlace may be used for each of the downlink and uplink for FDD in certain telecommunication systems (e.g., LTE). For example, Q interlaces may be defined with indices of 0 through Q-1, where Q may be equal to 4, 6, 8, 10, or some other value. Each interlace may include subframes spaced apart by Q frames. Specifically, interlace Q may include subframe Q, Q + Q, Q +2Q, etc., where Q ∈ { 0., Q-1 }.
The wireless network may support hybrid automatic repeat request (HARQ) for data transmission on the downlink and uplink. For HARQ, a transmitter (e.g., a BS) may send one or more transmissions of a packet until the packet is decoded correctly by a receiver (e.g., a UE) or some other termination condition is encountered. For synchronous HARQ, all transmissions of a packet may be sent in subframes of a single interlace. For asynchronous HARQ, each transmission of a packet may be sent in any subframe.
The UE may be located within the coverage of multiple BSs. One of the BSs may be selected to serve the UE. The serving BS may be selected based at least in part on various criteria (e.g., received signal strength, received signal quality, path loss, etc.). The received signal quality may be quantified by a signal-to-noise-plus-interference ratio (SINR), or a Reference Signal Received Quality (RSRQ), or some other metric. The UE may operate in a dominant interference scenario, where the UE may observe high interference from one or more interfering BSs.
Although aspects of the examples described herein may be associated with LTE technology, aspects of the disclosure may be applied with other wireless communication systems (e.g., NR or 5G technologies).
A New Radio (NR) may refer to a radio configured to operate according to a new air interface (e.g., in addition to an Orthogonal Frequency Division Multiple Access (OFDMA) -based air interface) or a fixed transport layer (e.g., in addition to an Internet Protocol (IP)). In aspects, NR may utilize OFDM with CP (referred to herein as cyclic prefix OFDM or CP-OFDM) and/or SC-FDM on the uplink, CP-OFDM may be utilized on the downlink, and support for half-duplex operation using Time Division Duplex (TDD) is included. In aspects, the NR may utilize OFDM with CP on the uplink (referred to herein as CP-OFDM) and/or discrete fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM), for example, may utilize CP-OFDM on the downlink and include support for half-duplex operation using TDD. NR may include enhanced mobile broadband (eMBB) services targeting wide bandwidths (e.g., 80 megahertz (MHz) and greater), millimeter wave (mmW) services targeting high carrier frequencies (e.g., 60 gigahertz (GHz)), massive MTC (MTC) services targeting non-backward compatible MTC technologies, and/or mission critical targeting ultra-reliable low latency communication (URLLC) services.
A single component carrier bandwidth of 100MHz may be supported. The NR resource blocks may span 12 subcarriers having a subcarrier bandwidth of 75 kilohertz (kHz) in a 0.1ms duration. Each radio frame may include 50 subframes having a length of 10 ms. Thus, each subframe may have a length of 0.2 ms. Each subframe may indicate a link direction (e.g., DL or UL) for data transmission, and the link direction for each subframe may be dynamically switched. Each subframe may include DL/UL data as well as DL/UL control data. The UL and DL subframes for NR may be as described in more detail below with respect to fig. 7 and 8.
Beamforming may be supported and beam directions may be dynamically configured. MIMO transmission with precoding may also be supported. MIMO configuration in DL may support up to 8 transmit antennas, with multi-layer DL transmitting up to 8 streams and up to 2 streams per UE. Multi-layer transmission with up to 2 streams per UE may be supported. Aggregation of multiple cells with up to 8 serving cells may be supported. Alternatively, the NR may support a different air interface than the OFDM-based interface. The NR network may comprise entities such as central units or distributed units.
The RAN may include a Central Unit (CU) and Distributed Units (DU). An NR BS (e.g., a gNB, a 5G node B, a transmission reception point (TPR), an Access Point (AP)) may correspond to one or more BSs. The NR cell may be configured as an access cell (ACell) or a data cell only (DCell). For example, a Radio Access Network (RAN) (e.g., a central unit or a distributed unit) may configure a cell. The DCell may be a cell used for carrier aggregation or dual connectivity, but not for initial access, cell selection/reselection, or handover. In some cases, the DCell may not transmit a synchronization signal. In some cases, the DCell may transmit a synchronization signal. The NR BS may transmit a downlink signal indicating a cell type to the UE. Based at least in part on the cell type indication, the UE may communicate with the NR BS. For example, the UE may determine an NR BS to consider for cell selection, access, handover, and/or measurement based at least in part on the indicated cell type.
As noted above, fig. 4 is provided as an example. Other examples are possible and may differ from the example described with respect to fig. 4.
Fig. 5 is a diagram illustrating an example 500 of in-phase/quadrature multiplexing in accordance with various aspects of the present disclosure. For purposes of fig. 5, it is assumed that a transmitter device (e.g., BS 110) is performing the operations shown in example 500. In some aspects, another device (e.g., UE 120) may perform one or more (or all) of the operations shown in example 500.
As shown in fig. 5 and by reference numeral 505, a transmitter device may receive a first data stream for UE a (e.g., a recipient device (e.g., UE 120)) and may receive a second data stream for UE B (e.g., another recipient device). In some aspects, the first data stream and/or the second data stream may be received from a higher layer of the transmitter device (e.g., after processing the first data stream and/or the second data stream), from an external source, and/or the like. In some aspects, a data stream may include a set of bits of information to be used to form a respective symbol or portion of a symbol. In some aspects, UE a may be a different UE than UE B. Additionally or alternatively, UE a and UE B may be the same UE. For example, the first data stream and the second data stream may be different data streams destined for the same UE. In some aspects, the first data stream and/or the second data stream may be for a device other than the UE. Aspects described herein are not limited to multiplexing of data destined for a UE.
As indicated by reference numeral 510, a transmitter device may perform channel coding on a first data stream and a second data stream. For example, the transmitter device may add a Cyclic Redundancy Check (CRC), error detection code, and the like. In some aspects, the transmitter device may perform rate matching to increase or decrease the code rate of the first data stream and/or the second data stream.
As indicated by reference numeral 515, the transmitter device may insert a signature associated with the UEA into the first data stream after performing channel coding on the first data stream. The signature associated with UE a may include any information identifying or associated with UE a. In some aspects, the transmitter device may add the signature prior to the encoded data set of the bitstream. In some aspects, the transmitter device may add the signature after the encoded data set of the bitstream. As indicated by reference numeral 520, the transmitter device may insert a signature associated with UE B into the second data stream after performing channel coding on the second data stream. The signature associated with UE B may include any information identifying or associated with UE B. The UE a and/or UE B may use the respective signatures to identify a symbol, codeword, or set of bits associated with the UE a and/or UE B.
As indicated by reference numeral 525, the transmitter device may apply amplitude modulation to the first data stream and the second data stream. Accordingly, the transmitter device may generate a modulated first data stream and a modulated second data stream. In some aspects, a transmitter device may perform QAM on a first data stream and a second data stream.
As indicated by reference numeral 530, the transmitter device may multiplex the amplitude modulated data stream into single carrier QAM (SC-QAM) symbols using an in-phase carrier and a quadrature carrier. Here, an orthogonal carrier is used for the second data stream (represented by the product of the second data stream and j). Thus, in-phase/quadrature (I/Q) multiplexed SC-QAM symbols are generated from the first data stream and the second data stream. The I/Q multiplexed SC-QAM symbols may preserve the SC properties of the waveform, which may improve the PAPR of the waveform and thus improve the downlink performance of the transmitter device. As indicated by reference numeral 535, the transmitter device may perform pulse shaping and/or may transmit SC-QAM symbols. By performing pulse shaping, the transmitter device may further improve the SC performance of the waveform.
In some aspects, a transmitter device may use TDM in conjunction with I/Q multiplexing to multiplex data streams for more than two UEs. As an example, for a
As noted above, fig. 5 is provided as an example. Other examples are possible and may differ from the example described with respect to fig. 5.
Fig. 6 is a diagram illustrating an example 600 of superposition QAM based at least in part on hierarchical bit maps in accordance with various aspects of the present disclosure. For purposes of fig. 6, it is assumed that a transmitter device (e.g., BS 110) is performing the operations shown in example 600. In some aspects, another device (e.g., UE 120) may perform one or more (or all) of the operations shown in example 600.
Fig. 6 depicts the mapping of data streams to bit layers, where the bit layers are generated using a binary expansion of a hierarchical QAM constellation. For example, mm-wave channels can be approximated by binary unfolding of hierarchical QAM constellations due to the high penetration loss and quasi-optical propagation of mm-waves. For the sake of illustration, it is assumed that the transmitter device transmits a layered constellation S with M different layers. Each layer may be associated with a respective power level based at least in part on the I and/or Q components forming each layer. For example, the amplitude levels on the I and/or Q components may be shown or approximated by the following equation:
wherein Dm∈{-1,1}
In the above equation, the hierarchical QAM constellation S includes
As a more specific example, consider a hierarchical 64-QAM constellation. 6Each constellation point of the 4-QAM constellation X may be composed of a two-dimensional array [ X [ ]IXQ]To indicate. XIAnd XQRepresenting the projection of X on the in-phase (I) and quadrature (Q) branches, respectively. Furthermore, there are 8 different amplitude levels on both the I and Q branches of the 64-QAM constellation X. By binary expansion, these 8 amplitude levels can be represented by the following equations, respectively:
wherein B isI(m) ± 1 and
wherein B isQ(n)=±1。
For the I branch, these 8 amplitude levels may be mapped to a value of [ B ]I(0) BI(1) BI(2)]A set of three bit layers is given. Similarly, for the Q branch, these 8 amplitude levels may be mapped to a value of [ B ]Q(0) BQ(1) BQ(2)]Another set of three bit layers is given. Thus, there are a total of 3+ 3-6 bit layers available for multiplexing. The transmitter device may assign each UE a different combination of one or more bit layers depending on channel feedback, QoS requirements, etc., as described in more detail below.
As shown in fig. 6 and by
As indicated by
In some aspects, a transmitter device may assign a bit layer based at least in part on a traffic type. For example, control data (e.g., PDCCH, Physical Uplink Control Channel (PUCCH), etc.) may be assigned to a more reliable bit layer or a bit layer associated with a higher power level than traffic data (e.g., payload data, PDSCH, Physical Uplink Shared Channel (PUSCH), etc.). This may be performed for the same UE or for different UEs. When two or more bit layers are assigned, the bit layers may or may not be adjacent to each other. In some aspects, the bit layer may be assigned based at least in part on a throughput function or utility function. For example, the transmitter device can maximize a throughput function or utility function by assigning a bit layer based at least in part on channel feedback, QoS requirements, power level of the bit layer, and the like.
As indicated by
As indicated by
As indicated by
In this way, the transmitter device may multiplex multiple different data streams using different bit layers of a hierarchical QAM constellation. By using different bit layers to generate the symbols, the SC properties of the transmitted waveform are preserved. Further, unequal error protection for a plurality of different data streams is achieved based at least in part on different transmission power levels of the bit layer. These operations may be performed for a shared channel (e.g., a data channel, PDSCH, PUSCH, etc.), a control channel (e.g., PDCCH, PUCCH, etc.), and/or a mix or combination of shared and control channels.
As noted above, fig. 6 is provided as an example. Other examples are possible and may differ from the example described with respect to fig. 6.
Fig. 7 is a diagram illustrating an example 700 of polarization division multiplexing for wireless communication in accordance with various aspects of the present disclosure. For purposes of fig. 7, assume that the operations of example 700 are performed by a transmitter device (e.g., BS 110). In some aspects, another device (e.g., UE 120) may perform one or more (or all) of the operations shown in example 700.
As shown in fig. 7 and by
As indicated by
In some aspects, a transmitter device may transmit data streams for a plurality of different UEs using a single polarization mode. In this case, the transmitter device may use superposition coding to multiplex data streams for multiple different UEs. For example, a transmitter device may use a first superposition level for a first data stream of a first recipient device (e.g., UE 120) and may use a second superposition level for a second data stream of a second recipient device. In such a case, the transmitter device may assign the first level and/or the second level based at least in part on the data stream and/or the recipient device. For example, the transmitter device may assign a more resilient level for higher priority data streams, may assign a level with a higher data rate for higher bandwidth data streams, and so on.
In some aspects, a transmitter device may perform polar division multiplexing for at least two data streams (e.g., 3 data streams, 4 data streams, 5 data streams, 6 data streams, etc.). For example, the transmitter device may use a different polarization mode for each of the at least two data streams. Additionally or alternatively, the transmitter device may use superposition coding to multiplex two or more data streams within the same polarization pattern. In this way, data for multiple different data streams may be multiplexed within a single polarization mode or using multiple different polarization modes. Further, by multiplexing data streams using polar division multiplexing (e.g., as compared to OFDM), the transmitter apparatus can maintain the single-carrier property of the waveform.
As noted above, fig. 7 is provided as an example. Other examples are possible and may differ from the example described with respect to fig. 7.
Fig. 8 is a diagram illustrating an example 800 of FDM using UE-specific beamforming in accordance with various aspects of the present disclosure. For purposes of fig. 8, assume that the operations of example 800 are performed by a transmitter device (e.g., BS 110). In some aspects, another device (e.g., UE 120) may perform one or more (or all) of the operations shown in example 800.
As shown in fig. 8 and by
In some aspects, a transmitter device may partition bandwidth based at least in part on a capability or configuration of a recipient device (e.g., UE 120). For example, a UE (e.g., a low-end UE, a Machine Type Communication (MTC) UE, etc.) may not have the capability to access the entire bandwidth of a downlink communication channel of a transmitter device. In this case, the transmitter device may divide the bandwidth of the downlink communication channel so that the UE may use a portion of the bandwidth that the UE is capable of using. The transmitter device may then assign other portions of the bandwidth for other UEs and may form UE-specific beams for the UE and the other UEs that reduce overflow and interference between downlink signals associated with the UE and downlink signals associated with the other UEs.
As indicated by
As indicated by
As noted above, fig. 8 is provided as an example. Other examples are possible and may differ from the example described with respect to fig. 8.
Fig. 9 is a diagram illustrating an
As shown in fig. 9, in some aspects,
As shown in fig. 9, in some aspects,
As shown in fig. 9, in some aspects,
With respect to the
In some aspects, the transmitter device is further configured to: adding a first signature to the first data stream and a second signature to the second data stream, wherein the first signature and the second signature are added for identification of destinations of the first data stream and the second data stream by at least one decoding device. In some aspects, the first signature and the second signature are added after channel coding of the first data stream and the second data stream. In some aspects, the first signature and the second signature are added after channel coding of the first data stream and the second data stream. In some aspects, the modulation is amplitude modulation. In some aspects, the first data stream is associated with a first recipient device and the second data stream is associated with a second recipient device. In some aspects, a first data stream is associated with a first receiver device and a second receiver device, and symbols associated with the first receiver device and the second receiver device are multiplexed for transmission using time division multiplexing.
Although fig. 9 shows example blocks of the
Fig. 10 is a diagram illustrating an
As shown in fig. 10, in some aspects,
As shown in fig. 10, in some aspects,
As shown in fig. 10, in some aspects,
With respect to
Although fig. 10 shows example blocks of the
Fig. 11 is a diagram illustrating an example process 1100 performed, for example, by a transmitter device, in accordance with various aspects of the disclosure. Example process 1100 is an example in which a transmitter device (e.g., BS 110) performs superposition QAM based at least in part on hierarchical bit mapping.
As shown in fig. 11, in some aspects, process 1100 may include: a plurality of data streams is received (block 1110). For example, a transmitter device (e.g., using antennas 234, DEMOD 232,
As shown in fig. 11, in some aspects, process 1100 may include: a set of data streams of the plurality of data streams is mapped to a respective set of bit layers of a plurality of bit layers, wherein each bit layer of the plurality of bit layers corresponds to a binary spread value generated based at least in part on a QAM constellation (block 1120). For example, the transmitter device (e.g., using controller/
As shown in fig. 11, in some aspects, process 1100 may include: a signal including a plurality of bit layers is transmitted (block 1130). For example, a transmitter device may transmit a signal that includes multiple bit layers. In some aspects, a transmitter device may determine symbols using a QAM constellation and based at least in part on mapping a data stream to a bit layer, and may transmit a signal identifying the symbols.
With respect to process 1100, in some aspects, process 1100 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in conjunction with one or more other processes described elsewhere herein.
In some aspects, a plurality of bit layers are associated with a plurality of corresponding transmission power levels, and a respective set of bit layers is assigned to one or more entities based at least in part on a respective transmission power level of the plurality of corresponding transmission power levels associated with the respective set of bit layers. In some aspects, a transmitter device may assign respective sets of bit layers to one or more entities associated with multiple data streams. In some aspects, respective sets of bit layers are assigned based at least in part on channel feedback associated with one or more entities. In some aspects, respective sets of bit layers are assigned based at least in part on one or more quality of service requirements associated with one or more entities. In some aspects, the respective bit-layer sets are associated with respective reliability levels, and the respective bit-layer sets are assigned based at least in part on the respective reliability levels. In some aspects, the respective bit layer sets are assigned based at least in part on a utility function or a throughput maximization function. In some aspects, respective sets of bit layers are assigned based at least in part on error protection requirements or priority levels associated with one or more entities. In some aspects, the transmitter device is configured to: at least one channel coding level for at least one of the plurality of data streams is determined based at least in part on an error protection requirement or a priority level. In some aspects, a particular bit layer associated with a highest reliability level or transmission power level is assigned for a particular data stream of the plurality of data streams associated with the control data. In some aspects, a first set of bit layers of the plurality of bit layers is assigned to a first receiver device and a second set of bit layers of the plurality of bit layers is assigned to a second receiver device, wherein the first set of bit layers has a different number of bit layers than the second set of bit layers.
Although fig. 11 shows example blocks of the process 1100, in some aspects the process 1100 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted in fig. 11. Additionally or alternatively, two or more of the blocks of process 1100 may be performed in parallel.
Fig. 12 is a diagram illustrating an
As shown in fig. 12, in some aspects,
As shown in fig. 12, in some aspects,
As shown in fig. 12, in some aspects,
With respect to
In some aspects, the at least one layer of related bits is identified based at least in part on a transmission power level of the at least one layer of related bits. In some aspects, the at least one associated bit layer includes at least two bit layers that are not adjacent to each other. In some aspects, the at least one bit layer is assigned based at least in part on a quality of service requirement, a priority level, or an error protection requirement of the recipient device.
Although fig. 12 shows example blocks of the
Fig. 13 is a diagram illustrating an
As shown in fig. 13, in some aspects,
As shown in fig. 13, in some aspects,
As shown in fig. 13, in some aspects,
With respect to
In some aspects, the modulation technique is a quadrature amplitude modulation technique. In some aspects, a particular data stream of the at least two data streams includes multiplexed data for a plurality of different wireless communication devices. In some aspects, the multiplexed data is multiplexed based at least in part on at least one of: a superposition quadrature amplitude modulation technique using hierarchical bit mapping or an in-phase/quadrature multiplexing technique. In some aspects, the respective polarization modes are applied using respective polarized antennas of the transmitter device.
Although fig. 13 shows example blocks of the
Fig. 14 is a diagram illustrating an
As shown in fig. 14, in some aspects,
As shown in fig. 14, in some aspects,
With respect to
In some aspects, the at least two modulated data streams are modulated using quadrature amplitude modulation. In some aspects, the related data streams include multiplexed data for a plurality of different recipient devices including the recipient device, and the recipient device is configured to extract the related data streams from the multiplexed data. In some aspects, the multiplexed data is multiplexed based at least in part on at least one of: a superposition quadrature amplitude modulation technique using hierarchical bit mapping or an in-phase/quadrature multiplexing technique.
Although fig. 14 shows example blocks of the
Fig. 15 is a diagram illustrating an
As shown in fig. 15, in some aspects,
As shown in fig. 15, in some aspects,
As shown in fig. 15, in some aspects,
With respect to
In some aspects, the sub-band of the different sub-bands assigned to a particular receiver device of the different receiver devices corresponds to a maximum bandwidth capability of the particular receiver device. In some aspects, the plurality of respective beams are formed using user equipment-specific beamforming.
Although fig. 15 shows example blocks of the
Fig. 16 is a diagram illustrating an
As shown in fig. 16, in some aspects,
As shown in fig. 16, in some aspects,
With respect to
Although fig. 16 shows example blocks of the
The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit aspects to the precise form disclosed. Modifications and variations are possible in light of the above disclosure or may be acquired from practice of various aspects.
As used herein, the term component is intended to be broadly interpreted as hardware, firmware, or a combination of hardware and software. As used herein, a processor is implemented in hardware, firmware, or a combination of hardware and software.
Some aspects are described herein in connection with a threshold. As used herein, satisfying a threshold may refer to a value greater than a threshold, greater than or equal to a threshold, less than or equal to a threshold, not equal to a threshold, and so forth.
It will be apparent that the systems and/or methods described herein may be implemented in various forms of hardware, firmware, or combinations of hardware and software. The actual specialized control hardware or software code used to implement the systems and/or methods is not limiting in every respect. Thus, the operation and behavior of the systems and/or methods have been described herein without reference to the specific software code; it is to be understood that software and hardware may be designed to implement the systems and/or methods based, at least in part, on the description herein.
Although particular combinations of features are recited in the claims and/or disclosed in the specification, these combinations are not intended to limit the disclosure of possible aspects. Indeed, many of these features may be combined in ways not specifically recited in the claims and/or specifically disclosed in the specification. Although each dependent claim listed below may refer directly to only one claim, the disclosure of possible aspects includes a combination of each dependent claim with every other claim in the set of claims. A phrase referring to "at least one of a list of items" refers to any combination of those items, including a single member. For example, "at least one of a, b, or c" is intended to encompass any combination of a, b, c, a-b, a-c, b-c, and a-b-c, as well as multiples of the same element (e.g., any other ordering of a, b, and c), a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b-b, b-b-c, c-c, and c-c-c, or a, b, and c).
No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. In addition, as used herein, the articles "a" and "an" are intended to include one or more items, and may be used interchangeably with "one or more. Further, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, unrelated items, combinations of related items and unrelated items, etc.) and may be used interchangeably with "one or more. Where only one item is intended, the term "one" or similar language is used. Further, as used herein, the terms "having," "has," "having," and the like are intended to be open-ended terms. Further, the phrase "based on" is intended to mean "based, at least in part, on" unless explicitly stated otherwise.
- 上一篇:一种医用注射器针头装配设备
- 下一篇:下载视听内容的方法和设备