阅读说明：本技术 具有单载波波形数据信道的ofdm控制信道 (OFDM control channel with single carrier waveform data channel ) 是由 张晓霞 T.罗 J.蒙托霍 J.孙 S.耶拉马利 V.钱德 Z.范 O.O.阿沃尼伊奥 于 2020-05-18 设计创作，主要内容包括：本公开的各个方面一般涉及无线通信。在一些方面中,用户设备(UE)可以接收使用正交频分复用OFDM波形(310)的控制信道。UE可以发送或接收与控制信道相关联的使用单载波SC波形(320)的数据信道。提供了涉及所使用的信道的配置的许多其他方面。(Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a User Equipment (UE) may receive a control channel using an orthogonal frequency division multiplexing, OFDM, waveform (310). The UE may transmit or receive a data channel associated with a control channel using a single carrier SC waveform (320). Numerous other aspects relating to the configuration of the channels used are provided.)

1. A method of wireless communication performed by a User Equipment (UE), comprising:

receiving a control channel using an Orthogonal Frequency Division Multiplexing (OFDM) waveform; and

transmitting or receiving a data channel associated with the control channel, the data channel using a Single Carrier (SC) waveform.

2. The method of claim 1, wherein the control channel and the data channel use a same bandwidth part (BWP) configuration.

3. The method of claim 2, wherein the control channel and the data channel use a same bandwidth according to the same BWP configuration.

4. The method of claim 2, wherein the control channel and the data channel use a same active BWP according to the same BWP configuration.

5. The method of claim 1, wherein the data channel is associated with a rank 1 or a low modulation order.

6. The method of claim 1, wherein a same filtering configuration is used for the control channel and the data channel.

7. The method of claim 1, wherein no switching gaps are used between the control channel and the data channel except for a switching gap used to switch to an active bandwidth portion of the control channel and the data channel.

8. The method of claim 1, wherein the control channel uses a first bandwidth part (BWP) configuration and the data channel uses a second BWP configuration, wherein the first BWP configuration is for a narrower BWP than the second BWP configuration.

9. The method of claim 1, wherein a first filtering configuration is used for the control channel and a second filtering configuration is used for the data channel.

10. The method of claim 1, wherein the data channel is scheduled by the control channel using cross-slot scheduling.

11. The method of claim 1, wherein a non-zero gap exists between the control channel and the data channel.

12. The method of claim 1, wherein the control channel provides at least one of a multiple transmission time interval grant, a semi-persistent scheduling assignment, or a configuration grant for the data channel.

13. The method of claim 1, wherein the control channel is monitored using a reduced number of monitoring occasions.

14. The method of claim 13, wherein the data channel is associated with an indicator received separately from the control channel, the indicator indicating information for receiving the data channel.

15. The method of claim 14, wherein the information for receiving the data channel comprises at least one of a Modulation and Coding Scheme (MCS) for the data channel or an on-off indicator for the data channel.

16. The method of claim 14, wherein the indicator comprises a reference signal sequence.

17. The method of claim 14, wherein the indicator uses the SC waveform.

18. The method of claim 14, wherein the indicator is received as downlink control information on the data channel.

19. The method of claim 1, wherein the control channel is received as downlink control information on the data channel.

20. The method of claim 1, wherein the control channel and the data channel are in a new radio high frequency band above approximately 52.6 GHz.

21. A User Equipment (UE) 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 control channel using an Orthogonal Frequency Division Multiplexing (OFDM) waveform; and

transmitting or receiving a data channel associated with the control channel, the data channel using a Single Carrier (SC) waveform.

22. The UE of claim 21, wherein the control channel and the data channel use a same bandwidth part (BWP) configuration.

23. The UE of claim 21, wherein a same filtering configuration is used for the control channel and the data channel.

24. The UE of claim 21, wherein the control channel uses a first bandwidth part (BWP) configuration and the data channel uses a second BWP configuration, wherein the first BWP configuration is for a narrower BWP than the second BWP configuration.

25. The UE of claim 21, wherein a first filtering configuration is used for the control channel and a second filtering configuration is used for the data channel.

26. The UE of claim 21, wherein the data channel is associated with an indicator received separately from the control channel, the indicator indicating information for receiving the data channel, wherein the indicator uses the SC waveform.

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 User Equipment (UE), cause the one or more processors to:

receiving a control channel using an Orthogonal Frequency Division Multiplexing (OFDM) waveform; and

transmitting or receiving a data channel associated with the control channel, the data channel using a Single Carrier (SC) waveform.

28. The non-transitory computer-readable medium of claim 27, wherein the data channel is associated with an indicator received separately from the control channel, the indicator indicating information for receiving the data channel, wherein the indicator uses the SC waveform.

29. An apparatus for wireless communication, comprising:

means for receiving a control channel using an Orthogonal Frequency Division Multiplexing (OFDM) waveform; and

means for transmitting or receiving a data channel associated with the control channel, the data channel using a Single Carrier (SC) waveform.

30. The apparatus of claim 29, wherein the data channel is associated with an indicator received separately from the control channel, the indicator indicating information for receiving the data channel, wherein the indicator uses the SC waveform.

Technical Field

Aspects of the present disclosure relate generally to wireless communications, and to techniques and apparatus for an Orthogonal Frequency Division Multiplexing (OFDM) waveform control channel with a Single Carrier (SC) waveform data channel.

Background

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems 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 (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). A User Equipment (UE) may communicate with a Base Station (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, a BS may be referred to as a node B, gNB, an Access Point (AP), a Radio head, a Transmit Receive Point (TRP), a New Radio (NR) BS, a 5G node B, etc.

The above multiple access techniques have been adopted by various telecommunication standards to provide a common protocol enabling different user equipments to communicate on a municipal, national, regional or 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 support mobile broadband internet access by improving spectral efficiency, reducing costs, improving services, utilizing new spectrum, and better integrating with other open standards that use Orthogonal Frequency Division Multiplexing (OFDMA) with a Cyclic Prefix (CP) on the Downlink (DL) (CP-OFDMA), CP-OFDMA and/or SC-FDM on the Uplink (UL) (e.g., also known as discrete fourier transform spread OFDM (DFT-s-OFDM)), as well as supporting beamforming, Multiple Input Multiple Output (MIMO) antenna techniques, and carrier aggregation. However, with the continuous increase in the demand for mobile broadband access, there is a need for further improvements in LTE and NR technologies. 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 of wireless communication performed by a User Equipment (UE) may include: receiving a control channel using an Orthogonal Frequency Division Multiplexing (OFDM) waveform; and transmitting or receiving a data channel associated with the control channel, the data channel using a Single Carrier (SC) waveform.

In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to receive a control channel using an OFDM waveform; and transmitting or receiving a data channel associated with the control channel, the data channel using an SC waveform.

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 UE, may cause the one or more processors to receive a control channel using an OFDM waveform; and transmitting or receiving a data channel associated with the control channel, the data channel using an SC waveform.

In some aspects, an apparatus for wireless communication may comprise means for receiving a control channel using an OFDM waveform; and means for transmitting or receiving a data channel associated with the control channel, the data channel using an SC waveform.

Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and processing systems as generally described with reference to and as illustrated by the accompanying figures and description.

The foregoing has outlined rather broadly the features and technical advantages of an example in accordance with 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 features of the concepts disclosed herein, both as to their organization and method of operation, together with related advantages, will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purpose 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, 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 is a block diagram conceptually illustrating an example of a base station communicating with a UE in a wireless communication network, in accordance with various aspects of the present disclosure.

Fig. 3 is a diagram illustrating an example of a control channel using an OFDM waveform and a corresponding data channel using an SC waveform, in accordance with various aspects of the present disclosure.

Fig. 4 is a diagram illustrating an example of a bandwidth portion configuration for an OFDM waveform control channel and an SC waveform data channel in accordance with various aspects of the present disclosure.

Fig. 5 is a diagram illustrating another example of bandwidth portion configurations for an OFDM waveform control channel and an SC waveform data channel in accordance with various aspects of the present disclosure.

Fig. 6 is a diagram illustrating another example of bandwidth portion configurations for an OFDM waveform control channel and an SC waveform data channel in accordance with various aspects of the present disclosure.

Fig. 7 is a diagram illustrating an example process performed, for example, by a user device, in accordance with various aspects of the present disclosure.

Detailed Description

Various aspects of the disclosure are described more fully hereinafter 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: the apparatus or method is practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the disclosure set forth herein. It should be understood that any aspect of the 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 are 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 may be described herein using terms commonly associated with 3G and/or 4G wireless technologies, aspects of the present disclosure may be applied to other generation-based communication systems, such as 5G and beyond communication systems, including NR technologies.

Fig. 1 is a diagram illustrating a wireless network 100 in which aspects of the present disclosure may be practiced. The wireless network 100 may be an LTE network or some other wireless network, such as a 5G or NR network. Wireless network 100 may include a plurality of BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A BS is an entity that communicates with User Equipment (UE) and may also be referred to as a base station, NR BS, node B, gNB, 5G node b (nb), access point, Transmission Reception Point (TRP), etc. Each BS may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" can refer to the coverage of a BS and/or a BS subsystem serving the coverage area, depending on the context in which the term is used.

A 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 home) and may allow restricted access by UEs associated 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, BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102 c. A BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "node B", "5G NB", and "cell" may be used interchangeably herein.

In some aspects, the cells may not necessarily be fixed, and the geographic area of the cells may move according to the location of the mobile BS. In some aspects, the BSs may be interconnected to each other and/or to one or more other BSs or network nodes (not shown) in the wireless network 100 by various types of backhaul interfaces (such as direct physical connections, virtual networks, etc.) using any suitable transport network.

Wireless network 100 may also include relay stations. A relay station is an entity that can receive data transmissions from an upstream station (e.g., a BS or a UE) and send data transmissions to a downstream station (e.g., a UE or a BS). The relay station may also be a UE that can relay transmissions for other UEs. In the example shown in fig. 1, relay station 110d may communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120 d. The relay station may also be referred to as a relay BS, a relay base station, a relay, etc.

The wireless network 100 may be a heterogeneous network including different types of BSs, such as macro BSs, pico BSs, femto BSs, relay BSs, and the like. These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in wireless network 100. For example, the macro BS may have a higher transmit power level (e.g., 5 to 40 watts), while the pico BS, femto BS, and relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

A network controller 130 may be coupled to the set of BSs and may provide coordination and control for these BSs. The network controller 130 may communicate with the BSs via a backhaul. The BSs may also communicate with each other, directly or indirectly, e.g., via a wireless or wired backhaul.

UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout wireless network 100, and each UE may be fixed or mobile. A UE may also be referred to as an access terminal, mobile station, subscriber unit, station, etc. A UE may be a cellular phone (e.g., a smartphone), a Personal Digital Assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop, a cordless phone, a Wireless Local Loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biosensor/device, a wearable device (a smartwatch, a smartgarment, smartglasses, a smartwristband, smartjewelry (e.g., a smartring, a smartbracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle-mounted component or sensor, a smartmeter/sensor, industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

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, 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. For example, a wireless node may provide a connection for or to a network (e.g., a wide area network such as the internet or a cellular network) 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). UE 120 may be included within a housing that houses components of UE 120, such as a processor component, a memory component, and the like.

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. The frequencies may also be referred to as carriers, frequency 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 certain aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using base station 110 as an intermediary to communicate with each other) using one or more sidelink channels. For example, the UE 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, vehicle-to-all (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, etc.), mesh networks, and so forth. In this case, UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by base station 110.

As noted above, fig. 1 is provided as an example. Other examples may be different than that described with respect to fig. 1.

Fig. 2 shows a block diagram of a design 200 of base station 110 and UE 120, where base station 110 and UE 120 may be one of the base stations and one of the UEs in fig. 1. The base station 110 may be equipped with T antennas 234a through 234T and the UE 120 may be equipped with R antennas 252a through 252R, where T ≧ 1 and R ≧ 1.

At base station 110, transmit processor 220 may receive data for one or more UEs from a data source 212, select one or more Modulation and Coding Schemes (MCSs) for each UE based at least in part on a Channel Quality Indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS(s) selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-Static Resource Partitioning Information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.) and provide overhead symbols and control symbols. Transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS)) and synchronization signals (e.g., Primary Synchronization Signals (PSS) and Secondary Synchronization Signals (SSS)). A Transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide T output symbol streams to T Modulators (MODs) 232a through 232T. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. T downlink signals from modulators 232a through 232T may be transmitted via T antennas 234a through 234T, respectively. According to various aspects described in more detail below, a synchronization signal may be generated with position coding to convey additional information.

At UE 120, antennas 252a through 252r may receive downlink signals from base station 110 and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254R, perform MIMO detection on the received symbols, if applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280. The channel processor may determine Reference Signal Received Power (RSRP), Received Signal Strength Indicator (RSSI), Reference Signal Received Quality (RSRQ), Channel Quality Indicator (CQI), and the like. In certain aspects, one or more components of UE 120 may be included in a housing.

On the uplink, at UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller/processor 280 (e.g., for reporting including RSRP, RSSI, RSRQ, CQI, etc.). Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to base station 110. At base station 110, the uplink signals from UE 120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by a MIMO detector 236 (if applicable), and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120. Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller/processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. Network controller 130 may include a communication unit 294, a controller/processor 290, and a memory 292.

Controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component of fig. 2 may perform one or more techniques associated with an OFDM waveform control channel with an SC waveform data channel, as described in more detail elsewhere herein. For example, controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component(s) of fig. 2 may perform or direct operations of, for example, process 700 of fig. 7 and/or other processes described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. A scheduler 246 may schedule UEs for data transmission on the downlink and/or uplink.

In some aspects, UE 120 may include means for receiving a control channel using an OFDM waveform, means for transmitting or receiving a data channel using an SC waveform associated with the control channel, and so on. In some aspects, such components may include one or more components of UE 120 described in conjunction with fig. 2.

As noted above, fig. 2 is provided as an example. Other examples may be different than that described with respect to fig. 2.

NR may use various frequency ranges. One frequency range considered for use in NR is frequency range 4, which may have a range of about 52GHz to about 114.25GHz, and which may use a licensed frequency band, an unlicensed frequency band, or a combination of licensed and unlicensed frequency bands.

In some aspects, the communication may use OFDM waveforms. OFDM waveforms may provide high spectral efficiency and may facilitate high-order multiple-input multiple-output (MIMO) operations to achieve high data rates. One example of an OFDM waveform is a CP-OFDM waveform. In some aspects, the communication may use SC waveforms. The SC waveform can reduce peak-to-average power ratio (PAPR) and thus improve coverage. Furthermore, the SC waveform may also enable time-domain implementations without forcing Fast Fourier Transform (FFT) or inverse FFT (ifft) operations. It may be difficult to implement SC waveforms for the control channel due to design challenges and incompatibility with existing approaches. However, the SC waveform may provide improved PAPR and simplify the time domain implementation of the data channel.

Some techniques and apparatus described herein use OFDM waveforms for control channels (e.g., Physical Downlink Control Channel (PDCCH)) and SC or OFDM waveforms for data channels (e.g., Physical Uplink Shared Channel (PUSCH), Physical Downlink Shared Channel (PDSCH), etc.). When an SC waveform is used for a data channel, the techniques and apparatus described herein provide a bandwidth part (BWP) configuration for the control channel (using the OFDM waveform) and the data channel (using the SC waveform). For example, some techniques and apparatus described herein use the same BWP configuration for the control channel and the data channel, while some techniques and apparatus described herein use different BWP configurations for the control channel and the data channel. Still further, some techniques and apparatus described herein provide for a two-step control channel procedure whereby resource allocation information is signaled in a first control channel (using an OFDM waveform) and other information for a data channel, a reference signal, or the data channel itself is signaled in a second control channel (e.g., using an SC waveform). Thus, compatibility between the OFDM waveform control channel and the SC waveform data channel is improved, coverage of the data channel is improved, and implementation is simplified relative to using an SC-based control channel.

Fig. 3 is a diagram illustrating an example 300 of a control channel using an OFDM waveform and a corresponding data channel using an SC waveform, in accordance with various aspects of the present disclosure. As shown, example 300 includes BS 110 and UE 120. The UEs 120 may include, for example, UEs 120 capable of communicating in frequency range 4, Standalone (SA) capable UEs 120, and so on.

As indicated by reference numeral 310, the BS 110 may transmit a control channel (e.g., PDCCH) to the UE 120 using an OFDM waveform. In some aspects, the control channel may identify a resource allocation for the data channel (illustrated by reference numeral 320). For example, the control channel may include a one-time resource allocation for a data channel, a semi-persistent scheduling (SPS) configuration for a data channel, a Configuration Grant (CG) for a data channel, and the like. In some aspects, UE 120 may receive the control channel in a high frequency band (e.g., a frequency range 4 band, a frequency band between approximately 52GHz and 115GHz, etc.).

In some aspects, UE 120 may perform initial access to access a network provided by BS 110 (not shown). For example, the UE 120 may receive a synchronization signal block on an initial bandwidth portion (BWP). The initial BWP may use OFDM waveforms and may use small FFT operations to manage UE complexity. The synchronization signal block may include configuration information indicating that the UE 120 is to move to broadband BWP. In some aspects, the configuration information may indicate whether UE 120 will use a CP-OFDM waveform for broadband BWP or an SC waveform for broadband BWP. For example, BS 110 may configure the UE to use the CP-OFDM waveform or the SC waveform based at least in part on a UE capability report indicating whether UE 120 is capable of using the CP-OFDM waveform or the SC waveform. In general, CP-OFDM waveforms may provide higher spectral efficiency and may support higher order MIMO operation relative to SC waveforms, which may provide reduced PAPR and lower complexity reception/transmission relative to CP-OFDM waveforms.

As indicated by reference numeral 320, the UE 120 may receive or transmit a data channel, such as a PUSCH or PDSCH. In this case, UE 120 receives or transmits a data channel using an SC waveform (e.g., based at least in part on a control channel indicating that UE 120 will use the SC waveform, based at least in part on UE 120 supporting the SC waveform, based at least in part on UE 120 being configured to use the SC waveform, etc.). Specific examples of BWP configurations for UE 120 and BS 110 when using SC waveforms are provided below in connection with fig. 4, 5 and 6. In some aspects, the UE 120 may be configured to use the OFDM waveform for a data channel, which is not further described herein.

As noted above, fig. 3 is provided as an example. Other examples may be different than that described with respect to fig. 3.

Fig. 4 is a diagram illustrating an example 400 of ds for an OFDM waveform control channel and an SC waveform data channel in accordance with various aspects of the present disclosure. In fig. 4, the horizontal axis represents frequency and the vertical axis represents time.

A control channel (e.g., the control channel illustrated by reference numeral 310 in fig. 3) is illustrated by reference numeral 410. The control channel may be transmitted using an OFDM waveform and span all or a subset of the current BWP. In some aspects, the control channel may be transmitted on a data channel as downlink control information or as a separate control channel. A data channel (e.g., the data channel illustrated by reference numeral 320 in fig. 3) is illustrated by reference numeral 420. The data channel may be transmitted using SC waveforms with DFT-s-OFDM implementations (i.e., DFT and IFFT-based implementations) as specified in LTE or NR uplink, so no additional guard subcarriers or guard bands may be used between the data channel and other communications (shown by the shaded rectangles). The data channel may use the SC waveform to achieve better PAPR than the OFDM waveform.

In some aspects, the control channel and the data channel may be associated with the same BWP configuration. For example, the control channel may occupy resource elements associated with a control resource set (CORESET) of an active BWP associated with a BWP configuration. In addition, the control channel may be transmitted on the same active BWP as the data channel. When the control channel and the data channel are transmitted on the same active BWP, no switching gap may be required between the control channel and the data channel. Furthermore, the same filtering configuration can be used for the control channel and the data channel, simplifying implementation and saving UE resources that would otherwise be used for switching the filtering configuration.

As noted above, fig. 4 is provided as an example. Other examples may be different than that described with respect to fig. 4.

Fig. 5 is a diagram illustrating another example 500 of a bandwidth portion configuration for an OFDM waveform control channel and an SC waveform data channel in accordance with various aspects of the present disclosure. In some aspects, the control channel may be associated with a smaller BWP configuration (e.g., associated with a narrower active BWP) than the data channel. This may reduce the implementation complexity of the OFDM waveform control channel while increasing the data rate of the data channel. In this case, different filtering may be used for the control channel and the data channel. In this case, cross-slot scheduling may be used for the data channel and/or a non-zero gap may be provided between the control channel and the data channel. Also in this case, a multiple Transmission Time Interval (TTI) grant, an SPS grant, or a CG may be used to reduce handover overhead for the UE 120.

The control channel is shown by reference numeral 510 and the data channel is shown by reference numeral 520. The horizontal direction represents time, and the vertical direction represents frequency. The subsequent control channel is shown by reference numeral 530. The switching operation between the BWP associated with the control channel and the BWP associated with the data channel is illustrated by reference numerals 540 and 550. In this case, the switching time may be non-zero, as described above.

As noted above, fig. 5 is provided as an example. Other examples may be different than that described with respect to fig. 5.

Fig. 6 is a diagram illustrating another example 600 of bandwidth portion configurations for an OFDM waveform control channel and an SC waveform data channel in accordance with various aspects of the disclosure. Fig. 6 shows an example in which a control channel, shown by reference numeral 610, provides resource allocation and other scheduling information for a data channel, shown by reference numeral 620. Further, the data channel is associated with an indicator shown by reference numeral 630. In some aspects, the control channel may be sent using a smaller BWP configuration (e.g., corresponding to a narrow active BWP) and the indicator and/or data channel may be sent using a larger BWP configuration (e.g., corresponding to a wide active BWP). In some aspects, the control channel may be monitored using a reduced number of monitoring occasions (e.g., the control channel may be monitored less frequently than in a baseline monitoring configuration), which may reduce a switching time between a BWP associated with the control channel and a BWP associated with the data channel (shown by reference numeral 640). Reference numeral 650 shows a subsequent data channel. As shown, between data channel 620 and data channel 650, UE 120 may not switch back to BWP for the control channel, thereby reducing latency and conserving resources of UE 120. For example, the UE 120 may receive or transmit the data channel 650 using a configuration indicated by an indicator associated with the data channel 650.

In some aspects, the indicator (illustrated by reference numeral 620) may include information for receiving a data channel. For example, the indicator may indicate a Modulation and Coding Scheme (MCS) for the data channel, an on-off indicator for the data channel, and the like. In some aspects, the indicator may be transmitted on a data channel as a reference signal (e.g., a demodulation reference signal (DMRS), etc.), Downlink Control Information (DCI), etc. In some aspects, the indicator may be transmitted using an SC waveform. In some aspects, the indicator may be based at least in part on a control channel. For example, resources for the indicator, modulation orders for the indicator, DCI formats of the control channel, etc. may be based at least in part on information provided in the control channel or a configuration of the control channel.

As noted above, fig. 6 is provided as an example. Other examples may be different than that described with respect to fig. 6.

Fig. 7 is a diagram illustrating an example process 700 performed, for example, by a user device, in accordance with various aspects of the present disclosure. The example process 700 is an example in which a UE (e.g., user equipment 120, etc.) performs operations associated with an OFDM control channel and an SC waveform data channel.

As shown in fig. 7, in some aspects, process 700 may include receiving a control channel using an Orthogonal Frequency Division Multiplexing (OFDM) waveform (block 710). For example, a user device (e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, etc.)) can receive a control channel using an OFDM waveform, as described above.

As further illustrated in fig. 7, in some aspects, process 700 may include transmitting or receiving a data channel associated with a control channel using a Single Carrier (SC) waveform (block 720). For example, the user equipment (e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, etc.) can transmit or receive data channels associated with control channels using SC waveforms, as described above.

Process 700 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 a first aspect, the control channel and the data channel use the same BWP configuration.

In a second aspect, either alone or in combination with the first aspect, the control channel and the data channel use the same bandwidth according to the same BWP configuration.

In a third aspect, either alone or in combination with one or more of the first and second aspects, the control channel and the data channel use the same active BWP according to the same BWP configuration.

In a fourth aspect, the data channel is associated with rank 1 or a low modulation order, either alone or in combination with one or more of the first to third aspects. For example, when the SC waveform is used for data transmission or reception, Quadrature Phase Shift Keying (QPSK) may be used instead of 16QAM or 64 QAM. In some aspects, a low modulation order may refer to QPSK or BPSK. In some aspects, a low modulation order may refer to a modulation order that is reduced relative to a configured or baseline modulation order for data transmission or reception.

In a fifth aspect, the same filtering configuration is used for the control channel and the data channel, alone or in combination with one or more of the first to fourth aspects.

In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, no switching gap is used between the control channel and the data channel except for the switching gap used to switch to the active bandwidth portion of the control channel and the data channel.

In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the control channel uses a first BWP configuration and the data channel uses a second BWP configuration. In some aspects, the first BWP configuration is for a narrower BWP than the second BWP configuration.

In an eighth aspect, the first filtering configuration is used for control channels and the second filtering configuration is used for data channels, alone or in combination with one or more of the first to seventh aspects.

In a ninth aspect, the data channel is scheduled by the control channel using cross-slot scheduling, alone or in combination with one or more of the first to eighth aspects.

In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, there is a non-zero gap between the control channel and the data channel.

In an eleventh aspect, the control channel provides at least one of a multiple transmission time interval grant, a semi-persistent scheduling assignment, or a configuration grant for the data channel, alone or in combination with one or more of the first through tenth aspects.

In a twelfth aspect, the control channel is monitored using a reduced number of monitoring occasions, alone or in combination with one or more of the first to eleventh aspects.

In a thirteenth aspect, the data channel is associated with an indicator received separately from the control channel, the indicator indicating information for receiving the data channel, alone or in combination with one or more of the first to twelfth aspects.

In a fourteenth aspect, the information for receiving the data channel comprises at least one of an MCS for the data channel or an on-off indicator for the data channel, alone or in combination with one or more of the first to thirteenth aspects.

In a fifteenth aspect, the indicator comprises a reference signal sequence, alone or in combination with one or more of the first to fourteenth aspects.

In a sixteenth aspect, the indicator uses an SC waveform, alone or in combination with one or more of the first to fifteenth aspects.

In a seventeenth aspect, the indicator is received as downlink control information on a data channel, alone or in combination with one or more of the first to sixteenth aspects.

In an eighteenth aspect, the control channel is received as downlink control information on a data channel, alone or in combination with one or more of the first to seventeenth aspects.

In a nineteenth aspect, the control channel and the data channel are in a new radio high frequency band above about 52.6GHz, alone or in combination with one or more of the first to eighteenth aspects.

Although fig. 7 shows example blocks of the process 700, in some aspects the process 700 may include additional blocks, fewer blocks, different blocks, or a different arrangement of blocks than those depicted in fig. 7. Additionally or alternatively, two or more of the blocks of process 700 may be performed in parallel.

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 the aspects.

As used herein, the term "component" is intended to be broadly interpreted as hardware, firmware, and/or a combination of hardware and software. As used herein, a processor is implemented in hardware, firmware, and/or a combination of hardware and software.

As used herein, meeting a threshold may refer to a value greater than the threshold, greater than or equal to the threshold, less than or equal to the threshold, not equal to the threshold, etc., depending on the context.

It will be apparent that the systems and/or methods described herein may be implemented in various forms of hardware, firmware, and/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 of these aspects. Thus, the operation and behavior of the systems and/or methods were described herein without reference to the specific software code-it being 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 the various aspects. Indeed, many of these features may be combined in ways not specifically recited in the claims and/or disclosed in the specification. Although each dependent claim listed below may be directly dependent on only one claim, the disclosure of the various aspects includes each dependent claim in combination 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 cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination of multiples of the same element (e.g., 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 any other ordering of 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 and unrelated items, etc.) and may be used interchangeably with "one or more. Where only one item is intended, the phrase "only 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.