Indicates the signal-to-noise ratio for downlink communications

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive from a base station in a first time slot an indication of a signal-to-noise ratio (SNR) mode to be used by the UE for one or more downlink communications in one or more time slots occurring after the first time slot, wherein different SNR modes in the multiple SNR modes support at least one of different modulation and coding schemes, different ranks, or a combination thereof; and operate using the SNR mode in the one or more time slots based at least in part on the indication. Numerous other aspects are provided.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 62 / 965,585, filed on January 24, 2020, entitled “INDICATING A SIGNAL TO NOISERATIO FOR DOWNLINK COMMUNICATION,” and U.S. Non-Provisional Patent Application No. 17 / 154,754, filed on January 21, 2021, entitled “INDICATING A SIGNAL TO NOISERATIO FOR DOWNLINK COMMUNICATION,” which are hereby expressly incorporated herein by reference.

[0003] Public domain

[0004] Aspects of the present disclosure relate generally to wireless communications and to techniques and apparatus for indicating a signal-to-noise ratio for downlink communications.

[0005] background

[0006] 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 technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies 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 a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0007] A wireless network may include several base stations (BSs) that can support communications for several 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, while the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, the BS may be referred to as a Node B, a gNB, an Access Point (AP), a Radio Head, a Transmit Receiving Point (TRP), a New Radio (NR) BS, a 5G Node B, and the like.

[0008] The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipment to communicate at the city, country, region, and even global level. NR (which may also be referred to as 5G) is an enhancement set to the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink (DL), using CP-OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), and supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation to improve spectrum efficiency, reduce costs, improve services, utilize new spectrum, and better integrate with other open standards. As the demand for mobile broadband access continues to grow, further improvements to LTE, NR and other radio access technologies are still useful.

[0009] Overview

[0010] In some aspects, a wireless communication method performed by a user equipment (UE) may include: receiving from a base station in a first time slot an indication of a signal-to-noise ratio (SNR) mode from a plurality of SNR modes to be used by the UE for one or more downlink communications in one or more time slots occurring after the first time slot, wherein different SNR modes from the plurality of SNR modes support at least one of different modulation and coding schemes, different ranks, or a combination thereof; and operating using the SNR mode in the one or more time slots based at least in part on the indication.

[0011] In some aspects, a wireless communication method performed by a base station may include: determining a modulation and coding scheme (MCS) and rank to be used for one or more downlink communications in one or more time slots; determining an SNR mode from multiple SNR modes to be indicated to a UE for the one or more downlink communications in the one or more time slots based at least in part on the MCS, the rank, or a combination thereof; and transmitting an indication of the SNR mode to the UE.

[0012] 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 from a base station in a first time slot an indication of an SNR mode of a plurality of SNR modes to be used by the UE for one or more downlink communications in one or more time slots occurring after the first time slot, wherein different SNR modes of the plurality of SNR modes support at least one of different modulation and coding schemes, different ranks, or a combination thereof; and operate using the SNR mode in the one or more time slots based at least in part on the indication.

[0013] In some aspects, a base station 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: determine an MCS and a rank to be used for one or more downlink communications in one or more time slots; determine an SNR mode of a plurality of SNR modes to be indicated to a UE for use in the one or more downlink communications in the one or more time slots based at least in part on at least one of the MCS, the rank, or a combination thereof; and transmit an indication of the SNR mode to the UE.

[0014] 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 from a base station in a first time slot an indication of an SNR mode of a plurality of SNR modes to be used by the UE for one or more downlink communications in one or more time slots occurring after the first time slot, wherein different SNR modes of the plurality of SNR modes support at least one of different modulation and coding schemes, different ranks, or a combination thereof; and operate using the SNR mode in the one or more time slots based at least in part on the indication.

[0015] 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 base station, may cause the one or more processors to: determine an MCS and a rank to be used for one or more downlink communications in one or more time slots; determine an SNR mode to be indicated to a UE for the one or more downlink communications in the one or more time slots based at least in part on the MCS, the rank, or a combination thereof; and transmit an indication of the SNR mode to the UE.

[0016] In some aspects, a device for wireless communications may include: a device for receiving, from a base station in a first time slot, an indication of an SNR mode from a plurality of SNR modes to be used by the device for one or more downlink communications in one or more time slots occurring after the first time slot, wherein different SNR modes from the plurality of SNR modes support at least one of different modulation and coding schemes, different ranks, or a combination thereof; and a device for operating using the SNR mode in the one or more time slots based at least in part on the indication.

[0017] In some aspects, an apparatus for wireless communications may include: a device for determining an MCS and a rank to be used for one or more downlink communications in one or more time slots; a device for determining an SNR mode from a plurality of SNR modes to be indicated to a UE for use for the one or more downlink communications in the one or more time slots based at least in part on the MCS, the rank, or a combination thereof; and a device for transmitting an indication of the SNR mode to the UE.

[0018] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as substantially described herein with reference to and as illustrated in the accompanying figures and specification.

[0019] The foregoing has broadly outlined the features and technical advantages of examples according to the present disclosure in an effort to make the following detailed description better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples can be easily used as a basis for modifying or designing other structures for implementing the same purpose as the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both in terms of their organization and method of operation, and the associated advantages will be better understood by considering the following description in conjunction with the accompanying drawings. Each of the accompanying drawings is provided for the purpose of illustration and description and is not intended to define limitations on the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to understand the above-stated features of the present disclosure in detail, the above briefly summarized content may be described in more detail with reference to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the accompanying drawings only illustrate certain typical aspects of the present disclosure and should not be considered to limit its scope, as the description may allow for other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0022] Figure 1 is a diagram illustrating an example of a wireless network according to the present disclosure.

[0023] Figure 2is a diagram illustrating an example in which a base station and a UE are in communication in a wireless network according to the present disclosure.

[0024] Figure 3 is a diagram illustrating an example of downlink communication according to the present disclosure.

[0025] Figure 4 and 5 is a diagram illustrating an example of indicating a signal-to-noise ratio for downlink communications according to the present disclosure.

[0026] Figure 6 is a diagram illustrating an example process performed, for example, by user equipment according to the present disclosure.

[0027] Figure 7 is a diagram illustrating an example process performed, for example, by a base station according to the present disclosure.

[0028] Detailed Description

[0029] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be implemented in many different forms and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. On the contrary, these aspects are provided to make the present disclosure thorough and complete, and it will fully convey the scope of the present disclosure to those skilled in the art. Based on the teachings of this article, those skilled in the art will appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether it is independently implemented or implemented in combination with any other aspect of the present disclosure. For example, any number of aspects set forth herein can be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods practiced using supplements or other other structures, functionality, or structures and functionality as the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein can be implemented by one or more elements of the claims.

[0030] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0031] It should be noted that while various aspects may be described herein using terminology generally associated with 5G or NR radio access technologies (RATs), various aspects of the present disclosure may be applied to other RATs, such as 3G RATs, 4G RATs, and / or RATs after 5G (e.g., 6G).

[0032] Figure 1 1 is a diagram illustrating an example of a wireless network 100 according to the present disclosure. The wireless network 100 may be a 5G (NR) network and / or an LTE network, etc. or may include elements thereof. The wireless network 100 may include several base stations 110 (shown as BS110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with a user equipment (UE) and may also be referred to as an NR BS, a B node, a gNB, a 5G B node (NB), an access point, a transmit receive point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0033] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, 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 associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown in , 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 102c. The BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "B node", "5G NB", and "cell" may be used interchangeably herein.

[0034] In some aspects, the cell may not necessarily be stationary, and the geographic area of ​​the cell may move depending on 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 via various types of backhaul interfaces, such as direct physical connections or virtual networks, using any suitable transport network.

[0035] The wireless network 100 may also include a relay station. A relay station is an entity that can receive transmissions of data from an upstream station (e.g., a BS or a UE) and send transmissions of the data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown in , relay BS 110d may communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay BS may also be referred to as a relay station, relay base station, relay, or the like.

[0036] The wireless network 100 may be a heterogeneous network including different types of BSs, such as a macro BS, a pico BS, a femto BS, a relay BS, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0037] A network controller 130 may be coupled to a set of BSs and may provide coordination and control of these BSs. The network controller 130 may communicate with each BS via a backhaul. The BSs may also communicate with each other directly or indirectly via a wireless or wired backhaul.

[0038] UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile. UEs may also be referred to as access terminals, terminals, mobile stations, subscriber units, stations, etc. A UE may be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, 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 biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0039] Some UEs may be considered as machine type communication (MTC) UEs, or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags, which may communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node may provide connectivity to or to a network (e.g., a wide area network (such as the Internet) or a cellular network) via, for example, a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as client equipment (CPE). UE120 may be included inside a housing that houses components of UE 120, such as a processor component and / or a memory component. In some aspects, a processor component and a memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., a memory) may be operationally coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0040] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific RAT and may operate on one or more frequencies. RAT may also be referred to as radio technology, air interface, etc. Frequency may also be referred to as carrier, frequency channel, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0041] In some 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, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols or vehicle-to-infrastructure (V2I) protocols), and / or mesh networks. 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.

[0042] The devices of the wireless network 100 can communicate using an electromagnetic spectrum, which can be subdivided into various categories, frequency bands, channels, etc. based on frequency or wavelength. For example, the devices of the wireless network 100 can communicate using an operating band having a first frequency range (FR1) and / or can communicate using an operating band having a second frequency range (FR2), the first frequency range (FR1) can span 410 MHz to 7.125 GHz, and the second frequency range (FR2) can span 24.25 GHz to 52.6 GHz. Frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to as a "sub-6 GHz" band. Similarly, FR2 is often referred to as a "millimeter wave" band, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as a "millimeter wave" band by the International Telecommunication Union (ITU). Therefore, unless otherwise specifically stated, it should be understood that the terms "sub-6 GHz" and the like, if used herein, may broadly refer to frequencies less than 6 GHz, frequencies within FR1, and / or mid-band frequencies (e.g., greater than 7.125 GHz). Similarly, unless otherwise specifically stated, it should be understood that the terms "millimeter wave" and the like, if used herein, may broadly refer to frequencies within the EHF band, frequencies within FR2, and / or mid-band frequencies (e.g., less than 24.25 GHz). It is contemplated that the frequencies included in FR1 and FR2 may be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0043] As indicated above, Figure 1 are provided as examples. Other examples may differ from those described herein. Figure 1 Examples described.

[0044] Figure 2 is a diagram illustrating an example 200 of a base station 110 and a UE 120 in communication in a wireless network 100 according to the present disclosure. 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 in general T≥1 and R≥1.

[0045] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) 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 the UE based at least in part on the MCS selected for each UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper layer signaling), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signals (PSS) or secondary synchronization signals (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where 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) 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. The T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.

[0046] At UE 120, antennas 252a to 252r may receive downlink signals from base station 110 and / or other base stations and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols where 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 term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and / or a channel quality indicator (CQI) parameter, etc. In some aspects, one or more components of the UE 120 may be included in the housing 284.

[0047] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the base station 110 via the communication unit 294.

[0048] Antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include, or may be included within, one or more antenna panels, antenna groups, antenna element sets, and / or antenna arrays, etc. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include one or more antenna elements. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include coplanar antenna element sets and / or non-coplanar antenna element sets. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include antenna elements within a single housing and / or antenna elements within multiple housings. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include antenna elements coupled to one or more transmission and / or reception components (such as Figure 2 One or more antenna elements of one or more components).

[0049] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI) from a controller / processor 280. The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, where applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to the base station 110. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 254) of the UE 120 may be included in a modem of the UE 120. In some aspects, the UE 120 includes a transceiver. The transceiver may include any combination of antenna(s) 252, modulator and / or demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller / processor 280) and memory 282 to perform aspects of any of the methods described herein, for example, as described with reference to Figure 6-7 as described.

[0050] At the base station 110, uplink signals from the UE 120 and other UEs may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236 where applicable, and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and the decoded control information to the 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. The base station 110 may include a scheduler 246 to schedule the UE 120 for downlink and / or uplink communications. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 232) of the base station 110 may be included in a modem of the base station 110. In some aspects, the base station 110 includes a transceiver. The transceiver may include any combination of antenna(s) 234, modulator and / or demodulator 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform aspects of any of the methods described herein, for example, as described with reference to Figure 6-7 as described.

[0051] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component(s) of the base station 110 may perform one or more techniques associated with indicating a signal-to-noise ratio (SNR) for downlink communications, as described in greater detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of the Figure 6 The process of 600 Figure 7 , and / or operations of other processes as described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include: a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, the one or more instructions, when executed (e.g., directly, or after compilation, conversion, and / or interpretation) by one or more processors of base station 110 and / or UE 120, may cause the one or more processors, UE 120, and / or base station 110 to perform or direct, for example Figure 6 The process of 600 Figure 7 In some aspects, executing instructions may include running instructions, converting instructions, compiling instructions, and / or interpreting instructions, etc.

[0052] In some aspects, UE 120 may include: means for receiving, from a base station in a first time slot, an indication of a signal-to-noise ratio (SNR) mode of a plurality of SNR modes to be used by the UE for one or more downlink communications in one or more time slots occurring after the first time slot, wherein different SNR modes of the plurality of SNR modes support at least one of different modulation and coding schemes, different ranks, or a combination thereof; means for operating using the SNR mode in the one or more time slots based at least in part on the indication; and so on. In some aspects, such means may include in conjunction with Figure 2 One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and the like.

[0053] In some aspects, the base station 110 may include: means for determining a modulation and coding scheme (MCS) and rank to be used for one or more downlink communications in one or more time slots; means for determining, based at least in part on at least one of the MCS, the rank, or a combination thereof, a signal-to-noise ratio (SNR) mode from a plurality of SNR modes to be indicated to a user equipment (UE) for one or more downlink communications in one or more time slots; means for transmitting an indication of the SNR mode to the UE; and the like. In some aspects, such means may include a combination of Figure 2 One or more components of base station 110 are depicted, such as antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and the like.

[0054] although Figure 2 The blocks in the 200 and 210 are illustrated as different components, but the functions described above with respect to these blocks may be implemented with a single hardware, software, or combined component or various combinations of components. For example, the functions described with respect to the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by or under the control of the controller / processor 280.

[0055] As indicated above, Figure 2 are provided as examples. Other examples may differ from those described herein. Figure 2 Examples described.

[0056] Figure 3 is a diagram illustrating an example 300 of downlink communications according to the present disclosure.

[0057] like Figure 3 As shown in , the time domain component of the downlink communication may include several consecutive time slots (shown as "Time Slot 1", "Time Slot 2", "Time Slot 3" and "Time Slot 4"). Each time slot may include a physical downlink control channel (PDCCH) for transmitting control information and a physical downlink shared channel (PDSCH) for transmitting data.

[0058] For example, as shown, slot 1 may include a first PDCCH 305 carrying downlink control information (DCI) 310 and a first PDSCH 315 carrying data 320. Slot 2 may include a second PDCCH 325 carrying DCI 330 and a second PDSCH 335 carrying data 340. Slot 3, slot 4, etc. may be similarly configured. The DCI 310 may schedule transmission of data 320 in the first PDSCH 315 and may include an indication 345 of a modulation and coding scheme (MCS), MIMO rank, etc. corresponding to the first PDSCH 315. Similarly, the DCI 330 may schedule transmission of data 340 in the second PDSCH 335 and may include an indication 350 of an MCS, MIMO rank, etc. corresponding to the second PDSCH 335.

[0059] The UE may be configured with hardware components and / or software processes that support enhanced communication capabilities (such as, greater sampling rates and greater numbers of component carriers). For example, the UE 120 may include hardware components of a receive chain and be configured with processes that support downlink communications in portions of the radio spectrum exceeding several GHz (e.g., millimeter wave (mmW) transmissions in 5G or NR, which may be communicated at frequencies of 28 GHz or higher) with relatively high accuracy and granularity.

[0060] Although the power consumption per bit in mmW cells is less than that of 5G-NR SUB6 or LTE, the bandwidth in mmW deployments can be approximately 5 to 10 times that of 5G-NR SUB6 or LTE, and therefore the total power consumption can be significantly greater. In a typical mmW 5G-NR scenario, the modulation and coding scheme (MCS) and rank combination are the same for all carriers in a slot. The first one or more symbols may contain only physical downlink control channel (PDCCH) transmissions. The SNR required to decode the PDCCH is low (e.g., less than 20 dB), and the SNR required to decode almost 90% of the communications is also low because in many cases the UE 120 is at the edge of the cell. However, to decode some downlink communications, an SNR of up to 35 dB may be required. This high SNR operation can be achieved using power-intensive hardware.

[0061] To facilitate power savings, UE 120 may be configured to operate in two or more different SNR modes, where different hardware configurations are used to decode data based at least in part on the SNR required to decode the data, which is based at least in part on the associated MCS and / or rank. As indicated above, the MCS and rank information for each time slot (from which the SNR requirement can be determined) is included in the DCI for that time slot.

[0062] Thus, an adaptive solution in which UE 120 switches to a different SNR mode based on information about the timeslot is not useful because changing the SNR mode requires activating or deactivating hardware components, which takes time. For example, if UE 120 determines an appropriate SNR mode based on indication 345 associated with data 320, UE 120 will have begun (and possibly completed) decoding data 320 before UE 120 has fully switched to the appropriate SNR mode. Furthermore, switching to a different SNR mode in the middle of a timeslot may be risky due to the effects of long transitions that may add non-linear performance degradation.

[0063] According to various aspects described herein, BS 110 can provide an indication of an SNR mode to be used for downlink communications in one or more time slots following a current time slot, thereby giving UE 120 time to activate an appropriate SNR mode, thereby achieving power savings where appropriate (e.g., using a lower SNR mode), and maintaining communication efficiency by selectively enabling a higher SNR mode that facilitates more accurate decoding. Some aspects of signaling described herein for indicating an SNR mode can achieve these power savings without increasing transmission overhead.

[0064] As indicated above, Figure 3 are provided as examples. Other examples may differ from those described herein. Figure 3 Examples described.

[0065] Figure 4 4 is a diagram illustrating an example 400 of indicating an SNR for downlink communications according to the present disclosure. Figure 4 As shown in FIG. 1 , BS 110 and UE 120 may communicate with each other.

[0066] As indicated by reference numeral 405, BS 110 may transmit, and UE 120 may receive, an indication of an SNR mode from among a plurality of SNR modes. The indication may be transmitted in a first time slot 410 and may indicate an SNR mode to be used by UE 120 for one or more downlink communications in one or more time slots (e.g., time slot n 415, time slot n+1 420, etc.) occurring after first time slot 410. In this manner, UE 120 may have time to switch to the indicated SNR mode before decoding communications to which the SNR mode applies.

[0067] The SNR mode may include an operating mode used by the UE 120 in decoding transmissions. The indication of the SNR mode may indicate a specified SNR to be used for decoding downlink communications, a specified SNR range, etc. In this manner, different SNR modes in the plurality of SNR modes support at least one of different MCSs, different ranks, etc. The BS 110 may determine an MCS and rank to be used for one or more downlink communications in one or more time slots (e.g., time slot n 415, time slot n+1 420, etc.), and determine the SNR mode based at least in part on at least one of the MCS, the rank, or a combination thereof.

[0068] In some aspects, multiple SNR modes may include two SNR modes: a low SNR mode and a high SNR mode. For example, the low SNR mode may correspond to less than 10 decibels (dB), and the high SNR mode may correspond to greater than 10dB. In some aspects, multiple SNR modes may include three or more SNR modes, each SNR mode corresponding to an SNR range. For example, multiple SNR modes may include four SNR modes. The first SNR mode may correspond to a range of 0-10dB, the second SNR mode may correspond to a range of 11-20dB, the third SNR mode may correspond to a range of 21-30dB, and the fourth SNR mode may correspond to greater than 31dB. In some aspects, depending on the hardware capabilities of UE 120, any number of different SNR modes may be used.

[0069] In some aspects, such as Figure 4 , an indication of the SNR mode to be used by the UE 120 is included in downlink control information (DCI) 430. For example, as shown, the indication of the SNR mode may include a single bit 425 in the DCI 430 for the first time slot 410. The bit 425 may indicate a first SNR mode (e.g., by using a value of "0") or a second SNR mode (e.g., by using a value of "1"). The indicated SNR mode may correspond to a downlink communication 435 in time slot n 415, a downlink communication 440 in time slot n+1 420, and so on.

[0070] In some aspects, the indication of the SNR mode to be used by the UE 120 for one or more downlink communications in one or more time slots may include a plurality of bits in the DCI 430 indicating the SNR mode from among the two or more SNR modes. The indication of the SNR mode may include a specific field pattern of the DCI 430. For example, the SNR mode may be indicated using a PDCCH order including a specified field pattern of DCI format 1_0. In some aspects, the indication of the SNR mode may indicate one or more time slots in which the SNR mode is to be used.

[0071] In some aspects, the indication of the SNR mode may include an indication that the SNR mode is a higher SNR mode than the SNR mode active for the UE 120 in the first time slot 410. That is, for example, the BS 110 may transmit an indication that an upcoming time slot or multiple time slots (e.g., time slot n 415, time slot n+1 420, etc.) may require a higher SNR mode than required for the first time slot 410. The higher SNR mode may be indicated based at least in part on the DCI 430 including a time slot offset parameter K0 having a value that satisfies a threshold (e.g., K0>0). The time slot offset parameter K0 may indicate an amount of time between the DCI 430 and a communication scheduled by the DCI 430 (e.g., downlink communication 435, downlink communication 440, etc.). The communication scheduled by the DCI 430 may be transmitted via a PDSCH, a power control subchannel (PCSCH), etc.

[0072] As indicated by reference numeral 445, the UE 120 may operate using the indicated SNR mode in the one or more time slots (e.g., time slot n 415, time slot n+1 420, etc.) based at least in part on the indication. The UE 120 may be configured to operate in the SNR mode until a new indication for a different SNR mode is received, a duration (e.g., number of time slots) specified by the indication is reached, and the like.

[0073] In some aspects, a low SNR mode may refer to an operating mode in which any number of power optimizations may be applied. Power optimization may include, for example, reducing the number of effective bits available to an analog-to-digital converter (ADC) (which corresponds to the effective resolution of the ADC), and / or reducing the number of bits used by the overall receive chain (e.g., ignoring or "zeroing" one or more least significant bits (LSBs) of the number of bits received per data packet). In some aspects, power optimization may include disabling or modifying the operation of a synthesizer (e.g., reducing the amount of power delivered to the synthesizer, or effectively shutting down the synthesizer), reducing the power driving a low noise amplifier (LNA), reducing the power of a signal from an oscillator to be combined with a received signal at a mixer, and / or other similar operations that may introduce additional phase and / or thermal noise into the received signal. In some aspects, power optimization may include reducing the amount of power delivered to an anti-aliasing filter, which may, for example, disable or reduce the functionality of one or more filter elements of the anti-aliasing filter. In some aspects, power optimization may include using a linear minimum mean square error (LMMSE) mapper instead of a maximum likelihood (ML) mapper, using 2D linear interpolated channel estimates (chEst: 1), and the like.

[0074] Some aspects of the SNR indication techniques described above may enable UE 120 to activate a low SNR mode when a lower SNR is required to decode a transmission, thereby facilitating power savings. Some aspects of the SNR indication techniques described above may also enable BS 110 to provide an indication of the SNR mode for an upcoming time slot so that UE 120 may have time to switch to the indicated SNR mode before decoding communications in the time slot. Some aspects of the signaling described herein for indicating the SNR mode may achieve these power savings without increasing transmission overhead. Several different SNR modes may be used to improve the efficiency of operation by achieving a finer granularity correlation between the SNR mode and the MCS and / or rank.

[0075] As indicated above, Figure 4 are provided as examples. Other examples may differ from those described herein. Figure 4 Examples described.

[0076] Figure 5 is a diagram illustrating another example 500 of indicating an SNR for downlink communications according to the present disclosure. Figure 5 As shown in FIG. 1 , BS 110 and UE 120 may communicate with each other.

[0077] As shown by reference numeral 510, UE 120 may transmit a UE capability report, and BS 110 may receive the UE capability report, which may include an indication that UE 120 supports SNR modes. In some aspects, the UE capability report may indicate one or more additional SNR modes supported by UE 120 among a plurality of SNR modes. The UE capability report may indicate a number of bits to be used by BS 110 to indicate the SNR mode. In some aspects, the number of bits to be used by BS 110 to indicate the SNR mode may be indicated (and / or determined by BS 110) based at least in part on the number of supported SNR modes indicated in the UE capability report.

[0078] As shown by reference numeral 520, BS 110 may transmit, and UE 120 may receive, an indication of a mapping between a set of bit values ​​for one or more bits indicating an SNR mode and at least one of a corresponding set of SNR modes, a corresponding set of MCSs, a corresponding set of ranks, a corresponding set of combinations of MCSs and ranks, or a combination thereof. The indication of the mapping may be transmitted in a radio resource control (RRC) communication. In some aspects, the mapping may be specified according to a wireless communication standard.

[0079] As shown by reference numeral 530, BS 110 may determine an MCS and a rank to be used for one or more downlink communications in one or more time slots. In some aspects, BS 110 may determine an SNR pattern from a plurality of SNR patterns to indicate to UE 120 for one or more downlink communications in one or more time slots. The SNR pattern may be determined based at least in part on at least one of the MCS, the rank, or a combination thereof.

[0080] As shown by reference numeral 540, BS 110 may transmit, and UE 120 may receive, DCI having one or more bit values ​​in a set of bit values. The one or more bit values ​​may indicate an SNR mode to be used by UE 120 for one or more downlink communications in one or more time slots. As shown by reference numeral 550, UE 120 may determine an SNR mode to use based at least in part on the one or more bit values ​​and an indication of a mapping of the bit values ​​received from BS 110.

[0081] In this way, some aspects of the SNR indication techniques described above may enable UE 120 to negotiate indication signaling with BS 110 so that BS 110 may provide an indication to UE 120 to activate an appropriate SNR mode for upcoming downlink communications, thereby facilitating power savings. Some aspects of the signaling described above for indicating the SNR mode may achieve these power savings without increasing transmission overhead, such as by using a PDCCH field pattern that does not require adding any bits to the DCI.

[0082] As indicated above, Figure 5 are provided as examples. Other examples may differ from those described herein. Figure 5 Examples described.

[0083] Figure 6 is a diagram illustrating an example process 600 performed, for example, by a UE in accordance with the present disclosure. Example process 600 is an example in which a UE (eg, UE 120, etc.) performs operations associated with indicating a signal-to-noise ratio for downlink communications.

[0084] like Figure 6As shown in , in some aspects, process 600 may include receiving, from a base station in a first time slot, an indication of a SNR mode of a plurality of signal-to-noise ratio (SNR) modes to be used by the UE for one or more downlink communications in one or more time slots occurring after the first time slot, wherein different SNR modes of the plurality of SNR modes support at least one of different modulation and coding schemes, different ranks, or a combination thereof (block 610). For example, the UE (e.g., using receive processor 258, controller / processor 280, memory 282, etc.) may receive, from a base station in a first time slot, an indication of a SNR mode of a plurality of signal-to-noise ratio (SNR) modes to be used by the UE for one or more downlink communications in one or more time slots occurring after the first time slot, as described above. In some aspects, different SNR modes of the plurality of SNR modes support at least one of different modulation and coding schemes, different ranks, or a combination thereof.

[0085] like Figure 6 As further shown in FIG. 6 , in some aspects, process 600 may include operating using the SNR pattern in the one or more time slots based at least in part on the indication (block 620). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may operate using the SNR pattern in the one or more time slots based at least in part on the indication, as described above.

[0086] Process 600 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.

[0087] In a first aspect, process 600 includes transmitting, to a base station, a UE capability report including an indication that the UE supports an SNR mode.

[0088] In a second aspect, alone or in combination with the first aspect, the UE capability report indicates one or more additional SNR modes supported by the UE among the plurality of SNR modes.

[0089] In a third aspect, alone or in combination with one or more of the first and second aspects, the UE capability report indicates a number of bits to be used by the base station to indicate the SNR mode.

[0090] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, process 600 includes receiving from the base station an indication of a mapping between a set of bit values ​​of one or more bits indicating the SNR mode and at least one of the following: a setting corresponding to the SNR mode, a setting corresponding to the modulation and coding scheme, a setting corresponding to the rank, a setting corresponding to a combination of the modulation and coding scheme and the rank, or a combination thereof.

[0091] In a fifth aspect, alone or in combination with the fourth aspect, the indication of the SNR pattern to be used by the UE for one or more downlink communications in one or more time slots comprises one or more bit values ​​in the set of bit values.

[0092] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, an indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots is included in downlink control information (DCI).

[0093] In a seventh aspect, either alone or in combination with the sixth aspect, the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots is a single bit in the DCI indicating a first SNR mode or a second SNR mode.

[0094] In an eighth aspect, either alone or in combination with the sixth aspect, the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots comprises a plurality of bits in the DCI indicating the SNR mode from among more than two SNR modes.

[0095] In a ninth aspect, either alone or in combination with one or more of the sixth or eighth aspects, the indication of the SNR pattern to be used by the UE for the one or more downlink communications in the one or more time slots comprises a specific field pattern of the DCI.

[0096] In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots specifies the one or more time slots.

[0097] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots includes: an indication that the SNR mode is a higher SNR mode compared to the SNR mode active for the UE in the first time slot.

[0098] In a twelfth aspect, either alone or in combination with the eleventh aspect, the higher SNR mode is indicated based at least in part on downlink control information (DCI) including a time slot offset parameter having a value greater than a threshold, the time slot offset parameter indicating an amount of time between the DCI and a communication scheduled by the DCI.

[0099] although Figure 6 An example block diagram of process 600 is shown, but in some aspects, process 600 may include Figure 6 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in process 600. Additionally or alternatively, two or more blocks of process 600 may be executed in parallel.

[0100] Figure 7 is a diagram illustrating an example process 700 performed, for example, by a base station in accordance with the present disclosure. Example process 700 is an example in which a base station (eg, base station 110, etc.) performs operations associated with indicating a signal-to-noise ratio for downlink communications.

[0101] like Figure 7 As shown in , in some aspects, process 700 may include determining a modulation and coding scheme (MCS) and rank to be used for one or more downlink communications in one or more time slots (block 710). For example, a base station (e.g., using transmit processor 220, receive processor 238, controller / processor 240, memory 242, etc.) may determine a modulation and coding scheme (MCS) and rank to be used for one or more downlink communications in one or more time slots, as described above.

[0102] like Figure 7 As further shown in FIG. 7 , in some aspects, process 700 may include determining, based at least in part on at least one of the MCS, the rank, or a combination thereof, a signal-to-noise ratio (SNR) pattern from a plurality of SNR patterns to indicate to the UE for one or more downlink communications in one or more time slots (block 720). For example, a base station (e.g., using transmit processor 220, receive processor 238, controller / processor 240, memory 242, etc.) may determine, based at least in part on at least one of the MCS, the rank, or a combination thereof, a signal-to-noise ratio (SNR) pattern from a plurality of SNR patterns to indicate to the UE for one or more downlink communications in one or more time slots, as described above.

[0103] like Figure 7 As further shown in FIG. 7 , in some aspects, process 700 may include transmitting an indication of the SNR mode to the UE (block 730). For example, the base station (e.g., using transmit processor 220, controller / processor 240, memory 242, etc.) may transmit an indication of the SNR mode to the UE, as described above.

[0104] 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.

[0105] In a first aspect, process 700 includes receiving, from a UE, a UE capability report including an indication that the UE supports the SNR mode.

[0106] In a second aspect, alone or in combination with the first aspect, the UE capability report indicates one or more additional SNR modes supported by the UE among the plurality of SNR modes.

[0107] In a third aspect, alone or in combination with one or more of the first and second aspects, the UE capability report indicates a number of bits to be used by the base station to indicate the SNR mode.

[0108] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, process 700 includes transmitting to the UE an indication of a mapping between a set of bit values ​​of one or more bits for indicating the SNR mode and at least one of the following: a setting corresponding to the SNR mode, a setting corresponding to the modulation and coding scheme, a setting corresponding to the rank, a setting corresponding to a combination of the modulation and coding scheme and the rank, or a combination thereof.

[0109] In a fifth aspect, alone or in combination with the fourth aspect, the indication of the SNR pattern to be used by the UE for the one or more downlink communications in the one or more time slots comprises one or more bit values ​​in the set of bit values.

[0110] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, an indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots is included in downlink control information (DCI).

[0111] In a seventh aspect, either alone or in combination with the sixth aspect, the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots is a single bit in the DCI indicating a first SNR mode or a second SNR mode.

[0112] In an eighth aspect, either alone or in combination with the sixth aspect, the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots comprises a plurality of bits in the DCI indicating the SNR mode from among more than two SNR modes.

[0113] In a ninth aspect, either alone or in combination with one or more of the sixth or eighth aspects, the indication of the SNR pattern to be used by the UE for the one or more downlink communications in the one or more time slots comprises a specific field pattern of the DCI.

[0114] In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots specifies the one or more time slots.

[0115] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots includes: an indication that the SNR mode is a higher SNR mode compared to the SNR mode active for the UE in the first time slot.

[0116] In a twelfth aspect, either alone or in combination with the eleventh aspect, the higher SNR mode is indicated based at least in part on downlink control information (DCI) including a time slot offset parameter having a value greater than a threshold, the time slot offset parameter indicating an amount of time between the DCI and a communication scheduled by the DCI.

[0117] although Figure 7 An example block diagram of process 700 is shown, but in some aspects, process 700 may include Figure 7 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 700. Additionally or alternatively, two or more blocks of the process 700 may be executed in parallel.

[0118] The following provides an overview of some aspects of the disclosure:

[0119] Aspect 1: A wireless communication method performed by a user equipment (UE), comprising: receiving from a base station in a first time slot an indication of a signal-to-noise ratio (SNR) mode among multiple SNR modes to be used by the UE for one or more downlink communications in one or more time slots occurring after the first time slot, wherein different SNR modes among the multiple SNR modes support at least one of different modulation and coding schemes, different ranks, or a combination thereof; and operating using the SNR mode in the one or more time slots based at least in part on the indication.

[0120] Aspect 2: The method of Aspect 1 further comprises: transmitting to the base station a UE capability report including an indication that the UE supports the SNR mode.

[0121] Aspect 3: A method as in Aspect 2, wherein the UE capability report indicates one or more additional SNR modes supported by the UE among the multiple SNR modes.

[0122] Aspect 4: The method of any one of Aspects 2 or 3, wherein the UE capability report indicates the number of bits to be used by the base station to indicate the SNR mode.

[0123] Aspect 5: The method as in any one of Aspects 1-4 further includes receiving from the base station an indication of a mapping between a set of bit values ​​of one or more bits used to indicate the SNR mode and at least one of the following: a corresponding set of SNR modes, a corresponding set of modulation and coding schemes, a corresponding set of ranks, a corresponding set of combinations of modulation and coding schemes and ranks, or a combination thereof.

[0124] Aspect 6: The method of aspect 5, wherein the indication of the SNR pattern to be used by the UE for the one or more downlink communications in the one or more time slots comprises one or more bit values ​​in the set of bit values.

[0125] Aspect 7: The method of any one of Aspects 1-6, wherein the indication of the SNR pattern to be used by the UE for the one or more downlink communications in the one or more time slots is included in downlink control information (DCI).

[0126] Aspect 8: A method as in Aspect 7, wherein the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots is a single bit in the DCI indicating a first SNR mode or a second SNR mode.

[0127] Aspect 9: A method as in Aspect 7, wherein the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots comprises a plurality of bits in the DCI indicating the SNR mode from among more than two SNR modes.

[0128] Aspect 10: The method of any one of Aspects 7 or 9, wherein the indication of the SNR pattern to be used by the UE for the one or more downlink communications in the one or more time slots comprises a specific field pattern of the DCI.

[0129] Aspect 11: The method of any one of aspects 1-10, wherein the indication of the SNR pattern to be used by the UE for the one or more downlink communications in the one or more time slots specifies the one or more time slots.

[0130] Aspect 12: A method as in any of Aspects 1-11, wherein the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots includes: an indication that the SNR mode is a higher SNR mode compared to the SNR mode active for the UE in the first time slot.

[0131] Aspect 13: A method as in Aspect 12, wherein the higher SNR mode is indicated at least in part based on downlink control information (DCI) including a time slot offset parameter having a value greater than a threshold, wherein the time slot offset parameter indicates an amount of time between the DCI and a communication scheduled by the DCI.

[0132] Aspect 14: A wireless communication method performed by a base station, comprising: determining a modulation and coding scheme (MCS) and rank to be used for one or more downlink communications in one or more time slots; determining an SNR mode from a plurality of signal-to-noise ratio (SNR) modes to be indicated to a user equipment (UE) for use in the one or more downlink communications in the one or more time slots based at least in part on the MCS, the rank, or a combination thereof; and transmitting an indication of the SNR mode to the UE.

[0133] Aspect 15: The method of Aspect 14 further comprises: receiving a UE capability report from the UE including an indication that the UE supports the SNR mode.

[0134] Aspect 16: The method of Aspect 15, wherein the UE capability report indicates one or more additional SNR modes supported by the UE among the multiple SNR modes.

[0135] Aspect 17: The method of any one of Aspects 15 or 16, wherein the UE capability report indicates the number of bits to be used by the base station to indicate the SNR mode.

[0136] Aspect 18: The method as in any one of Aspects 14-17 further includes transmitting to the UE an indication of a mapping between a set of bit values ​​of one or more bits used to indicate the SNR mode and at least one of: a corresponding set of SNR modes, a corresponding set of modulation and coding schemes, a corresponding set of ranks, a corresponding set of combinations of modulation and coding schemes and ranks, or a combination thereof.

[0137] Aspect 19: The method of Aspect 18, wherein the indication of the SNR pattern to be used by the UE for the one or more downlink communications in the one or more time slots comprises one or more bit values ​​in the set of bit values.

[0138] Aspect 20: The method of any one of aspects 14-19, wherein the indication of the SNR pattern to be used by the UE for the one or more downlink communications in the one or more time slots is included in downlink control information (DCI).

[0139] Aspect 21: A method as in Aspect 20, wherein the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots is a single bit in the DCI indicating a first SNR mode or a second SNR mode.

[0140] Aspect 22: A method as in Aspect 20, wherein the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots comprises a plurality of bits in the DCI indicating the SNR mode from among more than two SNR modes.

[0141] Aspect 23: The method of any one of Aspects 20 or 22, wherein the indication of the SNR pattern to be used by the UE for the one or more downlink communications in the one or more time slots comprises a specific field pattern of the DCI.

[0142] Aspect 24: The method of any one of aspects 14-23, wherein the indication of the SNR pattern to be used by the UE for the one or more downlink communications in the one or more time slots specifies the one or more time slots.

[0143] Aspect 25: A method as in any of Aspects 14-24, wherein the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots includes an indication that the SNR mode is a higher SNR mode compared to the SNR mode active for the UE in the first time slot.

[0144] Aspect 26: A method as in Aspect 25, wherein the higher SNR mode is indicated at least in part based on downlink control information (DCI) including a time slot offset parameter having a value greater than a threshold, wherein the time slot offset parameter indicates an amount of time between the DCI and a communication scheduled by the DCI.

[0145] Aspect 27: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method as in one or more of Aspects 1-13.

[0146] Aspect 28: A device for wireless communication, comprising: a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform the method of one or more aspects of aspects 1-13.

[0147] Aspect 29: An apparatus for wireless communication, comprising: at least one device for performing the method of one or more aspects of aspects 1-13.

[0148] Aspect 30: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more aspects of aspects 1-13.

[0149] Aspect 31: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform a method as in one or more aspects of aspects 1-13.

[0150] Aspect 32: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method as in one or more aspects of Aspects 14-26.

[0151] Aspect 33: A device for wireless communication, comprising: a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform the method of one or more aspects of aspects 14-26.

[0152] Aspect 34: An apparatus for wireless communication, comprising: at least one device for performing the method of one or more aspects of aspects 14-26.

[0153] Aspect 35: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more aspects of aspects 14-26.

[0154] Aspect 36: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more aspects of aspects 14-26.

[0155] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired by practice of the various aspects.

[0156] As used herein, the term "component" is intended to be broadly interpreted as a combination of hardware and / or hardware and software. "Software" should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and / or functions, etc., whether it is described in software, firmware, middleware, microcode, hardware description language or other terms. As used herein, processors are implemented with hardware, and / or a combination of hardware and software. It will be obvious that the systems and / or methods described herein can be implemented in different forms of hardware, and / or a combination of hardware and software. The actual dedicated control hardware or software code for implementing these systems and / or methods does not limit various aspects. Thus, the operation and behavior of these systems and / or methods are described herein without reference to specific software codes--it is understood that software and hardware can be designed to implement these systems and / or methods based at least in part on the description herein.

[0157] As used herein, satisfying a threshold may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0158] Although specific feature combinations are described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner not specifically described in the claims and / or undisclosed in the specification. Although each dependent claim listed below can be directly subordinate to only one claim, the disclosure of various aspects includes that each dependent claim is combined with each other claim in this group of claims. As used herein, the phrase quoting "at least one of" a column of items refers to any combination of these items, including single members. As an example, "at least one of a, b or c" is intended to cover: a, b, c, ab, ac, bc and abc, and any combination with multiple identical elements (for example, aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc, or any other sorting of a, b and c).

[0159] Elements, actions or instructions used herein should not be interpreted as key or necessary unless explicitly described as such. Moreover, as used herein, the articles "one" and "a" are intended to include one or more projects, and can be used interchangeably with "one or more". In addition, as used herein, the article "the" is intended to include one or more projects quoted in conjunction with the article "the", and can be used interchangeably with "one or more". In addition, as used herein, the terms "set (set)" and "group" are intended to include one or more projects (for example, a combination of related items, non-related items, or related items and non-related items), and can be used interchangeably with "one or more". In the occasion of intending to have only one project, the phrase "only one" or similar language is used. Moreover, as used herein, the terms "having", "containing", "including" etc. are intended to be open terms. In addition, the phrase "based on" is intended to mean "based at least in part on", unless otherwise explicitly stated. Furthermore, as used herein, the term "or" when used in a sequence is intended to be inclusive and may be used interchangeably with "and / or" unless explicitly stated otherwise (e.g., when used in conjunction with "either of" or "only one of").

Claims

1. A user equipment (UE) for wireless communication, comprising: Memory; as well as one or more processors coupled to the memory, the one or more processors configured to cause the UE to: receiving, from a base station in a first time slot, an indication of a signal-to-noise ratio (SNR) mode of a plurality of SNR modes to be used by the UE for one or more downlink communications in one or more time slots occurring after the first time slot, wherein different ones of the plurality of SNR modes support at least one of different modulation and coding schemes, different ranks, or a combination thereof, and wherein the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots comprises an indication that the SNR mode is a higher SNR mode than an SNR mode active for the UE in the first time slot, and wherein the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots is included in downlink control information (DCI) of the first time slot, and wherein the DCI comprises a slot offset parameter indicating an amount of time between the DCI of the first time slot and the one or more downlink communications for which the SNR mode is to be used; as well as Operating using the SNR pattern in the one or more time slots is performed based at least in part on the indication.

2. The UE of claim 1, wherein the one or more processors are further configured to cause the UE to: transmit a UE capability report to the base station including an indication that the UE supports the SNR mode.

3. The UE of claim 2, wherein the UE capability report indicates one or more additional SNR modes supported by the UE among the multiple SNR modes.

4. The UE of claim 2, wherein the UE capability report indicates a number of bits to be used by the base station to indicate the SNR mode.

5. The UE of claim 1 , wherein the one or more processors are further configured to cause the UE to receive, from the base station, an indication of a mapping between a set of bit values ​​for one or more bits indicating the SNR mode and at least one of: The corresponding set of SNR modes, The corresponding set of modulation and coding schemes, The corresponding set of ranks, a corresponding set of combinations of modulation and coding schemes and ranks, or Its combination.

6. The UE of claim 5, wherein the indication of the SNR pattern to be used by the UE for the one or more downlink communications in the one or more time slots comprises one or more bit values ​​from the set of bit values.

7. The UE of claim 1, wherein the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots is included in downlink control information (DCI).

8. The UE of claim 7, wherein the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots is a single bit in the DCI indicating a first SNR mode or a second SNR mode.

9. The UE of claim 7, wherein the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots comprises a plurality of bits in the DCI indicating the SNR mode from among more than two SNR modes.

10. The UE of claim 7, wherein the indication of the SNR pattern to be used by the UE for the one or more downlink communications in the one or more time slots comprises a specific field pattern of the DCI.

11. The UE of claim 1 , wherein the indication of the SNR pattern to be used by the UE for the one or more downlink communications in the one or more time slots specifies the one or more time slots.

12. The UE of claim 1, wherein the higher SNR mode is indicated based at least in part on the time slot offset parameter comprising a value greater than a threshold.

13. A base station for wireless communication, comprising: Memory; as well as one or more processors coupled to the memory, the one or more processors configured to cause the base station to: determining a modulation and coding scheme (MCS) and rank to be used for one or more downlink communications in one or more time slots; determining, based at least in part on at least one of the MCS, the rank, or a combination thereof, a signal-to-noise ratio (SNR) pattern from a plurality of SNR patterns to indicate to a user equipment (UE) for the one or more downlink communications in the one or more time slots; as well as transmitting an indication of the SNR mode to the UE, wherein the indication of the SNR mode includes an indication that the SNR mode is a higher SNR mode compared to an SNR mode active for the UE in a first time slot, and wherein the SNR mode to be indicated to the UE for the one or more downlink communications in the one or more time slots is included in downlink control information (DCI), and wherein the DCI includes a time slot offset parameter that indicates an amount of time between the DCI and the one or more downlink communications for which the SNR mode is to be used.

14. The base station of claim 13, wherein the one or more processors are further configured to cause the base station to: receive, from the UE, a UE capability report including an indication that the UE supports the SNR mode.

15. The base station of claim 14, wherein the UE capability report indicates one or more additional SNR modes supported by the UE among the plurality of SNR modes.

16. The base station of claim 14, wherein the UE capability report indicates a number of bits to be used by the base station to indicate the SNR mode.

17. The base station of claim 13, wherein the one or more processors are further configured to cause the base station to transmit to the UE an indication of a mapping between a set of bit values ​​for one or more bits indicating the SNR mode and at least one of: The corresponding set of SNR modes, The corresponding set of modulation and coding schemes, The corresponding set of ranks, a corresponding set of combinations of modulation and coding schemes and ranks, or Its combination.

18. The base station of claim 17, wherein the indication of the SNR pattern to be used by the UE for the one or more downlink communications in the one or more time slots comprises one or more bit values ​​from the set of bit values.

19. The base station of claim 13, wherein the indication of the SNR pattern to be used by the UE for the one or more downlink communications in the one or more time slots is included in downlink control information (DCI).

20. The base station of claim 19, wherein the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots is a single bit in the DCI indicating a first SNR mode or a second SNR mode.

21. The base station of claim 19, wherein the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots comprises a plurality of bits in the DCI indicating the SNR mode from among more than two SNR modes.

22. The base station of claim 19, wherein the indication of the SNR pattern to be used by the UE for the one or more downlink communications in the one or more time slots comprises a specific field pattern of the DCI.

23. The base station of claim 13, wherein the indication of the SNR pattern to be used by the UE for the one or more downlink communications in the one or more time slots specifies the one or more time slots.

24. The base station of claim 13, wherein the higher SNR mode is indicated based at least in part on the time slot offset parameter comprising a value greater than a threshold.

25. A wireless communication method performed by a user equipment (UE), the method comprising: receiving, from a base station in a first time slot, an indication of a signal-to-noise ratio (SNR) mode of a plurality of SNR modes to be used by the UE for one or more downlink communications in one or more time slots occurring after the first time slot, wherein different ones of the plurality of SNR modes support at least one of different modulation and coding schemes, different ranks, or a combination thereof, and wherein the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots is included in downlink control information (DCI) of the first time slot, and wherein the indication of the SNR mode to be used by the UE for the one or more downlink communications in the one or more time slots includes an indication that the SNR mode is a higher SNR mode than an SNR mode active for the UE in the first time slot, and wherein the DCI includes a slot offset parameter indicating an amount of time between the DCI of the first time slot and the one or more downlink communications for which the SNR mode is to be used; as well as Operating using the SNR pattern in the one or more time slots is performed based at least in part on the indication.

26. The method of claim 25, further comprising: A UE capability report including an indication that the UE supports the SNR mode is transmitted to the base station.

27. A wireless communication method performed by a base station, the method comprising: determining a modulation and coding scheme (MCS) and rank to be used for one or more downlink communications in one or more time slots; determining, based at least in part on at least one of the MCS, the rank, or a combination thereof, a signal-to-noise ratio (SNR) pattern from a plurality of SNR patterns to indicate to a user equipment (UE) for the one or more downlink communications in the one or more time slots; as well as transmitting an indication of the SNR mode to the UE, wherein the indication of the SNR mode includes an indication that the SNR mode is a higher SNR mode compared to an SNR mode active for the UE in a first time slot, and wherein the SNR mode to be indicated to the UE for the one or more downlink communications in the one or more time slots is included in downlink control information (DCI), and wherein the DCI includes a time slot offset parameter that indicates an amount of time between the DCI and the one or more downlink communications for which the SNR mode is to be used.

28. The method of claim 27, further comprising: A UE capability report is received from the UE including an indication that the UE supports the SNR mode.

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