Uplink aspects for NB-IoT

Abstract

Certain aspects of the subject matter described in this disclosure may be implemented in a method for wireless communications. The method generally includes receiving a configuration message for narrowband Internet of Things (NB-IoT) communications, the configuration message indicating one or more parameters for an uplink transmission using a modulation and coding scheme (MCS) associated with a modulation order of at least four; generating the uplink transmission; and sending the uplink transmission in accordance with the one or more parameters.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. Application No. 17 / 171,721, filed on February 9, 2021, which claims the benefit of and priority to U.S. Provisional Application No. 62 / 972,612, filed on February 10, 2020, both of which are assigned to the assignee of this application and are hereby expressly incorporated herein by reference in their entirety as if fully set forth below and for all applicable purposes.

[0003] background

[0004] Public domain

[0005] Aspects of the present disclosure relate to wireless communications and, more particularly, to technologies for Narrowband Internet of Things (NB-IoT).

[0006] Related technical description

[0007] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcast, etc. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access systems include 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, 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, and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, to name just a few.

[0008] These multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different wireless devices to communicate at city, country, region, and even global levels. New radio (e.g., 5G NR) is an example of an emerging telecommunication standard. NR is an enhancement set of the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by using OFDMA with cyclic prefix (CP) on downlink (DL) and uplink (UL) to improve spectrum efficiency, reduce costs, improve services, utilize new spectrum, and better integrate with other open standards. To this end, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0009] However, as the demand for mobile broadband access continues to grow, there is a need for further improvements to NR and LTE technologies. Preferably, these improvements should be applicable to other multiple access technologies and the telecommunication standards that employ these technologies.

[0010] Overview

[0011] The systems, methods, and devices of the present disclosure each have several aspects, no single one of which is solely responsible for its desirable attributes. Without limiting the scope of the present disclosure as expressed in the appended claims, some features will now be briefly discussed. After considering this discussion, and particularly after reading the section entitled "Detailed Description," it will be understood how the features of the present disclosure provide advantages including improved narrowband Internet of Things (NB-IoT) communications.

[0012] Certain aspects of the subject matter described in the present disclosure may be implemented in a method for wireless communication. The method generally includes: receiving a configuration message for narrowband Internet of Things (NB-IoT) communications, the configuration message indicating one or more parameters for an uplink transmission using a modulation and coding scheme (MCS) associated with a modulation order of at least four; generating the uplink transmission; and sending the uplink transmission according to the one or more parameters.

[0013] Certain aspects of the subject matter described in the present disclosure may be implemented in a method for wireless communications. The method generally includes: generating a configuration message for NB-IoT communications, the configuration message indicating one or more parameters for uplink transmissions using an MCS associated with a modulation order of at least four; transmitting the configuration message; and receiving the uplink transmission based on the one or more parameters.

[0014] Certain aspects of the subject matter described in the present disclosure can be implemented in an apparatus for wireless communication. The apparatus generally includes a receiver, a processing system, and a transmitter; the receiver is configured to receive a configuration message for NB-IoT communication, the configuration message indicating one or more parameters for an uplink transmission using an MCS associated with a modulation order of at least four; the processing system is configured to generate the uplink transmission; the transmitter is configured to send the uplink transmission according to the one or more parameters.

[0015] Certain aspects of the subject matter described in the present disclosure may be implemented in an apparatus for wireless communication. The apparatus generally includes a processing system, a transmitter, and a receiver; the processing system is configured to generate a configuration message for NB-IoT communication, the configuration message indicating one or more parameters for uplink transmission using an MCS associated with a modulation order of at least four; the transmitter is configured to transmit the configuration message; the receiver is configured to receive the uplink transmission according to the one or more parameters.

[0016] Certain aspects of the subject matter described in the present disclosure can be implemented in an apparatus for wireless communication. The apparatus generally includes: means for receiving a configuration message for NB-IoT communication, the configuration message indicating one or more parameters for an uplink transmission using an MCS associated with a modulation order of at least four; means for generating the uplink transmission; and means for sending the uplink transmission according to the one or more parameters.

[0017] Certain aspects of the subject matter described in the present disclosure can be implemented in an apparatus for wireless communication. The apparatus generally includes: means for generating a configuration message for NB-IoT communication, the configuration message indicating one or more parameters for uplink transmission using an MCS associated with a modulation order of at least four; means for transmitting the configuration message; and means for receiving the uplink transmission based on the one or more parameters.

[0018] Certain aspects of the subject matter described in the present disclosure may be implemented in a computer-readable medium having instructions stored thereon, the instructions causing an apparatus to: receive a configuration message for NB-IoT communications, the configuration message indicating one or more parameters for an uplink transmission using an MCS associated with a modulation order of at least four; generate the uplink transmission; and send the uplink transmission based on the one or more parameters.

[0019] Certain aspects of the subject matter described in the present disclosure may be implemented in a computer-readable medium having instructions stored thereon, the instructions causing an apparatus to: generate a configuration message for NB-IoT communications, the configuration message indicating one or more parameters for an uplink transmission using an MCS associated with a modulation order of at least four; transmit the configuration message; and receive the uplink transmission based on the one or more parameters.

[0020] To achieve the foregoing and related ends, the one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail certain illustrative features of the one or more aspects. However, these features are only indicative of several of the various ways in which the principles of the various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to understand in detail the manner in which the above-stated features of the present disclosure are used, a more particular description of the content briefly summarized above may be made with reference to various aspects, some of which are illustrated in the accompanying drawings. It should be noted, however, that the accompanying drawings illustrate only certain typical aspects of the present disclosure and are not to be considered limiting of its scope, as the description may admit to other equally effective aspects.

[0023] Figure 1is a block diagram conceptually illustrating an example telecommunications system in accordance with certain aspects of the present disclosure.

[0024] Figure 2 is a block diagram conceptually illustrating designs of example base stations (BSs) and user equipment (UEs) in accordance with certain aspects of the present disclosure.

[0025] Figure 3 is an example frame format for New Radio (NR) in accordance with certain aspects of the present disclosure.

[0026] Figure 4 is a call flow diagram illustrating an example four-step RACH procedure in accordance with certain aspects of the present disclosure.

[0027] Figure 5 is a flow diagram illustrating example operations for wireless communications by a BS in accordance with certain aspects of the present disclosure.

[0028] Figure 6 is a flow diagram illustrating example operations for wireless communications by a UE in accordance with certain aspects of the present disclosure.

[0029] Fig. 7A is a table indicating a mapping of candidate modulation and coding schemes (MCSs) to transport block sizes (TBSs) in accordance with certain aspects of the present disclosure.

[0030] Figure 7B Candidate configuration parameters in accordance with certain aspects of the present disclosure are illustrated.

[0031] Figure 8 Illustrated are communications devices that may include various components configured to perform operations for the techniques disclosed herein in accordance with aspects of the present disclosure.

[0032] To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized in other aspects without specific recitation.

[0033] Detailed Description

[0034] Aspects of the present disclosure provide apparatus (devices), methods, processing systems, and computer-readable media for narrowband Internet of Things (NB-IoT) communications.

[0035] The following description provides an example of NB-IoT in a communication system, without limiting the scope, applicability or examples set forth in the claims. Changes may be made to the functions and arrangements of the elements discussed without departing from the scope of the present disclosure. Various examples may appropriately omit, replace, or add various procedures or components. For example, the described method may be performed in an order different from the order described, and various steps may be added, omitted, or combined. Moreover, the features described with reference to some examples may be combined in some other examples. For example, any number of aspects set forth herein may 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 other structures, functionalities, or structures and functionalities as supplements to the various aspects of the present disclosure set forth herein or in addition. It should be understood that any aspect of the present disclosure disclosed herein may be implemented by one or more elements of the claims. The wording "exemplary" is used herein to mean "used as an example, instance, or explanation". Any aspect described as "exemplary" herein is not necessarily to be interpreted as superior to or superior to other aspects.

[0036] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific radio access technology (RAT) and may operate on one or more frequencies. RAT may also be referred to as a radio technology, air interface, etc. Frequency may also be referred to as a carrier, subcarrier, frequency channel, frequency tone, subband, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs.

[0037] The techniques described herein can be used for various wireless networks and radio technologies. Although various aspects may be described herein using terms typically associated with 3G, 4G, and / or new radio (e.g., 5G NR) wireless technologies, various aspects of the present disclosure may be applied in communication systems based on other generations.

[0038] NR access can support various wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth (e.g., 80 MHz or more), millimeter wave (mmW) targeting high carrier frequency (e.g., 25 GHz or more), massive machine type communication MTC (mMTC) targeting non-backward compatible MTC technology, and / or mission critical services targeting ultra-reliable low latency communication (URLLC). These services may include latency and reliability requirements. These services may also have different transmission time intervals (TTIs) to meet corresponding quality of service (QoS) requirements. In addition, these services can coexist in the same subframe. NR supports beamforming and the beam direction can be dynamically configured. MIMO transmission with precoding can also be supported. MIMO configuration in DL can support up to 8 transmit antennas (with multi-layer DL transmission of up to 8 streams) and up to 2 streams per UE. Multi-layer transmission of up to 2 streams per UE can be supported. Aggregation of multiple cells can be supported using up to 8 serving cells.

[0039] Figure 1 An example wireless communication network 100 is illustrated in which aspects of the present disclosure may be performed. For example, the wireless communication network 100 may be a NR system (e.g., a 5G NR network). Figure 1 As shown in , the wireless communication network 100 may be in communication with a core network 132. The core network 132 may be in communication with one or more base stations (BSs) 110 and / or user equipments (UEs) 120 in the wireless communication network 100 via one or more interfaces.

[0040] like Figure 1 As illustrated in , the wireless communication network 100 may include several BSs 110a-z (each also individually referred to herein as BS 110, or collectively referred to as BS 110) and other network entities. BS 110 may provide communication coverage for a particular geographic area (sometimes referred to as a "cell"), which may be stationary or mobile depending on the location of the mobile BS 110. In some examples, BS 110 may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in the wireless communication network 100 via various types of backhaul interfaces (e.g., direct physical connections, wireless connections, virtual networks, etc.) using any suitable transport network. Figure 1In the example shown in FIG. 1 , BSs 110a, 110b, and 110c may be macro BSs for macro cells 102a, 102b, and 102c, respectively. BS 110x may be a pico BS for pico cell 102x. BSs 110y and 110z may be femto BSs for femto cells 102y and 102z, respectively. A BS may support one or more cells. A network controller 130 may be coupled to a set of BSs 110 and provide coordination and control (e.g., via a backhaul) for these BSs 110.

[0041] BS 110 communicates with UEs 120a-y (each also individually referred to herein as UE 120, or collectively referred to as UE 120) in the wireless communication network 100. UEs 120 (e.g., 120x, 120y, etc.) may be dispersed throughout the wireless communication network 100, and each UE 120 may be stationary or mobile. The wireless communication network 100 may also include a relay station (e.g., relay station 110r) (also referred to as a relay, etc.) that receives transmissions of data and / or other information from an upstream station (e.g., BS 110a or UE 120r) and sends transmissions of the data and / or other information to a downstream station (e.g., UE 120 or BS 110), or that relays transmissions between UEs 120 to facilitate communication between the devices.

[0042] According to certain aspects, BS 110 and UE 120 may be configured for NB-IoT communications. Figure 1 As shown in FIG. 1 , BS 110a includes a NB-IoT manager 112. According to aspects of the present disclosure, the NB-IoT manager 112 may be configured to configure narrowband uplink transmissions using a modulation and coding scheme (MCS) associated with a modulation order of at least four. Figure 1 As shown in FIG. 1 , UE 120a includes a NB-IoT manager 122. According to aspects of the present disclosure, the NB-IoT manager 122 may be configured to perform narrowband uplink transmissions using an MCS associated with a modulation order of at least four.

[0043] Figure 2 1 and 120a (eg, in the example embodiment of the present invention) that can be used to implement various aspects of the present disclosure. Figure 1 Example components of the wireless communication network 100).

[0044] At BS 110a, transmit processor 220 may receive data from data source 212 and control information from controller / processor 240. The control information may be for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ indicator channel (PHICH), a physical downlink control channel (PDCCH), a group common PDCCH (GC PDCCH), etc. The data may be for a physical downlink shared channel (PDSCH), etc. A medium access control (MAC)-control element (MAC-CE) is a MAC layer communication structure that may be used for control command exchange between wireless nodes. The MAC-CE may be carried in a shared channel such as a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), or a physical sidelink shared channel (PSSCH).

[0045] The processor 220 may process (e.g., encode and symbol map) data and control information to obtain data symbols and control symbols, respectively. The transmit processor 220 may also generate reference symbols (such as for a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a channel state information reference signal (CSI-RS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, and / or reference symbols, where applicable, and may provide an output symbol stream to a modulator (MOD) 232a-232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The downlink signals from the modulators 232a-232t may be transmitted via antennas 234a-234t, respectively.

[0046] At UE 120a, antennas 252a-252r may receive downlink signals from BS 110a and may provide received signals to demodulators (DEMODs) in transceivers 254a-254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples. Each demodulator 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 demodulators 254a-254r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 120a to a data sink 260, and provide decoded control information to a controller / processor 280.

[0047] On the uplink, at the UE 120a, a transmit processor 264 may receive and process data from a data source 262 (e.g., for a physical uplink shared channel (PUSCH)) and control information from a controller / processor 280 (e.g., for a physical uplink control channel (PUCCH)). The transmit processor 264 may also generate reference symbols for reference signals (e.g., a sounding reference signal (SRS)). The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, if applicable, further processed by a modulator in a transceiver 254a-254r (e.g., for SC-FDM, etc.), and transmitted to the BS 110a. At the BS 110a, the uplink signal from the UE 120a may be received by the antenna 234, processed by the modulator 232, detected by the MIMO detector 236, if applicable, and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120a. Receive processor 238 may provide decoded data to data sink 239 and decoded control information to controller / processor 240 .

[0048] Memories 242 and 282 may store data and program codes for BS 110a and UE 120a, respectively.A scheduler 244 may schedule UEs for data transmission on the downlink and / or uplink.

[0049] The antenna 252, processors 266, 258, 264 and / or controller / processor 280 of the UE 120a, and / or the antenna 234, processors 220, 230, 238 and / or controller / processor 240 of the BS 110a may be used to perform the various techniques and methods described herein. Figure 2 As shown in FIG. 1 , according to various aspects described herein, the controller / processor 240 of BS 110a has a NB-IoT manager 241 that can be configured to configure narrowband uplink transmissions using an MCS associated with a modulation order of at least four. Figure 2 As shown in FIG. 1 , the controller / processor 280 of the UE 120a has a NB-IoT manager 281 that can be configured to perform narrowband uplink transmissions using an MCS associated with a modulation order of at least four, in accordance with various aspects described herein. Although shown at the controller / processor, other components of the UE 120a and the BS 110a can also be used to perform the operations described herein.

[0050] NR can utilize orthogonal frequency division multiplexing (OFDM) with cyclic prefix (CP) on uplink and downlink. NR can support half-duplex operation using time division duplex (TDD). OFDM and single carrier frequency division multiplexing (SC-FDM) divide the system bandwidth into multiple orthogonal subcarriers, which are also often called frequency modulation, frequency slot, etc. Each subcarrier can be modulated with data. Modulation codewords can be sent in the frequency domain with OFDM and in the time domain with SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers can depend on the system bandwidth. The minimum resource allocation (so-called resource block (RB)) can be 12 consecutive subcarriers. The system bandwidth can also be divided into subbands. For example, one subband can cover multiple RBs. NR can support a base subcarrier spacing (SCS) of 15KHz, and other SCSs (e.g., 30kHz, 60kHz, 120kHz, 240kHz, etc.) can be defined relative to the base SCS.

[0051] Figure 3 300 is a diagram showing an example of a frame format for NR. The transmission timeline of each of the downlink and uplink may be divided into units of radio frames. Each radio frame may have a predetermined duration (e.g., 10 ms) and may be divided into 10 subframes with indices 0 to 9, each subframe being 1 ms. Each subframe may include a variable number of slots (e.g., 1, 2, 4, 8, 16, ... slots), depending on the SCS. Each slot may include a variable number of symbol periods (e.g., 7 or 14 symbols), depending on the SCS. An index may be assigned to the symbol period in each slot. A mini slot (which may be referred to as a subslot structure) refers to a transmission time interval having a duration less than a slot (e.g., 2, 3, or 4 symbols). Each symbol in a slot may indicate a link direction (e.g., DL, UL, or flexible) for data transmission, and the link direction for each subframe may be dynamically switched. The link direction may be based on the slot format. Each time slot may include DL / UL data and DL / UL control information.

[0052] Example Random Access Procedure

[0053] Figure 44 is a call flow diagram 400 illustrating an example four-step RACH procedure in accordance with certain aspects of the present disclosure. A first message (MSG1) may be sent from a UE 104 to a BS 102 on a physical random access channel (PRACH). In this case, MSG1 may include only a RACH preamble 404. BS 102 may respond with a random access response (RAR) message 406 (MSG2), which may include an identifier (ID) of the RACH preamble, a timing advance (TA), an uplink grant, a cell radio network temporary identifier (C-RNTI), and a backoff indicator (BI). MSG2 may include a PDCCH communication including control information regarding subsequent communications on a PDSCH (e.g., scheduling reception of subsequent communications on the PDSCH), as illustrated. In response to MSG2, MSG3 is transmitted from UE 104 to BS 102 on a PUSCH 408. MSG3 may include one or more of an RRC connection request, a tracking area update request, a system information request, a location fix or location signal request, or a scheduling request. BS 102 then responds with MSG4, which may include a contention resolution message 410. In some cases, UE 104 may also receive system information 402 (e.g., also referred to herein as a system information message) indicating various communication parameters that may be used by UE 104 to communicate with BS 102.

[0054] Exemplary uplink aspects for NB-IoT

[0055] Certain aspects of the present disclosure relate to techniques for using a coded modulation scheme (MCS) associated with a modulation order of at least four for narrowband Internet of Things (IoT) communications. One type of modulation and coding scheme (MCS) is 16 quadrature amplitude modulation (16-QAM), which may be configurable for several use cases. For example, 16-QAM-based transmissions may be configurable for certain narrowband physical uplink shared channel (NPUSCH) transmissions but not for other transmissions. When 16-QAM is not configurable, a legacy MCS and corresponding TBS may be used. Certain aspects of the present disclosure relate to uplink transmissions (e.g., via NPUSCH) using an MCS associated with a modulation order of at least four, such as 16-QAM.

[0056] Figure 5 5 is a flow diagram illustrating example operations 500 for wireless communications, in accordance with certain aspects of the present disclosure. Operations 500 may be performed, for example, by a BS, such as BS 110a in wireless communication network 100, for example.

[0057] Operation 500 may be implemented as a processor on one or more processors (e.g., Figure 2 In addition, signal transmission and reception by the BS in operation 500 may be performed by, for example, one or more antennas (e.g., Figure 2 In some aspects, signal transmission and / or reception by the BS may be achieved by obtaining and / or outputting signals via a bus interface of one or more processors (eg, controller / processor 240).

[0058] Operations 500 may begin at block 505, where the BS generates a configuration message for NB-IoT communications indicating one or more parameters for uplink transmissions using an MCS associated with a modulation order of at least four (e.g., 16-QAM). The configuration message may be any combination of higher layer RRC / MAC-CE (e.g., semi-static) signaling and physical layer DCI (e.g., dynamic) signaling. At block 510, the BS transmits the configuration message, and at block 515, receives the uplink transmission according to the one or more parameters.

[0059] Figure 6 6 is a flow diagram illustrating example operations 600 for wireless communications, in accordance with certain aspects of the present disclosure. Operations 600 may be performed, for example, by a UE (eg, such as UE 120a in wireless communication network 100).

[0060] Operation 600 may be implemented as a processor on one or more processors (e.g., Figure 2 In addition, signal transmission and reception by the UE in operation 600 may be performed by one or more antennas (e.g., Figure 2 In some aspects, signal transmission and / or reception by the UE may be achieved by obtaining and / or outputting signals via a bus interface of one or more processors (eg, controller / processor 280).

[0061] Operations 600 may begin at block 605, where the UE receives a configuration message for NB-IoT communications indicating one or more parameters for uplink transmission using an MCS associated with a modulation order of at least four (e.g., 16-QAM). At block 610, the UE generates the uplink transmission, and at block 615, sends the uplink transmission according to the one or more parameters.

[0062] As described herein, a base station may configure NPUSCH with 16-QAM in certain configuration scenarios. As an example, if NPUSCH (e.g., for normal data transmission) is associated with a cell-C-RNTI except during random access, the NPUSCH transmission may be configured with 16-QAM. As an example, one or more fields of each of a plurality of candidate DCIs may differ based on the type of radio network temporary identifier (RNTI) associated with the candidate DCI. That is, the DCI fields and their interpretations may be different for different types of RNTIs (e.g., SPS C-RNTI) associated with the DCI. For example, depending on the RNTI associated with the DCI, bits in the bit stream of the DCI may be interpreted differently. For example, if the DCI is associated with RNTI1, bits b0-b3 of the DCI may represent (e.g., decoded to indicate) the MCS and bits b4-b7 may represent the number of repetitions. However, for a DCI associated with RNTI2, b0-b2 may represent (eg, be decoded to indicate) MCS, bits b3-b5 of the DCI may indicate the number of repetitions, and bits b6-b7 may represent power control.

[0063] 16-QAM may be configurable only for certain types of NPUSCH. For example, 16-QAM may be configurable only for certain types of information (e.g., via DCI), but not for other types of information (e.g., if the DCI is associated with an SPS C-RNTI, 16-QAM may not be configurable). In other words, the configuration message may include a DCI selected from a subset of candidate DCIs (e.g., candidate DCIs that are configurable for any MCS associated with a modulation order of at least two).

[0064] In some implementations, 16-QAM may not be configurable for NPUSCH transmissions. For example, as described, 16-QAM may not be configurable for NPUSCH associated with a semi-persistent scheduling (SPS) C-RNTI (uplink SPS for buffer status reporting (BSR)). 16-QAM may also not be configurable for: NPUSCH format 2 transmissions (e.g., for acknowledgement (ACK) / negative ACK (NACK) / scheduling request (SR)), NPUSCH with subcarrier spacing Δf=3.75kHz (e.g., provided by a random access response (RAR)), non-early data transmission (EDT) message 3 (MSG3) NPUSCH in response to a random access response, and NPUSCH scheduled by a narrowband physical downlink control channel (NPDCCH) in a common search space. As an example, 16-QAM may be configurable only for certain subcarrier spacing configurations (e.g., 15KHz), but not for other subcarrier spacing configurations (e.g., 3.75KHz). In other words, there may be separate configurability via higher layer signaling for implementing 16-QAM for different types of NPUSCH transmissions.EDT is a feature in which a UE may be given an uplink (UL) grant for transmitting data in MSG3 of a random access procedure.

[0065] In certain aspects, whether to configure 16-QAM-based NPUSCH may depend on the number of transport blocks scheduled by the DCI. In certain implementations, a single DCI may schedule multiple transport blocks (TBs) (e.g., the TB number field N). TB >1). In some aspects, 16QAM-based NPUSCH can be used only in N TB = 1, and the old NPUSCH (e.g., transmitted via Qm = 2) is configurable for N TB >1 may be configurable. In other words, the configurability of 16-QAM may depend on the number of configured transport blocks (N TB ).

[0066] In certain aspects, 16-QAM may be configurable for preconfigured uplink resources (PUR). PUR generally refers to resources that may be preconfigured (e.g., via RRC signaling) for uplink transmission in the first message (MSG1) of a random access procedure, thereby allowing the UE to perform a random access procedure without having to complete a random access procedure involving four messages (e.g., a random access preamble message (MSG1), a random access response (RAR) message (MSG2), a contention request message (MSG3), and a contention response message (MSG4), as described with respect to Figure 4The PUR may allow data transmission in MSG1 for UEs that have a valid timing advance and can be pre-configured to transmit messages directly from idle mode. Dedicated RRC signaling may be used in the PUR configuration process.

[0067] Certain aspects of the present disclosure relate to fallback procedures. For example, a UE may be configured with a 16-QAM-based PUR configuration and a legacy PUR configuration (e.g., for uplink transmission using an MCS associated with a modulation order less than four (e.g., quadrature phase shift keying (QPSK))). The UE may fall back to the legacy PUR configuration when communication using the 16QAM-based PUR configuration fails. Alternatively, when communication using the 16QAM-based PUR configuration fails, the UE may fall back to using early data transmission (EDT) or a legacy RACH procedure. As described herein, EDT is a feature in which a UE may be given an UL grant for transmitting data in MSG3 of a random access procedure. In other words, the UE may determine that an uplink transmission using an MCS associated with a modulation order of at least four has failed. The UE may then transmit another uplink transmission in response to the determination and via one or more configuration parameters for another MCS associated with a modulation order less than four. The other uplink transmission may be performed via uplink resources of the EDT in a third message for another random access procedure, or may be a transmission after the random access procedure.

[0068] Certain aspects provide techniques for configuring 16-QAM for EDT. According to legacy procedures, during MSG1 and MSG3 transmissions of a random access procedure, the base station may not be able to determine whether the UE is capable of 16-QAM communications. For example, legacy EDT transmissions may be limited to 16-QAM depending on the content of the RAR message (MSG2). and QPSK. In certain aspects of the present disclosure, a dedicated narrowband physical random access channel (NPRACH) resource may be configured so that a 16-QAM capable UE may use it for random access, thereby indicating to the base station that the UE is capable of 16-QAM NPUSCH. If the UE uses resources associated with an MCS of 16-QAM for transmission of a random access preamble message (MSG1), the base station knows that the UE is 16-QAM capable and may configure the UE accordingly via a corresponding RAR message (MSG2) transmitted by the base station in response to the random access preamble message.

[0069] A UE with 16-QAM capability may be configured to transmit EDT using 16-QAM. For example, the UE may use a resource element containing MCS, TBS, and the number of resource elements linked to the 16-QAM RACH resource (N) in conjunction with an RAR indicator such as an MCS index. RU ) of the EDT-16QAM table. The interpretation of RAR can be defined separately for when 16-QAM EDT is enabled. In other words, if 16-QAM is configured, the EDT-16-QAM table can be used to interpret the MCS, TBS, and N RU bits. In some cases, for EDT, the table allows the UE to select a TBS to which the MCS is mapped, or a limited smaller set of TBSs associated with a signaled TBS (e.g., mapped to the MCS). The base station can then blindly decode the (limited) different possibilities of TBSs that the UE can select. As used herein, a table generally refers to any indication of a mapping between parameters (e.g., a mapping between MCS and TBS, as described herein).

[0070] Fig. 7A 700 is a table illustrating the mapping between various parameters such as MCS and TBS. In some aspects, the EDT-16-QAM table may have fallback entries based on: QPSK-based transmission. For example, Fig. 7A As illustrated in , a table 700 that maps candidate MCS indices to modulation orders and TBSs may be configured at a UE. Table 700 may include entries for both an MCS associated with modulation order 2 and an MCS associated with modulation order 4, as shown.

[0071] As described herein, EDT-16-QAM may have entries for a modulation order of four and a modulation order of 2 for fallback within a 16-QAM EDT structure (e.g., retransmission during MSG3). In other words, an EDT-capable UE may receive an MCS entry in an EDT 16-QAM table from a RAR (e.g., MSG2 of a RACH) indicating a QPSK (Qm=2) based transmission. In some cases, if the UE determines that it has failed to transmit data using the MCS that it was instructed to use in the 16-QAM-EDT configuration, the UE may fall back to the legacy EDT / legacy RACH procedure. In other words, the UE may use the legacy EDT preamble to request, for example, a lower MCS / TBS configuration, or abandon EDT all together and perform a 4-step RACH procedure to establish an RRC connection and transmit data in the legacy manner.

[0072] Certain aspects of the present disclosure relate to power control techniques for 16-QAM configurations. Currently, power control for NB-IoT is open loop. For example, there may not be power control commands for NPUSCH transmissions that are dynamically signaled via DCI. In addition, the formula used by legacy NB-IoT UEs to determine the transmit power of NPUSCH may not have the term Δ that varies with the modulation order. TF In certain aspects of the present disclosure, for 16-QAM-based NPUSCH transmissions, power control items may be implemented for use by NB-IoT UEs supporting 16-QAM to determine the transmit power of the NPUSCH. For example, the closed-loop power control item (f c ), the UE takes the closed-loop power control term into account when determining the transmit power of the NPUSCH transmission. As another example, one or more specific open-loop power control terms (e.g., a specific nominal power term P0 and / or a specific path loss compensation term α) may be configured by a higher layer (e.g., via RRC signaling) for 16-QAM-based transmission. The one or more specific open-loop power control terms may be different from the legacy configuration using an MCS with a modulation order of, for example, 2.

[0073] In certain aspects of the present disclosure, a power control term Δ may be introduced that varies with the modulation order (QPSK / BPSK). TF In other words, Δ TF Can be used to adjust transmit power depending on whether 16-QAM, QPSK, or binary phase shift keying (BPSK) is configured. In certain aspects, if the MCS entry indicates QPSK (or any MCS associated with a modulation order less than four), then Δ TF may not exist in the power control equation. In this way, the introduction of a new term in the power control equation can be backward compatible with legacy UEs. In other words, legacy UEs can continue to assume that there is no f when determining the uplink transmit power. c or Δ TF .

[0074] Certain aspects of the present disclosure relate to scheduling constraints for 16-QAM configurations. NPUSCH based on 16-QAM may be best suited for good channel conditions. As a result, only certain resource allocation configurations (e.g., number of subcarriers (n)) relative to the legacy (e.g., using an MCS of modulation order 2) may be possible. sc ), the number of resource units (N RU ), number of repetitions (N rep )) may be configurable and may be signaled for use with 16-QAM.

[0075] Figure 7BCandidate configuration parameters according to certain aspects of the present disclosure are explained. In some aspects, a resource allocation configuration for an MCS (e.g., 16-QAM) with a modulation order (Qm) of at least 4 may be a subset of possible or allowed configurations in the legacy style (e.g., using an MCS with a modulation order of 2). For example, as illustrated, an MCS with a Qm of 2 may be configurable with one of the available candidate configuration parameters 1-5. As an example, the candidate configuration parameters may include a candidate subcarrier spacing parameter, a candidate number of repetitions, or a candidate number of subcarriers parameter. On the other hand, 16-QAM may be configured with only a subset of the candidate configuration parameters (e.g., configuration parameters 3-5).

[0076] In some aspects, the NPUSCH is only sent if there is one repetition configured for the NPUSCH or the number of repetitions is less than a threshold (e.g., N rep 16-QAM can only be configured when the modulation order Q is 1). A large number of repetitions means less than ideal channel quality, which may not be suitable for 16-QAM modulation with higher data rates than, for example, QPSK. As another example, 16-QAM can only be configured if full physical resource block (PRB) allocation is configured. In other words, for modulation order Q m =4(16QAM), span(Q m ,n sc ,N RU ,N rep ) may have a higher number of effective combinations than the old (Q m =2). This can be expressed in a specification using any combination of layer 1 (eg, DCI), higher layer (eg, RRC) signaling and joint valid combinations defined in the standard.

[0077] Certain aspects relate to techniques for signaling an MCS / TBS table for a 16-QAM configuration. Conventionally, there may be a single MCS / TBS table for NPUSCH with a table for Q m =2 (e.g., QPSK). In certain aspects of the present disclosure, in order to implement 16-QAM, a m =2 and Q m =4 a table of entries for both, such as Figure 6 The first few entries in the MCS table can correspond to Q m =2, and the subsequent entries can correspond to Q m =4.

[0078] In certain aspects of the present disclosure, the UE may be configured with different tables for different MCSs (e.g., 16-QAM) (e.g., defined in the standard and stored in the UE's memory), and may determine which MCS and TBS table to use to interpret the MCS entry signaled by DCI. For example, the MCS and TBS table to be used may be semi-statically configured by RRC signaling or via DCI signaling.

[0079] Certain aspects of the present disclosure relate to the joint encoding of MCS and one or more configuration parameters. For example, the DCI may implicitly indicate the MCS and TBS table to be used to interpret the MCS index. That is, the UE may read the field (set of fields) that is independently signaled in the DCI. Depending on the value of this / these fields, the UE may determine the MCS / TBS table to be used and interpret other bits in the DCI based on the determination. As an example, conventionally, the number of subcarriers n sc The same signaling method can be used regardless of other bits in the DCI. If the number of subcarriers indicated by this field is higher than a threshold (e.g., n sc =6), the UE can infer that the 16-QAM MCS / TBS table is to be used; otherwise, the UE can infer that the legacy MCS / TBS table is to be used (and the legacy DCI interpretation of the other entries). Similarly, separate fields that imply the MCS and TBS table to be used can be used to indicate N rep For example, N indicates that one repetition is used for uplink transmission. rep This implies using the MCS / TBS table for 16-QAM and the attendant interpretation of the remaining DCI bits.

[0080] Certain aspects of the present disclosure relate to signaling of DCI. For example, depending on whether the UE is expected to transmit NPUSCH based on 16-QAM, the interpretation of (some) DCI bits in a DCI format (e.g., DCI format N0) may be different from the old style. Alternatively, a separate DCI format with potentially different DCI sizes may be introduced. Certain aspects provide techniques for jointly encoding MCS and configuration parameters (such as, number of repetitions). As described herein, entries for higher MCS (e.g., MCS associated with a modulation order of at least four) are used for various configuration parameters (such as, N rep ,n sc ,N RU) may have fewer jointly valid options. As an example, if the MCS entry (e.g., in the MCS table to be used) indicates 16-QAM, the number of bits used for the number of repetitions field may be reduced (e.g., from 3 bits to, for example, 1 or 0 bits). In other words, since the UE knows that only a limited number of repetitions are allowed for 16-QAM, the number of candidate repetitions may be reduced, thereby allowing a reduction in the number of bits used for the number of repetitions field. This may free up bits in the DCI design to signal other 16-QAM-specific L1 control parameters, such as 2 or 3-bit closed-loop power control parameters for NPUSCH, as described herein. Similar approaches may be implemented for other fields, such as encoding a resource assignment field (e.g., indicating the number of resource units (RUs)) and / or a subcarrier indication field jointly with the MCS. Which DCI field (set of DCI fields) is jointly encoded may depend on whether the MCS / TBS table is configured via RRC or implicitly signaled by the DCI. In some examples, for implicit signaling via DCI, the independent fields based on which the MCS / TBS table is determined may not be jointly encoded with the MCS.

[0081] As an example, if the MCS field (e.g., represented by bits b0-b3 of the message) indicates that Q m =2, then bits b4-b6 of the message may indicate the number of repetitions. Otherwise (e.g., the MCS field indicates that Q m =4), bit b4 may indicate the number of repetitions to be used and bits b5-b6 may indicate the closed-loop power control parameter f to be used c .

[0082] Figure 8 The following describes operations that may include being configured to perform the techniques disclosed herein (such as Figure 5 and 6 800 includes a processing system 802 coupled to a transceiver 808 (e.g., a transmitter and / or a receiver). The transceiver 808 is configured to transmit and receive signals for the communication device 800 (such as the various signals described herein) via an antenna 810. The processing system 802 may be configured to perform processing functions for the communication device 800, including processing signals received and / or to be transmitted by the communication device 800.

[0083] The processing system 802 includes a processor 804 coupled to a computer readable medium / memory 812 via a bus 806. In some aspects, the computer readable medium / memory 812 is configured to store a program that, when executed by the processor 804, causes the processor 804 to execute Figure 5 and6 812 or instructions (e.g., computer executable code) for performing the operations explained in or other operations of the various technologies for NB-IoT communications discussed herein. In some aspects, the computer-readable medium / memory 812 stores code 814 for receiving / transmitting / sending; code 816 for generating; and code 818 for determining. In some aspects, the processor 804 has a circuit system configured to implement the code stored in the computer-readable medium / memory 812. The processor 804 includes a circuit system 820 for receiving / transmitting / sending; a circuit system 822 for generating; and a circuit system 824 for determining.

[0084] Example aspects

[0085] Aspect 1. A method for wireless communication, comprising: receiving a configuration message for narrowband Internet of Things (NB-IoT) communications, the configuration message indicating one or more parameters for an uplink transmission using a modulation and coding scheme (MCS) associated with a modulation order of at least four; generating the uplink transmission; and sending the uplink transmission according to the one or more parameters.

[0086] Aspect 2. The method of aspect 1, wherein the uplink transmission is performed via a preconfigured uplink resource (PUR) in a first message of a random access procedure.

[0087] Aspect 3. The method of aspect 2, wherein the configuration message is received via radio resource control (RRC) signaling, the radio resource control (RRC) signaling indicating at least one parameter associated with a PUR to be used for uplink transmission using an MCS associated with a modulation order of at least four.

[0088] Aspect 4. The method of any one of Aspects 2 to 3, wherein the configuration message indicates: a PUR for uplink transmissions using an MCS associated with a modulation order of at least four; and other PURs for other uplink transmissions, wherein the other uplink transmissions use another MCS associated with a modulation order less than four.

[0089] Aspect 5. The method of aspect 4 further includes: determining that uplink transmission using an MCS associated with a modulation order of at least four has failed; and transmitting the other uplink transmission using the other MCS in response to the determination and via a first message of another random access procedure.

[0090] Aspect 6. A method as in any one of Aspects 2 to 5, wherein the configuration message indicates a PUR for uplink transmission using an MCS associated with a modulation order of at least four, the method further comprising: determining that uplink transmission using an MCS associated with a modulation order of at least four has failed; and transmitting another uplink transmission using another MCS in response to the determination, the other uplink transmission being during a third message of another random access procedure or being a transmission after the random access procedure.

[0091] Aspect 7. The method of aspect 1, wherein the uplink transmission is performed via uplink resources for early data transmission (EDT) in a third message of a random access procedure.

[0092] Aspect 8. The method of aspect 7 further includes: transmitting a random access preamble message of the random access procedure using resources indicating to the base station that the UE supports an MCS associated with a modulation order of at least four, wherein the configuration message includes a random access response message transmitted in response to the random access preamble message.

[0093] Aspect 9. The method of aspect 8, wherein the indication of the one or more parameters in the random access response message is interpreted via a table associated with the MCS.

[0094] Aspect 10. The method of aspect 9, wherein the table maps each of a plurality of candidate MCSs to at least one transport block size (TBS) selectable by the UE.

[0095] Aspect 11. The method of any one of aspects 9 to 10, wherein the table further comprises one or more configuration parameters for another MCS associated with a modulation order less than four.

[0096] Aspect 12. The method of any one of Aspects 9 to 11 further includes: determining that an uplink transmission using an MCS associated with a modulation order of at least four has failed; and transmitting another uplink transmission in response to the determination and via one or more configuration parameters for another MCS associated with a modulation order less than four, wherein the other uplink transmission is performed via uplink resources of an EDT in a third message for another random access procedure or is a transmission after the random access procedure.

[0097] Aspect 13. The method of any one of Aspects 1 to 12 further includes: receiving, via downlink control information (DCI), an indication of a power control parameter for an uplink transmission using an MCS associated with a modulation order of at least four; and determining a transmit power for the uplink transmission based on the power control parameter.

[0098] Aspect 14. The method of any one of aspects 1 to 13, further comprising: determining a transmit power of the uplink transmission based on one or more power control items specific to an MCS to be used for the uplink transmission.

[0099] Aspect 15. The method of any one of Aspects 1 to 14, further comprising: receiving an indication of a table to be used for interpreting the indication of the one or more parameters in the configuration message.

[0100] Aspect 16. The method of aspect 15, wherein the indication of the table is received via RRC signaling or downlink control information (DCI).

[0101] Aspect 17. A method as in any one of Aspects 15 to 16, wherein if the MCS of the uplink transmission has a modulation order of four, each of the one or more DCI fields of the configuration message indicating the one or more parameters has fewer bits than a field indicating one or more parameters for another uplink transmission having a modulation order less than four.

[0102] Aspect 18. The method of any one of aspects 1 to 17, wherein the configuration message comprises a DCI, and wherein the method further comprises: determining a table to be used for interpreting an indication of the one or more parameters based on one or more other parameters indicated by the DCI.

[0103] Aspect 19. The method of aspect 18, wherein the one or more other parameters include at least one of: an indication of a number of subcarriers associated with the uplink transmission, or a number of repetitions to be used for the uplink transmission.

[0104] Aspect 20. The method of any one of aspects 18 to 19, wherein the table maps each of a plurality of candidate MCSs to at least one transport block size (TBS).

[0105] Aspect 21. The method of any one of aspects 1 to 20, wherein the one or more parameters are constrained to be selected from a subset of candidate configuration parameters that are configurable for any MCS associated with a modulation order of two or higher.

[0106] Aspect 22. The method of any one of Aspects 1 to 21, wherein the one or more parameters include a subcarrier spacing parameter selected from a subset of candidate subcarrier spacing parameters, the subset of candidate subcarrier spacing parameters being candidate subcarrier spacing parameters greater than a subcarrier spacing threshold, the subcarrier spacing threshold corresponding to a subcarrier spacing allowed for transmission using any MCS associated with a modulation order of two.

[0107] Aspect 23. A method as in any of Aspects 1 to 22, wherein the one or more parameters include a repetition number parameter selected from a subset of candidate repetition number parameters, the subset of candidate repetition number parameters being candidate repetition number parameters less than a repetition number threshold, the repetition number threshold corresponding to a repetition number allowed for transmission using any MCS associated with a modulation order of two.

[0108] Aspect 24. The method of any one of aspects 1 to 23, wherein the one or more parameters include a subcarrier number parameter selected from a subset of candidate subcarrier number parameters, the subset of candidate subcarrier number parameters being candidate subcarrier number parameters greater than a subcarrier number threshold.

[0109] Aspect 25. The method of any one of Aspects 1 to 24, wherein the MCS comprises 16-quadrature amplitude modulation (16-QAM).

[0110] Aspect 26. A method as in any of Aspects 1 to 25, wherein one or more fields of each of a plurality of candidate DCIs differ based on a type of a radio network temporary identifier (RNTI) associated with the candidate DCI, and wherein the configuration message includes a DCI selected from a subset of the plurality of candidate DCIs, the plurality of candidate DCIs being configurable for any MCS associated with a modulation order of at least two.

[0111] Aspect 27. A method as described in any one of Aspects 1 to 26, wherein: the configuration message includes an MCS field; if one or more bits of the MCS field indicate that an MCS associated with a modulation order less than four is to be used, then multiple bits of the configuration message indicate a first parameter associated with the uplink transmission; and if the one or more bits of the MCS field indicate an MCS associated with a modulation order of at least four, then the multiple bits indicate the first parameter and one or more second parameters associated with the uplink transmission.

[0112] Aspect 28. A method as in any one of Aspects 1 to 27, wherein the configuration message includes a DCI, and wherein the MCS is configured via the DCI if the number of transport blocks configured via the DCI is less than a threshold, the threshold corresponding to the number of transport blocks that can be configured by the DCI that is also configured for any MCS associated with a modulation order of two.

[0113] Aspect 29. A method for wireless communications, comprising: generating a configuration message for narrowband Internet of Things (NB-IoT) communications, the configuration message indicating one or more parameters for an uplink transmission using a modulation and coding scheme (MCS) associated with a modulation order of at least four; transmitting the configuration message; and receiving the uplink transmission based on the one or more parameters.

[0114] Aspect 30. The method of aspect 29, wherein the uplink transmission is performed via a preconfigured uplink resource (PUR) in a first message of a random access procedure.

[0115] Aspect 31. A method as in Aspect 30, wherein the configuration message is received via radio resource control (RRC) signaling, the radio resource control (RRC) signaling indicating at least one parameter associated with a PUR to be used for uplink transmission using an MCS associated with a modulation order of at least four.

[0116] Aspect 32. A method as in any one of Aspects 30 to 31, wherein the configuration message indicates: a PUR for uplink transmissions using an MCS associated with a modulation order of at least four; and other PURs for other uplink transmissions, wherein the other uplink transmissions use another MCS associated with a modulation order less than four.

[0117] Aspect 33. The method of aspect 32 further includes: if the uplink transmission fails, receiving the other uplink transmission using the other MCS, the other uplink transmission being performed via a first message of another random access procedure.

[0118] Aspect 34. A method as in any one of Aspects 30 to 33, wherein the configuration message indicates a PUR for uplink transmission using an MCS associated with a modulation order of at least four, the method further comprising: if the uplink transmission fails, transmitting another uplink transmission using the other MCS, the other uplink transmission being transmitted during a third message of another random access procedure or after the random access procedure.

[0119] Aspect 35. The method of any one of aspects 29 to 34, wherein the uplink transmission is performed via uplink resources for early data transmission (EDT) in a third message of a random access procedure.

[0120] Aspect 36. The method of aspect 35 further includes: receiving a random access preamble message of the random access procedure using resources indicating that the UE supports an MCS associated with a modulation order of at least four, wherein the configuration message includes a random access response message transmitted in response to the random access preamble message.

[0121] Aspect 37. The method of aspect 36, wherein the indication of the one or more parameters in the random access response message is interpreted via a table associated with the MCS.

[0122] Aspect 38. The method of aspect 37, wherein the table maps each of a plurality of candidate MCSs to at least one transport block size (TBS).

[0123] Aspect 39. A method as in any one of Aspects 37 to 38, wherein the table further includes one or more configuration parameters for another MCS associated with a modulation order less than four, the method further comprising: if the uplink transmission fails, receiving another uplink transmission, the other uplink transmission being performed via one or more configuration parameters for the other MCS.

[0124] Aspect 40. The method of any one of Aspects 37 to 39 further includes: determining that an uplink transmission using an MCS associated with a modulation order of at least four has failed; and if the uplink transmission has failed, receiving another uplink transmission, the other uplink transmission being performed via one or more configuration parameters for another MCS associated with a modulation order less than four, wherein the other uplink transmission is performed via uplink resources of an EDT in a third message for another random access procedure or is a transmission after the random access procedure.

[0125] Aspect 41. The method of any one of aspects 29 to 40, further comprising transmitting, via downlink control information (DCI), an indication of a power control parameter for uplink transmissions using an MCS associated with a modulation order of at least four.

[0126] Aspect 42. The method of any one of Aspects 29 to 41, further comprising: transmitting an indication of a table to be used for interpreting the indication of the one or more parameters in the configuration message.

[0127] Aspect 43. The method of aspect 42, wherein the indication of the table is transmitted via RRC signaling or downlink control information (DCI).

[0128] Aspect 44. A method as in any of Aspects 42 to 43, wherein if the MCS of the uplink transmission has a modulation order of four, each of the one or more DCI fields of the configuration message indicating the one or more parameters has fewer bits than a field indicating one or more parameters for another uplink transmission having a modulation order less than four.

[0129] Aspect 45. The method of any one of aspects 29 to 44, wherein the configuration message comprises a DCI, and wherein the table to be used to interpret the indication of the one or more parameters is to be determined based on one or more other parameters indicated by the DCI.

[0130] Aspect 46. The method of aspect 45, wherein the one or more other parameters include at least one of: an indication of a number of subcarriers associated with the uplink transmission, or a number of repetitions to be used for the uplink transmission.

[0131] Aspect 47. The method of any one of Aspects 45 to 46, wherein the table maps each of a plurality of candidate MCSs to at least one transport block size (TBS).

[0132] Aspect 48. The method of any one of aspects 29 to 47, wherein the one or more parameters are constrained to be selected from a subset of candidate configuration parameters that are configurable for any MCS associated with a modulation order of two or higher.

[0133] Aspect 49. The method of any one of Aspects 29 to 48, wherein the one or more parameters include a subcarrier spacing parameter, the method further comprising: selecting the subcarrier spacing parameter from a subset of candidate subcarrier spacing parameters, the subset of candidate subcarrier spacing parameters being candidate subcarrier spacing parameters greater than a subcarrier spacing threshold, the subcarrier spacing threshold corresponding to a subcarrier spacing allowed for transmission using any MCS associated with a modulation order of two.

[0134] Aspect 50. A method as in any one of Aspects 29 to 49, wherein the one or more parameters include a repetition number parameter, the method further comprising: selecting the repetition number parameter from a subset of candidate repetition number parameters, the subset of candidate repetition number parameters being candidate repetition number parameters less than a repetition number threshold, the repetition number threshold corresponding to a repetition number allowed for transmission using any MCS associated with a modulation order of two.

[0135] Aspect 51. The method of any one of Aspects 29 to 50, wherein the one or more parameters include a subcarrier number parameter, the method further comprising: selecting the subcarrier number parameter from a subset of candidate subcarrier number parameters, the subset of candidate subcarrier number parameters being candidate subcarrier number parameters greater than a subcarrier number threshold.

[0136] Aspect 52. The method of any one of Aspects 29 to 51, wherein the MCS comprises 16-quadrature amplitude modulation (16-QAM).

[0137] Aspect 53. A method as in any of Aspects 29 to 52, wherein the configuration message includes a DCI, wherein one or more fields of each of a plurality of candidate DCIs differ based on a type of RNTI associated with the candidate DCI, and wherein the method further comprises selecting the DCI from a subset of the plurality of candidate DCIs, the plurality of candidate DCIs being configurable for any MCS associated with a modulation order of at least two.

[0138] Aspect 54. A method as in any one of Aspects 29 to 53, wherein: the configuration message includes an MCS field; if one or more bits of the MCS field indicate that an MCS associated with a modulation order less than four is to be used, then multiple bits of the configuration message indicate a first parameter associated with the uplink transmission; and if the one or more bits of the MCS field indicate an MCS associated with a modulation order of at least four, then the multiple bits indicate the first parameter and one or more second parameters associated with the uplink transmission.

[0139] Aspect 55. A method as in any one of Aspects 29 to 54, wherein the configuration message includes a DCI, and wherein the method further comprises: determining whether to configure an MCS associated with a modulation order of at least four via the DCI based on whether the number of transport blocks configured via the DCI is less than a threshold, the threshold corresponding to the number of transport blocks that can be configured by the DCI that can also configure any MCS associated with a modulation order of two.

[0140] The techniques described herein may be used for various wireless communication technologies, such as NR (e.g., 5G NR), 3GPP Long Term Evolution (LTE), Advanced LTE (LTE-A), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), Time Division Synchronous Code Division Multiple Access (TD-SCDMA), and other networks. The terms "network" and "system" are often used interchangeably. A CDMA network may implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, and the like. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95, and IS-856 standards. A TDMA network may implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA networks can implement radio technologies such as NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). cdma2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). NR is an emerging wireless communication technology under development.

[0141] In 3GPP, the term "cell" may refer to the coverage area of ​​a B node (NB) and / or a NB subsystem serving the coverage area, depending on the context in which the term is used. In NR systems, the terms "cell" and BS, next-generation B node (gNB or g B node), access point (AP), distributed unit (DU), carrier, or transmission reception point (TRP) may be used interchangeably. The BS may provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. A macro cell may cover a relatively large geographic area (e.g., a radius of several thousand meters) 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), UEs of users in a residence, etc.). 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.

[0142] UE may also be referred to as a mobile station, terminal, access terminal, subscriber unit, station, customer premises equipment (CPE), cellular phone, smart phone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet computer, camera, gaming device, netbook, smartbook, ultrabook, appliance, medical device or medical equipment, biometric sensor / device, wearable device (such as smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.)), entertainment device (e.g., music device, video device, satellite radio, etc.), transportation component or sensor, smart meter / sensor, industrial manufacturing equipment, global positioning system device, or any other suitable device configured to communicate via wireless or wired medium. Some UEs may be considered machine type communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which can communicate with a BS, another device (e.g., a remote device), or some other entity. A wireless node can provide connectivity for or to a network (e.g., a wide area network (such as the Internet) or a cellular network), for example, via a wired or wireless communication link. Some UEs may be considered Internet of Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.

[0143] In some examples, access to the air interface may be scheduled. A scheduling entity (e.g., BS) allocates resources for communication between some or all devices and equipment within its service area or cell. A scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communications, subordinate entities utilize resources allocated by the scheduling entity. A base station is not the only entity that can be used as a scheduling entity. In some examples, a UE may act as a scheduling entity, and may schedule resources for one or more subordinate entities (e.g., one or more other UEs), and other UEs may utilize resources scheduled by the UE for wireless communication. In some examples, a UE may act as a scheduling entity in a peer-to-peer (P2P) network and / or in a mesh network. In a mesh network example, UEs may communicate directly with each other in addition to communicating with a scheduling entity.

[0144] Each method disclosed herein includes one or more steps or actions for implementing the method. These method steps and / or actions can be interchangeable with each other without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and / or use of specific steps and / or actions can be changed without departing from the scope of the claims.

[0145] As used herein, a phrase referring to "at least one of" a list of items refers to any combination of those 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, as well as any combination with multiples of the same elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0146] As used herein, the term "determining" encompasses a wide variety of actions. For example, "determining" may include calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, a database, or another data structure), ascertaining, and the like. Also, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), and the like. Also, "determining" may include resolving, selecting, choosing, establishing, and the like.

[0147] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be easily understood by those skilled in the art, and the universal principles defined herein can be applied to other aspects. Thus, the claims are not intended to be limited to the various aspects shown herein, but should be granted the full scope consistent with the language of the claims, wherein the singular reference to the element is not intended to mean "there is and only one" (unless specifically stated) but "one or more". Unless otherwise specifically stated, the term "some / some" refers to one or more. The elements of the various aspects described throughout this disclosure are all structural and functional equivalents currently or hereafter known to ordinary technicians in the art and are expressly incorporated herein by reference, and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be donated to the public, regardless of whether such disclosure is explicitly recorded in the claims. Any element of the claim should not be interpreted under the provisions of 35 USC§112(f), unless the element is explicitly stated using the phrase "device for..." or in the case of a method claim, the element is stated using the phrase "step for..."

[0148] The various operations of the methods described above may be performed by any suitable device capable of performing the corresponding functions. These devices may include various hardware and / or software components and / or modules, including but not limited to circuits, application specific integrated circuits (ASICs), or processors. Generally, where there are operations illustrated in the accompanying drawings, these operations may have corresponding paired device-plus-function components with similar numbers.

[0149] The various illustrative logical blocks, modules, and circuits described in conjunction with the present disclosure may be implemented or executed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0150] If implemented in hardware, an example hardware configuration may include a processing system in a wireless node. The processing system may be implemented using a bus architecture. Depending on the specific application and overall design constraints of the processing system, the bus may include any number of interconnecting buses and bridges. The bus may link together various circuits including a processor, a machine-readable medium, and a bus interface. The bus interface may be used to connect a network adapter, etc., to the processing system via the bus. The network adapter may be used to implement the signal processing functions of the PHY layer. In a user terminal (see Figure 1 ), a user interface (e.g., a keypad, display, mouse, joystick, etc.) may also be connected to the bus. The bus may also link various other circuits, such as timing sources, peripherals, voltage regulators, power management circuits, and the like, which are well known in the art and will not be described further. The processor may be implemented with one or more general and / or special purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuit systems capable of executing software. Those skilled in the art will recognize how to best implement the functionality described with respect to the processing system, depending on the specific application and the overall design constraints imposed on the overall system.

[0151] If implemented in software, each function may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. Software should be broadly interpreted to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or other. Computer-readable media include both computer storage media and communication media, which include any media that facilitate the transfer of computer programs from one place to another. The processor may be responsible for managing the bus and general processing, including executing software modules stored on a machine-readable storage medium. A computer-readable storage medium may be coupled to a processor so that the processor can read and write information from / to the storage medium. In an alternative, a storage medium may be integrated into a processor. As an example, a machine-readable medium may include a transmission line, a carrier modulated by data, and / or a computer-readable storage medium having instructions stored thereon that is separated from a wireless node, all of which may be accessed by a processor through a bus interface. Alternatively or additionally, a machine-readable medium or any part thereof may be integrated into a processor, such as a cache and / or a general register file, which may be the case. As an example, examples of machine-readable storage media may include RAM (random access memory), flash memory, ROM (read only memory), PROM (programmable read only memory), EPROM (erasable programmable read only memory), EEPROM (electrically erasable programmable read only memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage media, or any combination thereof. Machine-readable media may be implemented in a computer program product.

[0152] A software module may include a single instruction, or many instructions, and may be distributed over several different code segments, distributed between different programs, and distributed across multiple storage media. A computer-readable medium may include several software modules. These software modules include instructions that cause a processing system to perform various functions when executed by an apparatus such as a processor. These software modules may include a transmission module and a receiving module. Each software module may reside in a single storage device or may be distributed across multiple storage devices. As an example, when a triggering event occurs, a software module may be loaded into a RAM from a hard drive. During the execution of a software module, a processor may load some instructions into a cache to increase access speed. One or more cache lines may then be loaded into a general register file for execution by the processor. When describing the functionality of a software module as described below, it will be understood that such functionality is implemented by the processor when the processor executes instructions from the software module.

[0153] Likewise, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technology (such as infrared (IR), radio, and microwave), then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technology (such as infrared, radio, and microwave) is included in the definition of medium. Disk and disc, as used herein, include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Disks, where disks often reproduce data magnetically, and discs reproduce data optically with lasers. Thus, in some aspects, computer-readable media may include non-transitory computer-readable media (e.g., tangible media). Additionally, for other aspects, computer-readable media may include transient computer-readable media (e.g., signals). Combinations of the above should also be included within the scope of computer-readable media.

[0154] Thus, certain aspects may include a computer program product for performing the operations presented herein. For example, such a computer program product may include a computer-readable medium having stored (and / or encoded) thereon instructions that can be executed by one or more processors to perform the operations described herein, such as for performing the operations described herein and in Figure 5 and 6 Instructions for the operations explained in .

[0155] In addition, it should be appreciated that modules and / or other appropriate means for performing the methods and techniques described herein may be downloaded and / or otherwise obtained by a user terminal and / or base station where applicable. For example, such a device can be coupled to a server to facilitate the transfer of means for performing the methods described herein. Alternatively, the various methods described herein can be provided via a storage device (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or a floppy disk, etc.) so that once the storage device is coupled to or provided to a user terminal and / or base station, the device can obtain the various methods. In addition, any other suitable technology suitable for providing the methods and techniques described herein to a device may be utilized.

[0156] It will be understood that the claims are not limited to the precise configuration and components illustrated above. Various changes, substitutions and variations may be made in the arrangement, operation and details of the methods and apparatus described above without departing from the scope of the claims.

Claims

1. An apparatus for wireless communication, comprising: Memory; as well as one or more processors coupled to the memory, the memory and the one or more processors being configured to: receiving a configuration message for narrowband internet of things (NB-IoT) communications, the configuration message indicating one or more parameters for uplink transmission using a modulation and coding scheme (MCS) associated with a modulation order of at least four; generating the uplink transmission; as well as The uplink transmission is transmitted via a preconfigured uplink resource PUR in a first message of a random access procedure according to the one or more parameters.

2. The device according to claim 1, wherein: The configuration message is received via radio resource control, RRC signaling, the radio resource control, RRC signaling indicating at least one parameter associated with a PUR to be used for the uplink transmission using an MCS associated with a modulation order of at least four.

3. The device as claimed in claim 1, wherein: The configuration message indicates: a PUR for said uplink transmission using an MCS associated with a modulation order of at least four; as well as Other PURs for other uplink transmissions using another MCS associated with a modulation order less than four.

4. The device as claimed in claim 3, wherein: The memory and the one or more processors are further configured to: determining that the uplink transmission using an MCS associated with a modulation order of at least four failed; and In response to the determination and via a first message of another random access procedure, the other uplink transmission using the another MCS is transmitted.

5. The device as claimed in claim 3, wherein: The configuration message indicates a PUR for the uplink transmission using an MCS associated with a modulation order of at least four, and wherein the memory and the one or more processors are further configured to: determining that the uplink transmission using an MCS associated with a modulation order of at least four failed; and In response to the determination, another uplink transmission using the another MCS is transmitted, the other uplink transmission being during a third message of another random access procedure or being a transmission subsequent to the random access procedure.

6. The device according to claim 1, wherein: The memory and the one or more processors are further configured to transmit a second uplink transmission via uplink resources for an early data transmission (EDT) in a third message of a random access procedure.

7. The device according to claim 6, wherein: The memory and the one or more processors are further configured to transmit a random access preamble message of the random access procedure using resources that indicate to a base station that the device supports an MCS associated with a modulation order of at least four, wherein the configuration message includes a random access response message transmitted in response to the random access preamble message.

8. The device according to claim 7, wherein: The indication of the one or more parameters in the random access response message is interpreted via a table associated with the MCS.

9. The device of claim 8, wherein: The table maps each of a plurality of candidate MCSs to at least one transport block size TBS selectable by the device.

10. The device according to claim 8, wherein: The table further includes one or more configuration parameters for another MCS associated with a modulation order less than four.

11. The device of claim 8, wherein: The memory and the one or more processors are further configured to: determining that the second uplink transmission using an MCS associated with a modulation order of at least four failed; and A third uplink transmission is transmitted in response to the determination and via one or more configuration parameters for another MCS associated with a modulation order less than four, wherein the third uplink transmission is performed via uplink resources of an EDT in a third message for another random access procedure or is a transmission subsequent to the random access procedure.

12. The device of claim 1, wherein: The memory and the one or more processors are further configured to: receiving, via downlink control information (DCI), an indication of power control parameters for said uplink transmission using an MCS associated with a modulation order of at least four; and A transmit power for the uplink transmission is determined based on the power control parameter.

13. The device of claim 1, wherein: The memory and the one or more processors are further configured to determine a transmit power for the uplink transmission based on one or more power control items specific to the MCS to be used for the uplink transmission.

14. The device of claim 1, wherein: The memory and the one or more processors are further configured to receive an indication of a table to be used to interpret the indication of the one or more parameters in the configuration message.

15. The device of claim 14, wherein: The indication of the table is received via RRC signaling or downlink control information DCI.

16. The device of claim 14, wherein: If the MCS of the uplink transmission has a modulation order of four, each of the one or more DCI fields of the configuration message indicating the one or more parameters has fewer bits than a field indicating one or more parameters for another uplink transmission having a modulation order less than four.

17. The device of claim 1, wherein: The configuration message includes a DCI, and wherein the memory and the one or more processors are further configured to determine a table to be used to interpret an indication of the one or more parameters based on one or more other parameters indicated by the DCI.

18. The device of claim 17, wherein: The one or more other parameters include at least one of: an indication of a number of subcarriers associated with the uplink transmission, or a number of repetitions to be used for the uplink transmission.

19. The device of claim 17, wherein: The table maps each of a plurality of candidate MCSs to at least one transport block size TBS.

20. The device of claim 1, wherein: The one or more parameters are constrained to be selected from a subset of candidate configuration parameters that are configurable for any MCS associated with a modulation order of two or higher.

21. The device of claim 1, wherein: The one or more parameters include a subcarrier spacing parameter selected from a subset of candidate subcarrier spacing parameters, the subset of candidate subcarrier spacing parameters being candidate subcarrier spacing parameters greater than a subcarrier spacing threshold corresponding to a subcarrier spacing allowed for transmissions using any MCS associated with a modulation order of two.

22. The device of claim 1, wherein: The one or more parameters include a repetition number parameter selected from a subset of candidate repetition number parameters, the subset of candidate repetition number parameters being candidate repetition number parameters less than a repetition number threshold, the repetition number threshold corresponding to a number of repetitions allowed for transmissions using any MCS associated with a modulation order of two.

23. The device of claim 1, wherein: The one or more parameters include a number of subcarriers parameter selected from a subset of candidate number of subcarriers parameters, the subset of candidate number of subcarriers parameters being candidate number of subcarriers parameters that are greater than a subcarrier number threshold.

24. The device of claim 1, wherein: One or more fields of each of a plurality of candidate DCIs differ based on a type of a radio network temporary identifier RNTI associated with the candidate DCI, and wherein the configuration message includes a DCI selected from a subset of the plurality of candidate DCIs, the plurality of candidate DCIs being configurable for any MCS associated with a modulation order of at least two.

25. The apparatus of claim 1, wherein: The configuration message includes an MCS field; If the one or more bits of the MCS field indicate that an MCS associated with a modulation order less than four is to be used, the plurality of bits of the configuration message indicate a first parameter associated with the uplink transmission; and If the one or more bits of the MCS field indicate an MCS associated with a modulation order of at least four, the plurality of bits indicate the first parameter and one or more second parameters associated with the uplink transmission.

26. The device of claim 1, wherein: The configuration message includes a DCI, and wherein the MCS is configured via the DCI if the number of transport blocks configured via the DCI is less than a threshold, the threshold corresponding to the number of transport blocks configured by the DCI that can also be configured for any MCS associated with a modulation order of two.

27. An apparatus for wireless communication, comprising: Memory; as well as one or more processors coupled to the memory, the memory and the one or more processors being configured to: generating a configuration message for narrowband internet of things (NB-IoT) communications, the configuration message indicating one or more parameters for uplink transmission using a modulation and coding scheme (MCS) associated with a modulation order of at least four; transmitting the configuration message; as well as The uplink transmission is received via a preconfigured uplink resource PUR in a first message of a random access procedure according to the one or more parameters.

28. The apparatus of claim 27, wherein: The memory and the one or more processors are further configured to receive a second uplink transmission via uplink resources for an early data transmission (EDT) in a third message of a random access procedure.

29. The device of claim 27, wherein: The memory and the one or more processors are further configured to transmit, via downlink control information (DCI), an indication of a power control parameter for the uplink transmission using an MCS associated with a modulation order of at least four.

30. The apparatus of claim 27, wherein the memory and the one or more processors are further configured to transmit an indication of a table to be used to interpret the indication of the one or more parameters in the configuration message.

31. The apparatus of claim 27, wherein: The one or more parameters are constrained to be selected from a subset of candidate configuration parameters that are configurable for any MCS associated with a modulation order of two or higher.

32. A method for wireless communication, comprising: receiving a configuration message for narrowband internet of things (NB-IoT) communications, the configuration message indicating one or more parameters for uplink transmission using a modulation and coding scheme (MCS) associated with a modulation order of at least four; generating the uplink transmission; as well as The uplink transmission is transmitted via a preconfigured uplink resource PUR in a first message of a random access procedure according to the one or more parameters.

33. The method of claim 32, further comprising: receiving, via downlink control information (DCI), an indication of a power control parameter for said uplink transmission using an MCS associated with a modulation order of at least four; as well as A transmit power for the uplink transmission is determined based on the power control parameter.

34. The method of claim 32, further comprising: A transmit power for the uplink transmission is determined based on one or more power control items specific to the MCS to be used for the uplink transmission.

35. The method of claim 32, wherein: Further including: An indication of a table is received, the table to be used to interpret the indication of the one or more parameters in the configuration message.

36. The method of claim 35, wherein: The indication of the table is received via RRC signaling or downlink control information DCI.

37. The method of claim 35, wherein: If the MCS of the uplink transmission has a modulation order of four, each of the one or more DCI fields of the configuration message indicating the one or more parameters has fewer bits than a field indicating one or more parameters for another uplink transmission having a modulation order less than four.

38. The method of claim 32, wherein: The configuration message comprises a DCI, and wherein the method further comprises determining a table to be used for interpreting an indication of the one or more parameters based on one or more other parameters indicated by the DCI.

39. The method of claim 38, wherein: The one or more other parameters include at least one of: an indication of a number of subcarriers associated with the uplink transmission, or a number of repetitions to be used for the uplink transmission.

40. The method of claim 38, wherein: The table maps each of a plurality of candidate MCSs to at least one transport block size TBS.

41. The method of claim 32, wherein: The one or more parameters are constrained to be selected from a subset of candidate configuration parameters that are configurable for any MCS associated with a modulation order of two or higher.

42. The method of claim 32, wherein: The one or more parameters include a subcarrier spacing parameter selected from a subset of candidate subcarrier spacing parameters, the subset of candidate subcarrier spacing parameters being candidate subcarrier spacing parameters greater than a subcarrier spacing threshold corresponding to a subcarrier spacing allowed for transmissions using any MCS associated with a modulation order of two.

43. The method of claim 32, wherein: The one or more parameters include a repetition number parameter selected from a subset of candidate repetition number parameters, the subset of candidate repetition number parameters being candidate repetition number parameters less than a repetition number threshold, the repetition number threshold corresponding to a number of repetitions allowed for transmissions using any MCS associated with a modulation order of two.

44. The method of claim 32, wherein: The one or more parameters include a number of subcarriers parameter selected from a subset of candidate number of subcarriers parameters, the subset of candidate number of subcarriers parameters being candidate number of subcarriers parameters that are greater than a subcarrier number threshold.

45. The method of claim 32, wherein: One or more fields of each of a plurality of candidate DCIs differ based on a type of a radio network temporary identifier RNTI associated with the candidate DCI, and wherein the configuration message includes a DCI selected from a subset of the plurality of candidate DCIs, the plurality of candidate DCIs being configurable for any MCS associated with a modulation order of at least two.

46. ​​The method of claim 32, wherein: The configuration message includes an MCS field; If the one or more bits of the MCS field indicate that an MCS associated with a modulation order less than four is to be used, the plurality of bits of the configuration message indicate a first parameter associated with the uplink transmission; and If the one or more bits of the MCS field indicate an MCS associated with a modulation order of at least four, the plurality of bits indicate the first parameter and one or more second parameters associated with the uplink transmission.

47. The method of claim 32, wherein: The configuration message includes a DCI, and wherein the MCS is configured via the DCI if the number of transport blocks configured via the DCI is less than a threshold, the threshold corresponding to the number of transport blocks configured by the DCI that can also be configured for any MCS associated with a modulation order of two.

48. A method for wireless communication, comprising: generating a configuration message for narrowband internet of things (NB-IoT) communications, the configuration message indicating one or more parameters for uplink transmission using a modulation and coding scheme (MCS) associated with a modulation order of at least four; transmitting the configuration message; as well as The uplink transmission is received via a preconfigured uplink resource PUR in a first message of a random access procedure according to the one or more parameters.

49. The method of claim 48, further comprising: An indication of a power control parameter for said uplink transmission using an MCS associated with a modulation order of at least four is transmitted via downlink control information (DCI).

50. The method of claim 48, wherein: The one or more parameters are constrained to be selected from a subset of candidate configuration parameters that are configurable for any MCS associated with a modulation order of two or higher.

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