Physical downlink shared channel resources for reduced capability user equipment

Abstract

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may send a UE capability message to a base station, the UE capability message including an indication of a UE type associated with at least one of a reduced bandwidth, or a reduced number of antennas, or a combination thereof for the UE. The UE may receive a downlink grant for downlink resources for data transmission according to a resource allocation scheme based at least in part on the UE capability message, where the resource allocation scheme is associated with the UE type and a supported bandwidth portion of the UE. The UE may monitor the wireless channel based at least in part on the downlink grant. The UE may receive a data transmission based at least in part on the monitoring of the wireless channel.

Description

[0001] This application is a divisional application of patent application No. 202080065740.7, filed on September 25, 2020, entitled "Physical Downlink Shared Channel Resources for User Equipment with Reduced Capability".

[0002] Cross-references

[0003] This patent application claims priority to the following applications: U.S. Patent Application No. 17 / 031,869, filed September 24, 2020, entitled “PHYSICAL DOWNLINK SHARED CHANNEL RESOURCES FOR REDUCED CAPABILITY USEREQUIPMENT”, filed by LIU et al.; and U.S. Provisional Patent Application No. 62 / 907,499, filed September 27, 2019, entitled “PHYSICAL DOWNLINK SHARED CHANNEL RESOURCES FOR REDUCED CAPABILITY USEREQUIPMENT”, each of which is assigned to the assignee of this application. Technical Field

[0004] In summary, the following text relates to wireless communications, and more specifically, to Physical Downlink Shared Channel (PDSCH) resources for degraded User Equipment (UE). Background Technology

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, and broadcasting. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth-generation (4G) systems (e.g., Long Term Evolution (LTE) systems, improved LTE (LTE-A) systems, or LTE-A specialist systems) and fifth-generation (5G) systems (which may be referred to as New Radio (NR) systems). These systems can employ technologies such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), or Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-S-OFDM). Wireless multiple access communication systems may include multiple base stations or network access nodes, each supporting communication with multiple communication devices (which may also be referred to as UEs) simultaneously. Summary of the Invention

[0006] The described technology relates to methods, systems, devices, and apparatuses for improving Physical Downlink Shared Channel (PDSCH) resources for user equipment (UE) with reduced capabilities. In summary, the described technology provides various mechanisms to ensure appropriate scheduling for UE types with reduced antenna counts, reduced bandwidth, etc. For example, a UE type may be associated with limited bandwidth, low complexity, low transmit power levels, fewer receive antenna counts, extended battery life, etc. The UE may send or otherwise provide a UE capability message carrying or otherwise transmitting an indication of its UE type. The UE capability message can typically be sent to the base station; however, it should be understood that in some cases (e.g., when the UE is operating in idle mode), the UE capability message may be provided to a network entity. Based on the UE type indicated in the UE capability message, both the base station and the UE know that the UE type is associated with, for example, reduced bandwidth, reduced antenna counts, low complexity, or low transmit power levels. The base station (or the network entity when the UE is operating in idle mode) can select a resource allocation scheme for downlink licensing for the UE based on the UE capability message (e.g., based on the UE type). The base station can send downlink grants to the UE according to a resource allocation scheme, which identifies or otherwise indicates downlink resources for downlink transmission. The base station can then send data transmissions to the UE based on the downlink grants. Although several variations of the resource allocation scheme are described in detail below, some aspects may include interleaved / discontinuous resource blocks (RBs) such as distribution across subband subsets of the bandwidth portion (BWP), use of lower coding rates for wideband data transmission, use of intra-slot repetition for wideband short data channel transmission, and use of inter-BWP and inter-slot frequency hopping for narrowband long data transmission. Therefore, the aspects of the described techniques provide various enhancements to data transmission for UE types with reduced support capabilities (e.g., PDSCH transmissions).

[0007] A method for wireless communication at a UE is described. The method may include: sending a UE capability message to a base station, the UE capability message including an indication of a UE type, wherein the UE type is associated with at least one of reduced bandwidth, reduced number of antennas, or a combination thereof for the UE; receiving downlink grants for downlink resources for data transmission based on the UE capability message, according to a resource allocation scheme associated with the UE type and a supported bandwidth portion of the UE; monitoring a wireless channel based on the downlink grants; and receiving the data transmission based on the monitoring of the wireless channel.

[0008] An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to: send a UE capability message to a base station, the UE capability message including an indication of a UE type, wherein the UE type is associated with at least one of a reduced bandwidth, a reduced number of antennas, or a combination thereof for the UE; receive a downlink grant for downlink resources for data transmission based on the UE capability message, according to a resource allocation scheme associated with the UE type and a supported bandwidth portion of the UE; monitor a wireless channel based on the downlink grant; and receive the data transmission based on the monitoring of the wireless channel.

[0009] Another apparatus for wireless communication at a UE is described. The apparatus may include units for performing the following operations: sending a UE capability message to a base station, the UE capability message including an indication of a UE type, wherein the UE type is associated with at least one of reduced bandwidth, reduced number of antennas, or a combination thereof for the UE; receiving downlink grants for downlink resources for data transmission based on the UE capability message, according to a resource allocation scheme associated with the UE type and a supported bandwidth portion of the UE; monitoring a wireless channel based on the downlink grants; and receiving the data transmission based on the monitoring of the wireless channel.

[0010] A non-transitory computer-readable medium is described, storing code for wireless communication at a UE. The code may include instructions executable by a processor to: send a UE capability message to a base station, the UE capability message including an indication of a UE type, wherein the UE type is associated with at least one of reduced bandwidth, reduced number of antennas, or a combination thereof for the UE; based on the UE capability message, receive downlink grants for downlink resources for data transmission according to a resource allocation scheme, wherein the resource allocation scheme is associated with the UE type and a supported bandwidth portion of the UE; monitor a radio channel based on the downlink grants; and receive the data transmission based on the monitoring of the radio channel.

[0011] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving the data transmission may include operations, features, units, or instructions for performing the following: receiving the data transmission in interleaved and discontinuous resource blocks distributed on a subset of available subbands in the BWP support, the subset being based on the UE type.

[0012] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving the data transmission may include operations, features, units, or instructions for performing the following: receiving the data transmission on the BWP-supporting device and using a low coding rate, the low coding rate being based on the UE type.

[0013] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: identifying a scaling factor for data transmission using the low coding rate based on a scaling factor of the transmit block size, the scaling factor being based on the UE type.

[0014] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, a first demodulation reference signal (DMRS) transmission may be transmitted during a first time period of a first portion of a time slot, and a second DMRS transmission may be transmitted during a second time period of a second portion of the time slot, wherein the first time period of the first portion of the time slot is different from the second time period of the second portion of the time slot.

[0015] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving the data transmission may include operations, features, units, or instructions for performing: a first transmission of receiving the data transmission in a time slot and repeated transmissions of the data transmission.

[0016] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: identifying a DMRS configuration for receiving the first transmission and the repeated transmission in the time slot; and receiving the data transmission based on the DMRS configuration.

[0017] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the DMRS configuration may include operations, features, elements, or instructions for receiving a first DMRS transmission during a first portion of the time slot for the first transmission and receiving a second DMRS transmission during a second portion of the time slot for the repeated transmission.

[0018] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, the first DMRS transmission may be received during an initial time period of the first portion of the time slot, and the second DMRS transmission may be received during the initial time period of the second portion of the time slot.

[0019] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, the first DMRS transmission may be received during a first time period of the first portion of the time slot for the first transmission, and the second DMRS transmission may be received during a second time period of the second portion of the time slot for the repeated transmission, wherein the first time period of the first portion of the time slot is different from the second time period of the second portion of the time slot.

[0020] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, the first transmission and the repeated transmission occur during the same or different symbol configurations in the time slot.

[0021] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: identifying a first start symbol for the first transmission and a second start symbol for the repeated transmission based on a downlink aggregation factor for data repetition within a time slot.

[0022] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for transmitting a feedback signal for the data transmission during a subsequent time slot having a time slot for processing, based on the time slot in which the first transmission and the repeated transmission may be received.

[0023] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing: one or more additional repeated transmissions of the data transmission occurring in a second time slot in which the first transmission and the repeated transmission may be received; and transmitting a feedback signal during a subsequent time slot having a time gap for processing, based on the second time slot in which the one or more repeated transmissions may be received.

[0024] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving the data transmission may include operations, features, units, or instructions for performing the following: receiving a first portion of the data transmission in a first time slot and on a first subband supporting BWP; and receiving a second portion of the data transmission in a second time slot on a second subband supporting BWP, wherein the first subband may be a subband different from the second subband.

[0025] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for receiving a first portion and a second portion of the data transmission according to the same or different time domain configuration between the first and second time slots.

[0026] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, the first sub-band and the second sub-band may be in the same BWP or in different BWPs.

[0027] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing: determining that the first subband may be in a first BWP and that the second subband may be in a second BWP that may be different from the first BWP; and performing a retuning operation during a retuning gap between receiving the first portion and receiving the second portion.

[0028] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, the retuning gap may be the last portion of the first subband in a first BWP, or the first portion of the second subband in a second BWP, or a combination thereof.

[0029] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for receiving the first portion in the first time slot and the second portion in the second time slot based on a redundant version (RV) associated with the first and second portions of the data transmission.

[0030] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for receiving the data transmission based on a time slot index, a repeating index, or a combination thereof.

[0031] A method for wireless communication at a base station is described. The method may include: receiving a UE capability message from a UE, the UE capability message including an indication of a UE type, wherein the UE type is associated with at least one of reduced bandwidth, reduced number of antennas, or a combination thereof for the UE; selecting a resource allocation scheme for downlink grants for the UE based on the UE capability message and a portion of the UE's supported bandwidth; sending downlink grants to the UE for downlink resources for data transmission according to the resource allocation scheme; and sending the data transmission to the UE based on the downlink grants.

[0032] An apparatus for wireless communication at a base station is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to perform the following operations: receiving a UE capability message from a UE, the UE capability message including an indication of a UE type, wherein the UE type is associated with at least one of reduced bandwidth, reduced number of antennas, or a combination thereof for the UE; selecting a resource allocation scheme for downlink grants for the UE based on the UE capability message and a portion of the UE's supported bandwidth; sending downlink grants to the UE for downlink resources for data transmission according to the resource allocation scheme; and sending the data transmission to the UE based on the downlink grants.

[0033] Another apparatus for wireless communication at a base station is described. The apparatus may include units for performing the following operations: receiving a UE capability message from a UE, the UE capability message including an indication of a UE type, wherein the UE type is associated with at least one of reduced bandwidth, reduced number of antennas, or a combination thereof for the UE; selecting a resource allocation scheme for downlink grants for the UE based on the UE capability message and a portion of the UE's supported bandwidth; sending downlink grants to the UE for downlink resources for data transmission according to the resource allocation scheme; and sending the data transmission to the UE based on the downlink grants.

[0034] A non-transitory computer-readable medium is described, storing code for wireless communication at a base station. The code may include instructions executable by a processor to: receive a UE capability message from a UE, the UE capability message including an indication of a UE type, wherein the UE type is associated with at least one of reduced bandwidth, reduced number of antennas, or a combination thereof for the UE; select a resource allocation scheme for downlink grants for the UE based on the UE capability message and a portion of the UE's supported bandwidth; send downlink grants to the UE for downlink resources for data transmission according to the resource allocation scheme; and send the data transmission to the UE based on the downlink grants.

[0035] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, transmitting the data transmission may include operations, features, units, or instructions for performing the following: transmitting the data transmission in interleaved and discontinuous resource blocks distributed over a subset of available subbands in the BWP support, the subset being based on the UE type.

[0036] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, transmitting the data transmission may include operations, features, units, or instructions for performing the following: transmitting the data transmission on the BWP-supporting device and using a low coding rate, the low coding rate being based on the UE type.

[0037] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: identifying a scaling factor to be used for the data transmission using the low coding rate based on a scaling factor of the transmit block size, the scaling factor being based on the UE type.

[0038] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, transmitting the data transmission may include operations, features, units, or instructions for performing: a first transmission of the data transmission in a time slot and repeated transmissions of the data transmission.

[0039] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: identifying a DMRS configuration for transmitting the first transmission and the repeated transmission in the time slot; and transmitting the data transmission based on the DMRS configuration.

[0040] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, the DMRS configuration may include operations, features, units or instructions for transmitting a first DMRS transmission during a first portion of the time slot for the first transmission and transmitting a second DMRS transmission during a second portion of the time slot for the repeated transmission.

[0041] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, the first DMRS transmission may be sent during an initial time period of the first portion of the time slot for the first transmission, and the second DMRS transmission may be sent during the initial time period of the second portion of the time slot for the repeated transmission.

[0042] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, the first transmission and the repeated transmission occur during the same or different symbol configurations in the time slot.

[0043] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: identifying a first start symbol for the first transmission and a second start symbol for the repeated transmission based on a downlink aggregation factor for data repetition within a time slot.

[0044] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for receiving a feedback signal for the data transmission during a subsequent time slot having a time slot for processing, based on the time slot in which the first transmission and the repeated transmission may be transmitted.

[0045] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing: one or more additional repeated transmissions of the data transmission occurring in a second time slot after the time slot in which the first transmission and the repeated transmission may be transmitted; and receiving a feedback signal during a subsequent time slot having a time gap for processing, based on the second time slot in which the one or more repeated transmissions may be transmitted.

[0046] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, transmitting the data transmission may include operations, features, units, or instructions for performing the following: transmitting a first portion of the data transmission in a first time slot and on a first subband supporting BWP; and transmitting a second portion of the data transmission in a second time slot on a second subband supporting BWP, wherein the first subband may be a subband different from the second subband.

[0047] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for transmitting a first portion of the data transmission and a second portion of the data transmission according to the same or different time domain configuration between the first time slot and the second time slot.

[0048] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, the first sub-band and the second sub-band may be in the same BWP or in different BWPs.

[0049] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for performing the following: determining that the first subband may be in a first BWP and that the second subband may be in a second BWP that may be different from the first BWP; and configuring a retuning gap between transmitting the first portion and receiving the second portion.

[0050] In some examples of the methods, apparatuses and non-transitory computer-readable media described herein, the retuning gap includes the last portion of the first subband in a first BWP, or the first portion of the second subband in a second BWP, or a combination thereof.

[0051] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for transmitting the first portion of the first time slot and the second portion of the second time slot based on the RV associated with the first and second portions of the data transmission.

[0052] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, units, or instructions for transmitting the data based on a time-slot index, a repeating index, or a combination thereof. Attached Figure Description

[0053] Figure 1 An example of a system for wireless communication that supports physical downlink shared channel (PDSCH) resources for a degraded user equipment (UE) is shown, according to various aspects of this disclosure.

[0054] Figure 2 An example set of time slot configurations for PDSCH resources supporting a UE with reduced capabilities is shown, according to various aspects of this disclosure.

[0055] Figure 3 An example set of time slot configurations for PDSCH resources supporting a UE with reduced capabilities is shown, according to various aspects of this disclosure.

[0056] Figure 4 An example set of time slot configurations for PDSCH resources supporting a UE with reduced capabilities is shown, according to various aspects of this disclosure.

[0057] Figure 5 An example set of time slot configurations for PDSCH resources supporting a UE with reduced capabilities is shown, according to various aspects of this disclosure.

[0058] Figure 6An example set of time slot configurations for PDSCH resources supporting a UE with reduced capabilities is shown, according to various aspects of this disclosure.

[0059] Figure 7 An example set of time slot configurations for PDSCH resources supporting a UE with reduced capabilities is shown, according to various aspects of this disclosure.

[0060] Figure 8 An example set of time slot configurations for PDSCH resources supporting a UE with reduced capabilities is shown, according to various aspects of this disclosure.

[0061] Figure 9 An example set of time slot configurations for PDSCH resources supporting a UE with reduced capabilities is shown, according to various aspects of this disclosure.

[0062] Figure 10 An example set of time slot configurations for PDSCH resources supporting a UE with reduced capabilities is shown, according to various aspects of this disclosure.

[0063] Figure 11 and 12 A block diagram of an apparatus supporting PDSCH resources for a UE with reduced capabilities, according to various aspects of this disclosure, is shown.

[0064] Figure 13 A block diagram of a communication manager supporting PDSCH resources for a UE with reduced capabilities, according to various aspects of this disclosure, is shown.

[0065] Figure 14 A diagram of a system including devices supporting PDSCH resources for a UE with reduced capabilities, according to various aspects of this disclosure, is shown.

[0066] Figure 15 and 16 A block diagram of an apparatus supporting PDSCH resources for a UE with reduced capabilities, according to various aspects of this disclosure, is shown.

[0067] Figure 17 A block diagram of a communication manager supporting PDSCH resources for a UE with reduced capabilities, according to various aspects of this disclosure, is shown.

[0068] Figure 18 A diagram of a system including devices supporting PDSCH resources for a UE with reduced capabilities, according to various aspects of this disclosure, is shown.

[0069] Figures 19 to 22 A flowchart illustrating a method for supporting PDSCH resources for a UE with reduced capabilities, based on various aspects of this disclosure, is shown. Detailed Implementation

[0070] Some wireless communication systems use frequency and / or time-domain diversity to support improved system performance and throughput. For example, such wireless communication systems may utilize various techniques, individually or in combination, to enhance system capacity and performance. These techniques include, but are not limited to, discontinuous resource blocks (RBs) within a wide bandwidth portion (BWP), distributed resource allocation within a wide BWP, and multi-slot aggregation for physical downlink shared channels (PDSCH). These wireless communication systems typically do not support frequency hopping. However, technological advancements have also resulted in certain user equipment (UE) types being unable to utilize some or all of these advanced technologies. For example, some UE types are associated with limited or reduced bandwidth, low complexity levels, low maximum transmit power levels, reduced antenna counts, or extended battery life. Such UE types can include wearable devices, Internet of Things (IoT) devices, machine-type communication (MTC) devices, and so on.

[0071] The various aspects of this disclosure are first described within the context of wireless communication systems. In summary, the described techniques provide various mechanisms to ensure appropriate scheduling for UE types with reduced antenna counts, reduced bandwidth, etc. For example, a UE type may be associated with, for instance, limited bandwidth, low complexity, low transmit power levels, fewer receive antennas, extended battery life, etc. The UE may send or otherwise provide a UE capability message carrying or otherwise transmitting an indication of its UE type. UE capability messages are typically sent to a base station; however, it should be understood that in some cases (e.g., when the UE is operating in idle mode), UE capability messages may be provided to network entities.

[0072] UE capability messages can be Radio Resource Control (RRC) layer messages sent by the UE to a base station or other network entity, for example, during the initial registration process. UE capability messages can use a set of defined or standardized information elements or other fields to detail the UE's capabilities or attributes and the features the UE supports.

[0073] Based on the UE type indicated in the UE capability message, both the base station and the UE know that the UE type is associated with, for example, reduced bandwidth, reduced number of antennas, low complexity, or low transmit power level. The base station (or the network entity when the UE is operating in idle mode) can select a resource allocation scheme for downlink grants for the UE based on the UE capability message (e.g., based on the UE type). The base station can send downlink grants to the UE based on the resource allocation scheme, which identifies or otherwise indicates downlink resources for downlink transmission. The base station can then send data transmissions to the UE based on the downlink grants. Although several variations of the resource allocation scheme are described below, some aspects may include interleaved / discontinuous RBs such as distribution on subband subsets of BWPs, use of low coding rates for wideband data channel transmissions, use of intra-slot repetition for wideband short data channel transmissions, and use of inter-BWP and inter-slot frequency hopping for narrowband long data channel transmissions. Therefore, the aspects of the described techniques provide various enhancements to data transmission (e.g., PDSCH) supporting UE types.

[0074] Various aspects of this disclosure are further illustrated and described with reference to apparatus diagrams, system diagrams, and flowcharts relating to PDSCH resources for UEs with reduced capabilities.

[0075] Figure 1 An example of a wireless communication system 100 supporting PDSCH resources for a UE with reduced capabilities, according to various aspects of this disclosure, is shown. The wireless communication system 100 includes a base station 105, a UE 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an improved LTE (LTE-A) network, an LTE-A specialist network, or a New Radio (NR) network. In some cases, the wireless communication system 100 may support enhanced broadband communication, ultra-reliable (e.g., mission-critical) communication, low-latency communication, or communication with low-cost and low-complexity devices.

[0076] Base station 105 can wirelessly communicate with UE 115 via one or more base station antennas. Base station 105 described herein may include, or may be referred to by those skilled in the art as, a base transceiver, wireless base station, access point, wireless transceiver, Node B, evolved Node B (eNB), next-generation Node B, or gigabit Node B (any of which may be referred to as gNodeB or gNB), home Node B, home evolved Node B, or some other suitable term. Wireless communication system 100 may include different types of base stations 105 (e.g., macro cell base stations or small cell base stations). UE 115 described herein is capable of communicating with various types of base stations 105 and network devices (including macro eNBs, small cell eNBs, gNBs, relay base stations, etc.).

[0077] Each base station 105 may be associated with a specific geographic coverage area 110 in which communication with each UE 115 is supported. Each base station 105 may provide communication coverage to the corresponding geographic coverage area 110 via a communication link 125, and the communication link 125 between the base station 105 and the UE 115 may utilize one or more carriers. The communication link 125 shown in the wireless communication system 100 may include: an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. The downlink transmission may also be referred to as a forward link transmission, and the uplink transmission may also be referred to as a reverse link transmission.

[0078] The geographic coverage area 110 for base station 105 can be divided into sectors, which constitute part of the geographic coverage area 110, and each sector can be associated with a cell. For example, each base station 105 can provide communication coverage for macro cells, small cells, hotspots, or other types of cells, or various combinations thereof. In some examples, base station 105 can be mobile, and therefore, provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies can overlap, and overlapping geographic coverage areas 110 associated with different technologies can be supported by the same base station 105 or different base stations 105. The wireless communication system 100 can include, for example, heterogeneous LTE / LTE-A / LTE-A professional or NR networks, wherein different types of base stations 105 provide coverage for individual geographic coverage areas 110.

[0079] The term "cell" refers to a logical communication entity used for communication with base station 105 (e.g., on a carrier) and may be associated with an identifier (e.g., Physical Cell Identifier (PCID), Virtual Cell Identifier (VCID)) used to distinguish neighboring cells operating via the same or different carriers. In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, Narrowband Internet of Things (NB-IoT), Enhanced Mobile Broadband (eMBB), or other protocol types) that can provide access for different types of devices. In some cases, the term "cell" may refer to a portion (e.g., a sector) of the geographical coverage area 110 on which the logical entity operates.

[0080] UE 115 may be distributed throughout the wireless communication system 100, and each UE 115 may be stationary or mobile. UE 115 may also be referred to as a mobile device, wireless device, remote device, handheld device, or user equipment, or some other suitable term, wherein "device" may also be referred to as a cell, station, terminal, or client. UE 115 may also be a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, UE 115 may also refer to a wireless local loop (WLL) station, IoT device, Internet of Things (IoE) device, or MTC device, which may be implemented in various items such as appliances, vehicles, instruments, etc.

[0081] Some UE 115s (e.g., MTC or IoT devices) can be low-cost or low-complexity devices and can provide automated machine-to-machine communication (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC can refer to data communication technologies that allow devices to communicate with each other or with base station 105 without human intervention. In some examples, M2M communication or MTC can include communication from devices that have integrated sensors or meters to measure or capture information and relay that information to a central server or application that can utilize that information or present it to humans interacting with that program or application. Some UE 115s can be designed to collect information or enable automated machine behavior. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, climate and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based billing.

[0082] Some UEs 115 can be configured to operate in a power-saving mode, such as half-duplex communication (e.g., a mode that supports unidirectional communication via either transmission or reception, rather than simultaneous transmission and reception). In some examples, half-duplex communication may be performed at a reduced peak rate. Other power-saving techniques for UE 115 include entering a power-saving "deep sleep" mode when not engaged in active communication or operating on limited bandwidth (e.g., according to narrowband communication). In some cases, UE 115 may be designed to support critical functions (e.g., mission-critical functions), and the wireless communication system 100 may be configured to provide ultra-reliable communication for these functions.

[0083] In some cases, UE 115 can also communicate directly with other UE 115 (e.g., using peer-to-peer (P2P) or device-to-device (D2D) protocols). One or more UE 115s in a group utilizing D2D communication can be within the geographic coverage area 110 of base station 105. Other UE 115s in such a group may be outside the geographic coverage area 110 of base station 105, or otherwise unable to receive transmissions from base station 105. In some cases, multiple groups of UE 115 communicating via D2D communication can utilize a one-to-many (1:M) system, where each UE 115 transmits to every other UE 115 in the group. In some cases, base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between UE 115s without involving base station 105.

[0084] Base station 105 can communicate with core network 130 and with each other. For example, base station 105 can interface with core network 130 via backhaul link 132 (e.g., via S1, N2, N3 or other interfaces). Base station 105 can communicate with each other directly (e.g., directly between base stations 105) or indirectly (e.g., via core network 130) on backhaul link 134 (e.g., via X2, Xn or other interfaces).

[0085] Core network 130 can provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. Core network 130 may be an evolved packet core (EPC), which may include at least one Mobility Management Entity (MME), at least one Serving Gateway (S-GW), and at least one Packet Data Network (PDN) Gateway (P-GW). The MME can manage non-access stratum (e.g., control plane) functions, such as mobility, authentication, and bearer management for UE 115 served by base station 105 associated with the EPC. User IP packets can be transmitted via the S-GW, which itself may be connected to the P-GW. The P-GW can provide IP address allocation and other functions. The P-GW may be connected to network operator IP services. Operator IP services may include access to the Internet, intranets, IP Multimedia Subsystem (IMS), or packet-switched (PS) streaming services.

[0086] At least some of the network devices (e.g., base station 105) may include sub-components such as access network entities, which may be examples of access node controllers (ANCs). Each access network entity may communicate with UE 115 through multiple other access network transport entities (which may be referred to as radio headends, smart radio headends, or transmit / receive points (TRPs)). In some configurations, the various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio headends and access network controllers) or incorporated into a single network device (e.g., base station 105).

[0087] Wireless communication system 100 can operate using one or more frequency bands (typically in the range of 300 MHz to 300 GHz). The region from 300 MHz to 3 GHz is often referred to as the Ultra High Frequency (UHF) region or decimeter band because the wavelength range extends from approximately one decimeter to one meter in length. UHF waves may be blocked or redirected by buildings and environmental features. However, the waves can be sufficiently permeable to penetrate structures for use in macrocells to provide service to UE 115 located indoors. Compared to the transmission of smaller frequencies and longer waves in the lower 300 MHz portion of the spectrum in the High Frequency (HF) or Very High Frequency (VHF) regions, UHF wave transmission can be associated with smaller antennas and shorter distances (e.g., less than 100 km).

[0088] The wireless communication system 100 can also operate in the ultra-high frequency (SHF) region using a frequency band from 3 GHz to 30 GHz (also known as the centimeter band). The SHF region includes frequency bands such as the 5 GHz industrial, scientific, and medical (ISM) band, which can be used opportunistically by devices capable of tolerating interference from other users.

[0089] The wireless communication system 100 can also operate in the extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) (also referred to as the millimeter band). In some examples, the wireless communication system 100 can support millimeter-wave (mmW) communication between the UE 115 and the base station 105, and the EHF antennas of the corresponding device can be even smaller and more closely spaced compared to UHF antennas. In some cases, this can facilitate the use of antenna arrays within the UE 115. However, compared to SHF or UHF transmissions, EHF transmissions may suffer even greater atmospheric attenuation and shorter distances. The techniques disclosed herein can be employed across transmissions using one or more different frequency regions, and the designated use of frequency bands across these frequency regions can vary depending on the country or regulatory authority.

[0090] In some cases, wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, wireless communication system 100 may employ Licensed Assisted Access (LAA), LTE Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed frequency band (e.g., a 5 GHz ISM band). When operating in an unlicensed radio frequency spectrum band, wireless devices (e.g., base station 105 and UE 115) may employ a Listen-Before-Speak (LBT) procedure before transmitting data to ensure that the frequency channel is idle. In some cases, operation in an unlicensed frequency band may be based on carrier aggregation configurations that combine component carriers operating in a licensed frequency band (e.g., LAA). Operation in the unlicensed spectrum may include downlink transmission, uplink transmission, peer-to-peer transmission, or a combination of these. Duplexing in the unlicensed spectrum may be based on Frequency Division Duplex (FDD), Time Division Duplex (TDD), or a combination of both.

[0091] In some examples, base station 105 or UE 115 may be equipped with multiple antennas, which can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. For example, wireless communication system 100 may use a transmission scheme between a transmitting device (e.g., base station 105) and a receiving device (e.g., UE 115), wherein the transmitting device is equipped with multiple antennas, and the receiving device is equipped with one or more antennas. MIMO communication may employ multipath signal propagation to improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers (this may be referred to as spatial multiplexing). For example, the transmitting device may transmit multiple signals via different antennas or different combinations of antennas. Similarly, the receiving device may receive multiple signals via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams. Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO technology includes single-user MIMO (SU-MIMO) (where multiple spatial layers are sent to the same receiving device) and multi-user MIMO (MU-MIMO) (where multiple spatial layers are sent to multiple devices).

[0092] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting or receiving device (e.g., base station 105 or UE 115) to form or guide an antenna beam (e.g., a transmit beam or a receive beam) along a spatial path between the transmitting and receiving devices. Beamforming can be achieved by combining signals transmitted via antenna elements of an antenna array such that signals propagating relative to a specific orientation of the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to the signals transmitted via the antenna elements can include applying certain amplitude and phase offsets to the signals carried by each antenna element in the antenna elements associated with the transmitting or receiving device. The adjustments associated with each antenna element can be defined by a set of beamforming weights associated with a specific orientation (e.g., relative to the antenna array of the transmitting or receiving device, or relative to some other orientation).

[0093] In one example, base station 105 may use multiple antennas or antenna arrays to perform beamforming operations for directional communication with UE 115. For example, base station 105 may transmit signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) multiple times in different directions, said signals may include signals transmitted according to different sets of beamforming weights associated with different transmission directions. Transmissions in different beam directions can be used (e.g., by base station 105 or receiving device (e.g., UE 115)) to identify the beam direction for subsequent transmissions and / or receptions performed by base station 105.

[0094] Base station 105 may transmit signals (e.g., data signals associated with a specific receiving device) in a single beam direction (e.g., the direction associated with a receiving device (e.g., UE 115)). In some examples, the beam direction associated with transmission along a single beam direction may be determined at least in part based on signals transmitted in different beam directions. For example, UE 115 may receive one or more signals transmitted by base station 105 in different directions, and UE 115 may report to base station 105 an indication of the signal it received that has the highest signal quality or otherwise acceptable signal quality. While these techniques are described with reference to signals transmitted by base station 105 in one or more directions, UE 115 may employ similar techniques to transmit signals multiple times in different directions (e.g., to identify beam directions for subsequent transmissions or receptions by UE 115) or to transmit signals in a single direction (e.g., to transmit data to a receiving device).

[0095] When receiving various signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) from base station 105, a receiving device (e.g., UE 115, which may be an example of an mmW receiving device) can attempt multiple receive beams. For example, the receiving device can attempt multiple receive directions by receiving via different antenna subarrays, by processing the received signals according to different antenna subarrays, by receiving according to different sets of receive beamforming weights applied to the signals received at multiple antenna elements of the antenna array, or by processing the received signals according to different sets of receive beamforming weights applied to the signals received at multiple antenna elements of the antenna array (any of the above operations can be referred to as “listening” according to different receive beams or receive directions). In some examples, the receiving device can use a single receive beam to receive along a single beam direction (e.g., when receiving data signals). A single receiving beam can be aligned on a beam direction determined at least in part based on listening to different receiving beam directions (e.g., a beam direction determined at least in part based on listening to multiple beam directions to have the highest signal strength, highest signal-to-noise ratio, or otherwise acceptable signal quality).

[0096] In some cases, the antennas of base station 105 or UE 115 may be located within one or more antenna arrays that can support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some cases, the antennas or antenna arrays associated with base station 105 may be located in different geographical locations. Base station 105 may have antenna arrays with multiple rows and columns of antenna ports that base station 105 can use to support beamforming for communication with UE 115. Similarly, UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations.

[0097] In some cases, the wireless communication system 100 may be a packet-based network operating according to a layered protocol stack. In the user plane, communication at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. The Radio Link Control (RLC) layer may perform packet segmentation and reassembly for communication on logical channels. The Media Access Control (MAC) layer may perform priority handling and multiplexing of logical channels to transport channels. The MAC layer may also use Hybrid Automatic Repeat Request (HARQ) to provide retransmissions at the MAC layer to improve link efficiency. In the control plane, the RRC protocol layer may provide the establishment, configuration, and maintenance of RRC connections (which support radio bearers for user plane data) between the UE 115 and the base station 105 or core network 130. At the physical layer, transport channels may be mapped to physical channels.

[0098] In some cases, UE 115 and base station 105 can support data retransmission to increase the likelihood of successful data reception. HARQ feedback is a technique to increase the likelihood of correct data reception on communication link 125. HARQ may include a combination of error detection (e.g., using Cyclic Redundancy Check (CRC)), forward error correction (FEC), and retransmission (e.g., Automatic Repeat Request (ARQ)). HARQ can improve throughput at the MAC layer under poor radio conditions (e.g., signal and noise conditions). In some cases, the radio device can support same-slot HARQ feedback, where the device can provide HARQ feedback for data received in a previous symbol within a specific time slot. In other cases, the device can provide HARQ feedback in subsequent time slots or according to some other time interval.

[0099] It can be based on the basic unit of time (which can, for example, refer to T). s The time interval in LTE or NR is represented as a multiple of a sampling period of 1 / 30,720,000 seconds. The time interval of communication resources can be organized according to radio frames, each with a duration of 10 milliseconds (ms), where the frame period can be expressed as T. f =307,200T sRadio frames can be identified by System Frame Numbers (SFNs) ranging from 0 to 1023. Each frame may include 10 subframes numbered from 0 to 9, and each subframe may have a duration of 1 ms. Subframes may also be divided into two time slots, each with a duration of 0.5 ms, and each time slot may contain 6 or 7 modulation symbol periods (e.g., depending on the length of the cyclic prefix added before each symbol period). Excluding the cyclic prefix, each symbol period may contain 2048 sampling periods. In some cases, a subframe may be the minimum scheduling unit of the wireless communication system 100 and may be referred to as a Transmission Time Interval (TTI). In other cases, the minimum scheduling unit of the wireless communication system 100 may be shorter than a subframe or may be dynamically selected (e.g., in a burst of shortened TTIs (sTTIs) or in selected component carriers using sTTIs).

[0100] In some wireless communication systems, time slots can be further divided into multiple micro-time slots containing one or more symbols. In some instances, the symbol or micro-time slot of a micro-time slot can be the smallest scheduling unit. The duration of each symbol can vary depending on, for example, the subcarrier spacing or the frequency band of operation. Furthermore, some wireless communication systems can implement time slot aggregation, where multiple time slots or micro-time slots are aggregated together and used for communication between UE 115 and base station 105.

[0101] The term "carrier" refers to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communication on communication link 125. For example, a carrier of communication link 125 may include a portion of the radio frequency spectrum band that operates according to physical layer channels for a given radio access technology. Each physical layer channel may carry user data, control information, or other signaling. Carriers may be associated with predefined frequency channels (e.g., Evolved Universal Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute Radio Channel Number (EARFCN)) and may be positioned according to a channel grid for discovery by UE 115. Carriers may be downlink or uplink (e.g., in FDD mode), or may be configured to carry both downlink and uplink communication (e.g., in TDD mode). In some examples, the signal waveform transmitted on a carrier may consist of multiple subcarriers (e.g., using multicarrier modulation (MCM) techniques such as Orthogonal Frequency Division Multiplexing (OFDM) or Discrete Fourier Transform Extended OFDM (DFT-S-OFDM).

[0102] The carrier organization structure can vary depending on the radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). For example, communication on a carrier can be organized according to a TTI or time slot, each of which can include user data and control information or signaling to support the decoding of the user data. A carrier can also include dedicated acquisition signaling (e.g., synchronization signals or system information) and control signaling to coordinate operations on the carrier. In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling to coordinate operations on other carriers.

[0103] Physical channels can be multiplexed on a carrier using various techniques. For example, time division multiplexing (TDM), frequency division multiplexing (FDM), or hybrid TDM-FDM techniques can be used to multiplex physical control channels and physical data channels on a downlink carrier. In some examples, control information transmitted in the physical control channel can be distributed in a concatenated manner between different control regions (e.g., between a common control region or common search space and one or more UE-specific control regions or UE-specific search spaces).

[0104] A carrier can be associated with a specific bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth can be referred to as the carrier or the “system bandwidth” of the wireless communication system 100. For example, the carrier bandwidth can be one of several predetermined bandwidths for a carrier specific to a wireless access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz). In some examples, each served UE 115 can be configured to operate on a portion or all of the carrier bandwidth. In other examples, some UEs 115 can be configured to operate using a narrowband protocol type associated with a predefined portion or range within the carrier (e.g., a set of subcarriers or RBs) (e.g., “in-band” deployment of a narrowband protocol type).

[0105] In systems employing MCM technology, a resource element can consist of a symbol period (e.g., the duration of a modulation symbol) and a subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element can depend on the modulation scheme (e.g., the order of the modulation scheme). Therefore, the more resource elements UE 115 receives and the higher the order of the modulation scheme, the higher the data rate can be for UE 115. In MIMO systems, wireless communication resources can refer to a combination of radio frequency spectrum resources, temporal resources, and spatial resources (e.g., spatial layers), and the use of multiple spatial layers can further increase the data rate used for communication with UE 115.

[0106] The devices of the wireless communication system 100 (e.g., base station 105 or UE 115) may have a hardware configuration that supports communication on a specific carrier bandwidth, or may be configurable to support communication on one carrier bandwidth in a set of carrier bandwidths. In some examples, the wireless communication system 100 may include base station 105 and / or UE 115 that support simultaneous communication via carriers associated with more than one different carrier bandwidth.

[0107] The wireless communication system 100 can support communication with the UE 115 on multiple cells or carriers (a feature that may be referred to as carrier aggregation or multi-carrier operation). Depending on the carrier aggregation configuration, the UE 115 can be configured with multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation can be used in conjunction with both FDD component carriers and TDD component carriers.

[0108] In some cases, the wireless communication system 100 may utilize enhanced component carriers (eCC). eCC can be characterized by one or more features including: a wider carrier or frequency channel bandwidth, a shorter symbol duration, a shorter TTI duration, or a modified control channel configuration. In some cases, eCC may be associated with carrier aggregation or dual connectivity configurations (e.g., when multiple serving cells have suboptimal or non-ideal backhaul links). eCC can also be configured for use in unlicensed or shared spectrum (e.g., where more than one operator is permitted to use the spectrum). eCC characterized by a wide carrier bandwidth may include one or more segments that can be used by a UE 115 that cannot monitor the entire carrier bandwidth or is otherwise configured to use a limited carrier bandwidth (e.g., to save power).

[0109] In some cases, eCC can utilize a different symbol duration than other component carriers, which may include using a reduced symbol duration compared to other component carriers. A shorter symbol duration can be associated with increased spacing between adjacent subcarriers. Devices utilizing eCC (e.g., UE 115 or base station 105) can transmit wideband signals (e.g., based on a frequency channel or carrier bandwidth of 20, 40, 60, or 80 MHz) with a reduced symbol duration (e.g., 16.67 microseconds). The TTI in eCC can consist of one or more symbol periods. In some cases, the TTI duration (i.e., the number of symbol periods in the TTI) can be variable.

[0110] In addition, the wireless communication system 100 can be an NR system, which can utilize any combination of licensed, shared, and unlicensed spectrum bands. The flexibility in eCC symbol duration and subcarrier spacing allows for the use of eCC across multiple spectrums. In some examples, NR shared spectrum can improve spectrum utilization and efficiency, especially through dynamic vertical (e.g., across the frequency domain) and horizontal (e.g., across the time domain) sharing of resources.

[0111] UE 115 may send a UE capability message to base station 105. The UE capability message includes an indication of the UE type, wherein the UE type is associated with at least one of UE 115's reduced bandwidth, reduced number of antennas, or a combination thereof. UE 115 may receive downlink grants for downlink resources for data transmission, at least in part based on the UE capability message, according to a resource allocation scheme, wherein the resource allocation scheme is associated with the UE type and a portion of UE 115's supported bandwidth. UE 115 may monitor the radio channel, at least in part based on the downlink grants. UE 115 may receive data transmission, at least in part based on the monitoring of the radio channel.

[0112] Base station 105 can receive a UE capability message from UE 115. The UE capability message includes an indication of the UE type, wherein the UE type is associated with at least one of the following: reduced bandwidth, reduced number of antennas, or a combination thereof for UE 115. Base station 105 can select a resource allocation scheme for downlink grants for UE 115 based at least in part on the UE capability message and a portion of the UE's supported bandwidth. Base station 105 can send downlink grants to the UE for downlink resources used for data transmission according to the resource allocation scheme. Base station 105 can send data transmissions to UE 115 based at least in part on the downlink grants.

[0113] Although these techniques are described as being performed by base station 105, it should be understood that references to base station 105 performing features in the context of the described techniques can actually be implemented by base station 105 and / or network entities (such as MME). In one example, this could include: base station 105 (e.g., gNB) performing the described techniques when UE 115 is operating in RRC connected mode; and network entities (e.g., MME) performing the described techniques when UE 115 is operating in RRC idle or inactive mode. In another example, UE 115 may report this capability to a network entity (e.g., via MME through NAS signaling). Base station 105 performs the UE's features based on relevant information obtained from the network entity.

[0114] Figure 2An example set 200 of time slot configurations supporting PDSCH resources for UEs with reduced capabilities, according to various aspects of this disclosure, is illustrated. In some examples, the example time slot configuration set 200 may implement aspects of the wireless communication system 100. The aspects of the example time slot configuration set 200 may be implemented by the UE, a base station, and / or a network entity (e.g., an MME) (which may be examples of the corresponding devices described herein). Specifically, when the UE is operating in RRC connected mode, the aspects of the example time slot configuration set 200 may be implemented by the base station, and / or when the UE is operating in RRC inactive or RRC idle mode, the aspects of the example time slot configuration set 200 may be implemented in a network entity (e.g., an MME). More broadly, the example time slot configuration set 200 illustrates four examples of time slot configurations for supporting PDSCH enhancements for UE types with reduced capabilities (or associated with reduced capabilities).

[0115] Some wireless communication systems can utilize various diversity techniques to improve system throughput and performance. Diversity techniques can be implemented in the frequency, spatial, and / or time domains. In the frequency domain, this can include configuring discontinuous RBs within a wide BWP, using distributed resource allocation within the wide BWP to achieve frequency diversity over a wide bandwidth. In the time domain, this can include using multi-slot aggregation for PDSCH. Multi-slot repetition can be used, for example, on the same symbol allocation over aggregation factors (e.g., pdsch-AggregationFactor{2,4, or 8}) distributed across consecutive time slots. However, such techniques can be problematic for certain capability-degraded UEs (e.g., certain UE types). For example, some techniques may require wider bandwidth or longer transmission times, which is detrimental to power savings for some UE types. While some UE types support such techniques, others may not support them (or at least may not fully support them).

[0116] For example, some UE types may be associated with reduced or limited bandwidth (e.g., 5MHz / 10MHz / 20MHz, which may be greater than the SSB bandwidth), low complexity (e.g., reduced processing power / requirements, less memory, or fewer transmit / receive chains), lower maximum transmit power levels (e.g., 20dBm or 14dBm), reduced number of antennas (e.g., one or two receive antennas), increased power savings / longer battery life (e.g., in years), reduced or no mobility, transmitting small amounts of data, etc. However, such reduced-capability UEs (e.g., UEs with reduced bandwidth or reduced number of antennas) must still coexist with eMBB, URLLC, or LTE-NB IoT / MTC devices. Therefore, references to UE types in this document generally refer to these reduced-capability UEs.

[0117] Therefore, the described aspects of the technology provide various mechanisms to enhance communication for such UE types (e.g., degraded UEs). For example, the UE may send or otherwise provide a UE capability message to a base station (and / or via the base station to a network entity) that carries or otherwise transmits an indication of the UE type. As discussed, a UE type may be associated with, for example, a UE with reduced bandwidth, a reduced number of antennas, a low transmit power level, little or no mobility, enhanced power savings / extended battery life, or degraded ability to transmit small data. The UE capability message may be provided during initial connection (e.g., using one or more RRC signals, MAC control elements (CE), etc.) or during registration (e.g., using NAS signals to a network entity) or afterward.

[0118] Base stations (or network entities) can typically select a resource allocation scheme for a UE, which can be used to send downlink grants and / or data transmissions to the UE based on the UE type. Example slot configuration set 200 illustrates four non-limiting examples of slot configurations that can be components of a resource allocation scheme selected for the UE according to various aspects of the described technology.

[0119] In the first example, the resource allocation scheme may correspond to slot configuration 205. Slot configuration 205 illustrates an example of interleaved / discontinuous RBs distributed across a subset of available subbands in a BWP in distributed resource allocation. Slot configuration 205 may include PDCCH 225 (e.g., downlink grants for downlink resources) distributed throughout the BWP. PDCCH 225 may carry or otherwise transmit indications of downlink resources according to the resource allocation scheme (e.g., according to slot configuration 205). PDCCH 225 may span the first symbol of a slot. During the first symbol following PDCCH 225, the base station may transmit data by transmitting DMRS 235 (followed by PDSCH 230). Generally, data transmission may correspond to PDSCH 230, and the channel estimation for data transmission is based on DMRS 235. However, data transmission may be transmitted using only a subset of available subbands in the entire BWP (e.g., reduced bandwidth supported by the UE type).

[0120] In the second example, the resource allocation scheme may correspond to slot configuration 210. Slot configuration 210 illustrates an example of data transmission distributed across a BWP and using a low coding rate, where the low coding rate is based on the UE type. Slot configuration 210 may include PDCCH 225 (e.g., downlink grants for downlink resources) distributed across the entire BWP. PDCCH 225 may carry or otherwise transmit indications of downlink resources according to the resource allocation scheme (e.g., according to slot configuration 210). PDCCH 225 may span the first symbol of a slot. During the first symbol following PDCCH 225, the base station may transmit data transmission by sending DMRS 235 (followed by PDSCH 230). In a general sense, data transmission may correspond to PDSCH 230, and the channel estimation used for data transmission is based on DMRS 235. Data transmission may be transmitted using all available subbands supporting the BWP (e.g., reduced bandwidth supported by the UE type).

[0121] In the third example, the resource allocation scheme may correspond to slot configuration 215. Slot configuration 215 illustrates an example of repeated data transmission distributed across the BWP and using data transmission within slots, where the repetition rate is based on UE type. Slot configuration 215 may include PDCCH 225 (e.g., downlink grants for downlink resources) distributed across the entire BWP. PDCCH 225 may carry or otherwise transmit indications of downlink resources according to the resource allocation scheme (e.g., according to slot configuration 215). PDCCH 225 may span the first symbol of a slot. During the first symbol following PDCCH 225, the base station may transmit data transmission by sending DMRS 235 (followed by a first transmission of PDSCH 230 and one or more repetitions of PDSCH 230 (where two repetitions are shown only by example)) during the slot. In a broader sense, data transmission may correspond to PDSCH 230, and the channel estimation used for data transmission is based on DMRS 235. Data transmission can be sent using all available subbands supporting the BWP (e.g., reduced bandwidth supported by the UE type). Therefore, slot configuration 215 illustrates an example resource allocation using wideband short PDSCH 230s with in-slot repetition (e.g., sub-slot-based PDSCHs with approximately 1-3 symbols in a slot). PDSCH 230 repetitions can share DMRS 235 (as shown in slot configuration 215) or can have associated in-slot DMRSs for multiple PDSCH repetitions.

[0122] In the fourth example, the resource allocation scheme may correspond to time slot configuration 220. Time slot configuration 220 illustrates an example of data transmission distributed across a narrowband long PDSCH 230 between / within a BWP using inter-slot frequency hopping, based on UE type. More specifically, time slot configuration 220 illustrates an example where a first portion of the data transmission is transmitted in a first time slot and on a first subband supporting the BWP, and a second portion of the data transmission is transmitted in a second time slot and on a second subband supporting the BWP, wherein the first and second subbands are different. In the first time slot, time slot configuration 220 may include a PDCCH 225 (e.g., downlink grant for downlink resources) distributed across the entire BWP. PDCCH 225 may carry or otherwise transmit indications of downlink resources according to the resource allocation scheme (e.g., according to time slot configuration 220). PDCCH 225 may span the first symbol of the time slot. During the first symbol following PDCCH 225 and on the first subband, the base station can transmit data by sending DMRS 235 (followed by a first transmission of PDSCH 230 in the first subband, e.g., a first portion of data transmission)). In the second time slot, time slot configuration 220 may include PDCCH 225 distributed across the entire BWP (e.g., downlink grants for downlink resources). In some examples, PDCCH 225 in the second time slot may be optional (e.g., PDCCH 225 in the first time slot may be scheduled for data transmission in the second time slot). During the first symbol following PDCCH 225 and on the second subband, the base station can transmit data by sending DMRS 235 (followed by a second transmission of PDSCH 230 in the second subband, e.g., a second portion of data transmission)). Generally, data transmission may correspond to PDSCH 230 and DMRS 235 in both the first and second time slots. Data transmission may be transmitted using a subset of available subbands supporting the BWP (e.g., reduced bandwidth supported by the UE type). Therefore, slot configuration 220 illustrates an exemplary resource allocation scheme using a narrowband / long PDSCH 230 (e.g., a slot-based PDSCH) with inter-BWP / intra-BWP and inter-slot frequency hopping.

[0123] Therefore, the UE and the base station can transmit downlink grants and corresponding downlink data transmissions scheduled by the downlink grants according to the resource allocation scheme. The resource allocation scheme can correspond to one or more of time slot configurations 205, 210, 215 and / or 220.

[0124] In some aspects, PDSCH scrambling sequences can be used. The initialization seed for the scrambling sequence used in NR PDSCH can be defined as c. init =n RNTI *215 +q*2 14 +n ID Where q is the codeword index, and n ID It is either the cell ID or the sequence ID, and n RNTI This is the RNTI associated with the PDSCH. For UE types with reduced capabilities (e.g., NR light UEs), repeating the PDSCH using the same scrambling sequence may be detrimental to interference randomization. Therefore, aspects of the described technique can introduce a time-varying initialization seed for the scrambling sequence used by UE types with reduced capabilities. PDSCH repetition / frequency hopping can be defined as c init =n RNTI *2 15 +q*2 14 +n s *2 10 +n ID , where n s It is the slot index within a radio frame with values ​​{0, ..., 9}. Alternatively, n s It can refer to the repeating index of PDSCH with values ​​{0, ..., 15}.

[0125] Figure 3 An example set of time slot configurations 300 supporting PDSCH resources for UEs with reduced capabilities, according to various aspects of this disclosure, is illustrated. In some examples, the example time slot configuration set 300 may implement aspects of wireless communication system 100 and / or example time slot configuration set 200. The aspects of the example time slot configuration set 300 may be implemented by the UE, base station, and / or network entity (e.g., MME) (which may be examples of the corresponding devices described herein). Specifically, when the UE is operating in RRC connected mode, the aspects of the example time slot configuration set 300 may be implemented by the base station, and / or when the UE is operating in RRC inactive or RRC idle mode, the aspects of the example time slot configuration set 300 may be implemented in the network entity. In another example, the UE may report this capability to the network entity (e.g., to the MME via NAS signaling). The base station performs UE characteristics based on relevant information obtained from the network entity. More broadly, the example time slot configuration set 300 illustrates four examples of time slot configurations for supporting PDSCH enhancements for UE types with reduced capabilities.

[0126] As mentioned above, some wireless communication systems can utilize various frequency, time, and / or spatial diversity techniques to improve system throughput and performance. While some UE types support such diversity schemes, others may not. For example, some UE types may be associated with UEs with reduced or limited capabilities (e.g., reduced bandwidth, fewer antennas, or extended battery life). Therefore, references to UE types in this document generally refer to these reduced-capability UEs.

[0127] For example, some UE types with reduced capabilities may be associated with small downlink packet transmissions (e.g., NR light UEs). This may include transport block sizes (TBS) between 16 and 100 (e.g., a minimum TBS of 24 in NR and a minimum TBS of 16 in LTE NBIoT). Such techniques may include using a minimum MCS (e.g., MCS0) where the modulation order (M) for QPSK is two, the coding rate (R) is 30 / 1024, and the formula N... info =8*floor(M*R*N RB *12*N symbol ) / 8, where N symbol =ceiling(N info / (M*R*N RB *12)). However, aspects of the described techniques can introduce TB scaling factors for data transmissions with lower TB. Scaling factors can be indicated in DCI (e.g., downlink grant), RRC signaling, etc. Scaling factors can be applied according to the following table:

[0128]

[0129] Therefore, the scaling factor can be set to a value of 1, 0.5, 0.25, or 0.125, and N can be set to... info =8*floor(M*R*N RB *12*N symbol ) / 8 changed to N info =8*floor(S*M*R*N RB *12*N symbol ) / 8. Then, when a scaling factor is applied, the equivalent coding rate can be S*R. Therefore, aspects of the described technique can be identified, at least in part, based on the scaling factor of TBS, for data transmission using a low coding rate, the scaling factor being at least in part based on the UE type.

[0130] Therefore, the described aspects of the technology provide various mechanisms to enhance communication for such UE types (e.g., UE types with reduced capabilities). For example, the UE may send or otherwise provide a UE capability message to a base station (and / or via the base station to a network entity) that carries or otherwise transmits an indication of the UE type. As discussed, a UE type may be associated with, for example, a UE with reduced bandwidth, a reduced number of antennas, a low transmit power level, little or no mobility, enhanced power savings / extended battery life, or reduced capabilities. The UE capability message may be provided during initial connection (e.g., using one or more RRC signals, MAC CE, etc.) or during registration (e.g., using NAS signaling to a network entity) or afterward.

[0131] Base stations (or network entities) can typically select a resource allocation scheme for a UE, which can be used to send downlink grants and / or data transmissions to the UE based on the UE type. Example slot configuration set 300 illustrates four non-limiting examples of slot configurations that can be components of such resource allocation schemes according to various aspects of the described technology. Specifically, example slot configuration set 300 illustrates two examples where TBS = 16 (e.g., a lower TBS supported by legacy LTE NB IoT) and two other examples where TBS = 24 (e.g., the lowest TBS supported by legacy NR UEs).

[0132] In the first example, the resource allocation scheme may correspond to slot configuration 305. Slot configuration 305 illustrates an example where the scaling factor is set to 1 and the TBS is 16. Slot configuration 305 may include PDCCH 325 (e.g., for granting downlink resources) transmitted in the first three symbols of the slot. PDCCH 325 may carry or otherwise transmit an indication of downlink resources according to the resource allocation scheme (e.g., according to slot configuration 305). During the first symbol following PDCCH 325, the base station may transmit data transmission by transmitting DMRS 335 in one symbol (followed by PDSCH 330 in the next symbol). In a broader sense, data transmission may correspond to both PDSCH 330 and DMRS 335. Data transmission may be transmitted using available subbands throughout the BWP (e.g., reduced bandwidth supported by the UE type).

[0133] In the second example, the resource allocation scheme may correspond to slot configuration 310. Slot configuration 310 illustrates an example where the scaling factor is set to 0.125 and the TBS is 16. Slot configuration 310 may include PDCCH 325 (e.g., for granting downlink resources) transmitted in the first three symbols of the slot. PDCCH 325 may carry or otherwise transmit indications of downlink resources according to the resource allocation scheme (e.g., according to slot configuration 310). Starting at the first symbol after PDCCH 325, the base station may transmit data transmission by transmitting DMRS 335 (followed by PDSCH 330 in the next eight symbols of the slot). In a broader sense, data transmission may correspond to both PDSCH 330 and DMRS 335. Data transmission may be transmitted using available subbands throughout the BWP (e.g., reduced bandwidth supported by the UE type).

[0134] In the third example, the resource allocation scheme may correspond to slot configuration 315. Slot configuration 315 illustrates an example where the scaling factor is set to 1 and the TBS is 24. Slot configuration 315 may include PDCCH 325 (e.g., for granting downlink resources) transmitted in the first three symbols of the slot. PDCCH 325 may carry or otherwise transmit an indication of downlink resources according to the resource allocation scheme (e.g., according to slot configuration 315). During the first symbol following PDCCH 325, the base station may transmit data by transmitting DMRS 335 (followed by PDSCH 330 in the next two symbols). In a broader sense, data transmission may correspond to both PDSCH 330 and DMRS 335. Data transmission may be transmitted using available subbands throughout the BWP (e.g., reduced bandwidth supported by the UE type).

[0135] In the fourth example, the resource allocation scheme may correspond to slot configuration 320. Slot configuration 320 illustrates an example where the scaling factor is set to 0.125 and the TBS is 24. Slot configuration 320 may include a PDCCH 325 (e.g., for granting downlink resources) transmitted in the first symbol of the slot. PDCCH 325 may carry or otherwise transmit indications of downlink resources according to the resource allocation scheme (e.g., according to slot configuration 320). During the first symbol following PDCCH 325, the base station may transmit data by transmitting DMRS 335 (followed by PDSCH 330 in the next 12 symbols). In a broader sense, data transmission may correspond to both PDSCH 330 and DMRS 335. Data transmission may be transmitted using available subbands throughout the BWP (e.g., reduced bandwidth supported by the UE type).

[0136] Therefore, the UE and the base station can transmit downlink grants and corresponding downlink data transmissions scheduled by the downlink grants according to the resource allocation scheme. The resource allocation scheme can correspond to one or more of time slot configurations 305, 310, 315 and / or 320.

[0137] Figure 4 An example set of time slot configurations 400 supporting PDSCH resources for UEs with reduced capabilities, according to various aspects of this disclosure, is illustrated. In some examples, the example time slot configuration set 400 may implement aspects of wireless communication system 100 and / or example time slot configuration sets 200 and / or 300. The aspects of the example time slot configuration set 400 may be implemented by the UE, a base station, and / or a network entity (e.g., an MME) (which may be examples of the corresponding devices described herein). Specifically, when the UE is operating in RRC connected mode, the aspects of time slot configuration 400 may be implemented by the base station, and / or when the UE is operating in RRC inactive or RRC idle mode, the aspects of time slot configuration 400 may be implemented in the network entity. In another example, the UE may report this capability to the network entity (e.g., to the MME via NAS signaling). The base station performs UE characteristics based on relevant information obtained from the network entity. More broadly, the example time slot configuration set 400 illustrates two examples of time slot configurations for supporting PDSCH enhancements for UE types with reduced capabilities.

[0138] As mentioned above, some wireless communication systems can utilize various frequency, time, and / or spatial diversity techniques to improve system throughput and performance. While some UE types support such diversity schemes, others may not. For example, some UE types may be associated with UEs with reduced or limited capabilities (e.g., reduced bandwidth, fewer antennas, or extended battery life). Therefore, references to UE types in this document generally refer to these reduced-capability UEs.

[0139] Therefore, the described aspects of the technology provide various mechanisms to enhance communication for such UE types (e.g., UE types with reduced capabilities). For example, the UE may send or otherwise provide a UE capability message to a base station (and / or via the base station to a network entity) that carries or otherwise transmits an indication of the UE type. As discussed, a UE type may be associated with, for example, a UE with reduced bandwidth, a reduced number of antennas, a low transmit power level, little or no mobility, enhanced power savings / extended battery life, or reduced capabilities. The UE capability message may be provided during initial connection (e.g., using one or more RRC signals, MAC CE, etc.) or during registration (e.g., using NAS signals to a network entity) or afterward.

[0140] Base stations (or network entities) can typically select a resource allocation scheme for a UE, which can be used to send downlink grants and / or data transmissions to the UE based on the UE type. In some aspects, the described techniques can support PDSCH repetition within a time slot. In some aspects, this can include DMRS425 using the same frequency domain resource allocation between time slots, which may not overlap with symbols carrying PDSCH 420. The DMRS 425 type / symbol location can be indicated by RRC signaling, DCI (e.g., downlink grant), etc. Example time slot configuration set 400 illustrates two non-limiting examples of time slot configurations that can be components of such resource allocation schemes according to aspects of the described techniques.

[0141] In the first example, the selected resource allocation scheme may correspond to slot configuration 405. Slot configuration 405 illustrates an example where DMRS 425 is for each UE and shared by all repeated PDSCH 420s in the same slot. Slot configuration 405 may include PDCCH 415 (e.g., for granting downlink resources) transmitted in the first symbol of the slot. PDCCH 415 may carry or otherwise transmit an indication of downlink resources according to the resource allocation scheme (e.g., according to slot configuration 405). During the first two symbols following PDCCH 415, the base station may transmit data by transmitting DMRS 425 (followed by the first transmission of PDSCH 420 and one or more repetitions of PDSCH 420 during the slot (two repetitions are shown by way of example only)). In a broader sense, data transmission may correspond to PDSCH 420, each repetition of PDSCH 420, and DMRS 425. Additional DMRS 425 transmissions can be provided in one or more repetitions of the PDSCH 420 repetition (where only one DMRS 425 is shown in the second repetition by way of example only). Data transmissions can be sent using all available subbands that support BWP (e.g., reduced bandwidth supported by UE type).

[0142] Therefore, slot configuration 405 illustrates an example resource allocation where a preload DMRS 425 is configured, and one (or more) additional DMRS 425 can also be configured. For a small number of PDSCH symbols, some wireless communications may not support additional DMRS 425. When the UE is configured for in-slot repetition, additional DMRS 425 can be configured to improve channel estimation. The total number of PDSCH 420 symbols configured in in-slot repetition can be used for reusing DMRS 425 mode configurations. DMRS 425 in the same slot can be jointly decoded for channel estimation. Therefore, slot configuration 405 can support identifying DMRS configurations for the first transmission and repetition transmissions within a slot. Alternatively or concurrently, aspects of slot configuration 405 can support a first DMRS 425 during the first portion of a slot (e.g., during the first PDSCH 420 transmission) and a second DMRS transmission during the second portion of a slot (e.g., during the repetition transmission of PDSCH 420).

[0143] In the second example, the resource allocation scheme may correspond to slot configuration 410. Slot configuration 410 illustrates an example where DMRS 425 is per UE and may not be shared by all repeated PDSCH 420s in the same slot. Slot configuration 410 may include PDCCH 415 (e.g., for granting downlink resources) transmitted in the first symbol of the slot. PDCCH 415 may carry or otherwise transmit an indication of downlink resources according to the resource allocation scheme (e.g., according to slot configuration 405). During the first symbol following PDCCH 415, the base station may transmit data by transmitting DMRS 425 (followed by a first transmission of PDSCH 420 and one or more retransmissions of PDSCH 420 during the slot (two retransmissions are shown by way of example only)) during the first symbol. In slot configuration 410, each repetition of PDSCH 420 is preceded by DMRS 425; for example, each transmission / repetition of PDSCH 420 may be configured with its own corresponding DMRS 425 transmission. In a broad sense, data transmission can correspond to PDSCH 420, each repetition of PDSCH 420, and DMRS425. Data transmission can be sent using all available subbands that support BWP (e.g., reduced bandwidth supported by UE type).

[0144] Therefore, time slot configuration 410 illustrates an example resource allocation scheme in which a preload DMRS 425 is repeatedly configured for each PDSCH 420. In some examples, the same DMRS pattern can be reused for PDSCH 420 repetitions; for example, a preload DMR can be configured for each PDSCH 420 repetition. Thus, time slot configuration 410 can support identifying the DMRS configuration for the first transmission and repetition transmissions within a time slot. Alternatively or additionally, aspects of time slot configuration 410 can support a first DMRS 425 during the first portion of a time slot (e.g., during the first PDSCH 420 transmission) and a second DMRS transmission during the second portion of a time slot (e.g., during each repetition transmission of PDSCH 420).

[0145] Therefore, the UE and the base station can transmit downlink grants and corresponding downlink data transmissions scheduled by the downlink grants according to the resource allocation scheme. The resource allocation scheme can correspond to one or more of time slot configurations 405 and / or 410.

[0146] Figure 5 An example set of time slot configurations 500 supporting PDSCH resources for UEs with reduced capabilities, according to various aspects of this disclosure, is illustrated. In some examples, the example time slot configuration set 500 may implement aspects of wireless communication system 100 and / or example time slot configuration sets 200, 300, and / or 400. The aspects of the example time slot configuration set 500 may be implemented by the UE, a base station, and / or a network entity (e.g., an MME) (which may be examples of the corresponding devices described herein). Specifically, when the UE is operating in RRC connected mode, the aspects of the example time slot configuration set 500 may be implemented by the base station, and / or when the UE is operating in RRC inactive or RRC idle mode, the aspects of the example time slot configuration set 500 may be implemented in the network entity. In another example, the UE may report this capability to the network entity (e.g., to the MME via NAS signaling). The base station performs UE characteristics based on relevant information obtained from the network entity. More broadly, the example time slot configuration set 500 illustrates three examples of time slot configurations for supporting PDSCH enhancements for UE types with reduced capabilities.

[0147] As mentioned above, some wireless communication systems can utilize various frequency, time, and / or spatial diversity techniques to improve system throughput and performance. While some UE types support such diversity schemes, others may not. For example, some UE types may be associated with UEs with reduced or limited capabilities (e.g., reduced bandwidth, fewer antennas, or extended battery life). Therefore, references to UE types in this document generally refer to these reduced-capability UEs.

[0148] Therefore, the described aspects of the technology provide various mechanisms to enhance communication for such UE types (e.g., UE types with reduced capabilities). For example, the UE may send or otherwise provide a UE capability message to a base station (and / or via the base station to a network entity) that carries or otherwise transmits an indication of the UE type. As discussed, a UE type may be associated with, for example, a UE with reduced bandwidth, a reduced number of antennas, a low transmit power level, little or no mobility, enhanced power savings / extended battery life, or reduced capabilities. The UE capability message may be provided during initial connection (e.g., using one or more RRC signals, MAC CE, etc.) or during registration (e.g., using NAS signals to a network entity) or afterward.

[0149] Base stations (or network entities) can typically select a resource allocation scheme for a UE, which can be used to send downlink grants and / or data transmissions to the UE based on the UE type. In some aspects, the described techniques can support intra-slot PDSCH repetition. In some aspects, this can include repetition of each PDSCH using the same frequency domain resource allocation in the same link or multiple allocated resources, but possibly with different start symbol positions. In some examples, this configuration can be notified via RRC signaling, signaled in DCI, etc., or otherwise indicated. Example slot configuration set 500 illustrates three non-limiting examples of slot configurations that can be components of the selected resource allocation scheme according to various aspects of the described techniques.

[0150] In the first example, the selected resource allocation scheme may correspond to slot configuration 505. Slot configuration 505 illustrates an example in which an explicit start symbol offset is indicated relative to each PDSCH repetition within the slot. This may include avoiding symbol overlap with DMRS symbols. Slot configuration 505 may include PDCCH 520 (e.g., for granting downlink resources) transmitted in the first symbol of the slot. PDCCH 520 may carry or otherwise transmit an indication of downlink resources depending on the resource allocation scheme (e.g., according to slot configuration 505). During the first two symbols following PDCCH 520, the base station may transmit data by transmitting DMRS 530 (followed by a first transmission of PDSCH 525 and one or more repetitions of PDSCH 525 during the slot (two repetitions are shown by way of example only)). In some examples, one or more repetitions of PDSCH 525 may include another transmission of DMRS 530 in the first symbol of the repetition. In a broad sense, data transmission can correspond to PDSCH 525, each repetition of PDSCH 525, and DMRS 530. Data transmission can be sent using all available subbands supporting the BWP (e.g., reduced bandwidth supported by the UE type). Therefore, slot configuration 505 illustrates an example resource allocation scheme, indicating the starting symbol offset value relative to each PDSCH 525 repetition within the slot. DMRS 530 can avoid or otherwise prevent symbol overlap with those used to transmit PDSCH 525 and / or one or more repetitions of PDSCH 525. The first transmission of PDSCH 525 and repetitions of PDSCH 525 within a slot can use the same or different symbol configurations within the slot.

[0151] In the second example, the resource allocation scheme may correspond to slot configuration 510. Slot configuration 510 illustrates an example in which an implicit start symbol offset is indicated relative to each PDSCH repetition within the slot. This may include avoiding overlap between data symbols and DMRS symbols. Slot configuration 510 may include PDCCH 520 (e.g., for granting downlink resources) transmitted in the first symbol of the slot. PDCCH 520 may carry or otherwise transmit an indication of downlink resources depending on the resource allocation scheme (e.g., according to slot configuration 510). During the first two symbols following PDCCH 520, the base station may transmit data by transmitting DMRS 530 (followed by a first transmission of PDSCH 525 and one or more repetitions of PDSCH 525 during the slot (two repetitions are shown by way of example only)). In this example, one or more repetitions of PDSCH 525 do not include another transmission of DMRS 530.

[0152] In a general sense, data transmission can correspond to PDSCH 525, each repetition of PDSCH 525, and DMRS 530. Data transmission can be sent using all available subbands supporting the BWP (e.g., reduced bandwidth supported by the UE type). Therefore, slot configuration 510 illustrates an example resource allocation scheme where an implicit indication of the starting symbol is provided by introducing a downlink aggregation factor for PDSCH repetitions within a slot. The starting symbol for each PDSCH repetition can be implicitly indicated by selecting or otherwise using the first starting symbol (S) and the length (L) of the number of symbols in the DMRS symbol pattern or configuration. If all repetitions of PDSCH 525 share only the preceding DMRS, then S+L*index_rep can correspond to the starting symbol for each PDSCH 525 repetition. The first transmission of PDSCH 525 and the repetition of PDSCH 525 within a slot can use the same or different symbol configurations within the slot. This may include identifying a first start symbol for the first transmission of PDSCH 525 and a second start symbol for the repeated transmission of PDSCH 525 based on an aggregation factor for repetition within the time slot.

[0153] In the third example, the resource allocation scheme may correspond to slot configuration 515. Slot configuration 515 illustrates an example in which an implicit start symbol offset is indicated relative to each PDSCH repetition within the slot. This may include avoiding overlap between data symbols and DMRS symbols. Slot configuration 515 may include PDCCH 520 (e.g., for granting downlink resources) transmitted in the first symbol of the slot. PDCCH 520 may carry or otherwise transmit an indication of downlink resources according to the resource allocation scheme (e.g., according to slot configuration 515). During the first symbol following PDCCH 520, the base station may transmit data by transmitting DMRS 530 (followed by a first transmission of PDSCH 525 and one or more repetitions of PDSCH 525 during the slot (two repetitions are shown by way of example only)).

[0154] In this example, each repetition of PDSCH 525 includes another transmission of DMRS 530 (e.g., preload DMRS) in the first symbol of the repetition. In a broader sense, data transmission can correspond to PDSCH 525, each repetition of PDSCH 525, and each transmission of DMRS 530. Data transmission can be sent using all available subbands supporting the BWP (e.g., reduced bandwidth supported by the UE type). Therefore, slot configuration 515 illustrates an example resource allocation scheme where an implicit indication of the starting symbol is provided by introducing a downlink aggregation factor for the PDSCH 525 repetition within a slot. The starting symbol for each PDSCH repetition can be implicitly indicated by selecting or otherwise using a first starting symbol (S) and the length (L) of the symbol count, as well as the DMRS symbol pattern. If each repetition of PDSCH uses the same DMRS pattern (as shown in slot configuration 515), then S+(L+D)*index_rep can correspond to the starting symbol for each PDSCH 525 repetition. DMRS symbols within a slot can be correlated and jointly used for channel estimation.

[0155] Therefore, the UE and the base station can transmit downlink grants and corresponding downlink data transmissions scheduled by the downlink grants according to the resource allocation scheme. The resource allocation scheme can correspond to one or more of time slot configurations 505, 510, and / or 515.

[0156] Figure 6 An example time slot configuration set 600 supporting PDSCH resources for UEs with reduced capabilities is illustrated according to various aspects of this disclosure. In some examples, the example time slot configuration set 600 may implement aspects of wireless communication system 100 and / or example time slot configuration sets 200, 300, 400 and / or 500. The aspects of the example time slot configuration set 600 may be implemented by the UE, base station and / or network entity (e.g., MME) (which may be examples of the corresponding devices described herein). Specifically, when the UE is operating in RRC connected mode, the aspects of the example time slot configuration set 600 may be implemented by the base station, and / or when the UE is operating in RRC inactive or RRC idle mode, the aspects of the example time slot configuration set 600 may be implemented in the network entity. In another example, the UE may report this capability to the network entity (e.g., to the MME via NAS signaling). The base station performs UE characteristics based on relevant information obtained from the network entity. More broadly, the example time slot configuration set 600 illustrates two examples of time slot configurations for supporting PDSCH enhancements for UE types with reduced capabilities.

[0157] As mentioned above, some wireless communication systems can utilize various frequency, time, and / or spatial diversity techniques to improve system throughput and performance. While some UE types support such diversity schemes, others may not. For example, some UE types may be associated with UEs with reduced or limited capabilities (e.g., reduced bandwidth, fewer antennas, or extended battery life). Therefore, references to UE types in this document generally refer to these reduced-capability UEs.

[0158] Therefore, the described aspects of the technology provide various mechanisms to enhance communication for such UE types (e.g., UE types with reduced capabilities). For example, the UE may send or otherwise provide a UE capability message to a base station (and / or via the base station to a network entity) that carries or otherwise transmits an indication of the UE type. As discussed, a UE type may be associated with, for example, a UE with reduced bandwidth, a reduced number of antennas, a low transmit power level, little or no mobility, enhanced power savings / extended battery life, or reduced capabilities. The UE capability message may be provided during initial connection (e.g., using one or more RRC signals, MAC CE, etc.) or during registration (e.g., using NAS signals to a network entity) or afterward.

[0159] Base stations (or network entities) can typically select a resource allocation scheme for a UE, which can be used to send downlink grants and / or data transmissions to the UE based on the UE type. In some aspects, the described techniques can support inter-slot and / or intra-slot PDSCH repetition. In some aspects, this can include repetition of each PDSCH using resources allocated in the same frequency domain. Example slot configuration set 600 illustrates two non-limiting examples of slot configurations that can be components of such resource allocation schemes according to aspects of the described techniques.

[0160] In the first example, the resource allocation scheme may correspond to slot configuration 605. Slot configuration 605 illustrates an example where, when intra-slot repetition is configured, the UE can report its HARQ-ACK information after the last PDSCH in the aggregated PDSCH within the same slot (e.g., the initial PDSCH transmission and each repetition). This avoids requiring short processing time from the UE. Slot configuration 605 may include PDCCH 625 (e.g., for granting downlink resources) transmitted in the first symbol of the slot. PDCCH 625 may carry or otherwise transmit an indication of downlink resources according to the resource allocation scheme (e.g., according to slot configuration 605). During the first two symbols following PDCCH 625, the base station may transmit data by transmitting DMRS 635 (followed by a first transmission of PDSCH 630 and one or more repetitions of PDSCH 630 during the slot (two repetitions are shown by way of example only)). The UE can then transmit its HARQ 610 in subsequent slots. Data transmission can correspond to PDSCH 630, each repetition of PDSCH 630, and DMRS 635. Data transmission can be sent using all available subbands supporting the BWP (e.g., reduced bandwidth supported by the UE type). Therefore, slot configuration 605 illustrates an example resource allocation scheme where the UE can report its HARQ-ACK information (e.g., HARQ 610) after the last PDSCH 630 transmission or repetition. If the UE can detect a PDSCH 630 with early termination (e.g., resuming data from the first PDSCH 630 transmission or using one of the earlier repetitions), the HARQ 610 timing can start counting from the end of the last PDSCH 630 repetition in the last slot of the aggregated PDSCH. Therefore, the UE can send feedback signals (e.g., HARQ 610) for data transmission during subsequent slots. Subsequent slots can be configured to have time slots for processing and can be based on the slots in which the first PDSCH 630 and repetitions of PDSCH 630 transmissions are performed.

[0161] In the second example, the resource allocation scheme may correspond to slot configuration 615. Slot configuration 615 illustrates an example where, when inter-slot repetition is configured in addition to inter-slot repetition, the UE can report its HARQ-ACK information after the last PDSCH in the last slot of the aggregated PDSCH (e.g., the initial PDSCH transmission and each repetition). This avoids requiring short processing time for the UE. Slot configuration 615 may include PDCCH 625 (e.g., for granting downlink resources) transmitted in the first symbol of the first time slot. PDCCH 625 may carry or otherwise transmit an indication of downlink resources according to the resource allocation scheme (e.g., according to slot configuration 615). During the first two symbols following PDCCH 625 in the first time slot, the base station may transmit data by transmitting DMRS 635 (followed by a first transmission of PDSCH 630 and one or more repetitions of PDSCH 630 during the first time slot (two repetitions are shown by way of example only)). Slot configuration 615 may include PDCCH 625 (e.g., for granting downlink resources), optionally transmitted in the first symbol of the second time slot (e.g., PDCCH 625 transmitted in the first time slot may schedule data transmission in the second time slot). PDCCH 625 transmitted in the second time slot may carry or otherwise convey indications of downlink resources according to a resource allocation scheme (e.g., according to slot configuration 615). During the first two symbols following PDCCH 625 in the second time slot, the base station may transmit data by transmitting DMRS 635 (followed by a first transmission of PDSCH 630 and one or more repetitions of PDSCH 630 during the second time slot (two repetitions are shown by way of example only)). The UE may then transmit its HARQ 620 in subsequent time slots. Data transmission may correspond to the aggregation of PDSCH 630 transmissions, each repetition of PDSCH 630, and DMRS 635. Data transmission can be sent using all available subbands that support BWP (e.g., reduced bandwidth supported by UE type).

[0162] Therefore, time slot configuration 615 illustrates an example resource allocation scheme where the UE can report its HARQ-ACK information (e.g., HARQ 610) after the transmission of the last PDSCH 630 in the last time slot of the aggregated PDSCH. If the UE can detect a PDSCH 630 with early termination (e.g., data recovery from a first PDSCH 630 transmission or an earlier repetition), the HARQ 620 timing can start counting from the end of the repetition of the last PDSCH 630 in the last time slot of the aggregated PDSCH. Thus, time slot configuration 615 can support one or more additional repetitions of data transmission in a second time slot and a feedback signal (e.g., HARQ 620) provided during a subsequent time slot having a time slot for processing by the UE and based on the second time slot in which the repetitions occur.

[0163] Therefore, the UE and the base station can transmit downlink grants and corresponding downlink data transmissions scheduled by the downlink grants according to the resource allocation scheme. The resource allocation scheme can correspond to one or more of time slot configurations 605 and / or 610.

[0164] Figure 7 An example of a time slot configuration 700 supporting PDSCH resources for a UE with reduced capabilities, according to various aspects of this disclosure, is shown. In some examples, time slot configuration 700 may implement aspects of wireless communication system 100 and / or example time slot configuration sets 200, 300, 400, 500, and / or 600. The aspects of time slot configuration 700 may be implemented by the UE, a base station, and / or a network entity (e.g., an MME) (which may be examples of the corresponding devices described herein). Specifically, when the UE is operating in RRC connected mode, the aspects of time slot configuration 700 may be implemented by the base station, and / or when the UE is operating in RRC inactive or RRC idle mode, the aspects of time slot configuration 700 may be implemented in the network entity. In another example, the UE may report this capability to the network entity (e.g., to the MME via NAS signaling). The base station performs UE characteristics based on relevant information obtained from the network entity. More broadly, time slot configuration 700 illustrates an example of a time slot configuration for supporting PDSCH enhancements for UE types with reduced capabilities.

[0165] As mentioned above, some wireless communication systems can utilize various frequency, time, and / or spatial diversity techniques to improve system throughput and performance. While some UE types support such diversity schemes, others may not. For example, some UE types may be associated with UEs with reduced or limited capabilities (e.g., reduced bandwidth, fewer antennas, or extended battery life). Therefore, references to UE types in this document generally refer to these reduced-capability UEs.

[0166] Therefore, the described aspects of the technology provide various mechanisms to enhance communication for such UE types (e.g., UE types with reduced capabilities). For example, the UE may send or otherwise provide a UE capability message to a base station (and / or via the base station to a network entity) that carries or otherwise transmits an indication of the UE type. As discussed, a UE type may be associated with, for example, a UE with reduced bandwidth, a reduced number of antennas, a low transmit power level, little or no mobility, enhanced power savings / extended battery life, etc. UE capability messages may be provided during initial connection (e.g., using one or more RRC signals, MAC CE, etc.) or during registration (e.g., using NAS signals to a network entity), etc.

[0167] Base stations (or network entities) can typically select a resource allocation scheme for a UE, which can be used to send downlink grants and / or data transmissions to the UE based on the UE type. In some aspects, the described techniques can support inter-slot and / or intra-slot PDSCH repetition. In some aspects, this can include per-PDSCH repetition using different frequency domain resource allocations in different time slots. Time slot configuration 700 illustrates a non-limiting example of such a resource allocation scheme according to various aspects of the described techniques.

[0168] Slot configuration 700 illustrates an example where each PDSCH repetition can occur in different slots and can use the same time-domain resource allocation, but with different frequency-domain locations depending on the frequency hopping mode. Slot configuration 700 also illustrates an example of configuring BWP frequency hopping within a slot for each BWP, which can support or otherwise allow the use of different or the same frequency hopping modes in different BWPs. The frequency hopping mode can be carried in RRC signaling, DCI, etc., or otherwise transmitted.

[0169] The time slot configuration 700 may include a PDCCH 710 transmitted in the first symbol of the first time slot (e.g., for granting downlink resources). The PDCCH 710 may carry or otherwise transmit indications of downlink resources according to a resource allocation scheme (e.g., according to the time slot configuration 700). During the first symbol following the PDCCH 710 in the first time slot, the base station may transmit data by transmitting DMRS 720 (followed by a transmission of PDSCH 715). The time slot configuration 700 may optionally include a PDCCH 710 transmitted in the first symbol of the second time slot (e.g., the PDCCH 710 transmitted in the first time slot may schedule data transmission in the second time slot). When transmitted, the PDCCH 710 may carry or otherwise transmit indications of downlink resources according to a resource allocation scheme (e.g., according to the time slot configuration 700). During the first symbol period following PDCCH 710 in the second time slot, the base station can transmit data by sending DMRS 720 (followed by a repeat of PDSCH 715). Data transmission can correspond to PDSCH 715, each repeat of PDSCH 715, and DMRS 720. Data transmission can be transmitted using a subset of available subbands in the BWP (e.g., reduced bandwidth supported by the UE type), where frequency hopping occurs for different time slots.

[0170] Therefore, slot configuration 700 illustrates an example resource allocation scheme where the downlink aggregation level per hop can be based on the bundle size, at least in some respects. This may also include providing RB offset indication. Frequency hopping may result in foldback situations (e.g., the starting and ending RBs may be located at two edges supporting BWP). In some respects, the timing location may be the same relative to the slot boundaries of each slot.

[0171] Therefore, the UE and base station can transmit downlink grants and corresponding downlink data transmissions scheduled by the downlink grants according to the resource allocation scheme. The resource allocation scheme can correspond to a time slot configuration of 700.

[0172] Figure 8An example set of time slot configurations 800 supporting PDSCH resources for UEs with reduced capabilities, according to various aspects of this disclosure, is illustrated. In some examples, the example time slot configuration set 800 may implement aspects of wireless communication system 100 and / or example time slot configuration sets 200, 300, 400, 500, 600, and / or time slot configuration 700. The aspects of the example time slot configuration set 800 may be implemented by the UE, base station, and / or network entity (e.g., MME) (which may be examples of the corresponding devices described herein). Specifically, when the UE is operating in RRC connected mode, the aspects of the example time slot configuration set 800 may be implemented by the base station, and / or when the UE is operating in RRC inactive or RRC idle mode, the aspects of the example time slot configuration set 800 may be implemented in the network entity. More broadly, the example time slot configuration set 800 illustrates possible examples of time slot configurations for supporting PDSCH enhancements for UE types with reduced capabilities.

[0173] As mentioned above, some wireless communication systems can utilize various frequency, time, and / or spatial diversity techniques to improve system throughput and performance. While some UE types support such diversity schemes, others may not support all of these techniques. For example, some UE types may be associated with UEs with reduced or limited capabilities (e.g., reduced bandwidth, fewer antennas, or extended battery life). Therefore, references to UE types in this document generally refer to these reduced-capability UEs.

[0174] Therefore, the described aspects of the technology provide various mechanisms to enhance communication for such UE types (e.g., UE types with reduced capabilities). For example, the UE may send or otherwise provide a UE capability message to a base station (and / or via the base station to a network entity) that carries or otherwise transmits an indication of the UE type. As discussed, a UE type may be associated with, for example, a UE with reduced bandwidth, a reduced number of antennas, a low transmit power level, little or no mobility, enhanced power savings / extended battery life, etc. UE capability messages may be provided during initial connection (e.g., using one or more RRC signals, MAC CE, etc.) or during registration (e.g., using NAS signals to a network entity), etc.

[0175] Base stations (or network entities) can typically select a resource allocation scheme for a UE, which can be used to send downlink grants and / or data transmissions to the UE based on the UE type. In some aspects, the described techniques can support inter-slot and / or intra-slot PDSCH repetition. In some aspects, this can include per-PDSCH repetition using different frequency domain resource allocations in different time slots. Example time slot configuration set 800 illustrates non-limiting examples of time slot configurations that can be such resource allocation schemes according to aspects of the described techniques.

[0176] In one example, the selected resource allocation scheme may correspond to time slot configuration 805. Time slot configuration 805 illustrates an example where each PDSCH repetition can occur in different time slots and can use the same time domain resource allocation, but different frequency domain locations are used in different BWPs depending on the frequency hopping mode. Time slot configuration 805 illustrates an example where inter-BWP frequency hopping is configured for each BWP, which may support or otherwise allow the use of different or the same frequency hopping modes in different BWPs. The frequency hopping mode can be carried in RRC signaling, DCI, etc., or otherwise transmitted.

[0177] Time slot configuration 805 may include PDCCH 810 (e.g., for granting downlink resources) transmitted in the first symbol of the first time slot and in the first BWP (e.g., BWP 1). PDCCH 810 may carry or otherwise transmit indications of downlink resources according to a resource allocation scheme (e.g., according to time slot configuration 805). During the first symbol following PDCCH 810 in the first time slot and the first BWP, the base station may transmit data by transmitting DMRS 820 (followed by a transmission of PDSCH 815). Time slot configuration 805 may optionally include PDCCH 810 transmitted in the first symbol of the second time slot and in the second BWP (e.g., BWP 2) (e.g., PDCCH 810 transmitted in the first time slot may schedule data transmission in the second time slot). When transmitted, PDCCH 810 may carry or otherwise transmit indications of downlink resources according to a resource allocation scheme (e.g., according to time slot configuration 805). During the first symbol period following PDCCH 810 in the second time slot and the second BWP, the base station can transmit data by sending DMRS 820 (followed by a repeat of PDSCH 815). Data transmission can correspond to PDSCH 815, each repeat of PDSCH 815, and DMRS 820. Data transmission can be transmitted using a subset of the available subbands in the first and second BWPs (e.g., reduced bandwidth supported by the UE type), where frequency hopping occurs for different time slots and in different BWPs. Therefore, time slot configuration 805 illustrates an example resource allocation scheme where the downlink aggregation level per hop can be based on the bundle size, at least in some respects.

[0178] In some examples, slot configuration 805 may include providing a narrowband BWP offset indication (or BWP index sequence) for inter-BWP frequency hopping. An NR light UE may be configured with more than one downlink BWP, where the total bandwidth is no greater than the maximum bandwidth supported by the UE. Slot configuration 805 may maintain the same relative resource block position within the downlink BWP after frequency hopping. In some examples, slot configuration 805 may support floating narrowband BWPs with predefined hopping patterns. For example, an NR light UE may be configured with downlink BWPs no larger than the UE's maximum supported bandwidth. The center frequency of the downlink BWP may be changed based on the frequency hopping pattern. In some examples, the time position may be the same relative to the slot boundaries of each slot.

[0179] Therefore, the UE and base station can transmit downlink grants and corresponding downlink data transmissions scheduled by the downlink grants according to the resource allocation scheme. The resource allocation scheme can correspond to time slot configuration 805.

[0180] Figure 9 An example time slot configuration set 900 supporting PDSCH resources for a UE with reduced capabilities is illustrated according to various aspects of this disclosure. In some examples, the example time slot configuration set 900 may implement aspects of wireless communication system 100 and / or example time slot configuration sets 200, 300, 400, 500, 600 and / or 800, and / or example time slot configuration 700. The aspects of the example time slot configuration set 900 may be implemented by the UE, a base station, and / or a network entity (e.g., an MME) (which may be examples of the corresponding devices described herein). Specifically, when the UE is operating in RRC connected mode, the aspects of the example time slot configuration set 900 may be implemented by the base station, and / or when the UE is operating in RRC inactive or RRC idle mode, the aspects of the example time slot configuration set 900 may be implemented in the network entity. In another example, the UE may report this capability to the network entity (e.g., to the MME via NAS signaling). The base station performs UE characteristics based on relevant information obtained from the network entity. In a broader sense, the example slot configuration set 900 illustrates two examples of slot configurations for supporting PDSCH enhancements for UE types with reduced capabilities.

[0181] As mentioned above, some wireless communication systems can utilize various frequency, time, and / or spatial diversity techniques to improve system throughput and performance. While some UE types support such diversity schemes, others may not. For example, some UE types may be associated with UEs with reduced or limited capabilities (e.g., reduced bandwidth, fewer antennas, or extended battery life). Therefore, references to UE types in this document generally refer to these reduced-capability UEs.

[0182] Therefore, the described aspects of the technology provide various mechanisms to enhance communication for such UE types (e.g., UE types with reduced capabilities). For example, the UE may send or otherwise provide a UE capability message to a base station (and / or via the base station to a network entity) that carries or otherwise transmits an indication of the UE type. As discussed, a UE type may be associated with, for example, a UE with reduced bandwidth, a reduced number of antennas, a low transmit power level, little or no mobility, enhanced power savings / extended battery life, etc. UE capability messages may be provided during initial connection (e.g., using one or more RRC signals, MAC CE, etc.) or during registration (e.g., using NAS signals to a network entity), etc.

[0183] Base stations (or network entities) can typically select a resource allocation scheme for a UE, which can be used to send downlink grants and / or data transmissions to the UE based on the UE type. In some aspects, the described techniques can support inter-slot and / or intra-slot PDSCH repetition. In some aspects, this can include per-PDSCH repetition using different frequency domain resource allocations in different time slots. Example time slot configuration set 900 illustrates two non-limiting examples of time slot configurations that can be components of such resource allocation schemes according to aspects of the described techniques.

[0184] In the first example, the selected resource allocation scheme can correspond to time slot configuration 905. Time slot configuration 905 illustrates an example where each PDSCH repetition can occur in different time slots and can use the same time domain resource allocation, but different frequency domain locations are used in different BWPs depending on the frequency hopping mode. Time slot configuration 905 illustrates an example of configuring inter-BWP frequency hopping for each BWP, which can support or otherwise allow the use of different or the same frequency hopping modes in different BWPs. Indications for the frequency hopping mode can be carried or otherwise transmitted in RRC signaling, DCI, etc. Time slot configuration 905 also illustrates an example of providing retuning gaps in the downlink. Radio frequency (RF) retuning may be due to frequency hopping (e.g., if RF retuning is required for inter-BWP frequency hopping or dual connectivity (DC) changes). Retuning gaps (e.g., guard periods) for RF retuning can be configured in two (or more) options. Time slot configuration 905 illustrates a first example where a symbol at the beginning of a time slot after frequency hopping (e.g., a symbol typically reserved for downlink control information (e.g., PDCCH)) is used as a retuning gap. In this example, a symbol typically allocated for downlink control information can be used for a retuning gap unless the control information is located along with the retuning gap region. Therefore, it may not be desirable for the UE to monitor / transmit signals during the retuning gap during frequency hopping.

[0185] Therefore, time slot configuration 905 may include a retuning gap 910 in the first symbol of the first time slot and in the first BWP (e.g., BWP 1). The UE can use the retuning gap 910 to retune to the subband on which data transmission is scheduled. After the retuning gap 910 in the first time slot and the first BWP, the base station can transmit data by transmitting PDSCH 915 in the first subband and the first BWP. Time slot configuration 905 may include a retuning gap 910 transmitted in the first symbol of the second time slot and the second BWP. During the first symbol following the retuning gap 910 in the second time slot and the second BWP (e.g., BWP 2), the base station can transmit data by transmitting repeated transmissions of PDSCH 915. Data transmission may correspond to any repeated transmissions of PDSCH 915. Data transmission may be transmitted using a subset of the available subbands in the first and second BWPs (e.g., reduced bandwidth supported by the UE type), where frequency hopping occurs for different time slots and in different BWPs.

[0186] In the second example, the resource allocation scheme can correspond to time slot configuration 920. Time slot configuration 920 illustrates an example where each PDSCH repetition can occur in different time slots and can use the same time domain resource allocation, but different frequency domain locations are used in different BWPs depending on the frequency hopping mode. Time slot configuration 920 illustrates an example of configuring inter-BWP frequency hopping for each BWP, which can support or otherwise allow the use of different or the same frequency hopping modes in different BWPs. Indications for the frequency hopping mode can be carried or otherwise transmitted in RRC signaling, DCI, etc. Time slot configuration 920 also illustrates an example of providing retuning gaps in the downlink. RF retuning gaps may be due to frequency hopping (e.g., if RF retuning is required for inter-BWP frequency hopping or DC changes). Retuning gaps (e.g., guard periods) used for RF retuning can be configured with two (or more) options. Slot configuration 920 illustrates a second example where symbols are located at the end of a slot following a frequency hopping (e.g., symbols typically reserved for uplink control information, such as PUCCH). In this example, symbols typically allocated for uplink control information can be used for retuning gaps unless the control information is positioned together with the retuning gap region. Therefore, it may not be desirable for the UE to monitor / transmit signals during the retuning gaps during frequency hopping.

[0187] Therefore, time slot configuration 920 can begin with data transmission (e.g., PDSCH 915) that first occurs in the first time slot, using the first subband, and in the first BWP. Time slot configuration 920 can include a retuning gap 910 in the first symbol of the first time slot and in the first BWP (e.g., BWP 1). The UE can use the retuning gap 910 to retune to the subband on which data transmission is scheduled in the second time slot. After the retuning gap 910 in the first time slot and the first BWP, the base station can transmit data transmission by performing repeated transmissions of PDSCH 915 in the second subband and the second BWP (e.g., BWP 2). Time slot configuration 920 can include a retuning gap 910 transmitted in the last symbol of the second time slot and the second BWP. Data transmission can correspond to PDSCH 915 and any repeated transmissions of PDSCH 915. Data transmission can be transmitted using a subset of the available subbands in the first and second BWPs (e.g., reduced bandwidth supported by the UE type), where frequency hopping occurs for different time slots and in different BWPs. Symbols at the end of a time slot that occurs before frequency hopping (e.g., symbols typically reserved for uplink control information) can be reused for retuning gap 910.

[0188] Therefore, the UE and the base station can transmit downlink grants and corresponding downlink data transmissions scheduled by the downlink grants according to the resource allocation scheme. The resource allocation scheme can correspond to one or more of time slot configurations 905 and / or 920.

[0189] Figure 10 An example set of time slot configurations 1000 supporting PDSCH resources for UEs with reduced capabilities, according to various aspects of this disclosure, is illustrated. In some examples, the example time slot configuration set 1000 may implement aspects of wireless communication system 100 and / or example time slot configuration sets 200, 300, 400, 500, 600, 800 and / or 900, and / or example time slot configuration 700. The aspects of the example time slot configuration set 1000 may be implemented by the UE, base station, and / or network entity (e.g., MME) (which may be examples of the corresponding devices described herein). Specifically, when the UE is operating in RRC connected mode, the aspects of the example time slot configuration set 1000 may be implemented by the base station, and / or when the UE is operating in RRC inactive or RRC idle mode, the aspects of the example time slot configuration set 1000 may be implemented in the network entity. More broadly, the example time slot configuration set 1000 illustrates two examples of time slot configurations for supporting PDSCH enhancements for UE types with reduced capabilities.

[0190] As mentioned above, some wireless communication systems can utilize various frequency, time, and / or spatial diversity techniques to improve system throughput and performance. While some UE types support such diversity schemes, others may not. For example, some UE types may be associated with UEs with reduced or limited capabilities (e.g., reduced bandwidth, fewer antennas, or extended battery life). Therefore, references to UE types in this document generally refer to these reduced-capability UEs.

[0191] Therefore, the described aspects of the technology provide various mechanisms to enhance communication for such UE types (e.g., UE types with reduced capabilities). For example, the UE may send or otherwise provide a UE capability message to a base station (and / or via the base station to a network entity) that carries or otherwise transmits an indication of the UE type. As discussed, a UE type may be associated with, for example, a UE with reduced bandwidth, a reduced number of antennas, a low transmit power level, little or no mobility, or enhanced power savings / extended battery life. The UE capability message may be provided during initial connection (e.g., using one or more RRC signals, MAC CE, etc.) or during registration (e.g., using NAS signals to a network entity).

[0192] Base stations (or network entities) can typically select a resource allocation scheme for a UE, which can be used to send downlink grants and / or data transmissions to the UE based on the UE type. In some aspects, the described techniques can support inter-slot and / or intra-slot PDSCH repetition. In some aspects, this can include per-PDSCH repetition using different frequency domain resource allocations in different time slots. Example time slot configuration set 1000 illustrates two non-limiting examples of time slot configurations that can be components of such resource allocation schemes according to various aspects of the described techniques.

[0193] In the first example, the resource allocation scheme can correspond to slot configuration 1005. Slot configuration 1005 illustrates an example where each PDSCH repetition can occur in different slots and can use the same or different time-domain resource allocations between slots, and can use the same or different frequency-domain positions between slots and within the same BWP, depending on the frequency hopping pattern. Slot configuration 1005 illustrates an example of configuring inter-slot repetition and inter-BWP frequency hopping for each BWP, which can support or otherwise allow the use of different or the same frequency hopping patterns in different BWPs. Indications for the frequency hopping pattern can be carried or otherwise transmitted in RRC signaling, DCI, etc. Slot configuration 1005 also illustrates an example including PDSCH repetition / aggregation and frequency hopping. A DCI can be used to schedule multi-slot PDSCH frequency hopping. Redundant version (RV) repetition can be used with a predefined order applied to the same and / or different frequency hopping. In addition to frequency hopping, an RRC-configured downlink aggregation factor for multi-slot repetition can also be used. The RV pattern can be repeated in four time slots, such as RV2, RV3, RV1 and RV0 or some other pattern.

[0194] Therefore, time slot configuration 1005 can begin with the base station transmitting PDCCH 1015 in the first symbol and first BWP (e.g., BWP 1) of the first time slot. PDCCH 1015 may carry or otherwise transmit an indication of downlink grant (e.g., DCI) for scheduled data transmission (e.g., PDSCH 1020). PDCCH 1015 can be transmitted throughout the entire BWP. The base station can then perform data transmission by transmitting PDSCH 1020 in the remaining symbols of the first time slot. In the second time slot, the base station may again transmit PDCCH 1015 in the first symbol of the second time slot, followed by a repetition of PDSCH 1020 in the remaining symbols of the second time slot and the first BWP. In the third time slot, the base station may again transmit PDCCH 1015 in the first symbol of the third time slot, followed by a repetition of PDSCH 1020 in the remaining symbols of the third time slot. In the fourth time slot, the base station can again transmit PDCCH 1015 in the first symbol of the fourth time slot, followed by a repeated transmission of PDSCH 1020 in the remaining symbols of the fourth time slot. The PDSCH 1020 transmission in each of the four time slots can use the same frequency domain resource allocation (e.g., on the same subband). That is, time slot bundling / aggregation can be used in each frequency hopping and can be repeated at the same frequency location before the hopping. In some examples, DMRS (not shown) with the same frequency domain resource allocation can be associated within each (or all) hopping. Data transmission can correspond to any repeated transmission of PDSCH 1020.

[0195] In the second example, the resource allocation scheme can correspond to slot configuration 1010. Slot configuration 1010 illustrates an example where each PDSCH repetition can occur in different slots and can use the same or different time-domain resource allocations between slots, depending on the frequency hopping mode, and using different frequency-domain locations between slots and in different BWPs. Slot configuration 1010 illustrates an example of configuring inter-slot repetition and inter-BWP frequency hopping for each BWP, which can support or otherwise allow the use of different or the same frequency hopping modes in different BWPs. Indications for the frequency hopping mode can be carried or otherwise transmitted in RRC signaling, DCI, etc. Slot configuration 1010 also illustrates an example including PDSCH repetition / aggregation and frequency hopping. A DCI can be used to schedule multi-slot PDSCH frequency hopping. RV repetition can be used with a predefined order applied to the same and / or different frequency hopping. In addition to frequency hopping, an RRC-configured downlink aggregation factor for multi-slot repetition can also be used. The RV pattern can be repeated in four time slots, such as RV2, RV3, RV1 and RV0 or some other pattern.

[0196] Therefore, time slot configuration 1010 can begin with the base station transmitting PDCCH 1015 in the first symbol and first BWP (e.g., BWP 1) of the first time slot. PDCCH 1015 may carry or otherwise transmit an indication of downlink grant (e.g., DCI) for scheduled data transmission (e.g., PDSCH 1020). PDCCH 1015 can be transmitted throughout the entire BWP. The base station can then perform data transmission by transmitting PDSCH 1020 in the remaining symbols of the first time slot and on the first subband. In the second time slot and still within the first BWP, the base station can again transmit PDCCH 1015 in the first symbol of the second time slot using the entire BWP, followed by repeated transmissions of PDSCH 1020 in the remaining symbols of the second time slot on the first subband and in the first BWP. In the third time slot, the base station can again transmit PDCCH 1015 in the first symbol of the third time slot in the second BWP and using the entire second BWP, followed by a repeated transmission of PDSCH 1020 in the remaining symbols of the third time slot in the second BWP and using the second subband. In the fourth time slot, the base station can again transmit PDCCH 1015 in the first symbol of the fourth time slot in the second BWP and using the entire BWP, followed by a repeated transmission of PDSCH 1020 in the remaining symbols of the fourth time slot in the second BWP and on the second subband. The PDSCH 1020 transmissions in each pair of time slots in the four time slots can use the same frequency domain resource allocation (e.g., on the same subband). That is, time slot bundling / aggregation can be used in each frequency hopping and can be repeated at the same frequency location before the frequency hopping. In some examples, DMRS (not shown) with the same frequency domain resource allocation can be associated within each (or all) hop. Data transmission can correspond to any repeated transmission of PDSCH 1020.

[0197] Therefore, the UE and the base station can transmit downlink grants and corresponding downlink data transmissions scheduled by the downlink grants according to the resource allocation scheme. The resource allocation scheme can correspond to one or more of time slot configurations 1005 and / or 1010.

[0198] Figure 11 A block diagram 1100 of an apparatus 1105 supporting PDSCH resources for a capability-reduced UE, according to various aspects of this disclosure, is shown. Apparatus 1105 may be an example of various aspects of a UE 115 as described herein. Apparatus 1105 may include a receiver 1110, a communications manager 1115, and a transmitter 1120. Apparatus 1105 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0199] Receiver 1110 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to PDSCH resources for a UE with reduced capability). This information can be passed to other components of device 1105. Receiver 1110 can be a reference... Figure 14 Examples of various aspects of the transceiver 1420 are described. The receiver 1110 may utilize a single antenna or an array of antennas.

[0200] The communication manager 1115 can perform the following operations: send a UE capability message to a base station, the UE capability message including an indication of a UE type, wherein the UE type is associated with at least one of a reduced bandwidth, a reduced number of antennas, or a combination thereof; based on the UE capability message, receive downlink grants for downlink resources for data transmission according to a resource allocation scheme, wherein the resource allocation scheme is associated with the UE type and a portion of the UE's supported bandwidth; monitor a radio channel based on the downlink grants; and receive data transmission based on the monitoring of the radio channel. The communication manager 1115 may be an example of various aspects of the communication manager 1410 described herein.

[0201] The communication manager 1115 or its sub-components may be implemented in hardware, processor-executable code (e.g., software), or any combination thereof. If implemented in processor-executable code, the functionality of the communication manager 1115 or its sub-components may be performed by a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described in this disclosure.

[0202] The communication manager 1115 or its subcomponents may be physically located at various locations, including being distributed such that some functions are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of this disclosure, the communication manager 1115 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of this disclosure, the communication manager 1115 or its subcomponents may be combined with one or more other hardware components, including but not limited to input / output (I / O) components, transceivers, network servers, other computing devices, one or more other components described in this disclosure, or combinations thereof.

[0203] Transmitter 1120 can transmit signals generated by other components of device 1105. In some examples, transmitter 1120 may be co-located with receiver 1110 in a transceiver module. For example, transmitter 1120 may be a reference... Figure 14Examples of various aspects of the transceiver 1420 are described. The transmitter 1120 may utilize a single antenna or an array of antennas.

[0204] Figure 12 A block diagram 1200 of an apparatus 1205 supporting PDSCH resources for a UE with reduced capabilities, according to various aspects of this disclosure, is shown. Apparatus 1205 may be an example of an apparatus 1105 as described herein or an aspect of a UE 115. Apparatus 1205 may include a receiver 1210, a communications manager 1215, and a transmitter 1235. Apparatus 1205 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0205] Receiver 1210 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to PDSCH resources for UEs with reduced capabilities). This information can be passed to other components of device 1205. Receiver 1210 can be a reference... Figure 14 Examples of various aspects of the transceiver 1420 are described. The receiver 1210 may utilize a single antenna or an array of antennas.

[0206] Communication manager 1215 may be an example of aspects of communication manager 1115 as described herein. Communication manager 1215 may include UE capability manager 1220, authorization manager 1225, and data transmission manager 1230. Communication manager 1215 may be an example of aspects of communication manager 1410 as described herein.

[0207] The UE capability manager 1220 can send UE capability messages to the base station. The UE capability messages include an indication of the UE type, wherein the UE type is associated with at least one of the following: reduced bandwidth for the UE, reduced number of antennas, or a combination thereof.

[0208] The authorization manager 1225 can receive downlink authorizations for downlink resources used for data transmission based on UE capability messages and according to a resource allocation scheme, wherein the resource allocation scheme is associated with the UE type and the UE's supported bandwidth portion; and monitor the radio channel based on the downlink authorizations.

[0209] The data transmission manager 1230 can receive data transmissions based on monitoring of the wireless channel.

[0210] Transmitter 1235 can transmit signals generated by other components of device 1205. In some examples, transmitter 1235 may be co-located with receiver 1210 in a transceiver module. For example, transmitter 1235 may be a reference... Figure 14Examples of various aspects of the transceiver 1420 are described. The transmitter 1235 may utilize a single antenna or an array of antennas.

[0211] Figure 13 A block diagram 1300 is shown of a communication manager 1305 supporting PDSCH resources for a UE with reduced capabilities, according to various aspects of this disclosure. The communication manager 1305 may be an example of aspects of the communication manager 1115, communication manager 1215, or communication manager 1410 described herein. The communication manager 1305 may include a UE capability manager 1310, an authorization manager 1315, a data transmission manager 1320, an interleaving manager 1325, a BWP manager 1330, a repeat manager 1335, a timeslot manager 1340, and a repeat / timeslot index manager 1345. Each of these modules may communicate with each other directly or indirectly (e.g., via one or more buses).

[0212] The UE capability manager 1310 can send a UE capability message to the base station. The UE capability message includes an indication of the UE type, wherein the UE type is associated with at least one of reduced bandwidth for the UE, or reduced number of antennas, or a combination thereof.

[0213] The grant manager 1315 can receive downlink grants for downlink resources used for data transmission based on UE capability messages and a resource allocation scheme, wherein the resource allocation scheme is associated with the UE type and the UE's supported bandwidth portion. In some examples, the grant manager 1315 can monitor the radio channel based on the downlink grants.

[0214] The data transmission manager 1320 can receive data transmissions based on monitoring of the wireless channel.

[0215] The interleaving manager 1325 can receive data transmissions in interleaved and discontinuous resource blocks distributed across a subset of available subbands in a BWP-supported system, the subset being based on the UE type.

[0216] The BWP Manager 1330 can receive data transmissions on BWP-enabled devices using a low encoding rate, which is based on the UE type.

[0217] In some examples, the BWP manager 1330 can identify a scaling factor for data transmission using a low coding rate based on a scaling factor for the transmit block size, the scaling factor being UE type-based. In some cases, the first DMRS transmission is transmitted during a first time period of the first part of a time slot. In some cases, the second DMRS transmission is transmitted during a second time period of the second part of a time slot, the first time period of the first part of the time slot differing from the second time period of the second part of the time slot.

[0218] The repeat manager 1335 can receive the first transmission and the repeat transmission of data transmission in a time slot.

[0219] In some examples, the repeat manager 1335 can identify the DMRS configuration for receiving a first transmission and a repeat transmission within a time slot. In some examples, the repeat manager 1335 can receive data transmissions based on the DMRS configuration. In some examples, the repeat manager 1335 can receive a first DMRS transmission during a first portion of the time slot for the first transmission and a second DMRS transmission during a second portion of the time slot for the repeat transmission. In some examples, the repeat manager 1335 can identify a first start symbol for the first transmission and a second start symbol for the repeat transmission based on a downlink aggregation factor for data repeating within the time slot.

[0220] In some examples, the repeat manager 1335 may, based on the time slot in which the first transmission and repeat transmission are received, send a feedback signal for data transmission during a subsequent time slot having a time slot for processing. In some examples, the repeat manager 1335 may receive one or more additional repeat transmissions of data transmission in a second time slot occurring after the time slot in which the first transmission and repeat transmission are received. In some examples, the repeat manager 1335 may, based on a second time slot in which one or more repeat transmissions may be received, send a feedback signal during a subsequent time slot having a time slot for processing. In some cases, the first DMRS transmission is received during the initial time period of the first portion of the time slot. In some cases, the second DMRS transmission is received during the initial time period of the second portion of the time slot. In some cases, the first DMRS transmission is received during the first time period of the first portion of the time slot used for the first transmission. In some cases, the second DMRS transmission is received during the second time period of the second portion of the time slot used for repeat transmission, the first time period of the first portion of the time slot being different from the second time period of the second portion of the time slot. In some cases, the first transmission and repeat transmission occur during the same symbol configuration or different symbol configurations within the time slot.

[0221] The time slot manager 1340 can receive a first portion of data transmission in a first time slot and on a first subband supporting the BWP. In some examples, the time slot manager 1340 can receive a second portion of data transmission in a second time slot on a second subband supporting the BWP, wherein the first subband is a different subband from the second subband. In some examples, the time slot manager 1340 can receive both the first and second portions of data transmission based on the same or different time domain configurations between the first and second time slots. In some examples, the time slot manager 1340 can determine that the first subband is in a first BWP and the second subband is in a second BWP different from the first BWP. In some examples, the time slot manager 1340 can perform a retuning operation during a retuning gap between receiving the first portion and receiving the second portion. In some examples, the time slot manager 1340 can receive the first portion in the first time slot and the second portion in the second time slot based on the RV associated with the first and second portions of data transmission.

[0222] In some cases, the first subband and the second subband are in the same BWP or in different BWPs. In some cases, the retuning gap is the last part of the first subband in the first BWP, or the first part of the second subband in the second BWP, or a combination thereof.

[0223] The repeat / slot index manager 1345 can receive data transmission based on slot indexes, repeat indexes, or a combination thereof.

[0224] Figure 14 A diagram of a system 1400 including device 1405 supporting PDSCH resources for a UE with reduced capabilities, according to various aspects of this disclosure, is shown. Device 1405 may be an example of device 1105, device 1205, or UE 115 as described herein, or a component including device 1105, device 1205, or UE 115. Device 1405 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, including a communication manager 1410, an I / O controller 1415, a transceiver 1420, an antenna 1425, a memory 1430, and a processor 1440. These components may communicate electronically via one or more buses (e.g., bus 1445).

[0225] The communication manager 1410 can perform the following operations: send a UE capability message to a base station, the UE capability message including an indication of a UE type, wherein the UE type is associated with at least one of a reduced bandwidth for the UE, or a reduced number of antennas, or a combination thereof; receive downlink grants for downlink resources for data transmission based on the UE capability message and according to a resource allocation scheme, wherein the resource allocation scheme is associated with the UE type and a portion of the UE's supported bandwidth; monitor a radio channel based on the downlink grants; and receive data transmission based on the monitoring of the radio channel.

[0226] I / O controller 1415 can manage input and output signals for device 1405. I / O controller 1415 can also manage peripheral devices not integrated into device 1405. In some cases, I / O controller 1415 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 1415 can utilize, for example... This can be an operating system such as a modem, keyboard, mouse, touchscreen, or similar device, or an interaction with such devices. In some cases, the I / O controller 1415 may be implemented as part of a processor. In some cases, a user may interact with device 1405 via the I / O controller 1415 or via hardware components controlled by the I / O controller 1415.

[0227] Transceiver 1420 can communicate bidirectionally via one or more antennas, wired or wireless links as described above. For example, transceiver 1420 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. Transceiver 1420 may also include a modem for modulating packets and providing the modulated packets to the antenna for transmission, and for demodulating packets received from the antenna.

[0228] In some cases, a wireless device may include a single antenna 1425. However, in other cases, the device may have more than one antenna 1425, which are capable of transmitting or receiving multiple wireless transmissions simultaneously.

[0229] Memory 1430 may include random access memory (RAM) and read-only memory (ROM). Memory 1430 may store computer-readable, computer-executable code 1435, which includes instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, in addition, memory 1430 may also include a basic input / output system (BIOS) that controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0230] Processor 1440 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 1440 may be configured to use a memory controller to operate a memory array. In other cases, the memory controller may be integrated into processor 1440. Processor 1440 may be configured to execute computer-readable instructions stored in memory (e.g., memory 1430) to cause device 1405 to perform various functions (e.g., functions or tasks supporting PDSCH resources for a degraded UE).

[0231] Code 1435 may include instructions for implementing various aspects of this disclosure, including instructions for supporting wireless communication. Code 1435 may be stored in a non-transitory computer-readable medium (e.g., system memory or other types of memory). In some cases, code 1435 may not be directly executable by processor 1440, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0232] Figure 15 A block diagram 1500 of an apparatus 1505 supporting PDSCH resources for a UE with reduced capabilities, according to various aspects of this disclosure, is shown. Apparatus 1505 may be an example of various aspects of base station 105 as described herein. Apparatus 1505 may include a receiver 1510, a communications manager 1515, and a transmitter 1520. Apparatus 1505 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0233] Receiver 1510 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to PDSCH resources for a degraded UE). This information can be passed to other components of device 1505. Receiver 1510 can be a reference... Figure 18 Examples of various aspects of the transceiver 1820 are described. The receiver 1510 may utilize a single antenna or an array of antennas.

[0234] The communication manager 1515 can perform the following operations: receive a UE capability message from a UE, the UE capability message including an indication of a UE type, wherein the UE type is associated with at least one of reduced bandwidth, reduced number of antennas, or a combination thereof for the UE; select a resource allocation scheme for downlink grants for the UE based on the UE capability message and a portion of the UE's supported bandwidth; send downlink grants to the UE for downlink resources for data transmission according to the resource allocation scheme; and send data transmissions to the UE based on the downlink grants. The communication manager 1515 may be an example of various aspects of the communication manager 1810 described herein.

[0235] The communication manager 1515 or its sub-components may be implemented in hardware, processor-executable code (e.g., software), or any combination thereof. If implemented in processor-executable code, the functionality of the communication manager 1515 or its sub-components may be performed by a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware component, or any combination thereof designed to perform the functions described in this disclosure.

[0236] The communication manager 1515 or its subcomponents may be physically located at various locations, including being distributed such that some functions are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of this disclosure, the communication manager 1515 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of this disclosure, the communication manager 1515 or its subcomponents may be combined with one or more other hardware components (including, but not limited to, I / O components, transceivers, network servers, other computing devices, one or more other components described in this disclosure, or combinations thereof).

[0237] Transmitter 1520 can transmit signals generated by other components of device 1505. In some examples, transmitter 1520 can be co-located with receiver 1510 in a transceiver module. For example, transmitter 1520 can be a reference... Figure 18 Examples of various aspects of the transceiver 1820 are described. The transmitter 1520 may utilize a single antenna or an array of antennas.

[0238] Figure 16A block diagram 1600 of an apparatus 1605 supporting PDSCH resources for a UE with reduced capabilities, according to various aspects of this disclosure, is shown. Apparatus 1605 may be an example of an apparatus 1505 as described herein or an aspect of a base station 105. Apparatus 1605 may include a receiver 1610, a communications manager 1615, and a transmitter 1640. Apparatus 1605 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0239] Receiver 1610 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to PDSCH resources for a UE with reduced capability). This information can be passed to other components of device 1605. Receiver 1610 can be a reference... Figure 18 Examples of various aspects of the transceiver 1820 are described. The receiver 1610 can utilize a single antenna or a set of antennas.

[0240] Communication manager 1615 may be an example of aspects of communication manager 1615 as described herein. Communication manager 1615 may include UE capability manager 1620, resource allocation scheme manager 1625, authorization manager 1630, and data transmission manager 1635. Communication manager 1615 may be an example of aspects of communication manager 1810 as described herein.

[0241] The UE capability manager 1620 can receive UE capability messages from the UE, which include an indication of the UE type, wherein the UE type is associated with at least one of reduced bandwidth, reduced number of antennas, or a combination thereof for the UE.

[0242] The resource allocation scheme manager 1625 can select a resource allocation scheme for downlink licensing for the UE based on the UE capability message and the UE's supported bandwidth portion.

[0243] The authorization manager 1630 can send downlink authorizations to the UE for downlink resources used for data transmission according to the resource allocation scheme.

[0244] The data transmission manager 1635 can send data to the UE based on downlink authorization.

[0245] Transmitter 1640 can transmit signals generated by other components of device 1605. In some examples, transmitter 1640 can be co-located with receiver 1610 in a transceiver module. For example, transmitter 1640 can be a reference... Figure 18 Examples of various aspects of the transceiver 1820 are described. The transmitter 1640 can utilize a single antenna or an array of antennas.

[0246] Figure 17 A block diagram 1700 is shown of a communication manager 1705 supporting PDSCH resources for a UE with reduced capabilities, according to various aspects of this disclosure. The communication manager 1705 may be an example of aspects of the communication manager 1515, communication manager 1615, or communication manager 1810 described herein. The communication manager 1705 may include a UE capability manager 1710, a resource allocation scheme manager 1715, an authorization manager 1720, a data transmission manager 1725, an interleaving manager 1730, a BWP manager 1735, a repeat manager 1740, a timeslot manager 1745, and a repeat / timeslot index manager 1750. Each of these modules may communicate with each other directly or indirectly (e.g., via one or more buses).

[0247] The UE capability manager 1710 can receive UE capability messages from the UE, which include an indication of the UE type, wherein the UE type is associated with at least one of reduced bandwidth, reduced number of antennas, or a combination thereof for the UE.

[0248] The Resource Allocation Scheme Manager 1715 can select a resource allocation scheme for downlink licensing for the UE based on the UE capability message and the UE's supported bandwidth portion.

[0249] The authorization manager 1720 can send downlink authorizations to the UE for downlink resources used for data transmission according to the resource allocation scheme.

[0250] The data transmission manager 1725 can send data to the UE based on downlink authorization.

[0251] The interleaving manager 1730 can send data transmissions in interleaved and discontinuous resource blocks distributed across a subset of available subbands in a BWP-supported system, the subset being based on the UE type.

[0252] BWP Manager 1735 can send data transmissions on BWP-enabled devices using a low coding rate, which is based on the UE type.

[0253] In some examples, the BWP manager 1735 can identify the scaling factor to be used for data transmission using a low coding rate based on the scaling factor of the transmit block size, which is based on the UE type.

[0254] The repeat manager 1740 can transmit a first transmission and a repeat transmission of data transmission within a time slot. In some examples, the repeat manager 1740 can identify a DMRS configuration for transmitting the first transmission and the repeat transmission within a time slot. In some examples, the repeat manager 1740 can transmit data transmission based on the DMRS configuration. In some examples, the repeat manager 1740 can transmit a first DMRS transmission during a first portion of a time slot for the first transmission and a second DMRS transmission during a second portion of a time slot for the repeat transmission. In some examples, the repeat manager 1740 can identify a first start symbol for the first transmission and a second start symbol for the repeat transmission based on a downlink aggregation factor for data repeating within a time slot. In some examples, the repeat manager 1740 can receive feedback signals for data transmission during subsequent time slots with time slots for processing, based on the time slot in which the first transmission and the repeat transmission are transmitted.

[0255] In some examples, the repeat manager 1740 may transmit one or more additional repeat transmissions of data transmission in a second time slot that occurs after the time slot in which the first transmission and repeat transmission are transmitted. In some examples, the repeat manager 1740 may receive feedback signals during subsequent time slots with time slots for processing, based on the second time slot in which one or more repeat transmissions may be transmitted. In some cases, the first DMRS transmission is transmitted during the initial time period of a first portion of the time slot for the first transmission. In some cases, the second DMRS transmission is transmitted during the initial time period of a second portion of the time slot for the repeat transmission. In some cases, the first transmission and repeat transmission occur during the same symbol configuration or different symbol configurations within the time slot.

[0256] The time slot manager 1745 can transmit a first portion of data transmission in a first time slot and on a first subband supporting the BWP. In some examples, the time slot manager 1745 can transmit a second portion of data transmission in a second time slot on a second subband supporting the BWP, wherein the first subband is a different subband from the second subband. In some examples, the time slot manager 1745 can transmit the first and second portions of data transmission based on the same or different time domain configurations between the first and second time slots. In some examples, the time slot manager 1745 can determine that the first subband is in the first BWP and the second subband is in a second BWP different from the first BWP. In some examples, the time slot manager 1745 can retune the time slot configuration between transmitting the first portion and receiving the second portion. In some examples, the time slot manager 1745 can transmit the first portion in the first time slot and the second portion in the second time slot based on the RV associated with the first and second portions of data transmission.

[0257] In some cases, the first subband and the second subband are in the same BWP or in different BWPs. In some cases, the retuning gap includes the last portion of the first subband in the first BWP, or the first portion of the second subband in the second BWP, or a combination thereof.

[0258] The repeat / slot index manager 1750 can send data transmissions based on slot indexes, repeat indexes, or a combination thereof.

[0259] Figure 18 A diagram of a system 1800 including device 1805 supporting PDSCH resources for a UE with reduced capability, according to various aspects of this disclosure, is shown. Device 1805 may be an example of device 1505, device 1605, or base station 105 as described herein, or a component including device 1505, device 1605, or base station 105. Device 1805 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, including a communication manager 1810, a network communication manager 1815, a transceiver 1820, an antenna 1825, a memory 1830, a processor 1840, and an inter-station communication manager 1845. These components may communicate electronically via one or more buses (e.g., bus 1850).

[0260] The communication manager 1810 can perform the following operations: receive a UE capability message from the UE, the UE capability message including an indication of the UE type, wherein the UE type is associated with at least one of reduced bandwidth, reduced number of antennas, or a combination thereof for the UE; select a resource allocation scheme for downlink grants for the UE based on the UE capability message and a portion of the UE's supported bandwidth; send downlink grants to the UE for downlink resources for data transmission according to the resource allocation scheme; and send data transmissions to the UE based on the downlink grants.

[0261] The network communication manager 1815 can manage communication with the core network (e.g., via one or more wired backhaul links). For example, the network communication manager 1815 can manage the transmission of data communication to client devices (e.g., one or more UEs 115).

[0262] Transceiver 1820 can communicate bidirectionally via one or more antennas, wired or wireless links as described above. For example, transceiver 1820 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. Transceiver 1820 may also include a modem for modulating packets and providing the modulated packets to the antenna for transmission, and demodulating packets received from the antenna.

[0263] In some cases, a wireless device may include a single antenna 1825. However, in other cases, the device may have more than one antenna 1825, which are capable of transmitting or receiving multiple wireless transmissions simultaneously.

[0264] Memory 1830 may include RAM, ROM, or a combination thereof. Memory 1830 may store computer-readable code 1835, which includes instructions that, when executed by a processor (e.g., processor 1840), cause device 1805 to perform the various functions described herein. In some cases, in addition to this, memory 1830 may also contain a BIOS, which controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0265] Processor 1840 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 1840 may be configured to use a memory controller to operate a memory array. In some cases, the memory controller may be integrated into processor 1840. Processor 1840 may be configured to execute computer-readable instructions stored in memory (e.g., memory 1830) to cause device 1805 to perform various functions (e.g., functions or tasks supporting PDSCH resources for a degraded UE).

[0266] Inter-site communication manager 1845 can manage communication with other base stations 105 and may include a controller or scheduler for cooperating with other base stations 105 to control communication with UE 115. For example, inter-site communication manager 1845 can coordinate the scheduling of transmissions to UE 115 to implement various interference mitigation techniques such as beamforming or joint transmission. In some examples, inter-site communication manager 1845 may provide an X2 interface within LTE / LTE-A wireless communication network technology to facilitate communication between base stations 105.

[0267] Code 1835 may include instructions for implementing various aspects of this disclosure, including instructions for supporting wireless communication. Code 1835 may be stored in a non-transitory computer-readable medium (e.g., system memory or other types of memory). In some cases, code 1835 may not be directly executable by processor 1840, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0268] Figure 19A flowchart illustrating a method 1900 for supporting PDSCH resources for a UE with reduced capabilities, according to various aspects of this disclosure, is shown. Operation of method 1900 can be implemented by a UE 115 or its components as described herein. For example, operation of method 1900 can be implemented by, as referred to... Figures 11 to 14 The communication manager described below is used for execution. In some examples, the UE can execute a set of instructions to control the UE's functional units to perform the functions described below. Alternatively, the UE can use dedicated hardware to perform aspects of the functions described below.

[0269] At point 1905, the UE may send a UE capability message to the base station. This message includes an indication of the UE type, wherein the UE type is associated with at least one of reduced bandwidth, reduced antenna quantity, or a combination thereof for the UE. Operation at point 1905 can be performed according to the methods described herein. In some examples, aspects of operation at point 1905 may be determined by reference to... Figures 11 to 14 The UE capability manager is described and executed.

[0270] At point 1910, the UE can receive downlink grants for downlink resources used for data transmission based on the UE capability message and according to a resource allocation scheme, wherein the resource allocation scheme is associated with the UE type and the UE's supported bandwidth portion. The operation at point 1910 can be performed according to the method described herein. In some examples, aspects of the operation at point 1910 can be derived from, as referenced... Figures 11 to 14 The described license manager is used to execute this.

[0271] At point 1915, the UE can monitor the radio channel based on downlink grant. Operation at point 1915 can be performed according to the methods described herein. In some examples, aspects of operation at point 1915 can be derived as described in reference... Figures 11 to 14 The described license manager is used to execute this.

[0272] At point 1920, the UE can receive data transmission based on monitoring of the radio channel. Operation at point 1920 can be performed according to the method described herein. In some examples, aspects of operation at point 1920 can be determined by referring to... Figures 11 to 14 The data transfer manager described is used to execute this.

[0273] Figure 20 A flowchart illustrating a method 2000 for supporting PDSCH resources for a UE with reduced capabilities, according to various aspects of this disclosure, is shown. Operation of method 2000 can be implemented by a UE 115 or its components as described herein. For example, operation of method 2000 can be implemented by, as referred to... Figures 11 to 14The communication manager described below is used for execution. In some examples, the UE can execute a set of instructions to control the UE's functional units to perform the functions described below. Alternatively, the UE can use dedicated hardware to perform aspects of the functions described below.

[0274] In 2005, the UE can send a UE capability message to the base station. The UE capability message includes an indication of the UE type, wherein the UE type is associated with at least one of reduced bandwidth, reduced number of antennas, or a combination thereof for the UE. Operation of 2005 can be performed according to the methods described herein. In some examples, aspects of the operation of 2005 can be determined by referring to... Figures 11 to 14 The UE capability manager is described and executed.

[0275] At 2010, the UE can receive downlink grants for downlink resources used for data transmission based on UE capability messages and according to a resource allocation scheme, where the resource allocation scheme is associated with the UE type and the UE's supported bandwidth portion. The operation of 2010 can be performed according to the method described herein. In some examples, aspects of the operation of 2010 can be determined by referring to... Figures 11 to 14 The described license manager is used to execute this.

[0276] In 2015, the UE can monitor the radio channel based on downlink grant. Operation 2015 can be performed according to the methods described herein. In some examples, aspects of operation 2015 can be derived from, as referenced... Figures 11 to 14 The described license manager is used to execute this.

[0277] In 2020, the UE can receive data transmission based on monitoring of the radio channel. Operation 2020 can be performed according to the methods described herein. In some examples, aspects of operation 2020 can be determined by referring to... Figures 11 to 14 The data transfer manager described is used to execute this.

[0278] At 2025, the UE can receive data transmissions across interleaved and discontinuous resource blocks distributed across a subset of available subbands supporting BWP, based on the UE type. Operations at 2025 can be performed according to the methods described herein. In some examples, aspects of the 2025 operation can be defined as follows: Figures 11 to 14 The described interleaving manager is used to perform this.

[0279] Figure 21 A flowchart illustrating a method 2100 for supporting PDSCH resources for a UE with reduced capabilities, according to various aspects of this disclosure, is shown. Operation of method 2100 can be implemented by a base station 105 or its components as described herein. For example, operation of method 2100 can be implemented by, as referred to... Figures 15 to 18The communication manager described below is used to execute this. In some examples, the base station may execute a set of instructions to control the functional units of the base station to perform the functions described below. Alternatively, the base station may use dedicated hardware to perform aspects of the functions described below.

[0280] At 2105, the base station can receive a UE capability message from the UE, the UE capability message including an indication of the UE type, wherein the UE type is associated with at least one of reduced bandwidth, reduced number of antennas, or a combination thereof for the UE. Operation 2105 can be performed according to the methods described herein. In some examples, aspects of the operation of 2105 can be determined by referring to... Figures 15 to 18 The UE capability manager is described and executed.

[0281] At point 2110, the base station can select a resource allocation scheme for downlink licensing for the UE based on the UE capability message and the UE's supported bandwidth portion. The operation at point 2110 can be performed according to the method described herein. In some examples, aspects of the operation at point 2110 can be derived from, as referenced... Figures 15 to 18 The resource allocation scheme manager is described and executed.

[0282] At point 2115, the base station can send downlink grants to the UE for downlink resources used for data transmission, based on a resource allocation scheme. The operation at 2115 can be performed according to the method described herein. In some examples, aspects of the operation at 2115 can be derived from, as referenced... Figures 15 to 18 The described license manager is used to execute this.

[0283] At point 2120, the base station can transmit data to the UE based on downlink grant. The operation at point 2120 can be performed according to the method described herein. In some examples, aspects of the operation at point 2120 can be derived as described in reference... Figures 15 to 18 The data transfer manager described is used to execute this.

[0284] Figure 22 A flowchart illustrating a method 2200 for supporting PDSCH resources for a UE with reduced capabilities, according to various aspects of this disclosure, is shown. Operation of method 2200 can be implemented by a base station 105 or its components as described herein. For example, operation of method 2200 can be implemented by, as referred to... Figures 15 to 18 The communication manager described below is used to execute this. In some examples, the base station may execute a set of instructions to control the functional units of the base station to perform the functions described below. Alternatively, the base station may use dedicated hardware to perform aspects of the functions described below.

[0285] At 2205, the base station can receive a UE capability message from the UE, which includes an indication of the UE type, wherein the UE type is associated with at least one of reduced bandwidth, reduced number of antennas, or a combination thereof for the UE. Operation 2205 can be performed according to the methods described herein. In some examples, aspects of the operation of 2205 can be determined by referring to... Figures 15 to 18 The UE capability manager is described and executed.

[0286] At 2210, the base station can select a resource allocation scheme for downlink licensing for the UE based on the UE capability message and the UE's supported bandwidth portion. The operation at 2210 can be performed according to the method described herein. In some examples, aspects of the operation at 2210 can be derived from, as referenced... Figures 15 to 18 The resource allocation scheme manager is described and executed.

[0287] At point 2215, the base station can send downlink grants to the UE for downlink resources used for data transmission, based on a resource allocation scheme. The operation at point 2215 can be performed according to the method described herein. In some examples, aspects of the operation at point 2215 can be derived from, as referenced... Figures 15 to 18 The described license manager is used to execute this.

[0288] At 2220, the base station can send data to the UE based on downlink grant. The operation at 2220 can be performed according to the method described herein. In some examples, aspects of the operation at 2220 can be derived as described in reference... Figures 15 to 18 The data transfer manager described is used to execute this.

[0289] At 2225, the base station can transmit data using a low coding rate on BWP support, the low coding rate being based on the UE type. Operation 2225 can be performed according to the methods described herein. In some examples, aspects of operation 2225 can be derived from, as referenced... Figures 15 to 18 The described BWP manager is used to execute this.

[0290] It should be noted that the methods described in this paper describe possible implementations, and the operations and steps can be rearranged or otherwise modified, and other implementations are possible. Furthermore, aspects from two or more methods can be combined.

[0291] The techniques described in this article can be used in various wireless communication systems, such as 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), and other systems. CDMA systems can implement radio technologies such as CDMA 2000 or Universal Terrestrial Radio Access (UTRA). CDMA2000 encompasses the IS-2000, IS-95, and IS-856 standards. Versions of IS-2000 are often referred to as CDMA2000 1X or 1X. IS-856 (TIA-856) is often referred to as CDMA2000 1xEV-DO or High Speed ​​Packet Data (HRPD). UTRA includes Wideband CDMA (W-CDMA) and other variants of CDMA. TDMA systems can implement radio technologies such as Global System for Mobile Communications (GSM).

[0292] OFDMA systems can implement radio technologies such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, or Flash-OFDM. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE, LTE-A, and LTE-A Pro are versions of UMTS using E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-A Pro, NR, and GSM are described in documents from an organization called the 3rd Generation Partnership Project (3GPP). CDMA2000 and UMB are described in documents from an organization called the 3rd Generation Partnership Project 2 (3GPP2). The technologies described herein can be used in the systems and radio technologies mentioned herein, as well as other systems and radio technologies. While various aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for illustrative purposes, and the terms LTE, LTE-A, LTE-A Pro, or NR may be used in most of the description, the techniques described herein are applicable to applications beyond LTE, LTE-A, LTE-A Pro, or NR.

[0293] Macro cells typically cover a relatively large geographic area (e.g., a radius of several kilometers) and allow unrestricted access by UEs with service subscriptions to a network provider. In contrast, small cells can be associated with lower-power base stations and can operate in the same or different (e.g., licensed or unlicensed) frequency bands as macro cells. Depending on the examples, small cells can include picocells, femtocells, and microcells. For example, a picocell can cover a small geographic area and allow unrestricted access by UEs with service subscriptions to a network provider. A femtocell can also cover a small geographic area (e.g., a residential area) and provide restricted access by UEs associated with that femtocell (e.g., UEs in a Closed Subscriber Group (CSG), UEs for users in a residential area, etc.). The base station used for a macro cell can be referred to as a macro base station (e.g., a macro eNB or macro gNB). Base stations used for small cells can be referred to as small base stations (e.g., small cell eNB or small cell gNB), pico base stations (e.g., pico eNB or pico gNB), femto base stations (e.g., femto eNB or femto gNB), or femto base stations (e.g., femto eNB or femto gNB). A base station can support one or more (e.g., two, three, four, etc.) cells, and can also support communication using one or more component carriers.

[0294] The wireless communication systems described herein can support synchronous or asynchronous operation. For synchronous operation, base stations can have similar frame timings, and transmissions from different base stations can be approximately aligned in time. For asynchronous operation, base stations can have different frame timings, and transmissions from different base stations may not be aligned in time. The techniques described herein can be used for both synchronous and asynchronous operation.

[0295] The information and signals described herein can be represented using any of a variety of different techniques and methods. For example, the data, instructions, commands, information, signals, bits, symbols, and chips mentioned throughout the description may be represented by voltage, current, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

[0296] The various illustrative blocks and modules described in connection with this disclosure can be implemented or executed using a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic device, discrete gate or transistor logic, discrete hardware component, or any combination thereof designed to perform the functions described herein. The general-purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration).

[0297] The functionality described herein can be implemented in hardware, software executed by a processor, or any combination thereof. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, software should be broadly interpreted as instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc. If implemented in software executed by a processor, the functionality can be stored as one or more instructions or code on or transmitted through a computer-readable medium. Other examples and implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functionality described herein can be implemented using software executed by a processor, hardware, hardwired, or any combination of these. Features implementing the functionality can also be physically located in various places, including being distributed such that different parts of the functionality are implemented in different physical locations.

[0298] Computer-readable media includes both non-transitory computer storage media and communication media, with communication media encompassing any medium that facilitates the transfer of computer programs from one place to another. Non-transitory storage media can be any available medium accessible by a general-purpose computer or a special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compressed optical disc (CD) ROM or other optical disc storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium capable of carrying or storing desired units of program code in the form of instructions or data structures, and accessible by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Furthermore, any connection is appropriately referred to as computer-readable media. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included within the definition of media. As used herein, disks and optical discs include CDs, laser discs, optical discs, digital multifunction discs (DVDs), floppy disks, and Blu-ray discs. Disks typically copy data magnetically, while optical discs use lasers to copy data optically. The combinations described above are also included within the scope of computer-readable media.

[0299] As used herein (including in the claims), the word "or" in a list of items (e.g., a list of items ending with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, such that a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Furthermore, as used herein, the phrase "based on" should not be construed as a reference to a closed set of conditions. For example, an exemplary step described as "based on condition A" may be based on both condition A and condition B without departing from the scope of this disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "at least partially based on". As used herein, the term "and / or" when used in a list having two or more items means that any one of the listed items may be used alone, or any combination of two or more of the listed items may be used. For example, if a composition is described as containing components A, B, and / or C, then the composition may contain: only A; only B; only C; a combination of A and B; a combination of A and C; a combination of B and C; or a combination of A, B, and C.

[0300] In the accompanying drawings, similar components or features may have the same reference numerals. Furthermore, various components of the same type can be distinguished by a dash followed by a second reference numeral, used to differentiate between similar components. If only the first reference numeral is used in the specification, the description applies to any one of the similar components having the same first reference numeral, without regard to the second reference numeral or other subsequent reference numerals.

[0301] This document describes exemplary configurations with reference to the accompanying drawings, but does not represent all examples that can be implemented or that are within the scope of the claims. The term "exemplary" as used herein means "serving as an example, instance, or illustration," not "preferred" or "advantageous over other examples." Detailed descriptions include specific details for the purpose of providing an understanding of the described techniques. However, these techniques may be implemented without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0302] The description herein is provided to enable those skilled in the art to implement or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the scope of the disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but is to be given the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a user equipment (UE), comprising: Send a UE capability message to the base station, the UE capability message including an indication of a UE type, wherein the UE type is associated with at least one of reduced bandwidth, or reduced number of antennas, or a combination thereof for the UE; At least in part based on the UE capability message, downlink grants for downlink resources used for data transmission are received according to a resource allocation scheme, wherein the resource allocation scheme is associated with the UE type and the UE's supported bandwidth portion; Monitoring the wireless channel is based at least in part on the downlink grant; and The data transmission is received at least in part based on the monitoring of the wireless channel.

2. The method according to claim 1, wherein, Receiving the data transmission includes: The data transmission is received in interleaved and discontinuous resource blocks on a subset of available subbands distributed in the supported bandwidth portion, the subset being at least partially based on the UE type.

3. The method according to claim 1, wherein, Receiving the data transmission includes: The data transmission is received on the supported bandwidth portion using a low coding rate, which is at least partially based on the UE type.

4. A method for wireless communication at a base station, comprising: Receive a UE capability message from a user equipment (UE), the UE capability message including an indication of a UE type, wherein the UE type is associated with at least one of a reduced bandwidth, a reduced number of antennas, or a combination thereof for the UE; The resource allocation scheme for downlink licensing for the UE is selected based at least in part on the UE capability message and the UE's supported bandwidth portion; According to the resource allocation scheme, the downlink grant for downlink resources used for data transmission is sent to the UE; and The data transmission is sent to the UE based at least in part on the downlink authorization.

5. The method according to claim 4, wherein, Sending the data transmission includes: The data transmission is carried out on the supported bandwidth portion and using a low coding rate, the low coding rate being at least partially based on the UE type.

6. The method according to claim 5, further comprising: The scaling factor to be used for the data transmission using the low coding rate is identified at least in part based on a scaling factor of the transmit block size, the scaling factor being at least in part based on the UE type.

7. An apparatus for wireless communication at a user equipment (UE), comprising: Memory; as well as One or more processors coupled to the memory, the one or more processors being configured to perform the method according to any one of claims 1-3.

8. An apparatus for wireless communication at a base station, comprising: Memory; as well as One or more processors coupled to the memory, the one or more processors being configured to perform the method according to any one of claims 4-6.

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