Multiplexed communication for user equipment supporting different transmission time interval lengths

Abstract

In some aspects, a user equipment (UE) may receive first downlink control information (DCI) that schedules the start of a data communication in a first transmission time interval (TTI) on a first frequency band, where the first frequency band is configured with an uplink / downlink time division duplex (TDD) pattern synchronized with a second frequency band. The UE may receive or transmit a first portion of the data communication in the first TTI at least in part based on receiving the first DCI. The UE may receive second DCI that schedules a second portion of the data communication in a second TTI on the first frequency band, where the second DCI indicates that the second portion is part of the data communication. The UE may receive or transmit the second portion of the data communication in the second TTI at least in part based on receiving the second DCI.

Description

[0001] Claims priority under 35 U.S.C. § 119

[0002] This patent application claims priority to U.S. Non-Provisional Application No. 16 / 436,618, filed on June 10, 2019, entitled "MULTIPLEXING COMMUNICATIONS OF USER EQUIPMENT THAT SUPPORT DIFFERENT TRANSMISSION TIME INTERVAL LENGTHS", which is assigned to the assignee hereof and is hereby incorporated by reference in its entirety. Field of the Disclosure

[0003] Aspects of the present disclosure generally relate to wireless communications and relate to techniques and apparatus for multiplexing communications of user equipment that support different transmission time interval lengths. Background of the Disclosure

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. A typical wireless communication system may employ a multiple access technology that is capable of supporting communication with multiple users by sharing available system resources such as bandwidth, transmit power, and / or the like. Examples of such multiple access technologies include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single-Carrier Frequency Division Multiple Access (SC-FDMA) systems, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / LTE-Advanced is an enhanced set of mobile standards for the Universal Mobile Telecommunications System (UMTS) promulgated by the 3rd Generation Partnership Project (3GPP).

[0005] A wireless communication network may include multiple base stations (BSs) capable of supporting communication with multiple user equipments (UEs). A user equipment (UE) may communicate with a base station (BS) via a downlink and an uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, access point (AP), radio head, transmit receive point (TRP), New Radio (NR) BS, 5G Node B, and / or the like.

[0006] The above multi-access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user devices to communicate at the municipal, national, regional, or even global level. New Radio (NR), also known as 5G, is an enhanced set of the LTE mobile standard promulgated by the 3rd Generation Partnership Project (3GPP). NR aims to better support mobile broadband Internet access by improving spectral efficiency, reducing costs, enhancing services, leveraging new spectrums, and better integrating with other open standards. These open standards use Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) (CP-OFDM) on the downlink (DL), CP-OFDM and / or Single Carrier - Frequency Division Multiplexing (SC-FDM) (e.g., also known as Discrete Fourier Transform Spread OFDM (DFT-s-OFDM)) on the uplink (UL), and support beamforming, Multiple Input Multiple Output (MIMO) antenna technology, and carrier aggregation. However, with the continuous growth of the demand for mobile broadband access, the LTE and NR technologies still need further improvement. Preferably, these improvements should be applicable to other multi-access technologies and the telecommunication standards that adopt these technologies. Summary of the Invention

[0007] In some aspects, a wireless communication method performed by a UE includes: receiving first Downlink Control Information (DCI), the first DCI scheduling the start of data communication in a first Transmission Time Interval (TTI) on a first frequency band, wherein the first frequency band is configured with an uplink / downlink Time Division Duplex (TDD) pattern synchronized with a second frequency band; receiving or transmitting a first portion of the data communication in the first TTI at least in part based on receiving the first DCI; receiving second DCI, the second DCI scheduling a second portion of the data communication in a second TTI on the first frequency band, wherein the second DCI indicates that the second portion is part of the data communication; and receiving or transmitting the second portion of the data communication in the second TTI at least in part based on receiving the second DCI.

[0008] In some aspects, a wireless communication method performed by a base station includes: configuring a set of transmission time intervals (TTIs) on a first frequency band with an uplink / downlink TDD pattern, the pattern being synchronized with an overlapping set of TTIs on a second frequency band, where the first frequency band is for a first type of UE that cannot communicate using shortened TTIs, and the second frequency band is for a second type of UE that can communicate using shortened TTIs; transmitting a first DCI that schedules the start of data communication in a first TTI of the first set of TTIs; receiving or transmitting a first portion of the data communication in the first TTI at least partially based on transmitting the first DCI; transmitting a second DCI that schedules a second portion of the data communication in a second TTI of the first set of TTIs, where the second DCI indicates that the second portion is part of the data communication; and receiving or transmitting the second portion of the data communication in the second TTI at least partially based on transmitting the second DCI.

[0009] In some aspects, a UE for wireless communication can include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors can be configured to: receive a first DCI that schedules the start of data communication in a first TTI on a first frequency band, where the first frequency band is configured with an uplink / downlink TDD pattern synchronized with a second frequency band; receive or transmit a first portion of the data communication in the first TTI at least partially based on receiving the first DCI; receive a second DCI that schedules a second portion of the data communication in a second TTI on the first frequency band, where the second DCI indicates that the second portion is part of the data communication; and receive or transmit the second portion of the data communication in the second TTI at least partially based on receiving the second DCI.

[0010] In some aspects, a base station for wireless communication can include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors can be configured to: configure a set of TTIs on a first frequency band with an uplink / downlink TDD pattern, the pattern being synchronized with an overlapping set of TTIs on a second frequency band, where the first frequency band is for a first type of UE that cannot communicate using shortened TTIs, and the second frequency band is for a second type of UE that can communicate using shortened TTIs; transmit a first DCI that schedules the start of data communication in a first TTI of the first set of TTIs; receive or transmit a first portion of the data communication in the first TTI at least partially based on transmitting the first DCI; transmit a second DCI that schedules a second portion of the data communication in a second TTI of the first set of TTIs, where the second DCI indicates that the second portion is part of the data communication; and receive or transmit the second portion of the data communication in the second TTI at least partially based on transmitting the second DCI.

[0011] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a UE, the one or more instructions may cause the one or more processors to: receive a first DCI that schedules the start of a data communication in a first TTI on a first frequency band, where the first frequency band is configured with an uplink / downlink TDD pattern synchronized with a second frequency band; receive or transmit a first portion of the data communication in the first TTI at least in part based on receiving the first DCI; receive a second DCI that schedules a second portion of the data communication in a second TTI on the first frequency band, where the second DCI indicates that the second portion is part of the data communication; and receive or transmit the second portion of the data communication in the second TTI at least in part based on receiving the second DCI.

[0012] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a base station, the one or more instructions may cause the one or more processors to: configure a set of TTIs on a first frequency band with an uplink / downlink TDD pattern that is synchronized with an overlapping set of TTIs on a second frequency band, where the first frequency band is for a first type of UE that is not capable of communicating using shortened TTIs and the second frequency band is for a second type of UE that is capable of communicating using shortened TTIs; transmit a first DCI that schedules the start of a data communication in a first TTI of the first set of TTIs; receive or transmit a first portion of the data communication in the first TTI at least in part based on transmitting the first DCI; transmit a second DCI that schedules a second portion of the data communication in a second TTI of the first set of TTIs, where the second DCI indicates that the second portion is part of the data communication; and receive or transmit the second portion of the data communication in the second TTI at least in part based on transmitting the second DCI.

[0013] In some aspects, an apparatus for wireless communication may include: means for receiving a first DCI that schedules the start of a data communication in a first TTI on a first frequency band, where the first frequency band is configured with an uplink / downlink TDD pattern synchronized with a second frequency band; means for receiving or transmitting a first portion of the data communication in the first TTI at least in part based on receiving the first DCI; means for receiving a second DCI that schedules a second portion of the data communication in a second TTI on the first frequency band, where the second DCI indicates that the second portion is part of the data communication; and means for receiving or transmitting the second portion of the data communication in the second TTI at least in part based on receiving the second DCI.

[0014] In some aspects, an apparatus for wireless communication can include: components for configuring a set of TTIs on a first frequency band in an uplink / downlink TDD pattern, the pattern being synchronized with an overlapping set of TTIs on a second frequency band, where the first frequency band is for a first type of UE that cannot communicate using shortened TTIs, and the second frequency band is for a second type of UE that can communicate using shortened TTIs; components for transmitting a first DCI that schedules the start of data communication in a first TTI of the first set of TTIs; components for receiving or transmitting a first portion of the data communication in the first TTI based at least in part on transmitting the first DCI; components for transmitting a second DCI that schedules a second portion of the data communication in a second TTI of the first set of TTIs, where the second DCI indicates that the second portion is part of the data communication; and components for receiving or transmitting the second portion of the data communication in the second TTI based at least in part on transmitting the second DCI.

[0015] Aspects generally include methods, apparatuses, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems, as fully described and illustrated in the present disclosure with reference to the accompanying drawings and the specification.

[0016] The foregoing has outlined rather broadly the features and technical advantages of examples in accordance with the present disclosure so that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. When considered in conjunction with the accompanying drawings, the characteristics (both their organization and method of operation) of the concepts disclosed herein, as well as the associated advantages, will be better understood from the following description. Each of the drawings provided herein is for the purpose of illustration and description only and is not to be construed as a definition of the limits of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To enable a more particular understanding of the above-described features of the present disclosure, a more specific description of the above brief overview may be obtained by reference to the various aspects, some of which are illustrated in the drawings. It should be noted, however, that the drawings only illustrate certain typical aspects of the present disclosure and should not be considered as limiting its scope, as the description may admit other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0018] Figure 1 is a block diagram conceptually illustrating an example of a wireless communication network in accordance with various aspects of the present disclosure.

[0019] Figure 2FIG. 0 is a block diagram conceptually illustrating an example of a base station communicating with a UE in a wireless communication network in accordance with various aspects of the present disclosure.

[0020] Figure 3 FIG. 4 is a diagram illustrating examples of different transmission time interval lengths for different frequency bands in accordance with various aspects of the present disclosure.

[0021] Figure 4 and Figure 5 FIG. 10 is a diagram illustrating an example of multiplexed communication of a user equipment (UE) supporting different transmission time interval lengths in accordance with various aspects of the present disclosure.

[0022] Figure 6 and 7 FIG. 16 is a diagram illustrating an example process related to multiplexed communication with a UE supporting different transmission time interval lengths in accordance with various aspects of the present disclosure. DETAILED DESCRIPTION

[0023] Aspects of the present disclosure are described more fully hereinafter with reference to the accompanying drawings. However, the present disclosure may be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art should appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of the present disclosure. For example, any number of the aspects set forth herein may be used to implement an apparatus or practice a method. Additionally, the scope of the present disclosure is intended to cover such an apparatus or method that practices using other structures, functions, or a combination of structures and functions in addition to or outside of the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein may be embodied by one or more elements of a claim.

[0024] Certain aspects of a telecommunications system will now be presented with reference to various apparatuses and techniques. These apparatuses and techniques will be described in detail below and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, and / or the like (collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination thereof. Implementing these elements as hardware or software depends upon the particular application and design constraints imposed on the overall system.

[0025] Note that although terms typically associated with 3G and / or 4G wireless technologies may be used herein to describe aspects, aspects of the present disclosure may be applied to other generation-based communication systems such as 5G and later, including NR technology.

[0026] Figure 1 FIG. 1 is a diagram illustrating a wireless network 100 in which aspects of the present disclosure may be practiced. The wireless network 100 may be an LTE network or some other wireless network, such as a 5G or NR network. The wireless network 100 may include a plurality of BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A BS is an entity that communicates with user equipment (UE), and may also be referred to as a base station, NR BS, Node B, gNB, 5G Node B (NB), access point, transmit receive point (TRP), and / or the like. Each BS may provide communication coverage for a specific geographic area. In 3GPP, depending on the context in which the term is used, the term "cell" may refer to the coverage area of the BS and / or BS subsystem serving that coverage area.

[0027] The BS may provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. A macro cell may cover a relatively large geographic area (e.g., with a radius of several kilometers) and may allow unrestricted access by UEs having a service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs having a service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 the example shown, BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. One BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "Node B", "5G NB", and "cell" may be used interchangeably herein.

[0028] In some aspects, a cell is not necessarily fixed, and the geographic area of a cell may move according to the location of a mobile BS. In some aspects, BSs may be interconnected with each other and / or with one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces (e.g., direct physical connections, virtual networks, and / or similar interfaces using any suitable transport network).

[0029] The wireless network 100 may also include relay stations. A relay station is an entity that can receive data transmissions from an upstream station (such as a BS or a UE) and send the data transmissions to a downstream station (such as a UE or a BS). A relay station can also be a UE that is capable of relaying transmissions for other UEs. In Figure 1 the example shown, the relay station 110d can communicate with the macro BS 110a and the UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay station may also be referred to as a relay BS, relay base station, relay, and / or the like.

[0030] The wireless network 100 may be a heterogeneous network that includes different types of BSs, such as macro BSs, pico BSs, femto BSs, relay BSs, and / or the like. These different types of BSs may have different transmission power levels, different coverage areas, and different impacts on interference in the wireless network 100. For example, a macro BS may have a relatively high transmission power level (e.g., 5 to 40 watts), while pico BSs, femto BSs, and relay BSs may have relatively low transmission power levels (e.g., 0.1 to 2 watts).

[0031] The network controller 130 may be coupled to a set of BSs and may provide coordination and control for these BSs. The network controller 130 may communicate with the BSs via a backhaul. The BSs may also communicate with each other directly or indirectly, for example, via a wireless or wired backhaul.

[0032] The UEs 120 (such as 120a, 120b, 120c) may be dispersed throughout the wireless network 100, and each UE may be fixed or mobile. A UE may also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, and / or the like. A UE may be a cellular phone (such as a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a portable computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smart book, a superbook, a medical device or equipment, a biosensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (such as a smart ring, smart bracelet)), an entertainment device (such as a music or video device or satellite radio), a vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0033] Some UEs can be considered as Machine Type Communication (MTC) or evolved or enhanced Machine Type Communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, and / or the like that can communicate with a base station, another device (such as a remote device), or some other entity. A wireless node can provide a connection to or from a network (e.g., a wide area network such as the Internet or a cellular network) via a wired or wireless communication link, for example. Some UEs can be considered Internet of Things (IoT) devices, and / or can be implemented as NarrowBand IoT (NB-IoT) devices. Some UEs can be considered Customer Premises Equipment (CPE). UE 120 can be included inside a housing that houses components of UE 120 (such as a processor component, a memory component, and / or the like).

[0034] Generally, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific Radio Access Technology (RAT) and can operate on one or more frequencies. A RAT can also be referred to as a radio technology, an air interface, and / or the like. A frequency can also be referred to as a carrier, a channel, and / or the like. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks of different RATs. In some cases, an NR or 5G RAT network can be deployed.

[0035] In some aspects, two or more UEs 120 (such as shown as UE 120a and UE 120e) can communicate directly using one or more sidelink channels (e.g., without using the base station 110 as an intermediary to communicate with each other). For example, UEs 120 can communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which can include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, and / or the like), mesh networks, and / or the like. In such cases, UEs 120 can perform scheduling operations, resource selection operations, and / or other operations performed by the base station 110 described elsewhere herein.

[0036] In some aspects, the base station 110 can serve different UEs 120 of different categories, different UEs 120 with different capabilities, and / or the like. For example, the base station 110 can serve a first UE 120f with less advanced capabilities (e.g., lower capabilities) and a second UE 120g with more advanced capabilities (e.g., higher capabilities). For example, the first UE 120f can be a first type of UE 120 (e.g., NR-Lite UE) that is not capable of communicating using shortened transmission time intervals (TTIs) (e.g., 1 ms or shorter, 0.5 ms, 0.25 ms, 0.125 ms, 0.0625 ms, and / or similar time slot lengths depending on the subcarrier spacing), and the second UE 120g can be a second type of UE 120 (e.g., NR UE) that is capable of communicating using shortened TTIs. Additionally or alternatively, the first UE 120f can have a reduced feature set compared to the second UE 120g. In some aspects, as described above, the first UE 120f can include an MTC UE, as well as an eMTC UE, an IoT UE, and / or the like.

[0037] As described above, provided Figure 1 as an example. Other examples can be different from those Figure 1 described in connection with

[0038] Figure 2 FIG. 200 shows a block diagram of a design 200 of a base station 110 and a UE 120, which can be Figure 1 one of the base stations and one of the UEs in

[0039] At base station 110, transmit processor 220 may receive data for one or more UEs from data source 212, select one or more modulation and coding schemes (MCSs) for each UE at least in part based on channel quality indicators (CQIs) received from the UEs, process (e.g., encode and modulate) data for the UE at least in part based on the selected MCS(s) for each UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and / or the like) and control information (e.g., CQI requests, grants, upper layer signaling, and / or the like) and provide overhead symbols and control symbols. Transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRSs)) and synchronization signals (e.g., primary synchronization signal (PSS) and secondary synchronization signal (SSS)). Transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, control symbols, overhead symbols, and / or reference symbols (if applicable) and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process its respective output symbol stream (e.g., for OFDM and / or the like) to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively. According to various aspects described in more detail below, position coding may be utilized to generate synchronization signals to convey additional information.

[0040] At the UE 120, antennas 252a through 252r may receive downlink signals from the base station 110 and / or other base stations and may provide the received signals to (multiple) demodulators (DEMOD) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, down-convert, and digitize) the received signal to obtain an input sample. Each demodulator 254 may also process the input sample (e.g., for OFDM and / or the like) to obtain a received symbol. The MIMO detector 256 may obtain the received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols (if applicable), and provide the detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide the decoded data for the UE 120 to a data sink 260, and provide the decoded control information and system information to the controller / processor 280. The channel processor may determine a reference signal received power (RSRP), a received signal strength indicator (RSSI), a reference signal received quality (RSRQ), a channel quality indicator (CQI), and / or the like. In some aspects, one or more components of the UE 120 may be included in a housing.

[0041] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from the data source 262 and control information from the controller / processor 280 (e.g., for reporting including RSRP, RSSI, RSRQ, CQI, and / or the like). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 (if applicable), further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, and / or the like), and transmitted to the base station 110. At the base station 110, the uplink signals from the UE 120 and other UEs may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236 (if applicable), and further processed by the receive processor 238 to obtain the decoded data and control information transmitted by the UE 120. The receive processor 238 may provide the decoded data to a data sink 239 and provide the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292.

[0042] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / orFigure 2 Any other component(s) may perform one or more techniques associated with multiplexing communications with UEs supporting different transmission time interval lengths, as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 any other component(s) may perform or direct operations such as, for example Figure 6 procedure 600 of Figure 7 procedure 700 of Figure 6 and / or other procedures described herein. The memories 242 and 282 may store data and program codes for the base station 110 and the UE 120, respectively. In some aspects, the memory 242 and / or the memory 282 may include a non-transitory computer-readable medium storing one or more instructions for wireless communication. For example, when executed by one or more processors of the base station 110 and / or the UE 120, the one or more instructions may perform or direct operations such as, for example Figure 7 procedure 600 of

[0043] In some aspects, the UE 120 may include components for receiving (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, and / or the like) a first DCI that schedules the start of data communication in a first TTI on a first frequency band, where the first frequency band is configured with an uplink / downlink TDD pattern synchronized with a second frequency band; for receiving or transmitting (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and / or the like) a first portion of data communication in the first TTI at least in part based on receiving the first DCI; for receiving (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, memory 282, and / or the like) a second DCI that schedules a second portion of data communication in a second TTI on the first frequency band, where the second DCI indicates that the second portion is part of the data communication; for receiving or transmitting (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and / or the like) a second portion of data communication in the second TTI at least in part based on receiving the second DCI; and / or the like. In some aspects, such components may include one or more components of the UE 120 described in conjunction with Figure 2 such as receive processor 258, transmit processor 264, controller / processor 280, memory 282, and / or the like.

[0044] In some aspects, the base station 110 may include components for configuring (e.g., using the controller / processor 240, the memory 242, and / or the like) a set of TTIs on a first frequency band using an uplink / downlink TDD pattern that is synchronized with an overlapping set of TTIs on a second frequency band, where the first frequency band is for a first type of UE that cannot communicate using shortened TTIs and the second frequency band is for a second type of UE that can communicate using shortened TTIs; components for transmitting (e.g., using the controller / processor 240, the transmit processor 220, the TX MIMO processor 230, the MOD 232, the antenna 234, and / or the like) a first DCI that schedules the start of data communication in a first TTI of the first set of TTIs; components for receiving or transmitting (e.g., using the antenna 234, the DEMOD 232, the MIMO detector 236, the receive processor 238, the controller / processor 240, the transmit processor 220, the TX MIMO processor 230, the MOD 232, the antenna 234, and / or the like) a first portion of the data communication in the first TTI at least in part based on transmitting the first DCI; components for transmitting (e.g., using the controller / processor 240, the transmit processor 220, the TX MIMO processor 230, the MOD 232, the antenna 234, and / or the like) a second DCI that schedules a second portion of the data communication in a second TTI of the first set of TTIs, where the second DCI indicates that the second portion is part of the data communication; components for receiving or transmitting (e.g., using the antenna 234, the DEMOD 232, the MIMO detector 236, the receive processor 238, the controller / processor 240, the transmit processor 220, the TX MIMO processor 230, the MOD 232, the antenna 234, and / or the like) the second portion of the data communication in the second TTI at least in part based on transmitting the second DCI; and / or the like. In some aspects, such components may include one or more components of the base station 110 described in connection with Figure 2 such as the transmit processor 220, the receive processor 238, the controller / processor 240, the memory 242, and / or the like.

[0045] As described above, provided Figure 2 as an example. Other examples may be different from those described in connection with Figure 2 such.

[0046] Figure 3 FIG. 300 is a diagram illustrating an example 300 of different transmit time interval lengths for different frequency bands in accordance with various aspects of the present disclosure.

[0047] As described above in connection with Figure 1As described, in some aspects, the base station 110 may serve different UEs 120 of different categories, support different UEs 120 with different capabilities, and / or the like. For example, the base station 110 may serve a first category of UEs (such as the UE 120f in Figure 1 with relatively less advanced capabilities (e.g., lower capabilities) and a second category of UEs (such as the UE 120g in Figure 1 with relatively more advanced capabilities (e.g., higher capabilities). In such a case, compared to the second category of UEs, the first category of UEs may have a reduced feature set. For example, the first category of UEs may support a lower maximum modulation and coding scheme (MCS) than the second category of UEs (e.g., quadrature phase shift keying (QPSK) and / or the like compared to 256 quadrature amplitude modulation (QAM)), may support a lower transmit power than the second category of UEs, may have a less advanced beamforming capability than the second category of UEs, may be able to communicate on a narrower maximum bandwidth part than the second category of UEs, and / or the like. In some cases, the second category of UEs may be able to use shortened TTIs (e.g., 1 ms or shorter, 0.5 ms, 0.25 ms, 0.125 ms, 0.0625 ms, and / or similar time slot lengths depending on the subcarrier spacing), and the first category of UEs may not be able to communicate using shortened TTIs.

[0048] To serve different UEs 120 of different categories and / or with different capabilities, the base station 110 may multiplex the communications of different UEs 120 in a shared spectrum. In some cases, the base station 110 may use time division multiplexing (TDM), such as by allocating the entire spectrum to the first category of UEs, then to the second category of UEs, then back to the first category of UEs, and so on. However, depending on the number of different categories of UEs 120, this use of the spectrum may be inefficient. In addition, some scenarios of NR support ultra-reliable low-latency communication (URLLC) and other low-latency scenarios, and using TDM increases the latency in such scenarios, making it more difficult to meet the latency requirements (e.g., for the second category of UEs).

[0049] As Figure 3 shown, and by reference numeral 305, the base station 110 may use frequency division multiplexing (FDM) to multiplex the communications of different UEs 120 in a shared spectrum. For example, the base station 110 may allocate a first frequency band (e.g., a first part of the shared spectrum) of the shared spectrum to UEs with lower capabilities (e.g., relatively less advanced capabilities, such as the second category of UEs), and may allocate a second frequency band (e.g., a second part of the shared spectrum) of the shared spectrum to UEs with higher capabilities (e.g., relatively more advanced capabilities, such as the first category of UEs). Although Figure 3The first frequency band of a UE with lower capabilities is shown as having a higher frequency than the second frequency band of a UE with higher capabilities, but in some aspects, the first frequency band of the UE with lower capabilities has a lower frequency than the second frequency band of the UE with higher capabilities. As an example, the range of the first frequency band can be from 6000 MHz to 6010 MHz, and the range of the second frequency band can be from 6010 MHz to 6100 MHz.

[0050] In some aspects, compared with the second frequency band of a UE with higher capabilities, the first frequency band of a UE with lower capabilities may occupy less channel bandwidth and / or fewer component carrier parts. For example, the first frequency band of a UE with lower capabilities may include 10% of the total channel bandwidth, while the second frequency band of a UE with higher capabilities may include 90% of the total channel bandwidth. In an example component carrier of 100 MHz, this means that the first frequency band occupies, for example, 10 MHz and the second frequency band occupies 90 MHz, similar to the above example of 6000 MHz to 6100 MHz. Other bandwidth divisions are also possible, such as 20% vs. 80%, 30% vs. 70%, and / or the like. In some aspects, the first frequency band and the second frequency band may be within the same frequency range (FR). For example, the first frequency band and the second frequency band may both be in frequency range 1 (FR1, including frequency bands below 6 GHz, some of which may include frequency bands used in previous standards, e.g., LTE), frequency range (FR2, including frequency bands above 24 GHz), etc., or both are designated frequency bands therein.

[0051] As shown by reference numeral 310, a UE with higher capabilities may be able to communicate using a shorter TTI, while a UE with lower capabilities may not be able to communicate using a shorter TTI. For example, the minimum TTI length supported by a UE with higher capabilities may be shorter than the minimum TTI length supported by a UE with lower capabilities. Since the TTI can be configured for the transmission of either uplink data or downlink data, this may result in overlapping (e.g., concurrent) TTIs on different frequency bands with different configurations. For example, as shown by reference numeral 315, the TTI configured for downlink data (e.g., downlink TTI) on the first frequency band may overlap with the TTI configured for uplink data (e.g., uplink TTI) on the second frequency band, or the uplink TTI on the first frequency band may overlap with the downlink TTI on the second frequency band.

[0052] However, if base station 110 is restricted by a half-duplex constraint, which means that base station 110 cannot transmit and receive communications simultaneously, then base station 110 may not be able to transmit communications on the first frequency band and receive communications on the second frequency band simultaneously, and vice versa. Some of the techniques and apparatuses described herein allow base station 110 to use frequency division multiplexing under the half-duplex constraint to serve a first type of UE that cannot communicate using shortened TTIs and a second type of UE that can communicate using shortened TTIs. In this way, the spectrum shared between different types of UEs 120 can be used effectively. In addition, more stringent requirements for the second type of UE (e.g., URLLC requirements, low latency requirements, and / or the like) can be met.

[0053] As described above, provide Figure 3 as an example. Other examples may be different from those Figure 3 described with respect to

[0054] Figure 4 is a diagram illustrating an example 400 of multiplexed communication of UEs supporting different transmission time interval lengths in accordance with various aspects of the present disclosure.

[0055] As Figure 4 shown, for a first type of UE that cannot communicate using shortened TTIs and a second type of UE that can communicate using shortened TTIs, the shared spectrum can be frequency division multiplexed, as described above in connection with Figure 3 For example, a first portion of the shared spectrum (e.g., the first frequency band) can be used for communication with the first type of UE, and a second portion of the shared spectrum (e.g., the second frequency band) can be used for communication with the second type of UE. In some aspects, the first type of UE may have a reduced feature set compared to the second type of UE.

[0056] As shown by reference numeral 405, base station 110 may determine an uplink / downlink (UL / DL) time division duplex (TDD) pattern configured for the second frequency band. The UL / DL TDD pattern may refer to a configuration of a set of TTIs for uplink data and downlink data, where a first subset of the set of TTIs may be configured for uplink data and a second subset of the set of TTIs may be configured for downlink data. In Figure 4 an example, an exemplary UL / DL TDD pattern for the second frequency band shows a first TTI configured for downlink data, a second TTI configured for uplink data, a third TTI configured for downlink data, etc., where consecutive TTIs alternate between uplink data and downlink data. This UL / DL TDD pattern is shown as an example, and different UL / DL TDD patterns may be used.

[0057] In some aspects, the UL / DL TDD pattern of the second band can be fixed (e.g., semi-statically configured, such as in a Radio Resource Control (RRC) configuration message). In this case, the base station 110 can determine the fixed UL / DL TDD pattern (e.g., at least in part based on the UL / DL TDD pattern indicated in the RRC message). Alternatively, the UL / DL TDD pattern of the second band can be determined dynamically over time, such as at least in part based on traffic load. In this case, the base station 110 can determine the UL / DL TDD pattern dynamically over time since the UL / DL TDD pattern is configured. In some aspects, a semi-statically configured UL / DL TDD pattern (e.g., configured in an RRC message) can be dynamically overwritten (e.g., via one or more Downlink Control Information (DCI) messages).

[0058] As shown by reference numeral 410, the base station 110 can synchronize the UL / DL TDD pattern for the first band (e.g., the first UL / DL TDD pattern) with the determination of the UL / DL TDD pattern for the second band (e.g., the second UL / DL TDD pattern). For example, the base station 110 can synchronize the UL / DL TDD patterns by configuring the set of TTIs on the first band with UL / DL TDD patterns that are synchronized with an overlapping set of TTIs on the second band. Thus, if the corresponding TTI on the second band is configured for downlink data, the base station 110 can configure the TTI on the first band for downlink data. Similarly, if the corresponding TTI on the second band is configured for uplink data, the base station 110 can configure the TTI on the first band for uplink data. The corresponding TTI on the second band can overlap with the TTI on the first band and can include complete overlap when the TTIs are time-aligned.

[0059] As shown by reference numeral 415, the base station 110 can schedule a portion of a data communication (e.g., an uplink communication or a downlink communication) in discontinuous TTIs on the first band. For example, since the TTIs on the first band can be configured with a shorter TTI length than what is supported by a first type of UE, the base station 110 can configure the data communication on the first band to be split into multiple portions transmitted over multiple TTIs. In this way, a lower-capability UE can transmit or receive a data communication using a TTI length that is shorter than the minimum TTI length supported by the lower-capability UE, and the base station 110 can frequency-division multiplex the communications of lower-capability UEs and higher-capability (e.g., supporting a shorter TTI length) UEs.

[0060] As described above, provide Figure 4 as an example. Other examples may be different from those described with respect to Figure 4 what is described.

[0061] Figure 5 FIG. 500 is another example showing multiplexed communication of UEs supporting different transmission time interval lengths in accordance with various aspects of the present disclosure.

[0062] As Figure 5 shown, base station 110 and UE 120 (e.g., as Figure 1 shown, UE 120f with lower capabilities) can communicate with each other. Base station 110 can serve a first type of UE that cannot communicate using shortened TTIs and can serve a second type of UE that can communicate using shortened TTIs. As described above, the first frequency band can be used to communicate with the first type of UE, and the second frequency band can be used to communicate with the second type of UE. Figure 5 UE 120f shown can be the first type of UE and can communicate with base station 110 using the first frequency band. Thus, UE 120f can have a reduced feature set compared to a UE that communicates with base station 110 using the second frequency band (e.g., UE 120g according to Figure 1 ). Although UE 120f is shown as a smart phone, in some aspects, UE120f can be an MTC UE, an eMTC UE, an IoT UE, and / or the like, as described above in connection with Figure 1 FIG.

[0063] As indicated by reference numeral 505, base station 110 can configure a set of TTIs on the first frequency band in a UL / DL TDD pattern that is synchronized with an overlapping set of TTIs on the second frequency band, as described above in connection with Figure 4 FIG. For example, if the corresponding TTI on the second frequency band (e.g., overlapping with the TTI) is configured for downlink data, base station 110 can configure the TTI on the first frequency band for downlink data, or if the corresponding TTI is configured for uplink data, base station 110 can configure the TTI for uplink data.

[0064] In some aspects, base station 110 can indicate the UL / DL TDD pattern of the first frequency band to UE 120f. For example, base station 110 can send a configuration message (e.g., a radio resource control (RRC) message and / or the like) that indicates the UL / DL TDD pattern of the first frequency band. When, for example, the UL / DL TDD pattern of the second frequency band is fixed and / or semi-statically configured (e.g., in an RRC message), base station 110 can indicate the UL / DL TDD pattern of the first frequency band in the configuration message.

[0065] Additionally or alternatively, the base station 110 may indicate a UL / DL TDD pattern (or a part of the UL / DL TDD pattern) for a first frequency band in the DCI. For example, the DCI may indicate whether the TTI corresponding to the DCI (e.g., the TTI for which the DCI schedules data communication) is configured for uplink data or downlink data. When, for example, the UL / DL TDD pattern of a second frequency band is dynamically configured (e.g., in the DCI), the base station 110 may indicate the UL / DL TDD pattern of the first frequency band of the DCI (e.g., one or more TTIs). In some aspects, the base station 110 may use a configuration message and the DCI to indicate the UL / DL TDD pattern, such as by using the configuration message to indicate a semi-static UL / DL TDD pattern and using the DCI to override a part of the UL / DL TDD pattern (e.g., the UL / DL configuration of one or more TTIs).

[0066] As shown by reference numeral 510, the base station 110 may send and the UE 120f may receive downlink control information (DCI) (shown as DCI 1) that schedules the start of data communication in the TTI of a configured set of TTIs (e.g., on a first frequency band), shown as TTI 1. In Figure 5 this example, the data communication is shown as packet 1 and is a downlink data communication. In example 500, the scheduling of the start of packet 1 by DCI 1 occurs in the same TTI (shown as TTI 1) as the transmission of DCI 1, such as by indicating a time value of zero in DCI 1. The timing value may be the physical downlink control channel (PDCCH) to physical downlink shared channel (PDSCH) timing value (e.g., the k0 value) for downlink data communication, or may be the PDCCH to physical uplink shared channel (PUSCH) timing value (e.g., the k2 value) for uplink data communication. This timing value is shown as an example, and other timing values may be used. Thus, the DCI and the data communication may occur in different TTIs.

[0067] As shown by reference numeral 515, as scheduled by DCI 1, the base station 110 may send and the UE 120f may receive the first part of the downlink data communication (packet 1) in TTI 1. In Figure 5 this example, the first part of packet 1 is shown as data 1.1 to indicate the first part of the first packet in TTI 1. In some aspects, the UE 120f may store the first part in a buffer until all parts of the first packet are received.

[0068] As shown by reference numeral 520, base station 110 may transmit and UE 120f may receive DCI 2, which schedules the start of data communication in another TTI of the configured set of TTIs (e.g., on the first frequency band), shown as TTI 2. In Figure 5 this example, the data communication is shown as packet 2 and is an uplink data communication. In example 500, the start of packet 2 being scheduled by DCI 2 occurs in the same TTI as the transmission of DCI 2 (shown as TTI 2), such as by indicating a time value of zero in DCI 2. As described above, other timing values may be used, and the DCI and the data communication may occur in different TTIs.

[0069] As shown by reference numeral 525, as scheduled by DCI 2, UE 120f may transmit in TTI 2 and base station 110 may receive the first part of the uplink data communication (packet 2). In Figure 5 this example, the first part of packet 2 is shown as data 2.1 to indicate the first part of the second packet in TTI 2. In some aspects, base station 110 may store the first part in a buffer until all parts of the second packet are received.

[0070] As shown by reference numeral 530, base station 110 may transmit and UE 120f may receive DCI 3, which schedules the second part (e.g., continuation) of the downlink data communication in a TTI of the configured set of TTIs (e.g., on the first frequency band), shown as TTI 3. In example 500, the scheduling of the second part of packet 1 by DCI 3 occurs in the same TTI as the transmission of DCI 3 (shown as TTI 3), but different PDCCH to PDSCH timings may be used. As shown, DCI 3 may indicate that the communication scheduled by DCI 3 is a continuation of a previous downlink data communication. For example, DCI 3 may indicate that the second part scheduled by DCI 3 is part of the downlink data communication scheduled by DCI 1. In some aspects, the indication may be a single bit indicating whether the communication scheduled by DCI 3 is part of a previous data communication. In this case, a first value of the bit (e.g., 1) may indicate that the communication scheduled by DCI 3 is part of a previous data communication (e.g., in this case, packet 1 is the previous downlink data communication), and a second value of the bit (e.g., 0) may indicate that the communication scheduled by DCI 3 is not part of a previous data communication (e.g., is the start of a new downlink data communication).

[0071] In some aspects, scheduling data communication (e.g., Figure 5The start of DCI 1) (e.g., the first part) of DCI (e.g., the first DCI) may have a first DCI format and schedule data communication (e.g., Figure 5 The continuation of DCI 3) (e.g., the second part, the third part, etc.) of DCI (e.g., subsequent DCI, the second DCI, the third DCI, and / or the like) may have a different second DCI format. For example, the DCI having the first DCI format may indicate a first TTI for uplink data or downlink data, the UE identifier of UE 120f, the modulation and coding scheme (MCS) for data communication, the resource allocation for data communication, and / or the like. In some aspects, the DCI having the second DCI format may exclude the MCS and / or the resource allocation. Additionally or alternatively, the DCI having the second DCI format may indicate that the communication scheduled by such DCI is a continuation of a previous data communication, may indicate whether the communication scheduled by such DCI is the last part of the data communication, and / or the like (and such information may not be included in the DCI having the first DCI format).

[0072] In some aspects, the DCI scheduling the continuation of data communication may indicate whether the TTI in which the scheduling continues is configured for uplink data or downlink data in accordance with the first DCI. This may enable UE 120f to determine the second part of the data communication scheduled by the second DCI. In this way, UE120f can appropriately send or receive data. For example, if the DCI indicates that the TTI is configured for uplink data, then UE 120f can continue the data communication by sending a part of the uplink data communication. Similarly, if the DCI indicates that the TTI is configured for downlink data, then UE 120f can continue the data communication by receiving a part of the uplink data communication. Additionally or alternatively, UE 120f can avoid monitoring the TTI at least partially based on whether the TTI is configured for uplink data or downlink data, which can be determined at least partially based on the indication in the DCI. For example, if any given DCI indicates that the corresponding TTI is configured for uplink data and UE120f is not in the process of sending uplink data (e.g., no data is stored in the buffer for uplink transmission), then UE 120f can avoid monitoring (e.g., can skip) the TTI. Similarly, if any given DCI indicates that the corresponding TTI is configured for downlink data and UE120f is not in the process of receiving downlink data (e.g., has not received any part of the downlink data communication), then UE 120f can avoid monitoring (e.g., can skip) the TTI.

[0073] As shown by reference numeral 535, the base station 110 may transmit in TTI 3 and the UE 120f may receive the second part of a downlink data communication (packet 1) as scheduled by DCI 3. Thus, different parts of a data communication (e.g., an uplink data communication or a downlink data communication) may be scheduled in discontinuous TTIs (e.g., TTI 1 and TTI 3). In Figure 5 , the second part of packet 1 is shown as data 1.2 to indicate the second part of the first packet in TTI 3. In some aspects, the UE 120f may store the second part in a buffer until all parts of the first packet are received.

[0074] As shown by reference numeral 540, the base station 110 may transmit and the UE 120f may receive DCI 4 that schedules a second part (e.g., a continuation) of an uplink data communication in a TTI of a configured set of TTIs (e.g., on a first frequency band), shown as TTI 4. In example 500, the scheduling of the second part of packet 2 by DCI 4 occurs in the same TTI (shown as TTI 4) in which DCI 4 is transmitted, but a different PDCCH-to-PUSCH timing may be used. As shown, DCI 4 may indicate that the communication scheduled by DCI 4 is a continuation of a previous uplink data communication. For example, DCI 4 may indicate that the second part scheduled by DCI 4 is part of the uplink data communication scheduled by DCI 2. In some aspects, the indication may be a single bit indicating whether the communication scheduled by DCI 4 is part of a previous data communication. In this case, a first value (e.g., 1) of the bit may indicate that the communication scheduled by DCI 4 is part of a previous data communication (e.g., in this case, packet 2 is a previous uplink data communication), and a second value (e.g., 0) of the bit may indicate that the communication scheduled by DCI 4 is not part of a previous data communication (e.g., is the start of a new uplink data communication).

[0075] In some aspects, the DCI for scheduling the continuation of a data communication can indicate whether the TTI in which the continuation is scheduled includes the last part of the data communication (e.g., can indicate whether a part of the data communication scheduled by the DCI is the last part of the data communication). In this way, UE 120f or the base station 110 can combine received communications for decoding, demodulating, and / or the like. For example, if the DCI indicates that the scheduled part is the last part of a downlink data communication, UE 120f can decode and / or demodulate the downlink data communication when the scheduled part is received (e.g., by combining that part with other parts received by UE 120f). Similarly, if the DCI indicates that the scheduled part is the last part of an uplink data communication, the base station 110 can decode and / or demodulate the uplink data communication when the scheduled part is received (e.g., by combining that part with other parts received by the base station 110).

[0076] In some aspects, the DCI for scheduling the start of a data communication (e.g., the first part of the data communication) can indicate multiple TTIs that include the corresponding part of the data communication. For example, the DCI may include an MCS for indicating the number of TTIs. In some aspects, the MCS can indicate a block size (e.g., a transport block (TB) size) that indicates the number of TTIs. In this case, the DCI for scheduling the continuation of the data communication can exclude an indication of whether the part scheduled by the DCI is the last part, because UE 120f will be able to determine that the part is the last part at least in part based on the indicated number of TTIs. Alternatively, in some aspects, the MCS may not indicate the block size and / or the number of TTIs. In this case, the DCI for scheduling the continuation of the data communication can include an indication of whether the part scheduled by the DCI is the last part, such that UE 120f can determine whether the part is the last part.

[0077] As shown by reference numeral 545, as scheduled by DCI 4, UE 120f can transmit in TTI 4 and the base station 110 can receive the second part of the uplink data communication (packet 2). Thus, different parts of a data communication (e.g., an uplink data communication or a downlink data communication) can be scheduled in non-consecutive TTIs (e.g., TTI 2 and TTI 4). In Figure 5In it, the second part of group 2 is shown as data 2.2 to indicate the second part of the second group in TTI 4. In some aspects, the base station 110 may store the second part in a buffer until all parts of the second group are received. In example 500, the second part of the uplink data communication is the last part, which may be indicated by DCI 2 (e.g., using the MCS indicating that the uplink data communication spans two TTIs) and / or by DCI 4 (e.g., using a bit indicating that the second part is the last part). Thus, upon receiving the second part, the base station 110 may process the uplink data communication.

[0078] As shown by reference numeral 550, the base station 110 may transmit and the UE 120f may receive DCI 5, which schedules a third part (e.g., a continuation) of the downlink data communication in a TTI of the configured set of TTIs (e.g., on the first frequency band), shown as TTI 5. In example 500, the scheduling of the third part of packet 1 by DCI 5 occurs in the same TTI (shown as TTI 5) in which DCI 5 is transmitted, but different PDCCH-to-PDSCH timings may be used. As shown, DCI 5 may indicate that the communication scheduled by DCI 5 is a continuation of a previous downlink data communication. For example, DCI 5 may indicate, in a similar manner as described above, that the third part scheduled by DCI 5 is part of the downlink data communication scheduled by DCI 1 (and DCI 3). In some aspects, as described above, DCI 1 and / or DCI 5 may indicate that the third part is the last part of the downlink data communication.

[0079] In some aspects, the UE 120f may monitor DCI in the TTI on the first frequency band at least in part based on a determination that a previously received part of the data communication is not the last part of the data communication. For example, as described above, the base station 110 may indicate whether a scheduled part of the data communication is the last part of the data communication. When a part scheduled by a TTI is not the last part, the UE 120f may continue to monitor DCI on subsequent TTIs until the last part is scheduled and / or received. In example 500, the UE 120f may determine that the second part of packet 1 is not the last part (e.g., due to the indication in DCI 1 and / or DCI 3). In this case, the UE 120f may monitor DCI in TTI 5.

[0080] As shown by reference numeral 555, as scheduled by DCI 5, the base station 110 may transmit and the UE 120f may receive the third part of the downlink data communication (packet 1) in TTI 5. In Figure 5In it, the third part of Group 1 is shown as Data 1.3 to indicate the second part of the third group in TTI 5. In some aspects, UE 120f may store the second part in a buffer until all parts of the first group are received. In Example 500, the third part of the downlink data communication is the last part, which may be indicated by DCI 1 (e.g., using the MCS indicating that the downlink data communication spans three TTIs) and / or by DCI 5 (e.g., using a bit indicating that the third part is the last part). Thus, upon receiving the third part, UE120f may process the uplink data communication.

[0081] As described above, provided Figure 5 as an example. Other examples may be different from those Figure 5 described with respect to

[0082] Figure 6 is a diagram showing an example process 600, such as performed by a UE, in accordance with various aspects of the present disclosure. Example process 600 is an example of operations performed by a UE (e.g., UE 120, UE 120f, and / or the like) associated with supporting multiplexed communication for UEs with different TTI lengths.

[0083] As Figure 6 shown, in some aspects, process 600 may include receiving a first downlink control information (DCI), the first DCI scheduling the start of data communication in a first transmission time interval (TTI) on a first frequency band, where the first frequency band is configured with an uplink / downlink time division duplex (TDD) pattern synchronized with a second frequency band (block 610). For example, a UE (e.g., using a receiving processor 258, a controller / processor 280, a memory 282, and / or the like) may receive the first DCI that schedules the start of data communication in the first TTI on the first frequency band, as described above in connection with Figure 4 and 5 described. In some aspects, the first frequency band is configured with a UL / DL TDD pattern synchronized with the second frequency band.

[0084] As Figure 6 further shown in Figure 4 and 5 described above, in some aspects, process 600 may include receiving or transmitting a first part of the data communication in the first TTI at least in part based on receiving the first DCI (block 620). For example, a UE (e.g., using a receiving processor 258, a transmitting processor 264, a controller / processor 280, a memory 282, and / or the like) may receive or transmit the first part of the data communication in the first TTI at least in part based on receiving the first DCI, as described above in connection with

[0085] AsFigure 6 As further shown, in some aspects, process 600 may include receiving a second DCI that schedules a second portion of a data communication in a second TTI on a first frequency band, where the second DCI indicates that the second portion is part of the data communication (block 630). For example, a UE (e.g., using a receiving processor 258, a controller / processor 280, a memory 282, and / or the like) may receive a second DCI that schedules a second portion of a data communication in a second TTI on a first frequency band, as described above in connection with Figure 4 and 5 described. In some aspects, the second DCI indicates that the second portion is part of the data communication.

[0086] As Figure 6 further shown, in some aspects, process 600 may include receiving or transmitting the second portion of the data communication in the second TTI based at least in part on receiving the second DCI (block 640). For example, a UE (e.g., using a receiving processor 258, a transmitting processor 264, a controller / processor 280, a memory 282, and / or the like) may receive or transmit the second portion of the data communication in the second TTI based at least in part on receiving the second DCI, as described above in connection with Figure 4 and 5 described.

[0087] Process 600 may include additional aspects, such as any individual aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.

[0088] In a first aspect, the second DCI further indicates whether the second portion is the last portion of the data communication.

[0089] In a second aspect, separately in combination with the first aspect, the second DCI has a different format from the first DIC.

[0090] In a third aspect, separately or in combination with one or more of the first and second aspects, the first DCI includes an indication of one of uplink data or downlink data, a UE identifier of the UE, an MCS for the data communication, and a resource allocation for the data communication, and wherein the second DCI indicates that one of the uplink data or downlink data is consistent with the first DCI to enable the UE to determine that the second DCI schedules the second portion of the data communication.

[0091] In a fourth aspect, separately or in combination with one or more of the first through third aspects, the MCS indication includes a plurality of TTIs of the corresponding portion of the data communication, and the second DCI excludes an indication of whether the second portion is the last portion of the data communication.

[0092] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the MCS does not indicate a plurality of TTIs including the corresponding part of the data communication, and the second DCI includes an indication of whether the second part is the last part of the data communication.

[0093] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the first TTI and the second TTI are discontinuous.

[0094] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the first frequency band is for a first type of UE that cannot communicate using shortened TTIs, and the second frequency band is for a second type of UE that can communicate using shortened TTIs.

[0095] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the UE has a reduced feature set compared to a UE communicating using the second frequency band.

[0096] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, the data communication is downlink data communication, and receiving or transmitting the first part includes receiving the first part, and receiving or transmitting the second part includes receiving the second part.

[0097] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, the data communication is uplink data communication, and receiving or transmitting the first part includes transmitting the first part, and receiving or transmitting the second part includes transmitting the second part.

[0098] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, process 600 includes monitoring a third DCI on the first frequency band at least in part based on a determination that the second part is not the last part of the data communication.

[0099] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the uplink / downlink TDD pattern is indicated in a configuration message received by the UE.

[0100] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the first DCI indicates whether the first TTI is configured for uplink data or downlink data, and the second DCI indicates whether the second TTI is configured for uplink data or downlink data consistent with the first DCI.

[0101] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the data communication is for one of uplink data or downlink data, and the UE is configured to avoid monitoring TTIs configured for the other of uplink data or downlink data.

[0102] Although Figure 6 illustrative blocks of process 600 are shown, in some aspects, process 600 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Figure 6 . Additionally or alternatively, two or more blocks of process 600 may be executed in parallel.

[0103] Figure 7 is a diagram illustrating an example process 700, such as may be performed by a base station, in accordance with various aspects of the present disclosure. Example process 700 is an example of operations performed by a base station (e.g., base station 110 and / or the like) associated with multiplexing communications with UEs supporting different TTI lengths.

[0104] As Figure 7 shown, in some aspects, process 700 may include configuring a set of transmission time intervals (TTIs) on a first frequency band in an uplink / downlink time division duplex (TDD) pattern that is synchronized with an overlapping set of TTIs on a second frequency band, where the first frequency band is for a first type of user equipment (UE) that cannot communicate using a shortened TTI and the second frequency band is for a second type of UE that can communicate using a shortened TTI (block 710). For example, a base station (e.g., using transmission processor 220, controller / processor 240, memory 242, and / or the like) may configure the set of TTIs on the first frequency band in a UL / DL TDD pattern that is synchronized with the overlapping set of TTIs on the second frequency band, as described above in connection with Figure 4 and 5 . In some aspects, the first frequency band is for a first type of UE that cannot communicate using a shortened TTI and the second frequency band is for a second type of UE that can communicate using a shortened TTI.

[0105] As Figure 7 further shown, in some aspects, process 700 may include transmitting a first downlink control information (DCI) that schedules the start of data communication in a first TTI of the first set of TTIs (block 720). For example, a base station (e.g., using transmission processor 220, controller / processor 240, memory 242, and / or the like) may transmit a first DCI that schedules the start of data communication in a first TTI of the first set of TTIs, as described above in connection with Figure 4 and 5 .

[0106] As Figure 7As further shown in, in some aspects, process 700 may include receiving or transmitting a first portion of a data communication in a first TTI based at least in part on transmitting a first DCI (block 730). For example, a base station (e.g., using a transmit processor 220, a receive processor 238, a controller / processor 240, a memory 242, and / or the like) may receive or transmit a first portion of a data communication in a first TTI based at least in part on transmitting a first DCI, as described above in connection with Figure 4 and 5 described.

[0107] As Figure 7 further shown in, in some aspects, process 700 may include transmitting a second DCI that schedules a second portion of a data communication in a second TTI of a first set of TTIs, where the second DCI indicates that the second portion is part of the data communication (block 740). For example, a base station (e.g., using a transmit processor 220, a controller / processor 240, a memory 242, and / or the like) may transmit a second DCI that schedules a second portion of a data communication in a second TTI of a first set of TTIs, as described above in connection with Figure 4 and 5 described. In some aspects, the second DCI indicates that the second portion is part of the data communication.

[0108] As Figure 7 further shown in, in some aspects, process 700 may include receiving or transmitting a second portion of a data communication in a second TTI based at least in part on transmitting the second DCI (block 750). For example, a base station (e.g., using a transmit processor 220, a receive processor 238, a controller / processor 240, a memory 242, and / or the like) may receive or transmit a second portion of a data communication in a second TTI based at least in part on transmitting the second DCI, as described above in connection with Figure 4 and 5 described.

[0109] Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in combination with one or more other processes described elsewhere herein.

[0110] In a first aspect, if a corresponding TTI that overlaps with the first TTI in an overlapping set of TTIs is configured for downlink data, then the first TTI is configured for downlink data, or if the corresponding TTI is configured for uplink data, then the first TTI is configured for uplink data.

[0111] In a second aspect, alone or in combination with the first aspect, the second DCI also indicates whether the second portion is the last portion of the data communication.

[0112] In a third aspect, alone or in combination with one or more of the first and second aspects, the second DCI has a different format from the first DCI.

[0113] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the first DCI includes an indication of one of uplink data or downlink data, a UE identifier of the UE, an MCS for data communication, and a resource allocation for data communication, and wherein the second DCI indicates that one of uplink data or downlink data is consistent with the first DCI, so that the UE can determine a second part of the data communication scheduled by the second DCI.

[0114] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the MCS indication includes a plurality of time slots of a part of the data communication, and the second DCI excludes an indication of whether the second part is the last part of the data communication.

[0115] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the MCS does not indicate a plurality of time slots of a part of the data communication, and the second DCI includes an indication of whether the second part is the last part of the data communication.

[0116] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the first TTI and the second TTI are discontinuous.

[0117] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the data communication is downlink data communication, and receiving or transmitting the first part includes transmitting the first part, and receiving or transmitting the second part includes transmitting the second part.

[0118] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, the data communication is uplink data communication, and receiving or transmitting the first part includes receiving the first part, and receiving or transmitting the second part includes receiving the second part.

[0119] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, the process 700 includes transmitting a configuration message indicating the TDD pattern when indicating uplink / downlink.

[0120] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the first DCI indicates whether the first TTI is configured for uplink data or downlink data, and the second DCI indicates whether the second TTI is configured for uplink data or downlink data consistent with the first DCI.

[0121] Although Figure 7illustrates example blocks of process 700, but in some aspects, process 700 may include additional blocks, fewer blocks, different blocks, or blocks in a different arrangement than those depicted in Figure 7 and two or more blocks of process 700 may be executed in parallel. Additionally or alternatively,

[0122] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure, or may be obtained from practice of the aspects.

[0123] As used herein, the term "component" is intended to be broadly construed as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented with hardware, firmware, and / or a combination of hardware and software.

[0124] As used herein, depending on the context, meeting a threshold may refer to a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and / or the like.

[0125] It will be apparent that the systems and / or methods described herein may be implemented in different forms of hardware, firmware, and / or a combination of hardware and software. The actual specific control hardware or software code used to implement these systems and / or methods is not a limitation on the aspects. Accordingly, the operations and behavior of the systems and / or methods are described herein without reference to specific software code, understanding that software and hardware may be designed to implement the systems and / or methods at least in part based on the description herein.

[0126] Even if specific combinations of features are recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of the various aspects. In fact, many of these features may be combined in ways not specifically recited in the claims and / or specifically disclosed in the specification. Although each dependent claim listed below may directly depend on only one claim, the disclosure of the various aspects includes the combination of each dependent claim with every other claim in the claim set. The phrase referring to "at least one" of a list of items refers to any combination of those items, including a single member. As an example, "at least one of a, b, or c" is intended to cover a, b, c, a - b, a - c, b - c, and a - b - c, as well as any combination with multiple identical elements (e.g., a - a, a - a - a, a - a - b, a - a - c, a - b - b, a - c - c, b - b, b - b - b, b - b - c, c - c, and c - c - c, or any other arrangement of a, b, and c).

[0127] None of the elements, acts, or instructions used herein shall be construed as critical or essential unless expressly described as such. Additionally, as used herein, the articles "a" and "an" are intended to include one or more items and may be used interchangeably with "one or more." Additionally, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, unrelated items, combinations of related and unrelated items, and / or the like) and may be used interchangeably with "one or more." Where only one item is intended, the phrase "only one" or similar language is used. Additionally, as used herein, the terms "has," "have," "having," and / or similar terms are intended to be open-ended terms. Additionally, unless expressly stated otherwise, the phrase "based on" is intended to mean "at least partially based on."

Claims

1. A wireless communication method performed by a user equipment (UE), comprising: receiving a first downlink control information (DCI), the first DCI scheduling the start of data communication in a first transmission time interval (TTI) on a first frequency band, wherein the first frequency band is configured with an uplink / downlink time division duplex (TDD) pattern synchronized with a second frequency band; wherein the first DCI includes an indication of one of uplink data or downlink data, a UE identifier of the UE, a modulation and coding scheme (MCS) for the data communication, and a resource allocation for the data communication; receiving or transmitting a first part of the data communication in the first TTI at least partially based on receiving the first DCI; receiving a second DCI, the second DCI scheduling a second part of the data communication in a second TTI on the first frequency band, wherein the second DCI indicates that the second part is a part of the data communication; wherein the second DCI further indicates one of uplink data or downlink data consistent with the first DCI, enabling the UE to determine that the second DCI schedules the second part of the data communication; and wherein the MCS indicates a plurality of TTIs including the corresponding part of the data communication, and the second DCI excludes an indication of whether the second part is the last part of the data communication; and receiving or transmitting the second part of the data communication in the second TTI at least partially based on receiving the second DCI.

2. The method according to claim 1, wherein, the second DCI further indicates whether the second part is the last part of the data communication.

3. The method according to claim 1, wherein, the second DCI has a format different from that of the first DCI.

4. The method according to claim 1, wherein, the MCS does not indicate a plurality of TTIs including the corresponding part of the data communication, and the second DCI includes an indication of whether the second part is the last part of the data communication.

5. The method according to claim 1, wherein, the first TTI and the second TTI are discontinuous.

6. The method according to claim 1, wherein, the first frequency band is for a first type of UE that cannot communicate using a shortened TTI, and wherein the second frequency band is for a second type of UE that can communicate using a shortened TTI.

7. The method according to claim 1, wherein, the UE has a reduced feature set compared to a UE communicating using the second frequency band.

8. The method according to claim 1, wherein, the data communication is a downlink data communication, wherein receiving or transmitting the first part includes receiving the first part, and wherein receiving or transmitting the second part includes receiving the second part.

9. The method according to claim 1, wherein, The data communication is uplink data communication, wherein receiving or transmitting the first portion includes transmitting the first portion, and wherein receiving or transmitting the second portion includes transmitting the second portion.

10. The method according to claim 1, further comprising monitoring a third DCI on the first frequency band at least in part based on a determination that the second portion is not the last portion of the data communication.

11. The method according to claim 1, further comprising receiving a configuration message indicating the uplink / downlink TDD pattern.

12. The method according to claim 1, wherein, the first DCI indicates whether the first TTI is configured for uplink data or downlink data, and wherein the second DCI indicates whether the second TTI is configured for uplink data or downlink data consistent with the first DCI.

13. The method according to claim 1, wherein, the data communication is for one of uplink data or downlink data, and wherein the method further comprises avoiding monitoring a TTI configured for the other of uplink data or downlink data.

14. A wireless communication method performed by a base station, comprising: configuring a set of transmission time intervals (TTIs) on a first frequency band with an uplink / downlink time division duplex (TDD) pattern, the uplink / downlink time division duplex (TDD) pattern being synchronized with an overlapping TTI set on a second frequency band, wherein the first frequency band is for a first type of user equipment (UE) that cannot communicate using shortened TTIs, and the second frequency band is for a second type of UE that can communicate using shortened TTIs; transmitting a first downlink control information (DCI), the first DCI scheduling the start of a data communication in a first TTI of the first TTI set; wherein the first DCI includes an indication of one of uplink data or downlink data, a UE identifier of the UE, a modulation and coding scheme (MCS) for the data communication, and a resource allocation for the data communication; receiving or transmitting a first portion of the data communication in the first TTI at least in part based on transmitting the first DCI; transmitting a second DCI, the second DCI scheduling a second portion of the data communication in a second TTI of the first TTI set, wherein the second DCI indicates that the second portion is a part of the data communication; and wherein the second DCI further indicates one of uplink data or downlink data consistent with the first DCI, so that the UE can determine that the second DCI schedules the second portion of the data communication; and wherein the MCS indicates a plurality of TTIs including the portion of the data communication, and the second DCI excludes an indication of whether the second portion is the last portion of the data communication; and receiving or transmitting a second portion of the data communication in the second TTI at least in part based on transmitting the second DCI.

15. The method according to claim 14, further comprising: If the corresponding TTI overlapping with the first TTI in the overlapping TTI set is configured for downlink data, configure the first TTI for downlink data; Or If the corresponding TTI overlapping with the first TTI is configured for uplink data, configure the first TTI for uplink data.

16. The method according to claim 14, Wherein, The second DCI further indicates whether the second part is the last part of the data communication.

17. The method according to claim 14, Wherein, The second DCI has a format different from that of the first DCI.

18. The method according to claim 14, Wherein, The MCS does not indicate a plurality of TTIs including the part of the data communication, and the second DCI includes an indication of whether the second part is the last part of the data communication.

19. The method according to claim 14, Wherein, The first TTI and the second TTI are discontinuous.

20. The method according to claim 14, Wherein, The data communication is a downlink data communication, wherein receiving or transmitting the first part includes transmitting the first part, and wherein receiving or transmitting the second part includes transmitting the second part.

21. The method according to claim 14, Wherein, The data communication is an uplink data communication, wherein receiving or transmitting the first part includes receiving the first part, and wherein receiving or transmitting the second part includes receiving the second part.

22. The method according to claim 14, further comprising transmitting a configuration message indicating the uplink / downlink TDD pattern.

23. The method according to claim 14, Wherein, The first DCI indicates whether the first TTI is configured for uplink data or downlink data, and wherein the second DCI indicates whether the second TTI is configured for uplink data or downlink data consistent with the first DCI.

24. A user equipment UE for wireless communication, Comprising: A memory; And One or more processors operably coupled to the memory, the memory and the one or more processors being configured to: Receive a first downlink control information DCI, the first DCI scheduling the start of a data communication in a first transmission time interval TTI on a first frequency band, wherein the first frequency band is configured with an uplink / downlink time division duplex TDD pattern synchronized with a second frequency band; Wherein, the first DCI includes an indication of either uplink data or downlink data, a UE identifier of the UE, a modulation and coding scheme MCS for the data communication, and a resource allocation for the data communication; Receive or transmit a first part of the data communication in the first TTI at least partially based on receiving the first DCI; Receive a second DCI that schedules a second part of the data communication in a second TTI on the first frequency band, where the second DCI indicates that the second part is part of the data communication; wherein the second DCI further indicates one of uplink data or downlink data that is consistent with the first DCI, so that the UE can determine that the second DCI schedules the second part of the data communication; and wherein the MCS indication includes a plurality of TTIs of the corresponding part of the data communication, and the second DCI excludes an indication of whether the second part is the last part of the data communication; and Receive or transmit a second part of the data communication in the second TTI, at least in part based on receiving the second DCI.

25. The UE according to claim 24, wherein, the second DCI has a format different from that of the first DCI.

26. The UE according to claim 24, wherein, the first frequency band is for a first type of UE that cannot communicate using a shortened TTI, and wherein the second frequency band is for a second type of UE that can communicate using a shortened TTI.

27. The UE according to claim 24, wherein, the UE has a reduced feature set compared to a UE communicating using the second frequency band.

28. The UE according to claim 24, wherein the one or more processors are further configured to monitor a third DCI on the first frequency band at least in part based on a determination that the second part is not the last part of the data communication.

29. The UE according to claim 24, wherein, the one or more processors are further configured to receive a configuration message indicating the uplink / downlink TDD pattern.

30. The UE according to claim 24, wherein, the data communication is for one of uplink data or downlink data, and wherein the one or more processors are further configured to avoid monitoring TTIs configured for the other of uplink data or downlink data.

31. A base station for wireless communication, comprising: a memory; and one or more processors operably coupled to the memory, the memory and the one or more processors being configured to: Configure a set of transmission time intervals (TTIs) on a first frequency band with an uplink / downlink time-division duplex (TDD) pattern that is synchronized with an overlapping set of TTIs on a second frequency band, where the first frequency band is for a first type of user equipment (UE) that cannot communicate using a shortened TTI, and the second frequency band is for a second type of UE that can communicate using a shortened TTI; Transmit a first downlink control information (DCI), the first DCI scheduling the start of a data communication in a first TTI of the first set of TTIs; Wherein, the first DCI includes an indication of one of uplink data or downlink data, a UE identifier of the UE, a modulation and coding scheme MCS for the data communication, and a resource allocation for the data communication; Receiving or transmitting, at least in part based on transmitting the first DCI, a first portion of the data communication in the first TTI; Transmitting a second DCI, the second DCI scheduling a second portion of the data communication in a second TTI of the first set of TTIs, wherein the second DCI indicates that the second portion is a part of the data communication; and Wherein the second DCI further indicates one of uplink data or downlink data that is consistent with the first DCI, so that the UE can determine that the second DCI schedules the second portion of the data communication; and Wherein the MCS indication includes a plurality of TTIs of portions of the data communication, and the second DCI excludes an indication of whether the second portion is the last portion of the data communication; and Receiving or transmitting, at least in part based on transmitting the second DCI, a second portion of the data communication in the second TTI.

32. The base station according to claim 31, Wherein, The one or more processors are further configured to, if a corresponding TTI overlapping with the first TTI in the overlapping set of TTIs is configured for downlink data, configure the first TTI for downlink data, or if the corresponding TTI overlapping with the first TTI is configured for uplink data, configure the first TTI for uplink data.

33. The base station according to claim 31, Wherein, The second DCI has a format different from that of the first DCI.

34. The base station according to claim 31, Wherein, The one or more processors are further configured to send a configuration message indicating the uplink / downlink TDD pattern.

35. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising: One or more instructions that, when executed by one or more processors of a user equipment UE, cause the one or more processors to: Receive a first downlink control information DCI, the first DCI scheduling the start of a data communication in a first transmission time interval TTI on a first frequency band, wherein the first frequency band is configured with an uplink / downlink time division duplex TDD pattern synchronized with a second frequency band; Wherein, the first DCI includes an indication of one of uplink data or downlink data, a UE identifier of the UE, a modulation and coding scheme MCS for the data communication, and a resource allocation for the data communication; Receiving or transmitting, at least in part based on receiving the first DCI, a first portion of the data communication in the first TTI; Receive a second DCI, the second DCI scheduling a second portion of the data communication in a second TTI on the first frequency band, wherein the second DCI indicates that the second portion is a part of the data communication; wherein the second DCI further indicates one of uplink data or downlink data that is consistent with the first DCI, so that the UE can determine that the second DCI schedules the second part of the data communication; and wherein the MCS indication includes a plurality of TTIs of the corresponding part of the data communication, and the second DCI excludes an indication of whether the second part is the last part of the data communication; and receive or transmit a second part of the data communication in the second TTI, at least partially based on receiving the second DCI.

36. The non-transitory computer-readable medium according to claim 35, wherein, the second DCI has a format different from that of the first DCI.

37. The non-transitory computer-readable medium according to claim 35, wherein, the first frequency band is for a first type of UE that cannot communicate using shortened TTIs, and wherein the second frequency band is for a second type of UE that can communicate using shortened TTIs.

38. The non-transitory computer-readable medium according to claim 35, wherein, the UE has a reduced feature set compared to a UE communicating using the second frequency band.

39. The non-transitory computer-readable medium according to claim 35, wherein the one or more instructions further cause the one or more processors to monitor a third DCI on the first frequency band, at least partially based on a determination that the second part is not the last part of the data communication.

40. The non-transitory computer-readable medium according to claim 35, wherein, the one or more instructions further cause the one or more processors to receive a configuration message indicating the uplink / downlink TDD pattern.

41. The non-transitory computer-readable medium according to claim 35, wherein, the data communication is for one of uplink data or downlink data, and wherein the one or more instructions further cause the one or more processors to avoid monitoring TTIs configured for the other of uplink data or downlink data.

42. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising: one or more instructions that, when executed by one or more processors of a base station, cause the one or more processors to: configure a set of transmission time intervals (TTIs) on a first frequency band with an uplink / downlink time-division duplex (TDD) pattern, the uplink / downlink time-division duplex (TDD) pattern being synchronized with an overlapping set of TTIs on a second frequency band, wherein the first frequency band is for a first type of user equipment (UE) that cannot communicate using shortened TTIs, and the second frequency band is for a second type of UE that can communicate using shortened TTIs; transmit a first downlink control information (DCI), the first DCI scheduling the start of a data communication in a first TTI of the first set of TTIs Wherein, the first DCI includes an indication of one of uplink data or downlink data, a UE identifier of the UE, a modulation and coding scheme MCS for the data communication, and a resource allocation for the data communication; Receive or transmit a first portion of the data communication in the first TTI, at least in part based on transmitting the first DCI; Transmit a second DCI, the second DCI scheduling a second portion of the data communication in a second TTI of the first set of TTIs, wherein the second DCI indicates that the second portion is part of the data communication; and Wherein the second DCI further indicates one of uplink data or downlink data that is consistent with the first DCI, so that the UE can determine that the second DCI schedules the second portion of the data communication; and Wherein the MCS indication includes a plurality of TTIs that are part of the data communication, and the second DCI excludes an indication of whether the second portion is the last portion of the data communication; and Receive or transmit a second portion of the data communication in the second TTI, at least in part based on transmitting the second DCI.

43. The non-transitory computer-readable medium according to claim 42, Wherein, The one or more instructions further cause the one or more processors to: configure the first TTI for downlink data if a corresponding TTI overlapping with the first TTI in the overlapping set of TTIs is configured for downlink data, or configure the first TTI for uplink data if the corresponding TTI overlapping with the first TTI is configured for uplink data.

44. The non-transitory computer-readable medium according to claim 42, Wherein, The second DCI has a format different from that of the first DCI.

45. The non-transitory computer-readable medium according to claim 42, Wherein, The one or more instructions further cause the one or more processors to send a configuration message indicating the uplink / downlink TDD pattern.

46. An apparatus for wireless communication, Comprising: Components for receiving a first downlink control information DCI, the first DCI scheduling the start of a data communication in a first transmission time interval TTI on a first frequency band, wherein the first frequency band is configured with an uplink / downlink time division duplex TDD pattern synchronized with a second frequency band; Wherein, the first DCI includes an indication of one of uplink data or downlink data, an identifier of the apparatus, a modulation and coding scheme MCS for the data communication, and a resource allocation for the data communication; Components for receiving or transmitting a first portion of the data communication in the first TTI, at least in part based on receiving the first DCI; Components for receiving a second DCI, the second DCI scheduling a second portion of the data communication in a second TTI on the first frequency band, wherein the second DCI indicates that the second portion is part of the data communication; wherein the second DCI further indicates one of uplink data or downlink data that is consistent with the first DCI, so that the device can determine that the second DCI schedules the second part of the data communication; and wherein the MCS indication includes a plurality of TTIs of the corresponding part of the data communication, and the second DCI excludes an indication of whether the second part is the last part of the data communication; and a component for receiving or transmitting a second part of the data communication in the second TTI at least partially based on receiving the second DCI.

47. The device according to claim 46, wherein, the second DCI has a format different from that of the first DCI.

48. The device according to claim 46, wherein, the first frequency band is for a first type of UE that cannot communicate using shortened TTIs, and wherein the second frequency band is for a second type of UE that can communicate using shortened TTIs.

49. The device according to claim 46, wherein, the UE has a reduced feature set compared to a UE communicating using the second frequency band.

50. The device according to claim 46, further comprising a component for monitoring a third DCI on the first frequency band at least partially based on a determination that the second part is not the last part of the data communication.

51. The device according to claim 46, further comprising a component for receiving a configuration message indicating the uplink / downlink TDD pattern.

52. The device according to claim 46, wherein, the data communication is for one of uplink data or downlink data, and wherein the device further comprises a component for avoiding monitoring TTIs configured for the other of the uplink data or downlink data.

53. A device for wireless communication, comprising: a component for configuring a set of transmission time intervals (TTIs) on a first frequency band with an uplink / downlink time division duplex (TDD) pattern, the uplink / downlink time division duplex (TDD) pattern being synchronized with an overlapping set of TTIs on a second frequency band, wherein the first frequency band is for a first type of user equipment (UE) that cannot communicate using shortened TTIs, and the second frequency band is for a second type of UE that can communicate using shortened TTIs; a component for transmitting a first downlink control information (DCI), the first DCI scheduling the start of a data communication in a first TTI of the first set of TTIs; wherein the first DCI includes an indication of one of uplink data or downlink data, a UE identifier of the UE, a modulation and coding scheme (MCS) for the data communication, and a resource allocation for the data communication; a component for receiving or transmitting a first part of the data communication in the first TTI at least partially based on transmitting the first DCI. A component for transmitting a second DCI, the second DCI scheduling a second part of the data communication in a second TTI of the first TTI set, wherein the second DCI indicates that the second part is part of the data communication; and wherein the second DCI further indicates one of the uplink data or downlink data consistent with the first DCI, so that the UE can determine that the second DCI schedules the second part of the data communication; and wherein the MCS indication includes a plurality of TTIs of parts of the data communication, and the second DCI excludes an indication of whether the second part is the last part of the data communication; and A component for receiving or transmitting a second part of the data communication in the second TTI at least partially based on transmitting the second DCI.

54. The apparatus according to claim 53, wherein, it further includes a component for configuring the first TTI for downlink data if a corresponding TTI overlapping with the first TTI in the overlapping TTI set is configured for downlink data, or for configuring the first TTI for uplink data if a corresponding TTI overlapping with the first TTI is configured for uplink data.

55. The apparatus according to claim 53, wherein, the second DCI has a format different from that of the first DCI.

56. The apparatus according to claim 53, further includes a component for transmitting a configuration message indicating the uplink / downlink TDD pattern.

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