Half-duplex operation in new radio frequency division duplex bands

Abstract

The UE may be configured for half-duplex communication. The access point may configure the half-duplex UE using two or more different half-duplex configurations to obtain efficient resource utilization, the two or more different half-duplex configurations including different timings of channels in different directions. The UE may determine a half-duplex configuration for communicating with the access point, each time slot of the half-duplex configuration including at least a PDCCH on a downlink frequency and an uplink short burst on an uplink frequency, and each time slot is associated with a HARQ timeline. The UE may determine the direction of the time slot. The UE may transmit or receive according to the direction of the time slot and the half-duplex configuration.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of U.S. Provisional Patent Application No. 62 / 894,527, filed on August 30, 2019, entitled “HALF-DUPLEX OPERATION IN new radio frequency division duplexing bands,” and U.S. Patent Application No. 17 / 005,195, filed on August 27, 2020, entitled “HALF-DUPLEX OPERATION IN NEW RADIO FREQUENCY DIVISION DUPLEXING BANDS,” both of which are expressly incorporated herein by reference in their entirety.

[0003] background Technical Field

[0004] The present disclosure relates generally to communication systems and, more particularly, to half-duplex communications.

[0005] introduction

[0006] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcast. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources. 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, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0007] These multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different wireless devices to communicate at city, country, region, and even global levels. An example telecommunication standard is 5G New Radio (NR). 5G NR is a part of the continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with the Internet of Things (IoT)) and other requirements. 5GNR includes services associated with enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low latency communication (URLLC). Some aspects of 5G NR can be based on 4G Long Term Evolution (LTE) standards. There is a need for further improvements to 5G NR technology. These improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies.

[0008] Overview

[0009] A brief summary of one or more aspects is given below to provide a basic understanding of such aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be presented later.

[0010] In full-duplex (FD) communication, a device can transmit and receive concurrently. For example, in frequency division duplex (FDD) communication, a device can transmit on a first frequency and receive on a second frequency concurrently. Compared with FD communication, half-duplex (HD) communication for user equipment (UE) can reduce device complexity and device cost. For example, the device may not require a duplexer for each FDD band, which can reduce the complexity of multi-band support. However, without special configuration, HD communication may not utilize resources efficiently.

[0011] When operating in the FDD band, the UE may be configured for half-duplex communication. The access point may configure a half-duplex UE (e.g., a UE configured for half-duplex communication) using two or more different half-duplex configurations to obtain efficient resource utilization, the two or more different half-duplex configurations including different timing of channels in different directions. The UE may determine a half-duplex configuration for communicating with the access point, each time slot of the half-duplex configuration including at least a physical downlink control channel (PDCCH) on a downlink frequency and an uplink short burst on an uplink frequency, and each time slot is associated with a hybrid automatic repeat request (HARQ) timeline. The UE may determine the direction of the time slot. The UE may transmit or receive according to the direction of the time slot and the half-duplex configuration.

[0012] In one aspect of the present disclosure, a method, computer-readable medium, and apparatus for wireless communication at a UE are provided. The example apparatus determines, by the UE, a half-duplex configuration for communicating with an access point, each time slot of the half-duplex configuration includes at least a PDCCH on a downlink frequency and an uplink short burst on an uplink frequency, and each time slot is associated with a HARQ timeline. The example apparatus may also determine a direction of the time slot. The example apparatus may also transmit or receive according to the direction of the time slot and the half-duplex configuration.

[0013] On the other hand, a method, computer-readable medium, and apparatus (device) for wireless communication at a base station are provided. The example apparatus may configure a first UE to have a first half-duplex configuration, each time slot of the first half-duplex configuration including a first physical downlink control channel (PDCCH), a first uplink short burst, and a corresponding first hybrid automatic repeat request (HARQ) timeline. The example apparatus may also configure a second UE to have a second half-duplex configuration different from the first half-duplex configuration, each time slot of the second half-duplex configuration including a second PDCCH, a second uplink short burst, and a second HARQ timeline. Additionally, the example apparatus indicates a first direction to the first UE and a second direction to the second UE for the time slot. The example apparatus also transmits a first grant for a first transmission block on a first PDCCH of the first UE within the time slot and transmits a second grant for a second transmission block on a second PDCCH of the second UE. Additionally, the example apparatus transmits or receives a first transmission block and a second transmission block according to the first grant and the second grant within the time slot or a subsequent time slot. Furthermore, the example apparatus transmits a retransmission request on a first PDCCH or a second PDCCH or receives an acknowledgement or a negative acknowledgement on a first uplink short burst or a second uplink short burst for a first transport block and a second transport block according to a first HARQ timeline or a second HARQ timeline, respectively.

[0014] To achieve the foregoing and related ends, the one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and drawings set forth in detail certain illustrative features of the one or more aspects. However, these features are merely indicative of several of the various ways in which the principles of the various aspects may be employed, and this description is intended to cover all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0017] Figure 2A is a diagram illustrating an example of a first frame according to various aspects of the present disclosure.

[0018] Figure 2B is a diagram illustrating an example of DL channels within a subframe according to various aspects of the present disclosure.

[0019] Figure 2C is a diagram illustrating an example of a second frame according to various aspects of the present disclosure.

[0020] Figure 2D is a diagram illustrating an example of UL channels within a subframe according to various aspects of the present disclosure.

[0021] Figure 3 is a diagram illustrating an example of a base station and a UE in an access network.

[0022] Figure 4 is a diagram of an example half-duplex configuration for a UE.

[0023] Figure 5 For access points Figure 4 FIG. 1 is a diagram of an example half-duplex configuration.

[0024] Figure 6 is a diagram illustrating different half-duplex configurations for a UE.

[0025] Figure 7 It is for Figure 6 Schematic diagram of the HARQ timeline for different half-duplex configurations.

[0026] Fig. 8A and Figure 8B An example of demodulation reference signal (DMRS) bundling is illustrated.

[0027] Fig. 9 is a flow chart of a method of wireless communication at a UE according to the teachings disclosed herein.

[0028] Fig.10 is a diagram illustrating an example of a hardware implementation for an example device according to the teachings disclosed herein.

[0029] Fig.11 is a flow chart of a method of wireless communication at an access point according to the teachings disclosed herein.

[0030] Fig.12 is a diagram illustrating an example of a hardware implementation for an example device according to the teachings disclosed herein.

[0031] Detailed Description

[0032] The detailed description set forth below in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. This detailed description includes specific details to provide a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form in order to avoid diluting such concepts.

[0033] Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0034] As an example, an element, or any part of an element, or any combination of elements may be implemented as a "processing system" including one or more processors. Examples of processors include: microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gating logic, discrete hardware circuits, and other suitable hardware configured to perform various functionalities described throughout this disclosure. One or more processors in a processing system may execute software. Software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether it is described in software, firmware, middleware, microcode, hardware description languages, or other terms.

[0035] Accordingly, in one or more example embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, each function may be stored or encoded as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media. Storage media may be any available medium that can be accessed by a computer. As an example and not limitation, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, a combination of the aforementioned types of computer-readable media, or any other medium that can be used to store instructions or data structures in the form of computer executable code that can be accessed by a computer.

[0036] Figure 11 is a diagram illustrating an example of a wireless communication system and an access network 100 including a base station 102 / 180 and a UE 104. Some wireless communications may only support full-duplex (FD) UEs in an FDD band. By enabling half-duplex (HD) UE operation, for example, in an NR FDD band, UE complexity can be significantly reduced. For example, a duplexer per FDD band may not be required in a half-duplex UE. Accordingly, half-duplex communication can provide significant UE complexity reduction in multi-band support. Half-duplex communication can reuse the concept of a TDD HARQ timeline. Additionally, the UE baseband implementation for TDD can be reused. Half-duplex communication may be useful for low-capability UEs (or NR light UEs), which may be referred to as low-end UEs (e.g., smart wearable devices, video surveillance devices, IoT devices, etc.).

[0037] The example techniques disclosed herein enable HD UE operation by reusing the FDD frame structure and TDD-like HARQ timeline. Access points (e.g., base stations 102 / 180, relays, etc.) may operate in full-duplex mode or half-duplex mode in the FDD band. HD UEs (e.g., UE 104) may be a new UE category for (per band) HD-FDD duplex mode. New Tx / Rx RF requirements (e.g., maximum output power, aggregate power control margin, frequency error, etc.) may be defined for HD UEs.

[0038] In some examples, a wireless communication device (such as UE 104) can be configured to manage one or more aspects of wireless communication by facilitating half-duplex operation in an FDD band. Figure 1 , UE 104 may include a half-duplex component 199 configured to perform half-duplex communication. For example, the half-duplex component 199 may include a configuration component 1042 configured to determine a half-duplex configuration for communicating with an access point (e.g., base station 102, gNB 180, or relay device), each time slot of the half-duplex configuration including at least a physical downlink control channel (PDCCH) on a downlink frequency and an uplink short burst on an uplink frequency, and each time slot is associated with a hybrid automatic repeat request (HARQ) timeline. In one aspect, the half-duplex configuration is different from a second half-duplex configuration of another UE. The half-duplex component 199 may include a direction component 1044 configured to determine a direction of the time slot. The half-duplex component 199 may include a communication component 1046 configured to transmit or receive according to the direction of the time slot and the half-duplex configuration.

[0039] In certain aspects, the base station 102 / 180 may include an HD control component 198 configured to perform half-duplex communication with a UE. The HD control component 198 may be configured to configure a first UE to have a first half-duplex configuration, each time slot of the first half-duplex configuration including a first physical downlink control channel (PDCCH), a first uplink short burst, and a corresponding first hybrid automatic repeat request (HARQ) timeline. The HD control component 198 may be configured to configure a second UE to have a second half-duplex configuration different from the first half-duplex configuration, each time slot of the second half-duplex configuration including a second PDCCH, a second uplink short burst, and a second HARQ timeline. The HD control component 198 may be configured to indicate a first direction to the first UE and a second direction to the second UE for a time slot. The HD control component 198 may also be configured to transmit a first grant for a first transport block on a first PDCCH of the first UE and a second grant for a second transport block on a second PDCCH of the second UE within the time slot. The HD control component 198 may be configured to transmit or receive the first transport block and the second transport block according to the first grant and the second grant in the time slot or the subsequent time slot. The HD control component 198 may be configured to transmit a retransmission request on the first PDCCH or the second PDCCH or receive an acknowledgement or a negative acknowledgement on the first uplink short burst or the second uplink short burst for the first transport block and the second transport block according to the first HARQ timeline or the second HARQ timeline, respectively.

[0040] Although the following description may focus on 5G NR, the concepts described herein may be applicable to other similar areas such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0041] The wireless communication system (also referred to as a wireless wide area network (WWAN)) includes a base station 102, a UE 104, an evolved packet core (EPC) 160, and another core network 190 (e.g., a 5G core (5GC)). The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell (a low-power cellular base station). A macro cell includes a base station. A small cell includes a femto cell, a pico cell, and a micro cell.

[0042] The base station 102 configured for 4G LTE (collectively referred to as the Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can interface with the EPC 160 via a first backhaul link 132 (e.g., an S1 interface). The base station 102 configured for 5G NR (collectively referred to as the Next Generation RAN (NG-RAN)) can interface with the core network 190 via a second backhaul link 184. Among other functions, the base station 102 can also perform one or more of the following functions: delivery of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment tracking, RAN information management (RIM), paging, positioning, and delivery of alert messages. The base stations 102 may communicate with each other directly or indirectly (eg, through the EPC 160 or the core network 190) over a third backhaul link 134 (eg, an X2 interface). The first backhaul link 132, the second backhaul link 184, and the third backhaul link 134 may be wired or wireless.

[0043] Base stations 102 may communicate wirelessly with UEs 104. Each base station 102 may provide communication coverage for a respective geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, a small cell 102' may have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network that includes both small cells and macro cells may be referred to as a heterogeneous network. A heterogeneous network may also include a home evolved Node B (eNB) (HeNB), which may provide services to a restricted group referred to as a closed subscriber group (CSG). A communication link 120 between a base station 102 and a UE 104 may include an uplink (UL) (also referred to as a reverse link) transmission from the UE 104 to the base station 102 and / or a downlink (DL) (also referred to as a forward link) transmission from the base station 102 to the UE 104. The communication link 120 may use multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. These communication links may be over one or more carriers. For each carrier allocated in a carrier aggregation of up to Yx MHz (x component carriers) for transmission in each direction, the base station 102 / UE 104 may use a spectrum of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400 MHz, etc.) bandwidth. These carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated to DL compared to UL). The component carrier may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell), and the secondary component carrier may be referred to as a secondary cell (SCell).

[0044] Some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use DL / UL WWAN spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). The D2D communication may be through a variety of wireless D2D communication systems, such as, for example, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.

[0045] The wireless communication system may further include a Wi-Fi access point (AP) 150 in communication with a Wi-Fi station (STA) 152 via a communication link 154, e.g., in a 5 GHz unlicensed spectrum, etc. When communicating in an unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) prior to communication to determine whether the channel is available.

[0046] The small cell 102' may operate in a licensed and / or unlicensed spectrum. When operating in an unlicensed spectrum, the small cell 102' may employ NR and use the same unlicensed spectrum (e.g., 5 GHz, etc.) as used by the Wi-Fi AP 150. The small cell 102' employing NR in the unlicensed spectrum may boost the coverage of the access network and / or increase the capacity of the access network.

[0047] The electromagnetic spectrum is typically subdivided into various classes, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz–7.125 GHz) and FR2 (24.25 GHz–52.6 GHz). Frequencies between FR1 and FR2 are typically referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is typically (interchangeably) referred to as the “sub-6 GHz” band in various documents and articles. Similar naming issues sometimes arise with respect to FR2, which is typically (interchangeably) referred to as the “millimeter wave” band in various documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as the “millimeter wave” band by the International Telecommunication Union (ITU).

[0048] In view of the above aspects, unless otherwise specifically stated, it should be understood that if used in this article, the term "sub-6 GHz" and the like can broadly represent frequencies that can be less than 6 GHz, can be within FR1, or can include mid-band frequencies. In addition, unless otherwise specifically stated, it should be understood that if used in this article, the term "millimeter wave" and the like can broadly represent frequencies that can include mid-band frequencies, can be within FR2, or can be within the EHF band.

[0049] Whether a small cell 102' or a large cell (e.g., a macro base station), the base station 102 may include and / or be referred to as an eNB, a gB node (gNB), or another type of base station. Some base stations (such as gNB 180) may operate in the traditional sub-6 GHz spectrum, in millimeter wave frequencies, and / or near millimeter wave frequencies to communicate with UE 104. When gNB 180 operates in millimeter wave frequencies or near millimeter wave frequencies, gNB 180 may be referred to as a millimeter wave base station. Millimeter wave base station 180 may utilize beamforming 182 with UE 104 to compensate for path loss and short range. Base station 180 and UE 104 may each include multiple antennas, such as antenna elements, antenna panels, and / or antenna arrays to facilitate beamforming.

[0050] Base station 180 may transmit beamformed signals to UE 104 in one or more transmit directions 182'. UE 104 may receive beamformed signals from base station 180 in one or more receive directions 182". UE 104 may also transmit beamformed signals to base station 180 in one or more transmit directions. Base station 180 may receive beamformed signals from UE 104 in one or more receive directions. Base station 180 / UE 104 may perform beam training to determine the best receive direction and transmit direction for each of base station 180 / UE 104. The transmit direction and receive direction of base station 180 may be the same or may be different. The transmit direction and receive direction of UE 104 may be the same or may be different.

[0051] The EPC 160 may include a mobility management entity (MME) 162, other MMEs 164, a serving gateway 166, a multimedia broadcast multicast service (MBMS) gateway 168, a broadcast multicast service center (BM-SC) 170, and a packet data network (PDN) gateway 172. The MME 162 may be in communication with a home subscriber server (HSS) 174. The MME 162 is a control node that handles signaling between the UE 104 and the EPC 160. In general, the MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are delivered through the serving gateway 166, which itself is connected to the PDN gateway 172. The PDN gateway 172 provides UE IP address allocation and other functions. The PDN gateway 172 and the BM-SC 170 are connected to IP services 176. The IP services 176 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a PS streaming service, and / or other IP services. The BM-SC 170 may provide functionality for MBMS user service provisioning and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS transmissions, may be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions. The MBMS gateway 168 may be used to distribute MBMS traffic to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area that broadcasts a specific service, and may be responsible for session management (start / stop) and for collecting eMBMS-related charging information.

[0052] The core network 190 may include an access and mobility management function (AMF) 192, other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) 195. The AMF 192 may be in communication with a unified data management (UDM) 196. The AMF 192 is a control node that handles signaling between the UE 104 and the core network 190. In general, the AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) packets are delivered through the UPF 195. The UPF 195 provides UE IP address allocation and other functions. The UPF 195 is connected to an IP service 197. The IP service 197 may include the Internet, an intranet, an IP multimedia subsystem (IMS), a packet switching (PS) streaming (PSS) service, and / or other IP services.

[0053] A base station may include and / or be referred to as a gNB, a Node B, an eNB, an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmission reception point (TRP), or some other suitable term. Base station 102 provides an access point to EPC 160 or core network 190 for UE 104. Examples of UE 104 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a tablet device, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a health care device, an implant, a sensor / actuator, a display, or any other similar functional device. Some UEs 104 may be referred to as IoT devices (e.g., parking meters, gas pumps, ovens, vehicles, heart monitors, etc.). UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.

[0054] Figure 2A 200 is a diagram illustrating an example of a first subframe within a 5G / NR frame structure. Figure 2B is a diagram 230 illustrating an example of DL channels within a 5G NR subframe. Figure 2C 250 is a diagram illustrating an example of a second subframe within a 5G NR frame structure. Figure 2D 280 is a diagram illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure can be frequency division duplex (FDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to DL or UL; or can be time division duplex (TDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to both DL and UL. Figure 2A , 2CIn the example provided, the 5G NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (mostly DL) and subframe 3 is configured with slot format 1 (all UL), where D is DL, U is UL, and F is for flexible use between DL / UL. Although subframes 3 and 4 are shown as having slot formats 1 and 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are full DL and full UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols. The UE is configured with a slot format (dynamically configured by DL control information (DCI) or semi-statically / statically configured by radio resource control (RRC) signaling) through the received slot format indicator (SFI). Note that the following description also applies to the 5G NR frame structure for TDD.

[0055] Other wireless communication technologies may have different frame structures and / or different channels. A frame (10ms) may be divided into 10 equally sized subframes (1ms). Each subframe may include one or more time slots. A subframe may also include mini-slots, which may include 7, 4, or 2 symbols. Each time slot may include 7 or 14 symbols, depending on the time slot configuration. For time slot configuration 0, each time slot may include 14 symbols, and for time slot configuration 1, each time slot may include 7 symbols. The symbols on the DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols. The symbols on the UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also known as single carrier frequency division multiple access (SC-FDMA) symbols) (for power-limited scenarios; limited to single stream transmission). The number of time slots within a subframe is based on the time slot configuration and parameter design. For slot configuration 0, different parameter designs μ of 0 to 4 allow 1, 2, 4, 8, and 16 slots per subframe, respectively. For slot configuration 1, different parameter designs 0 to 2 allow 2, 4, and 8 slots per subframe, respectively. Accordingly, for slot configuration 0 and parameter design μ, there are 14 symbols per slot and 2 per subframe. μ time slots. The subcarrier spacing and symbol length / duration vary depending on parameter design. The subcarrier spacing can be equal to 2 μ *15kHz, where μ is parameter design 0 to 4. Thus, parameter design μ=0 has a subcarrier spacing of 15kHz, while parameter design μ=4 has a subcarrier spacing of 240kHz. The symbol length / duration is inversely related to the subcarrier spacing. Figures 2A-2DAn example of slot configuration 0 with 14 symbols per slot and parameter design μ=2 and 4 slots per subframe is provided. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is about 16.67 μs. Within a frame set, there may be one or more different bandwidth parts (BWPs) that are frequency division multiplexed (see Figure 2B ). Each BWP may have a specific parameter design.

[0056] A resource grid may be used to represent the frame structure. Each slot includes a resource block (RB) (also called a physical RB (PRB)) extending over 12 consecutive subcarriers. The resource grid is divided into a number of resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0057] like Figure 2A As illustrated in FIG, some REs carry reference (pilot) signals (RS) for UEs. RSs may include demodulation RSs (DM-RSs) (indicated as R for one particular configuration, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RSs) for channel estimation at the UE. RSs may also include beam measurement RSs (BRSs), beam refinement RSs (BRRSs), and phase tracking RSs (PT-RSs).

[0058] Figure 2BAn example of various DL channels within a subframe of a frame is illustrated. A physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs), each CCE including 6 RE groups (REGs), each REG including 12 consecutive REs in an OFDM symbol of an RB. A PDCCH within a BWP may be referred to as a control resource set (CORESET). The UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., a common search space, a UE-specific search space) during a PDCCH monitoring opportunity on a CORESET, wherein the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at higher and / or lower frequencies across the channel bandwidth. A primary synchronization signal (PSS) may be within symbol 2 of a particular subframe of a frame. The PSS is used by UE 104 to determine subframe / symbol timing and physical layer identity. A secondary synchronization signal (SSS) may be within symbol 4 of a particular subframe of a frame. The SSS is used by the UE to determine the physical layer cell identity group number and the radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the location of the aforementioned DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block (also referred to as an SS block (SSB)). The MIB provides the number of RBs in the system bandwidth, and the system frame number (SFN). The physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted via the PBCH (such as a system information block (SIB)), and paging messages.

[0059] As in Figure 2C As explained in , some REs carry DM-RSs for channel estimation at the base station (indicated as R for one specific configuration, but other DM-RS configurations are possible). The UE may transmit DM-RSs for the physical uplink control channel (PUCCH) and DM-RSs for the physical uplink shared channel (PUSCH). The PUSCH DM-RS may be transmitted in the first or first two symbols of the PUSCH. The PUCCH DM-RS may be transmitted in different configurations depending on whether a short PUCCH or a long PUCCH is transmitted and on the specific PUCCH format used. The UE may transmit a sounding reference signal (SRS). The SRS may be transmitted in the last symbol of the subframe. The SRS may have a comb structure, and the UE may transmit the SRS on one of the comb teeth. The SRS may be used by the base station for channel quality estimation to enable frequency-dependent scheduling on the UL.

[0060] Figure 2DAn example of various UL channels within a subframe of an illustration frame. The PUCCH may be located at a position as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), and hybrid automatic repeat request (HARQ) ACK / NACK feedback. The PUSCH carries data and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0061] Figure 3 3 is a block diagram of a base station 310 in communication with a UE 350 in an access network. In the DL, IP packets from the EPC 160 may be provided to a controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a media access control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration of UE measurement reports; PDCP layer functionality associated with header compression / decompression, security (ciphering, cipher decryption, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with delivery of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0062] The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1, including the physical (PHY) layer, may include error detection on the transport channel, forward error correction (FEC) encoding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 handles the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The coded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time domain and / or frequency domain, and then combined together using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to generate multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine coding and modulation schemes and for spatial processing. The channel estimates may be derived from reference signals and / or channel condition feedback transmitted by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX may modulate an RF carrier with a corresponding individual spatial stream for transmission.

[0063] At the UE 350, each receiver 354RX receives a signal through its respective antenna 352. Each receiver 354RX recovers the information modulated onto the RF carrier and provides the information to a receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions. The RX processor 356 may perform spatial processing on the information to recover any spatial stream destined for the UE 350. If there are multiple spatial streams destined for the UE 350, they may be combined into a single OFDM symbol stream by the RX processor 356. The RX processor 356 then transforms the OFDM symbol stream from the time domain to the frequency domain using a fast Fourier transform (FFT). The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, as well as the reference signal, are recovered and demodulated by determining the signal constellation point most likely transmitted by the base station 310. These soft decisions may be based on channel estimates calculated by the channel estimator 358. These soft decisions are then decoded and deinterleaved to recover the data and control signals originally transmitted on the physical channel by the base station 310. These data and control signals are then provided to the controller / processor 359 which implements layer 3 and layer 2 functionality.

[0064] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport channels and logical channels, packet reassembly, cipher interpretation, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller / processor 359 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0065] Similar to the functionality described in conjunction with DL transmissions performed by the base station 310, the controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functionality associated with header compression / decompression, and security (encryption, decryption, integrity protection, integrity verification); RLC layer functionality associated with delivery of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing MAC SDUs onto TBs, demultiplexing MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0066] Channel estimates derived by a channel estimator 358 from a reference signal or feedback transmitted by the base station 310 may be used by a TX processor 368 to select the appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0067] UL transmissions are processed at the base station 310 in a manner similar to that described in conjunction with the receiver functionality at the UE 350. Each receiver 318RX receives a signal through its respective antenna 320. Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to a RX processor 370.

[0068] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport channels and logical channels, packet reassembly, cipher decoding, header decompression, control signal processing to recover IP packets from the UE 350. The IP packets from the controller / processor 375 may be provided to the EPC 160. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0069] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform operations related to Figure 1 The half-duplex component 199 combines various aspects.

[0070] At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to perform operations related to Figure 1 The HD control component 198 combines various aspects.

[0071] Some wireless communications may support only full-duplex (FD) UEs in the FDD band. By enabling HD UE operation in the NR FDD band, for example, UE complexity can be significantly reduced. For example, a duplexer per FDD band may not be required in a half-duplex UE. Accordingly, half-duplex communication can provide significant UE complexity reduction in multi-band support. In some examples, half-duplex communication can reuse the concept of TDD HARQ timeline. Additionally, the UE baseband implementation for TDD can be reused. Half-duplex communication may be useful for low-capability UEs, which may be referred to as low-end UEs (e.g., smart wearable devices, video surveillance devices, IoT devices, etc.).

[0072] The example techniques disclosed herein enable HD UE operation by reusing the FDD frame structure and TDD-like HARQ timeline. An access point (e.g., base station 102, gNB 180, or relay) may operate in full-duplex mode or half-duplex mode in an FDD band. HD UE may be a new UE category for (per band) HD-FDD duplex mode. New Tx / RxRF requirements (e.g., maximum output power, aggregate power control margin, frequency error, etc.) may be defined for HD UEs.

[0073] Go to Figure 4, the baseline HARQ timeline design 400 may be used for a first HDUE 402 having three downlink HARQ processes and a second HD UE 404 having three uplink HARQ processes. The first HD UE 402 may receive a DL grant 412 for a first HARQ process (e.g., process 0) on a PDCCH 410 in a first time slot 450. The DL grant 412 may indicate a transport block 420 of DL data for the first HARQ process in the first time slot 450. The transport block 420 may be transmitted on a PDSCH. According to the baseline HARQ timeline design 400, the first HD UE 402 may transmit an acknowledgment (ACK) 432 or a negative acknowledgment (NACK) in a UL short burst 430 in a subsequent time slot (e.g., a second time slot 452). The UL short burst 430 may include one or more symbols designated for UL transmission. The UL short burst 430 may carry a PUSCH and may be referred to as a PUSCH. Accordingly, the first HD UE 402 may receive a DL grant 412 for the first HARQ process in a later time slot, such as the fourth time slot 454. The DL grant 412 may indicate a transport block 422, which may be a new transmission in the case of an ACK or a retransmission in the case of a NACK.

[0074] The second HD UE 404 may receive a UL grant 414 on the PDCCH 410 in the first time slot 450. The UL grant 414 may schedule a UL transport block 440 in the second time slot 452. For example, the UL transport block 440 may be transmitted on a UL long burst. The UL long burst may be a plurality of symbols designated for UL transmission. In one aspect, the UL long burst may carry a PUSCH and may be referred to as a PUSCH. In one aspect, the PUSCH and the PDSCH may share the same time domain resources (e.g., symbols), but may be frequency division duplex (FDD). However, because the HD UEs 402, 404 are configured for HD communication, each of the HD UEs 402, 404 may either transmit a PUSCH or receive a PDSCH. However, the access point may be full duplex and may, for example, transmit a PDSCH to the first UE and receive a PUSCH from the second UE in the same time slot. The access point may ACK / NACK (e.g., using a new data indicator (NDI)) the transport block 440 in a UL grant 414, which may be used for a second UL transport block 442 in a later time slot (e.g., the fifth time slot 458). Accordingly, the transport block 422 may be a new transmission in the case of an ACK or a retransmission in the case of a NACK.

[0075] Go to Figure 5The combined HARQ timeline design 500 includes ( Figure 4 The combined HARQ timeline design 500 may illustrate the access point's perspective with respect to resource utilization. For simplicity, Figure 5 The HARQ timeline for only the first DL HARQ process and the first UL HARQ process is illustrated in FIG. Additionally, only a single UL transport block 440 is illustrated.

[0076] According to the baseline HARQ timeline design 400, both the first HD UE 402 and the second HD UE 404 share the same PDCCH time domain resources (e.g., the first symbol in each slot) and the same UL short burst time domain resources (e.g., the last symbol in each slot). Because the HD UEs 402, 404 are configured for HD communication, neither of the HD UEs 402, 404 may transmit on the UL frequency during the PDCCH 410. Similarly, neither of the HD UEs 402, 404 may receive on the DL frequency during the UL short burst 430. From the perspective of an access point that may be configured for FD communication, these time domain resources may not be used. Accordingly, in one aspect, it may be desirable to improve resource utilization for communications involving HD UEs.

[0077] Figure 6 Explanation includes the use Figure 4 The first HD configuration 610 of the first HD UE 402 and the Figure 4 6. Timeline 600 of a second HD configuration 620 for a second HDUE 404 of FIG. 6. The first HD configuration 610 may include a first PDCCH 612 and a first UL short burst 616 in each slot 650. Each slot 650 may be associated with a DL direction or a UL direction and include one of a PDSCH 614 or a UL long burst 618 depending on the direction of the corresponding slot 650. The second HD configuration 620 may include a second PDCCH 622 and a second UL short burst 626 in each slot 650. Each slot 650 may have a DL direction or a UL direction and include one of a PDSCH 624 or a UL long burst 628 depending on the direction of the slot 650.

[0078] The first PDCCH 612 may have different timing than the second PDCCH 622. For example, the first PDCCH 612 may be in the second symbol of the time slot 650 and the second PDCCH 622 may be in the first symbol of the time slot 650. The PDCCH regions may be disjoint for the first PDCCH 612 and the second PDCCH 622. The first UL short burst 616 may have different timing than the second UL short burst 626. For example, the first UL short burst 616 may be in the first symbol of the time slot 650 and the second UL short burst 626 may be in the second symbol of the time slot 650. Aspects of the example timeline 600 may enable an access point (e.g., a base station 102 / 180, a relay, etc.) to divide the HD UEs into K groups, where K is an integer greater than 1. The K groups may have disjoint PDCCH regions and disjoint UL short burst regions. The K groups may have different HARQ timelines, for example, one HARQ timeline may differ from another HARQ timeline by a number of symbols. The number of symbols may be 1, 2, etc. The timing gap between uplink time slots or subframes may be fixed. The timing gap may be signaled to the UE. The timing gap may be derived, for example, from the PDCCH time domain allocation.

[0079] Go to Figure 7 , a first HARQ timeline 710 may be used for a UE configured with the first HD configuration 610, and a second HARQ timeline 730 may be used for a UE configured with the second HD configuration 620. According to the first HARQ timeline 710, a first HD UE 402 configured with the first HD configuration 610 may receive a DL grant 712 for a first HARQ process on a first PDCCH 612 in a first time slot 750. The DL grant 712 may be received during a second symbol of the time slot 750 according to the first HD configuration 610. The DL grant 712 may indicate resources for a DL transport block 714 to be transmitted on a PDSCH 614. The first HD UE 402 may transmit an ACK / NACK 716 on a first UL short burst 616 in a subsequent time slot (e.g., a third time slot 754). The ACK / NACK 716 may be transmitted during a first symbol of the time slot 754 according to the first HD configuration 610. Accordingly, in a later time slot (eg, the fourth time slot 756 ), the first HD UE 402 may receive another DL grant 712 on the first PDCCH 612 for the first HARQ process.

[0080] In an aspect, the third time slot 754 may be a UL time slot for the first HD UE 402. The first HD UE 402 may receive a UL grant 720 in the first PDCCH 612 of the second time slot 752 indicating resources for a UL transport block 722. The UL grant 720 may be transmitted on a second symbol of the second time slot 752. The first HD UE 402 may transmit the UL transport block 722 on a UL long burst 618 in the third time slot 754. In an aspect, the UL transport block 722 may also use resources (e.g., a first symbol) in a first UL short burst 616 of a fourth time slot 756. The access point may acknowledge the UL transport block 722 in the UL grant 724 on the first PDCCH 612 in the fifth time slot 758.

[0081] For the second HARQ timeline 730, the second HD UE 404 configured with the second HD configuration 620 may receive a DL grant 732 for the first HARQ process on the second PDCCH 622 in the first time slot 750. The DL grant 732 may be received during the first symbol of the time slot 750 according to the second HD configuration 620. The DL grant 732 may indicate resources for a DL transport block 734 to be transmitted on the PDSCH 624. The second HD UE 404 may transmit an ACK / NACK 736 on the second UL short burst 626 in a subsequent time slot (e.g., the third time slot 754). The ACK / NACK 736 may be transmitted during the second symbol of the time slot 754 according to the second HD configuration 620. Accordingly, in a later time slot (e.g., the fourth time slot 756), the second HD UE 404 may receive another DL grant 732 for the first HARQ process on the second PDCCH 622.

[0082] In an aspect, the third time slot 754 may be a UL time slot for the second HD UE 404. The second HD UE 404 may receive a UL grant 740 in the second PDCCH 622 of the second time slot 752 indicating resources for a UL transport block 742. The UL grant 740 may be transmitted on a first symbol of the second time slot 752. The second HD UE 404 may transmit the UL transport block 742 on a UL long burst 628 in the third time slot 754. In an aspect, the UL transport block 742 may also use resources (e.g., a second symbol) in a second UL short burst 626 of the third time slot 754. The access point may acknowledge the UL transport block 742 in the UL grant 744 on the PDCCH 622 in the fifth time slot 758.

[0083] Reference again Figure 6, each time slot 650 of the HD configuration can have a direction of DL or UL. The direction can refer to the direction of the resources associated with the transport block within the time slot and whether to utilize PDSCH 614 or UL long burst 618. In one aspect, the direction of the time slot can be semi-statically configured for each UE. For example, the HD configuration can define a direction pattern similar to the TDD frame structure. The direction pattern can be repeated after a number of time slots (e.g., 5 or 10 time slots). Accordingly, one or both of the HD UEs 402, 404 can determine the direction of the time slot based on the direction pattern. The access point can configure the same HD configuration but different direction patterns for different UEs. Accordingly, the access point can configure a group of HD UEs with the same HD configuration to utilize both UL frequencies and DL frequencies to obtain efficient resource utilization. The semi-static direction pattern can also prevent conflicts between different channels within a time slot.

[0084] When dynamic scheduling of one or more channels is allowed, directional conflicts may occur. For example, an access point may dynamically schedule a UE for PDSCH, PUSCH, or ACK using a grant on the PDCCH. The access point may also semi-statically configure the PDSCH, PUSCH, or ACK, for example, using semi-persistent scheduling (SPS) or configured grants (CG). PDCCH 612, 622 may be semi-statically configured by an HD configuration. Another channel, such as a channel state information report or a reference signal, may be periodic or may be semi-persistently scheduled. The access point may generally avoid conflicts in the link direction by scheduling dynamic PDSCH, PUSCH, or ACK in the same direction in a time slot with other channels. However, in one aspect, the access point may schedule conflicts to increase flexibility, for example, for high priority channels. HD UEs 402, 404 may be configured with priority rules for determining the direction of a time slot when a conflicting channel is scheduled in a time slot. In some examples, HD UEs 402, 404 may determine the time slot direction as the direction of the highest priority channel. For example, an example priority rule may define ACK / NACK as the highest priority, followed by dynamic PDSCH or PUSCH, CSI, and finally semi-persistent PDSCH, PUSCH, or ACK.

[0085] Another type of directional conflict may occur for the demodulation reference signal (DMRS). The DMRS may be transmitted on the PUSCH along with an uplink transport block. DMRS bundling may refer to transmitting the DMRS over multiple time slots for coherent combination. In the case of DMRS bundling, the PUSCH DMRS over multiple DMRS symbols are transmitted with carrier phase continuity and the same phase continuity of the precoding matrix or at least the same phase continuity of the precoding matrix. The DMRS may be coherently transmitted over different time instances (e.g., time slots). At a receiver (e.g., an access point), channel estimates from DMRS in different time instances may be coherently combined to enhance channel estimation performance. PUSCH DMRS bundling may be applied to DMRS 802 (e.g., a DMRS 804 symbol) transmitted together with PUSCH 804 repetitions over multiple time slots. Fig. 8A ), or a DMRS 802 transmitted together with PUSCH 806a, 806b, 806c, 806d carrying different transport blocks (as shown in Figure 8B ).

[0086] In the case where PUSCH DMRS bundling is configured for HD UEs, PUSCH DMRS bundling may conflict with periodic measurements (e.g., periodic CSI, radio resource management (RRM)) or periodic DL reception / monitoring (e.g., DL broadcast channel) that may be scheduled in an UL timeslot. In a first example, the HD UE may perform partial DMRS bundling on symbols that do not conflict with periodic measurements / DL reception. In a second example, the HD UE may perform DMRS bundling and may not perform periodic measurements / DL reception in the timeslot in the event of a conflict. In a third example, the HD UE may disable DMRS bundling and perform periodic measurements / DL reception. In a fourth example, whether PUSCH bundling may be affected may be configurable. For example, the HD configuration may indicate which option to follow. In a fifth example, the UE may perform PUSCH DMRS bundling based on the priority of the PUSCH transmission. For example, a high priority transmission (e.g., URLLC) may follow the second example, while a lower priority transmission (e.g., eMBB) may follow the first example or the third example. The priority of PUSCH may be indicated at the PHY layer (eg, using DCI size / format, DCI bit field, RNTI, CORESET or search space set index) or at the MAC layer (based on logical channel (LCH) prioritization).

[0087] Fig. 9 900 is a flow chart of a method of wireless communication. The method may be performed by a UE (eg, UE 104; device 1002). Optional aspects are illustrated with dashed lines. The method may facilitate reducing UE complexity by enabling HD UE operation in an FDD band.

[0088] At 910, the UE may receive a configuration indicating whether to transmit DMRS in a downlink timeslot, as described above in conjunction with Fig. 8A and Figure 8B For example, receiving a configuration indicating whether DMRS is to be transmitted in a downlink timeslot can be performed by a configuration component 1042 of the device 1002. For example, the configuration can be an RRC configuration message indicating whether DMRS is to be prioritized over downlink transmissions.

[0089] At 920, the UE determines a half-duplex configuration for communicating with the access point, each time slot of the half-duplex configuration includes at least a PDCCH on a downlink frequency and a UL short burst on an uplink frequency, and each time slot is associated with a HARQ timeline, such as in conjunction with Figure 6 and / or Figure 7 1042. For example, determining a half-duplex configuration for communicating with an access point can be performed by a configuration component 1042 of the device 1002. For example, the UE 104 can execute the configuration component 1042 to determine the HD configuration 610, 620 for communicating with the access point (e.g., the base station 102, the gNB 180), each time slot of the half-duplex configuration includes at least a PDCCH 612, 622 on a downlink frequency and a UL short burst 616, 626 on an uplink frequency, and each time slot is associated with a HARQ timeline 710, 730. In some examples, the configuration component 1042 can receive the HD configuration 610, 620 via an RRC configuration message. In some examples, the HD configuration 610, 620 can be one of a plurality of possible half-duplex configurations that can be assigned to one or more UEs, such that the half-duplex configuration for the UE 104 can be different from the half-duplex configuration of another UE communicating with the access point. In some examples, the half-duplex configuration may be indicated by an index into a set of half-duplex configurations defined in a standards document or specification.

[0090] At 930, the UE may determine the direction of the time slot, such as by combining Figure 6 and / or Figure 7 For example, determining the direction of the time slot can be performed by the direction component 1044 of the device 1002.

[0091] In some examples, the UE can determine the direction of the time slot at 932 based on the semi-static configuration of the UE, such as in conjunction with Figure 6 For example, the direction component 1044 can determine the direction based on the direction pattern indicated in the HD configuration. In some examples, the UE can determine the direction based on the position of the time slot within the direction pattern.

[0092] In some examples, the UE can determine the direction of each of the multiple channels based on the configuration of each of the multiple channels within the time slot at 934, such as in conjunction with Figure 6 The time slot 650 described above. For example, the direction component 1044 may be configured to determine the direction of each of the multiple channels based on the configuration of each of the multiple channels within the time slot. The multiple channels may include any channels or signals scheduled during the time slot. For example, the channel may include one or more of the following: a transport block, a PDSCH, a PUSCH, a PDCCH, a PUCCH, a CSI, or an ACK / NACK. In some examples, at least one of the multiple channels may be dynamically configured for the time slot. In some examples, the directions of one or more of the channels may conflict. For example, one channel may have an uplink direction and another channel may have a downlink direction. It can be appreciated that an HD UE may not be able to operate in both an uplink direction and a downlink direction for the same time slot.

[0093] In some examples, when two of the multiple channels are configured for different directions, the UE can determine the direction of the time slot based on a priority rule at 936. For example, the direction component 1044 can be configured to determine the direction of the time slot based on a priority rule. In some examples, the UE can select the direction of the highest priority scheduled channel as the direction of the time slot. Accordingly, the highest priority channel and other channels in the same direction can be transmitted or received during the time slot.

[0094] At 940, the UE transmits or receives according to the direction of the time slot and the half-duplex configuration, such as in combination with Figure 6 UL long burst 618, 628 or PDSCH 614, 624 described. For example, the communication component 1046 of the device 1002 can be configured to transmit or receive according to the direction and half-duplex configuration of the time slot. For the uplink direction, the UE can control the transmitter to transmit the uplink transport block on the UL long burst 618 or the UL long burst 628 depending on the HD configuration 610, 620, respectively. Conversely, for the downlink direction, the UE can control the receiver to receive the PDSCH 614 or the PDSCH 624 depending on the HD configuration 610, 620, respectively.

[0095] In an example where the UE is configured for DMRS bundling, the UE may transmit DMRS in symbols that do not conflict with downlink transport blocks or measurements, such as in conjunction with Fig. 8A and Figure 8BAs described. For example, the DMRS component 1040 of the device 1002 may be configured to transmit the DMRS in a symbol that does not conflict with a downlink transport block or measurement. For example, the UE may control the transmitter to transmit the DMRS in a symbol that does not conflict with a downlink transport block or measurement. The UE may control the receiver to receive a downlink transport block or perform a measurement in other symbols of the time slot.

[0096] In some examples, the UE may transmit the DMRS according to the priority indication of the uplink transmission, such as in conjunction with Fig. 8A and Figure 8B As described. For example, the DMRS component 1040 of the device 1002 may be configured to transmit the DMRS according to a priority indication of the uplink transmission. For example, if the uplink transmission is indicated as a priority transmission or has a priority that satisfies a threshold, the UE may control the transmitter to transmit the DMRS. The priority indication may be one of a DCI format, a DCI bit field, an RNTI, a CORESET or search space set index, or a logical channel.

[0097] Fig.101 is a diagram 1000 illustrating an example of a hardware implementation of a device 1002. The device 1002 is a UE and includes a cellular baseband processor 1004 (also referred to as a modem) coupled to a cellular RF transceiver 1022 and one or more subscriber identity modules (SIM) cards 1020, an application processor 1006 coupled to a secure digital (SD) card 1008 and a screen 1010, a Bluetooth module 1012, a wireless local area network (WLAN) module 1014, a global positioning system (GPS) module 1016, and a power supply 1018. The cellular baseband processor 1004 communicates with the UE 104 and / or the base station 102 / 180 through the cellular RF transceiver 1022. The cellular baseband processor 1004 may include a computer-readable medium / memory. The computer-readable medium / memory may be non-transitory. The cellular baseband processor 1004 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory. The software, when executed by the cellular baseband processor 1004, causes the cellular baseband processor 1004 to perform the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by the cellular baseband processor 1004 when executing the software. The cellular baseband processor 1004 further includes a receiving component 1030, a communication manager 1032, and a transmission component 1034. The communication manager 1032 includes one or more of the illustrated components. The components within the communication manager 1032 may be stored in a computer-readable medium / memory and / or configured as hardware within the cellular baseband processor 1004. The cellular baseband processor 1004 may be a component of the UE 350 and may include a memory 360 and / or at least one of the following: a TX processor 368, an RX processor 356, and a controller / processor 359. In one configuration, the device 1002 may be a modem chip and include only the baseband processor 1004, and in another configuration, the device 1002 may be the entire UE (e.g., see Figure 3 UE 350) and includes the aforementioned additional modules of device 1002.

[0098] The communication manager 1032 includes a DMRS component 1040, which is configured to transmit DMRS in symbols that do not conflict with downlink transmission blocks or measurements, and / or transmit DMRS according to a priority indication of uplink transmissions, for example, as combined with Fig. 9 942 and / or 944. The communication manager 1032 further includes a configuration component 1042 that facilitates determining an HD configuration, for example, as described in conjunction with Fig. 9 910 and / or 920. The communication manager 1032 further includes a direction component 1044 that facilitates determining the direction of the time slot, for example, as described in conjunction with Fig. 9930, 932, 934 and / or 936. The communication manager 1032 further includes a communication component 1046 that facilitates transmitting a UL transport block or receiving a DL transport block, for example, as described in conjunction with Fig. 9 of 940 as described.

[0099] The apparatus may include executing Fig. 9 The additional components of each box of the algorithm in the preceding flowchart. Thus, Fig. 9 Each block in the aforementioned flow chart of can be performed by a component and the device may include one or more of those components. These components can be one or more hardware components specially configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0100] In one configuration, the device 1002, and in particular the cellular baseband processor 1004, includes means for determining, by the UE, a half-duplex configuration for communicating with an access point, each time slot of the half-duplex configuration including at least a PDCCH on a downlink frequency and an uplink short burst on an uplink frequency, and each time slot is associated with a HARQ timeline. The example device 1002 may also include means for determining a direction of the time slot. The example device 1002 may also include means for transmitting or receiving according to the direction of the time slot and the half-duplex configuration. The example device 1002 may also include means for transmitting DMRS across multiple time slots, wherein transmitting or receiving according to the direction of the time slot and the half-duplex configuration is further based on the DMRS of the time slot.

[0101] The aforementioned means may be one or more of the aforementioned components in the device 1002 configured to perform the functions recited by the aforementioned means. As described above, the device 1002 may include the TX processor 368, the RX processor 356, and the controller / processor 359. Thus, in one configuration, the aforementioned means may be the TX processor 368, the RX processor 356, and the controller / processor 359 configured to perform the functions recited by the aforementioned means.

[0102] Fig.11 1100 is a flow chart of a method of wireless communication. The method may be performed by a base station (eg, base station 102 / 180; device 1202). Optional aspects are illustrated with dashed lines. The method may facilitate reducing UE complexity by enabling HD UE operation in an FDD band.

[0103] At 910, the base station configures the first UE to have a first half-duplex configuration, each time slot of the first half-duplex configuration includes a first PDCCH, a first uplink short burst, and a corresponding first HARQ timeline, such as in combination with e.g. Figure 4 and Figure 6 1202 and the first HD configuration 610. For example, the configuration component 1244 of the device 1202 can be configured to configure the first UE to have a first half-duplex configuration. For example, the base station can configure the first HD UE 402 to have the first HD configuration 610. Each time slot 650 of the first HD configuration 610 can include a first PDCCH 612, a first uplink short burst 616, and a corresponding HARQ timeline 710.

[0104] At 1120, the base station configures at least one second UE to have a second half-duplex configuration different from the first half-duplex configuration, each time slot of the second half-duplex configuration including a second PDCCH, a second uplink short burst, and a second HARQ timeline, such as in combination with e.g. Figure 4 and Figure 6 The second HD UE 404 and the second HD configuration 620 are described. For example, the configuration component 1244 of the device 1202 can be configured to configure the second UE to have a second half-duplex configuration.

[0105] At 1130, the base station indicates a first direction to the first UE and a second direction to the second UE for a time slot, such as in conjunction with, for example Figure 7 10, 110, 110, 120, 130. For example, the indication component 1250 of the device 1202 may be configured to indicate a first direction to the first UE and a second direction to the second UE for the time slot. In some examples, the base station may indicate the corresponding direction to the UE based on the corresponding semi-static configuration of the UE. In some examples, the base station may indicate the corresponding direction to the UE based on the configuration for each of the multiple channels within the time slot.

[0106] At 1140, the base station transmits a first grant for a first transport block on a first PDCCH of a first UE and transmits a second grant for a second transport block on a second PDCCH of a second UE in the time slot, as in conjunction with, for example Figure 7712, 732 for transport blocks 714, 734 of the device 1202. For example, the grant component 1246 of the device 1202 may be configured to transmit a first grant for the first transport block on the first PDCCH of the first UE and a second grant for the second transport block on the second PDCCH of the second UE within the time slot. For example, the base station may transmit a first grant (e.g., DL grant 712) for the first transport block 714 on the first PDCCH 612 of the first HD UE 402 within the time slot and transmit a second grant (e.g., DL grant 732) for the second transport block 734 on the second PDCCH of the second UE within the time slot 750. It can be appreciated that the base station may configure other grant combinations within the time slot. For example, the base station may transmit a DL grant 716 to the first HD UE 402 and a UL grant 740 to the second UE 404 in the time slot 752. In some examples, the base station can additionally or alternatively transmit a grant to a third UE having the same first HD configuration 610 as the first HDUE 402. For example, grant component 1246 can transmit UL grant 720 in time slot 750 to the third UE.

[0107] In some examples, the base station may indicate resources for the first transport block based on the semi-static configuration of the first UE at 1142, such as in conjunction with, for example Figure 7 402. For example, the indication component 1250 of the device 1202 may be configured to indicate the resources used for the first transmission block based on the semi-static configuration of the first UE. For example, the base station may indicate the direction of the transmission block (e.g., DL transmission block 714 or UL transmission block 722) based on the semi-static configuration of the first HD UE 402. The base station may also determine the direction of the second transmission block based on the semi-static configuration of the second HD UE 404, and the semi-static configuration of the second HDUE 404 may be different from the semi-static configuration of the first HD UE 402. For example, in time slot 754, the first HDUE 402 may be configured with a DL time slot, and the second HD UE 404 may be configured with a UL time slot.

[0108] In some examples, the base station may dynamically configure at least one of the multiple channels at 1144 via downlink control information on a corresponding PDCCH, such as in conjunction with, for example Figure 6 The base station may dynamically configure at least one of the plurality of channels (e.g., PDSCH 614 or UL long burst 618) by transmitting DCI on PDCCH 612.

[0109] At 1146, the base station may indicate a first direction for the time slot based on the configuration of each of the plurality of channels for the first UE within the time slot, such as in conjunction with, for example, Figure 6 For example, the direction component 1248 of the device 1202 can be configured to indicate a first direction of the time slot based on the configuration of each of the multiple channels for the first UE in the time slot. For example, the configuration of the channel can indicate the direction.

[0110] In some examples, the base station can indicate a priority rule when two of the multiple channels are configured for different directions at 1148. For example, the direction component 1248 of the device 1202 can be configured to indicate a priority rule when two of the multiple channels are configured for different directions.

[0111] At 1150, the base station transmits or receives the first transport block and the second transport block in the time slot or a subsequent time slot according to the first grant and the second grant, such as in combination with, for example Figure 4 For example, the communication component 1254 can be configured to transmit or receive the first transmission block and the second transmission block according to the first grant and the second grant in the time slot or a subsequent time slot.

[0112] In some examples, the base station may receive DMRS from a UE across multiple time slots at 1152 and coherently combine the DMRS to estimate the channel from the UE, such as in combination with e.g. Fig. 8A and Figure 8B For example, the DMRS component 1240 of the device 1202 can be configured to receive DMRS from a UE across multiple time slots and coherently combine the DMRS to estimate a channel from the UE.

[0113] At 1160, the base station may transmit a retransmission request on the first PDCCH or the second PDCCH or receive an ACK or NACK on the first uplink short burst or the second uplink short burst for the first transport block and the second transport block according to the first HARQ timeline or the second HARQ timeline, respectively, as in combination with e.g. Figure 4412 and the transport block 422 of the DL grant ... In some examples, the base station may receive ACK 716 on UL short burst 616 or ACK 736 on UL short burst 626 .

[0114] Fig.12 1200 is an example of a hardware implementation of an illustrated device 1202. The device 1202 is a base station and includes a baseband unit 1204. The baseband unit 1204 can communicate with the UE 104 via a cellular RF transceiver. The baseband unit 1204 may include a computer-readable medium / memory. The baseband unit 1204 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory. The software, when executed by the baseband unit 1204, causes the baseband unit 1204 to perform the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by the baseband unit 1204 when executing the software. The baseband unit 1204 further includes a receiving component 1230, a communication manager 1232, and a transmission component 1234. The communication manager 1232 includes one or more of the illustrated components. The components within the communication manager 1232 may be stored in a computer-readable medium / memory and / or configured as hardware within the baseband unit 1204. The baseband unit 1204 may be a component of the base station 310 and may include a memory 376 and / or at least one of the following: the TX processor 316 , the RX processor 370 , and the controller / processor 375 .

[0115] The communication manager 1232 includes a DMRS component 1240 configured to facilitate receiving DMRS from a UE across multiple time slots and coherently combining the DMRS to estimate a channel from the UE, e.g., as combined with Fig.111152 as described. The communication manager 1232 further includes a HARQ component 1242, which can be configured to facilitate transmitting a retransmission request on the first PDCCH or the second PDCCH for the first transport block and the second transport block according to the first HARQ timeline or the second HARQ timeline, or receiving an ACK or NACK on the first uplink short burst or the second uplink short burst, for example, as combined with Fig.11 The communication manager 1232 further includes a configuration component 1244, which can be configured to facilitate configuring the first UE to have a first half-duplex configuration and configuring the second UE to have a second half-duplex configuration, for example, as described in conjunction with Fig.11 The communication manager 1232 further includes a grant component 1246, which can be configured to facilitate the transmission of a first grant for a first transport block on a first PDCCH of a first UE and a second grant for a second transport block on a second PDCCH of a second UE within the time slot, for example, as described in conjunction with Fig.11 The communication manager 1232 further includes a direction component 1248, which can be configured to facilitate indicating a first direction of the time slot based on the configuration of each of the multiple channels for the first UE within the time slot and / or indicating a priority rule when two channels of the multiple channels are configured for different directions, for example, as combined Fig.11 1146 and / or 1148. The communication manager 1232 further includes an indication component 1250, which can be configured to facilitate indicating a first direction to the first UE and a second direction to the second UE for the time slot, and / or indicating resources for the first transmission block based on a semi-static configuration of the first UE, for example, as combined with Fig.11 1130 and / or 1142 as described. The communication manager 1232 further includes a channel component 1252, which can be configured to facilitate dynamic configuration of at least one of the multiple channels via a DCI on a corresponding PDCCH, for example, as described in conjunction with Fig.11 The communication manager 1232 further includes a communication component 1254, which can be configured to facilitate the transmission or reception of the first transmission block and the second transmission block according to the first grant and the second grant in the time slot or a subsequent time slot, for example, as described in conjunction with Fig.11 1150 as described.

[0116] The apparatus may include executing Fig.11 The additional components of each box of the algorithm in the preceding flowchart. Thus, Fig.11Each block in the aforementioned flow chart of can be performed by a component and the device may include one or more of those components. These components can be one or more hardware components specially configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0117] In one configuration, the device 1202 and in particular the baseband unit 1204 includes means for configuring a first UE to have a first half-duplex configuration, each time slot of the first half-duplex configuration including a first PDCCH, a first uplink short burst, and a corresponding first HARQ timeline; and configuring a second UE to have a second half-duplex configuration different from the first half-duplex configuration, each time slot of the second half-duplex configuration including a second PDCCH, a second uplink short burst, and a second HARQ timeline. The example device 1202 may further include means for indicating a first direction to the first UE and indicating a second direction to the second UE in the time slot. The example device 1202 may further include means for transmitting a first grant for a first transport block on a first PDCCH of the first UE in the time slot and transmitting a second grant for a second transport block on a second PDCCH of the second UE in the time slot. The example device 1202 may further include means for transmitting or receiving a first transport block and a second transport block according to the first grant and the second grant in the time slot or a subsequent time slot. The example device 1202 may further include means for transmitting a retransmission request on a first PDCCH or a second PDCCH or receiving an acknowledgement or a negative acknowledgement on a first uplink short burst or a second uplink short burst for a first transport block and a second transport block according to a first HARQ timeline or a second HARQ timeline, respectively. The example device 1202 may further include means for transmitting a configuration indicating whether a DMRS is to be transmitted in a downlink timeslot to a UE.

[0118] The aforementioned means may be one or more of the aforementioned components in the device 1202 configured to perform the functions recited by the aforementioned means. As described above, the device 1202 may include the TX processor 316, the RX processor 370, and the controller / processor 375. Thus, in one configuration, the aforementioned means may be the TX processor 316, the RX processor 370, and the controller / processor 375 configured to perform the functions recited by the aforementioned means.

[0119] The following examples are merely illustrative and may be combined with other embodiments or aspects of the teachings described herein without limitation.

[0120] Example 1 is a method for performing wireless communications at a user equipment (UE), comprising: determining, by the UE, a half-duplex configuration for communicating with an access point, wherein each time slot of the half-duplex configuration includes at least a physical downlink control channel (PDCCH) on a downlink frequency and an uplink short burst on an uplink frequency, and each time slot is associated with a hybrid automatic repeat request (HARQ) timeline; determining a direction of the time slot; and transmitting or receiving according to the direction of the time slot and the half-duplex configuration.

[0121] In Example 2, the method of Example 1 further includes: the half-duplex configuration defines a timing gap between uplink time slots, a timing gap between downlink time slots, or a timing gap between an uplink time slot and a downlink time slot.

[0122] In Example 3, the method of any one of Example 1 or Example 2 further includes: the timing gap is predetermined, signaled to the UE, or derived from the timing of the PDCCH.

[0123] In Example 4, the method of any one of Examples 1 to 3 further includes: determining the direction of the time slot includes determining the direction based on a semi-static configuration of the UE.

[0124] In Example 5, the method of any one of Examples 1 to 4 further includes: determining the direction of a time slot includes: determining the direction of each of the multiple channels based on the configuration of each of the multiple channels within the time slot; and when two channels of the multiple channels are configured for different directions, determining the direction of the time slot based on a priority rule.

[0125] In Example 6, the method of any one of Examples 1 to 5 further includes: at least one of the plurality of channels is dynamically configured through downlink control information on a PDCCH.

[0126] In Example 7, the method of any one of Examples 1 to 6 further includes: the priority rule indicating a channel order.

[0127] In Example 8, the method of any one of Examples 1 to 7 further includes: the UE is configured to transmit a demodulation reference signal (DMRS) across multiple time slots, wherein transmitting or receiving the DMRS is further based on the time slot according to the direction and half-duplex configuration of the time slot.

[0128] In Example 9, the method of any one of Examples 1 to 8 further includes: the direction is downlink, and transmitting or receiving according to the direction and half-duplex configuration of the time slot includes transmitting the DMRS in a codeword that does not conflict with a downlink transmission block or measurement.

[0129] In Example 10, the method of any one of Examples 1 to 9 further includes: when the DMRS is scheduled for transmission, the direction is uplink.

[0130] In Example 11, the method of any one of Examples 1 to 10 further includes: when the direction is downlink, the UE abandons transmitting the DMRS.

[0131] In Example 12, the method of any one of Examples 1 to 11 further includes receiving a configuration indicating whether the DMRS is to be transmitted in the downlink timeslot.

[0132] In Example 13, the method of any one of Examples 1 to 12 further includes: transmitting or receiving according to the direction and half-duplex configuration of the time slot includes transmitting the DMRS according to the priority indication of the uplink transmission. In Example 14, the method of any one of Examples 1 to 13 further includes: the priority indication is one of a downlink control information (DCI) format, a DCI bit field, a radio network temporary identifier (RNTI), a control resource set (CORESET) or a search space set index, or a logical channel.

[0133] Example 15 is a device comprising one or more processors and one or more memories in electronic communication with the one or more processors, the one or more memories storing instructions executable by the one or more processors to cause a system or equipment to implement a method as in any one of Examples 1 to 14.

[0134] Example 16 is a system or an apparatus comprising means for implementing the method of any one of Examples 1 to 14 or implementing the apparatus of any one of Examples 1 to 14.

[0135] Example 17 is a non-transitory computer-readable medium storing instructions executable by one or more processors to cause the one or more processors to implement the method of any one of Examples 1 to 14.

[0136] Example 18 is a method for wireless communication at an access point, comprising: configuring a first user equipment (UE) to have a first half-duplex configuration, each time slot of the first half-duplex configuration including a first physical downlink control channel (PDCCH), a first uplink short burst, and a corresponding first hybrid automatic repeat request (HARQ) timeline; configuring a second UE to have a second half-duplex configuration different from the first half-duplex configuration, each time slot of the second half-duplex configuration including a second PDCCH, a second uplink short burst, and a second HARQ timeline; indicating a first direction to the first UE for the time slot and indicating to the first UE The second UE indicates a second direction; transmits a first grant for a first transport block on a first PDCCH of the first UE within the time slot and transmits a second grant for a second transport block on a second PDCCH of the second UE; transmits or receives the first transport block and the second transport block according to the first grant and the second grant within the time slot or a subsequent time slot; and transmits a confirmation retransmission request on the first PDCCH or the second PDCCH for the first transport block and the second transport block according to the first HARQ timeline or the second HARQ timeline, respectively, or receives a confirmation or a negative confirmation on the first uplink short burst or the second uplink short burst.

[0137] In Example 19, the method of Example 18 further includes: each half-duplex configuration defines a timing gap between uplink time slots.

[0138] In Example 20, the method of any one of Example 18 or Example 19 further includes: the timing gap is predetermined, signaled to the corresponding UE, or derived from the corresponding PDCCH timing.

[0139] In Example 21, the method of any one of Examples 18 to 20 further includes: the first grant indicates resources for the first transport block based on a semi-static configuration of the first UE, and wherein the direction is based on the semi-static configuration of the first UE.

[0140] In Example 22, the method of any one of Examples 18 to 21 further includes: the base station indicates a first direction of the time slot based on the configuration of each of a plurality of channels for the first UE within the time slot, and wherein the first direction of the time slot is based on a priority rule when two of the plurality of channels are configured for different directions.

[0141] In Example 23, the method of any one of Examples 18 to 22 further includes transmitting the first grant including dynamically configuring at least one channel of the plurality of channels through downlink control information on a corresponding PDCCH.

[0142] In Example 24, the method of any one of Examples 18 to 23 further comprises: the priority rule indicating a channel order.

[0143] In Example 25, the method of any one of Examples 18 to 24 further includes: receiving the first transport block according to the first grant includes receiving a demodulation reference signal (DMRS) from the first UE across multiple time slots and coherently combining the DMRS to estimate the channel from the first UE.

[0144] In Example 26, the method of any one of Examples 18 to 25 further includes: the first grant for the first UE in the time slot is a downlink grant, and receiving the first transport block includes receiving a DMRS in a codeword in the time slot that does not conflict with a downlink transport block or measurement.

[0145] In Example 27, the method of any one of Examples 18 to 26 further includes transmitting the first grant includes transmitting an uplink grant when the DMRS is scheduled for transmission in the time slot.

[0146] In Example 28, the method of any one of Examples 18 to 27 further includes: receiving the DMRS from the first UE across the multiple time slots includes refraining from receiving the scheduled DMRS in the time slot in response to transmitting a downlink grant for the first UE regarding the time slot.

[0147] In Example 29, the method of any one of Examples 18 to 28 further includes transmitting, to the first UE, a configuration indicating whether the DMRS is to be transmitted in the downlink timeslot.

[0148] In Example 30, the method of any one of Examples 18 to 29 further includes: receiving the DMRS from the first UE across the plurality of time slots is based on a priority indication of the corresponding transport block.

[0149] In Example 31, the method of any one of Examples 18 to 30 further includes: the priority indication is one of a downlink control information (DCI) format, a DCI bit field, a radio network temporary identifier (RNTI), a control resource set (CORESET) or a search space set index, or a logical channel.

[0150] Example 32 is a device comprising one or more processors and one or more memories in electronic communication with the one or more processors, the one or more memories storing instructions executable by the one or more processors to cause a system or equipment to implement a method as in any of Examples 18 to 31.

[0151] Example 33 is a system or apparatus comprising means for implementing a method as in any one of Examples 18 to 31 or implementing an apparatus as in any one of Examples 18 to 31.

[0152] Example 34 is a non-transitory computer-readable medium storing instructions executable by one or more processors to cause the one or more processors to implement a method as in any one of Examples 18 to 31.

[0153] It should be understood that the specific order or hierarchy of each box in the disclosed process / flowchart is an illustration of an example approach. It should be understood that the specific order or hierarchy of each box in these process / flowcharts can be rearranged based on design preferences. In addition, some boxes can be combined or omitted. The attached method claims present the elements of various boxes in an exemplary order and are not meant to be limited to the specific order or hierarchy presented.

[0154] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be easily understood by those skilled in the art, and the universal principles defined in this article can be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown in this article, but should be granted the full scope consistent with the claims in language, wherein the singular reference of the elements is not intended to represent "there is and only one", but "one or more", unless otherwise stated. Terms such as "if", "when..." and "when..." should be interpreted as meaning "under the condition", rather than implying a direct time relationship or reaction. That is, these phrases (e.g., "when...") do not imply an immediate action in response to the occurrence of an action or during the occurrence of an action, but only imply that an action will occur when the condition is met, and no specific or immediate time constraints are required for the action to occur. The wording "exemplary" is used in this article to represent "used as an example, instance, or explanation". Any aspect described as "exemplary" herein need not be interpreted as being superior to or superior to other aspects. Unless otherwise stated, the term "some / certain" refers to one or more. Combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B and C," "one or more of A, B, and C," and "A, B, C, or any combination thereof" include any combination of A, B, and / or C, and may include multiple A, multiple B, or multiple C. Specifically, combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B, and C," "one or more of A, B, and C," and "A, B, C, or any combination thereof" may be only A, only B, only C, A and B, A and C, B and C, or A and B and C, wherein any such combination may include one or more members of A, B, or C. All structural and functional equivalents to the elements of the various aspects described throughout the disclosure that are currently or later known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be covered by the claims. Furthermore, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is explicitly recited in the claims. The terms "module," "mechanism," "element," "device," etc. may not be a substitute for the term "means." Thus, no claim element should be construed as a means-plus-function unless the element is explicitly recited using the phrase "means for..."

Claims

1. A method for wireless communication at a user equipment (UE), comprising: determining, by the UE, a half-duplex configuration for communicating with an access point, wherein each time slot of the half-duplex configuration includes at least a physical downlink control channel (PDCCH) on a downlink frequency of a frequency division duplex frame structure and an uplink short burst on an uplink frequency, and each time slot is associated with a hybrid automatic repeat request (HARQ) timeline, wherein the downlink frequency is associated with a first subframe of a set of subcarriers and is dedicated to downlink traffic, and the uplink frequency is associated with a second subframe of the set of subcarriers and is dedicated to uplink traffic, and the second subframe is different from the first subframe; determining a first direction of a time slot, the first direction being different from a second direction associated with another UE of the time slot; as well as Transmitting or receiving is performed according to the first direction and the half-duplex configuration of the time slot.

2. The method of claim 1, wherein the half-duplex configuration identifies a timing gap, wherein the timing gap corresponds to a gap between uplink time slots, a gap between downlink time slots, or a gap between the uplink time slot and the downlink time slot.

3. The method of claim 2, wherein the timing gap is predetermined, signaled to the UE, or derived from the timing of the PDCCH. The method of claim 1 , wherein the first direction is based on a semi-static configuration of the UE.

5. The method of claim 1, wherein determining the first direction of the time slot comprises: determining a respective direction for each of the plurality of channels based on a configuration of each of the plurality of channels within the time slot; as well as When two channels of the plurality of channels are configured for different respective directions, the first direction of the time slot is determined based on a priority rule. 6 . The method of claim 5 , wherein at least one of the plurality of channels is configured by downlink control information on the PDCCH. The method of claim 5 , wherein the priority rule indicates a channel order.

8. The method of claim 1, wherein the UE is configured to transmit a demodulation reference signal (DMRS) across a plurality of time slots, wherein transmitting or receiving according to the first direction and the half-duplex configuration of the time slots is further based on the DMRS of the time slots.

9. The method of claim 8, wherein the first direction is downlink, and transmitting or receiving according to the first direction and the half-duplex configuration of the time slot comprises: The DMRS is transmitted in symbols that do not collide with downlink transport blocks or measurements.

10. The method of claim 8, wherein when the DMRS is scheduled for transmission, the first direction is uplink. The method of claim 8 , wherein when the first direction is a downlink, the UE abandons transmitting the DMRS.

12. The method of claim 8, further comprising receiving a configuration indicating whether the DMRS is to be transmitted in a downlink timeslot.

13. The method of claim 8, wherein transmitting or receiving according to the first direction and the half-duplex configuration of the time slot comprises: The DMRS is transmitted according to a priority indication of uplink transmission.

14. The method of claim 13, wherein the priority indication is one of a downlink control information (DCI) format, a DCI bit field, a radio network temporary identifier (RNTI), a control resource set (CORESET) or search space set index, or a logical channel.

15. The method of claim 8, wherein when the first direction of the time slot is uplink and a downlink broadcast channel is scheduled for the time slot, the UE abandons transmitting the DMRS.

16. An apparatus for wireless communication at a user equipment (UE), comprising: Memory; as well as at least one processor coupled to the memory and configured to: determining, by the UE, a half-duplex configuration for communicating with an access point, wherein each time slot of the half-duplex configuration includes at least a physical downlink control channel (PDCCH) on a downlink frequency of a frequency division duplex frame structure and an uplink short burst on an uplink frequency, and each time slot is associated with a hybrid automatic repeat request (HARQ) timeline, wherein the downlink frequency is associated with a first subframe of a set of subcarriers and is dedicated to downlink traffic, and the uplink frequency is associated with a second subframe of the set of subcarriers and is dedicated to uplink traffic, and the second subframe is different from the first subframe; determining a first direction of a time slot, the first direction being different from a second direction associated with another UE of the time slot; as well as Transmitting or receiving is performed according to the first direction and the half-duplex configuration of the time slot.

17. The apparatus of claim 16, wherein the at least one processor is further configured to perform any one of claims 2-15.

18. A method for wireless communication at an access point, comprising: configuring a first user equipment (UE) to have a first half-duplex configuration, each time slot of the first half-duplex configuration comprising a first physical downlink control channel (PDCCH) on a downlink frequency of a frequency division duplex (FDD) frame structure, a first uplink short burst on an uplink frequency of the FDD frame structure, and a first hybrid automatic repeat request (HARQ) timeline, the downlink frequency being associated with a first subframe of a set of subcarriers and dedicated for downlink traffic, the uplink frequency being associated with a second subframe of the set of subcarriers and dedicated for uplink traffic, the second subframe being different from the first subframe; configuring a second UE to have a second half-duplex configuration different from the first half-duplex configuration, each time slot of the second half-duplex configuration including a second PDCCH on the downlink frequency of the FDD frame structure, a second uplink short burst on the uplink frequency of the FDD frame structure, and a second HARQ timeline; indicating a first direction to the first UE and a second direction to the second UE for a time slot, the first direction being different from the second direction for the time slot; transmitting a first grant for a first transport block on the first PDCCH of the first UE and transmitting a second grant for a second transport block on the second PDCCH of the second UE within the time slot; transmitting or receiving the first transport block and the second transport block according to the first grant and the second grant in the time slot or a subsequent time slot; as well as A retransmission request is transmitted on the first PDCCH or the second PDCCH or an acknowledgement or a negative acknowledgement is received on the first uplink short burst or the second uplink short burst for the first transport block and the second transport block according to the first HARQ timeline or the second HARQ timeline, respectively.

19. The method of claim 18, wherein each half-duplex configuration defines a timing gap between uplink time slots.

20. The method of claim 19, wherein the timing gap is predetermined, signaled to the corresponding UE, or derived from the corresponding PDCCH timing.

21. The method of claim 18, wherein the first grant indicates resources for the first transport block based on a semi-static configuration of the first UE, and wherein the direction is based on the semi-static configuration of the first UE.

22. The method of claim 18, wherein the access point indicates a first direction of the time slot based on a configuration of each of a plurality of channels for the first UE within the time slot, and Wherein when two channels of the plurality of channels are configured for different respective directions, a first direction of the time slot is based on a priority rule.

23. The method of claim 22, wherein transmitting the first grant comprises: At least one channel among the plurality of channels is configured by downlink control information on a corresponding PDCCH.

24. The method of claim 23, wherein the priority rule indicates a channel order.

25. The method of claim 18, wherein receiving the first transport block in accordance with the first grant comprises: A demodulation reference signal (DMRS) is received from the first UE across a plurality of time slots and the DMRS is coherently combined to estimate a channel from the first UE.

26. The method of claim 25, wherein the first grant for the first UE in the time slot is a downlink grant, and receiving the first transport block comprises: The DMRS is received in a symbol in the slot that does not collide with a downlink transport block or measurement.

27. The method of claim 25, wherein transmitting the first grant comprises: When the DMRS is scheduled for transmission in the time slot, an uplink grant is transmitted.

28. The method of claim 25, wherein receiving the DMRS from the first UE across the plurality of time slots comprises: Receiving a scheduled DMRS in the time slot is refrained in response to transmitting a downlink grant for the first UE with respect to the time slot.

29. The method of claim 25, further comprising: A configuration indicating whether the DMRS is to be transmitted in a downlink timeslot is transmitted to the first UE.

30. The method of claim 25, wherein receiving the DMRS from the first UE across the plurality of time slots is based on a priority indication of a corresponding transport block.

31. The method of claim 30, wherein the priority indication is one of a downlink control information (DCI) format, a DCI bit field, a radio network temporary identifier (RNTI), a control resource set (CORESET) or search space set index, or a logical channel.

32. An apparatus for wireless communication at an access point, comprising: Memory; as well as at least one processor coupled to the memory and configured to: configuring a first user equipment (UE) to have a first half-duplex configuration, each time slot of the first half-duplex configuration comprising a first physical downlink control channel (PDCCH) on a downlink frequency of a frequency division duplex (FDD) frame structure, a first uplink short burst on an uplink frequency of the FDD frame structure, and a first hybrid automatic repeat request (HARQ) timeline, the downlink frequency being associated with a first subframe of a set of subcarriers and dedicated for downlink traffic, the uplink frequency being associated with a second subframe of the set of subcarriers and dedicated for uplink traffic, the second subframe being different from the first subframe; configuring a second UE to have a second half-duplex configuration different from the first half-duplex configuration, each time slot of the second half-duplex configuration including a second PDCCH on the downlink frequency of the FDD frame structure, a second uplink short burst on the uplink frequency of the FDD frame structure, and a second HARQ timeline; indicating a first direction to the first UE and a second direction to the second UE for a time slot, the first direction being different from the second direction for the time slot; transmitting a first grant for a first transport block on the first PDCCH of the first UE and transmitting a second grant for a second transport block on the second PDCCH of the second UE within the time slot; transmitting or receiving the first transport block and the second transport block according to the first grant and the second grant in the time slot or a subsequent time slot; as well as A retransmission request is transmitted on the first PDCCH or the second PDCCH or an acknowledgement or a negative acknowledgement is received on the first uplink short burst or the second uplink short burst for the first transport block and the second transport block according to the first HARQ timeline or the second HARQ timeline, respectively.

33. The apparatus of claim 32, wherein the at least one processor is further configured to perform any of claims 19-31.

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