Sidelink robustness enhancements for multi-trp ues

Abstract

Certain aspects of the present disclosure provide techniques for enhancing sidelink communications between devices. As described herein, a single sidelink control information (SCI) can schedule a sidelink data transmission with repetition in time and / or frequency.

Description

[0001] TECHNICAL FIELD

[0002] Aspects of the present disclosure relate to wireless communications, and more particularly, to enhancing device-to-device sidelink communications by user equipments (UEs) with multiple transmission reception points (mTRPs).

[0003] BACKGROUND

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, etc. These wireless communication systems can employ multiple-access technologies capable of supporting communication with multiple users by sharing the available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3 GPP).

[0005] In some examples, a wireless multiple-access communication system can include a number of base stations (BSs), which are each capable of simultaneously supporting communication for multiple communication devices, otherwise known as user equipments (UEs). In an LTE or LTE-A network, a set of one or more base stations can define an eNodeB (eNB). In other examples (e.g., in a next generation, new radio (NR), or 5G network), a wireless multiple access communication system can include a number of distributed units (DUs) (e.g., edge units (EUs), edge nodes (ENs), radio heads (RHs), smart radio heads (SRHs), transmission reception points (TRPs), etc.) in communication with a number of central units (CUs) (e.g., central nodes (CNs), access node controllers (ANC), etc.), where a set of one or more DUs, in communication with a CU, can define an access node (e.g., which can be referred to as a BS, 5G NB, next generation NodeB (gNB or gNodeB), transmission reception point (TRP), etc.). A BS or DU can communicate with a set of UEs on downlink channels (e.g., for transmissions from a BS or DU to a UE) and uplink channels (e.g., for transmissions from a UE to a BS or DU).

[0006] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on the same network. NR (e.g., New Radio or 5G) is an example of an emerging telecommunication standard. NR is a set of enhancements to the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using OFDMA with a cyclic prefix (CP) on the downlink (DL) and on the uplink (UL). To these ends, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0007] Sidelink communication is communication from one UE to another UE. As the demand for mobile broadband access continues to increase, there exists a need for further improvements in NR and LTE technology, including improvements in sidelink communication. Preferably, these improvements should be applicable to other multi-access technologies and the telecommunication standards that employ these technologies.

[0008] SUMMARY

[0009] The systems, methods, and devices of the disclosure each have several aspects, no single one of which is solely responsible for its desirable attributes. Without limiting the scope of this disclosure as expressed by the claims that follow, some features will now be discussed briefly. The instant disclosure will be described with reference to illustrative examples. In such description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. However, various examples can be practiced without reference to the specific details of the description. In other instances, well-known methods, procedures, components, and networks have not been described in detail so as not to obscure the present disclosure. The features described herein are meant to be illustrative only and are not intended to be limiting.

[0010] Certain aspects provide a method for wireless communications by a transmitting UE. The method generally includes transmitting sidelink control information (SCI) reserving resources for a data transmission to at least one receiving UE by using repetitions over at least one of time or frequency, and transmitting data to the at least one receiving UE by using repetitions according to the SCI via at least first and second transmission reception points (TRPs) of the transmitting UE.

[0011] Certain aspects provide a method for wireless communications by a receiving UE. The method generally includes receiving, from a transmitting UE, sidelink control information (SCI) reserving resources for a data transmission to at least a second UE by using repetitions over at least one of time or frequency, and monitoring for data transmitted from at least first and second transmission reception points (TRPs) of the transmitting UE by using repetitions according to the SCI.

[0012] Certain aspects provide a transmitting UE. The transmitting UE generally includes means for transmitting sidelink control information (SCI) reserving resources for data transmissions to at least one receiving UE by using repetition over at least one of time or frequency and means for transmitting data to the at least one receiving UE by using the repetition according to the SCI via at least first and second transmission reception points (TRPs) of the transmitting UE.

[0013] Certain aspects provide a receiving UE. The receiving UE generally includes means for receiving, from a transmitting UE, sidelink control information (SCI) reserving resources for data transmissions to at least a second UE by using repetition over at least one of time or frequency and means for monitoring data transmitted from at least first and second transmission reception points (TRPs) of the transmitting UE by using the repetition according to the SCI.

[0014] Certain aspects provide a transmitting UE. The transmitting UE generally includes a transmitter configured to transmit sidelink control information (SCI) reserving resources for data transmissions to at least one receiving UE by using repetition over at least one of time or frequency and to transmit data to the at least one receiving UE by using the repetition according to the SCI via at least first and second transmission reception points (TRPs) of the transmitting UE.

[0015] Certain aspects provide a receiving UE. The receiving UE generally includes a receiver configured to receive, from a transmitting UE, sidelink control information (SCI) reserving resources for data transmissions to at least a second UE by using repetition over at least one of time or frequency and a processing system configured to monitor data transmitted from at least first and second transmission reception points (TRPs) of the transmitting UE by using the repetition according to the SCI.

[0016] Certain aspects provide an apparatus for wireless communication by a transmitting UE. The apparatus generally includes a processing system configured to generate sidelink control information (SCI) reserving resources for data transmissions to at least one receiving UE and data and an interface configured to output the sidelink control information (SCI) for transmissions by using repetition over at least one of time or frequency and the data for transmission to the at least one receiving UE by using the repetition according to the SCI via at least first and second transmission reception points (TRPs) of the transmitting UE.

[0017] Certain aspects provide an apparatus for wireless communication by a receiving UE. The apparatus generally includes an interface configured to receive, from a transmitting UE, sidelink control information (SCI) reserving resources for a data transmission to at least a second UE by using repetition over at least one of time or frequency, and a processing system configured to monitor for data transmitted from at least first and second transmission reception points (TRPs) of the transmitting UE by using the repetition according to the SCI.

[0018] Certain aspects provide a computer-readable medium for wireless communication by a transmitting UE. The computer-readable medium generally includes code executable to transmit sidelink control information (SCI) reserving resources for a data transmission to at least one receiving UE by using repetition over at least one of time or frequency, and transmit data to the at least one receiving UE via at least first and second transmission reception points (TRPs) of the transmitting UE by using the repetition according to the SCI.

[0019] Certain aspects provide a computer-readable medium for wireless communication by a receiving UE. The computer-readable medium generally includes code executable to receive, from a transmitting UE, sidelink control information (SCI) reserving resources for a data transmission to at least a second UE by using repetition over at least one of time or frequency, and monitor for data transmitted from at least first and second transmission reception points (TRPs) of the transmitting UE by using the repetition according to the SCI.

[0020] To the accomplishment of the foregoing and related aspects, this one or more aspects comprise the features as fully described hereinbelow and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects can be employed. BRIEF DESCRIPTION OF DRAWINGS

[0022] So that the above-recited features of the present disclosure can be understood in detail, a more particular description, briefly summarized above, can be had by reference to various aspects, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only certain typical aspects of this disclosure and are therefore not to be considered limiting of its scope, for the description can admit to other equally effective aspects.

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

[0024] FIG. 2 is a block diagram illustrating an example logical architecture of a distributed radio access network (RAN), in accordance with certain aspects of the present disclosure.

[0025] FIG. 3 is a diagram illustrating an example physical architecture of a distributed RAN that can be used in implementations in which the functions of a base station, such as a gNB, are split between a central entity (or “access node controller (ANC)”) and individual edge entities (or “edge node controllers (ENCs)”) that implement a gNB.

[0026] FIG. 4 is a block diagram conceptually illustrating a design of an example base station (BS) and user equipment (UE) in accordance with certain aspects of the present disclosure.

[0027] FIG. 5A and 5B shows a pictorial representation of an example vehicle-to-anything (V2X) system in accordance with certain aspects of the present disclosure.

[0028] FIG. 6 illustrates example resources for sidelink communications in accordance with certain aspects of the present disclosure.

[0029] FIG. 7A and 7B illustrates example resources for sidelink communications in accordance with certain aspects of the present disclosure.

[0030] FIG. 8 illustrates example operations for wireless communications by a transmitting UE in accordance with certain aspects of the present disclosure.

[0031] FIG. 9 illustrates example operations for wireless communications by a receiving UE in accordance with certain aspects of the present disclosure.

[0032] FIG. 10 illustrates an example of sidelink communications with repetition in accordance with certain aspects of the present disclosure.

[0033] FIG. 11 illustrates an example of sidelink communications with repetition in accordance with certain aspects of the present disclosure.

[0034] FIG. 12A and 12B illustrates an example of sidelink communications with repetition in accordance with certain aspects of the present disclosure.

[0035] FIG. 13 illustrates an example of sidelink communications with repetition in accordance with certain aspects of the present disclosure.

[0036] FIG. 14A and 14B illustrates an example of sidelink communications with repetition in accordance with certain aspects of the present disclosure.

[0037] FIG. 15 illustrates a communications device that can include various components configured to perform the operations illustrated in FIG. 8 illustrated in FIG. 13B, in accordance with certain aspects of the present disclosure.

[0038] FIG. 16 communication devices that can include various components configured to perform the operations as FIG. 9 illustrated in the operations of the communication devices.

[0039] To facilitate understanding, like reference numbers are used in all the figures to designate like elements. It is contemplated that elements disclosed in one aspect can be beneficially utilized on other aspects without specific recitation.

[0040] DETAILED DESCRIPTION

[0041] Aspects of the disclosure provide apparatus, methods, processing systems, and computer readable media for enhancing device-to-device sidelink communications by user equipments (UEs) with multiple transmission reception points (mTRPs). As will be described in greater detail below, a single sidelink control information (SCI) can schedule sidelink data communications that are enhanced through the use of repetition in time and / or frequency.

[0042] The following description provides examples, and is not limiting of the scope, applicability, or examples set forth in the claims. Changes can be made in the function and arrangement of elements discussed without departing from the scope of the disclosure. Various examples can omit, substitute, or add various procedures or components as appropriate. For instance, the methods described can be performed in an order different than described, and other steps can be added, omitted, or combined. Also, features described with respect to some examples can be combined in some other examples. For example, a device or method can be implemented using any number of the aspects described herein. Additionally, the scope of the disclosure is intended to cover such devices or methods which can be practiced using other structure, functionality, or structure and functionality in addition to, or other than, the various aspects described herein. It should be understood that any aspect of the disclosure disclosed herein can be embodied by one or more elements of a claim. The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects.

[0043] The techniques described herein can be used for various wireless communication technologies, such as LTE, CDMA, TDMA, FDMA, OFDMA, SC-FDMA and other networks. The terms“network” and“system” are often used interchangeably. A CDMA network can implement a radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes Wideband-CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95 and IS-856 standards. A TDMA network can implement a radio technology such as Global System for Mobile Communications (GSM). An OFDMA network can implement a radio technology such as NR (e.g. 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash- OFDMA, etc. UTRA and E-UTRA are part of Universal Mobile Telecommunication System (UMTS). 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are releases of UMTS that use E-UTRA.

[0044] New Radio (NR) is an emerging wireless communications technology under development in conjunction with the 5G Technology Forum (5GTF). 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named“3rd Generation Partnership Project” (3GPP). cdma2000 and UMB are described in documents from an organization named“3rd Generation Partnership Project 2” (3GPP2). The techniques described herein can be used for the wireless

[0045] New radio (NR) access (e.g., 5G technology) can support various wireless communication services such as enhanced mobile broadband (eMBB) targeting wide bandwidth (e.g., 80 MHz or beyond), millimeter wave (mmW) targeting high carrier frequency (e.g., 25 GHz or beyond), massive machine type communications MTC (mMTC) targeting non-backward compatible MTC techniques, and / or mission critical targeting ultra-reliable low-latency communications (URLLC). These services can include latency and reliability requirements. These services can also have different transmission time intervals (TTI) to meet respective quality of service (QoS) requirements. In addition, these services can co-exist in the same subframe.

[0046] FIG. 1 An example wireless communication network 100 in which various aspects of this disclosure can be implemented is described. For example, FIG. 1 UE120a may include the following references: configured to perform (or used by UE 120a to perform). FIG. 8 or FIG. 9 The sidelink manager 122 described is used for operations that utilize repeated sidelink data transmission in time and / or frequency.

[0047] like FIG. 1 As explained herein, the wireless communication network 100 may include several base stations (BSs) 110a-z (each individually referred to herein as BS 110 or collectively as BS 110) and other network entities. In various aspects of this disclosure, a roadside service unit (RSU) may be considered a type of BS, and BS 110 may be referred to as an RSU. BS 110 may provide communication coverage for a specific geographic area (sometimes referred to as a “cell”), which may be stationary or mobile depending on the location of the mobile BS 110. In some examples, BS 110 may interconnect with each other and / or interconnect to one or more other BSs or network nodes (not shown) in the wireless communication network 100 using any suitable transport network via various types of backhaul interfaces (e.g., direct physical connection, wireless connection, virtual network, etc.). FIG. 1 In the example shown, BS 110a, 110b, and 110c can be macro BSs for macro cells 102a, 102b, and 102c, respectively. BS 110x can be a pico BS for pico cell 102x. BS 110y and 110z can be femto BSs for femto cells 102y and 102z, respectively. A BS can support one or more cells. BS 110 communicates with user equipment (UE) 120a-y (each individually referred to herein as UE 120 or collectively as UE 120) in the wireless communication network 100. UE 120 (e.g., 120x, 120y, etc.) can be distributed throughout the wireless communication network 100, and each UE 120 can be stationary or mobile.

[0048] The wireless communication network 100 may also include a relay station (e.g., relay station 110r) (also referred to as a relay, etc.) that receives data and / or other information transmissions from an upstream station (e.g., BS 110a or UE 120r) and transmits such data and / or other information transmissions to a downstream station (e.g., UE 120 or BS 110), or the relay station relays transmissions between the UEs 120 to facilitate communication between the devices.

[0049] A network controller 130 can couple to a set of BSs 110 and provide coordination and control for these BSs 110. The network controller 130 can communicate with the BSs 110 via a backhaul. The BSs 110 can also communicate with one another (e.g., directly or indirectly) via wireless or wireline backhaul.

[0050] The UEs 120 (e.g., 120x, 120y, etc.) can be dispersed throughout the wireless communication network 100, and each UE can be stationary or mobile. A UE can also be referred to as a mobile station, a terminal, an access terminal, a subscriber unit, a station, a Customer Premises Equipment (CPE), a cellular phone, a smartphone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, an electric

[0051] Certain wireless networks (e.g., LTE) utilize orthogonal frequency division multiplexing (OFDM) on the downlink and single-carrier frequency division multiplexing (SC-FDM) on the uplink. OFDM and SC-FDM partition the system bandwidth into multiple (K) orthogonal subcarriers, which are also commonly referred to as tones, bins, etc. Each subcarrier can be modulated with data. In general, modulation symbols are sent in the frequency domain with OFDM and in the time domain with SC-FDM. The spacing of adjacent subcarriers can be fixed, and the total number of subcarriers (K) can be dependent on the system bandwidth. For example, the spacing of the subcarriers can be 15 kHz and the minimum resource allocation (called a “resource block” (RB)) can be 12 subcarriers (or 180 kHz). Consequently, the nominal fast fourier transfer (FFT) size can be equal to 128, 256, 512, 1024 or 2048 for system bandwidth of 1.25, 2.5, 5, 10, or 20 megahertz (MHz), respectively. The system bandwidth can also be partitioned into subbands. For example, a subband can cover 1.08 MHz (i.e., 6 resource blocks), and there can be 1, 2, 4, 8, or 16 subbands for system bandwidth of 1.25, 2.5, 5, 10, or 20 MHz, respectively.

[0052] While aspects of the examples described herein can be associated with LTE technologies, aspects of the present disclosure can be applicable with other wireless communications systems, such as NR. NR can utilize OFDM with a CP on the uplink and downlink and include support for half-duplex operation using TDD. Beamforming can be supported and beam direction can be dynamically configured. MIMO transmissions with precoding can also be supported. A MIMO configuration in the DL can support up to 8 transmit antennas (multi-layer downlink transmission with up to 8 streams) and up to 2 streams per UE. Multi-layer transmissions with up to 2 streams per UE can be supported. Aggregation of multiple cells can be supported with up to 8 serving cells.

[0053] In some examples, access to an air interface can be scheduled. A scheduling entity (e.g., a BS) allocates resources for communication among some or all devices and equipment within its service area or cell. The scheduling entity can be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities to use. That is, for scheduled communication, subordinate entities utilize resources allocated by the scheduling entity. Base stations are not the only entities that can function as a scheduling entity. In some examples, a UE can function as a scheduling entity and can schedule resources for one or more subordinate entities, such as one or more other UEs, and the other UEs can utilize the resources scheduled by the UE. In some examples, a UE can act as a scheduling entity in a peer-to-peer (P2P) network and / or in a mesh network. In a mesh networking example, UEs can communicate directly with one another in addition to communicating with a scheduling entity.

[0054] In FIG. 1 , solid lines with double arrows indicate desired transmissions between a UE and a serving BS, which is a BS selected by the UE to serve the UE on the downlink and / or uplink. A fine dashed line with double arrows indicates transmissions between a UE and a BS, which can cause interference to the desired transmission between the UE and the serving BS.

[0055] FIG. 2 An example logical architecture of a distributed radio access network (RAN) 200 is illustrated, which can be implemented in the wireless communication network 100 illustrated in FIG. 1 . The 5G access node 206 can include an access node controller (ANC) 202. The ANC 202 can be a central unit (CU) for the distributed RAN 200. The backhaul interface to the next generation core network (NG-CN) 204 can terminate at the ANC 202. The backhaul interface to neighboring next generation access nodes (NG-ANs) 210 can terminate at the ANC 202. The ANC 202 can include one or more TRPs 208 (e.g., cells, BSs, gNBs, etc.).

[0056] The TRPs 208 can be a distributed unit (DU). The TRPs 208 can be connected to a single ANC (e.g., the ANC 202) or more than one ANC (not illustrated). For example, for RAN sharing, radio as a service (RaaS), and service specific AND deployments, the TRP 208 can be connected to more than one ANC. The TRPs 208 can each include one or more antenna ports. The TRPs 208 can be configured to individually (e.g., dynamic selection) or jointly (e.g., joint transmission) serve traffic to a UE.

[0057] The logical architecture of the distributed RAN 200 can support fronthaul schemes across different deployment

[0058] The logical architecture of the distributed RAN 200 can share features and / or components with LTE. For example, the next generation access node (NG-AN) 210 can support dual connectivity with NR and can share a common fronthaul for LTE and NR.

[0059] The logical architecture of the distributed RAN 200 can enable cooperation between and among TRPs 208, for example, within a TRP and / or across TRPs via the ANC 202. An inter-TRP interface can not be used.

[0060] Logical functions can be dynamically distributed within the logical architecture of the distributed RAN 200. The Radio Resource Control (RRC) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, Media Access Control (MAC) layer, and Physical (PHY) layer can be adaptively placed at the DU (e.g., TRP 208) or CU (e.g., ANC 202).

[0061] FIG. 3 An example physical architecture of the distributed RAN 300 according to various aspects of this disclosure is described. A centralized core network unit (C-CU) 302 can host core network functions. The C-CU 302 can be deployed centrally. C-CU 302 functionality can be offloaded (e.g., to Advanced Radio Services (AWS)) in an attempt to handle peak capacity.

[0062] The Centralized RAN Unit (C-RU) 304 can store one or more ANC functions. Optionally, the C-RU 304 can store core network functions locally. The C-RU 304 can be deployed in a distributed manner. The C-RU 304 can be located close to the network edge.

[0063] The DU 306 can store one or more TRPs (Edge Node (EN), Edge Unit (EU), Radio Header Terminal (RH), Smart Radio Header Terminal (SRH), etc.). The DU can be located at the edge of a network with radio frequency (RF) functionality.

[0064] FIG. 4 The explanation (e.g.) FIG. 1 The example components of BS 110a and UE 120a described herein can be used to implement various aspects of this disclosure. For example, antenna 452, processors 466, 458, 464, and / or controller / processor 480 of UE 120a can be used to perform the functions described herein. FIG. 8 and / or FIG. 9 The various techniques and methods described.

[0065] At the BS 110a, a transmit processor 420 can receive data from a data source 412 and control information from a controller / processor 440. The control information can be for the physical broadcast channel (PBCH), physical control format indicator channel (PCFICH), physical hybrid ARQ indicator channel (PHICH), physical downlink control channel (PDCCH), group common PDCCH (GC PDCCH), etc. The data can be for the physical downlink shared channel (PDSCH), etc. The processor 420 can process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively. The processor 420 can also generate reference symbols, e.g., for the primary synchronization signal (PSS), secondary synchronization signal (SSS), and cell-specific reference signal (CRS). A transmit (TX) multiple-input multiple-output (MIMO) processor 430 can perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and / or the reference symbols, if applicable, and can provide output symbol streams to the modulators (MODs) 432a through 432t. Each modulator 432 can process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator can further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. Downlink signals from modulators 432a through 432t can be transmitted via the antennas 434a through 434t, respectively.

[0066] At the UE 120a, the antennas 452a through 452r can receive the downlink signals from the base station 110a and can provide received signals to the demodulators (DEMODs) 454a through 454r, respectively, in the transceivers. Each demodulator 454 can condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples. Each demodulator can further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 456 can obtain received symbols from all the demodulators 454a through 454r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor 458 can process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 120a to a data sink 460, and provide decoded control information to the controller / processor 480.

[0067] On the uplink, at UE 120a, a transmit processor 464 can receive and process data (e.g., for the physical uplink shared channel (PUSCH)) from a data source 462 and control information (e.g., for the physical uplink control channel (PUCCH)) from the controller / processor 480. The transmit processor 464 can also generate reference symbols for a reference signal (e.g., for the sounding reference signal (SRS)). The symbols from the transmit processor 464 can be precoded by a TX MIMO processor 466 if applicable, further processed by the demodulators 454a through 454r in the transceivers, and transmitted to the base station 110a. At the BS 110a, the uplink signals from the UE 120a can be received by the antennas 434, processed by the modulators 432, detected by a MIMO detector 436 if applicable, and further processed by a receive processor 438 to obtain decoded data and control information sent by the UE 120a. The receive processor 438 can provide the decoded data to a data sink 439 and to the controller / processor 440.

[0068] The controller / processors 440 and 480 can direct the operation at the BS 110a and the UE 120a, respectively. The processor 440 and / or other processors and modules at the BS 110a can perform or direct the execution of processes for the techniques described herein. The memories 442 and 482 can store data and program codes for BS 110a and UE 120a, respectively. The scheduler 444 can schedule UEs for data transmission on the downlink, sidelink, and / or uplink. FIG. 2 As shown in FIG. 5, the controller / processor 480 of the UE 120a has a sidelink manager 481 that can be configured for transmitting sidelink communications to another UE. Although shown at the controller / processor 480 and the controller / processor 440, other components of the UE 120a and the BS 110a can also be used to perform the operations described herein. The memories 442 and 482 can store data and program codes for BS 110a and UE 120a, respectively. The scheduler 444 can schedule UEs for data transmission on the downlink, sidelink, and / or uplink.

[0069] In some cases, two or more subordinate entities (e.g., UEs) can communicate with each other using sidelink signals. Real-world applications of such sidelink communications can include public safety, proximity services, UE-to-network relaying, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, mission-critical mesh, and / or various other suitable applications. Generally, a sidelink signal can refer to a signal communicated from one subordinate entity (e.g., UE1) to another subordinate entity (e.g., UE2) without relaying that communication through the scheduling entity (e.g., UE or BS), even though the scheduling entity can be utilized for scheduling and / or control purposes. In some examples, the sidelink signals can be communicated using a licensed spectrum (unlike wireless local area networks (WLANs), which typically use an unlicensed spectrum).

[0070] FIG. 5A and 5B A diagrammatic representation of an example vehicle-to-anything (V2X) system is shown in accordance with some aspects of the present disclosure. For example, FIG. 5A and 5B The vehicles shown in

[0071] The V2X system provided in FIG. 5A and 5B provides two complementary transmission modes. The first transmission mode, shown by way of example in FIG. 5A involves direct communication (e.g., also referred to as sidelink communication) between participants that are proximate to each other in a local area. The second transmission mode, shown by way of example in FIG. 5B involves network communication through a network, which can be implemented through a Uu interface (e.g., a wireless communication interface between a radio access network (RAN) and a UE).

[0072] Referring to FIG. 5A , a V2X system 500 (e.g., including vehicle-to-vehicle (V2V) communications) is illustrated with two vehicles 502, 504. The first transmission mode allows for direct communication between different participants in a given geographic location. As illustrated, a vehicle can have an individual wireless communication link 506 with a pedestrian (i.e., vehicle-to-pedestrian (V2P), e.g., via a UE) through a PC5 interface. Communication between vehicles 502 and 504 can also occur through a PC5 interface 508. In a similar manner, communication from vehicle 502 to other highway components (e.g., a roadside service unit 510, such as a traffic signal or sign) (i.e., vehicle-to-infrastructure (V2I)) can occur through a PC5 interface 512. For FIG. 5AWith each communication illustrated, elements can communicate bi-directionally, so each element can be a transmitter and a receiver of information. The V2X system 500 can be a self-managed system implemented without network entity assistance. Self-managed systems can enable improved spectral efficiency, reduced cost, and increased reliability because network service interruptions do not occur during handover operations for mobile vehicles. The V2X system can be configured to operate in a licensed or unlicensed spectrum, whereby any vehicle with an equipped system can access a common frequency and share information. Such coordinated / common spectrum operation allows for safe and reliable operation.

[0073] FIG. 5B A V2X system 550 is shown for communication between vehicles 552 and 554 through a network entity 556. These network communications can occur through a discrete node, such as a base station, e.g., eNB or gNB, that sends and receives information to and from the vehicles 552, 554 (e.g., relays information between the vehicles 552, 554). Network communications over vehicle-to-network (V2N) links 558 and 510 can be used, for example, for long-range communications between vehicles, such as for conveying that there is a traffic accident a certain distance ahead along a road or highway. Other types of communications can be sent by the node to the vehicles, such as traffic flow conditions, road hazard warnings, environmental / weather reports, service station availability, and other similar examples. Such data can be obtained from a cloud-based sharing service.

[0074] In some cases, two or more subordinate entities (e.g., UEs) can communicate with each other using sidelink signals. As described above, V2V and V2X communications are examples of communications that can be transmitted via sidelink. When a UE is transmitting a sidelink communication on a subchannel of a frequency band, the UE typically cannot receive another communication in that frequency band (e.g., another sidelink communication from another UE). Other applications of sidelink communications can include public safety or service announcement communications, proximity service communications, UE-to-network relay communications, device-to-device (D2D) communications, Internet of Everything (IoE) communications, Internet of Things (IoT) communications, mission-critical mesh communications, among other suitable applications. Generally speaking, a sidelink can refer to a direct link between one subordinate entity (e.g., UE1) and another subordinate entity (e.g., UE2). As such, a sidelink can be used to transmit and receive communications (also referred to herein as “sidelink signals”) without needing to relay the communications through a scheduling entity (e.g., a BS), even though the scheduling entity can be used for scheduling or control purposes. In some examples, the sidelink signals can be communicated using a licensed spectrum (unlike wireless local area networks, which typically use an unlicensed spectrum).

[0075] Various sidelink channels can be used for sidelink communication, including the Physical Sidelink Discovery Channel (PSDCH), Physical Sidelink Control Channel (PSCCH), Physical Sidelink Shared Channel (PSSCH), and Physical Sidelink Feedback Channel (PSFCH). The PSDCH carries discovery expressions that enable neighboring devices to discover each other. The PSCCH carries control signaling (such as sidelink resource configurations and other parameters for data transmission), while the PSSCH carries data transmission.

[0076] Regarding PSSCH operations, the UE can perform transmission or reception on a carrier within a time slot. Typically, within the time slot period, transmission resources for sidelink transmission are reserved or allocated on sub-channels of the frequency band. NR sidelink can provide support for the UE in cases where all symbols in a time slot are available for sidelink, and in another case where only a coherent subset of symbols in a time slot is available for sidelink.

[0077] The PSFCH can carry feedback, such as channel state information (CSI) related to sidelink channel quality. Sequence-based PSFCH formats with one symbol (excluding the AGC training period) are supported. The following formats are possible: PSFCH formats based on PUCCH format 2, and PSFCH formats that span all symbols available for the sidelink across time slots.

[0078] FIG. 6 It is used for UE (e.g., FIG. 1 The example shown is of time-frequency resource 600 for sidelink communication (broadcast and multicast device-to-device or D2D) between UEs 110. As mentioned above, refer to... FIG. 5A and 5B A sidelink generally refers to a link between two users, or a user relay can be used for different scenarios and applications. As previously described, when a UE transmits sidelink communication on a sub-channel of a frequency band, the UE typically cannot receive other communication in that band (e.g., another sidelink communication from another UE). Therefore, sidelink communication can be referred to as half-duplex. Consequently, UE 0, UE 1, and UE 5, which transmit sidelink communications 612, 614, and 616 respectively, cannot receive sidelink communication from each other. That is, UE 0 cannot receive sidelink transmissions 614 and 616. Similarly, UE 2 cannot receive sidelink transmissions 624 and 632 from UE 3 and UE 4 respectively. Moreover, UE 3 cannot receive sidelink transmission 622 from UE 2, and UE 4 cannot receive sidelink transmission 634 from UE 2.

[0079] Example sidelink robustness enhancement for mTRP UE

[0080] Aspects of the disclosure relate to wireless communications, and more particularly, to enhancing device-to-device sidelink communications by user equipments (UEs) with multiple transmission reception points (mTRP UEs) (mTRP UEs).

[0081] mTRPs can be used in current and advanced systems, such as 5G / NR, to improve reliability, coverage, and capacity performance through flexible deployment scenarios. One example mTRP scenario is to equip a vehicle with TRPs located in different parts of the vehicle. This type of deployment can help improve reliability in applications where safety and other high robustness are desired.

[0082] In some cases, mTRPs at a vehicle can be used in an effort to achieve 360-degree coverage around the vehicle. This type of coverage (e.g., at 90+ degrees of elevation) can be particularly desirable for large vehicles like trucks with a trailer. In such cases, different TRPs can be located on the roof, rear bumper, and front bumper of the truck rather than just the roof rear bumper.

[0083] Such mTRP applications can involve V2X sidelink communications. As FIG. 7A and 7B both periodic and aperiodic transmissions can be supported in NR V2X design.

[0084] As explained in FIG. 7A transmissions in a current slot can reserve resources in the current slot and up to two future slots. The reservation information can be carried in sidelink control information (SCI). As mentioned above, resource allocation can be in units of sub-channels in the frequency domain, and can be limited to one slot in the time domain.

[0085] As explained in FIG. 7B a periodicity (e.g., with a configurable value between 0 ms and 1000 ms) can also be signaled in SCI. Periodic resource reservation and signaling can be enabled and / or disabled by (pre-)configuration.

[0086] Aspects of the disclosure present various options for coverage / robustness enhancements for mTRP UEs. In some cases, time division multiplexing (TDM) and / or frequency division multiplexing (FDM) schemes based on a single SCI structure can be used to schedule sidelink data transmissions with repetition over time and / or frequency domains.

[0087] FIG. 8 Example operations 800 performed by a transmitting UE, in accordance with certain aspects of the present disclosure, are illustrated. The operations 800 can be performed, for example, by a UE (e.g., a UE 115 as described above with respect to FIG. 1). FIG. 1 or FIG. 4to schedule sidelink data transmissions (for which resources are reserved) with repetition in time and / or frequency.

[0088] The operations 800 begin, at 802, by transmitting, by a transmitting UE, sidelink control information (SCI) reserving resources for a data transmission to at least one receiving UE with repetition in at least one of time or frequency.

[0089] At 804, the transmitting UE transmits data to the at least one receiving UE via at least first and second transmission reception points (TRPs) of the transmitting UE with repetition according to the SCI.

[0090] FIG. 9 Example operations 900 are illustrated that can be considered complementary to the operations 800 of FIG. 8 For example, 900 can be performed by a receiving UE to process a data transmission with repetition sent by a transmitting UE (performing the operations 800). FIG. 8

[0091] The operations 900 begin, at 902, by receiving, by a receiving UE, sidelink control information (SCI) reserving resources for a data transmission to at least a second UE with repetition in at least one of time or frequency from a transmitting UE.

[0092] At 904, the receiving UE monitors for data transmitted from at least first and second transmission reception points (TRPs) of the transmitting UE with repetition according to the SCI.

[0093] In a TDM scheme, the mTRP UE can switch the TRPs to transmit in a round robin between multiple TRPs. FIG. 10 An example of such a scheme involving an mTRP UE with 2 TRPs (TRP-1 and TRP-2) is illustrated.

[0094] In some cases, the transmitting UE can randomize how it selects a TRP for any particular repetition or it can cycle through TRPs or precoders (e.g., split power allocation across TRPs) over multiple (re)transmissions of a packet to achieve 360 degree coverage (e.g., as shown where each of the front and back TRPs cover approximately 180 degrees).

[0095] The mTRP deployment shown can be useful, for example, to enhance robustness of sensor sharing message transmissions from vehicles equipped with mTRPs. Listening to packet transmissions sent with repetition by switching between TRP-1 and / or TRP-2 in time can result in better coverage.

[0096] ​As illustrated, at time tl, a PSSCH can be transmitted from TRP-1 with a first TCI state / QCL assumption. At time t2, the PSSCH (same transport block / TB) can be retransmitted from TRP-2 with a second TCI state / QCL assumption.

[0097] In some cases, various TDM schemes can be enabled by higher layer configuration from the transmitting UE and signaled to the receiving UE, e.g., via SCI-2 or MAC-CE.

[0098] As FIG. 11 As illustrated in FIG. 6, in some cases, TB repetition can enhance coverage based on slot aggregation. In such cases, repetitions of the same TB can be transmitted from different TCI states / TRPs within one resource reservation window.

[0099] In some cases, the first stage SCI can indicate the frequency and time resource assignment in a similar manner as the single TRP case, while the TCI state indication can be signaled via the second stage SCI or MAC CE.

[0100] With the illustrated repetition based on slot aggregation, the transmitting UE can decide the transmitted redundancy version (RV) for each hybrid automatic repeat request (HARQ) process and TCI state. In such cases, the receiving UE can then perform HARQ combining based on the HARQ process ID and RV indication.

[0101] As mentioned above, in some cases, the TCI state indication can be via the second stage SCI, which can indicate other information such as HARQ process ID and redundancy version. In other cases, the TCI state can be indicated via MAC CE or via MAC CE and SCI-2.

[0102] In some cases, the receiving UE can report channel state information (CSI) based on each TCI state. In some cases, the reported CSI can be based on optimized measurements of two TCI states.

[0103] As FIG. 12A and 12B As illustrated in FIG. 7, in some cases, intra-slot repetition can be used. As illustrated in FIG. 8, in some cases, to improve control coverage, SCI-1 and SCI-2 can be transmitted from two TRPs (labeled as TCI state 3 in FIG. 7) with a certain power split ratio (between TRPs). FIG. 12A FIG. 12A

[0104] ​​As illustrated, the SCI-1 / SCI-2 transmission can be followed by gap symbols, data transmission with TCI state 1 and TCI state 2 respectively, all within one slot. As illustrated, there can be 2 repetitions corresponding to 2 TRPs (TCI states). The gap symbol length and symbol number for each repetition within a slot can be configured via the second stage SCI (e.g., which can also carry HARQ process ID, redundancy version and TCI indication). In some cases, the RV iteration for each repetition can follow a defined pattern (e.g., defined in NR Rel-15).

[0105] As FIG. 12B illustrated in FIG. 12A , in another case, the second stage SCI can be transmitted in each repetition. In this case, the data conveyed by SCI-2 (and the format of SCI-2) can be different from the SCI-2 used in the example shown in .

[0106] As FIG. 13 illustrated in , in some cases, repetitions can be sent according to a single-SCI based FDM scheme using wideband precoding resource block group (PRG). As illustrated, SCI-1 can be transmitted on a first subchannel along with associated data transmission by (e.g., TCI state 1).

[0107] SCI-2 can be repeated in two half-transmissions with two indications / content of repetitions in each frequency resource field. In some cases, the FDM pattern format in SCI-2 can be defined to indicate the resource reservation pattern for multi-TRP (e.g., including TCI state, RV pattern, etc.).

[0108] The receiving UE typically would not expect PSCCH in the latter half of SCI-1 in the case of single-SCI based scheme. With the RV indication in SCI-2, the receiving UE can expect the same or different RVs from the two different half resources.

[0109] In some cases, the resource selection can be based on its own TRP RSRP measurement and the second half transmission can be considered as a backup detection occasion for coverage enhancement. One advantage of this approach is that it can be based on the current SCI design with little or no change to the SCI-1 format.

[0110] FIG. 14A As 14B illustrated in , in some cases, repetitions can be sent according to a single-SCI based FDM scheme using narrowband PRG resource allocation scheme.

[0111] With the PRG narrowband resource allocation scheme, FDM with a single SCI based format can be enabled. As illustrated, to have better (e.g., balanced) coverage for control information, a wideband like TCI state can be indicated as a SCI-1 + SCI-2 transmission.

[0112] FIG. 14A Continuous PRG narrowband allocation for FDM schemes is illustrated, while FIG. 14B Non-continuous PRG narrowband allocation for FDM schemes is illustrated. In some cases, non-continuous PRG narrowband allocation can be used in an effort to achieve additional frequency division gain. As illustrated, in either case, data transmission can be repeated by multiple TCI states (e.g., by TCI states indicated in SCI-2 as described above).

[0113] By scheduling (e.g., via a single SCI) sidelink data transmissions that are repeated in time and / or frequency domain, aspects of the present disclosure can be used to enable more robust sidelink communications.

[0114] FIG. 15 A communications device 1500 including various components (e.g., corresponding to means-plus-function components) configured to perform operations for the techniques disclosed herein, such as the operations illustrated in FIG. 13, is illustrated and described below. FIG. 8 The communications device 1500 includes a processing system 1502 coupled to a transceiver 1508. The transceiver 1508 is configured to transmit and receive signals (such as the various signals described herein) for the communications device 1500 via an antenna 1510. The processing system 1502 can be configured to perform processing functions for the communications device 1500, including processing signals received by and / or to be transmitted by the communications device 1500.

[0115] The processing system 1502 includes a processor 1504 coupled to a computer- readable medium / memory 1512 via a bus 1506. In certain aspects, the computer-readable medium / memory 1512 is configured to store instructions (e.g., computer-executable code) that, when executed by the processor 1504, cause the processor 1504 to perform FIG. 8the operations illustrated in FIG. 16. In certain aspects, computer- readable medium / memory 1512 stores code 1514 for transmitting sidelink control information (SCI) for reserving resources for data transmissions to at least one receiving UE using repetition in at least one of time or frequency, and code 1516 for transmitting data to the at least one receiving UE using repetition in accordance with the SCI via at least first and second transmission-reception points (TRPs) of the transmitting UE. In certain aspects, processor 1504 has circuitry configured to implement code stored in computer-readable medium / memory 1512. Processor 1504 includes circuitry 1520 for transmitting sidelink control information (SCI) for reserving resources for data transmissions to at least one receiving UE using repetition in at least one of time or frequency, and circuitry 1522 for transmitting data to the at least one receiving UE using repetition in accordance with the SCI via at least first and second transmission-reception points (TRPs) of the transmitting UE.

[0116] FIG. 16 communication device 1600 that can include various components (e.g., corresponding to means-plus-function components) configured to perform the operations disclosed herein, such as FIG. 9 communication device 1600 that can include various components (e.g., corresponding to means-plus-function components) configured to perform the operations disclosed herein, such as

[0117] communication device 1600 that can include various components (e.g., corresponding to means-plus-function components) configured to perform the operations disclosed herein, such as FIG. 9The operations illustrated in FIG. 16 can be implemented as code 1614, 1616 stored on a computer-readable medium 1612. In some aspects, the computer-readable medium 1612 stores code 1614 for receiving, from a transmitting UE, sidelink control information (SCI) reserving resources for data transmissions to at least a second UE by using repetition over at least one of time or frequency and code 1616 for monitoring for data transmitted from at least first and second transmission reception points (TRPs) of the transmitting UE by using repetition according to the SCI. In some aspects, the processor 1604 has circuitry configured to implement the code stored in the computer-readable medium / memory 1612. The processor 1604 includes circuitry 1620 for receiving, from a transmitting UE, sidelink control information (SCI) reserving resources for data transmissions to at least a second UE by using repetition over at least one of time or frequency and circuitry 1622 for monitoring for data transmitted from at least first and second transmission reception points (TRPs) of the transmitting UE by using repetition according to the SCI.

[0118] The methods disclosed herein comprise one or more steps or actions for achieving the methods. The method steps and / or actions can be interchanged with one another without departing from the scope of the claims. In other words, unless a specific order is specified, the order and / or use of the

[0119] As used herein, the phrase “at least one of” followed by a listing of two or more items means any combination of those items, including single members. As an example, “at least one of a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination of multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c, or any other ordering of a, b, and c).

[0120] As used herein, the term “determining” encompasses a wide variety of actions. For example, “determining” can include calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, a database or another data structure), ascertaining and the like. Also, “determining” can include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory) and the like. Also, “determining” can include resolving, selecting, choosing, establishing and the like.

[0121] The preceding description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will readily be understood by those skilled in the art, and the universal principles defined herein may be applied to other aspects. Therefore, the claims are not intended to be limited to the aspects shown herein, but are to be granted the full scope consistent with the language of the claims, wherein references to the singular form of an element are not intended to mean “one and only one” (unless specifically stated otherwise) but “one or more.” Unless specifically stated otherwise, the term “some / a” refers to one or more. All structural and functional equivalents of the aspects described throughout this disclosure that are now or hereafter known to a person skilled 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 donated to the public, whether or not such disclosure is expressly stated in the claims. No element of a claim should be interpreted in accordance with the provisions of 35 U.S.SC §112(f) unless the element is expressly stated using the phrase “means for…” or, in the case of a method claim, the element is stated using the phrase “steps for…”.

[0122] The various operations of the methods described above can be performed by any suitable means capable of performing the corresponding functions. These means may include various hardware and / or software components and / or modules, including but not limited to circuits, application-specific integrated circuits (ASICs), or processors. Generally, where the operations illustrated in the figures are present, these operations may have corresponding paired means plus functional components. For example, FIG. 4 The processors 458, 464, and 466 of UE120a and / or controller / processor 480, and / or the processors 420, 430, and 438 of BS 110a and / or controller / processor 440 shown can be configured to perform FIG. 8 Operation 800 and / or FIG. 9 Operation 900.

[0123] The receiving device may include FIG. 4 The transceiver, receiver, or at least one antenna and at least one receiving processor described herein. The means for transmitting, transmitting, or outputting may include... FIG. 4 The transceiver, transmitter, or at least one antenna and at least one transmission processor described herein. The means for selection, the means for monitoring, and the means for execution may include a processing system, which may include one or more processors, such as... FIG. 4 The UE120a shown includes 458, 464 and 466 and / or controller / processor 480 and / or BS 110a includes processors 420, 430, 438 and / or controller / processor 440.

[0124] In some cases, a device can not actually transmit frames, but can have an interface for outputting frames for transmission (a means for outputting). For example, a processor can output frames to a radio frequency (RF) front end via a bus interface for transmission. Similarly, a device can not actually receive frames, but can have an interface for obtaining frames received from another device (a means for obtaining). For example, a processor can obtain (or receive) frames from an RF front end via a bus interface for reception.

[0125] The various illustrative logical blocks, modules, and circuits described in connection with the disclosure can be implemented or performed with a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor can be a microprocessor, but in the alternative, the processor can be any commercially available processor, controller, microcontroller, or state machine. A processor can also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0126] If implemented in hardware, an example hardware configuration can include a processing system in a wireless node. The processing system can be implemented with a bus architecture. The bus can include any number of interconnecting buses and bridges depending on the specific application of the processing system and the overall design constraints. The bus can link together various circuits including processors, machine-readable media, and buses themselves. A bus interface can be used to connect a network adapter to the processing system via the bus. The network adapter can be used to implement signal processing functionality for the PHY layer. In the case of user terminal 120 (see FIG. 1), a user interface (e.g., keypad, display, mouse, joystick, etc.) can also be connected to the bus. The bus can also link various other circuits such as timing sources, peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further. The processor can be implemented with one or more general-purpose and / or special-purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuitry that can execute software. Depending on the specific application of the processing system and the overall design constraints, those of skill in the art will recognize the best way to implement the functions described with respect to the processing system. FIG. 1 ) can also be connected to the bus. The bus can also link various other circuits such as timing sources, peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further. The processor can be implemented with one or more general-purpose and / or special-purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuitry that can execute software. Depending on the specific application of the processing system and the overall design constraints, those of skill in the art will recognize the best way to implement the functions described with respect to the processing system.

[0127] If implemented in software, the functions can be stored or transmitted over as one or more instructions or code on a computer-readable medium. Software shall be construed broadly to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. Computer-readable media include both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. The processor can be responsible for managing the bus and general processing, including the execution of software modules stored on the machine-readable storage media. A computer-readable storage medium can be coupled with the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium can be integral with the processor. By way of example, the machine-readable media can include a transmission line, a carrier wave modulated by data, and / or a computer readable storage medium with instructions stored thereon separate from the wireless node, all of which can be accessed via the bus. Alternatively, or in addition, the machine-readable media, or any portion thereof, can be integrated with the processor, such as the case can be with cache and / or general register files. Examples of machine-readable storage media can include, by way of example, RAM (Random Access Memory), flash memory, ROM (Read Only Memory), PROM (Programmable Read-Only Memory), EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage medium, or any combination thereof. The machine-readable media can be embodied in a computer-program product.

[0128] A software module can comprise a single instruction, or many instructions, and can be distributed over several different code segments, among different programs, and across multiple storage media. The computer-readable media can comprise a number of software modules. The software modules include instructions that, when executed by an apparatus such as a processor, cause the processing system to perform various functions. The software modules can include a transmission module and a receiving module. Each software module can reside in a single storage device or be distributed across multiple storage devices. By way of example, a software module can be loaded into RAM from a hard drive when a triggering event occurs. During execution of the software module, the processor can load some of the instructions into cache to increase access speed. One or more cache lines can then be loaded into a general register file for execution by the processor. When referring to the functionality of a software module below, it will be understood that such functionality is implemented by the processor when executing instructions from that software module.

[0129] Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray® disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Thus, in some aspects computer-readable media can comprise non-transitory computer-readable media (e.g., tangible media). In addition, for other aspects computer-readable media can comprise transitory computer- readable media (e.g., a signal). Combinations of the above should also be included within the scope of computer-readable media.

[0130] Thus, certain aspects can comprise a computer program product for performing the operations presented herein. For example, such a computer program product can comprise a computer-readable medium having instructions stored thereon, the instructions being executable by one or more processors to perform the operations described herein. For example, aspects of a computer program product can include a computer-readable medium having instructions stored FIG. 8 and / or FIG. 9 executed by one or more processors to perform the operations described herein and / or illustrated in FIGs. 1-6.

[0131] For example, a user terminal and / or base station can be coupled to a server to facilitate the transfer of means for performing the methods described herein. Alternatively, various methods described herein can be provided via a storage medium (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or floppy disk, etc.), such that a user terminal and / or base station can obtain the various methods by coupling the storage medium to the device.

[0132] It is understood that the claims are not limited to the precise configuration and components illustrated above. Various modifications, changes, omissions, substitutions, and equivalents can be made in the methods and apparatuses described above without departing from the scope of the claims.​

Claims

1. A method for wireless communications by a transmitting user equipment (UE), comprising: transmitting resource sidelink control information (SCI) for a data transmission to at least one receiving UE using repetitions in time or frequency; and transmitting data to the at least one receiving UE using repetitions according to the SCI via at least first and second transmission reception points (TRPs) of the transmitting UE.

2. The method of claim 1, wherein the repetitions are achieved via time division multiplexing (TDM) in which the first and second TRPs transmit packets containing the data in different slots.

3. The method of claim 2, further comprising selecting a TRP for transmission in a given slot randomly, by cycling through the TRPs, or by cycling through precoders that allocate transmit power across the TRPs.

4. The method of claim 1, wherein the data transmission comprises transmitting repetitions of a same transport block (TB) from different transmission configuration indicator (TCI) states within one resource reservation window.

5. The method of claim 4, wherein the SCI comprises: a first stage SCI indicating time and frequency resources for the data transmission; and the TCI states are indicated via at least one of a second stage SCI or a medium access control (MAC) control element (CE).

6. The method of claim 4, wherein: the data transmission comprises transmitting a redundancy version (RV) for each hybrid automatic repeat request (HARQ) process or TCI state.

7. The method of claim 1 or 2, wherein the repetitions are transmitted within the same slot.

8. The method of claim 7, wherein at least one of: an RV iteration of each repetition follows a particular pattern; or a second stage SCI is transmitted in each repetition.

9. The method of claim 1, wherein the repetitions are achieved via frequency division multiplexing (FDM) in which the first and second TRPs transmit packets containing the data in different slots.

10. The method of claim 1, wherein the SCI is transmitted on a first subchannel with the data transmission.

11. The method of claim 1, wherein: the SCI comprises an SCI that is repeated in both halves of a transmission.

12. The method of claim 1, wherein one or more fields in the SCI indicate a resource reservation pattern for multiple TRPs, including transmission configuration indicator (TCI) states.

13. The method of claim 1, wherein the SCI indicates resources for a precoding resource block group (PRG) narrowband resource allocation scheme.

14. The method of claim 1, wherein the SCI indicates a transmission configuration indicator (TCI) state that is like wideband.

15. The method of claim 1, wherein the data transmission is repeated by multiple transmission configuration indicator (TCI) states.

16. A method for wireless communications by a receiving user equipment (UE), comprising: receiving, from a transmitting UE, sidelink control information (SCI) to reserve resources for a data transmission to at least a second UE by using repetition over at least one of time or frequency; and monitoring for data transmitted from at least first and second transmission reception points (TRPs) of the transmitting UE using the repetition according to the SCI.

17. The method of claim 16, wherein the repetition is achieved via time division multiplexing (TDM) in which the first and second TRPs transmit packets containing the data in different slots.

18. The method of claim 17, wherein the monitoring comprises monitoring for repetitions from a TRP selected by the transmitting UE randomly for a transmission in a given slot, by cycling through TRPs, or by cycling through precoders allocating transmit power across TRPs.

19. The method of claim 16, wherein the monitoring comprises monitoring for repetitions of a same transport block (TB) from different transmission configuration indicator (TCI) states within one resource reservation window.

20. The method of claim 19, wherein the SCI comprises: a first stage SCI indicating time and frequency resources for the data transmission; and the TCI states are indicated via at least one of a second stage SCI or a medium access control (MAC) control element (CE).

21. The method of claim 19, wherein: the monitoring comprises monitoring for a redundancy version (RV) for each hybrid automatic repeat request (HARQ) process or TCI state; and the method further comprises performing combining to process different repetitions based on the redundancy versions.

22. The method of claim 16, wherein the repetitions are received within a same slot.

23. The method of claim 22, wherein at least one of: an RV iteration of each repetition follows a particular pattern; or a second stage SCI is received in each repetition.

24. The method of claim 16, wherein the repetition is achieved via frequency division multiplexing (FDM) in which the first and second TRPs transmit packets containing the data in different slots.

25. The method of claim 16 or 24, wherein the SCI is transmitted on a first subchannel with the data transmission.

26. The method of claim 16, wherein: the SCI comprises an SCI repeated in both halves of a transmission.

27. The method of claim 16, wherein one or more fields in the SCI indicate a resource reservation pattern for multiple TRPs, including transmission configuration indicator (TCI) states.

28. The method of claim 16, wherein the SCI indicates resources for a precoding resource block group (PRG) narrowband resource allocation scheme.

29. The method of claim 16, wherein the SCI indicates a wideband-like transmission configuration indicator (TCI) state.

30. The method of claim 16, wherein the data transmission is repeated through a plurality of transmission configuration indicator (TCI) states.

31. A transmitting user equipment (UE), comprising: means for transmitting sidelink control information (SCI) reserving resources for a data transmission to at least one receiving UE through use of repetition over at least one of time or frequency; and means for transmitting data to the at least one receiving UE through use of repetition according to the SCI via at least first and second transmission reception points (TRPs) of the transmitting UE.

32. The transmitting UE of claim 31, wherein the repetition is achieved via time division multiplexing (TDM) in which the first and second TRPs transmit packets containing the data in different slots.

33. The transmitting UE of claim 32, further comprising means for selecting a TRP for transmission in a given slot randomly, through cycling through the TRPs, or through cycling through precoders allocating transmit power across the TRPs.

34. The transmitting UE of claim 31, wherein the data transmission comprises transmitting repetitions of a same transport block (TB) from different transmission configuration indicator (TCI) states within one resource reservation window.

35. The transmitting UE of claim 34, wherein the SCI comprises: a first stage SCI indicating time and frequency resources for the data transmission; and the TCI states are indicated via at least one of a second stage SCI or a medium access control (MAC) control element (CE).

36. The transmitting UE of claim 34, wherein: the data transmission comprises transmitting a redundancy version (RV) per hybrid automatic repeat request (HARQ) process or TCI state.

37. The transmitting UE of claim 31 or 32, wherein the repetitions are transmitted within the same slot.

38. The transmitting UE of claim 37, wherein at least one of: an RV iteration per repetition follows a particular pattern; or a second stage SCI is transmitted in each repetition.

39. The transmitting UE of claim 31, wherein the repetition is achieved via frequency division multiplexing (FDM) in which the first and second TRPs transmit packets containing the data in different slots.

40. The transmitting UE of claim 31, wherein the SCI is transmitted on a first subchannel with the data transmission.

41. The transmitting UE of claim 31, wherein: the SCI comprises an SCI repeated in both halves of a transmission.

42. The transmitting UE of claim 31, wherein one or more fields in the SCI indicate a resource reservation pattern for multiple TRPs, including transmission configuration indicator (TCI) states.

43. The transmitting UE of claim 31, wherein the SCI indicates resources for a precoding resource block group (PRG) narrowband resource allocation scheme.

44. The transmitting UE of claim 31, wherein the SCI indicates a similar wideband transmission configuration indicator (TCI) state.

45. The transmitting UE of claim 31, wherein the data transmission is repeated by multiple transmission configuration indicator (TCI) states.

46. A transmitting user equipment (UE), comprising: a transmitter configured to: transmit sidelink control information (SCI) reserving resources for a data transmission to at least one receiving UE by using repetition over at least one of time or frequency; and transmit data to the at least one receiving UE via at least first and second transmission reception points (TRPs) of the transmitting UE using repetition according to the SCI.

47. The transmitting UE of claim 46, wherein the repetition is achieved via time division multiplexing (TDM) in which the first and second TRPs transmit packets containing the data in different slots.

48. The transmitting UE of claim 47, the transmitter further configured to select a TRP for transmission in a given slot randomly, by cycling through the TRPs, or by cycling through precoders that allocate transmit power across the TRPs.

49. The transmitting UE of claim 46, wherein the data transmission comprises transmitting repetitions of a same transport block (TB) from different transmission configuration indicator (TCI) states within one resource reservation window.

50. The transmitting UE of claim 49, wherein the SCI comprises: a first stage SCI indicating time and frequency resources for the data transmission; and the TCI states are indicated via at least one of a second stage SCI or a medium access control (MAC) control element (CE).

51. The transmitting UE of claim 49, wherein: the data transmission comprises transmitting a redundancy version (RV) for each hybrid automatic repeat request (HARQ) process or TCI state.

52. The transmitting UE of claim 46 or 47, wherein the repetitions are transmitted within the same slot.

53. The transmitting UE of claim 52, wherein at least one of: an RV iteration of each repetition follows a particular pattern; or a second stage SCI is transmitted in each repetition.

54. The transmitting UE of claim 46, wherein the repetitions are achieved via frequency division multiplexing (FDM) in which the first and second TRPs transmit packets containing the data in different slots.

55. The transmitting UE of claim 46, wherein the SCI is transmitted on a first subchannel with the data transmission.

56. The transmitting UE of claim 46, wherein: the SCI comprises an SCI that is repeated in both halves of a transmission.

57. The transmitting UE of claim 46, wherein one or more fields in the SCI indicate a resource reservation pattern for multiple TRPs, including transmission configuration indicator (TCI) states.

58. The transmitting UE of claim 46, wherein the SCI indicates resources for a precoding resource block group (PRG) narrowband resource allocation scheme.

59. The transmitting UE of claim 46, wherein the SCI indicates a quasi-wideband transmission configuration indicator (TCI) state.

60. The transmitting UE of claim 46, wherein the data transmission is repeated through multiple transmission configuration indicator (TCI) states.

61. A receiving user equipment (UE), comprising: a receiver configured to receive, from a transmitting UE, sidelink control information (SCI) to reserve resources for a data transmission to at least a second UE through use of repetition over at least one of time or frequency; and a processing system configured to monitor for data transmitted from at least first and second transmission reception points (TRPs) of the transmitting UE through use of repetition according to the SCI.

62. The receiving UE of claim 61, wherein the repetition is achieved via time division multiplexing (TDM) in which the first and second TRPs transmit packets containing the data in different slots.

63. The receiving UE of claim 62, wherein the processing system configured to monitor is further configured to monitor for repetition from a TRP selected by the transmitting UE randomly for a transmission in a given slot, through cycling through the TRPs, or through cycling through precoders allocating transmit power across the TRPs.

64. The receiving UE of claim 61, wherein the processing system configured to monitor is further configured to monitor for repetition of a same transport block (TB) from different transmission configuration indicator (TCI) states within one resource reservation window.

65. The receiving UE of claim 64, wherein the SCI comprises: a first stage SCI indicating time and frequency resources for the data transmission; and the TCI states are indicated via at least one of a second stage SCI or a medium access control (MAC) control element (CE).

66. The receiving UE of claim 64, wherein: the processing system configured to monitor is further configured to monitor for a redundancy version (RV) per hybrid automatic repeat request (HARQ) process or TCI state; and the receiving UE further comprises a processing system configured to perform combining to process different repetitions based on the redundancy versions.

67. The receiving UE of claim 61, wherein the repetitions are received within a same slot.

68. The receiving UE of claim 67, wherein at least one of: an RV iteration per repetition follows a particular pattern; or a second stage SCI is received in each repetition.

69. The receiving UE of claim 61, wherein the repetition is achieved via frequency division multiplexing (FDM) in which the first and second TRPs transmit packets containing the data in different slots.

70. The receiver UE of claim 61 or 69, wherein the SCI is transmitted on a first subchannel with the data transmission.

71. The receiver UE of claim 61, wherein: the SCI comprises an SCI that is repeated in both halves of the transmission.

72. The receiver UE of claim 61, wherein one or more fields in the SCI indicate a resource reservation pattern for multiple TRPs, including transmission configuration indicator (TCI) states.

73. The receiver UE of claim 61, wherein the SCI indicates resources for a precoding resource block group (PRG) narrowband resource allocation scheme.

74. The receiver UE of claim 61, wherein the SCI indicates a transmission configuration indicator (TCI) state that is like a wideband.

75. The receiver UE of claim 61, wherein the data transmission is repeated by multiple transmission configuration indicator (TCI) states.

Images