Frequency domain resource allocation for frequency division multiplexing scheme with single downlink control information associated with multiple transmission configuration indication states

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive a downlink control information (DCI) message including a frequency domain resource allocation field indicating allocated resource blocks (RBs) across multiple transmission configuration indication (TCI) states. The UE may identify, based at least in part on the DCI message and / or a radio resource control configuration, at least one parameter indicating a contiguous RB unit and / or a resource allocation type on which the same precoding is used. The UE may assign an allocated RB to an individual TCI state among a plurality of TCI states based at least in part on the contiguous RB units and / or the resource allocation type on which the same precoding is used. Numerous other aspects are provided.

Description

[0001] This application is a divisional application of a patent application with an international application date of May 13, 2020, an international application number of PCT / US2020 / 032671, a Chinese national application date of May 13, 2020, an application number of 202080044341.2, and an invention name of "Frequency domain resource allocation for a frequency division multiplexing scheme with a single downlink control information associated with multiple transmission configuration indication states."

[0002] CROSS-REFERENCE TO RELATED APPLICATIONS

[0003] This application claims the benefit of U.S. Provisional Application No. 62 / 865,730, filed on June 24, 2019, entitled “FREQUENCY DOMAIN RESOURCE ALLOCATION FOR FREQUENCY DIVISION MULTIPLEXING SCHEMES WITH SINGLE DOWNLINK CONTROL INFORMATION ASSOCIATED WITH MULTIPLE TRANSMISSION CONFIGURATION INDICATION STATES,” and U.S. Provisional Application No. 62 / 865,730, filed on June 24, 2019, entitled “FREQUENCY DOMAIN RESOURCE ALLOCATION FOR FREQUENCY DIVISION MULTIPLEXING SCHEMES WITH SINGLE DOWNLINK CONTROL INFORMATION ASSOCIATED WITH MULTIPLE TRANSMISSION CONFIGURATION INDICATION STATES,” and U.S. Provisional Application No. 62 / 865,730, filed on February 27, 2020, entitled “FREQUENCY DOMAIN RESOURCE ALLOCATION FOR FREQUENCY DIVISION MULTIPLEXING SCHEMES WITH SINGLE DOWNLINK CONTROL INFORMATION ASSOCIATED WITH MULTIPLE TRANSMISSION CONFIGURATION INDICATION STATES (Frequency Domain Resource Allocation for a Frequency Division Multiplexing Scheme with a Single Downlink Control Information Associated with Multiple Transmission Configuration Indication States)" U.S. Non-Provisional Patent Application No. 16 / 803,732, which applications are hereby expressly incorporated herein by reference.

[0004] Public domain

[0005] Aspects of the present disclosure relate generally to wireless communications and to techniques and devices for assigning a frequency domain resource allocation (FDRA) indicated in a single downlink control information (DCI) message to multiple transmission configuration indication (TCI) states. background

[0007] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing 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 (3GPP).

[0008] A wireless communication network may include several base stations (BS) that can support communication of several user equipments (UEs). User equipments (UEs) may communicate with base stations (BSs) via downlinks and uplinks. Downlinks (or forward links) refer to the communication link from a BS to a UE, while uplinks (or reverse links) refer to the communication link from a UE to a BS. As will be described in more detail herein, a BS may be referred to as a Node B, a gNB, an Access Point (AP), a Radio Head, a Transmit Receive Point (TRP), a New Radio (NR) BS, a 5G Node B, and the like.

[0009] The above multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different user equipment to communicate at city, country, region, and even global levels. New Radio (NR) (which may also be referred to as 5G) is an enhancement set to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink (DL), using CP-OFDM and / or SC-FDM (e.g., also referred to as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), and supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation to better integrate with other open standards. However, as the demand for mobile broadband access continues to grow, there is a need for further improvements in LTE and NR technologies. Preferably, these improvements should be applicable to other multiple access technologies and telecommunication standards that employ these technologies.

[0010] Overview

[0011] In some aspects, a wireless communication method performed by a user equipment (UE) may include: receiving a downlink control information (DCI) message including a frequency domain resource allocation (FDRA) field, the FDRA field indicating allocated resource blocks (RBs) across multiple transmission configuration indication (TCI) states; identifying at least one parameter indicating consecutive RB units on which the same precoding is used based at least in part on the DCI message or one or more of a radio resource control (RRC) configuration, wherein the at least one parameter includes one or more of a precoding RB group (PRG) size or a physical RB (PRB) bundle size; and assigning the allocated RBs to individual TCI states among the multiple TCI states based at least in part on the at least one parameter indicating the consecutive RB units on which the same precoding is used.

[0012] In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: receive a DCI message including an FDRA field indicating allocated RBs across multiple TCI states; identify at least one parameter indicating consecutive RB units on which the same precoding is used based at least in part on one or more of the DCI message or an RRC configuration, wherein the at least one parameter includes one or more of a PRG size or a PRB bundle size; and assign the allocated RBs to individual TCI states among the multiple TCI states based at least in part on the at least one parameter indicating the consecutive RB units on which the same precoding is used.

[0013] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to: receive a DCI message including an FDRA field indicating allocated RBs across multiple TCI states; identify at least one parameter indicating consecutive RB units on which the same precoding is used based at least in part on one or more of the DCI message or an RRC configuration, wherein the at least one parameter includes one or more of a PRG size or a PRB bundle size; and assign the allocated RBs to individual TCI states among the multiple TCI states based at least in part on the at least one parameter indicating the consecutive RB units on which the same precoding is used.

[0014] In some aspects, an apparatus for wireless communication may include: a device for receiving a DCI message including an FDRA field indicating allocated RBs across multiple TCI states; a device for identifying at least one parameter indicating consecutive RB units on which the same precoding is used based at least in part on the DCI message or one or more of an RRC configuration, wherein the at least one parameter includes one or more of a PRG size or a PRB bundle size; and a device for assigning the allocated RBs to individual TCI states among the multiple TCI states based at least in part on the at least one parameter indicating the consecutive RB units on which the same precoding is used.

[0015] In some aspects, a wireless communication method performed by a UE may include: receiving a DCI message including an FDRA field indicating allocated RBs across multiple TCI states; identifying at least one parameter indicating a resource allocation type based at least in part on the DCI message or one or more of the RRC configurations; and assigning the allocated RBs to individual TCI states among the multiple TCI states based at least in part on the resource allocation type.

[0016] In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: receive a DCI message including an FDRA field indicating allocated RBs across multiple TCI states; identify at least one parameter indicating a resource allocation type based at least in part on one or more of the DCI message or an RRC configuration; and assign the allocated RBs to individual TCI states among the multiple TCI states based at least in part on the resource allocation type.

[0017] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to: receive a DCI message including an FDRA field indicating allocated RBs across multiple TCI states; identify at least one parameter indicating a resource allocation type based at least in part on one or more of the DCI message or an RRC configuration; and assign the allocated RBs to individual TCI states among the multiple TCI states based at least in part on the resource allocation type.

[0018] In some aspects, an apparatus for wireless communication may include: a device for receiving a DCI message including an FDRA field indicating allocated RBs across multiple TCI states; a device for identifying at least one parameter indicating a resource allocation type based at least in part on the DCI message or one or more of an RRC configuration; and a device for assigning the allocated RBs to individual TCI states among the multiple TCI states based at least in part on the resource allocation type.

[0019] Aspects generally include methods, apparatuses, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, transmission reception points, wireless communication devices, and / or processing systems as substantially described herein with reference to the accompanying drawings and description and as illustrated in the accompanying drawings and description.

[0020] The foregoing has broadly outlined the features and technical advantages of examples according to the present disclosure in an effort to make the following detailed description better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples can be easily used as a basis for modifying or designing other structures for implementing the same purpose as the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both in terms of their organization and method of operation, and the associated advantages will be better understood by considering the following description in conjunction with the accompanying drawings. Each of the accompanying drawings is provided for the purpose of illustration and description and is not intended to define limitations on the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to understand the above-stated features of the present disclosure in detail, the above briefly summarized content may be described in more detail with reference to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the accompanying drawings only illustrate certain typical aspects of the present disclosure and should not be considered to limit its scope, as the description may allow for other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0023] Figure 1 is a block diagram conceptually illustrating an example of a wireless communication network in accordance with various aspects of the present disclosure.

[0024] Figure 2 is a block diagram conceptually illustrating an example of a base station in communication with a user equipment (UE) in a wireless communication network according to various aspects of the present disclosure.

[0025] Figure 3A is a block diagram conceptually illustrating an example of a frame structure in a wireless communication network in accordance with various aspects of the present disclosure.

[0026] Figure 3Bis a block diagram conceptually illustrating an example synchronous communication hierarchy in a wireless communication network in accordance with various aspects of the present disclosure.

[0027] Figure 4 is a block diagram conceptually illustrating an example slot format with a normal cyclic prefix in accordance with various aspects of the present disclosure.

[0028] Figure 5 An example logical architecture of a distributed radio access network (RAN) in accordance with various aspects of the present disclosure is illustrated.

[0029] Figure 6 An example physical architecture of a distributed RAN in accordance with various aspects of the present disclosure is illustrated.

[0030] Figure 7 is a diagram illustrating an example of multiple transmission reception point (TRP) communications using a single downlink control information (DCI) according to various aspects of the present disclosure.

[0031] Figure 8 is a diagram illustrating an example of frequency domain resource allocation (FDRA) according to various aspects of the present disclosure.

[0032] Figures 9A-9B is a diagram illustrating an example of multi-TRP communication according to various aspects of the present disclosure, wherein the UE assigns the allocated FDRA indicated in a single DCI message to different transmission configuration indication (TCI) states based on the size associated with the precoding resource block group (PRG) and / or physical resource block (PRB) bundle.

[0033] Figures 10A-10E is a diagram illustrating an example of multi-TRP communication according to various aspects of the present disclosure, wherein the UE assigns the allocated FDRA indicated in a single DCI message to different TCI states based on the resource allocation type.

[0034] Figure 11-12 is a diagram illustrating example processes performed, for example, by a UE according to various aspects of the present disclosure. Detailed Description

[0036] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be implemented in many different forms and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. On the contrary, these aspects are provided to make the present disclosure thorough and complete, and it will fully convey the scope of the present disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art will appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether it is implemented independently or in combination with any other aspect of the present disclosure. For example, any number of aspects set forth herein can be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods practiced using supplements or other other structures, functionality, or structures and functionality as the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein can be implemented by one or more elements of the claims.

[0037] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or a 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.

[0038] It should be noted that although various aspects may be described herein using terminology typically associated with 3G and / or 4G wireless technologies, various aspects of the present disclosure may be applied in communication systems based on other generations, such as 5G and later generations, including NR technologies.

[0039] Figure 1 1 is a diagram illustrating a wireless network 100 in which various aspects of the present disclosure may be practiced. The wireless network 100 may be an LTE network or some other wireless network, such as a 5G or NR network. The wireless network 100 may include several BSs 110 (shown as BSs 110a, BSs 110b, BSs 110c, and BSs 110d) and other network entities. A BS is an entity that communicates with a user equipment (UE) and may also be referred to as a base station, NRBS, B node, gNB, 5G B node (NB), access point, transmit receive point (TRP), and the like. Each BS may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0040] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown in , BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. The BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "B node", "5G NB", and "cell" may be used interchangeably herein.

[0041] In some aspects, the cells may not necessarily be stationary, and the geographic area of ​​the cells may move depending on the location of the mobile BS. In some aspects, the BSs may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces, such as direct physical connections, virtual networks, and / or the like using any suitable transport network.

[0042] The wireless network 100 may also include a relay station. A relay station is an entity that can receive transmissions of data from an upstream station (e.g., a BS or a UE) and send transmissions of the data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown in , a relay station 110d may communicate with a macro BS 110a and a UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay station may also be referred to as a relay BS, a relay base station, a relay, or the like.

[0043] The wireless network 100 may be a heterogeneous network including different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0044] A network controller 130 may be coupled to a set of BSs and may provide coordination and control of these BSs. The network controller 130 may communicate with each BS via a backhaul. The BSs may also communicate with each other directly or indirectly, for example, via a wireless or wired backhaul.

[0045] UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile. UEs may also be referred to as access terminals, terminals, mobile stations, subscriber units, stations, etc. A UE may be a cellular phone (e.g., a smart phone), 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, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0046] Some UEs may be considered as machine type communication (MTC) UEs, or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which may communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node may provide connectivity to or to a network (e.g., a wide area network (such as the Internet) or a cellular network), for example, via a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as client equipment (CPE). UE 120 may be included inside a housing that houses components of UE 120, such as a processor component, a memory component, and the like.

[0047] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific RAT and may operate on one or more frequencies. RAT may also be referred to as radio technology, air interface, etc. Frequency may also be referred to as carrier, frequency channel, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0048] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using base station 110 as an intermediary to communicate with each other) using one or more sidelink channels. For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, etc.), mesh networks, etc. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0049] As indicated above, Figure 1 are provided as examples. Other examples may differ from those described in Figure 1 Examples described.

[0050] Figure 2 A block diagram of a design 200 of a base station 110 and a UE 120 is shown, which may be Figure 1 One for each base station and one for each UE in the base station 110. Base station 110 may be equipped with T antennas 234a through 234t, and UE 120 may be equipped with R antennas 252a through 252r, where in general T≧1 and R≧1.

[0051] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS)) and synchronization signals (e.g., primary synchronization signals (PSS) and secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and may provide T output symbol streams to T modulators (MOD) 232a to 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t may be transmitted via T antennas 234a to 234t, respectively. According to various aspects described in more detail below, position coding may be used to generate synchronization signals to convey additional information.

[0052] At UE 120, antennas 252a to 252r may receive downlink signals from base station 110 and / or other base stations and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller / processor 280. The channel processor may determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of UE 120 may be included in a housing.

[0053] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. At the base station 110, uplink signals from the UE 120 as well as other UEs may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236, if applicable, and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide decoded data to a data sink 239 and provide decoded control information to a controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292.

[0054] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2Any other component(s) of the base station 110 may perform one or more techniques associated with frequency domain resource allocation (FDRA) for a frequency division multiplexing (FDM) scheme with a single downlink control information (DCI) associated with multiple transmission configuration indication (TCI) states, as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component(s) may perform or direct e.g. Fig.11 Process 1100, Fig.12 The operations of the process 1200, and / or other processes as described herein. The memories 242 and 282 may store data and program codes for the base station 110 and the UE 120, respectively. In some aspects, the memory 242 and / or the memory 282 may include: a non-transitory computer-readable medium storing one or more instructions for wireless communication. For example, the one or more instructions, when executed by one or more processors of the base station 110 and / or the UE 120, may perform or direct, for example Fig.11 Process 1100, Fig.12 The scheduler 246 may schedule UEs for data transmission on the downlink and / or uplink.

[0055] In some aspects, UE 120 may include: means for receiving a DCI message including an FDRA field indicating allocated resource blocks (RBs) across multiple TCI states; means for identifying at least one parameter indicating a unit of consecutive RBs on which the same precoding is used based at least in part on one or more of the DCI message or a radio resource control (RRC) configuration; means for assigning the allocated RBs to individual TCI states among the multiple TCI states based at least in part on the at least one parameter indicating the unit of consecutive RBs on which the same precoding is used; and the like. In some aspects, such means may include combining Figure 2 One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and the like.

[0056] Additionally or alternatively, in some aspects, UE 120 may include: means for receiving a DCI message including an FDRA field indicating allocated RBs across multiple TCI states; means for identifying at least one parameter indicating a resource allocation type based at least in part on one or more of the DCI message or an RRC configuration; means for assigning the allocated RBs to individual TCI states in the multiple TCI states based at least in part on the resource allocation type; and the like. In some aspects, such means may include combining Figure 2 One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and the like.

[0057] As indicated above, Figure 2 are provided as examples. Other examples may differ from those described in Figure 2 Examples described.

[0058] Figure 3A An example frame structure 300 for frequency division duplex (FDD) in a telecommunication system (e.g., NR) is shown. The transmission timeline for each of the downlink and uplink may be divided into units of radio frames (sometimes referred to as frames). Each radio frame may have a predetermined duration (e.g., 10 milliseconds (ms)) and may be divided into a set of Z (Z ≥ 1) subframes (e.g., with indices 0 to Z-1). Each subframe may have a predetermined duration (e.g., 1 ms) and may include a set of time slots (e.g., in Figure 3A Each subframe 2 is shown m time slots, where m is a parameter design for transmission, such as 0, 1, 2, 3, 4, etc.). Each time slot may include a set of L symbol periods. For example, each time slot may include fourteen symbol periods (e.g., Figure 3A ), seven symbol periods, or another number of symbol periods. In the case where a subframe includes two slots (e.g., when m=1), the subframe may include 2L symbol periods, where the 2L symbol periods in each subframe may be assigned indices 0 to 2L–1. In some aspects, the scheduling unit for FDD may be frame-based, subframe-based, slot-based, symbol-based, etc.

[0059] Although some techniques are described herein in conjunction with frames, subframes, time slots, etc., these techniques may be equally applicable to other types of wireless communication structures that may be referred to in 5G NR using terms other than "frames," "subframes," "time slots," etc. In some aspects, a wireless communication structure may refer to a periodic, time-bounded communication unit defined by a wireless communication standard and / or protocol. Additionally or alternatively, a wireless communication structure may be used in conjunction with Figure 3A The wireless communication structure configurations are different from those shown in FIG.

[0060] In some telecommunications (e.g., NR), a base station may transmit synchronization signals. For example, a base station may transmit a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and the like on the downlink for each cell supported by the base station. The PSS and SSS may be used by the UE for cell search and acquisition. For example, the PSS may be used by the UE to determine symbol timing, and the SSS may be used by the UE to determine a physical cell identifier associated with the base station and frame timing. The base station may also transmit a physical broadcast channel (PBCH). The PBCH may carry some system information, such as system information that supports initial access of the UE.

[0061] In some aspects, a base station may transmit a PSS, SSS, and / or PBCH according to a synchronization communication level (e.g., a synchronization signal (SS) level) including multiple synchronization communications (e.g., SS blocks), as described below in conjunction with Figure 3B as described.

[0062] Figure 3B is a block diagram conceptually illustrating an example SS hierarchy, which is an example of a synchronous communication hierarchy. Figure 3B As shown in FIG. 1 , the SS hierarchy may include an SS burst set, which may include a plurality of SS bursts (identified as SS burst 0 to SS burst B-1, where B is the maximum number of repetitions of the SS burst that may be transmitted by the base station). As further shown, each SS burst may include one or more SS blocks (identified as SS block 0 to SS block (b max_SS -1), where b max_SS -1 is the maximum number of SS blocks that can be carried by an SS burst). In some aspects, different SS blocks may be beamformed differently. SS burst sets may be transmitted by a wireless node periodically, such as every X milliseconds, e.g. Figure 3B In some aspects, SS burst sets may have fixed or dynamic lengths, such as in Figure 3B is shown as Y milliseconds.

[0063] Figure 3B The SS burst set shown in is an example of a synchronous communication set, and other synchronous communication sets may be used in conjunction with the techniques described herein. Figure 3BThe SS blocks shown in are examples of synchronous communications, and other synchronous communications may be used in conjunction with the techniques described herein.

[0064] In some aspects, an SS block includes resources that carry PSS, SSS, PBCH, and / or other synchronization signals (e.g., a third synchronization signal (TSS)) and / or synchronization channels. In some aspects, multiple SS blocks are included in an SS burst, and the PSS, SSS, and / or PBCH may be identical for each SS block across an SS burst. In some aspects, a single SS block may be included in an SS burst. In some aspects, an SS block may be at least four symbol periods in length, with each symbol carrying one or more of a PSS (e.g., occupying one symbol), an SSS (e.g., occupying one symbol), and / or a PBCH (e.g., occupying two symbols).

[0065] In some aspects, the symbols of the SS block are consecutive, such as Figure 3B In some aspects, the symbols of the SS block are non-contiguous. Similarly, in some aspects, one or more SS blocks of an SS burst may be transmitted in contiguous radio resources (e.g., contiguous symbol periods) during one or more time slots. Additionally or alternatively, one or more SS blocks of an SS burst may be transmitted in non-contiguous radio resources.

[0066] In some aspects, an SS burst may have a burst periodicity, whereby each SS block of the SS burst is transmitted by the base station according to the burst periodicity. In other words, the SS blocks may be repeated during each SS burst. In some aspects, an SS burst set may have a burst set periodicity, whereby each SS burst of the SS burst set is transmitted by the base station according to a fixed burst set periodicity. In other words, the SS burst may be repeated during each SS burst set.

[0067] The base station may transmit system information, such as system information blocks (SIBs), on a physical downlink shared channel (PDSCH) in certain time slots. The base station may transmit control information / data on a physical downlink control channel (PDCCH) in C symbol periods of a time slot, where B may be configurable for each time slot. The base station may transmit traffic data and / or other data on the PDSCH in the remaining symbol periods of each time slot.

[0068] As indicated above, Figure 3A and 3B are provided as examples. Other examples may differ from those described in Figure 3A and 3B Examples described.

[0069] Figure 4An example slot format 410 with a normal cyclic prefix is ​​shown. Available time-frequency resources may be divided into resource blocks. Each resource block may cover a set of subcarriers (e.g., 12 subcarriers) in one slot and may include several resource elements. Each resource element may cover one subcarrier in one symbol period (e.g., in time) and may be used to send one modulation symbol, which may be a real value or a complex value.

[0070] For FDD in certain telecommunication systems (e.g., NR), an interleaving structure may be used for each of the downlink and uplink. For example, Q interleavings with indices 0 to Q–1 may be defined, where Q may be equal to 4, 6, 8, 10, or some other value. Each interleaving may include time slots spaced apart by Q frames. Specifically, interleaving q may include time slots q, q+Q, q+2Q, etc., where q∈{0,…,Q–1}.

[0071] The UE may be located within the coverage of multiple BSs. One of these BSs may be selected to serve the UE. The serving BS may be selected based at least in part on various criteria such as received signal strength, received signal quality, path loss, etc. The received signal quality may be quantified by a signal-to-noise-and-interference ratio (SNIR), or a reference signal received quality (RSRQ), or some other metric. The UE may operate in a strong interference scenario, in which the UE may observe high interference from one or more interfering BSs.

[0072] Although aspects of the examples described herein may be associated with NR or 5G technology, aspects of the present disclosure may be applicable to other wireless communication systems. A new radio (NR) may refer to a radio configured to operate according to a new air interface (e.g., an air interface different from an orthogonal frequency division multiple access (OFDMA)-based air interface) or a fixed transport layer (e.g., different from an Internet Protocol (IP)). In various aspects, NR may utilize OFDM with CP (referred to herein as cyclic prefix OFDM or CP-OFDM) and / or SC-FDM on the uplink, may utilize CP-OFDM on the downlink and include support for half-duplex operation using time division duplex (TDD). In various aspects, NR may, for example, utilize OFDM with CP (referred to herein as CP-OFDM) and / or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) on the uplink, may utilize CP-OFDM on the downlink and include support for half-duplex operation using TDD. NR may include enhanced mobile broadband (eMBB) services targeting wide bandwidth (e.g., 80 megahertz (MHz) and above), millimeter wave (mmW) targeting high carrier frequencies (e.g., 60 gigahertz (GHz)), massive MTC (mMTC) targeting non-backward compatible MTC technologies, and / or mission critical services targeting ultra-reliable low latency communications (URLLC) services.

[0073] In some aspects, a single component carrier bandwidth of 100 MHz may be supported. NR resource blocks may span 12 subcarriers with a subcarrier bandwidth of 60 or 120 kilohertz (kHz) over a duration of 0.1 milliseconds (ms). Each radio frame may include 40 slots and may have a length of 10 ms. Thus, each slot may have a length of 0.25 ms. Each slot may indicate a link direction (e.g., DL or UL) for data transmission and the link direction for each slot may be switched dynamically. Each slot may include DL / UL data and DL / UL control data.

[0074] Beamforming may be supported and the beam direction may be dynamically configured. MIMO transmission with precoding may also be supported. MIMO configuration in DL may support up to 8 transmit antennas (multi-layer DL transmission with up to 8 streams) and up to 2 streams per UE. Multi-layer transmission with up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported using up to 8 serving cells. Alternatively, NR may support different air interfaces other than OFDM-based interfaces. NR networks may include entities such as central units or distributed units.

[0075] As indicated above, Figure 4 are provided as examples. Other examples may differ from those described in Figure 4 Examples described.

[0076] Figure 5 An example logical architecture of a distributed RAN 500 according to various aspects of the present disclosure is illustrated. A 5G access node 506 may include an access node controller (ANC) 502. The ANC may be a central unit (CU) of the distributed RAN 500. A backhaul interface to a next generation core network (NG-CN) 504 may terminate at the ANC. A backhaul interface to an adjacent next generation access node (NG-AN) may terminate at the ANC. The ANC may include one or more TRPs 508 (which may also be referred to as a BS, NR BS, B node, 5G NB, AP, gNB, or some other term). As described above, a TRP may be used interchangeably with a "cell".

[0077] The TRP 508 may be a distributed unit (DU). The TRP may be connected to one ANC (ANC 502) or more than one ANC (not illustrated). For example, for RAN sharing, Radio as a Service (RaaS), and service-specific AND deployments, the TRP may be connected to more than one ANC. The TRP may include one or more antenna ports. The TRP may be configured to serve traffic to the UE individually (e.g., dynamically selected) or jointly (e.g., jointly transmitted).

[0078] The fronthaul definition may be illustrated using the local architecture of the RAN 500. The architecture may be defined to support fronthaul solutions across different deployment types. For example, the architecture may be based at least in part on transport network capabilities (e.g., bandwidth, latency, and / or jitter).

[0079] The architecture may share features and / or components with LTE. According to various aspects, the next generation AN (NG-AN) 510 may support dual connectivity with NR. For LTE and NR, the NG-AN may share a common fronthaul.

[0080] The architecture may enable collaboration between and among TRPs 508. For example, collaboration may be preset within a TRP and / or across TRPs via ANC 502. According to various aspects, an inter-TRP interface may not be required / present.

[0081] According to various aspects, there may be a dynamic configuration of split logical functions within the architecture of the RAN 500. Packet Data Convergence Protocol (PDCP), Radio Link Control (RLC), Medium Access Control (MAC) protocols may be adaptively placed at the ANC or TRP.

[0082] According to various aspects, a BS may include a central unit (CU) (e.g., ANC 502) and / or one or more distributed units (e.g., one or more TRPs 508).

[0083] As indicated above, Figure 5 are provided as examples. Other examples may differ from those described in Figure 5 Examples described.

[0084] Figure 6 An example physical architecture of a distributed RAN 600 according to aspects of the present disclosure is illustrated. A centralized core network unit (C-CU) 602 may host core network functions. The C-CU may be centrally deployed. C-CU functionality may be offloaded (e.g., to Advanced Wireless Services (AWS)) in an effort to handle peak capacity.

[0085] A centralized RAN unit (C-RU) 604 may host one or more ANC functions. Optionally, the C-RU may host core network functions locally. The C-RU may have a distributed deployment. The C-RU may be closer to the network edge.

[0086] A distributed unit (DU) 606 may host one or more TRPs. A DU may be located at the edge of the network with radio frequency (RF) functionality.

[0087] As indicated above, Figure 6 are provided as examples. Other examples may differ from those described in Figure 6 Examples described.

[0088] Figure 7 is a diagram illustrating an example 700 of multiple transmission reception point (TRP) communications using a single downlink control information (DCI) in accordance with various aspects of the present disclosure.

[0089] like Figure 7 As shown in FIG, multiple TRPs 110 (shown as TRP1 110a and TRP2 110b) may communicate with the same UE 120 in a coordinated manner (e.g., using coordinated multipoint transmission, etc.) to improve reliability, increase throughput, etc. The TRPs 110 may coordinate these communications via a backhaul, which may have less latency or higher capacity when the TRPs 110 are co-located (e.g., where each TRP 110 corresponds to a different antenna array of a particular base station), or may have greater latency or lower capacity when the TRPs 110 are not co-located (e.g., located at different base stations).

[0090] In some aspects, TRP1 110a and TRP2 110b may be referred to herein as a multi-TRP group. As used herein, a multi-TRP group may refer to: a group of TRPs to communicate with the same UE, a group of TRPs managed as a group by an access node controller, a group of TRPs that transmit the same physical downlink shared channel (PDSCH), a group of TRPs that transmit individual PDSCHs simultaneously or contemporaneously, and the like.

[0091] TRP 110 may also be referred to as a BS, NR BS, B node, 5G NB, AP, gNB, panel, remote radio head (RRH) or some other term, or may also be used interchangeably with "cell". In some aspects, multiple TRPs 110 may be included in a single BS (e.g., using corresponding antenna panels or quasi-co-located (QCL) relationships). In some aspects, different TRPs 110 may be included in different BSs. TRP 110 may use one or more antenna ports. A group of TRPs 110 (e.g., TRP1110a and TRP2 110b) may be configured to serve traffic to UE 120 individually (such as using dynamic selection) or jointly (such as using joint transmission). TRP 110 may coordinate or collaborate via an access node controller (ANC). In some aspects, an inter-TRP interface may not be required or exist.

[0092] As in Figure 7 In the example and as indicated by reference numeral 702, a group of TRPs 110 may operate in a single downlink control information (DCI) mode, wherein a UE 120 receives a single physical downlink control channel (PDCCH) from one TRP 110 (e.g., TRP1 110a in the illustrated example 700), and the single PDCCH schedules subsequent communications from each TRP 110 in the multi-TRP group (e.g., TRP1 110a and TRP2 110b in the illustrated example 700). For example, as in Figure 7 , and further indicated by reference numeral 704, the subsequent communication may be a physical downlink shared channel (PDSCH), which may be common between TRP1 110a and TRP2 110b or may be different (e.g., different payload, different modulation and / or coding scheme, different transmit power, different repetition scheme, etc.). In some aspects, as mentioned above, the multiple TRPs 110a, 110b may be different panels of a particular base station, may be associated with the same or different cell identifiers, may have the same or different physical cell identities (PCIs), etc. However, from the perspective of the UE 120, the transmissions from the multiple TRPs 110a, 110b are observed as different beams or transmissions with different transmission configuration indicator (TCI) states.

[0093] According to various aspects, there are different schemes that can be used for communication between multiple TRP groups and UE 120. For example, in some aspects, TRPs 110a, 110b can communicate with UE 120 according to a spatial division multiplexing (SDM) scheme, in which the TRPs 110a, 110b can use different spatial layers (e.g., different multiple-input multiple-output (MIMO) layers) to transmit PDSCH in overlapping resource blocks (RBs) and / or symbols. In another example, TRPs 110a, 110b can communicate with UE 120 according to a time division multiplexing (TDM) scheme, in which multiple TRPs 110a, 110b transmit PDSCH in different OFDM symbols, different time slots, etc. In another example, the TRPs 110, 110b may communicate with the UE 120 according to a frequency division multiplexing (FDM) scheme in which multiple TRPs 110a, 110b transmit PDSCHs in different RBs.

[0094] like Figure 7 As further shown in the example 700, the PDCCH received from TRP1 110a may include or otherwise be associated with a single DCI message that may include a frequency domain resource allocation (FDRA) field to indicate an aggregate RB allocation across multiple TCI states (e.g., across a first TCI state associated with TRP1 110a, a second TCI state associated with TRP2 110b, etc.). Accordingly, as shown by reference numeral 706, the UE 120 may apply a frequency division multiplexing (FDM) scheme based on the RB allocation to receive RB sets associated with multiple TCI states when the TRPs 110, 110b communicate with the UE 120 according to the FDM scheme. For example, as shown by reference numeral 708, the FDM scheme in the illustrated example 700 includes two RB sets (labeled as RB set 1 and RB set 2) on the same OFDM symbol, and each TRP 110 transmits one of the RB sets. For example, TRP1 110a may transmit RB set 1 and TRP2 110b may transmit RB set 2, whereby each non-overlapping frequency resource allocation (e.g., RB set) may be associated with one TCI state. In general, RB sets may have the same number of layers, the same set of demodulation reference signal (DMRS) ports, the same OFDM symbols, etc. From the perspective of UE 120, there are two schemes that may be used to receive two RB sets from TRPs 110a, 110b.

[0095] For example, in a first approach as shown by reference numeral 710, there is one codeword 712 with one redundancy version (RV) used across the aggregate resource allocation. Accordingly, the UE 120 observes this one (large) codeword 712, and different coded bits in the codeword 712 are mapped to different RBs. For example, after the UE 120 has demodulated the codeword 712, the demodulated codeword 712 is first mapped in frequency and then mapped in time. In the first approach shown by reference numeral 710, some coded bits in the demodulated codeword 712 are mapped to RB set 1 and some coded bits are mapped to RB set 2.

[0096] In some aspects, in a second scheme as shown by reference numeral 714, each RB set is associated with a different codeword of the same transport block (TB), wherein one RV is used for each non-overlapping frequency resource allocation. Figure 7 In the second scheme, the first codeword 716 and the second codeword 718 are in the same circular buffer, which means that the data in the circular buffer is encoded and different RVs are used to read the data from the circular buffer. For the mapping to the RB sets, the coded bits of the first codeword 716 are mapped to RB set 1, and the coded bits of the second codeword 718 are mapped to RB set 2.

[0097] Accordingly, from the perspective of UE 120, a particular TCI state is generally applicable to a particular set of RBs, and each TCI state may correspond to beam information, quasi-co-located (QCL) information, etc. associated with a corresponding TRP 110. In some aspects, as described in more detail elsewhere herein, UE 120 can therefore determine a mapping from an FDRA indicated in a single DCI message to different TCI states that may be associated with different TRPs 110.

[0098] As indicated above, Figure 7 are provided as examples. Other examples may differ from those described herein. Figure 7 Examples described.

[0099] Figure 8 8 is a diagram illustrating an example 800 of a frequency domain resource allocation (FDRA) according to various aspects of the present disclosure. For example, in some aspects, the FDRA may be associated with a resource allocation type, which may be indicated in a parameter associated with a DCI message, a radio resource control (RRC) configuration, etc. In general, the resource allocation type may include a first type (type 0) based on a resource block group (RBG) or a second type (type 1) based on a virtual resource block (VRB) mapped to a physical resource block (PRB). In addition, the second type of resource allocation may include a first sub-type (without interleaving) and a second sub-type (with interleaving).

[0100] For example, when the resource allocation type is RBG-based (type 0), the total number of RBGs in a bandwidth part (BWP) may be represented as N_RBG, in which case the FDRA field (e.g., in a DCI message, RRC configuration message, etc., that schedules the PDSCH) may be a bitmap of size N_RBG, indicating the scheduled RBGs among all N_RBG RBGs in the BWP. Each bit in the bitmap may be applied to one RBG. For example, a bitmap (or bit string) of "00110100000" may indicate that the third, fourth, and sixth RBGs are scheduled based on the third, fourth, and sixth bits having a value of one (1), and all other RBGs may not be scheduled based on the other bits having a value of zero (0). In some aspects, the RBG size represented by P may generally refer to the number of RBs that can be included in one RBG, and P may be {2, 4, 8, 16} RBs depending on the BWP size, RRC configuration, etc.

[0101] In other examples, when resource allocation is based on mapping from the VRB domain to the PRB domain (Type 1), the FDRA field effectively indicates the starting RB in the VRB domain and the number of scheduled RBs or allocated RBs in the VRB domain. Accordingly, since the scheduled RBs or allocated RBs are always continuous in the VRB domain, the aggregated FDRA in the VRB domain can be derived based on the starting RB and the number of scheduled RBs or allocated RBs. For example, as in Figure 8 8 and as shown by reference numerals 810 and 812, the FDRA field may indicate that the starting RB is RB1 and the number of scheduled RBs or allocated RBs is 4. In this case, the UE may determine that the allocated RBs (in the VRB domain) include RBs 1-4 based on a configuration in which the scheduled RBs or allocated RBs are contiguous in the VRB domain.

[0102] Additionally, in some aspects, the DCI message may include a VRB-PRB mapping field, which may be set to zero (0) to indicate that the VRB-PRB mapping is non-interleaved or set to one (1) to indicate that the VRB-PRB mapping is interleaved. Figure 8 , reference numeral 810 illustrates a VRB n Mapped to PRB nof the non-interleaved case, which results in a mapping in which PRBs are also continuous because VRBs are continuous. In other words, when the VRB-PRB mapping is non-interleaved, the allocation of PRBs is equivalent to the allocation of VRBs. However, if the VRB-PRB mapping field is set to one (1), this may indicate that the PRBs are mapped to VRBs according to the function f(.), in which case RB bundles are formed in the VRB domain and the PRB domain in a given BWP. Each RB bundle may have a specific size L, which may be provided in an upper layer parameter (e.g., a vrb-to-PRB-Interleaver parameter provided in the RRC configuration) and have a value of 2 or 4 RBs. Accordingly, as in Figure 8 8 and indicated by reference numeral 812, the allocated PRBs may be non-contiguous in the interleaving case, where VRB cluster j is mapped to PRB cluster f(j) based on function f(.). However, in the case where FDRA schedules or otherwise allocates all available VRB clusters in a BWP, all available PRBs in the BWP are also scheduled or otherwise allocated. In this case, the PRBs may appear to be contiguous, even though an interleaving function is still used to map the scheduled VRB clusters to the PRB clusters.

[0103] As indicated above, Figure 8 are provided as examples. Other examples may differ from those described herein. Figure 8 Examples described.

[0104] Figures 9A-9B 900 is a diagram illustrating an example of multi-TRP communication according to various aspects of the present disclosure, wherein the UE assigns the allocated FDRA indicated in a single DCI message to different TCI states based on the size associated with the precoding resource block group (PRG) and / or PRB cluster. Specifically, as used herein, the terms PRG, PRB cluster, etc. can interchangeably refer to a continuous RB unit (in the PRB domain) on which the UE can assume the use of the same precoding; therefore, PRG, PRB cluster, etc. can be used as a unit for joint channel estimation.

[0105] Accordingly, as in Fig. 9AIn and as shown by reference numeral 902, a UE 120 may receive a DCI message having an FDRA field from a TRP in a multi-TRP group, the FDRA field indicating an aggregated RB allocation across multiple TCI states. For example, in example 900, there are two TRPs 110a, 110b, whereby a DCI message received from TRP 110a may indicate an aggregated RB allocation across a first TCI state associated with TRP 110a and a second TCI state associated with TRP 110b. In addition, in some aspects, in the case where one or more upper layer parameters (e.g., a prb-BundlingType parameter) are set to "dynamic", the DCI message may include a PRB bundling size indicator field, or otherwise make the PRG and / or PRB bundling size changeable by the DCI message. For example, the PRB bundling size indicator may be a one-bit value that can be used to determine the PRG and / or PRB bundling size P′, which may be equal to one of the values ​​of {2, 4, broadband}. Additionally or alternatively, if upper layer parameters do not cause the PRG and / or PRB bundle size to be changeable by a DCI message, the value of P′ may be semi-statically indicated by RRC configuration (e.g., P′ may have a value fixed to one of {2, 4, wideband}).

[0106] As in Fig. 9A , and further indicated by reference numeral 904, the UE 120 may determine the aggregated RB allocation across multiple TCI states from the FDRA field in the DCI message, and assign the allocated RBs, PRGs, PRB bundles, etc. to the corresponding TCI states based on the PRG and / or PRB bundle size P′. For example, where P′ is semi-statically indicated, the UE 120 may determine the value based on a fixed value indicated in the RRC configuration. In other examples, where the DCI message includes a PRB bundle size indicator field for dynamically indicating and / or changing the PRG and / or PRB bundle size, the UE 120 may determine the value of P′ based on various rules associated with the PRB bundle size indicator field.

[0107] For example, if P′=4 RBs, the RBG size (P) for resource allocation type 0 cannot be 2, because the 4 RBs constituting the channel estimation unit cannot be grouped into a bitmap with only two RBs (i.e., the bitmap will require at least four RBs). The same rule applies to the RB bundling size L used for resource allocation type 1 with interleaving, because when the PRG size is equal to 4 RBs, interleaving cannot be performed using an interleaving unit equal to 2 RBs. However, the exact opposite is true: in the case where the RBG size or RB bundling size is 4, P′ can be 2. Accordingly, one condition may be that the RBG size and / or RB bundling size is greater than the PRG and / or PRB bundling size, while another condition may be that the RBG size and / or RB bundling size is a multiple of the PRG and / or PRB bundling size (e.g., in the case where P′ is 2 or 4). In addition, if P′=wideband, the allocated PRBs should be contiguous to allow wideband channel estimation. This is because the UE 120 assumes that the same precoding is applied to all PDSCH RBs, and thus the allocated PRBs should be contiguous (e.g., because the same precoding cannot be assumed for non-contiguous RBs). In some aspects, the condition where the wideband PRG and / or PRB bundling size is coupled with contiguous RBs applies to an environment where there is only one TCI state across all RBs. For a multi-TRP environment with a wideband PRG and / or PRB bundling size using an FDM scheme, the RBs per TCI state should be contiguous because different precoding is typically used when different TCI states exist.

[0108] Accordingly, in some aspects, UE 120 may use the PRG and / or PRB bundling size to determine how to divide the aggregated RB allocation indicated in the DCI message among multiple RB sets corresponding to different TCI states. Fig. 9A 906, the UE 120 may receive downlink transmissions from multiple TRPs 110a, 110b that may be associated with different TCI states. In this manner, by using the PRG and / or PRB bundling size to partition the aggregate RB allocation indicated in the FDRA field of the DCI message among multiple RB sets corresponding to different TCI states, the UE 120 may correctly handle downlink transmissions associated with different TCI states.

[0109] For example, in the case where UE 120 determines that the PRG and / or PRB bundling size is "wideband", the assignment of the allocated RBs to the corresponding TCI states may depend on whether the allocated PRBs are contiguous. In the case where the allocated PRBs are contiguous, the allocated RBs may be divided into n sets including an equal or substantially equal number of allocated RBs, and each of the n sets may be assigned to a corresponding one of the individual TCI states, where n is the number of individual TCI states. For example, in Fig. 9A In the example, the multi-TRP group includes two TRPs 110a and 110b, so the first half of the allocated RB is assigned to the first TCI state associated with TRP 110a, and the second half of the allocated RB is assigned to the second TCI state associated with TRP 110b, where N RB is the number of allocated RBs indicated in the FDRA field of the DCI message. In such cases, one or more rounding up and / or rounding down operations are used to ensure that the number of RBs in each set is an integer value (e.g., because the allocated RBs do not overlap in the FDM scheme and therefore cannot be assigned with fractional values). For example, in the case where the FDRA field allocates 5 RBs, RBGs, PRGs, RB bundles, etc. among two TCI states, a half-split using rounding up and rounding down operations may result in 3 sets being assigned to one TCI state and 2 sets being assigned to the other TCI state.

[0110] In other examples, where the PRG and / or PRB bundle size is "wideband" and the allocated PRBs are not contiguous but include multiple contiguous portions, each contiguous portion may be assigned to a corresponding TCI. For example, if the allocated PRBs include two contiguous portions, the UE 120 may assign the first contiguous portion to a first TCI state associated with the TRP 110a and the second contiguous portion to a second TCI state associated with the TRP 110b.

[0111] In some aspects, when UE 120 determines that the PRG and / or PRB bundle size is a value other than "wideband" (e.g., 2 or 4), the allocated PRG, PRB bundle, etc. may be determined based on the FDRA field, PRG size, BWP size, location, etc. For example, as in Fig. 9BIn and as indicated by reference numeral 910, a BWP may include n PRGs, PRB bundles, etc., which may be associated with an index (i) from 0≤i≤n-1. As further indicated by reference numeral 910, a UE 120 may determine (e.g., based on the FDRA field) that PRGs and / or PRB bundles associated with indices 1, 2, 4, 5, and 6 are allocated, where each PRG and / or PRB bundle includes two or four RBs depending on the PRG and / or PRB bundle size.

[0112] In some aspects, the UE 120 may determine a scheme to be used to partition the allocated PRGs, PRB bundles, etc. based on a dynamic indicator included in a DCI message, an upper layer RRC configuration, etc. In some aspects, the scheme may include assigning an index to each individual PRG among the allocated PRGs, and mapping the index assigned to each individual PRG to a corresponding one of the individual TCI states according to a function based at least in part on the number of individual TCI states. For example, when there are two individual TCI states, the function may result in the PRG associated with the even index being assigned to the first TCI state associated with the TRP 110a, and the PRG associated with the odd index being assigned to the second TCI state associated with the TRP 110b. More generally, the function may be based on a modulo operator that causes a group of PRGs assigned a particular index to be mapped to a particular TCI state when dividing the particular index by the number of individual TCI states produces a remainder equal to the particular index. For example, when a particular index number mod n is equal to i, the PRG associated with the particular index number may be assigned to TCI state i, where n is the number of individual TCI states.

[0113] In some aspects, the allocated PRGs, PRB bundles, etc. may be indexed relative to the entire bandwidth portion. Fig. 9B 10 and further indicated by reference numeral 912, the PRG indexing covers the entire bandwidth portion, and the PRGs associated with the even indices are assigned to the first TCI state associated with TRP 110a, while the PRGs associated with the odd indices are assigned to the second TCI state associated with TRP 110b. In other examples, as indicated by reference numeral 914, the PRG indexing can be performed only with respect to the allocated RBs (e.g., re-indexing the PRGs starting from 0 within the allocated RBs), and the PRGs associated with the even indices are similarly assigned to the first TCI state, while the PRGs associated with the odd indices are assigned to the second TCI state.

[0114] In some aspects, the scheme used to divide the allocated PRGs, PRB bundles, etc. can be similar to the approach described above in the case where the PRG size is wideband and the allocated PRBs are contiguous, except that the units can be in the form of PRGs and / or PRB bundles instead of RBs. Specifically, the allocated PRGs, PRB bundles, etc. can be divided into n sets including an equal or substantially equal number of allocated PRGs, PRB bundles, and each of the n sets can be assigned to a corresponding one of the individual TCI states, where n is the number of individual TCI states. For example, as in Fig. 9B In and as indicated by reference numeral 916, a first half of the allocated PRG is assigned to a first TCI state and a second half of the allocated PRG is assigned to a second TCI state based on one or more rounding-up and / or rounding-down operations.

[0115] As indicated above, Figures 9A-9B are provided as examples. Other examples may differ from those described in Figures 9A-9B Examples described.

[0116] Figures 10A-10E 1 is a diagram illustrating an example 1000 of multi-TRP communication according to various aspects of the present disclosure, wherein the UE assigns the allocated FDRA indicated in a single DCI message to different TCI states based on the resource allocation type. For example, as mentioned above, the resource allocation type may be RBG-based (Type 0), non-interleaved VRB-to-PRB mapping-based (Type 1 without interleaving), or interleaved VRB-to-PRB mapping-based (Type 1 with interleaving). Accordingly, in some aspects, as indicated by reference numeral 1004, the UE 120 may assign the allocated RBs indicated in the FDRA field to different TCI states based on the resource allocation type.

[0117] For example, Fig. 10BVarious assignment schemes that can be applied when the resource allocation type is RBG-based (type 0) are illustrated. As shown by reference numeral 1010, an example bandwidth portion may include 8 RBGs, and each RBG may have a size P that may be {2, 4, 8, 16} RBs. In the illustrated example, the FDRA field in the DCI message indicates that RBGs 1, 2, 4, 5, and 6 are allocated, and various approaches may be used to assign the allocated RBGs to different TCI states. For example, as shown by reference numeral 1012, the allocated RBGs may be indexed (e.g., within the bandwidth portion or only within the allocated RBGs), and each index may be mapped to a corresponding TCI state according to a function based at least in part on the number of individual TCI states. For example, in the presence of two TCI states, the function may result in a mapping in which RBGs with even indices are assigned to a first TCI state and RBGs with odd indices are assigned to a second TCI state.

[0118] Additionally or alternatively, the allocated RBGs may be divided into a plurality of sets including an equal or substantially equal number of RBGs, and each set may be assigned to a corresponding TCI state. For example, as shown by reference numeral 1014, when there are two TCI states, the allocated RBGs may be divided into two sets, wherein the first half of the allocated RBGs are assigned to the first TCI state, and the second half of the allocated RBGs are assigned to the second TCI state. In this case, when the allocated RBGs are divided into a plurality of sets, rounding up and rounding down operations are used in a manner similar to that described elsewhere herein. Additionally or alternatively, in the case where the PRG size is determined to be wideband and the allocated RBGs are discontinuous but include a number of continuous portions equal to the number of TCI states, each continuous portion may be assigned to a corresponding TCI state. For example, the allocated RBGs shown by reference numeral 1010 include a first continuous portion (RBG 1-2) and a second continuous portion (RBG 4-6) that are discontinuous with each other (i.e., the aggregated RBG allocation is not continuous). Accordingly, as indicated by reference numeral 1016, the first continuous portion may be assigned to a first TCI state, and the second continuous portion may be assigned to a second TCI state.

[0119] In some aspects, when the resource allocation type is RBG-based (Type 0), the specific assignment scheme to be applied can be determined based on upper layer RRC configuration, dynamically indicated in a DCI message, and / or based on a function of the PRG size. For example, in some aspects, UE 120 can divide the allocated RBGs into multiple sets including an equal or substantially equal number of RBGs when the PRG size is wideband, and use an indexing scheme in other ways when the PRG size is a value other than wideband (e.g., 2 or 4).

[0120] In other examples, Fig. 10C Various assignment schemes that may be applied when the resource allocation type is based on non-interleaved VRB to PRB mapping and the parameter L regarding the RB bundling size is not configured are illustrated. In such non-interleaved scenarios, as mentioned elsewhere herein, the VRB allocation is the same as the PRB allocation, and both are contiguous. For example, as indicated by reference numeral 1020, the bandwidth portion includes 8 RBs, and the allocated VRBs and / or PRBs are contiguous, spanning RBs 1-5. With respect to mapping to TCI states, different approaches may be used based on the PRG size, which may result in similarity to the above reference to FIG. Figures 9A-9B For example, reference numeral 1022 illustrates a case where the PRG size is wideband, which results in a split into two halves according to RB units, wherein the first half is assigned to a first TCI state and the second half is assigned to a second TCI state. As mentioned elsewhere herein, one or more rounding up and / or rounding down operations may be used to split or otherwise divide the allocated RBs into sets of equal or similar numbers of RBs.

[0121] In other examples, where the PRG size is a value other than "wideband" (e.g., 2 or 4), an indexing scheme may be used, and the indexing scheme may take into account PRG alignment to assign RBs to a first TCI state and a second TCI state. For example, as shown by reference numeral 1024, a PRG may include 2 RBs, whereby the first two RBs in the bandwidth portion may be assigned index 0, the next two RBs in the bandwidth portion may be assigned index 1, and so on. As mentioned elsewhere herein, the index may be assigned relative to the entire bandwidth portion or only to the allocated RBs. In the illustrated example, where there are two TCI states, the scheme may result in the assignment shown by reference numeral 1024, where RBs mapped to PRGs with even indices are assigned to the first TCI state, and RBs mapped to PRGs with odd indices are assigned to the second TCI state. Additionally or alternatively, as indicated by reference numeral 1026, the allocated RBs may be grouped into multiple sets based on the PRG size (e.g., each set including two RBs based on a PRG size of 2), and the first half of the RBs are assigned to a first TCI state and the second half of the RBs are assigned to a second TCI state.

[0122] In other examples, Figures 10D-10EVarious assignment schemes applicable when the resource allocation type is based on interleaved VRB to PRB mapping or non-interleaved VRB to PRB mapping are explained, in which case the RB cluster size parameter L is configured and used for the purpose of assigning the allocated RBs to the corresponding individual TCI states. For example, in some aspects, the RB cluster size L may be determined according to parameters provided in the RRC configuration (e.g., vrb to PRB interleaver parameters). Accordingly, in some aspects, in the case where the determination of the even / odd index is performed based on the RB cluster index within the bandwidth part or only within the allocated RBs, the even RB cluster may be assigned to the first TCI state and the odd RB cluster may be assigned to the second TCI state, or half of the allocated RB cluster may be assigned to the first TCI state and the other half to the second TCI state. As mentioned elsewhere herein, these examples are described in the context of a multi-TRP group including two TRPs (associated with two TCI states), and in some aspects, the assignment scheme can be generalized to the case where there are n TCI states (e.g., partitioning the allocated RB bundles into n sets with equal or substantially equal numbers of RB bundles, performing indexing based on a modulo operator or other function, etc.). Furthermore, the specific assignment scheme to be applied can be determined based on upper layer RRC configuration, dynamically indicated in a DCI message, and / or based on the PRG size.

[0123] In some aspects, various assignment schemes for mapping RB bundles to corresponding TCI states may be performed in the VRB domain (e.g., using VRB indices) or the PRB domain (e.g., using PRB indices). Fig. 10D , reference numeral 1030 illustrates the allocated RB bundles determined in the VRB domain from the FDRA field in the DCI message, reference numeral 1032 illustrates a mapping in which RB bundles with even indices are assigned to a first TCI state and RB bundles with odd indices are assigned to a second TCI state, and reference numeral 1034 illustrates a mapping in which the first half of the allocated RB bundles are assigned to the first TCI state and the second half of the allocated RB bundles are assigned to the second TCI state. As shown in Fig. 10D , and further indicated by reference numeral 1036, the assignments to the allocated RB bundles may then be converted to the PRB domain based on an applicable interleaving function.

[0124] Additionally or alternatively, RB bundles may be mapped directly to individual TCI states in the PRB domain. Fig. 10D, reference numeral 1040 illustrates the allocated RB bundles in the PRB domain (e.g., as determined from the FDRA field), reference numeral 1042 illustrates a mapping in which RB bundles with even indices are assigned to a first TCI state and RB bundles with odd indices are assigned to a second TCI state, and reference numeral 1044 illustrates a mapping in which the first half of the allocated RB bundles are assigned to the first TCI state and the second half of the allocated RB bundles are assigned to the second TCI state.

[0125] As indicated above, Figures 10A-10E are provided as examples. Other examples may differ from the reference Figures 10A-10E The content described.

[0126] Fig.11 1 is a diagram illustrating an example process 1100 performed, for example, by a UE according to various aspects of the present disclosure. Example process 1100 is an example in which a UE (e.g., UE 120, etc.) assigns an FDRA indicated in a single DCI message to multiple TCI states based on a PRG size, a PRB bundling size, and / or another consecutive RB unit on which the same precoding is used (e.g., to achieve joint channel estimation).

[0127] As in Fig.11 As shown in , in some aspects, process 1100 may include receiving a DCI message including a FDRA field indicating allocated RBs across multiple TCI states (block 1110). For example, a UE (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, memory 282, etc.) may receive a DCI message including a FDRA field indicating allocated RBs across multiple TCI states, as described above.

[0128] As in Fig.11 As further shown in FIG. 1 , in some aspects, process 1100 may include identifying, based at least in part on the DCI message or the RRC configuration, at least one parameter indicating consecutive RB units on which the same precoding is used (block 1120). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may identify, based at least in part on the DCI message or the RRC configuration, at least one parameter indicating consecutive RB units on which the same precoding is used, as described above.

[0129] As in Fig.11As further shown in FIG. 1 , in some aspects, process 1100 may include assigning the allocated RBs to individual TCI states in the plurality of TCI states based at least in part on at least one parameter indicating consecutive RB units on which the same precoding is used (block 1130). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may assign the allocated RBs to individual TCI states in the plurality of TCI states based at least in part on at least one parameter indicating consecutive RB units on which the same precoding is used, as described above.

[0130] Process 1100 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0131] In a first aspect, the at least one parameter comprises one or more of a PRG size or a PRB bundling size.

[0132] In a second aspect, alone or in combination with the first aspect, assigning the allocated RBs to individual TCI states includes: dividing the allocated RBs into n sets including an equal or substantially equal number of allocated RBs based at least in part on determining that the allocated RBs are contiguous and that contiguous RB units on which the same precoding is used are wideband, where n is the number of individual TCI states; and assigning each of the n sets to a corresponding one of the individual TCI states.

[0133] In a third aspect, either alone or in combination with one or more of the first and second aspects, an equal or substantially equal number of allocated RBs to be included in the n sets is determined based at least in part on the total number of allocated RBs and the number of individual TCI states, using one or more rounding-up operations and one or more rounding-down operations.

[0134] In a fourth aspect, alone or in combination with one or more of the first to third aspects, for an FDM scheme with multiple TCI states, consecutive RB units with the same precoding are wideband per TCI state.

[0135] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the allocated RBs are contiguous within the n sets.

[0136] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, assigning the allocated RBs to individual TCI states includes: determining that the allocated RBs are discontinuous but include n contiguous parts and that contiguous RB units on which the same precoding is used are wideband, where n is the number of individual TCI states; and assigning each of the n contiguous parts to a corresponding one of the individual TCI states.

[0137] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, based at least in part on determining that consecutive RB units on which the same precoding is used are values ​​other than wideband, the allocated RBs include allocated PRGs assigned to individual TCI states according to a scheme determined at least in part based on one or more of a dynamic indicator or an RRC configuration included in a DCI message.

[0138] In an eighth aspect, either alone or in combination with one or more of the first to seventh aspects, an index is assigned to each individual PRG in the allocated PRGs based at least in part on an indication in a FDRA field, wherein the index assigned to each individual PRG is mapped to a corresponding one of the individual TCI states according to a function based at least in part on the number of individual TCI states.

[0139] In a ninth aspect, either alone or in combination with one or more of aspects one to eight, when the number of individual TCI states is two, the function maps a first group of PRGs assigned even indices to a first TCI state, and maps a second group of PRGs assigned odd indices to a second TCI state.

[0140] In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the function is a modulo operator that maps a set of PRGs assigned a particular index to a particular TCI state when dividing the particular index by the number of individual TCI states produces a remainder equal to the particular index.

[0141] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, an index assigned to each PRG is determined relative to the entire bandwidth portion.

[0142] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, an index assigned to each PRG is determined only with respect to the allocated RBs indicated in the FDRA field.

[0143] In a thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, the scheme comprises dividing the allocated PRGs into n sets comprising an equal or substantially equal number of allocated PRGs, where n is the number of individual TCI states; and assigning each of the n sets to a corresponding one of the individual TCI states.

[0144] In the fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, an equal or substantially equal number of allocated RBs to be included in the n sets is determined based at least in part on the total number of allocated RBs and the number of individual TCI states, using one or more rounding-up operations and one or more rounding-down operations.

[0145] although Fig.11 An example block diagram of process 1100 is shown, but in some aspects, process 1100 may include Fig.11 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 1100. Additionally or alternatively, two or more blocks of the process 1100 may be executed in parallel.

[0146] Fig.12 1 is a diagram illustrating an example process 1200 performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process 1200 is an example in which a UE (e.g., UE 120) allocates FDRAs indicated in a single DCI message to multiple TCI states based on resource allocation type (e.g., depending on whether the resource allocation is RBG-based, VRB-based with no interleaving, VRB-based with interleaving, etc.).

[0147] As in Fig.12 As shown in , in some aspects, process 1200 may include receiving a DCI message including a FDRA field indicating allocated RBs across multiple TCI states (block 1210). For example, a UE (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, memory 282, etc.) may receive a DCI message including a FDRA field indicating allocated RBs across multiple TCI states, as described above.

[0148] As in Fig.12As further shown in FIG. 1 , in some aspects, process 1200 may include identifying at least one parameter indicating a resource allocation type based at least in part on one or more of the DCI message or the RRC configuration (block 1220). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may identify at least one parameter indicating a resource allocation type based at least in part on one or more of the DCI message or the RRC configuration, as described above.

[0149] As in Fig.12 As further shown in FIG. 1 , in some aspects, process 1200 may include assigning the allocated RBs to individual TCI states among the multiple TCI states based at least in part on the resource allocation type (block 1230). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may assign the allocated RBs to individual TCI states among the multiple TCI states based at least in part on the resource allocation type, as described above.

[0150] Process 1200 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0151] In a first aspect, assigning the allocated RBs to individual TCI states includes assigning an index to each individual RBG allocated in the FDRA field based at least in part on determining that the resource allocation type is RBG-based, and the index assigned to each individual RBG is mapped to a corresponding one of the individual TCI states according to a function based at least in part on the number of individual TCI states.

[0152] In a second aspect, alone or in combination with the first aspect, when the number of individual TCI states is 2, the function maps a first group of RBGs assigned even indexes to a first TCI state and maps a second group of RBGs assigned odd indexes to a second TCI state.

[0153] In a third aspect, either alone or in combination with one or more of the first and second aspects, the function is a modulo operator that maps a set of RBGs assigned a particular index to a particular TCI state when dividing the particular index by the number of individual TCI states produces a remainder equal to the particular index.

[0154] In a fourth aspect, either alone or in combination with one or more of the first to third aspects, the index assigned to each individual RBG is determined relative to one or more RBGs in the entire bandwidth portion or a set of RBGs allocated only in the FDRA field.

[0155] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, assigning the allocated RBs to individual TCI states includes: dividing the allocated RBs into n sets including an equal or substantially equal number of allocated RBGs based at least in part on determining that the resource allocation type is RBG-based and that consecutive RB units using the same precoding thereon are values ​​other than wideband, where n is the number of individual TCI states; and assigning each of the n sets to a corresponding one of the individual TCI states.

[0156] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, an equal or substantially equal number of allocated RBGs to be included in the n sets is determined based at least in part on the total number of allocated RBGs and the number of individual TCI states, using one or more rounding-up operations and one or more rounding-down operations.

[0157] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, assigning the allocated RBs to individual TCI states comprises: determining that an FDRA field indicates that the allocated RBGs are discontinuous but include n contiguous portions and that contiguous RB units on which the same precoding is used are wideband, where n is the number of individual TCI states; and allocating each of the n contiguous portions to a corresponding one of the individual TCI states based at least in part on determining that the resource allocation type is RBG-based.

[0158] In an eighth aspect, either alone or in combination with one or more of the first to seventh aspects, based at least in part on determining that the resource allocation type is RBG-based, the allocated RBGs indicated in the FDRA field are assigned to individual TCI states according to a scheme determined at least in part based on one or more of: a dynamic indicator included in a DCI message, an RRC configuration, or consecutive RB units on which the same precoding is used.

[0159] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, assigning the allocated RBs to individual TCI states comprises: dividing the allocated RBs into n sets including an equal or substantially equal number of allocated RBs based at least in part on determining that the resource allocation type is based on a non-interleaved mapping from a VRB domain to a PRB domain and that consecutive RB units using the same precoding thereon are wideband, where n is the number of individual TCI states; and assigning each of the n sets to a corresponding one of the individual TCI states.

[0160] In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, assigning the allocated RBs to individual TCI states includes: assigning an index to each individual RB among the allocated RBs indicated in the FDRA field based at least in part on determining a resource allocation type based on a non-interleaved mapping from a VRB domain to a PRB domain without configured parameters for an RB bundle size and a value other than wideband on which a unit of consecutive RBs using the same precoding is used, and the index assigned to each individual RB is mapped to a corresponding one of the individual TCI states according to a function based at least in part on the number of individual TCI states.

[0161] In an eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, the index assigned to each individual RBG is determined relative to one or more available RBs in the entire bandwidth portion or only the allocated RBs indicated in the FDRA field.

[0162] In a twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, the allocated RBs are assigned to individual TCI states based on the RB bundle size, at least in part based on determining the resource allocation type based on a mapping from the VRB domain to the PRB domain and having configured parameters for the RB bundle size.

[0163] In the thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, assigning the allocated RBs to individual TCI states comprises assigning an index to each individual RB bundle in the allocated RB bundle indicated in the FDRA field based at least in part on the RB bundle size, and the index assigned to each individual RB bundle is mapped to a corresponding one of the individual TCI states according to a function based at least in part on the number of individual TCI states.

[0164] In a fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, the index assigned to each individual RB bundle is determined relative to one or more available RB bundles in the entire bandwidth portion or the allocated RB bundle indicated only in the FDRA field.

[0165] In the fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, when the number of individual TCI states is 2, the function maps a first group of RB bundles assigned even indexes to a first TCI state, and maps a second group of RB bundles assigned odd indexes to a second TCI state.

[0166] In the sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, the function is a modulo operator that maps a set of RB bundles assigned a particular index to a particular TCI state when dividing the particular index by the number of individual TCI states produces a remainder equal to the particular index.

[0167] In the seventeenth aspect, either alone or in combination with one or more of the first to sixteenth aspects, assigning the allocated RBs to individual TCI states comprises dividing the allocated RB bundles into n sets comprising an equal or substantially equal number of allocated RB bundles based at least in part on the RB bundle size, and assigning each of the n sets to a corresponding one of the individual TCI states.

[0168] In an eighteenth aspect, alone or in combination with one or more of the first to seventeenth aspects, an RB bundling size is indicated in an RRC configuration.

[0169] In a nineteenth aspect, alone or in combination with one or more of the first to eighteenth aspects, the allocated RBs include RB bundles assigned to individual TCI states in one or more of the VRB domain or the PRB domain.

[0170] although Fig.12 An example block diagram of process 1200 is shown, but in some aspects, process 1200 may include Fig.12 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 1200. Additionally or alternatively, two or more blocks of the process 1200 may be executed in parallel.

[0171] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired by practice of the various aspects.

[0172] As used herein, the term "component" is intended to be broadly interpreted as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented with hardware, firmware, and / or a combination of hardware and software.

[0173] As used herein, satisfying a threshold may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0174] It will be apparent that the systems and / or methods described herein can be implemented in different forms of hardware, firmware, and / or a combination of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit the various aspects. Thus, the operation and behavior of these systems and / or methods are described herein without reference to specific software codes-it is understood that software and hardware can be designed to implement these systems and / or methods based at least in part on the description herein.

[0175] Although specific feature combinations are described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner that is not specifically described in the claims and / or not disclosed in the specification. Although each of the dependent claims listed below can be directly subordinate to only one claim, the disclosure of various aspects includes that each dependent claim is combined with each other claim in this group of claims. The phrase "at least one" quoted in a column of items refers to any combination of these items, including single members. As an example, "at least one of a, b or c" is intended to cover: a, b, c, ab, ac, bc, and abc. As an example, "at least one of a, b or c" is intended to cover: a, b, c, ab, ac, bc, and abc, and any combination with multiple identical elements (for example, aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other sorting of a, b and c).

[0176] Elements, actions or instructions used herein should not be interpreted as critical or necessary unless explicitly described as such. Moreover, as used herein, the articles "one" and "a" are intended to include one or more items and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, non-related items, combinations of related and non-related items, etc.), and can be used interchangeably with "one or more". In the case of intending to have only one item, the phrase "only one" or similar language is used. Moreover, as used herein, the terms "having", "containing", "including", etc. are intended to be open terms. In addition, the phrase "based on" is intended to mean "based at least in part on", unless otherwise explicitly stated.

Claims

1. A wireless communication method performed by a user equipment (UE), comprising: receiving a downlink control information (DCI) message including a frequency domain resource allocation (FDRA) field indicating allocated resource blocks (RBs) across a plurality of transmission configuration indication (TCI) states; identifying, based at least in part on one or more of the DCI message or a radio resource control (RRC) configuration, at least one parameter indicating consecutive RB units on which the same precoding is used, wherein the at least one parameter comprises one or more of a precoding RB group (PRG) size or a physical RB (PRB) bundling size; and The allocated RBs are assigned to individual TCI states among the plurality of TCI states based at least in part on the at least one parameter indicating the consecutive RB units on which the same precoding is used.

2. The method of claim 1, wherein assigning the allocated RB to the individual TCI state comprises: partitioning the allocated RBs into n sets including an equal or substantially equal number of allocated RBs based at least in part on determining that the allocated RBs are contiguous and the contiguous RB units on which the same precoding is used are wideband, wherein n is the number of the individual TCI states; and Each of the n sets is assigned to a corresponding one of the individual TCI states.

3. A method as claimed in claim 2, wherein an equal or substantially equal number of allocated RBs to be included in the n sets is determined at least in part based on the total number of allocated RBs and the number of individual TCI states, using one or more rounding-up operations and one or more rounding-down operations.

4. The method of claim 2, wherein for a frequency division multiplexing (FDM) scheme having the plurality of TCI states, the consecutive RB units having the same precoding are wideband per TCI state. The method of claim 2 , wherein the allocated RBs are continuous within the n sets.

6. The method of claim 1, wherein assigning the allocated RB to the individual TCI state comprises: Determining that the allocated RBs are not contiguous but include n contiguous parts and the contiguous RB units using the same precoding thereon are wideband, wherein n is the number of the individual TCI states; as well as Each of the n continuous portions is assigned to a corresponding one of the individual TCI states.

7. The method of claim 1 , wherein based at least in part on determining that the consecutive RB units on which the same precoding is used are values ​​other than wideband, the allocated RBs include allocated PRGs assigned to the individual TCI states according to a scheme determined based at least in part on one or more of a dynamic indicator included in the DCI message or the RRC configuration.

8. The method of claim 7, wherein the scheme comprises: An index is assigned to each individual PRG in the allocated PRGs based at least in part on an indication in the FDRA field, wherein the index assigned to each individual PRG is mapped to a corresponding one of the individual TCI states according to a function based at least in part on the number of the individual TCI states.

9. The method of claim 8, wherein: When the number of the individual TCI states is 2, the function causes a first group of PRGs assigned even indexes to be mapped to a first TCI state, and causes a second group of PRGs assigned odd indexes to be mapped to a second TCI state.

10. The method of claim 8, wherein the function is a modulo operator that causes a set of PRGs assigned a particular index to be mapped to a particular TCI state when dividing the particular index by the number of individual TCI states produces a remainder equal to the particular index.

11. The method of claim 8, wherein the index assigned to each PRG is determined relative to an entire bandwidth portion.

12. The method of claim 8, wherein the index assigned to each PRG is determined only with respect to the allocated RB indicated in the FDRA field.

13. The method of claim 7, wherein the scheme comprises: partitioning the allocated PRGs into n sets including an equal or substantially equal number of allocated PRGs, where n is the number of the individual TCI states; as well as Each of the n sets is assigned to a corresponding one of the individual TCI states.

14. A method as claimed in claim 13, wherein the equal or substantially equal number of allocated RBs to be included in the n sets is determined at least in part based on the total number of allocated RBs and the number of individual TCI states, using one or more rounding-up operations and one or more rounding-down operations.

15. A user equipment for wireless communication, comprising: Memory; as well as one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: receiving a downlink control information (DCI) message including a frequency domain resource allocation field indicating allocated resource blocks (RBs) across a plurality of transmission configuration indication (TCI) states; identifying, based at least in part on one or more of the DCI message or a radio resource control configuration, at least one parameter indicating consecutive RB units on which the same precoding is used, wherein the at least one parameter comprises one or more of a precoding RB group (PRG) size or a physical RB (PRB) bundling size; and The allocated RBs are assigned to individual TCI states of the plurality of TCI states based at least in part on the at least one parameter indicating the consecutive RB units on which the same precoding is used.

16. The UE of claim 15, wherein the memory and the one or more processors are further configured to: partitioning the allocated RBs into n sets including an equal or substantially equal number of allocated RBs based at least in part on determining that the allocated RBs are contiguous and the contiguous RB units on which the same precoding is used are wideband, wherein n is the number of the individual TCI states; and Each of the n sets is assigned to a corresponding one of the individual TCI states.

17. The UE of claim 16, wherein an equal or substantially equal number of allocated RBs to be included in the n sets is determined based at least in part on a total number of allocated RBs and a number of the individual TCI states, using one or more rounding-up operations and one or more rounding-down operations.

18. The UE of claim 16, wherein for a frequency division multiplexing (FDM) scheme having the plurality of TCI states, the consecutive RB units having the same precoding are wideband per TCI state. The UE of claim 16 , wherein the allocated RBs are continuous within the n sets.

20. The UE of claim 15, wherein the memory and the one or more processors are further configured to, when assigning the allocated RB to the individual TCI state: determining that the allocated RBs are not contiguous but include n contiguous portions and the contiguous RB units using the same precoding thereon are wideband, wherein n is the number of the individual TCI states; and Each of the n continuous portions is assigned to a corresponding one of the individual TCI states.

21. The UE of claim 15, wherein based at least in part on determining that the consecutive RB units on which the same precoding is used are values ​​other than wideband, the allocated RBs include allocated PRGs assigned to the individual TCI states according to a scheme determined at least in part based on one or more of a dynamic indicator included in the DCI message or the RRC configuration.

22. The UE of claim 21, wherein the scheme comprises: An index is assigned to each individual PRG in the allocated PRGs based at least in part on an indication in the FDRA field, wherein the index assigned to each individual PRG is mapped to a corresponding one of the individual TCI states according to a function based at least in part on the number of the individual TCI states.

23. The UE of claim 22, wherein when the number of the individual TCI states is 2, the function causes a first group of PRGs assigned even indexes to be mapped to a first TCI state, and causes a second group of PRGs assigned odd indexes to be mapped to a second TCI state.

24. The UE of claim 22, wherein the function is a modulo operator that maps a set of PRGs assigned a specific index to a specific TCI state when dividing the specific index by the number of individual TCI states produces a remainder equal to the specific index.

25. The UE of claim 22, wherein the index assigned to each PRG is determined relative to an entire bandwidth portion.

26. The UE of claim 22, wherein the index assigned to each PRG is determined only with respect to the allocated RB indicated in the FDRA field.

27. The UE of claim 21, wherein the scheme comprises: partitioning the allocated PRGs into n sets including an equal or substantially equal number of allocated PRGs, where n is the number of the individual TCI states; as well as Each of the n sets is assigned to a corresponding one of the individual TCI states.

28. The UE of claim 27, wherein an equal or substantially equal number of allocated RBs to be included in the n sets is determined based at least in part on a total number of allocated RBs and a number of the individual TCI states, using one or more rounding-up operations and one or more rounding-down operations.

29. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising: One or more instructions that, when executed by one or more processors of user equipment, cause the one or more processors to: receiving a downlink control information (DCI) message including a frequency domain resource allocation field indicating allocated resource blocks (RBs) across a plurality of transmission configuration indication (TCI) states; identifying, based at least in part on one or more of the DCI message or a radio resource control configuration, at least one parameter indicating consecutive RB units on which the same precoding is used, wherein the at least one parameter comprises one or more of a precoding RB group (PRG) size or a physical RB (PRB) bundling size; and The allocated RBs are assigned to individual TCI states among the plurality of TCI states based at least in part on the at least one parameter indicating the consecutive RB units on which the same precoding is used.

30. A device for wireless communication, comprising: means for receiving a downlink control information (DCI) message including a frequency domain resource allocation field indicating allocated resource blocks (RBs) across a plurality of transmission configuration indication (TCI) states; means for identifying at least one parameter indicating consecutive RB units on which the same precoding is used based at least in part on one or more of the DCI message or a radio resource control configuration, wherein the at least one parameter comprises one or more of a precoding RB group (PRG) size or a physical RB (PRB) bundling size; and Means for assigning the allocated RBs to individual TCI states among the plurality of TCI states based at least in part on the at least one parameter indicating the consecutive RB units on which the same precoding is used.

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