Quasi co-location configuration

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment may receive configuration information indicating, for a plurality of signals configured in a symbol, a plurality of quasi-co-location (QCL) relationships to be used to determine channel attributes; selecting, from the plurality of QCL relationships, a QCL relationship to be used to determine the channel attribute and the plurality of signals in the symbol; and receiving the plurality of signals according to the selected QCL relationship based at least in part on the channel attribute. Numerous other aspects are provided.

Description

[0001] This application is a divisional application of a patent application with an international application date of December 10, 2020, an international application number of PCT / CN2020 / 135114, a Chinese national application date of December 10, 2020, an application number of 202080085667.X, and an invention name of “Quasi-co-located configuration”.

[0002] CROSS-REFERENCE TO RELATED APPLICATIONS

[0003] This patent application claims priority to PCT patent application No. PCT / CN2019 / 124470, entitled “QUASI-COLOCATION CONFIGURATION”, filed on December 11, 2019 and assigned to the assignee of this application. The disclosure of the prior application is considered part of this patent application and is incorporated into this patent application by reference.

[0004] Public domain

[0005] Aspects of the present disclosure relate generally to wireless communications, and to techniques and apparatus for quasi-colocated (QCL) configurations. 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. Overview

[0011] In some aspects, a wireless communication method performed by a user equipment (UE) may include: receiving configuration information indicating multiple quasi-co-located (QCL) relationships to be used to determine channel properties for multiple signals configured in a codeword; selecting a QCL relationship to be used to determine the channel property and the multiple signals in the codeword from the multiple QCL relationships; and receiving the multiple signals according to the selected QCL relationship based at least in part on the channel property.

[0012] In some aspects, a wireless communication method performed by a base station may include: selecting a QCL relationship to be used to determine channel properties for multiple signals in a codeword from a plurality of QCL relationships, wherein the plurality of QCL relationships are associated with the channel properties and are configured for the multiple signals in the codeword; and transmitting the multiple signals to a UE according to the selected QCL relationship based at least in part on the channel properties.

[0013] In some aspects, a UE for wireless communication may include a memory and one or more processors coupled to the memory. For example, the one or more processors may be coupled to the memory operatively, electronically, communicatively, or otherwise. The memory may include instructions executable by the one or more processors to cause the UE to perform the following operations: receive configuration information indicating multiple QCL relationships to be used for determining channel properties for multiple signals configured in a codeword; select a QCL relationship to be used to determine the channel property and the multiple signals in the codeword from the multiple QCL relationships; and receive the multiple signals according to the selected QCL relationship based at least in part on the channel property.

[0014] In some aspects, a base station for wireless communication may include a memory and one or more processors coupled to the memory. For example, the one or more processors may be coupled to the memory operatively, electronically, communicatively, or otherwise. The memory may include instructions executable by the one or more processors to cause the base station to: select a QCL relationship to be used to determine a channel property for multiple signals in a symbol from a plurality of QCL relationships, wherein the plurality of QCL relationships are associated with the channel property and configured for the multiple signals in the symbol; and transmit the multiple signals to a UE according to the selected QCL relationship based at least in part on the channel property.

[0015] 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 UE to: receive configuration information indicating multiple QCL relationships to be used for determining channel properties for multiple signals configured in a symbol; select a QCL relationship to be used for determining the channel property and the multiple signals in the symbol from the multiple QCL relationships; and receive the multiple signals according to the selected QCL relationship based at least in part on the channel property.

[0016] 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 base station, may cause the base station to: select a QCL relationship to be used to determine a channel property for a plurality of signals in a symbol from a plurality of QCL relationships, wherein the plurality of QCL relationships are associated with the channel property and configured for the plurality of signals in the symbol; and transmit the plurality of signals to a UE according to the selected QCL relationship based at least in part on the channel property.

[0017] In some aspects, an apparatus for wireless communication may include: a device for receiving configuration information indicating multiple QCL relationships to be used to determine channel properties for multiple signals configured in a codeword; a device for selecting a QCL relationship to be used to determine the channel property and the multiple signals in the codeword from the multiple QCL relationships; and a device for receiving the multiple signals according to the selected QCL relationship based at least in part on the channel property.

[0018] In some aspects, an apparatus for wireless communication may include: a device for selecting a QCL relationship to be used to determine a channel property for multiple signals in a codeword from a plurality of QCL relationships, wherein the plurality of QCL relationships are associated with the channel property and are configured for the multiple signals in the codeword; and a device for transmitting the multiple signals to a UE according to the selected QCL relationship based at least in part on the channel property.

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

[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 and a UE in communication in a wireless communication network according to various aspects of the present disclosure.

[0025] Figure 3 is a diagram illustrating an example of signaling for configuring and selecting QCL relationships of symbols according to various aspects of the present disclosure.

[0026] Figure 4-7 is a diagram illustrating an example of a selected QCL relationship for a reference signal in a symbol.

[0027] Figure 8 is a diagram illustrating example processes performed, for example, by a UE according to various aspects of the present disclosure.

[0028] Fig. 9 is a diagram illustrating example processes performed, for example, by a base station in accordance with various aspects of the present disclosure. Detailed Description

[0030] 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.

[0031] 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.

[0032] It should be noted that while various aspects may be described herein using terminology generally associated with 5G or NR radio access technologies (RATs), various aspects of the present disclosure may be applied to other RATs, such as 3G RATs, 4G RATs, and / or RATs after 5G (e.g., 6G).

[0033] Figure 11 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), etc. 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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).

[0038] 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 via a wireless or wired backhaul.

[0039] 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.

[0040] 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). Some UEs may be considered as low power UEs, low complexity UEs, low cost UEs, etc. UE 120 may be included inside a housing that houses components of UE 120, such as processor components, memory components, etc.

[0041] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific radio access technology (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.

[0042] 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.

[0043] The devices of the wireless network 100 can communicate using an electromagnetic spectrum, which can be subdivided into various categories, frequency bands, channels, etc. based on frequency or wavelength. For example, the devices of the wireless network 100 can communicate using an operating band having a first frequency range (FR1) and / or can communicate using an operating band having a second frequency range (FR2), the first frequency range (FR1) can span from 410 MHz to 7.125 GHz, and the second frequency range (FR2) can span from 24.25 GHz to 52.6 GHz. Frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to as a "sub-6 GHz" band. Similarly, FR2 is often referred to as a "millimeter wave" band, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as a "millimeter wave" band by the International Telecommunication Union (ITU). Therefore, unless otherwise specifically stated, it should be understood that the terms "sub-6 GHz" and the like, if used herein, may broadly refer to frequencies less than 6 GHz, frequencies within FR1, and / or mid-band frequencies (e.g., greater than 7.125 GHz). Similarly, unless otherwise specifically stated, it should be understood that the terms "millimeter wave" and the like, if used herein, may broadly refer to frequencies within the EHF band, frequencies within FR2, and / or mid-band frequencies (e.g., less than 24.25 GHz). It is contemplated that the frequencies included in FR1 and FR2 may be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0044] As indicated above, Figure 1 are provided as examples. Other examples may differ from those described in Figure 1 Examples described.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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 a quasi-co-located (QCL) configuration, 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. Figure 8 The process of 800 Fig. 9 900, and / or operations of other processes as described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or 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 base station 110 and / or UE 120, may perform or direct, for example, Figure 8 The process of 800 Fig. 9 The scheduler 246 may schedule UEs for data transmission on the downlink and / or uplink.

[0050] In some aspects, UE 120 may include: means for receiving configuration information indicating multiple QCL relationships to be used for determining channel properties for multiple signals configured in a symbol; means for selecting from the multiple QCL relationships a QCL relationship to be used for determining the channel properties and the multiple signals in the symbol; means for receiving the multiple signals according to the selected QCL relationship based at least in part on the channel properties; means for transmitting capability information indicating that a common QCL relationship can be supported for the multiple signals in a single symbol, a common QCL relationship can be supported for the multiple signals at a granularity of a resource block or a set of resource blocks, or two or more QCL relationships can be supported for the multiple signals in a single symbol; means for transmitting information indicating a preferred rule for selecting a QCL relationship; and the like. In some aspects, such means may include in conjunction with Figure 2 One or more components of the UE 120 are depicted, such as the 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.

[0051] In some aspects, the base station 110 may include: a device for selecting a QCL relationship to be used to determine a channel property of multiple signals in a codeword from a plurality of QCL relationships, wherein the plurality of QCL relationships are associated with the channel property and configured for the multiple signals in the codeword; a device for transmitting the multiple signals to the UE according to the selected QCL relationship based at least in part on the channel property; a device for receiving capability information from the UE, the capability information indicating that a common QCL relationship can be supported for the multiple signals in a single codeword, a common QCL relationship can be supported for the multiple signals at a granularity of a resource block or a set of resource blocks, or two or more QCL relationships can be supported for the multiple signals in a single codeword; a device for receiving information indicating a preferred rule for selecting a QCL relationship; and the like. In some aspects, such a device may include a device in combination with Figure 2 One or more components of base station 110 are depicted, such as antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and the like.

[0052] As indicated above, Figure 2 are provided as examples. Other examples may differ from those described in Figure 2 Examples described.

[0053] Quasi co-location is a concept for transmitting information related to a signal to be communicated wirelessly. If the channel properties on the port of the first signal can be inferred from the channel properties on the port of the second signal, the first signal and the second signal are referred to as quasi co-location (QCL). For example, the first signal may be referred to as quasi co-location with the second signal. Channel properties may include Doppler shift, Doppler spread, average delay, delay spread, spatial reception parameters, or another property. A QCL relationship may define how two signals are quasi co-located. QCL relationships may be configured and indicated for various signals, such as a demodulation reference signal (DMRS) of a physical downlink control channel (PDCCH), a demodulation reference signal (DMRS) of a physical downlink shared channel (PDSCH), or a channel state information (CSI) reference signal (RS) (CSI-RS).

[0054] The QCL relationship may be configured for the RS by a higher layer (such as a network entity, BS, etc.). The QCL relationship may indicate a QCL source RS and a QCL type. The QCL source RS may be an RS from which a channel property is to be derived. For example, if a channel property of a first signal with respect to Doppler spread is a QCL source RS of a second signal, the Doppler spread of the second RS may be determined to be equal to or assumed to be equal to the Doppler spread of the first RS. The QCL type may identify a set of channel properties for which a QCL relationship is defined between two or more signals. For example, in NR, four QCL types may be defined:

[0055] i. 'QCL-Type A': {Doppler shift, Doppler spread, average delay, delay spread}

[0056] ii. 'QCL-Type B': {Doppler shift, Doppler spread}

[0057] iii. 'QCL-Type C': {Doppler shift, average delay}

[0058] iv. 'QCL-Type D': {Spatial Rx parameters}.

[0059] For the above QCL types, the QCL source RS can be a synchronization signal block (SSB), CSI-RS, etc.

[0060] Some radio access technologies (such as NR) may support multiple QCL types and / or QCL relationships for a signal (such as a single OFDM signal) included in a single symbol. For example, within a single symbol, NR may support two or more QCL relationships of QCL type A, B, or C and / or a single QCL relationship of QCL type D.

[0061] A transmission configuration indication (TCI) state may be used to indicate the QCL relationship to the UE. For example, a UE may be configured with up to M TCI states, where M is based at least in part on the capabilities of the UE. An information element (e.g., TCI state, etc.) may associate one or more downlink RSs with one or more corresponding QCL types.

[0062] As mentioned above, NR may support multiple different QCL types in a single symbol. This may mean that within a single symbol, multiple reference signals may have different Doppler shift, Doppler spread, average delay, and / or delay spread properties. In this case, the UE may maintain multiple time offsets, frequency offsets, and channel estimators for corresponding channel properties. For example, if the UE is to track two different Doppler offset values, the UE may perform two different frequency offset estimation operations. This consumes significant computational resources and may be difficult or impossible for low complexity, low cost, or low power consumption UEs, such as NR light UEs or reduced capability (RedCap) UEs.

[0063] Some techniques and apparatus described herein provide for selecting a QCL relationship for a channel attribute when two or more different QCL relationships for the channel attribute are defined in a single symbol. For example, the UE may select a QCL relationship from a plurality of QCL relationships for a particular channel attribute, and may use the selected QCL relationship to determine the channel attribute of one or more reference signals in the symbol. In some aspects, the UE may select a corresponding QCL relationship from a corresponding plurality of QCL relationships for a set of channel attributes configured with the corresponding plurality of QCL relationships in the symbol. Some techniques and apparatus described herein provide rules, capability signaling, and configuration signaling for selecting a QCL relationship.

[0064] In this way, the complexity of channel property determination is reduced when multiple QCL relationships are configured. This can save computational resources and reduce the complexity of channel property determination, thereby simplifying channel property determination for low-complexity, low-cost or low-power UEs.

[0065] Figure 3 is a diagram illustrating an example 300 of signaling for configuring and selecting QCL relationships for symbols in accordance with various aspects of the present disclosure. Figure 4-7 4 is a diagram illustrating examples 400, 500, 600, and 700 of selected QCL relationships for reference signals in symbols according to various aspects of the present disclosure. As shown, example 300 includes UE 120 and BS 110.

[0066] like Figure 31 and as shown by reference numeral 310, UE 120 may provide capability information to BS 110. The capability information may identify the capability of UE 120, which is related to receiving multiple signals in a single symbol using one or more QCL relationships for one or more channel attributes. For example, UE 120 may signal that UE 120 supports a single QCL relationship related to the channel attribute for all signals in a single symbol. In this case, UE 120 may support a corresponding single QCL relationship for each channel attribute in a single symbol. In some cases, UE 120 may signal that UE 120 supports a single QCL relationship related to the channel attribute for multiple signals at a resource block granularity or a resource block set granularity. In some aspects, UE 120 may signal that UE 120 may support two or more different QCL relationships related to each channel attribute for multiple signals in the same symbol and the same resource block or the same resource block set. The signal may include RS, such as DMRS of PDCCH, DMRS of PDSCH, CSI-RS, etc.

[0067] As indicated by reference numeral 320, UE 120 may provide information indicating a preferred rule for QCL relationship selection. For example, in some aspects, UE 120 and / or BS 110 may select a QCL relationship from a plurality of QCL relationships to be used for channel attributes in a symbol. UE 120 and / or BS 110 may perform the selection based at least in part on a rule. The rule may be selected by UE 120, may be preconfigured for UE 120, or may be indicated to UE 120 by BS 110. In some aspects, BS 110 may select the rule based at least in part on information received from UE 120 indicating a preferred rule for QCL relationship selection. Examples of these rules are provided elsewhere herein.

[0068] In some aspects, the UE 120 may provide capability information (shown by reference numeral 310) that is specific to the QCL type and / or information indicating a preferred rule for QCL relationship selection (shown by reference numeral 320). For example, the UE may have different capabilities for a QCL relationship of QCL type A (which includes 4 channel attributes) compared to a QCL relationship of QCL type B or C (which each include 2 channel attributes). Thus, the UE may provide capability information or information indicating a preferred rule that is specific to the QCL type, which reduces the likelihood that the UE 120 will over-report or under-report capabilities for a given QCL type. In some aspects, the UE 120 may provide capability information and / or information indicating a preferred rule that is common to all QCL types that may be configured for the UE 120, which reduces overhead relative to providing such information specifically for a QCL type.

[0069] As indicated by reference numeral 330, BS 110 may provide configuration information to UE 120. The configuration information may relate to a plurality of signals in a symbol. For example, the configuration information may indicate a plurality of QCL relationships for one or more channel attributes of the plurality of signals in the symbol. In some aspects, the configuration information may identify a QCL source RS and a QCL type for a signal. For example, the configuration information may indicate a first QCL source RS and a first QCL type for a first signal, and may indicate a second QCL source RS and / or a second QCL type different from the first QCL type for a second signal. In this case, if the first signal and the second signal are in the same symbol, UE 120 may need to track channel attributes corresponding to the first QCL type and the second QCL type of the first QCL source RS and the second QCL source RS, thereby consuming significant computational resources. In this case, UE 120 may select a corresponding single QCL relationship for the channel attribute tracked by UE 120 (e.g., one QCL relationship per channel attribute or multiple QCL relationships for a channel attribute, as described elsewhere herein), thereby saving computational resources. The choice of QCL relationship is described elsewhere herein.

[0070] In some aspects, the configuration information may indicate a configuration from a plurality of possible configurations. For example, the configuration information may indicate a selected TCI state configuration for one or more signals. The selected TCI state configuration may indicate a QCL type and a QCL source RS for the one or more signals. For example, the configuration information may include radio resource control (RRC) information, information elements, downlink control information, and the like. In some aspects, the configuration information may indicate a rule for selecting a QCL relationship, as described elsewhere herein. For example, a TCI field of the configuration information may indicate a rule. In some aspects, the TCI field may indicate corresponding rules for multiple QCL types.

[0071] Some specific examples of configuration of QCL relationships are provided below. Prior to RRC configuration of the tracking reference signal (TRS) and CSI-RS, for both sub-6 GHz and super-6 GHz bands, the SSB can be configured as a QCL source RS for the DMRS of the PDSCH with respect to Doppler shift, Doppler spread, average delay, delay spread, and / or spatial reception (RX) parameters. The SSB can be configured as a QCL source RS for the DMRS of the PDCCH with respect to Doppler shift, Doppler spread, average delay, delay spread, and / or spatial RX parameters. After RRC configuration of the TRS and CSI-RS, for sub-6 GHz frequencies and a single transmit receive point (TRP), the CSI-RS can be configured as a QCL source RS for the DMRS with respect to Doppler shift, Doppler spread, average delay, and / or delay spread (e.g., QCL type A). The CSI-RS can be configured as a QCL source RS (e.g., QCL type B) of a CSI-RS for CSI acquisition with respect to Doppler shift and / or Doppler spread. SSB can be configured as a QCL source RS (e.g., QCL type C) of a TRS with respect to Doppler frequency and / or average delay. After RRC configuration and for the ultra-6 GHz frequency range, SSB may be used as a QCL source RS of a CSI-RS for beam management (BM) in the case of using QCL types C and D. In the case of using QCL type D, SSB may be used as a QCL source RS of a CSI-RS for CSI. In the case of using QCL types A and D, SSB may be used as a QCL source RS of a DMRS for a PDCCH. In the case of using QCL types A and D, SSB may be used as a QCL source RS of a DMRS for a PDSCH. In the case of using QCL type D, the CSI-RS for BM may be used as a QCL source reference signal for a DMRS for a PDCCH and a DMRS for a PDSCH. In the case of using QCL types A and D, the CSI-RS for CSI can be used as the QCL source RS for the DMRS of PDSCH. In the case of using QCL type D, the CSI-RS for BM can be used as the QCL source RS for the CSI-RS of TRS / BM / CSI.

[0072] As indicated by reference numerals 340 and 350, BS 110 and UE 120 may select a QCL relationship to be used for a channel attribute from the plurality of QCL relationships. For example, considering a plurality of signals configured with respective QCL relationships for determining Doppler spread, UE 120 and / or BS 110 may select a QCL relationship from the respective QCL relationships to be used for determining a Doppler spread for each of the plurality of signals (e.g., the same QCL relationship may be used to determine the Doppler spread for all of the plurality of signals). In some aspects, UE 120 and BS 110 may select a respective QCL relationship for each channel attribute in a symbol configured with one or more QCL relationships. Thus, UE 120 and BS 110 may reduce the complexity of determining a channel attribute by reducing the number of QCL relationships to be tracked.

[0073] For an example of two or more signals having the same QCL relationship for channel properties, refer to Figure 4 Example 400 of FIG. 410 shows a QCL source RS (e.g., SSB) for RS1 and RS2. As shown by reference numeral 420, RS1 and RS2 are quasi-colocated with SSB for a channel property. Therefore, as indicated by the dotted lines around RS1 and RS2, RS1 and RS2 are quasi-colocated with each other for the channel property and can be considered to have the same QCL relationship for the channel property.

[0074] Reference numeral 430 shows a QCL source RS (e.g., SSB) of RS 3, and reference numeral 440 shows a QCL source RS (e.g., CSI-RS) of RS 4. As shown, SSB and CSI-RS are quasi-co-located with each other for a channel attribute. Therefore, RS 3 and RS 4 (which are quasi-co-located with SSB and CSI-RS, respectively) have the same QCL relationship for the channel attribute. Thus, RS 3 and RS4 can be regarded as having the same QCL relationship for the channel attribute.

[0075] For an example of selecting QCL relationships for channel properties to be used for multiple signals, refer to Figure 5 Example 500. Example 500 shows RS1 to RS6, which will all be received by UE 120 in the same codeword. In example 500, RS2 is configured as a QCL source RS for RS1 (shown as QCL#1), RS4 is configured as a QCL source RS for RS3 (shown as QCL#2), and RS6 is configured as a QCL source RS for RS5 (shown as QCL#3). QCL#1, QCL#2, and QCL#3 are corresponding QCL relationships related to the same channel attributes. If UE 120 uses the corresponding QCL relationships to determine the channel attributes of RS1, RS2, and RS3, UE 120 will consume significant computing resources.

[0076] Reference numeral 510 shows an example of selecting a single QCL relationship (here, QCL#2) to be used for multiple signals (RS1, RS3, and RS5) in a symbol. As shown, RS1, RS3, and RS5 can use QCL#2 to determine channel properties associated with QCL#2, thereby saving computational resources relative to using QCL#1, QCL#2, and QCL#3 to determine channel properties.

[0077] In some aspects, UE 120 and / or BS 110 may select a QCL relationship based at least in part on a rule. For example, the rule may indicate a priority or order on which the QCL relationship is to be selected, at least in part, based. In some aspects, UE 120 may use the rule to select a QCL relationship. For example, if the DMRS of the PDCCH and the DMRS of the PDSCH have different QCL relationships, the QCL relationship of the PDCCH may be selected. As another example, if the DMRS and CSI-RS of the PDCCH have different QCL relationships, the QCL relationship of the PDCCH may be used. As yet another example, if the DMRS and CSI-RS of the PDSCH have different QCL relationships, the QCL relationship of the PDSCH may be used. In some aspects, BS 110 may configure UE 120 to have an order or rule for selecting a QCL relationship (e.g., using configuration information or another transmission to UE 120). For example, referring to example 500, the rule may indicate that RS3 is associated with the highest priority, so QCL#2 may be selected as the QCL relationship applied to RS1, RS3, and RS5. In some aspects, the rule may vary depending on one or more QCL types. For example, the configuration information indicating the rule may indicate the QCL type to be used to select the QCL relationship. In some aspects, the rule may be common to all QCL types that can be configured for UE 120.

[0078] In some aspects, UE 120 and / or BS 110 may select a QCL relationship based at least in part on previously received downlink symbols. Figure 6Example 600 of . Reference numeral 610 shows symbol M, which is the most recent (e.g., most recently received) signal reception of UE 120. In reference numeral 610, QCL#i,M (meaning QCL relation #i from symbol M) is selected as the QCL relation for RS1, RS3, and RS5. Thus, UE 120 can determine the channel properties of RS1, RS3, and RS5 based on the channel properties of RS4. Reference numeral 620 shows the QCL relation configured for symbol N (wherein symbol N is received after symbol M). As shown, RS1, RS3, and RS5 are associated with corresponding QCL relations that are quasi-co-located with RS2, RS4, and RS6. As shown in reference numeral 630, UE 120 can select QCL#i,M for RS1, RS3, and RS5 in symbol N. Thus, UE 120 can reduce the number of QCL relations to be tracked.

[0079] In some aspects, UE 120 and / or BS110 may support two or more different QCL relationships for signal attributes for multiple signals in a symbol. As a first example, UE 120 and / or BS110 may support a single QCL relationship at a resource block (RB) granularity, where an RB is the number of continuous frequency resources and time resources (e.g., 12 subcarriers multiplied by one or more symbols). In this case, a first QCL relationship may be used for multiple signals and channel attributes in a first RB, and a second QCL relationship may be used for the multiple signals and the channel attributes in a second RB. As a second example, UE 120 and / or BS110 may support a single QCL relationship at an RB set or subband granularity. In this case, a first QCL relationship may be used for multiple signals and channel attributes in a first RB set or a first subband, and a second QCL relationship may be used for the multiple signals and the channel attributes in a second RB set or a second subband. Figure 7 Example 700 illustrates an example where QCL#2 is selected as the QCL relationship for RB#1 or subband#1 (shown by reference numeral 710) and QCL#3 is selected as the QCL relationship for RB#2 or subband#2 (shown by reference numeral 720). In some aspects, RB gaps may be configured between RB sets associated with different QCL relationships. RB gaps may include one or more RBs in which PDCCH, PDSCH, and CSI-RS are not transmitted. For example, an RB gap may be configured between RB#1 and RB#2 or between subband#1 and subband#2.

[0080] In some aspects, the capability information reported by the UE 120 may relate to the number of QCL relations that may be supported in a symbol. For example, the capability information may indicate that the UE 120 may support a single QCL relationship for all signal and channel attributes in a symbol. As another example, the capability information may indicate that the UE 120 may support two or more different QCL relations for multiple signal and channel attributes in a symbol, and may indicate that the two or more different QCL relations may be supported at an RB granularity, an RB set granularity, a subband granularity, and the like. In this case, the capability information may indicate the size of the RB set or subband (e.g., the number of RBs or the bandwidth of the subband).

[0081] like Figure 3 As shown in the reference numeral 360 in FIG. 1 , BS 110 may use the selected QCL relationship to transmit the multiple signals to UE 120. For example, BS 110 may transmit one or more QCL source RSs and the multiple signals. UE 120 may determine the channel properties of the multiple signals according to the selected QCL relationship. Thus, BS 110 and UE 120 reduce the complexity of determining the channel properties of the signals, thereby saving the computing resources of UE 120.

[0082] As indicated above, Figure 3-7 is provided as one or more examples. Other examples may differ from the Figure 3-7 Examples described.

[0083] Figure 8 8 is a diagram illustrating an example process 800 performed, for example, by a UE in accordance with various aspects of the present disclosure. Example process 800 is an example in which a UE (eg, UE 120, etc.) performs operations associated with a quasi-co-located configuration.

[0084] like Figure 8 As shown in , in some aspects, process 800 may include: receiving configuration information indicating multiple QCL relationships to be used for determining channel properties for multiple signals configured in a symbol (block 810). For example, a UE (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, etc.) may receive configuration information indicating multiple QCL relationships to be used for determining channel properties for multiple signals configured in a symbol, as described above.

[0085] like Figure 8As further shown in FIG. 8 , in some aspects, process 800 may include selecting a QCL relationship from the plurality of QCL relationships to be used for determining the channel property and the plurality of signals in the symbol (block 820). For example, the UE (e.g., using controller / processor 280, etc.) may select a QCL relationship from the plurality of QCL relationships to be used for determining the channel property and the plurality of signals in the symbol, as described above.

[0086] like Figure 8 As further shown in FIG. 8 , in some aspects, process 800 may include receiving the plurality of signals according to a selected QCL relationship based at least in part on the channel properties (block 830). For example, the UE (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, etc.) may receive the plurality of signals according to a selected QCL relationship based at least in part on the channel properties, as described above.

[0087] Process 800 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.

[0088] In a first aspect, the plurality of QCL relations are between the plurality of signals and two or more QCL source reference signals in the symbol, and selecting the QCL relation comprises selecting a QCL source reference signal of the two or more QCL source reference signals as a selected QCL source reference signal for a selected QCL relation.

[0089] In a second aspect, either alone or in combination with the first aspect, each of the plurality of signals is quasi-colocated with a selected QCL source reference signal for the channel properties according to a selected QCL relationship, or each of the plurality of signals is quasi-colocated with a QCL source reference signal that is quasi-colocated with the selected QCL source reference signal for the channel properties.

[0090] In a third aspect, either alone or in combination with one or more of the first and second aspects, the channel attribute is one of a set of channel attributes associated with a QCL type, and each channel attribute in the set of channel attributes is associated with a corresponding selected QCL relationship.

[0091] In a fourth aspect, alone or in combination with one or more of the first to third aspects, selecting the QCL relationship is based at least in part on rules configured for the UE.

[0092] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the rule is based at least in part on respective signal types of the plurality of signals or respective signal types of one or more QCL source reference signals of the plurality of signals.

[0093] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the rule is indicated in a transmission configuration indication (TCI) field of the configuration information.

[0094] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the TCI field indicates corresponding rules for multiple QCL types.

[0095] In an eighth aspect, alone or in combination with one or more of the first to sixth aspects, the TCI field indicates a rule common to two or more QCL types.

[0096] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, selecting the QCL relation is based at least in part on a selected QCL relation in a previously received downlink symbol that is associated with the channel property.

[0097] In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the selected QCL relationship is a first selected QCL relationship associated with a first resource block or a first set of resource blocks, and a second selected QCL relationship is selected for a second resource block or a second set of resource blocks.

[0098] In an eleventh aspect, a resource block gap is configured between the first resource block or set of resource blocks and the second resource block or set of resource blocks based at least in part on the first selected QCL relationship being different than the second selected QCL relationship.

[0099] In a twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, process 800 includes transmitting capability information indicating that a common QCL relationship can be supported for the multiple signals in a single codeword, a common QCL relationship can be supported for the multiple signals at a resource block or resource block set granularity, or two or more QCL relationships can be supported for the multiple signals in a single codeword.

[0100] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the capability information varies by QCL type.

[0101] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the capability information is common to two or more QCL types.

[0102] In a fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, process 800 includes transmitting information indicating a preferred rule for selecting the QCL relationship.

[0103] In a sixteenth aspect, alone or in combination with one or more of the first to fifteenth aspects, the information indicates that the preference rule varies by QCL type.

[0104] In a seventeenth aspect, alone or in combination with one or more of the first to sixteenth aspects, the information indicates that the preference rule is common to two or more QCL types.

[0105] although Figure 8 An example block diagram of process 800 is shown, but in some aspects, process 800 may include Figure 8 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 800. Additionally or alternatively, two or more blocks of process 800 may be executed in parallel.

[0106] Fig. 9 is a diagram illustrating an example process 900, performed, for example, by a base station, in accordance with various aspects of the present disclosure. Example process 900 is an example in which a base station (eg, base station 110, etc.) performs operations associated with a quasi-co-located configuration.

[0107] like Fig. 9 As shown in , in some aspects, process 900 may include: selecting a QCL relationship to be used for determining a channel property of a plurality of signals in a symbol from a plurality of QCL relationships, wherein the plurality of QCL relationships are associated with the channel property and configured for the plurality of signals in the symbol (block 910). For example, a base station (e.g., using controller / processor 240, etc.) may select a QCL relationship to be used for determining a channel property of a plurality of signals in a symbol, as described above. In some aspects, the plurality of QCL relationships are associated with the channel property and configured for the plurality of signals in the symbol.

[0108] like Fig. 9 As further shown in FIG. 9 , in some aspects, process 900 may include transmitting the plurality of signals to the UE in accordance with the selected QCL relationship based at least in part on the channel properties (block 920). For example, the base station (e.g., using controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, etc.) may transmit the plurality of signals to the UE in accordance with the selected QCL relationship based at least in part on the channel properties, as described above.

[0109] Process 900 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.

[0110] In a first aspect, the plurality of QCL relations are between the plurality of signals and two or more QCL source reference signals in the symbol, and selecting the QCL relation comprises selecting a QCL source reference signal of the two or more QCL source reference signals as a selected QCL source reference signal for a selected QCL relation.

[0111] In a second aspect, either alone or in combination with the first aspect, each of the plurality of signals is quasi-colocated with a selected QCL source reference signal for the channel properties according to a selected QCL relationship, or each of the plurality of signals is quasi-colocated with a QCL source reference signal that is quasi-colocated with the selected QCL source reference signal for the channel properties.

[0112] In a third aspect, either alone or in combination with one or more of the first and second aspects, the channel attribute is one of a set of channel attributes associated with a QCL type, and each channel attribute in the set of channel attributes is associated with a corresponding selected QCL relationship.

[0113] In a fourth aspect, alone or in combination with one or more of the first to third aspects, selecting the QCL relationship is based at least in part on rules configured for the UE.

[0114] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the rule is based at least in part on respective signal types of the plurality of signals or respective signal types of one or more QCL source reference signals of the plurality of signals.

[0115] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the rule is indicated in a TCI field of configuration information transmitted by the base station.

[0116] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the TCI field indicates corresponding rules for multiple QCL types.

[0117] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the TCI field indicates a rule common to two or more QCL types.

[0118] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, selecting the QCL relation associated with the channel property is based at least in part on a selected QCL relation in a previously received downlink symbol.

[0119] In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the selected QCL relationship is a first selected QCL relationship associated with a first resource block or a first set of resource blocks, and a second selected QCL relationship is selected for a second resource block or a second set of resource blocks.

[0120] In an eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, a resource block gap is provided between the first resource block or first resource block set and the second resource block or second resource block set based at least in part on the first selected QCL relationship being different from the second selected QCL relationship.

[0121] In the twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, process 900 includes receiving capability information from the UE, the capability information indicating: being able to support a common QCL relationship for the multiple signals in a single codeword, being able to support a common QCL relationship for the multiple signals at a resource block or resource block set granularity, or being able to support two or more QCL relationships for the multiple signals in a single codeword.

[0122] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the capability information varies by QCL type.

[0123] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the capability information is common to two or more QCL types.

[0124] In a fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, process 900 includes receiving information indicating a preferred rule for selecting the QCL relationship.

[0125] In a sixteenth aspect, alone or in combination with one or more of the first to fifteenth aspects, the information indicates that the preference rule varies by QCL type.

[0126] In a seventeenth aspect, alone or in combination with one or more of the first to sixteenth aspects, the information indicates that the preference rule is common to two or more QCL types.

[0127] although Fig. 9 An example block diagram of process 900 is shown, but in some aspects, process 900 may include Fig. 9 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 900. Additionally or alternatively, two or more blocks of the process 900 may be executed in parallel.

[0128] The following provides an overview of some aspects of the disclosure:

[0129] Aspect 1: A wireless communication method performed by a user equipment (UE), comprising: receiving configuration information indicating a plurality of quasi-co-located (QCL) relationships to be used for determining channel properties for a plurality of signals configured in a codeword; selecting a QCL relationship to be used for determining the channel properties and the plurality of signals in the codeword from the plurality of QCL relationships; and receiving the plurality of signals according to the selected QCL relationship based at least in part on the channel properties.

[0130] Aspect 2: A method as described in Aspect 1, wherein the multiple QCL relationships are between the multiple signals and two or more QCL source reference signals in the code element, and wherein selecting the QCL relationship includes: selecting a QCL source reference signal from the two or more QCL source reference signals as the selected QCL source reference signal for the selected QCL relationship.

[0131] Aspect 3: A method as described in any of Aspects 1-2, wherein each of the multiple signals is quasi-co-located with a selected QCL source reference signal for the channel properties according to a selected QCL relationship, or each of the multiple signals is quasi-co-located with a QCL source reference signal that is quasi-co-located with the selected QCL source reference signal for the channel properties.

[0132] Aspect 4: The method according to any one of aspects 1-3, wherein the channel attribute is one of a set of channel attributes associated with a QCL type, and each channel attribute in the set of channel attributes is associated with a corresponding selected QCL relationship.

[0133] Aspect 5: The method as described in any one of Aspects 1 to 4, wherein selecting the QCL relationship is based at least in part on a rule configured for the UE.

[0134] Aspect 6: The method of aspect 5, wherein the rule is based at least in part on respective signal types of the plurality of signals or respective signal types of one or more QCL source reference signals of the plurality of signals.

[0135] Aspect 7: The method as described in Aspect 5, wherein the rule is indicated in a transmission configuration indication (TCI) field of the configuration information.

[0136] Aspect 8: The method as described in Aspect 7, wherein the TCI field indicates corresponding rules for multiple QCL types.

[0137] Aspect 9: The method of aspect 7, wherein the TCI field indicates a rule common to two or more QCL types.

[0138] Aspect 10: The method as described in any of aspects 1-9, wherein selecting the QCL relationship is based at least in part on a selected QCL relationship related to the channel property in a previously received downlink codeword.

[0139] Aspect 11: The method of any one of aspects 1-10, wherein the selected QCL relation is a first selected QCL relation associated with a first resource block or a first set of resource blocks, and wherein a second selected QCL relation is selected for a second resource block or a second set of resource blocks.

[0140] Aspect 12: The method of aspect 11, wherein a resource block gap is configured between the first resource block or first resource block set and the second resource block or second resource block set based at least in part on the first selected QCL relationship being different from the second selected QCL relationship.

[0141] Aspect 13: The method as described in any one of Aspects 1-12 further includes: transmitting capability information, which capability information indicates: a common QCL relationship can be supported for the multiple signals in a single codeword, a common QCL relationship can be supported for the multiple signals at the granularity of a resource block or a resource block set, or two or more QCL relationships can be supported for the multiple signals in a single codeword.

[0142] Aspect 14: The method as described in Aspect 13, wherein the capability information varies according to the QCL type.

[0143] Aspect 15: The method of aspect 13, wherein the capability information is common to two or more QCL types.

[0144] Aspect 16: The method according to any one of aspects 1-15, further comprising: transmitting information indicating a preferred rule for selecting the QCL relationship.

[0145] Aspect 17: The method as described in Aspect 16, wherein the information indicating the preferred rule varies depending on the QCL type.

[0146] Aspect 18: The method of aspect 16, wherein the information indicating the preference rule is common to two or more QCL types.

[0147] Aspect 19: A wireless communication method performed by a base station, comprising: selecting a quasi-co-located (QCL) relationship to be used to determine channel properties for multiple signals in a codeword from a plurality of QCL relationships, wherein the plurality of QCL relationships are associated with the channel properties and are configured for the multiple signals in the codeword; and transmitting the multiple signals to a user equipment (UE) according to the selected QCL relationship based at least in part on the channel properties.

[0148] Aspect 20: A method as described in Aspect 19, wherein the multiple QCL relationships are between the multiple signals and two or more QCL source reference signals in the code element, and wherein selecting the QCL relationship includes: selecting a QCL source reference signal from the two or more QCL source reference signals as the selected QCL source reference signal for the selected QCL relationship.

[0149] Aspect 21: A method as described in any of Aspects 19-20, wherein each of the multiple signals is quasi-co-located with a selected QCL source reference signal for the channel properties according to a selected QCL relationship, or each of the multiple signals is quasi-co-located with a QCL source reference signal that is quasi-co-located with the selected QCL source reference signal for the channel properties.

[0150] Aspect 22: The method of any one of aspects 19-21, wherein the channel attribute is one of a set of channel attributes associated with a QCL type, and each channel attribute in the set of channel attributes is associated with a corresponding selected QCL relationship.

[0151] Aspect 23: The method as described in any of aspects 19-22, wherein selecting the QCL relationship is based at least in part on a rule configured for the UE.

[0152] Aspect 24: The method of any one of aspects 19-23, wherein selecting the QCL relation associated with the channel property is based at least in part on a selected QCL relation in a previously received downlink symbol.

[0153] Aspect 25: The method of any one of aspects 19-24, wherein the selected QCL relation is a first selected QCL relation associated with a first resource block or a first set of resource blocks, and wherein a second selected QCL relation is selected for a second resource block or a second set of resource blocks.

[0154] Aspect 26: The method of aspect 25, wherein a resource block gap is provided between the first resource block or first set of resource blocks and the second resource block or second set of resource blocks based at least in part on the first selected QCL relationship being different from the second selected QCL relationship.

[0155] Aspect 27: The method as described in any one of Aspects 19-26 further includes: receiving capability information from the UE, the capability information indicating: being able to support a common QCL relationship for the multiple signals in a single codeword, being able to support a common QCL relationship for the multiple signals at the granularity of a resource block or a resource block set, or being able to support two or more QCL relationships for the multiple signals in a single codeword.

[0156] Aspect 28: The method according to any one of aspects 19-27, further comprising: receiving information indicating a preferred rule for selecting the QCL relationship.

[0157] Aspect 29: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method as in one or more of Aspects 1-28.

[0158] Aspect 30: An apparatus for wireless communication, comprising: a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform the method of one or more aspects of aspects 1-28.

[0159] Aspect 31: An apparatus for wireless communication, comprising: at least one device for performing the method of one or more aspects of Aspects 1-28.

[0160] Aspect 32: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more aspects of aspects 1-28.

[0161] Aspect 33: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform a method as in one or more aspects of aspects 1-28.

[0162] 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.

[0163] As used herein, the term "component" is intended to be broadly interpreted as a combination of hardware and / or hardware and software. Software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and / or functions, etc., whether it is described in software, firmware, middleware, microcode, hardware description language or other terms. As used herein, "processor" is implemented with hardware, and / or a combination of hardware and software. It will be obvious that the systems and / or methods described herein can be implemented in different forms of hardware, and / or a combination of hardware and software. The actual dedicated control hardware or software code for implementing these systems and / or methods does not limit 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.

[0164] 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.

[0165] It will be apparent that the systems and / or methods described herein can be implemented in different forms of hardware, software, 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.

[0166] 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 not specifically described in the claims and / or not disclosed in the specification. Although each dependent claim 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, 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).

[0167] 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 configuration information indicating, for a plurality of signals configured in a symbol, a plurality of quasi-co-located QCL relationships to be used for determining a channel property; selecting a single QCL relationship from the plurality of QCL relationships to be used for determining the channel properties of the plurality of signals in the symbol; as well as The plurality of signals are received according to a selected QCL relationship based at least in part on the channel properties.

2. The method of claim 1, wherein: The plurality of QCL relations are between the plurality of signals and two or more QCL source reference signals in the symbol, and wherein selecting the QCL relation comprises selecting a QCL source reference signal from among the two or more QCL source reference signals as a selected QCL source reference signal for a selected QCL relation.

3. The method of claim 1, wherein: Each signal of the plurality of signals is quasi-colocated with a selected QCL source reference signal for the channel properties according to a selected QCL relationship, or Each signal of the plurality of signals is quasi-colocated with a QCL source reference signal that is quasi-colocated with a selected QCL source reference signal for the channel property.

4. The method of claim 1, wherein: The channel attribute is one of a set of channel attributes associated with a QCL type, and wherein each channel attribute in the set of channel attributes is associated with a respective selected QCL relationship.

5. The method of claim 1, wherein: Selecting the QCL relationship is based at least in part on rules configured for the UE.

6. The method of claim 5, wherein: The rule is based at least in part on respective signal types of the plurality of signals or respective signal types of one or more QCL source reference signals of the plurality of signals.

7. The method of claim 5, wherein: The rule is indicated in the transmission configuration indication TCI field of the configuration information.

8. The method of claim 7, wherein: The TCI field indicates corresponding rules for multiple QCL types.

9. The method of claim 7, wherein: The TCI field indicates a rule common to two or more QCL types.

10. The method of claim 1, wherein: Selecting the QCL relation is based at least in part on a selected QCL relation in a previously received downlink symbol that correlates to the channel property.

11. The method of claim 1, wherein: The selected QCL relation is a first selected QCL relation associated with a first resource block or a first set of resource blocks, and wherein a second selected QCL relation is selected for a second resource block or a second set of resource blocks.

12. The method of claim 11, wherein: A resource block gap is configured between the first resource block or set of resource blocks and the second resource block or set of resource blocks based at least in part on the first selected QCL relationship being different than the second selected QCL relationship.

13. The method of claim 1, further comprising: Transmit capability information, the capability information indicating: A common QCL relationship can be supported for the multiple signals in a single symbol, a common QCL relationship can be supported for the multiple signals at a resource block or resource block set granularity, or Two or more QCL relationships can be supported for the multiple signals in a single symbol.

14. The method of claim 13, wherein: The capability information varies by QCL type.

15. The method of claim 13, wherein: The capability information is common to two or more QCL types.

16. The method of claim 1, further comprising: Information indicating a preferred rule for selecting the QCL relationship is transmitted.

17. The method of claim 16, wherein: The information indicating the preferred rule varies depending on the QCL type.

18. The method of claim 16, wherein: The information indicating the preferred rule is common to two or more QCL types.

19. A wireless communication method performed by a base station, comprising: transmitting configuration information indicating, for a plurality of signals configured in a symbol, a plurality of quasi-co-located QCL relationships to be used for determining a channel property; selecting a single QCL relationship from the plurality of QCL relationships to be used for determining the channel properties of the plurality of signals in the symbol; as well as The plurality of signals are transmitted to a user equipment (UE) according to a selected QCL relationship based at least in part on the channel properties.

20. The method of claim 19, wherein: The plurality of QCL relations are between the plurality of signals and two or more QCL source reference signals in the symbol, and wherein selecting the QCL relation comprises selecting a QCL source reference signal from among the two or more QCL source reference signals as a selected QCL source reference signal for a selected QCL relation.

21. The method of claim 19, wherein: Each signal of the plurality of signals is quasi-colocated with a selected QCL source reference signal for the channel properties according to a selected QCL relationship, or Each signal of the plurality of signals is quasi-colocated with a QCL source reference signal that is quasi-colocated with a selected QCL source reference signal for the channel property.

22. The method of claim 19, wherein: The channel attribute is one of a set of channel attributes associated with a QCL type, and wherein each channel attribute in the set of channel attributes is associated with a respective selected QCL relationship.

23. The method of claim 19, wherein: Selecting the QCL relationship is based at least in part on rules configured for the UE.

24. The method of claim 19, wherein: Selecting the QCL relation associated with the channel property is based at least in part on a selected QCL relation in a previously received downlink symbol.

25. The method of claim 19, wherein: The selected QCL relation is a first selected QCL relation associated with a first resource block or a first set of resource blocks, and wherein a second selected QCL relation is selected for a second resource block or a second set of resource blocks.

26. The method of claim 25, wherein: A resource block gap is provided between the first resource block or set of resource blocks and the second resource block or set of resource blocks based at least in part on the first selected QCL relationship being different than the second selected QCL relationship.

27. The method of claim 19, further comprising: Receive capability information from the UE, the capability information indicating: A common QCL relationship can be supported for the multiple signals in a single symbol, a common QCL relationship can be supported for the multiple signals at a resource block or resource block set granularity, or Two or more QCL relationships can be supported for the multiple signals in a single symbol.

28. The method of claim 19, further comprising: Information indicative of a preferred rule for selecting the QCL relationship is received.

29. A user equipment UE for wireless communication, comprising: one or more memories; as well as one or more processors coupled to the one or more memories, the one or more memories storing instructions, the instructions being executable by the one or more processors to cause the UE to: receiving configuration information indicating, for a plurality of signals configured in a symbol, a plurality of quasi-co-located QCL relationships to be used for determining a channel property; selecting a single QCL relationship from the plurality of QCL relationships to be used for determining the channel properties of the plurality of signals in the symbol; as well as The plurality of signals are received according to a selected QCL relationship based at least in part on the channel properties.

30. A base station for wireless communication, comprising: one or more memories; as well as one or more processors coupled to the one or more memories, the one or more memories storing instructions configurable to be executed by the one or more processors to cause the base station to: transmitting configuration information indicating, for a plurality of signals configured in a symbol, a plurality of quasi-co-located QCL relationships to be used for determining a channel property; selecting a single QCL relationship from the plurality of QCL relationships to be used for determining the channel properties of the plurality of signals in the symbol; as well as The plurality of signals are transmitted to a user equipment (UE) according to a selected QCL relationship based at least in part on the channel properties.

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