Quasi-co-located reference signal for uplink transmission configuration indicator status

Abstract

Certain aspects of the present disclosure provide techniques for quasi co-location (QCL) reference signals for uplink transmission configuration indicator (TCI) states. Example methods generally include: receiving an uplink transmission configuration indicator (TCI) indicating one or more uplink quasi co-location (QCL) types from a plurality of uplink QCL types for one or more source reference signals (RS); and sending an uplink transmission according to the uplink TCI.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. Application No. 17 / 109,248, filed on December 2, 2020, which claims the benefit of and priority to U.S. Provisional Application No. 62 / 948,160, filed on December 13, 2019, both of which are assigned to the assignee of this application and are hereby expressly incorporated herein by reference as if fully set forth below and for all applicable purposes.

[0003] Public domain

[0004] Aspects of the present disclosure relate to wireless communications and, more particularly, to techniques for quasi-colocated reference signals for uplink transmission configuration indicator (TCI) states.

[0005] background

[0006] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcast, etc. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access systems include Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, to name just a few.

[0007] In some examples, a wireless multiple access communication system may include several base stations (BS), each of which is capable of simultaneously supporting communication of multiple communication devices (also referred to as user equipment (UE)). In an LTE or LTE-A network, a set of one or more base stations may define an evolved B node (eNB). In other examples (e.g., in a next generation, new radio (NR), or 5G network), a wireless multiple access communication system may include several distributed units (DUs) (e.g., edge units (EUs), edge nodes (ENs), radio heads (RHs), smart radio heads (SRHs), transmission reception points (TRPs), etc.) in communication with several central units (CUs) (e.g., central nodes (CNs), access node controllers (ANCs), etc.), wherein a set of one or more DUs in communication with a central unit may define an access node (e.g., which may be referred to as a BS, a 5G NB, a next generation B node (gNB or gB node), a transmission reception point (TRP), etc.). A BS or DU may communicate with a set of UEs on downlink channels (eg, for transmissions from the base station or to the UE) and uplink channels (eg, for transmissions from the UE to the BS or DU).

[0008] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, region, and even global level. NR (e.g., 5G NR) is an example of an emerging telecommunication standard. NR is an enhancement set of the LTE mobile standard promulgated by 3GPP. It is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and better integrating with other open standards using OFDMA with cyclic prefix (CP) on downlink (DL) and uplink (UL). To this end, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0009] However, as the demand for mobile broadband access continues to grow, there is a need for further improvements to NR and LTE technologies. Preferably, these improvements should be applicable to other multiple access technologies and the telecommunication standards that employ these technologies.

[0010] Brief Overview

[0011] The systems, methods, and devices of the present disclosure each have several aspects, no single one of which is solely responsible for its desirable attributes. Without limiting the scope of the present disclosure as expressed in the appended claims, some features will now be discussed briefly. After considering this discussion, and particularly after reading the section entitled "Detailed Description," it will be understood how the features of the present disclosure provide advantages including improved communication between access points and stations in a wireless network.

[0012] Certain aspects provide a method for wireless communication performed by a user equipment (UE). The method generally includes receiving an uplink transmission configuration indicator (TCI) indicating one or more uplink quasi co-location (QCL) types for one or more source reference signals (RS). The method generally includes sending an uplink transmission according to the uplink TCI.

[0013] Certain aspects of the present disclosure provide a method for wireless communication by a network entity. The method generally includes sending an uplink TCI to a UE, the uplink TCI indicating one or more QCL types from a plurality of uplink QCL types for one or more RSs. The method generally includes sending at least one of the source RSs to the UE. The method generally includes receiving an uplink transmission from the UE based on the uplink TCI.

[0014] Certain aspects provide an apparatus for wireless communication. The apparatus generally includes at least one processor and a memory coupled to the at least one processor. The memory generally includes code executable by the at least one processor to cause the apparatus to receive an uplink TCI indicating one or more uplink QCL types for one or more source RSs. The memory generally includes code executable by the at least one processor to cause the apparatus to send an uplink transmission according to the uplink TCI.

[0015] Certain aspects provide an apparatus for wireless communication. The apparatus generally includes at least one processor and a memory coupled to the at least one processor. The memory generally includes code executable by the at least one processor to cause the apparatus to perform the following operations: send an uplink TCI to a UE, the uplink TCI indicating one or more QCL types from a plurality of uplink QCL types for one or more RSs. The memory generally includes code executable by the at least one processor to cause the apparatus to send at least one of the source RSs to the UE. The memory generally includes code executable by the at least one processor to cause the apparatus to receive an uplink transmission from the UE based on the uplink TCI.

[0016] Certain aspects provide an apparatus for wireless communication. The apparatus generally includes means for receiving an uplink TCI indicating one or more uplink QCL types for one or more source RSs. The apparatus generally includes means for sending an uplink transmission based on the uplink TCI.

[0017] Certain aspects of the present disclosure provide an apparatus for wireless communication. The apparatus generally includes means for sending an uplink TCI to a UE, the uplink TCI indicating one or more QCL types from a plurality of uplink QCL types for one or more RSs. The apparatus generally includes means for sending at least one of the source RSs to the UE. The apparatus generally includes means for receiving an uplink transmission from the UE based on the uplink TCI.

[0018] Certain aspects provide a computer-readable medium having computer-executable code stored thereon for wireless communication. The computer-readable medium generally includes code for receiving an uplink TCI indicating one or more uplink QCL types for one or more source RSs. The computer-readable medium generally includes code for sending an uplink transmission based on the uplink TCI.

[0019] Certain aspects of the present disclosure provide a computer-readable medium having computer-executable code stored thereon for wireless communication. The computer-readable medium generally includes code for sending an uplink TCI to a UE, the uplink TCI indicating one or more QCL types from a plurality of uplink QCL types for one or more RSs. The computer-readable medium generally includes code for sending at least one of the source RSs to the UE. The computer-readable medium generally includes code for receiving an uplink transmission from the UE based on the uplink TCI.

[0020] To achieve the foregoing and related ends, the one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail certain illustrative features of the one or more aspects. However, these features are only indicative of several of the various ways in which the principles of the various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to understand in detail the manner in which the above-stated features of the present disclosure are used, a more particular description of the content briefly summarized above may be made with reference to various aspects, some of which are illustrated in the accompanying drawings. It should be noted, however, that the accompanying drawings illustrate only certain typical aspects of the present disclosure and are not to be considered limiting of its scope, as the description may admit to other equally effective aspects.

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

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

[0025] Figure 3is a diagram illustrating an example physical architecture of a distributed RAN in accordance with certain aspects of the present disclosure.

[0026] Figure 4 is a block diagram conceptually illustrating designs of example base stations (BSs) and user equipment (UEs) in accordance with certain aspects of the present disclosure.

[0027] Figure 5 is a diagram illustrating an example for implementing a communication protocol stack in accordance with certain aspects of the present disclosure.

[0028] Figure 6 An example of a frame format for a New Radio (NR) system is illustrated in accordance with certain aspects of the present disclosure.

[0029] Figure 7 Illustrated are different synchronization signal blocks (SSBs) transmitted using different beams in accordance with certain aspects of the present disclosure.

[0030] Figure 8 Exemplary transmission resource mappings according to aspects of the present disclosure are shown.

[0031] Fig. 9 is a table illustrating example uplink transmission configuration indicator (TCI) states in accordance with certain aspects of the present disclosure.

[0032] Fig.10 is a flow diagram illustrating example operations for wireless communications by a UE in accordance with certain aspects of the present disclosure.

[0033] Fig.11 is a flow diagram illustrating example operations for wireless communications by a network entity in accordance with certain aspects of the present disclosure.

[0034] Fig.12 is a block diagram illustrating a communication device that may include various components configured to perform operations of the various techniques disclosed herein in accordance with aspects of the present disclosure.

[0035] Fig.13 is a block diagram illustrating a communication device that may include various components configured to perform operations of the various techniques disclosed herein in accordance with aspects of the present disclosure.

[0036] To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized in other aspects without specific recitation.

[0037] Detailed Description

[0038] Aspects of the present disclosure provide apparatus, devices, methods, processing systems, and computer-readable media for quasi co-located (QCL) reference signals for uplink transmission configuration indicator (TCI) states.

[0039] Aspects of the present disclosure may help provide a unified framework for uplink and downlink TCI states. In the unified framework, a base station (BS) may configure and / or indicate antenna panel-specific transmissions for uplink transmissions via uplink TCI.

[0040] The following description provides an example of a QCL RS for a TCI state, but does not limit the scope, applicability, or examples set forth in the claims. Changes may be made to the functions and arrangements of the elements discussed without departing from the scope of the present disclosure. Various examples may appropriately omit, replace, or add various procedures or components. For example, the described method may be performed in an order different from the order described, and various steps may be added, omitted, or combined. Moreover, the features described with reference to some examples may be combined in some other examples. For example, any number of aspects set forth herein may be used to implement a device or practice a method. In addition, the scope of the present disclosure is intended to cover such devices or methods practiced using other structures, functionalities, or structures and functionalities that are supplementary to or in addition to the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein may be implemented by one or more elements of the claims. The word "exemplary" is used herein to mean "used as an example, instance, or illustration". Any aspect described herein as "exemplary" is not necessarily to be interpreted as being superior to or superior to other aspects.

[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, subcarrier, frequency channel, frequency modulation, subband, 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, a new radio (NR) RAT network may be deployed.

[0042] The techniques described herein can be used for various wireless networks and radio technologies. Although various aspects may be described herein using terms typically associated with 3G, 4G, and / or new radio (e.g., 5G NR) wireless technologies, various aspects of the present disclosure may be applied in communication systems based on other generations.

[0043] NR access (e.g., 5G technology) can support various wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth, millimeter wave (mmW) targeting high carrier frequency, massive machine type communication MTC (mMTC) targeting non-backward compatible MTC technology, and / or mission critical services targeting ultra-reliable low latency communication (URLLC). These services may include latency and reliability requirements. These services may also have different transmission time intervals (TTIs) to meet corresponding quality of service (QoS) requirements. In addition, these services can coexist in the same subframe.

[0044] The electromagnetic spectrum is typically subdivided into various classes, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz–7.125 GHz) and FR2 (24.25 GHz–52.6 GHz). Frequencies between FR1 and FR2 are typically referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is typically (interchangeably) referred to as the “sub-6 GHz band” in various documents and articles. Similar naming issues sometimes arise regarding FR2, which is typically (interchangeably) referred to as the “millimeter wave” band in various documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as the “millimeter wave” band by the International Telecommunication Union (ITU).

[0045] In view of the above aspects, unless otherwise specifically stated, it should be understood that if used in this document, the term sub-"6GHz" and the like can broadly refer to frequencies that can be less than 6GHz, can be within FR1, or can include mid-band frequencies. In addition, unless otherwise specifically stated, it should be understood that if used in this document, the term "millimeter wave" and the like can broadly refer to frequencies that can include mid-band frequencies, can be within FR2, or can be within the EHF band.

[0046] NR supports beamforming and the beam direction can be dynamically configured. MIMO transmission with precoding can also be supported. MIMO configuration in DL can support multiple (up to 8) transmit antennas (multi-layer DL transmission with up to 8 streams) and multiple (up to 2) streams per UE. Aggregation of multiple cells (e.g., up to 8 serving cells) can be supported.

[0047] Figure 1 An example wireless communication network 100 (e.g., an NR / 5G network) is illustrated in which aspects of the present disclosure may be performed. Figure 1As shown in , the wireless communication network 100 may be in communication with a core network 132. The core network 132 may be in communication with one or more base stations (BSs) 110a-z (also each individually referred to herein as BS 110 or collectively referred to herein as BS 110) and / or user equipments (UEs) 120a-y (also each individually referred to herein as UE 120 or collectively referred to herein as UE 120) in the wireless communication network 100 via one or more interfaces.

[0048] According to certain aspects, BS 110 and UE 120 may be configured for a quasi co-located (QCL) reference signal in an uplink transmission configuration indicator (TCI) state. Figure 1 As shown in , BS 110a includes a TCI state manager 112. According to aspects of the present disclosure, the TCI state manager 112 can be configured to send an uplink TCI, which indicates one or more uplink quasi co-location (QCL) types from a plurality of uplink QCL types for one or more source reference signals (RS). UE 120a includes a TCI state manager 122. According to aspects of the present disclosure, the TCI state manager 122 can be configured to receive an uplink TCI, which indicates one or more uplink QCL types from a plurality of uplink QCL types for one or more source RS.

[0049] BS 110a may provide communication coverage for a particular geographic area (sometimes referred to as a "cell"), which may be stationary or mobile depending on the location of a mobile BS. In some examples, BSs 110 may be interconnected to each other and / or to one or more other BSs 110 or network nodes (not shown) in wireless communication network 100 via various types of backhaul interfaces (e.g., direct physical connections, wireless connections, virtual networks, etc.) using any suitable transport network. Figure 1 In the example shown in FIG. 1 , BSs 110a, 110b, and 110c may be macro BSs for macro cells 102a, 102b, and 102c, respectively. BS 110x may be a pico BS for pico cell 102x. BSs 110y and 110z may be femto BSs for femto cells 102y and 102z, respectively. A BS may support one or more (e.g., three) cells.

[0050] The network controller 130 may be coupled to a set of BSs and provide coordination and control of the BSs. The network controller 130 may communicate with the BSs 110 via a backhaul. In various aspects, the network controller 130 may be in communication with a core network 132 (e.g., a 5G core network (5GC)), which provides various network functions such as access and mobility management, session management, user plane functions, policy control functions, authentication server functions, unified data management, application functions, network open functions, network repository functions, network slice selection functions, etc.

[0051] The BS 110 communicates with the UE 120 in the wireless communication network 100. The UEs 120 (e.g., 120x, 120y, etc.) may be dispersed throughout the wireless communication network 100, and each UE 120 may be stationary or mobile. The wireless communication network 100 may also include a relay station (e.g., relay station 110r) (also referred to as a relay, etc.) that receives transmissions of data and / or other information from an upstream station (e.g., BS 110a or UE 120r) and sends transmissions of data and / or other information to a downstream station (e.g., UE 120 or BS 110), or that relays transmissions between UEs 120 to facilitate communication between the devices.

[0052] Figure 2 An example logical architecture of a distributed radio access network (RAN) 200 is illustrated. Figure 1 200. The 5G access node 206 may include an access node controller (ANC) 202. The ANC 202 may be a central unit (CU) of the distributed RAN 200. The backhaul interface to the next generation core network (NG-CN) 204 may be terminated at the ANC 202. The backhaul interface to the adjacent next generation access node (NG-AN) 210 may be terminated at the ANC 202. The ANC 202 may include one or more transmit receive points (TRPs) 208 (e.g., cellular cells, BSs, gNBs, etc.).

[0053] The TRP 208 may be a distributed unit (DU). The TRP 208 may be connected to a single ANC (e.g., ANC 202) or more than one ANC (not illustrated). For example, for RAN sharing, Radio as a Service (RaaS), and service-specific ANC deployments, the TRP 208 may be connected to more than one ANC. Each of the TRPs 208 may include one or more antenna ports. The TRPs 208 may be configured to serve traffic to the UE individually (e.g., dynamically selected) or jointly (e.g., jointly transmitted).

[0054] The logical architecture of the distributed RAN 200 can support various backhaul and fronthaul solutions. This support can occur via and across different deployment types. For example, the logical architecture can be based on transport network capabilities (e.g., bandwidth, latency, and / or jitter).

[0055] The logical architecture of the distributed RAN 200 may share features and / or components with LTE. For example, the next generation access node (NG-AN) 210 may support dual connectivity with NR and may share a common fronthaul for LTE and NR.

[0056] The logical architecture of the distributed RAN 200 may enable collaboration between and among TRPs 208, for example, within a TRP and / or across TRPs via the ANC 202. An inter-TRP interface may not be used.

[0057] Logical functions may be dynamically distributed in the logical architecture of the distributed RAN 200. Figure 5 Described in more detail, the radio resource control (RRC) layer, the packet data convergence protocol (PDCP) layer, the radio link control (RLC) layer, the medium access control (MAC) layer, and the physical (PHY) layer can be adaptively placed at the DU (e.g., TRP 208) or the CU (e.g., ANC 202).

[0058] Figure 3 An example physical architecture of a distributed radio access network (RAN) 300 is illustrated in accordance with aspects of the present disclosure. A centralized core network unit (C-CU) 302 may host core network functions. The C-CU 302 may be centrally deployed. C-CU 302 functionality may be offloaded (e.g., to advanced wireless services (AWS)) in an effort to handle peak capacity.

[0059] A centralized RAN unit (C-RU) 304 may host one or more ANC functions. Optionally, the C-RU 304 may host core network functions locally. The C-RU 304 may have a distributed deployment. The C-RU 304 may be close to the edge of the network.

[0060] The DU 306 may host one or more TRPs (edge ​​node (EN), edge unit (EU), radio head (RH), smart radio head (SRH), etc.) The DU may be located at the edge of the network with radio frequency (RF) functionality.

[0061] Figure 4 1 and 120a (eg, in the example embodiment of the present invention) that can be used to implement various aspects of the present disclosure. Figure 1 Example components of the wireless communication network 100).

[0062] At BS 110a, a transmit processor 420 may receive data from a data source 412 and control information from a controller / processor 440. The control information may be for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ indicator channel (PHICH), a physical downlink control channel (PDCCH), a group common PDCCH (GC PDCCH), etc. The data may be for a physical downlink shared channel (PDSCH), etc. A medium access control (MAC)-control element (MAC-CE) is a MAC layer communication structure that may be used for control command exchange between wireless nodes. The MAC-CE may be carried in a shared channel such as a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), or a physical sidelink shared channel (PSSCH).

[0063] The processor 420 may process (e.g., encode and symbol map) data and control information to obtain data symbols and control symbols, respectively. The transmit processor 420 may also generate reference symbols (such as for a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a PBCH demodulation reference signal (DMRS), and a channel state information reference signal (CSI-RS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 430 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, and / or reference symbols where applicable, and may provide an output symbol stream to a modulator (MOD) in a transceiver 432a-432t. Each modulator in the transceiver 432a-432t may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. Downlink signals from the modulators in transceivers 432a-432t may be transmitted via antennas 434a-434t, respectively.

[0064] At UE 120a, antennas 452a-452r may receive downlink signals from BS 110a and may provide received signals to demodulators (DEMODs) in transceivers 454a-454r, respectively. Each demodulator in transceivers 454a-454r may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples. Each demodulator may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. MIMO detector 456 may obtain received symbols from all demodulators in transceivers 454a-454r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. Receive processor 458 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 120a to data sink 460, and provide decoded control information to controller / processor 480.

[0065] On the uplink, at the UE 120a, a transmit processor 464 may receive and process data from a data source 462 (e.g., for a physical uplink shared channel (PUSCH)) and control information from a controller / processor 480 (e.g., for a physical uplink control channel (PUCCH)). The transmit processor 464 may also generate reference symbols for a reference signal (e.g., a sounding reference signal (SRS)). The symbols from the transmit processor 464 may be precoded by a TX MIMO processor 466 where applicable, further processed by a modulator in the transceivers 454a-454r (e.g., for SC-FDM, etc.), and transmitted to the BS 110a. At BS 110a, the uplink signal from UE 120a may be received by antenna 434, processed by demodulators in transceivers 432a-432t, detected by MIMO detector 436 if applicable, and further processed by receive processor 438 to obtain decoded data and control information sent by UE 120a. Receive processor 438 may provide decoded data to data sink 439 and decoded control information to controller / processor 440.

[0066] Memories 442 and 482 may store data and program codes for BS 110a and UE 120a, respectively.A scheduler 444 may schedule UEs for data transmission on the downlink and / or uplink.

[0067] The antennas 452, processors 466, 458, 464 and / or controller / processor 480 of the UE 120a, and / or the antennas 434, processors 420, 430, 438 and / or controller / processor 440 of the BS 110a may be used to perform the various techniques and methods described herein. Figure 2As shown in FIG. 1 , according to various aspects described herein, the controller / processor 440 of BS 110a has a TCI state manager 441 that sends an uplink TCI to the UE, the uplink TCI indicating one or more QCL types from a plurality of uplink QCL types for one or more RSs. Figure 2 As shown in , according to various aspects described herein, the controller / processor 480 of the UE 120a has a TCI state manager 481 that receives an uplink TCI indicating one or more QCL types from a plurality of uplink QCL types for one or more RSs. Although shown at the controller / processor, other components of the UE 120a and the BS 110a may also be used to perform the operations described herein.

[0068] Figure 5 Illustrated is a diagram 500 showing an example for implementing a communication protocol stack according to various aspects of the present disclosure. The illustrated communication protocol stack may be implemented by a device operating in a wireless communication system, such as a 5G system (e.g., a system supporting uplink-based mobility). Diagram 500 illustrates a communication protocol stack including a radio resource control (RRC) layer 510, a packet data convergence protocol (PDCP) layer 515, a radio link control (RLC) layer 520, a medium access control (MAC) layer 525, and a physical (PHY) layer 530. In various examples, these layers of the protocol stack may be implemented as separate software modules, parts of a processor or ASIC, parts of non-co-located devices connected by a communication link, or various combinations thereof. Co-located and non-co-located implementations may be used, for example, in a protocol stack for a network access device (e.g., AN, CU, and / or DU) or a UE.

[0069] The first option 505-a illustrates a split implementation of the protocol stack, where the implementation of the protocol stack is performed on a centralized network access device (e.g., Figure 2 ANC 202 in the system) and distributed network access equipment (e.g., Figure 2 In the first option 505-a, the RRC layer 510 and the PDCP layer 515 may be implemented by a central unit, while the RLC layer 520, the MAC layer 525, and the PHY layer 530 may be implemented by the DU. In various examples, the CU and the DU may be co-located or non-co-located. The first option 505-a may be useful in a macro cell, a micro cell, or a pico cell deployment.

[0070] The second option 505-b shows a unified implementation of the protocol stack, where the protocol stack is implemented in a single network access device. In the second option, the RRC layer 510, the PDCP layer 515, the RLC layer 520, the MAC layer 525, and the PHY layer 530 can each be implemented by an AN. The second option 505-b can be useful in, for example, a femtocell deployment.

[0071] Regardless of whether the network access device implements part or all of the protocol stack, the UE can implement the entire protocol stack (e.g., RRC layer 510, PDCP layer 515, RLC layer 520, MAC layer 525, and PHY layer 530) as shown in 505-c.

[0072] NR can utilize orthogonal frequency division multiplexing (OFDM) with cyclic prefix (CP) on uplink and downlink. NR can support half-duplex operation using time division duplex (TDD). OFDM and single carrier frequency division multiplexing (SC-FDM) divide the system bandwidth into multiple orthogonal subcarriers, which are also often called frequency modulation, frequency slot, etc. Each subcarrier can be modulated with data. Modulation code elements can be sent in the frequency domain under OFDM and in the time domain under SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers can depend on the system bandwidth. The minimum resource allocation (so-called resource block (RB)) can be 12 consecutive subcarriers. The system bandwidth can also be divided into subbands. For example, one subband can cover multiple RBs. NR can support a base subcarrier spacing (SCS) of 15KHz, and other SCSs (e.g., 30kHz, 60kHz, 120kHz, 240kHz, etc.) can be defined relative to the base SCS.

[0073] Figure 6 600 for NR. The transmission timeline of each of the downlink and uplink may be divided into units of radio frames. Each radio frame may have a predetermined duration (e.g., 10 ms) and may be divided into 10 subframes with indices 0 to 9, each subframe being 1 ms. Each subframe may contain a variable number of slots (e.g., 1, 2, 4, 8, 16, ... slots), depending on the SCS. Each slot may include a variable number of symbol periods (e.g., 7, 12, or 14 symbols), depending on the SCS. An index may be assigned to the symbol period in each slot. The subslot structure may refer to a transmission time interval having a duration less than a slot (e.g., 2, 3, or 4 symbols). Each symbol in a slot may be configured as a link direction (e.g., DL, UL, or flexible) for data transmission, and the link direction for each subframe may be dynamically switched. The link direction may be based on the slot format. Each time slot may include DL / UL data and DL / UL control information.

[0074] In NR, synchronization signal blocks (SSBs) are transmitted. In certain aspects, each SSB may be transmitted in a burst, where each SSB in the burst corresponds to a different beam direction for UE-side beam management (e.g., including beam selection and / or beam refinement). The SSBs include the PSS, SSS, and a two-symbol PBCH. The SSBs may be transmitted at fixed timeslot locations (such as Figure 3 ) is transmitted in the codewords 0-3 shown in . PSS and SSS can be used by UE for cell search and acquisition. PSS can provide half-frame timing, and SS can provide CP length and frame timing. PSS and SSS can provide cell identity. PBCH carries some basic system information, such as downlink system bandwidth, timing information within radio frames, SS burst set periodicity, system frame number, etc. SSB can be organized into SS bursts to support beam sweeping. Further system information (such as remaining minimum system information (RMSI), system information block (SIB), other system information (OSI)) can be transmitted on the physical downlink shared channel (PDSCH) in certain subframes. SSB can be transmitted up to 64 times, for example, up to 64 different beam directions for mmW. Multiple transmissions of SSB are called SS burst sets. SSBs in an SS burst set can be transmitted in the same frequency region, while SSBs in different SS burst sets can be transmitted in different frequency regions.

[0075] like Figure 7 As shown in the figure, SS blocks can be organized into SS burst sets to support beam sweeping. As shown in the figure, each SSB in the burst set can be transmitted using a different beam, which can help the UE quickly acquire the transmit (Tx) and receive (Rx) beams (for example, for mmW applications). The UE can decode the physical cell identity (PCI) from the PSS and SSS of the SSB.

[0076] Certain deployment scenarios may include one or two NR deployment options. An option may be configured for non-standalone (NSA) and / or standalone (SA) options. Standalone cells may need to broadcast both SSBs and remaining minimum system information (RMSI) (e.g., using SIB1 and SIB2). Non-standalone cells may only need to broadcast SSBs without broadcasting RMSI. In a single carrier of NR, multiple SSBs may be sent at different frequencies and may include different types of SSBs.

[0077] The operating characteristics of a gNB in ​​an NR communication system may depend on the frequency range (FR) in which the system operates. The frequency range may include one or more operating bands (e.g., "n1" band, "n2" band, "n7" band, and "n41" band, etc.). A communication system (e.g., one or more gNBs and UEs) may operate in one or more operating bands.

[0078] A control resource set (CORESET) for an orthogonal frequency division multiple access (OFDMA) system (e.g., a communication system that uses an OFDMA waveform to transmit a physical downlink control channel (PDCCH)) may include one or more sets of control resources (e.g., time and frequency resources) configured within the system bandwidth for communicating the PDCCH. Within each CORESET, one or more search spaces (e.g., a common search space (CSS), a UE-specific search space (USS), etc.) may be defined for a given UE. A search space is generally an area or portion where a communication device (e.g., a UE) can search for (e.g., monitor) control information.

[0079] A CORESET may be defined in units of resource element groups (REGs). Each REG may include a fixed number (e.g., twelve) of tones in one symbol period (e.g., a symbol period of a time slot), where one tone in one symbol period is referred to as a resource element (RE). A fixed number of REGs may be included in a control channel element (CCE). CCE sets may be used to transmit a new radio PDCCH (NR-PDCCH), where different numbers of CCEs in each set are used to transmit the NR-PDCCH using different aggregation levels. Multiple CCE sets may be defined as search spaces for UEs. The gNB may transmit an NR-PDCCH to the UE in a set of CCEs referred to as decoding candidates within the search space for the UE. The UE may receive the NR-PDCCH by searching (e.g., monitoring) and decoding the NR-PDCCH in the search space.

[0080] During initial access, the UE may identify an initial CORESET (e.g., referred to as CORESET#0) configuration from an indication field (e.g., pdcchConfigSIB1 field) in system information (e.g., in a master information block (MIB) carried in the PBCH). This initial CORESET may then be used to configure the UE (e.g., with other CORESETs and / or bandwidth parts via dedicated (UE-specific) signaling). When the UE detects a control channel in the CORESET, the UE attempts to decode the control channel, and the UE communicates with a transmitting base station (e.g., a transmitting cell) based on control information provided in the decoded control channel.

[0081] When a UE is connected to a cell (or BS), the UE may receive a master information block (MIB). The MIB may be in a synchronization signal and physical broadcast channel (SS / PBCH) block on a sync raster (e.g., in the PBCH of a SS / PBCH block). In some scenarios, the sync raster may correspond to an SSB. Based on the frequency of the sync raster, the UE may determine the operating frequency band of the cell. Based on the operating frequency band of the cell, the UE may determine the minimum channel bandwidth and subcarrier spacing (SCS) of the channel. The UE may then determine an index based on the MIB (e.g., four bits in the MIB conveying an index in the range 0-15).

[0082] Given this index, the UE can look up or locate the CORESET configuration (this initial CORESET configured via the MIB is generally referred to as CORESET#0). This can be done according to one or more tables of CORESET configurations. These configurations (including single table scenarios) may include various subsets of indices indicating valid CORESET configurations for various combinations of minimum channel bandwidth and SCS. In some arrangements, each combination of minimum channel bandwidth and SCS may be mapped to a subset of indices in a table.

[0083] Alternatively or additionally, the UE may select a search space CORESET configuration table from several tables of CORESET configurations. These configurations may be based on the minimum channel bandwidth and the SCS. The UE may then look up the CORESET configuration (e.g., Type0-PDCCH search space CORESET configuration) from the selected table based on the index. After determining the CORESET configuration (e.g., from a single table or a selected table), the UE may then determine the CORESET to monitor based on the location (in time and frequency) of the SS / PBCH blocks and the CORESET configuration (as mentioned above).

[0084] Figure 8 An example transmission resource mapping 800 is shown in accordance with aspects of the present disclosure. In the mapping, a BS (e.g., Figure 1 BS 110a) shown in FIG. transmits SS / PBCH block 802. The SS / PBCH block includes a MIB that conveys an index to a table that relates the time and frequency resources of a CORESET 804 to the time and frequency resources of the SS / PBCH block.

[0085] The BS may also transmit control signaling. In some scenarios, the BS sends control signaling to the UE (e.g., Figure 1804). The UE 120a shown in FIG. 804 transmits control signaling to the UE 120a). The PDCCH may schedule the PDSCH 806. The BS then transmits the PDSCH 806 to the UE. The UE may receive the MIB in the SS / PBCH block 802, determine an index, look up the CORESET configuration based on the index, and determine the CORESET 804 from the CORESET configuration and the SS / PBCH block. The UE may then monitor the CORESET 804, decode the PDCCH in the CORESET 804, and receive the PDSCH 806 allocated by the PDCCH.

[0086] Different CORESET configurations may have different parameters defining the corresponding CORESET. For example, each configuration may indicate the number of resource blocks (e.g., 24, 48, or 96), the number of symbols (e.g., 1-3), and an offset indicating a location on frequency (e.g., 0-38 RBs).

[0087] As discussed above, aspects of the present disclosure are related to QCL reference signals for uplink TCI states.

[0088] It may be desirable for a UE to know which assumptions the UE may make on the channel for different transmissions. For example, the UE should know which reference signals the UE may use to estimate the channel in order to decode the transmitted signal (e.g., PDCCH or PDSCH). For the purposes of scheduling, link adaptation, and / or beam management, it may be desirable for the UE to be able to report relevant channel state information (CSI) to the BS. In NR, the concepts of QCL and TCI states are used to convey information about these assumptions.

[0089] QCL assumptions are generally defined in terms of channel properties. For example, 3GPP TS 38.214 defines QCL as "Two antenna ports are said to be quasi-colocated if the properties of the channel over which the symbols on one antenna port are conveyed can be inferred from the channel over which the symbols on the other antenna port are conveyed". Different reference signals (RS) can be considered to be quasi-colocated (QCLed) if the receiver can apply the channel properties determined by detecting the first reference signal to help detect the second signal. TCI states generally include configurations such as QCL relationships (such as the relationship between a downlink (DL) source RS and a target PDSCH demodulation reference signal (DMRS) port in a CSI reference signal (CSI-RS) set).

[0090] In some cases, a UE may be configured with up to M TCI states. The configuration of the M TCI states may be via higher layer signaling (e.g., a higher layer parameter TCIState). The UE may be signaled to decode the PDSCH based on a detected PDCCH with downlink control information (DCI) indicating one of the TCI states. Each configured TCI state may include an RS set (e.g., via a higher layer parameter TCI-RS-SetConfig) that indicates different QCL assumptions between certain source and target signals.

[0091] QCL signaling may be provided to RSs and channels across scenarios involving multiple cells, such as in a coordinated multi-point (CoMP) scenario where multiple transmit reception points (TRPs) or integrated access and backhaul (IAB) nodes each have their own cell ID.

[0092] Fig. 9 is a table 900 illustrating an example of an association of DL reference signals with corresponding QCL types that may be indicated by a parameter (eg, TCI-RS-SetConfig).

[0093] Table 900 shows the source RS, target RS and QCL type assumptions that can be configured by the valid UL-TCI state configuration. The target signal generally refers to a signal whose channel properties can be inferred by measuring those channel properties for the associated source signal. As mentioned above, the UE can use the source RS to determine various channel parameters depending on the associated QCL type, and use those various channel properties (determined based on the source RS) to process the target signal. Examples of source RS include phase tracking reference signal (PTRS), SSB, sounding reference signal (SRS) and / or CSI-RS (e.g., CSI-RS for beam management). Examples of target RS include non-periodic tracking reference signal (TRS), periodic TRS, PRACH, PUCCH and / or PUSCH. QCL types include QCL types A / B / C / D discussed below.

[0094] For the case of two source RSs, different QCL types may be configured for the same target RS. In the illustrative example, SSB is associated with type C QCL for P-TRS, while CSI-RS for beam management (CSI-RS-BM) is associated with type D QCL.

[0095] The QCL type indicated to the UE may be based on a higher layer parameter (e.g., a higher layer parameter QCL type). The QCL type may be one of the following types or a combination thereof:

[0096] QCL Type A: {Doppler shift, Doppler spread, average delay, delay spread},

[0097] QCL type B: {Doppler shift, Doppler spread},

[0098] QCL Type C: {average delay, Doppler shift}, and

[0099] QCL type D: {spatial Rx parameters},

[0100] The spatial QCL assumption (QCL type D) may be used to help the UE select a simulated receive (Rx) beam (eg, during a beam management procedure). For example, the SSB resource indicator may indicate that the same beam used for a previous reference signal should be used for a subsequent transmission.

[0101] An information element (e.g., CORESET IE) sent via RRC signaling may convey information about the CORESET configured for the UE. The CORESET IE generally includes a CORESET ID, an indication of the frequency domain resources (e.g., number of RBs) assigned to the CORESET, the continuous time duration of the CORESET in number of symbols, and the TCI status.

[0102] As mentioned above, the TCI state subset provides a QCL relationship between the DL RS(s) in one RS set (e.g., TCI set) and another signal (e.g., a DMRS port for another transmission). The specific TCI state for a given UE (e.g., for unicast PDCCH) can be communicated to the UE by the MAC-CE. The TCI state can be selected from the TCI state set communicated by the CORESET IE, where the initial CORESET (CORESET#0) is generally configured via the MIB.

[0103] Search space information may also be provided via RRC signaling. For example, the Search Space IE is another RRC IE that defines how and where to search for PDCCH candidates for a given CORESET. Each search space is associated with a CORESET. The Search Space IE identifies the search space configured for the CORESET by the Search Space ID. In one aspect, the Search Space ID associated with CORESET#0 is Search Space ID#0. The search space is generally configured via the PBCH (e.g., carried in the MIB).

[0104] Various aspects of the present disclosure relate to techniques for QCL reference signals for uplink TCI states.

[0105] Example QCL reference signal for uplink TCI state

[0106] According to various aspects of the present disclosure, a base station (BS) and a user equipment (UE) may have a transmission configuration indicator (TCI) framework for downlink and / or uplink beam indication. The BS may configure and / or indicate panel-specific transmissions for uplink transmissions via an uplink TCI framework or a panel ID. If the BS uses an uplink TCI framework, in some systems, uplink TCI-based signaling is supported, in which a new panel identifier (ID) may or may not be introduced, and panel-specific signaling is performed using uplink TCI states.

[0107]

[0013] Various aspects of the present disclosure relate to utilizing uplink TCI to include a quasi co-location (QCL) type so that a UE may be aware of what assumptions the UE may make for different transmissions on a channel.

[0108] If the BS uses a panel ID, the panel ID may be implicitly or explicitly applied to transmissions for a target RS resource or resource set. The target RS resource may be a physical uplink control channel (PUCCH) resource, a sounding reference signal (SRS) resource, a physical uplink shared channel (PUSCH) resource, and / or a physical random access channel (PRACH) resource.

[0109] For the TCI framework for downlink and / or uplink beam indication, the uplink TCI may indicate a source reference signal (RS) associated with an uplink transmit beam for a target uplink RS and / or a target uplink channel. In some cases, the source RS may be an SRS, a synchronization signal block (SSB), and / or a channel state information (CSI) RS (CSI-RS). The target uplink RS or channel may be a PUCCH, SRS, PRACH, and / or PUSCH.

[0110] Fig.10 1 illustrates example operations 1000 for wireless communications by a UE in accordance with certain aspects of the present disclosure. For example, operations 1000 may be performed by Figure 1 Operation 1000 may be implemented as a processor (e.g., Figure 2 In addition, signal transmission and reception by the UE in operation 1000 may be performed by one or more antennas (e.g., Figure 2 In some aspects, the transmission and / or reception of signals by the UE may be achieved by obtaining and / or outputting signals via a bus interface of one or more processors (eg, controller / processor 480).

[0111] Operation 1000 begins at 1002 by receiving an uplink TCI indicating one or more uplink quasi co-location (QCL) types from a plurality of uplink QCL types for one or more source RSs. The uplink TCI may indicate several QCL types from a plurality of uplink QCL types for several source RSs. One of the plurality of uplink QCL types may indicate a spatial relationship between one of the source RSs and an uplink transmission, and one or more of the plurality of uplink QCL types indicates a Doppler shift, an average delay, a Doppler spread, a delay spread, or a combination thereof associated with the one or more source RSs and the uplink transmission.

[0112] In some aspects, the UE may receive the one or more source RSs at 1004. The one or more source RSs may include an SRS, an SSB, a CSI-RS, or a combination thereof.

[0113] In some aspects, the UE may determine one or more parameters for uplink transmission based on the uplink TCI and the one or more source RSs at 1006. The one or more parameters may include a beam, time, frequency, transmit power, or a combination thereof for uplink transmission.

[0114] At 1008, the UE sends an uplink transmission according to the uplink TCI. In some aspects, different types of uplink transmissions may be associated with different sets of uplink QCL types. One or more uplink transmissions may include a PUCCH transmission, a RACH transmission, a PUSCH transmission, or a combination thereof.

[0115] Fig.11 1 illustrates example operations 1100 for wireless communications in accordance with certain aspects of the present disclosure. For example, operations 1100 may be performed by a network entity such as a base station (BS) (e.g., Figure 1 Operation 1100 may be performed by BS 110a (which may be a gNB)) of the present invention. Operation 1100 may be implemented as a processor (e.g., Figure 2 In addition, signal transmission and reception by the BS in operation 1100 may be performed by one or more antennas (e.g., Figure 2 In some aspects, the transmission and / or reception of signals by the BS may be achieved by obtaining and / or outputting signals via a bus interface of one or more processors (eg, controller / processor 240).

[0116] Operation 1100 begins at 1102 by sending an uplink TCI to a UE, the uplink TCI indicating one or more QCL types from a plurality of uplink QCL types for one or more source RSs. The uplink TCI may indicate several QCL types from a plurality of uplink QCL types for several source RSs. One of the plurality of uplink QCL types may indicate a spatial relationship between one of the source RSs and an uplink transmission, and one or more of the plurality of uplink QCL types indicates a Doppler shift, an average delay, a Doppler spread, a delay spread, or a combination thereof associated with the one or more source RSs and the uplink transmission.

[0117] At 1104, the network entity sends at least one of the source RSs to the UE. The one or more source RSs may include an SRS, an SSB, a CSI-RS, or a combination thereof.

[0118] At 1106, the network entity receives an uplink transmission from the UE based on the uplink TCI. In some aspects, different types of uplink transmissions may be associated with different sets of uplink QCL types. The uplink transmission may include a PUCCH transmission, a RACH transmission, a PUSCH transmission, or a combination thereof.

[0119] In some aspects, at 1108, the network entity estimates an uplink time, a frequency offset, or both based on the uplink TCI and the at least one source RS.

[0120] In some systems, each configured uplink TCI state contains only one source RS for uplink transmit beam indication (similar to the QCL type D RS in the downlink TCI state). Therefore, other uplink QCL type RSs for the gNB can be used to estimate the uplink time and / or frequency offset.

[0121] In addition to the source RS for uplink spatial relationship indication, each configured uplink TCI state may also include at least one uplink QCL type RS. For example, the configured uplink TCI state may be used to estimate uplink Doppler and / or delay spread statistics for uplink time / frequency offset compensation. As mentioned, QCL may adopt one or a combination of the following types:

[0122] 'QCL Type A': {Doppler shift, Doppler spread, average delay, delay spread}

[0123] 'QCL Type B': {Doppler shift, Doppler spread}

[0124] 'QCL Type C': {Doppler shift, average delay}

[0125] 'QCL type D': {spatial filter parameters}

[0126] In some aspects, the UE receives timing reference signal (TRS) parameters per SRS resource or per SRS resource set. The corresponding SRS resource may be used as other uplink QCL type RS, including uplink non-spatial relation indication.

[0127] In some aspects, the UE receives a repetition parameter per SRS resource set. Generally, a repetition factor is configured per SRS resource.

[0128] In some aspects, each target uplink RS and / or channel has its own set of different QCL type RS combinations. The target uplink RS and / or channel may include SRS resources or resource sets. These SRS resources or resource sets may be configured with TRS parameters and / or configured to be used as beam management (BM). SRS resources or resource sets may be classified as periodic (P), semi-persistent (SP) and / or aperiodic (AP). In some examples, the target uplink RS and / or channel may include PUCCH, PUSCH and / or PRACH. Each combination of QCL type RS for the target uplink RS and / or channel may include a corresponding uplink QCL type. The corresponding uplink QCL type may be any combination of uplink QCL type A, QCL type B, QCL type C and / or QCL type D. In some cases (e.g., for frequency range 2 (FR2)), the combination may include uplink QCL type D. In some cases (e.g., for frequency range (FR1)), the combination may not include uplink QCL type D.

[0129] Fig.12 The description may include a method configured to perform operations for the techniques disclosed herein (such as Fig.10 1200 includes a communication device 1200 including various components (e.g., corresponding to means-plus-function components) of the operations illustrated in the foregoing. The communication device 1200 includes a processing system 1202 coupled to a transceiver 1208 (e.g., a transmitter and / or a receiver). The transceiver 1208 is configured to transmit and receive signals (such as the various signals described herein) for the communication device 1200 via an antenna 1210. The processing system 1202 may be configured to perform processing functions for the communication device 1200, including processing signals received and / or to be transmitted by the communication device 1200.

[0130] The processing system 1202 includes a processor 1204 coupled to a computer readable medium / memory 1212 via a bus 1206. In some aspects, the computer readable medium / memory 1212 is configured to store a program that, when executed by the processor 1204, causes the processor 1204 to execute Fig.10Instructions (e.g., computer executable code) for performing the operations explained in or other operations of the various techniques for QCL reference signals for uplink TCI states discussed herein. In some aspects, the computer-readable medium / memory 1212 stores code 1214 for receiving an uplink TCI indicating one or more QCL types from a plurality of uplink QCL types for one or more source RSs; and code 1216 for sending an uplink transmission according to the uplink TCI. In some aspects, the computer-readable medium / memory 1212 may store code 1218 for receiving the one or more source RSs; and / or code 1220 for determining one or more parameters for uplink transmission based on the uplink TCI and the one or more source RSs. In some aspects, the processor 1204 has a circuit system configured to implement the code stored in the computer-readable medium / memory 1212. Processor 1204 includes circuitry 1224 for receiving an uplink TCI indicating one or more QCL types from a plurality of uplink QCL types for one or more source RSs; circuitry 1226 for sending an uplink transmission according to the uplink TCI. In certain aspects, processor 1204 may include circuitry 1228 for receiving one or more source RSs; and / or circuitry 1230 for determining one or more parameters for uplink transmission based on the uplink TCI and the one or more source RSs.

[0131] Fig.13 The description may include a method configured to perform operations for the techniques disclosed herein (such as Fig.11 1300 includes a communication device 1300 including various components (e.g., corresponding to means-plus-function components) of the operations illustrated in . The communication device 1300 includes a processing system 1302 coupled to a transceiver 1308 (e.g., a transmitter and / or a receiver). The transceiver 1308 is configured to transmit and receive signals (such as the various signals described herein) for the communication device 1300 via an antenna 1310. The processing system 1302 may be configured to perform processing functions for the communication device 1300, including processing signals received and / or to be transmitted by the communication device 1300.

[0132] The processing system 1302 includes a processor 1304 coupled to a computer readable medium / memory 1312 via a bus 1306. In some aspects, the computer readable medium / memory 1312 is configured to store programs that, when executed by the processor 1304, cause the processor 1304 to execute Fig.11, or instructions (e.g., computer executable code) for performing the operations explained in or other operations of the various techniques for QCL reference signals for uplink TCI states discussed herein. In some aspects, the computer-readable medium / memory 1312 stores code 1314 for sending an uplink TCI to a UE, the uplink TCI indicating one or more QCL types from a plurality of uplink QCL types for one or more source RSs; code 1316 for sending at least one of the source RSs to the UE; and / or code 1318 for receiving an uplink transmission from the UE based on the uplink TCI. In some aspects, the computer-readable medium / memory 1312 may store code for estimating uplink time, frequency offset, or both based on the uplink TCI and the at least one source RS. In some aspects, the processor 1304 has a circuit system configured to implement the code stored in the computer-readable medium / memory 1312. Processor 1304 includes circuitry 1324 for sending an uplink TCI to a UE, the uplink TCI indicating one or more QCL types from a plurality of uplink QCL types for one or more source RSs; circuitry 1326 for sending at least one of the source RSs to the UE; and circuitry 1328 for receiving an uplink transmission from the UE based on the uplink TCI. In certain aspects, processor 1304 may include circuitry 1330 for estimating uplink time, frequency offset, or both based on the uplink TCI and the at least one source RS.

[0133] Example aspects

[0134] In a first aspect, a method for wireless communication by a user equipment (UE) comprises: receiving an uplink transmission configuration indicator (TCI) indicating one or more uplink quasi co-location (QCL) types from a plurality of uplink QCL types for one or more source reference signals (RS); and sending an uplink transmission according to the uplink TCI.

[0135] In a second aspect, in combination with the first aspect, the uplink TCI indicates several uplink QCL types from a plurality of uplink QCL types for several source RSs.

[0136] In a third aspect, in combination with any one of the first aspect and the second aspect, the method further includes receiving the one or more source RSs; and determining one or more parameters for the uplink transmission based on the uplink TCI and the one or more source RSs.

[0137] In a fourth aspect, in combination with the third aspect, the one or more parameters include a beam, time, frequency, transmit power, or a combination thereof, used for the uplink transmission.

[0138] In the fifth aspect, in combination with any one of the first to fourth aspects, one of the multiple uplink QCL types indicates a spatial relationship between one of the source RSs and the uplink transmission; and one or more of the multiple uplink QCL types indicates a Doppler frequency shift, average delay, Doppler spread, delay spread, or a combination thereof associated with the one or more source RSs and the uplink transmission.

[0139] In a sixth aspect, in combination with the fifth aspect, the multiple uplink QCL types include: a first QCL type, which indicates QCL assumptions about Doppler shift, Doppler spread, average delay and delay spread; a second QCL type, which indicates QCL assumptions about Doppler shift and Doppler spread; a third QCL type, which indicates Doppler shift and average delay; and a fourth QCL type, which indicates QCL assumptions about spatial relationships.

[0140] In the seventh aspect, in combination with any one of the first to sixth aspects, the one or more source RSs include a sounding reference signal (SRS), a synchronization signal block (SSB), a channel state information RS (CSI-RS), or a combination thereof; and the uplink transmission includes a physical uplink control channel (PUCCH) transmission, an SRS transmission, a random access channel (RACH) transmission, a physical uplink shared channel (PUSCH) transmission, or a combination thereof.

[0141] In an eighth aspect, in combination with any one of the first to seventh aspects, different types of uplink transmissions are associated with different sets of uplink QCL types.

[0142] In a ninth aspect, in combination with any one of the first to eighth aspects, the method further includes receiving signaling indicating timing reference signal (TRS) information per sounding reference signal (SRS) resource or per SRS resource set for uplink transmission.

[0143] In a tenth aspect, in combination with any one of the first to ninth aspects, the method further comprises receiving signaling indicating a repetition number per sounding reference signal (SRS) resource set for uplink transmission.

[0144] In an eleventh aspect, a method for wireless communication by a network entity comprises: sending an uplink transmission configuration indicator (TCI) to a user equipment (UE), the uplink TCI indicating one or more QCL types from multiple uplink quasi co-location (QCL) types for one or more source reference signals (RS); sending at least one of the source RSs to the UE; and receiving an uplink transmission from the UE based on the uplink TCI.

[0145] In a twelfth aspect, in combination with the eleventh aspect, the method further comprises estimating uplink time, frequency offset, or both based on the uplink TCI and the at least one source RS.

[0146] In a thirteenth aspect, in combination with the eleventh to twelfth aspects, the uplink TCI indicates several QCL types from a plurality of QCL types for several source RSs.

[0147] In the fourteenth aspect, in combination with the eleventh to thirteenth aspects, the method further includes: determining the beam, time, frequency, transmit power, or a combination thereof for the uplink transmission based on at least one of the source RSs and the uplink TCI; and monitoring the uplink transmission based on the determination.

[0148] In the fifteenth aspect, in combination with any one of the eleventh to fourteenth aspects, one of the multiple uplink QCL types indicates a spatial relationship between one of the source RSs and the uplink transmission; and one or more of the multiple uplink QCL types indicates a Doppler shift, average delay, Doppler spread, delay spread, or a combination thereof associated with the one or more source RSs and the uplink transmission.

[0149] In the sixteenth aspect, in combination with any one of the eleventh to fifteenth aspects, the multiple uplink QCL types include: a first QCL type, which indicates QCL assumptions about Doppler shift, Doppler spread, average delay and delay spread; a second QCL type, which indicates QCL assumptions about Doppler shift and Doppler spread; a third QCL type, which indicates Doppler shift and average delay; and a fourth QCL type, which indicates QCL assumptions about spatial relationships.

[0150] In the seventeenth aspect, in combination with any one of the eleventh to sixteenth aspects, the one or more source RSs include a sounding reference signal (SRS), a synchronization signal block (SSB), a channel state information RS (CSI-RS), or a combination thereof; and the uplink transmission includes a physical uplink control channel (PUCCH) transmission, an SRS transmission, a random access channel (RACH) transmission, a physical uplink shared channel (PUSCH) transmission, or a combination thereof.

[0151] In an eighteenth aspect, in combination with any one of the eleventh to seventeenth aspects, different types of uplink transmissions are associated with different sets of uplink QCL types.

[0152] In a nineteenth aspect, in combination with any one of aspects eleven to eighteen, the method further comprises sending signaling indicating timing reference signal (TRS) information per sounding reference signal (SRS) resource or per SRS resource set for uplink transmission to the UE.

[0153] In a twentieth aspect, in combination with any one of the eleventh to nineteenth aspects, the method further comprises sending signaling indicating a repetition number per sounding reference signal (SRS) resource set for uplink transmission to a UE.

[0154] In a twenty-first aspect, in combination with any one of the eleventh to twentieth aspects, each of the one or more RSs is associated with a corresponding QCL type RS set.

[0155] Each method disclosed herein includes one or more steps or actions for implementing the method. These method steps and / or actions can be interchangeable with each other without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and / or use of specific steps and / or actions can be changed without departing from the scope of the claims.

[0156] As used herein, a phrase referring to "at least one of" a list of items refers to any combination of those items, including single members. As an example, "at least one of a, b, or c" is intended to cover: a, b, c, ab, ac, bc, and abc, as well as any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0157] As used herein, the term "determining" encompasses a wide variety of actions. For example, "determining" may include calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, a database, or another data structure), ascertaining, and the like. Also, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), and the like. Also, "determining" may include resolving, selecting, choosing, establishing, and the like.

[0158] The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be easily understood by those skilled in the art, and the universal principles defined herein can be applied to other aspects. Thus, the claims are not intended to be limited to the various aspects shown herein, but should be granted the full scope consistent with the language of the claims, wherein the singular reference to the element is not intended to mean "there is and only one" (unless specifically stated) but "one or more". Unless otherwise specifically stated, the term "some / some" refers to one or more. The elements of the various aspects described throughout this disclosure are all structural and functional equivalents currently or hereafter known to those of ordinary skill in the art and are expressly incorporated herein by reference, and are intended to be covered by the claims. In addition, nothing disclosed herein is intended to be donated to the public, regardless of whether such disclosure is explicitly recorded in the claims. Any element of the claim should not be interpreted under the provisions of 35 U.S.C. § 112 (f), unless the element is explicitly stated using the phrase "device for..." or in the case of a method claim, the element is stated using the phrase "step for...".

[0159] The various operations of the methods described above may be performed by any suitable device capable of performing the corresponding functions. These devices may include various hardware and / or software components and / or modules, including but not limited to circuits, application specific integrated circuits (ASICs), or processors. Generally, where there are operations illustrated in the accompanying drawings, these operations may have corresponding paired device-plus-function components with similar numbers.

[0160] The various illustrative logical blocks, modules, and circuits described in conjunction with the present disclosure may be implemented or executed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0161] If implemented in hardware, an example hardware configuration may include a processing system in a wireless node. The processing system may be implemented using a bus architecture. Depending on the specific application and overall design constraints of the processing system, the bus may include any number of interconnecting buses and bridges. The bus may link together various circuits including a processor, a machine-readable medium, and a bus interface. The bus interface may be used to connect a network adapter, etc., to the processing system via the bus. The network adapter may be used to implement the signal processing functions of the PHY layer. In the user terminal 120 (see Figure 1 ), a user interface (e.g., a keypad, display, mouse, joystick, etc.) may also be connected to the bus. The bus may also link various other circuits, such as timing sources, peripherals, voltage regulators, power management circuits, and the like, which are well known in the art and will not be described further. The processor may be implemented with one or more general and / or special purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuit systems capable of executing software. Those skilled in the art will recognize how to best implement the functionality described with respect to the processing system, depending on the specific application and the overall design constraints imposed on the overall system.

[0162] If implemented in software, each function may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. Software should be broadly interpreted to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or other. Computer-readable media include both computer storage media and communication media, which include any media that facilitate the transfer of computer programs from one place to another. The processor may be responsible for managing the bus and general processing, including executing software modules stored on a machine-readable storage medium. A computer-readable storage medium may be coupled to a processor so that the processor can read and write information from / to the storage medium. In an alternative, a storage medium may be integrated into a processor. As an example, a machine-readable medium may include a transmission line, a carrier modulated by data, and / or a computer-readable storage medium having instructions stored thereon that is separated from a wireless node, all of which may be accessed by a processor through a bus interface. Alternatively or additionally, a machine-readable medium or any part thereof may be integrated into a processor, such as a cache and / or a general register file, which may be the case. As an example, examples of machine-readable storage media may include RAM (random access memory), flash memory, ROM (read only memory), PROM (programmable read only memory), EPROM (erasable programmable read only memory), EEPROM (electrically erasable programmable read only memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage media, or any combination thereof. Machine-readable media may be implemented in a computer program product.

[0163] A software module may include a single instruction, or many instructions, and may be distributed over several different code segments, distributed between different programs, and distributed across multiple storage media. A computer-readable medium may include several software modules. These software modules include instructions that cause a processing system to perform various functions when executed by an apparatus such as a processor. These software modules may include a transmission module and a receiving module. Each software module may reside in a single storage device or may be distributed across multiple storage devices. As an example, when a triggering event occurs, a software module may be loaded into a RAM from a hard drive. During the execution of a software module, a processor may load some instructions into a cache to increase access speed. One or more cache lines may then be loaded into a general register file for execution by the processor. When describing the functionality of a software module as described below, it will be understood that such functionality is implemented by the processor when the processor executes instructions from the software module.

[0164] Likewise, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technology (such as infrared (IR), radio, and microwave), then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technology (such as infrared, radio, and microwave) is included in the definition of medium. Disk and disc, as used herein, include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Disks, where disks often reproduce data magnetically, and discs reproduce data optically with lasers. Thus, in some aspects, computer-readable media may include non-transitory computer-readable media (e.g., tangible media). Additionally, for other aspects, computer-readable media may include transient computer-readable media (e.g., signals). Combinations of the above should also be included within the scope of computer-readable media.

[0165] Thus, some aspects may include a computer program product for performing the operations presented herein. For example, such a computer program product may include a computer-readable medium having instructions stored (and / or encoded) thereon, which instructions can be executed by one or more processors to perform the operations described herein. For example, for performing the operations described herein and in Figure 10-11 Instructions for the operations explained in .

[0166] In addition, it should be appreciated that modules and / or other appropriate means for performing the methods and techniques described herein may be downloaded and / or otherwise obtained by a user terminal and / or base station where applicable. For example, such a device can be coupled to a server to facilitate the transfer of means for performing the methods described herein. Alternatively, the various methods described herein can be provided via a storage device (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or a floppy disk, etc.) so that once the storage device is coupled to or provided to a user terminal and / or base station, the device can obtain the various methods. In addition, any other suitable technology suitable for providing the methods and techniques described herein to a device may be utilized.

[0167] It will be understood that the claims are not limited to the precise configuration and components illustrated above. Various changes, substitutions and variations may be made in the arrangement, operation and details of the methods and apparatus described above without departing from the scope of the claims.

Claims

1. A method for wireless communication by a user equipment (UE), comprising: receiving an uplink transmission configuration indicator (TCI) indicating one or more uplink quasi co-location (QCL) types from a plurality of uplink QCL types for one or more source reference signals (RS); and Uplink transmissions are sent according to the uplink TCI, wherein different types of uplink transmissions are associated with different sets of uplink QCL types such that a first uplink transmission is associated with a first uplink QCL type and a second uplink transmission is associated with a second uplink QCL type.

2. The method of claim 1, wherein the uplink TCI indicates several uplink QCL types from the multiple uplink QCL types for several source RSs.

3. The method of claim 1, further comprising: receiving the one or more source RSs; as well as One or more parameters for the uplink transmission are determined based on the uplink TCI and the one or more source RSs.

4. The method of claim 3, wherein the one or more parameters include a beam, time, frequency, transmit power, or a combination thereof for the uplink transmission.

5. The method of claim 1, wherein: One of the plurality of uplink QCL types indicates a spatial relationship between one of the source RSs and the uplink transmission; and One or more of the plurality of uplink QCL types indicates a Doppler shift, an average delay, a Doppler spread, a delay spread, or a combination thereof associated with the one or more source RSs and the uplink transmission.

6. The method of claim 5, wherein the plurality of uplink QCL types comprises: the first QCL type indicating QCL assumptions regarding Doppler shift, Doppler spread, average delay, and delay spread; the second QCL type indicating a QCL assumption regarding Doppler shift and Doppler spread; a third QCL type indicating a Doppler shift and an average delay; as well as A fourth QCL type indicating a QCL assumption about a spatial relationship.

7. The method of claim 1, wherein: The one or more source RSs include a sounding reference signal (SRS), a synchronization signal block (SSB), a channel state information RS (CSI-RS), or a combination thereof; and The uplink transmission includes a physical uplink control channel (PUCCH) transmission, an SRS transmission, a random access channel (RACH) transmission, a physical uplink shared channel (PUSCH) transmission, or a combination thereof.

8. The method of claim 1, further comprising receiving signaling indicating timing reference signal (TRS) information per sounding reference signal (SRS) resource or per SRS resource set for the uplink transmission.

9. The method of claim 1, further comprising receiving signaling indicating a number of repetitions per sounding reference signal (SRS) resource set for the uplink transmission.

10. A method for wireless communication by a network entity, comprising: transmitting an uplink transmission configuration indicator (TCI), the uplink TCI indicating one or more uplink quasi co-location (QCL) types from a plurality of uplink QCL types for one or more source reference signals (RS); Sending at least one of the source RSs; as well as Uplink transmissions are received according to the uplink TCI, wherein different types of uplink transmissions are associated with different sets of uplink QCL types such that a first uplink transmission is associated with a first uplink QCL type and a second uplink transmission is associated with a second uplink QCL type.

11. The method of claim 10, further comprising estimating uplink time, frequency offset, or both based on the uplink TCI and the at least one source RS.

12. The method of claim 10, wherein the uplink TCI indicates a number of QCL types from the plurality of QCL types for a number of source RSs.

13. The method of claim 10, further comprising: determining a beam, time, frequency, transmit power, or a combination thereof for the uplink transmission based on the at least one of the source RSs and the uplink TCI; as well as The uplink transmission is monitored based on the determination.

14. The method of claim 10, wherein: One of the plurality of uplink QCL types indicates a spatial relationship between one of the source RSs and the uplink transmission; and One or more of the plurality of uplink QCL types indicates a Doppler shift, an average delay, a Doppler spread, a delay spread, or a combination thereof associated with the one or more source RSs and the uplink transmission.

15. The method of claim 10, wherein the plurality of uplink QCL types comprises: the first QCL type indicating QCL assumptions regarding Doppler shift, Doppler spread, average delay, and delay spread; the second QCL type indicating a QCL assumption regarding Doppler shift and Doppler spread; a third QCL type indicating a Doppler shift and an average delay; as well as A fourth QCL type indicating a QCL assumption about a spatial relationship.

16. The method of claim 10, wherein: The one or more source RSs include a sounding reference signal (SRS), a synchronization signal block (SSB), a channel state information RS (CSI-RS), or a combination thereof; and The uplink transmission includes a physical uplink control channel (PUCCH) transmission, an SRS transmission, a random access channel (RACH) transmission, a physical uplink shared channel (PUSCH) transmission, or a combination thereof.

17. The method of claim 10, further comprising sending signaling indicating timing reference signal (TRS) information per sounding reference signal (SRS) resource or per SRS resource set for the uplink transmission.

18. The method of claim 10, further comprising sending signaling indicating a number of repetitions per sounding reference signal (SRS) resource set for the uplink transmission.

19. The method of claim 10, wherein each of the one or more RSs is associated with a corresponding set of QCL type RSs.

20. A wireless communication device, comprising: at least one processor; as well as a memory coupled to the at least one processor, the memory comprising code executable by the at least one processor to cause the apparatus to: receiving an uplink transmission configuration indicator (TCI) indicating one or more uplink quasi co-location (QCL) types from a plurality of uplink QCL types for one or more source reference signals (RS); and Uplink transmissions are sent according to the uplink TCI, wherein different types of uplink transmissions are associated with different sets of uplink QCL types such that a first uplink transmission is associated with a first uplink QCL type and a second uplink transmission is associated with a second uplink QCL type.

21. The apparatus of claim 20, wherein the uplink TCI indicates a number of uplink QCL types from the plurality of uplink QCL types for a number of source RSs.

22. The apparatus of claim 20, wherein the memory further comprises code for causing the apparatus to: receiving the one or more source RSs; and One or more parameters for the uplink transmission are determined based on the uplink TCI and the one or more source RSs.

23. The apparatus of claim 22, wherein the one or more parameters include a beam, time, frequency, transmit power, or a combination thereof for the uplink transmission.

24. The apparatus of claim 20, wherein: One of the plurality of uplink QCL types indicates a spatial relationship between one of the source RSs and the uplink transmission; and One or more of the plurality of uplink QCL types indicates a Doppler shift, an average delay, a Doppler spread, a delay spread, or a combination thereof associated with the one or more source RSs and the uplink transmission.

25. A wireless communication device, comprising: at least one processor; as well as a memory coupled to the at least one processor, the memory comprising code executable by the at least one processor to cause the apparatus to: transmitting an uplink transmission configuration indicator (TCI), the uplink TCI indicating one or more uplink quasi co-location (QCL) types from a plurality of uplink QCL types for one or more source reference signals (RS); Sending at least one of the source RSs; as well as Uplink transmissions are received according to the uplink TCI, wherein different types of uplink transmissions are associated with different sets of uplink QCL types such that a first uplink transmission is associated with a first uplink QCL type and a second uplink transmission is associated with a second uplink QCL type.

26. The apparatus of claim 25, wherein the memory further comprises code for causing the apparatus to: An uplink time, a frequency offset, or both are estimated based on the uplink TCI and the at least one source RS.

27. The apparatus of claim 25, wherein the uplink TCI indicates a number of QCL types from the plurality of QCL types for a number of source RSs.

28. The apparatus of claim 25, wherein the code for causing the apparatus to receive the uplink transmission relates to a beam, time, frequency, transmit power, or a combination thereof determined based on a downlink RS for the uplink transmission.

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