Group common reference signal triggering technology for wireless communication

Abstract

Some aspects described herein relate to receiving, via at least one of a plurality of transmission / reception points (TRPs), group common (GC) downlink control information (DCI) in a first component carrier (CC) from a network, the GC-DCI including a set of blocks intended for one or more UEs, and receiving, at least in part based on the GC-DCI and a subset of the set of blocks intended for a UE, one or more downlink reference signals from among a plurality of downlink reference signals on resources in a second CC, wherein the one or more downlink reference signals are associated with each block of the subset of the set of blocks. Other aspects relate to transmitting the GC-DCI and the one or more downlink reference signals.

Description

[0001] Priority Claim

[0002] This patent application claims priority to Greek Patent Application No. 20200100508, filed on August 24, 2020, entitled "TECHNIQUES FOR GROUP COMMON REFERENCE SIGNAL TRIGGERING IN WIRELESS COMMUNICATIONS", which is assigned to the assignee of the present application and is hereby expressly incorporated by reference in its entirety for all purposes.

[0003] Background

[0004] Aspects of the present disclosure generally relate to wireless communication systems, and more particularly, to transmitting and processing reference signals from multiple transmit / receive points (TRPs).

[0005] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcasting, etc. These systems may be multi-access systems capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multi-access systems include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, and orthogonal frequency division multiple access (OFDMA) systems, as well as single-carrier frequency division multiple access (SC-FDMA) systems.

[0006] These multi-access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at the urban, national, regional, and even global levels. For example, fifth-generation (5G) wireless communication technology (which may be referred to as 5G new radio (5G NR)) is designed to extend and support diverse use cases and applications relative to current mobile network generations. In one aspect, 5G communication technology may include: enhanced mobile broadband for human-centric use cases for accessing multimedia content, services, and data; ultra-reliable low-latency communication (URLLC) with certain specifications regarding latency and reliability; and massive machine type communication, which may allow a very large number of connected devices and the transmission of relatively small amounts of non-latency-sensitive information.

[0007] Some applications include high-speed train (HST) scenarios where the network may use multiple transmit receive points (TRPs) to transmit signals to user equipment (UE) on an HST in a single frequency network (SFN). When the HST passes between coverage areas provided by multiple TRPs, the UE may receive downlink signals and / or transmit uplink signals to different ones of the multiple TRPs in the SFN for communication in the wireless network.

[0008] Overview

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

[0010] According to one aspect, a device for wireless communication is provided. The device includes a transceiver, a memory configured to store instructions, and one or more processors communicatively coupled to the memory and the transceiver. The one or more processors are configured to execute the instructions to cause the device to: receive, in a first component carrier (CC), group common (GC) downlink control information (DCI) including a set of blocks intended for one or more UEs, via at least one of a plurality of transmit receive points (TRPs); and receive, on resources in a second CC, one or more downlink reference signals of a plurality of downlink reference signals, at least in part based on the GC-DCI and a subset of the set of blocks intended for the UE, wherein the one or more downlink reference signals are associated with each block of the subset of the set of blocks.

[0011] According to another aspect, another device for wireless communication is provided. The device includes a transceiver, a memory configured to store instructions, and one or more processors communicatively coupled to the memory and the transceiver. The one or more processors are configured to execute the instructions to cause the device to: transmit a plurality of downlink reference signals to a UE using a plurality of TRPs; transmit, in a first CC, to the UE, via at least one of the plurality of TRPs, GC-DCI including a set of blocks for a group comprising a plurality of UEs, wherein a downlink reference signal of the plurality of downlink reference signals is associated with a given block of the set of blocks; and transmit, in a second CC, one or more of the plurality of downlink reference signals.

[0012] In another aspect, a method for wireless communication by a UE is provided, the method including: receiving, via at least one of a plurality of TRPs in a first CC, a GC-DCI including a set of blocks intended for one or more UEs from a network; and receiving, at least in part based on the GC-DCI and a subset of the set of blocks intended for the UE, one or more downlink reference signals among a plurality of downlink reference signals on resources in a second CC, wherein the one or more downlink reference signals are associated with each block of the subset of the set of blocks.

[0013] In another aspect, a method for wireless communication is provided, the method including: transmitting, using a plurality of TRPs, a plurality of downlink reference signals to a UE; transmitting, via at least one of the plurality of TRPs in a first CC, a GC-DCI including a set of blocks for a group including a plurality of UEs to the UE, wherein a downlink reference signal among the plurality of downlink reference signals is associated with a given block of the set of blocks; and transmitting one or more of the plurality of downlink reference signals in a second CC.

[0014] To achieve the foregoing and related purposes, one or more aspects include the features that are fully described hereinafter and particularly pointed out in the claims. The following description and the drawings set forth in detail certain illustrative features of one or more aspects. However, these features are merely indicative of the various ways in which the principles of various aspects may be employed, and this description is intended to cover all such aspects and their equivalents. Brief Description of the Drawings

[0016] Aspects of the disclosure will hereinafter be described in conjunction with the accompanying drawings, which are provided to illustrate and not to limit the disclosed aspects, where like reference numerals denote like elements and in which:

[0017] Figure 1 illustrates an example of a wireless communication system in accordance with various aspects of the present disclosure;

[0018] Figure 2 is a block diagram illustrating an example of a UE in accordance with various aspects of the present disclosure;

[0019] Figure 3 is a block diagram illustrating an example of a base station in accordance with various aspects of the present disclosure;

[0020] Figure 4 is a flowchart illustrating an example of a method for receiving a group common configuration indicating downlink reference signals in accordance with various aspects of the present disclosure;

[0021] Figure 5 is a flowchart illustrating an example of a method for generating a group common configuration indicating downlink reference signals in accordance with various aspects of the present disclosure; and

[0022] Figure 6 It is a block diagram illustrating an example of a MIMO communication system including a base station and a UE according to various aspects of the present disclosure.

[0023] Detailed description

[0024] Aspects are now described with reference to the accompanying drawings. In the following description, numerous specific details are set forth for purposes of explanation in order to provide a thorough understanding of one or more aspects. It is evident, however, that such aspects may be practiced without these specific details.

[0025] The features described generally relate to determining one or more reference signals to be received from one or more transmission / reception points (TRPs) based on which one or more uplink signals are to be transmitted to the one or more TRPs. A user equipment (UE) communicating in a wireless network may receive multiple reference signals from multiple TRPs in a single frequency network (SFN) during a similar time period. For example, the UE may receive multiple reference signals during a time period similar to the time period during which the TRP may be used to transmit the same or similar communication from the wireless network. For example, in a high-speed train (HST) scenario, a UE on the HST may move in and out of the coverage of individual TRPs and may receive signals from the individual TRPs, which may include receiving multiple signals from multiple TRPs, where the multiple signals may at least partially overlap in time. The signals may include downlink channels such as a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), etc. In one example, multiple quasi co-location (QCL) assumptions (e.g., transmission configuration indicator (TCI) states) may be configured for demodulation reference signals of the PDSCH and the PDCCH. For example, the UE may use the indicated QCL reference signal resources (e.g., channel state information reference signal (CSI-RS) or tracking reference signal (TRS) or synchronization signal block (SSB), etc.) to know or estimate the Doppler frequency shift of each TRP and / or determine the receive (Rx) beam to be used to receive signals from each TRP. The UE may also transmit an uplink signal based on one or more downlink reference signals that are transmitted or modulated.

[0026] In one example, for example, in an HST scenario, nearby UEs may be considered part of a cluster of UEs experiencing channels with similar high Doppler frequency shifts. The Doppler frequency shift experienced by the UE cluster may change "non-uniformly" over time. For example, during the time period when the train passes by the TRP, the rate of change of the Doppler frequency may be at its highest because the train has the highest displacement rate relative to the TRP at this time.

[0027] In one example, the network may transmit group common (GC) downlink control information (DCI) to a set of multiple UEs, where the set of multiple UEs may include multiple such UE clusters. In one example, the GC-DCI may include a set of blocks, where each block may include one or more bits for selecting one downlink reference signal out of multiple configured downlink reference signals for a given UE or UE group. The UE may receive the DCI accordingly and may determine the downlink reference signal configured for the UE or its corresponding UE group. The UE may then receive the downlink reference signal and transmit an uplink signal based on the downlink reference signal. In another example, an aperiodic sounding reference signal (A-SRS) may be indicated for each of the multiple downlink reference signals, and the UE may transmit the A-SRS associated with the downlink reference signal accordingly, e.g., as an uplink signal or otherwise. In one example, the UE may determine the A-SRS based on the same configuration (e.g., where other blocks may be used to indicate the A-SRS associated with the downlink reference signal, or a single block may indicate both the downlink reference signal and the A-SRS). In another example, the UE may determine the A-SRS based on a different configuration received from the network associating the downlink reference signal with the A-SRS, etc.

[0028] In this regard, UEs that are close to each other and thus may experience similar Doppler frequency shifts may use the same downlink reference signal to generate and transmit uplink signals (e.g., SRS). The network may process the received uplink signals to modify subsequent communications with the UEs in the group. For example, the network may use the uplink signals to determine beams for the UEs or for transmitting or receiving with the UEs. In another example, the network may use the uplink signals to pre-compensate subsequent downlink signals for the experienced Doppler frequency shifts. For example, the pre-compensation may be performed by the network based on uplink signals received from the UEs (such as sounding reference signals (SRS)). In any case, configuring a group of UEs to use the same downlink reference signal (or set of downlink reference signals) for transmitting corresponding uplink signaling may allow for more efficient and improved pre-compensation of signals transmitted by the TRP to the UEs based on the proximity of the UEs to the TRP.

[0029] The features described above will be presented in more detail with reference to Figures 1 to 6 below.

[0030] As used in this application, the terms "component", "module", "system" and like terms are intended to include computer-related entities, such as but not limited to hardware, firmware, combinations of hardware and software, software, or software in execution. For example, a component can be but is not limited to a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and / or a computer. By way of illustration, both an application running on a computing device and the computing device can be components. One or more components can reside within a process and / or thread of execution, and a component can be localized on one computer and / or distributed between two or more computers. In addition, these components can execute from various computer-readable media having various data structures stored thereon. The components can communicate by means of local and / or remote processes such as in accordance with signals having one or more data packets, such as data from one component interacting with another component in a local system, a distributed system, and / or across a network such as the Internet with other systems.

[0031] The techniques described herein can be used for various wireless communication systems such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA and other systems. The terms "system" and "network" can generally be used interchangeably. CDMA systems can implement radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), etc. CDMA2000 covers the IS-2000, IS-95 and IS-856 standards. Release 0 and A of IS-2000 are commonly referred to as CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD), etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. TDMA systems can implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA systems can implement radio technologies such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM TMSuch radio technologies. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long-Term Evolution (LTE) and LTE-Advanced (LTE-A) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization called the "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in documents from an organization called the "3rd Generation Partnership Project 2" (3GPP2). The technologies described herein can be used in the systems and radio technologies mentioned above, as well as in other systems and radio technologies, including cellular (e.g., LTE) communications on shared radio frequency bands. However, the following description describes the LTE / LTE-A system for example purposes and uses LTE terminology in most of the following description, but these technologies can also be applied outside of LTE / LTE-A applications (e.g., to a 5th Generation (5G) New Radio (NR) network or other next-generation communication systems).

[0032] The following description provides examples and is not intended to 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 disclosure. Various examples may appropriately omit, substitute, or add various procedures or components. For example, the methods described may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to some examples may be combined in other examples.

[0033] Each aspect or feature will be presented in the form of a system that may include several devices, components, modules, and the like. It should be understood and appreciated that various systems may include additional devices, components, modules, etc., and / or may not include all of the devices, components, modules, etc. discussed in conjunction with the figures. Combinations of these approaches may also be used.

[0034] Figure 1FIG. 0 is a diagram illustrating an example of a wireless communication system 100 and an access network. A wireless communication system (also referred to as a wireless wide area network (WWAN)) may include base stations 102, UEs 104, an evolved packet core (EPC) 160, and / or a 5G core (5GC) 190. The base stations 102 may include macro cells (high-power cellular base stations) and / or small cells (low-power cellular base stations). The macro cells may include base stations. The small cells may include femto cells, pico cells, and micro cells. In one example, the base stations 102 may further include gNBs 180, as further described herein. In one example, in accordance with aspects described herein, some nodes of the wireless communication system may have a modem 240 and a communication component 242 for determining one or more downlink reference signals among a plurality of downlink reference signals based on which to transmit or modulate one or more uplink signals. Additionally, in accordance with aspects described herein, some nodes may have a modem 340 and a configuration component 342 for configuring, in a group sharing configuration, a plurality of downlink reference signals for indicating and transmitting to the UE 104. Although the UE 104 is shown as having a modem 240 and a communication component 242, and the base stations 102 / gNBs 180 are shown as having a modem 340 and a configuration component 342, this is an illustrative example, and substantially any node or node type may include a modem 240 and a communication component 242 and / or a modem 340 and a configuration component 342 for providing the corresponding functionality described herein.

[0035] Base stations 102 configured for 4G LTE (which may be collectively referred to as evolved universal mobile telecommunications system (UMTS) terrestrial radio access network (E-UTRAN)) may interface with the EPC 160 via a backhaul link 132 (e.g., using the S1 interface). Base stations 102 configured for 5G NR (which may be collectively referred to as next generation RAN (NG-RAN)) may interface with the 5GC 190 via a backhaul link 184. In addition to other functions, the base stations 102 may perform one or more of the following functions: transfer of user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment tracing, radio access network information management (RIM), paging, positioning, and delivery of alert messages. The base stations 102 may communicate directly or indirectly (e.g., via the EPC 160 or 5GC 190) with each other over a backhaul link 134 (e.g., using the X2 interface). The backhaul link 134 may be wired or wireless.

[0036] The base station 102 can communicate wirelessly with one or more UEs 104. Each base station 102 can provide communication coverage for its respective geographical coverage area 110. There may be overlapping geographical coverage areas 110. For example, the small cell 102' can have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network including both small cells and macro cells can be referred to as a heterogeneous network. The heterogeneous network can also include a Home evolved Node B (HeNB), which can provide services to a restricted group (which can be referred to as a Closed Subscriber Group (CSG)). The communication link 120 between the base station 102 and the UE 104 can include an uplink (UL) (also referred to as a reverse link) transmission from the UE 104 to the base station 102 and / or a downlink (DL) (also referred to as a forward link) transmission from the base station 102 to the UE 104. The communication link 120 can use multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. These communication links can be over one or more carriers. For each carrier allocated in a carrier aggregation of up to a total of Yx MHz (e.g., for x component carriers) for transmission in the DL and / or UL directions, the base station 102 / UE 104 can use a spectrum with a bandwidth of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400 MHz, etc.). These carriers may or may not be adjacent to each other. The allocation of carriers can be asymmetric with respect to the DL and UL (e.g., more or fewer carriers can be allocated to the DL compared to the UL). The component carriers can include a primary component carrier and one or more secondary component carriers. The primary component carrier can be referred to as the Primary Cell (PCell), and the secondary component carriers can be referred to as the Secondary Cells (SCells).

[0037] In another example, certain UEs 104 can communicate with each other using device-to-device (D2D) communication links 158. The D2D communication links 158 can use the DL / UL WWAN spectrum. The D2D communication links 158 can use one or more sidelink channels, such as the Physical Sidelink Broadcast Channel (PSBCH), the Physical Sidelink Discovery Channel (PSDCH), the Physical Sidelink Shared Channel (PSSCH), and the Physical Sidelink Control Channel (PSCCH). D2D communication can be through various wireless D2D communication systems, such as, by way of example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR.

[0038] ​The wireless communication system may further include a Wi-Fi access point (AP) 150 that communicates with a Wi-Fi station (STA) 152 via a communication link 154 in the 5 GHz unlicensed spectrum. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a Clear Channel Assessment (CCA) before communication to determine whether the channel is available.

[0039] The small cell 102' may operate in licensed and / or unlicensed spectrum. When operating in the unlicensed spectrum, the small cell 102' may adopt NR and use the same 5 GHz unlicensed spectrum as that used by the Wi-Fi AP 150. The small cell 102' adopting NR in the unlicensed spectrum may boost the coverage of the access network and / or increase the capacity of the access network.

[0040] Whether it is the small cell 102' or a large cell (e.g., a macro base station), the base station 102 may include an eNB, a g Node B (gNB), or other types of base stations. Some base stations (such as the gNB 180) may operate in traditional sub-6 GHz spectrum, millimeter wave (mmW) frequencies, and / or near mmW frequencies to communicate with the UE 104. When the gNB 180 operates in mmW or near mmW frequencies, the gNB 180 may be referred to as a mmW base station. The Extremely High Frequency (EHF) is a part of the RF in the electromagnetic spectrum. The EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 millimeter and 10 millimeters. The radio waves in this frequency band may be referred to as millimeter waves. The near mmW may extend down to 3 GHz frequency with a 100 millimeter wavelength. The Super High Frequency (SHF) band extends between 3 GHz and 30 GHz, which is also referred to as centimeter waves. Communications using the mmW / near mmW radio frequency bands have extremely high path loss and short range. The mmW base station 180 may utilize beamforming 182 with the UE 104 to compensate for the extremely high path loss and short range. The base station 102 referred to in this document may include the gNB 180.

[0041] The EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. The MME 162 may communicate with a Home Subscriber Server (HSS) 174. The MME 162 is a control node that processes signaling between the UE 104 and the EPC 160. Generally, the MME 162 provides bearer and connection management. All User Internet Protocol (IP) packets are routed through the Serving Gateway 166, which is itself connected to the PDN Gateway 172. The PDN Gateway 172 provides UE IP address allocation and other functions. The PDN Gateway 172 and the BM-SC 170 are connected to an IP service 176. The IP service 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), a PS streaming service, and / or other IP services. The BM-SC 170 may provide functions for MBMS user service provisioning and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS transmissions, may be used to authorize and initiate MBMS bearer services within a Public Land Mobile Network (PLMN), and may be used to schedule MBMS transmissions. The MBMS Gateway 168 may be used to distribute MBMS traffic to base stations 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area for a particular broadcast service, and may be responsible for session management (start / stop) and for collecting eMBMS-related charging information.

[0042] The 5GC 190 may include an Access and Mobility Management Function (AMF) 192, other AMFs 193, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195. The AMF 192 may communicate with a Unified Data Management (UDM) 196. The AMF 192 may be a control node that processes signaling between the UE 104 and the 5GC 190. Generally, the AMF 192 may provide QoS flow and session management. User Internet Protocol (IP) packets (e.g., from one or more UEs 104) may be routed through the UPF 195. The UPF 195 may provide UE IP address allocation for one or more UEs and other functions. The UPF 195 is connected to an IP service 197. The IP service 197 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), a PS streaming service, and / or other IP services.

[0043] The base station may also be referred to as a gNB, Node B, evolved Node B (eNB), access point, base transceiver station, radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), transmission reception point (TRP), or some other suitable term. The base station 102 provides an access point for the UE 104 to the EPC 160 or 5GC 190. Examples of the UE 104 include cellular phones, smart phones, session initiation protocol (SIP) phones, laptop devices, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablet devices, smart devices, wearable devices, vehicles, electric meters, gas pumps, large or small kitchen appliances, healthcare devices, implants, sensors / actuators, displays, or any other similar functional devices. Some UEs 104 may be referred to as IoT devices (e.g., parking meters, fuel pumps, ovens, vehicles, heart monitors, etc.). IoT UEs may include machine type communication (MTC) / enhanced MTC (eMTC, also referred to as category (CAT)-M, Cat M1) UEs, NB-IoT (also referred to as CAT NB1) UEs, and other types of UEs. In the present disclosure, eMTC and NB-IoT may refer to future technologies that may evolve from or be based on these technologies. For example, eMTC may include FeMTC (further eMTC), eFeMTC (further enhanced eMTC), mMTC (massive MTC), etc., while NB-IoT may include eNB-IoT (enhanced NB-IoT), FeNB-IoT (further enhanced NB-IoT), etc. The UE 104 may also be referred to as a station, mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

[0044] In various aspects of the wireless communication system 100, the base station 102 may also include one or more remotely located TRPs 140, 142, which may be coupled to the base station 102 either wired or wirelessly for transmitting / receiving associated signaling to / from the base station 102 at different locations. The TRPs 140, 142 may operate based on an SFN to transmit signals within the same frequency range. In one example, the TRPs 140, 142 may be remote radio heads (RRHs), repeaters, etc. configured to facilitate communication between one or more UEs or other devices and the base station 102. In another example, the TRPs 140, 142 may include one or more small cells in communication with the core network 160 / 190 to facilitate wireless communication between the core network 160 / 180 and one or more UEs. In a particular example, the TRPs 140, 142 may be located in an HST system to allow UEs 104 on the HST 144 to communicate with the core network 160 / 190 using the TRPs 140 and 142 (e.g., as a RRH or repeater to the base station 102 or others).

[0045] In one example, the communication component 242 may receive multiple RSs from multiple TRPs 140, 142 in an SFN (e.g., at a given point in time or over a similar time period). The communication component 242 may also receive (e.g., from the configuration component 342) a group common configuration from the base station 102 or the multiple TRPs 140, 142, the group common configuration indicating one or more parameters for allowing the UE 104 to determine one or more reference signals (such as SRS, etc.) among the multiple reference signals based on which to transmit an uplink signal. The communication component 242 may receive the reference signal and / or transmit the uplink signal accordingly based on the determined one or more reference signals among the received multiple reference signals. In another example, the group common configuration or another configuration may also indicate one or more parameters for transmitting an uplink signal (e.g., as A-SRS), and the communication component 242 may transmit the uplink signal accordingly based on the one or more parameters

[0046] Now turning to Figures 2 - 6 , aspects are depicted with reference to one or more components and one or more methods that can perform the actions or operations described herein, where the aspects in the dashed lines may be optional. Although the operations described below are presented in a particular order and / or as performed by example components, it should be understood that the order of these actions and the components performing the actions may vary depending on the implementation. Moreover, it should be understood that the following actions, functions, and / or components described may be performed by a specially programmed processor, a processor executing specially programmed software or a computer-readable medium, or any other combination of hardware components and / or software components capable of performing the described actions or functions. Figures 4 to 5 ​

[0047] Reference Figure 2 , an example of the implementation of UE 104 may include various components, some of which have been described above and are further described herein, including components such as one or more processors 212 and memories 216 and transceivers 202 that communicate via one or more buses 244. According to the aspects described herein, it may operate in conjunction with a modem 240 and / or communication component 242 to determine a downlink reference signal among a plurality of downlink reference signals based on which an uplink signal is to be transmitted or modulated. Additionally, UE 104 may communicate with base station 102 via communication link 120 (e.g., to access a network such as EPC 160, 5GC 190, etc.). Additionally, as described, base station 102 may be connected to one or more TRPs (such as TRP 140, 142), which may be RRHs, relays, etc. for forwarding signals transmitted by base station 102 to one or more UEs 104 and / or for forwarding signals transmitted by one or more UEs 104 to base station 102. In one example, base station 102 may provide one or more TRPs 140, 142 to enable communication in an HST scenario.

[0048] In one aspect, one or more processors 212 may include a modem 240 and / or may be part of a modem 240 that uses one or more modem processors. Accordingly, various functions associated with communication component 242 may be included in modem 240 and / or processor 212, and in one aspect, may be performed by a single processor, while in other aspects, different functions among these functions may be performed by a combination of two or more different processors. For example, in one aspect, the one or more processors 212 may include any one or any combination of the following: a modem processor, or a baseband processor, or a digital signal processor, or a transmit processor, or a receive processor, or a transceiver processor associated with transceiver 202. In other aspects, some of the features of one or more processors 212 and / or modem 240 associated with communication component 242 may be performed by transceiver 202.

[0049] In addition, the memory 216 may be configured to store data used herein and / or a local version of the application 275, or the communication component 242 and / or one or more of its sub-components executed by at least one processor 212. The memory 216 may include any type of computer-readable medium that can be used by a computer or at least one processor 212, such as random access memory (RAM), read-only memory (ROM), tape, magnetic disk, optical disk, volatile memory, non-volatile memory, and any combination thereof. In one aspect, for example, when the UE 104 is operating at least one processor 212 to execute the communication component 242 and / or one or more of its sub-components, the memory 216 may be a non-transitory computer-readable storage medium that stores one or more computer-executable codes defining the communication component 242 and / or one or more of its sub-components and / or data associated therewith.

[0050] The transceiver 202 may include at least one receiver 206 and at least one transmitter 208. The receiver 206 may include hardware, firmware, and / or software code executable by a processor, the code including instructions and being stored in a memory (e.g., a computer-readable medium). The receiver 206 may be, for example, a radio frequency (RF) receiver. In one aspect, the receiver 206 may receive signals transmitted by at least one base station 102. Additionally, the receiver 206 may process such received signals and may also obtain measurements of the signals, such as but not limited to Ec / Io, signal-to-noise ratio (SNR), reference signal received power (RSRP), received signal strength indicator (RSSI), etc. The transmitter 208 may include hardware, firmware, and / or software code executable by a processor, the code including instructions and being stored in a memory (e.g., a computer-readable medium). Suitable examples of the transmitter 208 may include but are not limited to RF transmitters.

[0051] Moreover, in one aspect, the UE 104 may include an RF front end 288 that may operate communicatively with one or more antennas 265 and the transceiver 202 for receiving and transmitting radio transmissions, such as wireless communications transmitted by at least one base station 102 or wireless transmissions transmitted by the UE 104. The RF front end 288 may be connected to one or more antennas 265 and may include one or more low noise amplifiers (LNAs) 290, one or more switches 292, one or more power amplifiers (PAs) 298, and one or more filters 296 for transmitting and receiving RF signals.

[0052] In one aspect, the LNA 290 can amplify the received signal to a desired output level. In one aspect, each LNA 290 can have specified minimum and maximum gain values. In one aspect, the RF front end 288 can use one or more switches 292 to select a particular LNA 290 and its specified gain value based on the desired gain value for a particular application.

[0053] In addition, for example, one or more PAs 298 can be used by the RF front end 288 to amplify the signal to obtain an RF output at a desired output power level. In one aspect, each PA 298 can have specified minimum and maximum gain values. In one aspect, the RF front end 288 can use one or more switches 292 to select a particular PA 298 and its specified gain value based on the desired gain value for a particular application.

[0054] Additionally, for example, one or more filters 296 can be used by the RF front end 288 to filter the received signal to obtain an input RF signal. Similarly, in one aspect, for example, the respective filters 296 can be used to filter the output from the respective PAs 298 to produce an output signal for transmission. In one aspect, each filter 296 can be connected to a particular LNA 290 and / or PA 298. In one aspect, the RF front end 288 can use one or more switches 292 to select a transmit or receive path that uses the specified filter 296, LNA 290, and / or PA 298 based on a configuration specified by the transceiver 202 and / or the processor 212.

[0055] Thus, the transceiver 202 can be configured to transmit and receive wireless signals via the RF front end 288 through one or more antennas 265. In one aspect, the transceiver can be tuned to operate at a specified frequency such that the UE 104 can communicate, for example, with one or more base stations 102 or one or more cells associated with one or more base stations 102. In one aspect, for example, the modem 240 can configure the transceiver 202 to operate at a specified frequency and power level based on the UE configuration of the UE 104 and the communication protocol used by the modem 240.

[0056] In one aspect, the modem 240 can be a multi-band - multi-mode modem that can process digital data and communicate with the transceiver 202 to enable the transceiver 202 to transmit and receive digital data. In one aspect, the modem 240 can be multi-band and configured to support multiple frequency bands for a particular communication protocol. In one aspect, the modem 240 can be multi-mode and configured to support multiple operating networks and communication protocols. In one aspect, the modem 240 can control one or more components of the UE 104 (e.g., the RF front end 288, the transceiver 202) to implement the transmission and / or reception of signals from the network based on a specified modem configuration. In one aspect, the modem configuration can be based on the mode of the modem and the frequency band used. In another aspect, the modem configuration can be based on UE configuration information associated with the UE 104, such as provided by the network during cell selection and / or cell reselection.

[0057] In one aspect, according to the aspects described herein, the communication component 242 can optionally include: an RS determination component 252 and / or a GC-DCI processing component 254. The RS determination component 252 is used to determine multiple RS received from multiple TRPs 140, 142, and the GC-DCI processing component 254 is used to process group common configurations (e.g., GC-DCI) to determine one or more reference signals among the multiple reference signals to be received by the UE 104 and / or based on which to transmit uplink signals.

[0058] In one aspect, the (one or more) processors 212 can correspond to one or more of the processors described in connection with the UE in Figure 6 Similarly, the memory 216 can correspond to the memory described in connection with the UE in Figure 6 In one aspect, the (one or more) processors 212 can correspond to one or more of the processors described in connection with the UE in

[0059] Refer to Figure 3 An example implementation of the base station 102 (e.g., the base station 102 and / or the gNB 180, as described above) can include various components, some of which have been described above, but also components such as one or more processors 312 and a memory 316 and a transceiver 302 that are in communication via one or more buses 344. According to the aspects described herein, it can operate in conjunction with a modem 340 and a configuration component 342 to configure multiple downlink reference signals for indication and transmission to the UE 104 in a group common configuration. Additionally, as described, the base station 102 can be connected to one or more TRPs 140, 142, which can be RRHs, relays, etc. for forwarding signals transmitted by the base station 102 to one or more UEs 104 and / or for forwarding signals transmitted by one or more UEs 104 to the base station 102.

[0060] The transceiver 302, receiver 306, transmitter 308, one or more processors 312, memory 316, application 375, bus 344, RF front end 388, LNA 390, switch 392, filter 396, PA 398, and one or more antennas 365 may be the same as or similar to the corresponding components of the UE 104 described above, but are configured or otherwise programmed for base station operation rather than UE operation.

[0061] In one aspect, according to the aspects described herein, the configuration component 342 may optionally include: a GC-DCI component 352 and / or an uplink signal processing component 354. The GC-DCI component 352 is used to generate group common configurations (e.g., GC-DCI) for multiple UEs to indicate one or more downlink reference signals among multiple downlink reference signals that a UE can use to transmit uplink signals to the base station 102 and / or one or more TRPs 140, 142. The uplink signal processing component 354 is used to process one or more uplink signals received from the UE 104 based on which one of the multiple RSs transmitted or modulated the uplink signal.

[0062] In one aspect, the (one or more) processors 312 may correspond to one or more of the processors described in connection with the base station in Figure 6 . Similarly, the memory 316 may correspond to the memory described in connection with the base station in Figure 6 .

[0063] Aspects described herein may relate to functionality defined in 5G NR, such as the configuration and transmission of uplink SRS. For example, a UE may transmit sounding reference signals (SRS) based on a configuration from the network (e.g., received via one or more TRPs). For example, in 5G NR, an SRS resource set may include SRS resource sets on which SRS can be transmitted by a UE. For example, an SRS resource (or more generally, a resource) may correspond to a set of resource blocks (RBs), where these RBs may be defined in frequency over a period of time. For example, an RB may include several subcarriers (e.g., 12 frequency subcarriers) within a period of time (such as a symbol (e.g., an orthogonal frequency division multiplexing (OFDM) symbol, a single carrier frequency division multiplexing (SC-FDM) symbol, etc.)). In another example, an SRS resource may include multiple resource blocks or other frequency and / or time partitions, which may be indicated over a larger period of time (such as a time slot of multiple symbols, multiple time slots, etc.).

[0064] In an example in 5G NR, an SRS resource set can be configured for transmitting aperiodic SRS (e.g., signaled in downlink control information (DCI)), semi-persistent SRS, periodic SRS, etc. For example, a UE can be configured to have multiple resource sets for transmitting SRS, and these resource sets can be grouped in the SRS resource set depending on the usage scenario. For example, an SRS resource set can be configured separately for each of antenna switching, codebook-based, non-codebook-based, beam management, etc. For A-SRS transmission, 2 bits in the downlink (DL) or uplink (UL) DCI can be used to trigger the transmission of an SRS resource set. Each A-SRS resource set can be labeled with 1, 2, or 3 corresponding to code points 01, 10, 11. DCI code point 00 can indicate no A-SRS transmission. Each A-SRS set can be configured in radio resource control (RRC), and the A-SRS set can include an indication of the RBs on which SRS A-SRS is to be transmitted and / or one or more other time-related parameters (such as a "slot offset" from 0…32), where the slot offset can correspond to the offset in terms of the number of slots between the triggering DCI and the actual transmission of the SRS resource set. If this field does not exist, the UE may not apply an offset (value 0). Once an SRS resource set is selected by DCI, the slot offset can be fixed. The UE can determine the resources for transmitting A-SRS based on the code point specified in the DCI and the mapping between the code point and the resource information specified in the RRC signaling.

[0065] In 5G NR, a DCI format (such as DCI 2_3) can be used to transmit a transmission power control (TPC) command group for one or more UEs for SRS transmission of one or more UEs. Along with the TPC command, an SRS request can also be transmitted. The content of DCI format 2_3 can include multiple blocks: block 1, block 2, … block B. For type A, the UE is configured to have one block that applies the CC set and includes an SRS request (0, 2 bits) for determining the CC set, and N TPC commands for each CC in the set. For type B, the UE is configured to have one or more blocks, where each block applies to one UL carrier and includes an SRS request (0, 2 bits) for determining the SRS resource set and a TPC command (2 bits). A similar concept can be used to configure multiple downlink reference signals, as described herein. For example, this can include using DCI format 2_3 to indicate an SRS resource set that can be associated with a TRS resource set in another configuration. In another example, the DCI 2_3 format can be extended to indicate a TRS resource set or an associated code point (e.g., as another parameter). In yet another example, a similar concept of the DCI 2_3 format can be used to provide a similar block for defining a TRS resource set, as further described herein.

[0066] In one example, 2 bits in the DL or UL DCI can be used to trigger A-SRS. For example, each A-SRS set can be labeled 1, 2, or 3, and each A-SRS set can be configured in the RRC with a "slot offset" from 0...32, as described. Each SRS resource in the set has an associated symbol index ("starting position") of the first symbol containing the SRS resource, and the SRS resource can span multiple consecutive OFDM symbols. Various DCI formats can have various parameters and mechanisms for triggering A-SRS, as defined in 5G NR for DCI formats 0_1, 1_1, and 2_3 (e.g., as defined in Sections 7.3.1.1.2, 7.3.1.2.2, and 7.3.1.3.4 of the 3rd Generation Partnership Project (3GPP) Technical Specification (TS) 38.212).

[0067] Figure 4 A flowchart illustrating an example of method 400 for determining one or more downlink reference signals among a plurality of downlink reference signals based on which one or more uplink signals are to be transmitted, in accordance with aspects described herein. In one example, UE 104 can use Figure 1 and 2 one or more components described in

[0068] In method 400, at block 402, a GC-DCI including a set of blocks intended for one or more UEs can be received from the network in a first CC via at least one of a plurality of TRPs. In one aspect, a GC-DCI processing component 254 (e.g., in combination with (one or more of) processors 212, memory 216, transceiver 202, communication component 242, etc.) can receive and / or process a GC-DCI including a set of blocks intended for one or more UEs from the network (e.g., from base station 102 or a network component) in a first CC via at least one of a plurality of TRPs. For example, the GC-DCI can include a set of blocks, which can include a configuration of only A-TRS (e.g., each block in the set corresponds to A-TRS), or a configuration of both A-TRS and A-SRS (e.g., each block in the set includes A-TRS or a corresponding A-SRS, or each block includes A-TRS and a corresponding A-SRS, etc.), as further described herein. Various formats can be used to indicate the blocks and / or related information, as further described herein. Additionally, as described in one example, the DCI format 2_3 defined in 5G NR or a similar mechanism can indicate a set of blocks where each block can have or correspond to an A-TRS configuration and / or an A-SRS configuration.

[0069] In method 400, at block 404, one or more downlink reference signals for reception in a second CC may be received based at least in part on the GC-DCI and a subset of the set of blocks intended for the UE. In one aspect, the RS determination component 252 (e.g., in combination with processors 212, memory 216, transceiver 202, communication component 242, etc.) may determine one or more downlink reference signals for reception in a second CC based at least in part on the GC-DCI and a subset of the set of blocks intended for the UE. In one example, the one or more downlink reference signals may include downlink reference signals based on which the UE 104 is to transmit one or more uplink SRSs in a third CC.

[0070] In one example, as part of receiving one or more downlink reference signals at block 404, optionally at block 406, a subset of the set of blocks intended for the UE may be determined. In one aspect, the GC-DCI processing component 254 (e.g., in combination with processors 212, memory 216, transceiver 202, communication component 242, etc.) may determine a subset of the set of blocks intended for the UE. For example, the GC-DCI processing component 254 may determine a subset of the set of blocks associated with at least one of a group identifier of a group of which the UE is a part, an associated UE identifier, etc. In one example, the UE 104 may be configured to have a specific radio network temporary identifier (RNTI) that the UE 104 may use to descramble the GC-DCI intended for the UE 104. The UE 104 may be configured to have a pointer indicating which block of the GC-DCI is intended for this UE 104.

[0071] For example, as described above, the RS determination component 252 (e.g., via the communication component 242) may receive multiple downlink reference signals transmitted by the network via multiple TRPs. For example, each TRP may configure the transmission of reference signals to the UE 104, which transmission may be via radio resource control (RRC) configuration, media access control (MAC) control element (CE), broadcast system information, etc. In one example, each TRP may configure CSI-RS transmission, TRS transmission, SSB transmission, etc. The RS determination component 252 may receive configurations from the multiple TRPs and may accordingly determine the resources (e.g., time and / or frequency resources) from which it is to receive downlink reference signals from the TRPs. In one example, the TRPs may transmit the same or similar or different downlink reference signals (e.g., in the same or similar or different times and / or frequencies). The UE 104 may be configured to receive downlink reference signals from the multiple TRPs. In one aspect, the base station 102 or other network components may control the TRPs (e.g., TRP 140, 142) to transmit downlink reference signals and / or transmit corresponding downlink reference signal configurations.

[0072] In a specific example, the TRP may configure a periodic TRS (P-TRS), and the P-TRS may include a CSI-RS resource set configured for tracking in the RRC with a semi-statically configured TCI state. The QCL source of the P-TRS may be an SSB of type C / D, an SSB of type C, or a CSI-RS for beam management (BM) of type D. In another specific example, the TRP may configure an aperiodic TRS (A-TRS) associated with the P-TRS. In this example, the TRP may use a DCI-triggered CSI-RS resource set for tracking, which may be initially configured in the RRC with a configured TCI state. In this example, the TCI state to be used may be triggered by a DCI indicating one or more RRC-configured TCI states. The QCL source of the A-TRS may be another P-TRS of type A / D. In one example, the determination of the QCL source may be defined as in Section 5.1.5 of 3GPP TS 38.214. Additionally, for example, the A-TRS may be triggered as a QCL source type C / D in a UL DCI with a different associated SSB (or CSI-RS for BM). In this example, each of the multiple code points in the DCI may point to an A-TRS trigger state, which indicates a CSI report index, a non-zero power CSI-RS resource set on which to measure the CSI-RS, and QCL information of the SSB, and the UL DCI may indicate the CSI report index to be used to determine the QCL source.

[0073] In one example, where, for example, the GC-DCI received as at block 402 includes only an A-TRS trigger, the GC-DCI may include a set of blocks, where each block may be received by multiple UEs. Each block may contain one or more bits that select one A-TRS for the UE among the configured A-TRSs (e.g., as configured in the RRC signaling). In this example, the GC-DCI processing component 254 may determine, and / or the RS determination component 252 may receive a subset of the set of blocks corresponding to the UE for receiving the corresponding one or more downlink reference signals indicated for the subset of the set of blocks.

[0074] In another example, where the GC-DCI includes A-SRS and A-TRS triggers, separate code points in each block can be used to indicate A-SRS and A-TRS. For example, the GC-DCI can include a first code point (e.g., 2 bits) for indicating A-SRS and a second code point (e.g., another 2 bits of the first code point and / or 2 bits subsequent or prior thereto) for indicating A-TRS. In a specific example, the SRS blocks can be indicated as followed by corresponding TRS blocks, followed by the next SRS block, etc., such that the SRS blocks and TRS blocks are interleaved in the set of blocks indicated in the GC-DCI. In this example, the GC-DCI processing component 254 can determine which code points and / or associated blocks correspond to the UE 104, which can include, for example, determining the SRS block and the next TRS block in bit order, or determining the TRS block and the previous SRS block, etc. In another specific example, multiple (e.g., all) SRS blocks can be indicated in a first set of consecutive blocks, and multiple (e.g., all) TRS blocks can be indicated in a second set of consecutive blocks after the first set of consecutive blocks in the set of blocks. In this example, the GC-DCI processing component 254 can determine which code points and / or associated blocks correspond to the UE 104, which can include determining SRS blocks and TRS blocks having similar indices (e.g., similar offsets from the starting code point) between respective TRS blocks as SRS blocks between respective SRS blocks. In any case, the RS determination component 252 can receive a downlink reference signal (e.g., TRS) based on the configured TRS resources corresponding to the code points indicated in the block (e.g., as defined in a configuration that maps code points to TRS resources).

[0075] In another example, where the GC-DCI includes A-SRS and A-TRS triggers, a combined code point can be used to trigger A-SRS and A-TRS. In this example, the code point of each block can indicate A-SRS and A-TRS, and the GC-DCI processing component 254 can determine the code point applied to the UE 104 and can accordingly determine the A-SRS and A-TRS indicated by the code point. For example, one block having X bits can trigger both SRS and A-TRS. In this example, the RS determination component 252 can determine the A-TRS resources corresponding to the code point indicated in the block (e.g., based on a separate configuration that maps code points to resource indications of A-TRS as described), and can receive a downlink reference signal on the determined resources. In another example, as further described herein, the RS determination component 252 can similarly determine the A-SRS resources corresponding to the code point indicated in the block and can transmit SRS on the A-SRS resources.

[0076] In yet another example, the GC-DCI may include an A-SRS trigger, and the association between the A-SRS and the A-TRS may be provided in a separate configuration (e.g., RRC signaling, MAC-CE, or system information broadcast received from the network). In this example, optionally, at block 410, a configuration indicating the association between the downlink reference signal and the SRS may be received (e.g., from the base station 102 or a network component). In this example, a single A-SRS configuration may be provided (e.g., as in DCI format 2-3), which may be associated with the A-TRS (by RRC, MAC-CE, system information, or other configuration), such that the UE 104 may trigger A-TRS reception and A-SRS transmission. In this example, one block triggers the A-SRS, which subsequently causes the A-TRS to be triggered (e.g., based on the configuration received at block 410). In this example, the RS determination component 252 may receive the downlink reference signal (e.g., the determined A-TRS). Additionally, in this example, the A-SRS trigger may be used by legacy UEs without determining the corresponding A-TRS configuration. Additionally, in this example, the GC-DCI may reuse the SRS request bits defined in DCI format 2_3 to indicate the A-SRS and select the SRS resource set for the UE 104.

[0077] In addition, the first CC, the second CC, and the third CC may all be the same CC, such that the reference signal, the GC-DCI, and the ULSRS are all transmitted on the same CC. In other examples, one or more of the first CC, the second CC, and / or the third CC may be different.

[0078] Additionally, as described above and by way of example, the RS determination component 252 (e.g., via the communication component 242) may receive one or more downlink reference signals determined based on the GC-DCI. For example, the RS determination component 252 may determine the resources (e.g., time and / or frequency resources) on which one or more downlink reference signals are transmitted, determine that these resources are based on the GC-DCI indication of the downlink reference signal(s) for the UE (e.g., the identifier(s) of the downlink reference signal(s)), information about the downlink reference signal received in another configuration (e.g., associating the identifier with the resource), etc. The RS determination component 252 may accordingly receive the one or more downlink reference signals on the determined resources.

[0079] In method 400, optionally, at block 414, one or more uplink SRSs may be transmitted to the network for each block in a subset of blocks and based on one or more downlink reference signals. In one aspect, communication component 242 (e.g., in combination with processors 212, memory 216, transceiver 202, etc.) may transmit the one or more uplink SRSs to the network for each block in the subset of the set of blocks and based on one or more downlink reference signals. For example, communication component 242 may transmit A-SRSs that are determined to correspond to the one or more downlink reference signals (e.g., one or more A-TRSs). For example, the A-SRSs may be determined in a separate configuration that associates the A-TRSs to the A-SRSs, as shown in the GC-DCI, as described. In one example, communication component 242 may determine the resources (e.g., time and / or frequency resources) defined for the A-SRSs, which may be defined in a separate configuration based on the identifiers of the A-SRSs. In this example, the GC-DCI may indicate the identifier of the A-SRS for UE 104, and communication component 242 may determine the resources and / or other parameters for transmitting the A-SRS based on the identifier.

[0080] In one example of method 400, optionally at block 416, a timing offset between receiving one or more downlink reference signals and transmitting one or more uplink SRSs may be determined. In one aspect, RS determination component 252 (e.g., in combination with processors 212, memory 216, transceiver 202, communication component 242, etc.) may determine the timing offset between receiving one or more downlink reference signals and transmitting one or more uplink SRSs. For example, the network may configure the timing offset (e.g., via base station 102 and / or one or more TRPs 140, 142). In one example, when the A-SRS and A-TRS are triggered, a separate slot offset may be configured for each UL and DL signal, or the same slot offset may be used. A minimum gap between the A-TRS and A-SRS may be configured or specified. How much time the UE needs after receiving the A-TRS to transmit the A-SRS may be the UE's ability to use the Doppler shift derived from the A-TRS. In this example, communication component 242 may indicate this ability to base station 102 or a network component. In one example, the A-TRS may be received first, and the A-SRS may be configured later. The A-SRS offset may be defined relative to its associated A-TRS such that RS determination component 252 may determine the offset for transmitting the A-SRS based on the offset and the time of receiving the A-TRS.

[0081] Figure 5A flowchart illustrating an example of method 500 for indicating one or more downlink reference signals to be used in transmitting one or more uplink signals among a plurality of downlink reference signals according to various aspects described herein is presented. In one example, a base station 102 or other network component that can communicate with a plurality of TRPs (e.g., TRP 140, 142) may use Figure 1 and 3 one or more components described therein to perform the functions described in method 500.

[0082] In method 500, at block 502, a plurality of downlink reference signals may be transmitted to a UE using a plurality of TRPs. In one aspect, a configuration component 342 (e.g., in combination with processors 312, memory 316, transceiver 302, etc.) may use a plurality of TRPs (e.g., TRP 140, 142) to transmit a plurality of downlink reference signals to a UE (e.g., UE 104). For example, the configuration component 342 may cause TRP 140, 142 to transmit downlink reference signals that may include CSI-RS, TRS, SSB, etc. Additionally, for example, the configuration component 342 may configure the UE to receive downlink reference signals based on one or more parameters transmitted via RRC signaling, system information broadcast, etc. in the configuration. For example, the configuration component 342 may transmit, via each TRP 140, 142 for example, a configuration indicating the QCL assumption (e.g., TCI state) of each TRP for DMRS for PDSCH and PDCCH, such that UE 104 may use the indicated QCL reference signal source (e.g., CSI-RS, TRS, SSB, etc.) to know and / or estimate the Doppler shift of each TRP and / or the corresponding Rx beam for receiving the reference signal.

[0083] In method 500, at block 504, a GC-DCI including a set of blocks intended for one or more UEs may be transmitted to a UE in a first CC via at least one of the plurality of TRPs. In one aspect, a GC-DCI component 352 (e.g., in combination with processors 312, memory 316, transceiver 302, configuration component 342, etc.) may transmit a GC-DCI including a set of blocks intended for one or more UEs to a UE in a first CC via at least one of the plurality of TRPs. For example, as described, the GC-DCI may generate a GC_DCI to indicate an A-TRS configured for a UE group or indicate at least one of an A-SRS corresponding to the A-TRS. For example, the GC-DCI component 352 may generate a GC-DCI to indicate a block for each code point in the DCI, where each block may indicate only the A-TRS, or may indicate an alternating set of A-TRS and A-SRS, or may first indicate multiple (e.g., all) A-SRSs and then indicate multiple (e.g., all) A-TRSs, etc., as described above. In yet another example, each code point may correspond to a block indicating both an A-SRS and an associated A-TRS (e.g., where the block may be RRC-configured to indicate A-SRS and A-TRS resources). Additionally, in one example, the GC-DCI component 352 may scramble the GC-DCI using a specific RNTI configured for UE 104, and UE 104 may use the specific RNTI to descramble the GC-DCI intended for UE 104. Successful descrambling of the GC-DCI may indicate that the GC-DCI is intended for UE 104. The configuration component 342 may also configure UE 104 with a pointer indicating which block of the GC-DCI is intended for UE 104.

[0084] In another example, optionally, at block 506, a configuration indicating an association between a downlink reference signal and an SRS may be transmitted. In one aspect, a configuration component 342 (e.g., in combination with processors 312, memory 316, transceiver 302, etc.) may transmit a configuration indicating an association between a downlink reference signal and an SRS. In this example, the GC-DCI component 352 may generate a GC-DCI to indicate an A-SRS, and the configuration may be used (e.g., by UE 104) to determine an A-TRS associated with the A-SRS. Additionally, as described, the configuration may be transmitted via RRC signaling, MAC-CE, system information, etc.

[0085] In method 500, at block 508, one or more downlink reference signals among a plurality of downlink reference signals may be transmitted in a second CC. In one aspect, configuration component 342 (e.g., in conjunction with processors 312, memory 316, transceiver 302, etc.) may transmit one or more downlink reference signals among the plurality of downlink reference signals in the second CC. For example, configuration component 342 may transmit the one or more downlink reference signals among the plurality of downlink reference signals based on determining time and / or frequency resources on which to transmit the one or more downlink reference signals. For example, this may include determining resources as indicated in another configuration that associates an index of the downlink reference signal with the resources. In one example, this may be a configuration transmitted to UE 104 to configure possible A-TRS for transmission thereto, possible A-SRS for reception therefrom, etc. Additionally, for example, the configuration may identify A-TRS and / or A-SRS configurations, associate the identified configurations with code points, etc. Additionally, configuration component 342 may transmit the downlink reference signal via one or more of TRPs 140, 142.

[0086] In method 500, optionally, at block 510, one or more uplink SRSs may be received from a UE on a third CC for a given block in a set of blocks and based on a downlink reference signal associated with the given block in the set of blocks. In one aspect, configuration component 342 (e.g., in conjunction with processors 312, memory 316, transceiver 302, etc.) may receive one or more uplink SRSs from a UE on a third CC for a given block in a set of blocks and based on a downlink reference signal associated with the given block in the set of blocks. For example, as described above, the one or more uplink SRSs may be associated with one or more downlink reference signals in a GC-DCI and / or other configuration.

[0087] Additionally, in one example, optionally at block 512, an indication of a timing offset between receiving one or more downlink reference signals and transmitting one or more uplink SRSs may be transmitted to the UE. In one aspect, configuration determination component 342 (e.g., in conjunction with processors 312, memory 316, transceiver 302, etc.) may transmit an indication of a timing offset between receiving one or more downlink reference signals and transmitting one or more uplink SRSs to the UE. For example, configuration component 342 may indicate the timing offset in another configuration (e.g., RRC, system information, etc.). Additionally, for example, configuration component 342 may receive one or more uplink SRSs based on the timing offset from transmitting the associated downlink reference signal.

[0088] In method 500, optionally, at block 514, one or more uplink SRSs may be processed based on one or more indicated downlink reference signals. In one aspect, the uplink signal processing component 354 (e.g., in conjunction with processors 312, memory 316, transceiver 302, configuration component 342, etc.) may process one or more uplink SRSs based on one or more indicated downlink reference signals. For example, the uplink signal processing component 354 may determine one or more downlink reference signals associated with the transmitted one or more uplink SRSs, and thus may determine one or more parameters for subsequent transmissions based on this information (e.g., based on the measured signal parameters of one or more uplink SRSs and / or based on the known parameters of one or more indicated downlink reference signals).

[0089] When processing the uplink signal at block 514, optionally, at block 516, subsequent downlink signals transmitted to the UE may be pre-compensated based on one or more uplink SRSs to account for Doppler shift. In one aspect, the uplink signal processing component 354 (e.g., in conjunction with processors 312, memory 316, transceiver 302, configuration component 342, etc.) may process the uplink signal to pre-compensate subsequent downlink signals transmitted to the UE based on one or more uplink SRSs to account for Doppler shift. In one example, the uplink signal processing component 354 may determine the Doppler shift associated with one or more uplink SRSs, and may also pre-compensate the signal at the appropriate TRP based on one or more downlink reference signals to account for Doppler shift.

[0090] In another example of processing the uplink signal at block 514, optionally, at block 518, a beam may be selected based on at least one of one or more uplink SRSs or one or more downlink reference signals. In one aspect, the uplink signal processing component 354 (e.g., in conjunction with processors 312, memory 316, transceiver 302, configuration component 342, etc.) may select a beam based on at least one of one or more uplink SRSs or one or more downlink reference signals. For example, the uplink signal processing component 354 may process one or more uplink SRSs to determine and / or indicate a receive beam or a transmit beam corresponding to the selected one or more downlink reference signals, the QCL type of one or more downlink reference signals, etc.

[0091] Figure 6 is a block diagram of a MIMO communication system 600 that includes a base station 102 and a UE 104. The MIMO communication system 600 may illustrate in connection with reference to Figure 1Aspects of the radio access network described for the radio communication system 100. The base station 102 can be an example of aspects of the base station 102 described with reference to Figure 1 The base station 102 can be equipped with antennas 634 and 635, and the UE 104 can be equipped with antennas 652 and 653. In the MIMO communication system 600, the base station 102 can be capable of transmitting data simultaneously on multiple communication links. Each communication link can be referred to as a "layer", and the "rank" of the communication link can indicate the number of layers used for communication. For example, in a 2x2 MIMO communication system where the base station 102 transmits two "layers", the rank of the communication link between the base station 102 and the UE 104 is 2.

[0092] At the base station 102, the transmit (Tx) processor 620 can receive data from a data source. The transmit processor 620 can process the data. The transmit processor 620 can also generate control symbols or reference symbols. The transmit MIMO processor 630 can perform spatial processing (e.g., precoding) on the data symbols, control symbols, or reference symbols if applicable, and can provide the output symbol streams to the transmit modulator / demodulators 632 and 633. Each modulator / demodulator 632 to 633 can process its respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator / demodulator 632 to 633 can further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a DL signal. In one example, the DL signals from the modulator / demodulators 632 and 633 can be transmitted via antennas 634 and 635, respectively.

[0093] The UE 104 can be an example of aspects of the UE 104 described with reference to Figures 1 - 2 At the UE 104, the UE antennas 652 and 653 can receive the DL signals from the base station 102 and can provide the received signals to the modulator / demodulators 654 and 655, respectively. Each modulator / demodulator 654 to 655 can condition (e.g., filter, amplify, down-convert, and digitize) its respective received signal to obtain input samples. Each modulator / demodulator 654 to 655 can further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. The MIMO detector 656 can obtain the received symbols from the modulator / demodulators 654 and 655, perform MIMO detection on these received symbols if applicable, and provide detected symbols. The receive (Rx) processor 658 can process (e.g., demodulate, de-interleave, and decode) the detected symbols, provide the decoded data for the UE 104 to the data output, and provide the decoded control information to the processor 680 or the memory 682.

[0094] In some cases, the processor 680 may execute the stored instructions to instantiate the communication component 242 (see, e.g., Figure 1 and 2 ).

[0095] On the uplink (UL), at the UE 104, the transmit processor 664 may receive and process data from a data source. The transmit processor 664 may also generate reference symbols of a reference signal. The symbols from the transmit processor 664 may be precoded by the transmit MIMO processor 666 if applicable, further processed by the modulators / demodulators 654 and 655 (e.g., for SC-FDMA, etc.), and transmitted to the base station 102 according to the communication parameters received from the base station 102. At the base station 102, the UL signal from the UE 104 may be received by the antennas 634 and 635, processed by the modulators / demodulators 632 and 633, detected by the MIMO detector 636 if applicable, and further processed by the receive processor 638. The receive processor 638 may provide the decoded data to the data output and the processor 640 or the memory 642.

[0096] In some cases, the processor 640 may execute the stored instructions to instantiate the configuration component 342 (see, e.g., Figure 1 and 3 ).

[0097] The components of the UE 104 may be individually or collectively implemented by one or more ASICs adapted to perform some or all of the applicable functions in hardware. Each of the mentioned modules may be a device for performing one or more functions related to the operation of the MIMO communication system 600. Similarly, the components of the base station 102 may be individually or collectively implemented by one or more application specific integrated circuits (ASICs) adapted to perform some or all of the applicable functions in hardware. Each of the mentioned components may be a device for performing one or more functions related to the operation of the MIMO communication system 600.

[0098] The following aspects are merely illustrative, and aspects thereof may be combined with aspects of other embodiments or teachings described herein without limitation.

[0099] Aspect 1 is a method for wireless communication by a UE, the method comprising: determining a plurality of downlink reference signals transmitted by a network via a plurality of TRPs; receiving, in a first CC via at least one of the plurality of TRPs from the network, a GC-DCI comprising a set of blocks intended for one or more UEs; determining a subset of the set of blocks intended for the UE; determining, at least in part based on the GC-DCI and the subset of the set of blocks, one or more downlink reference signals among the plurality of downlink reference signals for use in receiving in a second CC based on which to transmit one or more uplink SRSs in a third CC, the one or more downlink reference signals being associated with each block in the subset of the set of blocks, and receiving the one or more downlink reference signals for each block in the subset of the set of blocks.

[0100] In aspect 2, the method of aspect 1 comprises, wherein at least a first portion of the subset of the set of blocks each indicates one downlink reference signal among the plurality of downlink reference signals based on which to transmit an associated uplink SRS, and wherein transmitting one or more uplink SRSs comprises determining one or more uplink SRSs associated with the one or more downlink reference signals indicated for a given block.

[0101] In aspect 3, the method of aspect 2 comprises, wherein a second portion of the subset of the set of blocks each indicates one uplink SRS among the plurality of uplink SRSs to be transmitted for a corresponding downlink reference signal in the first portion of the subset of the set of blocks, and wherein transmitting one or more uplink SRSs comprises determining one or more uplink SRSs from one block determined to be associated with a given block in the first portion of the subset of the set of blocks among the second portion of the subset of the set of blocks.

[0102] In aspect 4, the method of aspect 3 comprises the first portion of the subset of the set of blocks and the second portion of the subset of the set of blocks being interleaved in the set of blocks.

[0103] In aspect 5, the method of either aspect 3 or 4 comprises, wherein the second portion of the subset of the set of blocks comprises a first consecutive portion of the subset of the set of blocks, and wherein the second portion of the subset of the set of blocks comprises a second consecutive portion of the subset of the set of blocks after the first consecutive portion.

[0104] In aspect 6, the method of any one of aspects 1 to 5 includes, wherein a subset of the set of blocks each indicates one downlink reference signal among a plurality of downlink reference signals and one uplink SRS to be transmitted for the one downlink reference signal among the plurality of downlink reference signals, and wherein transmitting the one or more uplink SRSs includes determining the one uplink SRS among the plurality of uplink SRSs from a given block indicated in the subset of the set of blocks as being associated with the one or more downlink reference signals.

[0105] In aspect 7, the method of any one of aspects 1 to 6 includes, wherein the subset of the set of blocks each indicates one SRS to be transmitted among a plurality of SRSs, and receiving from the network an indication of a configuration of a plurality of downlink reference signals associated with the plurality of SRSs, and wherein determining the one or more downlink reference signals is at least partially based on determining the one or more downlink reference signals associated with one SRS indicated for a given block among the plurality of SRSs in the configuration.

[0106] In aspect 8, the method of aspect 7 includes wherein receiving the configuration includes receiving the configuration in RRC signaling or MAC-CE.

[0107] In aspect 9, the method of any one of aspects 7 or 8 includes wherein one SRS to be transmitted among the plurality of SRSs is indicated in the SRS request field of each block in the set of blocks.

[0108] In aspect 10, the method of any one of aspects 1 to 9 includes determining a timing offset between receiving the one or more downlink reference signals and transmitting the one or more uplink SRSs, wherein transmitting the one or more uplink SRSs is based on the timing offset.

[0109] In aspect 11, the method of aspect 10 includes determining that the timing offset is based on receiving an indication of the timing offset from the network.

[0110] In aspect 12, the method of aspect 11 includes wherein the timing offset is relative to receiving the one or more downlink reference signals.

[0111] In aspect 13, the method of any one of aspects 10 to 12 includes wherein determining the timing offset is based on transmitting an indication of the ability related to the timing offset to the network.

[0112] In aspect 14, the method of any one of aspects 1 to 13 includes wherein the first CC, the second CC, and the third CC are different CCs.

[0113] In aspect 15, the method of any one of aspects 1 to 14 includes wherein the first CC, the second CC, and the third CC are the same CC.

[0114] In aspect 16, the method of any one of aspects 1 to 15 includes where a GC-DCI triggers transmission of one or more uplink SRSs.

[0115] In aspect 17, the method of any one of aspects 1 to 16 includes transmitting, for each block in a subset of a set of blocks and based on one or more downlink reference signals, one or more uplink SRSs to a network.

[0116] Aspect 18 is a method for wireless communication, the method including: transmitting, using a plurality of TRPs, a plurality of downlink reference signals to a UE; transmitting, via at least one of the plurality of TRPs, in a first CC, a GC-DCI including a set of blocks for a group of a plurality of UEs, where a downlink reference signal among the plurality of downlink reference signals is associated with a given block in the set of blocks; transmitting, in a second CC, one or more of the plurality of downlink reference signals; and receiving, from the UE on a third CC and based on the downlink reference signal associated with the given block in the set of blocks, one or more uplink SRSs for the given block in the set of blocks.

[0117] In aspect 19, the method of aspect 18 includes, where at least a first portion of a subset of the set of blocks intended for the UE each indicates one of the plurality of downlink reference signals based on which a related uplink SRS is to be transmitted, and where receiving one or more uplink SRSs includes receiving one or more uplink SRSs associated with the downlink reference signal indicated for the given block.

[0118] In aspect 20, the method of aspect 19 includes, where a second portion of a subset of the set of blocks intended for the UE each indicates one of the plurality of uplink SRSs to be transmitted for a corresponding downlink reference signal in a first subset of the set of blocks, and where receiving one or more uplink SRSs includes receiving one or more uplink SRSs from a block indicated as being associated with a given block in the first subset of the set of blocks in a second subset of the set of blocks.

[0119] In aspect 21, the method of aspect 20 includes that a first portion of a subset of the set of blocks and a second portion of a subset of the set of blocks are interleaved in the subset of the set of blocks.

[0120] In aspect 22, the method of any one of aspects 20 to 21 includes, where the second portion of a subset of the set of blocks includes a first consecutive portion of the subset of the set of blocks, and where the second portion of a subset of the set of blocks includes a second consecutive portion of the subset of the set of blocks after the first consecutive portion.

[0121] In aspect 23, the method of any one of aspects 18 to 22 includes, wherein each set of blocks indicates one downlink reference signal among a plurality of downlink reference signals and one uplink SRS for transmission in response to the one downlink reference signal among the plurality of downlink reference signals, and wherein receiving one or more uplink SRSs includes receiving the one uplink SRS among the plurality of uplink SRSs from a given block indicated in the set of blocks as being associated with the downlink reference signal.

[0122] In aspect 24, the method of any one of aspects 18 to 23 includes, wherein each set of blocks indicates one SRS to be transmitted and transmits to the UE a configuration indicating a plurality of downlink reference signals associated with the plurality of SRSs, and wherein receiving the downlink reference signals includes receiving the downlink reference signals associated with the one SRS indicated for a given block in the configuration among the plurality of SRSs.

[0123] In aspect 25, the method of aspect 24 includes wherein transmitting the configuration includes transmitting the configuration in RRC signaling or MAC-CE.

[0124] In aspect 26, the method of aspect 25 includes wherein the one SRS to be transmitted among the plurality of SRSs is indicated in the SRS request field of each block in the set of blocks.

[0125] In aspect 27, the method of any one of aspects 18 to 26 includes transmitting to the UE an indication of a timing offset applied between receiving the downlink reference signals and transmitting one or more uplink SRSs.

[0126] In aspect 28, the method of aspect 27 includes wherein the timing offset is relative to receiving the downlink reference signals.

[0127] In aspect 29, the method of any one of aspects 27 or 28 includes determining the timing offset based on receiving from the UE an indication of an ability related to the timing offset.

[0128] In aspect 30, the method of any one of aspects 18 to 29 includes wherein the first CC, the second CC, and the third CC are different CCs.

[0129] In aspect 31, the method of any one of aspects 18 to 30 includes wherein the first CC, the second CC, and the third CC are the same CC.

[0130] In aspect 32, the method of any one of aspects 18 to 31 includes wherein a GC-DCI triggers the transmission of one or more uplink SRSs.

[0131] Aspect 33 is a method for wireless communication by a UE, the method comprising: receiving, via at least one of a plurality of TRPs, in a first CC, a GC-DCI from a network, the GC-DCI comprising a set of blocks intended for one or more UEs; and receiving, at least in part based on the GC-DCI and a subset of the set of blocks intended for the UE, one or more downlink reference signals from among a plurality of downlink reference signals on resources in a second CC, wherein the one or more downlink reference signals are associated with each block of the subset of the set of blocks.

[0132] In aspect 34, the method of aspect 33 comprises, wherein at least a first portion of the subset of the set of blocks each indicates one of the plurality of downlink reference signals based on which an associated uplink SRS is to be transmitted, and transmitting, for each uplink reference signal of the plurality of uplink reference signals indicated in the subset of the set of blocks, an associated uplink SRS on a third CC.

[0133] In aspect 35, the method of aspect 34 comprises, wherein a second portion of the subset of the set of blocks each indicates one of the plurality of uplink SRSs to be transmitted for a corresponding downlink reference signal in the first portion of the subset of the set of blocks, and transmitting the plurality of uplink SRs on a third CC.

[0134] In aspect 36, the method of aspect 35 comprises the first portion of the subset of the set of blocks and the second portion of the subset of the set of blocks being interleaved in the set of blocks.

[0135] In aspect 37, the method of either aspect 34 or 35 comprises, wherein the second portion of the subset of the set of blocks comprises a first consecutive portion of the subset of the set of blocks, and wherein the second portion of the subset of the set of blocks comprises a second consecutive portion of the subset of the set of blocks that is after the first consecutive portion.

[0136] In aspect 38, the method of any one of aspects 33 to 37 comprises, wherein each block in the subset of the set of blocks indicates one of the plurality of downlink reference signals and one of the plurality of downlink SRSs to be transmitted for one of the plurality of downlink reference signals, and transmitting, in a third CC, one of the plurality of uplink SRSs indicated for each block in the subset of the set of blocks.

[0137] In aspect 39, the method of any one of aspects 33 to 38 includes, wherein each block in a subset of the block set indicates one SRS to be transmitted among a plurality of SRSs, and receiving from the network an indication of a configuration of a plurality of downlink reference signals associated with the plurality of SRSs, and determining one or more downlink reference signals based at least in part on determining one or more downlink reference signals associated with one SRS indicated by a given block among the plurality of SRSs in the configuration.

[0138] In aspect 40, the method of aspect 39 includes wherein receiving the configuration includes receiving the configuration in RRC signaling or MAC-CE.

[0139] In aspect 41, the method of any one of aspects 39 or 40 includes wherein one SRS to be transmitted among the plurality of SRSs is indicated in an SRS request field of each block in the block set.

[0140] In aspect 42, the method of any one of aspects 33 to 41 includes determining a timing offset between receiving one or more downlink reference signals and transmitting one or more uplink SRSs, and transmitting one or more uplink SRSs based on the timing offset.

[0141] In aspect 43, the method of aspect 42 includes wherein determining the timing offset is based on receiving an indication of the timing offset from the network.

[0142] In aspect 44, the method of aspect 43 includes wherein the timing offset is relative to receiving one or more downlink reference signals.

[0143] In aspect 45, the method of any one of aspects 42 or 43 includes wherein determining the timing offset is based on transmitting an indication of an ability related to the timing offset to the network.

[0144] In aspect 46, the method of any one of aspects 33 to 45 includes wherein at least a first CC and a second CC are different CCs.

[0145] In aspect 47, the method of any one of aspects 33 to 46 includes transmitting one or more SRSs on a third CC based on one or more downlink reference signals, wherein the first CC, the second CC, and the third CC are the same CC.

[0146] In aspect 48, the method of any one of aspects 33 to 47 includes wherein a GC-DCI triggers the transmission of one or more uplink SRSs.

[0147] In aspect 49, the method of any one of aspects 33 to 48 includes transmitting, for each block in a subset of the block set and based on one or more downlink reference signals, the one or more uplink SRSs to the network.

[0148] Aspect 50 is a method for wireless communication, the method comprising: transmitting a plurality of downlink reference signals to a UE using a plurality of TRPs; transmitting, via at least one of the plurality of TRPs, a GC-DCI including a set of blocks for a group comprising a plurality of UEs in a first CC, wherein a downlink reference signal among the plurality of downlink reference signals is associated with a given block in the set of blocks; and transmitting one or more of the plurality of downlink reference signals in a second CC.

[0149] In aspect 51, the method of aspect 50 includes, wherein at least a first part of a subset of the set of blocks intended for the UE each indicates one of the plurality of downlink reference signals based on which an associated uplink SRS is to be transmitted, and receiving, on a third CC, an associated uplink SRS for each of the plurality of uplink reference signals indicated in the subset of the set of blocks.

[0150] In aspect 52, the method of aspect 51 includes, wherein a second part of a subset of the set of blocks intended for the UE each indicates one of the plurality of uplink SRSs to be transmitted for a corresponding downlink reference signal in a first subset of the set of blocks, and receiving a plurality of uplink SRs on a third CC.

[0151] In aspect 53, the method of aspect 52 includes that a first part of a subset of the set of blocks and a second part of a subset of the set of blocks are interleaved in the subset of the set of blocks.

[0152] In aspect 54, the method of either aspect 52 or 53 includes, wherein the second part of a subset of the set of blocks includes a first consecutive part of a subset of the set of blocks, and wherein the second part of a subset of the set of blocks includes a second consecutive part of a subset of the set of blocks after the first consecutive part.

[0153] In aspect 55, the method of any one of aspects 50 to 54 includes, wherein each block in the set of blocks indicates one of the plurality of downlink reference signals and one of the plurality of uplink SRSs to be transmitted for the one downlink reference signal among the plurality of downlink reference signals, and receiving, in a third CC, one of the plurality of uplink SRSs indicated for each block in the set of blocks.

[0154] In aspect 56, the method of any one of aspects 50 to 55 includes, wherein each block in the set of blocks indicates one SRS to be transmitted among a plurality of SRSs; transmitting to the UE a configuration indicating a plurality of downlink reference signals associated with the plurality of SRSs, and receiving the downlink reference signals includes receiving the downlink reference signals associated with one SRS indicated for a given block in the configuration among the plurality of SRSs.

[0155] In aspect 57, the method of aspect 56 includes wherein transmitting the configuration includes transmitting the configuration in RRC signaling or MAC-CE.

[0156] In aspect 58, the method of aspect 57 includes wherein one SRS to be transmitted among the plurality of SRSs is indicated in the SRS request field of each block in the set of blocks.

[0157] In aspect 59, the method of any one of aspects 50 to 58 includes transmitting to the UE an indication of a timing offset applied between receiving the downlink reference signals and transmitting one or more uplink SRSs.

[0158] In aspect 60, the method of aspect 59 includes wherein the timing offset is relative to receiving the downlink reference signals.

[0159] In aspect 61, the method of any one of aspects 59 or 60 includes determining the timing offset based on receiving from the UE an indication of an ability related to the timing offset.

[0160] In aspect 62, the method of any one of aspects 50 to 61 includes wherein at least a first CC and a second CC are different CCs.

[0161] In aspect 63, the method of any one of aspects 50 to 62 includes receiving one or more SRSs on a third CC based on one or more downlink reference signals, wherein the first CC, the second CC, and the third CC are the same CC.

[0162] In aspect 64, the method of any one of aspects 50 to 63 includes wherein GC-DCI triggers the transmission of one or more uplink SRSs.

[0163] Aspect 65 is a device for wireless communication, which includes a transceiver, a memory configured to store instructions, and one or more processors communicatively coupled to the memory and the transceiver, wherein the one or more processors are configured to execute one or more methods of any one of aspects 1 to 64.

[0164] Aspect 66 is a device for wireless communication, including means for executing one or more methods of any one of aspects 1 to 64.

[0165] Aspect 67 is a computer-readable medium including code executable by one or more processors for wireless communication, the code including code for performing one or more methods of any of Aspects 1 through 64.

[0166] The foregoing detailed description, which has been presented in conjunction with the accompanying drawings, describes examples and not the only examples that may be implemented or that fall within the scope of the claims. The term "example" as used in this description means "serving as an example, instance, or illustration" and does not mean "superior to" or "better than other examples". This detailed description includes specific details to provide an understanding of the described technologies. However, the technologies may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0167] Information and signals may be represented using any of a variety of different arts and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, computer-executable code or instructions stored on a computer-readable medium, or any combination thereof.

[0168] The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a special-purpose programmed device, such as, but not limited to, a processor, a digital signal processor (DSP), an ASIC, a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A special-purpose programmed processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A special-purpose programmed processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0169] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored on or transmitted via a non-transitory computer-readable medium as one or more instructions or code. Other examples and implementations fall within the scope and spirit of the present disclosure and the appended claims. For example, due to the nature of software, the above-described functions can be implemented using software, hardware, firmware, hardwiring, or any combination thereof executed by a specially programmed processor. The features implementing the functions can also be physically located in various positions, including being distributed such that portions of the functions are implemented at different physical locations. Also, as used herein (including in the claims), the "or" in a list of items prefaced by "at least one of" indicates a disjunctive list such that, for example, the list "at least one of A, B, or C" means A or B or C or AB or AC or BC or ABC (i.e., A and B and C).

[0170] Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. The storage media can be any available media that can be accessed by a general purpose or special purpose computer. By way of example and not limitation, computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a general purpose or special purpose computer, or a general purpose or special purpose processor. Likewise, any connection is properly termed a computer-readable medium. For example, if software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of the medium. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray disc, where disk often magnetically reproduces data, while disc optically reproduces data with lasers. Combinations of the above media are also included within the scope of computer-readable media.

[0171] The foregoing description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. In addition, although the elements of the described aspects and / or embodiments may be described or claimed in the singular, the plural is also contemplated unless explicitly stated to be limited to the singular. Additionally, all or part of any aspect and / or embodiment may be combined with all or part of any other aspect and / or embodiment, unless otherwise stated. Thus, the disclosure is not limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for wireless communication, comprising: a transceiver; a memory configured to store instructions; and one or more processors communicatively coupled to the memory and the transceiver, wherein the one or more processors are configured to execute the instructions to cause the device to: receive, from a network, in a first component carrier (CC), group common (GC)-downlink control information (DCI) including a set of blocks intended for one or more UEs, via at least one of a plurality of transmit / receive points (TRPs); and receive, on resources in a second CC, one or more downlink reference signals of a plurality of downlink reference signals, at least in part based on the GC-DCI and a subset of the set of blocks intended for the UE, wherein the one or more downlink reference signals are associated with each block of the subset of the set of blocks.

2. The device of claim 1, wherein at least a first portion of the subset of the set of blocks each indicates one of the plurality of downlink reference signals based on which a corresponding uplink sounding reference signal (SRS) is to be transmitted, and wherein the one or more processors are further configured to execute the instructions to cause the device to: transmit, for each of the one or more downlink reference signals indicated in the subset of the set of blocks, the corresponding uplink SRS on a third CC.

3. The device of claim 2, wherein a second portion of the subset of the set of blocks each indicates one of a plurality of uplink SRSs to be transmitted for a corresponding downlink reference signal in the first portion of the subset of the set of blocks, and wherein the one or more processors are further configured to execute the instructions to cause the device to transmit the plurality of uplink SRSs on a third CC.

4. The device of claim 3, wherein the first portion of the subset of the set of blocks and the second portion of the subset of the set of blocks are interleaved in the set of blocks.

5. The device of claim 3, wherein the second portion of the subset of the set of blocks includes a first consecutive portion of the subset of the set of blocks, and wherein the second portion of the subset of the set of blocks includes a second consecutive portion of the subset of the set of blocks that is after the first consecutive portion.

6. The device of claim 1, wherein each block in the subset of the set of blocks indicates one of the plurality of downlink reference signals and one of a plurality of uplink sounding reference signals (SRSs) to be transmitted for the one of the plurality of downlink reference signals, and wherein the one or more processors are further configured to execute the instructions to cause the device to: transmit, on a third CC, the one of the plurality of uplink SRSs indicated for each block in the subset of the set of blocks.

7. The apparatus of claim 1, wherein each block in the subset of the set of blocks indicates one sounding reference signal (SRS) to be transmitted among a plurality of SRSs, and wherein the one or more processors are further configured to execute the instructions to cause the apparatus to: receive, from the network, a configuration indicating the plurality of downlink reference signals associated with the plurality of SRSs; and determine the one or more downlink reference signals based at least in part on determining the one or more downlink reference signals associated with the one SRS indicated for a given block among the plurality of SRSs in the configuration.

8. The apparatus of claim 7, wherein the one or more processors are configured to execute the instructions to cause the apparatus to receive the configuration in radio resource control (RRC) signaling or a media access control (MAC) control element (CE).

9. The apparatus of claim 7, wherein one SRS to be transmitted among the plurality of SRSs is indicated in an SRS request field of each block in the set of blocks.

10. The apparatus of claim 1, wherein the one or more processors are further configured to execute the instructions to cause the apparatus to: determine a timing offset between receiving the one or more downlink reference signals and transmitting one or more uplink sounding reference signals (SRSs); and transmit the one or more uplink SRSs based on the timing offset.

11. The apparatus of claim 10, wherein the one or more processors are configured to execute the instructions to cause the apparatus to determine the timing offset based on receiving an indication of the timing offset from the network.

12. The apparatus of claim 11, wherein the timing offset is relative to receiving the one or more downlink reference signals.

13. The apparatus of claim 10, wherein the one or more processors are configured to execute the instructions to cause the apparatus to determine the timing offset based on transmitting an indication of the ability associated with the timing offset to the network.

14. The apparatus of claim 1, wherein at least the first CC and the second CC are different CCs.

15. The apparatus of claim 1, wherein the one or more processors are further configured to execute the instructions to cause the apparatus to: transmit one or more sounding reference signals (SRSs) on a third CC based on the one or more downlink reference signals, wherein the first CC, the second CC, and the third CC are the same CC.

16. The apparatus of claim 1, wherein the GC-DCI triggers transmission of one or more uplink sounding reference signals (SRSs).

17. The apparatus of claim 1, wherein the one or more processors are further configured to execute the instructions to cause the apparatus to: transmit one or more uplink sounding reference signals (SRSs) to the network for each block in the subset of the set of blocks and based on the one or more downlink reference signals.

18. An apparatus for wireless communication, comprising: A transceiver; A memory configured to store instructions; And One or more processors communicatively coupled to the memory and the transceiver, wherein the one or more processors are configured to execute the instructions to cause the device to: Transmit a plurality of downlink reference signals to a user equipment (UE) using a plurality of transmission / reception points (TRP); Transmit, via at least one of the plurality of TRP, group common (GC)-downlink control information (DCI) including a set of blocks for a group of a plurality of UEs in a first component carrier (CC), wherein a downlink reference signal among the plurality of downlink reference signals is associated with a given block in the set of blocks; And Transmit one or more of the plurality of downlink reference signals in a second CC.

19. The device according to claim 18, wherein at least a first portion of a subset of the set of blocks intended for the UE each indicates a downlink reference signal among the plurality of downlink reference signals based on which a related uplink sounding reference signal (SRS) is to be transmitted, and wherein the one or more processors are further configured to execute the instructions to cause the device to: receive the related uplink SRS on a third CC for each of the downlink reference signals indicated in the subset of the set of blocks.

20. The device according to claim 19, wherein a second portion of the subset of the set of blocks intended for the UE each indicates an uplink SRS among a plurality of uplink SRSs to be transmitted for a corresponding downlink reference signal in the first portion of the subset of the set of blocks, and wherein the one or more processors are further configured to execute the instructions to cause the device to receive the plurality of uplink SRSs on a third CC.

21. The device according to claim 20, wherein the first portion of the subset of the set of blocks and the second portion of the subset of the set of blocks are interleaved in the subset of the set of blocks.

22. The device according to claim 20, wherein the second portion of the subset of the set of blocks includes a first consecutive portion of the subset of the set of blocks, and wherein the second portion of the subset of the set of blocks includes a second consecutive portion of the subset of the set of blocks after the first consecutive portion.

23. The device according to claim 18, wherein each block in the set of blocks indicates a downlink reference signal among the plurality of downlink reference signals and an uplink SRS among a plurality of uplink sounding reference signals (SRS) to be transmitted for the one downlink reference signal among the plurality of downlink reference signals, and wherein the one or more processors are further configured to execute the instructions to cause the device to: receive, in a third CC, the one downlink SRS indicated for each block in the set of blocks among the plurality of uplink SRSs.

24. The apparatus of claim 18, wherein each block in the set of blocks indicates one sounding reference signal (SRS) to be transmitted among a plurality of SRSs, and wherein the one or more processors are further configured to execute the instructions to cause the apparatus to: transmit to the UE a configuration indicating the plurality of downlink reference signals associated with the plurality of SRSs; and receive the downlink reference signals, including receiving the downlink reference signals associated with the one SRS indicated for the given block among the plurality of SRSs in the configuration.

25. The apparatus according to claim 18, further comprising: transmit to the UE an indication of a timing offset to be applied between receiving the downlink reference signals and transmitting one or more uplink sounding reference signals (SRSs).

26. The apparatus of claim 18, wherein at least the first CC and the second CC are different CCs.

27. The apparatus according to claim 18, further comprising: receive one or more sounding reference signals (SRSs) on a third CC based on the one or more downlink reference signals, wherein the first CC, the second CC, and the third CC are the same CC.

28. A method for wireless communication by a user equipment (UE), comprising: receiving, from a network, in a first component carrier (CC), via at least one of a plurality of transmit / receive points (TRPs), a set of block group common (GC)-downlink control information (DCI) intended for one or more UEs; and receiving, on resources in a second CC, one or more downlink reference signals among a plurality of downlink reference signals, at least partially based on the GC-DCI and a subset of the set of blocks intended for the UE, wherein the one or more downlink reference signals are associated with each block in the subset of the set of blocks.

29. The method of claim 28, wherein at least a first portion of the subset of the set of blocks each indicates one downlink reference signal among the plurality of downlink reference signals based on which an associated uplink sounding reference signal (SRS) is to be transmitted, and the method further comprises transmitting, on a third CC, the associated uplink SRS for each downlink reference signal among the plurality of downlink reference signals indicated by the subset of the set of blocks.

30. A method for wireless communication, comprising: transmitting, using a plurality of transmit / receive points (TRPs), a plurality of downlink reference signals to a user equipment (UE); transmitting, via at least one of the plurality of TRPs, in a first component carrier (CC), to the UE a group common (GC)-downlink control information (DCI) for a set of blocks for a group of a plurality of UEs, wherein a downlink reference signal among the plurality of downlink reference signals is associated with a given block in the set of blocks; and transmitting, in a second CC, one or more downlink reference signals among the plurality of downlink reference signals.

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