Signaling sequence for uplink repeated sounding reference signal resource indicator set

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user device may receive at least one SRS resource set configuration for multiple sounding reference signal (SRS) resources, the SRS resources corresponding to corresponding SRS ports on which SRS is to be sent; use the SRS resources to send SRS; receive downlink control information identifying a sequence of SRS resource indicators (SRI) sets, wherein the SRI set identifies one or more SRS resources in the SRS resources for sending SRS; and send multiple repetitions of uplink communications based at least in part on the sequence of the SRI set, wherein the repetitions are sent using one or more uplink ports corresponding to one or more SRS ports, the one or more SRS ports being associated with one or more SRS resources identified at least in part based on the SRI set. Numerous other aspects are provided.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to Greek Patent Application No. 20190100351, filed on August 13, 2019, entitled “SIGNALING SEQUENCES OF SOUNDING REFERENCE SIGNAL RESOURCE INDICATOR COLLECTIONS FOR UPLINK REPETITIONS” and U.S. Non-Provisional Patent Application No. 16 / 939,888, filed on July 27, 2020, entitled “SIGNALING SEQUENCES OF SOUNDING REFERENCE SIGNAL RESOURCE INDICATOR COLLECTIONS FOR UPLINK REPETITIONS”, and these two applications are expressly incorporated herein by reference. Technical Field

[0003]

[0004] Generally speaking, aspects of the disclosure relate to wireless communications and to techniques and apparatus for signaling sequences of uplink repeated sounding reference signal (SRS) resource indicator (SRI) collections. Background Art

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

[0005] A wireless communication network may include multiple base stations (BSs) that may support communications for multiple user equipments (UEs). User equipments (UEs) may communicate with base stations (BSs) via downlinks and uplinks. A downlink (or forward link) refers to a communication link from a BS to a UE, and an uplink (or reverse link) refers to a communication link from a UE to a BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, access point (AP), radio head, transmit receive point (TRP), new radio (NR) BS, 5G Node B, etc.

[0006] The above multiple access technologies have been adopted by various telecommunication standards to provide a common protocol that enables different user equipment to communicate at the municipal, national, regional and even global levels. New Radio (NR) (which may also be referred to as 5G) is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). NR is designed to be better integrated with other open standards by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink (DL), using CP-OFDM and / or SC-FDM (e.g., also referred to as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), and supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation to better support mobile broadband network access. However, as the requirements for mobile broadband access continue to increase, there is a need for further improvements in LTE and NR technologies. Better, these improvements should be applicable to other multiple access technologies and telecommunication standards that adopt these technologies. Summary of the invention

[0007] In some aspects, a method of wireless communication performed by a UE may include: receiving at least one SRS resource set configuration for multiple SRS resources, the SRS resources corresponding to corresponding SRS ports on which SRS is to be sent; using the SRS resources to send SRS; receiving downlink control information identifying a sequence of SRI sets, wherein the SRI set identifies one or more SRS resources in the SRS resources for sending SRS; and sending multiple repetitions of uplink communications based at least in part on the sequence of the SRI set, wherein the repetitions are sent using one or more uplink ports corresponding to one or more SRS ports, and the one or more SRS ports are associated with the one or more SRS resources identified at least in part based on the SRI set.

[0008] In some aspects, a method of wireless communication performed by a base station may include: sending at least one SRS resource set configuration for multiple SRS resources; receiving SRS in the SRS resources; determining a sequence of multiple repeated SRI sets to be used by a UE to send uplink communications, wherein the SRI set identifies one or more SRS resources in the SRS resources for receiving the SRS; and sending downlink control information identifying the sequence of the SRI sets to the UE.

[0009] In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: receive at least one SRS resource set configuration for a plurality of SRS resources, the SRS resources corresponding to respective SRS ports on which SRS is to be transmitted; transmit SRS using the SRS resources; receive downlink control information identifying a sequence of SRI sets, wherein the SRI set identifies one or more SRS resources in the SRS resources for transmitting SRS; and transmit multiple repetitions of uplink communications based at least in part on the sequence of the SRI set, wherein the repetitions are transmitted using one or more uplink ports corresponding to one or more SRS ports associated with the one or more SRS resources identified at least in part based on the SRI set.

[0010] In some aspects, a base station for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: send at least one SRS resource set configuration for multiple SRS resources; receive SRS in the SRS resources; determine a sequence of multiple repeated SRI sets to be used by a UE to send uplink communications, wherein the SRI set identifies one or more SRS resources in the SRS resources for receiving the SRS; and send downlink control information identifying the sequence of the SRI sets to the UE.

[0011] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to perform the following operations: receiving at least one SRS resource set configuration for a plurality of SRS resources, the SRS resources corresponding to respective SRS ports on which SRS is to be transmitted; using the SRS resources to transmit SRS; receiving downlink control information identifying a sequence of SRI sets, wherein the SRI set identifies one or more SRS resources in the SRS resources for transmitting SRS; and transmitting a plurality of repetitions of uplink communications based at least in part on the sequence of the SRI set, wherein the repetitions are transmitted using one or more uplink ports corresponding to one or more SRS ports associated with the one or more SRS resources identified at least in part based on the SRI set.

[0012] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a base station, the one or more instructions may cause the one or more processors to perform the following operations: sending at least one SRS resource set configuration for multiple SRS resources; receiving SRS in the SRS resources; determining a sequence of multiple repeated SRI sets to be used by a UE to send uplink communications, wherein the SRI set identifies one or more SRS resources in the SRS resources for receiving the SRS; and sending downlink control information identifying the sequence of the SRI sets to the UE.

[0013] In some aspects, an apparatus for wireless communication may include: a unit for receiving at least one SRS resource set configuration for multiple SRS resources, the SRS resources corresponding to corresponding SRS ports on which SRS is to be sent; a unit for sending SRS using the SRS resources; a unit for receiving downlink control information identifying a sequence of SRI sets, wherein the SRI set identifies one or more SRS resources in the SRS resources for sending SRS; and a unit for sending multiple repetitions of uplink communications based at least in part on the sequence of the SRI set, wherein the repetitions are sent using one or more uplink ports corresponding to one or more SRS ports, and the one or more SRS ports are associated with the one or more SRS resources identified at least in part based on the SRI set.

[0014] In some aspects, an apparatus for wireless communication may include: a unit for sending at least one SRS resource set configuration for multiple SRS resources; a unit for receiving SRS in the SRS resources; a unit for determining a sequence of multiple repeated SRI sets to be used by a UE to send uplink communications, wherein the SRI set identifies one or more SRS resources in the SRS resources for receiving the SRS; and a unit for sending downlink control information identifying the sequence of the SRI sets to the UE.

[0015] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as generally described herein with reference to and as illustrated by the accompanying drawings and description.

[0016] The features and technical advantages of the examples have been outlined quite extensively above in accordance with the present disclosure so that the specific embodiments that follow can be better understood. Additional features and advantages will be described below. For the same purpose of achieving the present disclosure, the disclosed concepts and specific examples may be readily utilized as a basis for modifying or designing other structures. Such equivalent constructions do not depart from the scope of the appended claims. When considered in conjunction with the accompanying drawings, the characteristics of the concepts disclosed herein (both their organization and method of operation) together with the associated advantages will be better understood from the following description. Each of the figures in the accompanying drawings is provided for the purpose of illustration and description, and is not intended to limit the scope of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to understand the above-mentioned features of the present disclosure in detail, the contents briefly summarized above may be described in more detail with reference to various aspects, some of which are shown in the accompanying drawings. However, it should be noted that the accompanying drawings only illustrate certain typical aspects of the present disclosure and are therefore not to be considered as limiting the scope thereof, as the specification may admit other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0018] Figure 1 is a block diagram conceptually illustrating an example of a wireless communication network in accordance with various aspects of the present disclosure.

[0019] Figure 2 is a block diagram conceptually illustrating an example of a base station communicating with a UE in a wireless communication network according to various aspects of the present disclosure.

[0020] Figure 3 is a diagram illustrating an example of configuring an SRS resource set according to various aspects of the present disclosure.

[0021] Figure 4 and Figure 5 is a diagram illustrating an example of a signaling sequence for an uplink repeated SRI set according to various aspects of the present disclosure.

[0022] Figure 6 is a diagram illustrating example processes performed, for example, by a UE according to various aspects of the present disclosure.

[0023] Figure 7 is a diagram illustrating example processes performed, for example, by a base station according to various aspects of the present disclosure. DETAILED DESCRIPTION

[0024] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be embodied in a variety of different forms, and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. On the contrary, these aspects are provided so that the present disclosure will become thorough and complete, and the scope of the present disclosure will be fully conveyed to those skilled in the art. Based on the teachings herein, it should be appreciated by those skilled in the art that the scope of the present disclosure is intended to cover any aspect of the disclosure disclosed herein, whether it is implemented independently or in combination with any other aspect of the present disclosure. For example, a device or method can be implemented using any number of aspects set forth herein. In addition, the scope of the present disclosure is intended to cover such a device or method implemented using other structures, functions, or structures and functions of various aspects of the present disclosure set forth herein, or structures and functions of various aspects of the present disclosure set forth herein that are different from those set forth herein. It should be understood that any aspect of the disclosure disclosed herein can be embodied by one or more elements of the claims.

[0025] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using hardware, software, or any combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0026] It should be noted that although this document uses terms commonly associated with 3G and / or 4G wireless technologies to describe various aspects of the present disclosure, various aspects of the present disclosure may also be applied to other generation-based communication systems (such as 5G and beyond, which include NR technologies).

[0027] Figure 11 is a schematic diagram showing a wireless network 100 in which various aspects of the present disclosure may be implemented. The wireless network 100 may be an LTE network or some other wireless network (such as a 5G or NR network). The wireless network 100 may include a plurality of BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A BS is an entity that communicates with a user equipment (UE), and a BS may also be referred to as a base station, NR BS, Node B, gNB, 5G Node B (NB), access point, transmit receive point (TRP), and the like. Each BS may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0028] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by UEs with service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown, BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. A BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NRBS", "gNB", "TRP", "AP", "Node B", "5G NB", and "cell" may be used interchangeably herein.

[0029] In some aspects, the cells may not necessarily be stationary, and the geographic area of ​​the cells may move depending on the location of the mobile BS. In some aspects, the BSs may be interconnected with each other and / or to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces (such as direct physical connections, virtual networks, etc.) using any suitable transport network.

[0030] The wireless network 100 may also include a relay station. A relay station is an entity that can receive transmissions of data from an upstream station (e.g., a BS or a UE) and send transmissions of the data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions of other UEs. Figure 1 In the example shown, a relay station 110d may communicate with a macro BS 110a and a UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay station may also be referred to as a relay BS, a relay base station, a relay, or the like.

[0031] The wireless network 100 may be a heterogeneous network including different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 watts to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 watts to 2 watts).

[0032] The network controller 130 may be coupled to a set of BSs and may provide coordination and control for these BSs. The network controller 130 may communicate with the BSs via a backhaul. The BSs may also communicate with each other indirectly, for example, directly or via a wireless backhaul or a wired backhaul.

[0033] UE 120 (e.g., UE 120a, UE 120b, UE 120c) can be dispersed throughout the wireless network 100, and each UE can be stationary or mobile. UE can also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. UE can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet device, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biosensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio device), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing device, a global positioning system device, or any other suitable device configured to communicate via a wireless medium or a wired medium.

[0034] Some UEs may be considered to be machine type communication (MTC) UEs or evolved or enhanced machine type communication (eMTC) UEs. For example, MTC UEs and eMTC UEs include robots, drones, remote devices, sensors, meters, monitors, location tags, etc. that can communicate with a base station, another device (e.g., a remote device), or some other entity. For example, a wireless node may provide a connection to a network (e.g., a wide area network such as the Internet or a cellular network) or provide a connection to a network (e.g., a wide area network such as the Internet or a cellular network) via a wired communication link or a wireless communication link. Some UEs may be considered to be Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered to be user premises equipment (CPE). UE 120 may be included in a housing that houses components of UE 120 (such as a processor component, a memory component, etc.).

[0035] Generally, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a specific RAT and can operate on one or more frequencies. RAT can also be referred to as radio technology, air interface, etc. Frequency can also be referred to as carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0036] In some aspects, (e.g., without using base station 110 as an intermediary to communicate with each other) two or more UEs 120 (e.g., shown as UE 120a and UE 120e) can communicate directly using one or more sidelink channels. For example, UE 120 can communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocol (e.g., which may include vehicle-to-vehicle (V2V) protocol, vehicle-to-infrastructure (V2I) protocol, etc.), mesh network, etc. In this case, UE 120 can perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein performed by base station 110.

[0037] As indicated above, Figure 1 is provided as an example. Other examples can be found in Figure 1 The examples described are different.

[0038] Figure 2 A block diagram 200 shows a design 200 of a base station 110 and a UE 120, where the base station 110 and the UE 120 may be Figure 1 A base station in the base station and Figure 1Base station 110 may be equipped with T antennas 234a through 234t, and UE 120 may be equipped with R antennas 252a through 252r, where in general T ≥ 1 and R ≥ 1.

[0039] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for the UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS)) and synchronization signals (e.g., primary synchronization signals (PSS) and secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols (if applicable), and may provide T output symbol streams to T modulators (MOD) 232a to 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to an analog signal, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t may be transmitted via T antennas 234a to 234t, respectively. According to various aspects described in detail below, position coding may be used to generate synchronization signals to transmit additional information.

[0040] At UE 120, antennas 252a to 252r can receive downlink signals from base station 110 and / or other base stations and can provide received signals to demodulators (DEMOD) 254a to 254r, respectively. Each demodulator 254 can condition (e.g., filter, amplify, down-convert, and digitize) the received signal to obtain input samples. Each demodulator 254 can further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. MIMO detector 256 can obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. Receive processor 258 can process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to data sink 260, and provide decoded control information and system information to controller / processor 280. The channel processor may determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of UE 120 may be included in a housing.

[0041] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.) from a controller / processor 280. The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 (if applicable), further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. At the base station 110, uplink signals from the UE 120 and other UEs may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236 (if applicable), and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide decoded data to a data sink 239 and decoded control information to a controller / processor 240. The base station 110 may include a communication unit 244 and transmit to the network controller 130 via the communication unit 244. The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292.

[0042] Figure 2The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or any other component may perform one or more techniques associated with signaling sequences for uplink repeated SRI sets, as described in detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component may perform or direct e.g. Figure 6 The process of 600 Figure 7 The operations of process 700 and / or other processes as described herein. Memory 242 and memory 282 may store data and program codes for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions for wireless communication. For example, the one or more instructions, when executed by one or more processors of base station 110 and / or UE 120, may perform or direct, for example Figure 6 The process of 600 Figure 7 The scheduler 246 may schedule data transmission by the UE on the downlink and / or uplink.

[0043] In some aspects, the UE 120 may include: means for receiving at least one SRS resource set configuration for a plurality of SRS resources corresponding to respective SRS ports on which the SRS is to be sent; means for sending the SRS using the SRS resources; means for receiving downlink control information identifying a sequence of the SRS set; means for sending a plurality of repetitions of uplink communications based at least in part on the sequence of the SRS set, and the like. In some aspects, such means may include combining Figure 2 One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and the like.

[0044] In some aspects, the base station 110 may include: means for sending at least one SRS resource set configuration for a plurality of SRS resources; means for receiving SRS in the SRS resources; means for determining a sequence of a plurality of repeated SRI sets to be used by the UE to send uplink communications; means for sending downlink control information identifying the sequence of SRI sets to the UE, etc. In some aspects, such means may include combining Figure 2One or more components of base station 110 are depicted, such as antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and the like.

[0045] As indicated above, Figure 2 is provided as an example. Other examples can be found in Figure 2 The examples described are different.

[0046] Figure 3 is a diagram illustrating an example 300 of configuring SRS resource sets according to various aspects of the present disclosure.

[0047] The base station may configure the UE with one or more SRS resource sets to allocate resources for SRS transmission by the UE. For example, the configuration for the SRS resource set may be indicated in a radio resource control (RRC) message (e.g., an RRC configuration message, an RRC reconfiguration message, etc.). As shown in reference numeral 305, the SRS resource set may include one or more resources (e.g., shown as SRS resources), which may include time resources and / or frequency resources (e.g., time slots, symbols, resource blocks, periodicity for time resources, etc.).

[0048] As indicated by reference numeral 310, the SRS resource may correspond to an antenna port (e.g., an SRS port) on which the SRS is to be transmitted (e.g., in a time-frequency resource). In some aspects, the configuration for the SRS resource set may indicate a use case for the SRS resource set (e.g., in an SRS-SetUse information element). For example, the SRS resource set may have use cases for antenna switching, codebook, non-codebook, beam management, etc.

[0049] The antenna switching SRS resource set may be used to indicate downlink channel state information (CSI) with reciprocity between the uplink channel and the downlink channel. For example, when there is reciprocity between the uplink channel and the downlink channel, the base station may use the antenna switching SRS (e.g., an SRS sent using resources of the antenna switching SRS resource set) to obtain downlink CSI (e.g., to determine a downlink precoder for communication with the UE).

[0050] When the base station indicates the uplink precoder to the UE, the codebook SRS resource set may be used to indicate the uplink CSI. For example, when the base station is configured to indicate the uplink precoder to the UE (e.g., using the precoder codebook), the base station may use the codebook SRS (e.g., an SRS sent using resources of the codebook SRS resource set) to obtain the uplink CSI (e.g., to determine that the uplink precoder is to be indicated to the UE, and the UE uses the uplink precoder to communicate with the base station).

[0051] When the UE selects an uplink precoder (e.g., instead of the base station indicating the uplink precoder to be used by the UE), a non-codebook SRS resource set may be used to indicate the uplink CSI. For example, when the UE is configured to select an uplink precoder, the base station may use a non-codebook SRS (e.g., an SRS sent using resources of a non-codebook SRS resource set) to obtain uplink CSI. In this case, the non-codebook SRS may be precoded using a precoder selected by the UE (e.g., which may be indicated to the base station).

[0052] The beam-managed SRS resource set may be used to indicate CSI for millimeter wave communications.

[0053] The UE may use the SRS resources configured by the SRS resource set to send an SRS to the base station. The SRS resources used for SRS transmission may be identified by SRI. In addition, the SRS resources may be SRS resources of a non-codebook SRS resource set. The base station may determine one or more SRS resources (corresponding to one or more SRS ports) that the UE will use to send uplink communications based on SRS transmission. The base station may send downlink control information (DCI) providing an indication of the determined SRS resources to the UE. For example, the determined SRS resources may be indicated in the SRI field of the DCI. Four bits may be allocated to the SRI field so that the base station can use the SRI field to indicate one of sixteen possible SRS resource combinations (e.g., a combination of up to four SRS resources with a transmission rank of one, two, three, or four). The UE may use an uplink port corresponding to the SRS port of the SRS resource identified by the SRI of the DCI to send uplink communications (e.g., via a physical uplink shared channel (PUSCH)).

[0054] In some cases, the UE may be configured to send multiple repetitions of uplink communications. For example, the UE may send multiple repetitions of uplink communications on different beams to improve the transmission diversity of the uplink communications. However, according to current wireless communication systems, each repetition using a different beam is scheduled separately by DCI. For example, each repetition is scheduled by indicating a specific SRI for each repetition through DCI, resulting in increased latency.

[0055] Some techniques and apparatus described herein enable a base station to use a single DCI to indicate a sequence of SRI sets for multiple repetitions of uplink communications, thereby reducing the latency associated with scheduling multiple repetitions individually. In this way, a UE can send multiple repetitions of uplink communications by using different beams, different precoders, different antenna panels, etc. according to the sequence of SRI sets, thereby improving transmit diversity.

[0056] As indicated above, Figure 3 is provided as an example. Other examples can be found in Figure 3 The examples described are different.

[0057] Figure 4 4 is a diagram illustrating an example 400 of a signaling sequence for an uplink repeated SRI set according to various aspects of the present disclosure. Figure 4 As shown, base station 110 may provide information to UE 120 to enable UE 120 to identify a sequence of a plurality of repetitions of a SRI set to be used by UE 120 for sending uplink communications. In some aspects, UE 120 may be configured with a mapping of a sequence of SRI sets to index values. For example, base station 110 may send a configuration for the mapping to UE 110 via RRC signaling or a medium access control (MAC) control element (CE).

[0058] In some aspects, UE 120 may be configured with a set of mappings associated with a particular transmission rank (e.g., a particular number of transmission layers). For example, UE 120 may be configured with a first set of mappings associated with a transmission rank of 1 (i.e., the SRI set of mappings identifies one SRS resource), a second set of mappings associated with a transmission rank of 2 (i.e., the SRI set of mappings identifies two SRS resources), a third set of mappings associated with a transmission rank of 3 (i.e., the SRI set of mappings identifies three SRS resources), a fourth set of mappings associated with a transmission rank of 4 (i.e., the SRI set of mappings identifies four SRS resources), and so on.

[0059] like Figure 4As shown, mapping set 410 can be associated with a transmission rank of 2. The sequence of mapping set 410 can identify an SRI set for a specific number of repetitions. For example, the sequence of mapping set 410 identifies an SRI set for two repetitions. In some aspects, the sequence can identify an SRI set for another number of repetitions (e.g., four repetitions, eight repetitions, sixteen repetitions, etc.). Each SRI set (e.g., 01) of the sequence can include one or more SRIs, which identify one or more SRS resources corresponding to one or more antenna ports (i.e., SRS ports) of UE120. For example, SRI set 01 can identify SRS port 0 and SRS port 1 of UE 120.

[0060] The mapping set 410 may include a first mapping 420 of sequences of an SRI set to an index value and a second mapping 430 of sequences of an SRI set to an index value. In some aspects, the mapping set 410 may include more than two mappings. The first mapping 420 and the second mapping 430 (as well as any other mappings included in the mapping set 410) may be indexed according to the same index value. In other words, the first sequence of the first mapping 420 may be indexed to a first index value (index=0), and the first sequence of the second mapping 430 may also be indexed to the first index value (index=0), the second sequence of the first mapping 420 may be indexed to a second index value (index=1), and the second sequence of the second mapping 430 may also be indexed to the second index value (index=1), and so on. In this way, the mapping set 410 can use a relatively small number of index values ​​(e.g., sixteen index values) to identify any number of sequences of an SRI set (e.g., thirty-two sequences).

[0061] like Figure 4 And as shown by reference numeral 440, the base station 110 may send a configuration identifying the transmission rank, and the UE 120 may receive the configuration identifying the transmission rank. For example, the base station 110 may send the configuration identifying the transmission rank via RRC signaling or MAC CE. The transmission rank may enable the UE 120 to identify a specific mapping set to be used by the UE 120. For example, a configuration identifying a transmission rank of 2 may enable the UE 120 to identify the mapping set 410 (which identifies an SRI set of 2) to be used by the UE 120. In some aspects, the configuration may configure multiple repetitions of communications associated with the transmission rank on multiple PUSCHs.

[0062] As indicated by reference numeral 450, base station 110 may transmit control information (e.g., DCI, such as having DCI format 0_1) that provides scheduling for communication on PUSCH for UE 120, and UE 120 may receive control information (e.g., DCI, such as having DCI format 0_1) that provides scheduling for communication on PUSCH for UE 120. For example, the control information may schedule multiple repetitions of the communication on multiple PUSCHs (e.g., the control information may schedule a first PUSCH and a second PUSCH). The control information may also identify a sequence of SRI sets to be used by UE 120 to send multiple repetitions of the communication.

[0063] In some aspects, the control information may use a first field and a second field of the control information to identify a sequence of an SRI set. For example, the first field may be an SRI field of the control information, and the second field may be an antenna port field of the control information. In some cases, four bits may be allocated to the SRI field, allowing the SRI field to identify sequences of up to 16 SRI sets. In some cases, one or more reserved bits may be allocated to the antenna port field of the control information. Thus, using one reserved bit of the antenna port field in combination with four bits of the SRI field allows identification of sequences of up to thirty-two SRI sets. In addition, when more than one reserved bit is allocated to the antenna port field, sequences of additional SRI sets may be identified.

[0064] In some aspects, a value of a first field (e.g., an SRI field) identifies an index value of a set of mappings (e.g., a set of mappings having a transmission rank indicated by the configuration), and a value of a second field (e.g., a value indicated in one or more reserved bits of an antenna port field) identifies a particular mapping in the set of mappings. For example, referring to the set of mappings 410, the first field (e.g., an SRI field) may indicate an index value of 2, which may refer to a sequence of 01, 12 of the first mapping 420 or a sequence of 13, 23 of the second mapping 430. Continuing with the previous example, the second field (e.g., an antenna port field) may have a value of 0 to indicate that the index value 2 refers to the first mapping 420, or a value of 1 to indicate that the index value 2 refers to the second mapping 430.

[0065] As indicated by reference numeral 460, UE 120 may identify a sequence of SRI sets based on the control information. For example, UE 120 may process the control information to identify a value of the first field and a value of the second field. Based on the value of the first field (e.g., 2) and the value of the second field (e.g., 1), and with reference to mapping set 410, UE 120 may identify a sequence of SRI sets (e.g., 13, 23). For example, UE 120 may identify an index value of mapping set 410 based on a value of the first field (e.g., the SRI field), and may identify a specific mapping of mapping set 410 based on a value of the second field (e.g., a value indicated in one or more reserved bits of the antenna port field).

[0066] As shown by reference numeral 470, UE 120 may send multiple repetitions (e.g., to multiple TRPs) of uplink communications (e.g., transport blocks) according to the sequence of the identified SRI set. In some aspects, UE 120 may determine one or more uplink ports to be used for the repetitions based on the one or more SRS resources identified by the SRI set. For example, the SRS resource may correspond to an SRS port (e.g., antenna port 1), and UE 120 may determine the corresponding uplink port (e.g., antenna port 1) based on the SRS port.

[0067] UE 120 may send a first repetition (e.g., a first PUSCH) using a first SRI set (e.g., 13) of a sequence indicating a first combination of uplink ports, send a second repetition (e.g., a second PUSCH) using a second SRI set (e.g., 23) of a sequence indicating a second combination of uplink ports, and so on. In some cases, the number of repetitions configured for UE 120 may be greater than the number of SRI sets in the sequence. In this case, UE 120 may send sequential repetitions using sequential cycles through the sequence of SRI sets.

[0068] As indicated above, Figure 4 is provided as an example. Other examples can be found in Figure 4 The examples described are different.

[0069] Figure 5 5 is a diagram illustrating an example 500 of a signaling sequence for an uplink repeated SRI set according to various aspects of the present disclosure. Figure 5 As shown, base station 110 may provide information to UE 120 to enable UE 120 to identify a sequence of SRI sets to be used by UE 120 to send multiple repetitions for uplink communications.

[0070] like Figure 5And as indicated by reference numeral 520, base station 110 may transmit a configuration for mapping a sequence of an SRI set (e.g., mapping 510) to an index value, and UE 120 may receive a configuration for mapping a sequence of an SRI set (e.g., mapping 510) to an index value. For example, base station 110 may transmit a configuration identifying the mapping via RRC signaling. In some aspects, the configuration or another RRC configuration may also identify whether UE 120 transmits uplink communications using the mapping or using a default interpretation of the SRI indication (e.g., whereby the same precoder or beam is used for all repetitions).

[0071] Mapping 510 may identify a sequence of multiple SRI sets of different transmission ranks. Figure 5 As shown, mapping 510 identifies a sequence of two SRI sets with a transmission rank of 2 (index=0, index=1), a sequence of an SRI set with a transmission rank of 1 (index=2), and a sequence of an SRI set with a transmission rank of 3 (index=15). The sequence of mapping 510 may identify an SRI set for a particular number of repetitions. For example, Figure 5 As shown, the sequence of mapping 510 identifies an SRI set for four repetitions. In some aspects, the sequence may identify an SRI set for another number of repetitions (e.g., two repetitions, eight repetitions, sixteen repetitions, etc.). In addition, mapping 510 may identify a number of sequences of the SRI set corresponding to the number of sequences identifiable by a field of control information sent by base station 110 (e.g., an SRI field that may be allocated four bits) (e.g., sixteen).

[0072] In some aspects, mapping 510 may identify sequences of multiple SRI sets of the same transmission rank. In this case, mapping 510 may identify a number of sequences of SRI sets that is greater than the number of sequences that can be identified by a field of control information sent by base station 110 (e.g., an SRI field).

[0073] In some aspects, mapping 510 may be a primary mapping that includes a number of sequences of an SRI set (e.g., 64 sequences), where the number is greater than the number of sequences identifiable by a field of control information sent by base station 110 (e.g., an SRI field). In this case, base station 110 may send information identifying a secondary mapping, and UE 120 may receive information identifying a secondary mapping that includes a subset (e.g., down-selected) of the sequences of the primary mapping. For example, the secondary mapping may include a number of sequences of an SRI set that corresponds at most to the number of sequences identifiable by a field of control information sent by base station 110 (e.g., an SRI field). Base station 110 may send information identifying the secondary mapping to UE 120 via a MAC CE. In this manner, base station 110 may update the secondary mapping more frequently than the primary mapping.

[0074] As indicated by reference numeral 530, the base station 110 may transmit control information (e.g., DCI, such as having DCI format 0_1) that provides scheduling for the communication of the UE 120 on the PUSCH, and the UE 120 may receive control information (e.g., DCI, such as having DCI format 0_1) that provides scheduling for the communication of the UE 120 on the PUSCH. For example, the control information may schedule multiple repetitions of the communication on multiple PUSCHs. The control information may also identify a sequence of SRI sets to be used by the UE 120 to send multiple repetitions of the communication. In some aspects, the control information may identify an index value of the mapping 510 (or a secondary mapping). For example, a value of a field of the control information (e.g., an SRI field) may identify an index value. In some aspects, when the mapping 510 identifies a sequence of SRI sets of the same transmission rank, the control information may use a first field (e.g., an SRI field) and a second field (e.g., an antenna port field) of the control information to identify the sequence of the SRI sets.

[0075] As indicated by reference numeral 540, UE 120 may identify a sequence of the SRI set based on the control information. For example, UE 120 may process the control information to identify an index value. Based on the index value and with reference to mapping 510, UE 120 may identify a sequence of the SRI set.

[0076] In some aspects, when mapping 510 identifies a sequence of SRI sets of the same transmission rank, UE 120 may determine that the control information is using a first field (e.g., an SRI field) and a second field (e.g., an antenna port field) to identify the sequence of the SRI set. For example, UE 120 may determine that the control information is using a first field and a second field to identify the sequence of the SRI set based at least in part on a determination that the number of sequences of the SRI set identifiable by the first field (e.g., sixteen) is less than the number of sequences of the SRI set of mapping 510 (e.g., thirty-two). In this case, UE 120 may process the control information to identify a value of the first field and a value of the second field. Based on the value of the first field and the value of the second field, and with reference to mapping 510, UE 120 may identify the sequence of the SRI set.

[0077] For example, the value of the first field (e.g., SRI field) may indicate the index position of the sequence in a particular sequence group, and the value of the second field (e.g., antenna port field) may indicate a particular sequence group. Each sequence group may include a number of sequences corresponding to the number of sequences identifiable by the first field. For example, if the first field (e.g., SRI field) may identify sixteen sequences, and mapping 510 identifies thirty-two sequences, UE 120 may determine that mapping 510 is to be divided into two groups of sixteen sequences. Thus, the first group may be identified by a first value (e.g., 0) of the second field, and the second group may be identified by a second value (e.g., 1) of the second field.

[0078] In some aspects, the value of the second field may be indicated in one or more reserved bits of the second field (e.g., one or more reserved bits of the antenna port field). In this case, the UE 120 may identify the location of the reserved bits in the second field based on a demodulation reference signal (DMRS) identifier of the control information and the transmission rank of the SRI set of mapping 510. Figure 5 As shown, UE 120 may be configured with one or more DMRS port tables. Referring to DMRS port table 560, a particular combination of a DMRS identifier (e.g., 1) and a transmission rank (e.g., 2) may indicate that the reserved bits are located in rows 4-7 of the second field (e.g., DMRS port table 560).

[0079] As shown in reference numeral 550, the UE 120 may send multiple repetitions (e.g., to multiple TRPs) of uplink communications (e.g., transport blocks) based on the sequence of identified SRI sets, as described in more detail above. In some cases, the number of repetitions configured for the UE 120 may be greater than the number of SRI sets in the sequence. In some aspects, the UE 120 may send sequential repetitions using at least one copy of each SRI set in a cycle through the sequence of SRI sets. For example, referring to mapping 510, the UE may send eight repetitions as 01, 01, 12, 12, 23, 23, 01, 01 based on a sequence with index = 1. In some aspects, the UE 120 may send sequential repetitions using more than one cycle through the sequence of SRI sets. For example, referring to mapping 510, the UE may send eight repetitions as 01, 12, 23, 01, 01, 12, 23, 01 based on a sequence with index = 1. In some aspects, base station 110 may send (eg, via RRC signaling) an indication to UE 120 whether to send repetitions using copies or multiple cycles.

[0080] As indicated above, Figure 5 is provided as an example. Other examples can be found in Figure 5 The examples described are different.

[0081] Figure 6 is a diagram illustrating an example process 600, performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process 600 is an example of a UE (eg, UE 120, etc.) performing operations associated with a signaling sequence of an SRI set for uplink repetition.

[0082] like Figure 6 As shown, in some aspects, process 600 may include receiving at least one SRS resource set configuration for a plurality of SRS resources corresponding to respective SRS ports on which SRS is to be transmitted (block 610). For example, the UE may receive (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, etc.) at least one SRS resource set configuration for a plurality of SRS resources corresponding to respective SRS ports on which SRS is to be transmitted, as described above.

[0083] like Figure 6As further shown, in some aspects, process 600 may include sending the SRS using the SRS resources (block 620). For example, the UE may send the SRS using the SRS resources (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.), as described above.

[0084] like Figure 6 As further shown, in some aspects, process 600 may include receiving downlink control information identifying a sequence of SRI sets, wherein the SRI set identifies one or more of the SRS resources for transmitting the SRS (block 630). For example, the UE may receive downlink control information identifying a sequence of SRI sets (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller / processor 280, etc.), as described above. In some aspects, the SRI set identifies one or more of the SRS resources for transmitting the SRS.

[0085] like Figure 6 As further shown, in some aspects, process 600 may include sending multiple repetitions of uplink communications based at least in part on a sequence of SRI sets, wherein the repetitions are sent using one or more uplink ports corresponding to one or more SRS ports associated with one or more SRS resources identified based at least in part on the SRI set (block 640). For example, the UE may (e.g., using controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, etc.) send multiple repetitions of uplink communications based at least in part on a sequence of SRI sets, as described above. In some aspects, the repetitions are sent using one or more uplink ports corresponding to one or more SRS ports associated with SRS resources identified based at least in part on the SRI set.

[0086] Process 600 may include additional aspects, such as any single aspect or any combination of the aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0087] In a first aspect, the downlink control information identifies a sequence of the SRI set using a first field of the downlink control information and a second field of the downlink control information. In a second aspect, alone or in combination with the first aspect, the first field is an SRI field of the downlink control information, and the second field is an antenna port field of the downlink control information.

[0088] In a third aspect, either alone or in combination with one or more of the first and second aspects, the value of the first field identifies an index value for a specific mapping of a sequence of an SRI set to an index value, and the value of the second field identifies the specific mapping. In a fourth aspect, either alone or in combination with one or more of the first to third aspects, process 600 further includes: receiving a configuration identifying a transmission rank associated with an SRI set in a sequence of the SRI set, and the specific mapping is associated with the transmission rank.

[0089] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, process 600 further comprises: receiving information identifying a mapping of sequences of a set of SRIs to index values. In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the information identifying the mapping identifies a secondary mapping comprising a subset of the sequences of the set of SRIs included in the primary mapping.

[0090] In the seventh aspect, either alone or in combination with one or more aspects from the first to the sixth aspects, the downlink control information identifies an index value of the mapping. In the eighth aspect, either alone or in combination with one or more aspects from the first to the seventh aspects, the multiple repetitions are sent using at least one copy of each SRI set in a cycle through a sequence of the SRI set. In the ninth aspect, either alone or in combination with one or more aspects from the first to the eighth aspects, the multiple repetitions are sent using more than one cycle through a sequence of the SRI set.

[0091] In the tenth aspect, alone or in combination with one or more of the first to ninth aspects, the process 600 further includes: receiving information identifying a mapping of a sequence of an SRI set to an index value, wherein the SRI sets in the sequence of the SRI set have the same transmission rank, and the downlink control information uses the first field of the downlink control information and the second field of the downlink control information to identify the sequence of the SRI set. In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the process 600 further includes: determining that the second field is being used to identify the sequence of the SRI set based at least in part on a determination that the number of sequences of the SRI set that can be identified by the first field is less than the number of sequences of the mapped SRI set. In the twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the process 600 further includes: identifying the position of the sequence being used to identify the SRI set in the second field based at least in part on a demodulation reference signal identifier of the downlink control information and the transmission rank.

[0092] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the at least one SRS resource set is configured for a non-codebook SRS resource set.

[0093] Although Figure 6 Example blocks of process 600 are shown, but in some aspects, Figure 6 Process 600 may include additional blocks, fewer blocks, different blocks, or blocks in a different arrangement than described in . Additionally or alternatively, two or more of the blocks in process 600 may be performed in parallel.

[0094] Figure 7 is a diagram illustrating an example process 700, performed, for example, by a base station, in accordance with various aspects of the present disclosure. Example process 700 is an example of a base station (eg, base station 110, etc.) performing operations associated with signaling sequences of sounding reference signal resource indicator sets for uplink repetitions.

[0095] like Figure 7 As shown, in some aspects, process 700 may include: sending at least one SRS resource set configuration for multiple SRS resources (block 710). For example, the base station may (e.g., using controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, etc.) send at least one SRS resource set configuration for multiple SRS resources, as described above.

[0096] like Figure 7As further shown, in some aspects, process 700 may include receiving an SRS in an SRS resource (block 720). For example, a base station may receive an SRS in an SRS resource (e.g., using antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller / processor 240, etc.), as described above.

[0097] like Figure 7 As further shown, in some aspects, process 700 may include determining a sequence of a plurality of repetitions of a set of SRIs to be used by the UE to send for uplink communications, wherein the set of SRIs identifies one or more of the SRS resources for receiving the SRS (block 730). For example, the base station may determine (e.g., using controller / processor 240, etc.) a sequence of a plurality of repetitions of a set of SRIs to be used by the UE to send for uplink communications, as described above. In some aspects, the set of SRIs identifies one or more of the SRS resources for receiving the SRS.

[0098] like Figure 7 As further shown, in some aspects, process 700 may include sending downlink control information identifying a sequence of SRI sets to the UE (block 740). For example, the base station may send downlink control information identifying a sequence of SRI sets to the UE (e.g., using controller / processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, etc.), as described above.

[0099] Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0100] In a first aspect, the downlink control information identifies a sequence of the SRI set using a first field of the downlink control information and a second field of the downlink control information. In a second aspect, alone or in combination with the first aspect, the first field is an SRI field of the downlink control information, and the second field is an antenna port field of the downlink control information.

[0101] In a third aspect, either alone or in combination with one or more of the first and second aspects, the value of the first field identifies an index value of a specific mapping of a sequence of an SRI set to an index value, and the value of the second field identifies the specific mapping. In a fourth aspect, either alone or in combination with one or more of the first to third aspects, process 700 further includes: sending a configuration identifying a transmission rank associated with an SRI set in the sequence of the SRI set, wherein the specific mapping is associated with the transmission rank.

[0102] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, process 700 further comprises: sending information identifying a mapping of sequences of the SRI set to index values. In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the information identifying the mapping identifies a secondary mapping comprising a subset of the sequences of the SRI set included in the primary mapping.

[0103] In the seventh aspect, either alone or in combination with one or more aspects from the first to the sixth aspects, the downlink control information identifies an index value of the mapping. In the eighth aspect, either alone or in combination with one or more aspects from the first to the seventh aspects, process 700 further includes: sending an indication that the UE will send the multiple repetitions using one copy of each SRI set in a cycle through the sequence of the SRI set. In the ninth aspect, either alone or in combination with one or more aspects from the first to the eighth aspects, process 700 further includes: sending an indication that the UE will send the multiple repetitions using more than one cycle through the sequence of the SRI set.

[0104] In the tenth aspect, alone or in combination with one or more aspects from the first to the ninth aspects, process 700 also includes: sending a mapping of a sequence of an SRI set to an index value, wherein the SRI sets in the sequence of the SRI set have the same transmission rank, and the downlink control information uses the first field of the downlink control information and the second field of the downlink control information to identify the sequence of the SRI set.

[0105] In the eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the at least one SRS resource set is configured for a non-codebook SRS resource set.

[0106] Although Figure 7 An example block diagram of process 700 is shown, but in some aspects, the Figure 7The process 700 may include additional blocks, fewer blocks, different blocks, or blocks in a different arrangement than described in the process 700. Additionally or alternatively, two or more blocks in the blocks of the process 700 may be performed in parallel.

[0107] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure, or may be acquired from implementation of the various aspects.

[0108] As used herein, the term "component" is intended to be broadly interpreted as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented using hardware, firmware, and / or a combination of hardware and software.

[0109] As used herein, satisfying a threshold may refer to a value greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0110] It will be apparent that the systems and / or methods described herein may be implemented in different forms of hardware, firmware, and / or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems and / or methods is not a limitation of the various aspects. Therefore, the operation and behavior of the systems and / or methods are described herein without reference to specific software code - it is to be understood that software and hardware may be designed to implement the systems and / or methods based, at least in part, on the description herein.

[0111] Even if the specific combination of features is recorded in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner that is not clearly recorded in the claims and / or not disclosed in the specification. Although each dependent claim listed below may directly depend on only one claim, the disclosure of various aspects includes each dependent claim combined with each other claim in the claim set. The phrase "at least one of" referred to as the list of items refers to any combination of these items, including a single member. For example, "at least one of a, b or c" is intended to cover: a, b, c, ab, ac, bc and abc, and any combination of the same elements with multiples (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc or any other ordering of a, b and c).

[0112] Unless explicitly described as such, the elements, actions or instructions used herein should not be interpreted as decisive or essential. In addition, as used herein, the articles "a" and "an" are intended to include one or more entries, and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more entries (e.g., related entries, unrelated entries, combinations of related entries and unrelated entries, etc.), and can be used interchangeably with "one or more". In places where only one entry is meant, the phrase "only one" or similar language is used. In addition, as used herein, the terms "has", "have", "having" etc. are intended to be open-ended terms. Further, unless otherwise expressly provided, the phrase "based on" is intended to mean "based at least in part on".

Claims

1. A method of wireless communication performed by a user equipment (UE), comprising: receiving, in a radio resource control (RRC) message, at least two sounding reference signal (SRS) resource set configurations for a plurality of SRS resources corresponding to respective SRS ports on which the SRS is to be transmitted; sending an SRS using the plurality of SRS resources; receiving downlink control information identifying a sequence of a set of SRS resource indicators (SRIs), The SRI set in the sequence of the SRI sets identifies an SRS resource among the multiple SRS resources used to send the SRS; and transmitting a plurality of repetitions of an uplink communication based at least in part on a sequence of the SRI set, Wherein, repetitions of the plurality of repetitions are transmitted based at least in part on the SRI set using one or more uplink ports corresponding to one or more SRS ports associated with the SRS resource.

2. The method according to claim 1, wherein: The downlink control information identifies a sequence of the SRI set using a first field of the downlink control information and a second field of the downlink control information.

3. The method according to claim 2, wherein: The first field is an SRI field of the downlink control information, and the second field is an antenna port field of the downlink control information.

4. The method according to claim 2, wherein: The value of the first field identifies an index value of a specific mapping, wherein the specific mapping is a mapping of a sequence of an SRI set to an index value, and the value of the second field identifies the specific mapping.

5. The method according to claim 4, further comprising: receiving a configuration identifying a transmission rank associated with the SRI set, Therein, the specific mapping is associated with the transmission rank.

6. The method according to claim 1, further comprising: Information identifying a mapping of sequences to index values ​​for a set of SRIs is received.

7. The method according to claim 6, wherein: The information identifying the mapping identifies a secondary mapping comprising a subset of the sequences of the set of SRIs included in the primary mapping.

8. The method according to claim 6, wherein: The downlink control information identifies an index value of the mapping.

9. The method according to claim 1, wherein: The plurality of repetitions are sent using at least one copy of each SRI set in a cycle through the sequence of SRI sets.

10. The method according to claim 1, wherein: The plurality of repetitions are sent using more than one cycle through a sequence of the SRI set.

11. The method according to claim 1, in, The SRI sets in the sequence of SRI sets have the same transmission rank, and The downlink control information uses a first field of the downlink control information and a second field of the downlink control information to identify a sequence of the SRI set.

12. The method according to claim 11, further comprising: Based at least in part on determining that the number of sequences of the SRI set that can be identified by the first field is less than the number of sequences of the mapped SRI set, it is determined that the second field is being used to identify the sequence of the SRI set.

13. The method according to claim 12, further comprising: A position of a sequence in the second field being used to identify the SRI set is identified based at least in part on a demodulation reference signal identifier of the downlink control information and the transmission rank.

14. The method according to claim 1, wherein: The at least two SRS resource sets are configured for non-codebook SRS resource sets.

15. A method of wireless communication performed by a network node, comprising: sending at least two sounding reference signal (SRS) resource set configurations for a plurality of SRS resources in a radio resource control (RRC) message; receiving an SRS in the plurality of SRS resources; determining a sequence of a set of SRS resource indicators (SRIs) to be used by a user equipment (UE) to transmit a plurality of repetitions for uplink communications, The SRI set in the sequence of the SRI sets identifies an SRS resource among the multiple SRS resources for receiving the SRS; and wherein a repetition in the plurality of repetitions is to be sent based on the SRI set; and Downlink control information identifying a sequence of the SRI set is sent.

16. The method according to claim 15, wherein: The downlink control information identifies a sequence of the SRI set using a first field of the downlink control information and a second field of the downlink control information.

17. The method according to claim 16, wherein: The first field is an SRI field of the downlink control information, and the second field is an antenna port field of the downlink control information.

18. The method according to claim 16, wherein: The value of the first field identifies an index value of a specific mapping, wherein the specific mapping is a mapping of a sequence of an SRI set to an index value, and the value of the second field identifies the specific mapping.

19. The method according to claim 18, further comprising: sending a configuration identifying a transmission rank associated with the SRI set, Therein, the specific mapping is associated with the transmission rank.

20. The method of claim 15, further comprising: Send information identifying the mapping of sequences to index values ​​for the SRI set.

21. The method according to claim 20, wherein: The information identifying the mapping identifies a secondary mapping comprising a subset of the sequences of the set of SRIs included in the primary mapping.

22. The method according to claim 20, wherein: The downlink control information identifies an index value of the mapping.

23. The method of claim 15, further comprising: An indication is sent that the UE is to send the plurality of repetitions using one copy of each SRI set in a cycle through the sequence of the SRI sets.

24. The method of claim 15, further comprising: An indication is sent that the UE is to send the plurality of repetitions using more than one cycle through a sequence of the SRI set.

25. The method of claim 15, wherein: The SRI sets in the sequence of SRI sets have the same transmission rank, and The downlink control information uses a first field of the downlink control information and a second field of the downlink control information to identify a sequence of the SRI set.

26. The method of claim 15, wherein: The at least two SRS resource sets are configured for non-codebook SRS resource sets.

27. A user equipment (UE) for wireless communication, comprising: Memory; as well as One or more processors coupled to the memory, the one or more processors being configured to perform the following operations: receiving, in a radio resource control (RRC) message, at least two sounding reference signal (SRS) resource set configurations for a plurality of SRS resources corresponding to respective SRS ports on which the SRS is to be transmitted; sending an SRS using the plurality of SRS resources; receiving downlink control information identifying a sequence of a set of SRS resource indicators (SRIs), The SRI set in the sequence of the SRI sets identifies an SRS resource among the multiple SRS resources used to send the SRS; and transmitting a plurality of repetitions of an uplink communication based at least in part on a sequence of the SRI set, Wherein, repetitions of the plurality of repetitions are transmitted based at least in part on the SRI set using one or more uplink ports corresponding to one or more SRS ports associated with the SRS resource.

28. The UE according to claim 27, wherein: The downlink control information identifies a sequence of the SRI set using a first field of the downlink control information and a second field of the downlink control information.

29. The UE according to claim 28, wherein: The value of the first field identifies an index value of a specific mapping, wherein the specific mapping is a mapping of a sequence of an SRI set to an index value, and the value of the second field identifies the specific mapping.

30. The UE of claim 29, wherein the one or more processors are further configured to: receive a configuration identifying a transmission rank associated with the SRI set, in, The specific mapping is associated with the transmission rank.

31. The UE of claim 27, wherein the one or more processors are further configured to receive information identifying a mapping of sequences of a SRI set to index values.

32. The UE according to claim 27, in, The SRI sets in the sequence of SRI sets have the same transmission rank, and The downlink control information uses a first field of the downlink control information and a second field of the downlink control information to identify a sequence of the SRI set.

33. According to the UE of claim 32, the one or more processors are also configured to determine that the second field is being used to identify the sequence of the SRI set based at least in part on determining that the number of sequences of the SRI set that can be identified by the first field is less than the number of sequences of the mapped SRI set.

34. According to the UE of claim 32, the one or more processors are further configured to: identify the position of the sequence in the second field being used to identify the SRI set based at least in part on the demodulation reference signal identifier of the downlink control information and the transmission rank.

35. A network node for wireless communication, comprising: Memory; as well as One or more processors coupled to the memory, the one or more processors being configured to perform the following operations: sending at least two sounding reference signal (SRS) resource set configurations for a plurality of SRS resources in a radio resource control (RRC) message; receiving an SRS in the plurality of SRS resources; determining a sequence of a set of SRS resource indicators (SRIs) to be used by a user equipment (UE) to transmit a plurality of repetitions for uplink communications, The SRI set in the sequence of the SRI sets identifies an SRS resource among the multiple SRS resources for receiving the SRS, and wherein a repetition in the plurality of repetitions is to be sent based on the SRI set; and Downlink control information identifying a sequence of the SRI set is sent.

36. The network node according to claim 35, wherein: The downlink control information identifies a sequence of the SRI set using a first field of the downlink control information and a second field of the downlink control information.

37. The network node according to claim 36, wherein: The value of the first field identifies an index value of a specific mapping, wherein the specific mapping is a mapping of a sequence of an SRI set to an index value, and the value of the second field identifies the specific mapping.

38. The network node of claim 37, wherein the one or more processors are further configured to: send a configuration identifying a transmission rank associated with the SRI set, in, The specific mapping is associated with the transmission rank.

39. The network node of claim 36, the one or more processors further configured to send information identifying a mapping of sequences of a set of SRIs to index values.

40. The network node of claim 36, the one or more processors further configured to send an indication that the UE is to send the plurality of repetitions using one copy of each SRI set in a cycle through a sequence of the SRI sets.

41. The network node of claim 36, the one or more processors further configured to send an indication that the UE is to send the plurality of repetitions using more than one cycle through the sequence of the SRI set.

42. The network node of claim 36, wherein: The SRI sets in the sequence of SRI sets have the same transmission rank, and The downlink control information uses a first field of the downlink control information and a second field of the downlink control information to identify a sequence of the SRI set.

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