Probing reference signal repeated configuration

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive configuration information configuring a reference signal (RS) transmission with a repetition factor, where the configuration information indicates one or more parameters for the RS transmission, the one or more parameters including at least one of the following: a sequence hopping configuration associated with the RS transmission, a cyclic shift offset configuration associated with the RS transmission, or a frequency hopping configuration indicating subcarrier hopping across adjacent RS symbols. The UE may perform the RS transmission using the repetition factor according to the configuration. Numerous other aspects are described.

Description

[0001] Public domain

[0002] Aspects of the present disclosure generally relate to wireless communication, and more particularly, to techniques and apparatus for sounding reference signal (SRS) repetition configuration.

[0003] Background

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. A typical wireless communication system may employ a multiple access technology that is capable of supporting 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 / Advanced LTE is an enhanced set of the Universal Mobile Telecommunications System (UMTS) mobile standards promulgated by the Third Generation Partnership Project (3GPP).

[0005] A wireless network may include a number of base stations (BSs) capable of supporting communication of several user equipments (UEs). The UEs may communicate with the BSs via a downlink and an uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, the BS may be referred to as a B node, gNB, access point (AP), radio head, transmission reception point (TRP), New Radio (NR) BS, 5G B node, and so on.

[0006] The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipments to communicate at the urban, national, regional, and even global levels. NR (which may also be referred to as 5G) is an enhanced set of the LTE mobile standards promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by using orthogonal frequency division multiplexing (OFDM) with cyclic prefix (CP) (CP-OFDM) on the downlink (DL), 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 improve spectral efficiency, reduce cost, improve services, utilize new spectrum, and better integrate with other open standards. As the demand for mobile broadband access continues to grow, further improvements to LTE, NR, and other radio access technologies are still useful.

[0007] Overview

[0008] In some aspects, a wireless communication method performed by a user equipment (UE) includes: receiving configuration information configuring a reference signal (RS) transmission with a repetition factor, where the configuration information indicates one or more parameters for the RS transmission, the one or more parameters including at least one of the following: a sequence hopping configuration associated with the RS transmission, a cyclic shift offset configuration associated with the RS transmission, or a frequency hopping configuration indicating subcarrier hopping across adjacent RS symbols; and performing the RS transmission using the repetition factor according to the configuration.

[0009] In some aspects, a wireless communication method performed by a base station includes: transmitting configuration information configuring an RS transmission with a repetition factor, where the configuration information indicates one or more parameters for the RS transmission, the one or more parameters including at least one of the following: a sequence hopping configuration associated with the RS transmission, a cyclic shift offset configuration associated with the RS transmission, or a frequency hopping configuration indicating subcarrier hopping across adjacent RS symbols; and receiving the RS transmission using the repetition factor according to the configuration.

[0010] In some aspects, a UE for wireless communication includes a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: receive configuration information configuring an RS transmission with a repetition factor, where the configuration information indicates one or more parameters for the RS transmission, the one or more parameters including at least one of the following: a sequence hopping configuration associated with the RS transmission, a cyclic shift offset configuration associated with the RS transmission, or a frequency hopping configuration indicating subcarrier hopping across adjacent RS symbols; and perform the RS transmission using the repetition factor according to the configuration.

[0011] In some aspects, a base station for wireless communication includes a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: transmit configuration information configuring an RS transmission with a repetition factor, where the configuration information indicates one or more parameters for the RS transmission, the one or more parameters including at least one of the following: a sequence hopping configuration associated with the RS transmission, a cyclic shift offset configuration associated with the RS transmission, or a frequency hopping configuration indicating subcarrier hopping across adjacent RS symbols; and receive the RS transmission using the repetition factor according to the configuration.

[0012] In some aspects, a non-transitory computer-readable medium storing an instruction set for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: receive configuration information configuring an RS transmission with a repetition factor, where the configuration information indicates one or more parameters for the RS transmission, the one or more parameters including at least one of: a sequence hopping configuration associated with the RS transmission, a cyclic shift offset configuration associated with the RS transmission, or a frequency hopping configuration indicating subcarrier hopping across adjacent RS symbols; and perform the RS transmission using the repetition factor according to the configuration.

[0013] In some aspects, a non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set including one or more instructions that, when executed by one or more processors of a base station, cause the base station to: transmit configuration information configuring an RS transmission with a repetition factor, where the configuration information indicates one or more parameters for the RS transmission, the one or more parameters including at least one of: a sequence hopping configuration associated with the RS transmission, a cyclic shift offset configuration associated with the RS transmission, or a frequency hopping configuration indicating subcarrier hopping across adjacent RS symbols; and receive the RS transmission using the repetition factor according to the configuration.

[0014] In some aspects, a device for wireless communication includes: means for receiving configuration information configuring an RS transmission with a repetition factor, where the configuration information indicates one or more parameters for the RS transmission, the one or more parameters including at least one of: a sequence hopping configuration associated with the RS transmission, a cyclic shift offset configuration associated with the RS transmission, or a frequency hopping configuration indicating subcarrier hopping across adjacent RS symbols; and means for performing the RS transmission using the repetition factor according to the configuration.

[0015] In some aspects, a device for wireless communication includes: means for transmitting configuration information configuring an RS transmission with a repetition factor, where the configuration information indicates one or more parameters for the RS transmission, the one or more parameters including at least one of: a sequence hopping configuration associated with the RS transmission, a cyclic shift offset configuration associated with the RS transmission, or a frequency hopping configuration indicating subcarrier hopping across adjacent RS symbols; and means for receiving the RS transmission using the repetition factor according to the configuration.

[0016] Aspects generally include methods, apparatuses, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems substantially as described herein with reference to the figures and as illustrated in the figures.

[0017] The foregoing has outlined rather broadly the features and technical advantages of examples in accordance with the present disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes as the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both as to their organization and method of operation, as well as associated advantages, will be better understood from the following description when considered in conjunction with the accompanying drawings. Each of the drawings is provided for purposes of illustration and description, and is not to be construed as limiting the definition of the claims. Brief Description of the Drawings

[0019] To understand the above-described features of the present disclosure in more detail, reference may be made to the various aspects, some of which are illustrated in the accompanying drawings. It should be noted, however, that the drawings illustrate only certain typical aspects of the present disclosure and should not be considered as limiting its scope, as the description may admit of other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0020] Figure 1 is a diagram illustrating an example of a wireless network in accordance with various aspects of the present disclosure.

[0021] Figure 2 is a diagram illustrating an example of a base station and a UE in communication in a wireless network in accordance with various aspects of the present disclosure.

[0022] Figure 3 is a diagram illustrating an example of a sounding reference signal (SRS) resource set in accordance with various aspects of the present disclosure.

[0023] Figure 4 is a diagram illustrating an example of a repetition scheme for SRS in accordance with various aspects of the present disclosure.

[0024] Figure 5 is a diagram illustrating an example of signaling associated with an SRS repetition configuration in accordance with various aspects of the present disclosure.

[0025] Figure 6 is a diagram illustrating an example of a sequence of SRS symbolsets that is at least partially based on a sequence hopping configuration in accordance with various aspects of the present disclosure.

[0026] Figure 7 is a diagram illustrating an example of SRS transmission using a cyclic shift offset configuration in accordance with various aspects of the present disclosure.

[0027] Figure 8 is a diagram illustrating an example of SRS transmission for partial frequency sounding SRS using a cyclic shift offset configuration in accordance with various aspects of the present disclosure.

[0028] Figure 9 FIG. is an illustration depicting an example of SRS transmission with a usage frequency jump configuration in accordance with various aspects of the present disclosure.

[0029] Figure 10 FIG. is an illustration depicting an example process, such as one performed by a UE, in accordance with various aspects of the present disclosure.

[0030] Figure 11 FIG. is an illustration depicting an example process, such as one performed by a base station, in accordance with various aspects of the present disclosure.

[0031] Figure 12 FIG. is a block diagram of an example apparatus for wireless communication in accordance with various aspects of the present disclosure.

[0032] Figure 13 FIG. is a block diagram of an example apparatus for wireless communication in accordance with various aspects of the present disclosure.

[0033] DETAILED DESCRIPTION

[0034] Aspects of the present disclosure are described more fully hereinafter with reference to the accompanying drawings. However, the present disclosure may be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Based on the teachings herein, one of ordinary skill in the art should appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the present disclosure. For example, any number of the aspects set forth herein may be used to implement an apparatus or practice a method. In addition, the scope of the present disclosure is intended to cover such apparatus or methods practiced using other structures, functionality, or structures and functionality in addition to or as a supplement to those set forth herein. It should be understood that any aspect of the present disclosure disclosed herein may be implemented by one or more elements of a claim.

[0035] Certain aspects of a telecommunications system will now be presented with reference to various apparatuses and techniques. These apparatuses and techniques will be described in detail hereinafter and illustrated in the 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 a combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

[0036] It should be noted that although aspects in this document may be described using terms typically associated with 5G or NR radio access technology (RAT), aspects of the present disclosure may be applied to other RATs, such as 3G RAT, 4G RAT, and / or RATs after 5G (e.g., 6G).

[0037] Figure 1 FIG. is an illustration of an example of a wireless network 100 in accordance with various aspects of the present disclosure. The wireless network 100 may be a 5G (NR) network and / or an LTE network, etc., or may include elements thereof. The wireless network 100 may include several base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with user equipment (UE) and may also be referred to as an NR BS, Node B, gNB, 5G Node B (NB), access point, transmission reception point (TRP), etc. Each BS may provide communication coverage for a specific geographical area. In 3GPP, the term "cell" may refer to the coverage area of a BS and / or the BS subsystem serving that coverage area, depending on the context in which the term is used.

[0038] The BS may provide communication coverage for macro cells, pico cells, femto cells, and / or another type of cell. A macro cell may cover a relatively large geographical area (e.g., with a radius of several kilometers) and may allow unconstrained access by UEs with a service subscription. A pico cell may cover a relatively small geographical area and may allow unconstrained access by UEs with a service subscription. A femto cell may cover a relatively small geographical area (e.g., a residence) and may allow constrained access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). The BS for a macro cell may be referred to as a macro BS. The BS for a pico cell may be referred to as a pico BS. The BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 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. The BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "Node B", "5G NB", and "cell" may be used interchangeably herein.

[0039] In some aspects, a cell may not have to be stationary, and the geographical area of a cell may move according to the location of a mobile BS. In some aspects, BSs may be interconnected with each other and / or interconnected to one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces such as direct physical connections or virtual networks, using any suitable transport network.

[0040] The wireless network 100 may also include relay stations. A relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send the transmission of the data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. In Figure 1 the example shown, the relay BS 110d may communicate with the macro BS 110a and the UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay BS may also be referred to as a relay station, a relay base station, a relay, etc.

[0041] The wireless network 100 may be a heterogeneous network including different types of BSs such as 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 impacts on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 watts).

[0042] The network controller 130 may be coupled to a set of BSs and may provide coordination and control of these BSs. The network controller 130 may communicate with the respective BSs via the backhaul. These BSs may also communicate with each other directly or indirectly via wireless or wired backhaul.

[0043] UE 120 (e.g., 120a, 120b, 120c) can be dispersed throughout the wireless network 100, and each UE can be stationary or mobile. The UE can also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. The 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, a camera, a gaming device, a netbook, a smartbook, a superbook, a medical device or equipment, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0044] Some UEs can be considered machine type communication (MTC) devices, or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags, which can communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node can provide connectivity to a network (e.g., a wide area network such as the Internet or a cellular network) or provide connectivity to the network via a wired or wireless communication link, for example. Some UEs can be considered Internet of Things (IoT) devices, and / or can be implemented as narrowband IoT (NB-IoT) devices. Some UEs can be considered customer premise equipment (CPE). The UE 120 can be included inside a housing that houses components of the UE 120, such as a processor component and / or a memory component. In some aspects, the processor component and the memory component can be coupled together. For example, the processor component (e.g., one or more processors) and the memory component (e.g., a memory) can be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0045] Generally, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific RAT and can operate on one or more frequencies. The RAT can also be referred to as a radio technology, an air interface, etc. The frequency can also be referred to as a carrier, a frequency channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks of different RATs. In some cases, an NR or 5G RAT network can be deployed.

[0046] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., communicate with each other without using the base station 110 as an intermediary). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols or vehicle-to-infrastructure (V2I) protocols), and / or mesh networks. In such a case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as performed by base station 110.

[0047] Devices of the wireless network 100 may communicate using the electromagnetic spectrum, which may be subdivided into various categories, bands, channels, etc. based on frequency or wavelength. For example, devices of the wireless network 100 may communicate using an operating band having a first frequency range (FR1) and / or may communicate using an operating band having a second frequency range (FR2), where the first frequency range (FR1) may span from 410 MHz to 7.125 GHz and the second frequency range (FR2) may span from 24.25 GHz to 52.6 GHz. The frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is generally referred to as the "sub-6 GHz band". Similarly, although different from the extremely high frequency (EHF) band (30 GHz - 300 GHz) identified by the International Telecommunication Union (ITU) as the "millimeter wave" band, FR2 is generally referred to as the "millimeter wave" band. Thus, unless specifically stated otherwise, it should be understood that if used herein, terms such as "sub-6 GHz" may broadly represent frequencies less than 6 GHz, frequencies within FR1, and / or mid-band frequencies (e.g., greater than 7.125 GHz). Similarly, unless specifically stated otherwise, it should be understood that if used herein, terms such as "millimeter wave" may broadly represent frequencies within the EHF band, frequencies within FR2, and / or mid-band frequencies (e.g., less than 24.25 GHz). It is contemplated that the frequencies included in FR1 and FR2 may be modified, and the techniques described herein apply to those modified frequency ranges.

[0048] As indicated above, Figure 1 is provided as an example. Other examples may be different from the example regarding Figure 1 described.

[0049] Figure 2FIG. 200 is a diagram illustrating an example 200 in which a base station 110 and a UE 120 are in communication in a wireless network 100 in accordance with various aspects of the present disclosure. The base station 110 may be equipped with T antennas 234a through 234t, and the UE 120 may be equipped with R antennas 252a through 252r, where generally T≥1 and R≥1.

[0050] At the base station 110, a transmit processor 220 may receive data for one or more UEs from a data source 212, select one or more modulation and coding schemes (MCSs) for the UE at least in part based on a channel quality indicator (CQI) received from each UE, process (e.g., encode and modulate) the data for the UE at least in part based on the selected MCS(s) for each 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)) and control information (e.g., CQI requests, grants, and / or upper layer signaling), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signal (CRS) or demodulation reference signal (DMRS)) and synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, control symbols, overhead symbols, and / or reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process its respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a through 232t may be transmitted via the T antennas 234a through 234t, respectively.

[0051] At the UE 120, antennas 252a through 252r may receive downlink signals from the base station 110 and / or other base stations and may provide the received signals to demodulators (DEMOD) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, down-convert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM) to obtain received symbols. The MIMO detector 256 may obtain the received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide the decoded data for the UE 120 to the data sink 260, and provide the decoded control information and system information to the controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine reference signal received power (RSRP) parameters, received signal strength indicator (RSSI) parameters, reference signal received quality (RSRQ) parameters, and / or channel quality indicator (CQI) parameters, etc. In some aspects, one or more components of the UE 120 may be included in the housing 284.

[0052] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in the core network. The network controller 130 may communicate with the base station 110 via the communication unit 294.

[0053] Antennas (e.g., antennas 234a through 234t and / or antennas 252a through 252r) may include one or more antenna panels, antenna groups, antenna element sets, and / or antenna arrays, etc., or may be included therein. The antenna panel, antenna group, antenna element set, and / or antenna array may include one or more antenna elements. The antenna panel, antenna group, antenna element set, and / or antenna array may include a coplanar antenna element set and / or a non-coplanar antenna element set. The antenna panel, antenna group, antenna element set, and / or antenna array may include antenna elements within a single housing and / or antenna elements within multiple housings. The antenna panel, antenna group, antenna element set, and / or antenna array may include one or more antenna elements coupled to one or more transmission and / or reception components (such as Figure 2 one or more components)

[0054] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from the data source 262 and control information from the controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI). 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 the TX MIMO processor 266 when applicable, further processed by the modulators 254a through 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to the base station 110. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 254) of the UE 120 may be included in the modem of the UE 120. In some aspects, the UE 120 includes a transceiver. The transceiver may include any combination of antennas 252, modulator and / or demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller / processor 280) and the memory 282 to perform aspects of any of the methods described herein, e.g., as referred to Figure 3-11 as described.

[0055] At the base station 110, the uplink signals from the UE 120 and other UEs may be received by the antennas 234, processed by the demodulator 232, detected by the MIMO detector 236 when applicable, and further processed by the receive processor 238 to obtain the decoded data and control information transmitted by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The base station 110 may include a scheduler 246 to schedule the UE 120 for downlink and / or uplink communication. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 232) of the base station 110 may be included in the modem of the base station 110. In some aspects, the base station 110 includes a transceiver. The transceiver may include any combination of antennas 234, modulator and / or demodulator 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and the memory 242 to perform aspects of any of the methods described herein, e.g., as referred to Figure 3-11 as described.

[0056] The controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 any other component(s) thereof may perform one or more techniques associated with SRS repetition configuration, as described in more detail elsewhere herein. For example, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 any other component(s) thereof may perform or direct the operation of, for example, Figure 10 process 1000, Figure 11 process 1100, and / or other processes as described herein. Memories 242 and 282 may store data and program code 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 (e.g., code and / or program code). For example, when the one or more instructions are executed (e.g., directly executed, or after compilation, conversion, and / or interpretation) by one or more processors of base station 110 and / or UE 120, the one or more processors, UE 120, and / or base station 110 may be caused to perform or direct the operation of, for example, Figure 10 process 1000, Figure 11 process 1100, and / or other processes as described herein. In some aspects, executing the instructions may include running the instructions, converting the instructions, compiling the instructions, and / or interpreting the instructions, etc.

[0057] In some aspects, UE 120 includes: means for receiving configuration information configuring an RS transmission with a repetition factor, where the configuration information indicates one or more parameters for the RS transmission, the one or more parameters including at least one of the following: a sequence hopping configuration associated with the RS transmission, a cyclic shift offset configuration associated with the RS transmission, or a frequency hopping configuration indicating subcarrier hopping across adjacent RS symbols; and / or means for performing the RS transmission using the repetition factor according to the configuration. The means for UE 120 to perform the operations described herein may include, for example, one or more of antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280, or memory 282.

[0058] In some aspects, UE 120 includes: means for determining a list of cyclic shift offsets based at least in part on an initial cyclic shift offset and a predefined sequence.

[0059] In some aspects, BS 110 includes: means for transmitting configuration information for configuring RS transmissions with a repetition factor, where the configuration information indicates one or more parameters for the RS transmission, and the one or more parameters include at least one of the following: a sequence hopping configuration associated with the RS transmission, a cyclic shift offset configuration associated with the RS transmission, or a frequency hopping configuration indicating subcarrier hopping across adjacent RS symbols; and / or means for receiving the RS transmission according to the configured repetition factor. The means for BS 110 to perform the operations described herein may include, for example, one or more of a transmit processor 220, a TX MIMO processor 230, a modulator 232, an antenna 234, a demodulator 232, a MIMO detector 236, a receive processor 238, a controller / processor 240, a memory 242, or a scheduler 246.

[0060] Although Figure 2 the boxes in are illustrated as different components, the functions described above with respect to these boxes can be implemented with a single hardware, software, or combined component or a combination of various components. For example, the functions described with respect to the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 can be performed by or under the control of the controller / processor 280.

[0061] As indicated above, Figure 2 is provided as an example. Other examples may be different from the example described with respect to Figure 2 described.

[0062] Figure 3 is a diagram illustrating an example 300 of an SRS resource set in accordance with various aspects of the present disclosure.

[0063] Base station 110 may configure UE 120 with one or more SRS resource sets to allocate resources for UE 120 to perform SRS transmissions. For example, the configuration of 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 indicated by reference numeral 305, the SRS resource set may include one or more resources (e.g., shown as SRS resources), and these resources may include time resources and / or frequency resources (e.g., time slots, symbols, resource blocks, periodicity of time resources, etc.).

[0064] As shown by reference numeral 310, the SRS resource may include one or more antenna ports on which the SRS is to be transmitted (e.g., transmitted in time-frequency resources). Thus, the configuration of the SRS resource set may indicate one or more time-frequency resources in which the SRS is to be transmitted, and may indicate one or more antenna ports on which the SRS is to be transmitted in those time-frequency resources. In some aspects, the configuration of the SRS resource set may indicate the use case for the SRS resource set (e.g., in the SRS-SetUse information element). For example, the SRS resource set may have use cases such as antenna switching, codebook, non-codebook, beam management, etc.

[0065] The antenna switching SRS resource set may be used to indicate the downlink CSI having reciprocity between the uplink and downlink channels. For example, when there is reciprocity between the uplink channel and the downlink channel, the base station 110 may use the antenna switching SRS (e.g., the SRS transmitted using the resources in the antenna switching SRS resource set) to obtain the downlink CSI (e.g., to determine the downlink precoder to be used for communicating with the UE 120).

[0066] When the base station 110 indicates the uplink precoder to the UE 120, the codebook SRS resource set may be used to indicate the uplink CSI. For example, when the base station 110 is configured to indicate the uplink precoder to the UE 120 (e.g., using a precoder codebook), the base station 110 may use the codebook SRS (e.g., the SRS transmitted using the resources in the codebook SRS resource set) to obtain the uplink CSI (e.g., to determine the uplink precoder to be indicated to the UE 120 and used by the UE 120 for communicating with the base station 110). In some aspects, at least for the codebook SRS, virtual ports with maximum transmit power (e.g., a combination of two or more antenna ports) may be supported.

[0067] When the UE 120 selects the uplink precoder (e.g., instead of the base station 110 indicating the uplink precoder to be used by the UE 120), the non-codebook SRS resource set may be used to indicate the uplink CSI. For example, when the UE 120 is configured to select the uplink precoder, the base station 110 may use the non-codebook SRS (e.g., the SRS transmitted using the resources in the non-codebook SRS resource set) to obtain the uplink CSI. In this case, the non-codebook SRS may be precoded using the precoder selected by the UE 120 (e.g., the precoder may be indicated to the base station 110).

[0068] The beam management SRS resource set may be used to indicate the CSI for millimeter wave communication.

[0069] The SRS resources can be configured to be periodic, semi-persistent (sometimes referred to as semi-persistent scheduling (SPS)), or aperiodic. The periodic SRS resources can be configured via a configuration message indicating the periodicity of the SRS resources (e.g., slot-level periodicity, where the SRS resources appear every Y slots) and the slot offset. In some cases, the periodic SRS resources can always be active and may not be dynamically activated or deactivated. The semi-persistent SRS resources can also be configured via a configuration message indicating the periodicity and slot offset for the semi-persistent SRS resources, and can be dynamically activated and deactivated (e.g., using DCI or a media access control (MAC) control element (CE) (MAC-CE)). The aperiodic SRS resources can be dynamically triggered, such as via DCI (e.g., UE-specific DCI or group-common DCI) or a MAC-CE.

[0070] In some aspects, the UE 120 can be configured with a mapping between SRS ports (e.g., antenna ports) and corresponding SRS resources. The UE 120 can transmit SRS on a specific SRS resource using the SRS ports indicated in the configuration. In some aspects, the SRS resources can span N contiguous symbols within a slot (e.g., where N is equal to 1, 2, or 4). The UE 120 can be configured with X SRS ports (e.g., where X ≤ 4). In some aspects, each of the X SRS ports can be mapped to a corresponding symbol of the SRS resource and be used to transmit SRS in that symbol.

[0071] As Figure 3 shown, in some aspects, different sets of SRS resources (e.g., with different use cases) indicated to the UE 120 can overlap (e.g., overlap in time, frequency, etc., such as in the same slot). For example, as indicated by reference numeral 315, a first set of SRS resources (e.g., shown as SRS resource set 1) is shown to have an antenna switching use case. As shown, this example antenna switching SRS resource set includes a first SRS resource (shown as SRS resource A) and a second SRS resource (shown as SRS resource B). Thus, the antenna switching SRS can be transmitted in SRS resource A (e.g., a first time-frequency resource) using antenna ports 0 and 1, and can be transmitted in SRS resource B (e.g., a second time-frequency resource) using antenna ports 2 and 3.

[0072] As indicated by reference numeral 320, a second SRS resource set (e.g., shown as SRS resource set 2) may be a codebook use case. As shown, this example codebook SRS resource set includes only a first SRS resource (shown as SRS resource A). Thus, the codebook SRS may be transmitted in SRS resource A (e.g., the first time-frequency resource) using antenna port 0 and antenna port 1. In this case, UE 120 may not transmit the codebook SRS in SRS resource B (e.g., the second time-frequency resource) using antenna port 2 and antenna port 3.

[0073] As indicated above, Figure 3 is provided as an example. Other examples may be different from the example Figure 3 described.

[0074] Figure 4 FIG. 400 is a diagram illustrating an example 400 of a repetition scheme for SRS in accordance with various aspects of the present disclosure. Example 400 shows a 4-symbol SRS. The SRS may be configured to occupy a number of symbols (e.g., orthogonal frequency division multiplexing (OFDM) symbols), such as 1 symbol, 2 symbols, 4 symbols, etc. The symbols to which the SRS is mapped are referred to herein as RS symbols or SRS symbols, and these terms may be used interchangeably. Example 400 shows an example where a time slot includes 14 OFDM symbols and 16 frequency domain subdivisions (where the frequency domain subdivisions are shown in the vertical direction). The frequency domain subdivisions may be subcarriers, groups of subcarriers, etc.

[0075] The SRS may be configured with a repetition factor. The repetition factor identifies the number of repetitions of the SRS to be transmitted in a given set of subcarriers. Reference numeral 405 shows an SRS with a repetition factor of 1. As shown, the SRS is transmitted in a first set of subcarriers for one symbol, then in a second set of subcarriers for one symbol, then in a third set of subcarriers for one symbol, then in a fourth set of subcarriers for one symbol. Reference numeral 410 shows an SRS with a repetition factor of 2. As shown, the SRS is transmitted in a first set of subcarriers for two symbols, then in a second set of subcarriers for two symbols. Reference numeral 415 shows an SRS with a repetition factor of 4. As shown, the SRS is transmitted in a first set of subcarriers for four symbols. Using a larger repetition factor improves the coverage for some UEs (such as cell-edge UEs). Using a smaller repetition factor increases the bandwidth that a single UE can probe.

[0076] The SRS is a reference signal that can be generated according to a sequence. The sequence can be a numerical sequence, such as a Zadoff Chu (ZC) sequence, but other sequences can also be used. The base station can configure different UEs to use different cyclic shifts (sometimes abbreviated as CS) for the sequence to increase the number of UEs that can use a given sequence. The cyclic shift identifies the starting position in the sequence. For example, the sequence [1 2 3 4] can be cyclically shifted to generate the sequences [1 2 3 4], [2 3 4 1], [3 4 1 2], and [4 1 2 3], thus increasing the number of UEs that can transmit the RS orthogonally from one to four. The cyclic shift can be regarded as a phase offset of the modulation constellation for transmitting the SRS. The cyclic shift α to be used by a given UE i can be identified by a cyclic shift offset . In the above example, the cyclically shifted sequences can be generated using cyclic shift offsets 0, 1, 2, and 3 respectively.

[0077] The implementation of SRS signaling with coverage enhancement based on repetition improves the coverage of cell-edge UEs, lower-capability UEs, etc. However, many aspects of the SRS configuration do not take into account the repetition factor, which restricts the flexibility and diversity of the SRS signaling. For example, in some deployments, the sequence of each RS symbol of the SRS is constrained to be the same for all RS symbols or different for all RS symbols. As another example, in some deployments, the cyclic shift offset can be constrained to be the same for all RS symbols of the SRS. As yet another example, the SRS can be constrained to use the same set of subcarriers for each RS symbol within a repetition group. These constraints reduce the diversity achievable in a wireless communication system, which reduces the number of UEs that can be configured to perform SRS signaling in a given system and reduces the accuracy and versatility of the SRS signaling configuration.

[0078] Some of the techniques and apparatuses described herein implement enhancements to the configuration of repetition-based SRS transmissions (e.g., SRS transmissions using a repetition factor). For example, some of the techniques and apparatuses described herein provide different sequences for different RS symbols to be configured for SRS transmission. As another example, the techniques and apparatuses described herein provide different cyclic shift offsets for different RS symbols of the SRS transmission. As yet another example, the techniques and apparatuses described herein provide different sets of subcarriers for the RS symbols within a repetition group. In this way, the flexibility and diversity of the SRS configuration are improved, which increases the number of UEs that can be configured to perform SRS signaling in a given system (thus improving multi-user SRS signaling), and improves the efficiency of channel estimation based at least in part on the SRS signaling.

[0079] As indicated above, Figure 4 is provided as an example. Other examples may be different from those regardingFigure 4 The described example.

[0080] Figure 5 FIG. 500 is a diagram illustrating an example 500 of signaling associated with SRS repetition configuration in accordance with various aspects of the present disclosure. As shown, example 500 includes UE 120 and BS 110.

[0081] As indicated by reference numeral 505, BS 110 may provide configuration information to UE 120. For example, BS 110 may provide configuration information via control signaling (such as radio resource control (RRC) signaling, etc.). As indicated by reference numeral 510, the configuration information may include information configuring SRS transmission. For example, the configuration information may include a set of information elements (IEs) (such as SRS resource IEs, etc.) that configure UE 120 to perform SRS transmission. In some aspects, the configuration information may include information indicating a repetition type. As used herein, the repetition type is a pattern indicating the configuration of the SRS associated with a repetition factor. For example, the repetition type may explicitly or implicitly indicate one or more parameters for SRS transmission, such as one or more of the parameters indicated by reference numerals 515, 520, 525, and 530.

[0082] As indicated by reference numeral 515, in some aspects, the configuration information may indicate a repetition factor. For example, the configuration information may include a parameter indicating the repetition factor. As another example, the repetition type of the configuration information may indicate the repetition factor. The repetition factor may indicate the number of repetitions for SRS transmission, as described elsewhere herein. In some aspects, the configuration information may include one or more other parameters regarding the SRS resource, such as information indicating the starting position of the SRS transmission, information indicating the number of symbols for the SRS transmission, etc.

[0083] As indicated by reference numeral 520, in some aspects, the configuration information may indicate a sequence hopping configuration. For example, the configuration information may include a parameter indicating the sequence hopping configuration. In some aspects, the sequence hopping configuration may indicate a set of sequences to be used for one or more RS symbols. In some aspects, the sequence hopping configuration may indicate the sequence order to be used for one or more RS symbols. In some aspects, the sequence hopping configuration may indicate a rule for determining the sequence to be used for an RS symbol based at least in part on the RS symbol index. In some aspects, the sequence hopping configuration may indicate a rule for determining the sequence to be used for an RS symbol based at least in part on a set of subcarriers associated with the RS symbol.

[0084] Figure 6FIG. 600 and 605 are diagrams illustrating examples 600 and 605 of sequences for an RS symbol set that are at least partially based on a sequence hopping configuration in accordance with various aspects of the present disclosure. Examples 600 and 605 illustrate RS resources in accordance with a sequence hopping configuration (such as the sequence hopping frequency configuration indicated by reference numeral 520). In example 600, the sequence hopping configuration indicates that the same sequence is to be used for RS symbols in the same subcarrier set, and different sequences may be used for RS symbols in different subcarrier sets. Thus, sequence 1 is used for an earlier RS symbol set in the first subcarrier set, and sequence 2 is used for a later RS symbol set in the second subcarrier set. In this case, the earlier RS symbol set and the later RS symbol set may be associated with a single SRS transmission having a repetition factor of 2.

[0085] In example 605, the sequence hopping configuration indicates that different sequences may be used for RS symbols in the same subcarrier set, and the same sequence may be used for RS symbols in different subcarrier sets. Thus, sequence 1 is used for the first RS symbol in the first subcarrier set, and sequence 2 is used for the second RS symbol in the first subcarrier set. In this case, the first subcarrier set (and the first RS symbol and the second RS symbol) may be associated with a single SRS transmission having a repetition factor of 2. Additionally, sequence 1 is used for the third RS symbol in the second subcarrier set, and sequence 2 is used for the fourth RS symbol in the second subcarrier set, where the third RS symbol and the fourth RS symbol are associated with the single SRS transmission having a repetition factor of 2.

[0086] In some aspects, the different sequences may include different types of sequences (e.g., one sequence may be a ZC sequence while another sequence may be a Gold sequence). In some aspects, the different sequences may include the same type of sequence with different root values such that different sequences of the same type are generated. Thus, two or more different sequences may be used for two or more RS symbols of an SRS transmission, which improves the diversity and efficiency of SRS signaling.

[0087] Return Figure 5, as indicated by reference numeral 525, in some aspects, the configuration information may indicate a cyclic shift offset configuration. For example, the configuration information may include a parameter indicating the cyclic shift offset configuration. In some aspects, the cyclic shift offset configuration may indicate how to determine a cyclic offset for one or more RS symbols of an SRS transmission. In some aspects, the cyclic shift offset configuration may indicate a list of cyclic shift offsets (e.g., via RRC signaling, etc.), and the UE 120 may apply the cyclic shift offset identified by the list to the RS symbols of the SRS transmission. In this case, if there are more RS symbols than the cyclic shift offsets in the list, the UE 120 may repeat the list when assigning cyclic shift offsets (e.g., may wrap around to the start of the list). In some aspects, the cyclic shift offset configuration may indicate a repetition factor and may indicate a list of cyclic shift offsets that varies according to the repetition factor. For example, for a repetition factor of 2, the parameter cyclicShiftList-n2 (cyclic shift list - n2) may indicate a SEQUENCE(SIZE(1.maxNrCSList - 1)) of INTEGER(0..7) (sequence (size (1.maxNrCSList - 1)) of integer (0..7)), and for a repetition factor of 4, the parameter cyclicShiftList-n4 (cyclic shift list - n4) may indicate a SEQUENCE(SIZE(1.maxNRCSlist - 1)) of INTEGER(0..11) (sequence (size (1.maxNRCSlist - 1)) of integer (0..11)).

[0088] In some aspects, the UE 120 may determine the cyclic shift offset configuration. For example, the UE 120 may receive information indicating a rule for determining a cyclic shift offset (and thus a cyclic shift) for a group of RS symbols. As used herein, a group of RS symbols is a set of RS symbols associated with a given repetition factor, such as the group indicated by reference numeral 610 in Figure 6 . In some aspects, the rule may indicate a predefined sequence of CS offsets, and the UE 120 may determine the cyclic shift offset for one or more groups of RS symbols according to the predefined sequence (e.g., the first CS offset in the predefined sequence is for the first group of RS symbols, the second CS offset in the predefined sequence is for the second group of RS symbols, and so on). In some aspects, the rule may indicate a first CS offset (e.g., X) and an offset for subsequent CS offsets (e.g., K), and the UE 120 may use the first CS offset and the offset to determine the CS offset for a group of RS symbols (e.g., X is for the first group of RS symbols, X + K is for the second group of RS symbols, X + 2K is for the third group of RS symbols, and so on).

[0089] In some aspects, a cyclic shift offset configuration may be associated with a maximum cyclic shift offset number. For example, the cyclic shift offset configuration may indicate a list of cyclic shift offsets including up to the maximum cyclic shift offset number. In some aspects, the maximum cyclic shift offset number may be at least partially based on whether group-based cyclic shift is applied. For example, the cyclic shift offset configuration may be associated with a first maximum cyclic shift offset number for a first repetition factor (where group-based cyclic shift is not applied) and a second maximum cyclic shift offset number for a second repetition factor (where group-based cyclic shift is applied). As another example, the cyclic shift offset configuration may indicate a modified maximum cyclic shift number at least partially based on configuration information (e.g., where the maximum number is modified relative to a baseline maximum number). Thereby, the cyclic shift offset configuration can ensure that there are sufficient cyclic shift offsets available for SRS transmission.

[0090] Figure 7 FIGS. 700, 705, and 710 are diagrams illustrating examples of SRS transmission using a cyclic shift offset configuration in accordance with various aspects of the present disclosure. In example 700, the cyclic shift offset configuration indicates that different cyclic shift offsets will be used for each RS symbol of an RS transmission. For example, the cyclic shift offset configuration may indicate a plurality of cyclic shift offsets corresponding to a plurality of RS symbols of an RS transmission.

[0091] In example 705, the cyclic shift offset configuration indicates that different cyclic shift offsets can be used for RS symbols in the same subcarrier set, and the same cyclic shift offset can be used for RS symbols having the same index in a repetition group in different subcarrier sets. Thus, CS offset 1 is used for the first RS symbol in the first subcarrier set, and CS offset 2 is used for the second RS symbol in the first subcarrier set. Additionally, CS offset 1 is used for the third RS symbol in the second subcarrier set, and CS offset 2 is used for the fourth RS symbol in the second subcarrier set, where the first RS symbol and the third RS symbol have index 0 in their respective repetition groups, and the third RS symbol and the fourth RS symbol have index 1 in their respective repetition groups.

[0092] In example 710, the cyclic shift offset configuration indicates that the same cyclic shift offset can be used for RS symbols in the same subcarrier set, and different cyclic shift offsets can be used for RS symbols in different subcarrier sets. Thus, CS offset 1 is used for the first and second RS symbols in the first subcarrier set, and CS offset 2 is used for the third and fourth RS symbols in the second subcarrier set.

[0093] Figure 8FIG. 800 and 805 are diagrams illustrating examples of SRS transmissions using cyclic shift offset configurations for partial frequency sounding SRS according to various aspects of the present disclosure. The SRS can be configured to perform full frequency sounding (e.g., where the RS resources of the SRS are adjacent in the frequency domain such that each frequency hop of the SRS is adjacent in frequency to the previous frequency hop) or partial frequency sounding (e.g., where the RS resources of the SRS are spaced apart from each other in the frequency domain such that each frequency hop of the SRS is separated in frequency from the previous frequency hop). Additionally, the partial frequency sounding configuration can be associated with a pattern that indicates the frequency resources for partial frequency sounding. For example, example 805 shows an example with a first pattern and a second pattern that are distinguishable from each other in frequency.

[0094] In example 800, the cyclic shift offset configuration indicates that a different set of cyclic shift offsets is to be used for full frequency sounding SRS transmissions than for partial frequency sounding SRS transmissions. For example, in example 800, a first set of CS offsets (here CS offsets 1 and 2, but the first set can include any number of CS offsets) is used for full frequency sounding, while a second set of CS offsets (here CS offsets 3 and 4, but the second set can include any number of CS offsets) is used for partial frequency sounding.

[0095] In example 805, the cyclic shift offset configuration indicates that a different set of cyclic shift offsets is to be used for a first partial frequency sounding SRS transmission than for a second partial frequency sounding SRS transmission. For example, in example 805, a first set of CS offsets (here CS offsets 1 and 2, but the first set can include any number of CS offsets) is used for the first partial frequency sounding SRS transmission, while a second set of CS offsets (here CS offsets 3 and 4, but the second set can include any number of CS offsets) is used for the second partial frequency sounding SRS transmission.

[0096] In some aspects, the cyclic shift offset configuration may be at least partially based on a function related to the time slot associated with the SRS transmission. For example, the cyclic shift offset configuration may indicate that the cyclic shift offset is different for different time slots. In some aspects, the cyclic shift offset configuration may identify a set of cyclic shift offsets corresponding to the respective time slots. For example, the first time slot may be configured with a first cyclic shift offset, the second time slot may be configured with a second cyclic shift offset, and so on. In some aspects, the cyclic shift offset configuration may be a function of the time slot number (such as the time slot number within a subframe). For example, the CS offset may be given by the time slot number, or may be given by modulo(time slot number, X), where X may be configured by UE 120, pre-configured, determined, signaled to UE 120 dynamically, and so on. In some aspects, the cyclic shift offset configuration may be signaled to UE 120 dynamically. For example, BS 110 may transmit information indicating the cyclic shift offset to be used for the time slot (e.g., via dynamic signaling, such as downlink control information or media access control signaling) for the time slot.

[0097] Return Figure 5 , as shown by reference numeral 530, in some aspects, the configuration information may indicate a frequency hopping configuration. For example, the configuration information may include a parameter indicating the frequency hopping configuration. The frequency hopping configuration may indicate subcarrier hopping across adjacent RS symbols. For example, the frequency hopping configuration may indicate that the RS transmission is to be performed in a first set of subcarriers for a first RS symbol, a second set of subcarriers for a second RS symbol, and so on. As another example, the frequency hopping configuration may indicate that the first RS symbol of a repetition group is to be transmitted on a first set of subcarriers and the second RS symbol of the repetition group is to be transmitted on a second set of subcarriers.

[0098] Figure 9 is a diagram illustrating an example 900 of SRS transmission using a frequency hopping configuration in accordance with various aspects of the present disclosure. In example 900, the frequency hopping configuration indicates that different subcarriers may be used for adjacent SRS symbols. Additionally, the frequency hopping configuration indicates that symbols with the same index of a repetition group may be transmitted using the same set of subcarriers. For example, the RS symbol shown by reference numeral 905 may be associated with the first index of its respective repetition group, and the RS symbol shown by reference numeral 910 may be associated with the second index of its respective repetition group. Thus, the RS symbol shown by reference numeral 905 is transmitted on a first set of subcarriers, and the RS symbol shown by reference numeral 910 is transmitted on a second set of subcarriers.

[0099] Return Figure 5, as indicated by reference numeral 535, the UE 120 may implement the configuration of SRS transmissions. For example, the UE 120 may identify RS resources for transmitting SRS transmissions. In some aspects, the UE 120 may determine one or more parameters, such as a repetition factor, a sequence hopping configuration, a cyclic shift offset configuration, a frequency hopping configuration, etc., at least in part based on the configuration information. In some aspects, the UE 120 may determine the one or more parameters at least in part based on a mode (such as a mode indicated by the repetition type of the configuration information). For example, different modes may be defined at least in part based on at least one of the following: a sequence hopping configuration, a cyclic shift offset configuration, a frequency hopping configuration, or one or more combinations thereof. The UE 120 may determine the one or more parameters at least in part based on the selected mode among different modes.

[0100] As indicated by reference numeral 540, the UE 120 may transmit an SRS transmission. For example, the UE 120 may perform an SRS transmission on the RS resources identified according to the configuration information. As indicated by reference numeral 545, the BS 110 may receive the SRS transmission. For example, the BS 110 may monitor the RS resources for the SRS transmission according to the one or more parameters configured for the UE 120. The BS 110 may determine channel information at least in part based on the RS resources. In this way, the versatility of SRS configuration and transmission is improved, and support for multi-user SRS transmissions with improved diversity is provided.

[0101] As indicated above, Figure 5-9 is provided as an example. Other examples may be different from the examples described with respect to Figure 5-9 which are described.

[0102] Figure 10 is a diagram illustrating an example process 1000 performed, for example, by a UE in accordance with various aspects of the present disclosure. The example process 1000 is an example in which a UE (e.g., UE 120) performs operations associated with SRS repetition configuration.

[0103] As Figure 10 shown, in some aspects, process 1000 may include: receiving configuration information configuring an RS transmission with a repetition factor, where the configuration information indicates one or more parameters for the RS transmission (block 1010). For example, the UE (e.g., using the receiving component 1202 depicted in Figure 12 may receive configuration information configuring an RS transmission with a repetition factor. The configuration information may indicate one or more parameters for the RS transmission, such as at least one of a sequence hopping configuration associated with the RS transmission, a cyclic shift offset configuration associated with the RS transmission, or a frequency hopping configuration indicating subcarrier hopping across adjacent RS symbols, as described above. In some aspects, the RS transmission is an SRS transmission.

[0104] like Figure 10 As further shown in FIG. 1 , in some aspects, process 1000 may include: performing RS transmission using a repetition factor according to a configuration (block 1020). For example, a UE (e.g., using Figure 12 The transmission component 1204 depicted in FIG. 1 may perform RS transmission using a repetition factor according to a configuration, as described above.

[0105] Process 1000 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.

[0106] In a first aspect, a sequence hopping configuration indicates that a first sequence is used for two or more RS symbols for RS transmission in a first set of subcarriers and a second sequence is used for two or more RS symbols for RS transmission in a second set of subcarriers.

[0107] In a second aspect, either alone or in combination with the first aspect, the sequence hopping configuration indicates that a first sequence is used for RS transmission of two or more RS symbols associated with a first symbol index in a repetition group, and the sequence hopping configuration indicates that a second sequence is used for RS transmission of two or more RS symbols associated with a second symbol index in a repetition group.

[0108] In a third aspect, alone or in combination with one or more of the first and second aspects, two or more RS symbols of the RS transmission associated with a first symbol index are transmitted on different sets of subcarriers.

[0109] In a fourth aspect, alone or in combination with one or more of the first to third aspects, two or more RS symbols of the RS transmission associated with the second symbol index are transmitted on different sets of subcarriers.

[0110] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the cyclic shift offset configuration indicates a plurality of cyclic shift offsets corresponding to a plurality of RS symbols of the RS transmission.

[0111] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the cyclic shift offset configuration indicates a first cyclic shift offset corresponding to a first RS codeword set of RS transmission and a second cyclic shift offset corresponding to a second RS codeword set of RS transmission.

[0112] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, a first set of RS symbols is associated with a first set of subcarriers and a second set of RS symbols is associated with a second set of subcarriers.

[0113] In an eighth aspect, either alone or in combination with one or more of the first to seventh aspects, a first RS symbol set is associated with a first symbol index, and a second RS symbol set is associated with a second symbol index.

[0114] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, two or more RS symbols associated with the first symbol index in an RS transmission are transmitted on different subcarrier sets.

[0115] In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, two or more RS symbols associated with the second symbol index in an RS transmission are transmitted on different subcarrier sets.

[0116] In an eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, a first RS symbol set is associated with a partial frequency sounding pattern, and a second RS symbol set is associated with a full frequency sounding pattern.

[0117] In a twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, a first RS symbol set is associated with a first partial frequency sounding pattern, and a second RS symbol set is associated with a second partial frequency sounding pattern.

[0118] In a thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, a cyclic shift offset configuration is at least partially based on a time slot associated with an RS transmission.

[0119] In a fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, a cyclic shift offset configuration indicates a cyclic shift offset based at least in part on a function of a time slot number related to a time slot associated with an RS transmission.

[0120] In a fifteenth aspect, either alone or in combination with one or more of the first to fourteenth aspects, a cyclic shift offset configuration indicates a list of cyclic shift offsets to be used for an RS transmission.

[0121] In a sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, a cyclic shift offset configuration indicates an initial cyclic shift offset, and process 1000 further includes: determining a list of cyclic shift offsets based at least in part on the initial cyclic shift offset and a predefined sequence.

[0122] In a seventeenth aspect, either alone or in combination with one or more of the first to sixteenth aspects, an RS transmission is associated with a modified maximum cyclic shift number based at least in part on configuration information indicating one or more parameters for the RS transmission.

[0123] In an eighteenth aspect, alone or in combination with one or more of the first to seventeenth aspects, a frequency hopping configuration indicates that a first subcarrier set is used for a first RS symbol in adjacent RS symbols and a second subcarrier set is used for a second RS symbol in adjacent RS symbols.

[0124] In a nineteenth aspect, alone or in combination with one or more of the first to eighteenth aspects, adjacent RS symbols include a first symbol group and a second symbol group, where the first RS symbol and the second RS symbol are respectively associated with a first symbol index and a second symbol index in the first symbol group, where a third RS symbol and a fourth RS symbol are respectively associated with the first symbol index and the second symbol index in the second symbol group, where the first subcarrier set is used for the third RS symbol, and where the second subcarrier set is used for the fourth RS symbol.

[0125] In a twentieth aspect, alone or in combination with one or more of the first to nineteenth aspects, configuration information indicates a mode, and the one or more parameters are defined according to the mode.

[0126] In a twenty - first aspect, alone or in combination with one or more of the first to twentieth aspects, configuration information indicates a repetition group associated with the one or more parameters.

[0127] Although Figure 10 illustrates example blocks of process 1000, in some aspects, process 1000 may include additional blocks, fewer blocks, different blocks, or blocks arranged differently compared to the blocks depicted in Figure 10 . Additionally or alternatively, two or more blocks of process 1000 may be executed in parallel.

[0128] Figure 11 is a diagram illustrating an example process 1100, such as performed by a base station, in accordance with various aspects of the present disclosure. Example process 1100 is an example where a base station (e.g., base station 110) performs operations associated with SRS repetition configuration.

[0129] As Figure 11 shown, in some aspects, process 1100 may include: transmitting configuration information that configures an RS transmission with a repetition factor, where the configuration information indicates one or more parameters for the RS transmission (block 1110). For example, a base station (e.g., using Figure 13The transmission component 1304 depicted in [the figure] can transmit configuration information for an RS transmission configured with a repetition factor, where the configuration information indicates one or more parameters for the RS transmission. The one or more parameters can include at least one of the following: a sequence hopping configuration associated with the RS transmission, a cyclic shift offset configuration associated with the RS transmission, or a frequency hopping configuration indicating subcarrier hopping across adjacent RS symbols, as described above. In some aspects, the RS transmission is an SRS transmission.

[0130] As Figure 11 further shown in [the figure], in some aspects, process 1100 can include: receiving an RS transmission according to a configuration using a repetition factor (block 1120). For example, a base station (e.g., using Figure 13 the receiving component 1302 depicted in [the figure]) can receive an RS transmission according to a configuration using a repetition factor, as described above.

[0131] Process 1100 can 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 in this document.

[0132] In a first aspect, the sequence hopping configuration indicates that a first sequence is used for two or more RS symbols of an RS transmission in a first subcarrier set and a second sequence is used for two or more RS symbols of an RS transmission in a second subcarrier set.

[0133] In a second aspect, separately or in combination with the first aspect, the sequence hopping configuration indicates that a first sequence is used for two or more RS symbols associated with a first symbol index in a repetition group of an RS transmission, and the sequence hopping configuration indicates that a second sequence is used for two or more RS symbols associated with a second symbol index in the repetition group of the RS transmission.

[0134] In a third aspect, separately or in combination with one or more of the first and second aspects, two or more RS symbols associated with a first symbol index of an RS transmission are transmitted on different subcarrier sets.

[0135] In a fourth aspect, separately or in combination with one or more of the first to third aspects, two or more RS symbols associated with a second symbol index of an RS transmission are transmitted on different subcarrier sets.

[0136] In a fifth aspect, separately or in combination with one or more of the first to fourth aspects, the cyclic shift offset configuration indicates a plurality of cyclic shift offsets corresponding to a plurality of RS symbols of an RS transmission.

[0137] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the cyclic shift offset configuration indicates a first cyclic shift offset corresponding to a first set of RS symbols of the RS transmission and a second cyclic shift offset corresponding to a second set of RS symbols of the RS transmission.

[0138] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, the first set of RS symbols is associated with a first set of subcarriers, and the second set of RS symbols is associated with a second set of subcarriers.

[0139] In an eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the first set of RS symbols is associated with a first symbol index, and the second set of RS symbols is associated with a second symbol index.

[0140] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, two or more RS symbols of the RS transmission associated with the first symbol index are transmitted on different sets of subcarriers.

[0141] In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, two or more RS symbols of the RS transmission associated with the second symbol index are transmitted on different sets of subcarriers.

[0142] In an eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, the first set of RS symbols is associated with a partial frequency sounding configuration, and the second set of RS symbols is associated with a full frequency sounding configuration.

[0143] In a twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, the first set of RS symbols is associated with a first partial frequency sounding configuration, and the second set of RS symbols is associated with a second partial frequency sounding configuration.

[0144] In a thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, the cyclic shift offset configuration is at least partially based on the time slot associated with the RS transmission.

[0145] In a fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, the cyclic shift offset configuration indicates the cyclic shift offset based at least in part on a function of the time slot number related to the time slot associated with the RS transmission.

[0146] In a fifteenth aspect, either alone or in combination with one or more of the first to fourteenth aspects, the cyclic shift offset configuration indicates a list of cyclic shift offsets to be used for the RS transmission.

[0147] In a sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, a cyclic shift offset configuration indicates an initial cyclic shift offset, and a list of cyclic shift offsets is defined at least in part based on the initial cyclic shift offset and a predefined sequence.

[0148] In a seventeenth aspect, either alone or in combination with one or more of the first to sixteenth aspects, an RS transmission is associated with a modified maximum cyclic shift number based at least in part on configuration information indicating the one or more parameters for the RS transmission.

[0149] In an eighteenth aspect, either alone or in combination with one or more of the first to seventeenth aspects, a frequency hopping configuration indicates that a first subcarrier set is used for a first RS symbol in adjacent RS symbols and a second subcarrier set is used for a second RS symbol in adjacent RS symbols.

[0150] In a nineteenth aspect, either alone or in combination with one or more of the first to eighteenth aspects, adjacent RS symbols include a first symbol group and a second symbol group, where the first RS symbol and the second RS symbol are associated with a first symbol index and a second symbol index in the first symbol group respectively, where a third RS symbol and a fourth RS symbol are associated with the first symbol index and the second symbol index in the second symbol group respectively, where the first subcarrier set is used for the third RS symbol, and where the second subcarrier set is used for the fourth RS symbol.

[0151] In a twentieth aspect, either alone or in combination with one or more of the first to nineteenth aspects, the configuration information indicates a mode, and the one or more parameters are defined according to the mode.

[0152] In a twenty - first aspect, either alone or in combination with one or more of the first to twentieth aspects, the configuration information indicates a repetition group associated with the one or more parameters.

[0153] Although Figure 11 example blocks of process 1100 are shown, in some aspects, process 1100 may include additional blocks, fewer blocks, different blocks, or blocks arranged differently compared to the blocks depicted in Figure 11 Additionally or alternatively, two or more blocks of process 1100 may be executed in parallel.

[0154] Figure 12FIG. 0 is a block diagram of an example device 1200 for wireless communication in accordance with various aspects of the present disclosure. The device 1200 can be a UE, or the UE can include the device 1200. In some aspects, the device 1200 includes a receiving component 1202 and a transmitting component 1204, which can be in communication with each other (e.g., via one or more buses and / or one or more other components). As shown, the device 1200 can use the receiving component 1202 and the transmitting component 1204 to communicate with another device 1206 (such as a UE, a base station, or another wireless communication device). As further shown, the device 1200 can include a determining component 1208, etc.

[0155] In some aspects, the device 1200 can be configured to perform one or more operations described herein in connection with Figure 4-9 Additional or alternative, the device 1200 can be configured to perform one or more processes described herein (such as Figure 10 process 1000) or a combination thereof. In some aspects, the device 1200 and / or Figure 12 one or more components shown therein can include one or more components of the UE described above in connection with Figure 2 Additional or alternative, Figure 12 one or more components shown therein can be implemented within one or more components described above in connection with Figure 2 Additional or alternative, one or more components in the set of components can be implemented at least in part as software stored in a memory. For example, a component (or a part of a component) can be implemented as instructions or code stored in a non-transitory computer-readable medium and can be executed by a controller or a processor to perform the functions or operations of the component.

[0156] The receiving component 1202 can receive communications (such as reference signals, control information, data communications, or a combination thereof) from the device 1206. The receiving component 1202 can provide the received communications to one or more other components of the device 1200. In some aspects, the receiving component 1202 can perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) on the received communications and can provide the processed signals to one or more other components of the device 1206. In some aspects, the receiving component 1202 can include one or more antennas, demodulators, MIMO detectors, receiving processors, controllers / processors, memories, or a combination thereof of the UE described above in connection with Figure 2

[0157] The transmission component 1204 may transmit communications (such as reference signals, control information, data communications, or combinations thereof) to the device 1206. In some aspects, one or more other components of the device 1206 may generate communications and may provide the generated communications to the transmission component 1204 for transmission to the device 1206. In some aspects, the transmission component 1204 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or coding, etc.) on the generated communications and may transmit the processed signals to the device 1206. In some aspects, the transmission component 1204 may include one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the UE described above in conjunction with Figure 2 the components described. In some aspects, the transmission component 1204 may be co-located with the receiving component 1202 in a transceiver.

[0158] The receiving component 1202 may receive configuration information configuring an RS transmission with a repetition factor, where the configuration information indicates one or more parameters for the RS transmission, and the one or more parameters include at least one of the following: a sequence hopping configuration associated with the RS transmission, a cyclic shift offset configuration associated with the RS transmission, or a frequency hopping configuration indicating subcarrier hopping across adjacent RS symbols. The transmission component 1204 may perform the RS transmission using the repetition factor according to the configuration. The determination component 1208 may determine or implement the one or more parameters at least partially based on the configuration information.

[0159] Figure 12 The number and arrangement of the components shown in are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components compared to those shown in Figure 12 In addition, Figure 12 two or more of the components shown in may be implemented within a single component, or Figure 12 a single component shown in may be implemented as multiple distributed components. Additionally or alternatively, Figure 12 a set of components (one or more components) shown in may perform one or more functions described as being performed by Figure 12 another set of components shown in.

[0160] Figure 13FIG. is a block diagram of an example device 1300 for wireless communication in accordance with various aspects of the present disclosure. Device 1300 may be a base station, or a base station may include device 1300. In some aspects, device 1300 includes a receiving component 1302 and a transmitting component 1304, which may be in communication with each other (e.g., via one or more buses and / or one or more other components). As shown, device 1300 may use receiving component 1302 and transmitting component 1304 to communicate with another device 136 (such as a UE, a base station, or another wireless communication device). As further shown, device 1300 may include a configuration component 1308 and so on.

[0161] In some aspects, device 1300 may be configured to perform one or more operations described herein in connection with Figure 4-9 Additional or alternative, device 1300 may be configured to perform one or more processes described herein (such as Figure 11 process 1100) or a combination thereof. In some aspects, device 1300 and / or Figure 13 one or more components shown in may include one or more components of the base station described above in connection with Figure 2 Additional or alternative, Figure 13 one or more components shown in may be implemented within one or more components described above in connection with Figure 2 Additional or alternative, one or more components in this set of components may be implemented at least in part as software stored in a memory. For example, a component (or a part of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and may be executed by a controller or a processor to perform the functions or operations of the component.

[0162] Receiving component 1302 may receive communications (such as reference signals, control information, data communications, or a combination thereof) from device 1306. Receiving component 1302 may provide the received communications to one or more other components of device 1300. In some aspects, receiving component 1302 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) on the received communications and may provide the processed signals to one or more other components of device 1306. In some aspects, receiving component 1302 may include one or more antennas, demodulators, MIMO detectors, receiving processors, controllers / processors, memories, or a combination thereof of the base station described above in connection with Figure 2

[0163] The transmission component 1304 may transmit communications (such as reference signals, control information, data communications, or combinations thereof) to the device 1306. In some aspects, one or more other components of the device 1306 may generate communications and may provide the generated communications to the transmission component 1304 for transmission to the device 1306. In some aspects, the transmission component 1304 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or coding, etc.) on the generated communications, and may transmit the processed signals to the device 1306. In some aspects, the transmission component 1304 may include one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the base station described above in conjunction with Figure 2 In some aspects, the transmission component 1304 may be co-located with the receiving component 1302 in a transceiver.

[0164] The transmission component 1304 may transmit configuration information that configures an RS transmission with a repetition factor, where the configuration information indicates one or more parameters for the RS transmission, and the one or more parameters include at least one of the following: a sequence hopping configuration associated with the RS transmission, a cyclic shift offset configuration associated with the RS transmission, or a frequency hopping configuration indicating subcarrier hopping across adjacent RS symbols. The receiving component 1302 may receive the RS transmission according to the configuration using the repetition factor. The configuration component 1308 may determine the configuration information and / or cause the transmission component 1304 to transmit the configuration information.

[0165] Figure 13 The number and arrangement of the components shown in are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components compared to those shown in Figure 13 In addition, Figure 13 Two or more of the components shown in may be implemented within a single component, or Figure 13 a single component shown in may be implemented as multiple distributed components. Additionally or alternatively, Figure 13 a set of components (one or more components) shown in may perform one or more functions described as being performed by Figure 13 another set of components shown in.

[0166] An overview of some aspects of the present disclosure is provided below:

[0167] Aspect 1: A wireless communication method performed by a user equipment (UE), comprising: receiving configuration information configuring a reference signal (RS) transmission with a repetition factor, wherein the configuration information indicates one or more parameters for the RS transmission, the one or more parameters including at least one of the following: a sequence hopping configuration associated with the RS transmission, a cyclic shift offset configuration associated with the RS transmission, or a frequency hopping configuration indicating subcarrier hopping across adjacent RS symbols; and performing the RS transmission using the repetition factor according to the configuration.

[0168] Aspect 2: The method of aspect 1, wherein the sequence hopping configuration indicates that a first sequence is used for two or more RS symbols of the RS transmission in a first subcarrier set and a second sequence is used for two or more RS symbols of the RS transmission in a second subcarrier set.

[0169] Aspect 3: The method of aspect 1, wherein the sequence hopping configuration indicates that a first sequence is used for two or more RS symbols associated with a first symbol index in a repetition group of the RS transmission, and wherein the sequence hopping configuration indicates that a second sequence is used for two or more RS symbols associated with a second symbol index in the repetition group of the RS transmission.

[0170] Aspect 4: The method of aspect 3, wherein the two or more RS symbols associated with the first symbol index of the RS transmission are transmitted on different subcarrier sets.

[0171] Aspect 5: The method of aspect 3, wherein the two or more RS symbols associated with the second symbol index of the RS transmission are transmitted on different subcarrier sets.

[0172] Aspect 6: The method of any one of aspects 1 - 5, wherein the cyclic shift offset configuration indicates a plurality of cyclic shift offsets corresponding to a plurality of RS symbols of the RS transmission.

[0173] Aspect 7: The method of any one of aspects 1 - 5, wherein the cyclic shift offset configuration indicates a first cyclic shift offset corresponding to a first set of RS symbols of the RS transmission and a second cyclic shift offset corresponding to a second set of RS symbols of the RS transmission.

[0174] Aspect 8: The method of aspect 7, wherein the first set of RS symbols is associated with a first subcarrier set, and the second set of RS symbols is associated with a second subcarrier set.

[0175] Aspect 9: The method of aspect 7, wherein the first set of RS symbols is associated with a first symbol index, and the second set of RS symbols is associated with a second symbol index.

[0176] Aspect 10: The method of aspect 9, wherein two or more RS symbols associated with the first symbol index of the RS transmission are transmitted on different subcarrier sets.

[0177] Aspect 11: The method of aspect 9, wherein two or more RS symbols associated with the second symbol index of the RS transmission are transmitted on different subcarrier sets.

[0178] Aspect 12: The method of aspect 7, wherein the first RS symbol set is associated with a partial frequency sounding pattern, and the second RS symbol set is associated with a full frequency sounding pattern.

[0179] Aspect 13: The method of aspect 7, wherein the first RS symbol set is associated with a first partial frequency sounding pattern, and the second RS symbol set is associated with a second partial frequency sounding pattern.

[0180] Aspect 14: The method of any one of aspects 1-13, wherein the cyclic shift offset configuration is at least partially based on the time slot associated with the RS transmission.

[0181] Aspect 15: The method of any one of aspects 1-14, wherein the cyclic shift offset configuration indicates the cyclic shift offset based at least in part on a function involving the time slot number of the time slot associated with the RS transmission.

[0182] Aspect 16: The method of any one of aspects 1-15, wherein the cyclic shift offset configuration indicates a list of cyclic shift offsets to be used for the RS transmission.

[0183] Aspect 17: The method of any one of aspects 1-16, wherein the cyclic shift offset configuration indicates an initial cyclic shift offset, and wherein the method further comprises: determining a list of cyclic shift offsets at least in part based on the initial cyclic shift offset and a predefined sequence.

[0184] Aspect 18: The method of any one of aspects 1-17, wherein the RS transmission is at least partially associated with a modified maximum cyclic shift number based on the configuration information indicating the one or more parameters for the RS transmission.

[0185] Aspect 19: The method of any one of aspects 1-18, wherein the frequency hopping configuration indicates that a first subcarrier set is used for a first RS symbol among the adjacent RS symbols and a second subcarrier set is used for a second RS symbol among the adjacent RS symbols.

[0186] Aspect 20: The method of aspect 19, wherein the adjacent RS symbols include a first symbol group and a second symbol group, wherein the first RS symbol and the second RS symbol are respectively associated with a first symbol index and a second symbol index in the first symbol group, wherein a third RS symbol and a fourth RS symbol are respectively associated with the first symbol index and the second symbol index in the second symbol group, wherein the first subcarrier set is used for the third RS symbol, and wherein the second subcarrier set is used for the fourth RS symbol.

[0187] Aspect 21: The method of any one of aspects 1-20, wherein the configuration information indicates a mode, and wherein the one or more parameters are defined according to the mode.

[0188] Aspect 22: The method of any one of aspects 1-21, wherein the configuration information indicates a repetition group associated with the one or more parameters.

[0189] Aspect 23: A wireless communication method performed by a base station, comprising: transmitting configuration information that configures a reference signal (RS) transmission with a repetition factor, wherein the configuration information indicates one or more parameters for the RS transmission, the one or more parameters including at least one of the following: a sequence hopping configuration associated with the RS transmission, a cyclic shift offset configuration associated with the RS transmission, or a frequency hopping configuration indicating subcarrier hopping across adjacent RS symbols; and receiving the RS transmission using the repetition factor according to the configuration.

[0190] Aspect 24: The method of aspect 23, wherein the sequence hopping configuration indicates that a first sequence is used for two or more RS symbols of the RS transmission in a first subcarrier set and a second sequence is used for two or more RS symbols of the RS transmission in a second subcarrier set.

[0191] Aspect 25: The method of aspect 23, wherein the sequence hopping configuration indicates that a first sequence is used for two or more RS symbols of the RS transmission associated with a first symbol index in a repetition group, and wherein the sequence hopping configuration indicates that a second sequence is used for two or more RS symbols of the RS transmission associated with a second symbol index in the repetition group.

[0192] Aspect 26: The method of aspect 25, wherein two or more RS symbols of the RS transmission associated with the first symbol index are transmitted on different subcarrier sets.

[0193] Aspect 27: The method of aspect 25, wherein two or more RS symbols of the RS transmission associated with the second symbol index are transmitted on different subcarrier sets.

[0194] Aspect 28: The method as in any one of Aspects 23-27, wherein the cyclic shift offset configuration indicates a plurality of cyclic shift offsets corresponding to a plurality of RS symbols of the RS transmission.

[0195] Aspect 29: The method as in any one of Aspects 23-28, wherein the cyclic shift offset configuration indicates a first cyclic shift offset corresponding to a first set of RS symbols of the RS transmission and a second cyclic shift offset corresponding to a second set of RS symbols of the RS transmission.

[0196] Aspect 30: The method as in Aspect 29, wherein the first set of RS symbols is associated with a first set of subcarriers, and the second set of RS symbols is associated with a second set of subcarriers.

[0197] Aspect 31: The method as in Aspect 29, wherein the first set of RS symbols is associated with a first symbol index, and the second set of RS symbols is associated with a second symbol index.

[0198] Aspect 32: The method as in Aspect 31, wherein two or more RS symbols of the RS transmission associated with the first symbol index are transmitted on different sets of subcarriers.

[0199] Aspect 33: The method as in Aspect 31, wherein two or more RS symbols of the RS transmission associated with the second symbol index are transmitted on different sets of subcarriers.

[0200] Aspect 34: The method as in Aspect 29, wherein the first set of RS symbols is associated with a partial frequency sounding configuration, and the second set of RS symbols is associated with a full frequency sounding configuration.

[0201] Aspect 35: The method as in Aspect 29, wherein the first set of RS symbols is associated with a first partial frequency sounding configuration, and the second set of RS symbols is associated with a second partial frequency sounding configuration.

[0202] Aspect 36: The method as in any one of Aspects 23-35, wherein the cyclic shift offset configuration is at least partially based on a time slot associated with the RS transmission.

[0203] Aspect 37: The method as in any one of Aspects 23-36, wherein the cyclic shift offset configuration indicates a cyclic shift offset based at least partially on a function of a time slot number related to the time slot associated with the RS transmission.

[0204] Aspect 38: The method as in any one of Aspects 23-37, wherein the cyclic shift offset configuration indicates a list of cyclic shift offsets to be used for the RS transmission.

[0205] Aspect 39: A method as in any one of aspects 23 - 28, wherein the cyclic shift offset configuration indicates an initial cyclic shift offset, and wherein the list of cyclic shift offsets is defined at least in part based on the initial cyclic shift offset and a predefined sequence.

[0206] Aspect 40: A method as in any one of aspects 23 - 39, wherein the RS transmission is associated with a modified maximum cyclic shift number based at least in part on the configuration information indicating the one or more parameters for the RS transmission.

[0207] Aspect 41: A method as in any one of aspects 23 - 40, wherein the frequency hopping configuration indicates that a first sub - carrier set is used for a first RS symbol in the adjacent RS symbols and a second sub - carrier set is used for a second RS symbol in the adjacent RS symbols.

[0208] Aspect 42: The method as in aspect 41, wherein the adjacent RS symbols include a first symbol group and a second symbol group, wherein the first RS symbol and the second RS symbol are respectively associated with a first symbol index and a second symbol index in the first symbol group, wherein a third RS symbol and a fourth RS symbol are respectively associated with the first symbol index and the second symbol index in the second symbol group, wherein the first sub - carrier set is used for the third RS symbol, and wherein the second sub - carrier set is used for the fourth RS symbol.

[0209] Aspect 43: A method as in any one of aspects 23 - 42, wherein the configuration information indicates a mode, and wherein the one or more parameters are defined according to the mode.

[0210] Aspect 44: A method as in any one of aspects 23 - 43, wherein the configuration information indicates a repetition group associated with the one or more parameters.

[0211] Aspect 45: An apparatus for wireless communication at a device, comprising: a processor, a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the device to perform a method as in one or more of aspects 1 - 22.

[0212] Aspect 46: A device for wireless communication, comprising: a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform a method as in one or more of aspects 1 - 22.

[0213] Aspect 47: A device for wireless communication, comprising: at least one means for performing a method as in one or more of aspects 1 - 22.

[0214] Aspect 48: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform a method of one or more of Aspects 1-22.

[0215] Aspect 49: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set including one or more instructions that, when executed by one or more processors of a device, cause the device to perform a method of one or more of Aspects 1-22.

[0216] Aspect 50: An apparatus for wireless communication at a device, including: a processor, a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method of one or more of Aspects 23-44.

[0217] Aspect 51: A device for wireless communication, including: a memory and one or more processors coupled to the memory, the memory and the one or more processors configured to perform a method of one or more of Aspects 23-44.

[0218] Aspect 52: A device for wireless communication, including: at least one means for performing a method of one or more of Aspects 23-44.

[0219] Aspect 53: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform a method of one or more of Aspects 23-44.

[0220] Aspect 54: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set including one or more instructions that, when executed by one or more processors of a device, cause the device to perform a method of one or more of Aspects 23-44.

[0221] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired by practice of the aspects.

[0222] As used herein, the term "component" is intended to be broadly construed as a combination of hardware and / or hardware and software. "Software" shall be broadly construed to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and / or functions, etc., whether referred to in terms of software, firmware, middleware, microcode, hardware description language, or otherwise. As used herein, a processor is implemented with hardware and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein may be implemented in different forms of hardware and / or a combination of hardware and software. The actual specific control hardware or software code used to implement these systems and / or methods does not limit the aspects. Thus, the operation and behavior of these systems and / or methods are described herein without reference to specific software code - understanding that software and hardware can be designed to implement these systems and / or methods at least in part based on the description herein.

[0223] As used herein, depending on the context, meeting a threshold may mean a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and so on.

[0224] Although specific feature combinations are recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of the aspects. In fact, many of these features may be combined in ways not specifically recited in the claims and / or not disclosed in the specification. Although each of the dependent claims listed below may directly depend on only one claim, the disclosure of the aspects includes each dependent claim in combination with each other claim in this set of claims. As used herein, a phrase that recites "at least one of" a list of items means any combination of these items, including a single member. As an example, "at least one of a, b, or c" is intended to cover: a, b, c, a - b, a - c, b - c, and a - b - c, as well as any combination with multiple identical elements (e.g., a - a, a - a - a, a - a - b, a - a - c, a - b - b, a - c - c, b - b, b - b - b, b - b - c, c - c, and c - c - c, or any other ordering of a, b, and c).

[0225] Elements, acts, or instructions used herein should not be construed as critical or essential, unless expressly described as such. Also, as used herein, the articles "a" and "an" are intended to include one or more items and may be used interchangeably with "one or more." Additionally, as used herein, the article "the" is intended to include one or more items referenced in conjunction with the article "the" and may be used interchangeably with "one or more." Further, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, unrelated items, or a combination of related and unrelated items) and may be used interchangeably with "one or more." Where only one item is intended, the phrase "only one" or similar language is used. Also, as used herein, the terms "having," "containing," "including," etc. are intended to be open-ended terms. Additionally, the phrase "based on" is intended to mean "at least partially based on," unless expressly stated otherwise. Also, as used herein, the term "or" when used in a series is intended to be inclusive and may be used interchangeably with "and / or," unless expressly stated otherwise (e.g., when used in conjunction with "any of" or "only one of").

Claims

1. A user equipment (UE) for wireless communication, comprising: a memory; and one or more processors coupled to the memory and configured to: receive configuration information configuring a reference signal (RS) transmission with a repetition factor, wherein the configuration information indicates one or more parameters for the RS transmission, the one or more parameters including a cyclic shift offset configuration associated with the RS transmission, and wherein the cyclic shift offset configuration indicates a cyclic shift offset based at least in part on a function of a time slot number related to a time slot associated with the RS transmission; and perform the RS transmission according to the configuration using the repetition factor.

2. The UE according to claim 1, wherein the one or more parameters for the RS transmission include a sequence hopping configuration associated with the RS transmission, and wherein, The sequence hopping configuration indicates that a first sequence is used for two or more RS symbols of the RS transmission in a first subcarrier set and a second sequence is used for two or more RS symbols of the RS transmission in a second subcarrier set.

3. The UE according to claim 2, wherein the sequence hopping configuration indicates that a first sequence is used for two or more RS symbols associated with a first symbol index in a repetition group of the RS transmission, and wherein the sequence hopping configuration indicates that a second sequence is used for two or more RS symbols associated with a second symbol index in the repetition group of the RS transmission.

4. The UE according to claim 3, wherein the two or more RS symbols associated with the first symbol index of the RS transmission are transmitted on different subcarrier sets.

5. The UE according to claim 3, wherein the two or more RS symbols associated with the second symbol index of the RS transmission are transmitted on different subcarrier sets.

6. The UE according to claim 1, wherein the cyclic shift offset configuration indicates a plurality of cyclic shift offsets corresponding to a plurality of RS symbols of the RS transmission.

7. The UE according to claim 1, wherein the cyclic shift offset configuration indicates a first cyclic shift offset corresponding to a first set of RS symbols of the RS transmission and a second cyclic shift offset corresponding to a second set of RS symbols of the RS transmission.

8. The UE according to claim 7, wherein the first set of RS symbols is associated with a first subcarrier set, and the second set of RS symbols is associated with a second subcarrier set.

9. The UE according to claim 7, wherein the first set of RS symbols is associated with a first symbol index, and the second set of RS symbols is associated with a second symbol index.

10. The UE according to claim 9, wherein the two or more RS symbols associated with the first symbol index of the RS transmission are transmitted on different subcarrier sets.

11. The UE according to claim 9, wherein the two or more RS symbols associated with the second symbol index of the RS transmission are transmitted on different subcarrier sets.

12. The UE according to claim 7, wherein the first set of RS symbols is associated with a partial frequency sounding mode, and the second set of RS symbols is associated with a full frequency sounding mode.

13. The UE according to claim 7, wherein the first RS symbol set is associated with a first partial frequency sounding pattern, and the second RS symbol set is associated with a second partial frequency sounding pattern.

14. The UE according to claim 1, wherein the cyclic shift offset configuration is at least partially based on a time slot associated with the RS transmission.

15. The UE according to claim 1, wherein the cyclic shift offset configuration indicates a list of cyclic shift offsets to be used for the RS transmission.

16. The UE according to claim 1, wherein the cyclic shift offset configuration indicates an initial cyclic shift offset, and wherein the one or more processors are configured to: Determine a list of cyclic shift offsets at least partially based on the initial cyclic shift offset and a predefined sequence.

17. The UE according to claim 1, wherein the RS transmission is associated with a modified maximum cyclic shift number at least partially based on the configuration information indicating the one or more parameters for the RS transmission.

18. The UE according to claim 1, wherein the one or more parameters for the RS transmission include a frequency hopping configuration indicating sub - carrier hopping across adjacent RS symbols, and wherein, The frequency hopping configuration indicates that a first set of subcarriers is used for a first RS symbol among the adjacent RS symbols and a second set of subcarriers is used for a second RS symbol among the adjacent RS symbols.

19. The UE according to claim 18, wherein the adjacent RS symbols include a first symbol group and a second symbol group, wherein the first RS symbol and the second RS symbol are associated with a first symbol index and a second symbol index in the first symbol group respectively, wherein a third RS symbol and a fourth RS symbol are associated with the first symbol index and the second symbol index in the second symbol group respectively, wherein the first set of subcarriers is used for the third RS symbol, and wherein the second set of subcarriers is used for the fourth RS symbol.

20. The UE according to claim 1, wherein the configuration information indicates a mode, and wherein the one or more parameters are defined according to the mode.

21. The UE according to claim 1, wherein the configuration information indicates a repetition group associated with the one or more parameters.

22. A network entity for wireless communication, comprising: A memory; And One or more processors, the one or more processors being coupled to the memory and configured to: Transmit configuration information configuring a reference signal (RS) transmission with a repetition factor, wherein the configuration information indicates one or more parameters for the RS transmission, the one or more parameters including a cyclic shift offset configuration associated with the RS transmission, And wherein the cyclic shift offset configuration indicates a cyclic shift offset at least partially based on a function of a time slot number related to a time slot associated with the RS transmission; And Receive the RS transmission according to the configuration using the repetition factor.

23. The network entity according to claim 22, wherein the one or more parameters for the RS transmission include a sequence hopping configuration associated with the RS transmission, and wherein, The sequence hopping configuration indicates that a first sequence is used for two or more RS symbols of the RS transmission in a first set of subcarriers and a second sequence is used for two or more RS symbols of the RS transmission in a second set of subcarriers.

24. The network entity according to claim 22, wherein the configuration information indicates a mode, and wherein the one or more parameters are defined according to the mode.

25. The network entity according to claim 22, wherein the configuration information indicates a repetition group associated with the one or more parameters.

26. A wireless communication method performed by a user equipment (UE), comprising: receiving configuration information configuring a reference signal (RS) transmission with a repetition factor, wherein the configuration information indicates one or more parameters for the RS transmission, the one or more parameters including a cyclic shift offset configuration associated with the RS transmission, and wherein the cyclic shift offset configuration indicates a cyclic shift offset at least in part based on a function of a time slot number of a time slot associated with the RS transmission; and performing the RS transmission using the repetition factor according to the configuration.

27. The method according to claim 26, wherein the one or more parameters for the RS transmission include a sequence hopping configuration associated with the RS transmission, and wherein, The sequence hopping configuration indicates that a first sequence is used for two or more RS symbols of the RS transmission in a first subcarrier set and a second sequence is used for two or more RS symbols of the RS transmission in a second subcarrier set.

28. A wireless communication method performed by a network entity, comprising: transmitting configuration information configuring a reference signal (RS) transmission with a repetition factor, wherein the configuration information indicates one or more parameters for the RS transmission, the one or more parameters including a cyclic shift offset configuration associated with the RS transmission, and wherein the cyclic shift offset configuration indicates a cyclic shift offset at least in part based on a function of a time slot number of a time slot associated with the RS transmission; and receiving the RS transmission using the repetition factor according to the configuration.

29. The method according to claim 28, wherein the configuration information indicates a mode, and wherein the one or more parameters are defined according to the mode.

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