SRS enhancements for interference randomization

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting a high data transmission rate. An apparatus and method for SRS enhancement for interference randomization in a wireless network. A method performed by a user equipment (UE) includes receiving a configuration for sounding reference signal (SRS) resources. The configuration includes information about a cyclic shift offset # imgabs0 # and a transmission comb offset [epsilon] {0, 1,..., KTC-1}. # imgabs1 # is the maximum number of cyclic shifts, and KTC is a transmission comb number. The SRS resource is associated with a plurality of antenna ports. The method further includes determining a cyclic shift offset for each of the plurality of antenna ports based on the first pseudorandom sequence; determining a transmission comb offset for each of the plurality of antenna ports based on the second pseudorandom sequence; and transmitting the SRS resource on the basis of the cyclic shift offset and the transmission comb offset.

Description

Technical Field

[0001] The present disclosure relates generally to wireless communication systems, and more particularly, to electronic devices and methods for sounding reference signal (SRS) enhancement for interference randomization in wireless networks. Background Art

[0002] Fifth generation (5G) or new radio (NR) mobile communications are gathering more and more momentum recently with all the global technical activities for various candidate technologies from industry and academia. Candidate enablers for 5G / NR mobile communications include massive antenna technology from traditional cellular frequency bands to high frequencies to provide beamforming gain and support increased capacity, new waveforms (e.g., new radio access technologies (RATs)) to flexibly accommodate various services / applications with different requirements, new multiple access schemes to support massive connections, and so on.

[0003] 5G mobile communication technology defines a wide frequency band, making high transmission rates and new services possible, and can be implemented not only in "sub-6 GHz" frequency bands such as 3.5 GHz, but also in "higher than 6 GHz" frequency bands called millimeter waves (mmWave) including 28 GHz and 39 GHz. In addition, it has been considered to implement 6G mobile communication technology (called super 5G system) in terahertz frequency bands (e.g., 95 GHz to 3 THz frequency bands) in order to achieve a transmission rate fifty times faster than 5G mobile communication technology and an ultra-low latency one-tenth of 5G mobile communication technology.

[0004] At the beginning of the development of 5G mobile communication technology, in order to support services and meet performance requirements related to enhanced mobile broadband (eMBB), ultra-reliable low-latency communication (URLLC), and massive machine type communication (mMTC), standardization has been underway on various technologies: beamforming and massive MIMO for alleviating radio wave path loss and increasing radio wave transmission distance in millimeter waves, dynamic operation of parameter sets (e.g., operating multiple subcarrier intervals) and time slot formats to support efficient use of millimeter wave resources, initial access technology for supporting multi-beam transmission and broadband, definition and operation of BWP (bandwidth part), new channel coding methods (such as LDPC (low-density parity check) codes for large-scale data transmission and polar codes for highly reliable transmission of control information), L2 preprocessing, and network slicing for providing dedicated networks dedicated to specific services.

[0005] Currently, in view of the services that 5G mobile communication technology is to support, discussions are ongoing on improvements and performance enhancements of initial 5G mobile communication technology, and there is already physical layer standardization on various technologies such as: V2X (Vehicle to Everything) for assisting driving determination of autonomous vehicles based on information about the location and status of the vehicle sent by the vehicle and for enhancing user convenience, NR-U (New Radio Unlicensed) for system operation intended to comply with various regulatory requirements in unlicensed bands, NR UE power saving, Non-Terrestrial Network (NTN) as UE-satellite direct communication for providing coverage in areas where communication with terrestrial networks is unavailable, and positioning.

[0006] In addition, in terms of air interface architecture / protocol, standardization is being conducted on various technologies such as the Industrial Internet of Things (IIoT) for supporting new services through interworking and integration with other industries, IAB (Integrated Access and Backhaul) for providing nodes for network service area expansion by supporting wireless backhaul links and access links in an integrated manner, mobility enhancement including conditional switching and DAPS (Dual Active Protocol Stack) switching, and two-step random access (NR's 2-step RACH) for simplifying the random access procedure. In terms of system architecture / services, standardization is also being conducted on various technologies such as the 5G baseline architecture (e.g., service-based architecture or service-based interface) for combining network function virtualization (NFV) and software defined network (SDN) technologies, and mobile edge computing (MEC) for receiving services based on UE location.

[0007] As 5G mobile communication systems are commercialized, the number of connected devices, which has been growing exponentially, will be connected to the communication network, and it is therefore expected that enhanced functions and performance of the 5G mobile communication systems and integrated operations of the connected devices will be necessary. To this end, new research related to the following technologies is planned: extended reality (XR) for effectively supporting AR (augmented reality), VR (virtual reality), MR (mixed reality), etc., 5G performance improvement and complexity reduction by utilizing artificial intelligence (AI) and machine learning (ML), AI service support, metaverse service support, and drone communication.

[0008] Furthermore, such development of 5G mobile communication systems will serve as a basis not only for developing new waveforms for providing coverage in the terahertz band for 6G mobile communication technology, multi-antenna transmission technologies (such as full-dimensional MIMO (FD-MIMO), array antennas, and massive antennas), metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional spatial multiplexing technologies using OAM (orbital angular momentum), and RIS (reconfigurable smart surfaces), but also for developing full-duplex technologies for improving the frequency efficiency of 6G mobile communication technology and improving system networks, AI-based communication technologies for achieving system optimization by utilizing satellites and AI (artificial intelligence) from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technologies for achieving services with a complexity level that exceeds the limits of UE operating capabilities by utilizing ultra-high performance communication and computing resources.

[0009] The above information is provided as background information only to assist with an understanding of the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with respect to the present disclosure. Summary of the invention

[0010] Technical issues

[0011] The present disclosure relates to an apparatus and method for SRS enhancement with interference randomization.

[0012] Technical Solution

[0013] In one embodiment, a user equipment (UE) is provided. The UE includes a transceiver configured to receive a configuration regarding a sounding reference signal (SRS) resource. The configuration includes a configuration regarding and transmission comb offset ∈ {0, 1, ..., K TC -1} information. is the maximum number of cyclic shifts, and K TC is a transmission comb number. The SRS resource is associated with multiple antenna ports. The UE also includes a processor operably coupled to the transceiver. The processor is configured to determine a cyclic shift offset for each of the multiple antenna ports based on a first pseudo-random sequence, and to determine a transmission comb offset for each of the multiple antenna ports based on a second pseudo-random sequence. The transceiver is also configured to send the SRS resource based on the cyclic shift offset and the transmission comb offset.

[0014] In another embodiment, a base station (BS) is provided. The BS includes a transceiver configured to send a configuration regarding a sounding reference signal (SRS) resource and receive the SRS resource. The configuration includes a configuration regarding and transmission comb offset ∈ {0, 1, ..., KTC -1} information. is the maximum number of cyclic shifts, and K TC is a transmission comb number. The SRS resource is associated with multiple antenna ports. The first pseudo-random sequence indicates a cyclic shift offset for each of the multiple antenna ports. The second pseudo-random sequence indicates a transmission comb offset for each of the multiple antenna ports.

[0015] In yet another embodiment, a method performed by a UE is provided. The method includes receiving a configuration regarding an SRS resource. The configuration includes and transmission comb offset ∈ {0, 1, ..., K TC -1} information. is the maximum number of cyclic shifts, and K TC is a transmission comb number. The SRS resource is associated with multiple antenna ports. The method also includes determining a cyclic shift offset for each of the multiple antenna ports based on a first pseudo-random sequence; determining a transmission comb offset for each of the multiple antenna ports based on a second pseudo-random sequence; and sending the SRS resource based on the cyclic shift offset and the transmission comb offset.

[0016] Other technical features may be apparent to those skilled in the art from the following drawings, descriptions and claims.

[0017] Before the following detailed description, it may be advantageous to set forth the definitions of certain words and phrases used throughout this patent document. The term "coupling" and its derivatives refer to any direct or indirect communication between two or more elements, whether or not these elements are in physical contact with each other. The terms "send", "receive" and "communication" and their derivatives include both direct and indirect communication. The terms "include" and "comprise" and their derivatives mean unlimited inclusion. The term "or" is inclusive, meaning and / or. The phrase "associated with..." and its derivatives refer to including, being included in, interconnected with, being included in, being connected to or connected with, being coupled to or coupled with, being communicable with, cooperating with, interweaving, juxtaposing, approaching, being combined with or combined with, having, having... attributes, being related to or being related to, etc. The term "controller" means any device, system or part thereof that controls at least one operation. Such a controller can be implemented in hardware or a combination of hardware and software and / or firmware. The function associated with any particular controller can be centralized or distributed, whether locally or remotely. When used with a list of items, the phrase "at least one of..." means that different combinations of one or more of the listed items can be used, and only one of the items in the list may be required. For example, "at least one of A, B, and C" includes any combination of A, B, C, A and B, A and C, B and C, and A, B, and C.

[0018] In addition, the various functions described below can be implemented or supported by one or more computer programs, each of which is formed by a computer-readable program code and embodied in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, instruction sets, processes, functions, objects, classes, instances, related data or parts thereof suitable for implementation in a suitable computer-readable program code. The phrase "computer-readable program code" includes any type of computer code (including source code, object code and executable code). The phrase "computer-readable medium" includes any type of medium that can be accessed by a computer, such as a read-only memory (ROM), a random access memory (RAM), a hard drive, a compact disc (CD), a digital video disc (DVD) or any other type of memory. "Non-transitory" computer-readable media does not include wired, wireless, optical or other communication links that transmit temporary electrical signals or other signals. Non-transitory computer-readable media include media in which data can be permanently stored and media in which data can be stored and overwritten later, such as rewritable optical discs or erasable storage devices.

[0019] Definitions for certain other words and phrases are provided throughout this patent document. Those of ordinary skill in the art should understand that in many, if not most, instances, such definitions apply to prior, as well as future uses of such defined words and phrases.

[0020] Beneficial Effects

[0021] The present disclosure may provide an apparatus and method for SRS enhancement with interference randomization. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, wherein like reference numerals represent like parts:

[0023] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown;

[0024] Figure 2 An example gNodeB (gNB) according to an embodiment of the present disclosure is shown;

[0025] Figure 3 An example user equipment (UE) according to an embodiment of the present disclosure is shown;

[0026] Figure 4 An example antenna block or array for forming a beam according to an embodiment of the present disclosure is shown;

[0027] Figure 5 An example of code domain hopping using cyclic shifts across time symbols according to an embodiment of the present disclosure is shown;

[0028] Figure 6 An example of code domain hopping using cyclic shifts across time slots according to an embodiment of the present disclosure is shown;

[0029] Figure 7 An example of frequency domain hopping using a transmit comb offset across time symbols according to an embodiment of the present disclosure is shown;

[0030] Figure 8 shows an example of frequency domain hopping using a transmit comb offset across time slots according to an embodiment of the present disclosure; and

[0031] Fig. 9 An example method performed by a UE in a wireless communication system according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0032] Discussed below Figures 1 to 9The various embodiments used to describe the principles of the present disclosure in this patent document are for illustration only and should not be interpreted in any way as limiting the scope of the present disclosure. Those skilled in the art will appreciate that the principles of the present disclosure can be implemented in any appropriately arranged system or device.

[0033] The following documents and standard descriptions are incorporated by reference into the present disclosure as if fully set forth herein: 3GPP TS 36.211 v17.2.0, "E-UTRA, Physical channels and modulation (E-UTRA, physical channels and modulation)" (hereinafter referred to as "reference 1"); 3GPP TS 36.212 v17.2.0, "E-UTRA, Multiplexing and Channel coding (E-UTRA, multiplexing and channel coding)" (hereinafter referred to as "reference 2"); 3GPP TS 36.213 v17.2.0, "E-UTRA, Physical Layer Procedures (E-UTRA, physical layer procedures)" (hereinafter referred to as "reference 3"); 3GPP TS 36.321 v17.1.0, "E-UTRA, Medium Access Control (MAC) protocol specification (E-UTRA, medium access control (MAC) protocol specification)" (hereinafter referred to as "reference 4"); 3GPP TS 36.331 v17.1.0, “E-UTRA, Radio Resource Control (RRC) Protocol Specification” (hereinafter referred to as “Reference 5”); 3GPP TS 38.211 v17.2.0, “NR, Physical channels and modulation” (hereinafter referred to as “Reference 6”); 3GPP TS 38.212 v17.2.0, “NR, Multiplexing and Channel coding” (hereinafter referred to as “Reference 7”); 3GPP TS 38.213 v17.2.0, “NR, Physical Layer Procedures for Control” (hereinafter referred to as “Reference 8”); 3GPP TS 38.214 v17.2.0, “NR, Physical Layer Procedures for Control” (hereinafter referred to as “Reference 9”); Data (NR, physical layer procedures for data)" (hereinafter referred to as "reference 9"); 3GPP TS 38.215v17.1.0, "NR, Physical Layer Measurements (NR, physical layer measurements)" (hereinafter referred to as "reference 10"); 3GPP TS 38.321v17.1.0, "(NR, Medium Access Control (MAC) protocol specification) NR, Medium Access Control (MAC) protocol specification" (hereinafter referred to as "Reference 11"); 3GPP TS 38.331v17.1.0, "NR, Radio Resource Control (RRC) Protocol Specification" (hereinafter referred to as "Reference 12"). .

[0034] Wireless communication is one of the most successful innovations in modern history. The number of subscribers to wireless communication services recently exceeded 5 billion and continues to grow rapidly. The demand for wireless data services is growing rapidly due to the increasing popularity of smartphones and other mobile data devices (such as tablets, "notebook" computers, netbooks, e-book readers and machine-type devices) among consumers and enterprises. In order to meet the high growth of mobile data services and support new applications and deployments, improving radio interface efficiency and coverage is critical.

[0035] In order to meet the increased demand for wireless data services since the deployment of 4G communication systems and to realize various vertical applications, 5G / NR communication systems have been developed and are currently being deployed. 5G / NR communication systems are considered to be implemented in high-frequency (mmWave) bands (e.g., 28 GHz or 60 GHz bands) to achieve high data rates, or in low-frequency bands (such as 6 GHz) to achieve robust coverage and mobility support. In order to reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technology are discussed in 5G / NR communication systems.

[0036] In addition, in the 5G / NR communication system, system network improvements are being developed based on advanced small cells, cloud radio access network (RAN) ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, collaborative communications, coordinated multi-point (CoMP), and receiving-end interference cancellation.

[0037] The discussion of 5G systems and frequency bands associated therewith is for reference, as certain embodiments of the present disclosure may be implemented in 5G systems. However, the present disclosure is not limited to 5G systems or frequency bands associated therewith, and embodiments of the present disclosure may be used in conjunction with any frequency band. For example, aspects of the present disclosure may also be applied to the deployment of 5G communication systems, 6G, or even later versions that may use terahertz (THz) frequency bands.

[0038] One of the features of the Rel-18 MIMO project is the introduction of coherent joint transmission (C-JT) from multiple TRPs. In time division duplex (TDD), channel acquisition for the downlink can be inferred from uplink channel state information by exploiting channel reciprocity. Acquiring uplink channel state information can be done by sending SRS from the UE. In particular, more UEs are supported in the mTRP CJT scenario compared to the sTRP scenario, which may cause inter-cell interference when SRS sent from many UEs are received at the NW.

[0039] In Rel-18 MIMO WID, SRS enhancement has been adopted to provide further flexible configuration to manage inter-TRP interference in TDD C-JT scenarios, as shown in the following description.

[0040] 4. Assuming ideal backhaul and synchronization and the same number of antenna ports across TRPs, study and, where justified, specify enhancements to CSI acquisition for coherent JT for FR1 and up to 4 TRPs as follows:

[0041] - Rel-16 / 17 Type II codebook refinement for CJT mTRP for FDD and its associated CSI reporting, considering the throughput-overhead trade-off,

[0042] -SRS enhancement to manage cross-SRS interference between TRPs for TDD CJT through SRS capacity enhancement and / or interference randomization, where the constraints are 1) no additional resources consumed for SRS; 2) reuse of existing SRS comb structure; 3) no new SRS root sequence

[0043] - NOTE: The maximum number of CSI-RS ports per resource remains the same as in Rel-17, i.e. 32.

[0044] The present disclosure considers SRS enhancement to manage inter-TRP interference for TDD CJT.

[0045] The following Figure 1-Figure 3 Various embodiments are described that are implemented in a wireless communication system and using Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) communication techniques. Figure 1-Figure 3 The description is not meant to imply physical or architectural limitations to the manner in which different embodiments may be implemented. Different embodiments of the present disclosure may be implemented in any suitably arranged communications system.

[0046] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown. Figure 1The embodiment of the wireless network shown is for illustration only. Other embodiments of the wireless network 100 may be used without departing from the scope of the present disclosure.

[0047] like Figure 1 As shown, the wireless network includes gNB 101 (e.g., base station BS), gNB 102, and gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one network 130 (such as the Internet, a proprietary Internet Protocol (IP) network, or other data network).

[0048] gNB 102 provides wireless broadband access to network 130 for a first plurality of user equipment (UE) within coverage area 120 of gNB 102. The first plurality of UEs includes UE 111, which may be located in a small business; UE 112, which may be located in an enterprise; UE 113, which may be a WiFi hotspot; UE 114, which may be located in a first residence; UE 115, which may be located in a second residence; and UE 116, which may be a mobile device such as a cellular phone, a wireless laptop, a wireless PDA, etc. gNB 103 provides wireless broadband access to network 130 for a second plurality of UEs within coverage area 125 of gNB 103. The second plurality of UEs includes UE 115 and UE 116. In some embodiments, one or more of gNBs 101-103 may communicate with each other and with UEs 111-116 using 5G / NR, Long Term Evolution (LTE), Long Term Evolution-Advanced (LTE-A), WiMAX, WiFi, or other wireless communication technologies.

[0049] Depending on the network type, the term "base station" or "BS" may refer to any component (or collection of components) configured to provide wireless access to a network, such as a transmission point (TP), a transmission-reception point (TRP), an enhanced base station (eNodeB or eNB), a 5G / NR base station (gNB), a macro cell, a femto cell, a WiFi access point (AP), or other wireless enabling devices. The base station may provide wireless access according to one or more wireless communication protocols (e.g., 5G / NR Third Generation Partnership Project (3GPP) NR, Long Term Evolution (LTE), LTE Advanced (LTE-A), High Speed ​​Packet Access (HSPA), Wi-Fi 802.11a / b / g / n / ac, etc.). For convenience, the terms "BS" and "TRP" are used interchangeably in this patent document to refer to network infrastructure components that provide wireless access to remote terminals. In addition, depending on the network type, the term "user equipment" or "UE" may refer to any component, such as a "mobile station", "subscriber station", "remote terminal", "wireless terminal", "reception point", or "user equipment". For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to a remote wireless device that wirelessly accesses a BS, whether the UE is a mobile device (such as a mobile phone or smartphone) or is generally considered a fixed device (such as a desktop computer or vending machine).

[0050] The dashed lines illustrate the approximate extents of coverage areas 120 and 125, which are shown as approximately circular for purposes of illustration and explanation only. It should be clearly understood that coverage areas associated with a gNB, such as coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the radio environment associated with natural and man-made obstacles.

[0051] As described in more detail below, one or more of the UEs 111-116 include circuitry, programming, or a combination thereof to support SRS enhancement for interference randomization.In certain embodiments, one or more of the BSs 101-103 include circuitry, programming, or a combination thereof to support SRS enhancement for interference randomization.

[0052] although Figure 1 An example of a wireless network is shown, but Figure 1Various changes may be made. For example, the wireless network may include any number of gNBs and any number of UEs in any suitable arrangement. In addition, gNB 101 may communicate directly with any number of UEs and provide wireless broadband access to network 130 to these UEs. Similarly, each gNB 102-103 may communicate directly with network 130 and provide direct wireless broadband access to network 130 to the UEs. In addition, gNBs 101, 102, and / or 103 may provide access to other or additional external networks, such as an external telephone network or other type of data network.

[0053] Figure 2 An example gNB 102 is shown according to an embodiment of the present disclosure. Figure 2 The embodiment of the gNB 102 shown in FIG. is for illustration only, and Figure 1 gNBs 101 and 103 may have the same or similar configurations. However, gNBs have a variety of configurations, and Figure 2 The scope of the present disclosure is not limited to any particular implementation of the gNB.

[0054] like Figure 2 As shown, the gNB 102 includes multiple antennas 205a-205n, multiple transceivers 210a-210n, a controller / processor 225, a memory 230, and a backhaul or network interface 235.

[0055] The transceivers 210a-210n receive incoming RF signals from the antennas 205a-205n, such as signals transmitted by UEs in the network 100. The transceivers 210a-210n downconvert the incoming RF signals to generate IF or baseband signals. The IF or baseband signals are processed by receive (RX) processing circuits in the transceivers 210a-210n and / or the controller / processor 225, which generate processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. The controller / processor 225 may further process the baseband signals.

[0056] The controller / processor 225 and / or transmit (TX) processing circuitry in the transceivers 210a-210n receive analog or digital data (such as voice data, network data, email, or interactive video game data) from the controller / processor 225. The TX processing circuitry encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The transceivers 210a-210n up-convert the baseband or IF signal to an RF signal that is transmitted via the antennas 205a-205n.

[0057] The controller / processor 225 may include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, the controller / processor 225 may control the reception of uplink (UL) channel signals and the transmission of downlink (DL) channel signals by the transceivers 210a-210n in accordance with well-known principles. The controller / processor 225 may also support additional functionality, such as more advanced wireless communication functionality. For example, the controller / processor 225 may support beamforming or directional routing operations, in which outgoing / incoming signals from / to multiple antennas 205a-205n are weighted differently to effectively direct the outgoing signals in a desired direction. As another example, the controller / processor 225 may support methods for supporting SRS enhancement for interference randomization. The controller / processor 225 may support any of a variety of other functions in the gNB 102.

[0058] Controller / processor 225 is also capable of executing programs and other processes, such as an OS, that reside in memory 230. Controller / processor 225 may move data into or out of memory 230 as required by the executing process.

[0059] The controller / processor 225 is also coupled to a backhaul or network interface 235. The backhaul or network interface 235 allows the gNB 102 to communicate with other devices or systems via a backhaul connection or via a network. The interface 235 may support communication over any suitable wired or wireless connection. For example, when the gNB 102 is implemented as part of a cellular communication system (such as a system supporting 5G / NR, LTE, or LTE-A), the interface 235 may allow the gNB 102 to communicate with other gNBs via a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, the interface 235 may allow the gNB 102 to communicate over a wired or wireless local area network or over a wired or wireless connection to a larger network (such as the Internet). The interface 235 includes any suitable structure that supports communication over a wired or wireless connection, such as Ethernet or a transceiver.

[0060] Memory 230 is coupled to controller / processor 225. Portions of memory 230 may include RAM, and other portions of memory 230 may include flash or other ROM.

[0061] although Figure 2 An example of a gNB 102 is shown, but the Figure 2 For example, gNB 102 may include Figure 2 Any number of each component shown in Figure 2 The various components in may be combined, further subdivided, or omitted, and additional components may be added according to specific needs.

[0062] Figure 3 An example UE 116 is shown in accordance with an embodiment of the present disclosure. Figure 3 The embodiment of UE 116 shown in FIG. 1 is for illustration only, and Figure 1 UEs 111-115 may have the same or similar configurations. However, UEs have a variety of configurations, and Figure 3 The scope of the present disclosure is not limited to any particular implementation of the UE.

[0063] like Figure 3 As shown, UE 116 includes antenna 305, transceiver 310, and microphone 320. UE 116 also includes speaker 330, processor 340, input / output (I / O) interface (IF) 345, input 350, display 355, and memory 360. Memory 360 includes operating system (OS) 361 and one or more applications 362.

[0064] Transceiver 310 receives incoming RF signals from antenna 305 transmitted by a gNB of network 100. Transceiver 310 downconverts the incoming RF signals to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is processed by RX processing circuitry in transceiver 310 and / or processor 340, which generates a processed baseband signal by filtering, decoding, and / or digitizing the baseband or IF signal. The RX processing circuitry transmits the processed baseband signal to speaker 330 (such as for voice data) or is processed by processor 340 (such as for web browsing data).

[0065] The TX processing circuit in the transceiver 310 and / or the processor 340 receives analog or digital voice data from the microphone 320, or receives other outgoing baseband data (such as network data, email, or interactive video game data) from the processor 340. The TX processing circuit encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The transceiver 310 up-converts the baseband or IF signal to an RF signal that is transmitted via the antenna 305.

[0066] The processor 340 may include one or more processors or other processing devices and execute the OS 361 stored in the memory 360 to control the overall operation of the UE 116. For example, the processor 340 may control the transceiver 310 to receive DL channel signals and transmit UL channel signals according to well-known principles. As another example, the processor 340 may support a method for SRS enhancement for interference randomization. In some embodiments, the processor 340 includes at least one microprocessor or microcontroller.

[0067] The processor 340 is also capable of executing other processes and programs resident in the memory 360. The processor 340 can move data into or out of the memory 360 as needed for the executed process. In some embodiments, the processor 340 is configured to execute the application 362 based on the OS 361 or in response to a signal received from the gNB or operator. The processor 340 is also coupled to the I / O interface 345, which provides the UE 116 with the ability to connect to other devices such as laptops and handheld computers. The I / O interface 345 is the communication path between these accessories and the processor 340.

[0068] Processor 340 is also coupled to input 350 including, for example, a touch screen, keyboard, etc., and display 355. An operator of UE 116 may enter data into UE 116 using input 350. Display 355 may be a liquid crystal display, a light emitting diode display, or other display capable of presenting text (such as from a website) and / or at least limited graphics.

[0069] Memory 360 is coupled to processor 340. Portions of memory 360 may include random access memory (RAM), and other portions of memory 360 may include flash memory or other read-only memory (ROM).

[0070] although Figure 3 An example of UE 116 is shown, but the Figure 3 Make various changes. For example, Figure 3 The various components in may be combined, further subdivided, or omitted, and additional components may be added as required. As a specific example, processor 340 may be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). In another example, transceiver 310 may include any number of transceivers and signal processing chains, and may be connected to any number of antennas. In addition, although Figure 3 The UE 116 is shown configured as a mobile phone or smart phone, but the UE may be configured to operate as other types of mobile or stationary devices.

[0071] The 3GPP NR specification supports up to 32 CSI-RS antenna ports, which enables the gNB to be equipped with a large number of antenna elements (such as 64 or 128). In this case, multiple antenna elements are mapped to one CSI-RS port. For next-generation cellular systems such as 5G, the maximum number of CSI-RS ports can remain the same or increase.

[0072] Figure 4 An example antenna block or array 400 is shown in accordance with an embodiment of the present disclosure. Figure 4The illustrated embodiment of antenna block or array 400 is for illustration only. Figure 4 The scope of the present disclosure is not limited to any particular implementation of antenna blocks or arrays.

[0073] Rel.14 LTE and Rel.15 NR support up to 32 CSI-RS antenna ports, which enables the eNB to be equipped with a large number of antenna elements (such as 64 or 128). In this case, multiple antenna elements are mapped to one CSI-RS port. For mmWave bands, although the number of antenna elements can be larger for a given form factor, the number of CSI-RS ports (which can correspond to the number of digital precoding ports) is often limited due to hardware constraints (such as the feasibility of installing a large number of ADCs / DACs at mmWave frequencies), such as Figure 4 As shown. In this case, one CSI-RS port is mapped to a large number of antenna elements that can be controlled by a set of analog phase shifters 401. One CSI-RS port can correspond to a subarray that produces a narrow analog beam through analog beamforming 405. By varying the phase shifter set across symbols or subframes, the analog beam can be configured to sweep across a wider range of angles 420. The number of subarrays (equal to the number of RF chains) is proportional to the number of CSI-RS ports N. CSI-PORT The digital beamforming unit 410 spans N CSI-PORT The analog beams are linearly combined to further increase the precoding gain. While the analog beams are wideband (and therefore not frequency selective), the digital precoding can vary across frequency subbands or resource blocks. Receiver operation can be similarly envisioned.

[0074] Since the above-described system utilizes multiple simulated beams for transmission and reception (where one or a small number of simulated beams are selected from a large number of simulated beams, for example, from time to time after a training duration), the term "multi-beam operation" is used to refer to the entire system aspect. For the purpose of description, this includes indicating an assigned DL or UL transmit (TX) beam (also referred to as "beam indication"), measuring at least one reference signal for calculating and performing beam reporting (also referred to as "beam measurement" and "beam reporting", respectively), and receiving DL or UL transmissions by selecting a corresponding receive (RX) beam.

[0075] The above system is also applicable to higher frequency bands, such as >52.6GHz (also known as FR4). In this case, the system can only use analog beams. Due to the O2 absorption loss near 60GHz frequency (about 10dB additional loss at 100m distance), more and sharper analog beams (thus a larger number of radiators in the array) will be required to compensate for the additional path loss.

[0076] Various embodiments of the present disclosure recognize that, in the current SRS framework, support for SRS resources is associated only with the same set of cyclic shifts across time resources. When some UEs happen to be allocated SRS resources with the same set of time / frequency / code resources, significant interference (e.g., referred to as a conflict) may occur, and unless they are reconfigured with another set of time / frequency / code resources, they will remain significantly interfered. In addition, various embodiments of the present disclosure recognize that, in the current SRS framework, support for SRS resources is associated only with the same transmission comb offset. When some UEs happen to be allocated SRS resources with the same set of time / frequency / code resources, significant interference (e.g., referred to as a conflict) may occur, and unless they are reconfigured with another set of time / frequency / code resources, they will remain significantly interfered.

[0077] Therefore, various embodiments of the present disclosure provide mechanisms for implementing cyclic shift hopping across time (e.g., time slots, symbols, etc.) to avoid potential persistent interference when the SRS resources of certain UEs happen to be the same. This cyclic shift hopping approach can provide some benefits, such as randomizing interference over time because the cyclic shift can be different over time. Even if a conflict occurs for certain UEs at a certain time, cyclic shift hopping allows interference to be mitigated / randomized at different times.

[0078] In addition, various embodiments of the present disclosure provide a mechanism for implementing transmission comb offset hopping across time (e.g., time slots, symbols, etc.) to avoid potential persistent interference when the SRS resources of certain UEs happen to be the same. This transmission comb hopping method can provide some benefits, such as mitigating interference over time because the transmission comb offset can be different over time. Even if a conflict occurs for certain UEs at a certain time, the transmission comb offset hopping allows for mitigation / suppression of interference at different times.

[0079] In TDD, SRS transmissions from UEs are the primary source for acquiring CSI at the gNB for both UL and DL channels. However, SRS transmissions may be more congested in multi-TRP (mTRP) scenarios, where a gNB controlling a CJT-capable mTRP may support more UEs (associated with a given cell ID) and require more frequent CSI acquisitions. This may result in an increased likelihood of scheduling SRS resources for multiple UEs that overlap in a given time and frequency resource. Therefore, in a congested mTRP scenario, the potential interference across SRS transmissions from multiple UEs may be severe, and SRS enhancement may be required to manage inter-TRP / cross-SRS interference for TDD CJT.

[0080] Under the three constraints described in Rel-18 WID, the following two directions can be considered to randomize or manage inter-TRP cross-SRS interference:

[0081] Enhanced frequency hopping mode

[0082] • Enhanced code domain (eg, cyclic shift, root sequence, comb offset) hopping.

[0083] In Rel-17 SRS enhancement, the number of supported symbol repetitions has been increased to up to 14 for SRS coverage enhancement. This may be useful in TDD CJT scenarios, where cell edge UEs that typically require a large number of symbol repetitions are taken as CJT candidates. On the other hand, since the situation with limited time / frequency resources may occur more frequently, the inter-SRS interference may be worse across such scheduled UEs. To reduce interference in such scenarios, code domain hopping (e.g., cyclic shift and sequence group / numbering) across time symbols / slots may be considered for interference randomization across scheduled UEs. Code domain hopping across symbols in frequency hopping SRS transmission may also be considered.

[0084] SRS resources are configured by SRS-Resource IE or SRS-PosResource IE and include

[0085] - Antenna ports The number of antenna ports is given by the higher-level parameter nrofSRS-Ports (if configured), otherwise And when the SRS resource is in the SRS resource set and the higher-level parameter usage in the SRS-ResourceSet is not set to "nonCodebook" i =1000+i, or when the SRS resource is located in an SRS resource set and the higher layer parameter usage in SRS-ResourceSet is set to "nonCodebook", it is determined according to [6, TS 38.214].

[0086] - consecutive OFDM symbols, given by the field nrofSymbols (number of symbols) contained in the higher-level parameter resourceMapping (resource mapping).

[0087] -l 0 ,Depend on The starting position in the time domain is given by offset∈{0, 1, ..., 13} counts down from the end of the time slot and is determined by the fields startPosition and Given.

[0088] -k 0 , the frequency domain starting position of the detection reference signal

[0089] The sounding reference signal sequence for SRS resources will be generated according to the following formula:

[0090]

[0091] in, Given by clause 6.4.1.4.3 of [6], Given by clause 5.2.2 of [6], where δ = log 2 (K TC ), and transmit comb number K TC ∈{2, 4, 8} is included in the high-level parameter transmissionComb. Antenna port p i The cyclic shift α i Given by the following formula

[0092]

[0093] Contained in the higher level parameter transmissionComb.

[0094] Maximum number of cyclic shifts Given by Table 6.4.1.4.2-1 of [6].

[0095] Table 6.4.1.4.2-1: As K TC The maximum number of circular shifts of a function

[0096]

[0097] When transmitting SRS on a given SRS resource, for each and every OFDM symbol l′ in the antenna port of the SRS resource, the sequence will be scaled with the amplitude scaling factor β SRS Multiply them to meet the transmit power requirements in [8], and then Start to map to each antenna port p in order i Resource elements (k, l) in the time slot of:

[0098]

[0099] The length of the sounding reference signal sequence is given by:

[0100]

[0101] Among them, m SRS，b Given by selected rows of Table 6.4.1.4.3-1 of [6], with b = B SRS , where B SRS ∈{0, 1, 2, 3} is given by the field b-SRS contained in the higher layer parameter freqHopping (if configured), otherwise B SRS = 0. The rows of the table are indexed according to the index C given by the field c-SRS contained in the high-level parameter freqHopping. SRS ∈{0, 1, ..., 63}. F ∈{2, 4} is given by the high-level parameter FreqScalingFactor (frequency scaling factor) if configured, otherwise R F = 1. When FreqScalingFactor is configured, the UE expects the length of the SRS sequence to be a multiple of 6.

[0102] Frequency domain start position Defined by:

[0103]

[0104] in:

[0105]

[0106] and

[0107] -k F ∈{0, 1, ..., P F -1} is given by the higher-level parameter StartRBIndex (starting RB index) if configured, otherwise k F =0;

[0108] -k hop Given by Table 6.4.1.4.3-3 of [6], and

[0109]

[0110] If the high-level parameter EnableStartRBHopping is configured, otherwise k hop =0.

[0111] if The reference point is subcarrier 0 in common resource block 0, otherwise, the reference point is the lowest subcarrier of the BWP.

[0112] If SRS is configured by IE SRS-PosResource, then Given by Table 6.4.1.4.3-2 of [6], otherwise,

[0113] Frequency domain shift value n shift The SRS allocation is adjusted relative to the reference point grid and is contained in the higher layer parameter freqDomainShift in the SRS-Resource IE or SRS-PosResource IE. Transmit Comb Offset Contained in the higher-level parameter transmissionComb in the SRS-Resource IE or SRS-PosResource IE, and n b is the frequency position index.

[0114] Figure 5 An example of code domain hopping 500 using cyclic shifts across time symbols according to an embodiment of the present disclosure is shown. Figure 5 The illustrated embodiment of code domain hopping 500 using cyclic shifts across time symbols is for illustration only. Figure 5 The scope of the present disclosure is not limited to any particular implementation of code domain hopping 500 using cyclic shifts across time symbols.

[0115] Figure 6 An example of code domain hopping 600 using cyclic shifts across time slots is shown according to an embodiment of the present disclosure. Figure 6 The illustrated embodiment of code domain hopping 600 using cyclic shifts across time slots is for illustration only. Figure 6 The scope of the present disclosure is not limited to any particular implementation of code domain hopping 600 using cyclic shifts across time slots.

[0116] like Figure 5 and Figure 6 As shown, in one embodiment, SRS resources are generated based on code domain hopping across time symbols / time slots (or subframes / frames), wherein the code domain hopping across time includes that code domain parameters of SRS resources can be assigned / allocated differently across time. For example, the code domain parameters may include a cyclic shift (CS) value / index Group or sequence index u,v. Figure 5 An example illustrating code domain hopping using cyclic shifts across time symbols is shown. Figure 6 An example illustrating code domain hopping using cyclic shifts across time slots is shown in FIG.

[0117] In one embodiment, the cyclic shift index Depends on higher layer parameters, such as "cyclicShiftHopping" in SRS-Resource IE or SRS-PosResource IE.

[0118] In one example, the circular shift index is determined by using a function of the pseudo-random sequence c(i) defined in clause 5.2.1 of [6]. For example, in:

[0119] · is included in the high-level parameter transmissionComb,

[0120] · is a function that uses a pseudo-random sequence c(i), and

[0121] · is the maximum number of cyclic shifts given in Table 6.4.1.4.2-1 of [6].

[0122] Here, in one example, is a new parameter used to enable cyclic shift hopping. can be a function of the time index, so, The resulting values ​​can be different in the time index.

[0123] In one example, cyclic shift hopping can be disabled or enabled by a high-level parameter “cyclicShiftHopping”. In one example, it can be a one-bit indicator, for example, indicating “on” or “off”.

[0124] In one example, "cyclicShiftHopping" indicates "off", otherwise, Can be a time-indexed function following one of the examples below.

[0125] In one example, using a pseudo-random sequence c(i), is a function of the time index.

[0126] In one example, in, is the timeslot number within the frame used for the subcarrier spacing configuration μ.

[0127] In one example, For example, a=1. In another example, in, is the number of symbols per time slot. In one example, b=l 0 , where l 0is the starting position described in clause 6.4.1.4.1 of [6].

[0128] In one example, In one example, a=1. In another example, In one example, b=1 0 In one example, M may be a positive integer, that is, M=1, 2, 3, 4, 5, 6, 7, 8, 9, or . . .

[0129] In one example, in, is the time slot number within the frame for the subcarrier spacing configuration μ, and the quantity It is the OFDM symbol number in the SRS resource.

[0130] In one example, For example, a=1. In another example, in, is the number of symbols per time slot. In one example, b=1 0 , where l 0 is the starting position described in clause 6.4.1.4.1 of [6].

[0131] In one example, In one example, a=1. In another example, In one example, b=1 0 In one example, M may be a positive integer, that is, M=1, 2, 3, 4, 5, 6, 7, 8, 9, or . . .

[0132] In one example, in, is the timeslot number within the subframe used for subcarrier spacing configuration μ.

[0133] In one example, For example, a=1. In another example, in, is the number of symbols per time slot. In one example, b=l 0 , where l 0 is the starting position described in clause 6.4.1.4.1 of [6].

[0134] In one example, In one example, a=1. In another example, In one example, b=1 0 In one example, M may be a positive integer, that is, M=1, 2, 3, 4, 5, 6, 7, 8, 9, or . . .

[0135] In one example, in, is the time slot number within the subframe for the subcarrier spacing configuration μ, and the quantity It is the OFDM symbol number within the SRS resource.

[0136] In one example, For example, a=1. In another example, in, is the number of symbols per time slot. In one example, b=l 0 , where l 0 is the starting position described in clause 6.4.1.4.1 of [6].

[0137] In one example, In one example, a=1. In another example, In one example, b=1 0 In one example, M may be a positive integer, that is, M=1, 2, 3, 4, 5, 6, 7, 8, 9 or . . .

[0138] In one example, using a pseudo-random sequence c(i), is the time index and SRS sequence ID function.

[0139] In one example, in, is the timeslot number within the frame used for the subcarrier spacing configuration μ.

[0140] In one example, For example, a=1. In another example, in, is the number of symbols per time slot. In one example, b=l 0 , where l 0 is the starting position described in clause 6.4.1.4.1 of [6].

[0141] In one example, In one example, a=1. In another example, In one example, b=1 0 In one example, M may be a positive integer, that is, M=1, 2, 3, 4, 5, 6, 7, 8, 9, or . . .

[0142] In one example, in, is the time slot number within the frame for the subcarrier spacing configuration μ, and the quantity It is the OFDM symbol number within the SRS resource.

[0143] In one example, For example, a=1. In another example, in, is the number of symbols per time slot. In one example, b=l 0 , where l 0 is the starting position described in clause 6.4.1.4.1 of [6].

[0144] In one example, In one example, a=1. In another example, In one example, b=1 0 In one example, M may be a positive integer, that is, M=1, 2, 3, 4, 5, 6, 7, 8, 9, or . . .

[0145] In one example, in, is the timeslot number within the subframe used for subcarrier spacing configuration μ.

[0146] In one example, For example, a=1. In another example, in, is the number of symbols per time slot. In one example, b=l 0 , where l 0 is the starting position described in clause 6.4.1.4.1 of [6].

[0147] In one example, In one example, a=1. In another example, In one example, b=1 0 In one example, M may be a positive integer, that is, M=1, 2, 3, 4, 5, 6, 7, 8, 9, or . . .

[0148] In one example, in, is the time slot number within the subframe for the subcarrier spacing configuration μ, and the quantity It is the OFDM symbol number within the SRS resource.

[0149] In one example, For example, a=1. In another example, in, is the number of symbols per time slot. In one example, b=l 0 , where l 0 is the starting position described in clause 6.4.1.4.1 of [6].

[0150] In one example, In one example, a=1. In another example, In one example, b=1 0 In one example, M may be a positive integer, that is, M=1, 2, 3, 4, 5, 6, 7, 8, 9 or . . .

[0151] In one embodiment, the cyclic shift index Depends on higher layer parameters, for example, "cyclicShiftInterval" in SRS-Resource IE or SRS-PosResource IE.

[0152] In one example, the circular shift index is defined as and is a function of the cyclic shift interval.

[0153] ·For example, where x is the value configured by "cyclicShiftInterval" and It is the OFDM symbol number within the SRS resource.

[0154] In one example,

[0155]

[0156] ·For example, Where x is the value configured by "cyclicShiftInterval", is the OFDM symbol number within the SRS resource, and It is the SRS sequence ID.

[0157] In one example,

[0158] In another example,

[0159] In one example, the value of x ("cyclicShiftInterval" in higher layer signaling) may be indicated via MAC-CE or DCI.

[0160] In one example, having The bit indicator is used to indicate via MAC-CE or DCI The value of .

[0161] In one example, having The bit indicator is used to indicate via MAC-CE or DCI The value of .

[0162] In one example, The subset S of The bit indicator indicates.

[0163] In one example, The subset S of The bit indicator indicates.

[0164] In one example, the repetition factor R cs Configured via higher layer parameters, MAC-CE or DCI. For example, R cs ∈{2,4}. In another example, In another example, When R cs When configured, can be calculated as follows:

[0165] In one example,

[0166] In one example,

[0167] Note that when the mTRP manages SRS resources in a scenario where interference from mTRPs or sTRPs associated with other cells is limited, a regular hopping pattern that does not rely on a pseudo-random generator may be beneficial. A NW with an mTRP may manage SRS interference for UEs associated with the NW through a regular hopping pattern.

[0168] In one embodiment, the cyclic shift index Depending on the higher layer parameters, for example, "cyclicShiftHoppingPattern" in SRS-Resource IE or SRS-PosResource IE, a set of cyclic shift hopping patterns may be defined. For example, for a set of cyclic shift hopping patterns, The symbols are All possible combinations (P) associated with one of the cyclic shifts can be considered. In this case, the number of possible combinations can be calculated by Some examples are given below:

[0169] In one example, the cyclic shift index of all OFDM symbols Configured via the new higher-level parameter transmissionComb or higher-level parameter cyclicShiftHoppingPattern defined in the specification.

[0170] In one example, cyclicShiftHoppingPattern or transmissionComb includes bits to indicate all possible combinations.

[0171] In one example, cyclicShiftHoppingPattern or transmissionComb includes bits to indicate all possible combinations.

[0172] In one example, is configured for the first OFDM symbol (ie, for l′=0), for example via the higher layer parameter transmissionComb specified in TS 38.211, and for the remaining OFDM symbols (ie, for ) is configured via the high-level parameter "cyclicShiftHoppingPattern".

[0173] In one example, the cyclicShiftHoppingPattern includes Bit to indicate the all possible combinations of .

[0174] In one example, the cyclicShiftHoppingPattern includes Bit to indicate the all possible combinations of .

[0175] In one embodiment, for a set of cyclic shift hopping patterns, The symbols are A subset P of all possible combinations (P) associated with one of the cyclic shifts sub Can be considered.

[0176] In one embodiment, for a set of cyclic shift hopping patterns, The symbols are A subset P of all possible combinations (P) associated with one of the cyclic shifts sub Can be considered.

[0177] In one embodiment, the cyclic shift index Determined by any mixture of the above embodiments.

[0178] is determined by using a pseudo-random generator across slots (or subframes / frames) and cyclicShiftInterval or cyclicShiftHoppingPattern across symbols within a slot. in:

[0179] · is included in the high-level parameter transmissionComb,

[0180] · is a function using a pseudo-random sequence c(i) whose output is a cyclic shift relative to the time slot,

[0181] · It is a function of the cyclic shift interval, and its output is relative to the cyclic shift of the symbol.

[0182] · is the maximum number of cyclic shifts given in Table 6.4.1.4.2-1 of [6].

[0183] In one example, can be one of the examples shown herein that does not include l′, and Could be one of the examples in this article.

[0184] In one example, can be one of the examples shown herein that does not include l′, and Could be one of the examples in this article.

[0185] Figure 7 An example of frequency domain hopping 700 using transmit comb offsets across time symbols is shown in accordance with an embodiment of the present disclosure. Figure 7 The embodiment of frequency domain hopping 700 using transmit comb offsets across time symbols shown in FIG. 7 is for illustration only. Figure 7 The scope of the present disclosure is not limited to any particular implementation of frequency domain hopping 700 using transmit comb offsets across time symbols.

[0186] Figure 8 An example of frequency domain hopping 800 using transmit comb offsets across time slots is shown in accordance with an embodiment of the present disclosure. Figure 8 The illustrated embodiment of frequency domain hopping 800 using transmit comb offsets across time slots is for illustration only. Figure 8 The scope of the present disclosure is not limited to any particular implementation of frequency domain hopping 800 using transmit comb offsets across time slots.

[0187] like Figure 7 and Figure 8 As shown, in one embodiment, SRS resources are generated based on frequency domain hopping across time symbols / time slots (or subframes / frames), wherein the frequency domain hopping across time includes that the frequency domain parameters of the SRS resources can be assigned / allocated differently across time. For example, the frequency domain parameters may include a transmission comb offset value / index Figure 7 An example illustrating frequency domain hopping using a transmit comb offset across time symbols is shown. Figure 8 An example illustrating frequency domain hopping using transmit comb offsets across time slots is shown in FIG.

[0188] In one embodiment, the transmission comb offset Depends on higher layer parameters, such as "transmission comb offset hopping" in SRS-Resource IE or SRS-PosResource IE.

[0189] In one example, the transmission comb offset is determined by using a function of the pseudo-random sequence c(i) defined in clause 5.2.1 of [6]. For example, in:

[0190] k′ TC ∈{0, 1, …, K TC -1} is included in the high-level parameter transmissionComb,

[0191] · is a function that uses a pseudo-random sequence c(i), and

[0192] ·K TC It is the high-level parameter transmissionComb.

[0193] Here, in one example, is a new parameter for enabling transmission comb offset. can be a function of the time index, so, The resulting values ​​can be different in the time index.

[0194] In one example, transmission comb offset hopping can be disabled or enabled by a higher layer parameter transmissioncomboboffsethopping. In one example, it can be a one-bit indicator, for example, indicating "on" or "off".

[0195] In one example, transmissionCombOffsetHopping indicates "off", otherwise, Can be a time-indexed function following one of the following examples.

[0196] In one example, using a pseudo-random sequence c(i), is a function of the time index.

[0197] In one example, in, is the timeslot number within the frame used for the subcarrier spacing configuration μ.

[0198] In one example, For example, a=1. In another example, in, is the number of symbols per time slot. In one example, b=l 0 , where l 0 is the starting position described in clause 6.4.1.4.1 of [6].

[0199] In one example, In one example, a=1. In another example, In one example, b=1 0 In one example, M may be a positive integer, that is, M=1, 2, 3, 4, 5, 6, 7, 8, 9, or . . . in, is the time slot number within the frame for the subcarrier spacing configuration μ, and the quantity It is the OFDM symbol number within the SRS resource.

[0200] In one example, For example, a=1. In another example, in, is the number of symbols per time slot. In one example, b=l 0 , where l 0 is the starting position described in clause 6.4.1.4.1 of [6].

[0201] In one example, In one example, a=1. In another example, In one example, b=1 0 In one example, M may be a positive integer, that is, M=1, 2, 3, 4, 5, 6, 7, 8, 9, or . . .

[0202] In one example, in, is the timeslot number within the subframe used for subcarrier spacing configuration μ.

[0203] In one example, For example, a=1. In another example, in, is the number of symbols per time slot. In one example, b=l 0 , where l 0 is the starting position described in clause 6.4.1.4.1 of [6].

[0204] In one example, In one example, a=1. In another example, In one example, b=1 0 In one example, M may be a positive integer, that is, M=1, 2, 3, 4, 5, 6, 7, 8, 9, or . . .

[0205] In one example, in, is the time slot number within the subframe for the subcarrier spacing configuration μ, and the quantity It is the OFDM symbol number within the SRS resource.

[0206] In one example, For example, a=1. In another example, in, is the number of symbols per time slot. In one example, b=l 0 , where l 0 is the starting position described in clause 6.4.1.4.1 of [6].

[0207] In one example, In one example, a=1. In another example, In one example, b=1 0 In one example, M may be a positive integer, that is, M=1, 2, 3, 4, 5, 6, 7, 8, 9, or . . .

[0208] In one example, using a pseudo-random sequence c(i), is the time index and SRS sequence ID function.

[0209] In one example, in, is the timeslot number within the frame used for the subcarrier spacing configuration μ.

[0210] In one example, For example, a=1. In another example, in, is the number of symbols per time slot. In one example, b=l 0 , where l0 is the starting position described in clause 6.4.1.4.1 of [6].

[0211] In one example, In one example, a=1. In another example, In one example, b=1 0 In one example, M may be a positive integer, that is, M=1, 2, 3, 4, 5, 6, 7, 8, 9, or . . .

[0212] In one example, in, is the time slot number within the frame for the subcarrier spacing configuration μ, and the quantity It is the OFDM symbol number within the SRS resource.

[0213] In one example, For example, a=1. In another example, in, is the number of symbols per time slot. In one example, b=l 0 , where l 0 is the starting position described in clause 6.4.1.4.1 of [6].

[0214] In one example, In one example, a=1. In another example, In one example, b=1 0 In one example, M may be a positive integer, that is, M=1, 2, 3, 4, 5, 6, 7, 8, 9, or . . .

[0215] In one example, in, is the timeslot number within the subframe used for subcarrier spacing configuration μ.

[0216] In one example, For example, a=1. In another example, in, is the number of symbols per time slot. In one example, b=l 0 , where l 0 is the starting position described in clause 6.4.1.4.1 of [6].

[0217] In one example, In one example, a=1. In another example, In one example, b=1 0 In one example, M may be a positive integer, that is, M=1, 2, 3, 4, 5, 6, 7, 8, 9, or . . .

[0218] In one example, in, is the time slot number within the subframe for the subcarrier spacing configuration μ, and the quantity It is the OFDM symbol number within the SRS resource.

[0219] In one example, For example, a=1. In another example, in, is the number of symbols per time slot. In one example, b=l 0 , where l 0 is the starting position described in clause 6.4.1.4.1 of [6].

[0220] In one example, In one example, a=1. In another example, In one example, b=1 0 In one example, M may be a positive integer, that is, M=1, 2, 3, 4, 5, 6, 7, 8, 9, or . . .

[0221] In one embodiment, the transmission comb offset Depends on higher layer parameters, for example, transmissionCombOffsetInterval in SRS-Resource IE or SRS-PosResource IE.

[0222] In one example, the transmission comb offset is defined as and is a function of the transmission comb shift interval.

[0223] ·For example, Where x is the value configured by transmissionCombOffsetInterval, and the number It is the OFDM symbol number within the SRS resource.

[0224] In one example, x∈{0, 1, ..., K TC -1}.

[0225] In another example, x∈{1, 2, ..., K TC -1}.

[0226] ·For example, Among them, x is the value configured by transmissionCombOffsetInterval, is the number of OFDM symbols within the SRS resource, and It is the SRS sequence ID.

[0227] In one example, x∈{0, 1, ..., K TC -1}.

[0228] In another example, x∈{1, 2, ..., K TC -1}.

[0229] In one example, the value of x may be indicated via MAC-CE or DCI (transmissionCombOffsetInterval in higher layer signaling).

[0230] In one example, having A bit indicator is used to indicate x∈{0, 1, ..., K TC -1}.

[0231] In one example, having A bit indicator is used to indicate x∈{1, 1, ..., K TC -1}.

[0232] In one example, {0, 1, ..., K TC -1} is configured via higher layer signaling or MAC-CE, and one of the subsets, x∈S, is configured via The bit indicator indicates.

[0233] In one example, {1, 2, ..., K TC -1} is configured via higher layer signaling or MAC-CE, and one of the subsets, x∈S, is configured via [log 2 |S|] bit indicator indicates.

[0234] In one example, the repetition factor R tcs Configured via higher layer parameters, MAC-CE or DCI. For example, R tcs ∈{2,4}. In another example, In another example, When R tcs When configured, can be calculated as follows:

[0235] In one example,

[0236] In one example,

[0237] Note that a regular hopping pattern that does not rely on a pseudo-random generator may be beneficial when the mTRP manages SRS resources in a scenario where interference from mTRPs or sTRPs associated with other cells is limited. A NW with an mTRP may manage SRS interference for UEs associated with the NW through a regular hopping pattern.

[0238] In one embodiment, the transmission comb offset Depending on the higher layer parameters, for example, "transmissionCombOffsetHoppingPattern" in SRS-Resource IE or SRS-PosResource IE, a set of transmission comb offset hopping patterns may be defined. For example, for a set of transmission comb offset hopping patterns, Each symbol is associated with K TC All possible combinations (P) associated with one of the cyclic shifts can be considered. In this case, the number of possible combinations can be given by Some examples are given below:

[0239] In one example, the transmit comb of all OFDM symbols is offset Configured via the new higher-layer parameter transmissionComb or higher-layer parameter "transmissionCombOffsetHoppingPattern" defined in the specification.

[0240] In one example, a "transmissionCombOffsetHoppingPattern" or transmissionComb includes bits to indicate all possible combinations.

[0241] In one example, a "transmissionCombOffsetHoppingPattern" or transmissionComb includes bits to indicate all possible combinations.

[0242] In one example, is configured for the first OFDM symbol (ie, for l′=0), for example via the higher layer parameter transmissionComb specified in TS 38.211, and for the remaining OFDM symbols (ie, for ) is configured via the higher level parameter "transmissionCombOffsetHoppingPattern".

[0243] In one example, "transmissionCombOffsetHoppingPattern" includes Bit to indicate the all possible combinations of .

[0244] In one example, "transmissionCombOffsetHoppingPattern" includes bit to indicate the all possible combinations of .

[0245] In one embodiment, for a set of transmit comb offset hopping patterns, where Each symbol is associated with K TC The subset P of all possible combinations (P) associated with one of the transmission comb offsets sub Can be considered.

[0246] In one embodiment, for a set of transmit comb offset hopping patterns, where Each symbol is associated with K TC The subset P of all possible combinations (P) associated with one of the transmission comb offsets sub Can be considered.

[0247] In one embodiment, the transmission comb offset Depends on higher layer parameters, for example, freqHopping in SRS-Resource IE or SRS-PosResource IE.

[0248] In one example, the transmission comb offset is defined as and yes function, and is defined as

[0249]

[0250] In one example, as The amount of function Follow Table 1.

[0251] [Table 1]

[0252]

[0253] In one example, as The amount of function Follow a table with a different numerical order in columns 2, 3, and / or 4 than Table 1. For example, the following Table 2 may be used:

[0254] [Table 2]

[0255]

[0256] In one embodiment, the transmission comb offset Determined by any mixture of the above embodiments.

[0257] In one example, the transmission comb offset is determined by using a pseudo-random generator across slots (or subframes / frames) and the transmissionCombOffsetInterval or "transmissionCombOffsetHoppingPattern" across symbols within a slot. For example, in:

[0258] k′ TC ∈{0,1,…,K TC -1} is included in the high-level parameter transmissionComb,

[0259] · is a function using a pseudo-random sequence c(i) whose output is offset relative to the transmission comb of the time slot,

[0260] · is a function of the cyclic shift interval, whose output is offset relative to the transmitted comb of symbols.

[0261] ·K TC It is the transmission comb configured by the higher-level parameter transmissionComb.

[0262] In one example, can be one of the examples shown herein that does not include l′, and Could be one of the examples in this article.

[0263] In one example, can be one of the examples shown herein that does not include l′, and Could be one of the examples in this article.

[0264] Fig. 9 An example method 900 performed by a UE in a wireless communication system according to an embodiment of the present disclosure is shown. Fig. 9 The method 900 may be performed by Figure 1 Any of UEs 111-116 (such as Figure 3 UE 116) is executed, and the corresponding method can be performed by Figure 1 Any of BS101-103 (such as Figure 2The method 900 is for illustration only, and other embodiments may be used without departing from the scope of the present disclosure.

[0265] The method begins with the UE receiving a configuration regarding SRS resources (910). For example, in 910, the configuration includes and transmission comb offset ∈ {0, 1, ..., K TC -1}, where is the maximum number of cyclic shifts, and K TC is the transmission comb number. An SRS resource may be associated with multiple antenna ports.

[0266] The UE then determines a cyclic shift offset for each of the plurality of antenna ports (920). For example, at 920, the UE determines a cyclic shift offset for each of the plurality of antenna ports based on the first pseudo-random sequence. In various embodiments, the determined In various embodiments, the UE may and l′ to determine the cyclic shift offset, where is the timeslot number within the frame for the subcarrier spacing configuration μ, and is the orthogonal frequency division multiplexing (OFDM) symbol number within the SRS resource. In various embodiments, the UE may use to determine the cyclic shift offset, where a≥0 and b≥0 are constant values.

[0267] The UE then determines a transmit comb offset for each of the plurality of antenna ports (930). For example, in 930, the determination of the transmit comb offset for each of the plurality of antenna ports is based on a second pseudo-random sequence. In various embodiments, the first pseudo-random sequence and the second pseudo-random sequence correspond to c(i), where c(i) is defined by: c(i)=(x 1 (n+N C )+x 2 (n+N C ))mod2,x 1 (n+31)=(x 1 (n+3)+x 1 (n))mod2, and x 2 (n+31)=(x 2 (n+3)+x 2 (n+2)+x 2 (n+1)+x 2 (n))mod2. Here, N C =1600, and x 1 (n) Use x 1 (0) = 1, x1 (n) = 0, n = 1, 2, ..., 30 initialization, and x 2 (n) through In various embodiments, the determined transmission comb offset ∈ {0, 1, ..., K TC -1}. In various embodiments, the UE may be based on the parameter and l′ to determine the transmission comb offset, where is the timeslot number within the frame for the subcarrier spacing configuration μ, and is the OFDM symbol number within the SRS resource. In various embodiments, the UE may use to determine the transmission comb offset, where a≥0 and b≥0 are constant values.

[0268] Then, the UE transmits SRS resources (940). For example, in 940, the SRS resources are transmitted based on the cyclic shift offset and the transmission comb offset.

[0269] Any of the above-mentioned variations can be used independently or in combination with at least one other variation. The above-mentioned flow chart shows an example method that can be implemented according to the principles of the present disclosure, and various changes can be made to the method shown in the flow chart herein. For example, although shown as a series of steps, the individual steps in each figure can overlap, occur in parallel, occur in different orders, or occur multiple times. In another example, a step can be omitted or replaced by another step.

[0270] Although the drawings illustrate different examples of user equipment, various changes may be made to the drawings. For example, the user equipment may include any number of each component in any suitable arrangement. In general, the drawings do not limit the scope of the present disclosure to any particular configuration. In addition, although the drawings illustrate operating environments in which various user equipment features disclosed in this patent document may be used, these features may be used in any other suitable system.

[0271] Although the disclosure has been described with exemplary embodiments, various variations and modifications may be conceived by those skilled in the art. The disclosure is intended to include these variations and modifications that fall within the scope of the appended claims. Any description in this application should not be construed as implying that any particular element, step or function is an essential element that must be included within the scope of the claims. The scope of the patent subject matter is defined by the claims.

Claims

1. A user equipment (UE), comprising: Transceiver; and A processor is coupled to the transceiver and is configured to: Receive a configuration regarding a sounding reference signal (SRS) resource, the configuration including a cyclic shift offset and transmission comb offset ∈ {0, 1, ..., K TC -1}, where is the maximum number of cyclic shifts, and K TC is a transmission comb number, where the SRS resource is associated with multiple antenna ports; determining a cyclic shift offset for each of the plurality of antenna ports based on a first pseudo-random sequence; determining a transmit comb offset for each of the plurality of antenna ports based on a second pseudo-random sequence; and The SRS resources are transmitted based on the cyclic shift offset and the transmission comb offset.

2. The UE according to claim 1, wherein: The first pseudo-random sequence and the second pseudo-random sequence correspond to c(i), where c(i) is defined by the following formula: c(i)=(x1(n+N C )+x2(n+N C ))mod 2, x1(n+31)=(x1(n+3)+x1(n))mod 2, and x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod 2, Among them, N C = 1600 and x1(n) is initialized with x1(0) = 1, x1(n) = 0, n = 1, 2, .., 30, and x2(n) is initialized with express.

3. The UE according to claim 1, wherein: The processor is further configured to determine The cyclic shift offset within a subset of .

4. The UE according to claim 1, wherein: The processor is also configured based on the parameter Knowing l′, we can determine the cyclic shift offset, where is the timeslot number within the frame for the subcarrier spacing configuration μ, and It is the Orthogonal Frequency Division Multiplexing (OFDM) symbol number within the SRS resource.

5. The UE according to claim 4, wherein: The processor is also configured to use to determine the cyclic shift offset, where a≥0 and b≥0 are constant values.

6. The UE according to claim 1, wherein: The processor is further configured to determine {0, 1, . . . , K TC -1} within a subset of the transmission comb offset.

7. The UE according to claim 1, wherein: The processor is also configured based on the parameter Knowing l′, we can determine the transmission comb offset. in: is the timeslot number within the frame for the subcarrier spacing configuration μ, and It is the Orthogonal Frequency Division Multiplexing (OFDM) symbol number within the SRS resource.

8. The UE according to claim 7, wherein: The processor is also configured to use to determine the transmission comb offset, where a≥0 and b≥0 are constant values.

9. A base station (BS), comprising: Transceiver; and A processor is coupled to the transceiver and is configured to: Sending a configuration about a sounding reference signal (SRS) resource, the configuration including a cyclic shift offset and transmission comb offset ∈ {0, 1, ..., K TC -1}, where is the maximum number of cyclic shifts, and K TC is a transmission comb number, wherein SRS resources are associated with multiple antenna ports; and Receive SRS resources, wherein the first pseudo-random sequence indicates a cyclic shift offset of each antenna port in the plurality of antenna ports, and The second pseudo-random sequence indicates a transmission comb offset of each antenna port in the plurality of antenna ports.

10. The BS according to claim 9, wherein: The first pseudo-random sequence and the second pseudo-random sequence correspond to c(i), where c(i) is defined by the following formula: c(i)=(x1(n+N C )+x2(n+N C ))mod 2, x1(n+31)=(x1(n+3)+x1(n))mod 2, and x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod 2, x1(n) is initialized with x1(0)=1, x1(n)=0, n=1, 2, .., 30, and x2(n) is initialized with express.

11. The BS according to claim 9, wherein: The cyclic shift offset is in a subset of .

12. The BS according to claim 9, wherein: The cyclic shift offset is based on the parameter and L′, where is the timeslot number within the frame for the subcarrier spacing configuration μ, and is the orthogonal frequency division multiplexing (OFDM) symbol number within the SRS resource, and The cyclic shift offset is based on Where a≥0 and b≥0 are constant values.

13. The base station according to claim 9, wherein: Transmission comb offset: In {0, 1, …, K TC -1}; or Based on parameters and L′, in: is the timeslot number within the frame for the subcarrier spacing configuration μ, and is the orthogonal frequency division multiplexing (OFDM) symbol number within the SRS resource, and The transmission comb offset is based on Where a≥0 and b≥0 are constant values.

14. A method performed by a user equipment (UE), the method comprising: Receive a configuration regarding a sounding reference signal (SRS) resource, the configuration including a cyclic shift offset and transmission comb offset ∈ {0, 1, ..., K TC -1}, where is the maximum number of cyclic shifts, and K TC is a transmission comb number, where the SRS resource is associated with multiple antenna ports; determining a cyclic shift offset for each of the plurality of antenna ports based on a first pseudo-random sequence; determining a transmit comb offset for each of the plurality of antenna ports based on a second pseudo-random sequence; and The SRS resources are transmitted based on the cyclic shift offset and the transmission comb offset.

15. A method performed by a base station (BS), the method comprising: Sending a configuration about a sounding reference signal (SRS) resource, the configuration including a cyclic shift offset and transmission comb offset ∈ {0, 1, ..., K TC -1}, where is the maximum number of cyclic shifts, and K TC is a transmission comb number, wherein SRS resources are associated with multiple antenna ports; and Receive SRS resources, wherein the first pseudo-random sequence indicates a cyclic shift offset of each antenna port in the plurality of antenna ports, and The second pseudo-random sequence indicates a transmission comb offset of each antenna port in the plurality of antenna ports.

Images