Method and device for enhancing sounding reference signal (SRS) transmission signaling

Abstract

Method, system and device for wireless communication. The method includes: performing sounding reference signal (SRS) transmission between a user equipment and a network base station by obtaining a first transmission power of a first SRS resource and determining a second transmission power of a second SRS resource of the same SRS resource set based on the first transmission power of the first SRS resource; transmitting N parameter sets corresponding to the SRS resource set between the network base station and the user equipment; or transmitting M frequency sounding segments at a symbol between the user equipment and the network base station, wherein each segment of the M segments includes consecutive physical resource blocks (PRBs), and M is a positive integer.

Description

Technical Field

[0001] The present disclosure relates generally to wireless communications and, more particularly, to methods and devices for enhancing sounding reference signal (SRS) transmission signaling. Background Art

[0002] Wireless communication technology is driving the world towards an increasingly interconnected and networked society. High-speed and low-latency wireless communications rely on efficient network resource management and allocation between user equipment and wireless access network nodes (including but not limited to wireless base stations). The next-generation network is expected to provide high-speed, low-latency and ultra-reliable communication capabilities and meet the needs of different industries and users. Sounding reference signals (SRS) can be transmitted between user equipment and base stations to provide the network with a means to estimate the state of the channel for better communication. Summary of the invention

[0003] This document relates to methods, systems, and devices for wireless communications, and more particularly, to methods, systems, and devices for enhancing Sounding Reference Signal (SRS) transmission signaling.

[0004] In one embodiment, the present disclosure describes a method for performing sounding reference signal (SRS) transmission between a user equipment and a network base station. The method includes obtaining, by the user equipment, a first transmission power of a first SRS resource; and determining, by the user equipment, a second transmission power of a second SRS resource based on the first transmission power of the first SRS resource. The first SRS resource and the second SRS resource belong to the same SRS resource set.

[0005] In one embodiment, the present disclosure describes a method for performing sounding reference signal (SRS) transmission between a user equipment and a network base station. The method includes receiving, by the network base station, a first SRS resource having a first transmission power and a second SRS resource having a second transmission power from the user equipment. The user equipment obtains a first transmission power of the first SRS resource, and determines a second transmission power of the second SRS resource based on the transmission power of the first SRS resource, wherein the first SRS resource and the second SRS resource belong to the same SRS resource set.

[0006] In one embodiment, the present disclosure describes a method for performing a sounding reference signal (SRS) transmission between a user equipment and a network base station. The method includes receiving N parameter sets corresponding to an SRS resource set from a network base station by a user equipment. N is a positive integer, and each of the N parameter sets includes at least one of the following: a bandwidth part (BWP) identifier (ID), a channel state information-interference measurement (CSI-IM) resource ID (CSI-IM-ResourceId) or a CSI-IM resource set ID (CSI-IM-ResourceSetID), a non-zero power (NZP) CSI-reference signal (CSI-RS) resource ID or an NZP CSI-RS resource set ID, a CSI-RS resource configuration ID (CSI-ResourceConfigId), and a CSI report setting ID (CSI-ReportConfigId).

[0007] In one embodiment, the present disclosure describes a method for performing a sounding reference signal (SRS) transmission between a user equipment and a network base station. The method includes sending N parameter sets corresponding to an SRS resource set to a user equipment by a network base station. N is a positive integer, and each of the N parameter sets includes at least one of the following: a bandwidth part (BWP) identifier (ID), a channel state information-interference measurement (CSI-IM) resource ID (CSI-IM-ResourceId) or a CSI-IM resource set ID (CSI-IM-ResourceSetID), a non-zero power (NZP) CSI-reference signal (CSI-RS) resource ID or an NZP CSI-RS resource set ID, a CSI-RS resource configuration ID (CSI-ResourceConfigId), and a CSI report setting ID (CSI-ReportConfigId).

[0008] In one embodiment, the present disclosure describes a method for performing sounding reference signal (SRS) transmission between a user equipment and a network base station. The method includes sending, by the user equipment, M frequency sounding segments at a symbol to the network base station. Each segment of the M segments includes consecutive physical resource blocks (PRBs), and M is a positive integer.

[0009] In one embodiment, the present disclosure describes a method for performing sounding reference signal (SRS) transmission between a user equipment and a network base station. The method includes receiving, by the network base station, M frequency sounding segments at a symbol from the user equipment. Each segment of the M segments includes consecutive physical resource blocks (PRBs), and M is a positive integer.

[0010] In some other embodiments, an apparatus for wireless communication may include a memory storing instructions and a processing circuit system in communication with the memory. When the processing circuit system executes the instructions, the processing circuit system is configured to implement the above method.

[0011] In some other embodiments, a device for wireless communication may include a memory storing instructions and a processing circuit system in communication with the memory. When the processing circuit system executes the instructions, the processing circuit system is configured to implement the above method.

[0012] In some other embodiments, a computer-readable medium includes instructions that, when executed by a computer, cause the computer to perform the above method.

[0013] The above and other aspects and embodiments thereof are described in more detail in the drawings, description and claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 An example of a wireless communication system including a radio network node and one or more user equipments is shown.

[0015] Figure 2 An example of a network node is shown.

[0016] Figure 3 An example of a user device is shown.

[0017] Figure 4 A flow chart of a method for wireless communication is shown.

[0018] Figure 5 A flow chart of a method for wireless communication is shown.

[0019] Fig. 6A An example of a 2T4R SRS antenna configuration is shown.

[0020] Figure 6B An example of a 4T6R SRS antenna configuration is shown.

[0021] Figure 7 Another example of a 4T6R SRS antenna configuration is shown.

[0022] Figure 8 A flow chart of a method for wireless communication is shown.

[0023] Fig. 9A A flow chart of a method for wireless communication is shown.

[0024] Fig. 9B A flow chart of a method for wireless communication is shown.

[0025] Fig. 9C A flow chart of a method for wireless communication is shown.

[0026] Fig.9D A flow chart of a method for wireless communication is shown.

[0027] Fig. 10A A flow chart of a method for wireless communication is shown.

[0028] Fig. 10B A flow chart of a method for wireless communication is shown.

[0029] Fig.11A A flow chart of a method for wireless communication is shown.

[0030] Fig. 11B A flow chart of a method for wireless communication is shown.

[0031] Fig. 11C A flow chart of a method for wireless communication is shown.

[0032] Fig.12 A flow chart of a method for wireless communication is shown.

[0033] Fig.13 A diagram showing an example of SRS frequency hopping.

[0034] Fig.14A A flow chart of a method for wireless communication is shown.

[0035] Fig. 14B A flow chart of a method for wireless communication is shown.

[0036] Fig.15 A flow chart of a method for wireless communication is shown.

[0037] Fig.16 A flow chart of a method for wireless communication is shown.

[0038] Fig.17 A diagram showing another example of SRS frequency hopping.

[0039] Fig.18 A flow chart of a method for wireless communication is shown.

[0040] Fig.19 A flow chart of a method for wireless communication is shown. DETAILED DESCRIPTION

[0041] The present disclosure will now be described in detail below with reference to the accompanying drawings, which form a part of the present disclosure and show specific examples of embodiments by way of illustration. However, it is noted that the present disclosure can be implemented in a variety of different forms, and therefore, the subject matter covered or claimed is intended to be interpreted as not being limited to any of the embodiments set forth below.

[0042] Throughout the specification and claims, in addition to the meanings explicitly stated, terms may have suggested or implied subtle meanings in the context. Similarly, the phrases "in one embodiment" or "in some embodiments" as used herein do not necessarily refer to the same embodiment, and the phrases "in another embodiment" or "in other embodiments" as used herein do not necessarily refer to different embodiments. The phrases "in one embodiment" or "in some embodiments" as used herein do not necessarily refer to the same embodiment, and the phrases "in another embodiment" or "in other embodiments" as used herein do not necessarily refer to different embodiments. For example, the claimed subject matter is intended to include, in whole or in part, exemplary embodiments or combinations of embodiments.

[0043] In general, terms can be understood at least in part from usage in context. For example, terms such as "and", "or" or "and / or" as used herein can include multiple meanings, which can depend at least in part on the context in which these terms are used. Typically, "or" if used for an association list (such as A, B or C) is intended to represent A, B and C (used in an inclusive sense here), and A, B or C (used in an exclusive sense here). In addition, the terms "one or more" or "at least one" as used herein (at least in part depending on the context) can be used to describe any feature, structure or characteristic in a singular sense, or can be used to describe a combination of features, structures or characteristics in a plural sense. Similarly, terms such as "one", "an" or "the" can also be understood to convey singular usage or to convey plural usage, which depends at least in part on the context. In addition, the term "based on" or "determined by..." can be understood as not necessarily intended to convey an exclusive set of factors, and can alternatively allow the presence of additional factors that are not necessarily explicitly described, which also depends at least in part on the context.

[0044] The present disclosure describes methods and apparatus for enhancing sounding reference signal (SRS) transmission signaling.

[0045] Sounding reference signal (SRS) transmission between user equipment (UE) and radio network nodes can be used to obtain downlink (DL) channel state information (CSI) and / or uplink (UL) CSI, which can achieve excellent downlink and / or uplink performance. For example, for a time division duplex (TDD) system with antenna calibration, channel reciprocity can be used to measure DL CSI based on uplink SRS measurements, and then achieve multiple input multiple output (MIMO) performance, auxiliary DL beamforming, and / or auxiliary DL precoding.

[0046] An uplink sounding reference signal (SRS) may be a user equipment specific signal and is sent from a user equipment (UE) to a radio network node. SRS capacity may be a problem in the case of a potentially large number of active UEs in a cell served by a radio network node and the mobility of these large number of active UEs. Considering that the transmission power of a UE is typically much lower than that of a radio network node, the UE may be restricted in allocating transmission power to SRS resources. Relatively low power may result in relatively low signal to interference and noise ratio (SINR), which may result in poor measurement of uplink CSI and / or downlink CSI. The present disclosure describes one or more embodiments for addressing at least one or more of the problems discussed above.

[0047] In one embodiment, the present disclosure solves at least one problem of existing methods in which, in order to perform SRS transmission between a user equipment (UE) and a radio network node, concerns may arise about the allocation of transmission power for SRS resources. Existing methods of allocating transmission power to SRS resources may result in unfair downlink (DL) channel state information (CSI).

[0048] In another embodiment, the present disclosure solves at least one problem with existing methods in which concerns may arise about asymmetric interference conditions between downlink (DL) and uplink (UL) for performing SRS transmission between a user equipment (UE) and a radio network node. Existing methods of configuring parameters, such as SRS precoders and / or spatial domain transmission filters, may not be suitable for measuring downlink (DL) channel state information (CSI).

[0049] In another embodiment, the present disclosure solves at least one problem with existing methods, in which concerns may arise about configuring SRS resources for frequency hopping in order to perform SRS transmission between a user equipment (UE) and a radio network node. Existing methods that restrict the distribution of SRS transmissions within an allocated physical resource block (PRB) may be inefficient for performing SRS transmissions and / or measuring downlink (DL) channel state information (CSI).

[0050] Figure 1 A wireless communication system 100 is shown that includes a radio network node 132 and one or more user equipments (UEs) (152, 154, and 156). The radio network node may be a base station, which may be a nodeB (NB, such as an eNB or gNB) in a mobile telecommunication scenario. Each of the UEs may wirelessly communicate with the radio network node via one or more radio channels 140. For example, a first UE 152 may wirelessly communicate with the radio network node 132 via a channel including a plurality of radio channels during a specific time period. Similarly, a second UE 154 and a third UE 156 may wirelessly communicate with the radio network node 132.

[0051] Figure 2 An example base station 200 is shown. The example base station may include wireless transmit / receive (Tx / Rx) circuitry 208 to send / receive communications with UEs and / or other base stations. The base station may also include network interface circuitry 209 to communicate the base station with other base stations and / or a core network (e.g., optical or wired interconnects, Ethernet, and / or other data transmission media / protocols). The base station 200 may optionally include an input / output (I / O) interface 206 to communicate with an operator or the like.

[0052] The base station may also include system circuitry 204. System circuitry 204 may include one or more processors 221 and / or memory 222. Memory 222 may include an operating system 224, instructions 226, and parameters 228. Instructions 226 may be configured for one or more of processors 124 to perform the functions of the base station. Parameters 228 may include parameters that support the execution of instructions 226. For example, the parameters may include network protocol settings, bandwidth parameters, radio frequency mapping assignments, and / or other parameters.

[0053] Figure 3An example UE 300 is shown. UE 300 may be a mobile device, such as a smart phone or a mobile communication module provided in a vehicle. UE 300 may include a communication interface 302, a system circuit system 304, an input / output interface (I / O) 306, a display circuit system 308, and a storage device 309. The display circuit system may include a user interface 310. System circuit system 304 may include any combination of hardware, software, firmware, or other logic / circuitry. System circuit system 304 may be implemented, for example, using one or more systems on a chip (SoC), application specific integrated circuits (ASICs), discrete analog and digital circuits, and other circuit systems. System circuit system 304 may be part of an implementation of any desired functionality in UE 300. In this regard, the system circuit system 304 may include, for example, logic to facilitate: decoding and playing music and video, such as MP3, MP4, MPEG, AVI, FLAC, AC3, or WAV decoding and playback; running applications; accepting user input; saving and retrieving application data; establishing, maintaining, and terminating cellular phone calls or data connections, as an example, for Internet connections; establishing, maintaining, and terminating wireless network connections, Bluetooth connections, or other connections; and displaying relevant information on the user interface 310. The user interface 310 and the input / output (I / O) interface 306 may include a graphical user interface, a touch-sensitive display, tactile feedback or other tactile output, voice or facial recognition input, buttons, switches, speakers, and other user interface elements. Other examples of the I / O interface 306 may include microphones, video and still image cameras, temperature sensors, vibration sensors, rotation and orientation sensors, headphone and microphone input / output jacks, universal serial bus (USB) connectors, memory card slots, radiation sensors (e.g., IR sensors), and other types of inputs.

[0054] refer to Figure 3, the communication interface 302 may include radio frequency (RF) transmit (Tx) and receive (Rx) circuitry 316 that handles the transmission and reception of signals through one or more antennas 314. The communication interface 302 may include one or more transceivers. The transceiver may be a wireless transceiver that includes modulation / demodulation circuitry, digital to analog converters (DACs), shaping tables, analog to digital converters (ADCs), filters, waveform shapers, filters, preamplifiers, power amplifiers, and / or other logic for transmitting and receiving through one or more antennas or (for some devices) through a physical (e.g., wired) medium. The signals transmitted and received may follow any of a variety of formats, protocols, modulations (e.g., QPSK, 16-QAM, 64-QAM, or 256-QAM), frequency channels, bit rates, and encodings. As a specific example, the communication interface 302 may include a transceiver supporting transmission and reception under 2G, 3G, BT, WiFi, Universal Mobile Telecommunications System (UMTS), High Speed ​​Packet Access (HSPA) +, 4G / Long Term Evolution (LTE) and 5G standards. However, the techniques described below are applicable to other wireless communication technologies, whether derived from the Third Generation Partnership Project (3GPP), GSM Association, 3GPP2, IEEE or other partners or standards groups.

[0055] refer to Figure 3 , the system circuit system 304 may include one or more processors 321 and a memory 322. The memory 322 stores, for example, an operating system 324, instructions 326, and parameters 328. The processor 321 is configured to execute instructions 326 for implementing the desired functions of the UE 300. The parameters 328 may provide and specify configuration and operating options for the instructions 326. The memory 322 may also store any BT, WiFi, 3G, 4G, 5G, or other data that the UE 300 will send or has received through the communication interface 302. In various embodiments, the system power of the UE 300 may be provided by a power storage device such as a battery or a transformer.

[0056] The present disclosure describes the following embodiments, which may be partially or completely implemented on the above-mentioned network base station and / or user equipment.

[0057] Example #1

[0058] The present disclosure describes embodiments of methods and apparatus for performing sounding reference signal (SRS) transmission between user equipment and a network base station.

[0059] In one embodiment, reference Figure 4 , method 400 may include: step 410: obtaining, by a user equipment, a first transmission power of a first SRS resource; and step 420: determining, by the user equipment, a second transmission power of a second SRS resource based on the first transmission power of the first SRS resource, wherein the first SRS resource and the second SRS resource belong to the same SRS resource set.

[0060] In another embodiment, reference Figure 5 , method 500 may include: step 510: receiving, by a network base station, a first SRS resource having a first transmission power and a second SRS resource having a second transmission power from a user equipment, wherein the user equipment obtains the first transmission power of the first SRS resource, and determines the second transmission power of the second SRS resource based on the transmission power of the first SRS resource, and the first SRS resource and the second SRS resource belong to the same SRS resource set.

[0061] The SRS resource set may include more than one SRS resource. Each of the more than one SRS resource may include a set of power control parameters. The set of power control parameters may include at least one of alpha, pathlossReferenceRS, p0, or SRS-PowerControlAdjustmentStates. The SRS resource may be configured with multiple SRS ports, and the UE may divide the transmission power across the configured SRS ports.

[0062] In one embodiment, for example but not limited to, the UE may transmit uplink signals through two transmit (Tx) antennas and may receive downlink signals through four receive (Rx) antennas. In order to obtain complete downlink channel information, the UE may configure the SRS antenna as 2T4R for antenna switching.

[0063] refer to Fig. 6A As an example of a 2T4R SRS antenna configuration, an SRS resource set 610 may include a first SRS resource 620 and a second SRS resource 640. The first SRS resource 620 may include two SRS ports. The second SRS resource 640 may include two SRS ports.

[0064] The first SRS resource 620 may include a first SRS port Tx0 in 622 and a second SRS port Tx1 in 624. In 622, the first SRS port Tx0 may be associated with the first antenna port Rx0. In 624, the second SRS port Tx1 may be associated with the second antenna port Rx1.

[0065] The second SRS resource 640 may include a first SRS port Tx0 in 642 and a second SRS port Tx1 in 644. In 642, the first SRS port Tx0 may be associated with the third antenna port Rx2. In 644, the second SRS port Tx1 may be associated with the fourth antenna port Rx3.

[0066] In the existing method, the UE can allocate equal transmission power to each SRS resource. And can also divide the transmission power evenly across the configured SRS ports That is, in Fig. 6A In 2T4R, antenna switching is used, and each SRS port in the SRS resource set can be configured with the same transmission power.

[0067] In another embodiment, the UE may have higher capabilities and support more Rx antennas and / or more Tx antennas. For example, but not limited to, the UE may support six Tx antennas and eight Rx antennas. As another example, in order to obtain complete downlink channel information, the UE may configure the SRS antenna to 4T6R for antenna switching.

[0068] refer to Figure 6B As an example of a 4T6R SRS antenna configuration, the SRS resource set 650 may include a first SRS resource 660 and a second SRS resource 680. The first SRS resource 660 may include four SRS ports, and the second SRS resource 680 may include two SRS ports. In one embodiment, when the UE configures the SRS antenna as 4T6R, the first SRS resource and the second SRS resource may be configured to be transmitted in different symbols. The SRS ports of the second SRS resource 680 may be associated with different UE antenna ports than the SRS ports of the first SRS resource 660.

[0069] refer to Figure 6B, the first SRS resource 660 may include a first SRS port Tx0 in 662, a second SRS port Tx1 in 664, a third SRS port Tx2 in 666, and a fourth SRS port Tx3 in 668. In 662, the first SRS port Tx0 may be associated with the first antenna port Rx0. In 664, the second SRS port Tx1 may be associated with the second antenna port Rx1. In 666, the third SRS port Tx2 may be associated with the third antenna port Rx2. In 668, the fourth SRS port Tx3 may be associated with the fourth antenna port Rx3. The second SRS resource 680 may include a first SRS port Tx0 in 682 and a second SRS port Tx1 in 684. In 682, the first SRS port Tx0 may be associated with the fifth antenna port Rx4. In 684, the second SRS port Tx1 may be associated with the sixth antenna port Rx5.

[0070] When the UE includes a 4T6R SRS antenna configuration, there may be different SRS antenna configurations. Figure 7 As another example of a 4T6RSRS antenna configuration, the SRS resource set 710 may include a first SRS resource 720 including two SRS ports and a second SRS resource 740 including four SRS ports. The first SRS resource 720 may include a first SRS port Tx0 in 722 and a second SRS port Tx1 in 724. The second SRS resource 740 may include a first SRS port Tx0 in 742, a second SRS port Tx1 in 744, a third SRS port Tx2 in 746, and a fourth SRS port Tx3 in 748.

[0071] For the above two examples, the SRS resources in the same SRS resource set may include different numbers of SRS ports or different numbers of antenna ports. A problem may occur when the method of allocating transmission power for SRS resources results in unequal transmission power for each SRS port in different SRS resources in the same SRS resource set, and this problem may result in unfair measurement of DL CSI for each Rx antenna. For example, referring to Figure 7 , the first SRS resource 720 includes two SRS ports, and the second SRS resource 740 includes four SRS ports. In the method, when the SRS power control is based on the SRS resource set 710, the same linear SRS transmission power For all SRS resources (720 and 740) in the same SRS resource set 710, the transmission power of the first SRS resource is the same as the transmission power of the second SRS resource. Because the first SRS resource 720 has two ports, each port in the first SRS resource 720 has Since the second SRS resource 740 has four ports, each port in the second SRS resource 740 has Different powers of ports in the first SRS resource and the second SRS resource may result in unfair measurement of the DL CSI of each Rx antenna.

[0072] The present disclosure describes embodiments that address the above-mentioned shortcomings. Figure 8 In step 830, UE 810 may obtain a first transmission power of a first SRS resource of the SRS resource set. The first transmission power may be a linear value of the determined transmission power P. In one embodiment, the determined transmission power may be P on the active UL bandwidth part (BWP) b of carrier f of serving cell c. SRS,b,f,c (i,qs,l), where i is the SRS transmission opportunity, q s refers to the SRS resource set provided by SRS-ResourceSet and SRS-ResourceSetId, and l is the index.

[0073] At step 840 , the UE may determine a second transmission power of a second SRS resource based on a first transmission power of a first SRS resource of the SRS resource set.

[0074] refer to Fig. 9A As an implementation of step 840, in step 910A, the UE may determine the first transmission power of the first SRS resource as And in step 920A, the UE may determine the second transmission power of the second SRS resource as N times, where N is a positive integer. For example, but not limited to, N may include 1, 2, 3, 4, 8, and 10. The first SRS resource may include a first number of ports; the second SRS resource includes a second number of ports; and the second number is N times the first number.

[0075] refer to Fig. 9B As another implementation of step 840, in step 910B, the UE may determine the first transmission power of the first SRS resource as And in step 920B, the UE may determine the second transmission power of the second SRS resource as 1 / N times, where N is a positive integer. For example, but not limited to, N may include 1, 2, 3, 4, 8, and 10. The first SRS resource may include a first number of ports; the second SRS resource includes a second number of ports; and the second number is 1 / N times the first number.

[0076] refer to Fig. 9CAs another implementation, step 840 may further include step 930: evenly allocating the first transmission power of the first SRS resource across a first number of ports in the first SRS resource. Fig.9D As another implementation, step 840 may further include step 940: evenly distributing the second transmission power of the second SRS resource across a second number of ports in the second SRS resource.

[0077] refer to Figure 8 In step 860, UE 810 may send a first SRS resource with a first transmission power and a second SRS resource with a second transmission power to network base station 820. Network base station 820 may receive the first SRS resource with the first transmission power sent by the UE, and may receive the second SRS resource with the second transmission power sent by the UE.

[0078] In the embodiments described in the present disclosure, the linear value of the transmission power of the second SRS resource can be determined as N times or 1 / N times the transmission power of the first SRS resource in the same SRS resource set. This determination can depend on whether the number of SRS ports in the second SRS resource is N times or 1 / N times the number of SRS ports in the first SRS resource.

[0079] As Figure 6B Taking the 4T6R configuration shown in the figure as an example, N may be equal to 2, and depending on the number of ports in the second SRS resource 680 being 1 / 2 of the number of ports in the first SRS resource 660, when the linear value of the transmission power of the first SRS resource 660 is When , the linear value of the transmission power of the second SRS resource 680 can be

[0080] As Figure 7 The 4T6R configuration shown is another example, N may be equal to 2, and this depends on the number of ports in the second SRS resource 740 being twice the number of ports in the first SRS resource 720, when the linear value of the transmission power of the first SRS resource 720 is When the linear value of the transmission power of the second SRS resource 740 can be Example #2

[0081] The present disclosure describes embodiments of methods and apparatus for performing sounding reference signal (SRS) transmission between user equipment and a network base station.

[0082] For the downlink and uplink between the user equipment and the network base station, channel reciprocity may be useful for measuring downlink CSI based on uplink SRS transmission. In existing methods, due to asymmetric interference conditions between the downlink and uplink, the SRS precoder and / or the spatial domain transmission filter may not be suitable for downlink CSI measurement. As an example, the uplink bandwidth part (BWP) for SRS transmission from the UE to the network base station may overlap with the downlink BWP and may be narrower (or smaller) than the downlink BWP. As another example, there may be no overlap between the uplink BWP and the downlink BWP for SRS transmission. Under these conditions, the SRS precoder can be calculated taking into account the downlink interference, which can improve the downlink CSI measurement based on the uplink SRS transmission.

[0083] In one embodiment, reference Fig. 10A , method 1000 may include step 1010: receiving, by a user equipment, N parameter sets corresponding to an SRS resource set from a network base station.

[0084] In one embodiment, reference Fig.11A , method 1100 may include step 1110: a network base station sends N parameter sets corresponding to an SRS resource set to a user equipment.

[0085] In one embodiment, N may be equal to 1 and may have only one parameter set. The parameter set may be the same parameter set for one or more SRS resources in the SRS resource set. For example, when the SRS resource set includes a first SRS resource and a second SRS resource, the first SRS resource and the second SRS resource may share the same parameter set.

[0086] In another embodiment, the SRS resource set may include N number of SRS resources, and the number N>1. Each of the N parameter sets may correspond to each SRS resource of the SRS resource set. For example, when N=2, the SRS resource set may include a first SRS resource and a second SRS resource. The N parameter sets corresponding to the SRS resource set may include a first parameter set corresponding to the first SRS resource and a second parameter set corresponding to the second SRS resource.

[0087] refer to Fig. 10B , method 1000 may further include step 1020: receiving, by the user equipment, each parameter set in a beam reference configured by a network base station, wherein the beam reference includes a transmission configuration indicator (TCI) or a spatial relationship configuration.

[0088] refer to Fig. 11B , method 1100 may also include step 1120: configuring, by a network base station, each parameter set in a beam reference, wherein the beam reference includes at least one of a transmission configuration indicator (TCI) or a spatial relationship configuration.

[0089] refer to Fig. 11C , method 1100 may further include step 1130: the network base station sends a transmission configuration indicator (TCI) or a spatial relationship configuration to the user equipment.

[0090] In another embodiment, in a higher frequency band, each SRS resource may be configured with a beam reference. For an example, the higher frequency band may include frequency range 2 (FR2) between 24.25 GHz and 52.6 GHz. The beam reference may be used to notify quasi co-location (QCL) information or spatial relationship parameters, which may include a spatial relationship (e.g., named SRS-SpatialRelationInfo) or TCI. The UE may transmit the SRS resource using the same spatial domain transmission filter used for transmission or reception of a reference signal (RS) configured in the beam reference. For example, the RS may include a downlink RS and / or an uplink SRS. The beam reference may be used to determine analog beamforming for the SRS.

[0091] refer to Fig.12 In step 1230, the network base station 1220 may configure each parameter set in the beam reference. In step 1240, the network base station 1220 may send N parameter sets corresponding to the SRS resource set to the UE 1210.

[0092] In one embodiment, the parameter set may be configured for purposes other than quasi co-location (QCL) information or spatial filtering information. In another embodiment, the parameter set may be configured for interference estimation when calculating an SRS precoder.

[0093] This parameter set may include an additional BWP identification (ID). In one embodiment, there may be an existing BWP ID configured under the beam reference, and the additional BWP ID may be independent of the existing BWP ID configured under the beam reference. The BWPID may be used to determine the downlink (DL) BWP location for interference detection. When the UE calculates the SRS precoder, for the DLBWP, the UE may avoid using precoders associated with severe interference.

[0094] Additionally or alternatively, the parameter set may include a channel state information-interference measurement (CSI-IM) resource ID (CSI-IM-ResourceId) or a CSI-IM resource set ID (CSI-IM-ResourceSetID).

[0095] Additionally or alternatively, the parameter set may include an additional non-zero power (NZP) CSI-reference signal (CSI-RS) resource ID or NZP CSI-RS resource set ID. The network base station may configure specific interference resources or resource set IDs to reduce the complexity of the UE. The specific interference resource or resource set ID may include a CSI-IM or NZP CSI-RS resource ID or NZP CSI-RS resource set ID. When the UE calculates the SRS precoder, for the configured interference resource or resource set, the UE can avoid using a precoder associated with severe interference. In one embodiment, there may be an existing CSI-RS ID configured under beam reference, and the additional NZP CSI-RS resource ID may be independent of the existing CSI-RS ID configured under beam reference.

[0096] Additionally or alternatively, the parameter set may include a CSI-RS resource configuration ID (CSI-ResourceConfigId). The RS configured by the CSI-RS resource configuration ID may indicate a specific downlink interference resource or resource set.

[0097] Additionally or alternatively, the parameter set may include a CSI report setting ID (CSI-ReportConfigId). The csi-IM-ResourcesForInterference or nzp-CSI-RS-ResourcesForInterference configured by the CSI report setting ID may be used to indicate a specific DL interfering resource or resource set. When the UE calculates the SRS precoder, for the interfering resource or resource set, the UE may avoid using a precoder associated with severe interference.

[0098] Example #3

[0099] Frequency hopping is a special transmission technique for sending data (downlink and / or uplink) while changing the carrier frequency in a certain pattern. In order to more efficiently transmit SRS between user equipment and network base stations, the present disclosure describes embodiments for configuring SRS frequency hopping for SRS resources or SRS resource sets.

[0100] In existing methods, SRS is transmitted on one or more consecutive physical resource blocks (PRBs) in a given time slot. SRS is evenly distributed in one or more consecutive PRBs. Zadoff-Chu sequence (ZC) or computer generated sequence (CGS) is used for low peak-to-average power ratio (PAPR). This limitation in existing methods may result in long frequency hopping cycles, even when there is no PAPR problem for the user equipment.

[0101] The present disclosure describes embodiments of methods and apparatus for performing sounding reference signal (SRS) transmission between user equipment and a network base station to address at least some of the shortcomings of existing approaches.

[0102] In one embodiment, more than one frequency detection segment may be supported in a given time slot to obtain fast wideband frequency detection. The number of segments may be M, where M≥2. Each frequency detection segment may include K consecutive PRBs, where K≥1.

[0103] For example, refer to Fig.13 , a first frequency detection segment 1310 (segment 0) and a second frequency detection segment 1320 (segment 1) may be supported at a given time. In a first time slot 1330 (time slot 0), the first segment 1310 may include a first frequency hopping block 1351. The first frequency hopping block 1351 may include four consecutive PRBs (1351-1, 1351-2, 1351-3, and 1351-4). In the first time slot 1330 (time slot 0), the second segment 1310 may include a second frequency hopping block 1352, which may include four consecutive PRBs.

[0104] In the second time slot 1340 (time slot 1), the first segment 1310 may include a third frequency hopping block 1353, which may include four consecutive PRBs. In a comparison between the PRBs in the first segment 1310 at the first time slot 1330 and the PRBs in the first segment 1310 at the second time slot 1340, the first frequency detection segment 1310 may hop from the first frequency hopping block 1351 to the third frequency hopping block 1353.

[0105] In the second time slot 1340 (time slot 1), the second segment 1320 may include a fourth frequency hopping block 1354, which may include four consecutive PRBs. In a comparison between the PRBs in the second segment 1320 at the first time slot 1330 and the PRBs in the second segment 1320 at the second time slot 1340, the second frequency detection segment 1320 may hop from the second frequency hopping block 1352 to the fourth frequency hopping block 1354.

[0106] refer to Fig.13 , the entire wideband frequency can be detected within two time slots, which leads to a significant improvement in efficiency considering that the existing method may require four time slots to detect the entire wideband frequency. When M is limited, for example, M is less than a preset threshold, the complete ZC or CGS sequence can be maintained in each segment of the detection frequency, and thus the PAPR degradation can be minimized or negligible.

[0107] In one embodiment, reference Fig.14A, method 1400 may include step 1410: the user equipment sends M frequency detection segments at a symbol to a network base station, wherein each of the M segments includes consecutive physical resource blocks (PRBs), and M is a positive integer.

[0108] In one embodiment, reference Fig.15 , the method 1500 may include step 1510: receiving, by a network base station from a user equipment, M frequency detection segments at a symbol, wherein each segment of the M segments includes consecutive physical resource blocks (PRBs), and M is a positive integer.

[0109] In one embodiment, reference Fig. 14B , method 1400 may optionally include step 1420: configuring, by the user equipment, M parameter sets corresponding to the SRS resource set or the SRS resource, where M>1. Each of the M parameter sets may correspond to each of the M frequency detection segments. Depending on the relevant parameters to which they correspond, different frequency detection segments may include separate frequency hopping.

[0110] As an example, the UE may configure M parameter sets corresponding to an SRS resource; and configure another M parameter sets corresponding to another SRS resource. As another example, the UE may configure M parameter sets corresponding to an SRS resource set; and when the SRS resource set includes multiple SRS resources, the multiple SRS resources share the same parameter set.

[0111] refer to Fig.16 In step 1630, UE 1610 may configure M parameter sets corresponding to an SRS resource set or an SRS resource, where M>1; and in step 1640, UE 1610 may send M frequency detection segments at a symbol to network base station 1620.

[0112] One or each of the M parameter sets may include all or part of the following parameters for frequency hopping.

[0113] These parameters may include a frequency domain position (FreqDomainPosition). The frequency domain position may be one of the higher-level parameters that specifies the starting position of the SRS transmission in the frequency domain and may be named n RRC For example, but not limitation, the frequency domain position may include a range of values ​​between 0 and 67 (inclusive).

[0114] Optionally and / or alternatively, the parameter may include a frequency domain shift (FreqDomainShift). The frequency domain shift may be one of the higher layer parameters. FreqDomainShift may include an integer between 0 and 268 (inclusive).

[0115] Optionally and / or alternatively, the parameter may include frequency hopping (FreqHopping). Frequency hopping may be one of the higher layer parameters. Frequency hopping may include all or part of the following: a field of c-SRS, a field of b-SRS, or a field of b-hop.

[0116] Optionally and / or alternatively, the parameter may include a sequence identifier (SequenceID) for the SRS. The sequence identifier may be one of the higher layer parameters.

[0117] Optionally and / or alternatively, the parameter may include a transmission comb (TransmissionComb). TransmissionComb may be one of the higher layer parameters, and may include at least one of the following: comb size, comb offset, or cyclic shift.

[0118] In another embodiment, there may be other parameters configured for an SRS resource or a set of SRS resources. These parameters may be shared for each of the M frequency sounding segments.

[0119] refer to Fig.17 In one embodiment, a UE may configure two SRS parameter sets corresponding to a first frequency detection segment 1710 (segment 0) and a second frequency detection segment 1720 (segment 1). Each of the two parameter sets may include a frequency domain position (FreqDomainPosition). For example, the frequency domain position of the first parameter set includes FreqDomainPosition_0 for the first segment 1710 as n RRC (0) 1712; and the frequency domain position of the second parameter set includes FreqDomainPosition_1 for the second segment 1720 as n RRC (1)1722.

[0120] refer to Fig.17 In the first time slot 1730 (time slot 0), the first segment 1710 may include a first frequency hopping block 1751. The first frequency hopping block 1751 may include four consecutive PRBs (1751-1, 1751-2, 1751-3, and 1751-4). In the first time slot 1730 (time slot 0), the second segment 1710 may include a second frequency hopping block 1752, which may include four consecutive PRBs.

[0121] In the second time slot 1740 (time slot 1), the first segment 1710 may include a third frequency hopping block 1753, which may include four consecutive PRBs. In a comparison between the PRBs in the first segment 1710 at the first time slot 1730 and the PRBs in the first segment 1710 at the second time slot 1740, the first frequency detection segment 1710 may hop from the first frequency hopping block 1751 to the third frequency hopping block 1753.

[0122] In the second time slot 1740 (time slot 1), the second segment 1720 may include a fourth frequency hopping block 1754, which may include four consecutive PRBs. In a comparison between the PRBs in the second segment 1720 at the first time slot 1730 and the PRBs in the second segment 1720 at the second time slot 1740, the second frequency detection segment 1720 may hop from the second frequency hopping block 1752 to the fourth frequency hopping block 1754.

[0123] In one embodiment, separate frequency modulation can be supported between different frequency detection segments. Fig.17 , the frequency domain position n of the first segment 1710 RRC (0) 1712 may be different from the frequency domain position n of the second segment 1720 RRC (1) 1722. The starting frequency hopping position subband of the first segment 1710 may be different from the starting frequency hopping position subband of the second segment 1720. In another embodiment, there may be no overlap between different frequency detection segments. In another embodiment, the frequency hopping C of the first segment 1710 may be different from the starting frequency hopping position subband of the second segment 1720. SRS 1714 can be combined with the frequency hopping C of the second segment 1720 SRS 1724 are the same. In another embodiment, other parameters in the two parameter sets (including the transmission comb, cyclic shift, number of symbols and / or repetition factor) may be the same for the two frequency detection segments.

[0124] In another embodiment, reference Fig.18 The method 1400 may optionally include step 1810: the user equipment calculates a set of frequency hopping numbers corresponding to the M frequency detection segments. The set of frequency hopping numbers may include M frequency hopping numbers.

[0125] In one embodiment, a single parameter (M) may be introduced for each SRS resource in the SRS resource set. Based on this single parameter (M), the UE may calculate M frequency hopping numbers corresponding to the M frequency detection segments. In another embodiment, a single parameter (M) may be introduced for the SRS resource set, and the single parameter (M) may be shared between one or more SRS resources in the SRS resource set.

[0126] Reference Fig.19In step 1930, UE 1910 may calculate M frequency hopping numbers corresponding to M frequency detection segments; and in step 1940, UE 1910 may send M frequency detection segments at symbols to network base station 1920.

[0127] In an implementation of M=1, there may be only one frequency segment. SRS The number of SRS transmissions can be counted. There can be a hopping number at a given symbol. For the case of SRS resources configured as non-periodic by higher-level parameters (e.g., resourceType), n SRS Can be For the case where the SRS resource is configured as periodic or semi-static by the high-level parameter resourceType, the SRS counter (n SRS ) can be determined by the following formula

[0128]

[0129] when When the SRS counter (n SRS ) (which can also be a frequency hopping number when there is only one frequency segment) can be Increase by 1 and increase by 1.

[0130] In another embodiment where M>1, there may be more than one frequency segment, and the corresponding frequency hopping number may vary with the Increase M by 1. The new (or updated) set of hopping numbers can be composed of n' SRS =M·n SRS +{0,1...,M-1} OK.

[0131] At a given symbol, the new set of hopping numbers (n′ SRS ) can include M·n SRS , M·n SRS +1...M·n SRS +M-1. Corresponding to M frequency segments, there may be M number of frequency hopping numbers in the new set. For example, when M=3, the new set of frequency hopping numbers (n′ SRS ) includes three frequency hopping numbers 3n SRS , 3n SRS +1 and 3n SRS +2. Frequency hopping number 3n SRS Can correspond to the first frequency segment; frequency hopping number 3n SRS +1 may correspond to the second frequency segment; 3n SRS +2 may correspond to the third frequency segment. SRS It can be an SRS counter and is determined by the above formula.

[0132] The present disclosure describes methods, apparatus, and computer-readable media for wireless communications. The present disclosure addresses the problem of SRS transmission signaling between user equipment and base stations. The methods, apparatus, and computer-readable media described in the present disclosure can facilitate the performance of SRS transmissions and enhance SRS signaling between user equipment and base stations, thereby improving efficiency and overall performance. The methods, apparatus, and computer-readable media described in the present disclosure can improve the overall efficiency of wireless communication systems.

[0133] References throughout this specification to features, advantages, or similar language do not imply that all features and advantages that may be achieved using the present solution should or are included in any single embodiment of the present solution. Rather, language referencing features and advantages is understood to mean that a particular feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of the present solution. Thus, throughout this specification, discussion of features and advantages and similar language may, but do not necessarily, refer to the same embodiment.

[0134] Additionally, in one or more embodiments, the features, advantages, and characteristics of the present solution may be combined in any suitable manner. In view of the description herein, one of ordinary skill in the relevant art will recognize that the present solution may be practiced without one or more of the specific features or advantages of a particular embodiment. In other cases, additional features and advantages may be recognized in certain embodiments that may not be present in all embodiments of the present solution.

Claims

1. A method for wireless communication, comprising: The following steps are used to perform sounding reference signal (SRS) transmission between the user equipment and the network base station: Obtaining, by the user equipment, a first transmission power of a first SRS resource; Determining, by the user equipment, a second transmission power of a second SRS resource based on a first transmission power of the first SRS resource, wherein the first SRS resource and the second SRS resource belong to the same SRS resource set; as well as One or more parameter sets in a beam reference configured by the network base station are received by the user equipment, wherein the beam reference includes a transmission configuration indicator TCI or a spatial relationship configuration, and wherein the one or more parameter sets include a bandwidth part identifier corresponding to location information associated with a downlink bandwidth part, and are configured for interference estimation and detection based on the downlink bandwidth part.

2. The method according to claim 1, further comprising: The user equipment determines the first transmission power of the first SRS resource as as well as The user equipment determines the second transmission power of the second SRS resource as N times, where N is a positive integer.

3. The method according to claim 1 or 2, wherein: The first SRS resource includes a first number of ports; The second SRS resource includes a second number of ports; and The second number is N times the first number.

4. The method according to claim 1, further comprising: The user equipment determines the first transmission power of the first SRS resource as as well as The user equipment determines the second transmission power of the second SRS resource as 1 / N times of .

5. The method according to claim 1 or 4, wherein: The first SRS resource includes a first number of ports; The second SRS resource includes a second number of ports; and The second number is 1 / N times the first number.

6. The method according to claim 3, further comprising: The first transmission power of the first SRS resource is evenly distributed by the user equipment across the first number of ports.

7. The method according to claim 3, further comprising: The second transmission power of the second SRS resource is evenly distributed by the user equipment across the second number of ports.

8. The method according to claim 2 or 4, wherein: N is equal to 2.

9. The method according to claim 1 or 2, wherein: The user equipment's capabilities include 4 transmit antennas and 6 receive antennas (4T6R) for antenna switching.

10. A method for wireless communication, comprising: The following steps are used to perform sounding reference signal (SRS) transmission between the user equipment and the network base station: Receiving, by the network base station, a first SRS resource having a first transmission power and a second SRS resource having a second transmission power from the user equipment, wherein the user equipment obtains the first transmission power of the first SRS resource, and determines the second transmission power of the second SRS resource based on the transmission power of the first SRS resource, and the first SRS resource and the second SRS resource belong to the same SRS resource set; as well as One or more parameter sets in a beam reference are configured by the network base station, wherein the beam reference includes a transmission configuration indicator TCI or a spatial relationship configuration, and wherein the one or more parameter sets include a bandwidth part identifier corresponding to location information associated with a downlink bandwidth part, and are configured for interference estimation and detection based on the downlink bandwidth part.

11. The method according to claim 10, wherein: The user equipment determines a first transmission power of the first SRS resource as as well as The user equipment determines a second transmission power of the second SRS resource as N times, where N is a positive integer.

12. The method according to claim 10 or 11, wherein: The first SRS resource includes a first number of ports; The second SRS resource includes a second number of ports; and The second number is N times the first number.

13. The method of claim 10, wherein: The user equipment determines a first transmission power of the first SRS resource as as well as The user equipment determines a second transmission power of the second SRS resource as 1 / N times of .

14. The method according to claim 10 or 13, wherein: The first SRS resource includes a first number of ports; The second SRS resource includes a second number of ports; and The second number is 1 / N times the first number.

15. The method of claim 12, wherein: The user equipment evenly distributes the first transmission power of the first SRS resource across the first number of ports; and The user equipment evenly distributes the second transmission power of the second SRS resource across the second number of ports.

16. The method according to claim 11 or 13, wherein: N is equal to 2.

17. The method according to claim 10 or 11, wherein: The user equipment's capabilities include 4 transmit antennas and 6 receive antennas (4T6R) for antenna switching.

18. A wireless communication device, comprising a processor and a memory, wherein the processor is configured to read a code from the memory and implement the method according to any one of claims 1 to 17.

19. A computer program product comprising computer program code stored thereon, which, when executed by a processor, causes the processor to carry out the method of any one of claims 1 to 17.

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