Method and apparatus for enhanced sounding reference signal (SRS) transmission signaling

Abstract

Methods, systems, and instrumentalities are provided 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 transmit power of a first SRS resource and determining a second transmit power of a second SRS resource according to the first transmit power of the first SRS resource in a same SRS resource set; transmitting N sets of parameters corresponding to the SRS resource set between the network base station and the user equipment; or transmitting a sounding reference signal of M frequency domain intervals on a symbol between the user equipment and the network base station, where each of the M intervals includes contiguous physical resource blocks (PRBs), and M is a positive integer.

Description

TECHNICAL FIELD

[0001] The present disclosure relates generally to wireless communications, and more specifically to methods and apparatuses for enhanced sounding reference signal (SRS) transmission signaling. BACKGROUND

[0002] Wireless communication technology is driving the world towards a more connected and networked society. High-speed and low-latency wireless communication relies on efficient network resource management and allocation between user equipment and wireless access network nodes, including but not limited to wireless base stations. New generation networks are expected to provide high-speed, low-latency and ultra-reliable communication capabilities to meet the needs of different industries and users. Sounding reference signals (SRS) can be transmitted between user equipment and base stations to provide a method for the network to estimate channel state, achieving better communication. SUMMARY

[0003] The present disclosure relates generally to methods, systems and apparatuses for wireless communications, and more specifically to methods, systems and apparatuses for enhanced 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; determining, by the user equipment, a second transmission power of a second SRS resource according to the first transmission power of the first SRS resource. The first SRS resource and the second SRS resource belong to a 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 from the user equipment, a first SRS resource with a first transmission power and a second SRS resource with a second transmission power. The user equipment obtains the first transmission power of the first SRS resource and determines the second transmission power of the second SRS resource according to the transmission power of the first SRS resource, the first SRS resource and the second SRS resource belonging to a same SRS resource set.

[0006] 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 user equipment from the network base station, N sets of parameters corresponding to a set of SRS resources. N is a positive integer, and each set of the N sets of parameters comprises at least one of a bandwidth part (BWP) identity (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 a NZP CSI-RS resource set ID, a CSI-RS resource configuration ID (CSI-ResourceConfigId), and a CSI reporting setting ID (CSI-ReportConfigId).

[0007] 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 transmitting, by the network base station to the user equipment, N sets of parameters corresponding to a set of SRS resources. N is a positive integer, and each set of the N sets of parameters comprises at least one of a bandwidth part (BWP) identity (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 a NZP CSI-RS resource set ID, a CSI-RS resource configuration ID (CSI-ResourceConfigId), and a CSI reporting 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 transmitting, by the network base station to the user equipment, N sets of parameters corresponding to a set of SRS resources. N is a positive integer, and each set of the N sets of parameters comprises at least one of a bandwidth part (BWP) identity (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 a NZP CSI-RS resource set ID, a CSI-RS resource configuration ID (CSI-ResourceConfigId), and a CSI reporting setting ID (CSI-ReportConfigId).

[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 transmitting, by the network base station to the user equipment, N sets of parameters corresponding to a set of SRS resources. N is a positive integer, and each set of the N sets of parameters comprises at least one of a bandwidth part (BWP) identity (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 a NZP CSI-RS resource set ID, a CSI-RS resource configuration ID (CSI-ResourceConfigId), and a CSI reporting setting ID (CSI-ReportConfigId).

[0010] In some other embodiments, an apparatus for wireless communication can include a memory storing instructions and processing circuitry in communication with the memory. When the processing circuitry executes the instructions, the processing circuitry is configured to perform the above-described method.

[0011] In some other embodiments, an apparatus for wireless communication can include a memory storing instructions and processing circuitry in communication with the memory. When the processing circuitry executes the instructions, the processing circuitry is configured to perform the above-described 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-described method.

[0013] The above-described and other aspects are more fully set forth in the accompanying drawings, description, and claims. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 An example of a wireless communication system including one wireless 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 equipment is shown.

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

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

[0019] Figure 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 flowchart of a method for wireless communication is shown.

[0023] FIG. 9 shows a flowchart of a method for wireless communication.

[0024] Figure 9A A flowchart of a method for wireless communication is shown.

[0025] Figure 9BA flow diagram of a method for wireless communication is shown.

[0026] Figure 9C A flow diagram of a method for wireless communication is shown.

[0027] Figure 9D A flow diagram of a method for wireless communication is shown.

[0028] Figure 10A A flow diagram of a method for wireless communication is shown.

[0029] Figure 10B A flow diagram of a method for wireless communication is shown.

[0030] Figure 11A A flow diagram of a method for wireless communication is shown.

[0031] Figure 11B A flow diagram of a method for wireless communication is shown.

[0032] Figure 11C A flow diagram of a method for wireless communication is shown.

[0033] Figure 12 A flow diagram of a method for wireless communication is shown.

[0034] Figure 13 A diagram showing an example of SRS frequency hopping is shown.

[0035] Figure 14A A flow diagram of a method for wireless communication is shown.

[0036] Figure 14B A flow diagram of a method for wireless communication is shown.

[0037] Figure 15 A flow diagram of a method for wireless communication is shown.

[0038] Figure 16 A flow diagram of a method for wireless communication is shown.

[0039] Figure 17 A diagram showing another example of SRS frequency hopping is shown.

[0040] Figure 18 A flow diagram of a method for wireless communication is shown.

[0041] Figure 19 A flow diagram of a method for wireless communication is shown. DETAILED DESCRIPTION

[0042] The present disclosure will be described in detail below with reference to the attached drawings, which are offered as exemplary examples of embodiments of the present disclosure. It should be noted, however, that the present disclosure can be embodied in a multitude of different forms and, accordingly, the subject matter encompassed by or required of the claimed subject matter is not intended to be limited to the particular examples set forth below.

[0043] Throughout this specification, the term can have slightly different meanings in different contexts, which can be suggested or implied by the context of the term. Likewise, the phrase "in one embodiment" or "in some embodiments" as used herein does not necessarily refer to the same embodiment, although it can. The phrase "in another embodiment" or "in other embodiments" as used herein does not necessarily refer to a different embodiment, although it can. The phrase "in one implementation" or "in some implementations" as used herein does not necessarily refer to the same implementation, although it can. For example, claimed subject matter is intended to cover any combination of exemplary embodiments or implementations.

[0044] In general, the term can be understood at least in part differently based on the context in which the term is used. For example, terms such as "and", "or", or "and / or" as used herein can include a variety of meanings that can depend at least in part upon the context in which such terms are used. Typically, "or" if used to associate a list, such as A, B, or C, is intended to mean A, B, and C, here used in the inclusive sense, as well as A, B, or C, here used in the exclusive sense. In addition, the term "one or more" or "at least one" as used herein, depending at least in part upon context, can be used to describe any feature, structure, or characteristic in the singular or can be used to describe combinations of features, structures or characteristics. Similarly, terms such as "a", "an", or "the" again, depending at least in part upon context, can be understood to convey a singular usage or a plural usage, which can depend at least in part upon the context in which such terms are used. Further, the term "based on" or "determined based on" can be understood as not necessarily requiring explicit description of a set of factors from which the description can be made, but instead can allow for consideration of additional factors not necessarily expressly described, again, at least in part depending on context.

[0045] The present disclosure describes methods and apparatuses for enhanced sounding reference signal (SRS) transmission signaling.

[0046] Sounding reference signal (SRS) transmissions between a user equipment (UE) and a wireless network node can be used to obtain downlink (DL) channel state information (CSI) and / or uplink (UL) CSI, which can enable excellent downlink and / or uplink performance. For example, for time division duplex (TDD) systems with antenna calibration, channel reciprocity can be used to measure DL CSI from uplink SRS measurements to enable multiple input multiple output (MIMO) performance, to assist DL beamforming, and / or to assist DL precoding.

[0047] Uplink sounding reference signals (SRS) can be user equipment specific signals and are transmitted from a user equipment (UE) to a wireless network node. Due to the potentially large number of active UEs in a cell served by the wireless network node and the mobility of these large number of active UEs, SRS capacity can be an issue. Given that the transmit power of a UE is typically much lower than the transmit power of the wireless network node, the UE can be limited in allocating transmit power to SRS resources. The relatively low power can result in a relatively low signal to interference and noise ratio (SINR), which can result in poor measurements of uplink CSI and / or downlink CSI. The present disclosure describes one or more embodiments to address at least one or more of the above issues.

[0048] In one embodiment, the present disclosure addresses at least one issue of existing methods in which a problem of allocating transmit power to SRS resources can arise in order to perform SRS transmissions between a user equipment (UE) and a wireless network node. Existing methods of allocating transmit power to SRS resources can result in unfairness in downlink (DL) channel state information (CSI).

[0049] In another embodiment, the present disclosure addresses at least one issue of existing methods in which a problem of asymmetric interference conditions between downlink (DL) and uplink (UL) can arise in order to perform SRS transmissions between a user equipment (UE) and a wireless network node. Existing methods of configuring parameters (e.g., SRS precoders and / or spatial domain transmission filters) can not be suitable for measuring downlink (DL) channel state information (CSI).

[0050] In another embodiment, the present disclosure addresses at least one issue of existing methods in which a problem of configuring SRS resources for frequency hopping can arise in order to perform SRS transmissions between a user equipment (UE) and a wireless network node. Existing methods of limiting SRS transmission distribution within allocated physical resource blocks (PRBs) can be inefficient for performing SRS transmissions and / or measuring downlink (DL) channel state information (CSI).

[0051] Figure 1A wireless communication system 100 is shown that includes a wireless network node 132 and one or more user equipment (UE) (152, 154, and 156). The wireless network node can be a base station, which can be a Node B (NB, e.g., eNB or gNB) in a mobile telecommunication context. Each UE can wirelessly communicate with the wireless network node via one or more radio channels 140. For example, a first UE 152 can wirelessly communicate with the wireless network node 132 via a channel that includes multiple radio channels for a particular time period. Likewise, a second UE 154 and a third UE 156 can wirelessly communicate with the wireless network node 132.

[0052] Figure 2 An example base station 200 is shown. The example base station can include radio transmit / receive (Tx / Rx) circuitry 208 to transmit / receive communications with UEs and / or other base stations. The base station can also include network interface circuitry 209 to enable the base station to communicate with other base stations and / or a core network (e.g., optical or wired interconnections, Ethernet and / or other data transmission media / protocols). The base station 200 can optionally include input / output (I / O) interface 206 to communicate with operators, etc.

[0053] The base station can also include system circuitry 204. The system circuitry 204 can include a processor 221 and / or a memory 222. The memory 222 can include an operating system 224, instructions 226, and parameters 228. The instructions 226 can be configured to cause one or more of the processors 124 to perform the functions of the base station. The parameters 228 can include parameters to support the execution of the instructions 226. For example, the parameters can include network protocol settings, bandwidth parameters, radio frequency mapping assignments, and / or other parameters.

[0054] Figure 3An example UE 300 is shown. The UE 300 can be a mobile device, such as a smartphone or a mobile communication module disposed in a vehicle. The UE 300 can include a communication interface 302, system circuitry 304, input / output interface (I / O) 306, display circuitry 308, and storage 309. The display circuitry can include a user interface 310. The system circuitry 304 can include any combination of hardware, software, firmware, or other logic / circuitry. The system circuitry 304 can be implemented, for example, with one or more system on a chip (SoC), application-specific integrated circuits (ASICs), discrete analog and digital circuits, and other circuitry. The system circuitry 304 can be part of the implementation of any desired functionality in the UE 300. In this regard, the system circuitry 304 can include logic circuitry that facilitates, for example, decoding and playing music and videos, 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 telephone calls or data connections, such as for internet connectivity; 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 input / output (I / O) interface 306 can include a graphical user interface, a touch-sensitive display, tactile feedback or other haptic output, voice or facial recognition input, buttons, switches, a speaker, and other user interface elements. Other examples of I / O interface 306 can include a microphone, video and still image camera, temperature sensor, vibration sensor, rotation and direction sensor, earphone and microphone input / output jacks, universal serial bus (USB) connector, memory card slot, radiation sensor (e.g., IR sensor), and other types of input.

[0055] Reference is made to Figure 3The communication interface 302 can include radio frequency (RF) transmit (Tx) and receive (Rx) circuitry 316 that handles transmission and reception of signals via one or more antennas 314. The communication interface 302 can include one or more transceivers. The transceiver can be a wireless transceiver that includes modulation / demodulation circuitry, digital to analog converters (DACs), shaping tables, analog to digital converters (ADCs), filters, waveform shapers, preamplifiers, power amplifiers, and / or other logic circuitry for transmission and reception through one or more antennas or, for some devices, through physical (e.g., wired) media. The signals transmitted and received can conform to any of a wide variety of formats, protocols, modulation schemes (e.g., QPSK, 16-QAM, 64-QAM, or 256-QAM), channels, bit rates, and encodings. As one specific example, the communication interface 302 can include a transceiver that supports transmission and reception under the 2G, 3G, BT, WiFi, Universal Mobile Telecommunications System (UMTS), High Speed Packet Access (HSPA)+, 4G / Long Term Evolution (LTE), and 5G standards. However, the technology described below is applicable to other wireless communication technologies, whether derived from the Third Generation Partnership Project (3GPP), GSM Association, 3GPP2, IEEE, or other partners or standards bodies.

[0056] Reference is made to Figure 3 The system circuitry 304 can include one or more processors 321 and memory 322. The memory 322 stores, for example, an operating system 324, instructions 326, and parameters 328. The processor 321 is configured to execute the instructions 326 to perform the functions required of the UE 300. The parameters 328 can provide and specify configuration and operational options for the instructions 326. The memory 322 can also store any BT, WiFi, 3G, 4G, 5G, or other data that the UE 300 will transmit or has received through the communication interface 302. In various implementations, the system power of the UE 300 can be provided by a power storage device such as a battery or a transformer.

[0057] The present disclosure describes several embodiments that can be implemented, in part or in whole, on the network base stations and / or user equipment described above.

[0058] Example #1

[0059] The present disclosure describes embodiments of methods and apparatus for performing sounding reference signal (SRS) transmissions between user equipment and network base stations.

[0060] In one embodiment, reference is made to Figure 4In another embodiment, referring to FIG. 5, a method 500 for transmitting SRS by a user equipment (UE) can include a step 510 of obtaining, by the UE, a first transmit power of a first SRS resource and a second transmit power of a second SRS resource, wherein the first SRS resource and the second SRS resource belong to a same SRS resource set; and a step 520 of determining, by the UE, the second transmit power of the second SRS resource according to the first transmit power of the first SRS resource.

[0061] In another embodiment, referring to FIG. 5, a method 500 for transmitting SRS by a user equipment (UE) can include a step 510 of obtaining, by the UE, a first transmit power of a first SRS resource and a second transmit power of a second SRS resource, wherein the first SRS resource and the second SRS resource belong to a same SRS resource set; and a step 520 of determining, by the UE, the second transmit power of the second SRS resource according to the first transmit power of the first SRS resource. Figure 5

[0062] The SRS resource set can include more than one SRS resource. Each of the more than one SRS resource can include a set of power control parameters. The set of power control parameters can include at least one of alpha, pathlossReferenceRS, p0, or srs-PowerControlAdjustmentStates. The SRS resource can be configured with a plurality of SRS ports, and the UE can allocate transmit power among the configured SRS ports

[0063] In one implementation, for example but not limited to, the UE can transmit uplink signals through two transmit (Tx) antennas and can receive downlink signals through four receive (Rx) antennas. To achieve full downlink channel information, the UE can configure the SRS antenna as 2T4R for antenna switching.

[0064] Referring to FIG. 6, as an example of 2T4R SRS antenna configuration, the SRS resource set 610 can include a first SRS resource 620 and a second SRS resource 640. The first SRS resource 620 can include two SRS ports. The second SRS resource 640 can include two SRS ports. Figure 6A The first SRS resource 620 can include a first SRS port Tx0 in 622 and a second SRS port Tx1 in 624. In 622, the first SRS port Tx0 can be associated with a first antenna port Rx0. In 624, the second SRS port Tx1 can be associated with a second antenna port Rx1.

[0065]

[0066] ​​The second SRS resource 640 can include a first SRS port TxO in 642 and a second SRS port Tx1 in 644. In 642, the first SRS port TxO can be associated with the third antenna port Rx2. In 644, the second SRS port Tx1 can be associated with the fourth antenna port Rx3.

[0067] In the existing method, the UE can allocate equal transmit power to each SRS resource The transmit power can also be evenly allocated among the configured SRS ports That is, in Figure 6A In 2T4R for antenna switching, each SRS port within the SRS resource set can be configured with the same transmit power.

[0068] In another embodiment, the UE can have higher capability and support more Rx antennas and / or more Tx antennas. For example, but not limited to, the UE can support six Tx antennas and eight Rx antennas. For example, to achieve full downlink channel information, the UE can configure the SRS antennas as 4T6R for antenna switching.

[0069] Referring to Figure 6B As an example of 4T6R SRS antenna configuration, the SRS resource set 650 can include a first SRS resource 660 and a second SRS resource 680. The first SRS resource 660 can include four SRS ports, and the second SRS resource 680 can include two SRS ports. In one embodiment, when the UE configures the SRS antennas as 4T6R, the first SRS resource and the second SRS resource can be configured to be transmitted in different symbols. The SRS ports of the second SRS resource 680 can be associated with different UE antenna ports compared to the SRS ports of the first SRS resource 660.

[0070] Referring to Figure 6BThe first SRS resource 660 can include a first SRS port TxO 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 TxO can be associated with the first antenna port RxO. In 664, the second SRS port Tx1 can be associated with the second antenna port Rx1. In 666, the third SRS port Tx2 can be associated with the third antenna port Rx2. In 668, the fourth SRS port Tx3 can be associated with the fourth antenna port Rx3. The second SRS resource 680 can include a first SRS port TxO in 682 and a second SRS port Tx1 in 684. In 682, the first SRS port TxO can be associated with the fifth antenna port Rx4. In 684, the second SRS port Tx1 can be associated with the sixth antenna port Rx5.

[0071] When the UE includes a 4T6R SRS antenna configuration, there can be different SRS antenna configurations. Referring to Figure 7 As another example of a 4T6R SRS antenna configuration, the SRS resource set 710 can 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 can include a first SRS port TxO in 722 and a second SRS port Tx1 in 724. The second SRS resource 740 can include a first SRS port TxO in 742, a second SRS port Tx1 in 744, a third SRS port Tx2 in 746, and a fourth SRS port Tx3 in 748.

[0072] For the two examples above, SRS resources in the same SRS resource set can include different numbers of SRS ports or different numbers of antenna ports. A problem can arise when the method of allocating transmit power to SRS resources results in unequal transmit power for each SRS port within different SRS resources in the same SRS resource set, and this problem can result in unfair measurements 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 SRS power control is based on the SRS resource set 710, the same linear SRS transmit power is used for all SRS resources (720 and 740) within the same SRS resource set 710, and the transmit power of the first SRS resource is the same as the transmit power of the second SRS resource. Because the first SRS resource 720 has two ports, each port in the first SRS resource 720 has linear power. Because the second SRS resource 740 has four ports, each port in the second SRS resource 740 has linear power. The different power of the ports in the first SRS resource and the second SRS resource can cause the measurement of the DL CSI of each Rx antenna to be unfair.

[0073] The present disclosure describes embodiments that solve the above-mentioned drawbacks. With reference to Figure 8 In step 830, the UE 810 can obtain a first transmit power of a first SRS resource in a set of SRS resources. The first transmit power can be a linear value of the determined transmit power P In one implementation, the determined transmit power can be P SRS,b,f,c (i, q s , l), where i is an SRS transmission occasion, q s refers to a set of SRS resources provided by SRS-ResourceSet and SRS-ResourceSetId, and l is an index.

[0074] In step 840, the UE can determine a second transmit power of a second SRS resource according to the first transmit power of the first SRS resource in the set of SRS resources.

[0075] With reference to Figure 9A As one implementation of step 840, in step 910A, the UE can determine the first transmit power of the first SRS resource to be In step 920A, the UE can determine the second transmit power of the second SRS resource to be times of N, where N is a positive integer. For example, but not limited to, N can include 1, 2, 3, 4, 8, and 10. The first SRS resource can include a first number of ports; the second SRS resource includes a second number of ports; the second number is N times of the first number.

[0076] With reference to Figure 9B As another implementation of step 840, in step 910B, the UE can determine the first transmit power of the first SRS resource to be In step 920B, the UE can determine the second transmit power of the second SRS resource to be times of N, where N is a positive integer. For example, but not limited to, N can include 1, 2, 3, 4, 8, and 10. The first SRS resource can include a first number of ports; the second SRS resource includes a second number of ports; the second number is N times of the first number.

[0077] With reference to Figure 9CAs another implementation, step 840 can further include step 930: evenly distributing a first transmit power of the first SRS resource among a first number of ports in the first SRS resource. Referring to Figure 9D As another implementation, step 840 can further include step 940: evenly distributing a second transmit power of the second SRS resource among a second number of ports in the second SRS resource.

[0078] Referring to Figure 8 In step 860, the UE 810 can transmit the first SRS resource to the network base station 820 with the first transmit power, and transmit the second SRS resource to the network base station 820 with the second transmit power. The network base station 820 can receive the first SRS resource transmitted by the UE with the first transmit power and receive the second SRS resource transmitted by the UE with the second transmit power.

[0079] In the embodiments described in the present disclosure, the linear value of the transmit power of the second SRS resource can be determined as N times or 1 / N times of the transmit power of the first SRS resource within the same SRS resource set. The determination can depend on whether the number of SRS ports in the second SRS resource is N times or 1 / N times of the number of SRS ports in the first SRS resource.

[0080] Taking a 4T6R configuration as an example, as shown in Figure 6B , N can be equal to 2, when the linear value of the transmit power of the first SRS resource 660 is , the linear value of the transmit power of the second SRS resource 680 can be , depending on whether the number of ports in the second SRS resource 680 is 1 / 2 of the number of ports in the first SRS resource 660.

[0081] Again taking a 4T6R configuration as an example, as shown in Figure 7 , N can be equal to 2, when the linear value of the transmit power of the first SRS resource 720 is , the linear value of the transmit power of the second SRS resource 740 can be , depending on whether the number of ports in the second SRS resource 740 is twice the number of ports in the first SRS resource 720.

[0082] Example #2

[0083] The present disclosure describes embodiments of methods and apparatuses for performing sounding reference signal (SRS) transmission between a user equipment and a network base station.

[0084] For downlink and uplink between a user equipment and a network base station, channel reciprocity can help measure downlink CSI from uplink SRS transmission. In existing methods, due to asymmetric interference conditions between downlink and uplink, SRS precoder and / or spatial domain transmission filter can not be suitable for downlink CSI measurement. For example, an uplink bandwidth part (BWP) for SRS transmission from a UE to a network base station can overlap with and can be narrower (or smaller) than a downlink BWP. For another example, there can be no overlap between an uplink BWP for SRS transmission and a downlink BWP. In this case, computation of SRS precoder can take into account downlink interference, which can improve downlink CSI measurement from uplink SRS transmission.

[0085] In one embodiment, referring to Figure 10A Method 1000 can include step 1010 of receiving, by a user equipment from a network base station, N sets of parameters corresponding to a set of SRS resources.

[0086] In one embodiment, referring to Figure 11A Method 1100 can include step 1010 of transmitting, by a network base station to a user equipment, N sets of parameters corresponding to a set of SRS resources.

[0087] In one implementation, N can equal 1, and there can be only one set of parameters. The set of parameters can be a same set of parameters for one or more SRS resources in the set of SRS resources. For example, when the set of SRS resources includes a first SRS resource and a second SRS resource, the first SRS resource and the second SRS resource can share a same set of parameters.

[0088] In another implementation, the set of SRS resources can include a quantity of N SRS resources, and the quantity N > 1. Each set of parameters in the N sets of parameters can correspond to each SRS resource in the set of SRS resources. For example, when N = 2, the set of SRS resources can include a first SRS resource and a second SRS resource. The N sets of parameters corresponding to the set of SRS resources can include a first set of parameters corresponding to the first SRS resource and a second set of parameters corresponding to the second SRS resource.

[0089] Referring to Figure 10B Method 1000 can further include step 1020 of receiving, by the user equipment, each set of parameters in a beam reference form configured by the network base station, wherein the beam reference includes a transmission configuration indication (TCI) or a spatial relation configuration.

[0090] Referring to Figure 11B Method 1100 can further include step 1120 of configuring, by the network base station, each set of parameters in a beam reference form, wherein the beam reference includes at least one of a transmission configuration indication (TCI) or a spatial relation configuration.

[0091] Referring to Figure 11C Method 1100 can further include step 1130: transmitting, by the network base station, a transmission configuration indication (TCI) or a spatial relation configuration to the user equipment.

[0092] In another embodiment, in a higher frequency band, each SRS resource can be configured in a beam reference form. For example, the higher frequency band can include a frequency range 2 (FR2) between 24.25 GHz and 52.6 GHz. The beam reference can be used to inform quasi-co-location (QCL) information or spatial relation parameters, which can include a spatial relation (e.g., named SRS-SpatialRelationlnfo) or a TCI. The UE can transmit the SRS resource with the same spatial domain transmit filter used for transmission or reception of a reference signal (RS) configured in a beam reference form. For example, the RS can include a downlink RS and / or an uplink SRS. The beam reference can be used to determine the analog beamforming of the SRS.

[0093] Referring to Figure 12 In step 1230, the network base station 1220 can configure each set of parameters in a beam reference form. In step 1240, the network base station 1220 can transmit N sets of parameters corresponding to the SRS resource set to the UE 1210.

[0094] In one embodiment, in addition to quasi-co-location (QCL) information or spatial filter information, the set of parameters can be configured according to intention. In another embodiment, the set of parameters can be configured for interference estimation when calculating the SRS precoder.

[0095] The set of parameters can include an additional BWP identification (ID). In one embodiment, there can be an existing BWP ID configured under the beam reference, and the additional BWP ID can be independent of the existing BWP ID configured under the beam reference. The BWP ID can be used to determine a downlink (DL) BWP position for interference detection. When the UE calculates the SRS precoder, the UE can avoid using a precoder associated with severe interference of the DL BWP.

[0096] Additionally or alternatively, the set of parameters can include a channel state information interference measurement (CSI-IM) resource ID (CSI-IM-ResourceID) or a CSI-IM resource set ID (CSI-IM-ResourceSetID).

[0097] Additionally or alternatively, the set of parameters can include additional non-zero power (NZP) CSI reference signal (CSI-RS) resource IDs or NZP CSI-RS resource set IDs. The network base station can configure specific interference resources or resource set IDs to reduce the complexity of the UE. The specific interference resources or resource set IDs can include CSI-IM or NZP CSI-RS resource IDs or NZP CSI-RS resource set IDs. When the UE computes the SRS precoder, the UE can avoid using the precoder associated with severe interference of the configured interference resources or resource set. In one embodiment, there can be existing CSI-RS IDs configured under the beam reference, and the additional NZP CSI-RS resource IDs can be independent of the existing CSI-RS IDs configured under the beam reference.

[0098] Additionally or alternatively, the set of parameters can include a CSI-RS resource configuration ID (CSI-ResourceConfigId). The RS configured by the CSI-RS resource configuration ID can indicate specific downlink interference resources or resource sets.

[0099] Additionally or alternatively, the set of parameters can include a CSI report setting ID (CSI-ReportConfigId). The csi-IM-ResourcesForInterference or nzp-CSI-RS-ResourcesForInterference configured by the CSI report setting ID can be used to indicate specific DL interference resources or resource sets. When the UE computes the SRS precoder, the UE can avoid using the precoder associated with severe interference of the interference resources or resource sets.

[0100] Example #3

[0101] Frequency hopping is a special transmission technique of transmitting data (downlink and / or uplink) by changing the carrier frequency in a specific pattern. To transmit SRS more efficiently between the user equipment and the network base station, the present disclosure describes embodiments of configuring SRS frequency hopping for SRS resources or SRS resource sets.

[0102] In the existing method, SRS is transmitted on one or more contiguous physical resource blocks (PRBs) at a given time slot. The SRS is uniformly distributed within the one or more contiguous PRBs. Zadoff-Chu sequences (ZC) or computer generated sequences (CGS) are used for low peak-to-average power ratio (PAPR). This limitation in the existing method can result in a long frequency hopping period even when the user equipment does not have PAPR issues.

[0103] The present disclosure describes embodiments of methods and apparatus for performing sounding reference signal (SRS) transmission between a user equipment and a network base station to address at least some of the shortcomings of existing methods.

[0104] In one embodiment, more than one segment of frequency sounding can be supported in a given time slot to obtain fast wideband frequency sounding. The number of segments can be M, where M >= 2. Each segment of frequency sounding can include K consecutive PRBs, where K >= 1.

[0105] Reference is made to Figure 13 For example, a first segment 1310 (Segment 0) and a second segment 1320 (Segment 1) of frequency sounding can be supported in a given time. In a first time slot 1330 (Slot 0), the first segment 1310 can include a first hop block 1351. The first hop block 1351 can include four consecutive PRBs (1351-1, 1351-2, 1351-3, and 1351-4). In the first time slot 1330 (Slot 0), the second segment 1310 can include a second hop block 1352, which can include four consecutive PRBs.

[0106] In a second time slot 1340 (Slot 1), the first segment 1310 can include a third hop block 1353, which can include four consecutive PRBs. The first segment 1310 of frequency sounding can hop from the first hop block 1351 to the third hop block 1353, as compared between the PRBs in the first segment 1310 in the first time slot 1330 and the PRBs in the first segment 1310 in the second time slot 1340.

[0107] In the second time slot 1340 (Slot 1), the second segment 1320 can include a fourth hop block 1354, which can include four consecutive PRBs. The second segment 1320 of frequency sounding can hop from the second hop block 1352 to the fourth hop block 1354, as compared between the PRBs in the second segment 1320 in the first time slot 1330 and the PRBs in the second segment 1320 in the second time slot 1340.

[0108] Reference is made to Figure 13 Given that existing methods can require four time slots to sound an entire wideband frequency, the entire wideband frequency can be sounded in two time slots, resulting in a significant efficiency improvement. When M is limited, e.g., M is less than a pre-set threshold, a complete ZC or CGS sequence can be maintained in each segment of frequency sounding, such that PAPR degradation can be minimized or marginalized.

[0109] In one embodiment, reference is made to Figure 14AAt step 1410, the method 1400 can include transmitting, by the user equipment, sounding reference signals of M frequency domain intervals to the network base station on a symbol, where each of the M intervals includes contiguous physical resource blocks (PRBs), and M is a positive integer.

[0110] In one embodiment, referring to Figure 15 At step 1510, the method 1500 can include receiving, by the network base station, sounding reference signals of M frequency domain intervals from the user equipment on a symbol, where each of the M intervals includes contiguous physical resource blocks (PRBs), and M is a positive integer.

[0111] In one embodiment, referring to Figure 14B The method 1400 can optionally include configuring, to the user equipment, M sets of parameters corresponding to a SRS resource set or a SRS resource, where M > 1. Each of the M sets of parameters can correspond to each of the M intervals of frequency sounding. Different intervals of frequency sounding can include separate frequency hopping according to their corresponding associated parameters.

[0112] For example, the UE can be configured with M sets of parameters corresponding to one SRS resource; and can be configured with another M sets of parameters corresponding to another SRS resource. For another example, the UE can be configured with M sets of parameters corresponding to one SRS resource set; when the SRS resource set includes multiple SRS resources, the multiple SRS resources share the same set of parameters.

[0113] Referring to Figure 16 At step 1630, the UE 1610 can be configured with M sets of parameters corresponding to a SRS resource set or a SRS resource, where M > 1; and at step 1640, the UE 1610 can transmit sounding reference signals of M frequency domain intervals to the network base station 1620 on a symbol.

[0114] Each or one of the M sets of parameters can include all or a portion of the following frequency hopping parameters.

[0115] The parameter can include a frequency domain position (FreqDomainPosition). The frequency domain position can be one of the higher level parameters, specifies the starting position of SRS transmission in frequency domain and can be named as nRRC. For example, but not limited to, the frequency domain position can include a range of values between 0 and 67, including 0 and 67.

[0116] Optionally and / or alternatively, the parameter can include a frequency domain shift (FreqDomainShift). The frequency domain shift can be one of the higher level parameters. The FreqDomainShift can include an integer between 0 and 268, including 0 and 268.

[0117] Optionally and / or alternatively, the parameters can include frequency hopping (FreqHopping). FreqHopping can be one of the higher level parameters. FreqHopping can include all or a portion of: a c-SRS field, a b-SRS field, or a b-hop field.

[0118] Optionally and / or alternatively, the parameters can include a sequence identification (SequenceID) of the SRS. SequenceID can be one of the higher level parameters.

[0119] Optionally and / or alternatively, the parameters can include a transmission comb (TransmissionComb). TransmissionComb can be one of the higher level parameters and can include at least one of: a comb size, a comb offset, or a cyclic shift.

[0120] In another embodiment, there can be other parameters configured for an SRS resource or a set of SRS resources. These parameters can be shared for each of the M zones of frequency sounding.

[0121] Reference Figure 17 In one embodiment, a UE can be configured with two sets of SRS parameters corresponding to a first zone 1710 (Zone 0) and a second zone 1720 (Zone 1) of frequency sounding. Each of the two sets of parameters can include a frequency domain position (FreqDomainPosition). For example, the frequency domain position of the first set of parameters includes FreqDomainPosition_0 of the first zone 1710 as nRRC(0) 1712; the frequency domain position of the second set of parameters includes FreqDomainPosition_1 of the second zone 1720 as nRRC(1) 1722.

[0122] Reference Figure 17 In the first slot 1730 (Slot 0), the first zone 1710 can include a first hop block 1751. The first hop block 1751 can include four consecutive PRBs (1751-1, 1751-2, 1751-3, and 1751-4). In the first slot 1730 (Slot 0), the second zone 1710 can include a second hop block 1752, which can include four consecutive PRBs.

[0123] In the second slot 1740 (Slot 1), the first zone 1710 can include a third hop block 1753, which can include four consecutive PRBs. The first zone 1710 of frequency sounding can hop from the first hop block 1751 to the third hop block 1753, as compared between the PRBs in the first zone 1710 in the first slot 1730 and the PRBs in the first zone 1710 in the second slot 1740.

[0124] In the second slot 1740 (slot 1), the second interval 1720 can include a fourth hop block 1754, which can include four consecutive PRBs. The second interval 1720 of frequency sounding can hop from the second hop block 1752 to the fourth hop block 1754, as compared between the PRBs in the second interval 1720 of the first slot 1730 and the PRBs in the second interval 1720 of the second slot 1740.

[0125] In one embodiment, separate hopping can be supported between different intervals of frequency sounding. Referring to Figure 17 , the frequency domain location nRRC(0) 1712 of the first interval 1710 can be different from the frequency domain location nRRC(1) 1722 of the second interval 1720. The starting hopping location sub-band of the first interval 1710 can be different from the starting hopping location sub-band of the second interval 1720. In another embodiment, there can be no overlap between different intervals of frequency sounding. In another embodiment, the hopping CSRS 1714 of the first interval 1710 can be the same as the hopping CSRS 1724 of the second interval 1720. In another embodiment, other parameters in the two sets of parameters, including transmission comb, cyclic shift, number of symbols, and / or repetition factor, can be the same for the two intervals of frequency sounding.

[0126] In another embodiment, referring to Figure 18 , the method 1400 can optionally include a step 1810 of calculating, by the user equipment, a set of hop numbers corresponding to sounding reference signals of M frequency domain intervals. The set of hop numbers can include M hop numbers.

[0127] In one embodiment, a single parameter (M) can be introduced for each SRS resource in the set of SRS resources. According to the single parameter (M), the UE can calculate M hop numbers corresponding to sounding reference signals of M frequency domain intervals. In another embodiment, a single parameter (M) can be introduced for the set of SRS resources, and the single parameter (M) can be shared among one or more SRS resources in the set of SRS resources.

[0128] Referring to Figure 19 , in step 1930, the UE 1910 can calculate M hop numbers corresponding to sounding reference signals of M frequency domain intervals; in step 1940, the UE 1910 can transmit the sounding reference signals of the M frequency domain intervals to the network base station 1920 over symbols.

[0129] In one embodiment of M = 1, there can be only one frequency interval. The hop number n SRSThe number of SRS transmissions can be counted. There can be a jump count on a given symbol. For SRS resources configured as aperiodic by higher-level parameters (e.g., resourceType), n... SRS It can be by Confirmed. For SRS resources configured as periodic or semi-persistent by the higher-level parameter resourceType, the SRS counter (n) is set. SRS It can be determined by the following formula:

[0130]

[0131] SRS counter (n SRS It can also be a jump number when there is only one frequency range. If it remains unchanged, it can be followed Increase by 1 and increase by 1.

[0132] In another implementation where M>1, there can be more than one frequency range, and the corresponding number of jumps can vary. Increasing by 1 increases M. The set of new (or updated) jump variables can be determined by n'. SRS =M·n SRS +{0,1...,M-1} is confirmed.

[0133] Given a sign, the set of new jump variables (n') SRS ) can include M·n SRS M·n SRS +1, ..., M·n SRS +M-1. The new group can have M jump numbers corresponding to M frequency intervals. For example, when M=3, the new jump number (n') of this group... SRS ) includes three jump variables 3n SRS 3n SRS +1 and 3n SRS +2. Jump variable 3n SRS This can correspond to the first frequency range; the number of jumps is 3n. SRS +1 can correspond to the second frequency range; jump number 3n SRS +2 can correspond to the third frequency range. SRS It can be an SRS counter, determined by the above formula.

[0134] The present disclosure describes methods, apparatuses, and computer readable media for wireless communications. The present disclosure addresses issues with SRS transmission signaling between a user equipment and a base station. The methods, apparatuses, and computer readable media described in the present disclosure can facilitate performance of SRS transmissions and enhance SRS signaling between a user equipment and a base station, thereby improving efficiency and overall performance. The methods, apparatuses, and computer readable media described in the present disclosure can improve the overall efficiency of a wireless communication system.

[0135] Reference throughout the specification to a feature, advantage, or similar language does not imply that all of the features and advantages that can be realized from the present solution should be or are in or included in any single implementation of the present solution. Rather, language relating to features and advantages is understood to mean that a particular feature, advantage, or property as described in connection with an embodiment is included in at least one embodiment of the present solution. Thus, discussion of a feature and advantage throughout the specification in relation to one embodiment can but does not necessarily indicate that the feature and advantage is or is included in that one embodiment.

[0136] Furthermore, features, advantages, and properties of the present solution can be combined in any suitable manner in one or more embodiments. Upon further consideration of the description herein, one of ordinary skill in the relevant art will recognize additional features and advantages of the present solution. Such features and advantages can not be present in all embodiments of the present solution.

Claims

1. A method for wireless communication, comprising: The Sound Reference Signal (SRS) transmission between the user equipment and the network base station is performed in the following manner: The user equipment calculates and detects a set of M frequency domain intervals corresponding to M jump numbers, where each of the M jump numbers corresponds to one of the M frequency domain intervals; The user equipment transmits the M frequency domain intervals of the detection reference signal to the network base station on the symbol, wherein each of the M frequency domain intervals includes a continuous physical resource block (PRB), and M is a positive integer; in: M sets of parameters are configured for the user equipment, each of the M sets of parameters including frequency hopping FreqHopping, wherein FreqHopping includes at least one of the following: c-SRS field, b-SRS field, or b-hop field.

2. The method according to claim 1, further comprising: The M sets of parameters configured for the user equipment correspond to an SRS resource set or an SRS resource, where M>1.

3. The method according to claim 2, wherein: Each of the M groups of parameters includes the frequency domain position FreqDomainPosition.

4. The method according to claim 3, wherein: Each of the M groups of parameters includes a frequency domain shift (FreqDomainShift).

5. The method according to any one of claims 2 to 4, wherein: Each of the M sets of parameters includes the SequenceID of the SRS.

6. The method according to any one of claims 2 to 4, wherein: Each of the M groups of parameters includes a transmission comb.

7. The method according to claim 6, wherein: The TransmissionComb includes at least one of the following: comb size, comb offset, or cyclic displacement.

8. The method according to claim 1, wherein: The M jump numbers include , ,..., ,in This is an SRS counter.

9. A method for wireless communication, comprising: The Sound Reference Signal (SRS) transmission between the user equipment and the network base station is performed in the following manner: The network base station receives M frequency domain intervals of detection reference signals from the user equipment in terms of symbols, wherein: A set of M jump numbers corresponding to the M frequency domain intervals of the frequency detection is calculated, wherein each of the M jump numbers corresponds to one interval among the M frequency domain intervals, and Each of the M frequency domain intervals comprises a continuous Physical Resource Block (PRB), where M is a positive integer; in: M sets of parameters are configured for the user equipment, each set of parameters in the M sets including frequency hopping FreqHopping, wherein FreqHopping includes at least one of the following: c- SRS field, b-SRS field, or b-hop field.

10. The method according to claim 9, wherein: The M sets of parameters configured for the user equipment correspond to an SRS resource set or an SRS resource, where M>1.

11. The method of claim 10, wherein: Each of the M groups of parameters includes the frequency domain position FreqDomainPosition.

12. The method according to claim 11, wherein: Each of the M groups of parameters includes a frequency domain shift (FreqDomainShift).

13. The method according to any one of claims 10 to 12, wherein: Each of the M sets of parameters includes the SequenceID of the SRS.

14. The method according to any one of claims 10 to 12, wherein: Each of the M groups of parameters includes a transmission comb.

15. The method of claim 14, wherein: The TransmissionComb includes at least one of the following: comb size, comb offset, or cyclic displacement.

16. The method according to claim 9, wherein: The M jump numbers include , ,..., ,in This is an SRS counter.

17. A wireless communication device, comprising a processor and a memory, wherein, The processor is configured to read code from the memory and implement the method according to any one of claims 1 to 16.

18. A computer program product comprising computer-readable program medium code stored thereon, wherein, When the code is executed by a processor, it causes the processor to perform the method according to any one of claims 1 to 16.

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