Method executed by user equipment and user equipment

Abstract

The present disclosure provides a method and a user equipment executed by a user equipment. According to the method and the user equipment executed by the user equipment of various aspects of the present disclosure, after receiving the downlink signal sent by the coarse beam, a finer beam can be obtained by measuring the configured optimized beam reference signal, and the fine beam can be measured and reported in one of the stages of initial access, such as system message reading, message 2, message 4, and even message 3 retransmission scheduling. In addition, multiple repeated transmissions of the downlink signal can also be received to achieve the purpose of coverage enhancement.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communications, and more particularly, to a method performed by a user equipment and the user equipment. Background Art

[0002] In order to meet the increased demand for wireless data communication services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or quasi-5G communication systems. Therefore, 5G or quasi-5G communication systems are also referred to as "super 4G networks" or "post-LTE systems."

[0003] 5G communication systems are implemented in higher frequency (millimeter wave, mmWave) bands, such as the 60 GHz band, to achieve higher data rates. In order to reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technology are discussed in 5G communication systems.

[0004] In addition, in the 5G communication system, development of system network improvements is underway based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, collaborative communications, coordinated multi-point (CoMP), receiving-end interference cancellation, etc.

[0005] In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) have been developed as advanced coded modulation (ACM), and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code multiple access (SCMA) as advanced access technologies. Summary of the invention

[0006] Various aspects of the present disclosure are to solve at least the above-mentioned problems and / or disadvantages, and provide at least the following advantages. Therefore, various aspects of the present disclosure provide methods and user equipment executed by user equipment. According to the methods and user equipment executed by user equipment of various aspects of the present disclosure, after receiving the downlink signal sent by the coarse beam, the user equipment (UE) can obtain a finer beam by measuring the configured optimized beam reference signal, and the fine beam can be measured and reported in one of the stages of initial access, such as system message reading, message 2, message 4, and even message 3 retransmission scheduling. In addition, multiple repeated transmissions of the downlink signal can be received to achieve the purpose of coverage enhancement.

[0007] According to one aspect of the present disclosure, a method performed by a user equipment includes: receiving and measuring a first downlink beam reference signal, and selecting one or more first downlink beam reference signals.

[0008] According to one aspect of the present disclosure, the method also includes: receiving configuration information about a second downlink beam reference signal sent by a base station; receiving and measuring multiple second downlink beam reference signals corresponding to the first downlink beam reference signal according to the configuration information about the second downlink beam reference signal; and selecting one or more second downlink beam reference signals.

[0009] According to one aspect of the present disclosure, selecting one or more first downlink beam reference signals includes: selecting one or more first downlink beam reference signals based on the number X of first downlink beam reference signals, a first threshold T_RSRP of the reference signal received power RSRP value, and the number R of first downlink beam reference signals whose RSRP values ​​are greater than the first threshold T_RSRP, wherein X and R are positive integers.

[0010] According to one aspect of the present disclosure, the configuration information about the second downlink beam reference signal includes at least one of the following: the number of second downlink beam reference signals configured or mapped in the first downlink beam reference signal; and the time-frequency resource position of the second downlink beam reference signal configured or mapped in the first downlink beam reference signal.

[0011] According to one aspect of the present disclosure, the configuration information about the second downlink beam reference signal includes at least one of the following: a time domain unit interval between the second downlink beam reference signal and a reference point in the time domain; a frequency domain unit interval between the second downlink beam reference signal and a reference point in the frequency domain; the number of time domain units occupied by the second downlink beam reference signal; and the number of frequency domain units occupied by the second downlink beam reference signal, wherein the reference point is at least one of an absolute time domain point or a frequency domain point, a time domain starting position of a downlink beam reference signal corresponding to the second downlink beam reference signal, and a frequency domain starting position of a downlink beam reference signal corresponding to the second downlink beam reference signal.

[0012] According to one aspect of the present disclosure, the second downlink beam reference signal includes at least one of the following: a synchronization signal block SSB for sending a fine beam; a demodulation reference signal DMRS for sending a physical broadcast channel PBCH in the synchronization signal block SSB; a DMRS in a CORESET for sending scheduling system information; a DMRS in a search space; a DMRS in downlink control information; a DMRS in a physical downlink control channel; and a DMRS on a physical downlink shared channel carrying system information.

[0013] According to one aspect of the present disclosure, the DMRS signal is a repeatedly transmitted DMRS of a corresponding signal, and the repeatedly transmitted corresponding signal includes at least one of the following: a repeatedly transmitted CORESET; a repeatedly transmitted PBCH, and / or a search space; a repeatedly transmitted DCI / PDCCH; a repeatedly transmitted PDSCH carrying system information; a repeatedly transmitted message 2 or message 4 in the access process; and a repeatedly transmitted RAR or DCI / PDCCH of a scheduling message 3.

[0014] According to one aspect of the present disclosure, the method also includes: receiving a configuration for repeated transmission sent by a base station; performing repeated transmission according to the configuration for repeated transmission; wherein the configuration for repeated transmission includes at least one of the following: the number of repeated transmissions; the starting position of the time-frequency resources for repeated transmission and / or the size of the time-frequency resources occupied; the time domain interval and / or frequency domain interval between repeatedly transmitted signals; and the period of repeatedly transmitting signals.

[0015] According to one aspect of the present disclosure, the method also includes performing at least one of the following for the repeatedly transmitted signal: selecting a repeatedly transmitted signal by detecting each of the multiple repeatedly transmitted signals; performing combined detection on the multiple repeatedly transmitted signals; and sending feedback via an uplink signal for the selected repeatedly transmitted signal, wherein the uplink signal is at least one of a grouping of random access resources, an uplink data channel, and a physical uplink control channel PUCCH signal after message 4.

[0016] According to one aspect of the present disclosure, sending feedback via an uplink signal includes: feeding back the selected beam based on mapping of the second downlink beam reference signal to random access resources.

[0017] According to one aspect of the present disclosure, when the uplink signal is a PUCCH signal after message 4: feedback is performed by jointly encoding or separately encoding the second downlink beam reference signal and the fed-back ACK signal.

[0018] According to one aspect of the present disclosure, the selected second downlink beam reference signal is quasi-co-located with a downlink signal of a random access process.

[0019] According to one aspect of the present disclosure, the selected second downlink beam reference signal is the second downlink beam reference signal that is most recently fed back through an uplink signal or is determined to be correct.

[0020] According to another aspect of the present disclosure, a user equipment UE includes: a transceiver for receiving a signal from a base station and sending a signal to the base station; a memory for storing executable instructions; and a processor for executing the stored instructions to execute the above method. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0022] Figure 1 An example wireless network 100 is shown in accordance with various embodiments of the present disclosure;

[0023] Figure 2a An example wireless transmission path according to an embodiment of the present disclosure is shown;

[0024] Figure 2b An example wireless receive path according to an embodiment of the present disclosure is shown;

[0025] Figure 3a An example UE 116 is shown according to an embodiment of the present disclosure;

[0026] Figure 3b An example gNB 102 according to an embodiment of the present disclosure is shown;

[0027] Figure 4 A contention-based random access procedure according to an embodiment of the present disclosure is shown;

[0028] Figure 5 A diagram showing an example of a UE selecting an SSB rule according to an embodiment of the present disclosure;

[0029] Figure 6 A diagram showing an example of a more optimal beam reference signal according to an embodiment of the present disclosure;

[0030] Figure 7 A diagram showing an example of a CSI-RS based better beam reference signal according to an embodiment of the present disclosure;

[0031] Figure 8 A diagram showing an example of a more optimal beam reference signal based on a repetitive signal DMRS according to an embodiment of the present disclosure; and

[0032] Fig. 9 is a block diagram illustrating a UE according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0033] The text and drawings are provided as examples only to help readers understand the present disclosure. They are not intended and should not be interpreted as limiting the scope of the present disclosure in any way. Although certain embodiments and examples have been provided, it is obvious to those skilled in the art based on what is disclosed herein that the embodiments and examples shown may be changed without departing from the scope of the present disclosure.

[0034] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present disclosure refers to the presence of the features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0035] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art in the field to which the present disclosure belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0036] It will be understood by those skilled in the art that the "terminal" and "terminal device" used herein include both devices with wireless signal receivers, which are devices with only wireless signal receivers without transmission capabilities, and devices with receiving and transmitting hardware, which are devices with receiving and transmitting hardware capable of performing two-way communication on a two-way communication link. Such devices may include: cellular or other communication devices, which have a single-line display or a multi-line display or a cellular or other communication device without a multi-line display; a personal communication system (Personal Communications Service, PCS), which may combine voice, data processing, fax and / or data communication capabilities; a PDA (Personal Digital Assistant), which may include a radio frequency receiver, a pager, Internet / intranet access, a web browser, a notepad, a calendar and / or a global positioning system (Global Positioning System, GPS) receiver; a conventional laptop and / or palmtop computer or other device, which has and / or includes a conventional laptop and / or palmtop computer or other device with and / or including a radio frequency receiver. The "terminal" or "terminal device" used herein may be portable, transportable, installed in a vehicle (air, sea and / or land), or adapted and / or configured to operate locally, and / or in a distributed form, at any other location on the earth and / or in space. The "terminal" or "terminal device" used herein may also be a communication terminal, an Internet terminal, a music / video playing terminal, such as a PDA, a mobile Internet device (MID) and / or a mobile phone with a music / video playing function, or a smart TV, a set-top box and other devices.

[0037] Those skilled in the art will appreciate that the “base station” (BS) or “network equipment” used herein may refer to eNB, eNodeB, NodeB or base transceiver station (BTS) or gNB, etc., depending on the technology and terminology used.

[0038] Those skilled in the art will appreciate that the "memory" used herein may be of any type suitable for the technical environment of this document and may be implemented using any suitable data storage technology, including but not limited to semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory, and removable memory.

[0039] Those skilled in the art will appreciate that the “processor” used herein may be of any type suitable for the technical environment of this article, including but not limited to one or more of the following: a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor DSP, and a processor based on a multi-core processor architecture.

[0040] The time domain unit (also called time unit) in the present disclosure can be: an OFDM symbol, an OFDM symbol group (consisting of multiple OFDM symbols), a time slot, a time slot group (consisting of multiple time slots), a subframe, a subframe group (consisting of multiple subframes), a system frame, a system frame group (consisting of multiple system frames); it can also be an absolute time unit, such as 1 millisecond, 1 second, etc.; the time unit can also be a combination of multiple granularities, such as N1 time slots plus N2 OFDM symbols.

[0041] The frequency domain unit in the present disclosure may be: a subcarrier, a subcarrier group (consisting of multiple subcarriers), a resource block (RB) (also referred to as a physical resource block (PRB)), a resource block group (consisting of multiple RBs), a bandwidth part (BWP), a band part group (consisting of multiple BWPs), a band / carrier, a band group / carrier group; it may also be an absolute frequency domain unit, such as 1 Hz, 1 kHz, etc.; the frequency domain unit may also be a combination of multiple granularities, such as M1 PRBs plus M2 subcarriers.

[0042] Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings.

[0043] Figure 1 An example wireless network 100 is shown in accordance with various embodiments of the present disclosure. Figure 1 The embodiment of the wireless network 100 shown in FIG. 1 is for illustration only. Other embodiments of the wireless network 100 can be used without departing from the scope of the present disclosure.

[0044] Wireless network 100 includes gNodeB (gNB) 101, gNB 102, and gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one Internet Protocol (IP) network 130, such as the Internet, a private IP network, or other data network.

[0045] Depending on the network type, other well-known terms such as "base station" or "access point" can be used instead of "gNodeB" or "gNB". For convenience, the terms "gNodeB" and "gNB" are used in this patent document to refer to network infrastructure components that provide wireless access to remote terminals. Also, depending on the network type, other well-known terms such as "mobile station", "subscriber station", "remote terminal", "wireless terminal" or "user device" can be used instead of "user equipment" or "UE". For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to a remote wireless device that wirelessly accesses a gNB, whether the UE is a mobile device (such as a mobile phone or smartphone) or a commonly thought of fixed device (such as a desktop computer or vending machine).

[0046] gNB 102 provides wireless broadband access to network 130 for a first plurality of user equipment (UE) within coverage area 120 of gNB 102. The first plurality of UEs include: UE 111, which may be located in a small business (SB); UE 112, which may be located in an enterprise (E); UE 113, which may be located in a WiFi hotspot (HS); UE 114, which may be located in a first residence (R); UE 115, which may be located in a second residence (R); UE 116, which may be a mobile device (M), such as a cellular phone, a wireless laptop, a wireless PDA, etc. gNB 103 provides wireless broadband access to network 130 for a second plurality of UEs within coverage area 125 of gNB 103. The second plurality of UEs include UE 115 and UE 116. In some embodiments, one or more of gNBs 101-103 may be capable of communicating with each other and with UEs 111-116 using 5G, long term evolution (LTE), LTE-A, WiMAX, or other advanced wireless communication technologies.

[0047] The dashed lines illustrate the approximate extents of coverage areas 120 and 125, which are shown as approximately circular for purposes of illustration and explanation only. It should be clearly understood that coverage areas associated with gNBs, such as coverage areas 120 and 125, can have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the radio environment associated with natural and man-made obstacles.

[0048] As described in more detail below, one or more of gNB 101, gNB 102, and gNB 103 include a 2D antenna array as described in embodiments of the present disclosure. In some embodiments, one or more of gNB 101, gNB 102, and gNB 103 support codebook design and structure for a system with a 2D antenna array.

[0049] although Figure 1 One example of a wireless network 100 is shown, but Figure 1 Various changes may be made. For example, wireless network 100 can include any number of gNBs and any number of UEs in any suitable arrangement. Also, gNB 101 can communicate directly with any number of UEs and provide those UEs with wireless broadband access to network 130. Similarly, each gNB 102-103 can communicate directly with network 130 and provide UEs with direct wireless broadband access to network 130. In addition, gNBs 101, 102, and / or 103 can provide access to other or additional external networks, such as an external telephone network or other type of data network.

[0050] Figure 2a shows an example wireless transmission path according to the present disclosure; and Figure 2b An example wireless receive path according to the present disclosure is shown. In the following description, the transmit path 200 can be described as being implemented in a gNB (such as gNB 102) and the receive path 250 can be described as being implemented in a UE (such as UE 116). However, it should be understood that the receive path 250 can be implemented in a gNB and the transmit path 200 can be implemented in a UE. In some embodiments, the receive path 250 is configured to support codebook design and structure for a system with a 2D antenna array as described in embodiments of the present disclosure.

[0051] The transmit path 200 includes a channel coding and modulation block 205, a serial to parallel (S to P) block 210, an N-point inverse fast Fourier transform (IFFT) block 215, a parallel to serial (P to S) block 220, an add cyclic prefix block 225, and an upconverter (UC) 230. The receive path 250 includes a downconverter (DC) 255, a remove cyclic prefix block 260, a serial to parallel (S to P) block 265, an N-point fast Fourier transform (FFT) block 270, a parallel to serial (P to S) block 275, and a channel decoding and demodulation block 280.

[0052] In the transmit path 200, the channel coding and modulation block 205 receives a set of information bits, applies coding (such as low-density parity check (LDPC) coding), and modulates the input bits (such as using quadrature phase shift keying (QPSK) or quadrature amplitude modulation (QAM)) to generate a sequence of frequency-domain modulation symbols. The serial-to-parallel (S-to-P) block 210 converts (such as demultiplexes) the serial modulation symbols into parallel data to generate N parallel symbol streams, where N is the number of IFFT / FFT points used in the gNB 102 and the UE 116. The N-point IFFT block 215 performs an IFFT operation on the N parallel symbol streams to generate a time-domain output signal. The parallel-to-serial block 220 converts (such as multiplexes) the parallel time-domain output symbols from the N-point IFFT block 215 to generate a serial time-domain signal. The add cyclic prefix block 225 inserts a cyclic prefix into the time-domain signal. The up-converter 230 modulates (such as up-converts) the output of the add cyclic prefix block 225 to an RF frequency for transmission via a wireless channel. The signal can also be filtered at baseband before conversion to RF frequency.

[0053] The RF signal transmitted from gNB 102 arrives at UE 116 after passing through a wireless channel, and an operation opposite to that at gNB 102 is performed at UE 116. Downconverter 255 downconverts the received signal to a baseband frequency, and remove cyclic prefix block 260 removes the cyclic prefix to generate a serial time-domain baseband signal. Serial-to-parallel block 265 converts the time-domain baseband signal into a parallel time-domain signal. N-point FFT block 270 performs an FFT algorithm to generate N parallel frequency-domain signals. Parallel-to-serial block 275 converts the parallel frequency-domain signals into a sequence of modulated data symbols. Channel decoding and demodulation block 280 demodulates and decodes the modulated symbols to recover the original input data stream.

[0054] Each of gNBs 101-103 may implement a transmit path 200 similar to that for transmitting in the downlink to UEs 111-116 and may implement a receive path 250 similar to that for receiving in the uplink from UEs 111-116. Similarly, each of UEs 111-116 may implement a transmit path 200 for transmitting in the uplink to gNBs 101-103 and may implement a receive path 250 for receiving in the downlink from gNBs 101-103.

[0055] Figure 2a and Figure 2b Each of the components in can be implemented using hardware only, or a combination of hardware and software / firmware. As a specific example, Figure 2a and Figure 2bAt least some of the components in can be implemented with software, while other components can be implemented by configurable hardware or a mixture of software and configurable hardware. For example, FFT block 270 and IFFT block 215 can be implemented as a configurable software algorithm, in which the value of the number of points N can be modified according to the implementation.

[0056] In addition, although described as using FFT and IFFT, this is illustrative only and should not be construed as limiting the scope of the present disclosure. Other types of transforms can be used, such as discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT) functions. It should be understood that for DFT and IDFT functions, the value of variable N can be any integer (such as 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of variable N can be any integer as a power of 2 (such as 1, 2, 4, 8, 16, etc.).

[0057] although Figure 2a and Figure 2b An example of a wireless transmit and receive path is shown, but the Figure 2a and Figure 2b Make various changes. For example, Figure 2a and Figure 2b The various components in can be combined, further subdivided or omitted, and additional components can be added according to specific needs. Figure 2a and Figure 2b It is intended to illustrate examples of the types of transmit and receive paths that can be used in a wireless network. Any other suitable architecture can be used to support wireless communications in a wireless network.

[0058] Figure 3a An example UE 116 according to the present disclosure is shown. Figure 3a The embodiment of UE 116 shown in FIG. 1 is for illustration only, and Figure 1 UEs 111-115 can have the same or similar configurations. However, UEs have a variety of configurations, and Figure 3a The scope of the present disclosure is not limited to any particular implementation of the UE.

[0059] UE 116 includes antenna 305, radio frequency (RF) transceiver 310, transmit (TX) processing circuit 315, microphone 320, and receive (RX) processing circuit 325. UE 116 also includes speaker 330, processor / controller 340, input / output (I / O) interface 345, input device(s) 350, display 355, and memory 360. Memory 360 includes operating system (OS) 361 and one or more applications 362.

[0060] The RF transceiver 310 receives incoming RF signals from the antenna 305 transmitted by the gNB of the wireless network 100. The RF transceiver 310 downconverts the incoming RF signals to generate an intermediate frequency (IF) or baseband signal. The IF or baseband signal is sent to the RX processing circuit 325, where the RX processing circuit 325 generates a processed baseband signal by filtering, decoding and / or digitizing the baseband or IF signal. The RX processing circuit 325 sends the processed baseband signal to the speaker 330 (such as for voice data) or to the processor / controller 340 (such as for web browsing data) for further processing.

[0061] The TX processing circuit 315 receives analog or digital voice data from the microphone 320, or receives other outgoing baseband data (such as network data, email, or interactive video game data) from the processor / controller 340. The TX processing circuit 315 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceiver 310 receives the outgoing processed baseband or IF signal from the TX processing circuit 315 and up-converts the baseband or IF signal to an RF signal that is transmitted via the antenna 305.

[0062] The processor / controller 340 can include one or more processors or other processing devices and execute an OS 361 stored in the memory 360 to control the overall operation of the UE 116. For example, the processor / controller 340 can control the reception of forward channel signals and the transmission of reverse channel signals through the RF transceiver 310, the RX processing circuit 325, and the TX processing circuit 315 according to well-known principles. In some embodiments, the processor / controller 340 includes at least one microprocessor or microcontroller.

[0063] The processor / controller 340 is also capable of executing other processes and programs resident in the memory 360, such as operations for channel quality measurement and reporting for a system with a 2D antenna array as described in the embodiments of the present disclosure. The processor / controller 340 is capable of moving data into or out of the memory 360 as needed for the executed process. In some embodiments, the processor / controller 340 is configured to execute applications 362 based on the OS 361 or in response to signals received from the gNB or operator. The processor / controller 340 is also coupled to the I / O interface 345, where the I / O interface 345 provides the UE 116 with the ability to connect to other devices such as laptops and handheld computers. The I / O interface 345 is the communication path between these accessories and the processor / controller 340.

[0064] Processor / controller 340 is also coupled to input device(s) 350 and display 355. An operator of UE 116 can input data into UE 116 using input device(s) 350. Display 355 can be a liquid crystal display or other display capable of presenting text and / or at least limited graphics (such as from a website). Memory 360 is coupled to processor / controller 340. A portion of memory 360 can include random access memory (RAM), while another portion of memory 360 can include flash memory or other read-only memory (ROM).

[0065] although Figure 3a An example of UE 116 is shown, but it is possible to Figure 3a Make various changes. For example, Figure 3a The various components in can be combined, further subdivided, or omitted, and additional components can be added according to specific needs. As a specific example, processor / controller 340 can be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Moreover, although Figure 3a The UE 116 is shown configured as a mobile phone or smart phone, but the UE can be configured to operate as other types of mobile or stationary devices.

[0066] Figure 3b An example gNB 102 according to the present disclosure is shown. Figure 3b The embodiment of the gNB 102 shown in FIG. is for illustration only, and Figure 1 Other gNBs can have the same or similar configurations. However, gNBs have a variety of configurations, and Figure 3b The scope of the present disclosure is not limited to any particular implementation of the gNB. It should be noted that gNB 101 and gNB 103 can include the same or similar structure as gNB 102.

[0067] like Figure 3b As shown in FIG. 1 , gNB 102 includes multiple antennas 370a-370n, multiple RF transceivers 372a-372n, transmit (TX) processing circuitry 374, and receive (RX) processing circuitry 376. In some embodiments, one or more of the multiple antennas 370a-370n include a 2D antenna array. gNB 102 also includes a controller / processor 378, a memory 380, and a backhaul or network interface 382.

[0068] The RF transceivers 372a-372n receive incoming RF signals from the antennas 370a-370n, such as signals transmitted by a UE or other gNB. The RF transceivers 372a-372n downconvert the incoming RF signals to generate IF or baseband signals. The IF or baseband signals are sent to the RX processing circuitry 376, which generates processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. The RX processing circuitry 376 sends the processed baseband signals to the controller / processor 378 for further processing.

[0069] The TX processing circuit 374 receives analog or digital data (such as voice data, network data, email, or interactive video game data) from the controller / processor 378. The TX processing circuit 374 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate a processed baseband or IF signal. The RF transceivers 372a-372n receive the outgoing processed baseband or IF signals from the TX processing circuit 374 and up-convert the baseband or IF signals to RF signals that are transmitted via the antennas 370a-370n.

[0070] The controller / processor 378 can include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, the controller / processor 378 can control the reception of forward channel signals and the transmission of reverse channel signals through the RF transceivers 372a-372n, the RX processing circuitry 376, and the TX processing circuitry 374 in accordance with well-known principles. The controller / processor 378 can also support additional functionality, such as more advanced wireless communication functionality. For example, the controller / processor 378 can perform a Blind Interference Sensing (BIS) process, such as performed through a Blind Interference Sensing (BIS) algorithm, and decode a received signal with an interference signal subtracted. The controller / processor 378 can support any of a variety of other functions in the gNB 102. In some embodiments, the controller / processor 378 includes at least one microprocessor or microcontroller.

[0071] The controller / processor 378 can also execute programs and other processes resident in the memory 380, such as a basic OS. The controller / processor 378 can also support channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the present disclosure. In some embodiments, the controller / processor 378 supports communications between entities such as web RTC. The controller / processor 378 can move data into or out of the memory 380 as needed by the executing process.

[0072] The controller / processor 378 is also coupled to a backhaul or network interface 382. The backhaul or network interface 382 allows the gNB 102 to communicate with other devices or systems via a backhaul connection or via a network. The backhaul or network interface 382 can support communication via any suitable (multiple) wired or wireless connections. For example, when the gNB 102 is implemented as part of a cellular communication system (such as a cellular communication system supporting 5G or new radio access technology or NR, LTE or LTE-A), the backhaul or network interface 382 can allow the gNB 102 to communicate with other gNBs via a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, the backhaul or network interface 382 can allow the gNB 102 to communicate with a larger network (such as the Internet) via a wired or wireless local area network or via a wired or wireless connection. The backhaul or network interface 382 includes any suitable structure that supports communication via a wired or wireless connection, such as an Ethernet or RF transceiver.

[0073] The memory 380 is coupled to the controller / processor 378. A portion of the memory 380 can include RAM, while another portion of the memory 380 can include flash memory or other ROM. In some embodiments, a plurality of instructions such as a BIS algorithm are stored in the memory. The plurality of instructions are configured to cause the controller / processor 378 to perform the BIS process and decode the received signal after subtracting at least one interference signal determined by the BIS algorithm.

[0074] As described in more detail below, the transmit and receive paths of the gNB 102 (implemented using the RF transceivers 372a-372n, the TX processing circuitry 374, and / or the RX processing circuitry 376) support aggregated communications with FDD cells and TDD cells.

[0075] although Figure 3b An example of a gNB 102 is shown, but the Figure 3b For example, gNB 102 can include any number of Figure 3a As a specific example, an access point can include a number of backhaul or network interfaces 382, ​​and the controller / processor 378 can support routing functions to route data between different network addresses. As another specific example, while shown as including a single instance of TX processing circuitry 374 and a single instance of RX processing circuitry 376, the gNB 102 can include multiple instances of each (such as one for each RF transceiver).

[0076] Figure 4 A contention-based random access procedure according to examples of the present disclosure is shown.

[0077] The transmission in the wireless communication system includes: the transmission from the base station (gNB) to the user equipment (UE, User Equipment) (called downlink transmission), the corresponding time slot is called the downlink time slot, and the transmission from the UE to the base station (called uplink transmission), the corresponding time slot is called the uplink time slot.

[0078] In the downlink communication of the wireless communication system, the system periodically sends the synchronization signal and the broadcast channel to the user through the synchronization signal block (SSB, synchronization signal / PBCH block). This period is the synchronization signal block period (SSB periodicity, SSB period), or called the synchronization signal block group period (SSB burst periodicity). At the same time, the base station will configure a random access configuration period (Physical random access channel configuration period, PRACH configuration period), configure a certain number of random access transmission opportunities (also called random access opportunities, PRACH transmission occasion, RO) during this period, and satisfy that all SSBs can be mapped to the corresponding RO within the mapping period (mapping period) (a certain length of time).

[0079] In the New Radio (NR) communication system, before the establishment of radio resource control, such as during the random access process, the performance of random access directly affects the user experience. In traditional wireless communication systems, such as LTE and LTE-Advanced, the random access process is applied to multiple scenarios such as establishing an initial link, cell switching, reestablishing an uplink link, and reestablishing an RRC connection, and is divided into contention-based random access and non-contention-based random access according to whether the user has exclusive preamble resources. Because in contention-based random access, each user selects a preamble sequence from the same preamble sequence resource in the process of trying to establish an uplink link, multiple users may select the same preamble sequence to send to the base station. Therefore, the conflict resolution mechanism is an important research direction in random access. How to reduce the probability of conflict and how to quickly resolve conflicts that have occurred are key indicators that affect random access performance.

[0080] The contention-based random access process in LTE-A is divided into four steps, such as Figure 4As shown. In the first step, the user randomly selects a preamble sequence from the preamble sequence resource pool and sends it to the base station. The base station performs correlation detection on the received signal to identify the preamble sequence sent by the user; in the second step, the base station sends a random access response (RAR) to the user, including a random access preamble sequence identifier, a timing advance instruction determined according to the delay estimation between the user and the base station, a temporary cell radio network temporary identifier (Cell-Radio Network Temporary Identifier, C-RNTI), and the time-frequency resources allocated for the user's next uplink transmission; in the third step, the user sends the third message (Msg3) to the base station based on the information in the RAR. Msg3 contains information such as the user terminal identifier and the RRC connection request, wherein the user terminal identifier is unique to the user and is used to resolve conflicts; in the fourth step, the base station sends a conflict resolution identifier to the user, including the user terminal identifier that wins the conflict resolution. After detecting its own identifier, the user upgrades the temporary C-RNTI to C-RNTI, sends an ACK signal to the base station, completes the random access process, and waits for the base station to schedule. Otherwise, the user will start a new random access process after a delay.

[0081] For the non-contention-based random access process, since the base station knows the user identity, it can allocate a preamble sequence to the user. Therefore, when the user sends the preamble sequence, it does not need to randomly select a sequence, but will use the allocated preamble sequence. After detecting the allocated preamble sequence, the base station will send a corresponding random access response, including information such as timing advance and uplink resource allocation. After receiving the random access response, the user believes that the uplink synchronization has been completed and waits for further scheduling by the base station. Therefore, the non-contention-based random access process only includes two steps: step one is to send the preamble sequence; step two is to send the random access response.

[0082] The random access procedure in LTE is applicable to the following scenarios:

[0083] 1. Initial access under RRC_IDLE;

[0084] 2. Re-establish the RRC connection;

[0085] 3. Cell switching;

[0086] 4. Downlink data arrives in RRC connected state and requests random access process (when uplink is asynchronous);

[0087] 5. Uplink data arrives in RRC connected state and requests random access procedure (when uplink is asynchronous or no resources are allocated to the scheduling request in PUCCH resources); and

[0088] 6. Positioning.

[0089] However, in a system that uses beamforming and / or a system with limited coverage, during the initial access phase, the user may ultimately fail to access due to mobility or other reasons. For example, the user device cannot correctly receive message 2 or message 4 from the base station device during the random access process. Therefore, how to provide sufficient beamforming gain and / or sufficient coverage size for the reception of downlink signals during the initial access process is a problem that needs to be solved.

[0090] Figure 5 A diagram showing an example of a UE selecting an SSB rule according to an embodiment of the present disclosure.

[0091] Specifically, in this embodiment, a novel method for confirming resource configuration for downlink signal transmission is described.

[0092] During the initial access process, the UE needs to measure a downlink beam reference signal and obtain a reference signal received power (RSRP) for measuring the downlink beam reference signal, where the downlink beam reference signal includes an SSB, etc.

[0093] Specifically, during the initial access process, the downlink signal sent by the base station may use a wide beam (such as an SSB beam), which has a larger coverage angle but a smaller beamforming gain; if the base station directly uses a thin beam to send, the coverage angle is smaller. In order to fully cover the cell, a larger number of SSBs need to be sent; and when the UE is moving, it is easy for the selected beam to have been sent but there is no opportunity or no timely notification to the base station, resulting in the failure of the initial access (and / or random access process); therefore, in order to better provide coverage and enable the UE to better resist mobility, a method for confirming resource configuration for downlink signal transmission according to an embodiment of the present disclosure is proposed.

[0094] Specifically, if the number of SSBs sent by the base station is N_SSB, that is, each SSB can represent a different direction, then by measuring the SSBs that can be received, when the UE measures and selects the SSB, at least one of the following methods can be used:

[0095] ● Based on a threshold value T_RSRP configured or preset by the base station, the UE selects the SSB whose RSRP value is higher (or not lower) than the strongest SSB or the strongest X SSBs in T_RSRP, where X is a positive integer value configured or preset by the base station. Figure 5As shown in case 1, SSB2, 3, 4 are higher than the threshold, and X is configured as 2, then the UE selects the strongest two SSBs from SSB2, 3, 4, namely SSB3, 4; preferably, when the number R of SSBs higher than (or not lower than) the threshold value is less than X, the UE can select the R SSBs (so that all selected SSBs are higher than or not lower than the threshold value) or select the strongest X SSBs (including the R SSBs and XR strongest SSBs not higher than or lower than the threshold) (so that the number of SSBs selected by the UE can reach X); preferably, the X may not be fixed, that is, the UE can select all SSBs higher than or not lower than the threshold value, such as Figure 5 In the example of case 2, there are 3 SSBs (SSB2, 3, 4) higher than the threshold value, and the UE selects all the 3 SSBs (SSB2, 3, 4);

[0096] ●The UE directly selects one or X SSBs with the strongest RSRP among the measured SSBs, where X is a positive integer value configured or preset by the base station; preferably, this method is used only when the RSRP values ​​of all measured SSBs are not higher (or lower) than T_RSRP; Figure 5 In the example of case 3, X is configured as 2, and the UE directly selects the two strongest SSBs among the measured SSBs, namely SSB3 and 4.

[0097] ●In particular, if for the above situation, the number of received or measured SSBs is less than X configured or preset by the base station, the UE selects all received or measured SSBs.

[0098] Based on the selected SSB, the UE can continue with subsequent operations such as system information acquisition and random access procedures.

[0099] By referring to the above Figure 5 The described method, after receiving the downlink signal sent by the coarse beam, obtains a finer beam by measuring the configured optimized beam reference signal and achieves the purpose of coverage enhancement by measuring and reporting the fine beam.

[0100] In the present disclosure, in order to obtain better beamforming gain during the initial access process, a finer beam reference signal is introduced. Figure 6 A diagram showing an example of a more optimal beam reference signal according to an embodiment of the present disclosure. Figure 7 A diagram showing an example of a CSI-RS based better beam reference signal according to an embodiment of the present disclosure. Figure 8 FIG. 1 shows an example of a more optimal beam reference signal based on a repeated signal DMRS according to an embodiment of the present disclosure. Figures 6 to 8 Give a description.

[0101] Based on the following considerations, a better beam reference signal is introduced:

[0102] A better beam reference signal is a beam reference signal sent using a finer beam based on an existing beam reference signal (such as an SSB signal) to obtain better beamforming gain.

[0103] ● Preferably, if the UE needs to measure more optimal beam reference signals, the longer the time it takes, which is not conducive to fast initial access; if the optimal beam reference signal measurement is not performed, a better beamforming gain cannot be obtained, which is not conducive to the success probability of initial access; therefore, the configuration of the optimal beam reference signal should be optimized to balance the access success rate and access delay;

[0104] ●Wherein, the configuration of the better beam reference signal includes at least one of the following:

[0105] ○ The number of better beam reference signals configured (mapped) for each beam reference signal, for example, the number of CSI-RS configured in one SSB is two; Figure 6 In the example, two CSI-RS are configured in SSB0, namely CSI-RS 0-0 and 0-1; two CSI-RS are configured in SSB1, namely CSI-RS 1-0 and 1-1; similarly, the CSI-RS configured in subsequent SSBs can be known, such as Figure 7 The place shown in;

[0106] ○ The time-frequency resource position of the configured (mapped) better beam reference signal (i.e., the starting position of the time-frequency resource and the size of the occupied time-frequency resource); specifically:

[0107] ■The time domain unit interval of each CSI-RS in the time domain with the reference point; and / or the frequency domain unit interval of each CSI-RS in the frequency domain with the reference point; the reference point may be an absolute time domain point (SFN 0) or a frequency domain point (e.g., point A), or may be the time domain start (or end) position and / or the frequency domain start (or end) position of the corresponding SSB; in particular, the reference point of all CSI-RS may be the time domain start (or end) position and / or the frequency domain start (or end) position corresponding to a specific SSB, such as SSB0;

[0108] ■The number of time domain units and / or frequency domain units occupied by each CSI-RS is configured or pre-set by the base station.

[0109] For the above-mentioned better beam reference signal, receive configuration information about the better beam reference signal sent by the base station; according to the configuration information about the better beam reference signal, receive and measure the better beam reference signal corresponding to the downlink beam reference signal; and select one or more better beam reference signals, wherein the method of selecting the better beam reference signal is similar to the method of selecting the downlink beam reference signal. Specifically, for the above-mentioned better beam reference signal, the following operations can also be performed.

[0110] ○ Preferably, the better beam reference signal may also send the SSB of the fine beam (e.g., SSB0-0, SSB0-1), and / or send the DMRS of the PBCH in the SSB, and / or the DMRS in the CORESET (and / or the search space and / or the DCI / PDCCH) (scheduling system information), and / or the DMRS on the PDSCH (carrying system information);

[0111] Preferably, the DMRS signal may be a repeated version of the corresponding signal, such as Figure 8 In the example, one SSB is mapped to two CORESETs, and the two CORESETs are repeatedly transmitted, but the transmission beams used by the two CORESETs are better beams, that is, the DMRS on the two CORESETs can be used as better beam reference signals; wherein, the repeatedly transmitted CORESETs can also facilitate UE to perform combined detection and improve the coverage of the base station;

[0112] ○ Preferably, the repeatedly transmitted CORESET may also be a repeatedly transmitted PBCH, and / or a search space, and / or a DCI / PDCCH, and / or a PDSCH (carrying system information); message 2 (PDCCH and / or PDSCH) or message 4 (PDCCH and / or PDSCH) in a random access process or a RAR of a scheduling message 3 or a DCI / PDCCH of a scheduling message 3;

[0113] Preferably, the related repeated transmission configuration of the repeatedly transmitted signal includes at least one of the following:

[0114] ■The number of times to repeat the sending;

[0115] ■The starting position of the time-frequency resource to be repeatedly sent and / or the size of the time-frequency resource occupied;

[0116] ■ The interval between repeated transmissions of signals (including time domain intervals and / or frequency domain intervals). The time domain interval can be an integer number of time domain units (e.g., 1 OFDM symbol); the frequency domain interval can be an integer number of frequency domain units (e.g., 1 PRB).

[0117] ■The period of repeated signal transmission can be a separate time period configuration, or the same as the period of the corresponding signal; for example, if it is a repeated transmission of CORESET, it can be repeated according to the period of CORESET;

[0118] ■ The repetitive transmission related configuration information may be obtained by broadcast information, and / or DCI for scheduling system information / message 2 / message 3 / message 4, and / or system information, and / or DCI for scheduling paging messages and / or PDSCH configuration of paging messages; preferably, the configuration may be obtained by the UE in a combined manner, for example, configuring one or more groups of repetitive configurations through system information, and then configuring a specific group of repetitive configurations through the DCI in message 2, wherein the group of repetitive configurations includes one or more of the aforementioned configuration information;

[0119] ○ Preferably, the UE can detect multiple repeatedly transmitted signals to select the best repetition version, or the UE can combine and detect multiple repetition signals to achieve the purpose of coverage enhancement; preferably, the UE can measure the DMRS in the detected repetition version, and based on the measured RSRP, obtain one or N repetition versions with the strongest RSRP (for example, represented by the index of the repetition version, such as COREST 0-0, 0-1, etc.) and feed it back to the base station through an uplink signal; wherein the uplink signal can be a group of random access resources (including a group of random access preamble codes and / or a group of random access opportunities) and / or an uplink data channel (for example, PUSCH in message A of two-step random access and / or message 3 of four-step random access) feedback and / or a PUCCH signal after message 4;

[0120] ○ Preferably, the feedback of the selected strongest 1 or N repeated version signals by grouping random access resources can also be expressed as feedback of the beam (better beam) selected by the UE based on the mapping of a better beam reference signal and the random access resource;

[0121] Preferably, the feedback is performed through the PUCCH signal after message 4, including jointly encoding the selected better beam reference index and the fed-back ACK signal; or separately encoding (so that when the fed-back selected better beam reference index is detected incorrectly, the ACK signal can be detected correctly alone);

[0122] Preferably, the repetition of the PDCCH may include at least one of the following:

[0123] ■ Larger CORESET size, i.e., CORESET occupies a larger time-frequency resource size; convenient for providing DCI repetition and / or higher aggregation level (AL);

[0124] ■ Larger search space;

[0125] ■Higher aggregation level (AL);

[0126] ■ Smaller DCI size (i.e. further simplifying the content of DCI to make it contain fewer bits, which is conducive to reducing the code rate and obtaining higher coding gain). In particular, the DCI in the initial access process is minimized, such as the DCI on message 2 / B, or the DCI of message 3 retransmission or message 4;

[0127] ○ Preferably, the downlink signal of the UE in the random access process can be quasi-coloated (QCL) with the selected better downlink beam reference signal; for example, the UE can assume that the random access message 2 (DMRS in PDCCH and / or PDSCH) to be received is quasi-colocated with the previously selected CSI-RS 0-0, that is, the downlink beam of the UE simply sending message 2 has the same beam characteristics as part or all of CSI-RS 0-0; similarly, it can also be considered that the PDCCH (DMRS in) of the scheduling message 3 and / or message 4 (DMRS in PDCCH and / or PDSCH) are quasi-colocated with the selected better downlink beam reference;

[0128] ○ Preferably, the selected better downlink beam reference signal is the better downlink beam reference signal that is most recently fed back by the UE through an uplink signal or is determined to be correct.

[0129] By referring to the above Figures 6 to 8 The described method, depending on the configured parameters, can achieve the purpose of coverage enhancement

[0130] Fig. 9 is a block diagram illustrating a UE according to an embodiment of the present disclosure.

[0131] refer to Fig. 9 UE (900) includes a transceiver (901), a processor (902) and a memory (903). The transceiver (901), the processor (902) and the memory (903) are configured to perform the operations shown in the figure (for example, Figures 1 to 8 ) or the operations of the UE described above.

[0132] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

[0133] It will be appreciated by those skilled in the art that the present disclosure includes devices for performing one or more of the operations described in the present disclosure. These devices may be specially designed and manufactured for the desired purpose, or may include known devices in general-purpose computers. These devices have computer programs stored therein, which are selectively activated or reconstructed. Such computer programs may be stored in a device (e.g., computer) readable medium or in any type of medium suitable for storing electronic instructions and coupled to a bus, respectively, the computer readable medium including but not limited to any type of disk (including floppy disk, hard disk, optical disk, CD-ROM, and magneto-optical disk), ROM (Read-Only Memory), RAM (Random Access Memory), EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), flash memory, magnetic card or optical card. That is, the readable medium includes any medium that stores or transmits information in a readable form by a device (e.g., computer).

[0134] Those skilled in the art will appreciate that each block in these structure diagrams and / or block diagrams and / or flow charts and combinations of blocks in these structure diagrams and / or block diagrams and / or flow charts can be implemented using computer program instructions. Those skilled in the art will appreciate that these computer program instructions can be provided to a general-purpose computer, a professional computer, or a processor of other programmable data processing methods to implement, thereby executing the scheme specified in the block or multiple blocks of the structure diagrams and / or block diagrams and / or flow charts disclosed in the present disclosure through the processor of the computer or other programmable data processing method.

[0135] Those skilled in the art will appreciate that the various operations, methods, steps, measures, and schemes discussed in the present disclosure may be alternated, altered, combined, or deleted. Furthermore, other steps, measures, and schemes in the various operations, methods, and processes discussed in the present disclosure may also be alternated, altered, rearranged, decomposed, combined, or deleted. Furthermore, the steps, measures, and schemes in the prior art that are similar to those disclosed in the present disclosure may also be alternated, altered, rearranged, decomposed, combined, or deleted.

[0136] The above description is only a partial implementation mode of the present disclosure. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present disclosure. These improvements and modifications should also be regarded as the protection scope of the present disclosure.

Claims

1. A method performed by a user equipment UE in a wireless communication system, comprising: receiving a first reference signal RS from a base station, receiving, from the base station, a plurality of second RSs mapped to the first RS based on configuration information, the configuration information including information about the number of the plurality of second RSs mapped to the first RS; Determine at least one second RS among the plurality of second RSs having a reference signal received power RSRP greater than a first threshold; as well as Based on the mapping of the multiple second RSs to the random access resources or through message 3, feedback on at least one beam corresponding to the at least one second RS is sent to the base station.

2. The method according to claim 1, wherein: The first RS corresponds to a first beam, and each of the beams corresponding to the plurality of second RSs is thinner than the first beam.

3. The method according to claim 1, further comprising: receiving the configuration information from a base station; Based on the configuration information, RSRPs of the plurality of second RSs are measured.

4. The method according to claim 1, wherein: Also includes: One or more first RSs are selected based on the number of the one or more first RSs and a second threshold for the RSRP.

5. The method according to claim 1, wherein: The configuration information also includes at least one of the following: Information about time-frequency unit intervals between the plurality of second RSs and a time-frequency reference point; Information about the number of time domain units occupied by the plurality of second RSs; or Information about the number of frequency domain units occupied by the plurality of second RSs.

6. The method according to claim 1, wherein: The plurality of second RSs include at least one of the following: Channel state information reference signal CSI-RS; Synchronization signal block SSB; A demodulation reference signal DMRS of a physical broadcast channel PBCH in the SSB; DMRS in the control resource set CORESET used to schedule system information; DMRS in the search space; DMRS in downlink control information; DMRS received in the physical downlink control channel PDCCH; as well as DMRS received on the physical downlink shared channel PDSCH for system information.

7. The method according to claim 6, in, The DMRS is a DMRS for repeated transmission of a corresponding signal, and The repeatedly sent corresponding signal includes at least one of the following: Repeatedly sent CORESET; Repeatedly transmitted PBCH, and / or search space; Repeatedly sent DCI / PDCCH; Repeatedly sent PDSCH carrying system information; Repeatedly sent message 2 or message 4 during the ad-hoc access process; and The RAR or DCI / PDCCH of the scheduling message 3 is sent repeatedly.

8. The method according to claim 1, wherein: The configuration information includes information about repeated transmission of the plurality of second RSs, and The information about the repeated transmission includes at least one of the following: Information about the number of retransmissions; Information about the starting position of the repeatedly transmitted time-frequency resource; Information about the size of the time-frequency resource to be sent repeatedly; information about a time interval between the plurality of second RSs that are repeatedly transmitted; information about a frequency interval between the plurality of repeatedly transmitted second RSs; or Information about periods of the repeatedly transmitted plurality of second RSs.

9. The method according to claim 7 or 8, further comprising performing at least one of the following for the repeatedly transmitted signal: Selecting a repeatedly transmitted signal by performing detection on each of a plurality of repeatedly transmitted signals; Performing combined detection on multiple repeatedly transmitted signals; and For a selected repeated signal, feedback is sent via an uplink signal, wherein: The uplink signal is at least one of a group of random access resources, an uplink data channel, and a physical uplink control channel PUCCH signal after message 4.

10. The method according to claim 1, wherein: When the uplink signal used for feedback is the PUCCH signal after message 4: Feedback is performed by jointly encoding the second RS with the fed-back ACK signal or separately encoding them.

11. The method according to claim 1, wherein: The at least one second RS is quasi-co-located with a downlink signal of a random access process.

12. The method according to claim 1, wherein: The at least one second RS is the second RS that is fed back most recently through an uplink signal or is determined to be correct.

13. A user equipment UE, comprising: A transceiver, receiving signals and / or transmitting signals; A memory for storing executable instructions; as well as A processor runs the stored instructions to perform the method according to any one of claims 1 to 12.

14. A method performed by a base station in a wireless communication system, comprising: Sending a first reference signal RS to a user equipment UE, Based on configuration information, a plurality of second RSs mapped to the first RS are sent to the UE, the configuration information including information about the number of the plurality of second RSs mapped to the first RS; wherein at least one second RS having a reference signal received power RSRP greater than a first threshold among the plurality of second RSs is determined; and Based on the mapping of the plurality of second RSs to random access resources or through message 3, feedback on at least one beam corresponding to the at least one second RS is received from the UE.

15. The method according to claim 14, wherein: The first RS corresponds to a first beam, and each of the beams corresponding to the plurality of second RSs is thinner than the first beam.

16. The method according to claim 14, wherein: Also includes: Sending the configuration information to the UE; The RSRPs of the multiple second RSs are measured based on the configuration information.

17. The method according to claim 14, wherein: The one or more first RSs are selected based on a number of the one or more first RSs and a second threshold for the RSRP.

18. The method according to claim 14, wherein: The configuration information also includes at least one of the following: Information about time-frequency unit intervals between the plurality of second RSs and a time-frequency reference point; Information about the number of time domain units occupied by the plurality of second RSs; or Information about the number of frequency domain units occupied by the plurality of second RSs.

19. The method according to claim 14, wherein: The plurality of second RSs include at least one of the following: Channel state information reference signal CSI-RS; Synchronization signal block SSB; A demodulation reference signal DMRS of a physical broadcast channel PBCH in the SSB; DMRS in the control resource set CORESET used to schedule system information; DMRS in the search space; DMRS in downlink control information; DMRS received in the physical downlink control channel PDCCH; as well as DMRS received on the physical downlink shared channel PDSCH for system information.

20. The method according to claim 19, in, The DMRS is a DMRS for repeated transmission of a corresponding signal, and The repeatedly sent corresponding signal includes at least one of the following: Repeatedly sent CORESET; Repeatedly transmitted PBCH, and / or search space; Repeatedly sent DCI / PDCCH; Repeatedly sent PDSCH carrying system information; Repeatedly sent message 2 or message 4 during the ad-hoc access process; and The RAR or DCI / PDCCH of the scheduling message 3 is sent repeatedly.

21. The method according to claim 14, wherein: The configuration information includes information about repeated transmission of the plurality of second RSs, and The information about the repeated transmission includes at least one of the following: Information about the number of retransmissions; Information about the starting position of the repeatedly transmitted time-frequency resource; Information about the size of the time-frequency resource to be sent repeatedly; information about a time interval between the plurality of second RSs that are repeatedly transmitted; information about a frequency interval between the plurality of repeatedly transmitted second RSs; or Information about periods of the repeatedly transmitted plurality of second RSs.

22. The method according to claim 20 or 21, wherein: A repeatedly transmitted signal is selected by performing detection on each of a plurality of repeatedly transmitted signals; and / or Multiple repeated transmitted signals are combined for detection; and / or The selected repeatedly transmitted signal is fed back via an uplink signal, wherein the uplink signal is at least one of a group of random access resources, an uplink data channel, and a physical uplink control channel PUCCH signal after message 4.

23. The method according to claim 14, wherein: When the uplink signal used for feedback is the PUCCH signal after message 4: The feedback is performed by jointly encoding the second RS and the fed-back ACK signal or separately encoding them.

24. The method according to claim 14, wherein: The at least one second RS is quasi-co-located with a downlink signal of a random access process.

25. The method of claim 14, wherein: The at least one second RS is the second RS that is fed back most recently through an uplink signal or is determined to be correct.

26. A base station, comprising: A transceiver, receiving signals and / or transmitting signals; A memory for storing executable instructions; as well as A processor runs the stored instructions to perform the method according to any one of claims 14 to 25.

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