Method and apparatus for uplink signal transmission

Abstract

The present disclosure provides a method and device for confirming resource configuration of uplink signal transmission. According to the method and device for confirming resource configuration of uplink signal transmission according to aspects of the present disclosure, a user equipment (UE) can be caused to perform multiple repetitions in transmission of an uplink data signal, where the multiple repetitions can use different transmit beams, can use different transport block sizes and / or different modulation and coding schemes according to certain rules; and a redundancy version is determined based on certain manners. In addition, uplink control information can also be carried in the uplink data transmission to inform a receiving device of some additional auxiliary information before decoding of the data channel.

Description

TECHNICAL FIELD

[0001] The disclosure relates to the field of wireless communication, and more particularly, to a method and apparatus for uplink signal transmission. BACKGROUND

[0002] To meet the demand for wireless data traffic "off the hook" since deployment of 4G communication systems, efforts have been made to develop an improved 5G or pre-5G communication system. Therefore, the 5G or pre-5G communication system is also called a "beyond 4G network" or a "post LTE system."

[0003] A 5G communication system is implemented in a higher frequency (millimeter wave, mmWave) band, such as 60 GHz band, to accomplish a higher data rate. To mitigate a propagation loss of radio waves and increase a transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam forming, large scale antenna techniques are discussed in 5G communication systems.

[0004] In addition, in 5G communication systems, development for system network improvement is under way based on advanced small cells, cloud radio access networks (RANs), ultra-dense networks, a device to device (D2D) communication, a wireless backhaul, a moving network, a cooperative communication, coordinated multi-points (CoMP), reception-end interference cancellation and the like.

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

[0006] Aspects of the disclosure are to address at least the above-mentioned problems and / or disadvantages, and to provide at least the advantages described below. Accordingly, aspects of the disclosure provide a method and apparatus for confirming resource configuration for uplink signal transmission. The method and apparatus for confirming resource configuration for uplink signal transmission according to aspects of the disclosure can enable a user equipment (UE) to perform transmission of a random access signal using multiple transmission beams in one uplink transmission process, and can obtain the effect of repeated transmission of a signal to obtain coverage enhancement and better beam management for multiple transmission beams.

[0007] According to an aspect of the disclosure, a method for uplink signal transmission includes obtaining configuration information for uplink signal repetition transmission, and performing repetition transmission of an uplink signal based on the configuration information.

[0008] According to an aspect of the present disclosure, wherein the configuration information comprises at least one of: a repetition transmission type, an acknowledgement of a redundancy version index in a repetition transmission, and an acknowledgement of a transmission beam in a repetition transmission.

[0009] According to an aspect of the present disclosure, wherein the repetition transmission type comprises at least one of: a first type, a same physical uplink shared channel (PUSCH) repetition transmission is configured on each slot; a second type, the configured PUSCH repetition transmission is consecutive; and a third type, a user equipment autonomously determines a repetition number / transmission block size (TBS) / modulation and coding strategy (MCS).

[0010] According to an aspect of the present disclosure, wherein the configuration information about the first type in the repetition transmission type comprises at least one of: a first slot after X1 slot intervals from an ending position of a slot where a downlink signal scheduling an uplink transmission is located is a starting slot of the scheduled uplink transmission; a starting time domain unit position of a PUSCH transmission in a slot and / or a number of occupied time domain units; and a number of PUSCH repetition transmissions, wherein X1 is configured by a network side or predetermined.

[0011] According to an aspect of the present disclosure, wherein the configuration information about the second type in the repetition transmission type comprises at least one of: a first slot after X1 slot intervals from an ending position of a slot where a downlink signal scheduling an uplink transmission is located is a starting slot of the scheduled uplink transmission; a starting time domain unit position of a PUSCH transmission in a slot and / or a number of occupied time domain units; a number of PUSCH repetition transmissions; and a length of a PUSCH transmission time window.

[0012] According to an aspect of the present disclosure, the method further comprises that, when a time domain unit configured for a PUSCH repetition transmission meets one or more of the following conditions, the UE will not transmit a PUSCH on the configured time domain unit: the configured time domain unit overlaps with a downlink part in an uplink-downlink configuration; the configured time domain unit overlaps with a flexible part in the uplink-downlink configuration; the configured time domain unit overlaps with a specific downlink signal configured to be transmitted by a base station; and an interval between a starting position of the configured time domain unit and an ending position of the downlink part in the uplink-downlink configuration is not greater than a first interval value.

[0013] According to an aspect of the present disclosure, wherein the specific downlink signal is at least one of: a synchronization signal block (SSB) configured to be transmitted by the base station, a SIB1 physical downlink shared channel (PDSCH) configured to be transmitted by the base station, or a control resource opportunity (CORESET) and a search space scheduling system information.

[0014] According to an aspect of the present disclosure, when the UE does not transmit PUSCH on the configured time domain unit, the UE performs at least one of the following operations: if the configured time domain unit contains X demodulation reference signal (DMRS) symbols, the first X symbols in the remaining time domain units on the slot used for transmitting PUSCH are used to transmit DMRS symbols; according to the remaining time domain units on the slot used for transmitting PUSCH, the number of resource elements is recalculated for data to be transmitted, a modulation and coding scheme is determined, and the lowest modulation and coding scheme that satisfies the size of the data to be transmitted is selected; and when transmitting according to the configured modulation and coding scheme and / or the number of resource elements, a signal is transmitted on the configured time domain unit corresponding to the time domain unit that is not used for transmission.

[0015] According to an aspect of the present disclosure, the method further includes, within the PUSCH transmission time window: deriving a plurality of consecutive PUSCH transmissions according to the start of the first PUSCH transmission repetition and the length of the transmission until the interval between the end position of the last PUSCH transmission repetition and the end position of the PUSCH transmission time window is less than a second threshold value, and deriving a plurality of consecutive PUSCH transmissions according to the start of the first PUSCH transmission repetition and the length of the transmission until the number of nominal repetitions reaches the number of PUSCH transmission repetitions configured by the base station or preset, wherein the second threshold value is the length of the PUSCH transmission or a length value configured by the base station or preset.

[0016] According to an aspect of the present disclosure, the method further includes, for the first type of repeated transmission, when the PUSCH repetition transmission is expanded to the next slot, the UE performs one of the following operations: when the condition is met, not transmitting PUSCH on the configured time domain unit; and when the condition is not met, transmitting PUSCH on the configured time domain unit.

[0017] According to an aspect of the present disclosure, the method further includes, when the PUSCH repetition transmission is expanded to the next slot, the UE performs one of the following operations: performing PUSCH repetition transmission across the inter-slot interval; and splitting the cross-slot PUSCH transmission according to the slot interval, and performing transmission according to the split PUSCH repetition transmission.

[0018] According to an aspect of the present disclosure, the method further comprises performing at least one of the following according to configuration information of a third type in the repetition transmission types: selecting a position of one repetition to transmit the PUSCH according to a predefined rule; determining a number of repetitions, and determining a TBS size of each PUSCH repetition transmission according to the number of repetitions; determining a number of repetitions, and determining the PUSCH repetition transmission according to a TBS indicated by the base station; determining a number of repetitions, combining time-frequency resources of the determined PUSCH repetition transmissions, and transmitting on the resources according to a TBS size or MCS indicated by the base station; and determining a number of repetitions, and determining a TBS size for transmission according to parameters configured by the base station and an amount of data to be transmitted by the user equipment.

[0019] According to an aspect of the present disclosure, wherein the predefined rule comprises at least one of: a position of a PUSCH repetition closest to an end position of a slot in which a downlink of a scheduled uplink transmission is located; and randomly selecting one of the PUSCH transmission repetitions with equal probability between the PUSCH transmission repetitions.

[0020] According to an aspect of the present disclosure, wherein determining the number of repetitions comprises at least one of: determining according to a maximum number of repetitions available or a maximum number of repetitions configured; determining according to a result of a comparison of a received signal power of a downlink reference signal with a corresponding threshold; and determining according to a number of transmit beams the user equipment has.

[0021] According to an aspect of the present disclosure, wherein the confirmation of the redundancy version index in the repetition transmission comprises one or more of: reusing a same redundancy version for a plurality of PUSCH transmission repetitions in all PUSCH transmissions; reusing a same redundancy version for a plurality of PUSCH transmission repetitions in a same PUSCH transmission, and using redundancy version indexes in order for PUSCH transmission repetitions in different PUSCH transmissions; using redundancy version indexes in order for a plurality of PUSCH transmission repetitions in a same PUSCH transmission, and reusing a same redundancy version for PUSCH transmission repetitions in different PUSCH transmissions; and using redundancy version indexes in order for a plurality of PUSCH transmission repetitions in all PUSCH transmissions.

[0022] According to an aspect of the present disclosure, wherein the order is an order arranged according to a correlation and / or a degree of complementarity between different redundancy versions.

[0023] According to an aspect of the present disclosure, wherein the confirmation of the transmit beams in the repeated transmissions comprises one or more of: using a same transmit beam for multiple PUSCH transmissions among all PUSCH transmissions; using a same transmit beam for multiple PUSCH transmissions among a same PUSCH transmission and a different transmit beam for different PUSCH transmissions; and using different transmit beams for multiple PUSCH transmissions among a same PUSCH transmission and a same transmit beam for different PUSCH transmissions.

[0024] According to an aspect of the present disclosure, the method further comprises transmitting assistance information, wherein the assistance information comprises at least one of: a number of repetitions determined by the UE, a number and / or index of transmit beams of the UE, a TBS and / or MCS determined by the UE, one or more downlink beam reference signal indices selected by the UE.

[0025] According to an aspect of the present disclosure, wherein the uplink signal is an uplink signal transmitted in a random access procedure.

[0026] According to another aspect of the present disclosure, a user equipment (UE) comprises: a transceiver configured to receive and transmit signals from and to a base station; a memory configured to store executable instructions; and a processor configured to execute the stored instructions to perform the above-described method. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above and other objects, features and advantages of the present disclosure will be more clearly understood from the following description taken in conjunction with the accompanying drawings, in which:

[0028] Figure 1 A wireless network 100 according to various embodiments of the present disclosure is illustrated;

[0029] Figure 2a An example wireless transmit path according to embodiments of the present disclosure is illustrated;

[0030] Figure 2b An example wireless receive path according to embodiments of the present disclosure is illustrated;

[0031] Figure 3a An example UE 116 according to embodiments of the present disclosure is illustrated;

[0032] Figure 3b An example gNB 102 according to embodiments of the present disclosure is illustrated;

[0033] Figure 4 A contention-based random access procedure according to embodiments of the present disclosure is illustrated;

[0034] Figure 5FIG. 1 shows an example of a message 3 (Msg3) PUSCH repetition first type according to embodiments of the present disclosure;

[0035] Figure 6 FIG. 2 shows an example of a PUSCH repetition second type according to embodiments of the present disclosure;

[0036] Figure 7 FIG. 3 shows an example of a PUSCH repetition third type according to embodiments of the present disclosure;

[0037] Figure 8 FIG. 4 shows an example of a RV determination manner in PUSCH repetition according to embodiments of the present disclosure;

[0038] Figure 9 FIG. 5 shows an example of a transmission beam confirmation in PUSCH repetition according to embodiments of the present disclosure; and

[0039] Figure 10 FIG. 6 is a block diagram illustrating a UE according to embodiments of the present disclosure. DETAILED DESCRIPTION

[0040] The text and drawings are provided only as examples to help the reader understand the present disclosure. They are not intended to be, and should not be interpreted as, limiting the scope of the present disclosure in any way. While certain embodiments and examples have been provided, it will be understood by those skilled in the art that changes can be made and substitutions can be made without departing from the scope of the present disclosure as disclosed herein.

[0041] It can be understood by those skilled in the art that, unless specifically stated otherwise, singular forms “a”, “an” and “the” as used herein can also include plural forms. It should be further understood that the use of the term “including” in the specification of the present disclosure means that the presence of the stated 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 say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there can be an intermediate element. In addition, “connected” or “coupled” used herein can include wireless connection or wireless coupling. The phrase “and / or” used herein includes all or any one of the associated listed items and all combinations thereof.

[0042] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0043] Those skilled in the art will understand that the terms "terminal" and "terminal device" as used herein include both devices that receive wireless signals, devices that only possess wireless signal receiver capabilities without transmission capabilities, and devices with receiving and transmitting hardware, devices that have receiving and transmitting hardware capable of bidirectional communication over a bidirectional communication link. Such devices may include: cellular or other communication devices having a single-line display, a multi-line display, or a cellular or other communication device without a multi-line display; Personal Communications Service (PCS) that may combine voice, data processing, fax, and / or data communication capabilities; PDAs (Personal Digital Assistants) that may include radio frequency receivers, pagers, internet / intranet access, web browsers, notebooks, calendars, and / or Global Positioning System (GPS) receivers; and conventional laptops and / or handheld computers or other devices that have and / or include radio frequency receivers. As used herein, "terminal" or "terminal device" can be portable, transportable, installed in a means of transportation (air, sea, and / or land), or suitable and / or configured to operate locally and / or in a distributed manner, operating in any other location on Earth and / or in space. "Terminal" or "terminal device" as used herein can also be a communication terminal, an internet access terminal, or a music / video playback terminal, such as a PDA, a Mobile Internet Device (MID), and / or a mobile phone with music / video playback capabilities, or a smart TV, set-top box, etc.

[0044] Those skilled in the art will understand that the term "base station" (BS) or "network equipment" as used herein may refer to eNB, eNodeB, NodeB, or base transceiver unit (BTS) or gNB, depending on the technology and terminology used.

[0045] Those skilled in the art of the technology can understand that the "memory" used herein can be any type suitable for the technical environment herein and can 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.

[0046] Those skilled in the art of the technology can understand that the "processor" used herein can be any type suitable for the technical environment herein, including but not limited to one or more of the following: general-purpose computers, special-purpose computers, microprocessors, digital signal processors DSP and multi-core processor architecture-based processors.

[0047] The time domain unit (also referred to as time unit) in the present disclosure can be: one OFDM symbol, one OFDM symbol group (composed of multiple OFDM symbols), one slot, one slot group (composed of multiple slots), one subframe, one subframe group (composed of multiple subframes), one system frame, one system frame group (composed 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 slots plus N2 OFDM symbols.

[0048] The frequency domain unit in the present disclosure can be: one subcarrier, one subcarrier group (composed of multiple subcarriers), one resource block (RB) (also referred to as physical resource block (PRB)), one resource block group (composed of multiple RBs), one bandwidth part (BWP), one bandwidth part group (composed of multiple BWPs), one frequency band / carrier, one frequency band group / carrier group; It can also be an absolute frequency domain unit, such as 1 hertz, 1 kilohertz, etc.; The frequency domain unit can also be a combination of multiple granularities, such as M1 PRBs plus M2 subcarriers.

[0049] Embodiments according to the present disclosure will be described in detail below with reference to the accompanying drawings.

[0050] Figure 1 An example wireless network 100 according to various embodiments of the present disclosure is shown. Figure 1 The embodiments of the wireless network 100 shown in FIG. 1 are for illustration only. Other embodiments of the wireless network 100 can be used without departing from the scope of the present disclosure.

[0051] Wireless network 100 includes a gNodeB (gNB) 101, a gNB 102, and a gNB 103. GNB 101 communicates with gNB 102 and gNB 103. GNB 101 also

[0052] Depending on the network type, other well-known terms can be used instead of "gNodeB" or "gNB," such as "base station" or "access point." For the purposes of this patent document, the terms "gNodeB" and "gNB" are used to refer to the network infrastructure components that provide wireless access to remote terminals. Also, depending on the network type, other well-known terms can be used instead of "user equipment" or "UE," such as "mobile station" or "subscriber station" or "remote terminal" or "wireless terminal" or "user device." For the purposes of this patent document, the terms "user equipment" and "UE" are used to refer to remote wireless equipment that wirelessly accesses a gNB, whether the UE is a mobile device (such as a mobile telephone or smartphone) or what is commonly considered a stationary device (such as a desktop computer or vending machine).

[0053] GNB 102 provides wireless broadband access to network 130 for a first plurality of user equipment (UEs) within a coverage area 120 of gNB 102. The first plurality of UEs includes UE 111, which can be located in a small business (SB); UE 112, which can be located in an enterprise (E); UE 113, which can be located in a WiFi hotspot (HS); UE 114, which can be located in a first residence (R); UE 115, which can be located in a second residence (R); and UE 116, which can be a mobile device (M), such as a cell phone, a wireless laptop, a wireless PDA, or the like. GNB 103 provides wireless broadband access to network 130 for a second plurality of UEs within a coverage area 125 of gNB 103. The second plurality of UEs includes UE 115 and UE 116. In some embodiments, one or more of gNBs 101-103 can communicate with each other and with UEs 111-116 using 5G, long term evolution (LTE), LTE-A, WiMAX, or other advanced wireless communication techniques.

[0054] Dotted lines show the approximate extents of the coverage areas 120 and 125, which are shown as approximately circular for the purposes of illustration and explanation only. It should be clearly understood that the coverage areas associated with gNBs, such as coverage areas 120 and 125, can have other shapes, including irregular shapes, depending on the configuration of gNBs and variations in the radio environment associated with natural and man-made obstructions.

[0055] As described in more detail below, one or more of the gNBs 101, 102, and 103 include a 2D antenna array as described in embodiments of the disclosure. In some embodiments, one or more of the gNBs 101, 102, and 103 support codebook design and structure for systems with 2D antenna arrays.

[0056] Although Figure 1 various changes can be made to Figure 1 wireless network 100. For example, wireless network 100 could include any number of gNBs and any number of UEs in any suitable arrangement. Also, gNB 101 could communicate directly with any number of UEs and provide those UEs access to network 130.

[0057] Figure 2a An example wireless transmit path is shown according to embodiments of the present disclosure; while Figure 2b An example wireless receive path is shown according to embodiments of the present disclosure. In the following description, the transmit path 200 can be described as implemented at a gNB (such as the gNB 102), while the receive path 250 can be described as implemented at a UE (such as the UE 116). However, it is to be understood that the receive path 250 can be implemented at a gNB and that the transmit path 200 can be implemented at a UE. In some embodiments, the receive path 250 is configured to support codebook design and structure for systems with 2D antenna arrays as described in embodiments of the present disclosure.

[0058] The transmit path 200 includes a channel coding and modulation block 205, a serial-to-parallel (S-to-P) block 210, a size N inverse fast Fourier transform (IFFT) block 215, a parallel-to-serial (P-to-S) block 220, a cyclic prefix addition block 225, and an up-converter (UC) 230. The receive path 250 includes a down-converter (DC) 255, a cyclic prefix removal block 260, a serial-to-parallel (S-to-P) block 265, a size N fast Fourier transform (FFT) block 270, a parallel-to-serial (P-to-S) block 275, and a channel decoding and demodulation block 280.

[0059] In transmit path 200, 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 modulated symbols. Serial-to-parallel (S-to-P) block 210 converts (e.g., demultiplexes) the serial modulated symbols into parallel data to generate N parallel symbol streams, where N is the number of IFFT / FFT points used in gNB 102 and UE 116. N-point IFFT block 215 performs IFFT operations on the N parallel symbol streams to generate a time-domain output signal. Parallel-to-serial block 220 converts (e.g., multiplexes) the parallel time-domain output symbols from N-point IFFT block 215 to generate a serial time-domain signal. Cyclic prefix addition block 225 inserts a cyclic prefix into the time-domain signal. Upconverter 230 modulates (e.g., upconverts) the output of the added cyclic prefix block 225 to an RF frequency for transmission via a wireless channel. The signal can also be filtered at the baseband before being converted to the RF frequency.

[0060] The RF signal transmitted from gNB 102 reaches UE 116 after passing through the wireless channel, and UE 116 performs the opposite operation to that at gNB 102. Downconverter 255 downconverts the received signal to the baseband frequency, and cyclic prefix removal 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.

[0061] Each of gNBs 101-103 can implement a transmission path 200 similar to that used for transmission to UEs 111-116 in the downlink, and a reception path 250 similar to that used for reception from UEs 111-116 in the uplink. Similarly, each of UEs 111-116 can implement a transmission path 200 for transmission to gNBs 101-103 in the uplink, and a reception path 250 for reception from gNBs 101-103 in the downlink.

[0062] Figure 2a and Figure 2b Each of the components can be implemented using only hardware, or using a combination of hardware and software / firmware. As a specific example, Figure 2a and Figure 2bAt least some of the components in the diagram can be implemented in software, while others can be implemented by configurable hardware or a mixture of software and configurable hardware. For example, the FFT block 270 and the IFFT block 215 can be implemented as configurable software algorithms, where the value of the number of points N can be modified depending on the implementation.

[0063] Furthermore, although described as using FFT and IFFT, this is illustrative only and should not be construed as limiting the scope of the disclosure. Other types of transforms can be used, such as discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT) functions. It will be appreciated that for DFT and IDFT functions, the value of the variable N can be any integer (such as 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of the variable N can be any integer that is a power of 2 (such as 1, 2, 4, 8, 16, etc.).

[0064] Although Figure 2a and Figure 2b various changes can be made to Figure 2a and Figure 2b For example, Figure 2a and Figure 2b various components in the diagram can be combined, further subdivided, or omitted and additional components can be added according to particular needs. Also, Figure 2a and Figure 2b are intended to show 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 communication in a wireless network.

[0065] Figure 3a An example UE 116 according to this disclosure is shown. Figure 3a The embodiments of the UE 116 shown in Figure 1 The UEs 111-115 of can have the same or similar configuration. However, UEs have a wide variety of configurations, and thus Figure 3a The scope of the disclosure is not limited to any particular implementation of a UE.

[0066] The UE 116 includes antennas 305, radio frequency (RF) transceivers 310, transmit (TX) processing circuitry 315, a microphone 320, and receive (RX) processing circuitry 325. The UE 116 also includes a speaker 330, a processor / controller 340, an input / output (I / O) interface 345, input device(s) 350, a display 355, and a memory 360. The memory 360 includes an operating system (OS) 361 and one or more applications 362.

[0067] The RF transceiver 310 receives, from the antennas 305, incoming RF signals transmitted by gNBs of the wireless network 100. The RF transceiver 310 down-converts the incoming RF signals to generate intermediate frequency (IF) or baseband signals. The IF or baseband signals are sent to the RX processing circuitry 325, which generates processed baseband signals by filtering, decoding, and / or digitizing the IF or baseband signals. The RX processing circuitry 325 transmits the processed baseband signals to the speaker 330 (such as for voice data) or to the processor / controller 340 (such as for web browsing data) for further processing.

[0068] The TX processing circuitry 315 receives analog or digital voice data from the microphone 320 or other outgoing baseband data (such as web access data, e-mail, or interactive video game data) from the processor / controller 340. The TX processing circuitry 315 encodes, multiplexes, and / or digitizes the outgoing baseband data to generate processed baseband or IF signals. The RF transceiver 310 receives the outgoing processed baseband or IF signals from the TX processing circuitry 315 and up-converts the baseband or IF signals to RF signals that are transmitted via the antennas 305.

[0069] The processor / controller 340 can include one or more processors or other processing devices and execute instructions 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 by the RF transceiver 310, the RX processing circuitry 325, and the TX processing circuitry 315, in accordance with well-known principles. In some embodiments, the processor / controller 340 includes at least one microprocessor or microcontroller.

[0070] The processor / controller 340 can also execute other processes and programs resident in the memory 360, such as operations for channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the present disclosure. The processor / controller 340 can move data into or out of the memory 360 as required by the processes

[0071] The processor(s) / controller(s) 340 are also coupled to input device(s) 350 and a display 355. The operator of the UE 116 can use the input device(s) 350 to enter data into the UE 116. The display 355 can be a liquid crystal display or other display capable of rendering text and / or at least limited graphics, such as from web sites. The memory 360 is coupled to the processor(s) / controller(s) 340. A portion of the memory 360 can include a random access memory (RAM), and another portion of the memory 360 can include a Flash memory or other read-only memory (ROM).

[0072] Although Figure 3a various changes can be made to Figure 3a For example, Figure 3a various components in the UE 116 can be combined, further subdivided, or omitted and additional components can be added according to particular needs. As a particular example, the processor(s) / controller(s) 340 could be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). Also, while Figure 3a the UE 116 is illustrated as a mobile phone or smart phone, the UE can be configured to operate as other types of mobile or stationary devices.

[0073] Figure 3b An example gNB 102 according to this disclosure is illustrated. Figure 3b The embodiment of the gNB 102 illustrated in Figure 1 other gNBs can have the same or similar configuration. However, gNBs come in a wide variety of configurations, and Figure 3b the scope of this disclosure is not limited to any particular implementation of a gNB. It is noted that the gNBs 101 and 103 can include the same or similar structure as the gNB 102.

[0074] As Figure 3b illustrated in FIG. 3C, the 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. The gNB 102 also includes a controller / processor 378, a memory 380, and a backhaul or network interface 382.

[0075] RF transceivers 372a-372n receive incoming RF signals, such as signals transmitted by the UE or other gNBs, from antennas 370a-370n. RF transceivers 372a-372n down-convert the incoming RF signals to generate IF or baseband signals. The IF or baseband signals are sent to RX processing circuitry 376, which generates processed baseband signals by filtering, decoding, and / or digitizing the baseband or IF signals. RX processing circuitry 376 sends the processed baseband signals to controller / processor 378 for further processing.

[0076] 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. RF transceivers 372a-372n receive the outgoing processed baseband or IF signal from the TX processing circuit 374 and up-convert the baseband or IF signal into an RF signal transmitted via antennas 370a-370n.

[0077] The controller / processor 378 may include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, the controller / processor 378 may control the reception of forward channel signals and the transmission of backward channel signals via RF transceivers 372a-372n, RX processing circuitry 376, and TX processing circuitry 374, according to known principles. The controller / processor 378 may also support additional functions, such as more advanced wireless communication functions. For example, the controller / processor 378 may perform a BIS process, such as by a blind interference sensing (BIS) algorithm, and decode the received signal after subtracting interference. The controller / processor 378 may support any of a wide variety of other functions in the gNB 102. In some embodiments, the controller / processor 378 includes at least one microprocessor or microcontroller.

[0078] The controller / processor 378 is also capable of executing programs and other processes, such as a basic operating system, residing in the memory 380. The controller / processor 378 is also capable of supporting channel quality measurement and reporting for systems having 2D antenna arrays as described in embodiments of this disclosure. In some embodiments, the controller / processor 378 supports communication between entities such as web RTCs. The controller / processor 378 is capable of moving data into or out of the memory 380 as needed for the execution of processes.

[0079] The controller / processor 378 is also coupled to the backhaul or network interface 382. The backhaul or network interface 382 allows the gNB 102 to communicate with other devices or systems over a backhaul connection or over a network. It should be appreciated that the backhaul or network interface 382 could be any of a wide variety of wired or wireless interfaces and that the communication could be with another processor or computer program running on it. For example, when the gNB 102 is implemented as part of a cellular communication system such as one 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 over 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 other gNBs over a wired or wireless local area network or over a wired or wireless connection to a larger network such as the Internet. The backhaul or network interface 382 includes any suitable structure supporting communications over a wired or wireless connection, such as an Ethernet or RF transceiver.

[0080] The memory 380 is coupled to the controller / processor 378. The portion of memory 380 could include RAM, and the other portion of memory 380 could include flash memory or other ROM. In certain embodiments, a plurality of instructions to implement a BIS algorithm is stored in the memory. The plurality of instructions is configured to cause the controller / processor 378 to perform a BIS process and decode a received signal after subtracting at least one interference signal determined by the BIS algorithm.

[0081] As described in more detail below, the transmit and receive paths of the gNB 102, implemented using the RF transceivers 372a-372n, TX processing circuitry 374, and / or RX processing circuitry 376, support communication with an aggregation of FDD cells and TDD cells.

[0082] Although Figure 3b various changes can be made to Figure 3b each component shown in FIG. 3. For example, the gNB 102 could include any number of each component shown in FIG. 3. As a particular example, the access point could include a number of backhaul or network interfaces 382, and the controller / processor 378 could support routing Figure 3a functionality to route data between different network addresses. As another particular 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 could include multiple instances of each (such as one per RF transceiver pair).

[0083] Figure 4 A contention-based random access procedure is shown in accordance with examples of the present disclosure.

[0084] Transmissions in a wireless communication system include transmissions from a base station (gNB) to a user equipment (UE, User Equipment), referred to as downlink transmissions, and corresponding time slots are referred to as downlink time slots, and transmissions from a UE to a base station, referred to as uplink transmissions, and corresponding time slots are referred to as uplink time slots.

[0085] In downlink communication of a wireless communication system, a system periodically transmits a synchronization signal and a broadcast channel to a user through a synchronization signal block (SSB, synchronization signal / PBCH block), and the period is referred to as a synchronization signal block period (SSB period) or a synchronization signal block burst period (SSB burst period). Meanwhile, the base station configures a random access configuration period (PRACH configuration period), in which a certain number of random access transmission opportunities (also referred to as random access opportunities, PRACH transmission occasions, ROs) are configured, and all SSBs are mapped to corresponding ROs within a mapping period (a certain length of time).

[0086] In a new radio (NR) communication system, before radio resource control establishment, for example, in a random access process, the performance of random access directly affects the user experience. In a conventional wireless communication system, such as LTE and LTE-Advanced, a random access process is applied to multiple scenarios, such as establishing an initial link, cell switching, reestablishing an uplink, RRC connection reestablishment, and the like, and is divided into contention-based random access (Contention-based Random Access) and contention-free random access (Contention-free Random Access) according to whether a user occupies preamble sequence resources. In contention-based random access, each user selects a preamble sequence from the same preamble sequence resources in the process of attempting to establish an uplink, and multiple users may select the same preamble sequence to send to a base station. Therefore, a conflict resolution mechanism is an important research direction in random access, and how to reduce the conflict probability and how to quickly resolve the conflict that has occurred are key indicators that affect the performance of random access.

[0087] The contention-based random access process in LTE-A is divided into four steps, as follows: Figure 4The random access procedure in LTE is shown in Figure 1. 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, which contains the random access preamble sequence identifier, a timing advance instruction determined according to the time delay between the user and the base station, a temporary cell radio network temporary identifier (C-RNTI), and time-frequency resources allocated for the next uplink transmission of the user. In the third step, the user sends a third message (Msg3) to the base station according to the information in the RAR. Msg3 contains the user terminal identifier and RRC connection request information, 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, which contains the user terminal identifier that wins in the conflict resolution. After detecting its own identifier, the user upgrades the temporary C-RNTI to the C-RNTI and sends an ACK signal to the base station, completing the random access procedure and waiting for scheduling by the base station. Otherwise, the user will start a new random access procedure after a delay.

[0088] For the non-contention-based random access procedure, the base station knows the user identifier and can allocate a preamble sequence to the user. Therefore, the user does not need to randomly select a sequence when sending the preamble sequence, but will use the allocated preamble sequence. After detecting the allocated preamble sequence, the base station sends a corresponding random access response, which includes timing advance and uplink resource allocation information. After receiving the random access response, the user considers that uplink synchronization has been completed and waits for further scheduling by the base station. Therefore, the non-contention-based random access procedure only contains two steps: step one is to send the preamble sequence, and step two is to send the random access response.

[0089] The random access procedure in LTE is suitable for the following scenarios:

[0090] 1. Initial access in RRC_IDLE;

[0091] 2. Reestablishment of RRC connection;

[0092] 3. Cell handover;

[0093] 4. Arrival of downlink data in RRC_CONNECTED and request for a random access procedure (when the uplink is not synchronized);

[0094] 5. Arrival of uplink data in RRC_CONNECTED and request for a random access procedure (when the uplink is not synchronized or the PUCCH resource does not allocate resources for scheduling requests); and

[0095] 6. Positioning.

[0096] However, in the system using beamforming and / or in the system with limited coverage, in the initial access stage, the user may eventually fail to access due to mobility or other reasons, for example, the reception of message 3 sent by the user equipment in the random access process fails; therefore, how to provide sufficient beamforming gain and / or sufficient coverage size in the initial access process so that the signal can be correctly and timely received is a problem to be solved.

[0097] Figure 4 An example configuration of a random access opportunity according to an embodiment of the disclosure is shown.

[0098] Specifically, in the present embodiment, a transmission method and device for uplink signal are described. The coverage enhancement for uplink transmission signal improves the beamforming gain.

[0099] In the four-step contention-based random access or two-step contention-free random access process, the UE may detect that the feedback information message 2 (PDCCH scheduling PDSCH) from the base station is received after sending message 1 (random access preamble), wherein the PDSCH carries the random access feedback RAR for the UE, and the RAR carries the grant (UL grant) for scheduling the UE for uplink transmission, i.e. message 3 in the four-step contention-based random access.

[0100] Because at this time the UE may not have accessed the system, or the base station has not explicitly identified the identity of the UE that is performing random access, therefore, the base station cannot accurately know the situation of the UE, and therefore may not be able to accurately schedule the uplink transmission, resulting in that the modulation and coding scheme (MCS) and / or the size of the time-frequency resource in the configured uplink grant are not suitable; or because the UE itself is far away, the coverage range of the base station device cannot serve well. Therefore, the design of repeated transmission of uplink signal is an effective way to improve the UE uplink signal.

[0101] Specifically, the UE obtains the configuration information of the repeated transmission of the uplink signal through the system information from the base station, and / or the RAR in the DCI or PDSCH scheduling the uplink transmission. Specifically, there are

[0102] • Through system information configuration or pre-set manner, the UE obtains one or more groups (for example, 16 groups) of resource configuration information that can be used for message three PUSCH transmission;

[0103] • In the DCI transmitted via the scheduling message three PUSCH (retransmission) and / or the scheduling message three PUSCH (initial transmission) RAR, the UE obtains a set of resource configuration information indicated for the transmission of message three PUSCH; in particular, the set of resource configuration information indicated may be one of multiple sets of resource configuration information obtained through system information configuration or pre-set methods, and may be indicated by index; for example, 16 sets of configurations can be indicated by 4 bits.

[0104] • The resource configuration information may be time-domain resource configuration information and / or frequency-domain resource configuration information;

[0105] Preferably, the configuration information and the corresponding UE confirmation method include at least one of the following: repeated transmission type, index confirmation of redundant version in repeated transmission, and repeated transmission beam confirmation.

[0106] Preferably, the configuration information may further include an indication to activate message triple retransmission (i.e., whether the configuration information includes an indication to message triple retransmission); when the base station does not know whether the UE supports message triple retransmission capability (e.g., during the random access message triple retransmission phase, when the conflict has not been resolved, the base station equipment cannot identify the UE's identity and therefore does not know the UE's capability information), specifically, it can be one of the following methods:

[0107] • Display notification; The UE uses system information from the base station and / or explicit bit information in the RAR of the DCI or PDSCH in the scheduling uplink transmission to indicate the activation message to be transmitted three times, where "1" represents activation and "0" represents inactivation.

[0108] To obtain the base station's configuration instruction for performing message triple retransmission; then, UEs that support message triple retransmission can obtain the instruction for the corresponding bit information and then read the resource configuration information for message triple retransmission; while UEs that do not perform message triple retransmission (such as older versions of UEs) can ignore the bit information instruction.

[0109] • Implicit indication; the UE determines whether to perform message three-PUSCH retransmission based on resource configuration information from the base station equipment; specifically, the resource configuration information of the base station equipment used to determine whether to perform message three-PUSCH retransmission can be one or a combination of the following specific configurations.

[0110] o Specific DMRS configuration information

[0111] ■ a specific number of DMRS symbols (e.g. 4 DMRS symbols, i.e. double DMRS symbols, and including 2 extra DMRS symbols), i.e. when the specific number of DMRS symbols is configured, the UE is to perform message 3 PUSCH repetition transmission;

[0112] ■ a specific DMRS port (e.g. DMRS port index 1), i.e. when the specific DMRS port index 1 is configured, the UE is to perform message 3 PUSCH repetition transmission;

[0113] ■ a specific DMRS sequence index (e.g. DMRS sequence index 1), i.e. when the specific DMRS sequence index 1 is configured, the UE is to perform message 3 PUSCH repetition transmission;

[0114] ■ a specific DMRS symbol location (e.g. frontloaded or special location of DMRS), i.e. when the specific DMRS symbol location is configured, the UE is to perform message 3 PUSCH repetition transmission;

[0115] o a specific MCS

[0116] ■ a specific MCS index (e.g. maximum MCS index, or minimum MCS index) to indicate, i.e. when the specific MCS index is configured, the UE is to perform message 3 PUSCH repetition transmission;

[0117] o a specific TBS

[0118] ■ a specific TBS value, i.e. when the specific TBS value is configured, the UE is to perform message 3 PUSCH repetition transmission;

[0119] ■ less than (not greater than) a fixed or configured TBS threshold value, i.e. when the configured TBS is less than (not greater than) a fixed or configured TBS threshold value, the UE is to perform message 3 PUSCH repetition transmission;

[0120] o wherein, when the UE does not support message 3 PUSCH repetition transmission, then the UE is to not employ the above specific configuration (i.e. not employ specific DMRS port, etc.), but to employ a default configuration or other configuration;

[0121] o wherein, the base station device can determine whether the UE has performed PUSCH repetition transmission for Msg3 by detecting whether a specific configuration is used in the Msg3 transmission, for example, the base station device detects a specific DMRS port in the PUSCH repetition transmission for Msg3, the base station device can determine that the UE has performed PUSCH repetition transmission for Msg3, and can detect the subsequent repetition transmission; if the base station device detects a DMRS port that is not the specific DMRS port in the PUSCH repetition transmission for Msg3, the base station device can determine that the UE has not performed PUSCH repetition transmission for Msg3, and can not detect the subsequent repetition transmission, and / or reconfigure the time-frequency resources configured for the subsequent repetition transmission (for example, reconfigure to other users);

[0122] o wherein, the specific configuration can be applied in:

[0123] ■only initial Msg3 PUSCH (all repetitions) transmission (i.e., RAR scheduled Msg3 PUSCH transmission); or

[0124] ■only first repetition of initial Msg3 PUSCH (all repetitions) transmission (i.e., first repetition of RAR scheduled Msg3 PUSCH transmission); or

[0125] ■initial Msg3 PUSCH (all repetitions) transmission and subsequent Msg3 PUSCH (i.e., TC-RNTI scrambled DCI scheduled) retransmission (all repetitions); or

[0126] ■first repetition of initial Msg3 PUSCH (all repetitions) transmission (i.e., first repetition of RAR scheduled Msg3 PUSCH transmission) and first repetition of subsequent Msg3 PUSCH retransmission (all repetitions);

[0127] The following will describe the repetition transmission types according to embodiments of the present disclosure with reference to Figure 5 to Figure 7 There are three types of repetition transmission according to embodiments of the present disclosure. Figure 5 A diagram showing an example of Msg3 (Msg3) PUSCH repetition first type according to embodiments of the present disclosure is shown. Figure 6 A diagram showing an example of PUSCH repetition second type according to embodiments of the present disclosure is shown. Figure 7 A diagram showing an example of PUSCH repetition third type according to embodiments of the present disclosure is shown.

[0128] As Figure 5 shown, the first type in the repetition transmission type specifically includes at least one of the following:

[0129] • the first slot after X1 slot intervals from the end of the slot where the downlink signal scheduling the uplink transmission is located is the starting slot for the scheduled uplink transmission;

[0130] • the starting symbol position of the PUSCH transmission in a slot, and / or the number of symbols occupied, preferably,

[0131] • the one slot can be the first slot of all PUSCH transmission repetitions;

[0132] • the number of repetitions of the PUSCH transmission, i.e. the number of slots with PUSCH transmission;

[0133] • preferably, the configured PUSCH starting symbol position and / or the number of symbols occupied in each slot with PUSCH transmission are the same as the configured PUSCH starting symbol position and / or the number of symbols occupied in the first slot;

[0134] • preferably, the "slot", "symbol" (OFDM symbol) in the embodiments of the present application can be replaced by other time domain units;

[0135] • as shown in Figure 5 , the PUSCH of message 3 scheduled from slot 1, the slot 4 after 2 slot intervals from slot 1 is the first slot to transmit PUSCH; the number of repetitions is 6, so in this type, the starting position of OFDM symbol and the number of OFDM symbols occupied in the slot of the transmission of PUSCH repetition in slots 4-9 are the same, as shown in Figure 5 case 1;

[0136] • preferably, when the configured OFDM symbol of a PUSCH transmission repetition meets one or more of the following conditions, the UE will not transmit PUSCH on the configured OFDM symbol:

[0137] o the configured OFDM symbol overlaps with the downlink part (or the downlink part + gap value) in the uplink-downlink configuration;

[0138] o the configured OFDM symbol overlaps with the flexible part (or the flexible part + gap value) in the uplink-downlink configuration;

[0139] o the configured OFDM symbol overlaps with a special downlink signal (or the special downlink signal + an interval value) configured by the base station to transmit; preferably, the special downlink signal can be at least one of the following: SSB configured by the base station to transmit, other downlink signal configured by the base station to transmit, such as SIB1 PDSCH transmitting system information, or control resource opportunity CORESET, search space, etc. scheduling system information;

[0140] o the interval between the start position of the configured OFDM symbol and the end position of the downlink part (or flexible part, or special downlink signal configured by the base station to transmit) in the uplink-downlink configuration is less than (not greater than) an interval value;

[0141] o preferably, the interval value can be pre-configured by the base station, or configured in the system message (or DCI or RAR), or fixed;

[0142] • preferably, when there is a configured OFDM symbol not used for transmission, the UE needs to perform at least one of the following operations:

[0143] o if the configured OFDM symbol contains DMRS symbols (the number is a positive integer X), the first X symbols of the remaining OFDM symbols in the slot for transmitting PUSCH are used to transmit DMRS symbols;

[0144] o the remaining OFDM symbols in the slot for transmitting PUSCH recalculate the number of REs for the data to be transmitted, determine the available modulation and coding scheme, and select the lowest modulation and coding scheme that meets the size of the data to be transmitted (transport block size), i.e. rate matching;

[0145] o according to the configured modulation and coding scheme and / or the number of REs, no signal is transmitted on the corresponding configured OFDM symbol not used for transmission during transmission; i.e. the data on the configured OFDM symbol not used for transmission is directly punctured;

[0146] • preferably, as shown in case 3 in Figure 5 , the UE can expand the start position and the number of OFDM symbols occupied by PUSCH transmission in one slot configured by the base station to the next slot; this configuration can make the base station more flexible when configuring this type of PUSCH repetition, and can better utilize the slots with downlink and / or flexible parts (for example, if the occupied symbols in one slot are not allowed to expand to the next slot, the configuration received by the UE can be similar to the example in case 1, and the length of the PUSCH transmission starting from symbol 6 in each slot is 6);

[0147] o Preferably, if the OFDM symbol(s) extending to the next slot meet one or more of the conditions described in case 2 above, the UE will not transmit PUSCH on the configured OFDM symbol(s), and the detailed handling is as described in case 2 above;

[0148] o Preferably, the OFDM symbol(s) extending to the next slot, still belong to the current slot, and are used to transmit the PUSCH part of the current slot; i.e. the data transmitted on the OFDM symbol(s) extending to the next slot, is according to the RE number calculated for the current slot,

[0149] The modulated and encoded signal is transmitted.

[0150] According to the method as described with reference to Figure 5 , the user equipment (UE) can be enabled to perform multiple repetitions in the transmission of the uplink data signal.

[0151] As shown in Figure 6 , the second type of repetition transmission type, in particular, can comprise at least one of the following configurations and / or operations:

[0152] • The first slot after X1 slot intervals from the end of the slot where the downlink signal scheduling the uplink transmission is located, is the starting slot for the scheduled uplink transmission;

[0153] • The starting symbol position, and / or the number of symbols, of the PUSCH transmission in a slot, preferably,

[0154] The slot can be the first slot of all PUSCH transmission repetitions; preferably, the PUSCH transmission is one or the first PUSCH transmission repetition;

[0155] • The number of PUSCH transmission repetitions; preferably, the number of PUSCH transmission repetitions can be the number of nominal PUSCH transmission repetitions (nominal repetition) and / or the number of actual PUSCH transmission repetitions (actual repetition);

[0156] • A PUSCH transmission time window (i.e. a time length), wherein within the PUSCH transmission time window:

[0157] o UE derives the consecutive PUSCH transmissions according to the starting point of the first PUSCH transmission repetition and the length of one PUSCH transmission, until the gap between the end position of the last PUSCH transmission repetition and the end position of the time window of the PUSCH transmission is less than a threshold value; preferably, the threshold value can be the length of the PUSCH transmission, or a length value configured by the base station or pre-set;

[0158] o UE derives the consecutive PUSCH transmissions according to the starting point of the first PUSCH transmission repetition and the length of one PUSCH transmission, until the number of nominal repetitions (or actual repetitions) reaches the number of PUSCH transmission repetitions configured by the base station or pre-set; preferably, when one PUSCH transmission repetition extends to the next slot (i.e. one PUSCH transmission occupies the symbols in multiple slots); UE can perform at least one of the following processing:

[0159] o direct transmission, i.e. allowing one PUSCH transmission repetition to span the slot interval; as shown in case 1 in Figure 6

[0160] o split transmission, i.e. splitting the PUSCH transmission into two parts according to the slot boundary; as shown in case 2 in Figure 6

[0161] o preferably, the time domain length (i.e. the number of configured symbols) of one PUSCH transmission can be greater than the time domain length of one slot;

[0162] Preferably, when the configured OFDM symbols of one PUSCH transmission repetition meet one or more of the following conditions, UE will not perform PUSCH transmission on the configured OFDM symbols:

[0163] o the configured OFDM symbols overlap with the downlink part (or the downlink part + gap value) in the uplink-downlink configuration;

[0164] o the configured OFDM symbols overlap with the flexible part (or the flexible part + gap value) in the uplink-downlink configuration; ​​

[0165] o the configured OFDM symbol overlaps with a special downlink signal (or the special downlink signal + an interval value) configured by the base station to transmit; preferably, the special downlink signal can be at least one of the following: SSB configured by the base station to transmit, other downlink signal configured by the base station to transmit, such as SIB1 PDSCH transmitting system information, or control resource opportunity CORESET, search space, etc. scheduling system information;

[0166] o the interval between the (start position of the) configured OFDM symbol and the end position of the downlink part (or flexible part, or special downlink signal configured by the base station to transmit) in the uplink-downlink configuration is less than (not greater than) an interval value;

[0167] o preferably, the interval value can be pre-configured by the base station, or configured in the system message (or DCI or RAR), or fixed;

[0168] o preferably, if the above-mentioned overlapping part is in the middle of a PUSCH transmission repetition (i.e. there are configured symbols before and after the overlapping part for the PUSCH transmission), the UE will regard the symbols after removing the overlapping part as one actual repetition (i.e. non-continuous actual repetition)

[0169] (for example, Figure 6 as shown in case 3 in the above-mentioned example, symbols 6-13 in slot 4 and 6-13 in slot 5 are combined to be regarded as one actual repetition) or similar to segmented transmission, the configured symbols before and after the overlapping part are regarded as actual transmissions respectively (i.e. 2 or more actual transmissions) (for example, Figure 6 as shown in case 4 in the above-mentioned example, symbols 6-13 in slot 4 are one actual repetition, and 6-13 in slot 5 are another actual repetition);

[0170] • preferably, when there is a configured OFDM symbol that is not used for transmission, the UE needs to perform at least one of the following operations:

[0171] o if the configured OFDM symbol contains DMRS symbols (the number is a positive integer X), the first X symbols of the remaining OFDM symbols in the slot for PUSCH transmission are used to transmit DMRS symbols;

[0172] o the remaining OFDM symbols in the slot for PUSCH transmission re-calculate the number of REs for the data to be transmitted, determine the available modulation and coding scheme, and select the lowest modulation and coding scheme that can satisfy the size of the data to be transmitted (transport block size), i.e. rate matching;

[0173] o According to the configured modulation and coding scheme and / or the number of REs, the UE does not transmit signals on the OFDM symbols not used for transmission of the configured OFDM symbols at the time of transmission; that is, the data on the OFDM symbols not used for transmission of the configured OFDM symbols is directly punctured.

[0174] According to the method as described with reference to Figure 6 , the user equipment (UE) can perform multiple repeated transmissions in the transmission of uplink data signals.

[0175] The two types described above with reference to Figure 5 and Figure 6 are both indicated by the base station (directly or indirectly) to the UE the number of repetitions required to be transmitted and / or the size (occupied time-frequency resources, etc.) in each repetition and / or the MCS / TBS size in each repetition. The third type of repeated transmission described below with reference to Figure 7 , in this type, the UE needs to autonomously determine the number of PUSCH transmission repetitions required, the position, etc.; specifically, it can include at least one of the following configurations and / or operations:

[0176] • According to the above two types, the UE obtains the configured maximum number of available repetitions N (including the nominal number of repetitions and / or the actual number of repetitions, etc.), and / or the starting position and size of each (or the first) PUSCH transmission repetition, etc.; for example Figure 7 According to the first type described in case 1 (i.e., the repetition number is 2, and the first PUSCH transmission repetition is in the first slot after 2 slots after the slot where the scheduling DCI is located), the starting positions of the two repetitions in the slot are both symbol 4, and the lengths are both 6 symbols; for example Figure 7 According to the second type described in case 2 (i.e., the nominal number of repetitions is 2, and the first PUSCH transmission repetition is in the first slot after 2 slots after the slot where the scheduling DCI is located), the starting position of the first repetition in slot 4 is symbol 4, and the second repetition is derived from symbol 10 to 6 consecutive symbols (extended to the next slot) according to the position of the first repetition and the configuration of the length of 6 symbols, assuming that cross-slot boundary transmission is allowed; the following explains the third type of way with case 2 as an example; that is, N = 2, and the TBS that can be carried on each repetition is configured to be 56 bits;

[0177] • Operation 1 or 2: the UE selects the position of one of the repetitions for PUSCH transmission according to a rule, where the rule can be one or a combination of the following:

[0178] o the position of the PUSCH repetition closest to the end of the time slot of the downlink scheduling the uplink transmission; preferably, the position of the PUSCH repetition closest to the end of the time slot of the downlink scheduling the uplink transmission is the closest PUSCH repetition position satisfying the UE processing time (including processing the downlink reception, preparing the uplink transmission, adjusting the timing advance), i.e. the interval between the end of the time slot of the downlink scheduling the uplink transmission and the start of the position of the available uplink transmission repetition is greater than or not less than the UE processing time; as shown in FIG. 3, if the UE processing time is 2.5 slots, the closest PUSCH repetition position after the downlink scheduling the uplink transmission is the second PUSCH transmission repetition after 2.5 slots; this is beneficial for the UE to send the PUSCH as soon as possible; Figure 7

[0179] o randomly selecting one PUSCH transmission repetition among the available PUSCH transmission repetitions for transmission with equal probability; preferably, the available PUSCH transmission repetition is the PUSCH transmission repetition satisfying the UE processing time;

[0180] • Operation 3: the UE determines the repetition number N_x; preferably, the UE determines the repetition number according to the maximum available repetition number or the maximum configured repetition number; the UE selects the repetition number according to the amount of data to be transmitted by the UE; the UE determines the TBS size, TBS_x, transmitted in each actual repetition according to the selected repetition number N_x; preferably, TBS_x = N_x * TBS; as shown in FIG. 4, N_x = 2, TBS = 56, then TBS_x = 56 * 2 = 112; this is beneficial for the UE to transmit as much data as possible to be transmitted by the UE, for example, the UE has 100 bits to be transmitted, if the UE only selects one repetition, it can only transmit 56 bits, if the UE can select 2 repetitions, the UE can transmit all 100 bits in one PUSCH transmission (two repetitions); Figure 7

[0181] • Operation 4: the UE determines the repetition number N_x; preferably, the UE determines the repetition number according to the maximum available repetition number or the maximum configured repetition number; in each determined PUSCH transmission repetition, the UE uses the TBS indicated by the base station (directly configured or indirectly through resource size and MCS together) to transmit each PUSCH repetition;

[0182] ​​• Operation 5: UE determines the number of repetitions N_x; preferably, the UE determines the number of repetitions can be determined by the UE according to the maximum number of repetitions available or the maximum number of repetitions configured; UE combines the time-frequency resources occupied by the determined PUSCH transmission repetitions as one PUSCH transmission resource, and transmits according to the TBS indicated by the base station (directly configured or indirectly through resource size and MCS together) used by the UE (i.e. keep the TBS unchanged, change the MCS, so that a lower modulation order and / or coding rate can be used, and a higher modulation coding gain can be obtained) or transmits according to the MCS indicated by the base station (directly configured or indirectly through resource size and TBS together) used by the UE (i.e. keep the MCS unchanged, change the TBS, so that the UE can transmit more data volume).

[0183] • Operation 6: UE, according to the TB_scaling parameter or parameter set configured (or pre-set) by the base station and / or the data volume TBS_t to be transmitted by the UE itself on the resources of the determined N_x PUSCH transmission repetitions, can determine the final TBS size used for transmission TBS_x, wherein the method of determining the final TBS size has the following options: select the minimum TB_scaling value so that TBS_x = TB_scaling * TBS is not less than (greater than) TBS_t; for example, the optional TBS_Scaling values are {0.75, 0.5, 0.25}, TBS_t = 10, TBS = 56, then the selected TBS_scaling = 0.25, and the obtained TBS_x = 14; then the UE can reselect the MCS according to the obtained TBS_x, possibly using a lower modulation order and / or coding rate, and obtaining a higher modulation coding gain;

[0184] • Preferably, the repetition can be a nominal repetition or an actual repetition obtained by the UE;

[0185] • Preferably, the UE determining the number of repetitions N_x can also be: the UE determines according to the result of comparing the received signal power (RSRP) of the downlink reference signal (such as SSB, CSI-RS, etc.) with the corresponding threshold value; for example, if there are N repetitions, there are N-1 threshold values; for example, N = 2, if the UE measures the SSB-RSRP to be less than (or not greater than) the threshold value, the UE needs to select a larger number of repetitions (i.e. N_x = 2); if the UE measures the SSB-RSRP to be less than (or greater than) the threshold value, the UE needs to select a smaller number of repetitions (i.e. N_x = 1);

[0186] • Preferably, the UE determines the number of repetitions N_x can also be determined according to the number of (transmit) beams N_beam the UE has; for example if N_beam is less than or not greater than the available number of repetitions, then N_x = N_beam; if N_beam is not less than or greater than the available number of repetitions, then N_x is the available number of repetitions.

[0187] According to the method as described with reference to Figure 7 , the user equipment (UE) can be caused to perform multiple repetitions in the transmission of the uplink data signal.

[0188] The confirmation of the redundancy version index in the repetitions will be described below with reference to Figure 8 . Figure 8 An example of the way of determining the RV in PUSCH repetitions according to embodiments of the disclosure is shown in the figure.

[0189] After encoding the data to be transmitted, the resulting encoded data sequence has different indices according to different redundancy versions, for example 0, 1, 2, 3 (different versions represent different parts of the encoded data sequence), then the way of determining the redundancy version for the multiple PUSCH transmission repetitions in a PUSCH transmission can be one or more combinations of the following:

[0190] • The same redundancy version is used for the multiple PUSCH transmission repetitions in all PUSCH transmissions (including the HARQ retransmissions), for example RV 0, as shown in (a) of Figure 8 .

[0191] • The same redundancy version is used for the multiple PUSCH transmission repetitions in one PUSCH transmission.

[0192] But the redundancy version indices are used in a certain order for the PUSCH transmission repetitions in different PUSCH transmissions; for example the certain order is RV 0, 2, 3, 1; the multiple PUSCH transmission repetitions in the first PUSCH transmission all use RV 0; the multiple PUSCH transmission repetitions in the second PUSCH transmission (retransmission that can be scheduled by DCI) all use RV 2; the multiple PUSCH transmission repetitions in the third PUSCH transmission (retransmission that can be scheduled by DCI) all use RV 3; and so on; if the used RV order reaches the last value, then the RV order is used in a circular manner in the next PUSCH transmission.

[0193] As shown in (b) of Figure 8 .

[0194] • Use RV index in a certain order for multiple PUSCH transmission repetitions in one PUSCH transmission; but use the same RV for PUSCH transmission repetitions in different PUSCH transmissions (also can be considered as re-starting the RV confirmation in the certain order for each PUSCH transmission); e.g. Figure 8 (c) as an example;

[0195] • Use RV index in a certain order for multiple PUSCH transmission repetitions in all PUSCH transmissions (including in HARQ retransmissions), i.e. for all possible PUSCH transmission repetitions; e.g. Figure 8 (d) as an example, repetition 1 in the first transmission uses RV 0, repetition 2 in the first transmission uses RV 3, repetition 1 in the second transmission uses RV 2, repetition 2 in the second transmission uses RV 1, • Preferably, the certain order of using RV index can be a longer index version, the order is arranged according to the correlation and / or complementary degree between different RVs, e.g. try to put two RV versions with strong correlation in adjacent positions in the order. For example, 8, the certain order can be 0, 3, 2, 1, 4, 7, 6, 5, etc.

[0196] According to the method as described with reference to Figure 8 , the user equipment (UE) can determine the redundancy version based on a certain manner for multiple repeated transmissions.

[0197] The confirmation of the redundancy version index in repeated transmissions will be described below with reference to Figure 9 . Figure 9 FIG. 1 shows an example of transmission beam confirmation in PUSCH repetition according to an embodiment of the disclosure.

[0198] When it is determined that there are multiple PUSCH transmission repetitions and the UE has the capability of multiple transmission beams, then the way of determining the transmission beam for multiple PUSCH transmission repetitions in a PUSCH transmission can be one or a combination of the following:

[0199] • Use the same transmission beam for multiple PUSCH transmissions in all PUSCH transmissions (including in HARQ retransmissions), preferably, a transmission beam can be randomly selected from the beams the UE has with equal probability; or use the same transmission beam as the one used for the corresponding preamble in the transmission of RAR;

[0200] Preferably, this method can be used for all repetitions in the first PUSCH or the first repetition or for the determination of the transmission beam for all PUSCH repetitions (including PUSCH repetitions in different PUSCH transmissions);

[0201] • same transmit beam for multiple PUSCH transmissions in one PUSCH transmission, different transmit beams for different PUSCH transmissions; as Figure 9 as exemplified in (a);

[0202] • different transmit beam for multiple PUSCH transmissions in one PUSCH transmission, same transmit beams for different PUSCH transmissions; as Figure 9 as exemplified in (a);

[0203] • preferably, when the interval between the starting time of the PUSCH transmission of message 3 and the (end position of the) transmission position of the preamble is no more than (or less than) a certain threshold value, the beam of the PUSCH transmission in message 3 is the same as the beam of the preamble transmission; otherwise, it is different; wherein the (end position of the) transmission position of the preamble can also be the (end position of the) received downlink signal position corresponding to the random access.

[0204] In particular, the above-mentioned PUSCH transmission and / or PUSCH transmission repetition resource confirmation or configuration method can be used for the PUSCH transmission in message 3, or normal PUSCH transmission, or semi-static uplink transmission based on high-layer scheduling, or message A in 2-step contention-based random access.

[0205] After selecting different transmit beams or different repetition numbers, the base station can determine the user-selected different transmit beams or different repetition numbers and the like by blind detection; preferably, the UE sends auxiliary information to help the base station obtain the above-mentioned information and reduce or avoid the burden of blind detection; in particular, the sent auxiliary information can include at least one of the following:

[0206] • the sent auxiliary information can be one or more of the following: the repetition number determined by the UE, the number and / or index of the transmit beams of the UE, the TBS and / or MCS determined by the UE, etc., one or more downlink beam reference signal indexes selected by the UE (for example, the base station performs beam refinement in the initial access process);

[0207] • the way of sending auxiliary information can be achieved by carrying UCI information on PUSCH; wherein the UCI can use independent coding for different auxiliary information, or joint coding; preferably, the UCI information to be sent can also be mapped according to the symbols closest to the DMRS, i.e. the modulation symbols obtained by the UCI are mapped to the REs around the DMRS in the order of left first and right second (or right first and left second), or frequency domain first and time domain second (or time domain first and frequency domain second);

[0208] • Preferably, the UCI can be carried in each repetition of a transmission, or only in one (e.g. the first) repetition;

[0209] • Thus, although the UCI can change in different PUSCH transmissions, because it is separate from the PUSCH, it does not affect the combining of repetitions between different PUSCH repetitions.

[0210] Preferably, the approach for PUSCH repetition transmission proposed by the present disclosure can be used not only for msg3 (or RAR scheduled PUSCH) transmission or retransmission, but also for normal DCI scheduled PUSCH transmission and retransmission.

[0211] Preferably, the approach for PUSCH repetition transmission proposed by the present disclosure can be used for transmitting multiple repetitions of the same TB (i.e. the same information content is repeated on multiple PUSCH resources) and / or for transmitting multiple TBs (i.e. different information content is transmitted on multiple PUSCH resources).

[0212] According to the method as described with reference to Figure 9 , the user equipment (UE) can determine a redundancy version index based on a certain approach, and perform multiple repeated transmissions.

[0213] Figure 10 is a block diagram illustrating a UE according to an embodiment of the present disclosure.

[0214] Referring to Figure 10 , the UE (1000) includes a transceiver (1001), a processor (1002), and a memory (1003). The transceiver (1001), the processor (1002), and the memory (1003) are configured to perform the operations of the UE illustrated in the figure (e.g. Figure 1 to Figure 9 ) or described above.

[0215] The above only describes preferred embodiments of the present disclosure and is not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the scope of protection of the present disclosure.

[0216] Those skilled in the art will appreciate that the disclosure includes devices for performing one or more of the operations described in the disclosure. These devices can be specially designed and manufactured for the required purposes, or they can include known devices in general use with computers. These devices have computer programs stored therein, which are selectively activated or reconfigured. Such computer programs can be stored in a device (e.g., a computer) readable medium, or in any type of media suitable for storing electronic instructions and respectively coupled to a bus, including, but not limited to, any type of disk including floppy disks, hard disks, optical disks, CD-ROMs, and magneto-optical disks, ROMs (Read-Only Memory), RAMs (Random Access Memory), EPROMs (Erasable Programmable Read-Only Memory), EEPROMs (Electrically Erasable Programmable Read-Only Memory), flash memories, magnetic cards or optical cards. That is, the readable medium includes any medium that stores or transmits information in a form readable by a device (e.g., a computer).

[0217] Those skilled in the art will appreciate that each of the structural diagrams and / or block diagrams and / or flow diagrams and combinations of blocks in the structural diagrams and / or block diagrams and / or flow diagrams can be implemented with computer program instructions. Those skilled in the art will appreciate that these computer program instructions can be provided to a general-purpose computer, a special-purpose computer, or a processor of other programmable data processing method to implement the solutions specified in the blocks of the structural diagrams and / or block diagrams and / or flow diagrams of the disclosure by the computer or the processor of other programmable data processing method.

[0218] Those skilled in the art will appreciate that the steps, measures, solutions in various operations, methods, processes discussed in the disclosure can be alternated, changed, combined or deleted. Further, other steps, measures, solutions in various operations, methods, processes discussed in the disclosure can also be alternated, changed, rearranged, decomposed, combined or deleted. Further, the steps, measures, solutions in various operations, methods, processes in the prior art can also be alternated, changed, rearranged, decomposed, combined or deleted.

[0219] The above merely describes some embodiments of the present disclosure, and it should be pointed out that, for those skilled in the art, some improvements and refinements can be made without departing from the principles of the present disclosure, and these improvements and refinements should also be considered as the protection scope of the present disclosure.

Claims

1. A method executed by a terminal in a wireless communication system, the method comprising: Receive a first control message from the base station, the first control message including configuration information about msg3 repeating; Send a random access preamble to the base station; In response to the sending of the random access preamble, a random access response (RAR) is received from the base station; Based on the RAR and the first control message, a duplicate first resource for msg3 transmission is determined; and Repeated transmission of msg3 is sent to the base station on the identified first resource. The repetition of the msg3 transmission is not sent on the following symbols: symbols indicated as downlink by uplink / downlink configuration or symbols to be sent by synchronization signal block (SSB) configuration. The repetition of msg3 transmission is a first type of PUSCH repetition. For the first type of PUSCH repetition, the starting symbol and the number of symbols occupied in the PUSCH repetition time slot are the same.

2. The method according to claim 1, further comprising: Receive a second control message from the base station for msg3 retransmission; Based on the second control message and the first control message, a duplicate second resource is determined for the retransmission of msg3; and Repeatedly send msg3 retransmission to the base station on the identified second resource. in, The retransmission of msg3 will not be sent on the following symbols: symbols indicated as downlink by uplink / downlink configuration or symbols to be sent by SSB configuration. Wherein, the retransmission of msg3 is a retransmission of the first type of PUSCH.

3. The method according to claim 2, in, The first control message is a system information block message, and the second control message is downlink control information (DCI).

4. The method according to any one of claims 1-3, in, The RAR or the second control message includes time resource allocation information and frequency resource allocation information.

5. A method performed by a base station in a wireless communication system, the method comprising: Send a first control message to the terminal, the first control message including configuration information about msg3 repeating; Receive random access preamble from the terminal; In response to the random access preamble, a random access response (RAR) is sent to the terminal. and Repeatedly receiving msg3 transmissions from the terminal on the first resource. Wherein, the first resource is determined based on the RAR and the first control message, and The repetition of the msg3 transmission is not sent on the following symbols: symbols indicated as downlink by uplink / downlink configuration or symbols to be sent as SSB by SSB configuration. The repetition of msg3 transmission is a first type of PUSCH repetition. For the first type of PUSCH repetition, the starting symbol and the number of symbols occupied in the PUSCH repetition time slot are the same.

6. The method according to claim 5, further comprising: Send a second control message to the terminal for msg3 retransmission; and The second resource receives duplicate retransmissions of msg3 from the terminal. in, The second resource is determined based on the second control message and the first control message, and Specifically, the retransmission of msg3 does not involve sending on the following symbols: symbols indicated as downlink by uplink / downlink configuration or symbols to be sent by SSB configuration. Wherein, the retransmission of msg3 is a retransmission of the first type of PUSCH.

7. The method according to claim 6, in, The first control message is a system information block message, and the second control message is downlink control information (DCI).

8. The method according to any one of claims 5-7, in, The RAR or the second control message includes time resource allocation information and frequency resource allocation information.

9. A terminal in a wireless communication system, the terminal comprising: transceiver; and The controller is configured as follows: Receive a first control message from the base station, the first control message including configuration information about msg3 repeating; Send a random access preamble to the base station; In response to the sending of the random access preamble, a random access response (RAR) is received from the base station; Based on the RAR and the first control message, a duplicate first resource for msg3 transmission is determined; and Send msg3 to the base station on the identified first resource. The repetition of the msg3 transmission is not sent on the following symbols: symbols indicated as downlink by uplink / downlink configuration or symbols to be sent by synchronization signal block (SSB) configuration. The repetition of msg3 transmission is a first type of PUSCH repetition. For the first type of PUSCH repetition, the starting symbol and the number of symbols occupied in the PUSCH repetition time slot are the same.

10. The terminal according to claim 9, wherein the controller is further configured to: Receive a second control message from the base station for msg3 retransmission; Based on the second control message and the first control message, a duplicate second resource is determined for the retransmission of msg3; and Repeatedly send msg3 retransmission to the base station on the identified second resource. in, The retransmission of msg3 will not be sent on the following symbols: symbols indicated as downlink by uplink / downlink configuration or symbols to be sent by SSB configuration. Wherein, the retransmission of msg3 is a retransmission of the first type of PUSCH.

11. The terminal according to claim 10, in, The first control message is a system information block message, and the second control message is downlink control information (DCI).

12. The terminal according to any one of claims 9-11, in, The RAR or the second control message includes time resource allocation information and frequency resource allocation information.

13. A base station in a wireless communication system, the base station comprising: transceiver; and The controller is configured as follows: Send a first control message to the terminal, the first control message including configuration information about msg3 repeating; Receive random access preamble from the terminal; In response to the random access preamble, a random access response (RAR) is sent to the terminal. and Repeatedly receiving msg3 transmissions from the terminal on the first resource. Wherein, the first resource is determined based on the RAR and the first control message, and The repetition of the msg3 transmission is not sent on the following symbols: symbols indicated as downlink by uplink / downlink configuration or symbols to be sent as SSB by SSB configuration. The repetition of msg3 transmission is a first type of PUSCH repetition. For the first type of PUSCH repetition, the starting symbol and the number of symbols occupied in the PUSCH repetition time slot are the same.

14. The base station according to claim 13, wherein the controller is further configured to: Send a second control message to the terminal for msg3 retransmission; and The second resource receives duplicate retransmissions of msg3 from the terminal. in, The second resource is determined based on the second control message and the first control message, and Specifically, the retransmission of msg3 does not involve sending on the following symbols: symbols indicated as downlink by uplink / downlink configuration or symbols to be sent by SSB configuration. Wherein, the retransmission of msg3 is a retransmission of the first type of PUSCH.

15. The base station according to claim 14, in, The first control message is a system information block message, and the second control message is downlink control information (DCI).

16. The base station according to any one of claims 13-15, in, The RAR or the second control message includes time resource allocation information and frequency resource allocation information.

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