Random access preamble sequence transmission power determination method, user equipment, base station, and computer readable medium

Abstract

Embodiments of the present disclosure disclose a method performed at a UE for determining random access preamble sequence transmit power and a corresponding UE, the method comprising: obtaining random access configuration information from a base station, the random access configuration information comprising a random access configuration index and random access preamble sequence subcarrier spacing indication information; obtaining a random access preamble sequence format based on the random access configuration index and the random access preamble sequence subcarrier spacing indication information; and determining a random access preamble sequence transmit power offset value corresponding to the obtained random access preamble sequence format. Embodiments of the present disclosure also disclose a method performed at a base station for determining random access preamble sequence transmit power and a corresponding base station, and a corresponding computer readable medium.

Description

[0001] This application is a divisional application of Chinese Patent Application No. 201810105219.6, filed on February 1, 2018, entitled "Method for Determining Transmit Power of Random Access Preamble Sequence, User Equipment, Base Station and Computer-Readable Medium". Technical Field

[0002] This application relates to the field of wireless communication technology, and in particular to a method for determining the transmit power of a random access preamble sequence, as well as corresponding user equipment, base station, and computer-readable medium. Background Technology

[0003] With the rapid development of the information industry, especially the growing demand from mobile internet and the Internet of Things (IoT), unprecedented challenges are being brought to future mobile communication technologies. According to the International Telecommunication Union (ITU) report ITU-RM. [IMT.BEYOND 2020.TRAFFIC], it is projected that by 2020, mobile traffic will increase nearly 1000 times compared to 2010 (the 4G era), and the number of terminal connections will exceed 17 billion. As massive numbers of IoT devices gradually penetrate mobile communication networks, the number of connected devices will be even more staggering. To address these unprecedented challenges, the communications industry and academia have launched extensive research into fifth-generation mobile communication technology (5G) for the 2020s. Currently, the ITU report ITU-RM. [IMT.VISION] discusses the framework and overall goals of future 5G, providing detailed explanations of 5G's demand outlook, application scenarios, and key performance indicators. In response to new demands in 5G, the ITU report ITU-RM. [IMT. FUTURE TECHNOLOGY TRENDS] provides information on technology trends related to 5G, aiming to address significant issues such as significantly improved system throughput, consistent end-user experience, scalability to support IoT, latency, energy efficiency, cost, network flexibility, support for emerging services, and flexible spectrum utilization.

[0004] Random access is a crucial step in wireless communication systems, used to establish uplink synchronization between a terminal and a base station, and for the base station to assign an ID to the terminal for identification. The performance of random access directly impacts the user experience. In traditional wireless communication systems, such as Long Term Evolution (LTE) and its upgraded version (LTE-A), random access is applied in various scenarios, including initial link establishment, cell handover, uplink re-establishment, and Radio Resource Control (RRC) connection reconstruction. Based on whether the terminal has exclusive access to preamble resources, it is classified into contention-based random access and contention-free random access. In contention-based random access, when each terminal attempts to establish an uplink link, it may select a preamble sequence from the same preamble sequence resource. As a result, multiple terminals may select the same preamble sequence to send to the base station. Therefore, the occurrence of such conflicts will lead to the failure of preamble sequence transmission. How to design a retransmission method for random access preamble sequences and improve the success probability of retransmission of random access preamble sequences are key indicators affecting the performance of random access.

[0005] In LTE-A, the contention-based random access procedure consists of four steps. Before the random access procedure begins, the base station sends the configuration information for the random access procedure to the terminal, and the terminal performs the random access procedure based on the received configuration information.

[0006] In the first step, the terminal 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 terminal.

[0007] In the second step, the base station sends a Random Access Response (RAR) to the terminal, which includes a random access preamble sequence identifier, a timing advance instruction determined based on the delay estimate between the terminal and the base station, a Temporary Cell-Radio Network Temporary Identifier (TC-RNTI), and time-frequency resources allocated for the terminal's next uplink transmission.

[0008] In the third step, the terminal sends message three (abbreviation: MSg3) to the base station based on the information in the RAR. MSg3 contains information such as the terminal identifier and RRC link request. The terminal identifier is unique to the terminal and is used to resolve conflicts.

[0009] In the fourth step, the base station sends a conflict resolution identifier to the terminal, which includes the terminal identifier of the winning terminal in the conflict resolution. After detecting its own identifier, the terminal upgrades the temporary cell radio network temporary identifier to a cell radio network temporary identifier (C-RNTI) and sends an acknowledgment (ACK) signal to the base station to complete the random access process and wait for the base station's scheduling. Otherwise, the terminal will start a new random access process after a delay.

[0010] For a non-contention-based random access procedure, since the base station knows the terminal identifier, it can allocate a preamble sequence to the terminal. Therefore, when sending the preamble sequence, the terminal does not need to randomly select a sequence but will use the allocated preamble sequence. After detecting the allocated preamble sequence, the base station sends a corresponding random access response, including timing advance and uplink resource allocation information. After receiving the random access response, the terminal considers uplink synchronization complete and waits for further scheduling by the base station. Therefore, the initial access and non-contention-based random access procedures only contain two steps: step one is sending the preamble sequence; step two is sending the random access response.

[0011] In step one above, the base station sends a preamble sequence, and the process for determining its transmit power is as follows:

[0012] 1. Set the preamble power PREAMBLE_RECEIVED_TARGET_POWER that the base station expects to receive in a random process to preambleInitialReceivedTargetPower + DELTA_PREAMBLE + (PREAMBLE_TRANSMISSION_COUNTER - 1) * powerRampingStep. Where preambleInitialReceivedTargetPower is the initial power configured by the higher layers, DELTA_PREAMBLE is the preamble transmit power offset, PREAMBLE_TRANSMISSION_COUNTER is the number of attempts in this random process (including the initial attempt and subsequent retries), and powerRampingStep is the power ramp-up step size configured by the higher layers.

[0013] 2. Determine the final random access preamble sequence as min{P} CMAX,c (i), PREAMBLE_RECEIVED_TARGET_POWER+PL c}. Among them, P CMAX,c (i) represents the terminal's maximum transmit power (23 dBm in LTE / LTE-A), PL c This represents the path loss value.

[0014] Specifically, Table 1 shows the correspondence between the transmit power offset value PREAMBLE_RECEIVED_TARGET_POWER and the random access preamble sequence format:

[0015] Table 1. Correspondence between leader sequence formats and DELTA_PREAMBLE

[0016]

[0017] The terminal obtains the value of DELTA_PREAMBLE based on the preamble sequence format indicated by prach-ConfigIndex in the random access configuration and the correspondence in Table 1, and determines the final transmit power value based on this.

[0018] Future wireless communication systems can be roughly divided into two categories based on carrier range: below 6 GHz and above 6 GHz. Furthermore, the subcarrier spacing of the random access channel in future wireless communication systems can be 1.25 kHz, 5 kHz, 15 kHz, 30 kHz, 60 kHz, or 120 kHz; the length of the preamble sequence in the random access process can be L = 839 or L = 139. In this case, the number of frames in the random access preamble sequence format of future wireless communication systems can be greater than 40. Continuing to use the transmit power offset with only three different values ​​as shown in Table 1 above is no longer suitable for the requirements of random access processes in future wireless communication networks. Therefore, it is necessary to design new transmit power offset values ​​for the new random access preamble sequence format designed based on the new carrier range and subcarrier spacing in future wireless communication systems, and to determine the transmit power of the random access preamble sequence. Summary of the Invention

[0019] For future wireless communication systems, this disclosure proposes a novel method for determining the transmit power of a random access preamble sequence. For each new random access preamble sequence format with a new carrier range and subcarrier spacing, a new transmit power offset value is designed. Based on this, corresponding signaling is designed to indicate the preamble sequence transmit power offset value according to the indications of different carrier ranges and subcarrier spacing values. Finally, the user equipment (UE) determines the final random access preamble sequence transmit power based on the transmit power offset value and other relevant parameters.

[0020] According to one aspect of this disclosure, a method for determining the transmit power of a random access preamble sequence is provided. The method includes: acquiring random access configuration information from a base station, the random access configuration information including a random access configuration index and random access preamble sequence subcarrier spacing indication information; acquiring a random access preamble sequence format based on the random access configuration index and the random access preamble sequence subcarrier spacing indication information; and determining a random access preamble sequence transmit power offset value corresponding to the acquired random access preamble sequence format.

[0021] In an exemplary embodiment, determining the random access preamble sequence transmit power offset value corresponding to the acquired random access preamble sequence format includes: determining the random access preamble sequence transmit power offset value corresponding to the acquired random access preamble sequence format by querying a correspondence table that includes at least random access preamble sequence formats and random access preamble sequence transmit power offset values.

[0022] In one exemplary embodiment, the correspondence table further includes at least one of the following:

[0023] Random access preamble sequence subcarrier spacing indication information, and

[0024] Carrier range;

[0025] The determination of the random access preamble sequence transmit power offset value corresponding to the acquired random access preamble sequence format includes: by querying the correspondence table, determining the random access preamble sequence transmit power offset value corresponding to the acquired random access preamble sequence format and at least one of the following: random access preamble sequence subcarrier spacing indication information, carrier range.

[0026] In one exemplary embodiment, the correspondence table is predefined and stored locally on the UE.

[0027] In an exemplary embodiment, the correspondence table includes one of the following correspondence tables, where DELTA_PREAMBLE refers to the random access preamble transmit power offset value, Msg1SCS refers to the random access preamble subcarrier spacing indication information, 0, 1, 2, 3, A1, A2, A3, B1, B4, A1 / B1, A2 / B2, A3 / B3, CO, C2 refer to the defined random access preamble format, 15kHz, 30kHz, 60kHz, 120kHz are the random access preamble subcarrier spacings, and μ is a parameter indicating the random access preamble subcarrier spacing (when μ = 0, the random access preamble subcarrier spacing is 15kHz; when μ = 1, the random access preamble subcarrier spacing is 30kHz; when μ = 2, the random access preamble subcarrier spacing is 60kHz; when μ = 3, the random access preamble subcarrier spacing is 120kHz):

[0028]

[0029]

[0030]

[0031]

[0032]

[0033]

[0034]

[0035] and

[0036]

[0037]

[0038]

[0039] and

[0040]

[0041]

[0042] 0 0dB 1 -3dB 2 -6dB 3 0dB A1 8+3·μdB A2 5+3·μdB A3 3+3·μdB B 1 8+3·μdB B4 3 μdB A1 / B1 8+3·μdB A2 / B2 5+3·μdB A3 / B3 3+3·μdB CO 11+3·μdB C2 5+3 μdB;

[0043] 0 0dB 1 -3dB 2 -6dB 3 0dB

[0044] and

[0045] A1 8+3·μdB A2 5+3·μdB A3 3+3·μdB B1 8+3·μdB B4 3 μdB A1 / B1 8+3·μdB A2 / B2 5+3·μdB A3 / B3 3+3·μdB CO 11+3·μdB C2 5+3·μdB

[0046]

[0047] 0 0dB 1 -3dB 2 -6dB 3 0dB

[0048] and

[0049] A1, B1, A1 / B1 8+3·μdB A2, A2 / B2 5+3·μdB A3, A3 / B3 3+3·μdB B4 3 μdB C0 11+3·μdB C2 5+3 μdB.

[0050] According to another aspect of this disclosure, a method for determining the transmit power of a random access preamble sequence is provided. The method includes: generating random access configuration information, the random access configuration information including a random access configuration index and random access preamble sequence subcarrier spacing indication information; and sending the random access configuration information to a UE.

[0051] In an exemplary embodiment, the random access configuration index and the random access preamble sequence subcarrier spacing indication information are used by the UE to obtain the random access preamble sequence format and determine the random access preamble sequence transmit power offset value corresponding to the obtained random access preamble sequence format.

[0052] According to another aspect of this disclosure, a UE is provided, comprising: a communication interface configured for communication; a processor; and a memory storing computer-executable instructions, which, when executed by the processor, cause the processor to perform the following operations: acquiring random access configuration information from a base station, the random access configuration information including a random access configuration index and random access preamble sequence subcarrier spacing indication information; acquiring a random access preamble sequence format based on the random access configuration index and the random access preamble sequence subcarrier spacing indication information; and determining a random access preamble sequence transmit power offset value corresponding to the acquired random access preamble sequence format.

[0053] In an exemplary embodiment, determining the random access preamble sequence transmit power offset value corresponding to the acquired random access preamble sequence format includes: determining the random access preamble sequence transmit power offset value corresponding to the acquired random access preamble sequence format by querying a correspondence table that includes at least random access preamble sequence formats and random access preamble sequence transmit power offset values.

[0054] In one exemplary embodiment, the correspondence table further includes at least one of the following:

[0055] Random access preamble sequence subcarrier spacing indication information, and

[0056] Carrier range;

[0057] The determination of the random access preamble sequence transmit power offset value corresponding to the acquired random access preamble sequence format includes: by querying the correspondence table, determining the random access preamble sequence transmit power offset value corresponding to the acquired random access preamble sequence format and at least one of the following: random access preamble sequence subcarrier spacing indication information, carrier range.

[0058] In one exemplary embodiment, the correspondence table is predefined and stored locally on the UE.

[0059] According to another aspect of this disclosure, a base station is provided. The base station includes: a communication interface configured for communication; a processor; and a memory storing computer-executable instructions, which, when executed by the processor, cause the processor to perform the following operations: generating random access configuration information, the random access configuration information including a random access configuration index and random access preamble sequence subcarrier spacing indication information; and sending the random access configuration information to a UE.

[0060] In one exemplary embodiment, the random access configuration index and the random access preamble subcarrier spacing indication information are used by the UE to obtain the random access preamble format and determine the random access preamble transmit power offset value corresponding to the obtained random access preamble format.

[0061] According to another aspect of this disclosure, a computer-readable medium is provided having instructions stored thereon that, when executed by a processor, cause the processor to perform the method as described above.

[0062] The novel random access preamble transmission power determination method proposed in this disclosure is applicable to all preamble format in future wireless communication systems. It can efficiently adjust the transmission power of the preamble sequence in the random access process, improve the probability of successful random access for UE while controlling interference, significantly enhance the performance of future wireless communication systems, and provide UEs with lower access latency and a better access experience. Attached Figure Description

[0063] Figure 1 An exemplary wireless communication system to which exemplary embodiments of the present disclosure may be applied is schematically illustrated;

[0064] Figure 2 A flowchart illustrating a method for determining the transmit power of a random access preamble sequence performed at a base station side according to an exemplary embodiment of the present disclosure is shown schematically.

[0065] Figure 3 A schematic diagram of the structure of a base station according to an exemplary embodiment of the present disclosure is shown.

[0066] Figure 4A flowchart illustrating a method for determining the transmit power of a random access preamble sequence performed on the UE side according to an exemplary embodiment of the present disclosure is shown schematically; and

[0067] Figure 5 A schematic diagram of the structure of a UE according to an exemplary embodiment of the present disclosure is shown. Detailed Implementation

[0068] The embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this disclosure, and should not be construed as limiting this disclosure.

[0069] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this disclosure means 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 may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connections or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0070] 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.

[0071] 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; PCS (Personal Communication Services) that can combine voice, data processing, fax, and / or data communication capabilities; PDA (Personal Digital Assistant) that may include a radio frequency receiver, pager, internet / intranet access, web browser, notepad, calendar, and / or GPS (Global Positioning System) receiver; and conventional laptop and / or handheld computers or other devices that have and / or include a radio frequency receiver. 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 MID (Mobile Internet Device), and / or a mobile phone with music / video playback capabilities, or a smart TV, set-top box, etc. Furthermore, "terminal" or "terminal device" may be used interchangeably with "user" or "UE".

[0072] Figure 1 An exemplary wireless communication system 100 to which the exemplary embodiments of this disclosure apply is illustrated, wherein a UE detects indication information. The wireless communication system 100 includes one or more fixed infrastructure units forming a network distributed over a geographical area. The infrastructure unit may also be referred to as an Access Point (AP), Access Terminal (AT), Base Station (BS), Node-B, and evolved NodeB (eNB), next-generation base station (gNB), or other terms used in the art. The term "access point" in the embodiments of this disclosure may be replaced with any of the foregoing terms. Figure 1As shown, one or more base stations 101 and 102 provide services to several mobile stations (MS) or users (UEs) or terminal devices or terminals 103 and 104 within a service area, such as a cell or cell sector. In some systems, one or more BSs are communicatively coupled to a controller forming an access network, which is communicatively coupled to one or more core networks. This disclosure is not limited to any particular wireless communication system.

[0073] In the time and / or frequency domains, base stations 101 and 102 transmit downlink (DL) communication signals 112 and 113 to UEs 103 and 104, respectively. UEs 103 and 104 communicate with one or more base units 101 and 102 via uplink (UL) communication signals 111 and 114, respectively. In one embodiment, the mobile communication system 100 is an Orthogonal Frequency Division Multiplexing (OFDM) / Orthogonal Frequency Division Multiple Access (OFDMA) system comprising multiple base stations and multiple UEs, including base station 101 and base station 102, and multiple UEs including UE 103 and UE 104. Base station 101 communicates with UE 103 via uplink communication signal 111 and downlink communication signal 112. When a base station has downlink packets to send to a UE, each UE receives a downlink allocation (resource), such as a set of radio resources within a Physical Downlink Shared Channel (PDSCH) or a narrowband Physical Downlink Shared Channel (NPDSCH). When a terminal needs to send packets to a base station in the uplink, the UE receives authorization from the base station, where the authorization allocation includes a set of uplink radio resources within a Physical Uplink Shared Channel (PUSCH) or a narrowband uplink shared channel (NPUSCH). The UE obtains downlink or uplink scheduling information from its own dedicated PDCCH (Physical Downlink Control Channel), MPDCCH, EPDCCH, or NPDCCH. The downlink or uplink scheduling information and other control information carried by the downlink control channel are called downlink control information (DCI). Figure 1Different physical channels for examples of downlink 112 and uplink 111 are also shown. Downlink 112 includes PDCCH or EPDCCH or NPDCCH or MPDCCH 121, PDSCH or NPDSCH 122, Physical Control Format Indicator Channel (PCFICH) 123, Physical Multicast Channel (PMCH) 124, Physical Broadcast Channel (PBCH) or Narrowband Physical Broadcast Channel (NPBCH) 125, Physical Hybrid Automatic Repeat Request Indicator Channel (PHICH) 126, and Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), or Narrowband Primary / Secondary Synchronization Signal (NPSS / NSSS) 12x. Downlink control channel 121 transmits downlink control signals to the terminal. DCI120 is carried via downlink control channel 121. PDSCH122 sends data information to the UE. PCFICH123 sends information for decoding PDCCH, such as dynamically indicating the number of symbols used by PDCCH121. PMCH124 carries broadcast / multicast information. PBCH or NPBCH125 carries the Master Information Block (MIB) for UE early discovery and cell-wide coverage. PHICH carries Hybrid Automatic Repeat Request (HARQ) information, which indicates whether the base station has correctly received the transmitted signal. Uplink 111 includes Physical Uplink Control Channel (PUCCH) 131, PUSCH 132, and Physical Random Access Channel (PRACH) 133 carrying random access information.

[0074] In one embodiment, the wireless communication network 100 uses OFDMA or a multi-carrier architecture, including Adaptive Modulation and Coding (AMC) on the downlink and a next-generation single-carrier FDMA or multi-carrier OFDMA architecture for UL transmission. FDMA-based single-carrier architectures include Interleaved Frequency Division Multiple Access (IFDMA), Localized Frequency Division Multiple Access (LFDMA), and Extended Discrete Fourier Transform Orthogonal Frequency Division Multiplexing (DFT-SOFDM) of IFDMA or LFDMA. In addition, it also includes various enhanced non-orthogonal multiple access NOMA architectures of OFDMA systems, such as PDMA (Pattern division multiple access), SCMA (Sparse codemultiple access), MUSA (Multi-user shared access), LCRS FDS (Low code ratespreading Frequency domain spreading), NCMA (Non-orthogonal coded multiple access), RSMA (Resource spreading multiple access), IGMA (Interleave-gridmultiple) access), LDS-SVE (Low density spreading with signature vector extension), LSSA (Low code rate and signature based shared access), NOCA (Non-orthogonal coded access), IDMA (Interleave division multiple access), RDMA (Repetition division multiple access), GOCA (Group orthogonal coded access), WSMA (Welch-bound equality based spread MA), etc.

[0075] In an OFDMA system, remote units are served by allocating downlink or uplink radio resources, typically comprising a set of subcarriers on one or more OFDM symbols. Example OFDMA protocols include LTE, an evolution of the 3GPP UMTS standard, and the IEEE 802.16 standard. The architecture may also include the use of transport technologies such as multi-carrier CDMA (MC-CDMA), multi-carrier direct sequence CDMA (MC-DS-CDMA), or orthogonal frequency and code division multiplexing (OFCDM) with one or two-dimensional transport. Alternatively, it may be based on simpler time and / or frequency division multiplexing / multiple access technologies, or combinations of these different technologies. In an alternative embodiment, the communication system may use other cellular communication system protocols, including but not limited to TDMA or direct sequence CDMA.

[0076] The random access preamble sequence format in future wireless communication systems can be represented by Table 2 below. For preamble sequence formats numbered A1, A2, A3, B1, B2, B3, B4, C0, and C2, the value of μ can be 0, 1, 2, or 3, and κ = T. s / (1 / 30720)(T s The actual sampling interval (in milliseconds, ms) is the ratio of the actual sampling interval to the reference sampling interval.

[0077] Table 2. Format of Random Access Preamble Sequence

[0078]

[0079]

[0080] The random access preamble format is predefined for future wireless communication systems. Among the formats defined above, the actual used random access preamble format (or combinations) are 14 formats: 0, 1, 2, 3, A1, A2, A3, B1, B4, A1 / B1, A2 / B2, A3 / B3, C0, and C2. Format A1 / B1 represents combining several A1s and several B1s in a specific order; format A2 / B2 represents combining several A2s and several B2s in a specific order; and format A3 / B3 represents combining several A3s and several B3s in a specific order. It should be noted that formats A1, A2, A3, B1, B4, A1 / B1, A2 / B2, A3 / B3, C0, and C2 each have several sub-formats with different subcarrier spacing sizes. Specifically, when the value of μ is different (μ = 0, 1, 2, 3), A1, A2, A3, B1, B4, A1 / B1, A2 / B2, A3 / B3, C0 and C2 each have 4 different sub-formats. In this case, there are a total of 44 different random access preamble sequence formats: 0, 1, 2, 3, A1(15 / 30 / 60 / 120kHz), A2(15 / 30 / 60 / 120kHz), A3(15 / 30 / 60 / 120kHz), B1(15 / 30 / 60 / 120kHz), B4(15 / 30 / 60 / 120kHz), A1 / B1(15 / 30 / 60 / 120kHz), A2 / B2(15 / 30 / 60 / 120kHz), A3 / B3(15 / 30 / 60 / 120kHz), C0(15 / 30 / 60 / 120kHz), and C2(15 / 30 / 60 / 120kHz). Among them, 15 / 30 / 60 / 120kHz represents the subcarrier spacing of the random access preamble sequence with a frequency of 15kHz, 30kHz, 60kHz, or 120kHz, respectively.

[0081] The following will refer to Figure 2 The flowchart of a method for determining the transmit power of a random access preamble sequence executed on the base station side according to an exemplary embodiment of the present disclosure is described in detail.

[0082] Figure 2 A flowchart illustrating a method 200 for determining the transmit power of a random access preamble sequence performed at a base station according to an exemplary embodiment of the present disclosure is shown schematically. Figure 2 As shown, method 200 may include steps 201 and 202.

[0083] In step 201, the base station can generate random access configuration information, which includes a random access configuration index and random access preamble sequence subcarrier spacing indication information.

[0084] The random access configuration information is 9 bits long, of which 8 bits are prach-ConfigIndex, numbered 0-255, indicating most of the random access configuration information, including the random access preamble sequence format (it should be noted that the preamble sequence format indicated by prach-ConfigIndex may or may not include the subcarrier spacing information of the preamble sequence. If the preamble sequence format indicated by prach-ConfigIndex is A1, A2, A3, B1, B4, A1 / B1, A2 / B2, A3 / B3, C0, or C2, then it does not include subcarrier spacing information; if the preamble sequence format indicated by prach-ConfigIndex is 0, 1, 2, or 3, then it includes subcarrier spacing information); 1 bit is prach-Msg1SubcarrierSpacing, indicating the random access preamble sequence subcarrier spacing information when the preamble sequence format is A1, A2, A3, B1, B4, A1 / B1, A2 / B2, A3 / B3, C0, or C2.

[0085] In step 202, the base station may send the random access configuration information to the UE.

[0086] In one exemplary embodiment, the random access configuration information is included in a broadcast message sent to the UE via a Physical Broadcast Channel (PBCH or New Radio-Physical Broadcast Channel, NR-PBCH). The broadcast message includes system carrier range information (above 6 GHz or below 6 GHz) and Remaining System Information (RMSI) indication information. Specifically, the random access configuration information is included in the RMSI indication information.

[0087] In one exemplary embodiment, the UE can detect the broadcast message, obtain the carrier range information and RMSI indication information therein, and determine whether the system's carrier range is higher than 6 GHz or lower than 6 GHz. The UE can also read the RMSI based on the obtained RMSI indication information to obtain the random access configuration information therein.

[0088] The UE can obtain the random access preamble format based on the random access configuration index prach-ConfigIndex and the random access preamble sequence subcarrier spacing indication information prach-Msg1SubcarrierSpacing in the obtained random access configuration information, and then determine the random access preamble sequence transmit power offset value DELTA_PREAMBLE corresponding to the obtained random access preamble sequence format, which will be described in detail later.

[0089] The following will refer to Figure 3 The structure of a base station according to exemplary embodiments of the present disclosure will be described. Figure 3 A structural block diagram of a base station 300 according to an exemplary embodiment of the present disclosure is schematically shown. The base station 300 can be used to perform reference... Figure 2 Method 200 is described herein. For simplicity, only a schematic structure of a base station according to exemplary embodiments of the present disclosure is described herein, and references to the preceding text are omitted. Figure 2 The details of the method described have already been elaborated in 200.

[0090] like Figure 3 As shown, the base station 300 includes a communication interface 301 for external communication; a processing unit or processor 302, which may be a single unit or a combination of multiple units for executing different steps of the method; and a memory 303 storing computer-executable instructions that, when executed by the processor 302, cause the processor 302 to perform the following operations: generating random access configuration information, the random access configuration information including a random access configuration index and random access preamble sequence subcarrier spacing indication information; and sending the random access configuration information to the UE.

[0091] As mentioned above, the random access configuration index and the random access preamble sequence subcarrier spacing indication information can be used by the UE to obtain the random access preamble sequence format.

[0092] The following will refer to Figure 4 The flowchart of a method for determining the transmit power of a random access preamble sequence performed on the UE side according to an exemplary embodiment of the present disclosure is described in detail.

[0093] Figure 4 A flowchart illustrating a method 400 for determining the transmit power of a random access preamble sequence performed on the UE side according to an exemplary embodiment of the present disclosure is shown schematically. Figure 4 As shown, method 400 may include steps 401, 402 and 403.

[0094] In step 401, the UE can obtain random access configuration information from the base station, which includes a random access configuration index and a random access preamble sequence subcarrier spacing indication information.

[0095] The random access configuration information is 9 bits long, of which 8 bits are prach-ConfigIndex, numbered 0-255, indicating most of the random access configuration information, including the random access preamble sequence format (it should be noted that the preamble sequence format indicated by prach-ConfigIndex may or may not include the subcarrier spacing information of the preamble sequence. If the preamble sequence format indicated by prach-ConfigIndex is A1, A2, A3, B1, B4, A1 / B1, A2 / B2, A3 / B3, C0, or C2, then it does not include subcarrier spacing information; if the preamble sequence format indicated by prach-ConfigIndex is 0, 1, 2, or 3, then it includes subcarrier spacing information); 1 bit is prach-Msg1SubcarrierSpacing, indicating the random access preamble sequence subcarrier spacing information when the preamble sequence format is A1, A2, A3, B1, B4, A1 / B1, A2 / B2, A3 / B3, C0, or C2.

[0096] In one exemplary embodiment, the UE receives a broadcast message from a base station transmitted on the Physical Broadcast Channel (PBCH or NR-PBCH). The broadcast message includes system carrier range information (above 6 GHz or below 6 GHz) and RMSI indication information. Specifically, random access configuration information is included in the RMSI indication information.

[0097] In one exemplary embodiment, the UE can detect the broadcast message, obtain the carrier range information and RMSI indication information therein, and determine whether the system's carrier range is higher than 6 GHz or lower than 6 GHz. The UE can also read the RMSI based on the obtained RMSI indication information to obtain the random access configuration information therein.

[0098] In step 402, the UE can obtain the random access preamble sequence format based on the random access configuration index and the random access preamble sequence subcarrier spacing indication information.

[0099] As mentioned earlier, the random access preamble format is predefined for future wireless communication systems. Among the formats defined above, the actual used random access preamble format (or combinations) are 14 formats: 0, 1, 2, 3, A1, A2, A3, B1, B4, A1 / B1, A2 / B2, A3 / B3, C0, and C2. Format A1 / B1 represents combining several A1s and several B1s in a specific order; format A2 / B2 represents combining several A2s and several B2s in a specific order; and format A3 / B3 represents combining several A3s and several B3s in a specific order. It should be noted that formats A1, A2, A3, B1, B4, A1 / B1, A2 / B2, A3 / B3, C0, and C2 each have several sub-formats with different subcarrier spacing sizes. Specifically, when the value of μ is different (μ = 0, 1, 2, 3), A1, A2, A3, B1, B4, A1 / B1, A2 / B2, A3 / B3, C0 and C2 each have 4 different sub-formats. In this case, there are a total of 44 different random access preamble sequence formats: 0, 1, 2, 3, A1(15 / 30 / 60 / 120kHz), A2(15 / 30 / 60 / 120kHz), A3(15 / 30 / 60 / 120kHz), B1(15 / 30 / 60 / 120kHz), B4(15 / 30 / 60 / 120kHz), A1 / B1(15 / 30 / 60 / 120kHz), A2 / B2(15 / 30 / 60 / 120kHz), A3 / B3(15 / 30 / 60 / 120kHz), C0(15 / 30 / 60 / 120kHz), and C2(15 / 30 / 60 / 120kHz). Among them, 15 / 30 / 60 / 120kHz represents the subcarrier spacing of the random access preamble sequence with a frequency of 15kHz, 30kHz, 60kHz, or 120kHz, respectively.

[0100] The UE can store a predefined correspondence between the random access preamble sequence format and the random access preamble sequence transmit power offset value DELTA_PREAMBLE locally. Alternatively, it can store a predefined correspondence between the random access preamble sequence format, random access preamble sequence subcarrier spacing indication information, carrier range and random access preamble sequence transmit power offset value DELTA_PREAMBLE.

[0101] In step 403, the UE can determine the random access preamble transmit power offset value DELTA_PREAMBLE corresponding to the acquired random access preamble format.

[0102] In one exemplary embodiment, the UE can determine the random access preamble sequence transmit power offset value DELTA_PREAMBLE corresponding to the acquired random access preamble sequence format by querying a correspondence table that includes at least the random access preamble sequence format and the random access preamble sequence transmit power offset value DELTA_PREAMBLE.

[0103] In another exemplary embodiment, the correspondence table may further include at least one of random access preamble sequence subcarrier spacing indication information and carrier range. In this case, the random access preamble sequence transmit power offset value corresponding to the acquired random access preamble sequence format and at least one of the following can be determined by querying the correspondence table: random access preamble sequence subcarrier spacing indication information and carrier range.

[0104] It should be noted that the random access preamble format can refer to formats such as 0, 1, 2, 3, A1, A2, A3, B1, B4, A1 / B1, A2 / B2, A3 / B3, C0, and C2, which are independent of the subcarrier spacing of the random access preamble sequence. It can also refer to formats such as 0, 1, 2, 3, A1 (15 / 30 / 60 / 120kHz), A2 (15 / 30 / 60 / 120kHz), A3 (15 / 30 / 60 / 120kHz), B1 (15... The formats related to the subcarrier spacing of the random access preamble sequence are B4 (15 / 30 / 60 / 120kHz), A1 / B1 (15 / 30 / 60 / 120kHz), A2 / B2 (15 / 30 / 60 / 120kHz), A3 / B3 (15 / 30 / 60 / 120kHz), C0 (15 / 30 / 60 / 120kHz), and C2 (15 / 30 / 60 / 120kHz).

[0105] A possible correspondence between random access preamble sequence format and the random access preamble sequence transmit power offset value DELTA_PREAMBLE is given in Table 3. As mentioned above, in the following description, DELTA_PREAMBLE refers to the random access preamble sequence transmit power offset value, Msg1SCS refers to the random access preamble sequence subcarrier spacing indication information, 0, 1, 2, 3, A1, A2, A3, B1, B4, A1 / B1, A2 / B2, A3 / B3, C0, and C2 refer to the defined random access preamble sequence format, and 15kHz, 30kHz, 60kHz, and 120kHz are the random access preamble sequence subcarrier spacings.

[0106] Table 3. Correspondence between Random Access Preamble Sequence Format and DELTA_PREAMBLE

[0107]

[0108]

[0109] The correspondence between another possible random access preamble sequence format and the preamble sequence transmit power offset value DELTA_PREAMBLE can be given in Table 4.

[0110] Table 4. Correspondence between Random Access Preamble Sequence Format and DELTA_PREAMBLE

[0111]

[0112]

[0113]

[0114] The correspondence between another possible random access preamble sequence format and the preamble sequence transmit power offset value DELTA_PREAMBLE can be given in Table 5.

[0115] Table 5. Correspondence between Random Access Preamble Sequence Format and DELTA_PREAMBLE

[0116]

[0117]

[0118] The correspondence between another possible random access preamble format and the preamble transmit power offset value DELTA_PREAMBLE can be given in Table 6.

[0119] Table 6. Correspondence between Random Access Preamble Sequence Format and DELTA_PREAMBLE

[0120]

[0121]

[0122] The correspondence between another possible random access preamble format and the preamble transmit power offset value DELTA_PREAMBLE can be given in Table 7.

[0123] Table 7. Correspondence between Random Access Preamble Sequence Format and DELTA_PREAMBLE

[0124]

[0125]

[0126]

[0127] The correspondence between another possible random access preamble sequence format and the preamble sequence transmit power offset value DELTA_PREAMBLE can be given in Table 8.

[0128] Table 8. Correspondence between Random Access Preamble Sequence Format and DELTA_PREAMBLE

[0129]

[0130]

[0131] The correspondence between another possible random access preamble sequence format and the preamble sequence transmit power offset value DELTA_PREAMBLE can be given in Table 9.

[0132] Table 9. Correspondence between Random Access Preamble Sequence Format and DELTA_PREAMBLE

[0133]

[0134]

[0135]

[0136] The correspondence between another possible random access preamble format and the preamble transmit power offset value DELTA_PREAMBLE can be given in Table 10.

[0137] Table 10. Correspondence between Random Access Preamble Sequence Format and DELTA_PREAMBLE

[0138]

[0139]

[0140] A possible random access preamble sequence format, the correspondence between random access preamble sequence subcarrier spacing indication information and preamble sequence transmit power offset value DELTA_PREAMBLE can be given in Table 11.

[0141] Table 11. Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0142]

[0143] It should be noted that even if some columns in Table 11 are swapped, it still represents a possible random access preamble sequence format, the correspondence between the random access preamble sequence subcarrier spacing indication information and the preamble sequence transmit power offset value DELTA_PREAMBLE, as shown in Table 12.

[0144] Table 12. Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0145]

[0146] It should be noted that splitting Tables 11 and 12 into two sub-tables according to the carrier range still represents a possible random access preamble sequence format, the correspondence between the random access preamble sequence subcarrier spacing indication information and the preamble sequence transmit power offset value DELTA_PREAMBLE, as shown in Tables 13 and 14 (Tables 13-1 and 13-2 are sub-tables of Table 13, and Tables 14-1 and 14-2 are sub-tables of Table 14).

[0147] Table 13-1 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0148]

[0149] Table 13-2 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0150]

[0151]

[0152] Table 14-1 Correspondence between Random Access Preamble Sequence Format and Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS) and DELTA_PREAMBLE

[0153]

[0154] Table 14-2 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0155]

[0156] Another possible random access preamble format, the correspondence between the random access preamble subcarrier spacing indication information and the preamble transmit power offset value DELTA_PREAMBLE can be given in Table 15.

[0157] Table 15. Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0158]

[0159]

[0160] It should be noted that even if some columns in Table 15 are swapped, it still represents a possible random access preamble sequence format, the correspondence between the random access preamble sequence subcarrier spacing indication information and the preamble sequence transmit power offset value DELTA_PREAMBLE, as shown in Table 16.

[0161] Table 16. Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0162]

[0163]

[0164] It should be noted that splitting Tables 15 and 16 into two sub-tables according to the carrier range still represents a possible random access preamble sequence format, the correspondence between the random access preamble sequence subcarrier spacing indication information and the preamble sequence transmit power offset value DELTA_PREAMBLE, as shown in Tables 17 and 18 (Tables 17-1 and 17-2 are sub-tables of Table 17, and Tables 18-1 and 18-2 are sub-tables of Table 18).

[0165] Table 17-1 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0166]

[0167]

[0168] Table 17-2 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0169]

[0170] Table 18-1 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0171]

[0172]

[0173] Table 18-2 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0174]

[0175] Another possible random access preamble format, the correspondence between the random access preamble subcarrier spacing indication information and the preamble transmit power offset value DELTA_PREAMBLE can be given in Table 19.

[0176] Table 19. Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-MsglSubcarrierSpacing, abbreviated as MsglSCS), and DELTA_PREAMBLE

[0177]

[0178] It should be noted that even if some columns in Table 19 are swapped, it still represents a possible random access preamble sequence format, the correspondence between the random access preamble sequence subcarrier spacing indication information and the preamble sequence transmit power offset value DELTA_PREAMBLE, as shown in Table 20.

[0179] Table 20: Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msgl SCS), and DELTA_PREAMBLE

[0180]

[0181] It should be noted that splitting Tables 19 and 20 into two sub-tables according to the carrier range still represents a possible random access preamble sequence format, the correspondence between the random access preamble sequence subcarrier spacing indication information and the preamble sequence transmit power offset value DELTA_PREAMBLE, as shown in Tables 21 and 22 (Tables 21-1 and 21-2 are sub-tables of Table 21, and Tables 22-1 and 22-2 are sub-tables of Table 22).

[0182] Table 21-1 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0183]

[0184] Table 21-2 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0185]

[0186]

[0187] Table 22-1 Correspondence between Random Access Preamble Sequence Format and Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS) and DELTA_PREAMBLE

[0188]

[0189] Table 22-2 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0190]

[0191] Another possible random access preamble format, the correspondence between the random access preamble subcarrier spacing indication information and the preamble transmit power offset value DELTA_PREAMBLE can be given in Table 23.

[0192] Table 23. Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0193]

[0194]

[0195] It should be noted that even if some columns in Table 23 are swapped, it still represents a possible random access preamble sequence format, the correspondence between the random access preamble sequence subcarrier spacing indication information and the preamble sequence transmit power offset value DELTA_PREAMBLE, as shown in Table 24.

[0196] Table 24. Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0197]

[0198]

[0199] It should be noted that splitting Tables 23 and 24 into two sub-tables according to the carrier range still represents a possible random access preamble sequence format, the correspondence between the random access preamble sequence subcarrier spacing indication information and the preamble sequence transmit power offset value DELTA_PREAMBLE, as shown in Tables 25 and 26 (Tables 25-1 and 25-2 are sub-tables of Table 25, and Tables 26-1 and 26-2 are sub-tables of Table 26).

[0200] Table 25-1 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0201]

[0202]

[0203] Table 25-2 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0204]

[0205] Table 26-1 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0206]

[0207]

[0208] Table 26-2 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0209]

[0210] Another possible random access preamble format, the correspondence between the random access preamble subcarrier spacing indication information and the preamble transmit power offset value DELTA_PREAMBLE can be given in Table 27.

[0211] Table 27. Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0212]

[0213] It should be noted that even if some columns in Table 27 are swapped, it still represents a possible random access preamble sequence format, the correspondence between the random access preamble sequence subcarrier spacing indication information and the preamble sequence transmit power offset value DELTA_PREAMBLE, as shown in Table 28.

[0214] Table 28. Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0215]

[0216] It should be noted that splitting Tables 27 and 28 into two sub-tables according to the carrier range still represents a possible random access preamble sequence format, the correspondence between the random access preamble sequence subcarrier spacing indication information and the preamble sequence transmit power offset value DELTA_PREAMBLE, as shown in Tables 29 and 30 (Tables 29-1 and 29-2 are sub-tables of Table 29, and Tables 30-1 and 30-2 are sub-tables of Table 30).

[0217] Table 29-1 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0218]

[0219] Table 29-2 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0220]

[0221]

[0222] Table 30-1 Correspondence between Random Access Preamble Sequence Format and Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS) and DELTA_PREAMBLE

[0223]

[0224] Table 30-2 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0225]

[0226] Another possible random access preamble format, the correspondence between the random access preamble subcarrier spacing indication information and the preamble transmit power offset value DELTA_PREAMBLE can be given in Table 31.

[0227] Table 31. Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0228]

[0229]

[0230] It should be noted that even if some columns in Table 31 are swapped, it still represents a possible random access preamble sequence format, the correspondence between the random access preamble sequence subcarrier spacing indication information and the preamble sequence transmit power offset value DELTA_PREAMBLE, as shown in Table 32.

[0231] Table 32. Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0232]

[0233]

[0234] It should be noted that splitting Tables 31 and 32 into two sub-tables according to the carrier range still represents a possible random access preamble sequence format, the correspondence between the random access preamble sequence subcarrier spacing indication information and the preamble sequence transmit power offset value DELTA_PREAMBLE, as shown in Tables 33 and 34 (Tables 33-1 and 33-2 are sub-tables of Table 33, and Tables 34-1 and 34-2 are sub-tables of Table 34).

[0235] Table 33-1 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0236]

[0237]

[0238] Table 33-2 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0239]

[0240] Table 34-1 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0241]

[0242]

[0243] Table 34-2 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0244]

[0245] Another possible random access preamble format, the correspondence between the random access preamble subcarrier spacing indication information and the preamble transmit power offset value DELTA_PREAMBLE can be given in Table 35.

[0246] Table 35. Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0247]

[0248] It should be noted that even if some columns in Table 35 are swapped, it still represents a possible random access preamble sequence format, the correspondence between the random access preamble sequence subcarrier spacing indication information and the preamble sequence transmit power offset value DELTA_PREAMBLE, as shown in Table 36.

[0249] Table 36. Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0250]

[0251] It should be noted that splitting Tables 35 and 36 into two sub-tables according to the carrier range still represents a possible random access preamble sequence format, the correspondence between the random access preamble sequence subcarrier spacing indication information and the preamble sequence transmit power offset value DELTA_PREAMBLE, as shown in Tables 37 and 38 (Tables 37-1 and 37-2 are sub-tables of Table 37, and Tables 38-1 and 38-2 are sub-tables of Table 38).

[0252] Table 37-1 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0253]

[0254] Table 37-2 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0255]

[0256]

[0257] Table 38-1 Correspondence between Random Access Preamble Sequence Format and Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS) and DELTA_PREAMBLE

[0258]

[0259] Table 38-2 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0260]

[0261] Another possible random access preamble format, the correspondence between the random access preamble subcarrier spacing indication information and the preamble transmit power offset value DELTA_PREAMBLE can be given in Table 39.

[0262] Table 39. Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0263]

[0264]

[0265] It should be noted that even if some columns in Table 39 are swapped, it still represents a possible random access preamble sequence format, the correspondence between the random access preamble sequence subcarrier spacing indication information and the preamble sequence transmit power offset value DELTA_PREAMBLE, as shown in Table 40.

[0266] Table 40 shows the correspondence between the random access preamble sequence format, the random access preamble sequence subcarrier spacing indication information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE.

[0267]

[0268]

[0269] It should be noted that splitting Tables 39 and 40 into two sub-tables according to the carrier range still represents a possible random access preamble sequence format, the correspondence between the random access preamble sequence subcarrier spacing indication information and the preamble sequence transmit power offset value DELTA_PREAMBLE, as shown in Tables 41 and 42 (Tables 41-1 and 41-2 are sub-tables of Table 41, and Tables 42-1 and 42-2 are sub-tables of Table 42).

[0270] Table 41-1 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0271]

[0272]

[0273] Table 41-2 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0274]

[0275] Table 42-1 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0276]

[0277]

[0278] Table 42-2 Correspondence between Random Access Preamble Sequence Format, Random Access Preamble Sequence Subcarrier Spacing Indication Information (prach-Msg1SubcarrierSpacing, abbreviated as Msg1SCS), and DELTA_PREAMBLE

[0279]

[0280] Another possible random access preamble format, the correspondence between the random access preamble subcarrier spacing indication information and the preamble transmit power offset value DELTA_PREAMBLE can be given in Table 43.

[0281] Table 43. Correspondence between Random Access Preamble Sequence Format and DELTA_PREAMBLE

[0282] 0 0dB 1 -3dB 2 -6dB 3 0dB A1 8+3·μdB A2 5+3·μdB A3 3+3·μdB B1 8+3·μdB B4 3 μdB A1 / B1 8+3·μdB A2 / B2 5+3·μdB A3 / B3 3+3·μdB C0 11+3·μdB C2 5+3·μdB

[0283] Where μ is a parameter indicating the subcarrier spacing of the random access preamble sequence (indication value is 15.2). μThe value of μ (kHz) can be 0, 1, 2, 3: when μ = 0, the random access preamble subcarrier spacing is 15 kHz; when μ = 1, the random access preamble subcarrier spacing is 30 kHz; when μ = 2, the random access preamble subcarrier spacing is 60 kHz; and when μ = 3, the random access preamble subcarrier spacing is 120 kHz.

[0284] It should be noted that splitting Table 43 into two sub-tables according to the length of the random access sequence still represents a possible correspondence between the random access preamble sequence format and the preamble sequence transmit power offset value DELTA_PREAMBLE, as shown in Table 44 (Tables 44-1 and 44-2 are sub-tables of Table 44).

[0285] Table 44-1 Correspondence between Random Access Preamble Sequence Format and DELTA_PREAMBLE

[0286] 0 0dB 1 -3dB 2 -6dB 3 0dB

[0287] Table 44-2 Correspondence between Random Access Preamble Sequence Format and DELTA_PREAMBLE

[0288] A1 8+3·μdB A2 5+3·μdB A3 3+3·μdB B1 8+3·μdB B4 3 μdB A1 / B1 8+3·μdB A2 / B2 5+3·μdB A3 / B3 3+3·μdB C0 11+3·μdB C2 5+3·μdB

[0289] Where μ is a parameter indicating the subcarrier spacing of the random access preamble sequence (indication value is 15.2). μ The value of μ (kHz) can be 0, 1, 2, 3: when μ = 0, the random access preamble subcarrier spacing is 15 kHz; when μ = 1, the random access preamble subcarrier spacing is 30 kHz; when μ = 2, the random access preamble subcarrier spacing is 60 kHz; and when μ = 3, the random access preamble subcarrier spacing is 120 kHz.

[0290] Another possible random access preamble format, the correspondence between random access preamble subcarrier spacing indication information and preamble transmit power offset value DELTA_PREAMBLE can be given in Table 45.

[0291] Table 45. Correspondence between Random Access Preamble Sequence Format and DELTA_PREAMBLE

[0292]

[0293]

[0294] Where μ is a parameter indicating the subcarrier spacing of the random access preamble sequence (indication value is 15.2). μThe value of μ (kHz) can be 0, 1, 2, 3: when μ = 0, the random access preamble subcarrier spacing is 15 kHz; when μ = 1, the random access preamble subcarrier spacing is 30 kHz; when μ = 2, the random access preamble subcarrier spacing is 60 kHz; and when μ = 3, the random access preamble subcarrier spacing is 120 kHz.

[0295] It should be noted that splitting Table 45 into two sub-tables according to the length of the random access sequence still represents a possible correspondence between the random access preamble sequence format and the preamble sequence transmit power offset value DELTA_PREAMBLE, as shown in Table 46 (Tables 46-1 and 46-2 are sub-tables of Table 46).

[0296] Table 46-1 Correspondence between Random Access Preamble Sequence Format and DELTA_PREAMBLE

[0297] 0 0dB 1 -3dB 2 -6dB 3 0dB

[0298] Table 46-2 Correspondence between Random Access Preamble Sequence Format and DELTA_PREAMBLE

[0299]

[0300]

[0301] Where μ is a parameter indicating the subcarrier spacing of the random access preamble sequence (indication value is 15.2). μ The value of μ (kHz) can be 0, 1, 2, 3: when μ = 0, the random access preamble subcarrier spacing is 15 kHz; when μ = 1, the random access preamble subcarrier spacing is 30 kHz; when μ = 2, the random access preamble subcarrier spacing is 60 kHz; and when μ = 3, the random access preamble subcarrier spacing is 120 kHz.

[0302] After the UE determines the random access preamble transmit power offset value DELTA_PREAMBLE as described above, the random access preamble transmit power PREAMBLE_RECEIVED_TARGET_POWER that the base station expects to receive can be set to:

[0303] PREAMBLE_RECEIVED_TARGET_POWER=

[0304] ra-PreambleInitialReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER-1)*powerRampingStep,

[0305] Wherein, ra-PreambleInitialReceivedTargetPower is the initial transmit power configured by the higher layer, DELTA_PREAMBLE is the transmit power offset value of the random access preamble sequence, PREAMBLE_POWER_RAMPING_COUNTER is the power ramp-up count, and powerRampingStep is the power ramp-up step size configured by the higher layer.

[0306] Then, the UE can determine the final random access preamble transmit power as min{P}. CMAX,c (i), PREAMBLE_RECEIVED_TARGET_POWER+PL c}, where P CMAX,c (i) represents the UE's maximum transmit power, PL c This represents the path loss value.

[0307] The following will refer to Figure 5 The structure of the UE according to an exemplary embodiment of the present invention will be described. Figure 5 A structural block diagram of a UE 500 according to an exemplary embodiment of the present invention is schematically shown. The UE 500 can be used to perform reference... Figure 4 Method 400 is described herein. For simplicity, only an illustrative structure of the UE according to exemplary embodiments of the present disclosure is described herein, and references to previously cited examples are omitted. Figure 4 The details of the method described have already been elaborated in 400.

[0308] like Figure 5 As shown, UE 500 includes a communication interface 501 for external communication; a processing unit or processor 502, which may be a single unit or a combination of multiple units for executing different steps of the method; and a memory 503 storing computer-executable instructions that, when executed by processor 502, cause processor 502 to perform the following operations: obtaining random access configuration information from a base station, the random access configuration information including a random access configuration index and random access preamble sequence subcarrier spacing indication information; obtaining a random access preamble sequence format based on the random access configuration index and random access preamble sequence subcarrier spacing indication information; and determining a random access preamble sequence transmit power offset value corresponding to the obtained random access preamble sequence format.

[0309] In an exemplary embodiment, UE 500 can determine the random access preamble sequence transmit power offset value DELTA_PREAMBLE corresponding to the acquired random access preamble sequence format by querying a correspondence table that includes at least the random access preamble sequence format and the random access preamble sequence transmit power offset value DELTA_PREAMBLE.

[0310] In another exemplary embodiment, the correspondence table may further include at least one of random access preamble sequence subcarrier spacing indication information and carrier range. In this case, UE 500 can determine the random access preamble sequence transmit power offset value DELTA_PREAMBLE corresponding to the acquired random access preamble sequence format and at least one of the following: random access preamble sequence subcarrier spacing indication information, carrier range, by querying the correspondence table.

[0311] As mentioned above, the mapping table is predefined and can be stored locally on the UE 500.

[0312] The novel random access preamble transmission power determination method proposed in this disclosure is applicable to all preamble format in future wireless communication systems. It can efficiently adjust the transmission power of the preamble sequence in the random access process, improve the probability of successful random access for the terminal while controlling interference, significantly enhance the performance of future wireless communication systems, and provide the terminal with lower access latency and a better access experience.

[0313] Computer-executable instructions or programs for implementing the functions of the various embodiments of the present invention can be recorded on a computer-readable storage medium. The corresponding functions can be implemented by causing a computer system to read and execute the programs recorded on the recording medium. The term "computer system" here can refer to a computer system embedded in the device, and may include an operating system or hardware (such as peripheral devices). "Computer-readable storage medium" can be a semiconductor recording medium, an optical recording medium, a magnetic recording medium, a short-time dynamic program storage medium, or any other computer-readable recording medium.

[0314] Various features or functional modules of the devices used in the above embodiments can be implemented or executed by circuits (e.g., monolithic or multi-chip integrated circuits). Circuits designed to perform the functions described in this specification may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination of the above devices. A general-purpose processor may be a microprocessor, or any existing processor, controller, microcontroller, or state machine. The above circuits may be digital circuits or analog circuits. In cases where advancements in semiconductor technology have led to new integrated circuit technologies that replace existing integrated circuits, one or more embodiments of the present invention may also be implemented using these new integrated circuit technologies.

[0315] Those skilled in the art will understand that this disclosure includes devices for performing one or more of the operations described in this application. These devices may be specifically designed and manufactured for the desired purpose, or may include known devices found in general-purpose computers. These devices have computer programs stored therein that can be selectively activated or reconfigured. Such computer programs may be stored in a device (e.g., a computer)-readable medium or in any type of medium suitable for storing electronic instructions and 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), ROM (Read-Only Memory), RAM (Random Access Memory), EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), flash memory, magnetic cards, or optical cards. That is, a readable medium includes any medium by which a device (e.g., a computer) stores or transmits information in a readable form.

[0316] Those skilled in the art will understand that each block in these structural diagrams and / or block diagrams and / or flow diagrams, as well as combinations of blocks in these structural diagrams and / or block diagrams and / or flow diagrams, can be implemented using computer program instructions. Those skilled in the art will understand that these computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing method for implementation, thereby enabling the processor of the computer or other programmable data processing method to execute the schemes specified in the blocks or plurality of blocks of the structural diagrams and / or block diagrams and / or flow diagrams disclosed herein.

[0317] Those skilled in the art will understand that the steps, measures, and schemes in the various operations, methods, and processes discussed in this disclosure can be alternated, modified, combined, or deleted. Furthermore, other steps, measures, and schemes in the various operations, methods, and processes discussed in this disclosure can also be alternated, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and schemes in the prior art that are similar to those in the various operations, methods, and processes disclosed in this disclosure can also be alternated, modified, rearranged, decomposed, combined, or deleted.

[0318] The above description is only a partial embodiment of this disclosure. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principles of this disclosure, and these improvements and modifications should also be considered within the scope of protection of this disclosure.

Claims

1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising: Receive random access configuration information from the base station, the random access configuration information including information on the physical random access channel (PRACH) configuration index, which is used to indicate one of a plurality of preamble formats; The target power is set based on the initial transmit power, the preamble sequence transmit power offset value, the configured power ramp step size, and the power ramp count; as well as Based on the target power, a random access preamble sequence is sent to the base station. The preamble sequence transmit power offset value is associated with the preamble format and subcarrier spacing.

2. The method according to claim 1, wherein, The target power is set based on the following formula: PREAMBLE_RECEIVED_TARGET_POWER= ra-PreambleInitialReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER-1)*powerRampingStep, Wherein, PREAMBLE_RECEIVED_TARGET_POWER is the target power, ra-PreambleInitialReceivedTargetPower is the initial transmit power, DELTA_PREAMBLE is the preamble sequence transmit power offset value, PREAMBLE_POWER_RAMPING_COUNTER is the power ramp-up count, and powerRampingStep is the power ramp-up step size.

3. The method according to claim 1, in, The initial transmit power is configured by higher-layer signaling, and / or The power ramp-up step size is configured by higher-level signaling.

4. The method according to claim 1, wherein, The transmit power offset value of the preamble sequence is associated with the power offset.

5. The method according to any one of claims 1-4, wherein, If the subcarrier spacing is 15 kHz, then the preamble sequence transmit power offset value is determined to be one of 0, 3, 5, 8, or 11 dB; or If the subcarrier spacing is 30 kHz, then the preamble sequence transmit power offset value is determined to be one of 3, 6, 8, 11, or 14 dB; or If the subcarrier spacing is 60 kHz, then the preamble sequence transmit power offset value is determined to be one of 6, 9, 11, 14, or 17 dB; or If the subcarrier spacing is 120 kHz, the preamble sequence transmit power offset value is determined to be one of 9, 12, 14, 17, or 20 dB.

6. A user equipment (UE) in a wireless communication system, the UE comprising: transceiver; as well as At least one processor coupled to the transceiver, wherein the at least one processor is configured to: Receive random access configuration information from the base station, the random access configuration information including information on the physical random access channel (PRACH) configuration index, which is used to indicate one of a plurality of preamble formats; The target power is set based on the initial transmit power, the preamble sequence transmit power offset value, the configured power ramp step size, and the power ramp count; as well as Based on the target power, a random access preamble sequence is sent to the base station. The preamble sequence transmit power offset value is associated with the preamble format and subcarrier spacing.

7. The UE according to claim 6, wherein, The target power is set based on the following formula: PREAMBLE RECEIVED TARGET POWER= ra-PreambleInitialReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER-1)*powerRampingStep, Wherein, PREAMBLE_RECEIVED_TARGET_POWER is the target power, ra-PreambleInitialReceivedTargetPower is the initial transmit power, DELTA_PREAMBLE is the preamble sequence transmit power offset value, PREAMBLE_POWER_RAMPING_COUNTER is the power ramp-up count, and powerRampingStep is the power ramp-up step size.

8. The UE according to claim 6, in, The initial transmit power is configured by higher-layer signaling, and / or The power ramp-up step size is configured by higher-level signaling.

9. The UE according to claim 6, wherein, The transmit power offset value of the preamble sequence is associated with the power offset.

10. The UE according to any one of claims 6-9, wherein, If the subcarrier spacing is 15 kHz, then the preamble sequence transmit power offset value is determined to be one of 0, 3, 5, 8, or 11 dB; or If the subcarrier spacing is 30 kHz, then the preamble sequence transmit power offset value is determined to be one of 3, 6, 8, 11, or 14 dB; or If the subcarrier spacing is 60 kHz, then the preamble sequence transmit power offset value is determined to be one of 6, 9, 11, 14, or 17 dB; or If the subcarrier spacing is 120 kHz, the preamble sequence transmit power offset value is determined to be one of 9, 12, 14, 17, or 20 dB.

11. A method performed by a base station in a wireless communication system, the method comprising: Send random access configuration information to user equipment (UE), the random access configuration information including information on the physical random access channel (PRACH) configuration index, which is used to indicate one of a plurality of preamble formats; as well as Receive the random access preamble sequence associated with the target power from the UE. The target power is associated with the initial transmit power, the preamble sequence transmit power offset, the configured power ramp step size, and the power ramp count; and The preamble sequence transmit power offset value is associated with the preamble format and subcarrier spacing.

12. The method according to claim 11, wherein, The target power is set based on the following formula: PREAMBLE_RECEIVED_TARGET_POWER= ra-PreambleInitialReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER-1)*powerRampingStep, Wherein, PREAMBLE_RECEIVED_TARGET_POWER is the target power, ra-PreambleInitialReceivedTargetPower is the initial transmit power, DELTA_PREAMBLE is the preamble sequence transmit power offset value, PREAMBLE_POWER_RAMPING_COUNTER is the power ramp-up count, and powerRampingStep is the power ramp-up step size.

13. The method according to claim 11, in, The initial transmit power is configured by higher-layer signaling, and / or The power ramp-up step size is configured by higher-level signaling.

14. The method according to claim 11, wherein, The transmit power offset value of the preamble sequence is associated with the power offset.

15. The method according to any one of claims 11-14, wherein, If the subcarrier spacing is 15 kHz, then the preamble sequence transmit power offset value is determined to be one of 0, 3, 5, 8, or 11 dB; or If the subcarrier spacing is 30 kHz, then the preamble sequence transmit power offset value is determined to be one of 3, 6, 8, 11, or 14 dB; or If the subcarrier spacing is 60 kHz, then the preamble sequence transmit power offset value is determined to be one of 6, 9, 11, 14, or 17 dB; or If the subcarrier spacing is 120 kHz, the preamble sequence transmit power offset value is determined to be one of 9, 12, 14, 17, or 20 dB.

16. A base station in a wireless communication system, the base station comprising: transceiver; as well as At least one processor coupled to the transceiver, wherein the at least one processor is configured to: Send random access configuration information to user equipment (UE), the random access configuration information including information on the physical random access channel (PRACH) configuration index, which is used to indicate one of a plurality of preamble formats; as well as Receive the random access preamble sequence associated with the target power from the UE. The target power is associated with the initial transmit power, the preamble sequence transmit power offset, the configured power ramp step size, and the power ramp count; and The preamble sequence transmit power offset value is associated with the preamble format and subcarrier spacing.

17. The base station according to claim 16, wherein, The target power is set based on the following formula: PREAMBLE_RECEIVED_TARGET_POWER= ra-PreambleInitialReceivedTargetPower+DELTA_PREAMBLE+(PREAMBLE_POWER_RAMPING_COUNTER-1)*powerRampingStep, Wherein, PREAMBLE_RECEIVED_TARGET_POWER is the target power, ra-PreambleInitialReceivedTargetPower is the initial transmit power, DELTA_PREAMBLE is the preamble sequence transmit power offset value, PREAMBLE_POWER_RAMPING_COUNTER is the power ramp-up count, and powerRampingStep is the power ramp-up step size.

18. The base station according to claim 16, The initial transmit power is configured by higher-layer signaling, and / or The power ramp-up step size is configured by higher-level signaling.

19. The base station according to claim 16, wherein, The transmit power offset value of the preamble sequence is associated with the power offset.

20. The base station according to any one of claims 16-19, wherein, If the subcarrier spacing is 15 kHz, then the preamble sequence transmit power offset value is determined to be one of 0, 3, 5, 8, or 11 dB; or If the subcarrier spacing is 30 kHz, then the preamble sequence transmit power offset value is determined to be one of 3, 6, 8, 11, or 14 dB; or If the subcarrier spacing is 60 kHz, then the preamble sequence transmit power offset value is determined to be one of 6, 9, 11, 14, or 17 dB; or If the subcarrier spacing is 120 kHz, the preamble sequence transmit power offset value is determined to be one of 9, 12, 14, 17, or 20 dB.

21. A computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to perform the method according to any one of claims 1 to 5.

22. A computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to perform the method according to any one of claims 11 to 15.

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